Annotation of loncom/lond, revision 1.151

1.1       albertel    1: #!/usr/bin/perl
                      2: # The LearningOnline Network
                      3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60      www         4: #
1.151   ! albertel    5: # $Id: lond,v 1.150 2003/09/30 10:16:06 foxr Exp $
1.60      www         6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
                     13: # the Free Software Foundation; either version 2 of the License, or
                     14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
                     27: # http://www.lon-capa.org/
                     28: #
1.1       albertel   29: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
1.2       www        30: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
1.6       www        31: # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
1.11      www        32: # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
1.12      harris41   33: # 03/07,05/31 Gerd Kortemeyer
1.20      www        34: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
1.34      www        35: # 12/05,12/13,12/29 Gerd Kortemeyer
1.61      harris41   36: # YEAR=2001
1.36      www        37: # 02/12 Gerd Kortemeyer
1.41      www        38: # 03/24 Gerd Kortemeyer
1.51      www        39: # 05/11,05/28,08/30 Gerd Kortemeyer
1.59      www        40: # 11/26,11/27 Gerd Kortemeyer
1.62      www        41: # 12/22 Gerd Kortemeyer
1.63      www        42: # YEAR=2002
1.65      www        43: # 01/20/02,02/05 Gerd Kortemeyer
1.71      www        44: # 02/05 Guy Albertelli
                     45: # 02/12 Gerd Kortemeyer
1.73      www        46: # 02/19 Matthew Hall
                     47: # 02/25 Gerd Kortemeyer
1.106     foxr       48: # 01/xx/2003 Ron Fox.. Remove preforking.  This makes the general daemon
                     49: #      logic simpler (and there were problems maintaining the preforked
                     50: #      population).  Since the time averaged connection rate is close to zero
                     51: #      because lonc's purpose is to maintain near continuous connnections,
                     52: #      preforking is not really needed.
1.135     foxr       53: # 08/xx/2003 Ron Fox:  Add management requests.  Management requests
                     54: #      will be validated via a call to ValidateManager. At present, this
                     55: #      is done by simple host verification.  In the future we can modify
                     56: #      this function to do a certificate check.
                     57: #      Management functions supported include:
                     58: #       - pushing /home/httpd/lonTabs/hosts.tab
                     59: #       - pushing /home/httpd/lonTabs/domain.tab
1.141     foxr       60: # 09/08/2003 Ron Fox:  Told lond to take care of change logging so we
                     61: #      don't have to remember it:
1.142     www        62: # $Log: lond,v $
1.151   ! albertel   63: # Revision 1.150  2003/09/30 10:16:06  foxr
        !            64: # Added invocation of apachereload in ReloadApache sub.
        !            65: # This completes the addtion of the reinit functionality.
        !            66: #
1.150     foxr       67: # Revision 1.149  2003/09/30 09:44:13  foxr
                     68: # Tested UpdateHosts ability to
                     69: # - Remove live children for hosts that are no longer in the hosts.tab
                     70: # - Remove live children for hosts whose IPs have changed in the hosts.tab
                     71: #
1.149     foxr       72: # Revision 1.148  2003/09/29 10:09:18  foxr
                     73: # Put in logic to reinit lond itself (except for apache reload).  I don't believe
                     74: # this logic works correctly yet, however lond still does everything it used to doso I'll do the commit anyway.
                     75: #
1.148     foxr       76: # Revision 1.147  2003/09/23 11:23:31  foxr
                     77: # Comlplete implementation of reinit functionality.  Must still implement
                     78: # the actual initialization functionality, but the process can now
                     79: # receive the request and either invoke the appropriate internal function or
                     80: # signal the correct lonc.
                     81: #
1.147     foxr       82: # Revision 1.146  2003/09/16 10:28:14  foxr
                     83: # ReinitProcess - decode the process selector and produce the associated pid
                     84: # filename.  Note: While it is possible to test that valid process selectors are
                     85: # handled properly I am not able to test that invalid process selectors produce
                     86: # the appropriate error as lonManage also blocks the use of invalid process selectors.
                     87: #
1.146     foxr       88: # Revision 1.145  2003/09/16 10:13:20  foxr
                     89: # Added ReinitProcess function to oversee the parsing and processing of the
                     90: # reinit:<process> client request.
                     91: #
1.145     foxr       92: # Revision 1.144  2003/09/16 09:47:01  foxr
                     93: # Added skeletal support for SIGUSR2 (update hosts.tab)
                     94: #
1.144     foxr       95: # Revision 1.143  2003/09/15 10:03:52  foxr
                     96: # Completed and tested code for pushfile.
                     97: #
1.143     foxr       98: # Revision 1.142  2003/09/09 20:47:46  www
                     99: # Permanently store chatroom entries in chatroom.log
                    100: #
1.142     www       101: # Revision 1.141  2003/09/08 10:32:07  foxr
                    102: # Added PushFile sub This sub oversees the push of a new configuration table file
                    103: # Currently supported files are:
                    104: # - hosts.tab   (transaction pushfile:hosts:contents)
                    105: # - domain.tab  (transaction pushfile:domain:contents)
                    106: #
1.141     foxr      107: 
1.54      harris41  108: 
1.134     albertel  109: use strict;
1.80      harris41  110: use lib '/home/httpd/lib/perl/';
                    111: use LONCAPA::Configuration;
                    112: 
1.1       albertel  113: use IO::Socket;
                    114: use IO::File;
1.126     albertel  115: #use Apache::File;
1.1       albertel  116: use Symbol;
                    117: use POSIX;
                    118: use Crypt::IDEA;
                    119: use LWP::UserAgent();
1.3       www       120: use GDBM_File;
                    121: use Authen::Krb4;
1.91      albertel  122: use Authen::Krb5;
1.49      albertel  123: use lib '/home/httpd/lib/perl/';
                    124: use localauth;
1.143     foxr      125: use File::Copy;
1.1       albertel  126: 
1.77      foxr      127: my $DEBUG = 0;		       # Non zero to enable debug log entries.
                    128: 
1.57      www       129: my $status='';
                    130: my $lastlog='';
                    131: 
1.151   ! albertel  132: my $VERSION='$Revision: 1.150 $'; #' stupid emacs
1.121     albertel  133: my $remoteVERSION;
1.115     albertel  134: my $currenthostid;
                    135: my $currentdomainid;
1.134     albertel  136: 
                    137: my $client;
1.140     foxr      138: my $clientip;
                    139: 
1.134     albertel  140: my $server;
                    141: my $thisserver;
                    142: 
                    143: my %hostid;
                    144: my %hostdom;
                    145: my %hostip;
1.141     foxr      146: my %perlvar;			# Will have the apache conf defined perl vars.
1.134     albertel  147: 
1.96      foxr      148: #
                    149: #  The array below are password error strings."
                    150: #
1.97      foxr      151: my $lastpwderror    = 13;		# Largest error number from lcpasswd.
