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Diff for /loncom/lond between versions 1.282 and 1.386

version 1.282, 2005/04/12 00:19:59 version 1.386, 2007/10/08 21:05:49
Line 31 Line 31
   
 use strict;  use strict;
 use lib '/home/httpd/lib/perl/';  use lib '/home/httpd/lib/perl/';
   use LONCAPA;
 use LONCAPA::Configuration;  use LONCAPA::Configuration;
   
 use IO::Socket;  use IO::Socket;
 use IO::File;  use IO::File;
 #use Apache::File;  #use Apache::File;
 use Symbol;  
 use POSIX;  use POSIX;
 use Crypt::IDEA;  use Crypt::IDEA;
 use LWP::UserAgent();  use LWP::UserAgent();
   use Digest::MD5 qw(md5_hex);
 use GDBM_File;  use GDBM_File;
 use Authen::Krb4;  use Authen::Krb4;
 use Authen::Krb5;  use Authen::Krb5;
 use lib '/home/httpd/lib/perl/';  
 use localauth;  use localauth;
 use localenroll;  use localenroll;
 use localstudentphoto;  use localstudentphoto;
 use File::Copy;  use File::Copy;
 use LONCAPA::ConfigFileEdit;  use File::Find;
 use LONCAPA::lonlocal;  use LONCAPA::lonlocal;
 use LONCAPA::lonssl;  use LONCAPA::lonssl;
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
   use Apache::lonnet;
   
 my $DEBUG = 0;       # Non zero to enable debug log entries.  my $DEBUG = 0;       # Non zero to enable debug log entries.
   
Line 68  my $clientip;   # IP address of client. Line 69  my $clientip;   # IP address of client.
 my $clientname; # LonCAPA name of client.  my $clientname; # LonCAPA name of client.
   
 my $server;  my $server;
 my $thisserver; # DNS of us.  
   
 my $keymode;  my $keymode;
   
Line 84  my $tmpsnum = 0;  # Id of tmpputs. Line 84  my $tmpsnum = 0;  # Id of tmpputs.
   
 my $ConnectionType;  my $ConnectionType;
   
 my %hostid; # ID's for hosts in cluster by ip.  
 my %hostdom; # LonCAPA domain for hosts in cluster.  
 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
   
 my %perlvar; # Will have the apache conf defined perl vars.  my %perlvar; # Will have the apache conf defined perl vars.
Line 112  my %Dispatcher; Line 107  my %Dispatcher;
 #  #
 my $lastpwderror    = 13; # Largest error number from lcpasswd.  my $lastpwderror    = 13; # Largest error number from lcpasswd.
 my @passwderrors = ("ok",  my @passwderrors = ("ok",
    "lcpasswd must be run as user 'www'",     "pwchange_failure - lcpasswd must be run as user 'www'",
    "lcpasswd got incorrect number of arguments",     "pwchange_failure - lcpasswd got incorrect number of arguments",
    "lcpasswd did not get the right nubmer of input text lines",     "pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
    "lcpasswd too many simultaneous pwd changes in progress",     "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
    "lcpasswd User does not exist.",     "pwchange_failure - lcpasswd User does not exist.",
    "lcpasswd Incorrect current passwd",     "pwchange_failure - lcpasswd Incorrect current passwd",
    "lcpasswd Unable to su to root.",     "pwchange_failure - lcpasswd Unable to su to root.",
    "lcpasswd Cannot set new passwd.",     "pwchange_failure - lcpasswd Cannot set new passwd.",
    "lcpasswd Username has invalid characters",     "pwchange_failure - lcpasswd Username has invalid characters",
    "lcpasswd Invalid characters in password",     "pwchange_failure - lcpasswd Invalid characters in password",
    "lcpasswd User already exists",      "pwchange_failure - lcpasswd User already exists", 
                    "lcpasswd Something went wrong with user addition.",                     "pwchange_failure - lcpasswd Something went wrong with user addition.",
     "lcpasswd Password mismatch",     "pwchange_failure - lcpasswd Password mismatch",
     "lcpasswd Error filename is invalid");     "pwchange_failure - lcpasswd Error filename is invalid");
   
   
 #  The array below are lcuseradd error strings.:  #  The array below are lcuseradd error strings.:
Line 140  my @adderrors    = ("ok", Line 135  my @adderrors    = ("ok",
     "lcuseradd Unable to make www member of users's group",      "lcuseradd Unable to make www member of users's group",
     "lcuseradd Unable to su to root",      "lcuseradd Unable to su to root",
     "lcuseradd Unable to set password",      "lcuseradd Unable to set password",
     "lcuseradd Usrname has invalid characters",      "lcuseradd Username has invalid characters",
     "lcuseradd Password has an invalid character",      "lcuseradd Password has an invalid character",
     "lcuseradd User already exists",      "lcuseradd User already exists",
     "lcuseradd Could not add user.",      "lcuseradd Could not add user.",
Line 176  sub ResetStatistics { Line 171  sub ResetStatistics {
 #   $Socket      - Socket open on client.  #   $Socket      - Socket open on client.
 #   $initcmd     - The full text of the init command.  #   $initcmd     - The full text of the init command.
 #  #
 # Implicit inputs:  
 #    $thisserver - Our DNS name.  
 #  
 # Returns:  # Returns:
 #     IDEA session key on success.  #     IDEA session key on success.
 #     undef on failure.  #     undef on failure.
 #  #
 sub LocalConnection {  sub LocalConnection {
     my ($Socket, $initcmd) = @_;      my ($Socket, $initcmd) = @_;
     Debug("Attempting local connection: $initcmd client: $clientip me: $thisserver");      Debug("Attempting local connection: $initcmd client: $clientip");
     if($clientip ne "127.0.0.1") {      if($clientip ne "127.0.0.1") {
  &logthis('<font color="red"> LocalConnection rejecting non local: '   &logthis('<font color="red"> LocalConnection rejecting non local: '
  ."$clientip ne $thisserver </font>");   ."$clientip ne 127.0.0.1 </font>");
  close $Socket;   close $Socket;
  return undef;   return undef;
     }  else {      }  else {
Line 422  sub ReadManagerTable { Line 414  sub ReadManagerTable {
       if ($host =~ "^#") {                  # Comment line.        if ($host =~ "^#") {                  # Comment line.
          next;           next;
       }        }
       if (!defined $hostip{$host}) { # This is a non cluster member        if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member
     #  The entry is of the form:      #  The entry is of the form:
     #    cluname:hostname      #    cluname:hostname
     #  cluname - A 'cluster hostname' is needed in order to negotiate      #  cluname - A 'cluster hostname' is needed in order to negotiate
Line 440  sub ReadManagerTable { Line 432  sub ReadManagerTable {
          }           }
       } else {        } else {
          logthis('<font color="green"> existing host'." $host</font>\n");           logthis('<font color="green"> existing host'." $host</font>\n");
          $managers{$hostip{$host}} = $host;  # Use info from cluster tab if clumemeber           $managers{&Apache::lonnet::get_host_ip($host)} = $host;  # Use info from cluster tab if clumemeber
       }        }
    }     }
 }  }
Line 501  sub AdjustHostContents { Line 493  sub AdjustHostContents {
     my $adjusted;      my $adjusted;
     my $me        = $perlvar{'lonHostID'};      my $me        = $perlvar{'lonHostID'};
   
  foreach my $line (split(/\n/,$contents)) {      foreach my $line (split(/\n/,$contents)) {
  if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {   if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
     chomp($line);      chomp($line);
     my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);      my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
     if ($id eq $me) {      if ($id eq $me) {
           my $ip = gethostbyname($name);   my $ip = gethostbyname($name);
           my $ipnew = inet_ntoa($ip);   my $ipnew = inet_ntoa($ip);
          $ip = $ipnew;   $ip = $ipnew;
  #  Reconstruct the host line and append to adjusted:   #  Reconstruct the host line and append to adjusted:
   
    my $newline = "$id:$domain:$role:$name:$ip";   my $newline = "$id:$domain:$role:$name:$ip";
    if($maxcon ne "") { # Not all hosts have loncnew tuning params   if($maxcon ne "") { # Not all hosts have loncnew tuning params
      $newline .= ":$maxcon:$idleto:$mincon";      $newline .= ":$maxcon:$idleto:$mincon";
    }   }
    $adjusted .= $newline."\n";   $adjusted .= $newline."\n";
   
       } else { # Not me, pass unmodified.      } else { # Not me, pass unmodified.
    $adjusted .= $line."\n";   $adjusted .= $line."\n";
       }      }
  } else {                  # Blank or comment never re-written.   } else {                  # Blank or comment never re-written.
     $adjusted .= $line."\n"; # Pass blanks and comments as is.      $adjusted .= $line."\n"; # Pass blanks and comments as is.
  }   }
  }      }
  return $adjusted;      return $adjusted;
 }  }
 #  #
 #   InstallFile: Called to install an administrative file:  #   InstallFile: Called to install an administrative file:
Line 833  sub AdjustOurHost { Line 825  sub AdjustOurHost {
     #   Use the config line to get my hostname.      #   Use the config line to get my hostname.
     #   Use gethostbyname to translate that into an IP address.      #   Use gethostbyname to translate that into an IP address.
     #      #
     my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);      my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
     my $BinaryIp = gethostbyname($name);  
     my $ip       = inet_ntoa($ip);  
     #      #
     #  Reassemble the config line from the elements in the list.      #  Reassemble the config line from the elements in the list.
     #  Note that if the loncnew items were not present before, they will      #  Note that if the loncnew items were not present before, they will
     #  be now even if they would be empty      #  be now even if they would be empty
     #      #
     my $newConfigLine = $id;      my $newConfigLine = $id;
     foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {      foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) {
  $newConfigLine .= ":".$item;   $newConfigLine .= ":".$item;
     }      }
     #  Replace the line:      #  Replace the line:
Line 888  sub EditFile { Line 878  sub EditFile {
   
     #  Split the command into it's pieces:  edit:filetype:script      #  Split the command into it's pieces:  edit:filetype:script
   
     my ($request, $filetype, $script) = split(/:/, $request,3); # : in script      my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script
   
     #  Check the pre-coditions for success:      #  Check the pre-coditions for success:
   
     if($request != "edit") { # Something is amiss afoot alack.      if($cmd != "edit") { # Something is amiss afoot alack.
  return "error:edit request detected, but request != 'edit'\n";   return "error:edit request detected, but request != 'edit'\n";
     }      }
     if( ($filetype ne "hosts")  &&      if( ($filetype ne "hosts")  &&
Line 937  sub EditFile { Line 927  sub EditFile {
     return "ok\n";      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.  
 #  If requested a history entry is created in the associated hist file.  
 #  
 #  Parameters:  
 #     domain    - Name of the domain in which the resource file lives.  
 #     namespace - Name of the hash within that domain.  
 #     how       - How to tie the hash (e.g. GDBM_WRCREAT()).  
 #     loghead   - Optional parameter, if present a log entry is created  
 #                 in the associated history file and this is the first part  
 #                  of that entry.  
 #     logtail   - Goes along with loghead,  The actual logentry is of the  
 #                 form $loghead:<timestamp>:logtail.  
 # Returns:  
 #    Reference to a hash bound to the db file or alternatively undef  
 #    if the tie failed.  
 #  
 sub tie_domain_hash {  
     my ($domain,$namespace,$how,$loghead,$logtail) = @_;  
       
     # Filter out any whitespace in the domain name:  
       
     $domain =~ s/\W//g;  
       
     # We have enough to go on to tie the hash:  
       
     my $user_top_dir   = $perlvar{'lonUsersDir'};  
     my $domain_dir     = $user_top_dir."/$domain";  
     my $resource_file  = $domain_dir."/$namespace.db";  
     my %hash;  
     if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {  
  if (defined($loghead)) { # Need to log the operation.  
     my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");  
     if($logFh) {  
  my $timestamp = time;  
  print $logFh "$loghead:$timestamp:$logtail\n";  
     }  
     $logFh->close;  
  }  
  return \%hash; # Return the tied hash.  
     } else {  
  return undef; # Tie failed.  
     }  
 }  
   
 #  
 #   Ties a user's resource file to a hash.    
 #   If necessary, an appropriate history  
 #   log file entry is made as well.  
 #   This sub factors out common code from the subs that manipulate  
 #   the various gdbm files that keep keyword value pairs.  
 # Parameters:  
 #   domain       - Name of the domain the user is in.  
 #   user         - Name of the 'current user'.  
 #   namespace    - Namespace representing the file to tie.  
 #   how          - What the tie is done to (e.g. GDBM_WRCREAT().  
 #   loghead      - Optional first part of log entry if there may be a  
 #                  history file.  
 #   what         - Optional tail of log entry if there may be a history  
 #                  file.  
 # Returns:  
 #   hash to which the database is tied.  It's up to the caller to untie.  
 #   undef if the has could not be tied.  
 #  
 sub tie_user_hash {  
     my ($domain,$user,$namespace,$how,$loghead,$what) = @_;  
   
