[BACK]Return to lond CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom

Diff for /loncom/lond between versions 1.178.2.9 and 1.276

version 1.178.2.9, 2004/03/22 09:05:11 version 1.276, 2005/01/26 12:13:58
Line 20 Line 20
 #  #
 # You should have received a copy of the GNU General Public License  # You should have received a copy of the GNU General Public License
 # along with LON-CAPA; if not, write to the Free Software  # along with LON-CAPA; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA      # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #  #
 # /home/httpd/html/adm/gpl.txt  # /home/httpd/html/adm/gpl.txt
 #  #
Line 45  use Authen::Krb4; Line 45  use Authen::Krb4;
 use Authen::Krb5;  use Authen::Krb5;
 use lib '/home/httpd/lib/perl/';  use lib '/home/httpd/lib/perl/';
 use localauth;  use localauth;
   use localenroll;
   use localstudentphoto;
 use File::Copy;  use File::Copy;
 use LONCAPA::ConfigFileEdit;  use LONCAPA::ConfigFileEdit;
   use LONCAPA::lonlocal;
   use LONCAPA::lonssl;
   use Fcntl qw(:flock);
   
 my $DEBUG = 1;       # Non zero to enable debug log entries.  my $DEBUG = 0;       # Non zero to enable debug log entries.
   
 my $status='';  my $status='';
 my $lastlog='';  my $lastlog='';
   
 my $VERSION='$Revision$'; #' stupid emacs  my $VERSION='$Revision$'; #' stupid emacs
 my $remoteVERSION;  my $remoteVERSION;
 my $currenthostid;  my $currenthostid="default";
 my $currentdomainid;  my $currentdomainid;
   
 my $client;  my $client;
 my $clientip;  my $clientip; # IP address of client.
 my $clientname;  my $clientdns; # DNS name of client.
   my $clientname; # LonCAPA name of client.
 my $cipher; # Cipher key negotiated with client.  
 my $tmpsnum = 0;; # Id of tmpputs.  
   
 my $server;  my $server;
 my $thisserver;  my $thisserver; # DNS of us.
   
   my $keymode;
   
   my $cipher; # Cipher key negotiated with client
   my $tmpsnum = 0; # Id of tmpputs.
   
 #   # 
 #   Connection type is:  #   Connection type is:
Line 77  my $thisserver; Line 85  my $thisserver;
   
 my $ConnectionType;  my $ConnectionType;
   
 my %hostid;  my %hostid; # ID's for hosts in cluster by ip.
 my %hostdom;  my %hostdom; # LonCAPA domain for hosts in cluster.
 my %hostip;  my %hostip; # IPs for hosts in cluster.
   my %hostdns; # ID's of hosts looked up by DNS name.
   
 my %managers; # Ip -> manager names  my %managers; # Ip -> manager names
   
Line 98  my $CLIENT_OK  = 1; Line 107  my $CLIENT_OK  = 1;
 my $MANAGER_OK = 2;  my $MANAGER_OK = 2;
 my %Dispatcher;  my %Dispatcher;
   
   
 #  #
 #  The array below are password error strings."  #  The array below are password error strings."
 #  #
Line 113  my @passwderrors = ("ok", Line 123  my @passwderrors = ("ok",
    "lcpasswd Cannot set new passwd.",     "lcpasswd Cannot set new passwd.",
    "lcpasswd Username has invalid characters",     "lcpasswd Username has invalid characters",
    "lcpasswd Invalid characters in password",     "lcpasswd Invalid characters in password",
     "11", "12",     "lcpasswd User already exists", 
     "lcpasswd Password mismatch");                     "lcpasswd Something went wrong with user addition.",
       "lcpasswd Password mismatch",
       "lcpasswd Error filename is invalid");
   
   
 #  The array below are lcuseradd error strings.:  #  The array below are lcuseradd error strings.:
Line 135  my @adderrors    = ("ok", Line 147  my @adderrors    = ("ok",
     "lcuseradd Could not add user.",      "lcuseradd Could not add user.",
     "lcuseradd Password mismatch");      "lcuseradd Password mismatch");
   
   
   
 #  #
 #   Statistics that are maintained and dislayed in the status line.  #   Statistics that are maintained and dislayed in the status line.
 #  #
 my $Transactions; # Number of attempted transactions.  my $Transactions = 0; # Number of attempted transactions.
 my $Failures; # Number of transcations failed.  my $Failures     = 0; # Number of transcations failed.
   
 #   ResetStatistics:   #   ResetStatistics: 
 #      Resets the statistics counters:  #      Resets the statistics counters:
Line 149  sub ResetStatistics { Line 163  sub ResetStatistics {
     $Failures     = 0;      $Failures     = 0;
 }  }
   
   #------------------------------------------------------------------------
   #
   #   LocalConnection
   #     Completes the formation of a locally authenticated connection.
   #     This function will ensure that the 'remote' client is really the
   #     local host.  If not, the connection is closed, and the function fails.
   #     If so, initcmd is parsed for the name of a file containing the
   #     IDEA session key.  The fie is opened, read, deleted and the session
   #     key returned to the caller.
   #
   # Parameters:
   #   $Socket      - Socket open on client.
   #   $initcmd     - The full text of the init command.
   #
   # Implicit inputs:
   #    $clientdns  - The DNS name of the remote client.
   #    $thisserver - Our DNS name.
   #
   # Returns:
   #     IDEA session key on success.
   #     undef on failure.
   #
   sub LocalConnection {
       my ($Socket, $initcmd) = @_;
       Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
       if($clientdns ne $thisserver) {
    &logthis('<font color="red"> LocalConnection rejecting non local: '
    ."$clientdns ne $thisserver </font>");
    close $Socket;
    return undef;
       }  else {
    chomp($initcmd); # Get rid of \n in filename.
    my ($init, $type, $name) = split(/:/, $initcmd);
    Debug(" Init command: $init $type $name ");
   
    # Require that $init = init, and $type = local:  Otherwise
    # the caller is insane:
   
    if(($init ne "init") && ($type ne "local")) {
       &logthis('<font color = "red"> LocalConnection: caller is insane! '
        ."init = $init, and type = $type </font>");
       close($Socket);;
       return undef;
   
    }
    #  Now get the key filename:
   
    my $IDEAKey = lonlocal::ReadKeyFile($name);
    return $IDEAKey;
       }
   }
   #------------------------------------------------------------------------------
   #
   #  SSLConnection
   #   Completes the formation of an ssh authenticated connection. The
   #   socket is promoted to an ssl socket.  If this promotion and the associated
   #   certificate exchange are successful, the IDEA key is generated and sent
   #   to the remote peer via the SSL tunnel. The IDEA key is also returned to
   #   the caller after the SSL tunnel is torn down.
   #
   # Parameters:
   #   Name              Type             Purpose
   #   $Socket          IO::Socket::INET  Plaintext socket.
   #
   # Returns:
   #    IDEA key on success.
   #    undef on failure.
   #
   sub SSLConnection {
       my $Socket   = shift;
   
       Debug("SSLConnection: ");
       my $KeyFile         = lonssl::KeyFile();
       if(!$KeyFile) {
    my $err = lonssl::LastError();
    &logthis("<font color=\"red\"> CRITICAL"
    ."Can't get key file $err </font>");
    return undef;
       }
       my ($CACertificate,
    $Certificate) = lonssl::CertificateFile();
   
   
       # If any of the key, certificate or certificate authority 
       # certificate filenames are not defined, this can't work.
   
       if((!$Certificate) || (!$CACertificate)) {
    my $err = lonssl::LastError();
    &logthis("<font color=\"red\"> CRITICAL"
    ."Can't get certificates: $err </font>");
   
    return undef;
       }
       Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
   
       # Indicate to our peer that we can procede with
       # a transition to ssl authentication:
   
       print $Socket "ok:ssl\n";
   
       Debug("Approving promotion -> ssl");
       #  And do so:
   
       my $SSLSocket = lonssl::PromoteServerSocket($Socket,
    $CACertificate,
    $Certificate,
    $KeyFile);
       if(! ($SSLSocket) ) { # SSL socket promotion failed.
    my $err = lonssl::LastError();
    &logthis("<font color=\"red\"> CRITICAL "
    ."SSL Socket promotion failed: $err </font>");
    return undef;
       }
       Debug("SSL Promotion successful");
   
       # 
       #  The only thing we'll use the socket for is to send the IDEA key
       #  to the peer:
   
       my $Key = lonlocal::CreateCipherKey();
       print $SSLSocket "$Key\n";
   
       lonssl::Close($SSLSocket); 
   
       Debug("Key exchange complete: $Key");
   
       return $Key;
   }
   #
   #     InsecureConnection: 
   #        If insecure connections are allowd,
   #        exchange a challenge with the client to 'validate' the
   #        client (not really, but that's the protocol):
   #        We produce a challenge string that's sent to the client.
   #        The client must then echo the challenge verbatim to us.
   #
   #  Parameter:
   #      Socket      - Socket open on the client.
   #  Returns:
   #      1           - success.
   #      0           - failure (e.g.mismatch or insecure not allowed).
   #
   sub InsecureConnection {
       my $Socket  =  shift;
   
       #   Don't even start if insecure connections are not allowed.
   
       if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
    return 0;
       }
   
       #   Fabricate a challenge string and send it..
   
       my $challenge = "$$".time; # pid + time.
       print $Socket "$challenge\n";
       &status("Waiting for challenge reply");
   
       my $answer = <$Socket>;
       $answer    =~s/\W//g;
       if($challenge eq $answer) {
    return 1;
       } else {
    logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
    &status("No challenge reqply");
    return 0;
       }
       
   
   }
   #
   #   Safely execute a command (as long as it's not a shel command and doesn
   #   not require/rely on shell escapes.   The function operates by doing a
   #   a pipe based fork and capturing stdout and stderr  from the pipe.
   #
   # Formal Parameters:
   #     $line                    - A line of text to be executed as a command.
   # Returns:
   #     The output from that command.  If the output is multiline the caller
   #     must know how to split up the output.
   #
   #
   sub execute_command {
       my ($line)    = @_;
       my @words     = split(/\s/, $line); # Bust the command up into words.
       my $output    = "";
   
       my $pid = open(CHILD, "-|");
       
       if($pid) { # Parent process
    Debug("In parent process for execute_command");
    my @data = <CHILD>; # Read the child's outupt...
    close CHILD;
    foreach my $output_line (@data) {
       Debug("Adding $output_line");
       $output .= $output_line; # Presumably has a \n on it.
    }
   
       } else { # Child process
    close (STDERR);
    open  (STDERR, ">&STDOUT");# Combine stderr, and stdout...
    exec(@words); # won't return.
       }
       return $output;
   }
   
   
   #   GetCertificate: Given a transaction that requires a certificate,
   #   this function will extract the certificate from the transaction
   #   request.  Note that at this point, the only concept of a certificate
   #   is the hostname to which we are connected.
   #
   #   Parameter:
   #      request   - The request sent by our client (this parameterization may
   #                  need to change when we really use a certificate granting
   #                  authority.
   #
   sub GetCertificate {
       my $request = shift;
   
       return $clientip;
   }
   
 #  #
 #   Return true if client is a manager.  #   Return true if client is a manager.
 #  #
Line 161  sub isManager { Line 397  sub isManager {
 sub isClient {  sub isClient {
     return (($ConnectionType eq "client") || ($ConnectionType eq "both"));      return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
 }  }
   
   
   #
   #   ReadManagerTable: Reads in the current manager table. For now this is
   #                     done on each manager authentication because:
   #                     - These authentications are not frequent
   #                     - This allows dynamic changes to the manager table
   #                       without the need to signal to the lond.
   #
   sub ReadManagerTable {
   
       #   Clean out the old table first..
   
      foreach my $key (keys %managers) {
         delete $managers{$key};
      }
   
      my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
      if (!open (MANAGERS, $tablename)) {
         logthis('<font color="red">No manager table.  Nobody can manage!!</font>');
         return;
      }
      while(my $host = <MANAGERS>) {
         chomp($host);
         if ($host =~ "^#") {                  # Comment line.
            next;
         }
         if (!defined $hostip{$host}) { # This is a non cluster member
       #  The entry is of the form:
       #    cluname:hostname
       #  cluname - A 'cluster hostname' is needed in order to negotiate
       #            the host key.
       #  hostname- The dns name of the host.
       #
             my($cluname, $dnsname) = split(/:/, $host);
             
             my $ip = gethostbyname($dnsname);
             if(defined($ip)) {                 # bad names don't deserve entry.
               my $hostip = inet_ntoa($ip);
               $managers{$hostip} = $cluname;
               logthis('<font color="green"> registering manager '.
                       "$dnsname as $cluname with $hostip </font>\n");
            }
         } else {
            logthis('<font color="green"> existing host'." $host</font>\n");
            $managers{$hostip{$host}} = $host;  # Use info from cluster tab if clumemeber
         }
      }
   }
   
   #
   #  ValidManager: Determines if a given certificate represents a valid manager.
   #                in this primitive implementation, the 'certificate' is
   #                just the connecting loncapa client name.  This is checked
   #                against a valid client list in the configuration.
   #
   #                  
   sub ValidManager {
       my $certificate = shift; 
   
       return isManager;
   }
   #
   #  CopyFile:  Called as part of the process of installing a 
   #             new configuration file.  This function copies an existing
   #             file to a backup file.
   # Parameters:
   #     oldfile  - Name of the file to backup.
   #     newfile  - Name of the backup file.
   # Return:
   #     0   - Failure (errno has failure reason).
   #     1   - Success.
   #
   sub CopyFile {
   
       my ($oldfile, $newfile) = @_;
   
       #  The file must exist:
   
       if(-e $oldfile) {
   
    # Read the old file.
   
    my $oldfh = IO::File->new("< $oldfile");
    if(!$oldfh) {
       return 0;
    }
    my @contents = <$oldfh>;  # Suck in the entire file.
   
    # write the backup file:
   
    my $newfh = IO::File->new("> $newfile");
    if(!(defined $newfh)){
       return 0;
    }
    my $lines = scalar @contents;
    for (my $i =0; $i < $lines; $i++) {
       print $newfh ($contents[$i]);
    }
   
    $oldfh->close;
    $newfh->close;
   
    chmod(0660, $newfile);
   
    return 1;
       
       } else {
    return 0;
       }
   }
   #
   #  Host files are passed out with externally visible host IPs.
   #  If, for example, we are behind a fire-wall or NAT host, our 
   #  internally visible IP may be different than the externally
   #  visible IP.  Therefore, we always adjust the contents of the
   #  host file so that the entry for ME is the IP that we believe
   #  we have.  At present, this is defined as the entry that
   #  DNS has for us.  If by some chance we are not able to get a
   #  DNS translation for us, then we assume that the host.tab file
   #  is correct.  
   #    BUGBUGBUG - in the future, we really should see if we can
   #       easily query the interface(s) instead.
   # Parameter(s):
   #     contents    - The contents of the host.tab to check.
   # Returns:
   #     newcontents - The adjusted contents.
   #
   #
   sub AdjustHostContents {
       my $contents  = shift;
       my $adjusted;
       my $me        = $perlvar{'lonHostID'};
   
    foreach my $line (split(/\n/,$contents)) {
    if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
       chomp($line);
       my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
       if ($id eq $me) {
             my $ip = gethostbyname($name);
             my $ipnew = inet_ntoa($ip);
            $ip = $ipnew;
    #  Reconstruct the host line and append to adjusted:
   
      my $newline = "$id:$domain:$role:$name:$ip";
      if($maxcon ne "") { # Not all hosts have loncnew tuning params
        $newline .= ":$maxcon:$idleto:$mincon";
      }
      $adjusted .= $newline."\n";
   
         } else { # Not me, pass unmodified.
      $adjusted .= $line."\n";
         }
    } else {                  # Blank or comment never re-written.
       $adjusted .= $line."\n"; # Pass blanks and comments as is.
    }
    }
    return $adjusted;
   }
   #
   #   InstallFile: Called to install an administrative file:
   #       - The file is created with <name>.tmp
   #       - The <name>.tmp file is then mv'd to <name>
   #   This lugubrious procedure is done to ensure that we are never without
   #   a valid, even if dated, version of the file regardless of who crashes
   #   and when the crash occurs.
   #
   #  Parameters:
   #       Name of the file
   #       File Contents.
   #  Return:
   #      nonzero - success.
   #      0       - failure and $! has an errno.
   #
   sub InstallFile {
   
       my ($Filename, $Contents) = @_;
       my $TempFile = $Filename.".tmp";
   
       #  Open the file for write:
   
       my $fh = IO::File->new("> $TempFile"); # Write to temp.
       if(!(defined $fh)) {
    &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
    return 0;
       }
       #  write the contents of the file:
   
       print $fh ($Contents); 
       $fh->close; # In case we ever have a filesystem w. locking
   
       chmod(0660, $TempFile);
   
       # Now we can move install the file in position.
       
       move($TempFile, $Filename);
   
       return 1;
   }
   
   
   #
   #   ConfigFileFromSelector: converts a configuration file selector
   #                 (one of host or domain at this point) into a 
   #                 configuration file pathname.
   #
   #  Parameters:
   #      selector  - Configuration file selector.
   #  Returns:
   #      Full path to the file or undef if the selector is invalid.
   #
   sub ConfigFileFromSelector {
       my $selector   = shift;
       my $tablefile;
   
       my $tabledir = $perlvar{'lonTabDir'}.'/';
       if ($selector eq "hosts") {
    $tablefile = $tabledir."hosts.tab";
       } elsif ($selector eq "domain") {
    $tablefile = $tabledir."domain.tab";
       } else {
    return undef;
       }
       return $tablefile;
   
   }
   #
   #   PushFile:  Called to do an administrative push of a file.
   #              - Ensure the file being pushed is one we support.
   #              - Backup the old file to <filename.saved>
   #              - Separate the contents of the new file out from the
   #                rest of the request.
   #              - Write the new file.
   #  Parameter:
   #     Request - The entire user request.  This consists of a : separated
   #               string pushfile:tablename:contents.
   #     NOTE:  The contents may have :'s in it as well making things a bit
   #            more interesting... but not much.
   #  Returns:
   #     String to send to client ("ok" or "refused" if bad file).
   #
   sub PushFile {
       my $request = shift;    
       my ($command, $filename, $contents) = split(":", $request, 3);
       
       #  At this point in time, pushes for only the following tables are
       #  supported:
       #   hosts.tab  ($filename eq host).
       #   domain.tab ($filename eq domain).
       # Construct the destination filename or reject the request.
       #
       # lonManage is supposed to ensure this, however this session could be
       # part of some elaborate spoof that managed somehow to authenticate.
       #
   
   
       my $tablefile = ConfigFileFromSelector($filename);
       if(! (defined $tablefile)) {
    return "refused";
       }
       #
       # >copy< the old table to the backup table
       #        don't rename in case system crashes/reboots etc. in the time
       #        window between a rename and write.
       #
       my $backupfile = $tablefile;
       $backupfile    =~ s/\.tab$/.old/;
       if(!CopyFile($tablefile, $backupfile)) {
    &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
    return "error:$!";
       }
       &logthis('<font color="green"> Pushfile: backed up '
       .$tablefile." to $backupfile</font>");
       
       #  If the file being pushed is the host file, we adjust the entry for ourself so that the
       #  IP will be our current IP as looked up in dns.  Note this is only 99% good as it's possible
       #  to conceive of conditions where we don't have a DNS entry locally.  This is possible in a 
       #  network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
       #  that possibilty.
   
       if($filename eq "host") {
    $contents = AdjustHostContents($contents);
       }
   
       #  Install the new file:
   
       if(!InstallFile($tablefile, $contents)) {
    &logthis('<font color="red"> Pushfile: unable to install '
    .$tablefile." $! </font>");
    return "error:$!";
       } else {
    &logthis('<font color="green"> Installed new '.$tablefile
    ."</font>");
   
       }
   
   
       #  Indicate success:
    
       return "ok";
   
   }
   
   #
   #  Called to re-init either lonc or lond.
   #
   #  Parameters:
   #    request   - The full request by the client.  This is of the form
   #                reinit:<process>  
   #                where <process> is allowed to be either of 
   #                lonc or lond
   #
   #  Returns:
   #     The string to be sent back to the client either:
   #   ok         - Everything worked just fine.
   #   error:why  - There was a failure and why describes the reason.
   #
   #
   sub ReinitProcess {
       my $request = shift;
   
   
       # separate the request (reinit) from the process identifier and
       # validate it producing the name of the .pid file for the process.
       #
       #
       my ($junk, $process) = split(":", $request);
       my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
       if($process eq 'lonc') {
    $processpidfile = $processpidfile."lonc.pid";
    if (!open(PIDFILE, "< $processpidfile")) {
       return "error:Open failed for $processpidfile";
    }
    my $loncpid = <PIDFILE>;
    close(PIDFILE);
    logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
    ."</font>");
    kill("USR2", $loncpid);
       } elsif ($process eq 'lond') {
    logthis('<font color="red"> Reinitializing self (lond) </font>');
    &UpdateHosts; # Lond is us!!
       } else {
    &logthis('<font color="yellow" Invalid reinit request for '.$process
    ."</font>");
    return "error:Invalid process identifier $process";
       }
       return 'ok';
   }
   #   Validate a line in a configuration file edit script:
   #   Validation includes:
   #     - Ensuring the command is valid.
   #     - Ensuring the command has sufficient parameters
   #   Parameters:
   #     scriptline - A line to validate (\n has been stripped for what it's worth).
   #
   #   Return:
   #      0     - Invalid scriptline.
   #      1     - Valid scriptline
   #  NOTE:
   #     Only the command syntax is checked, not the executability of the
   #     command.
   #
   sub isValidEditCommand {
       my $scriptline = shift;
   
       #   Line elements are pipe separated:
   
       my ($command, $key, $newline)  = split(/\|/, $scriptline);
       &logthis('<font color="green"> isValideditCommand checking: '.
        "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
       
       if ($command eq "delete") {
    #
    #   key with no newline.
    #
    if( ($key eq "") || ($newline ne "")) {
       return 0; # Must have key but no newline.
    } else {
       return 1; # Valid syntax.
    }
       } elsif ($command eq "replace") {
    #
    #   key and newline:
    #
    if (($key eq "") || ($newline eq "")) {
       return 0;
    } else {
       return 1;
    }
       } elsif ($command eq "append") {
    if (($key ne "") && ($newline eq "")) {
       return 1;
    } else {
       return 0;
    }
       } else {
    return 0; # Invalid command.
       }
       return 0; # Should not get here!!!
   }
   #
   #   ApplyEdit - Applies an edit command to a line in a configuration 
   #               file.  It is the caller's responsiblity to validate the
   #               edit line.
   #   Parameters:
   #      $directive - A single edit directive to apply.  
   #                   Edit directives are of the form:
   #                  append|newline      - Appends a new line to the file.
   #                  replace|key|newline - Replaces the line with key value 'key'
   #                  delete|key          - Deletes the line with key value 'key'.
   #      $editor   - A config file editor object that contains the
   #                  file being edited.
   #
   sub ApplyEdit {
   
       my ($directive, $editor) = @_;
   
       # Break the directive down into its command and its parameters
       # (at most two at this point.  The meaning of the parameters, if in fact
       #  they exist depends on the command).
   
       my ($command, $p1, $p2) = split(/\|/, $directive);
   
       if($command eq "append") {
    $editor->Append($p1);          # p1 - key p2 null.
       } elsif ($command eq "replace") {
    $editor->ReplaceLine($p1, $p2);   # p1 - key p2 = newline.
       } elsif ($command eq "delete") {
    $editor->DeleteLine($p1);         # p1 - key p2 null.
       } else {          # Should not get here!!!
    die "Invalid command given to ApplyEdit $command"
       }
   }
   #
   # AdjustOurHost:
   #           Adjusts a host file stored in a configuration file editor object
   #           for the true IP address of this host. This is necessary for hosts
   #           that live behind a firewall.
   #           Those hosts have a publicly distributed IP of the firewall, but
   #           internally must use their actual IP.  We assume that a given
   #           host only has a single IP interface for now.
   # Formal Parameters:
   #     editor   - The configuration file editor to adjust.  This
   #                editor is assumed to contain a hosts.tab file.
   # Strategy:
   #    - Figure out our hostname.
   #    - Lookup the entry for this host.
   #    - Modify the line to contain our IP
   #    - Do a replace for this host.
   sub AdjustOurHost {
       my $editor        = shift;
   
       # figure out who I am.
   
       my $myHostName    = $perlvar{'lonHostID'}; # LonCAPA hostname.
   
       #  Get my host file entry.
   
       my $ConfigLine    = $editor->Find($myHostName);
       if(! (defined $ConfigLine)) {
    die "AdjustOurHost - no entry for me in hosts file $myHostName";
       }
       # figure out my IP:
       #   Use the config line to get my hostname.
       #   Use gethostbyname to translate that into an IP address.
       #
       my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
       my $BinaryIp = gethostbyname($name);
       my $ip       = inet_ntoa($ip);
       #
       #  Reassemble the config line from the elements in the list.
       #  Note that if the loncnew items were not present before, they will
       #  be now even if they would be empty
       #
       my $newConfigLine = $id;
       foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
    $newConfigLine .= ":".$item;
       }
       #  Replace the line:
   
       $editor->ReplaceLine($id, $newConfigLine);
       
   }
   #
   #   ReplaceConfigFile:
   #              Replaces a configuration file with the contents of a
   #              configuration file editor object.
   #              This is done by:
   #              - Copying the target file to <filename>.old
   #              - Writing the new file to <filename>.tmp
   #              - Moving <filename.tmp>  -> <filename>
   #              This laborious process ensures that the system is never without
   #              a configuration file that's at least valid (even if the contents
   #              may be dated).
   #   Parameters:
   #        filename   - Name of the file to modify... this is a full path.
   #        editor     - Editor containing the file.
   #
   sub ReplaceConfigFile {
       
       my ($filename, $editor) = @_;
   
       CopyFile ($filename, $filename.".old");
   
       my $contents  = $editor->Get(); # Get the contents of the file.
   