1.96      foxr      152: my @passwderrors = ("ok",
                    153: 		   "lcpasswd must be run as user 'www'",
                    154: 		   "lcpasswd got incorrect number of arguments",
                    155: 		   "lcpasswd did not get the right nubmer of input text lines",
                    156: 		   "lcpasswd too many simultaneous pwd changes in progress",
                    157: 		   "lcpasswd User does not exist.",
                    158: 		   "lcpasswd Incorrect current passwd",
                    159: 		   "lcpasswd Unable to su to root.",
                    160: 		   "lcpasswd Cannot set new passwd.",
                    161: 		   "lcpasswd Username has invalid characters",
1.97      foxr      162: 		   "lcpasswd Invalid characters in password",
                    163: 		    "11", "12",
                    164: 		    "lcpasswd Password mismatch");
                    165: 
                    166: 
                    167: #  The array below are lcuseradd error strings.:
                    168: 
                    169: my $lastadderror = 13;
                    170: my @adderrors    = ("ok",
                    171: 		    "User ID mismatch, lcuseradd must run as user www",
                    172: 		    "lcuseradd Incorrect number of command line parameters must be 3",
                    173: 		    "lcuseradd Incorrect number of stdinput lines, must be 3",
                    174: 		    "lcuseradd Too many other simultaneous pwd changes in progress",
                    175: 		    "lcuseradd User does not exist",
                    176: 		    "lcuseradd Unabel to mak ewww member of users's group",
                    177: 		    "lcuseradd Unable to su to root",
                    178: 		    "lcuseradd Unable to set password",
                    179: 		    "lcuseradd Usrname has invbalid charcters",
                    180: 		    "lcuseradd Password has an invalid character",
                    181: 		    "lcuseradd User already exists",
                    182: 		    "lcuseradd Could not add user.",
                    183: 		    "lcuseradd Password mismatch");
                    184: 
1.96      foxr      185: 
                    186: #
1.140     foxr      187: #   GetCertificate: Given a transaction that requires a certificate,
                    188: #   this function will extract the certificate from the transaction
                    189: #   request.  Note that at this point, the only concept of a certificate
                    190: #   is the hostname to which we are connected.
                    191: #
                    192: #   Parameter:
                    193: #      request   - The request sent by our client (this parameterization may
                    194: #                  need to change when we really use a certificate granting
                    195: #                  authority.
                    196: #
                    197: sub GetCertificate {
                    198:     my $request = shift;
                    199: 
                    200:     return $clientip;
                    201: }
                    202: 
                    203: 
                    204: #
                    205: #  ValidManager: Determines if a given certificate represents a valid manager.
                    206: #                in this primitive implementation, the 'certificate' is
                    207: #                just the connecting loncapa client name.  This is checked
                    208: #                against a valid client list in the configuration.
                    209: #
                    210: #                  
                    211: sub ValidManager {
                    212:     my $certificate = shift; 
                    213: 
                    214:     my $hostentry   = $hostid{$certificate};
                    215:     if ($hostentry ne undef) {
                    216: 	&logthis('<font color="yellow">Authenticating manager'.
                    217: 		 " $hostentry</font>");
                    218: 	return 1;
                    219:     } else {
                    220: 	&logthis('<font color="red"> Failed manager authentication '.
                    221: 		 "$certificate </font>");
                    222:     }
                    223: }
                    224: #
1.143     foxr      225: #  CopyFile:  Called as part of the process of installing a 
                    226: #             new configuration file.  This function copies an existing
                    227: #             file to a backup file.
                    228: # Parameters:
                    229: #     oldfile  - Name of the file to backup.
                    230: #     newfile  - Name of the backup file.
                    231: # Return:
                    232: #     0   - Failure (errno has failure reason).
                    233: #     1   - Success.
                    234: #
                    235: sub CopyFile {
                    236:     my $oldfile = shift;
                    237:     my $newfile = shift;
                    238: 
                    239:     #  The file must exist:
                    240: 
                    241:     if(-e $oldfile) {
                    242: 
                    243: 	 # Read the old file.
                    244: 
                    245: 	my $oldfh = IO::File->new("< $oldfile");
                    246: 	if(!$oldfh) {
                    247: 	    return 0;
                    248: 	}
                    249: 	my @contents = <$oldfh>;  # Suck in the entire file.
                    250: 
                    251: 	# write the backup file:
                    252: 
                    253: 	my $newfh = IO::File->new("> $newfile");
                    254: 	if(!(defined $newfh)){
                    255: 	    return 0;
                    256: 	}
                    257: 	my $lines = scalar @contents;
                    258: 	for (my $i =0; $i < $lines; $i++) {
                    259: 	    print $newfh ($contents[$i]);
                    260: 	}
                    261: 
                    262: 	$oldfh->close;
                    263: 	$newfh->close;
                    264: 
                    265: 	chmod(0660, $newfile);
                    266: 
                    267: 	return 1;
                    268: 	    
                    269:     } else {
                    270: 	return 0;
                    271:     }
                    272: }
                    273: 
                    274: #
                    275: #   InstallFile: Called to install an administrative file:
                    276: #       - The file is created with <name>.tmp
                    277: #       - The <name>.tmp file is then mv'd to <name>
                    278: #   This lugubrious procedure is done to ensure that we are never without
                    279: #   a valid, even if dated, version of the file regardless of who crashes
                    280: #   and when the crash occurs.
                    281: #
                    282: #  Parameters:
                    283: #       Name of the file
                    284: #       File Contents.
                    285: #  Return:
                    286: #      nonzero - success.
                    287: #      0       - failure and $! has an errno.
                    288: #
                    289: sub InstallFile {
                    290:     my $Filename = shift;
                    291:     my $Contents = shift;
                    292:     my $TempFile = $Filename.".tmp";
                    293: 
                    294:     #  Open the file for write:
                    295: 
                    296:     my $fh = IO::File->new("> $TempFile"); # Write to temp.
                    297:     if(!(defined $fh)) {
                    298: 	&logthis('<font color="red"> Unable to create '.$TempFile."</font>");
                    299: 	return 0;
                    300:     }
                    301:     #  write the contents of the file:
                    302: 
                    303:     print $fh ($Contents); 
                    304:     $fh->close;			# In case we ever have a filesystem w. locking
                    305: 
                    306:     chmod(0660, $TempFile);
                    307: 
                    308:     # Now we can move install the file in position.
                    309:     
                    310:     move($TempFile, $Filename);
                    311: 
                    312:     return 1;
                    313: }
                    314: 
                    315: #
1.141     foxr      316: #   PushFile:  Called to do an administrative push of a file.
                    317: #              - Ensure the file being pushed is one we support.
                    318: #              - Backup the old file to <filename.saved>
                    319: #              - Separate the contents of the new file out from the
                    320: #                rest of the request.
                    321: #              - Write the new file.
                    322: #  Parameter:
                    323: #     Request - The entire user request.  This consists of a : separated
                    324: #               string pushfile:tablename:contents.