     $namespace=~s/\//\_/g; # / -> _  
     $namespace=~s/\W//g; # whitespace eliminated.  
     my $proname     = propath($domain, $user);  
      
     #  Tie the database.  
       
     my %hash;  
     if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",  
    $how, 0640)) {  
  # If this is a namespace for which a history is kept,  
  # make the history log entry:      
  if (($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 \%hash;  
     } else {  
  return undef;  
     }  
       
 }  
   
 #   read_profile  #   read_profile
 #  #
 #   Returns a set of specific entries from a user's profile file.  #   Returns a set of specific entries from a user's profile file.
Line 1066  sub read_profile { Line 957  sub read_profile {
     $qresult.="$hashref->{$queries[$i]}&";    # Presumably failure gives empty string.      $qresult.="$hashref->{$queries[$i]}&";    # Presumably failure gives empty string.
  }   }
  $qresult=~s/\&$//;              # Remove trailing & from last lookup.   $qresult=~s/\&$//;              # Remove trailing & from last lookup.
  if (untie %$hashref) {   if (&untie_user_hash($hashref)) {
     return $qresult;      return $qresult;
  } else {   } else {
     return "error: ".($!+0)." untie (GDBM) Failed";      return "error: ".($!+0)." untie (GDBM) Failed";
Line 1131  sub ping_handler { Line 1022  sub ping_handler {
 sub pong_handler {  sub pong_handler {
     my ($cmd, $tail, $replyfd) = @_;      my ($cmd, $tail, $replyfd) = @_;
   
     my $reply=&reply("ping",$clientname);      my $reply=&Apache::lonnet::reply("ping",$clientname);
     &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail");       &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail"); 
     return 1;      return 1;
 }  }
Line 1241  sub load_handler { Line 1132  sub load_handler {
 sub user_load_handler {  sub user_load_handler {
     my ($cmd, $tail, $replyfd) = @_;      my ($cmd, $tail, $replyfd) = @_;
   
     my $userloadpercent=&userload();      my $userloadpercent=&Apache::lonnet::userload();
     &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");      &Reply($replyfd, "$userloadpercent\n", "$cmd:$tail");
           
     return 1;      return 1;
Line 1349  sub push_file_handler { Line 1240  sub push_file_handler {
 #  #
 sub du_handler {  sub du_handler {
     my ($cmd, $ududir, $client) = @_;      my ($cmd, $ududir, $client) = @_;
     my ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.      ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
     my $userinput = "$cmd:$ududir";      my $userinput = "$cmd:$ududir";
   
     if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {      if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) {
Line 1363  sub du_handler { Line 1254  sub du_handler {
     #  etc.      #  etc.
     #      #
     if (-d $ududir) {      if (-d $ududir) {
  #  And as Shakespeare would say to make   my $total_size=0;
  #  assurance double sure,    my $code=sub { 
  # use execute_command to ensure that the command is not executed in      if ($_=~/\.\d+\./) { return;} 
  # a shell that can screw us up.      if ($_=~/\.meta$/) { return;}
       if (-d $_)         { return;}
  my $duout = execute_command("du -ks $ududir");      $total_size+=(stat($_))[7];
  $duout=~s/[^\d]//g; #preserve only the numbers   };
  &Reply($client,"$duout\n","$cmd:$ududir");   chdir($ududir);
    find($code,$ududir);
    $total_size=int($total_size/1024);
    &Reply($client,"$total_size\n","$cmd:$ududir");
     } else {      } else {
   
  &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");    &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir"); 
   
     }      }
     return 1;      return 1;
 }  }
Line 1413  sub ls_handler { Line 1305  sub ls_handler {
  if(-d $ulsdir) {   if(-d $ulsdir) {
     if (opendir(LSDIR,$ulsdir)) {      if (opendir(LSDIR,$ulsdir)) {
  while ($ulsfn=readdir(LSDIR)) {   while ($ulsfn=readdir(LSDIR)) {
     undef $obs, $rights;       undef($obs);
       undef($rights); 
     my @ulsstats=stat($ulsdir.'/'.$ulsfn);      my @ulsstats=stat($ulsdir.'/'.$ulsfn);
     #We do some obsolete checking here      #We do some obsolete checking here
     if(-e $ulsdir.'/'.$ulsfn.".meta") {       if(-e $ulsdir.'/'.$ulsfn.".meta") { 
  open(FILE, $ulsdir.'/'.$ulsfn.".meta");   open(FILE, $ulsdir.'/'.$ulsfn.".meta");
  my @obsolete=<FILE>;   my @obsolete=<FILE>;
  foreach my $obsolete (@obsolete) {   foreach my $obsolete (@obsolete) {
     if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }       if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 
     if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }      if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
  }   }
     }      }
Line 1480  sub ls2_handler { Line 1373  sub ls2_handler {
         if(-d $ulsdir) {          if(-d $ulsdir) {
             if (opendir(LSDIR,$ulsdir)) {              if (opendir(LSDIR,$ulsdir)) {
                 while ($ulsfn=readdir(LSDIR)) {                  while ($ulsfn=readdir(LSDIR)) {
                     undef $obs, $rights;                       undef($obs);
       undef($rights); 
                     my @ulsstats=stat($ulsdir.'/'.$ulsfn);                      my @ulsstats=stat($ulsdir.'/'.$ulsfn);
                     #We do some obsolete checking here                      #We do some obsolete checking here
                     if(-e $ulsdir.'/'.$ulsfn.".meta") {                       if(-e $ulsdir.'/'.$ulsfn.".meta") { 
                         open(FILE, $ulsdir.'/'.$ulsfn.".meta");                          open(FILE, $ulsdir.'/'.$ulsfn.".meta");
                         my @obsolete=<FILE>;                          my @obsolete=<FILE>;
                         foreach my $obsolete (@obsolete) {                          foreach my $obsolete (@obsolete) {
                             if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }                               if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 
                             if($obsolete =~ m|(<copyright>)(default)|) {                              if($obsolete =~ m|(<copyright>)(default)|) {
                                 $rights = 1;                                  $rights = 1;
                             }                              }
Line 1671  sub change_password_handler { Line 1565  sub change_password_handler {
     #  uname - Username.      #  uname - Username.
     #  upass - Current password.      #  upass - Current password.
     #  npass - New password.      #  npass - New password.
       #  context - Context in which this was called 
       #            (preferences or reset_by_email).
         
     my ($udom,$uname,$upass,$npass)=split(/:/,$tail);      my ($udom,$uname,$upass,$npass,$context)=split(/:/,$tail);
   
     $upass=&unescape($upass);      $upass=&unescape($upass);
     $npass=&unescape($npass);      $npass=&unescape($npass);
     &Debug("Trying to change password for $uname");      &Debug("Trying to change password for $uname");
   
     # First require that the user can be authenticated with their      # First require that the user can be authenticated with their
     # old password:      # old password unless context was 'reset_by_email':
       
     my $validated = &validate_user($udom, $uname, $upass);      my $validated;
       if ($context eq 'reset_by_email') {
           $validated = 1;
       } else {
           $validated = &validate_user($udom, $uname, $upass);
       }
     if($validated) {      if($validated) {
  my $realpasswd  = &get_auth_type($udom, $uname); # Defined since authd.   my $realpasswd  = &get_auth_type($udom, $uname); # Defined since authd.
   
Line 1700  sub change_password_handler { Line 1601  sub change_password_handler {
  ."to change password");   ."to change password");
  &Failure( $client, "non_authorized\n",$userinput);   &Failure( $client, "non_authorized\n",$userinput);
     }      }
  } elsif ($howpwd eq 'unix') {   } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
     # Unix means we have to access /etc/password      my $result = &change_unix_password($uname, $npass);
     &Debug("auth is unix");  
     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: ".      &logthis("Result of password change for $uname: ".
      &lcpasswdstrerror($?));       $result);
     &Reply($client, "$result\n", $userinput);      &Reply($client, "$result\n", $userinput);
  } else {   } else {
     # this just means that the current password mode is not      # this just means that the current password mode is not
Line 1812  sub add_user_handler { Line 1703  sub add_user_handler {
 # 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.
   # NOTE:
   #   This is also used to change the authentication credential values (e.g. passwd).
   #   
 #  #
 sub change_authentication_handler {  sub change_authentication_handler {
   
Line 1831  sub change_authentication_handler { Line 1725  sub change_authentication_handler {
  my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.   my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
  my $passfilename = &password_path($udom, $uname);   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,$passfilename);      # If just changing the unix passwd. need to arrange to run
     #      # passwd since otherwise make_passwd_file will run
     #  If the current auth mode is internal, and the old auth mode was      # lcuseradd which fails if an account already exists
     #  unix, or krb*,  and the user is an author for this domain,      # (to prevent an unscrupulous LONCAPA admin from stealing
     #  re-run manage_permissions for that role in order to be able      # an existing account by overwriting it as a LonCAPA account).
     #  to take ownership of the construction space back to www:www  
     #      if(($oldauth =~/^unix/) && ($umode eq "unix")) {
    my $result = &change_unix_password($uname, $npass);
     if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||   &logthis("Result of password change for $uname: ".$result);
  (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {    if ($result eq "ok") {
  if(&is_author($udom, $uname)) {      &Reply($client, "$result\n")
     &Debug(" Need to manage author permissions...");   } else {
     &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");      &Failure($client, "$result\n");
    }
       } else {
    my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
    #
    #  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);
     }      }
                 
   
     &Reply($client, $result, $userinput);  
  } else {          } else {       
     &Failure($client, "non_authorized\n", $userinput); # Fail the user now.      &Failure($client, "non_authorized\n", $userinput); # Fail the user now.
  }   }
Line 1929  sub update_resource_handler { Line 1840  sub update_resource_handler {
     my $now=time;      my $now=time;
     my $since=$now-$atime;      my $since=$now-$atime;
     if ($since>$perlvar{'lonExpire'}) {      if ($since>$perlvar{'lonExpire'}) {
  my $reply=&reply("unsub:$fname","$clientname");   my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
    &devalidate_meta_cache($fname);
  unlink("$fname");   unlink("$fname");
    unlink("$fname.meta");
     } else {      } else {
  my $transname="$fname.in.transfer";   my $transname="$fname.in.transfer";
  my $remoteurl=&reply("sub:$fname","$clientname");   my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
  my $response;   my $response;
  alarm(120);   alarm(120);
  {   {
Line 1960  sub update_resource_handler { Line 1873  sub update_resource_handler {
  alarm(0);   alarm(0);
     }      }
     rename($transname,$fname);      rename($transname,$fname);
       &devalidate_meta_cache($fname);
  }   }
     }      }
     &Reply( $client, "ok\n", $userinput);      &Reply( $client, "ok\n", $userinput);
Line 1973  sub update_resource_handler { Line 1887  sub update_resource_handler {
 }  }
 &register_handler("update", \&update_resource_handler, 0 ,1, 0);  &register_handler("update", \&update_resource_handler, 0 ,1, 0);
   
   sub devalidate_meta_cache {
       my ($url) = @_;
       use Cache::Memcached;
       my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
       $url = &Apache::lonnet::declutter($url);
       $url =~ s-\.meta$--;
       my $id = &escape('meta:'.$url);
       $memcache->delete($id);
   }
   
 #  #
 #   Fetch a user file from a remote server to the user's home directory  #   Fetch a user file from a remote server to the user's home directory
 #   userfiles subdir.  #   userfiles subdir.
Line 2171  sub rename_user_file_handler { Line 2095  sub rename_user_file_handler {
 &register_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);  &register_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
   
 #  #
   #  Checks if the specified user has an active session on the server
   #  return ok if so, not_found if not
   #
   # 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 user_has_session_handler {
       my ($cmd, $tail, $client) = @_;
   
       my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
       
       &logthis("Looking for $udom $uname");
       opendir(DIR,$perlvar{'lonIDsDir'});
       my $filename;
       while ($filename=readdir(DIR)) {
    last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/);
       }
       if ($filename) {
    &Reply($client, "ok\n", "$cmd:$tail");
       } else {
    &Failure($client, "not_found\n", "$cmd:$tail");
       }
       return 1;
   
   }
   &register_handler("userhassession", \&user_has_session_handler, 0,1,0);
   
   #
 #  Authenticate access to a user file by checking that the token the user's   #  Authenticate access to a user file by checking that the token the user's 
 #  passed also exists in their session file  #  passed also exists in their session file
 #  #
Line 2187  sub token_auth_user_file_handler { Line 2142  sub token_auth_user_file_handler {
           
     chomp($session);      chomp($session);
     my $reply="non_auth\n";      my $reply="non_auth\n";
     if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.      my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id';
      $session.'.id')) {      if (open(ENVIN,"$file")) {
  while (my $line=<ENVIN>) {   flock(ENVIN,LOCK_SH);
     if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply="ok\n"; }   tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640);
    if (exists($disk_env{"userfile.$fname"})) {
       $reply="ok\n";
    } else {
       foreach my $envname (keys(%disk_env)) {
    if ($envname=~ m|^userfile\.\Q$fname\E|) {
       $reply="ok\n";
       last;
    }
       }
  }   }
    untie(%disk_env);
  close(ENVIN);   close(ENVIN);
  &Reply($client, $reply, "$cmd:$tail");   &Reply($client, $reply, "$cmd:$tail");
     } else {      } else {
Line 2253  sub subscribe_handler { Line 2218  sub subscribe_handler {
 &register_handler("sub", \&subscribe_handler, 0, 1, 0);  &register_handler("sub", \&subscribe_handler, 0, 1, 0);
   