       InstallFile($filename, $contents);
   }
   #   
   #
   #   Called to edit a configuration table  file
   #   Parameters:
   #      request           - The entire command/request sent by lonc or lonManage
   #   Return:
   #      The reply to send to the client.
   #
   sub EditFile {
       my $request = shift;
   
       #  Split the command into it's pieces:  edit:filetype:script
   
       my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
   
       #  Check the pre-coditions for success:
   
       if($request != "edit") { # Something is amiss afoot alack.
    return "error:edit request detected, but request != 'edit'\n";
       }
       if( ($filetype ne "hosts")  &&
    ($filetype ne "domain")) {
    return "error:edit requested with invalid file specifier: $filetype \n";
       }
   
       #   Split the edit script and check it's validity.
   
       my @scriptlines = split(/\n/, $script);  # one line per element.
       my $linecount   = scalar(@scriptlines);
       for(my $i = 0; $i < $linecount; $i++) {
    chomp($scriptlines[$i]);
    if(!isValidEditCommand($scriptlines[$i])) {
       return "error:edit with bad script line: '$scriptlines[$i]' \n";
    }
       }
   
       #   Execute the edit operation.
       #   - Create a config file editor for the appropriate file and 
       #   - execute each command in the script:
       #
       my $configfile = ConfigFileFromSelector($filetype);
       if (!(defined $configfile)) {
    return "refused\n";
       }
       my $editor = ConfigFileEdit->new($configfile);
   
       for (my $i = 0; $i < $linecount; $i++) {
    ApplyEdit($scriptlines[$i], $editor);
       }
       # If the file is the host file, ensure that our host is
       # adjusted to have our ip:
       #
       if($filetype eq "host") {
    AdjustOurHost($editor);
       }
       #  Finally replace the current file with our file.
       #
       ReplaceConfigFile($configfile, $editor);
   
       return "ok\n";
   }
   
   #---------------------------------------------------------------
   #
   # Manipulation of hash based databases (factoring out common code
   # for later use as we refactor.
 #  #
 #  Ties a domain level resource file to a hash.  #  Ties a domain level resource file to a hash.
 #  If requested a history entry is created in the associated hist file.  #  If requested a history entry is created in the associated hist file.
Line 178  sub isClient { Line 988  sub isClient {
 #    Reference to a hash bound to the db file or alternatively undef  #    Reference to a hash bound to the db file or alternatively undef
 #    if the tie failed.  #    if the tie failed.
 #  #
 sub TieDomainHash {  sub tie_domain_hash {
     my $domain    = shift;      my ($domain,$namespace,$how,$loghead,$logtail) = @_;
     my $namespace = shift;      
     my $how       = shift;  
   
     # Filter out any whitespace in the domain name:      # Filter out any whitespace in the domain name:
       
     $domain =~ s/\W//g;      $domain =~ s/\W//g;
       
     # We have enough to go on to tie the hash:      # We have enough to go on to tie the hash:
       
     my $UserTopDir   = $perlvar('lonUsersDir');      my $user_top_dir   = $perlvar{'lonUsersDir'};
     my $DomainDir    = $UserTopDir."/$domain";      my $domain_dir     = $user_top_dir."/$domain";
     my $ResourceFile = $DomainDir."/$namespace.db";      my $resource_file  = $domain_dir."/$namespace.db";
     my %hash;      my %hash;
     if(tie(%hash, 'GDBM_File', $ResourceFile, $how, 0640)) {      if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
  if (scalar @_) { # Need to log the operation.   if (defined($loghead)) { # Need to log the operation.
     my $logFh = IO::File->new(">>$DomainDir/$namespace.hist");      my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
     if($logFH) {      if($logFh) {
  my $TimeStamp = time;   my $timestamp = time;
  my ($loghead, $logtail) = @_;   print $logFh "$loghead:$timestamp:$logtail\n";
  print $logFH "$loghead:$TimeStamp:$logtail\n";  
     }      }
       $logFh->close;
  }   }
  return \%hash; # Return the tied hash.   return \%hash; # Return the tied hash.
     }      } else {
     else {  
  return undef; # Tie failed.   return undef; # Tie failed.
     }      }
 }  }
Line 228  sub TieDomainHash { Line 1035  sub TieDomainHash {
 #   hash to which the database is tied.  It's up to the caller to untie.  #   hash to which the database is tied.  It's up to the caller to untie.
 #   undef if the has could not be tied.  #   undef if the has could not be tied.
 #  #
 sub TieUserHash {  sub tie_user_hash {
   my $domain      = shift;      my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
   my $user        = shift;  
   my $namespace   = shift;  
   my $how         = shift;  
   
   $namespace=~s/\//\_/g; # / -> _  
   $namespace=~s/\W//g; # whitespace eliminated.  
   my $proname     = propath($domain, $user);  
   
   # If this is a namespace for which a history is kept,  
   # make the history log entry:  
   
   
   unless ($namespace =~/^nohist\_/ && (scalar @_ > 0)) {  
     my $hfh = IO::File->new(">>$proname/$namespace.hist");   
     if($hfh) {  
       my $now = time;  
       my $loghead  = shift;  
       my $what    = shift;  
       print $hfh "$loghead:$now:$what\n";  
     }  
   }  
   #  Tie the database.  
   
   my %hash;  
   if(tie(%hash, 'GDBM_FILE', "$proname/$namespace.db",  
  $how, 0640)) {  
     return \%hash;  
   }  
   else {  
     return undef;  
   }  
     
 }  
   
 #  
 #   Get a Request:  
 #   Gets a Request message from the client.  The transaction  
 #   is defined as a 'line' of text.  We remove the new line  
 #   from the text line.    
 #     
 sub GetRequest {  
     my $input = <$client>;  
     chomp($input);  
   
     Debug("Request = $input\n");  
   
     &status('Processing '.$clientname.':'.$input);  
   
     return $input;      $namespace=~s/\//\_/g; # / -> _
 }      $namespace=~s/\W//g; # whitespace eliminated.
 #      my $proname     = propath($domain, $user);
 #   Decipher encoded traffic  
 #  Parameters:  
 #     input      - Encoded data.  
 #  Returns:  
 #     Decoded data or undef if encryption key was not yet negotiated.  
 #  Implicit input:  
 #     cipher  - This global holds the negotiated encryption key.  
 #  
 sub Decipher {  
     my $input  = shift;  
     my $output = '';  
      
         
     if($cipher) {      #  Tie the database.
  my($enc, $enclength, $encinput) = split(/:/, $input);      
  for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {      my %hash;
     $output .=       if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",
  $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));     $how, 0640)) {
    # If this is a namespace for which a history is kept,
    # make the history log entry:    
    if (($namespace !~/^nohist\_/) && (defined($loghead))) {
       my $args = scalar @_;
       Debug(" Opening history: $namespace $args");
       my $hfh = IO::File->new(">>$proname/$namespace.hist"); 
       if($hfh) {
    my $now = time;
    print $hfh "$loghead:$now:$what\n";
       }
       $hfh->close;
  }   }
  return substr($output, 0, $enclength);   return \%hash;
     } else {      } else {
  return undef;   return undef;
     }      }
       
 }  }
   
   #   read_profile
 #  #
 #   Register a command processor.  This function is invoked to register a sub  #   Returns a set of specific entries from a user's profile file.
 #   to process a request.  Once registered, the ProcessRequest sub can automatically  #   this is a utility function that is used by both get_profile_entry and
 #   dispatch requests to an appropriate sub, and do the top level validity checking  #   get_profile_entry_encrypted.
 #   as well:  
 #    - Is the keyword recognized.  
 #    - Is the proper client type attempting the request.  
 #    - Is the request encrypted if it has to be.  
 #   Parameters:  
 #    $RequestName         - Name of the request being registered.  
 #                           This is the command request that will match  
 #                           against the hash keywords to lookup the information  
 #                           associated with the dispatch information.  
 #    $Procedure           - Reference to a sub to call to process the request.  
 #                           All subs get called as follows:  
 #                             Procedure($cmd, $tail, $replyfd, $key)  
 #                             $cmd    - the actual keyword that invoked us.  
 #                             $tail   - the tail of the request that invoked us.  
 #                             $replyfd- File descriptor connected to the client  
 #    $MustEncode          - True if the request must be encoded to be good.  
 #    $ClientOk            - True if it's ok for a client to request this.  
 #    $ManagerOk           - True if it's ok for a manager to request this.  
 # Side effects:  
 #      - On success, the Dispatcher hash has an entry added for the key $RequestName  
 #      - On failure, the program will die as it's a bad internal bug to try to   
 #        register a duplicate command handler.  
 #  #
 sub RegisterHandler {  # Parameters:
     my $RequestName    = shift;  #    udom       - Domain in which the user exists.
     my $Procedure      = shift;  #    uname      - User's account name (loncapa account)
     my $MustEncode     = shift;  #    namespace  - The profile namespace to open.
     my $ClientOk       = shift;  #    what       - A set of & separated queries.
     my $ManagerOk      = shift;  # Returns:
      #    If all ok: - The string that needs to be shipped back to the user.
     #  Don't allow duplication#  #    If failure - A string that starts with error: followed by the failure
      #                 reason.. note that this probabyl gets shipped back to the
     if (defined $Dispatcher{$RequestName}) {  #                 user as well.
  die "Attempting to define a duplicate request handler for $RequestName\n";  #
     }  sub read_profile {
     #   Build the client type mask:      my ($udom, $uname, $namespace, $what) = @_;
           
     my $ClientTypeMask = 0;      my $hashref = &tie_user_hash($udom, $uname, $namespace,
     if($ClientOk) {   &GDBM_READER());
  $ClientTypeMask  |= $CLIENT_OK;      if ($hashref) {
     }          my @queries=split(/\&/,$what);
     if($ManagerOk) {          my $qresult='';
  $ClientTypeMask  |= $MANAGER_OK;  
    for (my $i=0;$i<=$#queries;$i++) {
       $qresult.="$hashref->{$queries[$i]}&";    # Presumably failure gives empty string.
    }
    $qresult=~s/\&$//;              # Remove trailing & from last lookup.
    if (untie %$hashref) {
       return $qresult;
    } else {
       return "error: ".($!+0)." untie (GDBM) Failed";
    }
       } else {
    if ($!+0 == 2) {
       return "error:No such file or GDBM reported bad block error";
    } else {
       return "error: ".($!+0)." tie (GDBM) Failed";
    }
     }      }
      
     #  Enter the hash:  
         
     my @entry = ($Procedure, $MustEncode, $ClientTypeMask);  
      
     $Dispatcher{$RequestName} = \@entry;  
      
      
 }  
   
   }
 #--------------------- Request Handlers --------------------------------------------  #--------------------- Request Handlers --------------------------------------------
 #  #
 #   By convention each request handler registers itself prior to the sub declaration:  #   By convention each request handler registers itself prior to the sub 
   #   declaration:
 #  #
   
   #++
   #
 #  Handles ping requests.  #  Handles ping requests.
 #  Parameters:  #  Parameters:
 #      $cmd    - the actual keyword that invoked us.  #      $cmd    - the actual keyword that invoked us.
Line 382  sub RegisterHandler { Line 1131  sub RegisterHandler {
 #      0       - Program should exit.  #      0       - Program should exit.
 #  Side effects:  #  Side effects:
 #      Reply information is sent to the client.  #      Reply information is sent to the client.
   sub ping_handler {
 sub PingHandler {      my ($cmd, $tail, $client) = @_;
     my $cmd    = shift;      Debug("$cmd $tail $client .. $currenthostid:");
     my $tail   = shift;  
     my $client = shift;  
         
     Reply( $client,"$currenthostid\n","$cmd:$tail");      Reply( $client,"$currenthostid\n","$cmd:$tail");
         
     return 1;      return 1;
 }  }
 RegisterHandler("ping", \&PingHandler, 0, 1, 1);       # Ping unencoded, client or manager.  &register_handler("ping", \&ping_handler, 0, 1, 1);       # Ping unencoded, client or manager.
   
   #++
   #
   # Handles pong requests.  Pong replies with our current host id, and
   #                         the results of a ping sent to us via our lonc.
 #  #
 # Handles pong reequests:  
 # Parameters:  # Parameters:
 #      $cmd    - the actual keyword that invoked us.  #      $cmd    - the actual keyword that invoked us.
 #      $tail   - the tail of the request that invoked us.  #      $tail   - the tail of the request that invoked us.
Line 407  RegisterHandler("ping", \&PingHandler, 0 Line 1158  RegisterHandler("ping", \&PingHandler, 0
 #      0       - Program should exit.  #      0       - Program should exit.
 #  Side effects:  #  Side effects:
 #      Reply information is sent to the client.  #      Reply information is sent to the client.
   sub pong_handler {
 sub PongHandler {      my ($cmd, $tail, $replyfd) = @_;
     my $cmd     = shift;  
     my $tail    = shift;  
     my $replyfd = shift;  
   
     my $reply=&reply("ping",$clientname);      my $reply=&reply("ping",$clientname);
     Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");       &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail"); 
     return 1;      return 1;
 }  }
 RegisterHandler("pong", \&PongHandler, 0, 1, 1);       # Pong unencoded, client or manager  &register_handler("pong", \&pong_handler, 0, 1, 1);       # Pong unencoded, client or manager
   
 #  #++
 #   EstablishKeyHandler:  
 #      Called to establish an encrypted session key with the remote client.  #      Called to establish an encrypted session key with the remote client.
 #  #      Note that with secure lond, in most cases this function is never
   #      invoked.  Instead, the secure session key is established either
   #      via a local file that's locked down tight and only lives for a short
   #      time, or via an ssl tunnel...and is generated from a bunch-o-random
   #      bits from /dev/urandom, rather than the predictable pattern used by
   #      by this sub.  This sub is only used in the old-style insecure
   #      key negotiation.
 # Parameters:  # Parameters:
 #      $cmd    - the actual keyword that invoked us.  #      $cmd    - the actual keyword that invoked us.
 #      $tail   - the tail of the request that invoked us.  #      $tail   - the tail of the request that invoked us.
Line 438  RegisterHandler("pong", \&PongHandler, 0 Line 1191  RegisterHandler("pong", \&PongHandler, 0
 #      Reply information is sent to the client.  #      Reply information is sent to the client.
 #      $cipher is set with a reference to a new IDEA encryption object.  #      $cipher is set with a reference to a new IDEA encryption object.
 #  #
 sub EstablishKeyHandler {  sub establish_key_handler {
     my $cmd      = shift;      my ($cmd, $tail, $replyfd) = @_;
     my $tail     = shift;  
     my $replyfd  = shift;  
   
     my $buildkey=time.$$.int(rand 100000);      my $buildkey=time.$$.int(rand 100000);
     $buildkey=~tr/1-6/A-F/;      $buildkey=~tr/1-6/A-F/;
Line 454  sub EstablishKeyHandler { Line 1205  sub EstablishKeyHandler {
     $key=substr($key,0,32);      $key=substr($key,0,32);
     my $cipherkey=pack("H32",$key);      my $cipherkey=pack("H32",$key);
     $cipher=new IDEA $cipherkey;      $cipher=new IDEA $cipherkey;
     Reply($replyfd, "$buildkey\n", "$cmd:$tail");       &Reply($replyfd, "$buildkey\n", "$cmd:$tail"); 
         
     return 1;      return 1;
   
 }  }
 RegisterHandler("ekey", \&EstablishKeyHandler, 0, 1,1);  &register_handler("ekey", \&establish_key_handler, 0, 1,1);
   
 #  LoadHandler:  
 #     Handler for the load command.  Returns the current system load average  #     Handler for the load command.  Returns the current system load average
 #     to the requestor.  #     to the requestor.
 #  #
Line 478  RegisterHandler("ekey", \&EstablishKeyHa Line 1228  RegisterHandler("ekey", \&EstablishKeyHa
 #      0       - Program should exit.  #      0       - Program should exit.
 #  Side effects:  #  Side effects:
 #      Reply information is sent to the client.  #      Reply information is sent to the client.
 sub LoadHandler {  sub load_handler {
     my $cmd     = shift;      my ($cmd, $tail, $replyfd) = @_;
     my $tail    = shift;  
     my $replyfd = shift;  
   
    # Get the load average from /proc/loadavg and calculate it as a percentage of     # Get the load average from /proc/loadavg and calculate it as a percentage of
    # the allowed load limit as set by the perl global variable lonLoadLim     # the allowed load limit as set by the perl global variable lonLoadLim
Line 494  sub LoadHandler { Line 1242  sub LoadHandler {
         
     my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};      my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
   
     Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");      &Reply( $replyfd, "$loadpercent\n", "$cmd:$tail");
         
     return 1;      return 1;
 }  }
 RegisterHandler("load", \&LoadHandler, 0, 1, 0);  &register_handler("load", \&load_handler, 0, 1, 0);
   
   
 #  #
 #   Process the userload request.  This sub returns to the client the current  #   Process the userload request.  This sub returns to the client the current
Line 521  RegisterHandler("load", \&LoadHandler, 0 Line 1268  RegisterHandler("load", \&LoadHandler, 0
 #  Implicit outputs:  #  Implicit outputs:
 #     the reply is written to the client.  #     the reply is written to the client.
 #  #
 sub UserLoadHandler {  sub user_load_handler {
     my $cmd     = shift;      my ($cmd, $tail, $replyfd) = @_;
     my $tail    = shift;  
     my $replyfd = shift;  
   
     my $userloadpercent=&userload();      my $userloadpercent=&userload();
     Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");      &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
           
     return 1;      return 1;
 }  }
 RegisterHandler("userload", \&UserLoadHandler, 0, 1, 0);  &register_handler("userload", \&user_load_handler, 0, 1, 0);
   
 #   Process a request for the authorization type of a user:  #   Process a request for the authorization type of a user:
 #   (userauth).  #   (userauth).
Line 546  RegisterHandler("userload", \&UserLoadHa Line 1291  RegisterHandler("userload", \&UserLoadHa
 # Implicit outputs:  # Implicit outputs:
 #    The user authorization type is written to the client.  #    The user authorization type is written to the client.
 #  #
 sub UserAuthorizationType {  sub user_authorization_type {
     my $cmd     = shift;      my ($cmd, $tail, $replyfd) = @_;
     my $tail    = shift;  
     my $replyfd = shift;  
         
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
         
     #  Pull the domain and username out of the command tail.      #  Pull the domain and username out of the command tail.
     # and call GetAuthType to determine the authentication type.      # and call get_auth_type to determine the authentication type.
         
     my ($udom,$uname)=split(/:/,$tail);      my ($udom,$uname)=split(/:/,$tail);
     my $result = GetAuthType($udom, $uname);      my $result = &get_auth_type($udom, $uname);
     if($result eq "nouser") {      if($result eq "nouser") {
  Failure( $replyfd, "unknown_user\n", $userinput);   &Failure( $replyfd, "unknown_user\n", $userinput);
     } else {      } else {
  #   #
  # We only want to pass the second field from GetAuthType   # We only want to pass the second field from get_auth_type
  # for ^krb.. otherwise we'll be handing out the encrypted   # for ^krb.. otherwise we'll be handing out the encrypted
  # password for internals e.g.   # password for internals e.g.
  #   #
  my ($type,$otherinfo) = split(/:/,$result);   my ($type,$otherinfo) = split(/:/,$result);
  if($type =~ /^krb/) {   if($type =~ /^krb/) {
     $type = $result;      $type = $result;
  }   } else {
  Reply( $replyfd, "$type\n", $userinput);              $type .= ':';
           }
    &Reply( $replyfd, "$type\n", $userinput);
     }      }
       
     return 1;      return 1;
 }  }
 RegisterHandler("currentauth", \&UserAuthorizationType, 1, 1, 0);  &register_handler("currentauth", \&user_authorization_type, 1, 1, 0);
 #  
 #   Process a request by a manager to push a hosts or domain table   #   Process a request by a manager to push a hosts or domain table 
 #   to us.  We pick apart the command and pass it on to the subs  #   to us.  We pick apart the command and pass it on to the subs
 #   that already exist to do this.  #   that already exist to do this.
Line 590  RegisterHandler("currentauth", \&UserAut Line 1335  RegisterHandler("currentauth", \&UserAut
 #      0       - Program should exit  #      0       - Program should exit
 # Implicit Output:  # Implicit Output:
 #    a reply is written to the client.  #    a reply is written to the client.
   sub push_file_handler {
 sub PushFileHandler {      my ($cmd, $tail, $client) = @_;
     my $cmd    = shift;  
     my $tail   = shift;  
     my $client = shift;  
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
Line 602  sub PushFileHandler { Line 1344  sub PushFileHandler {
     # the code below is a hook to do further authentication (e.g. to resolve      # the code below is a hook to do further authentication (e.g. to resolve
     # spoofing).      # spoofing).
   
     my $cert = GetCertificate($userinput);      my $cert = &GetCertificate($userinput);
     if(ValidManager($cert)) {       if(&ValidManager($cert)) { 
   
  # Now presumably we have the bona fides of both the peer host and the   # Now presumably we have the bona fides of both the peer host and the
  # process making the request.   # process making the request.
               
  my $reply = PushFile($userinput);   my $reply = &PushFile($userinput);
  Reply($client, "$reply\n", $userinput);   &Reply($client, "$reply\n", $userinput);
   
     } else {      } else {
  Failure( $client, "refused\n", $userinput);   &Failure( $client, "refused\n", $userinput);
     }       } 
       return 1;
   }
   &register_handler("pushfile", \&push_file_handler, 1, 0, 1);
   
   #
   #   du  - list the disk usuage of a directory recursively. 
   #    
   #   note: stolen code from the ls file handler
   #   under construction by Rick Banghart 
   #    .
   # Parameters:
   #    $cmd        - The command that dispatched us (du).
   #    $ududir     - The directory path to list... I'm not sure what this
   #                  is relative as things like ls:. return e.g.
   #                  no_such_dir.
   #    $client     - Socket open on the client.
   # Returns:
   #     1 - indicating that the daemon should not disconnect.
   # Side Effects:
   #   The reply is written to  $client.
   #
   sub du_handler {
       my ($cmd, $ududir, $client) = @_;
       my ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
       my $userinput = "$cmd:$ududir";
   
       if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
    &Failure($client,"refused\n","$cmd:$ududir");
    return 1;
       }
       #  Since $ududir could have some nasties in it,
       #  we will require that ududir is a valid
       #  directory.  Just in case someone tries to
       #  slip us a  line like .;(cd /home/httpd rm -rf*)
       #  etc.
       #
       if (-d $ududir) {
    #  And as Shakespeare would say to make
    #  assurance double sure, 
    # use execute_command to ensure that the command is not executed in
    # a shell that can screw us up.
   
    my $duout = execute_command("du -ks $ududir");
    $duout=~s/[^\d]//g; #preserve only the numbers
    &Reply($client,"$duout\n","$cmd:$ududir");
       } else {
   
    &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir"); 
   
       }
       return 1;
 }  }
 RegisterHandler("pushfile", \&PushFileHandler, 1, 0, 1);  &register_handler("du", \&du_handler, 0, 1, 0);
   
   #
   #   ls  - list the contents of a directory.  For each file in the
   #    selected directory the filename followed by the full output of
   #    the stat function is returned.  The returned info for each
   #    file are separated by ':'.  The stat fields are separated by &'s.
   # Parameters:
   #    $cmd        - The command that dispatched us (ls).
   #    $ulsdir     - The directory path to list... I'm not sure what this
   #                  is relative as things like ls:. return e.g.
   #                  no_such_dir.
   #    $client     - Socket open on the client.
   # Returns:
   #     1 - indicating that the daemon should not disconnect.
   # Side Effects:
   #   The reply is written to  $client.
   #
   sub ls_handler {
       my ($cmd, $ulsdir, $client) = @_;
   
       my $userinput = "$cmd:$ulsdir";
   
       my $obs;
       my $rights;
       my $ulsout='';
       my $ulsfn;
       if (-e $ulsdir) {
    if(-d $ulsdir) {
       if (opendir(LSDIR,$ulsdir)) {
    while ($ulsfn=readdir(LSDIR)) {
       undef $obs, $rights; 
       my @ulsstats=stat($ulsdir.'/'.$ulsfn);
       #We do some obsolete checking here
       if(-e $ulsdir.'/'.$ulsfn.".meta") { 
    open(FILE, $ulsdir.'/'.$ulsfn.".meta");
    my @obsolete=<FILE>;
    foreach my $obsolete (@obsolete) {
       if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; } 
       if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
    }
       }
       $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
       if($obs eq '1') { $ulsout.="&1"; }
       else { $ulsout.="&0"; }
       if($rights eq '1') { $ulsout.="&1:"; }
       else { $ulsout.="&0:"; }
    }
    closedir(LSDIR);
       }
    } else {
       my @ulsstats=stat($ulsdir);
       $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
    }
       } else {
    $ulsout='no_such_dir';
       }
       if ($ulsout eq '') { $ulsout='empty'; }
       &Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
       
       return 1;
   
   }
   &register_handler("ls", \&ls_handler, 0, 1, 0);
   
 #   Process a reinit request.  Reinit requests that either  #   Process a reinit request.  Reinit requests that either
 #   lonc or lond be reinitialized so that an updated   #   lonc or lond be reinitialized so that an updated 
Line 633  RegisterHandler("pushfile", \&PushFileHa Line 1487  RegisterHandler("pushfile", \&PushFileHa
 #  Implicit output:  #  Implicit output:
 #     a reply is sent to the client.  #     a reply is sent to the client.
 #  #
 sub ReinitProcessHandler {  sub reinit_process_handler {
     my $cmd    = shift;      my ($cmd, $tail, $client) = @_;
     my $tail   = shift;  
     my $client = shift;  
         
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
         
     my $cert = GetCertificate($userinput);      my $cert = &GetCertificate($userinput);
     if(ValidManager($cert)) {      if(&ValidManager($cert)) {
  chomp($userinput);   chomp($userinput);
  my $reply = ReinitProcess($userinput);   my $reply = &ReinitProcess($userinput);
  Reply( $client,  "$reply\n", $userinput);   &Reply( $client,  "$reply\n", $userinput);
     } else {      } else {
  Failure( $client, "refused\n", $userinput);   &Failure( $client, "refused\n", $userinput);
     }      }
     return 1;      return 1;
 }  }
   &register_handler("reinit", \&reinit_process_handler, 1, 0, 1);
 RegisterHandler("reinit", \&ReinitProcessHandler, 1, 0, 1);  
   
 #  Process the editing script for a table edit operation.  #  Process the editing script for a table edit operation.
 #  the editing operation must be encrypted and requested by  #  the editing operation must be encrypted and requested by
Line 667  RegisterHandler("reinit", \&ReinitProces Line 1518  RegisterHandler("reinit", \&ReinitProces
 #  Implicit output:  #  Implicit output:
 #     a reply is sent to the client.  #     a reply is sent to the client.
 #  #
 sub EditTableHandler {  sub edit_table_handler {
     my $command    = shift;      my ($command, $tail, $client) = @_;
     my $tail       = shift;  
     my $client     = shift;  
         
     my $userinput = "$command:$tail";      my $userinput = "$command:$tail";
   
     my $cert = GetCertificate($userinput);      my $cert = &GetCertificate($userinput);
     if(ValidManager($cert)) {      if(&ValidManager($cert)) {
  my($filetype, $script) = split(/:/, $tail);   my($filetype, $script) = split(/:/, $tail);
  if (($filetype eq "hosts") ||    if (($filetype eq "hosts") || 
     ($filetype eq "domain")) {      ($filetype eq "domain")) {
     if($script ne "") {      if($script ne "") {
  Reply($client,              # BUGBUG - EditFile   &Reply($client,              # BUGBUG - EditFile
       EditFile($userinput), #   could fail.        &EditFile($userinput), #   could fail.
       $userinput);        $userinput);
     } else {      } else {
  Failure($client,"refused\n",$userinput);   &Failure($client,"refused\n",$userinput);
     }      }
  } else {   } else {
     Failure($client,"refused\n",$userinput);      &Failure($client,"refused\n",$userinput);
  }   }
     } else {      } else {
  Failure($client,"refused\n",$userinput);   &Failure($client,"refused\n",$userinput);
     }      }
     return 1;      return 1;
 }  }
 RegisterHandler("edit", \&EditTableHandler, 1, 0, 1);  &register_handler("edit", \&edit_table_handler, 1, 0, 1);
   
   
 #  #
 #   Authenticate a user against the LonCAPA authentication  #   Authenticate a user against the LonCAPA authentication
Line 721  RegisterHandler("edit", \&EditTableHandl Line 1569  RegisterHandler("edit", \&EditTableHandl
 #    The authentication systems describe above have their own forms of implicit  #    The authentication systems describe above have their own forms of implicit
 #    input into the authentication process that are described above.  #    input into the authentication process that are described above.
 #  #
 sub AuthenticateHandler {  sub authenticate_handler {
     my $cmd        = shift;      my ($cmd, $tail, $client) = @_;
     my $tail       = shift;  
     my $client     = shift;      
      
     #  Regenerate the full input line       #  Regenerate the full input line 
          
     my $userinput  = $cmd.":".$tail;      my $userinput  = $cmd.":".$tail;
       
     #  udom    - User's domain.      #  udom    - User's domain.
     #  uname   - Username.      #  uname   - Username.
     #  upass   - User's password.      #  upass   - User's password.
          
     my ($udom,$uname,$upass)=split(/:/,$tail);      my ($udom,$uname,$upass)=split(/:/,$tail);
     Debug(" Authenticate domain = $udom, user = $uname, password = $upass");      &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");
     chomp($upass);      chomp($upass);
     $upass=unescape($upass);      $upass=&unescape($upass);
   
     # Fetch the user authentication information:      my $pwdcorrect = &validate_user($udom, $uname, $upass);
          if($pwdcorrect) {
     my $realpasswd = GetAuthType($udom, $uname);   &Reply( $client, "authorized\n", $userinput);
     if($realpasswd ne "nouser") { # nouser means no passwd file.  
  my ($howpwd,$contentpwd)=split(/:/,$realpasswd);  
  my $pwdcorrect=0;  
  #  
  #   Authenticate against password stored in the internal file.  
  #  
  Debug("Authenticating via $howpwd");  
  if ($howpwd eq 'internal') {  
     &Debug("Internal auth");  
     $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);  
     #  
     #   Authenticate against the unix password file.  
     #  
  } elsif ($howpwd eq 'unix') {  
     &Debug("Unix auth");  
     if((getpwnam($uname))[1] eq "") { #no such user!  
  $pwdcorrect = 0;  
     } else {  
  $contentpwd=(getpwnam($uname))[1];  
  my $pwauth_path="/usr/local/sbin/pwauth";  
  unless ($contentpwd eq 'x') { # Not in shadow file.  
     $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);  
  } elsif (-e $pwauth_path) { # In shadow file so  
     open PWAUTH, "|$pwauth_path" or # use external program  
  die "Cannot invoke authentication";  
     print PWAUTH "$uname\n$upass\n";  
     close PWAUTH;  
     $pwdcorrect=!$?;  
  }  
     }  
     #  
     #   Authenticate against a Kerberos 4 server:  
     #  
  } elsif ($howpwd eq 'krb4') {  
     my $null=pack("C",0);  
     unless ($upass=~/$null/) {  
  my $krb4_error = &Authen::Krb4::get_pw_in_tkt($uname,  
       "",  
       $contentpwd,  
       'krbtgt',  
       $contentpwd,  
       1,  
       $upass);  
  if (!$krb4_error) {  
     $pwdcorrect = 1;  
  } else {   
     $pwdcorrect=0;   
     # log error if it is not a bad password  
     if ($krb4_error != 62) {  
  &logthis('krb4:'.$uname.','.$contentpwd.','.  
  &Authen::Krb4::get_err_txt($Authen::Krb4::error));  
     }  
  }  
     }  
     #  
     #   Authenticate against a Kerberos 5 server:  
     #  
  } elsif ($howpwd eq 'krb5') {  
     my $null=pack("C",0);  
     unless ($upass=~/$null/) {  
  my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);  
  my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;  
  my $krbserver=&Authen::Krb5::parse_name($krbservice);  
  my $credentials=&Authen::Krb5::cc_default();  
  $credentials->initialize($krbclient);  
  my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,  
  $krbserver,  
  $upass,  
  $credentials);  
  $pwdcorrect = ($krbreturn == 1);  
     } else {   
  $pwdcorrect=0;   
     }  
     #  
     #  Finally, the user may have written in an authentication module.  
     #  in that case, if requested, authenticate against it.  
     #  
  } elsif ($howpwd eq 'localauth') {  
     $pwdcorrect=&localauth::localauth($uname,$upass,$contentpwd);  
  }  
  #   #
  #   Successfully authorized.   #  Bad credentials: Failed to authorize
  #   #
  if ($pwdcorrect) {  
     Reply( $client, "authorized\n", $userinput);  
     #  
     #  Bad credentials: Failed to authorize  
     #  
  } else {  
     Failure( $client, "non_authorized\n", $userinput);  
  }  
  #  Used to be unknown_user but that allows crackers to   
  #  distinguish between bad username and bad password so...  
  #    
     } else {      } else {
  Failure( $client, "non_authorized\n", $userinput);   &Failure( $client, "non_authorized\n", $userinput);
     }      }
   
     return 1;      return 1;
 }  }
 RegisterHandler("auth", \&AuthenticateHandler, 1, 1, 0);  &register_handler("auth", \&authenticate_handler, 1, 1, 0);
   
 #  #
 #   Change a user's password.  Note that this function is complicated by  #   Change a user's password.  Note that this function is complicated by
Line 864  RegisterHandler("auth", \&AuthenticateHa Line 1621  RegisterHandler("auth", \&AuthenticateHa
 # Implicit inputs:  # Implicit inputs:
 #    The authentication systems describe above have their own forms of implicit  #    The authentication systems describe above have their own forms of implicit
 #    input into the authentication process that are described above.  #    input into the authentication process that are described above.
 sub ChangePasswordHandler {  sub change_password_handler {
     my $cmd     = shift;      my ($cmd, $tail, $client) = @_;
     my $tail    = shift;  
     my $client  = shift;  
      
     my $userinput = $cmd.":".$tail;           # Reconstruct client's string.      my $userinput = $cmd.":".$tail;           # Reconstruct client's string.
   