                    325: #     NOTE:  The contents may have :'s in it as well making things a bit
                    326: #            more interesting... but not much.
                    327: #  Returns:
                    328: #     String to send to client ("ok" or "refused" if bad file).
                    329: #
                    330: sub PushFile {
                    331:     my $request = shift;    
                    332:     my ($command, $filename, $contents) = split(":", $request, 3);
                    333:     
                    334:     #  At this point in time, pushes for only the following tables are
                    335:     #  supported:
                    336:     #   hosts.tab  ($filename eq host).
                    337:     #   domain.tab ($filename eq domain).
                    338:     # Construct the destination filename or reject the request.
                    339:     #
                    340:     # lonManage is supposed to ensure this, however this session could be
                    341:     # part of some elaborate spoof that managed somehow to authenticate.
                    342:     #
                    343: 
                    344:     my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
                    345:     if ($filename eq "host") {
                    346: 	$tablefile .= "hosts.tab";
                    347:     } elsif ($filename eq "domain") {
                    348: 	$tablefile .= "domain.tab";
                    349:     } else {
                    350: 	return "refused";
                    351:     }
                    352:     #
                    353:     # >copy< the old table to the backup table
                    354:     #        don't rename in case system crashes/reboots etc. in the time
                    355:     #        window between a rename and write.
                    356:     #
                    357:     my $backupfile = $tablefile;
                    358:     $backupfile    =~ s/\.tab$/.old/;
1.143     foxr      359:     if(!CopyFile($tablefile, $backupfile)) {
                    360: 	&logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
                    361: 	return "error:$!";
                    362:     }
1.141     foxr      363:     &logthis('<font color="green"> Pushfile: backed up '
                    364: 	    .$tablefile." to $backupfile</font>");
                    365:     
                    366:     #  Install the new file:
                    367: 
1.143     foxr      368:     if(!InstallFile($tablefile, $contents)) {
                    369: 	&logthis('<font color="red"> Pushfile: unable to install '
1.145     foxr      370: 	 .$tablefile." $! </font>");
1.143     foxr      371: 	return "error:$!";
                    372:     }
                    373:     else {
                    374: 	&logthis('<font color="green"> Installed new '.$tablefile
                    375: 		 ."</font>");
                    376: 
                    377:     }
                    378: 
1.141     foxr      379: 
                    380:     #  Indicate success:
                    381:  
                    382:     return "ok";
                    383: 
                    384: }
1.145     foxr      385: 
                    386: #
                    387: #  Called to re-init either lonc or lond.
                    388: #
                    389: #  Parameters:
                    390: #    request   - The full request by the client.  This is of the form
                    391: #                reinit:<process>  
                    392: #                where <process> is allowed to be either of 
                    393: #                lonc or lond
                    394: #
                    395: #  Returns:
                    396: #     The string to be sent back to the client either:
                    397: #   ok         - Everything worked just fine.
                    398: #   error:why  - There was a failure and why describes the reason.
                    399: #
                    400: #
                    401: sub ReinitProcess {
                    402:     my $request = shift;
                    403: 
1.146     foxr      404: 
                    405:     # separate the request (reinit) from the process identifier and
                    406:     # validate it producing the name of the .pid file for the process.
                    407:     #
                    408:     #
                    409:     my ($junk, $process) = split(":", $request);
1.147     foxr      410:     my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146     foxr      411:     if($process eq 'lonc') {
                    412: 	$processpidfile = $processpidfile."lonc.pid";
1.147     foxr      413: 	if (!open(PIDFILE, "< $processpidfile")) {
                    414: 	    return "error:Open failed for $processpidfile";
                    415: 	}
                    416: 	my $loncpid = <PIDFILE>;
                    417: 	close(PIDFILE);
                    418: 	logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
                    419: 		."</font>");
                    420: 	kill("USR2", $loncpid);
1.146     foxr      421:     } elsif ($process eq 'lond') {
1.147     foxr      422: 	logthis('<font color="red"> Reinitializing self (lond) </font>');
                    423: 	&UpdateHosts;			# Lond is us!!
1.146     foxr      424:     } else {
                    425: 	&logthis('<font color="yellow" Invalid reinit request for '.$process
                    426: 		 ."</font>");
                    427: 	return "error:Invalid process identifier $process";
                    428:     }
1.145     foxr      429:     return 'ok';
                    430: }
                    431: 
1.141     foxr      432: #
1.96      foxr      433: #  Convert an error return code from lcpasswd to a string value.
                    434: #
                    435: sub lcpasswdstrerror {
                    436:     my $ErrorCode = shift;
1.97      foxr      437:     if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96      foxr      438: 	return "lcpasswd Unrecognized error return value ".$ErrorCode;
                    439:     } else {
1.98      foxr      440: 	return $passwderrors[$ErrorCode];
1.96      foxr      441:     }
                    442: }
                    443: 
1.97      foxr      444: #
                    445: # Convert an error return code from lcuseradd to a string value:
                    446: #
                    447: sub lcuseraddstrerror {
                    448:     my $ErrorCode = shift;
                    449:     if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
                    450: 	return "lcuseradd - Unrecognized error code: ".$ErrorCode;
                    451:     } else {
1.98      foxr      452: 	return $adderrors[$ErrorCode];
1.97      foxr      453:     }
                    454: }
                    455: 
1.23      harris41  456: # grabs exception and records it to log before exiting
                    457: sub catchexception {
1.27      albertel  458:     my ($error)=@_;
1.25      www       459:     $SIG{'QUIT'}='DEFAULT';
                    460:     $SIG{__DIE__}='DEFAULT';
1.23      harris41  461:     &logthis("<font color=red>CRITICAL: "
1.134     albertel  462:      ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27      albertel  463:      ."a crash with this error msg->[$error]</font>");
1.57      www       464:     &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27      albertel  465:     if ($client) { print $client "error: $error\n"; }
1.59      www       466:     $server->close();
1.27      albertel  467:     die($error);
1.23      harris41  468: }
                    469: 
1.63      www       470: sub timeout {
                    471:     &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
                    472:     &catchexception('Timeout');
                    473: }
1.22      harris41  474: # -------------------------------- Set signal handlers to record abnormal exits
                    475: 
                    476: $SIG{'QUIT'}=\&catchexception;
                    477: $SIG{__DIE__}=\&catchexception;
                    478: 
1.81      matthew   479: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95      harris41  480: &status("Read loncapa.conf and loncapa_apache.conf");
                    481: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141     foxr      482: %perlvar=%{$perlvarref};
1.80      harris41  483: undef $perlvarref;
1.19      www       484: 
1.35      harris41  485: # ----------------------------- Make sure this process is running from user=www
                    486: my $wwwid=getpwnam('www');
                    487: if ($wwwid!=$<) {
1.134     albertel  488:    my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
                    489:    my $subj="LON: $currenthostid User ID mismatch";
1.37      harris41  490:    system("echo 'User ID mismatch.  lond must be run as user www.' |\
1.35      harris41  491:  mailto $emailto -s '$subj' > /dev/null");
                    492:    exit 1;
                    493: }
                    494: 
1.19      www       495: # --------------------------------------------- Check if other instance running
                    496: 
                    497: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
                    498: 
                    499: if (-e $pidfile) {
                    500:    my $lfh=IO::File->new("$pidfile");
                    501:    my $pide=<$lfh>;
                    502:    chomp($pide);
1.29      harris41  503:    if (kill 0 => $pide) { die "already running"; }
1.19      www       504: }
1.1       albertel  505: 
                    506: # ------------------------------------------------------------- Read hosts file
                    507: 
                    508: 
                    509: 
                    510: # establish SERVER socket, bind and listen.