 #  #
 #   Determine the version of a resource (?) Or is it return  #   Determine the latest version of a resource (it looks for the highest
 #   the top version of the resource?  Not yet clear from the  #   past version and then returns that +1)
 #   code in currentversion.  
 #  #
 # 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).
   #                 (Should consist of an absolute path to a file)
 #    $client   - File descriptor connected to client.  #    $client   - File descriptor connected to client.
 # Returns  # Returns
 #     0        - Requested to exit, caller should shut down.  #     0        - Requested to exit, caller should shut down.
Line 2341  sub put_user_profile_entry { Line 2306  sub put_user_profile_entry {
  my ($key,$value)=split(/=/,$pair);   my ($key,$value)=split(/=/,$pair);
  $hashref->{$key}=$value;   $hashref->{$key}=$value;
     }      }
     if (untie(%$hashref)) {      if (&untie_user_hash($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 ".
Line 2349  sub put_user_profile_entry { Line 2314  sub put_user_profile_entry {
  $userinput);   $userinput);
     }      }
  } else {   } else {
     &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".      &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
      "while attempting put\n", $userinput);       "while attempting put\n", $userinput);
  }   }
     } else {      } else {
Line 2360  sub put_user_profile_entry { Line 2325  sub put_user_profile_entry {
 }  }
 &register_handler("put", \&put_user_profile_entry, 0, 1, 0);  &register_handler("put", \&put_user_profile_entry, 0, 1, 0);
   
   #   Put a piece of new data in hash, returns error if entry already exists
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   #
   sub newput_user_profile_entry {
       my ($cmd, $tail, $client)  = @_;
   
       my $userinput = "$cmd:$tail";
   
       my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
       if ($namespace eq 'roles') {
           &Failure( $client, "refused\n", $userinput);
    return 1;
       }
   
       chomp($what);
   
       my $hashref = &tie_user_hash($udom, $uname, $namespace,
    &GDBM_WRCREAT(),"N",$what);
       if(!$hashref) {
    &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
     "while attempting put\n", $userinput);
    return 1;
       }
   
       my @pairs=split(/\&/,$what);
       foreach my $pair (@pairs) {
    my ($key,$value)=split(/=/,$pair);
    if (exists($hashref->{$key})) {
       &Failure($client, "key_exists: ".$key."\n",$userinput);
       return 1;
    }
       }
   
       foreach my $pair (@pairs) {
    my ($key,$value)=split(/=/,$pair);
    $hashref->{$key}=$value;
       }
   
       if (&untie_user_hash($hashref)) {
    &Reply( $client, "ok\n", $userinput);
       } else {
    &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
    "while attempting put\n", 
    $userinput);
       }
       return 1;
   }
   &register_handler("newput", \&newput_user_profile_entry, 0, 1, 0);
   
 #   # 
 #   Increment a profile entry in the user history file.  #   Increment a profile entry in the user history file.
 #   The history contains keyword value pairs.  In this case,  #   The history contains keyword value pairs.  In this case,
Line 2390  sub increment_user_value_handler { Line 2410  sub increment_user_value_handler {
     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);
                   $value = &unescape($value);
  # 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}+=$value;
                   if ($namespace eq 'nohist_resourcetracker') {
                       if ($hashref->{$key} < 0) {
                           $hashref->{$key} = 0;
                       }
                   }
     }      }
     if (untie(%$hashref)) {      if (&untie_user_hash($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 ".
Line 2463  sub roles_put_handler { Line 2489  sub roles_put_handler {
        $auth_type);         $auth_type);
     $hashref->{$key}=$value;      $hashref->{$key}=$value;
  }   }
  if (untie($hashref)) {   if (&untie_user_hash($hashref)) {
     &Reply($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 ".
Line 2514  sub roles_delete_handler { Line 2540  sub roles_delete_handler {
  foreach my $key (@rolekeys) {   foreach my $key (@rolekeys) {
     delete $hashref->{$key};      delete $hashref->{$key};
  }   }
  if (untie(%$hashref)) {   if (&untie_user_hash($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 ".
Line 2593  sub get_profile_entry_encrypted { Line 2619  sub get_profile_entry_encrypted {
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
         
     my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);      my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
     chomp($what);      chomp($what);
     my $qresult = read_profile($udom, $uname, $namespace, $what);      my $qresult = read_profile($udom, $uname, $namespace, $what);
     my ($first) = split(/:/, $qresult);      my ($first) = split(/:/, $qresult);
Line 2655  sub delete_profile_entry { Line 2681  sub delete_profile_entry {
  foreach my $key (@keys) {   foreach my $key (@keys) {
     delete($hashref->{$key});      delete($hashref->{$key});
  }   }
  if (untie(%$hashref)) {   if (&untie_user_hash($hashref)) {
     &Reply($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 ".
Line 2697  sub get_profile_keys { Line 2723  sub get_profile_keys {
  foreach my $key (keys %$hashref) {   foreach my $key (keys %$hashref) {
     $qresult.="$key&";      $qresult.="$key&";
  }   }
  if (untie(%$hashref)) {   if (&untie_user_hash($hashref)) {
     $qresult=~s/\&$//;      $qresult=~s/\&$//;
     &Reply($client, "$qresult\n", $userinput);      &Reply($client, "$qresult\n", $userinput);
  } else {   } else {
Line 2758  sub dump_profile_database { Line 2784  sub dump_profile_database {
     $data{$symb}->{$param}=$value;      $data{$symb}->{$param}=$value;
     $data{$symb}->{'v.'.$param}=$v;      $data{$symb}->{'v.'.$param}=$v;
  }   }
  if (untie(%$hashref)) {   if (&untie_user_hash($hashref)) {
     while (my ($symb,$param_hash) = each(%data)) {      while (my ($symb,$param_hash) = each(%data)) {
  while(my ($param,$value) = each (%$param_hash)){   while(my ($param,$value) = each (%$param_hash)){
     next if ($param =~ /^v\./);       # Ignore versions...      next if ($param =~ /^v\./);       # Ignore versions...
Line 2813  sub dump_with_regexp { Line 2839  sub dump_with_regexp {
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);      my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
     if (defined($regexp)) {      if (defined($regexp)) {
  $regexp=&unescape($regexp);   $regexp=&unescape($regexp);
     } else {      } else {
  $regexp='.';   $regexp='.';
     }      }
       my ($start,$end);
       if (defined($range)) {
    if ($range =~/^(\d+)\-(\d+)$/) {
       ($start,$end) = ($1,$2);
    } elsif ($range =~/^(\d+)$/) {
       ($start,$end) = (0,$1);
    } else {
       undef($range);
    }
       }
     my $hashref = &tie_user_hash($udom, $uname, $namespace,      my $hashref = &tie_user_hash($udom, $uname, $namespace,
  &GDBM_READER());   &GDBM_READER());
     if ($hashref) {      if ($hashref) {
         my $qresult='';          my $qresult='';
    my $count=0;
  while (my ($key,$value) = each(%$hashref)) {   while (my ($key,$value) = each(%$hashref)) {
     if ($regexp eq '.') {      if ($regexp eq '.') {
    $count++;
    if (defined($range) && $count >= $end)   { last; }
    if (defined($range) && $count <  $start) { next; }
  $qresult.=$key.'='.$value.'&';   $qresult.=$key.'='.$value.'&';
     } else {      } else {
  my $unescapeKey = &unescape($key);   my $unescapeKey = &unescape($key);
  if (eval('$unescapeKey=~/$regexp/')) {   if (eval('$unescapeKey=~/$regexp/')) {
       $count++;
       if (defined($range) && $count >= $end)   { last; }
       if (defined($range) && $count <  $start) { next; }
     $qresult.="$key=$value&";      $qresult.="$key=$value&";
  }   }
     }      }
  }   }
  if (untie(%$hashref)) {   if (&untie_user_hash($hashref)) {
     chop($qresult);      chop($qresult);
     &Reply($client, "$qresult\n", $userinput);      &Reply($client, "$qresult\n", $userinput);
  } else {   } else {
Line 2895  sub store_handler { Line 2938  sub store_handler {
     $hashref->{"$version:$rid:timestamp"}=$now;      $hashref->{"$version:$rid:timestamp"}=$now;
     $allkeys.='timestamp';      $allkeys.='timestamp';
     $hashref->{"$version:keys:$rid"}=$allkeys;      $hashref->{"$version:keys:$rid"}=$allkeys;
     if (untie($hashref)) {      if (&untie_user_hash($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 ".
Line 2913  sub store_handler { Line 2956  sub store_handler {
 }  }
 &register_handler("store", \&store_handler, 0, 1, 0);  &register_handler("store", \&store_handler, 0, 1, 0);
   
   #  Modify a set of key=value pairs associated with a versioned name.
   #
   #  Parameters:
   #    $cmd                - Request command keyword.
   #    $tail               - Tail of the request.  This is a colon
   #                          separated list containing:
   #                          domain/user - User and authentication domain.
   #                          namespace   - Name of the database being modified
   #                          rid         - Resource keyword to modify.
   #                          v           - Version item to modify
   #                          what        - new value associated with rid.
   #
   #    $client             - Socket open on the client.
   #
   #
   #  Returns:
   #      1 (keep on processing).
   #  Side-Effects:
   #    Writes to the client
   sub putstore_handler {
       my ($cmd, $tail, $client) = @_;
    
       my $userinput = "$cmd:$tail";
   
       my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail);
       if ($namespace ne 'roles') {
   
    chomp($what);
    my $hashref  = &tie_user_hash($udom, $uname, $namespace,
          &GDBM_WRCREAT(), "M",
          "$rid:$v:$what");
    if ($hashref) {
       my $now = time;
       my %data = &hash_extract($what);
       my @allkeys;
       while (my($key,$value) = each(%data)) {
    push(@allkeys,$key);
    $hashref->{"$v:$rid:$key"} = $value;
       }
       my $allkeys = join(':',@allkeys);
       $hashref->{"$v:keys:$rid"}=$allkeys;
   
       if (&untie_user_hash($hashref)) {
    &Reply($client, "ok\n", $userinput);
       } else {
    &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
    "while attempting store\n", $userinput);
       }
    } else {
       &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
        "while attempting store\n", $userinput);
    }
       } else {
    &Failure($client, "refused\n", $userinput);
       }
   
       return 1;
   }
   &register_handler("putstore", \&putstore_handler, 0, 1, 0);
   
   sub hash_extract {
       my ($str)=@_;
       my %hash;
       foreach my $pair (split(/\&/,$str)) {
    my ($key,$value)=split(/=/,$pair);
    $hash{$key}=$value;
       }
       return (%hash);
   }
   sub hash_to_str {
       my ($hash_ref)=@_;
       my $str;
       foreach my $key (keys(%$hash_ref)) {
    $str.=$key.'='.$hash_ref->{$key}.'&';
       }
       $str=~s/\&$//;
       return $str;
   }
   
 #  #
 #  Dump out all versions of a resource that has key=value pairs associated  #  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  # with it for each version.  These resources are built up via the store
Line 2942  sub restore_handler { Line 3064  sub restore_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
   
     my $userinput = "$cmd:$tail"; # Only used for logging purposes.      my $userinput = "$cmd:$tail"; # Only used for logging purposes.
       my ($udom,$uname,$namespace,$rid) = split(/:/,$tail);
     my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);  
     $namespace=~s/\//\_/g;      $namespace=~s/\//\_/g;
     $namespace=~s/\W//g;      $namespace = &LONCAPA::clean_username($namespace);
   
     chomp($rid);      chomp($rid);
     my $proname=&propath($udom,$uname);  
     my $qresult='';      my $qresult='';
     my %hash;      my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
     if (tie(%hash,'GDBM_File',"$proname/$namespace.db",      if ($hashref) {
     &GDBM_READER(),0640)) {   my $version=$hashref->{"version:$rid"};
  my $version=$hash{"version:$rid"};  
  $qresult.="version=$version&";   $qresult.="version=$version&";
  my $scope;   my $scope;
  for ($scope=1;$scope<=$version;$scope++) {   for ($scope=1;$scope<=$version;$scope++) {
     my $vkeys=$hash{"$scope:keys:$rid"};      my $vkeys=$hashref->{"$scope:keys:$rid"};
     my @keys=split(/:/,$vkeys);      my @keys=split(/:/,$vkeys);
     my $key;      my $key;
     $qresult.="$scope:keys=$vkeys&";      $qresult.="$scope:keys=$vkeys&";
     foreach $key (@keys) {      foreach $key (@keys) {
  $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";   $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
     }                                        }                                  
  }   }
  if (untie(%hash)) {   if (&untie_user_hash($hashref)) {
     $qresult=~s/\&$//;      $qresult=~s/\&$//;
     &Reply( $client, "$qresult\n", $userinput);      &Reply( $client, "$qresult\n", $userinput);
  } else {   } else {
Line 2983  sub restore_handler { Line 3103  sub restore_handler {
 &register_handler("restore", \&restore_handler, 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 a synchronous discussion board.
 #  #
 # Parameters:  # Parameters:
 #    $cmd                - Request keyword.  #    $cmd                - Request keyword.
 #    $tail               - Tail of the command. A colon separated list  #    $tail               - Tail of the command. A colon separated list
 #                          containing:  #                          containing:
 #                          cdom    - Domain on which the chat board lives  #                          cdom    - Domain on which the chat board lives
 #                          cnum    - Identifier of the discussion group.  #                          cnum    - Course containing the chat board.
 #                          post    - Body of the posting.  #                          newpost - Body of the posting.
   #                          group   - Optional group, if chat board is only 
   #                                    accessible in a group within the course 
 #   $client              - Socket open on the client.  #   $client              - Socket open on the client.
 # Returns:  # Returns:
 #   1    - Indicating caller should keep on processing.  #   1    - Indicating caller should keep on processing.
Line 3006  sub send_chat_handler { Line 3128  sub send_chat_handler {
           