     #      #
Line 878  sub ChangePasswordHandler { Line 1633  sub ChangePasswordHandler {
     #  npass - New password.      #  npass - New password.
         
     my ($udom,$uname,$upass,$npass)=split(/:/,$tail);      my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
     chomp($npass);  
     $upass=&unescape($upass);      $upass=&unescape($upass);
     $npass=&unescape($npass);      $npass=&unescape($npass);
     &Debug("Trying to change password for $uname");      &Debug("Trying to change password for $uname");
     my $realpasswd  = GetAuthType($udom, $uname);  
     if ($realpasswd ne "nouser") {      # First require that the user can be authenticated with their
       # old password:
   
       my $validated = &validate_user($udom, $uname, $upass);
       if($validated) {
    my $realpasswd  = &get_auth_type($udom, $uname); # Defined since authd.
   
  my ($howpwd,$contentpwd)=split(/:/,$realpasswd);   my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
  if ($howpwd eq 'internal') {   if ($howpwd eq 'internal') {
     &Debug("internal auth");      &Debug("internal auth");
     if (crypt($upass,$contentpwd) eq $contentpwd) {      my $salt=time;
  my $salt=time;      $salt=substr($salt,6,2);
  $salt=substr($salt,6,2);      my $ncpass=crypt($npass,$salt);
  my $ncpass=crypt($npass,$salt);      if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
  if(RewritePwFile($udom, $uname, "internal:$ncpass")) {   &logthis("Result of password change for "
     &logthis("Result of password change for "   ."$uname: pwchange_success");
      ."$uname: pwchange_success");   &Reply($client, "ok\n", $userinput);
     Reply($client, "ok\n", $userinput);  
  } else {  
     &logthis("Unable to open $uname passwd "                 
      ."to change password");  
     Failure( $client, "non_authorized\n",$userinput);  
  }  
     } else {      } else {
  Failure($client, "non_authorized\n", $userinput);   &logthis("Unable to open $uname passwd "               
    ."to change password");
    &Failure( $client, "non_authorized\n",$userinput);
     }      }
  } elsif ($howpwd eq 'unix') {   } elsif ($howpwd eq 'unix') {
     # Unix means we have to access /etc/password      # Unix means we have to access /etc/password
     # one way or another.  
     # First: Make sure the current password is  
     #        correct  
     &Debug("auth is unix");      &Debug("auth is unix");
     $contentpwd=(getpwnam($uname))[1];      my $execdir=$perlvar{'lonDaemons'};
     my $pwdcorrect = "0";      &Debug("Opening lcpasswd pipeline");
     my $pwauth_path="/usr/local/sbin/pwauth";      my $pf = IO::File->new("|$execdir/lcpasswd > "
     unless ($contentpwd eq 'x') {     ."$perlvar{'lonDaemons'}"
  $pwdcorrect= (crypt($upass,$contentpwd) eq $contentpwd);     ."/logs/lcpasswd.log");
     } elsif (-e $pwauth_path) {      print $pf "$uname\n$npass\n$npass\n";
  open PWAUTH, "|$pwauth_path" or      close $pf;
     die "Cannot invoke authentication";      my $err = $?;
  print PWAUTH "$uname\n$upass\n";      my $result = ($err>0 ? 'pwchange_failure' : 'ok');
  close PWAUTH;      &logthis("Result of password change for $uname: ".
  &Debug("exited pwauth with $? ($uname,$upass) ");       &lcpasswdstrerror($?));
  $pwdcorrect=($? == 0);      &Reply($client, "$result\n", $userinput);
     }  
     if ($pwdcorrect) {  
  my $execdir=$perlvar{'lonDaemons'};  
  &Debug("Opening lcpasswd pipeline");  
  my $pf = IO::File->new("|$execdir/lcpasswd > "  
        ."$perlvar{'lonDaemons'}"  
        ."/logs/lcpasswd.log");  
  print $pf "$uname\n$npass\n$npass\n";  
  close $pf;  
  my $err = $?;  
  my $result = ($err>0 ? 'pwchange_failure' : 'ok');  
  &logthis("Result of password change for $uname: ".  
  &lcpasswdstrerror($?));  
  Reply($client, "$result\n", $userinput);  
     } else {  
  Reply($client, "non_authorized\n", $userinput);  
     }  
  } else {   } else {
     # this just means that the current password mode is not      # this just means that the current password mode is not
     # one we know how to change (e.g the kerberos auth modes or      # one we know how to change (e.g the kerberos auth modes or
     # locally written auth handler).      # locally written auth handler).
     #      #
     Reply( $client, "auth_mode_error\n", $userinput);      &Failure( $client, "auth_mode_error\n", $userinput);
  }     }  
   
     } else {      } else {
  #  used to be unknonw user but that gives out too much info..   &Failure( $client, "non_authorized\n", $userinput);
  #  so make it the same as if the initial passwd was bad.  
  #  
  Reply( $client, "non_authorized\n", $userinput);  
     }      }
   
     return 1;      return 1;
 }  }
 RegisterHandler("passwd", \&ChangePasswordHandler, 1, 1, 0);  &register_handler("passwd", \&change_password_handler, 1, 1, 0);
   
 #  #
 #   Create a new user.  User in this case means a lon-capa user.  #   Create a new user.  User in this case means a lon-capa user.
Line 971  RegisterHandler("passwd", \&ChangePasswo Line 1707  RegisterHandler("passwd", \&ChangePasswo
 # Implicit inputs:  # Implicit inputs:
 #    The authentication systems describe above have their own forms of implicit  #    The authentication systems describe above have their own forms of implicit
 #    input into the authentication process that are described above.  #    input into the authentication process that are described above.
 sub AddUserHandler {  sub add_user_handler {
     my $cmd     = shift;  
     my $tail    = shift;      my ($cmd, $tail, $client) = @_;
     my $client  = shift;  
   
     my ($udom,$uname,$umode,$npass)=split(/:/,$tail);      my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
     my $userinput = $cmd.":".$tail; # Reconstruct the full request line.      my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
Line 987  sub AddUserHandler { Line 1723  sub AddUserHandler {
  my $oldumask=umask(0077);   my $oldumask=umask(0077);
  chomp($npass);   chomp($npass);
  $npass=&unescape($npass);   $npass=&unescape($npass);
  my $passfilename  = PasswordPath($udom, $uname);   my $passfilename  = &password_path($udom, $uname);
  &Debug("Password file created will be:".$passfilename);   &Debug("Password file created will be:".$passfilename);
  if (-e $passfilename) {   if (-e $passfilename) {
     Failure( $client, "already_exists\n", $userinput);      &Failure( $client, "already_exists\n", $userinput);
  } else {   } else {
     my @fpparts=split(/\//,$passfilename);  
     my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];  
     my $fperror='';      my $fperror='';
     for (my $i=3;$i<= ($#fpparts-1);$i++) {      if (!&mkpath($passfilename)) {
  $fpnow.='/'.$fpparts[$i];    $fperror="error: ".($!+0)." mkdir failed while attempting "
  unless (-e $fpnow) {      ."makeuser";
     unless (mkdir($fpnow,0777)) {  
  $fperror="error: ".($!+0)." mkdir failed while attempting "  
     ."makeuser";  
     }  
  }  
     }      }
     unless ($fperror) {      unless ($fperror) {
  my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);   my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
  Reply($client, $result, $userinput);     #BUGBUG - could be fail   &Reply($client, $result, $userinput);     #BUGBUG - could be fail
     } else {      } else {
  Failure($client, "$fperror\n", $userinput);   &Failure($client, "$fperror\n", $userinput);
     }      }
  }   }
  umask($oldumask);   umask($oldumask);
     }  else {      }  else {
  Failure($client, "not_right_domain\n",   &Failure($client, "not_right_domain\n",
  $userinput); # Even if we are multihomed.   $userinput); # Even if we are multihomed.
           
     }      }
     return 1;      return 1;
   
 }  }
 RegisterHandler("makeuser", \&AddUserHandler, 1, 1, 0);  &register_handler("makeuser", \&add_user_handler, 1, 1, 0);
   
 #  #
 #   Change the authentication method of a user.  Note that this may  #   Change the authentication method of a user.  Note that this may
Line 1044  RegisterHandler("makeuser", \&AddUserHan Line 1773  RegisterHandler("makeuser", \&AddUserHan
 #    The authentication systems describe above have their own forms of implicit  #    The authentication systems describe above have their own forms of implicit
 #    input into the authentication process that are described above.  #    input into the authentication process that are described above.
 #  #
 sub ChangeAuthenticationHandler {  sub change_authentication_handler {
     my $cmd     = shift;  
     my $tail    = shift;      my ($cmd, $tail, $client) = @_;
     my $client  = shift;  
         
     my $userinput  = "$cmd:$tail";              # Reconstruct user input.      my $userinput  = "$cmd:$tail";              # Reconstruct user input.
   
     my ($udom,$uname,$umode,$npass)=split(/:/,$tail);      my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
     &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);      &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
     if ($udom ne $currentdomainid) {      if ($udom ne $currentdomainid) {
  Failure( $client, "not_right_domain\n", $client);   &Failure( $client, "not_right_domain\n", $client);
     } else {      } else {
   
  chomp($npass);   chomp($npass);
   
  $npass=&unescape($npass);   $npass=&unescape($npass);
  my $passfilename = PasswordPath($udom, $uname);   my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
    my $passfilename = &password_path($udom, $uname);
  if ($passfilename) { # Not allowed to create a new user!!   if ($passfilename) { # Not allowed to create a new user!!
     my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);      my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
     Reply($client, $result, $userinput);      #
       #  If the current auth mode is internal, and the old auth mode was
       #  unix, or krb*,  and the user is an author for this domain,
       #  re-run manage_permissions for that role in order to be able
       #  to take ownership of the construction space back to www:www
       #
   
       if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
    (($oldauth =~ /^internal/) && ($umode eq "unix")) ) { 
    if(&is_author($udom, $uname)) {
       &Debug(" Need to manage author permissions...");
       &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
    }
       }
          
   
       &Reply($client, $result, $userinput);
  } else {          } else {       
     Failure($client, "non_authorized", $userinput); # Fail the user now.      &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
  }   }
     }      }
     return 1;      return 1;
 }  }
 RegisterHandler("changeuserauth", \&ChangeAuthenticationHandler, 1,1, 0);  &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
   
 #  #
 #   Determines if this is the home server for a user.  The home server  #   Determines if this is the home server for a user.  The home server
Line 1088  RegisterHandler("changeuserauth", \&Chan Line 1833  RegisterHandler("changeuserauth", \&Chan
 #    The authentication systems describe above have their own forms of implicit  #    The authentication systems describe above have their own forms of implicit
 #    input into the authentication process that are described above.  #    input into the authentication process that are described above.
 #  #
 sub IsHomeHandler {  sub is_home_handler {
     my $cmd     = shift;      my ($cmd, $tail, $client) = @_;
     my $tail    = shift;  
     my $client  = shift;  
         
     my $userinput  = "$cmd:$tail";      my $userinput  = "$cmd:$tail";
         
     my ($udom,$uname)=split(/:/,$tail);      my ($udom,$uname)=split(/:/,$tail);
     chomp($uname);      chomp($uname);
     my $passfile = PasswordPath($udom, $uname);      my $passfile = &password_filename($udom, $uname);
     if($passfile) {      if($passfile) {
  Reply( $client, "found\n", $userinput);   &Reply( $client, "found\n", $userinput);
     } else {      } else {
  Failure($client, "not_found\n", $userinput);   &Failure($client, "not_found\n", $userinput);
     }      }
     return 1;      return 1;
 }  }
 RegisterHandler("home", \&IsHomeHandler, 0,1,0);  &register_handler("home", \&is_home_handler, 0,1,0);
   
 #  #
 #   Process an update request for a resource?? I think what's going on here is  #   Process an update request for a resource?? I think what's going on here is
 #   that a resource has been modified that we hold a subscription to.  #   that a resource has been modified that we hold a subscription to.
Line 1128  RegisterHandler("home", \&IsHomeHandler, Line 1872  RegisterHandler("home", \&IsHomeHandler,
 #    The authentication systems describe above have their own forms of implicit  #    The authentication systems describe above have their own forms of implicit
 #    input into the authentication process that are described above.  #    input into the authentication process that are described above.
 #  #
 sub UpdateResourceHandler {  sub update_resource_handler {
     my $cmd    = shift;  
     my $tail   = shift;      my ($cmd, $tail, $client) = @_;
     my $client = shift;  
         
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
         
     my $fname=$tail;      my $fname= $tail; # This allows interactive testing
   
   
     my $ownership=ishome($fname);      my $ownership=ishome($fname);
     if ($ownership eq 'not_owner') {      if ($ownership eq 'not_owner') {
  if (-e $fname) {   if (-e $fname) {
Line 1177  sub UpdateResourceHandler { Line 1922  sub UpdateResourceHandler {
     rename($transname,$fname);      rename($transname,$fname);
  }   }
     }      }
     Reply( $client, "ok\n", $userinput);      &Reply( $client, "ok\n", $userinput);
  } else {   } else {
     Failure($client, "not_found\n", $userinput);      &Failure($client, "not_found\n", $userinput);
  }   }
     } else {      } else {
  Failure($client, "rejected\n", $userinput);   &Failure($client, "rejected\n", $userinput);
     }      }
     return 1;      return 1;
 }  }
 RegisterHandler("update", \&UpdateResourceHandler, 0 ,1, 0);  &register_handler("update", \&update_resource_handler, 0 ,1, 0);
   
 #  #
 #   Fetch a user file from a remote server:  #   Fetch a user file from a remote server to the user's home directory
   #   userfiles subdir.
 # Parameters:  # Parameters:
 #    $cmd      - The command that got us here.  #    $cmd      - The command that got us here.
 #    $tail     - Tail of the command (remaining parameters).  #    $tail     - Tail of the command (remaining parameters).
Line 1198  RegisterHandler("update", \&UpdateResour Line 1944  RegisterHandler("update", \&UpdateResour
 #     0        - Requested to exit, caller should shut down.  #     0        - Requested to exit, caller should shut down.
 #     1        - Continue processing.  #     1        - Continue processing.
 #  #
 sub FetchUserFileHandler {  sub fetch_user_file_handler {
     my $cmd     = shift;  
     my $tail    = shift;      my ($cmd, $tail, $client) = @_;
     my $client  = shift;  
      
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
     my $fname           = $tail;      my $fname           = $tail;
     my ($udom,$uname,$ufile)=split(/\//,$fname);      my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
     my $udir=propath($udom,$uname).'/userfiles';      my $udir=&propath($udom,$uname).'/userfiles';
     unless (-e $udir) {      unless (-e $udir) {
  mkdir($udir,0770);    mkdir($udir,0770); 
     }      }
       Debug("fetch user file for $fname");
     if (-e $udir) {      if (-e $udir) {
  $ufile=~s/^[\.\~]+//;   $ufile=~s/^[\.\~]+//;
  $ufile=~s/\///g;  
    # IF necessary, create the path right down to the file.
    # Note that any regular files in the way of this path are
    # wiped out to deal with some earlier folly of mine.
   
    if (!&mkpath($udir.'/'.$ufile)) {
       &Failure($client, "unable_to_create\n", $userinput);    
    }
   
  my $destname=$udir.'/'.$ufile;   my $destname=$udir.'/'.$ufile;
  my $transname=$udir.'/'.$ufile.'.in.transit';   my $transname=$udir.'/'.$ufile.'.in.transit';
  my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;   my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
  my $response;   my $response;
    Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
  alarm(120);   alarm(120);
  {   {
     my $ua=new LWP::UserAgent;      my $ua=new LWP::UserAgent;
Line 1228  sub FetchUserFileHandler { Line 1983  sub FetchUserFileHandler {
     unlink($transname);      unlink($transname);
     my $message=$response->status_line;      my $message=$response->status_line;
     &logthis("LWP GET: $message for $fname ($remoteurl)");      &logthis("LWP GET: $message for $fname ($remoteurl)");
     Failure($client, "failed\n", $userinput);      &Failure($client, "failed\n", $userinput);
  } else {   } else {
       Debug("Renaming $transname to $destname");
     if (!rename($transname,$destname)) {      if (!rename($transname,$destname)) {
  &logthis("Unable to move $transname to $destname");   &logthis("Unable to move $transname to $destname");
  unlink($transname);   unlink($transname);
  Failure($client, "failed\n", $userinput);   &Failure($client, "failed\n", $userinput);
     } else {      } else {
  Reply($client, "ok\n", $userinput);   &Reply($client, "ok\n", $userinput);
     }      }
  }      }   
     } else {      } else {
  Failure($client, "not_home\n", $userinput);   &Failure($client, "not_home\n", $userinput);
     }      }
     return 1;      return 1;
 }  }
 RegisterHandler("fetchuserfile", \&FetchUserFileHandler, 0, 1, 0);  &register_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
   
 #  #
 #   Authenticate access to a user file.  Question?   The token for athentication  #   Remove a file from a user's home directory userfiles subdirectory.
 #   is allowed to be sent as cleartext is this really what we want?  This token  # Parameters:
 #   represents the user's session id.  Once it is forged does this allow too much   #    cmd   - the Lond request keyword that got us here.
 #   access??  #    tail  - the part of the command past the keyword.
   #    client- File descriptor connected with the client.
   #
   # Returns:
   #    1    - Continue processing.
   sub remove_user_file_handler {
       my ($cmd, $tail, $client) = @_;
   
       my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
   
       my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
       if ($ufile =~m|/\.\./|) {
    # any files paths with /../ in them refuse 
    # to deal with
    &Failure($client, "refused\n", "$cmd:$tail");
       } else {
    my $udir = &propath($udom,$uname);
    if (-e $udir) {
       my $file=$udir.'/userfiles/'.$ufile;
       if (-e $file) {
    #
    #   If the file is a regular file unlink is fine...
    #   However it's possible the client wants a dir.
    #   removed, in which case rmdir is more approprate:
    #
           if (-f $file){
       unlink($file);
    } elsif(-d $file) {
       rmdir($file);
    }
    if (-e $file) {
       #  File is still there after we deleted it ?!?
   
       &Failure($client, "failed\n", "$cmd:$tail");
    } else {
       &Reply($client, "ok\n", "$cmd:$tail");
    }
       } else {
    &Failure($client, "not_found\n", "$cmd:$tail");
       }
    } else {
       &Failure($client, "not_home\n", "$cmd:$tail");
    }
       }
       return 1;
   }
   &register_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
   
 #  #
   #   make a directory in a user's home directory userfiles subdirectory.
 # Parameters:  # Parameters:
 #    $cmd      - The command that got us here.  #    cmd   - the Lond request keyword that got us here.
 #    $tail     - Tail of the command (remaining parameters).  #    tail  - the part of the command past the keyword.
 #    $client   - File descriptor connected to client.  #    client- File descriptor connected with the client.
 # Returns  #
 #     0        - Requested to exit, caller should shut down.  # Returns:
 #     1        - Continue processing.  #    1    - Continue processing.
 sub AuthenticateUserFileAccess {  sub mkdir_user_file_handler {
     my $cmd       = shift;      my ($cmd, $tail, $client) = @_;
     my $tail      = shift;  
     my $client    = shift;      my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
     my $userinput = "$cmd:$tail";      $dir=&unescape($dir);
       my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
       if ($ufile =~m|/\.\./|) {
    # any files paths with /../ in them refuse 
    # to deal with
    &Failure($client, "refused\n", "$cmd:$tail");
       } else {
    my $udir = &propath($udom,$uname);
    if (-e $udir) {
       my $newdir=$udir.'/userfiles/'.$ufile.'/';
       if (!&mkpath($newdir)) {
    &Failure($client, "failed\n", "$cmd:$tail");
       }
       &Reply($client, "ok\n", "$cmd:$tail");
    } else {
       &Failure($client, "not_home\n", "$cmd:$tail");
    }
       }
       return 1;
   }
   &register_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
   
   #
   #   rename a file in a user's home directory userfiles subdirectory.
   # Parameters:
   #    cmd   - the Lond request keyword that got us here.
   #    tail  - the part of the command past the keyword.
   #    client- File descriptor connected with the client.
   #
   # Returns:
   #    1    - Continue processing.
   sub rename_user_file_handler {
       my ($cmd, $tail, $client) = @_;
   
       my ($udom,$uname,$old,$new) = split(/:/, $tail);
       $old=&unescape($old);
       $new=&unescape($new);
       if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
    # any files paths with /../ in them refuse to deal with
    &Failure($client, "refused\n", "$cmd:$tail");
       } else {
    my $udir = &propath($udom,$uname);
    if (-e $udir) {
       my $oldfile=$udir.'/userfiles/'.$old;
       my $newfile=$udir.'/userfiles/'.$new;
       if (-e $newfile) {
    &Failure($client, "exists\n", "$cmd:$tail");
       } elsif (! -e $oldfile) {
    &Failure($client, "not_found\n", "$cmd:$tail");
       } else {
    if (!rename($oldfile,$newfile)) {
       &Failure($client, "failed\n", "$cmd:$tail");
    } else {
       &Reply($client, "ok\n", "$cmd:$tail");
    }
       }
    } else {
       &Failure($client, "not_home\n", "$cmd:$tail");
    }
       }
       return 1;
   }
   &register_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
   
   #
   #  Authenticate access to a user file by checking that the token the user's 
   #  passed also exists in their session file
   #
   # Parameters:
   #   cmd      - The request keyword that dispatched to tus.
   #   tail     - The tail of the request (colon separated parameters).
   #   client   - Filehandle open on the client.
   # Return:
   #    1.
   sub token_auth_user_file_handler {
       my ($cmd, $tail, $client) = @_;
   
     my ($fname,$session)=split(/:/,$tail);      my ($fname, $session) = split(/:/, $tail);
       
     chomp($session);      chomp($session);
     my $reply='non_auth';      my $reply="non_auth\n";
     if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.$session.'.id')) {      if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
        $session.'.id')) {
  while (my $line=<ENVIN>) {   while (my $line=<ENVIN>) {
     if ($line=~/userfile\.$fname\=/) {       if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply="ok\n"; }
  $reply='ok';   
     }  
  }   }
  close(ENVIN);   close(ENVIN);
  Reply($client, $reply."\n", $userinput);   &Reply($client, $reply, "$cmd:$tail");
     } else {      } else {
  Failure($client, "invalid_token\n", $userinput);   &Failure($client, "invalid_token\n", "$cmd:$tail");
     }      }
     return 1;      return 1;
      
 }  }
 RegisterHandler("tokenauthuserfile", \&AuthenticateUserFileAccess, 0, 1, 0);  &register_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
   
 #  #
 #   Unsubscribe from a resource.  #   Unsubscribe from a resource.
 #  #
Line 1292  RegisterHandler("tokenauthuserfile", \&A Line 2173  RegisterHandler("tokenauthuserfile", \&A
 #     0        - Requested to exit, caller should shut down.  #     0        - Requested to exit, caller should shut down.
 #     1        - Continue processing.  #     1        - Continue processing.
 #  #
 sub UnsubscribeHandler {  sub unsubscribe_handler {
     my $cmd      = shift;      my ($cmd, $tail, $client) = @_;
     my $tail     = shift;  
     my $client   = shift;  
     my $userinput= "$cmd:$tail";      my $userinput= "$cmd:$tail";
           
     my $fname = $tail;      my ($fname) = split(/:/,$tail); # Split in case there's extrs.
   