                    511: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
                    512:                                 Type      => SOCK_STREAM,
                    513:                                 Proto     => 'tcp',
                    514:                                 Reuse     => 1,
                    515:                                 Listen    => 10 )
1.29      harris41  516:   or die "making socket: $@\n";
1.1       albertel  517: 
                    518: # --------------------------------------------------------- Do global variables
                    519: 
                    520: # global variables
                    521: 
1.134     albertel  522: my %children               = ();       # keys are current child process IDs
                    523: my $children               = 0;        # current number of children
1.1       albertel  524: 
                    525: sub REAPER {                        # takes care of dead children
                    526:     $SIG{CHLD} = \&REAPER;
                    527:     my $pid = wait;
1.67      albertel  528:     if (defined($children{$pid})) {
                    529: 	&logthis("Child $pid died");
                    530: 	$children --;
                    531: 	delete $children{$pid};
                    532:     } else {
                    533: 	&logthis("Unknown Child $pid died");
                    534:     }
1.1       albertel  535: }
                    536: 
                    537: sub HUNTSMAN {                      # signal handler for SIGINT
                    538:     local($SIG{CHLD}) = 'IGNORE';   # we're going to kill our children
                    539:     kill 'INT' => keys %children;
1.59      www       540:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1       albertel  541:     my $execdir=$perlvar{'lonDaemons'};
                    542:     unlink("$execdir/logs/lond.pid");
1.9       www       543:     &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.1       albertel  544:     exit;                           # clean up with dignity
                    545: }
                    546: 
                    547: sub HUPSMAN {                      # signal handler for SIGHUP
                    548:     local($SIG{CHLD}) = 'IGNORE';  # we're going to kill our children
                    549:     kill 'INT' => keys %children;
1.59      www       550:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9       www       551:     &logthis("<font color=red>CRITICAL: Restarting</font>");
1.134     albertel  552:     my $execdir=$perlvar{'lonDaemons'};
1.30      harris41  553:     unlink("$execdir/logs/lond.pid");
1.1       albertel  554:     exec("$execdir/lond");         # here we go again
                    555: }
                    556: 
1.144     foxr      557: #
1.148     foxr      558: #    Kill off hashes that describe the host table prior to re-reading it.
                    559: #    Hashes affected are:
                    560: #       %hostid, %hostdom %hostip
                    561: #
                    562: sub KillHostHashes {
                    563:     foreach my $key (keys %hostid) {
                    564: 	delete $hostid{$key};
                    565:     }
                    566:     foreach my $key (keys %hostdom) {
                    567: 	delete $hostdom{$key};
                    568:     }
                    569:     foreach my $key (keys %hostip) {
                    570: 	delete $hostip{$key};
                    571:     }
                    572: }
                    573: #
                    574: #   Read in the host table from file and distribute it into the various hashes:
                    575: #
                    576: #    - %hostid  -  Indexed by IP, the loncapa hostname.
                    577: #    - %hostdom -  Indexed by  loncapa hostname, the domain.
                    578: #    - %hostip  -  Indexed by hostid, the Ip address of the host.
                    579: sub ReadHostTable {
                    580: 
                    581:     open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
                    582:     
                    583:     while (my $configline=<CONFIG>) {
                    584: 	my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
                    585: 	chomp($ip); $ip=~s/\D+$//;
                    586: 	$hostid{$ip}=$id;
                    587: 	$hostdom{$id}=$domain;
                    588: 	$hostip{$id}=$ip;
                    589: 	if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
                    590:     }
                    591:     close(CONFIG);
                    592: }
                    593: #
                    594: #  Reload the Apache daemon's state.
1.150     foxr      595: #  This is done by invoking /home/httpd/perl/apachereload
                    596: #  a setuid perl script that can be root for us to do this job.
1.148     foxr      597: #
                    598: sub ReloadApache {
1.150     foxr      599:     my $execdir = $perlvar{'lonDaemons'};
                    600:     my $script  = $execdir."/apachereload";
                    601:     system($script);
1.148     foxr      602: }
                    603: 
                    604: #
1.144     foxr      605: #   Called in response to a USR2 signal.
                    606: #   - Reread hosts.tab
                    607: #   - All children connected to hosts that were removed from hosts.tab
                    608: #     are killed via SIGINT
                    609: #   - All children connected to previously existing hosts are sent SIGUSR1
                    610: #   - Our internal hosts hash is updated to reflect the new contents of
                    611: #     hosts.tab causing connections from hosts added to hosts.tab to
                    612: #     now be honored.
                    613: #
                    614: sub UpdateHosts {
1.147     foxr      615:     logthis('<font color="blue"> Updating connections </font>');
1.148     foxr      616:     #
                    617:     #  The %children hash has the set of IP's we currently have children
                    618:     #  on.  These need to be matched against records in the hosts.tab
                    619:     #  Any ip's no longer in the table get killed off they correspond to
                    620:     #  either dropped or changed hosts.  Note that the re-read of the table
                    621:     #  will take care of new and changed hosts as connections come into being.
