--- loncom/lond 2000/12/05 19:14:59 1.26
+++ loncom/lond 2004/03/08 20:13:07 1.165.2.3
@@ -1,78 +1,553 @@
#!/usr/bin/perl
# The LearningOnline Network
# lond "LON Daemon" Server (port "LOND" 5663)
-# 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
-# 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
-# 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
-# 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
-# 03/07,05/31 Gerd Kortemeyer
-# 06/26 Scott Harrison
-# 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
-# 12/05 Scott Harrison
-# 12/05 Gerd Kortemeyer
-#
-# based on "Perl Cookbook" ISBN 1-56592-243-3
-# preforker - server who forks first
-# runs as a daemon
-# HUPs
-# uses IDEA encryption
+#
+# $Id: lond,v 1.165.2.3 2004/03/08 20:13:07 albertel Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+
+
+# http://www.lon-capa.org/
+#
+
+use strict;
+use lib '/home/httpd/lib/perl/';
+use LONCAPA::Configuration;
use IO::Socket;
use IO::File;
-use Apache::File;
+#use Apache::File;
use Symbol;
use POSIX;
use Crypt::IDEA;
use LWP::UserAgent();
use GDBM_File;
use Authen::Krb4;
+use Authen::Krb5;
+use lib '/home/httpd/lib/perl/';
+use localauth;
+use File::Copy;
+
+my $DEBUG = 0; # Non zero to enable debug log entries.
+
+my $status='';
+my $lastlog='';
+
+my $VERSION='$Revision: 1.165.2.3 $'; #' stupid emacs
+my $remoteVERSION;
+my $currenthostid;
+my $currentdomainid;
+
+my $client;
+my $clientip;
+my $clientname;
+
+my $server;
+my $thisserver;
+
+#
+# Connection type is:
+# client - All client actions are allowed
+# manager - only management functions allowed.
+# both - Both management and client actions are allowed
+#
-# grabs exception and records it to log before exiting
-sub catchexception {
- my ($signal)=@_;
- $SIG{'QUIT'}='DEFAULT';
- $SIG{__DIE__}='DEFAULT';
- &logthis("CRITICAL: "
- ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
- ."$signal with this parameter->[$@]");
- if ($client) { print $client "error: $@\n"; }
- die($@);
+my $ConnectionType;
+
+my %hostid;
+my %hostdom;
+my %hostip;
+
+my %managers; # Ip -> manager names
+
+my %perlvar; # Will have the apache conf defined perl vars.
+
+#
+# The array below are password error strings."
+#
+my $lastpwderror = 13; # Largest error number from lcpasswd.
+my @passwderrors = ("ok",
+ "lcpasswd must be run as user 'www'",
+ "lcpasswd got incorrect number of arguments",
+ "lcpasswd did not get the right nubmer of input text lines",
+ "lcpasswd too many simultaneous pwd changes in progress",
+ "lcpasswd User does not exist.",
+ "lcpasswd Incorrect current passwd",
+ "lcpasswd Unable to su to root.",
+ "lcpasswd Cannot set new passwd.",
+ "lcpasswd Username has invalid characters",
+ "lcpasswd Invalid characters in password",
+ "11", "12",
+ "lcpasswd Password mismatch");
+
+
+# The array below are lcuseradd error strings.:
+
+my $lastadderror = 13;
+my @adderrors = ("ok",
+ "User ID mismatch, lcuseradd must run as user www",
+ "lcuseradd Incorrect number of command line parameters must be 3",
+ "lcuseradd Incorrect number of stdinput lines, must be 3",
+ "lcuseradd Too many other simultaneous pwd changes in progress",
+ "lcuseradd User does not exist",
+ "lcuseradd Unable to make www member of users's group",
+ "lcuseradd Unable to su to root",
+ "lcuseradd Unable to set password",
+ "lcuseradd Usrname has invalid characters",
+ "lcuseradd Password has an invalid character",
+ "lcuseradd User already exists",
+ "lcuseradd Could not add user.",
+ "lcuseradd Password mismatch");
+
+
+#
+# GetCertificate: Given a transaction that requires a certificate,
+# this function will extract the certificate from the transaction
+# request. Note that at this point, the only concept of a certificate
+# is the hostname to which we are connected.
+#
+# Parameter:
+# request - The request sent by our client (this parameterization may
+# need to change when we really use a certificate granting
+# authority.
+#
+sub GetCertificate {
+ my $request = shift;
+
+ return $clientip;
}
-# grabs exception and records it to log before exiting
-# NOTE: we must NOT use the regular (non-overrided) die function in
-# the code because a handler CANNOT be attached to it
-# (despite what some of the documentation says about SIG{__DIE__}.
+#
+# Return true if client is a manager.
+#
+sub isManager {
+ return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
+}
+#
+# Return tru if client can do client functions
+#
+sub isClient {
+ return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
+}
+
+
+#
+# ReadManagerTable: Reads in the current manager table. For now this is
+# done on each manager authentication because:
+# - These authentications are not frequent
+# - This allows dynamic changes to the manager table
+# without the need to signal to the lond.
+#
+
+sub ReadManagerTable {
+
+ # Clean out the old table first..
+
+ foreach my $key (keys %managers) {
+ delete $managers{$key};
+ }
+
+ my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
+ if (!open (MANAGERS, $tablename)) {
+ logthis('No manager table. Nobody can manage!!');
+ return;
+ }
+ while(my $host = ) {
+ chomp($host);
+ if (!defined $hostip{$host}) { # This is a non cluster member
+
+ # The entry is of the form:
+ # cluname:hostname
+ # cluname - A 'cluster hostname' is needed in order to negotiate
+ # the host key.
+ # hostname- The dns name of the host.
+ #
+
+ my($cluname, $dnsname) = split(/:/, $host);
+ open(MGRPIPE, "/usr/bin/host $dnsname |") || die "Can't make host pipeline";
+ my $dnsinfo = ;
+ chomp $dnsinfo;
+ close MGRPIPE;
+ my($jname, $jhas, $jaddress, $hostip) = split(/ /, $dnsinfo);
+ $managers{$hostip} = $cluname;
+ } else {
+ $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
+ }
+ }
+}
+
+#
+# ValidManager: Determines if a given certificate represents a valid manager.
+# in this primitive implementation, the 'certificate' is
+# just the connecting loncapa client name. This is checked
+# against a valid client list in the configuration.
+#
+#
+sub ValidManager {
+ my $certificate = shift;
-sub catchdie {
- my ($message)=@_;
+ return isManager;
+}
+#
+# CopyFile: Called as part of the process of installing a
+# new configuration file. This function copies an existing
+# file to a backup file.
+# Parameters:
+# oldfile - Name of the file to backup.
+# newfile - Name of the backup file.
+# Return:
+# 0 - Failure (errno has failure reason).
+# 1 - Success.
+#
+sub CopyFile {
+ my $oldfile = shift;
+ my $newfile = shift;
+
+ # The file must exist:
+
+ if(-e $oldfile) {
+
+ # Read the old file.
+
+ my $oldfh = IO::File->new("< $oldfile");
+ if(!$oldfh) {
+ return 0;
+ }
+ my @contents = <$oldfh>; # Suck in the entire file.
+
+ # write the backup file:
+
+ my $newfh = IO::File->new("> $newfile");
+ if(!(defined $newfh)){
+ return 0;
+ }
+ my $lines = scalar @contents;
+ for (my $i =0; $i < $lines; $i++) {
+ print $newfh ($contents[$i]);
+ }
+
+ $oldfh->close;
+ $newfh->close;
+
+ chmod(0660, $newfile);
+
+ return 1;
+
+ } else {
+ return 0;
+ }
+}
+#
+# Host files are passed out with externally visible host IPs.
+# If, for example, we are behind a fire-wall or NAT host, our
+# internally visible IP may be different than the externally
+# visible IP. Therefore, we always adjust the contents of the
+# host file so that the entry for ME is the IP that we believe
+# we have. At present, this is defined as the entry that
+# DNS has for us. If by some chance we are not able to get a
+# DNS translation for us, then we assume that the host.tab file
+# is correct.
+# BUGBUGBUG - in the future, we really should see if we can
+# easily query the interface(s) instead.
+# Parameter(s):
+# contents - The contents of the host.tab to check.
+# Returns:
+# newcontents - The adjusted contents.
+#
+#
+sub AdjustHostContents {
+ my $contents = shift;
+ my $adjusted;
+ my $me = $perlvar{'lonHostID'};
+
+ foreach my $line (split(/\n/,$contents)) {
+ if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
+ chomp($line);
+ my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
+ if ($id eq $me) {
+ open(PIPE, " /usr/bin/host $name |") || die "Cant' make host pipeline";
+ my $hostinfo = ;
+ close PIPE;
+
+ my ($hostname, $has, $address, $ipnew) = split(/ /,$hostinfo);
+ &logthis(''.
+ "hostname = $hostname me = $me, name = $name actual ip = $ipnew ");
+
+ if ($hostname eq $name) { # Lookup succeeded..
+ &logthis(' look up ok ');
+ $ip = $ipnew;
+ } else {
+ &logthis(' Lookup failed: '
+ .$hostname." ne $name ");
+ }
+ # Reconstruct the host line and append to adjusted:
+
+ my $newline = "$id:$domain:$role:$name:$ip";
+ if($maxcon ne "") { # Not all hosts have loncnew tuning params
+ $newline .= ":$maxcon:$idleto:$mincon";
+ }
+ $adjusted .= $newline."\n";
+
+ } else { # Not me, pass unmodified.
+ $adjusted .= $line."\n";
+ }
+ } else { # Blank or comment never re-written.
+ $adjusted .= $line."\n"; # Pass blanks and comments as is.
+ }
+ }
+ return $adjusted;
+}
+#
+# InstallFile: Called to install an administrative file:
+# - The file is created with .tmp
+# - The .tmp file is then mv'd to
+# This lugubrious procedure is done to ensure that we are never without
+# a valid, even if dated, version of the file regardless of who crashes
+# and when the crash occurs.
+#
+# Parameters:
+# Name of the file
+# File Contents.
+# Return:
+# nonzero - success.
+# 0 - failure and $! has an errno.
+#
+sub InstallFile {
+ my $Filename = shift;
+ my $Contents = shift;
+ my $TempFile = $Filename.".tmp";
+
+ # Open the file for write:
+
+ my $fh = IO::File->new("> $TempFile"); # Write to temp.
+ if(!(defined $fh)) {
+ &logthis(' Unable to create '.$TempFile."");
+ return 0;
+ }
+ # write the contents of the file:
+
+ print $fh ($Contents);
+ $fh->close; # In case we ever have a filesystem w. locking
+
+ chmod(0660, $TempFile);
+
+ # Now we can move install the file in position.
+
+ move($TempFile, $Filename);
+
+ return 1;
+}
+
+#
+# PushFile: Called to do an administrative push of a file.
+# - Ensure the file being pushed is one we support.
+# - Backup the old file to
+# - Separate the contents of the new file out from the
+# rest of the request.
+# - Write the new file.
+# Parameter:
+# Request - The entire user request. This consists of a : separated
+# string pushfile:tablename:contents.
+# NOTE: The contents may have :'s in it as well making things a bit
+# more interesting... but not much.
+# Returns:
+# String to send to client ("ok" or "refused" if bad file).
+#
+sub PushFile {
+ my $request = shift;
+ my ($command, $filename, $contents) = split(":", $request, 3);
+
+ # At this point in time, pushes for only the following tables are
+ # supported:
+ # hosts.tab ($filename eq host).
+ # domain.tab ($filename eq domain).
+ # Construct the destination filename or reject the request.
+ #
+ # lonManage is supposed to ensure this, however this session could be
+ # part of some elaborate spoof that managed somehow to authenticate.
+ #
+
+ my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
+ if ($filename eq "host") {
+ $tablefile .= "hosts.tab";
+ } elsif ($filename eq "domain") {
+ $tablefile .= "domain.tab";
+ } else {
+ return "refused";
+ }
+ #
+ # >copy< the old table to the backup table
+ # don't rename in case system crashes/reboots etc. in the time
+ # window between a rename and write.
+ #
+ my $backupfile = $tablefile;
+ $backupfile =~ s/\.tab$/.old/;
+ if(!CopyFile($tablefile, $backupfile)) {
+ &logthis(' CopyFile from '.$tablefile." to ".$backupfile." failed ");
+ return "error:$!";
+ }
+ &logthis(' Pushfile: backed up '
+ .$tablefile." to $backupfile");
+
+ # If the file being pushed is the host file, we adjust the entry for ourself so that the
+ # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
+ # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
+ # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
+ # that possibilty.