       &Debug("Unsubscribing $fname");
     if (-e $fname) {      if (-e $fname) {
  Reply($client, &unsub($client,$fname,$clientip), $userinput);   &Debug("Exists");
    &Reply($client, &unsub($fname,$clientip), $userinput);
     } else {      } else {
  Failure($client, "not_found\n", $userinput);   &Failure($client, "not_found\n", $userinput);
     }      }
     return 1;      return 1;
 }  }
 RegisterHandler("unusb", \&UnsubscribeHandler, 0, 1, 0);  &register_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
   
 #   Subscribe to a resource.  #   Subscribe to a resource
 #  #
 # Parameters:  # Parameters:
 #    $cmd      - The command that got us here.  #    $cmd      - The command that got us here.
Line 1318  RegisterHandler("unusb", \&UnsubscribeHa Line 2201  RegisterHandler("unusb", \&UnsubscribeHa
 #     0        - Requested to exit, caller should shut down.  #     0        - Requested to exit, caller should shut down.
 #     1        - Continue processing.  #     1        - Continue processing.
 #  #
 sub SubscribeHandler {  sub subscribe_handler {
     my $cmd        = shift;      my ($cmd, $tail, $client)= @_;
     my $tail       = shift;  
     my $client     = shift;  
     my $userinput  = "$cmd:$tail";      my $userinput  = "$cmd:$tail";
   
     Reply( $client, &subscribe($userinput,$clientip), $userinput);      &Reply( $client, &subscribe($userinput,$clientip), $userinput);
   
     return 1;      return 1;
 }  }
 RegisterHandler("sub", \&SubscribeHandler, 0, 1, 0);  &register_handler("sub", \&subscribe_handler, 0, 1, 0);
   
 #  #
 #   Determine the version of a resource (?) Or is it return  #   Determine the version of a resource (?) Or is it return
Line 1343  RegisterHandler("sub", \&SubscribeHandle Line 2225  RegisterHandler("sub", \&SubscribeHandle
 #     0        - Requested to exit, caller should shut down.  #     0        - Requested to exit, caller should shut down.
 #     1        - Continue processing.  #     1        - Continue processing.
 #  #
 sub CurrentVersionHandler {  sub current_version_handler {
     my $cmd      = shift;      my ($cmd, $tail, $client) = @_;
     my $tail     = shift;  
     my $client   = shift;  
     my $userinput= "$cmd:$tail";      my $userinput= "$cmd:$tail";
         
     my $fname   = $tail;      my $fname   = $tail;
     Reply( $client, &currentversion($fname)."\n", $userinput);      &Reply( $client, &currentversion($fname)."\n", $userinput);
     return 1;      return 1;
   
 }  }
 RegisterHandler("currentversion", \&CurrentVersionHandler, 0, 1, 0);  &register_handler("currentversion", \&current_version_handler, 0, 1, 0);
   
   
 #  Make an entry in a user's activity log.  #  Make an entry in a user's activity log.
 #  #
Line 1367  RegisterHandler("currentversion", \&Curr Line 2247  RegisterHandler("currentversion", \&Curr
 #     0        - Requested to exit, caller should shut down.  #     0        - Requested to exit, caller should shut down.
 #     1        - Continue processing.  #     1        - Continue processing.
 #  #
 sub ActivityLogEntryHandler {  sub activity_log_handler {
     my $cmd      = shift;      my ($cmd, $tail, $client) = @_;
     my $tail     = shift;  
     my $client   = shift;  
     my $userinput= "$cmd:$tail";      my $userinput= "$cmd:$tail";
   
     my ($udom,$uname,$what)=split(/:/,$tail);      my ($udom,$uname,$what)=split(/:/,$tail);
     chomp($what);      chomp($what);
     my $proname=propath($udom,$uname);      my $proname=&propath($udom,$uname);
     my $now=time;      my $now=time;
     my $hfh;      my $hfh;
     if ($hfh=IO::File->new(">>$proname/activity.log")) {       if ($hfh=IO::File->new(">>$proname/activity.log")) { 
  print $hfh "$now:$clientname:$what\n";   print $hfh "$now:$clientname:$what\n";
  Reply( $client, "ok\n", $userinput);    &Reply( $client, "ok\n", $userinput); 
     } else {      } else {
  Failure($client, "error: ".($!+0)." IO::File->new Failed "   &Failure($client, "error: ".($!+0)." IO::File->new Failed "
       ."while attempting log\n",    ."while attempting log\n", 
       $userinput);   $userinput);
     }      }
   
     return 1;      return 1;
 }  }
 RegisterHandler("log", \&ActivityLogEntryHandler, 0, 1, 0);  &register_handler("log", \&activity_log_handler, 0, 1, 0);
   
 #  #
 #   Put a namespace entry in a user profile hash.  #   Put a namespace entry in a user profile hash.
 #   My druthers would be for this to be an encrypted interaction too.  #   My druthers would be for this to be an encrypted interaction too.
Line 1404  RegisterHandler("log", \&ActivityLogEntr Line 2285  RegisterHandler("log", \&ActivityLogEntr
 #     0        - Requested to exit, caller should shut down.  #     0        - Requested to exit, caller should shut down.
 #     1        - Continue processing.  #     1        - Continue processing.
 #  #
 sub PutUserProfileEntry {  sub put_user_profile_entry {
     my $cmd       = shift;      my ($cmd, $tail, $client)  = @_;
     my $tail      = shift;  
     my $client    = shift;  
     my $userinput = "$cmd:$tail";  
   
     my ($udom,$uname,$namespace,$what) =split(/:/,$tail);      my $userinput = "$cmd:$tail";
       
       my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
     if ($namespace ne 'roles') {      if ($namespace ne 'roles') {
        chomp($what);   chomp($what);
        my $hashref = TieUserHash($udom, $uname, $namespace,   my $hashref = &tie_user_hash($udom, $uname, $namespace,
      &GDBM_WRCREAT(),"P",$what);    &GDBM_WRCREAT(),"P",$what);
        if($hashref) {   if($hashref) {
  my @pairs=split(/\&/,$what);      my @pairs=split(/\&/,$what);
  foreach my $pair (@pairs) {      foreach my $pair (@pairs) {
     my ($key,$value)=split(/=/,$pair);   my ($key,$value)=split(/=/,$pair);
     $hashref->{$key}=$value;   $hashref->{$key}=$value;
   }      }
   if (untie(%$hashref)) {      if (untie(%$hashref)) {
      Reply( $client, "ok\n", $userinput);   &Reply( $client, "ok\n", $userinput);
   } else {      } else {
      Failure($client, "error: ".($!+0)." untie(GDBM) failed ".   &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
      "while attempting put\n",    "while attempting put\n", 
      $userinput);   $userinput);
   }      }
        } else {   } else {
   Failure( $client, "error: ".($!)." tie(GDBM) Failed ".      &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
    "while attempting put\n", $userinput);       "while attempting put\n", $userinput);
        }   }
      } else {      } else {
         Failure( $client, "refused\n", $userinput);          &Failure( $client, "refused\n", $userinput);
      }      }
           
      return 1;      return 1;
 }  }
 RegisterHandler("put", \&PutUserProfileEntry, 0, 1, 0);  &register_handler("put", \&put_user_profile_entry, 0, 1, 0);
   
 #   # 
 #   Increment a profile entry in the user history file.  #   Increment a profile entry in the user history file.
Line 1455  RegisterHandler("put", \&PutUserProfileE Line 2335  RegisterHandler("put", \&PutUserProfileE
 #     0        - Requested to exit, caller should shut down.  #     0        - Requested to exit, caller should shut down.
 #     1        - Continue processing.  #     1        - Continue processing.
 #  #
 sub IncrementUserValueHandler {  sub increment_user_value_handler {
     my $cmd         = shift;      my ($cmd, $tail, $client) = @_;
     my $tail        = shift;      
     my $client      = shift;  
     my $userinput   = "$cmd:$tail";      my $userinput   = "$cmd:$tail";
       
     my ($udom,$uname,$namespace,$what) =split(/:/,$tail);      my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
     if ($namespace ne 'roles') {      if ($namespace ne 'roles') {
         chomp($what);          chomp($what);
  my $hashref = TieUserHash($udom, $uname,   my $hashref = &tie_user_hash($udom, $uname,
       $namespace, &GDBM_WRCREAT(),       $namespace, &GDBM_WRCREAT(),
       "P",$what);       "P",$what);
  if ($hashref) {   if ($hashref) {
    my @pairs=split(/\&/,$what);      my @pairs=split(/\&/,$what);
    foreach my $pair (@pairs) {      foreach my $pair (@pairs) {
      my ($key,$value)=split(/=/,$pair);   my ($key,$value)=split(/=/,$pair);
      # We could check that we have a number...   # We could check that we have a number...
      if (! defined($value) || $value eq '') {   if (! defined($value) || $value eq '') {
         $value = 1;      $value = 1;
      }   }
      $hashref->{$key}+=$value;   $hashref->{$key}+=$value;
    }      }
    if (untie(%$hashref)) {      if (untie(%$hashref)) {
       Reply( $client, "ok\n", $userinput);   &Reply( $client, "ok\n", $userinput);
    } else {      } else {
       Failure($client, "error: ".($!+0)." untie(GDBM) failed ".   &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
       "while attempting inc\n", $userinput);   "while attempting inc\n", $userinput);
    }      }
  } else {   } else {
    Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".      &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
    "while attempting inc\n", $userinput);       "while attempting inc\n", $userinput);
  }   }
       } else {      } else {
  Failure($client, "refused\n", $userinput);   &Failure($client, "refused\n", $userinput);
       }      }
           
     return 1;      return 1;
 }  }
 RegisterHandler("inc", \&IncrementUserValueHandler, 0, 1, 0);  &register_handler("inc", \&increment_user_value_handler, 0, 1, 0);
   
 #  #
 #   Put a new role for a user.  Roles are LonCAPA's packaging of permissions.  #   Put a new role for a user.  Roles are LonCAPA's packaging of permissions.
 #   Each 'role' a user has implies a set of permissions.  Adding a new role  #   Each 'role' a user has implies a set of permissions.  Adding a new role
Line 1514  RegisterHandler("inc", \&IncrementUserVa Line 2394  RegisterHandler("inc", \&IncrementUserVa
 #     1         - To continue processing.  #     1         - To continue processing.
 #  #
 #  #
 sub RolesPutHandler {  sub roles_put_handler {
     my $cmd        = shift;      my ($cmd, $tail, $client) = @_;
     my $tail       = shift;  
     my $client     = shift;  
     my $userinput  = "$cmd:$tail";      my $userinput  = "$cmd:$tail";
   
     my ($exedom,$exeuser,$udom,$uname,$what)   =split(/:/,$tail);      my ( $exedom, $exeuser, $udom, $uname,  $what) = split(/:/,$tail);
     &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.      
    "what = ".$what);  
     my $namespace='roles';      my $namespace='roles';
     chomp($what);      chomp($what);
     my $hashref = TieUserHash($udom, $uname, $namespace,      my $hashref = &tie_user_hash($udom, $uname, $namespace,
   &GDBM_WRCREAT(), "P",   &GDBM_WRCREAT(), "P",
   "$exedom:$exeuser:$what");   "$exedom:$exeuser:$what");
     #      #
     #  Log the attempt to set a role.  The {}'s here ensure that the file       #  Log the attempt to set a role.  The {}'s here ensure that the file 
     #  handle is open for the minimal amount of time.  Since the flush      #  handle is open for the minimal amount of time.  Since the flush
     #  is done on close this improves the chances the log will be an un-      #  is done on close this improves the chances the log will be an un-
     #  corrupted ordered thing.      #  corrupted ordered thing.
     if ($hashref) {      if ($hashref) {
    my $pass_entry = &get_auth_type($udom, $uname);
    my ($auth_type,$pwd)  = split(/:/, $pass_entry);
    $auth_type = $auth_type.":";
  my @pairs=split(/\&/,$what);   my @pairs=split(/\&/,$what);
  foreach my $pair (@pairs) {   foreach my $pair (@pairs) {
     my ($key,$value)=split(/=/,$pair);      my ($key,$value)=split(/=/,$pair);
     &ManagePermissions($key, $udom, $uname,      &manage_permissions($key, $udom, $uname,
        &GetAuthType( $udom, $uname));         $auth_type);
     $hashref->{$key}=$value;      $hashref->{$key}=$value;
  }   }
  if (untie($hashref)) {   if (untie($hashref)) {
     Reply($client, "ok\n", $userinput);      &Reply($client, "ok\n", $userinput);
  } else {   } else {
     Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".      &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
      "while attempting rolesput\n", $userinput);       "while attempting rolesput\n", $userinput);
  }   }
     } else {      } else {
  Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".   &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
  "while attempting rolesput\n", $userinput);   "while attempting rolesput\n", $userinput);
     }      }
     return 1;      return 1;
 }  }
 RegisterHandler("rolesput", \&RolesPutHandler, 1,1,0);  # Encoded client only.  &register_handler("rolesput", \&roles_put_handler, 1,1,0);  # Encoded client only.
   
 #  #
 #   Deletes (removes) a role for a user.   This is equivalent to removing  #   Deletes (removes) a role for a user.   This is equivalent to removing
 #  a permissions package associated with the role from the user's profile.  #  a permissions package associated with the role from the user's profile.
Line 1571  RegisterHandler("rolesput", \&RolesPutHa Line 2454  RegisterHandler("rolesput", \&RolesPutHa
 #     1                    - Continue processing  #     1                    - Continue processing
 #     0                    - Exit.  #     0                    - Exit.
 #  #
 sub RolesDeleteHandler {  sub roles_delete_handler {
     my $cmd          = shift;      my ($cmd, $tail, $client)  = @_;
     my $tail         = shift;  
     my $client       = shift;  
     my $userinput    = "$cmd:$tail";      my $userinput    = "$cmd:$tail";
         
     my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);      my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
Line 1582  sub RolesDeleteHandler { Line 2464  sub RolesDeleteHandler {
    "what = ".$what);     "what = ".$what);
     my $namespace='roles';      my $namespace='roles';
     chomp($what);      chomp($what);
     my $hashref = TieUserHash($udom, $uname, $namespace,      my $hashref = &tie_user_hash($udom, $uname, $namespace,
   &GDBM_WRCREAT(), "D",   &GDBM_WRCREAT(), "D",
   "$exedom:$exeuser:$what");   "$exedom:$exeuser:$what");
       
     if ($hashref) {      if ($hashref) {
        my @rolekeys=split(/\&/,$what);   my @rolekeys=split(/\&/,$what);
          
        foreach my $key (@rolekeys) {   foreach my $key (@rolekeys) {
   delete $hashref->{$key};      delete $hashref->{$key};
        }   }
        if (untie(%$hashref)) {   if (untie(%$hashref)) {
   Reply($client, "ok\n", $userinput);      &Reply($client, "ok\n", $userinput);
  } else {   } else {
    Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".      &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
     "while attempting rolesdel\n", $userinput);       "while attempting rolesdel\n", $userinput);
  }   }
      } else {      } else {
         Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".          &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
  "while attempting rolesdel\n", $userinput);   "while attempting rolesdel\n", $userinput);
      }      }
           
     return 1;      return 1;
 }  }
 RegisterHandler("rolesdel", \&RolesDeleteHandler, 1,1, 0); # Encoded client only  &register_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
   
 # Unencrypted get from a user's profile database.  See   # Unencrypted get from a user's profile database.  See 
 # GetProfileEntryEncrypted for a version that does end-to-end encryption.  # GetProfileEntryEncrypted for a version that does end-to-end encryption.
Line 1626  RegisterHandler("rolesdel", \&RolesDelet Line 2508  RegisterHandler("rolesdel", \&RolesDelet
 #   1       - Continue processing.  #   1       - Continue processing.
 #   0       - Exit.  #   0       - Exit.
 #  #
 sub GetProfileEntry {  sub get_profile_entry {
     my $cmd      = shift;      my ($cmd, $tail, $client) = @_;
     my $tail     = shift;  
     my $client   = shift;  
     my $userinput= "$cmd:$tail";      my $userinput= "$cmd:$tail";
         
     my ($udom,$uname,$namespace,$what) = split(/:/,$tail);      my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
     chomp($what);      chomp($what);
     my $hashref = TieUserHash($udom, $uname, $namespace,  
  &GDBM_READER());  
     if ($hashref) {  
         my @queries=split(/\&/,$what);  
         my $qresult='';  
   
  for (my $i=0;$i<=$#queries;$i++) {      my $replystring = read_profile($udom, $uname, $namespace, $what);
     $qresult.="$hashref->{$queries[$i]}&";    # Presumably failure gives empty string.      my ($first) = split(/:/,$replystring);
  }      if($first ne "error") {
  $qresult=~s/\&$//;              # Remove trailing & from last lookup.   &Reply($client, "$replystring\n", $userinput);
  if (untie(%$hashref)) {  
     Reply($client, "$qresult\n", $userinput);  
  } else {  
     Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".  
     "while attempting get\n", $userinput);  
  }  
     } else {      } else {
  if ($!+0 == 2) {               # +0 coerces errno -> number 2 is ENOENT   &Failure($client, $replystring." while attempting get\n", $userinput);
     Failure($client, "error:No such file or ".  
     "GDBM reported bad block error\n", $userinput);  
  } else {                        # Some other undifferentiated err.  
     Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".  
     "while attempting get\n", $userinput);  
  }  
     }      }
     return 1;      return 1;
   
   
 }  }
 RegisterHandler("get", \&GetProfileEntry, 0,1,0);  &register_handler("get", \&get_profile_entry, 0,1,0);
   
 #  #
 #  Process the encrypted get request.  Note that the request is sent  #  Process the encrypted get request.  Note that the request is sent
 #  in clear, but the reply is encrypted.  This is a small covert channel:  #  in clear, but the reply is encrypted.  This is a small covert channel:
Line 1681  RegisterHandler("get", \&GetProfileEntry Line 2548  RegisterHandler("get", \&GetProfileEntry
 #  Returns:  #  Returns:
 #     1      - Continue processing  #     1      - Continue processing
 #     0      - server should exit.  #     0      - server should exit.
 sub GetProfileEntryEncrypted {  sub get_profile_entry_encrypted {
     my $cmd       = shift;      my ($cmd, $tail, $client) = @_;
     my $tail      = shift;  
     my $client    = shift;  
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
         
     my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);      my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
     chomp($what);      chomp($what);
     my $hashref = TieUserHash($udom, $uname, $namespace,      my $qresult = read_profile($udom, $uname, $namespace, $what);
   &GDBM_READER());      my ($first) = split(/:/, $qresult);
     if ($hashref) {      if($first ne "error") {
         my @queries=split(/\&/,$what);  
         my $qresult='';   if ($cipher) {
  for (my $i=0;$i<=$#queries;$i++) {      my $cmdlength=length($qresult);
     $qresult.="$hashref->{$queries[$i]}&";      $qresult.="         ";
  }      my $encqresult='';
  if (untie(%$hashref)) {      for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
     $qresult=~s/\&$//;   $encqresult.= unpack("H16", 
     if ($cipher) {       $cipher->encrypt(substr($qresult,
  my $cmdlength=length($qresult);       $encidx,
  $qresult.="         ";       8)));
  my $encqresult='';  
  for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {  
     $encqresult.= unpack("H16", $cipher->encrypt(substr($qresult,  
  $encidx,  
  8)));  
  }  
  Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);  
     } else {  
  Failure( $client, "error:no_key\n", $userinput);  
     }      }
       &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
  } else {   } else {
     Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".   &Failure( $client, "error:no_key\n", $userinput);
     "while attempting eget\n", $userinput);      }
  }  
     } else {      } else {
  Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".   &Failure($client, "$qresult while attempting eget\n", $userinput);
  "while attempting eget\n", $userinput);  
     }      }
           
     return 1;      return 1;
 }  }
 RegisterHandler("eget", \&GetProfileEncrypted, 0, 1, 0);  &register_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);
   
 #  #
 #   Deletes a key in a user profile database.  #   Deletes a key in a user profile database.
Line 1743  RegisterHandler("eget", \&GetProfileEncr Line 2600  RegisterHandler("eget", \&GetProfileEncr
 #     0   - Exit server.  #     0   - Exit server.
 #  #
 #  #
   sub delete_profile_entry {
       my ($cmd, $tail, $client) = @_;
   
 sub DeleteProfileEntry {  
     my $cmd      = shift;  
     my $tail     = shift;  
     my $client   = shift;  
     my $userinput = "cmd:$tail";      my $userinput = "cmd:$tail";
   
     my ($udom,$uname,$namespace,$what) = split(/:/,$tail);      my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
     chomp($what);      chomp($what);
     my $hashref = TieUserHash($udom, $uname, $namespace,      my $hashref = &tie_user_hash($udom, $uname, $namespace,
   &GDBM_WRCREAT(),   &GDBM_WRCREAT(),
   "D",$what);   "D",$what);
     if ($hashref) {      if ($hashref) {
         my @keys=split(/\&/,$what);          my @keys=split(/\&/,$what);
  foreach my $key (@keys) {   foreach my $key (@keys) {
     delete($hashref->{$key});      delete($hashref->{$key});
  }   }
  if (untie(%$hashref)) {   if (untie(%$hashref)) {
     Reply($client, "ok\n", $userinput);      &Reply($client, "ok\n", $userinput);
  } else {   } else {
     Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".      &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
     "while attempting del\n", $userinput);      "while attempting del\n", $userinput);
  }   }
     } else {      } else {
  Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".   &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
  "while attempting del\n", $userinput);   "while attempting del\n", $userinput);
     }      }
     return 1;      return 1;
 }  }
 RegisterHandler("del", \&DeleteProfileEntry, 0, 1, 0);  &register_handler("del", \&delete_profile_entry, 0, 1, 0);
   
 #  #
 #  List the set of keys that are defined in a profile database file.  #  List the set of keys that are defined in a profile database file.
 #  A successful reply from this will contain an & separated list of  #  A successful reply from this will contain an & separated list of
Line 1788  RegisterHandler("del", \&DeleteProfileEn Line 2644  RegisterHandler("del", \&DeleteProfileEn
 #    1    - Continue processing.  #    1    - Continue processing.
 #    0    - Exit the server.  #    0    - Exit the server.
 #  #
 sub GetProfileKeys {  sub get_profile_keys {
     my $cmd       = shift;      my ($cmd, $tail, $client) = @_;
     my $tail      = shift;  
     my $client    = shift;  
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($udom,$uname,$namespace)=split(/:/,$tail);      my ($udom,$uname,$namespace)=split(/:/,$tail);
     my $qresult='';      my $qresult='';
     my $hashref = TieUserHash($udom, $uname, $namespace,      my $hashref = &tie_user_hash($udom, $uname, $namespace,
   &GDBM_READER());    &GDBM_READER());
     if ($hashref) {      if ($hashref) {
  foreach my $key (keys %$hashref) {   foreach my $key (keys %$hashref) {
Line 1804  sub GetProfileKeys { Line 2659  sub GetProfileKeys {
  }   }
  if (untie(%$hashref)) {   if (untie(%$hashref)) {
     $qresult=~s/\&$//;      $qresult=~s/\&$//;
     Reply($client, "$qresult\n", $userinput);      &Reply($client, "$qresult\n", $userinput);
  } else {   } else {
     Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".      &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
     "while attempting keys\n", $userinput);      "while attempting keys\n", $userinput);
  }   }
     } else {      } else {
  Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".   &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
  "while attempting keys\n", $userinput);   "while attempting keys\n", $userinput);
     }      }
         
     return 1;      return 1;
 }  }
 RegisterHandler("keys", \&GetProfileKeys, 0, 1, 0);  &register_handler("keys", \&get_profile_keys, 0, 1, 0);
   
 #  #
 #   Dump the contents of a user profile database.  #   Dump the contents of a user profile database.
 #   Note that this constitutes a very large covert channel too since  #   Note that this constitutes a very large covert channel too since
Line 1836  RegisterHandler("keys", \&GetProfileKeys Line 2692  RegisterHandler("keys", \&GetProfileKeys
 #     1    - Continue processing.  #     1    - Continue processing.
 #     0    - Exit the server.  #     0    - Exit the server.
 #  #
 sub DumpProfileDatabase {  sub dump_profile_database {
     my $cmd       = shift;      my ($cmd, $tail, $client) = @_;
     my $tail      = shift;  
     my $client    = shift;  
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
         
     my ($udom,$uname,$namespace) = split(/:/,$tail);      my ($udom,$uname,$namespace) = split(/:/,$tail);
     my $hashref = TieUserHash($udom, $uname, $namespace,      my $hashref = &tie_user_hash($udom, $uname, $namespace,
   &GDBM_READER());   &GDBM_READER());
     if ($hashref) {      if ($hashref) {
  # Structure of %data:   # Structure of %data:
  # $data{$symb}->{$parameter}=$value;   # $data{$symb}->{$parameter}=$value;
  # $data{$symb}->{'v.'.$parameter}=$version;   # $data{$symb}->{'v.'.$parameter}=$version;
  # since $parameter will be unescaped, we do not   # since $parameter will be unescaped, we do not
   # have to worry about silly parameter names...    # have to worry about silly parameter names...
   
         my $qresult='';          my $qresult='';
  my %data = ();                     # A hash of anonymous hashes..   my %data = ();                     # A hash of anonymous hashes..
  while (my ($key,$value) = each(%$hashref)) {   while (my ($key,$value) = each(%$hashref)) {
Line 1874  sub DumpProfileDatabase { Line 2729  sub DumpProfileDatabase {
  }   }
     }      }
     chop($qresult);      chop($qresult);
     Reply($client , "$qresult\n", $userinput);      &Reply($client , "$qresult\n", $userinput);
  } else {   } else {
     Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".      &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
      "while attempting currentdump\n", $userinput);       "while attempting currentdump\n", $userinput);
  }   }
     } else {      } else {
  Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".   &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
  "while attempting currentdump\n", $userinput);   "while attempting currentdump\n", $userinput);
     }      }
   
     return 1;      return 1;
 }  }
 RegisterHandler("currentdump", \&DumpProfileDatabase, 0, 1, 0);  &register_handler("currentdump", \&dump_profile_database, 0, 1, 0);
   
 #  #
 #   Dump a profile database with an optional regular expression  #   Dump a profile database with an optional regular expression
 #   to match against the keys.  In this dump, no effort is made  #   to match against the keys.  In this dump, no effort is made
Line 1911  RegisterHandler("currentdump", \&DumpPro Line 2767  RegisterHandler("currentdump", \&DumpPro
 # Side effects:  # Side effects:
 #    response is written to $client.  #    response is written to $client.
 #  #
 sub DumpWithRegexp {  sub dump_with_regexp {
     my $cmd    = shift;      my ($cmd, $tail, $client) = @_;
     my $tail   = shift;  
     my $client = shift;  
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
Line 1924  sub DumpWithRegexp { Line 2779  sub DumpWithRegexp {
     } else {      } else {
  $regexp='.';   $regexp='.';
     }      }
     my $hashref =TieUserHash($udom, $uname, $namespace,      my $hashref = &tie_user_hash($udom, $uname, $namespace,
  &GDBM_READER());   &GDBM_READER());
     if ($hashref) {      if ($hashref) {
         my $qresult='';          my $qresult='';
Line 1940  sub DumpWithRegexp { Line 2795  sub DumpWithRegexp {
  }   }
  if (untie(%$hashref)) {   if (untie(%$hashref)) {
     chop($qresult);      chop($qresult);
     Reply($client, "$qresult\n", $userinput);      &Reply($client, "$qresult\n", $userinput);
  } else {   } else {
     Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".      &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
      "while attempting dump\n", $userinput);       "while attempting dump\n", $userinput);
  }   }
     } else {      } else {
  Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".   &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
  "while attempting dump\n", $userinput);   "while attempting dump\n", $userinput);
     }      }
   
     return 1;      return 1;
 }  }
 RegisterHandler("dump", \&DumpWithRegexp, 0, 1, 0);  &register_handler("dump", \&dump_with_regexp, 0, 1, 0);
   
 #  Store an aitem in any database but the roles database.  #  Store a set of key=value pairs associated with a versioned name.
 #  #
 #  Parameters:  #  Parameters:
 #    $cmd                - Request command keyword.  #    $cmd                - Request command keyword.
Line 1972  RegisterHandler("dump", \&DumpWithRegexp Line 2827  RegisterHandler("dump", \&DumpWithRegexp
 #      1 (keep on processing).  #      1 (keep on processing).
 #  Side-Effects:  #  Side-Effects:
 #    Writes to the client  #    Writes to the client
 sub StoreHandler {  sub store_handler {
     my $cmd    = shift;      my ($cmd, $tail, $client) = @_;
     my $tail   = shift;  
     my $client = shift;  
     
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
Line 1984  sub StoreHandler { Line 2837  sub StoreHandler {
   
  chomp($what);   chomp($what);
  my @pairs=split(/\&/,$what);   my @pairs=split(/\&/,$what);
  my $hashref  = TieUserHash($udom, $uname, $namespace,   my $hashref  = &tie_user_hash($udom, $uname, $namespace,
        &GDBM_WRCREAT(), "P",         &GDBM_WRCREAT(), "S",
        "$rid:$what");         "$rid:$what");
  if ($hashref) {   if ($hashref) {
     my $now = time;      my $now = time;
Line 2003  sub StoreHandler { Line 2856  sub StoreHandler {
     $allkeys.='timestamp';      $allkeys.='timestamp';
     $hashref->{"$version:keys:$rid"}=$allkeys;      $hashref->{"$version:keys:$rid"}=$allkeys;
     if (untie($hashref)) {      if (untie($hashref)) {
  Reply($client, "ok\n", $userinput);   &Reply($client, "ok\n", $userinput);
     } else {      } else {
  Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".   &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
  "while attempting store\n", $userinput);   "while attempting store\n", $userinput);
     }      }
  } else {   } else {
     Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".      &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
      "while attempting store\n", $userinput);       "while attempting store\n", $userinput);
  }   }
     } else {      } else {
  Failure($client, "refused\n", $userinput);   &Failure($client, "refused\n", $userinput);
     }      }
   
     return 1;      return 1;
 }  }
 RegisterHandler("store", \&StoreHandler, 0, 1, 0);  &register_handler("store", \&store_handler, 0, 1, 0);
   
 #  #
 #   Restore a prior version of a resource.  #  Dump out all versions of a resource that has key=value pairs associated
   # with it for each version.  These resources are built up via the store
   # command.
 #  #
 #  Parameters:  #  Parameters:
 #     $cmd               - Command keyword.  #     $cmd               - Command keyword.
Line 2034  RegisterHandler("store", \&StoreHandler, Line 2890  RegisterHandler("store", \&StoreHandler,
 #      1  indicating the caller should not yet exit.  #      1  indicating the caller should not yet exit.
 # Side-effects:  # Side-effects:
 #   Writes a reply to the client.  #   Writes a reply to the client.
   #   The reply is a string of the following shape:
   #   version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
   #    Where the 1 above represents version 1.
   #    this continues for all pairs of keys in all versions.
   #
 #  #
 sub RestoreHandler {  #    
     my $cmd     = shift;  #
     my $tail    = shift;  sub restore_handler {
     my $client  = shift;      my ($cmd, $tail, $client) = @_;
   
     my $userinput = "$cmd:$tail"; # Only used for logging purposes.      my $userinput = "$cmd:$tail"; # Only used for logging purposes.
   