                    622: 
                    623: 
                    624:     KillHostHashes;
                    625:     ReadHostTable;
                    626: 
                    627:     foreach my $child (keys %children) {
                    628: 	my $childip = $children{$child};
                    629: 	if(!$hostid{$childip}) {
1.149     foxr      630: 	    logthis('<font color="blue"> UpdateHosts killing child '
                    631: 		    ." $child for ip $childip </font>");
1.148     foxr      632: 	    kill('INT', $child);
1.149     foxr      633: 	} else {
                    634: 	    logthis('<font color="green"> keeping child for ip '
                    635: 		    ." $childip (pid=$child) </font>");
1.148     foxr      636: 	}
                    637:     }
                    638:     ReloadApache;
1.144     foxr      639: }
                    640: 
1.148     foxr      641: 
1.57      www       642: sub checkchildren {
                    643:     &initnewstatus();
                    644:     &logstatus();
                    645:     &logthis('Going to check on the children');
1.134     albertel  646:     my $docdir=$perlvar{'lonDocRoot'};
1.61      harris41  647:     foreach (sort keys %children) {
1.57      www       648: 	sleep 1;
                    649:         unless (kill 'USR1' => $_) {
                    650: 	    &logthis ('Child '.$_.' is dead');
                    651:             &logstatus($$.' is dead');
                    652:         } 
1.61      harris41  653:     }
1.63      www       654:     sleep 5;
1.113     albertel  655:     $SIG{ALRM} = sub { die "timeout" };
                    656:     $SIG{__DIE__} = 'DEFAULT';
1.63      www       657:     foreach (sort keys %children) {
                    658:         unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113     albertel  659:           eval {
                    660:             alarm(300);
1.63      www       661: 	    &logthis('Child '.$_.' did not respond');
1.67      albertel  662: 	    kill 9 => $_;
1.131     albertel  663: 	    #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
                    664: 	    #$subj="LON: $currenthostid killed lond process $_";
                    665: 	    #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
                    666: 	    #$execdir=$perlvar{'lonDaemons'};
                    667: 	    #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.113     albertel  668: 	    alarm(0);
                    669: 	  }
1.63      www       670:         }
                    671:     }
1.113     albertel  672:     $SIG{ALRM} = 'DEFAULT';
                    673:     $SIG{__DIE__} = \&cathcexception;
1.57      www       674: }
                    675: 
1.1       albertel  676: # --------------------------------------------------------------------- Logging
                    677: 
                    678: sub logthis {
                    679:     my $message=shift;
                    680:     my $execdir=$perlvar{'lonDaemons'};
                    681:     my $fh=IO::File->new(">>$execdir/logs/lond.log");
                    682:     my $now=time;
                    683:     my $local=localtime($now);
1.58      www       684:     $lastlog=$local.': '.$message;
1.1       albertel  685:     print $fh "$local ($$): $message\n";
                    686: }
                    687: 
1.77      foxr      688: # ------------------------- Conditional log if $DEBUG true.
                    689: sub Debug {
                    690:     my $message = shift;
                    691:     if($DEBUG) {
                    692: 	&logthis($message);
                    693:     }
                    694: }
1.57      www       695: # ------------------------------------------------------------------ Log status
                    696: 
                    697: sub logstatus {
                    698:     my $docdir=$perlvar{'lonDocRoot'};
1.63      www       699:     {
1.57      www       700:     my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
1.115     albertel  701:     print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
1.63      www       702:     $fh->close();
                    703:     }
                    704:     {
                    705: 	my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
                    706:         print $fh $status."\n".$lastlog."\n".time;
                    707:         $fh->close();
                    708:     }
1.57      www       709: }
                    710: 
                    711: sub initnewstatus {
                    712:     my $docdir=$perlvar{'lonDocRoot'};
                    713:     my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
                    714:     my $now=time;
                    715:     my $local=localtime($now);
                    716:     print $fh "LOND status $local - parent $$\n\n";
1.64      www       717:     opendir(DIR,"$docdir/lon-status/londchld");
1.134     albertel  718:     while (my $filename=readdir(DIR)) {
1.64      www       719:         unlink("$docdir/lon-status/londchld/$filename");
                    720:     }
                    721:     closedir(DIR);
1.57      www       722: }
                    723: 
                    724: # -------------------------------------------------------------- Status setting
                    725: 
                    726: sub status {
                    727:     my $what=shift;
                    728:     my $now=time;
                    729:     my $local=localtime($now);
                    730:     $status=$local.': '.$what;
1.103     www       731:     $0='lond: '.$what.' '.$local;
1.57      www       732: }
1.11      www       733: 
                    734: # -------------------------------------------------------- Escape Special Chars
                    735: 
                    736: sub escape {
                    737:     my $str=shift;
                    738:     $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
                    739:     return $str;
                    740: }
                    741: 
                    742: # ----------------------------------------------------- Un-Escape Special Chars
                    743: 
                    744: sub unescape {
                    745:     my $str=shift;
                    746:     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
                    747:     return $str;
                    748: }
                    749: 
1.1       albertel  750: # ----------------------------------------------------------- Send USR1 to lonc
                    751: 
                    752: sub reconlonc {
                    753:     my $peerfile=shift;
                    754:     &logthis("Trying to reconnect for $peerfile");
                    755:     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
                    756:     if (my $fh=IO::File->new("$loncfile")) {
                    757: 	my $loncpid=<$fh>;
                    758:         chomp($loncpid);
                    759:         if (kill 0 => $loncpid) {
                    760: 	    &logthis("lonc at pid $loncpid responding, sending USR1");
                    761:             kill USR1 => $loncpid;
                    762:         } else {
1.9       www       763: 	    &logthis(
                    764:               "<font color=red>CRITICAL: "
                    765:              ."lonc at pid $loncpid not responding, giving up</font>");
1.1       albertel  766:         }
                    767:     } else {
1.9       www       768:       &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1       albertel  769:     }
                    770: }
                    771: 
                    772: # -------------------------------------------------- Non-critical communication
1.11      www       773: 
1.1       albertel  774: sub subreply {
                    775:     my ($cmd,$server)=@_;
                    776:     my $peerfile="$perlvar{'lonSockDir'}/$server";
                    777:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                    778:                                       Type    => SOCK_STREAM,
                    779:                                       Timeout => 10)
                    780:        or return "con_lost";
                    781:     print $sclient "$cmd\n";
                    782:     my $answer=<$sclient>;
                    783:     chomp($answer);
                    784:     if (!$answer) { $answer="con_lost"; }
                    785:     return $answer;
                    786: }
                    787: 
                    788: sub reply {
                    789:   my ($cmd,$server)=@_;
                    790:   my $answer;
1.115     albertel  791:   if ($server ne $currenthostid) { 
1.1       albertel  792:     $answer=subreply($cmd,$server);
                    793:     if ($answer eq 'con_lost') {
                    794: 	$answer=subreply("ping",$server);
                    795:         if ($answer ne $server) {
1.115     albertel  796: 	    &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1       albertel  797:            &reconlonc("$perlvar{'lonSockDir'}/$server");
                    798:         }
                    799:         $answer=subreply($cmd,$server);
                    800:     }
                    801:   } else {
                    802:     $answer='self_reply';
                    803:   } 
                    804:   return $answer;
                    805: }
                    806: 
1.13      www       807: # -------------------------------------------------------------- Talk to lonsql
                    808: 
1.12      harris41  809: sub sqlreply {
                    810:     my ($cmd)=@_;
                    811:     my $answer=subsqlreply($cmd);
                    812:     if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
                    813:     return $answer;
                    814: }
                    815: 
                    816: sub subsqlreply {
                    817:     my ($cmd)=@_;
                    818:     my $unixsock="mysqlsock";
                    819:     my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
                    820:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                    821:                                       Type    => SOCK_STREAM,
                    822:                                       Timeout => 10)
                    823:        or return "con_lost";
                    824:     print $sclient "$cmd\n";
                    825:     my $answer=<$sclient>;
                    826:     chomp($answer);
                    827:     if (!$answer) { $answer="con_lost"; }
                    828:     return $answer;
                    829: }
                    830: 
1.1       albertel  831: # -------------------------------------------- Return path to profile directory
1.11      www       832: 
1.1       albertel  833: sub propath {
                    834:     my ($udom,$uname)=@_;
                    835:     $udom=~s/\W//g;
                    836:     $uname=~s/\W//g;
1.16      www       837:     my $subdir=$uname.'__';
1.1       albertel  838:     $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
                    839:     my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
                    840:     return $proname;
                    841: } 
                    842: 
                    843: # --------------------------------------- Is this the home server of an author?