+
+ if($filename eq "host") {
+ $contents = AdjustHostContents($contents);
+ }
+
+ # Install the new file:
+
+ if(!InstallFile($tablefile, $contents)) {
+ &logthis(' Pushfile: unable to install '
+ .$tablefile." $! ");
+ return "error:$!";
+ }
+ else {
+ &logthis(' Installed new '.$tablefile
+ ."");
+
+ }
+
+
+ # Indicate success:
+
+ return "ok";
+
+}
+
+#
+# Called to re-init either lonc or lond.
+#
+# Parameters:
+# request - The full request by the client. This is of the form
+# reinit:
+# where is allowed to be either of
+# lonc or lond
+#
+# Returns:
+# The string to be sent back to the client either:
+# ok - Everything worked just fine.
+# error:why - There was a failure and why describes the reason.
+#
+#
+sub ReinitProcess {
+ my $request = shift;
+
+
+ # separate the request (reinit) from the process identifier and
+ # validate it producing the name of the .pid file for the process.
+ #
+ #
+ my ($junk, $process) = split(":", $request);
+ my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
+ if($process eq 'lonc') {
+ $processpidfile = $processpidfile."lonc.pid";
+ if (!open(PIDFILE, "< $processpidfile")) {
+ return "error:Open failed for $processpidfile";
+ }
+ my $loncpid = ;
+ close(PIDFILE);
+ logthis(' Reinitializing lonc pid='.$loncpid
+ ."");
+ kill("USR2", $loncpid);
+ } elsif ($process eq 'lond') {
+ logthis(' Reinitializing self (lond) ');
+ &UpdateHosts; # Lond is us!!
+ } else {
+ &logthis('");
+ return "error:Invalid process identifier $process";
+ }
+ return 'ok';
+}
+
+#
+# Convert an error return code from lcpasswd to a string value.
+#
+sub lcpasswdstrerror {
+ my $ErrorCode = shift;
+ if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
+ return "lcpasswd Unrecognized error return value ".$ErrorCode;
+ } else {
+ return $passwderrors[$ErrorCode];
+ }
+}
+
+#
+# Convert an error return code from lcuseradd to a string value:
+#
+sub lcuseraddstrerror {
+ my $ErrorCode = shift;
+ if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
+ return "lcuseradd - Unrecognized error code: ".$ErrorCode;
+ } else {
+ return $adderrors[$ErrorCode];
+ }
+}
+
+# grabs exception and records it to log before exiting
+sub catchexception {
+ my ($error)=@_;
$SIG{'QUIT'}='DEFAULT';
$SIG{__DIE__}='DEFAULT';
+ &status("Catching exception");
&logthis("CRITICAL: "
- ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
- ."\_\_DIE\_\_ with this parameter->[$message]");
- if ($client) { print $client "error: $message\n"; }
- die($message);
+ ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
+ ."a crash with this error msg->[$error]");
+ &logthis('Famous last words: '.$status.' - '.$lastlog);
+ if ($client) { print $client "error: $error\n"; }
+ $server->close();
+ die($error);
}
+sub timeout {
+ &status("Handling Timeout");
+ &logthis("CRITICAL: TIME OUT ".$$."");
+ &catchexception('Timeout');
+}
# -------------------------------- Set signal handlers to record abnormal exits
$SIG{'QUIT'}=\&catchexception;
$SIG{__DIE__}=\&catchexception;
-# ------------------------------------ Read httpd access.conf and get variables
-
-open (CONFIG,"/etc/httpd/conf/access.conf")
- || catchdie "Can't read access.conf";
-
-while ($configline=) {
- if ($configline =~ /PerlSetVar/) {
- my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
- chomp($varvalue);
- $perlvar{$varname}=$varvalue;
- }
+# ---------------------------------- Read loncapa_apache.conf and loncapa.conf
+&status("Read loncapa.conf and loncapa_apache.conf");
+my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
+%perlvar=%{$perlvarref};
+undef $perlvarref;
+
+# ----------------------------- Make sure this process is running from user=www
+my $wwwid=getpwnam('www');
+if ($wwwid!=$<) {
+ my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
+ my $subj="LON: $currenthostid User ID mismatch";
+ system("echo 'User ID mismatch. lond must be run as user www.' |\
+ mailto $emailto -s '$subj' > /dev/null");
+ exit 1;
}
-close(CONFIG);
# --------------------------------------------- Check if other instance running
@@ -82,24 +557,12 @@ if (-e $pidfile) {
my $lfh=IO::File->new("$pidfile");
my $pide=<$lfh>;
chomp($pide);
- if (kill 0 => $pide) { catchdie "already running"; }
+ if (kill 0 => $pide) { die "already running"; }
}
-$PREFORK=4; # number of children to maintain, at least four spare
-
# ------------------------------------------------------------- Read hosts file
-open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab")
- || catchdie "Can't read host file";
-while ($configline=) {
- my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
- chomp($ip);
- $hostid{$ip}=$id;
- if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
- $PREFORK++;
-}
-close(CONFIG);
# establish SERVER socket, bind and listen.
$server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
@@ -107,43 +570,187 @@ $server = IO::Socket::INET->new(LocalPor
Proto => 'tcp',
Reuse => 1,
Listen => 10 )
- or catchdie "making socket: $@\n";
+ or die "making socket: $@\n";
# --------------------------------------------------------- Do global variables
# global variables
-$MAX_CLIENTS_PER_CHILD = 5; # number of clients each child should
- # process
-%children = (); # keys are current child process IDs
-$children = 0; # current number of children
+my %children = (); # keys are current child process IDs
sub REAPER { # takes care of dead children
$SIG{CHLD} = \&REAPER;
- my $pid = wait;
- $children --;
- &logthis("Child $pid died");
- delete $children{$pid};
+ &status("Handling child death");
+ my $pid;
+ do {
+ $pid = waitpid(-1,&WNOHANG());
+ if (defined($children{$pid})) {
+ &logthis("Child $pid died");
+ delete($children{$pid});
+ } else {
+ &logthis("Unknown Child $pid died");
+ }
+ } while ( $pid > 0 );
+ foreach my $child (keys(%children)) {
+ $pid = waitpid($child,&WNOHANG());
+ if ($pid > 0) {
+ &logthis("Child $child - $pid looks like we missed it's death");
+ delete($children{$pid});
+ }
+ }
+ &status("Finished Handling child death");
}
sub HUNTSMAN { # signal handler for SIGINT
+ &status("Killing children (INT)");
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
kill 'INT' => keys %children;
+ &logthis("Free socket: ".shutdown($server,2)); # free up socket
my $execdir=$perlvar{'lonDaemons'};
unlink("$execdir/logs/lond.pid");
&logthis("CRITICAL: Shutting down");
+ &status("Done killing children");
exit; # clean up with dignity
}
sub HUPSMAN { # signal handler for SIGHUP
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
+ &status("Killing children for restart (HUP)");
kill 'INT' => keys %children;
- close($server); # free up socket
+ &logthis("Free socket: ".shutdown($server,2)); # free up socket
&logthis("CRITICAL: Restarting");
my $execdir=$perlvar{'lonDaemons'};
+ unlink("$execdir/logs/lond.pid");
+ &status("Restarting self (HUP)");
exec("$execdir/lond"); # here we go again
}
+#
+# Kill off hashes that describe the host table prior to re-reading it.
+# Hashes affected are:
+# %hostid, %hostdom %hostip
+#
+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};
+ }
+}
+#
+# 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";
+
+ while (my $configline=) {
+ if (!($configline =~ /^\s*\#/)) {
+ my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
+ chomp($ip); $ip=~s/\D+$//;
+ $hostid{$ip}=$id;
+ $hostdom{$id}=$domain;
+ $hostip{$id}=$ip;
+ if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
+ }
+ }
+ close(CONFIG);
+}
+#
+# Reload the Apache daemon's state.
+# This is done by invoking /home/httpd/perl/apachereload
+# a setuid perl script that can be root for us to do this job.
+#
+sub ReloadApache {
+ my $execdir = $perlvar{'lonDaemons'};
+ my $script = $execdir."/apachereload";
+ system($script);
+}
+
+#
+# Called in response to a USR2 signal.
+# - Reread hosts.tab
+# - All children connected to hosts that were removed from hosts.tab
+# are killed via SIGINT
+# - All children connected to previously existing hosts are sent SIGUSR1
+# - Our internal hosts hash is updated to reflect the new contents of
+# hosts.tab causing connections from hosts added to hosts.tab to
+# now be honored.
+#
+sub UpdateHosts {
+ &status("Reload hosts.tab");
+ logthis(' Updating connections ');
+ #
+ # The %children hash has the set of IP's we currently have children
+ # on. These need to be matched against records in the hosts.tab
+ # Any ip's no longer in the table get killed off they correspond to
+ # 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.
+
+
+ KillHostHashes;
+ ReadHostTable;
+
+ foreach my $child (keys %children) {
+ my $childip = $children{$child};
+ if(!$hostid{$childip}) {
+ logthis(' UpdateHosts killing child '
+ ." $child for ip $childip ");
+ kill('INT', $child);
+ } else {
+ logthis(' keeping child for ip '
+ ." $childip (pid=$child) ");
+ }
+ }
+ ReloadApache;
+ &status("Finished reloading hosts.tab");
+}
+
+
+sub checkchildren {
+ &status("Checking on the children (sending signals)");
+ &initnewstatus();
+ &logstatus();
+ &logthis('Going to check on the children');
+ my $docdir=$perlvar{'lonDocRoot'};
+ foreach (sort keys %children) {
+ sleep 1;
+ unless (kill 'USR1' => $_) {
+ &logthis ('Child '.$_.' is dead');
+ &logstatus($$.' is dead');
+ }
+ }
+ sleep 5;
+ $SIG{ALRM} = sub { die "timeout" };
+ $SIG{__DIE__} = 'DEFAULT';
+ &status("Checking on the children (waiting for reports)");
+ foreach (sort keys %children) {
+ unless (-e "$docdir/lon-status/londchld/$_.txt") {
+ eval {
+ alarm(300);
+ &logthis('Child '.$_.' did not respond');
+ kill 9 => $_;
+ #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
+ #$subj="LON: $currenthostid killed lond process $_";
+ #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
+ #$execdir=$perlvar{'lonDaemons'};
+ #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
+ alarm(0);
+ }
+ }
+ }
+ $SIG{ALRM} = 'DEFAULT';
+ $SIG{__DIE__} = \&catchexception;
+ &status("Finished checking children");
+}
+
# --------------------------------------------------------------------- Logging
sub logthis {
@@ -152,9 +759,76 @@ sub logthis {
my $fh=IO::File->new(">>$execdir/logs/lond.log");
my $now=time;
my $local=localtime($now);
+ $lastlog=$local.': '.$message;
print $fh "$local ($$): $message\n";
}
+# ------------------------- Conditional log if $DEBUG true.
+sub Debug {
+ my $message = shift;
+ if($DEBUG) {
+ &logthis($message);
+ }
+}
+
+#
+# Sub to do replies to client.. this gives a hook for some
+# debug tracing too:
+# Parameters:
+# fd - File open on client.
+# reply - Text to send to client.
+# request - Original request from client.