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($cdom,$cnum,$newpost)=split(/\:/,$tail);      my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
     &chat_add($cdom,$cnum,$newpost);      &chat_add($cdom,$cnum,$newpost,$group);
     &Reply($client, "ok\n", $userinput);      &Reply($client, "ok\n", $userinput);
   
     return 1;      return 1;
Line 3015  sub send_chat_handler { Line 3137  sub send_chat_handler {
 &register_handler("chatsend", \&send_chat_handler, 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 messages from a discussion board.
 #  #
 #  Parameters:  #  Parameters:
 #    $cmd             - Command keyword that initiated the request.  #    $cmd             - Command keyword that initiated the request.
Line 3025  sub send_chat_handler { Line 3147  sub send_chat_handler {
 #                       chat id        - Discussion thread(?)  #                       chat id        - Discussion thread(?)
 #                       domain/user    - Authentication domain and username  #                       domain/user    - Authentication domain and username
 #                                        of the requesting person.  #                                        of the requesting person.
   #                       group          - Optional course group containing
   #                                        the board.      
 #   $client           - Socket open on the client program.  #   $client           - Socket open on the client program.
 # Returns:  # Returns:
 #    1     - continue processing  #    1     - continue processing
Line 3037  sub retrieve_chat_handler { Line 3161  sub retrieve_chat_handler {
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);      my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
     my $reply='';      my $reply='';
     foreach (&get_chat($cdom,$cnum,$udom,$uname)) {      foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
  $reply.=&escape($_).':';   $reply.=&escape($_).':';
     }      }
     $reply=~s/\:$//;      $reply=~s/\:$//;
Line 3116  sub reply_query_handler { Line 3240  sub reply_query_handler {
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($cmd,$id,$reply)=split(/:/,$userinput);       my ($id,$reply)=split(/:/,$tail); 
     my $store;      my $store;
     my $execdir=$perlvar{'lonDaemons'};      my $execdir=$perlvar{'lonDaemons'};
     if ($store=IO::File->new(">$execdir/tmp/$id")) {      if ($store=IO::File->new(">$execdir/tmp/$id")) {
Line 3180  sub put_course_id_handler { Line 3304  sub put_course_id_handler {
  foreach my $pair (@pairs) {   foreach my $pair (@pairs) {
             my ($key,$courseinfo) = split(/=/,$pair,2);              my ($key,$courseinfo) = split(/=/,$pair,2);
             $courseinfo =~ s/=/:/g;              $courseinfo =~ s/=/:/g;
               if (defined($hashref->{$key})) {
             my @current_items = split(/:/,$hashref->{$key});                  my $value = &Apache::lonnet::thaw_unescape($hashref->{$key});
                   if (ref($value) eq 'HASH') {
                       my @items = ('description','inst_code','owner','type');
                       my @new_items = split(/:/,$courseinfo,-1);
                       my %storehash; 
                       for (my $i=0; $i<@new_items; $i++) {
                           $storehash{$items[$i]} = $new_items[$i];
                       }
                       $hashref->{$key} = 
                           &Apache::lonnet::freeze_escape(\%storehash);
                       my $unesc_key = &unescape($key);
                       $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
                       next;
                   }
               }
               my @current_items = split(/:/,$hashref->{$key},-1);
             shift(@current_items); # remove description              shift(@current_items); # remove description
             pop(@current_items);   # remove last access              pop(@current_items);   # remove last access
             my $numcurrent = scalar(@current_items);              my $numcurrent = scalar(@current_items);
               if ($numcurrent > 3) {
             my @new_items = split(/:/,$courseinfo);                  $numcurrent = 3;
               }
               my @new_items = split(/:/,$courseinfo,-1);
             my $numnew = scalar(@new_items);              my $numnew = scalar(@new_items);
             if ($numcurrent > 0) {              if ($numcurrent > 0) {
                 if ($numnew == 1) { # flushcourselogs() from 1.1 or earlier                  if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2 
                     $courseinfo .= ':'.join(':',@current_items);                      for (my $j=$numcurrent-$numnew; $j>=0; $j--) {
                 } elsif ($numnew == 2) { # flushcourselogs() from 1.2.X                          $courseinfo .= ':'.$current_items[$numcurrent-$j-1];
                     $courseinfo .= ':'.$current_items[$numcurrent-1];                      }
                 }                  }
             }              }
     $hashref->{$key}=$courseinfo.':'.$now;              $hashref->{$key}=$courseinfo.':'.$now;
  }   }
  if (untie(%$hashref)) {   if (&untie_domain_hash($hashref)) {
     &Reply( $client, "ok\n", $userinput);      &Reply( $client, "ok\n", $userinput);
  } else {   } else {
     &Failure($client, "error: ".($!+0)      &Failure($client, "error: ".($!+0)
Line 3209  sub put_course_id_handler { Line 3350  sub put_course_id_handler {
  ." tie(GDBM) Failed ".   ." tie(GDBM) Failed ".
  "while attempting courseidput\n", $userinput);   "while attempting courseidput\n", $userinput);
     }      }
       
   
     return 1;      return 1;
 }  }
 &register_handler("courseidput", \&put_course_id_handler, 0, 1, 0);  &register_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
   
   sub put_course_id_hash_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my ($udom,$mode,$what) = split(/:/, $tail,3);
       chomp($what);
       my $now=time;
       my @pairs=split(/\&/,$what);
       my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
       if ($hashref) {
           foreach my $pair (@pairs) {
               my ($key,$value)=split(/=/,$pair);
               my $unesc_key = &unescape($key);
               if ($mode ne 'timeonly') {
                   if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) {
                       my $curritems = &Apache::lonnet::thaw_unescape($key); 
                       if (ref($curritems) ne 'HASH') {
                           my @current_items = split(/:/,$hashref->{$key},-1);
                           my $lasttime = pop(@current_items);
                           $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime;
                       } else {
                           $hashref->{&escape('lasttime:'.$unesc_key)} = '';
                       }
                   } 
                   $hashref->{$key} = $value;
               }
               if ($mode ne 'notime') {
                   $hashref->{&escape('lasttime:'.$unesc_key)} = $now;
               }
           }
           if (&untie_domain_hash($hashref)) {
               &Reply($client, "ok\n", $userinput);
           } else {
               &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                        "while attempting courseidputhash\n", $userinput);
           }
       } else {
           &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                     "while attempting courseidputhash\n", $userinput);
       }
       return 1;
   }
   &register_handler("courseidputhash", \&put_course_id_hash_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
 #  keyword pattern are optional.  If the starting date is not supplied it  #  keyword pattern are optional.  If the starting date is not supplied it
Line 3236  sub put_course_id_handler { Line 3419  sub put_course_id_handler {
 #                 institutional code - optional supplied code to filter   #                 institutional code - optional supplied code to filter 
 #                            the dump. Only courses with an institutional code   #                            the dump. Only courses with an institutional code 
 #                            that match the supplied code will be returned.  #                            that match the supplied code will be returned.
 #                 owner    - optional supplied username of owner to filter  #                 owner    - optional supplied username and domain of owner to
 #                            the dump.  Only courses for which the course   #                            filter the dump.  Only courses for which the course
 #                            owner matches the supplied username will be  #                            owner matches the supplied username and/or domain
 #                            returned. Implicit assumption that owner  #                            will be returned. Pre-2.2.0 legacy entries from 
 #                            is a user in the domain in which the  #                            nohist_courseiddump will only contain usernames.
 #                            course database is defined.  #                 type     - optional parameter for selection 
   #                 regexp_ok - if true, allow the supplied institutional code
   #                            filter to behave as a regular expression.  
   #                 rtn_as_hash - whether to return the information available for
   #                            each matched item as a frozen hash of all 
   #                            key, value pairs in the item's hash, or as a 
   #                            colon-separated list of (in order) description,
   #                            institutional code, and course owner.
   #    
 #     $client  - The socket open on the client.  #     $client  - The socket open on the client.
 # Returns:  # Returns:
 #    1     - Continue processing.  #    1     - Continue processing.
Line 3249  sub put_course_id_handler { Line 3440  sub put_course_id_handler {
 #   a reply is written to $client.  #   a reply is written to $client.
 sub dump_course_id_handler {  sub dump_course_id_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter) =split(/:/,$tail);      my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
           $typefilter,$regexp_ok,$rtn_as_hash) =split(/:/,$tail);
     if (defined($description)) {      if (defined($description)) {
  $description=&unescape($description);   $description=&unescape($description);
     } else {      } else {
Line 3263  sub dump_course_id_handler { Line 3454  sub dump_course_id_handler {
     } else {      } else {
         $instcodefilter='.';          $instcodefilter='.';
     }      }
       my ($ownerunamefilter,$ownerdomfilter);
     if (defined($ownerfilter)) {      if (defined($ownerfilter)) {
         $ownerfilter=&unescape($ownerfilter);          $ownerfilter=&unescape($ownerfilter);
           if ($ownerfilter ne '.' && defined($ownerfilter)) {
               if ($ownerfilter =~ /^([^:]*):([^:]*)$/) {
                    $ownerunamefilter = $1;
                    $ownerdomfilter = $2;
               } else {
                   $ownerunamefilter = $ownerfilter;
                   $ownerdomfilter = '';
               }
           }
     } else {      } else {
         $ownerfilter='.';          $ownerfilter='.';
     }      }
   