1.11      www       844: 
1.1       albertel  845: sub ishome {
                    846:     my $author=shift;
                    847:     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
                    848:     my ($udom,$uname)=split(/\//,$author);
                    849:     my $proname=propath($udom,$uname);
                    850:     if (-e $proname) {
                    851: 	return 'owner';
                    852:     } else {
                    853:         return 'not_owner';
                    854:     }
                    855: }
                    856: 
                    857: # ======================================================= Continue main program
                    858: # ---------------------------------------------------- Fork once and dissociate
                    859: 
1.134     albertel  860: my $fpid=fork;
1.1       albertel  861: exit if $fpid;
1.29      harris41  862: die "Couldn't fork: $!" unless defined ($fpid);
1.1       albertel  863: 
1.29      harris41  864: POSIX::setsid() or die "Can't start new session: $!";
1.1       albertel  865: 
                    866: # ------------------------------------------------------- Write our PID on disk
                    867: 
1.134     albertel  868: my $execdir=$perlvar{'lonDaemons'};
1.1       albertel  869: open (PIDSAVE,">$execdir/logs/lond.pid");
                    870: print PIDSAVE "$$\n";
                    871: close(PIDSAVE);
1.9       www       872: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57      www       873: &status('Starting');
1.1       albertel  874: 
1.106     foxr      875: 
1.1       albertel  876: 
                    877: # ----------------------------------------------------- Install signal handlers
                    878: 
1.57      www       879: 
1.1       albertel  880: $SIG{CHLD} = \&REAPER;
                    881: $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                    882: $SIG{HUP}  = \&HUPSMAN;
1.57      www       883: $SIG{USR1} = \&checkchildren;
1.144     foxr      884: $SIG{USR2} = \&UpdateHosts;
1.106     foxr      885: 
1.148     foxr      886: #  Read the host hashes:
                    887: 
                    888: ReadHostTable;
1.106     foxr      889: 
                    890: # --------------------------------------------------------------
                    891: #   Accept connections.  When a connection comes in, it is validated
                    892: #   and if good, a child process is created to process transactions
                    893: #   along the connection.
                    894: 
1.1       albertel  895: while (1) {
1.106     foxr      896:     $client = $server->accept() or next;
                    897:     make_new_child($client);
1.1       albertel  898: }
                    899: 
                    900: sub make_new_child {
                    901:     my $pid;
                    902:     my $cipher;
                    903:     my $sigset;
1.106     foxr      904: 
                    905:     $client = shift;
1.1       albertel  906:     &logthis("Attempting to start child");    
                    907:     # block signal for fork
                    908:     $sigset = POSIX::SigSet->new(SIGINT);
                    909:     sigprocmask(SIG_BLOCK, $sigset)
1.29      harris41  910:         or die "Can't block SIGINT for fork: $!\n";
1.134     albertel  911: 
1.29      harris41  912:     die "fork: $!" unless defined ($pid = fork);
1.148     foxr      913: 
                    914:     $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
                    915: 	                               # connection liveness.
                    916: 
                    917:     #
                    918:     #  Figure out who we're talking to so we can record the peer in 
                    919:     #  the pid hash.
                    920:     #
                    921:     my $caller = getpeername($client);
                    922:     my ($port,$iaddr)=unpack_sockaddr_in($caller);
                    923:     $clientip=inet_ntoa($iaddr);
1.1       albertel  924:     
                    925:     if ($pid) {
                    926:         # Parent records the child's birth and returns.
                    927:         sigprocmask(SIG_UNBLOCK, $sigset)
1.29      harris41  928:             or die "Can't unblock SIGINT for fork: $!\n";
1.148     foxr      929:         $children{$pid} = $clientip;
1.1       albertel  930:         $children++;
1.57      www       931:         &status('Started child '.$pid);
1.1       albertel  932:         return;
                    933:     } else {
                    934:         # Child can *not* return from this subroutine.
                    935:         $SIG{INT} = 'DEFAULT';      # make SIGINT kill us as it did before
1.126     albertel  936:         $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns 
                    937:                                 #don't get intercepted
1.57      www       938:         $SIG{USR1}= \&logstatus;
1.63      www       939:         $SIG{ALRM}= \&timeout;
1.57      www       940:         $lastlog='Forked ';
                    941:         $status='Forked';
                    942: 
1.1       albertel  943:         # unblock signals
                    944:         sigprocmask(SIG_UNBLOCK, $sigset)
1.29      harris41  945:             or die "Can't unblock SIGINT for fork: $!\n";
1.13      www       946: 
1.134     albertel  947:         my $tmpsnum=0;
1.91      albertel  948: #---------------------------------------------------- kerberos 5 initialization
                    949:         &Authen::Krb5::init_context();
                    950:         &Authen::Krb5::init_ets();
                    951: 
1.57      www       952:             &status('Accepted connection');
1.1       albertel  953: # =============================================================================
                    954:             # do something with the connection
                    955: # -----------------------------------------------------------------------------
1.148     foxr      956: 	# see if we know client and check for spoof IP by challenge
                    957: 
1.1       albertel  958:             my $clientrec=($hostid{$clientip} ne undef);
1.9       www       959:             &logthis(
1.115     albertel  960: "<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
1.51      www       961:             );
1.57      www       962:             &status("Connecting $clientip ($hostid{$clientip})"); 
1.2       www       963:             my $clientok;
1.1       albertel  964:             if ($clientrec) {
1.57      www       965: 	      &status("Waiting for init from $clientip ($hostid{$clientip})");
1.2       www       966: 	      my $remotereq=<$client>;
1.115     albertel  967:               $remotereq=~s/[^\w:]//g;
                    968:               if ($remotereq =~ /^init/) {
1.121     albertel  969: 		  &sethost("sethost:$perlvar{'lonHostID'}");
1.2       www       970: 		  my $challenge="$$".time;
                    971:                   print $client "$challenge\n";
1.57      www       972:                   &status(
                    973:            "Waiting for challenge reply from $clientip ($hostid{$clientip})"); 
1.2       www       974:                   $remotereq=<$client>;
                    975:                   $remotereq=~s/\W//g;
                    976:                   if ($challenge eq $remotereq) {
                    977: 		      $clientok=1;
                    978:                       print $client "ok\n";
                    979:                   } else {
1.9       www       980: 		      &logthis(
                    981:  "<font color=blue>WARNING: $clientip did not reply challenge</font>");
1.57      www       982:                       &status('No challenge reply '.$clientip);
1.2       www       983:                   }
                    984:               } else {
1.9       www       985: 		  &logthis(
                    986:                     "<font color=blue>WARNING: "
                    987:                    ."$clientip failed to initialize: >$remotereq< </font>");
1.57      www       988:                   &status('No init '.$clientip);
1.2       www       989:               }
                    990: 	    } else {
1.9       www       991:               &logthis(
                    992:  "<font color=blue>WARNING: Unknown client $clientip</font>");
1.57      www       993:               &status('Hung up on '.$clientip);
1.2       www       994:             }
                    995:             if ($clientok) {
1.1       albertel  996: # ---------------- New known client connecting, could mean machine online again
1.75      foxr      997: 
1.115     albertel  998: 		foreach my $id (keys(%hostip)) {
                    999: 		    if ($hostip{$id} ne $clientip ||