+#
+sub Reply {
+ my $fd = shift;
+ my $reply = shift;
+ my $request = shift;
+
+ print $fd $reply;
+ Debug("Request was $request Reply was $reply");
+
+}
+# ------------------------------------------------------------------ Log status
+
+sub logstatus {
+ &status("Doing logging");
+ my $docdir=$perlvar{'lonDocRoot'};
+ {
+ my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
+ print $fh $$."\t".$clientname."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
+ $fh->close();
+ }
+ &status("Finished londstatus.txt");
+ {
+ my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
+ print $fh $status."\n".$lastlog."\n".time;
+ $fh->close();
+ }
+ &status("Finished logging");
+}
+
+sub initnewstatus {
+ my $docdir=$perlvar{'lonDocRoot'};
+ my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
+ my $now=time;
+ my $local=localtime($now);
+ print $fh "LOND status $local - parent $$\n\n";
+ opendir(DIR,"$docdir/lon-status/londchld");
+ while (my $filename=readdir(DIR)) {
+ unlink("$docdir/lon-status/londchld/$filename");
+ }
+ closedir(DIR);
+}
+
+# -------------------------------------------------------------- Status setting
+
+sub status {
+ my $what=shift;
+ my $now=time;
+ my $local=localtime($now);
+ $status=$local.': '.$what;
+ $0='lond: '.$what.' '.$local;
+}
# -------------------------------------------------------- Escape Special Chars
@@ -184,13 +858,6 @@ sub reconlonc {
if (kill 0 => $loncpid) {
&logthis("lonc at pid $loncpid responding, sending USR1");
kill USR1 => $loncpid;
- sleep 1;
- if (-e "$peerfile") { return; }
- &logthis("$peerfile still not there, give it another try");
- sleep 5;
- if (-e "$peerfile") { return; }
- &logthis(
- "WARNING: $peerfile still not there, giving up");
} else {
&logthis(
"CRITICAL: "
@@ -220,11 +887,12 @@ sub subreply {
sub reply {
my ($cmd,$server)=@_;
my $answer;
- if ($server ne $perlvar{'lonHostID'}) {
+ if ($server ne $currenthostid) {
$answer=subreply($cmd,$server);
if ($answer eq 'con_lost') {
$answer=subreply("ping",$server);
if ($answer ne $server) {
+ &logthis("sub reply: answer != server answer is $answer, server is $server");
&reconlonc("$perlvar{'lonSockDir'}/$server");
}
$answer=subreply($cmd,$server);
@@ -288,766 +956,2309 @@ sub ishome {
# ======================================================= Continue main program
# ---------------------------------------------------- Fork once and dissociate
-$fpid=fork;
+my $fpid=fork;
exit if $fpid;
-catchdie "Couldn't fork: $!" unless defined ($fpid);
+die "Couldn't fork: $!" unless defined ($fpid);
-POSIX::setsid() or catchdie "Can't start new session: $!";
+POSIX::setsid() or die "Can't start new session: $!";
# ------------------------------------------------------- Write our PID on disk
-$execdir=$perlvar{'lonDaemons'};
+my $execdir=$perlvar{'lonDaemons'};
open (PIDSAVE,">$execdir/logs/lond.pid");
print PIDSAVE "$$\n";
close(PIDSAVE);
&logthis("CRITICAL: ---------- Starting ----------");
+&status('Starting');
+
-# ------------------------------------------------------- Now we are on our own
-
-# Fork off our children.
-for (1 .. $PREFORK) {
- make_new_child();
-}
# ----------------------------------------------------- Install signal handlers
+
$SIG{CHLD} = \&REAPER;
$SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
$SIG{HUP} = \&HUPSMAN;
+$SIG{USR1} = \&checkchildren;
+$SIG{USR2} = \&UpdateHosts;
+
+# Read the host hashes:
+
+ReadHostTable;
+
+# --------------------------------------------------------------
+# Accept connections. When a connection comes in, it is validated
+# and if good, a child process is created to process transactions
+# along the connection.
-# And maintain the population.
while (1) {
- sleep; # wait for a signal (i.e., child's death)
- for ($i = $children; $i < $PREFORK; $i++) {
- make_new_child(); # top up the child pool
- }
+ &status('Starting accept');
+ $client = $server->accept() or next;
+ &status('Accepted '.$client.' off to spawn');
+ make_new_child($client);
+ &status('Finished spawning');
}
sub make_new_child {
my $pid;
my $cipher;
my $sigset;
- &logthis("Attempting to start child");
+
+ $client = shift;
+ &status('Starting new child '.$client);
+ &logthis(' Attempting to start child ('.$client.
+ ")");
# block signal for fork
$sigset = POSIX::SigSet->new(SIGINT);
sigprocmask(SIG_BLOCK, $sigset)
- or catchdie "Can't block SIGINT for fork: $!\n";
-
- catchdie "fork: $!" unless defined ($pid = fork);
+ or die "Can't block SIGINT for fork: $!\n";
+
+ die "fork: $!" unless defined ($pid = fork);
+
+ $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
+ # connection liveness.
+
+ #
+ # Figure out who we're talking to so we can record the peer in
+ # the pid hash.
+ #
+ my $caller = getpeername($client);
+ my ($port,$iaddr)=unpack_sockaddr_in($caller);
+ $clientip=inet_ntoa($iaddr);
if ($pid) {
# Parent records the child's birth and returns.
sigprocmask(SIG_UNBLOCK, $sigset)
- or catchdie "Can't unblock SIGINT for fork: $!\n";
- $children{$pid} = 1;
- $children++;
+ or die "Can't unblock SIGINT for fork: $!\n";
+ $children{$pid} = $clientip;
+ &status('Started child '.$pid);
return;
} else {
# Child can *not* return from this subroutine.
$SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
-
+ $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
+ #don't get intercepted
+ $SIG{USR1}= \&logstatus;
+ $SIG{ALRM}= \&timeout;
+ $lastlog='Forked ';
+ $status='Forked';
+
# unblock signals
sigprocmask(SIG_UNBLOCK, $sigset)
- or catchdie "Can't unblock SIGINT for fork: $!\n";
+ or die "Can't unblock SIGINT for fork: $!\n";
- $tmpsnum=0;
-
- # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
- for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
- $client = $server->accept() or last;
+ my $tmpsnum=0;
+#---------------------------------------------------- kerberos 5 initialization
+ &Authen::Krb5::init_context();
+ &Authen::Krb5::init_ets();
+ &status('Accepted connection');
# =============================================================================
# do something with the connection
# -----------------------------------------------------------------------------
- # see if we know client and check for spoof IP by challenge
- my $caller=getpeername($client);
- my ($port,$iaddr)=unpack_sockaddr_in($caller);
- my $clientip=inet_ntoa($iaddr);
- my $clientrec=($hostid{$clientip} ne undef);
- &logthis(
-"INFO: Connect from $clientip ($hostid{$clientip})");
- my $clientok;
- if ($clientrec) {
- my $remotereq=<$client>;
- $remotereq=~s/\W//g;
- if ($remotereq eq 'init') {
- my $challenge="$$".time;
- print $client "$challenge\n";
- $remotereq=<$client>;
- $remotereq=~s/\W//g;
- if ($challenge eq $remotereq) {
- $clientok=1;
- print $client "ok\n";
- } else {
- &logthis(
- "WARNING: $clientip did not reply challenge");
- print $client "bye\n";
- }
- } else {
- &logthis(
- "WARNING: "
- ."$clientip failed to initialize: >$remotereq< ");
- print $client "bye\n";
- }
+ # see if we know client and check for spoof IP by challenge
+
+ ReadManagerTable; # May also be a manager!!
+
+ my $clientrec=($hostid{$clientip} ne undef);
+ my $ismanager=($managers{$clientip} ne undef);
+ $clientname = "[unknonwn]";
+ if($clientrec) { # Establish client type.
+ $ConnectionType = "client";
+ $clientname = $hostid{$clientip};
+ if($ismanager) {
+ $ConnectionType = "both";
+ }
+ } else {
+ $ConnectionType = "manager";
+ $clientname = $managers{$clientip};
+ }
+ my $clientok;
+ if ($clientrec || $ismanager) {
+ &status("Waiting for init from $clientip $clientname");
+ &logthis('INFO: Connection, '.
+ $clientip.
+ " ($clientname) connection type = $ConnectionType " );
+ &status("Connecting $clientip ($clientname))");
+ my $remotereq=<$client>;
+ $remotereq=~s/[^\w:]//g;
+ if ($remotereq =~ /^init/) {
+ &sethost("sethost:$perlvar{'lonHostID'}");
+ my $challenge="$$".time;
+ print $client "$challenge\n";
+ &status(
+ "Waiting for challenge reply from $clientip ($clientname)");
+ $remotereq=<$client>;
+ $remotereq=~s/\W//g;
+ if ($challenge eq $remotereq) {
+ $clientok=1;
+ print $client "ok\n";
+ } else {
+ &logthis(
+ "WARNING: $clientip did not reply challenge");
+ &status('No challenge reply '.$clientip);
+ }
} else {
- &logthis(
- "WARNING: Unknown client $clientip");
- print $client "bye\n";
- }
- if ($clientok) {
+ &logthis(
+ "WARNING: "
+ ."$clientip failed to initialize: >$remotereq< ");
+ &status('No init '.$clientip);
+ }
+ } else {
+ &logthis(
+ "WARNING: Unknown client $clientip");
+ &status('Hung up on '.$clientip);
+ }
+ if ($clientok) {
# ---------------- New known client connecting, could mean machine online again
- &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
- &logthis(
- "Established connection: $hostid{$clientip}");
+
+ foreach my $id (keys(%hostip)) {
+ if ($hostip{$id} ne $clientip ||
+ $hostip{$currenthostid} eq $clientip) {
+ # no need to try to do recon's to myself
+ next;
+ }
+ &reconlonc("$perlvar{'lonSockDir'}/$id");
+ }
+ &logthis("Established connection: $clientname");
+ &status('Will listen to '.$clientname);
# ------------------------------------------------------------ Process requests
- while (my $userinput=<$client>) {
+ while (my $userinput=<$client>) {
chomp($userinput);
+ Debug("Request = $userinput\n");
+ &status('Processing '.$clientname.': '.$userinput);
my $wasenc=0;
+ alarm(120);
# ------------------------------------------------------------ See if encrypted
if ($userinput =~ /^enc/) {
- if ($cipher) {
- my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
- $userinput='';
- for (my $encidx=0;$encidxdecrypt(
- pack("H16",substr($encinput,$encidx,16))
- );
- }
- $userinput=substr($userinput,0,$cmdlength);
- $wasenc=1;
- }
+ if ($cipher) {
+ my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
+ $userinput='';
+ for (my $encidx=0;$encidxdecrypt(
+ pack("H16",substr($encinput,$encidx,16))
+ );
+ }
+ $userinput=substr($userinput,0,$cmdlength);
+ $wasenc=1;
+ }
}
+
# ------------------------------------------------------------- Normal commands
# ------------------------------------------------------------------------ ping
- if ($userinput =~ /^ping/) {
- print $client "$perlvar{'lonHostID'}\n";
+ if ($userinput =~ /^ping/) { # client only
+ if(isClient) {
+ print $client "$currenthostid\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+ }
# ------------------------------------------------------------------------ pong
- } elsif ($userinput =~ /^pong/) {
- $reply=reply("ping",$hostid{$clientip});
- print $client "$perlvar{'lonHostID'}:$reply\n";
+ }elsif ($userinput =~ /^pong/) { # client only
+ if(isClient) {
+ my $reply=&reply("ping",$clientname);
+ print $client "$currenthostid:$reply\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+ }
# ------------------------------------------------------------------------ ekey
- } elsif ($userinput =~ /^ekey/) {
- my $buildkey=time.$$.int(rand 100000);
- $buildkey=~tr/1-6/A-F/;
- $buildkey=int(rand 100000).$buildkey.int(rand 100000);
- my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
- $key=~tr/a-z/A-Z/;
- $key=~tr/G-P/0-9/;
- $key=~tr/Q-Z/0-9/;
- $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
- $key=substr($key,0,32);
- my $cipherkey=pack("H32",$key);
- $cipher=new IDEA $cipherkey;
- print $client "$buildkey\n";
+ } elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
+ my $buildkey=time.$$.int(rand 100000);
+ $buildkey=~tr/1-6/A-F/;
+ $buildkey=int(rand 100000).$buildkey.int(rand 100000);
+ my $key=$currenthostid.$clientname;
+ $key=~tr/a-z/A-Z/;
+ $key=~tr/G-P/0-9/;
+ $key=~tr/Q-Z/0-9/;
+ $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
+ $key=substr($key,0,32);
+ my $cipherkey=pack("H32",$key);
+ $cipher=new IDEA $cipherkey;
+ print $client "$buildkey\n";
# ------------------------------------------------------------------------ load
- } elsif ($userinput =~ /^load/) {
- my $loadavg;
- {
- my $loadfile=IO::File->new('/proc/loadavg');
- $loadavg=<$loadfile>;
- }
- $loadavg =~ s/\s.*//g;
- my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
- print $client "$loadpercent\n";
+ } elsif ($userinput =~ /^load/) { # client only
+ if (isClient) {
+ my $loadavg;
+ {
+ my $loadfile=IO::File->new('/proc/loadavg');
+ $loadavg=<$loadfile>;
+ }
+ $loadavg =~ s/\s.*//g;
+ my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
+ print $client "$loadpercent\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# -------------------------------------------------------------------- userload
+ } elsif ($userinput =~ /^userload/) { # client only
+ if(isClient) {
+ my $userloadpercent=&userload();
+ print $client "$userloadpercent\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+#
+# Transactions requiring encryption:
+#
+# ----------------------------------------------------------------- currentauth
+ } elsif ($userinput =~ /^currentauth/) {
+ if (($wasenc==1) && isClient) { # Encoded & client only.
+ my ($cmd,$udom,$uname)=split(/:/,$userinput);
+ my $result = GetAuthType($udom, $uname);
+ if($result eq "nouser") {
+ print $client "unknown_user\n";
+ }
+ else {
+ print $client "$result\n"
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+#--------------------------------------------------------------------- pushfile
+ } elsif($userinput =~ /^pushfile/) { # encoded & manager.