     if (defined($coursefilter)) {      if (defined($coursefilter)) {
         $coursefilter=&unescape($coursefilter);          $coursefilter=&unescape($coursefilter);
     } else {      } else {
         $coursefilter='.';          $coursefilter='.';
     }      }
       if (defined($typefilter)) {
     unless (defined($since)) { $since=0; }          $typefilter=&unescape($typefilter);
       } else {
           $typefilter='.';
       }
       if (defined($regexp_ok)) {
           $regexp_ok=&unescape($regexp_ok);
       }
       my $unpack = 1;
       if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' && 
           $typefilter eq '.') {
           $unpack = 0;
       }
       if (!defined($since)) { $since=0; }
     my $qresult='';      my $qresult='';
     my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());      my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
     if ($hashref) {      if ($hashref) {
  while (my ($key,$value) = each(%$hashref)) {   while (my ($key,$value) = each(%$hashref)) {
     my ($descr,$lasttime,$inst_code,$owner);              my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,%unesc_val);
             my @courseitems = split(/:/,$value);              $unesc_key = &unescape($key);
             $lasttime = pop(@courseitems);              if ($unesc_key =~ /^lasttime:/) {
     ($descr,$inst_code,$owner)=@courseitems;                  next;
     if ($lasttime<$since) { next; }              } else {
                   $lasttime_key = &escape('lasttime:'.$unesc_key);
               }
               if ($hashref->{$lasttime_key} ne '') {
                   $lasttime = $hashref->{$lasttime_key};
                   next if ($lasttime<$since);
               }
               my $items = &Apache::lonnet::thaw_unescape($value);
               if (ref($items) eq 'HASH') {
                   $is_hash =  1;
                   if ($unpack || !$rtn_as_hash) {
                       $unesc_val{'descr'} = $items->{'description'};
                       $unesc_val{'inst_code'} = $items->{'inst_code'};
                       $unesc_val{'owner'} = $items->{'owner'};
                       $unesc_val{'type'} = $items->{'type'};
                   }
               } else {
                   $is_hash =  0;
                   my @courseitems = split(/:/,&unescape($value));
                   $lasttime = pop(@courseitems);
                   next if ($lasttime<$since);
           ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
               }
             my $match = 1;              my $match = 1;
     unless ($description eq '.') {      if ($description ne '.') {
  my $unescapeDescr = &unescape($descr);                  if (!$is_hash) {
  unless (eval('$unescapeDescr=~/\Q$description\E/i')) {                      $unesc_val{'descr'} = &unescape($val{'descr'});
                   }
                   if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) {
                     $match = 0;                      $match = 0;
  }                  }
             }              }
             unless ($instcodefilter eq '.' || !defined($instcodefilter)) {              if ($instcodefilter ne '.') {
                 my $unescapeInstcode = &unescape($inst_code);                  if (!$is_hash) {
                 unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {                      $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
                     $match = 0;                  }
                   if ($regexp_ok) {
                       if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
                           $match = 0;
                       }
                   } else {
                       if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
                           $match = 0;
                       }
                 }                  }
     }      }
             unless ($ownerfilter eq '.' || !defined($ownerfilter)) {              if ($ownerfilter ne '.') {
                 my $unescapeOwner = &unescape($owner);                  if (!$is_hash) {
                 unless (eval('$unescapeOwner=~/\Q$ownerfilter\E/i')) {                      $unesc_val{'owner'} = &unescape($val{'owner'});
                     $match = 0;                  }
                   if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) {
                       if ($unesc_val{'owner'} =~ /:/) {
                           if (eval{$unesc_val{'owner'} !~ 
                                /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) {
                               $match = 0;
                           } 
                       } else {
                           if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
                               $match = 0;
                           }
                       }
                   } elsif ($ownerunamefilter ne '') {
                       if ($unesc_val{'owner'} =~ /:/) {
                           if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) {
                                $match = 0;
                           }
                       } else {
                           if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) {
                               $match = 0;
                           }
                       }
                   } elsif ($ownerdomfilter ne '') {
                       if ($unesc_val{'owner'} =~ /:/) {
                           if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) {
                                $match = 0;
                           }
                       } else {
                           if ($ownerdomfilter ne $udom) {
                               $match = 0;
                           }
                       }
                 }                  }
             }              }
             unless ($coursefilter eq '.' || !defined($coursefilter)) {              if ($coursefilter ne '.') {
                 my $unescapeCourse = &unescape($key);                  if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) {
                 unless (eval('$unescapeCourse=~/^$udom(_)\Q$coursefilter\E$/')) {  
                     $match = 0;                      $match = 0;
                 }                  }
             }              }
               if ($typefilter ne '.') {
                   if (!$is_hash) {
                       $unesc_val{'type'} = &unescape($val{'type'});
                   }
                   if ($unesc_val{'type'} eq '') {
                       if ($typefilter ne 'Course') {
                           $match = 0;
                       }
                   } else {
                       if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) {
                           $match = 0;
                       }
                   }
               }
             if ($match == 1) {              if ($match == 1) {
                 $qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';                  if ($rtn_as_hash) {
                       if ($is_hash) {
                           $qresult.=$key.'='.$value.'&';
                       } else {
                           my %rtnhash = ( 'description' => &escape($val{'descr'}),
                                           'inst_code' => &escape($val{'inst_code'}),
                                           'owner'     => &escape($val{'owner'}),
                                           'type'      => &escape($val{'type'}),
                                         );
                           my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
                           $qresult.=$key.'='.$items.'&';
                       }
                   } else {
                       if ($is_hash) {
                           $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'.
                                       &escape($unesc_val{'inst_code'}).':'.
                                       &escape($unesc_val{'owner'}).'&';
                       } else {
                           $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}.
                                       ':'.$val{'owner'}.'&';
                       }
                   }
             }              }
  }   }
  if (untie(%$hashref)) {   if (&untie_domain_hash($hashref)) {
     chop($qresult);      chop($qresult);
     &Reply($client, "$qresult\n", $userinput);      &Reply($client, "$qresult\n", $userinput);
  } else {   } else {
Line 3324  sub dump_course_id_handler { Line 3635  sub dump_course_id_handler {
  &Failure($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;
   }
   &register_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
   
   #
   # Puts an unencrypted entry in a namespace db file at the domain level 
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   #  Side effects:
   #     reply is written to $client.
   #
   sub put_domain_handler {
       my ($cmd,$tail,$client) = @_;
   
       my $userinput = "$cmd:$tail";
   
       my ($udom,$namespace,$what) =split(/:/,$tail,3);
       chomp($what);
       my @pairs=split(/\&/,$what);
       my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(),
                                      "P", $what);
       if ($hashref) {
           foreach my $pair (@pairs) {
               my ($key,$value)=split(/=/,$pair);
               $hashref->{$key}=$value;
           }
           if (&untie_domain_hash($hashref)) {
               &Reply($client, "ok\n", $userinput);
           } else {
               &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                        "while attempting putdom\n", $userinput);
           }
       } else {
           &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                     "while attempting putdom\n", $userinput);
       }
   
     return 1;      return 1;
 }  }
 &register_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);  &register_handler("putdom", \&put_domain_handler, 0, 1, 0);
   
   # Unencrypted get from the namespace database file at the domain level.
   # This function retrieves a keyed item from a specific named database in the
   # domain directory.
   #
   # Parameters:
   #   $cmd             - Command request keyword (get).
   #   $tail            - Tail of the command.  This is a colon separated list
   #                      consisting of the domain and the 'namespace' 
   #                      which selects the gdbm file to do the lookup in,
   #                      & separated list of keys to lookup.  Note that
   #                      the values are returned as an & separated list too.
   #   $client          - File descriptor open on the client.
   # Returns:
   #   1       - Continue processing.
   #   0       - Exit.
   #  Side effects:
   #     reply is written to $client.
   #
   
   sub get_domain_handler {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$client:$tail";
   
       my ($udom,$namespace,$what)=split(/:/,$tail,3);
       chomp($what);
       my @queries=split(/\&/,$what);
       my $qresult='';
       my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
       if ($hashref) {
           for (my $i=0;$i<=$#queries;$i++) {
               $qresult.="$hashref->{$queries[$i]}&";
           }
           if (&untie_domain_hash($hashref)) {
               $qresult=~s/\&$//;
               &Reply($client, "$qresult\n", $userinput);
           } else {
               &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
                         "while attempting getdom\n",$userinput);
           }
       } else {
           &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                    "while attempting getdom\n",$userinput);
       }
   
       return 1;
   }
   &register_handler("getdom", \&get_domain_handler, 0, 1, 0);
   
   
 #  #
 #  Puts an id to a domains id database.   #  Puts an id to a domains id database. 
Line 3362  sub put_id_handler { Line 3764  sub put_id_handler {
     my ($key,$value)=split(/=/,$pair);      my ($key,$value)=split(/=/,$pair);
     $hashref->{$key}=$value;      $hashref->{$key}=$value;
  }   }
  if (untie(%$hashref)) {   if (&untie_domain_hash($hashref)) {
     &Reply($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 ".
Line 3411  sub get_id_handler { Line 3813  sub get_id_handler {
  for (my $i=0;$i<=$#queries;$i++) {   for (my $i=0;$i<=$#queries;$i++) {
     $qresult.="$hashref->{$queries[$i]}&";      $qresult.="$hashref->{$queries[$i]}&";
  }   }
  if (untie(%$hashref)) {   if (&untie_domain_hash($hashref)) {
     $qresult=~s/\&$//;      $qresult=~s/\&$//;
     &Reply($client, "$qresult\n", $userinput);      &Reply($client, "$qresult\n", $userinput);
  } else {   } else {
Line 3428  sub get_id_handler { Line 3830  sub get_id_handler {
 &register_handler("idget", \&get_id_handler, 0, 1, 0);  &register_handler("idget", \&get_id_handler, 0, 1, 0);
   
 #  #
   # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database 
   #
   # Parameters
   #   $cmd       - Command keyword that caused us to be dispatched.
   #   $tail      - Tail of the command.  Consists of a colon separated:
   #               domain - the domain whose dcmail we are recording
   #               email    Consists of key=value pair 
   #                        where key is unique msgid
   #                        and value is message (in XML)
   #   $client    - Socket open on the client.
   #
   # Returns:
   #    1 - indicating processing should continue.
   # Side effects
   #     reply is written to $client.
   #
   sub put_dcmail_handler {
       my ($cmd,$tail,$client) = @_;
       my $userinput = "$cmd:$tail";
                                                                                   
       my ($udom,$what)=split(/:/,$tail);
       chomp($what);
       my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
       if ($hashref) {
           my ($key,$value)=split(/=/,$what);
           $hashref->{$key}=$value;
       }
       if (&untie_domain_hash($hashref)) {
           &Reply($client, "ok\n", $userinput);
       } else {
           &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                    "while attempting dcmailput\n", $userinput);
       }
       return 1;
   }
   &register_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);
   
   #
   # Retrieves broadcast e-mail from nohist_dcmail database
   # Returns to client an & separated list of key=value pairs,
   # where key is msgid and value is message information.
   #
   # Parameters
   #   $cmd       - Command keyword that caused us to be dispatched.
   #   $tail      - Tail of the command.  Consists of a colon separated:
   #               domain - the domain whose dcmail table we dump
   #               startfilter - beginning of time window 
   #               endfilter - end of time window
   #               sendersfilter - & separated list of username:domain 
   #                 for senders to search for.
   #   $client    - Socket open on the client.
   #
   # Returns:
   #    1 - indicating processing should continue.
   # Side effects
   #     reply (& separated list of msgid=messageinfo pairs) is 
   #     written to $client.
   #
   sub dump_dcmail_handler {
       my ($cmd, $tail, $client) = @_;
                                                                                   
       my $userinput = "$cmd:$tail";
       my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
       chomp($sendersfilter);
       my @senders = ();
       if (defined($startfilter)) {
           $startfilter=&unescape($startfilter);
       } else {
           $startfilter='.';
       }
       if (defined($endfilter)) {
           $endfilter=&unescape($endfilter);
       } else {
           $endfilter='.';
       }
       if (defined($sendersfilter)) {
           $sendersfilter=&unescape($sendersfilter);
    @senders = map { &unescape($_) } split(/\&/,$sendersfilter);
       }
   
       my $qresult='';
       my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
       if ($hashref) {
           while (my ($key,$value) = each(%$hashref)) {
               my $match = 1;
               my ($timestamp,$subj,$uname,$udom) = 
    split(/:/,&unescape(&unescape($key)),5); # yes, twice really
               $subj = &unescape($subj);
               unless ($startfilter eq '.' || !defined($startfilter)) {
                   if ($timestamp < $startfilter) {
                       $match = 0;
                   }
               }
               unless ($endfilter eq '.' || !defined($endfilter)) {
                   if ($timestamp > $endfilter) {
                       $match = 0;
                   }
               }
               unless (@senders < 1) {
                   unless (grep/^$uname:$udom$/,@senders) {
                       $match = 0;
                   }
               }
               if ($match == 1) {
                   $qresult.=$key.'='.$value.'&';
               }
           }
           if (&untie_domain_hash($hashref)) {
               chop($qresult);
               &Reply($client, "$qresult\n", $userinput);
           } else {
               &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                       "while attempting dcmaildump\n", $userinput);
           }
       } else {
           &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   "while attempting dcmaildump\n", $userinput);
       }
       return 1;
   }
   
   &register_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);
   
   #
   # Puts domain roles in nohist_domainroles database
   #
   # Parameters
   #   $cmd       - Command keyword that caused us to be dispatched.
   #   $tail      - Tail of the command.  Consists of a colon separated:
   #               domain - the domain whose roles we are recording  
   #               role -   Consists of key=value pair
   #                        where key is unique role
   #                        and value is start/end date information
   #   $client    - Socket open on the client.
   #
   # Returns:
   #    1 - indicating processing should continue.
   # Side effects
   #     reply is written to $client.
   #
   
   sub put_domainroles_handler {
       my ($cmd,$tail,$client) = @_;
   
       my $userinput = "$cmd:$tail";
       my ($udom,$what)=split(/:/,$tail);
       chomp($what);
       my @pairs=split(/\&/,$what);
       my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
       if ($hashref) {
           foreach my $pair (@pairs) {
               my ($key,$value)=split(/=/,$pair);
               $hashref->{$key}=$value;
           }
           if (&untie_domain_hash($hashref)) {
               &Reply($client, "ok\n", $userinput);
           } else {
               &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                        "while attempting domroleput\n", $userinput);
           }
       } else {
           &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                     "while attempting domroleput\n", $userinput);
       }
                                                                                     
       return 1;
   }
   
   &register_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);
   