                   1000: 		       $hostip{$currenthostid} eq $clientip) {
                   1001: 			# no need to try to do recon's to myself
                   1002: 			next;
                   1003: 		    }
                   1004: 		    &reconlonc("$perlvar{'lonSockDir'}/$id");
                   1005: 		}
                   1006: 		&logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
1.58      www      1007:               &status('Will listen to '.$hostid{$clientip});
1.1       albertel 1008: # ------------------------------------------------------------ Process requests
                   1009:               while (my $userinput=<$client>) {
                   1010:                 chomp($userinput);
1.79      foxr     1011: 		Debug("Request = $userinput\n");
1.57      www      1012:                 &status('Processing '.$hostid{$clientip}.': '.$userinput);
1.1       albertel 1013:                 my $wasenc=0;
1.63      www      1014:                 alarm(120);
1.1       albertel 1015: # ------------------------------------------------------------ See if encrypted
                   1016: 		if ($userinput =~ /^enc/) {
                   1017: 		  if ($cipher) {
                   1018:                     my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
                   1019: 		    $userinput='';
                   1020:                     for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
                   1021:                        $userinput.=
                   1022: 			   $cipher->decrypt(
                   1023:                             pack("H16",substr($encinput,$encidx,16))
                   1024:                            );
                   1025: 		    }
                   1026: 		    $userinput=substr($userinput,0,$cmdlength);
                   1027:                     $wasenc=1;
                   1028: 		}
1.75      foxr     1029: 	      }
                   1030: 	  
1.1       albertel 1031: # ------------------------------------------------------------- Normal commands
                   1032: # ------------------------------------------------------------------------ ping
                   1033: 		   if ($userinput =~ /^ping/) {
1.115     albertel 1034:                        print $client "$currenthostid\n";
1.1       albertel 1035: # ------------------------------------------------------------------------ pong
1.137     foxr     1036: 		   }elsif ($userinput =~ /^pong/) {
1.134     albertel 1037:                        my $reply=&reply("ping",$hostid{$clientip});
1.115     albertel 1038:                        print $client "$currenthostid:$reply\n"; 
1.1       albertel 1039: # ------------------------------------------------------------------------ ekey
                   1040: 		   } elsif ($userinput =~ /^ekey/) {
                   1041:                        my $buildkey=time.$$.int(rand 100000);
                   1042:                        $buildkey=~tr/1-6/A-F/;
                   1043:                        $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1.115     albertel 1044:                        my $key=$currenthostid.$hostid{$clientip};
1.1       albertel 1045:                        $key=~tr/a-z/A-Z/;
                   1046:                        $key=~tr/G-P/0-9/;
                   1047:                        $key=~tr/Q-Z/0-9/;
                   1048:                        $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
                   1049:                        $key=substr($key,0,32);
                   1050:                        my $cipherkey=pack("H32",$key);
                   1051:                        $cipher=new IDEA $cipherkey;
                   1052:                        print $client "$buildkey\n"; 
                   1053: # ------------------------------------------------------------------------ load
                   1054: 		   } elsif ($userinput =~ /^load/) {
                   1055:                        my $loadavg;
                   1056:                        {
                   1057:                           my $loadfile=IO::File->new('/proc/loadavg');
                   1058:                           $loadavg=<$loadfile>;
                   1059:                        }
                   1060:                        $loadavg =~ s/\s.*//g;
1.127     albertel 1061: 		       my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1.1       albertel 1062: 		       print $client "$loadpercent\n";
1.127     albertel 1063: # -------------------------------------------------------------------- userload
                   1064: 		   } elsif ($userinput =~ /^userload/) {
                   1065: 		       my $userloadpercent=&userload();
                   1066: 		       print $client "$userloadpercent\n";
1.137     foxr     1067: 
                   1068: #
                   1069: #        Transactions requiring encryption:
                   1070: #
1.54      harris41 1071: # ----------------------------------------------------------------- currentauth
                   1072: 		   } elsif ($userinput =~ /^currentauth/) {
                   1073: 		     if ($wasenc==1) {
                   1074:                        my ($cmd,$udom,$uname)=split(/:/,$userinput);
1.79      foxr     1075: 		       my $result = GetAuthType($udom, $uname);
1.78      foxr     1076: 		       if($result eq "nouser") {
                   1077: 			   print $client "unknown_user\n";
                   1078: 		       }
                   1079: 		       else {
                   1080: 			   print $client "$result\n"
                   1081: 		       }
1.54      harris41 1082: 		     } else {
                   1083: 		       print $client "refused\n";
                   1084: 		     }
1.137     foxr     1085: #--------------------------------------------------------------------- pushfile
                   1086: 		   } elsif($userinput =~ /^pushfile/) { 
1.140     foxr     1087: 		       if($wasenc == 1) {
                   1088: 			   my $cert = GetCertificate($userinput);
                   1089: 			   if(ValidManager($cert)) {
1.141     foxr     1090: 			       my $reply = PushFile($userinput);
                   1091: 			       print $client "$reply\n";
1.140     foxr     1092: 			   } else {
                   1093: 			       print $client "refused\n";
                   1094: 			   } 
                   1095: 		       } else {
                   1096: 			   print $client "refused\n";
                   1097: 		       }
1.137     foxr     1098: #--------------------------------------------------------------------- reinit
                   1099: 		   } elsif($userinput =~ /^reinit/) {
1.140     foxr     1100: 		       if ($wasenc == 1) {
                   1101: 			   my $cert = GetCertificate($userinput);
                   1102: 			   if(ValidManager($cert)) {
1.146     foxr     1103: 			       chomp($userinput);
1.145     foxr     1104: 			       my $reply = ReinitProcess($userinput);
                   1105: 			       print $client  "$reply\n";
1.140     foxr     1106: 			   } else {
                   1107: 			       print $client "refused\n";
                   1108: 			   }
                   1109: 		       } else {
                   1110: 			   print $client "refused\n";
                   1111: 		       }
1.1       albertel 1112: # ------------------------------------------------------------------------ auth
                   1113:                    } elsif ($userinput =~ /^auth/) {
                   1114: 		     if ($wasenc==1) {
                   1115:                        my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
                   1116:                        chomp($upass);
1.11      www      1117:                        $upass=unescape($upass);
1.1       albertel 1118:                        my $proname=propath($udom,$uname);
                   1119:                        my $passfilename="$proname/passwd";
                   1120:                        if (-e $passfilename) {
                   1121:                           my $pf = IO::File->new($passfilename);
                   1122:                           my $realpasswd=<$pf>;
                   1123:                           chomp($realpasswd);
1.2       www      1124:                           my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
                   1125:                           my $pwdcorrect=0;
                   1126:                           if ($howpwd eq 'internal') {
1.99      foxr     1127: 			      &Debug("Internal auth");
1.2       www      1128: 			      $pwdcorrect=
                   1129: 				  (crypt($upass,$contentpwd) eq $contentpwd);
                   1130:                           } elsif ($howpwd eq 'unix') {
1.99      foxr     1131: 			      &Debug("Unix auth");
                   1132:                               if((getpwnam($uname))[1] eq "") { #no such user!