Line 2046  sub RestoreHandler { Line 2907  sub RestoreHandler {
     $namespace=~s/\//\_/g;      $namespace=~s/\//\_/g;
     $namespace=~s/\W//g;      $namespace=~s/\W//g;
     chomp($rid);      chomp($rid);
     my $proname=propath($udom,$uname);      my $proname=&propath($udom,$uname);
     my $qresult='';      my $qresult='';
     my %hash;      my %hash;
     if (tie(%hash,'GDBM_File',"$proname/$namespace.db",      if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
Line 2065  sub RestoreHandler { Line 2926  sub RestoreHandler {
  }   }
  if (untie(%hash)) {   if (untie(%hash)) {
     $qresult=~s/\&$//;      $qresult=~s/\&$//;
     Reply( $client, "$qresult\n", $userinput);      &Reply( $client, "$qresult\n", $userinput);
  } else {   } else {
     Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".      &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
     "while attempting restore\n", $userinput);      "while attempting restore\n", $userinput);
  }   }
     } else {      } else {
  Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".   &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
  "while attempting restore\n", $userinput);   "while attempting restore\n", $userinput);
     }      }
       
Line 2079  sub RestoreHandler { Line 2940  sub RestoreHandler {
   
   
 }  }
 RegisterHandler("restore", \&RestoreHandler, 0,1,0);  &register_handler("restore", \&restore_handler, 0,1,0);
   
 #  #
 #   Add a chat message to to a discussion board.  #   Add a chat message to to a discussion board.
Line 2099  RegisterHandler("restore", \&RestoreHand Line 2960  RegisterHandler("restore", \&RestoreHand
 #   writes a reply to the client.  #   writes a reply to the client.
 #  #
 #  #
 sub SendChatHandler {  sub send_chat_handler {
     my $cmd     = shift;      my ($cmd, $tail, $client) = @_;
     my $tail    = shift;  
     my $client  = shift;  
           
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($cdom,$cnum,$newpost)=split(/\:/,$tail);      my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
     &chatadd($cdom,$cnum,$newpost);      &chat_add($cdom,$cnum,$newpost);
     Reply($client, "ok\n", $userinput);      &Reply($client, "ok\n", $userinput);
   
     return 1;      return 1;
 }  }
 RegisterHandler("chatsend", \&SendChatHandler, 0, 1, 0);  &register_handler("chatsend", \&send_chat_handler, 0, 1, 0);
   
 #  #
 #   Retrieve the set of chat messagss from a discussion board.  #   Retrieve the set of chat messagss from a discussion board.
 #  #
Line 2130  RegisterHandler("chatsend", \&SendChatHa Line 2991  RegisterHandler("chatsend", \&SendChatHa
 # Side effects:  # Side effects:
 #    Response is written to the client.  #    Response is written to the client.
 #  #
 sub RetrieveChatHandler {  sub retrieve_chat_handler {
     my $cmd      = shift;      my ($cmd, $tail, $client) = @_;
     my $tail     = shift;  
     my $client   = shift;  
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);      my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
     my $reply='';      my $reply='';
     foreach (&getchat($cdom,$cnum,$udom,$uname)) {      foreach (&get_chat($cdom,$cnum,$udom,$uname)) {
  $reply.=&escape($_).':';   $reply.=&escape($_).':';
     }      }
     $reply=~s/\:$//;      $reply=~s/\:$//;
     Reply($client, $reply."\n", $userinput);      &Reply($client, $reply."\n", $userinput);
   
   
     return 1;      return 1;
 }  }
 RegisterHandler("chatretr", \&RetrieveChatHandler, 0, 1, 0);  &register_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
   
 #  #
 #  Initiate a query of an sql database.  SQL query repsonses get put in  #  Initiate a query of an sql database.  SQL query repsonses get put in
 #  a file for later retrieval.  This prevents sql query results from  #  a file for later retrieval.  This prevents sql query results from
Line 2168  RegisterHandler("chatretr", \&RetrieveCh Line 3029  RegisterHandler("chatretr", \&RetrieveCh
 # Side-effects:  # Side-effects:
 #    a reply is written to $client.  #    a reply is written to $client.
 #  #
 sub SendQueryHandler {  sub send_query_handler {
     my $cmd     = shift;      my ($cmd, $tail, $client) = @_;
     my $tail    = shift;  
     my $client  = shift;  
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);      my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
     $query=~s/\n*$//g;      $query=~s/\n*$//g;
     Reply($client, "". sqlreply("$clientname\&$query".      &Reply($client, "". &sql_reply("$clientname\&$query".
  "\&$arg1"."\&$arg2"."\&$arg3")."\n",   "\&$arg1"."\&$arg2"."\&$arg3")."\n",
   $userinput);    $userinput);
           
     return 1;      return 1;
 }  }
 RegisterHandler("querysend", \&SendQueryHandler, 0, 1, 0);  &register_handler("querysend", \&send_query_handler, 0, 1, 0);
   
 #  #
 #   Add a reply to an sql query.  SQL queries are done asyncrhonously.  #   Add a reply to an sql query.  SQL queries are done asyncrhonously.
Line 2210  RegisterHandler("querysend", \&SendQuery Line 3070  RegisterHandler("querysend", \&SendQuery
 # Side effects:  # Side effects:
 #    ok written to the client.  #    ok written to the client.
 #  #
 sub ReplyQueryHandler {  sub reply_query_handler {
     my $cmd    = shift;      my ($cmd, $tail, $client) = @_;
     my $tail   = shift;  
     my $client = shift;  
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
Line 2227  sub ReplyQueryHandler { Line 3086  sub ReplyQueryHandler {
  my $store2=IO::File->new(">$execdir/tmp/$id.end");   my $store2=IO::File->new(">$execdir/tmp/$id.end");
  print $store2 "done\n";   print $store2 "done\n";
  close $store2;   close $store2;
  Reply($client, "ok\n", $userinput);   &Reply($client, "ok\n", $userinput);
     } else {      } else {
  Failure($client, "error: ".($!+0)   &Failure($client, "error: ".($!+0)
  ." IO::File->new Failed ".   ." IO::File->new Failed ".
  "while attempting queryreply\n", $userinput);   "while attempting queryreply\n", $userinput);
     }      }
Line 2237  sub ReplyQueryHandler { Line 3096  sub ReplyQueryHandler {
   
     return 1;      return 1;
 }  }
 RegisterHandler("queryreply", \&ReplyQueryHandler, 0, 1, 0);  &register_handler("queryreply", \&reply_query_handler, 0, 1, 0);
   
 #  #
 #  Process the courseidput query.  Not quite sure what this means  #  Process the courseidput request.  Not quite sure what this means
 #  at the system level sense.  It appears a gdbm file in the   #  at the system level sense.  It appears a gdbm file in the 
 #  /home/httpd/lonUsers/$domain/nohist_courseids is tied and  #  /home/httpd/lonUsers/$domain/nohist_courseids is tied and
 #  a set of entries made in that database.  #  a set of entries made in that database.
Line 2249  RegisterHandler("queryreply", \&ReplyQue Line 3109  RegisterHandler("queryreply", \&ReplyQue
 #   $tail     - Tail of the command.  In this case consists of a colon  #   $tail     - Tail of the command.  In this case consists of a colon
 #               separated list contaning the domain to apply this to and  #               separated list contaning the domain to apply this to and
 #               an ampersand separated list of keyword=value pairs.  #               an ampersand separated list of keyword=value pairs.
   #               Each value is a colon separated list that includes:  
   #               description, institutional code and course owner.
   #               For backward compatibility with versions included
   #               in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
   #               code and/or course owner are preserved from the existing 
   #               record when writing a new record in response to 1.1 or 
   #               1.2 implementations of lonnet::flushcourselogs().   
   #                      
 #   $client   - Socket open on the client.  #   $client   - Socket open on the client.
 # Returns:  # Returns:
 #   1    - indicating that processing should continue  #   1    - indicating that processing should continue
Line 2256  RegisterHandler("queryreply", \&ReplyQue Line 3124  RegisterHandler("queryreply", \&ReplyQue
 # Side effects:  # Side effects:
 #   reply is written to the client.  #   reply is written to the client.
 #  #
 sub PutCourseIdHandler {  sub put_course_id_handler {
     my $cmd    = shift;      my ($cmd, $tail, $client) = @_;
     my $tail   = shift;  
     my $client = shift;  
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
       my ($udom, $what) = split(/:/, $tail,2);
     chomp($what);      chomp($what);
     my $now=time;      my $now=time;
     my @pairs=split(/\&/,$what);      my @pairs=split(/\&/,$what);
   
     my $hashref = TieDomainHash($udom, "nohist_courseids", &GDBM_WRCREAT());      my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
     if ($hashref) {      if ($hashref) {
  foreach my $pair (@pairs) {   foreach my $pair (@pairs) {
     my ($key,$value)=split(/=/,$pair);              my ($key,$courseinfo) = split(/=/,$pair,2);
     $hashref->{$key}=$value.':'.$now;              $courseinfo =~ s/=/:/g;
   
               my @current_items = split(/:/,$hashref->{$key});
               shift(@current_items); # remove description
               pop(@current_items);   # remove last access
               my $numcurrent = scalar(@current_items);
   
               my @new_items = split(/:/,$courseinfo);
               my $numnew = scalar(@new_items);
               if ($numcurrent > 0) {
                   if ($numnew == 1) { # flushcourselogs() from 1.1 or earlier
                       $courseinfo .= ':'.join(':',@current_items);
                   } elsif ($numnew == 2) { # flushcourselogs() from 1.2.X
                       $courseinfo .= ':'.$current_items[$numcurrent-1];
                   }
               }
       $hashref->{$key}=$courseinfo.':'.$now;
  }   }
  if (untie(%$hashref)) {   if (untie(%$hashref)) {
     Reply($client, "ok\n", $userinput);      &Reply( $client, "ok\n", $userinput);
  } else {   } else {
     Failure( $client, "error: ".($!+0)      &Failure($client, "error: ".($!+0)
      ." untie(GDBM) Failed ".       ." untie(GDBM) Failed ".
      "while attempting courseidput\n", $userinput);       "while attempting courseidput\n", $userinput);
  }   }
     } else {      } else {
  Failure( $client, "error: ".($!+0)   &Failure($client, "error: ".($!+0)
  ." tie(GDBM) Failed ".   ." tie(GDBM) Failed ".
  "while attempting courseidput\n", $userinput);   "while attempting courseidput\n", $userinput);
     }      }
       
   
     return 1;      return 1;
 }  }
 RegisterHandler("courseidput", \&PutCourseIdHandler, 0, 1, 0);  &register_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
   
 #  Retrieves the value of a course id resource keyword pattern  #  Retrieves the value of a course id resource keyword pattern
 #  defined since a starting date.  Both the starting date and the  #  defined since a starting date.  Both the starting date and the
Line 2308  RegisterHandler("courseidput", \&PutCour Line 3193  RegisterHandler("courseidput", \&PutCour
 #                 description - regular expression that is used to filter  #                 description - regular expression that is used to filter
 #                            the dump.  Only keywords matching this regexp  #                            the dump.  Only keywords matching this regexp
 #                            will be used.  #                            will be used.
   #                 institutional code - optional supplied code to filter 
   #                            the dump. Only courses with an institutional code 
   #                            that match the supplied code will be returned.
   #                 owner    - optional supplied username of owner to filter
   #                            the dump.  Only courses for which the course 
   #                            owner matches the supplied username will be
   #                            returned. Implicit assumption that owner
   #                            is a user in the domain in which the
   #                            course database is defined.
 #     $client  - The socket open on the client.  #     $client  - The socket open on the client.
 # Returns:  # Returns:
 #    1     - Continue processing.  #    1     - Continue processing.
 # Side Effects:  # Side Effects:
 #   a reply is written to $client.  #   a reply is written to $client.
 sub DumpCourseIdHandler {  sub dump_course_id_handler {
     my $cmd    = shift;      my ($cmd, $tail, $client) = @_;
     my $tail   = shift;  
     my $client = shift;  
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($udom,$since,$description) =split(/:/,$tail);      my ($udom,$since,$description,$instcodefilter,$ownerfilter) =split(/:/,$tail);
     if (defined($description)) {      if (defined($description)) {
  $description=&unescape($description);   $description=&unescape($description);
     } else {      } else {
  $description='.';   $description='.';
     }      }
       if (defined($instcodefilter)) {
           $instcodefilter=&unescape($instcodefilter);
       } else {
           $instcodefilter='.';
       }
       if (defined($ownerfilter)) {
           $ownerfilter=&unescape($ownerfilter);
       } else {
           $ownerfilter='.';
       }
   
     unless (defined($since)) { $since=0; }      unless (defined($since)) { $since=0; }
     my $qresult='';      my $qresult='';
       my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
     my $hashref = TieDomainHash($udom, "nohist_courseids", &GDBM_WRCREAT());  
     if ($hashref) {      if ($hashref) {
  while (my ($key,$value) = each(%$hashref)) {   while (my ($key,$value) = each(%$hashref)) {
     my ($descr,$lasttime)=split(/\:/,$value);      my ($descr,$lasttime,$inst_code,$owner);
     if ($lasttime<$since) {               my @courseitems = split(/:/,$value);
  next;               $lasttime = pop(@courseitems);
     }      ($descr,$inst_code,$owner)=@courseitems;
     if ($description eq '.') {      if ($lasttime<$since) { next; }
  $qresult.=$key.'='.$descr.'&';              my $match = 1;
     } else {      unless ($description eq '.') {
  my $unescapeVal = &unescape($descr);   my $unescapeDescr = &unescape($descr);
  if (eval('$unescapeVal=~/$description/i')) {   unless (eval('$unescapeDescr=~/\Q$description\E/i')) {
     $qresult.="$key=$descr&";                      $match = 0;
  }   }
               }
               unless ($instcodefilter eq '.' || !defined($instcodefilter)) {
                   my $unescapeInstcode = &unescape($inst_code);
                   unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {
                       $match = 0;
                   }
     }      }
               unless ($ownerfilter eq '.' || !defined($ownerfilter)) {
                   my $unescapeOwner = &unescape($owner);
                   unless (eval('$unescapeOwner=~/\Q$ownerfilter\E/i')) {
                       $match = 0;
                   }
               }
               if ($match == 1) {
                   $qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';
               }
  }   }
  if (untie(%$hashref)) {   if (untie(%$hashref)) {
     chop($qresult);      chop($qresult);
     Reply($client, "$qresult\n", $userinput);      &Reply($client, "$qresult\n", $userinput);
  } else {   } else {
     Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".      &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
     "while attempting courseiddump\n", $userinput);      "while attempting courseiddump\n", $userinput);
  }   }
     } else {      } else {
  Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".   &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
  "while attempting courseiddump\n", $userinput);   "while attempting courseiddump\n", $userinput);
     }      }
   
   
     return 1;      return 1;
 }  }
 RegisterHandler("courseiddump", \&DumpCourseIdHandler, 0, 1, 0);  &register_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
   
 #  #
 #  Puts an id to a domains id database.   #  Puts an id to a domains id database. 
 #  #
Line 2377  RegisterHandler("courseiddump", \&DumpCo Line 3295  RegisterHandler("courseiddump", \&DumpCo
 #  Side effects:  #  Side effects:
 #     reply is written to $client.  #     reply is written to $client.
 #  #
 sub PutIdHandler {  sub put_id_handler {
     my $cmd    = shift;      my ($cmd,$tail,$client) = @_;
     my $tail   = shift;  
     my $client = shift;  
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($udom,$what)=split(/:/,$tail);      my ($udom,$what)=split(/:/,$tail);
     chomp($what);      chomp($what);
     my @pairs=split(/\&/,$what);      my @pairs=split(/\&/,$what);
     my $hashref = TieDomainHash($udom, "ids", &GDBM_WRCREAT(),      my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
  "P", $what);     "P", $what);
     if ($hashref) {      if ($hashref) {
  foreach my $pair (@pairs) {   foreach my $pair (@pairs) {
     my ($key,$value)=split(/=/,$pair);      my ($key,$value)=split(/=/,$pair);
     $hashref->{$key}=$value;      $hashref->{$key}=$value;
  }   }
  if (untie(%$hashref)) {   if (untie(%$hashref)) {
     Reply($client, "ok\n", $userinput);      &Reply($client, "ok\n", $userinput);
  } else {   } else {
     Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".      &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
     "while attempting idput\n", $userinput);       "while attempting idput\n", $userinput);
  }   }
     } else {      } else {
  Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".   &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
  "while attempting idput\n", $userinput);    "while attempting idput\n", $userinput);
     }      }
   
     return 1;      return 1;
 }  }
   &register_handler("idput", \&put_id_handler, 0, 1, 0);
   
 RegisterHandler("idput", \&PutIdHandler, 0, 1, 0);  
 #  #
 #  Retrieves a set of id values from the id database.  #  Retrieves a set of id values from the id database.
 #  Returns an & separated list of results, one for each requested id to the  #  Returns an & separated list of results, one for each requested id to the
Line 2428  RegisterHandler("idput", \&PutIdHandler, Line 3345  RegisterHandler("idput", \&PutIdHandler,
 # Side effects:  # Side effects:
 #   An & separated list of results is written to $client.  #   An & separated list of results is written to $client.
 #  #
 sub GetIdHandler {  sub get_id_handler {
     my $cmd    = shift;      my ($cmd, $tail, $client) = @_;
     my $tail   = shift;  
     my $client = shift;  
   
       
     my $userinput = "$client:$tail";      my $userinput = "$client:$tail";
       
     my ($udom,$what)=split(/:/,$tail);      my ($udom,$what)=split(/:/,$tail);
     chomp($what);      chomp($what);
     my @queries=split(/\&/,$what);      my @queries=split(/\&/,$what);
     my $qresult='';      my $qresult='';
     my $hashref = TieDomainHash($udom, "ids", &GDBM_READER());      my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER());
     if ($hashref) {      if ($hashref) {
  for (my $i=0;$i<=$#queries;$i++) {   for (my $i=0;$i<=$#queries;$i++) {
     $qresult.="$hashref->{$queries[$i]}&";      $qresult.="$hashref->{$queries[$i]}&";
  }   }
  if (untie(%$hashref)) {   if (untie(%$hashref)) {
     $qresult=~s/\&$//;      $qresult=~s/\&$//;
     Reply($client, "$qresult\n", $userinput);      &Reply($client, "$qresult\n", $userinput);
  } else {   } else {
     Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".      &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
      "while attempting idget\n",$userinput);        "while attempting idget\n",$userinput);
  }   }
     } else {      } else {
  Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".   &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
  "while attempting idget\n",$userinput);   "while attempting idget\n",$userinput);
     }      }
       
     return 1;      return 1;
 }  }
   &register_handler("idget", \&get_id_handler, 0, 1, 0);
   
 RegisterHandler("idget", \&GetIdHandler, 0, 1, 0);  
 #  #
 #  Process the tmpput command I'm not sure what this does.. Seems to  #  Process the tmpput command I'm not sure what this does.. Seems to
 #  create a file in the lonDaemons/tmp directory of the form $id.tmp  #  create a file in the lonDaemons/tmp directory of the form $id.tmp
Line 2477  RegisterHandler("idget", \&GetIdHandler, Line 3393  RegisterHandler("idget", \&GetIdHandler,
 # Side effects:  # Side effects:
 #   A file is created in the local filesystem.  #   A file is created in the local filesystem.
 #   A reply is sent to the client.  #   A reply is sent to the client.
 sub TmpPutHandler {  sub tmp_put_handler {
     my $cmd       = shift;      my ($cmd, $what, $client) = @_;
     my $what      = shift;  
     my $client    = shift;  
   
     my $userinput = "$cmd:$what"; # Reconstruct for logging.      my $userinput = "$cmd:$what"; # Reconstruct for logging.
   
Line 2494  sub TmpPutHandler { Line 3408  sub TmpPutHandler {
     if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {      if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
  print $store $what;   print $store $what;
  close $store;   close $store;
  Reply($client, "$id\n", $userinput);   &Reply($client, "$id\n", $userinput);
     } else {      } else {
  Failure( $client, "error: ".($!+0)."IO::File->new Failed ".   &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
  "while attempting tmpput\n", $userinput);    "while attempting tmpput\n", $userinput);
     }      }
     return 1;      return 1;
       
 }  }
 RegisterHandler("tmpput", \&TmpPutHandler, 0, 1, 0);  &register_handler("tmpput", \&tmp_put_handler, 0, 1, 0);
   
 #   Processes the tmpget command.  This command returns the contents  #   Processes the tmpget command.  This command returns the contents
 #  of a temporary resource file(?) created via tmpput.  #  of a temporary resource file(?) created via tmpput.
Line 2516  RegisterHandler("tmpput", \&TmpPutHandle Line 3430  RegisterHandler("tmpput", \&TmpPutHandle
 #    1         - Inidcating processing can continue.  #    1         - Inidcating processing can continue.
 # Side effects:  # Side effects:
 #   A reply is sent to the client.  #   A reply is sent to the client.
   
 #  #
 sub TmpGetHandler {  sub tmp_get_handler {
     my $cmd       = shift;      my ($cmd, $id, $client) = @_;
     my $id        = shift;  
     my $client    = shift;  
     my $userinput = "$cmd:$id";       my $userinput = "$cmd:$id"; 
       
   
     chomp($id);  
     $id=~s/\W/\_/g;      $id=~s/\W/\_/g;
     my $store;      my $store;
     my $execdir=$perlvar{'lonDaemons'};      my $execdir=$perlvar{'lonDaemons'};
     if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {      if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
  my $reply=<$store>;   my $reply=<$store>;
  Reply( $client, "$reply\n", $userinput);   &Reply( $client, "$reply\n", $userinput);
  close $store;   close $store;
     } else {      } else {
  Failure( $client, "error: ".($!+0)."IO::File->new Failed ".   &Failure( $client, "error: ".($!+0)."IO::File->new Failed ".
  "while attempting tmpget\n", $userinput);    "while attempting tmpget\n", $userinput);
     }      }
   
     return 1;      return 1;
 }  }
 RegisterHandler("tmpget", \&TmpGetHandler, 0, 1, 0);  &register_handler("tmpget", \&tmp_get_handler, 0, 1, 0);
   
 #  #
 #  Process the tmpdel command.  This command deletes a temp resource  #  Process the tmpdel command.  This command deletes a temp resource
 #  created by the tmpput command.  #  created by the tmpput command.
Line 2554  RegisterHandler("tmpget", \&TmpGetHandle Line 3467  RegisterHandler("tmpget", \&TmpGetHandle
 # Side Effects:  # Side Effects:
 #   A file is deleted  #   A file is deleted
 #   A reply is sent to the client.  #   A reply is sent to the client.
 sub TmpDelHandler {  sub tmp_del_handler {
     my $cmd      = shift;      my ($cmd, $id, $client) = @_;
     my $id       = shift;      
     my $client   = shift;  
   
     my $userinput= "$cmd:$id";      my $userinput= "$cmd:$id";
       
     chomp($id);      chomp($id);
     $id=~s/\W/\_/g;      $id=~s/\W/\_/g;
     my $execdir=$perlvar{'lonDaemons'};      my $execdir=$perlvar{'lonDaemons'};
     if (unlink("$execdir/tmp/$id.tmp")) {      if (unlink("$execdir/tmp/$id.tmp")) {
  Reply($client, "ok\n", $userinput);   &Reply($client, "ok\n", $userinput);
     } else {      } else {
  Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".   &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ".
  "while attempting tmpdel\n", $userinput);    "while attempting tmpdel\n", $userinput);
     }      }
       
     return 1;      return 1;
   
 }  }
 RegisterHandler("tmpdel", \&TmpDelHandler, 0, 1, 0);  &register_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
 #  
 #   ls  - list the contents of a directory.  For each file in the  
 #    selected directory the filename followed by the full output of  
 #    the stat function is returned.  The returned info for each  
 #    file are separated by ':'.  The stat fields are separated by &'s.  
 # Parameters:  
 #    $cmd        - The command that dispatched us (ls).  
 #    $ulsdir     - The directory path to list... I'm not sure what this  
 #                  is relative as things like ls:. return e.g.  
 #                  no_such_dir.  
 #    $client     - Socket open on the client.  
 # Returns:  
 #     1 - indicating that the daemon should not disconnect.  
 # Side Effects:  
 #   The reply is written to  $client.  
 #  
 sub LsHandler {  
     my $cmd     = shift;  
     my $ulsdir  = shift;  
     my $client  = shift;  
   
     my $userinput = "$cmd:$ulsdir";  
   
     my $ulsout='';  
     my $ulsfn;  
     if (-e $ulsdir) {  
  if(-d $ulsdir) {  
     if (opendir(LSDIR,$ulsdir)) {  
  while ($ulsfn=readdir(LSDIR)) {  
     my @ulsstats=stat($ulsdir.'/'.$ulsfn);  
     $ulsout.=$ulsfn.'&'.  
  join('&',@ulsstats).':';  
  }  
  closedir(LSDIR);  
     }  
  } else {  
     my @ulsstats=stat($ulsdir);  
     $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';  
  }  
     } else {  
  $ulsout='no_such_dir';  
     }  
     if ($ulsout eq '') { $ulsout='empty'; }  
     Reply($client, "$ulsout\n", $userinput);  
   
   
     return 1;  
 }  
 RegisterHandler("ls", \&LsHandler, 0, 1, 0);  
   
   
 #  #
 #   Processes the setannounce command.  This command  #   Processes the setannounce command.  This command
Line 2645  RegisterHandler("ls", \&LsHandler, 0, 1, Line 3506  RegisterHandler("ls", \&LsHandler, 0, 1,
 #   The file {DocRoot}/announcement.txt is created.  #   The file {DocRoot}/announcement.txt is created.
 #   A reply is sent to $client.  #   A reply is sent to $client.
 #  #
 sub SetAnnounceHandler {  sub set_announce_handler {
     my $cmd          = shift;      my ($cmd, $announcement, $client) = @_;
     my $announcement = shift;  
     my $client       = shift;  
       
     my $userinput    = "$cmd:$announcement";      my $userinput    = "$cmd:$announcement";
   
Line 2658  sub SetAnnounceHandler { Line 3517  sub SetAnnounceHandler {
  '/announcement.txt')) {   '/announcement.txt')) {
  print $store $announcement;   print $store $announcement;
  close $store;   close $store;
  Reply($client, "ok\n", $userinput);   &Reply($client, "ok\n", $userinput);
     } else {      } else {
  Failure($client, "error: ".($!+0)."\n", $userinput);   &Failure($client, "error: ".($!+0)."\n", $userinput);
     }      }
   
     return 1;      return 1;
 }  }
 RegisterHandler("setannounce", \&SetAnnounceHandler, 0, 1, 0);  &register_handler("setannounce", \&set_announce_handler, 0, 1, 0);
   
 #  #
 #  Return the version of the daemon.  This can be used to determine  #  Return the version of the daemon.  This can be used to determine
Line 2680  RegisterHandler("setannounce", \&SetAnno Line 3539  RegisterHandler("setannounce", \&SetAnno
 #   1 - continue processing requests.  #   1 - continue processing requests.
 # Side Effects:  # Side Effects:
 #   Replies with version to $client.  #   Replies with version to $client.
 sub GetVersionHandler {  sub get_version_handler {
     my $client     = shift;      my ($cmd, $tail, $client) = @_;
     my $tail       = shift;  
     my $client     = shift;      my $userinput  = $cmd.$tail;
     my $userinput  = $client;  
           