   #
   # Retrieves domain roles from nohist_domainroles database
   # Returns to client an & separated list of key=value pairs,
   # where key is role and value is start and end date information.
   #
   # Parameters
   #   $cmd       - Command keyword that caused us to be dispatched.
   #   $tail      - Tail of the command.  Consists of a colon separated:
   #               domain - the domain whose domain roles table we dump
   #   $client    - Socket open on the client.
   #
   # Returns:
   #    1 - indicating processing should continue.
   # Side effects
   #     reply (& separated list of role=start/end info pairs) is
   #     written to $client.
   #
   sub dump_domainroles_handler {
       my ($cmd, $tail, $client) = @_;
                                                                                              
       my $userinput = "$cmd:$tail";
       my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
       chomp($rolesfilter);
       my @roles = ();
       if (defined($startfilter)) {
           $startfilter=&unescape($startfilter);
       } else {
           $startfilter='.';
       }
       if (defined($endfilter)) {
           $endfilter=&unescape($endfilter);
       } else {
           $endfilter='.';
       }
       if (defined($rolesfilter)) {
           $rolesfilter=&unescape($rolesfilter);
    @roles = split(/\&/,$rolesfilter);
       }
                                                                                              
       my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
       if ($hashref) {
           my $qresult = '';
           while (my ($key,$value) = each(%$hashref)) {
               my $match = 1;
               my ($start,$end) = split(/:/,&unescape($value));
               my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
               unless ($startfilter eq '.' || !defined($startfilter)) {
                   if ($start >= $startfilter) {
                       $match = 0;
                   }
               }
               unless ($endfilter eq '.' || !defined($endfilter)) {
                   if ($end <= $endfilter) {
                       $match = 0;
                   }
               }
               unless (@roles < 1) {
                   unless (grep/^$trole$/,@roles) {
                       $match = 0;
                   }
               }
               if ($match == 1) {
                   $qresult.=$key.'='.$value.'&';
               }
           }
           if (&untie_domain_hash($hashref)) {
               chop($qresult);
               &Reply($client, "$qresult\n", $userinput);
           } else {
               &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                       "while attempting domrolesdump\n", $userinput);
           }
       } else {
           &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   "while attempting domrolesdump\n", $userinput);
       }
       return 1;
   }
   
   &register_handler("domrolesdump", \&dump_domainroles_handler, 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
 # where Id is the client's ip concatenated with a sequence number.  # where Id is the client's ip concatenated with a sequence number.
Line 3449  sub tmp_put_handler { Line 4103  sub tmp_put_handler {
   
     my $userinput = "$cmd:$what"; # Reconstruct for logging.      my $userinput = "$cmd:$what"; # Reconstruct for logging.
   
       my ($record,$context) = split(/:/,$what);
     my $store;      if ($context ne '') {
           chomp($context);
           $context = &unescape($context);
       }
       my ($id,$store);
     $tmpsnum++;      $tmpsnum++;
     my $id=$$.'_'.$clientip.'_'.$tmpsnum;      if ($context eq 'resetpw') {
           $id = &md5_hex(&md5_hex(time.{}.rand().$$));
       } else {
           $id = $$.'_'.$clientip.'_'.$tmpsnum;
       }
     $id=~s/\W/\_/g;      $id=~s/\W/\_/g;
     $what=~s/\n//g;      $record=~s/\n//g;
     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")) {
  print $store $what;   print $store $record;
  close $store;   close $store;
  &Reply($client, "$id\n", $userinput);   &Reply($client, "$id\n", $userinput);
     } else {      } else {
Line 3674  sub enrollment_enabled_handler { Line 4336  sub enrollment_enabled_handler {
     my $userinput = $cmd.":".$tail; # For logging purposes.      my $userinput = $cmd.":".$tail; # For logging purposes.
   
           
     my $cdom = split(/:/, $tail);   # Domain we're asking about.      my ($cdom) = split(/:/, $tail, 2);   # Domain we're asking about.
   
     my $outcome  = &localenroll::run($cdom);      my $outcome  = &localenroll::run($cdom);
     &Reply($client, "$outcome\n", $userinput);      &Reply($client, "$outcome\n", $userinput);
   
Line 3730  sub validate_course_owner_handler { Line 4393  sub validate_course_owner_handler {
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
     my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);      my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);
   
       $owner = &unescape($owner);
     my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);      my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
     &Reply($client, "$outcome\n", $userinput);      &Reply($client, "$outcome\n", $userinput);
   
Line 3770  sub validate_course_section_handler { Line 4434  sub validate_course_section_handler {
 &register_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);  &register_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0);
   
 #  #
 #   Create a password for a new auto-enrollment user.  #   Validate course owner's access to enrollment data for specific class section. 
 #   I think/guess, this password allows access to the institutions   #   
 #   AIS class list server/services.  Stuart can correct this comment  
 #   when he finds out how wrong I am.  
 #  #
 # Formal Parameters:  # Formal Parameters:
 #    $cmd     - The command request that got us dispatched.  #    $cmd     - The command request that got us dispatched.
 #    $tail    - The tail of the command.   In this case this is a colon separated  #    $tail    - The tail of the command.   In this case this is a colon separated
 #               set of words that will be split into:  #               set of words that will be split into:
 #               $authparam - An authentication parameter (username??).  #               $inst_class  - Institutional code for the specific class section   
   #               $courseowner - The escaped username:domain of the course owner 
   #               $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 validate_class_access_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail);
       my @owners = split(/,/,&unescape($ownerlist));
       my $outcome;
       eval {
    local($SIG{__DIE__})='DEFAULT';
    $outcome=&localenroll::check_section($inst_class,\@owners,$cdom);
       };
       &Reply($client,"$outcome\n", $userinput);
   
       return 1;
   }
   &register_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
   
   #
   #   Create a password for a new LON-CAPA user added by auto-enrollment.
   #   Only used for case where authentication method for new user is localauth
   #
   # 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 (localauth parameter).
 #               $cdom      - The domain of the course from the institution's  #               $cdom      - The domain of the course from the institution's
 #                            point of view.  #                            point of view.
 #    $client  - The socket open on the client.  #    $client  - The socket open on the client.
Line 3886  sub get_institutional_code_format_handle Line 4581  sub get_institutional_code_format_handle
     \%cat_titles,      \%cat_titles,
     \%cat_order);      \%cat_order);
     if ($formatreply eq 'ok') {      if ($formatreply eq 'ok') {
  my $codes_str = &hash2str(%codes);   my $codes_str = &Apache::lonnet::hash2str(%codes);
  my $codetitles_str = &array2str(@codetitles);   my $codetitles_str = &Apache::lonnet::array2str(@codetitles);
  my $cat_titles_str = &hash2str(%cat_titles);   my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles);
  my $cat_order_str = &hash2str(%cat_order);   my $cat_order_str = &Apache::lonnet::hash2str(%cat_order);
  &Reply($client,   &Reply($client,
        $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'         $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'
        .$cat_order_str."\n",         .$cat_order_str."\n",
Line 3906  sub get_institutional_code_format_handle Line 4601  sub get_institutional_code_format_handle
 &register_handler("autoinstcodeformat",  &register_handler("autoinstcodeformat",
   \&get_institutional_code_format_handler,0,1,0);    \&get_institutional_code_format_handler,0,1,0);
   
   sub get_institutional_defaults_handler {
       my ($cmd, $tail, $client)   = @_;
       my $userinput               = "$cmd:$tail";
   
       my $dom = $tail;
       my %defaults_hash;
       my @code_order;
       my $outcome;
       eval {
           local($SIG{__DIE__})='DEFAULT';
           $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash,
                                                      \@code_order);
       };
       if (!$@) {
           if ($outcome eq 'ok') {
               my $result='';
               while (my ($key,$value) = each(%defaults_hash)) {
                   $result.=&escape($key).'='.&escape($value).'&';
               }
               $result .= 'code_order='.&escape(join('&',@code_order));
               &Reply($client,$result."\n",$userinput);
           } else {
               &Reply($client,"error\n", $userinput);
           }
       } else {
           &Failure($client,"unknown_cmd\n",$userinput);
       }
   }
   &register_handler("autoinstcodedefaults",
                     \&get_institutional_defaults_handler,0,1,0);
   
   sub get_institutional_user_rules {
       my ($cmd, $tail, $client)   = @_;
       my $userinput               = "$cmd:$tail";
       my $dom = &unescape($tail);
       my (%rules_hash,@rules_order);
       my $outcome;
       eval {
           local($SIG{__DIE__})='DEFAULT';
           $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order);
       };
       if (!$@) {
           if ($outcome eq 'ok') {
               my $result;
               foreach my $key (keys(%rules_hash)) {
                   $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&';
               }
               $result =~ s/\&$//;
               $result .= ':';
               if (@rules_order > 0) {
                   foreach my $item (@rules_order) {
                       $result .= &escape($item).'&';
                   }
               }
               $result =~ s/\&$//;
               &Reply($client,$result."\n",$userinput);
           } else {
               &Reply($client,"error\n", $userinput);
           }
       } else {
           &Failure($client,"unknown_cmd\n",$userinput);
       }
   }
   &register_handler("instuserrules",\&get_institutional_user_rules,0,1,0);
   
   
   sub institutional_username_check {
       my ($cmd, $tail, $client)   = @_;
       my $userinput               = "$cmd:$tail";
       my %rulecheck;
       my $outcome;
       my ($udom,$uname,@rules) = split(/:/,$tail);
       $udom = &unescape($udom);
       $uname = &unescape($uname);
       @rules = map {&unescape($_);} (@rules);
       eval {
           local($SIG{__DIE__})='DEFAULT';
           $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck);
       };
       if (!$@) {
           if ($outcome eq 'ok') {
               my $result='';
               foreach my $key (keys(%rulecheck)) {
                   $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&';
               }
               &Reply($client,$result."\n",$userinput);
           } else {
               &Reply($client,"error\n", $userinput);
           }
       } else {
           &Failure($client,"unknown_cmd\n",$userinput);
       }
   }
   &register_handler("instrulecheck",\&institutional_username_check,0,1,0);
   
   
   # Get domain specific conditions for import of student photographs to a course
   #
   # Retrieves information from photo_permission subroutine in localenroll.
   # Returns outcome (ok) if no processing errors, and whether course owner is 
   # required to accept conditions of use (yes/no).
   #
   #    
   sub photo_permission_handler {
       my ($cmd, $tail, $client)   = @_;
       my $userinput               = "$cmd:$tail";
       my $cdom = $tail;
       my ($perm_reqd,$conditions);
       my $outcome;
       eval {
    local($SIG{__DIE__})='DEFAULT';
    $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
     \$conditions);
       };
       if (!$@) {
    &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
          $userinput);
       } else {
    &Failure($client,"unknown_cmd\n",$userinput);
       }
       return 1;
   }
   &register_handler("autophotopermission",\&photo_permission_handler,0,1,0);
   
   #
   # Checks if student photo is available for a user in the domain, in the user's
   # directory (in /userfiles/internal/studentphoto.jpg).
   # Uses localstudentphoto:fetch() to ensure there is an up to date copy of
   # the student's photo.   
   
   sub photo_check_handler {
       my ($cmd, $tail, $client)   = @_;
       my $userinput               = "$cmd:$tail";
       my ($udom,$uname,$pid) = split(/:/,$tail);
       $udom = &unescape($udom);
       $uname = &unescape($uname);
       $pid = &unescape($pid);
       my $path=&propath($udom,$uname).'/userfiles/internal/';
       if (!-e $path) {
           &mkpath($path);
       }
       my $response;
       my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
       $result .= ':'.$response;
       &Reply($client, &escape($result)."\n",$userinput);
       return 1;
   }
   &register_handler("autophotocheck",\&photo_check_handler,0,1,0);
   
   #
   # Retrieve information from localenroll about whether to provide a button     
   # for users who have enbled import of student photos to initiate an 
   # update of photo files for registered students. Also include 
   # comment to display alongside button.  
   
   sub photo_choice_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput             = "$cmd:$tail";
       my $cdom                  = &unescape($tail);
       my ($update,$comment);
       eval {
    local($SIG{__DIE__})='DEFAULT';
    ($update,$comment)    = &localenroll::manager_photo_update($cdom);
       };
       if (!$@) {
    &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
       } else {
    &Failure($client,"unknown_cmd\n",$userinput);
       }
       return 1;
   }
   &register_handler("autophotochoice",\&photo_choice_handler,0,1,0);
   
 #  #
 # Gets a student's photo to exist (in the correct image type) in the user's   # Gets a student's photo to exist (in the correct image type) in the user's 
 # directory.  # directory.
Line 3918  sub get_institutional_code_format_handle Line 4786  sub get_institutional_code_format_handle
 #    $client  - The socket open on the client.  #    $client  - The socket open on the client.
 # Returns:  # Returns:
 #    1 - continue processing.  #    1 - continue processing.
   