+ if(($wasenc == 1) && isManager) {
+ my $cert = GetCertificate($userinput);
+ if(ValidManager($cert)) {
+ my $reply = PushFile($userinput);
+ print $client "$reply\n";
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+#--------------------------------------------------------------------- reinit
+ } elsif($userinput =~ /^reinit/) { # Encoded and manager
+ if (($wasenc == 1) && isManager) {
+ my $cert = GetCertificate($userinput);
+ if(ValidManager($cert)) {
+ chomp($userinput);
+ my $reply = ReinitProcess($userinput);
+ print $client "$reply\n";
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+
+ }
# ------------------------------------------------------------------------ auth
- } elsif ($userinput =~ /^auth/) {
- if ($wasenc==1) {
- my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
- chomp($upass);
- $upass=unescape($upass);
- my $proname=propath($udom,$uname);
- my $passfilename="$proname/passwd";
- if (-e $passfilename) {
- my $pf = IO::File->new($passfilename);
- my $realpasswd=<$pf>;
- chomp($realpasswd);
- my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
- my $pwdcorrect=0;
- if ($howpwd eq 'internal') {
- $pwdcorrect=
- (crypt($upass,$contentpwd) eq $contentpwd);
- } elsif ($howpwd eq 'unix') {
- $contentpwd=(getpwnam($uname))[1];
- $pwdcorrect=
- (crypt($upass,$contentpwd) eq $contentpwd);
- } elsif ($howpwd eq 'krb4') {
- $pwdcorrect=(
- Authen::Krb4::get_pw_in_tkt($uname,"",
- $contentpwd,'krbtgt',$contentpwd,1,
- $upass) == 0);
- }
- if ($pwdcorrect) {
- print $client "authorized\n";
- } else {
- print $client "non_authorized\n";
- }
- } else {
- print $client "unknown_user\n";
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^auth/) { # Encoded and client only.
+ if (($wasenc==1) && isClient) {
+ my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
+ chomp($upass);
+ $upass=unescape($upass);
+ my $proname=propath($udom,$uname);
+ my $passfilename="$proname/passwd";
+ if (-e $passfilename) {
+ my $pf = IO::File->new($passfilename);
+ my $realpasswd=<$pf>;
+ chomp($realpasswd);
+ my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
+ my $pwdcorrect=0;
+ if ($howpwd eq 'internal') {
+ &Debug("Internal auth");
+ $pwdcorrect=
+ (crypt($upass,$contentpwd) eq $contentpwd);
+ } elsif ($howpwd eq 'unix') {
+ &Debug("Unix auth");
+ if((getpwnam($uname))[1] eq "") { #no such user!
+ $pwdcorrect = 0;
+ } else {
+ $contentpwd=(getpwnam($uname))[1];
+ my $pwauth_path="/usr/local/sbin/pwauth";
+ unless ($contentpwd eq 'x') {
+ $pwdcorrect=
+ (crypt($upass,$contentpwd) eq
+ $contentpwd);
+ }
+
+ elsif (-e $pwauth_path) {
+ open PWAUTH, "|$pwauth_path" or
+ die "Cannot invoke authentication";
+ print PWAUTH "$uname\n$upass\n";
+ close PWAUTH;
+ $pwdcorrect=!$?;
+ }
+ }
+ } elsif ($howpwd eq 'krb4') {
+ my $null=pack("C",0);
+ unless ($upass=~/$null/) {
+ my $krb4_error = &Authen::Krb4::get_pw_in_tkt
+ ($uname,"",$contentpwd,'krbtgt',
+ $contentpwd,1,$upass);
+ if (!$krb4_error) {
+ $pwdcorrect = 1;
+ } else {
+ $pwdcorrect=0;
+ # log error if it is not a bad password
+ if ($krb4_error != 62) {
+ &logthis('krb4:'.$uname.','.$contentpwd.','.
+ &Authen::Krb4::get_err_txt($Authen::Krb4::error));
+ }
+ }
+ }
+ } elsif ($howpwd eq 'krb5') {
+ my $null=pack("C",0);
+ unless ($upass=~/$null/) {
+ my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
+ my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
+ my $krbserver=&Authen::Krb5::parse_name($krbservice);
+ my $credentials=&Authen::Krb5::cc_default();
+ $credentials->initialize($krbclient);
+ my $krbreturn =
+ &Authen::Krb5::get_in_tkt_with_password(
+ $krbclient,$krbserver,$upass,$credentials);
+# unless ($krbreturn) {
+# &logthis("Krb5 Error: ".
+# &Authen::Krb5::error());
+# }
+ $pwdcorrect = ($krbreturn == 1);
+ } else { $pwdcorrect=0; }
+ } elsif ($howpwd eq 'localauth') {
+ $pwdcorrect=&localauth::localauth($uname,$upass,
+ $contentpwd);
+ }
+ if ($pwdcorrect) {
+ print $client "authorized\n";
+ } else {
+ print $client "non_authorized\n";
+ }
+ } else {
+ print $client "unknown_user\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ---------------------------------------------------------------------- passwd
- } elsif ($userinput =~ /^passwd/) {
- if ($wasenc==1) {
- my
- ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
- chomp($npass);
- my $proname=propath($udom,$uname);
- my $passfilename="$proname/passwd";
- if (-e $passfilename) {
- my $realpasswd;
- { my $pf = IO::File->new($passfilename);
- $realpasswd=<$pf>; }
- chomp($realpasswd);
- my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
- if ($howpwd eq 'internal') {
- if (crypt($upass,$contentpwd) eq $contentpwd) {
- my $salt=time;
- $salt=substr($salt,6,2);
- my $ncpass=crypt($npass,$salt);
- { my $pf = IO::File->new(">$passfilename");
- print $pf "internal:$ncpass\n";; }
- print $client "ok\n";
- } else {
- print $client "non_authorized\n";
- }
- } else {
- print $client "auth_mode_error\n";
- }
- } else {
- print $client "unknown_user\n";
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^passwd/) { # encoded and client
+ if (($wasenc==1) && isClient) {
+ my
+ ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
+ chomp($npass);
+ $upass=&unescape($upass);
+ $npass=&unescape($npass);
+ &Debug("Trying to change password for $uname");
+ my $proname=propath($udom,$uname);
+ my $passfilename="$proname/passwd";
+ if (-e $passfilename) {
+ my $realpasswd;
+ { my $pf = IO::File->new($passfilename);
+ $realpasswd=<$pf>; }
+ chomp($realpasswd);
+ my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
+ if ($howpwd eq 'internal') {
+ &Debug("internal auth");
+ if (crypt($upass,$contentpwd) eq $contentpwd) {
+ my $salt=time;
+ $salt=substr($salt,6,2);
+ my $ncpass=crypt($npass,$salt);
+ {
+ my $pf;
+ if ($pf = IO::File->new(">$passfilename")) {
+ print $pf "internal:$ncpass\n";
+ &logthis("Result of password change for $uname: pwchange_success");
+ print $client "ok\n";
+ } else {
+ &logthis("Unable to open $uname passwd to change password");
+ print $client "non_authorized\n";
+ }
+ }
+
+ } else {
+ print $client "non_authorized\n";
+ }
+ } elsif ($howpwd eq 'unix') {
+ # Unix means we have to access /etc/password
+ # one way or another.
+ # First: Make sure the current password is
+ # correct
+ &Debug("auth is unix");
+ $contentpwd=(getpwnam($uname))[1];
+ my $pwdcorrect = "0";
+ my $pwauth_path="/usr/local/sbin/pwauth";
+ unless ($contentpwd eq 'x') {
+ $pwdcorrect=
+ (crypt($upass,$contentpwd) eq $contentpwd);
+ } elsif (-e $pwauth_path) {
+ open PWAUTH, "|$pwauth_path" or
+ die "Cannot invoke authentication";
+ print PWAUTH "$uname\n$upass\n";
+ close PWAUTH;
+ &Debug("exited pwauth with $? ($uname,$upass) ");
+ $pwdcorrect=($? == 0);
+ }
+ if ($pwdcorrect) {
+ my $execdir=$perlvar{'lonDaemons'};
+ &Debug("Opening lcpasswd pipeline");
+ my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
+ print $pf "$uname\n$npass\n$npass\n";
+ close $pf;
+ my $err = $?;
+ my $result = ($err>0 ? 'pwchange_failure'
+ : 'ok');
+ &logthis("Result of password change for $uname: ".
+ &lcpasswdstrerror($?));
+ print $client "$result\n";
+ } else {
+ print $client "non_authorized\n";
+ }
+ } else {
+ print $client "auth_mode_error\n";
+ }
+ } else {
+ print $client "unknown_user\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# -------------------------------------------------------------------- makeuser
+ } elsif ($userinput =~ /^makeuser/) { # encoded and client.
+ &Debug("Make user received");
+ my $oldumask=umask(0077);
+ if (($wasenc==1) && isClient) {
+ my
+ ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
+ &Debug("cmd =".$cmd." $udom =".$udom.
+ " uname=".$uname);
+ chomp($npass);
+ $npass=&unescape($npass);
+ my $proname=propath($udom,$uname);
+ my $passfilename="$proname/passwd";
+ &Debug("Password file created will be:".
+ $passfilename);
+ if (-e $passfilename) {
+ print $client "already_exists\n";
+ } elsif ($udom ne $currentdomainid) {
+ print $client "not_right_domain\n";
+ } else {
+ my @fpparts=split(/\//,$proname);
+ my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
+ my $fperror='';
+ for (my $i=3;$i<=$#fpparts;$i++) {
+ $fpnow.='/'.$fpparts[$i];
+ unless (-e $fpnow) {
+ unless (mkdir($fpnow,0777)) {
+ $fperror="error: ".($!+0)
+ ." mkdir failed while attempting "
+ ."makeuser";
+ }
+ }
+ }
+ unless ($fperror) {
+ my $result=&make_passwd_file($uname, $umode,$npass,
+ $passfilename);
+ print $client $result;
+ } else {
+ print $client "$fperror\n";
+ }
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+ umask($oldumask);
+# -------------------------------------------------------------- changeuserauth
+ } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
+ &Debug("Changing authorization");
+ if (($wasenc==1) && isClient) {
+ my
+ ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
+ chomp($npass);
+ &Debug("cmd = ".$cmd." domain= ".$udom.
+ "uname =".$uname." umode= ".$umode);
+ $npass=&unescape($npass);
+ my $proname=&propath($udom,$uname);
+ my $passfilename="$proname/passwd";
+ if ($udom ne $currentdomainid) {
+ print $client "not_right_domain\n";
+ } else {
+ my $result=&make_passwd_file($uname, $umode,$npass,
+ $passfilename);
+ print $client $result;
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------ home
- } elsif ($userinput =~ /^home/) {
- my ($cmd,$udom,$uname)=split(/:/,$userinput);
- chomp($uname);
- my $proname=propath($udom,$uname);
- if (-e $proname) {
- print $client "found\n";
- } else {
- print $client "not_found\n";
- }
+ } elsif ($userinput =~ /^home/) { # client clear or encoded
+ if(isClient) {
+ my ($cmd,$udom,$uname)=split(/:/,$userinput);
+ chomp($uname);
+ my $proname=propath($udom,$uname);
+ if (-e $proname) {
+ print $client "found\n";
+ } else {
+ print $client "not_found\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ---------------------------------------------------------------------- update
- } elsif ($userinput =~ /^update/) {
- my ($cmd,$fname)=split(/:/,$userinput);
- my $ownership=ishome($fname);
- if ($ownership eq 'not_owner') {
- if (-e $fname) {
- my ($dev,$ino,$mode,$nlink,
- $uid,$gid,$rdev,$size,
- $atime,$mtime,$ctime,
- $blksize,$blocks)=stat($fname);
- $now=time;
- $since=$now-$atime;
- if ($since>$perlvar{'lonExpire'}) {
- $reply=
- reply("unsub:$fname","$hostid{$clientip}");
- unlink("$fname");
- } else {
- my $transname="$fname.in.transfer";
- my $remoteurl=
- reply("sub:$fname","$hostid{$clientip}");
- my $response;
- {
- my $ua=new LWP::UserAgent;
- my $request=new HTTP::Request('GET',"$remoteurl");
- $response=$ua->request($request,$transname);
- }
- if ($response->is_error()) {
- unlink($transname);
- my $message=$response->status_line;
- &logthis(
- "LWP GET: $message for $fname ($remoteurl)");
- } else {
- if ($remoteurl!~/\.meta$/) {
- my $mrequest=
- new HTTP::Request('GET',$remoteurl.'.meta');
- my $mresponse=
- $ua->request($mrequest,$fname.'.meta');
- if ($mresponse->is_error()) {
- unlink($fname.'.meta');
- }
- }
- rename($transname,$fname);
- }
- }
- print $client "ok\n";
- } else {
- print $client "not_found\n";
- }
- } else {
- print $client "rejected\n";
- }
+ } elsif ($userinput =~ /^update/) { # client clear or encoded.