     Reply($client, &version($userinput)."\n", $userinput);      &Reply($client, &version($userinput)."\n", $userinput);
   
   
     return 1;      return 1;
 }  }
 RegisterHandler("version", \&GetVersionHandler, 0, 1, 0);  &register_handler("version", \&get_version_handler, 0, 1, 0);
   
 #  Set the current host and domain.  This is used to support  #  Set the current host and domain.  This is used to support
 #  multihomed systems.  Each IP of the system, or even separate daemons  #  multihomed systems.  Each IP of the system, or even separate daemons
Line 2710  RegisterHandler("version", \&GetVersionH Line 3568  RegisterHandler("version", \&GetVersionH
 #     The default domain/system context is modified for this daemon.  #     The default domain/system context is modified for this daemon.
 #     a reply is sent to the client.  #     a reply is sent to the client.
 #  #
 sub SelectHostHandler {  sub set_virtual_host_handler {
     my $cmd        = shift;      my ($cmd, $tail, $socket) = @_;
     my $tail       = shift;  
     my $socket     = shift;  
       
     my $userinput  ="$cmd:$tail";      my $userinput  ="$cmd:$tail";
   
     Reply($client, &sethost($userinput)."\n", $userinput);      &Reply($client, &sethost($userinput)."\n", $userinput);
   
   
     return 1;      return 1;
 }  }
 RegisterHandler("sethost", \&SelectHostHandler, 0, 1, 0);  &register_handler("sethost", \&set_virtual_host_handler, 0, 1, 0);
   
 #  Process a request to exit:  #  Process a request to exit:
 #   - "bye" is sent to the client.  #   - "bye" is sent to the client.
Line 2735  RegisterHandler("sethost", \&SelectHostH Line 3591  RegisterHandler("sethost", \&SelectHostH
 # Returns:  # Returns:
 #   0      - Indicating the program should exit!!  #   0      - Indicating the program should exit!!
 #  #
 sub ExitHandler {  sub exit_handler {
     my $cmd     = shift;      my ($cmd, $tail, $client) = @_;
     my $tail    = shift;  
     my $client  = shift;  
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     &logthis("Client $clientip ($clientname) hanging up: $userinput");      &logthis("Client $clientip ($clientname) hanging up: $userinput");
     Reply($client, "bye\n", $userinput);      &Reply($client, "bye\n", $userinput);
     $client->shutdown(2);        # shutdown the socket forcibly.      $client->shutdown(2);        # shutdown the socket forcibly.
     $client->close();      $client->close();
   
     return 0;      return 0;
 }  }
 RegisterHandler("exit", \&ExitHandler, 0, 1,1);  &register_handler("exit", \&exit_handler, 0,1,1);
 RegisterHandler("init", \&ExitHandler, 0, 1,1); # RE-init is like exit.  &register_handler("init", \&exit_handler, 0,1,1);
 RegisterHandler("quit", \&ExitHandler, 0, 1,1); # I like this too!  &register_handler("quit", \&exit_handler, 0,1,1);
 #------------------------------------------------------------------------------------  
 #  #  Determine if auto-enrollment is enabled.
 #   Process a Request.  Takes a request from the client validates  #  Note that the original had what I believe to be a defect.
 #   it and performs the operation requested by it.  Returns  #  The original returned 0 if the requestor was not a registerd client.
 #   a response to the client.  #  It should return "refused".
 #  # Formal Parameters:
 #  Parameters:  #   $cmd       - The command that invoked us.
 #      request      - A string containing the user's request.  #   $tail      - The tail of the command (Extra command parameters.
 #  Returns:  #   $client    - The socket open on the client that issued the request.
 #      0            - Requested to exit, caller should shut down.  # Returns:
 #      1            - Accept additional requests from the client.  #    1         - Indicating processing should continue.
 #  #
 sub ProcessRequest {  sub enrollment_enabled_handler {
     my $Request      = shift;      my ($cmd, $tail, $client) = @_;
     my $KeepGoing    = 1; # Assume we're not asked to stop.      my $userinput = $cmd.":".$tail; # For logging purposes.
       
     my $wasenc=0;  
     my $userinput = $Request;   # for compatibility with oldcode <yeach>  
   
       
       my $cdom = split(/:/, $tail);   # Domain we're asking about.
       my $outcome  = &localenroll::run($cdom);
       &Reply($client, "$outcome\n", $userinput);
   
 # ------------------------------------------------------------ See if encrypted      return 1;
      }
     if($userinput =~ /^enc/) {  &register_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
  $wasenc = 1;  
  $userinput = Decipher($userinput);  
  if(! $userinput) {  
     Failure($client,"error:Encrypted data without negotiating key");  
     return 0;                      # Break off with this imposter.  
  }  
     }  
     # Split off the request keyword from the rest of the stuff.  
      
     my ($command, $tail) = split(/:/, $userinput, 2);  
   
     Debug("Command received: $command, encoded = $wasenc");  #   Get the official sections for which auto-enrollment is possible.
   #   Since the admin people won't know about 'unofficial sections' 
   #   we cannot auto-enroll on them.
   # Formal Parameters:
   #    $cmd     - The command request that got us dispatched here.
   #    $tail    - The remainder of the request.  In our case this
   #               will be split into:
   #               $coursecode   - The course name from the admin point of view.
   #               $cdom         - The course's domain(?).
   #    $client  - Socket open on the client.
   # Returns:
   #    1    - Indiciting processing should continue.
   #
   sub get_sections_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
   
          my ($coursecode, $cdom) = split(/:/, $tail);
 # ------------------------------------------------------------- Normal commands      my @secs = &localenroll::get_sections($coursecode,$cdom);
       my $seclist = &escape(join(':',@secs));
   
     #       &Reply($client, "$seclist\n", $userinput);
     #   If the command is in the hash, then execute it via the hash dispatch:      
     #  
     if(defined $Dispatcher{$command}) {  
   
  my $DispatchInfo = $Dispatcher{$command};      return 1;
  my $Handler      = $$DispatchInfo[0];  }
  my $NeedEncode   = $$DispatchInfo[1];  &register_handler("autogetsections", \&get_sections_handler, 0, 1, 0);
  my $ClientTypes  = $$DispatchInfo[2];  
  Debug("Matched dispatch hash: mustencode: $NeedEncode ClientType $ClientTypes");  
         
  #  Validate the request:  
         
  my $ok = 1;  
  my $requesterprivs = 0;  
  if(isClient()) {  
     $requesterprivs |= $CLIENT_OK;  
  }  
  if(isManager()) {  
     $requesterprivs |= $MANAGER_OK;  
  }  
  if($NeedEncode && (!$wasenc)) {  
     Debug("Must encode but wasn't: $NeedEncode $wasenc");  
     $ok = 0;  
  }  
  if(($ClientTypes & $requesterprivs) == 0) {  
     Debug("Client not privileged to do this operation");  
     $ok = 0;  
  }  
   
  if($ok) {  #   Validate the owner of a new course section.  
     Debug("Dispatching to handler $command $tail");  #
     $KeepGoing = &$Handler($command, $tail, $client);  # Formal Parameters:
  } else {  #   $cmd      - Command that got us dispatched.
     Debug("Refusing to dispatch because ok is false");  #   $tail     - the remainder of the command.  For us this consists of a
     Failure($client, "refused", $userinput);  #               colon separated string containing:
  }  #                  $inst    - Course Id from the institutions point of view.
   #                  $owner   - Proposed owner of the course.
   #                  $cdom    - Domain of the course (from the institutions
   #                             point of view?)..
   #   $client   - Socket open on the client.
   #
   # Returns:
   #   1        - Processing should continue.
   #
   sub validate_course_owner_handler {
       my ($cmd, $tail, $client)  = @_;
       my $userinput = "$cmd:$tail";
       my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
   
       my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
       &Reply($client, "$outcome\n", $userinput);
   
 # ------------------------------------------------------------- unknown command  
   
     } else {  
  # unknown command  
  Failure($client, "unknown_cmd\n", $userinput);  
     }  
   
     return $KeepGoing;      return 1;
 }  }
   &register_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);
   
 #  #
 #   GetCertificate: Given a transaction that requires a certificate,  #   Validate a course section in the official schedule of classes
 #   this function will extract the certificate from the transaction  #   from the institutions point of view (part of autoenrollment).
 #   request.  Note that at this point, the only concept of a certificate  
 #   is the hostname to which we are connected.  
 #  #
 #   Parameter:  # Formal Parameters:
 #      request   - The request sent by our client (this parameterization may  #   $cmd          - The command request that got us dispatched.
 #                  need to change when we really use a certificate granting  #   $tail         - The tail of the command.  In this case,
 #                  authority.  #                   this is a colon separated set of words that will be split
   #                   into:
   #                        $inst_course_id - The course/section id from the
   #                                          institutions point of view.
   #                        $cdom           - The domain from the institutions
   #                                          point of view.
   #   $client       - Socket open on the client.
   # Returns:
   #    1           - Indicating processing should continue.
 #  #
 sub GetCertificate {  sub validate_course_section_handler {
     my $request = shift;      my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my ($inst_course_id, $cdom) = split(/:/, $tail);
   
     return $clientip;      my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
 }      &Reply($client, "$outcome\n", $userinput);
   
   
       return 1;
   }
   &register_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
   
 #  #
 #   ReadManagerTable: Reads in the current manager table. For now this is  #   Create a password for a new auto-enrollment user.
 #                     done on each manager authentication because:  #   I think/guess, this password allows access to the institutions 
 #                     - These authentications are not frequent  #   AIS class list server/services.  Stuart can correct this comment
 #                     - This allows dynamic changes to the manager table  #   when he finds out how wrong I am.
 #                       without the need to signal to the lond.  #
   # Formal Parameters:
   #    $cmd     - The command request that got us dispatched.
   #    $tail    - The tail of the command.   In this case this is a colon separated
   #               set of words that will be split into:
   #               $authparam - An authentication parameter (username??).
   #               $cdom      - The domain of the course from the institution's
   #                            point of view.
   #    $client  - The socket open on the client.
   # Returns:
   #    1 - continue processing.
 #  #
   sub create_auto_enroll_password_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
   
 sub ReadManagerTable {      my ($authparam, $cdom) = split(/:/, $userinput);
   
     #   Clean out the old table first..      my ($create_passwd,$authchk);
       ($authparam,
        $create_passwd,
        $authchk) = &localenroll::create_password($authparam,$cdom);
   
     foreach my $key (keys %managers) {      &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n",
  delete $managers{$key};     $userinput);
     }  
   
     my $tablename = $perlvar{'lonTabDir'}."/managers.tab";  
     if (!open (MANAGERS, $tablename)) {      return 1;
  logthis('<font color="red">No manager table.  Nobody can manage!!</font>');  
  return;  
     }  
     while(my $host = <MANAGERS>) {  
  chomp($host);  
  if ($host =~ "^#") {                  # Comment line.  
     logthis('<font color="green"> Skipping line: '. "$host</font>\n");  
     next;  
  }  
  if (!defined $hostip{$host}) { # This is a non cluster member  
     #  The entry is of the form:  
     #    cluname:hostname  
     #  cluname - A 'cluster hostname' is needed in order to negotiate  
     #            the host key.  
     #  hostname- The dns name of the host.  
     #  
     my($cluname, $dnsname) = split(/:/, $host);  
       
     my $ip = gethostbyname($dnsname);  
     if(defined($ip)) {                 # bad names don't deserve entry.  
  my $hostip = inet_ntoa($ip);  
  $managers{$hostip} = $cluname;  
  logthis('<font color="green"> registering manager '.  
  "$dnsname as $cluname with $hostip </font>\n");  
     }  
  } else {  
     logthis('<font color="green"> existing host'." $host</font>\n");  
     $managers{$hostip{$host}} = $host;  # Use info from cluster tab if clumemeber  
  }  
     }  
 }  }
   &register_handler("autocreatepassword", \&create_auto_enroll_password_handler, 
     0, 1, 0);
   
   #   Retrieve and remove temporary files created by/during autoenrollment.
 #  #
 #  ValidManager: Determines if a given certificate represents a valid manager.  # Formal Parameters:
 #                in this primitive implementation, the 'certificate' is  #    $cmd      - The command that got us dispatched.
 #                just the connecting loncapa client name.  This is checked  #    $tail     - The tail of the command.  In our case this is a colon 
 #                against a valid client list in the configuration.  #                separated list that will be split into:
   #                $filename - The name of the file to remove.
   #                            The filename is given as a path relative to
   #                            the LonCAPA temp file directory.
   #    $client   - Socket open on the client.
 #  #
 #                    # Returns:
 sub ValidManager {  #   1     - Continue processing.
     my $certificate = shift;   sub retrieve_auto_file_handler {
       my ($cmd, $tail, $client)    = @_;
       my $userinput                = "cmd:$tail";
   
       my ($filename)   = split(/:/, $tail);
   
       my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
       if ( (-e $source) && ($filename ne '') ) {
    my $reply = '';
    if (open(my $fh,$source)) {
       while (<$fh>) {
    chomp($_);
    $_ =~ s/^\s+//g;
    $_ =~ s/\s+$//g;
    $reply .= $_;
       }
       close($fh);
       &Reply($client, &escape($reply)."\n", $userinput);
   
     return isManager;  #   Does this have to be uncommented??!?  (RF).
 }  
 #  
 #  CopyFile:  Called as part of the process of installing a   
 #             new configuration file.  This function copies an existing  
 #             file to a backup file.  
 # Parameters:  
 #     oldfile  - Name of the file to backup.  
 #     newfile  - Name of the backup file.  
 # Return:  
 #     0   - Failure (errno has failure reason).  
 #     1   - Success.  
 #  #
 sub CopyFile {  #                                unlink($source);
     my $oldfile = shift;   } else {
     my $newfile = shift;      &Failure($client, "error\n", $userinput);
   
     #  The file must exist:  
   
     if(-e $oldfile) {  
   
  # Read the old file.  
   
  my $oldfh = IO::File->new("< $oldfile");  
  if(!$oldfh) {  
     return 0;  
  }  
  my @contents = <$oldfh>;  # Suck in the entire file.  
   
  # write the backup file:  
   
  my $newfh = IO::File->new("> $newfile");  
  if(!(defined $newfh)){  
     return 0;  
  }  
  my $lines = scalar @contents;  
  for (my $i =0; $i < $lines; $i++) {  
     print $newfh ($contents[$i]);  
  }   }
   
  $oldfh->close;  
  $newfh->close;  
   
  chmod(0660, $newfile);  
   
  return 1;  
       
     } else {      } else {
  return 0;   &Failure($client, "error\n", $userinput);
     }      }
       
   
       return 1;
 }  }
   &register_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
   
 #  #
 #  Host files are passed out with externally visible host IPs.  #   Read and retrieve institutional code format (for support form).
 #  If, for example, we are behind a fire-wall or NAT host, our   # Formal Parameters:
 #  internally visible IP may be different than the externally  #    $cmd        - Command that dispatched us.
 #  visible IP.  Therefore, we always adjust the contents of the  #    $tail       - Tail of the command.  In this case it conatins 
 #  host file so that the entry for ME is the IP that we believe  #                  the course domain and the coursename.
 #  we have.  At present, this is defined as the entry that  #    $client     - Socket open on the client.
 #  DNS has for us.  If by some chance we are not able to get a  
 #  DNS translation for us, then we assume that the host.tab file  
 #  is correct.    
 #    BUGBUGBUG - in the future, we really should see if we can  
 #       easily query the interface(s) instead.  
 # Parameter(s):  
 #     contents    - The contents of the host.tab to check.  
 # Returns:  # Returns:
 #     newcontents - The adjusted contents.  #    1     - Continue processing.
 #  #
   sub get_institutional_code_format_handler {
       my ($cmd, $tail, $client)   = @_;
       my $userinput               = "$cmd:$tail";
   
       my $reply;
       my($cdom,$course) = split(/:/,$tail);
       my @pairs = split/\&/,$course;
       my %instcodes = ();
       my %codes = ();
       my @codetitles = ();
       my %cat_titles = ();
       my %cat_order = ();
       foreach (@pairs) {
    my ($key,$value) = split/=/,$_;
    $instcodes{&unescape($key)} = &unescape($value);
       }
       my $formatreply = &localenroll::instcode_format($cdom,
       \%instcodes,
       \%codes,
       \@codetitles,
       \%cat_titles,
       \%cat_order);
       if ($formatreply eq 'ok') {
    my $codes_str = &hash2str(%codes);
    my $codetitles_str = &array2str(@codetitles);
    my $cat_titles_str = &hash2str(%cat_titles);
    my $cat_order_str = &hash2str(%cat_order);
    &Reply($client,
          $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
          .$cat_order_str."\n",
          $userinput);
       } else {
    # this else branch added by RF since if not ok, lonc will
    # hang waiting on reply until timeout.
    #
    &Reply($client, "format_error\n", $userinput);
       }
       
       return 1;
   }
   &register_handler("autoinstcodeformat",
     \&get_institutional_code_format_handler,0,1,0);
   
 #  #
 sub AdjustHostContents {  # Gets a student's photo to exist (in the correct image type) in the user's 
     my $contents  = shift;  # directory.
     my $adjusted;  # Formal Parameters:
     my $me        = $perlvar{'lonHostID'};  #    $cmd     - The command request that got us dispatched.
   #    $tail    - A colon separated set of words that will be split into:
   #               $domain - student's domain
   #               $uname  - student username
   #               $type   - image type desired
   #    $client  - The socket open on the client.
   # Returns:
   #    1 - continue processing.
   sub student_photo_handler {
       my ($cmd, $tail, $client) = @_;
       my ($domain,$uname,$type) = split(/:/, $tail);
   
       my $path=&propath($domain,$uname).
    '/userfiles/internal/studentphoto.'.$type;
       if (-e $path) {
    &Reply($client,"ok\n","$cmd:$tail");
    return 1;
       }
       &mkpath($path);
       my $file=&localstudentphoto::fetch($domain,$uname);
       if (!$file) {
    &Failure($client,"unavailable\n","$cmd:$tail");
    return 1;
       }
       if (!-e $path) { &convert_photo($file,$path); }
       if (-e $path) {
    &Reply($client,"ok\n","$cmd:$tail");
    return 1;
       }
       &Failure($client,"unable_to_convert\n","$cmd:$tail");
       return 1;
   }
   &register_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
   
     foreach my $line (split(/\n/,$contents)) {  # mkpath makes all directories for a file, expects an absolute path with a
  if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {  # file or a trailing / if just a dir is passed
     chomp($line);  # returns 1 on success 0 on failure
     my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);  sub mkpath {
     if ($id eq $me) {      my ($file)=@_;
  my $ip = gethostbyname($name);      my @parts=split(/\//,$file,-1);
  my $ipnew = inet_ntoa($ip);      my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
  $ip = $ipnew;      for (my $i=3;$i<= ($#parts-1);$i++) {
  #  Reconstruct the host line and append to adjusted:   $now.='/'.$parts[$i]; 
    if (!-e $now) {
  my $newline = "$id:$domain:$role:$name:$ip";      if  (!mkdir($now,0770)) { return 0; }
  if($maxcon ne "") { # Not all hosts have loncnew tuning params  
     $newline .= ":$maxcon:$idleto:$mincon";  
  }  
  $adjusted .= $newline."\n";  
   
     } else { # Not me, pass unmodified.  
  $adjusted .= $line."\n";  
     }  
  } else {                  # Blank or comment never re-written.  
     $adjusted .= $line."\n"; # Pass blanks and comments as is.  
  }   }
     }      }
     return $adjusted;      return 1;
 }  }
   
   #---------------------------------------------------------------
 #  #
 #   InstallFile: Called to install an administrative file:  #   Getting, decoding and dispatching requests:
 #       - The file is created with <name>.tmp  
 #       - The <name>.tmp file is then mv'd to <name>  
 #   This lugubrious procedure is done to ensure that we are never without  
 #   a valid, even if dated, version of the file regardless of who crashes  
 #   and when the crash occurs.  
 #  #
 #  Parameters:  
 #       Name of the file  
 #       File Contents.  
 #  Return:  
 #      nonzero - success.  
 #      0       - failure and $! has an errno.  
 #  #
 sub InstallFile {  #   Get a Request:
     my $Filename = shift;  #   Gets a Request message from the client.  The transaction
     my $Contents = shift;  #   is defined as a 'line' of text.  We remove the new line
     my $TempFile = $Filename.".tmp";  #   from the text line.  
   #
     #  Open the file for write:  sub get_request {
           my $input = <$client>;
     my $fh = IO::File->new("> $TempFile"); # Write to temp.      chomp($input);
     if(!(defined $fh)) {  
  &logthis('<font color="red"> Unable to create '.$TempFile."</font>");  
  return 0;  
     }  
     #  write the contents of the file:  
       
     print $fh ($Contents);   
     $fh->close; # In case we ever have a filesystem w. locking  
   
     chmod(0660, $TempFile);      &Debug("get_request: Request = $input\n");
   
     # Now we can move install the file in position.      &status('Processing '.$clientname.':'.$input);
       
     move($TempFile, $Filename);  
   
     return 1;      return $input;
 }  }
   #---------------------------------------------------------------
 #  #
 #   ConfigFileFromSelector: converts a configuration file selector  #  Process a request.  This sub should shrink as each action
 #                 (one of host or domain at this point) into a   #  gets farmed out into a separat sub that is registered 
 #                 configuration file pathname.  #  with the dispatch hash.  
 #  #
 #  Parameters:  # Parameters:
 #      selector  - Configuration file selector.  #    user_input   - The request received from the client (lonc).
 #  Returns:  # Returns:
 #      Full path to the file or undef if the selector is invalid.  #    true to keep processing, false if caller should exit.
 #  #
 sub ConfigFileFromSelector {  sub process_request {
     my $selector   = shift;      my ($userinput) = @_;      # Easier for now to break style than to
     my $tablefile;                                  # fix all the userinput -> user_input.
       my $wasenc    = 0; # True if request was encrypted.
     my $tabledir = $perlvar{'lonTabDir'}.'/';  # ------------------------------------------------------------ See if encrypted
     if ($selector eq "hosts") {      if ($userinput =~ /^enc/) {
  $tablefile = $tabledir."hosts.tab";   $userinput = decipher($userinput);
     } elsif ($selector eq "domain") {   $wasenc=1;
  $tablefile = $tabledir."domain.tab";   if(!$userinput) { # Cipher not defined.
     } else {      &Failure($client, "error: Encrypted data without negotated key\n");
  return undef;      return 0;
    }
     }      }
     return $tablefile;      Debug("process_request: $userinput\n");
   
 }  
 #  
 #   PushFile:  Called to do an administrative push of a file.  
 #              - Ensure the file being pushed is one we support.  
 #              - Backup the old file to <filename.saved>  
 #              - Separate the contents of the new file out from the  
 #                rest of the request.  
 #              - Write the new file.  
 #  Parameter:  
 #     Request - The entire user request.  This consists of a : separated  
 #               string pushfile:tablename:contents.  
 #     NOTE:  The contents may have :'s in it as well making things a bit  
 #            more interesting... but not much.  
 #  Returns:  
 #     String to send to client ("ok" or "refused" if bad file).  
 #  
 sub PushFile {  
     my $request = shift;      
     my ($command, $filename, $contents) = split(":", $request, 3);  
           
     #  At this point in time, pushes for only the following tables are      #  
     #  supported:      #   The 'correct way' to add a command to lond is now to
     #   hosts.tab  ($filename eq host).      #   write a sub to execute it and Add it to the command dispatch
     #   domain.tab ($filename eq domain).      #   hash via a call to register_handler..  The comments to that
     # Construct the destination filename or reject the request.      #   sub should give you enough to go on to show how to do this
     #      #   along with the examples that are building up as this code
     # lonManage is supposed to ensure this, however this session could be      #   is getting refactored.   Until all branches of the
     # part of some elaborate spoof that managed somehow to authenticate.      #   if/elseif monster below have been factored out into
     #      #   separate procesor subs, if the dispatch hash is missing
       #   the command keyword, we will fall through to the remainder
       #   of the if/else chain below in order to keep this thing in 
       #   working order throughout the transmogrification.
   
     my $tablefile = ConfigFileFromSelector($filename);      my ($command, $tail) = split(/:/, $userinput, 2);
     if(! (defined $tablefile)) {      chomp($command);
  return "refused";      chomp($tail);
     }      $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet.
     #      $command =~ s/(\r)//; # And this too for parameterless commands.
     # >copy< the old table to the backup table      if(!$tail) {
     #        don't rename in case system crashes/reboots etc. in the time   $tail =""; # defined but blank.
     #        window between a rename and write.  
     #  
     my $backupfile = $tablefile;  
     $backupfile    =~ s/\.tab$/.old/;  
     if(!CopyFile($tablefile, $backupfile)) {  
  &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");  
  return "error:$!";  
     }      }
     &logthis('<font color="green"> Pushfile: backed up '  
      .$tablefile." to $backupfile</font>");  
       
     #  If the file being pushed is the host file, we adjust the entry for ourself so that the  
     #  IP will be our current IP as looked up in dns.  Note this is only 99% good as it's possible  
     #  to conceive of conditions where we don't have a DNS entry locally.  This is possible in a   
     #  network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)  
     #  that possibilty.  
   
     if($filename eq "host") {      &Debug("Command received: $command, encoded = $wasenc");
  $contents = AdjustHostContents($contents);  
     }  
   
     #  Install the new file:      if(defined $Dispatcher{$command}) {
   
     if(!InstallFile($tablefile, $contents)) {   my $dispatch_info = $Dispatcher{$command};
  &logthis('<font color="red"> Pushfile: unable to install '   my $handler       = $$dispatch_info[0];
  .$tablefile." $! </font>");   my $need_encode   = $$dispatch_info[1];
  return "error:$!";   my $client_types  = $$dispatch_info[2];
     } else {   Debug("Matched dispatch hash: mustencode: $need_encode "
  &logthis('<font color="green"> Installed new '.$tablefile        ."ClientType $client_types");
  ."</font>");        
    #  Validate the request:
     }        
    my $ok = 1;
    my $requesterprivs = 0;
    if(&isClient()) {
       $requesterprivs |= $CLIENT_OK;
    }
    if(&isManager()) {
       $requesterprivs |= $MANAGER_OK;
    }
    if($need_encode && (!$wasenc)) {
       Debug("Must encode but wasn't: $need_encode $wasenc");
       $ok = 0;
    }
    if(($client_types & $requesterprivs) == 0) {
       Debug("Client not privileged to do this operation");
       $ok = 0;
    }
   
    if($ok) {
       Debug("Dispatching to handler $command $tail");
       my $keep_going = &$handler($command, $tail, $client);
       return $keep_going;
    } else {
       Debug("Refusing to dispatch because client did not match requirements");
       Failure($client, "refused\n", $userinput);
       return 1;
    }
   
     #  Indicate success:      }    
    
     return "ok";  
   
       print $client "unknown_cmd\n";
   # -------------------------------------------------------------------- complete
       Debug("process_request - returning 1");
       return 1;
 }  }
   
 #  
 #  Called to re-init either lonc or lond.  
 #  #
   #   Decipher encoded traffic
 #  Parameters:  #  Parameters:
 #    request   - The full request by the client.  This is of the form  #     input      - Encoded data.
 #                reinit:<process>    
 #                where <process> is allowed to be either of   
 #                lonc or lond  
 #  
 #  Returns:  #  Returns:
 #     The string to be sent back to the client either:  #     Decoded data or undef if encryption key was not yet negotiated.
 #   ok         - Everything worked just fine.  #  Implicit input:
 #   error:why  - There was a failure and why describes the reason.  #     cipher  - This global holds the negotiated encryption key.
 #  
 #  
 sub ReinitProcess {  
     my $request = shift;  
   