 sub student_photo_handler {  sub student_photo_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
     my ($domain,$uname,$type) = split(/:/, $tail);      my ($domain,$uname,$ext,$type) = split(/:/, $tail);
   
     my $path=&propath($domain,$uname).      my $path=&propath($domain,$uname). '/userfiles/internal/';
  '/userfiles/internal/studentphoto.'.$type;      my $filename = 'studentphoto.'.$ext;
     if (-e $path) {      if ($type eq 'thumbnail') {
           $filename = 'studentphoto_tn.'.$ext;
       }
       if (-e $path.$filename) {
  &Reply($client,"ok\n","$cmd:$tail");   &Reply($client,"ok\n","$cmd:$tail");
  return 1;   return 1;
     }      }
     &mkpath($path);      &mkpath($path);
     my $file=&localstudentphoto::fetch($domain,$uname);      my $file;
       if ($type eq 'thumbnail') {
    eval {
       local($SIG{__DIE__})='DEFAULT';
       $file=&localstudentphoto::fetch_thumbnail($domain,$uname);
    };
       } else {
           $file=&localstudentphoto::fetch($domain,$uname);
       }
     if (!$file) {      if (!$file) {
  &Failure($client,"unavailable\n","$cmd:$tail");   &Failure($client,"unavailable\n","$cmd:$tail");
  return 1;   return 1;
     }      }
     if (!-e $path) { &convert_photo($file,$path); }      if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
     if (-e $path) {      if (-e $path.$filename) {
  &Reply($client,"ok\n","$cmd:$tail");   &Reply($client,"ok\n","$cmd:$tail");
  return 1;   return 1;
     }      }
Line 3944  sub student_photo_handler { Line 4824  sub student_photo_handler {
 }  }
 &register_handler("studentphoto", \&student_photo_handler, 0, 1, 0);  &register_handler("studentphoto", \&student_photo_handler, 0, 1, 0);
   
   sub inst_usertypes_handler {
       my ($cmd, $domain, $client) = @_;
       my $res;
       my $userinput = $cmd.":".$domain; # For logging purposes.
       my (%typeshash,@order,$result);
       eval {
    local($SIG{__DIE__})='DEFAULT';
    $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order);
       };
       if ($result eq 'ok') {
           if (keys(%typeshash) > 0) {
               foreach my $key (keys(%typeshash)) {
                   $res.=&escape($key).'='.&escape($typeshash{$key}).'&';
               }
           }
           $res=~s/\&$//;
           $res .= ':';
           if (@order > 0) {
               foreach my $item (@order) {
                   $res .= &escape($item).'&';
               }
           }
           $res=~s/\&$//;
       }
       &Reply($client, "$res\n", $userinput);
       return 1;
   }
   &register_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0);
   
 # mkpath makes all directories for a file, expects an absolute path with a  # mkpath makes all directories for a file, expects an absolute path with a
 # file or a trailing / if just a dir is passed  # file or a trailing / if just a dir is passed
 # returns 1 on success 0 on failure  # returns 1 on success 0 on failure
Line 3996  sub process_request { Line 4905  sub process_request {
                                 # fix all the userinput -> user_input.                                  # fix all the userinput -> user_input.
     my $wasenc    = 0; # True if request was encrypted.      my $wasenc    = 0; # True if request was encrypted.
 # ------------------------------------------------------------ See if encrypted  # ------------------------------------------------------------ See if encrypted
       # for command
       # sethost:<server>
       # <command>:<args>
       #   we just send it to the processor
       # for
       # sethost:<server>:<command>:<args>
       #  we do the implict set host and then do the command
       if ($userinput =~ /^sethost:/) {
    (my $cmd,my $newid,$userinput) = split(':',$userinput,3);
    if (defined($userinput)) {
       &sethost("$cmd:$newid");
    } else {
       $userinput = "$cmd:$newid";
    }
       }
   
     if ($userinput =~ /^enc/) {      if ($userinput =~ /^enc/) {
  $userinput = decipher($userinput);   $userinput = decipher($userinput);
  $wasenc=1;   $wasenc=1;
Line 4191  sub catchexception { Line 5116  sub catchexception {
     $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 ".$perlvar{'lonHostID'}." died through "
      ."a crash with this error msg->[$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"; }
Line 4302  sub HUPSMAN {                      # sig Line 5227  sub HUPSMAN {                      # sig
 }  }
   
 #  #
 #    Kill off hashes that describe the host table prior to re-reading it.  
 #    Hashes affected are:  
 #       %hostid, %hostdom %hostip %hostdns.  
 #  
 sub KillHostHashes {  
     foreach my $key (keys %hostid) {  
  delete $hostid{$key};  
     }  
     foreach my $key (keys %hostdom) {  
  delete $hostdom{$key};  
     }  
     foreach my $key (keys %hostip) {  
  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:  
 #  
 #    - %hostid  -  Indexed by IP, the loncapa hostname.  
 #    - %hostdom -  Indexed by  loncapa hostname, the domain.  
 #    - %hostip  -  Indexed by hostid, the Ip address of the host.  
 sub ReadHostTable {  
   
     open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";  
     my $myloncapaname = $perlvar{'lonHostID'};  
     Debug("My loncapa name is : $myloncapaname");  
     while (my $configline=<CONFIG>) {  
  if ($configline !~ /^\s*\#/ && $configline !~ /^\s*$/ ) {  
     my ($id,$domain,$role,$name)=split(/:/,$configline);  
     $name=~s/\s//g;  
     my $ip = gethostbyname($name);  
     if (length($ip) ne 4) {  
  &logthis("Skipping host $id name $name no IP $ip found\n");  
  next;  
     }  
     $ip=inet_ntoa($ip);  
     $hostid{$ip}=$id;         # LonCAPA name of host by IP.  
     $hostdom{$id}=$domain;    # LonCAPA domain name of host.   
     $hostip{$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);  
 }  
 #  
 #  Reload the Apache daemon's state.  #  Reload the Apache daemon's state.
 #  This is done by invoking /home/httpd/perl/apachereload  #  This is done by invoking /home/httpd/perl/apachereload
 #  a setuid perl script that can be root for us to do this job.  #  a setuid perl script that can be root for us to do this job.
Line 4385  sub UpdateHosts { Line 5257  sub UpdateHosts {
     #  either dropped or changed hosts.  Note that the re-read of the table      #  either dropped or changed hosts.  Note that the re-read of the table
     #  will take care of new and changed hosts as connections come into being.      #  will take care of new and changed hosts as connections come into being.
   
       &Apache::lonnet::reset_hosts_info();
   
     KillHostHashes;      foreach my $child (keys(%children)) {
     ReadHostTable;  
   
     foreach my $child (keys %children) {  
  my $childip = $children{$child};   my $childip = $children{$child};
  if(!$hostid{$childip}) {   if ($childip ne '127.0.0.1'
       && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) {
     logthis('<font color="blue"> UpdateHosts killing child '      logthis('<font color="blue"> UpdateHosts killing child '
     ." $child for ip $childip </font>");      ." $child for ip $childip </font>");
     kill('INT', $child);      kill('INT', $child);
Line 4480  sub Reply { Line 5351  sub Reply {
     Debug("Request was $request  Reply was $reply");      Debug("Request was $request  Reply was $reply");
   
     $Transactions++;      $Transactions++;
   
   
 }  }
   
   
Line 4553  sub status { Line 5422  sub status {
     $0='lond: '.$what.' '.$local;      $0='lond: '.$what.' '.$local;
 }  }
   
 # -------------------------------------------------------- Escape Special Chars  
   
 sub escape {  
     my $str=shift;  
     $str =~ s/(\W)/"%".unpack('H2',$1)/eg;  
     return $str;  
 }  
   
 # ----------------------------------------------------- Un-Escape Special Chars  
   
 sub unescape {  
     my $str=shift;  
     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;  
     return $str;  
 }  
   
 # ----------------------------------------------------------- Send USR1 to lonc  
   
 sub reconlonc {  
     my $peerfile=shift;  
     &logthis("Trying to reconnect for $peerfile");  
     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";  
     if (my $fh=IO::File->new("$loncfile")) {  
  my $loncpid=<$fh>;  
         chomp($loncpid);  
         if (kill 0 => $loncpid) {  
     &logthis("lonc at pid $loncpid responding, sending USR1");  
             kill USR1 => $loncpid;  
         } else {  
     &logthis(  
               "<font color='red'>CRITICAL: "  
              ."lonc at pid $loncpid not responding, giving up</font>");  
         }  
     } else {  
       &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');  
     }  
 }  
   
 # -------------------------------------------------- Non-critical communication  
   
 sub subreply {  
     my ($cmd,$server)=@_;  
     my $peerfile="$perlvar{'lonSockDir'}/$server";  
     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",  
                                       Type    => SOCK_STREAM,  
                                       Timeout => 10)  
        or return "con_lost";  
     print $sclient "$cmd\n";  
     my $answer=<$sclient>;  
     chomp($answer);  
     if (!$answer) { $answer="con_lost"; }  
     return $answer;  
 }  
   
 sub reply {  
   my ($cmd,$server)=@_;  
   my $answer;  
   if ($server ne $currenthostid) {   
     $answer=subreply($cmd,$server);  
     if ($answer eq 'con_lost') {  
  $answer=subreply("ping",$server);  
         if ($answer ne $server) {  
     &logthis("sub reply: answer != server answer is $answer, server is $server");  
            &reconlonc("$perlvar{'lonSockDir'}/$server");  
         }  
         $answer=subreply($cmd,$server);  
     }  
   } else {  
     $answer='self_reply';  
   }   
   return $answer;  
 }  
   
 # -------------------------------------------------------------- Talk to lonsql  # -------------------------------------------------------------- Talk to lonsql
   
 sub sql_reply {  sub sql_reply {
Line 4643  sub sub_sql_reply { Line 5439  sub sub_sql_reply {
                                       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:$currentdomainid\n";
     my $answer=<$sclient>;      my $answer=<$sclient>;
     chomp($answer);      chomp($answer);
     if (!$answer) { $answer="con_lost"; }      if (!$answer) { $answer="con_lost"; }
     return $answer;      return $answer;
 }  }
   
 # -------------------------------------------- Return path to profile directory  
   
 sub propath {  
     my ($udom,$uname)=@_;  
     $udom=~s/\W//g;  
     $uname=~s/\W//g;  
     my $subdir=$uname.'__';  
     $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;  
     my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";  
     return $proname;  
 }   
   
 # --------------------------------------- Is this the home server of an author?  # --------------------------------------- Is this the home server of an author?
   
 sub ishome {  sub ishome {
Line 4706  $SIG{USR1} = \&checkchildren; Line 5490  $SIG{USR1} = \&checkchildren;
 $SIG{USR2} = \&UpdateHosts;  $SIG{USR2} = \&UpdateHosts;
   
 #  Read the host hashes:  #  Read the host hashes:
   &Apache::lonnet::load_hosts_tab();
   
 ReadHostTable;  my $dist=`$perlvar{'lonDaemons'}/distprobe`;
   
 # --------------------------------------------------------------  # --------------------------------------------------------------
 #   Accept connections.  When a connection comes in, it is validated  #   Accept connections.  When a connection comes in, it is validated
Line 4784  sub make_new_child { Line 5569  sub make_new_child {
 #        my $tmpsnum=0;            # Now global  #        my $tmpsnum=0;            # Now global
 #---------------------------------------------------- kerberos 5 initialization  #---------------------------------------------------- kerberos 5 initialization
         &Authen::Krb5::init_context();          &Authen::Krb5::init_context();
         &Authen::Krb5::init_ets();   unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||  
    ($dist eq 'fedora6') || ($dist eq 'suse9.3')) {
       &Authen::Krb5::init_ets();
    }
   
  &status('Accepted connection');   &status('Accepted connection');
 # =============================================================================  # =============================================================================
Line 4792  sub make_new_child { Line 5580  sub make_new_child {
 # -----------------------------------------------------------------------------  # -----------------------------------------------------------------------------
  # see if we know client and 'check' for spoof IP by ineffective challenge   # see if we know client and 'check' for spoof IP by ineffective challenge
   
  ReadManagerTable; # May also be a manager!!  
   
  my $outsideip=$clientip;   my $outsideip=$clientip;
  if ($clientip eq '127.0.0.1') {   if ($clientip eq '127.0.0.1') {
     $outsideip=$hostip{$perlvar{'lonHostID'}};      $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
  }   }
   
  my $clientrec=($hostid{$outsideip}     ne undef);   my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
  my $ismanager=($managers{$outsideip}    ne undef);   my $ismanager=($managers{$outsideip}    ne undef);
  $clientname  = "[unknonwn]";   $clientname  = "[unknonwn]";
  if($clientrec) { # Establish client type.   if($clientrec) { # Establish client type.
     $ConnectionType = "client";      $ConnectionType = "client";
     $clientname = $hostid{$outsideip};      $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
     if($ismanager) {      if($ismanager) {
  $ConnectionType = "both";   $ConnectionType = "both";
     }      }
Line 4823  sub make_new_child { Line 5609  sub make_new_child {
     my $remotereq=<$client>;      my $remotereq=<$client>;
     chomp($remotereq);      chomp($remotereq);
     Debug("Got init: $remotereq");      Debug("Got init: $remotereq");
     my $inikeyword = split(/:/, $remotereq);  
     if ($remotereq =~ /^init/) {      if ($remotereq =~ /^init/) {
  &sethost("sethost:$perlvar{'lonHostID'}");   &sethost("sethost:$perlvar{'lonHostID'}");
  #   #
Line 4911  sub make_new_child { Line 5697  sub make_new_child {
     
  if ($clientok) {   if ($clientok) {
 # ---------------- New known client connecting, could mean machine online again  # ---------------- New known client connecting, could mean machine online again
           if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip 
     foreach my $id (keys(%hostip)) {   && $clientip ne '127.0.0.1') {
  if ($hostip{$id} ne $clientip ||   &Apache::lonnet::reconlonc($clientname);
     $hostip{$currenthostid} eq $clientip) {  
     # no need to try to do recon's to myself  
     next;  
  }  
  &reconlonc("$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);
Line 4974  sub is_author { Line 5755  sub is_author {
   