+ if(isClient) {
+ my ($cmd,$fname)=split(/:/,$userinput);
+ my $ownership=ishome($fname);
+ if ($ownership eq 'not_owner') {
+ if (-e $fname) {
+ my ($dev,$ino,$mode,$nlink,
+ $uid,$gid,$rdev,$size,
+ $atime,$mtime,$ctime,
+ $blksize,$blocks)=stat($fname);
+ my $now=time;
+ my $since=$now-$atime;
+ if ($since>$perlvar{'lonExpire'}) {
+ my $reply=
+ &reply("unsub:$fname","$clientname");
+ unlink("$fname");
+ } else {
+ my $transname="$fname.in.transfer";
+ my $remoteurl=
+ &reply("sub:$fname","$clientname");
+ my $response;
+ {
+ my $ua=new LWP::UserAgent;
+ my $request=new HTTP::Request('GET',"$remoteurl");
+ $response=$ua->request($request,$transname);
+ }
+ if ($response->is_error()) {
+ unlink($transname);
+ my $message=$response->status_line;
+ &logthis(
+ "LWP GET: $message for $fname ($remoteurl)");
+ } else {
+ if ($remoteurl!~/\.meta$/) {
+ my $ua=new LWP::UserAgent;
+ my $mrequest=
+ new HTTP::Request('GET',$remoteurl.'.meta');
+ my $mresponse=
+ $ua->request($mrequest,$fname.'.meta');
+ if ($mresponse->is_error()) {
+ unlink($fname.'.meta');
+ }
+ }
+ rename($transname,$fname);
+ }
+ }
+ print $client "ok\n";
+ } else {
+ print $client "not_found\n";
+ }
+ } else {
+ print $client "rejected\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# -------------------------------------- fetch a user file from a remote server
+ } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
+ if(isClient) {
+ my ($cmd,$fname)=split(/:/,$userinput);
+ my ($udom,$uname,$ufile)=split(/\//,$fname);
+ my $udir=propath($udom,$uname).'/userfiles';
+ unless (-e $udir) { mkdir($udir,0770); }
+ if (-e $udir) {
+ $ufile=~s/^[\.\~]+//;
+ $ufile=~s/\///g;
+ my $destname=$udir.'/'.$ufile;
+ my $transname=$udir.'/'.$ufile.'.in.transit';
+ my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
+ my $response;
+ {
+ my $ua=new LWP::UserAgent;
+ my $request=new HTTP::Request('GET',"$remoteurl");
+ $response=$ua->request($request,$transname);
+ }
+ if ($response->is_error()) {
+ unlink($transname);
+ my $message=$response->status_line;
+ &logthis("LWP GET: $message for $fname ($remoteurl)");
+ print $client "failed\n";
+ } else {
+ if (!rename($transname,$destname)) {
+ &logthis("Unable to move $transname to $destname");
+ unlink($transname);
+ print $client "failed\n";
+ } else {
+ print $client "ok\n";
+ }
+ }
+ } else {
+ print $client "not_home\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# ------------------------------------------ authenticate access to a user file
+ } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
+ if(isClient) {
+ my ($cmd,$fname,$session)=split(/:/,$userinput);
+ chomp($session);
+ my $reply='non_auth';
+ if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
+ $session.'.id')) {
+ while (my $line=) {
+ if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
+ }
+ close(ENVIN);
+ print $client $reply."\n";
+ } else {
+ print $client "invalid_token\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------- unsubscribe
- } elsif ($userinput =~ /^unsub/) {
- my ($cmd,$fname)=split(/:/,$userinput);
- if (-e $fname) {
- if (unlink("$fname.$hostid{$clientip}")) {
- print $client "ok\n";
- } else {
- print $client "not_subscribed\n";
- }
- } else {
- print $client "not_found\n";
- }
+ } elsif ($userinput =~ /^unsub/) {
+ if(isClient) {
+ my ($cmd,$fname)=split(/:/,$userinput);
+ if (-e $fname) {
+ print $client &unsub($client,$fname,$clientip);
+ } else {
+ print $client "not_found\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------- subscribe
- } elsif ($userinput =~ /^sub/) {
- my ($cmd,$fname)=split(/:/,$userinput);
- my $ownership=ishome($fname);
- if ($ownership eq 'owner') {
- if (-e $fname) {
- if (-d $fname) {
- print $client "directory\n";
- } else {
- $now=time;
- {
- my $sh;
- if ($sh=
- IO::File->new(">$fname.$hostid{$clientip}")) {
- print $sh "$clientip:$now\n";
- }
- }
- $fname=~s/\/home\/httpd\/html\/res/raw/;
- $fname="http://$thisserver/".$fname;
- print $client "$fname\n";
- }
- } else {
- print $client "not_found\n";
- }
- } else {
- print $client "rejected\n";
- }
+ } elsif ($userinput =~ /^sub/) {
+ if(isClient) {
+ print $client &subscribe($userinput,$clientip);
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# ------------------------------------------------------------- current version
+ } elsif ($userinput =~ /^currentversion/) {
+ if(isClient) {
+ my ($cmd,$fname)=split(/:/,$userinput);
+ print $client ¤tversion($fname)."\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------- log
- } elsif ($userinput =~ /^log/) {
- my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
- chomp($what);
- my $proname=propath($udom,$uname);
- my $now=time;
- {
- my $hfh;
- if ($hfh=IO::File->new(">>$proname/activity.log")) {
- print $hfh "$now:$hostid{$clientip}:$what\n";
- print $client "ok\n";
- } else {
- print $client "error:$!\n";
- }
- }
+ } elsif ($userinput =~ /^log/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
+ chomp($what);
+ my $proname=propath($udom,$uname);
+ my $now=time;
+ {
+ my $hfh;
+ if ($hfh=IO::File->new(">>$proname/activity.log")) {
+ print $hfh "$now:$clientname:$what\n";
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." IO::File->new Failed "
+ ."while attempting log\n";
+ }
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------- put
- } elsif ($userinput =~ /^put/) {
- my ($cmd,$udom,$uname,$namespace,$what)
- =split(/:/,$userinput);
- $namespace=~s/\//\_/g;
- $namespace=~s/\W//g;
- if ($namespace ne 'roles') {
- chomp($what);
- my $proname=propath($udom,$uname);
- my $now=time;
- {
- my $hfh;
- if (
- $hfh=IO::File->new(">>$proname/$namespace.hist")
- ) { print $hfh "P:$now:$what\n"; }
- }
- my @pairs=split(/\&/,$what);
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
- foreach $pair (@pairs) {
- ($key,$value)=split(/=/,$pair);
- $hash{$key}=$value;
- }
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^put/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$namespace,$what)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ if ($namespace ne 'roles') {
+ chomp($what);
+ my $proname=propath($udom,$uname);
+ my $now=time;
+ unless ($namespace=~/^nohist\_/) {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname/$namespace.hist")
+ ) { print $hfh "P:$now:$what\n"; }
+ }
+ my @pairs=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',
+ "$proname/$namespace.db",
+ &GDBM_WRCREAT(),0640)) {
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ $hash{$key}=$value;
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) failed ".
+ "while attempting put\n";
+ }
+ } else {
+ print $client "error: ".($!)
+ ." tie(GDBM) Failed ".
+ "while attempting put\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# ------------------------------------------------------------------- inc
+ } elsif ($userinput =~ /^inc:/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$namespace,$what)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ if ($namespace ne 'roles') {
+ chomp($what);
+ my $proname=propath($udom,$uname);
+ my $now=time;
+ unless ($namespace=~/^nohist\_/) {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname/$namespace.hist")
+ ) { print $hfh "P:$now:$what\n"; }
+ }
+ my @pairs=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',
+ "$proname/$namespace.db",
+ &GDBM_WRCREAT(),0640)) {
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ # We could check that we have a number...
+ if (! defined($value) || $value eq '') {
+ $value = 1;
+ }
+ $hash{$key}+=$value;
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) failed ".
+ "while attempting put\n";
+ }
+ } else {
+ print $client "error: ".($!)
+ ." tie(GDBM) Failed ".
+ "while attempting put\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# -------------------------------------------------------------------- rolesput
- } elsif ($userinput =~ /^rolesput/) {
- if ($wasenc==1) {
- my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
- =split(/:/,$userinput);
- my $namespace='roles';
- chomp($what);
- my $proname=propath($udom,$uname);
- my $now=time;
- {
- my $hfh;
- if (
- $hfh=IO::File->new(">>$proname/$namespace.hist")
- ) {
- print $hfh "P:$now:$exedom:$exeuser:$what\n";
- }
- }
- my @pairs=split(/\&/,$what);
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
- foreach $pair (@pairs) {
- ($key,$value)=split(/=/,$pair);
- $hash{$key}=$value;
- }
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^rolesput/) {
+ if(isClient) {
+ &Debug("rolesput");
+ if ($wasenc==1) {
+ my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
+ =split(/:/,$userinput);
+ &Debug("cmd = ".$cmd." exedom= ".$exedom.
+ "user = ".$exeuser." udom=".$udom.
+ "what = ".$what);
+ my $namespace='roles';
+ chomp($what);
+ my $proname=propath($udom,$uname);
+ my $now=time;
+ {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname/$namespace.hist")
+ ) {
+ print $hfh "P:$now:$exedom:$exeuser:$what\n";
+ }
+ }
+ my @pairs=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ &ManagePermissions($key, $udom, $uname,
+ &GetAuthType( $udom,
+ $uname));
+ $hash{$key}=$value;
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting rolesput\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting rolesput\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# -------------------------------------------------------------------- rolesdel
+ } elsif ($userinput =~ /^rolesdel/) {
+ if(isClient) {
+ &Debug("rolesdel");
+ if ($wasenc==1) {
+ my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
+ =split(/:/,$userinput);
+ &Debug("cmd = ".$cmd." exedom= ".$exedom.
+ "user = ".$exeuser." udom=".$udom.
+ "what = ".$what);
+ my $namespace='roles';
+ chomp($what);
+ my $proname=propath($udom,$uname);
+ my $now=time;
+ {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname/$namespace.hist")
+ ) {
+ print $hfh "D:$now:$exedom:$exeuser:$what\n";
+ }
+ }
+ my @rolekeys=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
+ foreach my $key (@rolekeys) {
+ delete $hash{$key};
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting rolesdel\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting rolesdel\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------- get
- } elsif ($userinput =~ /^get/) {
- my ($cmd,$udom,$uname,$namespace,$what)
- =split(/:/,$userinput);
- $namespace=~s/\//\_/g;
- $namespace=~s/\W//g;
- chomp($what);
- my @queries=split(/\&/,$what);
- my $proname=propath($udom,$uname);
- my $qresult='';
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
- for ($i=0;$i<=$#queries;$i++) {
- $qresult.="$hash{$queries[$i]}&";
- }
- if (untie(%hash)) {
- $qresult=~s/\&$//;
- print $client "$qresult\n";
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
+ } elsif ($userinput =~ /^get/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$namespace,$what)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ chomp($what);
+ my @queries=split(/\&/,$what);
+ my $proname=propath($udom,$uname);
+ my $qresult='';
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
+ for (my $i=0;$i<=$#queries;$i++) {
+ $qresult.="$hash{$queries[$i]}&";
+ }
+ if (untie(%hash)) {
+ $qresult=~s/\&$//;
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting get\n";
+ }
+ } else {
+ if ($!+0 == 2) {
+ print $client "error:No such file or ".