   
     # separate the request (reinit) from the process identifier and  
     # validate it producing the name of the .pid file for the process.  
     #  
     #  
     my ($junk, $process) = split(":", $request);  
     my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';  
     if($process eq 'lonc') {  
  $processpidfile = $processpidfile."lonc.pid";  
  if (!open(PIDFILE, "< $processpidfile")) {  
     return "error:Open failed for $processpidfile";  
  }  
  my $loncpid = <PIDFILE>;  
  close(PIDFILE);  
  logthis('<font color="red"> Reinitializing lonc pid='.$loncpid  
  ."</font>");  
  kill("USR2", $loncpid);  
     } elsif ($process eq 'lond') {  
  logthis('<font color="red"> Reinitializing self (lond) </font>');  
  &UpdateHosts; # Lond is us!!  
     } else {  
  &logthis('<font color="yellow" Invalid reinit request for '.$process  
  ."</font>");  
  return "error:Invalid process identifier $process";  
     }  
     return 'ok';  
 }  
 #   Validate a line in a configuration file edit script:  
 #   Validation includes:  
 #     - Ensuring the command is valid.  
 #     - Ensuring the command has sufficient parameters  
 #   Parameters:  
 #     scriptline - A line to validate (\n has been stripped for what it's worth).  
 #  
 #   Return:  
 #      0     - Invalid scriptline.  
 #      1     - Valid scriptline  
 #  NOTE:  
 #     Only the command syntax is checked, not the executability of the  
 #     command.  
 #  #
 sub isValidEditCommand {  sub decipher {
     my $scriptline = shift;      my ($input)  = @_;
       my $output = '';
     #   Line elements are pipe separated:  
   
     my ($command, $key, $newline)  = split(/\|/, $scriptline);  
     &logthis('<font color="green"> isValideditCommand checking: '.  
      "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");  
           
     if ($command eq "delete") {      
  #      if($cipher) {
  #   key with no newline.   my($enc, $enclength, $encinput) = split(/:/, $input);
  #   for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) {
  if( ($key eq "") || ($newline ne "")) {      $output .= 
     return 0; # Must have key but no newline.   $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16)));
  } else {  
     return 1; # Valid syntax.  
  }  
     } elsif ($command eq "replace") {  
  #  
  #   key and newline:  
  #  
  if (($key eq "") || ($newline eq "")) {  
     return 0;  
  } else {  
     return 1;  
  }  
     } elsif ($command eq "append") {  
  if (($key ne "") && ($newline eq "")) {  
     return 1;  
  } else {  
     return 0;  
  }   }
    return substr($output, 0, $enclength);
     } else {      } else {
  return 0; # Invalid command.   return undef;
     }      }
     return 0; # Should not get here!!!  
 }  }
   
 #  #
 #   ApplyEdit - Applies an edit command to a line in a configuration   #   Register a command processor.  This function is invoked to register a sub
 #               file.  It is the caller's responsiblity to validate the  #   to process a request.  Once registered, the ProcessRequest sub can automatically
 #               edit line.  #   dispatch requests to an appropriate sub, and do the top level validity checking
   #   as well:
   #    - Is the keyword recognized.
   #    - Is the proper client type attempting the request.
   #    - Is the request encrypted if it has to be.
 #   Parameters:  #   Parameters:
 #      $directive - A single edit directive to apply.    #    $request_name         - Name of the request being registered.
 #                   Edit directives are of the form:  #                           This is the command request that will match
 #                  append|newline      - Appends a new line to the file.  #                           against the hash keywords to lookup the information
 #                  replace|key|newline - Replaces the line with key value 'key'  #                           associated with the dispatch information.
 #                  delete|key          - Deletes the line with key value 'key'.  #    $procedure           - Reference to a sub to call to process the request.
 #      $editor   - A config file editor object that contains the  #                           All subs get called as follows:
 #                  file being edited.  #                             Procedure($cmd, $tail, $replyfd, $key)
   #                             $cmd    - the actual keyword that invoked us.
   #                             $tail   - the tail of the request that invoked us.
   #                             $replyfd- File descriptor connected to the client
   #    $must_encode          - True if the request must be encoded to be good.
   #    $client_ok            - True if it's ok for a client to request this.
   #    $manager_ok           - True if it's ok for a manager to request this.
   # Side effects:
   #      - On success, the Dispatcher hash has an entry added for the key $RequestName
   #      - On failure, the program will die as it's a bad internal bug to try to 
   #        register a duplicate command handler.
 #  #
 sub ApplyEdit {  sub register_handler {
     my $directive   = shift;      my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok)   = @_;
     my $editor      = shift;  
   
     # Break the directive down into its command and its parameters  
     # (at most two at this point.  The meaning of the parameters, if in fact  
     #  they exist depends on the command).  
   
     my ($command, $p1, $p2) = split(/\|/, $directive);  
   
     if($command eq "append") {      #  Don't allow duplication#
  $editor->Append($p1);          # p1 - key p2 null.     
     } elsif ($command eq "replace") {      if (defined $Dispatcher{$request_name}) {
  $editor->ReplaceLine($p1, $p2);   # p1 - key p2 = newline.   die "Attempting to define a duplicate request handler for $request_name\n";
     } elsif ($command eq "delete") {  
  $editor->DeleteLine($p1);         # p1 - key p2 null.  
     } else {          # Should not get here!!!  
  die "Invalid command given to ApplyEdit $command";  
     }      }
 }      #   Build the client type mask:
 #      
 # AdjustOurHost:      my $client_type_mask = 0;
 #           Adjusts a host file stored in a configuration file editor object      if($client_ok) {
 #           for the true IP address of this host. This is necessary for hosts   $client_type_mask  |= $CLIENT_OK;
 #           that live behind a firewall.  
 #           Those hosts have a publicly distributed IP of the firewall, but  
 #           internally must use their actual IP.  We assume that a given  
 #           host only has a single IP interface for now.  
 # Formal Parameters:  
 #     editor   - The configuration file editor to adjust.  This  
 #                editor is assumed to contain a hosts.tab file.  
 # Strategy:  
 #    - Figure out our hostname.  
 #    - Lookup the entry for this host.  
 #    - Modify the line to contain our IP  
 #    - Do a replace for this host.  
 sub AdjustOurHost {  
     my $editor        = shift;  
   
     # figure out who I am.  
   
     my $myHostName    = $perlvar{'lonHostID'}; # LonCAPA hostname.  
   
     #  Get my host file entry.  
   
     my $ConfigLine    = $editor->Find($myHostName);  
     if(! (defined $ConfigLine)) {  
  die "AdjustOurHost - no entry for me in hosts file $myHostName";  
     }      }
     # figure out my IP:      if($manager_ok) {
     #   Use the config line to get my hostname.   $client_type_mask  |= $MANAGER_OK;
     #   Use gethostbyname to translate that into an IP address.  
     #  
     my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);  
     my $BinaryIp = gethostbyname($name);  
     my $ip       = inet_ntoa($ip);  
     #  
     #  Reassemble the config line from the elements in the list.  
     #  Note that if the loncnew items were not present before, they will  
     #  be now even if they would be empty  
     #  
     my $newConfigLine = $id;  
     foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {  
  $newConfigLine .= ":".$item;  
     }      }
     #  Replace the line:     
       #  Enter the hash:
     $editor->ReplaceLine($id, $newConfigLine);        
           my @entry = ($procedure, $must_encode, $client_type_mask);
 }     
 #      $Dispatcher{$request_name} = \@entry;
 #   ReplaceConfigFile:     
 #              Replaces a configuration file with the contents of a  
 #              configuration file editor object.  
 #              This is done by:  
 #              - Copying the target file to <filename>.old  
 #              - Writing the new file to <filename>.tmp  
 #              - Moving <filename.tmp>  -> <filename>  
 #              This laborious process ensures that the system is never without  
 #              a configuration file that's at least valid (even if the contents  
 #              may be dated).  
 #   Parameters:  
 #        filename   - Name of the file to modify... this is a full path.  
 #        editor     - Editor containing the file.  
 #  
 sub ReplaceConfigFile {  
     my $filename  = shift;  
     my $editor    = shift;  
   
     CopyFile ($filename, $filename.".old");  
   
     my $contents  = $editor->Get(); # Get the contents of the file.  
   
     InstallFile($filename, $contents);  
 }  }
 #     
 #  
 #   Called to edit a configuration table  file  
 #   Parameters:  
 #      request           - The entire command/request sent by lonc or lonManage  
 #   Return:  
 #      The reply to send to the client.  
 #  
 sub EditFile {  
     my $request = shift;  
   
     #  Split the command into it's pieces:  edit:filetype:script  
   
     my ($request, $filetype, $script) = split(/:/, $request,3); # : in script  
   
     #  Check the pre-coditions for success:  #------------------------------------------------------------------
   
     if($request != "edit") { # Something is amiss afoot alack.  
  return "error:edit request detected, but request != 'edit'\n";  
     }  
     if( ($filetype ne "hosts")  &&  
  ($filetype ne "domain")) {  
  return "error:edit requested with invalid file specifier: $filetype \n";  
     }  
   
     #   Split the edit script and check it's validity.  
   
     my @scriptlines = split(/\n/, $script);  # one line per element.  
     my $linecount   = scalar(@scriptlines);  
     for(my $i = 0; $i < $linecount; $i++) {  
  chomp($scriptlines[$i]);  
  if(!isValidEditCommand($scriptlines[$i])) {  
     return "error:edit with bad script line: '$scriptlines[$i]' \n";  
  }  
     }  
   
     #   Execute the edit operation.  
     #   - Create a config file editor for the appropriate file and   
     #   - execute each command in the script:  
     #  
     my $configfile = ConfigFileFromSelector($filetype);  
     if (!(defined $configfile)) {  
  return "refused\n";  
     }  
     my $editor = ConfigFileEdit->new($configfile);  
   
     for (my $i = 0; $i < $linecount; $i++) {  
  ApplyEdit($scriptlines[$i], $editor);  
     }  
     # If the file is the host file, ensure that our host is  
     # adjusted to have our ip:  
     #  
     if($filetype eq "host") {  
  AdjustOurHost($editor);  
     }  
     #  Finally replace the current file with our file.  
     #  
     ReplaceConfigFile($configfile, $editor);  
   
     return "ok\n";  
 }  
 #  #
 #  Convert an error return code from lcpasswd to a string value.  #  Convert an error return code from lcpasswd to a string value.
 #  #
Line 3457  sub catchexception { Line 4139  sub catchexception {
     $SIG{'QUIT'}='DEFAULT';      $SIG{'QUIT'}='DEFAULT';
     $SIG{__DIE__}='DEFAULT';      $SIG{__DIE__}='DEFAULT';
     &status("Catching exception");      &status("Catching exception");
     &logthis("<font color=red>CRITICAL: "      &logthis("<font color='red'>CRITICAL: "
      ."ABNORMAL EXIT. Child $$ for server $thisserver died through "       ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
      ."a crash with this error msg->[$error]</font>");       ."a crash with this error msg->[$error]</font>");
     &logthis('Famous last words: '.$status.' - '.$lastlog);      &logthis('Famous last words: '.$status.' - '.$lastlog);
     if ($client) { print $client "error: $error\n"; }      if ($client) { print $client "error: $error\n"; }
     $server->close();      $server->close();
     die($error);      die($error);
 }  }
   
 sub timeout {  sub timeout {
     &status("Handling Timeout");      &status("Handling Timeout");
     &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");      &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
     &catchexception('Timeout');      &catchexception('Timeout');
 }  }
 # -------------------------------- Set signal handlers to record abnormal exits  # -------------------------------- Set signal handlers to record abnormal exits
   
   
 $SIG{'QUIT'}=\&catchexception;  $SIG{'QUIT'}=\&catchexception;
 $SIG{__DIE__}=\&catchexception;  $SIG{__DIE__}=\&catchexception;
   
Line 3485  undef $perlvarref; Line 4167  undef $perlvarref;
 # ----------------------------- Make sure this process is running from user=www  # ----------------------------- Make sure this process is running from user=www
 my $wwwid=getpwnam('www');  my $wwwid=getpwnam('www');
 if ($wwwid!=$<) {  if ($wwwid!=$<) {
     my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";     my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
     my $subj="LON: $currenthostid User ID mismatch";     my $subj="LON: $currenthostid User ID mismatch";
     system("echo 'User ID mismatch.  lond must be run as user www.' |\     system("echo 'User ID mismatch.  lond must be run as user www.' |\
  mailto $emailto -s '$subj' > /dev/null");   mailto $emailto -s '$subj' > /dev/null");
     exit 1;     exit 1;
 }  }
   
 # --------------------------------------------- Check if other instance running  # --------------------------------------------- Check if other instance running
Line 3497  if ($wwwid!=$<) { Line 4179  if ($wwwid!=$<) {
 my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";  my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
   
 if (-e $pidfile) {  if (-e $pidfile) {
     my $lfh=IO::File->new("$pidfile");     my $lfh=IO::File->new("$pidfile");
     my $pide=<$lfh>;     my $pide=<$lfh>;
     chomp($pide);     chomp($pide);
     if (kill 0 => $pide) { die "already running"; }     if (kill 0 => $pide) { die "already running"; }
 }  }
   
 # ------------------------------------------------------------- Read hosts file  # ------------------------------------------------------------- Read hosts file
Line 3513  $server = IO::Socket::INET->new(LocalPor Line 4195  $server = IO::Socket::INET->new(LocalPor
                                 Proto     => 'tcp',                                  Proto     => 'tcp',
                                 Reuse     => 1,                                  Reuse     => 1,
                                 Listen    => 10 )                                  Listen    => 10 )
     or die "making socket: $@\n";    or die "making socket: $@\n";
   
 # --------------------------------------------------------- Do global variables  # --------------------------------------------------------- Do global variables
   
 # global variables  # global variables
   
 my %children               = ();       # keys are current child process IDs  my %children               = ();       # keys are current child process IDs
 my $children               = 0;        # current number of children  
   
 sub REAPER {                        # takes care of dead children  sub REAPER {                        # takes care of dead children
     $SIG{CHLD} = \&REAPER;      $SIG{CHLD} = \&REAPER;
     &status("Handling child death");      &status("Handling child death");
     my $pid = wait;      my $pid;
     if (defined($children{$pid})) {      do {
  &logthis("Child $pid died");   $pid = waitpid(-1,&WNOHANG());
  $children --;   if (defined($children{$pid})) {
  delete $children{$pid};      &logthis("Child $pid died");
     } else {      delete($children{$pid});
  &logthis("Unknown Child $pid died");   } elsif ($pid > 0) {
       &logthis("Unknown Child $pid died");
    }
       } while ( $pid > 0 );
       foreach my $child (keys(%children)) {
    $pid = waitpid($child,&WNOHANG());
    if ($pid > 0) {
       &logthis("Child $child - $pid looks like we missed it's death");
       delete($children{$pid});
    }
     }      }
     &status("Finished Handling child death");      &status("Finished Handling child death");
 }  }
Line 3543  sub HUNTSMAN {                      # si Line 4233  sub HUNTSMAN {                      # si
     &logthis("Free socket: ".shutdown($server,2)); # free up socket      &logthis("Free socket: ".shutdown($server,2)); # free up socket
     my $execdir=$perlvar{'lonDaemons'};      my $execdir=$perlvar{'lonDaemons'};
     unlink("$execdir/logs/lond.pid");      unlink("$execdir/logs/lond.pid");
     &logthis("<font color=red>CRITICAL: Shutting down</font>");      &logthis("<font color='red'>CRITICAL: Shutting down</font>");
     &status("Done killing children");      &status("Done killing children");
     exit;                           # clean up with dignity      exit;                           # clean up with dignity
 }  }
Line 3553  sub HUPSMAN {                      # sig Line 4243  sub HUPSMAN {                      # sig
     &status("Killing children for restart (HUP)");      &status("Killing children for restart (HUP)");
     kill 'INT' => keys %children;      kill 'INT' => keys %children;
     &logthis("Free socket: ".shutdown($server,2)); # free up socket      &logthis("Free socket: ".shutdown($server,2)); # free up socket
     &logthis("<font color=red>CRITICAL: Restarting</font>");      &logthis("<font color='red'>CRITICAL: Restarting</font>");
     my $execdir=$perlvar{'lonDaemons'};      my $execdir=$perlvar{'lonDaemons'};
     unlink("$execdir/logs/lond.pid");      unlink("$execdir/logs/lond.pid");
     &status("Restarting self (HUP)");      &status("Restarting self (HUP)");
Line 3563  sub HUPSMAN {                      # sig Line 4253  sub HUPSMAN {                      # sig
 #  #
 #    Kill off hashes that describe the host table prior to re-reading it.  #    Kill off hashes that describe the host table prior to re-reading it.
 #    Hashes affected are:  #    Hashes affected are:
 #       %hostid, %hostdom %hostip  #       %hostid, %hostdom %hostip %hostdns.
 #  #
 sub KillHostHashes {  sub KillHostHashes {
     foreach my $key (keys %hostid) {      foreach my $key (keys %hostid) {
Line 3575  sub KillHostHashes { Line 4265  sub KillHostHashes {
     foreach my $key (keys %hostip) {      foreach my $key (keys %hostip) {
  delete $hostip{$key};   delete $hostip{$key};
     }      }
       foreach my $key (keys %hostdns) {
    delete $hostdns{$key};
       }
 }  }
 #  #
 #   Read in the host table from file and distribute it into the various hashes:  #   Read in the host table from file and distribute it into the various hashes:
Line 3585  sub KillHostHashes { Line 4278  sub KillHostHashes {
 sub ReadHostTable {  sub ReadHostTable {
   
     open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";      open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
           my $myloncapaname = $perlvar{'lonHostID'};
       Debug("My loncapa name is : $myloncapaname");
     while (my $configline=<CONFIG>) {      while (my $configline=<CONFIG>) {
  my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);   if (!($configline =~ /^\s*\#/)) {
  chomp($ip); $ip=~s/\D+$//;      my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
  $hostid{$ip}=$id;      chomp($ip); $ip=~s/\D+$//;
  $hostdom{$id}=$domain;      $hostid{$ip}=$id;         # LonCAPA name of host by IP.
  $hostip{$id}=$ip;      $hostdom{$id}=$domain;    # LonCAPA domain name of host. 
  if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }      $hostip{$id}=$ip;      # IP address of host.
       $hostdns{$name} = $id;    # LonCAPA name of host by DNS.
   
       if ($id eq $perlvar{'lonHostID'}) { 
    Debug("Found me in the host table: $name");
    $thisserver=$name; 
       }
    }
     }      }
     close(CONFIG);      close(CONFIG);
 }  }
Line 3654  sub checkchildren { Line 4355  sub checkchildren {
     &logthis('Going to check on the children');      &logthis('Going to check on the children');
     my $docdir=$perlvar{'lonDocRoot'};      my $docdir=$perlvar{'lonDocRoot'};
     foreach (sort keys %children) {      foreach (sort keys %children) {
  sleep 1;   #sleep 1;
         unless (kill 'USR1' => $_) {          unless (kill 'USR1' => $_) {
     &logthis ('Child '.$_.' is dead');      &logthis ('Child '.$_.' is dead');
             &logstatus($$.' is dead');              &logstatus($$.' is dead');
       delete($children{$_});
         }           } 
     }      }
     sleep 5;      sleep 5;
     $SIG{ALRM} = sub { die "timeout" };      $SIG{ALRM} = sub { Debug("timeout"); 
          die "timeout";  };
     $SIG{__DIE__} = 'DEFAULT';      $SIG{__DIE__} = 'DEFAULT';
     &status("Checking on the children (waiting for reports)");      &status("Checking on the children (waiting for reports)");
     foreach (sort keys %children) {      foreach (sort keys %children) {
         unless (-e "$docdir/lon-status/londchld/$_.txt") {          unless (-e "$docdir/lon-status/londchld/$_.txt") {
     eval {            eval {
  alarm(300);              alarm(300);
  &logthis('Child '.$_.' did not respond');      &logthis('Child '.$_.' did not respond');
  kill 9 => $_;      kill 9 => $_;
  #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";      #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
  #$subj="LON: $currenthostid killed lond process $_";      #$subj="LON: $currenthostid killed lond process $_";
  #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;      #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
  #$execdir=$perlvar{'lonDaemons'};      #$execdir=$perlvar{'lonDaemons'};
  #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;      #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
  alarm(0);      delete($children{$_});
     }      alarm(0);
     }
         }          }
     }      }
     $SIG{ALRM} = 'DEFAULT';      $SIG{ALRM} = 'DEFAULT';
     $SIG{__DIE__} = \&catchexception;      $SIG{__DIE__} = \&catchexception;
     &status("Finished checking children");      &status("Finished checking children");
       &logthis('Finished Checking children');
 }  }
   
 # --------------------------------------------------------------------- Logging  # --------------------------------------------------------------------- Logging
Line 3712  sub Debug { Line 4417  sub Debug {
 #     reply   - Text to send to client.  #     reply   - Text to send to client.
 #     request - Original request from client.  #     request - Original request from client.
 #  #
 #  Note: This increments Transactions  
 #  
 sub Reply {  sub Reply {
     alarm(120);      my ($fd, $reply, $request) = @_;
     my $fd      = shift;  
     my $reply   = shift;  
     my $request = shift;  
   
     print $fd $reply;      print $fd $reply;
     Debug("Request was $request  Reply was $reply");      Debug("Request was $request  Reply was $reply");
   
     $Transactions++;      $Transactions++;
     alarm(0);  
   
   
 }  }
   
   
 #  #
 #    Sub to report a failure.  #    Sub to report a failure.
 #    This function:  #    This function:
Line 3757  sub logstatus { Line 4457  sub logstatus {
     &status("Doing logging");      &status("Doing logging");
     my $docdir=$perlvar{'lonDocRoot'};      my $docdir=$perlvar{'lonDocRoot'};
     {      {
  my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");   my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
  print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";          print $fh $status."\n".$lastlog."\n".time."\n$keymode";
  $fh->close();          $fh->close();
     }      }
     &status("Finished londstatus.txt");      &status("Finished $$.txt");
     {      {
  my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");   open(LOG,">>$docdir/lon-status/londstatus.txt");
  print $fh $status."\n".$lastlog."\n".time;   flock(LOG,LOCK_EX);
  $fh->close();   print LOG $$."\t".$clientname."\t".$currenthostid."\t"
       .$status."\t".$lastlog."\t $keymode\n";
    flock(LOG,LOCK_UN);
    close(LOG);
     }      }
     ResetStatistics;  
     &status("Finished logging");      &status("Finished logging");
      
 }  }
   
 sub initnewstatus {  sub initnewstatus {
Line 3791  sub status { Line 4492  sub status {
     my $what=shift;      my $what=shift;
     my $now=time;      my $now=time;
     my $local=localtime($now);      my $local=localtime($now);
     my $status = "lond: $what $local ";      $status=$local.': '.$what;
     if($Transactions) {      $0='lond: '.$what.' '.$local;
  $status .= " Transactions: $Transactions Failed; $Failures";  
     }  
     $0=$status;  
 }  }
   
 # -------------------------------------------------------- Escape Special Chars  # -------------------------------------------------------- Escape Special Chars
Line 3827  sub reconlonc { Line 4525  sub reconlonc {
     &logthis("lonc at pid $loncpid responding, sending USR1");      &logthis("lonc at pid $loncpid responding, sending USR1");
             kill USR1 => $loncpid;              kill USR1 => $loncpid;
         } else {          } else {
     &logthis("<font color=red>CRITICAL: "      &logthis(
      ."lonc at pid $loncpid not responding, giving up</font>");                "<font color='red'>CRITICAL: "
                ."lonc at pid $loncpid not responding, giving up</font>");
         }          }
     } else {      } else {
  &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');        &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
     }      }
 }  }
   
Line 3843  sub subreply { Line 4542  sub subreply {
     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",      my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                                       Type    => SOCK_STREAM,                                        Type    => SOCK_STREAM,
                                       Timeout => 10)                                        Timeout => 10)
  or return "con_lost";         or return "con_lost";
     print $sclient "$cmd\n";      print $sclient "$cmd\n";
     my $answer=<$sclient>;      my $answer=<$sclient>;
     chomp($answer);      chomp($answer);
Line 3852  sub subreply { Line 4551  sub subreply {
 }  }
   
 sub reply {  sub reply {
     my ($cmd,$server)=@_;    my ($cmd,$server)=@_;
     my $answer;    my $answer;
     if ($server ne $currenthostid) {     if ($server ne $currenthostid) { 
  $answer=subreply($cmd,$server);      $answer=subreply($cmd,$server);
  if ($answer eq 'con_lost') {      if ($answer eq 'con_lost') {
     $answer=subreply("ping",$server);   $answer=subreply("ping",$server);
     if ($answer ne $server) {          if ($answer ne $server) {
  &logthis("sub reply: answer != server answer is $answer, server is $server");      &logthis("sub reply: answer != server answer is $answer, server is $server");
  &reconlonc("$perlvar{'lonSockDir'}/$server");             &reconlonc("$perlvar{'lonSockDir'}/$server");
     }          }
     $answer=subreply($cmd,$server);          $answer=subreply($cmd,$server);
  }      }
     } else {    } else {
  $answer='self_reply';      $answer='self_reply';
     }     } 
     return $answer;    return $answer;
 }  }
   
 # -------------------------------------------------------------- Talk to lonsql  # -------------------------------------------------------------- Talk to lonsql
   
 sub sqlreply {  sub sql_reply {
     my ($cmd)=@_;      my ($cmd)=@_;
     my $answer=subsqlreply($cmd);      my $answer=&sub_sql_reply($cmd);
     if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }      if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
     return $answer;      return $answer;
 }  }
   
 sub subsqlreply {  sub sub_sql_reply {
     my ($cmd)=@_;      my ($cmd)=@_;
     my $unixsock="mysqlsock";      my $unixsock="mysqlsock";
     my $peerfile="$perlvar{'lonSockDir'}/$unixsock";      my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",      my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                                       Type    => SOCK_STREAM,                                        Type    => SOCK_STREAM,
                                       Timeout => 10)                                        Timeout => 10)
  or return "con_lost";         or return "con_lost";
     print $sclient "$cmd\n";      print $sclient "$cmd\n";
     my $answer=<$sclient>;      my $answer=<$sclient>;
     chomp($answer);      chomp($answer);
Line 3935  my $execdir=$perlvar{'lonDaemons'}; Line 4634  my $execdir=$perlvar{'lonDaemons'};
 open (PIDSAVE,">$execdir/logs/lond.pid");  open (PIDSAVE,">$execdir/logs/lond.pid");
 print PIDSAVE "$$\n";  print PIDSAVE "$$\n";
 close(PIDSAVE);  close(PIDSAVE);
 &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");  &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
 &status('Starting');  &status('Starting');
   
   
Line 3953  $SIG{USR2} = \&UpdateHosts; Line 4652  $SIG{USR2} = \&UpdateHosts;
   
 ReadHostTable;  ReadHostTable;
   
   
 # --------------------------------------------------------------  # --------------------------------------------------------------
 #   Accept connections.  When a connection comes in, it is validated  #   Accept connections.  When a connection comes in, it is validated
 #   and if good, a child process is created to process transactions  #   and if good, a child process is created to process transactions
Line 3969  while (1) { Line 4667  while (1) {
   
 sub make_new_child {  sub make_new_child {
     my $pid;      my $pid;
   #    my $cipher;     # Now global
     my $sigset;      my $sigset;
   
     $client = shift;      $client = shift;
Line 3979  sub make_new_child { Line 4678  sub make_new_child {
     $sigset = POSIX::SigSet->new(SIGINT);      $sigset = POSIX::SigSet->new(SIGINT);
     sigprocmask(SIG_BLOCK, $sigset)      sigprocmask(SIG_BLOCK, $sigset)
         or die "Can't block SIGINT for fork: $!\n";          or die "Can't block SIGINT for fork: $!\n";
       
     die "fork: $!" unless defined ($pid = fork);      die "fork: $!" unless defined ($pid = fork);
   
     $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of      $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
Line 3990  sub make_new_child { Line 4689  sub make_new_child {
     #  the pid hash.      #  the pid hash.
     #      #
     my $caller = getpeername($client);      my $caller = getpeername($client);
     my ($port,$iaddr)=unpack_sockaddr_in($caller);      my ($port,$iaddr);
     $clientip=inet_ntoa($iaddr);      if (defined($caller) && length($caller) > 0) {
    ($port,$iaddr)=unpack_sockaddr_in($caller);
       } else {
    &logthis("Unable to determine who caller was, getpeername returned nothing");
       }
       if (defined($iaddr)) {
    $clientip  = inet_ntoa($iaddr);
    Debug("Connected with $clientip");
    $clientdns = gethostbyaddr($iaddr, AF_INET);
    Debug("Connected with $clientdns by name");
       } else {
    &logthis("Unable to determine clientip");
    $clientip='Unavailable';
       }
           
     if ($pid) {      if ($pid) {
         # Parent records the child's birth and returns.          # Parent records the child's birth and returns.
         sigprocmask(SIG_UNBLOCK, $sigset)          sigprocmask(SIG_UNBLOCK, $sigset)
             or die "Can't unblock SIGINT for fork: $!\n";              or die "Can't unblock SIGINT for fork: $!\n";
         $children{$pid} = $clientip;          $children{$pid} = $clientip;
         $children++;  
         &status('Started child '.$pid);          &status('Started child '.$pid);
         return;          return;
     } else {      } else {
Line 4015  sub make_new_child { Line 4726  sub make_new_child {
         sigprocmask(SIG_UNBLOCK, $sigset)          sigprocmask(SIG_UNBLOCK, $sigset)
             or die "Can't unblock SIGINT for fork: $!\n";              or die "Can't unblock SIGINT for fork: $!\n";
   
   #        my $tmpsnum=0;            # Now global
   #---------------------------------------------------- kerberos 5 initialization
         &Authen::Krb5::init_context();          &Authen::Krb5::init_context();
         &Authen::Krb5::init_ets();          &Authen::Krb5::init_ets();
   
  &status('Accepted connection');   &status('Accepted connection');
 # =============================================================================  # =============================================================================
             # do something with the connection              # do something with the connection
 # -----------------------------------------------------------------------------  # -----------------------------------------------------------------------------
  # see if we know client and check for spoof IP by challenge   # see if we know client and 'check' for spoof IP by ineffective challenge
   
  ReadManagerTable; # May also be a manager!!   ReadManagerTable; # May also be a manager!!
   