     #  Author role should show up as a key /domain/_au      #  Author role should show up as a key /domain/_au
   
     my $key   = "/$domain/_au";      my $key    = "/$domain/_au";
     my $value = $hashref->{$key};      my $value;
       if (defined($hashref)) {
    $value = $hashref->{$key};
       }
   
     if(defined($value)) {      if(defined($value)) {
  &Debug("$user @ $domain is an author");   &Debug("$user @ $domain is an author");
Line 4994  sub is_author { Line 5778  sub is_author {
 #    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 manage_permissions  sub manage_permissions {
 {  
   
   
     my ($request, $domain, $user, $authtype) = @_;      my ($request, $domain, $user, $authtype) = @_;
   
     &Debug("manage_permissions: $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
     if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...      if($request =~ /^(\/\Q$domain\E\/_au)$/) { # 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");
Line 5195  sub validate_user { Line 5976  sub validate_user {
  my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;   my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
  my $krbserver  = &Authen::Krb5::parse_name($krbservice);   my $krbserver  = &Authen::Krb5::parse_name($krbservice);
  my $credentials= &Authen::Krb5::cc_default();   my $credentials= &Authen::Krb5::cc_default();
  $credentials->initialize($krbclient);   $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
                                                                    .$contentpwd));
  my $krbreturn  = &Authen::Krb5::get_in_tkt_with_password($krbclient,   my $krbreturn  = &Authen::Krb5::get_in_tkt_with_password($krbclient,
  $krbserver,   $krbserver,
  $password,   $password,
  $credentials);   $credentials);
  $validated = ($krbreturn == 1);   $validated = ($krbreturn == 1);
    if (!$validated) {
       &logthis('krb5: '.$user.', '.$contentpwd.', '.
        &Authen::Krb5::error());
    }
     } else {      } else {
  $validated = 0;   $validated = 0;
     }      }
Line 5208  sub validate_user { Line 5994  sub validate_user {
     #  Authenticate via installation specific authentcation method:      #  Authenticate via installation specific authentcation method:
     $validated = &localauth::localauth($user,       $validated = &localauth::localauth($user, 
        $password,          $password, 
        $contentpwd);         $contentpwd,
          $domain);
       if ($validated < 0) {
    &logthis("localauth for $contentpwd $user:$domain returned a $validated");
    $validated = 0;
       }
  } else { # Unrecognized auth is also bad.   } else { # Unrecognized auth is also bad.
     $validated = 0;      $validated = 0;
  }   }
Line 5234  sub addline { Line 6025  sub addline {
     my ($fname,$hostid,$ip,$newline)=@_;      my ($fname,$hostid,$ip,$newline)=@_;
     my $contents;      my $contents;
     my $found=0;      my $found=0;
     my $expr='^'.$hostid.':'.$ip.':';      my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':';
     $expr =~ s/\./\\\./g;  
     my $sh;      my $sh;
     if ($sh=IO::File->new("$fname.subscription")) {      if ($sh=IO::File->new("$fname.subscription")) {
  while (my $subline=<$sh>) {   while (my $subline=<$sh>) {
Line 5251  sub addline { Line 6041  sub addline {
 }  }
   
 sub get_chat {  sub get_chat {
     my ($cdom,$cname,$udom,$uname)=@_;      my ($cdom,$cname,$udom,$uname,$group)=@_;
     my %hash;  
     my $proname=&propath($cdom,$cname);  
     my @entries=();      my @entries=();
     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",      my $namespace = 'nohist_chatroom';
     &GDBM_READER(),0640)) {      my $namespace_inroom = 'nohist_inchatroom';
  @entries=map { $_.':'.$hash{$_} } sort keys %hash;      if ($group ne '') {
  untie %hash;          $namespace .= '_'.$group;
           $namespace_inroom .= '_'.$group;
       }
       my $hashref = &tie_user_hash($cdom, $cname, $namespace,
    &GDBM_READER());
       if ($hashref) {
    @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
    &untie_user_hash($hashref);
     }      }
     my @participants=();      my @participants=();
     my $cutoff=time-60;      my $cutoff=time-60;
     if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",      $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
     &GDBM_WRCREAT(),0640)) {        &GDBM_WRCREAT());
         $hash{$uname.':'.$udom}=time;      if ($hashref) {
         foreach (sort keys %hash) {          $hashref->{$uname.':'.$udom}=time;
     if ($hash{$_}>$cutoff) {          foreach my $user (sort(keys(%$hashref))) {
  $participants[$#participants+1]='active_participant:'.$_;      if ($hashref->{$user}>$cutoff) {
    push(@participants, 'active_participant:'.$user);
             }              }
         }          }
         untie %hash;          &untie_user_hash($hashref);
     }      }
     return (@participants,@entries);      return (@participants,@entries);
 }  }
   
 sub chat_add {  sub chat_add {
     my ($cdom,$cname,$newchat)=@_;      my ($cdom,$cname,$newchat,$group)=@_;
     my %hash;  
     my $proname=&propath($cdom,$cname);  
     my @entries=();      my @entries=();
     my $time=time;      my $time=time;
     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",      my $namespace = 'nohist_chatroom';
     &GDBM_WRCREAT(),0640)) {      my $logfile = 'chatroom.log';
  @entries=map { $_.':'.$hash{$_} } sort keys %hash;      if ($group ne '') {
           $namespace .= '_'.$group;
           $logfile = 'chatroom_'.$group.'.log';
       }
       my $hashref = &tie_user_hash($cdom, $cname, $namespace,
    &GDBM_WRCREAT());
       if ($hashref) {
    @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
  my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);   my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
  my ($thentime,$idnum)=split(/\_/,$lastid);   my ($thentime,$idnum)=split(/\_/,$lastid);
  my $newid=$time.'_000000';   my $newid=$time.'_000000';
Line 5293  sub chat_add { Line 6095  sub chat_add {
     $idnum=substr('000000'.$idnum,-6,6);      $idnum=substr('000000'.$idnum,-6,6);
     $newid=$time.'_'.$idnum;      $newid=$time.'_'.$idnum;
  }   }
  $hash{$newid}=$newchat;   $hashref->{$newid}=$newchat;
  my $expired=$time-3600;   my $expired=$time-3600;
  foreach (keys %hash) {   foreach my $comment (keys(%$hashref)) {
     my ($thistime)=($_=~/(\d+)\_/);      my ($thistime) = ($comment=~/(\d+)\_/);
     if ($thistime<$expired) {      if ($thistime<$expired) {
  delete $hash{$_};   delete $hashref->{$comment};
     }      }
  }   }
  untie %hash;   {
     }      my $proname=&propath($cdom,$cname);
     {      if (open(CHATLOG,">>$proname/$logfile")) { 
  my $hfh;   print CHATLOG ("$time:".&unescape($newchat)."\n");
  if ($hfh=IO::File->new(">>$proname/chatroom.log")) {       }
     print $hfh "$time:".&unescape($newchat)."\n";      close(CHATLOG);
  }   }
    &untie_user_hash($hashref);
     }      }
 }  }
   
Line 5396  sub thisversion { Line 6199  sub thisversion {
 sub subscribe {  sub subscribe {
     my ($userinput,$clientip)=@_;      my ($userinput,$clientip)=@_;
     my $result;      my $result;
     my ($cmd,$fname)=split(/:/,$userinput);      my ($cmd,$fname)=split(/:/,$userinput,2);
     my $ownership=&ishome($fname);      my $ownership=&ishome($fname);
     if ($ownership eq 'owner') {      if ($ownership eq 'owner') {
 # explitly asking for the current version?  # explitly asking for the current version?
Line 5429  sub subscribe { Line 6232  sub subscribe {
                 # the metadata                  # the metadata
  unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }   unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
  $fname=~s/\/home\/httpd\/html\/res/raw/;   $fname=~s/\/home\/httpd\/html\/res/raw/;
  $fname="http://$thisserver/".$fname;   $fname="http://".&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
  $result="$fname\n";   $result="$fname\n";
     }      }
  } else {   } else {
Line 5440  sub subscribe { Line 6243  sub subscribe {
     }      }
     return $result;      return $result;
 }  }
   #  Change the passwd of a unix user.  The caller must have
   #  first verified that the user is a loncapa user.
   #
   # Parameters:
   #    user      - Unix user name to change.
   #    pass      - New password for the user.
   # Returns:
   #    ok    - if success
   #    other - Some meaningfule error message string.
   # NOTE:
   #    invokes a setuid script to change the passwd.
   sub change_unix_password {
       my ($user, $pass) = @_;
   
       &Debug("change_unix_password");
       my $execdir=$perlvar{'lonDaemons'};
       &Debug("Opening lcpasswd pipeline");
       my $pf = IO::File->new("|$execdir/lcpasswd > "
      ."$perlvar{'lonDaemons'}"
      ."/logs/lcpasswd.log");
       print $pf "$user\n$pass\n$pass\n";
       close $pf;
       my $err = $?;
       return ($err < @passwderrors) ? $passwderrors[$err] : 
    "pwchange_falure - unknown error";
   
       
   }
   
   
 sub make_passwd_file {  sub make_passwd_file {
     my ($uname, $umode,$npass,$passfilename)=@_;      my ($uname, $umode,$npass,$passfilename)=@_;
Line 5499  sub make_passwd_file { Line 6331  sub make_passwd_file {
  print $se "$npass\n";   print $se "$npass\n";
  print $se "$lc_error_file\n"; # Status -> unique file.   print $se "$lc_error_file\n"; # Status -> unique file.
     }      }
     my $error = IO::File->new("< $lc_error_file");      if (-r $lc_error_file) {
     my $useraddok = <$error>;   &Debug("Opening error file: $lc_error_file");
     $error->close;   my $error = IO::File->new("< $lc_error_file");
     unlink($lc_error_file);   my $useraddok = <$error>;
    $error->close;
     chomp $useraddok;   unlink($lc_error_file);
   
     if($useraddok > 0) {   chomp $useraddok;
  my $error_text = &lcuseraddstrerror($useraddok);  
  &logthis("Failed lcuseradd: $error_text");   if($useraddok > 0) {
  $result = "lcuseradd_failed:$error_text\n";      my $error_text = &lcuseraddstrerror($useraddok);
     }  else {      &logthis("Failed lcuseradd: $error_text");
  my $pf = IO::File->new(">$passfilename");      $result = "lcuseradd_failed:$error_text\n";
  if($pf) {   }  else {
     print $pf "unix:\n";      my $pf = IO::File->new(">$passfilename");
  } else {      if($pf) {
     $result = "pass_file_failed_error";   print $pf "unix:\n";
       } else {
    $result = "pass_file_failed_error";
       }
  }   }
       }  else {
    &Debug("Could not locate lcuseradd error: $lc_error_file");
    $result="bug_lcuseradd_no_output_file";
     }      }
  }   }
     } elsif ($umode eq 'none') {      } elsif ($umode eq 'none') {
Line 5542  sub convert_photo { Line 6380  sub convert_photo {
 sub sethost {  sub sethost {
     my ($remotereq) = @_;      my ($remotereq) = @_;
     my (undef,$hostid)=split(/:/,$remotereq);      my (undef,$hostid)=split(/:/,$remotereq);
       # ignore sethost if we are already correct
       if ($hostid eq $currenthostid) {
    return 'ok';
       }
   
     if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }      if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
     if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {      if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'}) 
    eq &Apache::lonnet::get_host_ip($hostid)) {
  $currenthostid  =$hostid;   $currenthostid  =$hostid;
  $currentdomainid=$hostdom{$hostid};   $currentdomainid=&Apache::lonnet::host_domain($hostid);
  &logthis("Setting hostid to $hostid, and domain to $currentdomainid");   &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
     } else {      } else {
  &logthis("Requested host id $hostid not an alias of ".   &logthis("Requested host id $hostid not an alias of ".
Line 5561  sub version { Line 6405  sub version {
     return "version:$VERSION";      return "version:$VERSION";
 }  }
   
 #There is a copy of this in lonnet.pm  
 sub userload {  
     my $numusers=0;  
     {  
  opendir(LONIDS,$perlvar{'lonIDsDir'});  
  my $filename;  
  my $curtime=time;  
  while ($filename=readdir(LONIDS)) {  
     if ($filename eq '.' || $filename eq '..') {next;}  
     my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];  
     if ($curtime-$mtime < 1800) { $numusers++; }  
  }  
  closedir(LONIDS);  
     }  
     my $userloadpercent=0;  
     my $maxuserload=$perlvar{'lonUserLoadLim'};  
     if ($maxuserload) {  
  $userloadpercent=100*$numusers/$maxuserload;  
     }  
     $userloadpercent=sprintf("%.2f",$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)
   
Line 5967  to the client, and the connection is clo Line 6721  to the client, and the connection is clo
 IO::Socket  IO::Socket
 IO::File  IO::File
 Apache::File  Apache::File
 Symbol  
 POSIX  POSIX
 Crypt::IDEA  Crypt::IDEA
 LWP::UserAgent()  LWP::UserAgent()
Removed from v.1.282  
changed lines
  Added in v.1.386

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