+ "GDBM reported bad block error\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting get\n";
+ }
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------ eget
- } elsif ($userinput =~ /^eget/) {
- my ($cmd,$udom,$uname,$namespace,$what)
- =split(/:/,$userinput);
- $namespace=~s/\//\_/g;
- $namespace=~s/\W//g;
- chomp($what);
- my @queries=split(/\&/,$what);
- my $proname=propath($udom,$uname);
- my $qresult='';
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
- for ($i=0;$i<=$#queries;$i++) {
- $qresult.="$hash{$queries[$i]}&";
- }
- if (untie(%hash)) {
- $qresult=~s/\&$//;
- if ($cipher) {
- my $cmdlength=length($qresult);
- $qresult.=" ";
- my $encqresult='';
- for
- (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
- $encqresult.=
- unpack("H16",
- $cipher->encrypt(substr($qresult,$encidx,8)));
- }
- print $client "enc:$cmdlength:$encqresult\n";
- } else {
- print $client "error:no_key\n";
- }
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
+ } elsif ($userinput =~ /^eget/) {
+ if (isClient) {
+ my ($cmd,$udom,$uname,$namespace,$what)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ chomp($what);
+ my @queries=split(/\&/,$what);
+ my $proname=propath($udom,$uname);
+ my $qresult='';
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
+ for (my $i=0;$i<=$#queries;$i++) {
+ $qresult.="$hash{$queries[$i]}&";
+ }
+ if (untie(%hash)) {
+ $qresult=~s/\&$//;
+ if ($cipher) {
+ my $cmdlength=length($qresult);
+ $qresult.=" ";
+ my $encqresult='';
+ for
+ (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
+ $encqresult.=
+ unpack("H16",
+ $cipher->encrypt(substr($qresult,$encidx,8)));
+ }
+ print $client "enc:$cmdlength:$encqresult\n";
+ } else {
+ print $client "error:no_key\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting eget\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting eget\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------- del
- } elsif ($userinput =~ /^del/) {
- my ($cmd,$udom,$uname,$namespace,$what)
- =split(/:/,$userinput);
- $namespace=~s/\//\_/g;
- $namespace=~s/\W//g;
- chomp($what);
- my $proname=propath($udom,$uname);
- my $now=time;
- {
- my $hfh;
- if (
- $hfh=IO::File->new(">>$proname/$namespace.hist")
- ) { print $hfh "D:$now:$what\n"; }
- }
- my @keys=split(/\&/,$what);
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
- foreach $key (@keys) {
- delete($hash{$key});
- }
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
+ } elsif ($userinput =~ /^del/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$namespace,$what)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ chomp($what);
+ my $proname=propath($udom,$uname);
+ my $now=time;
+ unless ($namespace=~/^nohist\_/) {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname/$namespace.hist")
+ ) { print $hfh "D:$now:$what\n"; }
+ }
+ my @keys=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
+ foreach my $key (@keys) {
+ delete($hash{$key});
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting del\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting del\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------ keys
- } elsif ($userinput =~ /^keys/) {
- my ($cmd,$udom,$uname,$namespace)
- =split(/:/,$userinput);
- $namespace=~s/\//\_/g;
- $namespace=~s/\W//g;
- my $proname=propath($udom,$uname);
- my $qresult='';
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
- foreach $key (keys %hash) {
- $qresult.="$key&";
- }
- if (untie(%hash)) {
- $qresult=~s/\&$//;
- print $client "$qresult\n";
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
+ } elsif ($userinput =~ /^keys/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$namespace)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ my $proname=propath($udom,$uname);
+ my $qresult='';
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
+ foreach my $key (keys %hash) {
+ $qresult.="$key&";
+ }
+ if (untie(%hash)) {
+ $qresult=~s/\&$//;
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting keys\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting keys\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# ----------------------------------------------------------------- dumpcurrent
+ } elsif ($userinput =~ /^currentdump/) {
+ if (isClient) {
+ my ($cmd,$udom,$uname,$namespace)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ my $qresult='';
+ my $proname=propath($udom,$uname);
+ my %hash;
+ if (tie(%hash,'GDBM_File',
+ "$proname/$namespace.db",
+ &GDBM_READER(),0640)) {
+ # Structure of %data:
+ # $data{$symb}->{$parameter}=$value;
+ # $data{$symb}->{'v.'.$parameter}=$version;
+ # since $parameter will be unescaped, we do not
+ # have to worry about silly parameter names...
+ my %data = ();
+ while (my ($key,$value) = each(%hash)) {
+ my ($v,$symb,$param) = split(/:/,$key);
+ next if ($v eq 'version' || $symb eq 'keys');
+ next if (exists($data{$symb}) &&
+ exists($data{$symb}->{$param}) &&
+ $data{$symb}->{'v.'.$param} > $v);
+ $data{$symb}->{$param}=$value;
+ $data{$symb}->{'v.'.$param}=$v;
+ }
+ if (untie(%hash)) {
+ while (my ($symb,$param_hash) = each(%data)) {
+ while(my ($param,$value) = each (%$param_hash)){
+ next if ($param =~ /^v\./);
+ $qresult.=$symb.':'.$param.'='.$value.'&';
+ }
+ }
+ chop($qresult);
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting currentdump\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting currentdump\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+ }
# ------------------------------------------------------------------------ dump
- } elsif ($userinput =~ /^dump/) {
- my ($cmd,$udom,$uname,$namespace)
- =split(/:/,$userinput);
- $namespace=~s/\//\_/g;
- $namespace=~s/\W//g;
- my $proname=propath($udom,$uname);
- my $qresult='';
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
- foreach $key (keys %hash) {
- $qresult.="$key=$hash{$key}&";
- }
- if (untie(%hash)) {
- $qresult=~s/\&$//;
- print $client "$qresult\n";
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
+ } elsif ($userinput =~ /^dump/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$namespace,$regexp)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ if (defined($regexp)) {
+ $regexp=&unescape($regexp);
+ } else {
+ $regexp='.';
+ }
+ my $qresult='';
+ my $proname=propath($udom,$uname);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
+ study($regexp);
+ while (my ($key,$value) = each(%hash)) {
+ if ($regexp eq '.') {
+ $qresult.=$key.'='.$value.'&';
+ } else {
+ my $unescapeKey = &unescape($key);
+ if (eval('$unescapeKey=~/$regexp/')) {
+ $qresult.="$key=$value&";
+ }
+ }
+ }
+ if (untie(%hash)) {
+ chop($qresult);
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting dump\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting dump\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------------- store
- } elsif ($userinput =~ /^store/) {
- my ($cmd,$udom,$uname,$namespace,$rid,$what)
- =split(/:/,$userinput);
- $namespace=~s/\//\_/g;
- $namespace=~s/\W//g;
- if ($namespace ne 'roles') {
- chomp($what);
- my $proname=propath($udom,$uname);
- my $now=time;
- {
- my $hfh;
- if (
- $hfh=IO::File->new(">>$proname/$namespace.hist")
- ) { print $hfh "P:$now:$rid:$what\n"; }
- }
- my @pairs=split(/\&/,$what);
-
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
- my @previouskeys=split(/&/,$hash{"keys:$rid"});
- my $key;
- $hash{"version:$rid"}++;
- my $version=$hash{"version:$rid"};
- my $allkeys='';
- foreach $pair (@pairs) {
- ($key,$value)=split(/=/,$pair);
- $allkeys.=$key.':';
- $hash{"$version:$rid:$key"}=$value;
- }
- $allkeys=~s/:$//;
- $hash{"$version:keys:$rid"}=$allkeys;
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^store/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$namespace,$rid,$what)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ if ($namespace ne 'roles') {
+ chomp($what);
+ my $proname=propath($udom,$uname);
+ my $now=time;
+ unless ($namespace=~/^nohist\_/) {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname/$namespace.hist")
+ ) { print $hfh "P:$now:$rid:$what\n"; }
+ }
+ my @pairs=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
+ my @previouskeys=split(/&/,$hash{"keys:$rid"});
+ my $key;
+ $hash{"version:$rid"}++;
+ my $version=$hash{"version:$rid"};
+ my $allkeys='';
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ $allkeys.=$key.':';
+ $hash{"$version:$rid:$key"}=$value;
+ }
+ $hash{"$version:$rid:timestamp"}=$now;
+ $allkeys.='timestamp';
+ $hash{"$version:keys:$rid"}=$allkeys;
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting store\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting store\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# --------------------------------------------------------------------- restore
- } elsif ($userinput =~ /^restore/) {
- my ($cmd,$udom,$uname,$namespace,$rid)
- =split(/:/,$userinput);
- $namespace=~s/\//\_/g;
- $namespace=~s/\W//g;
- chomp($rid);
- my $proname=propath($udom,$uname);
- my $qresult='';
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
- my $version=$hash{"version:$rid"};
- $qresult.="version=$version&";
- my $scope;
- for ($scope=1;$scope<=$version;$scope++) {
- my $vkeys=$hash{"$scope:keys:$rid"};
- my @keys=split(/:/,$vkeys);
- my $key;
- $qresult.="$scope:keys=$vkeys&";
- foreach $key (@keys) {
- $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
- }
- }
- if (untie(%hash)) {
- $qresult=~s/\&$//;
- print $client "$qresult\n";
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
+ } elsif ($userinput =~ /^restore/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$namespace,$rid)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ chomp($rid);
+ my $proname=propath($udom,$uname);
+ my $qresult='';
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
+ my $version=$hash{"version:$rid"};
+ $qresult.="version=$version&";
+ my $scope;
+ for ($scope=1;$scope<=$version;$scope++) {
+ my $vkeys=$hash{"$scope:keys:$rid"};
+ my @keys=split(/:/,$vkeys);
+ my $key;
+ $qresult.="$scope:keys=$vkeys&";
+ foreach $key (@keys) {
+ $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
+ }
+ }
+ if (untie(%hash)) {
+ $qresult=~s/\&$//;
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting restore\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting restore\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# -------------------------------------------------------------------- chatsend
+ } elsif ($userinput =~ /^chatsend/) {
+ if(isClient) {
+ my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
+ &chatadd($cdom,$cnum,$newpost);
+ print $client "ok\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# -------------------------------------------------------------------- chatretr
+ } elsif ($userinput =~ /^chatretr/) {
+ if(isClient) {
+ my
+ ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
+ my $reply='';
+ foreach (&getchat($cdom,$cnum,$udom,$uname)) {
+ $reply.=&escape($_).':';
+ }
+ $reply=~s/\:$//;
+ print $client $reply."\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------- querysend
- } elsif ($userinput =~ /^querysend/) {
- my ($cmd,$query)=split(/:/,$userinput);
- $query=~s/\n*$//g;
- print $client sqlreply("$hostid{$clientip}\&$query")."\n";
+ } elsif ($userinput =~ /^querysend/) {
+ if(isClient) {
+ my ($cmd,$query,
+ $arg1,$arg2,$arg3)=split(/\:/,$userinput);
+ $query=~s/\n*$//g;
+ print $client "".
+ sqlreply("$clientname\&$query".
+ "\&$arg1"."\&$arg2"."\&$arg3")."\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------ queryreply
- } elsif ($userinput =~ /^queryreply/) {
- my ($cmd,$id,$reply)=split(/:/,$userinput);
- my $store;
- my $execdir=$perlvar{'lonDaemons'};
- if ($store=IO::File->new(">$execdir/tmp/$id")) {
- print $store $reply;
- close $store;
- print $client "ok\n";
- }
- else {
- print $client "error:$!\n";
- }
+ } elsif ($userinput =~ /^queryreply/) {
+ if(isClient) {
+ my ($cmd,$id,$reply)=split(/:/,$userinput);
+ my $store;
+ my $execdir=$perlvar{'lonDaemons'};
+ if ($store=IO::File->new(">$execdir/tmp/$id")) {
+ $reply=~s/\&/\n/g;
+ print $store $reply;
+ close $store;
+ my $store2=IO::File->new(">$execdir/tmp/$id.end");
+ print $store2 "done\n";
+ close $store2;
+ print $client "ok\n";
+ }
+ else {
+ print $client "error: ".($!+0)
+ ." IO::File->new Failed ".