Line 4042  sub make_new_child { Line 4753  sub make_new_child {
     $clientname = $managers{$clientip};      $clientname = $managers{$clientip};
  }   }
  my $clientok;   my $clientok;
   
  if ($clientrec || $ismanager) {   if ($clientrec || $ismanager) {
     &status("Waiting for init from $clientip $clientname");      &status("Waiting for init from $clientip $clientname");
     &logthis('<font color="yellow">INFO: Connection, '.      &logthis('<font color="yellow">INFO: Connection, '.
      $clientip.       $clientip.
      " ($clientname) connection type = $ConnectionType </font>" );    " ($clientname) connection type = $ConnectionType </font>" );
     &status("Connecting $clientip  ($clientname))");       &status("Connecting $clientip  ($clientname))"); 
     my $remotereq=<$client>;      my $remotereq=<$client>;
     $remotereq=~s/[^\w:]//g;      chomp($remotereq);
       Debug("Got init: $remotereq");
       my $inikeyword = split(/:/, $remotereq);
     if ($remotereq =~ /^init/) {      if ($remotereq =~ /^init/) {
  &sethost("sethost:$perlvar{'lonHostID'}");   &sethost("sethost:$perlvar{'lonHostID'}");
  my $challenge="$$".time;   #
  print $client "$challenge\n";   #  If the remote is attempting a local init... give that a try:
  &status("Waiting for challenge reply from $clientip ($clientname)");    #
  $remotereq=<$client>;   my ($i, $inittype) = split(/:/, $remotereq);
  $remotereq=~s/\W//g;  
  if ($challenge eq $remotereq) {   # If the connection type is ssl, but I didn't get my
     $clientok=1;   # certificate files yet, then I'll drop  back to 
     print $client "ok\n";   # insecure (if allowed).
   
    if($inittype eq "ssl") {
       my ($ca, $cert) = lonssl::CertificateFile;
       my $kfile       = lonssl::KeyFile;
       if((!$ca)   || 
          (!$cert) || 
          (!$kfile)) {
    $inittype = ""; # This forces insecure attempt.
    &logthis("<font color=\"blue\"> Certificates not "
    ."installed -- trying insecure auth</font>");
       } else { # SSL certificates are in place so
       } # Leave the inittype alone.
    }
   
    if($inittype eq "local") {
       my $key = LocalConnection($client, $remotereq);
       if($key) {
    Debug("Got local key $key");
    $clientok     = 1;
    my $cipherkey = pack("H32", $key);
    $cipher       = new IDEA($cipherkey);
    print $client "ok:local\n";
    &logthis('<font color="green"'
    . "Successful local authentication </font>");
    $keymode = "local"
       } else {
    Debug("Failed to get local key");
    $clientok = 0;
    shutdown($client, 3);
    close $client;
       }
    } elsif ($inittype eq "ssl") {
       my $key = SSLConnection($client);
       if ($key) {
    $clientok = 1;
    my $cipherkey = pack("H32", $key);
    $cipher       = new IDEA($cipherkey);
    &logthis('<font color="green">'
    ."Successfull ssl authentication with $clientname </font>");
    $keymode = "ssl";
        
       } else {
    $clientok = 0;
    close $client;
       }
      
  } else {   } else {
     &logthis("<font color=blue>WARNING: $clientip did not reply challenge</font>");      my $ok = InsecureConnection($client);
     &status('No challenge reply '.$clientip);      if($ok) {
    $clientok = 1;
    &logthis('<font color="green">'
    ."Successful insecure authentication with $clientname </font>");
    print $client "ok\n";
    $keymode = "insecure";
       } else {
    &logthis('<font color="yellow">'
     ."Attempted insecure connection disallowed </font>");
    close $client;
    $clientok = 0;
   
       }
  }   }
     } else {      } else {
  &logthis("<font color=blue>WARNING: "   &logthis(
    "<font color='blue'>WARNING: "
  ."$clientip failed to initialize: >$remotereq< </font>");   ."$clientip failed to initialize: >$remotereq< </font>");
  &status('No init '.$clientip);   &status('No init '.$clientip);
     }      }
       
  } else {   } else {
     &logthis("<font color=blue>WARNING: Unknown client $clientip</font>");      &logthis(
        "<font color='blue'>WARNING: Unknown client $clientip</font>");
     &status('Hung up on '.$clientip);      &status('Hung up on '.$clientip);
  }   }
    
  if ($clientok) {   if ($clientok) {
 # ---------------- New known client connecting, could mean machine online again  # ---------------- New known client connecting, could mean machine online again
           
Line 4084  sub make_new_child { Line 4860  sub make_new_child {
  }   }
  &reconlonc("$perlvar{'lonSockDir'}/$id");   &reconlonc("$perlvar{'lonSockDir'}/$id");
     }      }
     &logthis("<font color=green>Established connection: $clientname</font>");      &logthis("<font color='green'>Established connection: $clientname</font>");
     &status('Will listen to '.$clientname);      &status('Will listen to '.$clientname);
   
     ResetStatistics();  
   
 # ------------------------------------------------------------ Process requests  # ------------------------------------------------------------ Process requests
     my $KeepGoing = 1;      my $keep_going = 1;
     while ((my $userinput=GetRequest) && $KeepGoing) {      my $user_input;
  $KeepGoing = ProcessRequest($userinput);      while(($user_input = get_request) && $keep_going) {
 # -------------------------------------------------------------------- complete   alarm(120);
    Debug("Main: Got $user_input\n");
  &status('Listening to '.$clientname);   $keep_going = &process_request($user_input);
    alarm(0);
    &status('Listening to '.$clientname." ($keymode)");   
     }      }
   
 # --------------------------------------------- client unknown or fishy, refuse  # --------------------------------------------- client unknown or fishy, refuse
  } else {   }  else {
     print $client "refused\n";      print $client "refused\n";
     $client->close();      $client->close();
     &logthis("<font color=blue>WARNING: "      &logthis("<font color='blue'>WARNING: "
      ."Rejected client $clientip, closing connection</font>");       ."Rejected client $clientip, closing connection</font>");
  }   }
     }                   }            
           
 # =============================================================================  # =============================================================================
           
     &logthis("<font color=red>CRITICAL: "      &logthis("<font color='red'>CRITICAL: "
      ."Disconnect from $clientip ($clientname)</font>");           ."Disconnect from $clientip ($clientname)</font>");    
           
           
Line 4118  sub make_new_child { Line 4894  sub make_new_child {
     exit;      exit;
           
 }  }
   #
   #   Determine if a user is an author for the indicated domain.
   #
   # Parameters:
   #    domain          - domain to check in .
   #    user            - Name of user to check.
   #
   # Return:
   #     1             - User is an author for domain.
   #     0             - User is not an author for domain.
   sub is_author {
       my ($domain, $user) = @_;
   
       &Debug("is_author: $user @ $domain");
   
       my $hashref = &tie_user_hash($domain, $user, "roles",
    &GDBM_READER());
   
       #  Author role should show up as a key /domain/_au
   
       my $key   = "/$domain/_au";
       my $value = $hashref->{$key};
   
       if(defined($value)) {
    &Debug("$user @ $domain is an author");
       }
   
       return defined($value);
   }
 #  #
 #   Checks to see if the input roleput request was to set  #   Checks to see if the input roleput request was to set
 # an author role.  If so, invokes the lchtmldir script to set  # an author role.  If so, invokes the lchtmldir script to set
Line 4131  sub make_new_child { Line 4934  sub make_new_child {
 #    user      - Name of the user for which the role is being put.  #    user      - Name of the user for which the role is being put.
 #    authtype  - The authentication type associated with the user.  #    authtype  - The authentication type associated with the user.
 #  #
 sub ManagePermissions {  sub manage_permissions
     my $request = shift;  {
     my $domain  = shift;  
     my $user    = shift;  
     my $authtype= shift;      my ($request, $domain, $user, $authtype) = @_;
   
       &Debug("manage_permissions: $request $domain $user $authtype");
   
     # See if the request is of the form /$domain/_au      # See if the request is of the form /$domain/_au
     &logthis("ruequest is $request");  
     if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...      if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
  my $execdir = $perlvar{'lonDaemons'};   my $execdir = $perlvar{'lonDaemons'};
  my $userhome= "/home/$user" ;   my $userhome= "/home/$user" ;
  &logthis("system $execdir/lchtmldir $userhome $user $authtype");   &logthis("system $execdir/lchtmldir $userhome $user $authtype");
    &Debug("Setting homedir permissions for $userhome");
  system("$execdir/lchtmldir $userhome $user $authtype");   system("$execdir/lchtmldir $userhome $user $authtype");
     }      }
 }  }
   
   
 #  #
 #  Return the full path of a user password file, whether it exists or not.  #  Return the full path of a user password file, whether it exists or not.
 # Parameters:  # Parameters:
Line 4155  sub ManagePermissions { Line 4961  sub ManagePermissions {
 # Returns:  # Returns:
 #    Full passwd path:  #    Full passwd path:
 #  #
 sub PasswordPath {  sub password_path {
     my $domain = shift;      my ($domain, $user) = @_;
     my $user   = shift;      return &propath($domain, $user).'/passwd';
   
     my $path   = &propath($domain, $user);  
     my $path  .= "/passwd";  
   
     return $path;  
 }  }
   
 #   Password Filename  #   Password Filename
Line 4175  sub PasswordPath { Line 4976  sub PasswordPath {
 #   - If the password file exists returns its path.  #   - If the password file exists returns its path.
 #   - If the password file does not exist, returns undefined.  #   - If the password file does not exist, returns undefined.
 #  #
 sub PasswordFilename {  sub password_filename {
     my $domain    = shift;      my ($domain, $user) = @_;
     my $user      = shift;  
   
     my $path  = PasswordPath($domain, $user);      Debug ("PasswordFilename called: dom = $domain user = $user");
   
       my $path  = &password_path($domain, $user);
       Debug("PasswordFilename got path: $path");
     if(-e $path) {      if(-e $path) {
  return $path;   return $path;
     } else {      } else {
Line 4198  sub PasswordFilename { Line 5000  sub PasswordFilename {
 #   0    - Failed.  #   0    - Failed.
 #   1    - Success.  #   1    - Success.
 #  #
 sub RewritePwFile {  sub rewrite_password_file {
     my $domain   = shift;      my ($domain, $user, $contents) = @_;
     my $user     = shift;  
     my $contents = shift;  
   
     my $file = PasswordFilename($domain, $user);      my $file = &password_filename($domain, $user);
     if (defined $file) {      if (defined $file) {
  my $pf = IO::File->new(">$file");   my $pf = IO::File->new(">$file");
  if($pf) {   if($pf) {
Line 4217  sub RewritePwFile { Line 5017  sub RewritePwFile {
     }      }
   
 }  }
   
 #  #
 #   GetAuthType - Determines the authorization type of a user in a domain.  #   get_auth_type - Determines the authorization type of a user in a domain.
   
 #     Returns the authorization type or nouser if there is no such user.  #     Returns the authorization type or nouser if there is no such user.
 #  #
 sub GetAuthType {  sub get_auth_type 
     my $domain = shift;  {
     my $user   = shift;  
       my ($domain, $user)  = @_;
     Debug("GetAuthType( $domain, $user ) \n");  
     my $passwdfile = PasswordFilename($domain, $user);      Debug("get_auth_type( $domain, $user ) \n");
     if( defined $passwdfile ) {      my $proname    = &propath($domain, $user); 
       my $passwdfile = "$proname/passwd";
       if( -e $passwdfile ) {
  my $pf = IO::File->new($passwdfile);   my $pf = IO::File->new($passwdfile);
  my $realpassword = <$pf>;   my $realpassword = <$pf>;
  chomp($realpassword);   chomp($realpassword);
  Debug("Password info = $realpassword\n");   Debug("Password info = $realpassword\n");
  return $realpassword;   my ($authtype, $contentpwd) = split(/:/, $realpassword);
    Debug("Authtype = $authtype, content = $contentpwd\n");
    return "$authtype:$contentpwd";     
     } else {      } else {
  Debug("Returning nouser");   Debug("Returning nouser");
  return "nouser";   return "nouser";
     }      }
 }  }
   
   #
   #  Validate a user given their domain, name and password.  This utility
   #  function is used by both  AuthenticateHandler and ChangePasswordHandler
   #  to validate the login credentials of a user.
   # Parameters:
   #    $domain    - The domain being logged into (this is required due to
   #                 the capability for multihomed systems.
   #    $user      - The name of the user being validated.
   #    $password  - The user's propoposed password.
   #
   # Returns:
   #     1        - The domain,user,pasword triplet corresponds to a valid
   #                user.
   #     0        - The domain,user,password triplet is not a valid user.
   #
   sub validate_user {
       my ($domain, $user, $password) = @_;
   
   
       # Why negative ~pi you may well ask?  Well this function is about
       # authentication, and therefore very important to get right.
       # I've initialized the flag that determines whether or not I've 
       # validated correctly to a value it's not supposed to get.
       # At the end of this function. I'll ensure that it's not still that
       # value so we don't just wind up returning some accidental value
       # as a result of executing an unforseen code path that
       # did not set $validated.  At the end of valid execution paths,
       # validated shoule be 1 for success or 0 for failuer.
   
       my $validated = -3.14159;
   
       #  How we authenticate is determined by the type of authentication
       #  the user has been assigned.  If the authentication type is
       #  "nouser", the user does not exist so we will return 0.
   
       my $contents = &get_auth_type($domain, $user);
       my ($howpwd, $contentpwd) = split(/:/, $contents);
   
       my $null = pack("C",0); # Used by kerberos auth types.
   
       if ($howpwd ne 'nouser') {
   
    if($howpwd eq "internal") { # Encrypted is in local password file.
       $validated = (crypt($password, $contentpwd) eq $contentpwd);
    }
    elsif ($howpwd eq "unix") { # User is a normal unix user.
       $contentpwd = (getpwnam($user))[1];
       if($contentpwd) {
    if($contentpwd eq 'x') { # Shadow password file...
       my $pwauth_path = "/usr/local/sbin/pwauth";
       open PWAUTH,  "|$pwauth_path" or
    die "Cannot invoke authentication";
       print PWAUTH "$user\n$password\n";
       close PWAUTH;
       $validated = ! $?;
   
    } else {         # Passwords in /etc/passwd. 
       $validated = (crypt($password,
    $contentpwd) eq $contentpwd);
    }
       } else {
    $validated = 0;
       }
    }
    elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
       if(! ($password =~ /$null/) ) {
    my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
      "",
      $contentpwd,,
      'krbtgt',
      $contentpwd,
      1,
      $password);
    if(!$k4error) {
       $validated = 1;
    } else {
       $validated = 0;
       &logthis('krb4: '.$user.', '.$contentpwd.', '.
        &Authen::Krb4::get_err_txt($Authen::Krb4::error));
    }
       } else {
    $validated = 0; # Password has a match with null.
       }
    } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
       if(!($password =~ /$null/)) { # Null password not allowed.
    my $krbclient = &Authen::Krb5::parse_name($user.'@'
     .$contentpwd);
    my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
    my $krbserver  = &Authen::Krb5::parse_name($krbservice);
    my $credentials= &Authen::Krb5::cc_default();
    $credentials->initialize($krbclient);
    my $krbreturn  = &Authen::Krb5::get_in_tkt_with_password($krbclient,
    $krbserver,
    $password,
    $credentials);
    $validated = ($krbreturn == 1);
       } else {
    $validated = 0;
       }
    } elsif ($howpwd eq "localauth") { 
       #  Authenticate via installation specific authentcation method:
       $validated = &localauth::localauth($user, 
          $password, 
          $contentpwd);
    } else { # Unrecognized auth is also bad.
       $validated = 0;
    }
       } else {
    $validated = 0;
       }
       #
       #  $validated has the correct stat of the authentication:
       #
   
       unless ($validated != -3.14159) {
    #  I >really really< want to know if this happens.
    #  since it indicates that user authentication is badly
    #  broken in some code path.
           #
    die "ValidateUser - failed to set the value of validated $domain, $user $password";
       }
       return $validated;
   }
   
   
 sub addline {  sub addline {
     my ($fname,$hostid,$ip,$newline)=@_;      my ($fname,$hostid,$ip,$newline)=@_;
     my $contents;      my $contents;
Line 4260  sub addline { Line 5190  sub addline {
     return $found;      return $found;
 }  }
   
 sub getchat {  sub get_chat {
     my ($cdom,$cname,$udom,$uname)=@_;      my ($cdom,$cname,$udom,$uname)=@_;
     my %hash;      my %hash;
     my $proname=&propath($cdom,$cname);      my $proname=&propath($cdom,$cname);
Line 4285  sub getchat { Line 5215  sub getchat {
     return (@participants,@entries);      return (@participants,@entries);
 }  }
   
 sub chatadd {  sub chat_add {
     my ($cdom,$cname,$newchat)=@_;      my ($cdom,$cname,$newchat)=@_;
     my %hash;      my %hash;
     my $proname=&propath($cdom,$cname);      my $proname=&propath($cdom,$cname);
Line 4324  sub chatadd { Line 5254  sub chatadd {
 sub unsub {  sub unsub {
     my ($fname,$clientip)=@_;      my ($fname,$clientip)=@_;
     my $result;      my $result;
       my $unsubs = 0; # Number of successful unsubscribes:
   
   
       # An old way subscriptions were handled was to have a 
       # subscription marker file:
   
       Debug("Attempting unlink of $fname.$clientname");
     if (unlink("$fname.$clientname")) {      if (unlink("$fname.$clientname")) {
  $result="ok\n";   $unsubs++; # Successful unsub via marker file.
     } else {      } 
  $result="not_subscribed\n";  
     }      # The more modern way to do it is to have a subscription list
       # file:
   
     if (-e "$fname.subscription") {      if (-e "$fname.subscription") {
  my $found=&addline($fname,$clientname,$clientip,'');   my $found=&addline($fname,$clientname,$clientip,'');
  if ($found) { $result="ok\n"; }   if ($found) { 
       $unsubs++;
    }
       } 
   
       #  If either or both of these mechanisms succeeded in unsubscribing a 
       #  resource we can return ok:
   
       if($unsubs) {
    $result = "ok\n";
     } else {      } else {
  if ($result != "ok\n") { $result="not_subscribed\n"; }   $result = "not_subscribed\n";
     }      }
   
     return $result;      return $result;
 }  }
   
Line 4343  sub currentversion { Line 5292  sub currentversion {
     my $version=-1;      my $version=-1;
     my $ulsdir='';      my $ulsdir='';
     if ($fname=~/^(.+)\/[^\/]+$/) {      if ($fname=~/^(.+)\/[^\/]+$/) {
  $ulsdir=$1;         $ulsdir=$1;
     }      }
     my ($fnamere1,$fnamere2);      my ($fnamere1,$fnamere2);
     # remove version if already specified      # remove version if already specified
Line 4400  sub subscribe { Line 5349  sub subscribe {
                     symlink($root.'.'.$extension,                      symlink($root.'.'.$extension,
                             $root.'.'.$currentversion.'.'.$extension);                              $root.'.'.$currentversion.'.'.$extension);
                     unless ($extension=~/\.meta$/) {                      unless ($extension=~/\.meta$/) {
  symlink($root.'.'.$extension.'.meta',                         symlink($root.'.'.$extension.'.meta',
  $root.'.'.$currentversion.'.'.$extension.'.meta');                              $root.'.'.$currentversion.'.'.$extension.'.meta');
     }      }
                 }                  }
             }              }
Line 4438  sub make_passwd_file { Line 5387  sub make_passwd_file {
     if ($umode eq 'krb4' or $umode eq 'krb5') {      if ($umode eq 'krb4' or $umode eq 'krb5') {
  {   {
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new(">$passfilename");
     print $pf "$umode:$npass\n";      if ($pf) {
    print $pf "$umode:$npass\n";
       } else {
    $result = "pass_file_failed_error";
       }
  }   }
     } elsif ($umode eq 'internal') {      } elsif ($umode eq 'internal') {
  my $salt=time;   my $salt=time;
Line 4447  sub make_passwd_file { Line 5400  sub make_passwd_file {
  {   {
     &Debug("Creating internal auth");      &Debug("Creating internal auth");
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new(">$passfilename");
     print $pf "internal:$ncpass\n";       if($pf) {
    print $pf "internal:$ncpass\n"; 
       } else {
    $result = "pass_file_failed_error";
       }
  }   }
     } elsif ($umode eq 'localauth') {      } elsif ($umode eq 'localauth') {
  {   {
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new(">$passfilename");
     print $pf "localauth:$npass\n";      if($pf) {
    print $pf "localauth:$npass\n";
       } else {
    $result = "pass_file_failed_error";
       }
  }   }
     } elsif ($umode eq 'unix') {      } elsif ($umode eq 'unix') {
  {   {
     my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";      #
       #  Don't allow the creation of privileged accounts!!! that would
       #  be real bad!!!
       #
       my $uid = getpwnam($uname);
       if((defined $uid) && ($uid == 0)) {
    &logthis(">>>Attempted to create privilged account blocked");
    return "no_priv_account_error\n";
       }
   
       my $execpath       ="$perlvar{'lonDaemons'}/"."lcuseradd";
   
       my $lc_error_file  = $execdir."/tmp/lcuseradd".$$.".status";
     {      {
  &Debug("Executing external: ".$execpath);   &Debug("Executing external: ".$execpath);
  &Debug("user  = ".$uname.", Password =". $npass);   &Debug("user  = ".$uname.", Password =". $npass);
Line 4464  sub make_passwd_file { Line 5437  sub make_passwd_file {
  print $se "$uname\n";   print $se "$uname\n";
  print $se "$npass\n";   print $se "$npass\n";
  print $se "$npass\n";   print $se "$npass\n";
    print $se "$lc_error_file\n"; # Status -> unique file.
     }      }
     my $useraddok = $?;      my $error = IO::File->new("< $lc_error_file");
       my $useraddok = <$error>;
       $error->close;
       unlink($lc_error_file);
   
       chomp $useraddok;
   
     if($useraddok > 0) {      if($useraddok > 0) {
  &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));   my $error_text = &lcuseraddstrerror($useraddok);
    &logthis("Failed lcuseradd: $error_text");
    $result = "lcuseradd_failed:$error_text\n";
       }  else {
    my $pf = IO::File->new(">$passfilename");
    if($pf) {
       print $pf "unix:\n";
    } else {
       $result = "pass_file_failed_error";
    }
     }      }
     my $pf = IO::File->new(">$passfilename");  
     print $pf "unix:\n";  
  }   }
     } elsif ($umode eq 'none') {      } elsif ($umode eq 'none') {
  {   {
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new("> $passfilename");
     print $pf "none:\n";      if($pf) {
    print $pf "none:\n";
       } else {
    $result = "pass_file_failed_error";
       }
  }   }
     } else {      } else {
  $result="auth_mode_error\n";   $result="auth_mode_error\n";
Line 4483  sub make_passwd_file { Line 5474  sub make_passwd_file {
     return $result;      return $result;
 }  }
   
   sub convert_photo {
       my ($start,$dest)=@_;
       system("convert $start $dest");
   }
   
 sub sethost {  sub sethost {
     my ($remotereq) = @_;      my ($remotereq) = @_;
     my (undef,$hostid)=split(/:/,$remotereq);      my (undef,$hostid)=split(/:/,$remotereq);
     if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }      if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
     if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {      if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
  $currenthostid=$hostid;   $currenthostid  =$hostid;
  $currentdomainid=$hostdom{$hostid};   $currentdomainid=$hostdom{$hostid};
  &logthis("Setting hostid to $hostid, and domain to $currentdomainid");   &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
     } else {      } else {
Line 4504  sub version { Line 5500  sub version {
     $remoteVERSION=(split(/:/,$userinput))[1];      $remoteVERSION=(split(/:/,$userinput))[1];
     return "version:$VERSION";      return "version:$VERSION";
 }  }
 ############## >>>>>>>>>>>>>>>>>>>>>>>>>> FUTUREWORK <<<<<<<<<<<<<<<<<<<<<<<<<<<<  
 #There is a copy of this in lonnet.pm  #There is a copy of this in lonnet.pm
 #   Can we hoist these lil' things out into common places?  
 #  
 sub userload {  sub userload {
     my $numusers=0;      my $numusers=0;
     {      {
Line 4530  sub userload { Line 5524  sub userload {
     return $userloadpercent;      return $userloadpercent;
 }  }
   
   # Routines for serializing arrays and hashes (copies from lonnet)
   
   sub array2str {
     my (@array) = @_;
     my $result=&arrayref2str(\@array);
     $result=~s/^__ARRAY_REF__//;
     $result=~s/__END_ARRAY_REF__$//;
     return $result;
   }
                                                                                    
   sub arrayref2str {
     my ($arrayref) = @_;
     my $result='__ARRAY_REF__';
     foreach my $elem (@$arrayref) {
       if(ref($elem) eq 'ARRAY') {
         $result.=&arrayref2str($elem).'&';
       } elsif(ref($elem) eq 'HASH') {
         $result.=&hashref2str($elem).'&';
       } elsif(ref($elem)) {
         #print("Got a ref of ".(ref($elem))." skipping.");
       } else {
         $result.=&escape($elem).'&';
       }
     }
     $result=~s/\&$//;
     $result .= '__END_ARRAY_REF__';
     return $result;
   }
                                                                                    
   sub hash2str {
     my (%hash) = @_;
     my $result=&hashref2str(\%hash);
     $result=~s/^__HASH_REF__//;
     $result=~s/__END_HASH_REF__$//;
     return $result;
   }
                                                                                    
   sub hashref2str {
     my ($hashref)=@_;
     my $result='__HASH_REF__';
     foreach (sort(keys(%$hashref))) {
       if (ref($_) eq 'ARRAY') {
         $result.=&arrayref2str($_).'=';
       } elsif (ref($_) eq 'HASH') {
         $result.=&hashref2str($_).'=';
       } elsif (ref($_)) {
         $result.='=';
         #print("Got a ref of ".(ref($_))." skipping.");
       } else {
           if ($_) {$result.=&escape($_).'=';} else { last; }
       }
   
       if(ref($hashref->{$_}) eq 'ARRAY') {
         $result.=&arrayref2str($hashref->{$_}).'&';
       } elsif(ref($hashref->{$_}) eq 'HASH') {
         $result.=&hashref2str($hashref->{$_}).'&';
       } elsif(ref($hashref->{$_})) {
          $result.='&';
         #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
       } else {
         $result.=&escape($hashref->{$_}).'&';
       }
     }
     $result=~s/\&$//;
     $result .= '__END_HASH_REF__';
     return $result;
   }
   
 # ----------------------------------- POD (plain old documentation, CPAN style)  # ----------------------------------- POD (plain old documentation, CPAN style)
   
 =head1 NAME  =head1 NAME
Line 4737  Place in B<logs/lond.log> Line 5799  Place in B<logs/lond.log>
   
 stores hash in namespace  stores hash in namespace
   
 =item rolesput  =item rolesputy
   
 put a role into a user's environment  put a role into a user's environment
   
Removed from v.1.178.2.9  
changed lines
  Added in v.1.276

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>