+ "while attempting queryreply\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# ----------------------------------------------------------------- courseidput
+ } elsif ($userinput =~ /^courseidput/) {
+ if(isClient) {
+ my ($cmd,$udom,$what)=split(/:/,$userinput);
+ chomp($what);
+ $udom=~s/\W//g;
+ my $proname=
+ "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
+ my $now=time;
+ my @pairs=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ $hash{$key}=$value.':'.$now;
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting courseidput\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting courseidput\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# ---------------------------------------------------------------- courseiddump
+ } elsif ($userinput =~ /^courseiddump/) {
+ if(isClient) {
+ my ($cmd,$udom,$since,$description)
+ =split(/:/,$userinput);
+ if (defined($description)) {
+ $description=&unescape($description);
+ } else {
+ $description='.';
+ }
+ unless (defined($since)) { $since=0; }
+ my $qresult='';
+ my $proname=
+ "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
+ while (my ($key,$value) = each(%hash)) {
+ my ($descr,$lasttime)=split(/\:/,$value);
+ if ($lasttime<$since) { next; }
+ if ($description eq '.') {
+ $qresult.=$key.'='.$descr.'&';
+ } else {
+ my $unescapeVal = &unescape($descr);
+ if (eval('$unescapeVal=~/$description/i')) {
+ $qresult.="$key=$descr&";
+ }
+ }
+ }
+ if (untie(%hash)) {
+ chop($qresult);
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting courseiddump\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting courseiddump\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------------- idput
- } elsif ($userinput =~ /^idput/) {
- my ($cmd,$udom,$what)=split(/:/,$userinput);
- chomp($what);
- $udom=~s/\W//g;
- my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
- my $now=time;
- {
- my $hfh;
- if (
- $hfh=IO::File->new(">>$proname.hist")
- ) { print $hfh "P:$now:$what\n"; }
- }
- my @pairs=split(/\&/,$what);
- if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
- foreach $pair (@pairs) {
- ($key,$value)=split(/=/,$pair);
- $hash{$key}=$value;
- }
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
+ } elsif ($userinput =~ /^idput/) {
+ if(isClient) {
+ my ($cmd,$udom,$what)=split(/:/,$userinput);
+ chomp($what);
+ $udom=~s/\W//g;
+ my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
+ my $now=time;
+ {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname.hist")
+ ) { print $hfh "P:$now:$what\n"; }
+ }
+ my @pairs=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ $hash{$key}=$value;
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting idput\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting idput\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------------- idget
- } elsif ($userinput =~ /^idget/) {
- my ($cmd,$udom,$what)=split(/:/,$userinput);
- chomp($what);
- $udom=~s/\W//g;
- my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
- my @queries=split(/\&/,$what);
- my $qresult='';
- if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
- for ($i=0;$i<=$#queries;$i++) {
- $qresult.="$hash{$queries[$i]}&";
- }
- if (untie(%hash)) {
- $qresult=~s/\&$//;
- print $client "$qresult\n";
- } else {
- print $client "error:$!\n";
- }
- } else {
- print $client "error:$!\n";
- }
+ } elsif ($userinput =~ /^idget/) {
+ if(isClient) {
+ my ($cmd,$udom,$what)=split(/:/,$userinput);
+ chomp($what);
+ $udom=~s/\W//g;
+ my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
+ my @queries=split(/\&/,$what);
+ my $qresult='';
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
+ for (my $i=0;$i<=$#queries;$i++) {
+ $qresult.="$hash{$queries[$i]}&";
+ }
+ if (untie(%hash)) {
+ $qresult=~s/\&$//;
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting idget\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting idget\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ---------------------------------------------------------------------- tmpput
- } elsif ($userinput =~ /^tmpput/) {
- my ($cmd,$what)=split(/:/,$userinput);
- my $store;
- $tmpsnum++;
- my $id=$$.'_'.$clientip.'_'.$tmpsnum;
- $id=~s/\W/\_/g;
- $what=~s/\n//g;
- my $execdir=$perlvar{'lonDaemons'};
- if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
- print $store $what;
- close $store;
- print $client "$id\n";
- }
- else {
- print $client "error:$!\n";
- }
-
+ } elsif ($userinput =~ /^tmpput/) {
+ if(isClient) {
+ my ($cmd,$what)=split(/:/,$userinput);
+ my $store;
+ $tmpsnum++;
+ my $id=$$.'_'.$clientip.'_'.$tmpsnum;
+ $id=~s/\W/\_/g;
+ $what=~s/\n//g;
+ my $execdir=$perlvar{'lonDaemons'};
+ if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
+ print $store $what;
+ close $store;
+ print $client "$id\n";
+ }
+ else {
+ print $client "error: ".($!+0)
+ ."IO::File->new Failed ".
+ "while attempting tmpput\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+
# ---------------------------------------------------------------------- tmpget
- } elsif ($userinput =~ /^tmpget/) {
- my ($cmd,$id)=split(/:/,$userinput);
- chomp($id);
- $id=~s/\W/\_/g;
- my $store;
- my $execdir=$perlvar{'lonDaemons'};
- if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
- my $reply=<$store>;
- print $client "$reply\n";
- close $store;
- }
- else {
- print $client "error:$!\n";
- }
-
+ } elsif ($userinput =~ /^tmpget/) {
+ if(isClient) {
+ my ($cmd,$id)=split(/:/,$userinput);
+ chomp($id);
+ $id=~s/\W/\_/g;
+ my $store;
+ my $execdir=$perlvar{'lonDaemons'};
+ if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
+ my $reply=<$store>;
+ print $client "$reply\n";
+ close $store;
+ }
+ else {
+ print $client "error: ".($!+0)
+ ."IO::File->new Failed ".
+ "while attempting tmpget\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# ---------------------------------------------------------------------- tmpdel
+ } elsif ($userinput =~ /^tmpdel/) {
+ if(isClient) {
+ my ($cmd,$id)=split(/:/,$userinput);
+ chomp($id);
+ $id=~s/\W/\_/g;
+ my $execdir=$perlvar{'lonDaemons'};
+ if (unlink("$execdir/tmp/$id.tmp")) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ."Unlink tmp Failed ".
+ "while attempting tmpdel\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# -------------------------------------------------------------------------- ls
- } elsif ($userinput =~ /^ls/) {
- my ($cmd,$ulsdir)=split(/:/,$userinput);
- my $ulsout='';
- my $ulsfn;
- if (-e $ulsdir) {
- while ($ulsfn=<$ulsdir/*>) {
- my @ulsstats=stat($ulsfn);
- $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
- }
- } else {
- $ulsout='no_such_dir';
- }
- if ($ulsout eq '') { $ulsout='empty'; }
- print $client "$ulsout\n";
+ } elsif ($userinput =~ /^ls/) {
+ if(isClient) {
+ my ($cmd,$ulsdir)=split(/:/,$userinput);
+ my $ulsout='';
+ my $ulsfn;
+ if (-e $ulsdir) {
+ if(-d $ulsdir) {
+ if (opendir(LSDIR,$ulsdir)) {
+ while ($ulsfn=readdir(LSDIR)) {
+ my @ulsstats=stat($ulsdir.'/'.$ulsfn);
+ $ulsout.=$ulsfn.'&'.
+ join('&',@ulsstats).':';
+ }
+ closedir(LSDIR);
+ }
+ } else {
+ my @ulsstats=stat($ulsdir);
+ $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
+ }
+ } else {
+ $ulsout='no_such_dir';
+ }
+ if ($ulsout eq '') { $ulsout='empty'; }
+ print $client "$ulsout\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# ----------------------------------------------------------------- setannounce
+ } elsif ($userinput =~ /^setannounce/) {
+ if (isClient) {
+ my ($cmd,$announcement)=split(/:/,$userinput);
+ chomp($announcement);
+ $announcement=&unescape($announcement);
+ if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
+ '/announcement.txt')) {
+ print $store $announcement;
+ close $store;
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)."\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# ------------------------------------------------------------------ Hanging up
+ } elsif (($userinput =~ /^exit/) ||
+ ($userinput =~ /^init/)) { # no restrictions.
+ &logthis(
+ "Client $clientip ($clientname) hanging up: $userinput");
+ print $client "bye\n";
+ $client->shutdown(2); # shutdown the socket forcibly.
+ $client->close();
+ last;
+
+# ---------------------------------- set current host/domain
+ } elsif ($userinput =~ /^sethost:/) {
+ if (isClient) {
+ print $client &sethost($userinput)."\n";
+ } else {
+ print $client "refused\n";
+ }
+#---------------------------------- request file (?) version.
+ } elsif ($userinput =~/^version:/) {
+ if (isClient) {
+ print $client &version($userinput)."\n";
+ } else {
+ print $client "refused\n";
+ }
# ------------------------------------------------------------- unknown command
- } else {
- # unknown command
- print $client "unknown_cmd\n";
- }
-# ------------------------------------------------------ client unknown, refuse
- }
- } else {
- print $client "refused\n";
- &logthis("WARNING: "
- ."Rejected client $clientip, closing connection");
- }
- &logthis("CRITICAL: "
- ."Disconnect from $clientip ($hostid{$clientip})");
+
+ } else {
+ # unknown command
+ print $client "unknown_cmd\n";
+ }
+# -------------------------------------------------------------------- complete
+ alarm(0);
+ &status('Listening to '.$clientname);
+ }
+# --------------------------------------------- client unknown or fishy, refuse
+ } else {
+ print $client "refused\n";
+ $client->close();
+ &logthis("WARNING: "
+ ."Rejected client $clientip, closing connection");
+ }
+ }
+
# =============================================================================
- }
- # tidy up gracefully and finish
+ &logthis("CRITICAL: "
+ ."Disconnect from $clientip ($clientname)");
+
+
+ # this exit is VERY important, otherwise the child will become
+ # a producer of more and more children, forking yourself into
+ # process death.
+ exit;
- # this exit is VERY important, otherwise the child will become
- # a producer of more and more children, forking yourself into
- # process death.
- exit;
+}
+
+
+#
+# Checks to see if the input roleput request was to set
+# an author role. If so, invokes the lchtmldir script to set
+# up a correct public_html
+# Parameters:
+# request - The request sent to the rolesput subchunk.
+# We're looking for /domain/_au
+# domain - The domain in which the user is having roles doctored.
+# user - Name of the user for which the role is being put.
+# authtype - The authentication type associated with the user.
+#
+sub ManagePermissions
+{
+ my $request = shift;
+ my $domain = shift;
+ my $user = shift;
+ my $authtype= shift;
+
+ # See if the request is of the form /$domain/_au
+ &logthis("ruequest is $request");
+ if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
+ my $execdir = $perlvar{'lonDaemons'};
+ my $userhome= "/home/$user" ;
+ &logthis("system $execdir/lchtmldir $userhome $user $authtype");
+ system("$execdir/lchtmldir $userhome $user $authtype");
+ }
+}
+#
+# GetAuthType - Determines the authorization type of a user in a domain.
+
+# Returns the authorization type or nouser if there is no such user.
+#
+sub GetAuthType
+{
+ my $domain = shift;
+ my $user = shift;
+
+ Debug("GetAuthType( $domain, $user ) \n");
+ my $proname = &propath($domain, $user);
+ my $passwdfile = "$proname/passwd";
+ if( -e $passwdfile ) {
+ my $pf = IO::File->new($passwdfile);
+ my $realpassword = <$pf>;
+ chomp($realpassword);
+ Debug("Password info = $realpassword\n");
+ my ($authtype, $contentpwd) = split(/:/, $realpassword);
+ Debug("Authtype = $authtype, content = $contentpwd\n");
+ my $availinfo = '';
+ if($authtype eq 'krb4' or $authtype eq 'krb5') {
+ $availinfo = $contentpwd;
+ }
+
+ return "$authtype:$availinfo";
+ }
+ else {
+ Debug("Returning nouser");
+ return "nouser";
+ }
+}
+
+sub addline {
+ my ($fname,$hostid,$ip,$newline)=@_;
+ my $contents;
+ my $found=0;
+ my $expr='^'.$hostid.':'.$ip.':';
+ $expr =~ s/\./\\\./g;
+ my $sh;
+ if ($sh=IO::File->new("$fname.subscription")) {
+ while (my $subline=<$sh>) {
+ if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
+ }
+ $sh->close();
+ }
+ $sh=IO::File->new(">$fname.subscription");
+ if ($contents) { print $sh $contents; }
+ if ($newline) { print $sh $newline; }
+ $sh->close();
+ return $found;
+}
+
+sub getchat {
+ my ($cdom,$cname,$udom,$uname)=@_;
+ my %hash;
+ my $proname=&propath($cdom,$cname);
+ my @entries=();
+ if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
+ &GDBM_READER(),0640)) {
+ @entries=map { $_.':'.$hash{$_} } sort keys %hash;
+ untie %hash;
+ }
+ my @participants=();
+ my $cutoff=time-60;
+ if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
+ &GDBM_WRCREAT(),0640)) {
+ $hash{$uname.':'.$udom}=time;
+ foreach (sort keys %hash) {
+ if ($hash{$_}>$cutoff) {
+ $participants[$#participants+1]='active_participant:'.$_;
+ }
+ }
+ untie %hash;
+ }
+ return (@participants,@entries);
+}
+
+sub chatadd {
+ my ($cdom,$cname,$newchat)=@_;
+ my %hash;
+ my $proname=&propath($cdom,$cname);
+ my @entries=();
+ my $time=time;
+ if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
+ &GDBM_WRCREAT(),0640)) {
+ @entries=map { $_.':'.$hash{$_} } sort keys %hash;
+ my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
+ my ($thentime,$idnum)=split(/\_/,$lastid);
+ my $newid=$time.'_000000';
+ if ($thentime==$time) {
+ $idnum=~s/^0+//;
+ $idnum++;
+ $idnum=substr('000000'.$idnum,-6,6);
+ $newid=$time.'_'.$idnum;
+ }
+ $hash{$newid}=$newchat;
+ my $expired=$time-3600;
+ foreach (keys %hash) {
+ my ($thistime)=($_=~/(\d+)\_/);
+ if ($thistime<$expired) {
+ delete $hash{$_};
+ }
+ }
+ untie %hash;
+ }
+ {
+ my $hfh;
+ if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
+ print $hfh "$time:".&unescape($newchat)."\n";
+ }
+ }
+}
+
+sub unsub {
+ my ($fname,$clientip)=@_;
+ my $result;
+ if (unlink("$fname.$clientname")) {
+ $result="ok\n";
+ } else {
+ $result="not_subscribed\n";
+ }
+ if (-e "$fname.subscription") {
+ my $found=&addline($fname,$clientname,$clientip,'');
+ if ($found) { $result="ok\n"; }
+ } else {
+ if ($result != "ok\n") { $result="not_subscribed\n"; }
+ }
+ return $result;
+}
+
+sub currentversion {
+ my $fname=shift;
+ my $version=-1;
+ my $ulsdir='';
+ if ($fname=~/^(.+)\/[^\/]+$/) {
+ $ulsdir=$1;
+ }
+ my ($fnamere1,$fnamere2);
+ # remove version if already specified
+ $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
+ # get the bits that go before and after the version number
+ if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
+ $fnamere1=$1;
+ $fnamere2='.'.$2;
+ }
+ if (-e $fname) { $version=1; }
+ if (-e $ulsdir) {
+ if(-d $ulsdir) {
+ if (opendir(LSDIR,$ulsdir)) {
+ my $ulsfn;
+ while ($ulsfn=readdir(LSDIR)) {
+# see if this is a regular file (ignore links produced earlier)
+ my $thisfile=$ulsdir.'/'.$ulsfn;
+ unless (-l $thisfile) {
+ if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
+ if ($1>$version) { $version=$1; }
+ }
+ }
+ }
+ closedir(LSDIR);
+ $version++;
+ }
+ }
+ }
+ return $version;
+}
+
+sub thisversion {
+ my $fname=shift;
+ my $version=-1;
+ if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
+ $version=$1;
+ }
+ return $version;
+}
+
+sub subscribe {
+ my ($userinput,$clientip)=@_;
+ my $result;
+ my ($cmd,$fname)=split(/:/,$userinput);
+ my $ownership=&ishome($fname);
+ if ($ownership eq 'owner') {
+# explitly asking for the current version?
+ unless (-e $fname) {
+ my $currentversion=¤tversion($fname);
+ if (&thisversion($fname)==$currentversion) {
+ if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
+ my $root=$1;
+ my $extension=$2;
+ symlink($root.'.'.$extension,
+ $root.'.'.$currentversion.'.'.$extension);
+ unless ($extension=~/\.meta$/) {
+ symlink($root.'.'.$extension.'.meta',
+ $root.'.'.$currentversion.'.'.$extension.'.meta');
+ }
+ }
+ }
+ }
+ if (-e $fname) {
+ if (-d $fname) {
+ $result="directory\n";
+ } else {
+ if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
+ my $now=time;
+ my $found=&addline($fname,$clientname,$clientip,
+ "$clientname:$clientip:$now\n");
+ if ($found) { $result="$fname\n"; }
+ # if they were subscribed to only meta data, delete that
+ # subscription, when you subscribe to a file you also get
+ # the metadata
+ unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
+ $fname=~s/\/home\/httpd\/html\/res/raw/;
+ $fname="http://$thisserver/".$fname;
+ $result="$fname\n";
+ }
+ } else {
+ $result="not_found\n";
+ }
+ } else {
+ $result="rejected\n";
+ }
+ return $result;
+}
+
+sub make_passwd_file {
+ my ($uname, $umode,$npass,$passfilename)=@_;
+ my $result="ok\n";
+ if ($umode eq 'krb4' or $umode eq 'krb5') {
+ {
+ my $pf = IO::File->new(">$passfilename");
+ print $pf "$umode:$npass\n";
+ }
+ } elsif ($umode eq 'internal') {
+ my $salt=time;
+ $salt=substr($salt,6,2);
+ my $ncpass=crypt($npass,$salt);
+ {
+ &Debug("Creating internal auth");
+ my $pf = IO::File->new(">$passfilename");
+ print $pf "internal:$ncpass\n";
+ }
+ } elsif ($umode eq 'localauth') {
+ {
+ my $pf = IO::File->new(">$passfilename");
+ print $pf "localauth:$npass\n";
+ }
+ } elsif ($umode eq 'unix') {
+ {
+ my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
+ {
+ &Debug("Executing external: ".$execpath);
+ &Debug("user = ".$uname.", Password =". $npass);
+ my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
+ print $se "$uname\n";
+ print $se "$npass\n";
+ print $se "$npass\n";
+ }
+ my $useraddok = $?;
+ if($useraddok > 0) {
+ &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
+ }
+ my $pf = IO::File->new(">$passfilename");
+ print $pf "unix:\n";
+ }
+ } elsif ($umode eq 'none') {
+ {
+ my $pf = IO::File->new(">$passfilename");
+ print $pf "none:\n";
+ }
+ } else {
+ $result="auth_mode_error\n";
}
+ return $result;
}
+sub sethost {
+ my ($remotereq) = @_;
+ my (undef,$hostid)=split(/:/,$remotereq);
+ if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
+ if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
+ $currenthostid=$hostid;
+ $currentdomainid=$hostdom{$hostid};
+ &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
+ } else {
+ &logthis("Requested host id $hostid not an alias of ".
+ $perlvar{'lonHostID'}." refusing connection");
+ return 'unable_to_set';
+ }
+ return 'ok';
+}
+
+sub version {
+ my ($userinput)=@_;
+ $remoteVERSION=(split(/:/,$userinput))[1];
+ 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;
+}
+
+# ----------------------------------- POD (plain old documentation, CPAN style)
+
+=head1 NAME
+
+lond - "LON Daemon" Server (port "LOND" 5663)
+
+=head1 SYNOPSIS
+
+Usage: B
+
+Should only be run as user=www. This is a command-line script which
+is invoked by B. There is no expectation that a typical user
+will manually start B from the command-line. (In other words,
+DO NOT START B YOURSELF.)
+
+=head1 DESCRIPTION
+
+There are two characteristics associated with the running of B,
+PROCESS MANAGEMENT (starting, stopping, handling child processes)
+and SERVER-SIDE ACTIVITIES (password authentication, user creation,
+subscriptions, etc). These are described in two large
+sections below.
+
+B
+
+Preforker - server who forks first. Runs as a daemon. HUPs.
+Uses IDEA encryption
+
+B forks off children processes that correspond to the other servers
+in the network. Management of these processes can be done at the
+parent process level or the child process level.
+
+B is the location of log messages.
+
+The process management is now explained in terms of linux shell commands,
+subroutines internal to this code, and signal assignments:
+
+=over 4
+
+=item *
+
+PID is stored in B
+
+This is the process id number of the parent B process.
+
+=item *
+
+SIGTERM and SIGINT
+
+Parent signal assignment:
+ $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
+
+Child signal assignment:
+ $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
+(The child dies and a SIGALRM is sent to parent, awaking parent from slumber
+ to restart a new child.)
+
+Command-line invocations:
+ B B<-s> SIGTERM I
+ B B<-s> SIGINT I
+
+Subroutine B:
+ This is only invoked for the B parent I.
+This kills all the children, and then the parent.
+The B file is cleared.
+
+=item *
+
+SIGHUP
+
+Current bug:
+ This signal can only be processed the first time
+on the parent process. Subsequent SIGHUP signals
+have no effect.
+
+Parent signal assignment:
+ $SIG{HUP} = \&HUPSMAN;
+
+Child signal assignment:
+ none (nothing happens)
+
+Command-line invocations:
+ B B<-s> SIGHUP I
+
+Subroutine B:
+ This is only invoked for the B parent I,
+This kills all the children, and then the parent.
+The B file is cleared.
+
+=item *
+
+SIGUSR1
+
+Parent signal assignment:
+ $SIG{USR1} = \&USRMAN;
+
+Child signal assignment:
+ $SIG{USR1}= \&logstatus;
+
+Command-line invocations:
+ B B<-s> SIGUSR1 I
+
+Subroutine B:
+ When invoked for the B parent I,
+SIGUSR1 is sent to all the children, and the status of
+each connection is logged.
+
+=item *
+
+SIGUSR2
+
+Parent Signal assignment:
+ $SIG{USR2} = \&UpdateHosts
+
+Child signal assignment:
+ NONE
+
+
+=item *
+
+SIGCHLD
+
+Parent signal assignment:
+ $SIG{CHLD} = \&REAPER;
+
+Child signal assignment:
+ none
+
+Command-line invocations:
+ B B<-s> SIGCHLD I
+
+Subroutine B:
+ This is only invoked for the B parent I.
+Information pertaining to the child is removed.
+The socket port is cleaned up.
+
+=back
+
+B
+
+Server-side information can be accepted in an encrypted or non-encrypted
+method.
+
+=over 4
+
+=item ping
+
+Query a client in the hosts.tab table; "Are you there?"
+
+=item pong
+
+Respond to a ping query.
+
+=item ekey
+
+Read in encrypted key, make cipher. Respond with a buildkey.
+
+=item load
+
+Respond with CPU load based on a computation upon /proc/loadavg.
+
+=item currentauth
+
+Reply with current authentication information (only over an
+encrypted channel).
+
+=item auth
+
+Only over an encrypted channel, reply as to whether a user's
+authentication information can be validated.
+
+=item passwd
+
+Allow for a password to be set.
+
+=item makeuser
+
+Make a user.
+
+=item passwd
+
+Allow for authentication mechanism and password to be changed.
+
+=item home
+
+Respond to a question "are you the home for a given user?"
+
+=item update
+
+Update contents of a subscribed resource.
+
+=item unsubscribe
+
+The server is unsubscribing from a resource.
+
+=item subscribe
+
+The server is subscribing to a resource.
+
+=item log
+
+Place in B
+
+=item put
+
+stores hash in namespace
+
+=item rolesput
+
+put a role into a user's environment
+
+=item get
+
+returns hash with keys from array
+reference filled in from namespace
+
+=item eget
+
+returns hash with keys from array
+reference filled in from namesp (encrypts the return communication)
+
+=item rolesget
+
+get a role from a user's environment
+
+=item del
+
+deletes keys out of array from namespace
+
+=item keys
+
+returns namespace keys
+
+=item dump
+
+dumps the complete (or key matching regexp) namespace into a hash
+
+=item store
+
+stores hash permanently
+for this url; hashref needs to be given and should be a \%hashname; the
+remaining args aren't required and if they aren't passed or are '' they will
+be derived from the ENV
+
+=item restore
+
+returns a hash for a given url
+
+=item querysend
+
+Tells client about the lonsql process that has been launched in response
+to a sent query.
+
+=item queryreply
+
+Accept information from lonsql and make appropriate storage in temporary
+file space.
+
+=item idput
+
+Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
+for each student, defined perhaps by the institutional Registrar.)
+
+=item idget
+
+Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
+for each student, defined perhaps by the institutional Registrar.)
+
+=item tmpput
+
+Accept and store information in temporary space.
+
+=item tmpget
+
+Send along temporarily stored information.
+
+=item ls
+
+List part of a user's directory.
+
+=item pushtable
+
+Pushes a file in /home/httpd/lonTab directory. Currently limited to:
+hosts.tab and domain.tab. The old file is copied to *.tab.backup but
+must be restored manually in case of a problem with the new table file.
+pushtable requires that the request be encrypted and validated via
+ValidateManager. The form of the command is:
+enc:pushtable tablename \n
+where pushtable, tablename and will be encrypted, but \n is a
+cleartext newline.
+
+=item Hanging up (exit or init)
+
+What to do when a client tells the server that they (the client)
+are leaving the network.
+
+=item unknown command
+
+If B is sent an unknown command (not in the list above),
+it replys to the client "unknown_cmd".
+
+
+=item UNKNOWN CLIENT
+
+If the anti-spoofing algorithm cannot verify the client,
+the client is rejected (with a "refused" message sent
+to the client, and the connection is closed.
+
+=back
+
+=head1 PREREQUISITES
+
+IO::Socket
+IO::File
+Apache::File
+Symbol
+POSIX
+Crypt::IDEA
+LWP::UserAgent()
+GDBM_File
+Authen::Krb4
+Authen::Krb5
+
+=head1 COREQUISITES
+
+=head1 OSNAMES
+linux
+=head1 SCRIPT CATEGORIES
+Server/Process
+=cut