                   1133: 				  $pwdcorrect = 0;
                   1134: 			      } else {
                   1135: 				  $contentpwd=(getpwnam($uname))[1];
                   1136: 				  my $pwauth_path="/usr/local/sbin/pwauth";
                   1137: 				  unless ($contentpwd eq 'x') {
                   1138: 				      $pwdcorrect=
                   1139: 					  (crypt($upass,$contentpwd) eq 
                   1140: 					   $contentpwd);
                   1141: 				  }
                   1142: 		  
1.52      harris41 1143: 			      elsif (-e $pwauth_path) {
                   1144: 				  open PWAUTH, "|$pwauth_path" or
                   1145: 				      die "Cannot invoke authentication";
                   1146: 				  print PWAUTH "$uname\n$upass\n";
                   1147: 				  close PWAUTH;
                   1148: 				  $pwdcorrect=!$?;
1.99      foxr     1149: 			      }
1.52      harris41 1150: 			      }
1.3       www      1151:                           } elsif ($howpwd eq 'krb4') {
1.134     albertel 1152:                               my $null=pack("C",0);
1.104     matthew  1153:                               unless ($upass=~/$null/) {
                   1154:                                   my $krb4_error = &Authen::Krb4::get_pw_in_tkt
                   1155:                                       ($uname,"",$contentpwd,'krbtgt',
                   1156:                                        $contentpwd,1,$upass);
                   1157:                                   if (!$krb4_error) {
                   1158:                                       $pwdcorrect = 1;
                   1159:                                   } else { 
                   1160:                                       $pwdcorrect=0; 
                   1161:                                       # log error if it is not a bad password
                   1162:                                       if ($krb4_error != 62) {
                   1163:        &logthis('krb4:'.$uname.','.$contentpwd.','.
                   1164:                 &Authen::Krb4::get_err_txt($Authen::Krb4::error));
                   1165:                                       }
                   1166:                                   }
                   1167:                               }
1.91      albertel 1168:                           } elsif ($howpwd eq 'krb5') {
1.134     albertel 1169: 			      my $null=pack("C",0);
1.91      albertel 1170: 			      unless ($upass=~/$null/) {
                   1171: 				  my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
                   1172: 				  my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
                   1173: 				  my $krbserver=&Authen::Krb5::parse_name($krbservice);
                   1174: 				  my $credentials=&Authen::Krb5::cc_default();
                   1175: 				  $credentials->initialize($krbclient);
                   1176: 				  my $krbreturn = 
                   1177: 				    &Authen::Krb5::get_in_tkt_with_password(
                   1178: 				     $krbclient,$krbserver,$upass,$credentials);
1.92      albertel 1179: #				  unless ($krbreturn) {
                   1180: #				      &logthis("Krb5 Error: ".
                   1181: #					       &Authen::Krb5::error());
                   1182: #				  }
1.91      albertel 1183: 				  $pwdcorrect = ($krbreturn == 1);
                   1184: 			   } else { $pwdcorrect=0; }
1.50      albertel 1185:                           } elsif ($howpwd eq 'localauth') {
1.49      albertel 1186: 			    $pwdcorrect=&localauth::localauth($uname,$upass,
                   1187: 							      $contentpwd);
                   1188: 			  }
1.2       www      1189:                           if ($pwdcorrect) {
1.1       albertel 1190:                              print $client "authorized\n";
                   1191:                           } else {
                   1192:                              print $client "non_authorized\n";
                   1193:                           }  
                   1194: 		       } else {
                   1195:                           print $client "unknown_user\n";
                   1196:                        }
                   1197: 		     } else {
                   1198: 		       print $client "refused\n";
                   1199: 		     }
                   1200: # ---------------------------------------------------------------------- passwd
                   1201:                    } elsif ($userinput =~ /^passwd/) {
                   1202: 		     if ($wasenc==1) {
                   1203:                        my 
                   1204:                        ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
                   1205:                        chomp($npass);
1.32      www      1206:                        $upass=&unescape($upass);
                   1207:                        $npass=&unescape($npass);
1.98      foxr     1208: 		       &Debug("Trying to change password for $uname");
1.72      matthew  1209: 		       my $proname=propath($udom,$uname);
1.1       albertel 1210:                        my $passfilename="$proname/passwd";
                   1211:                        if (-e $passfilename) {
                   1212: 			   my $realpasswd;
                   1213:                           { my $pf = IO::File->new($passfilename);
                   1214: 			    $realpasswd=<$pf>; }
                   1215:                           chomp($realpasswd);
1.2       www      1216:                           my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
                   1217:                           if ($howpwd eq 'internal') {
1.98      foxr     1218: 			   &Debug("internal auth");
1.2       www      1219: 			   if (crypt($upass,$contentpwd) eq $contentpwd) {
                   1220: 			     my $salt=time;
                   1221:                              $salt=substr($salt,6,2);
                   1222: 			     my $ncpass=crypt($npass,$salt);
1.139     albertel 1223:                              {
                   1224: 				 my $pf;
                   1225: 				 if ($pf = IO::File->new(">$passfilename")) {
                   1226: 				     print $pf "internal:$ncpass\n";
                   1227: 				     &logthis("Result of password change for $uname: pwchange_success");
                   1228: 				     print $client "ok\n";
                   1229: 				 } else {
                   1230: 				     &logthis("Unable to open $uname passwd to change password");
                   1231: 				     print $client "non_authorized\n";
                   1232: 				 }
                   1233: 			     }             
                   1234: 			     
1.2       www      1235:                            } else {
                   1236:                              print $client "non_authorized\n";
                   1237:                            }
1.72      matthew  1238:                           } elsif ($howpwd eq 'unix') {
                   1239: 			      # Unix means we have to access /etc/password
                   1240: 			      # one way or another.
                   1241: 			      # First: Make sure the current password is
                   1242: 			      #        correct
1.98      foxr     1243: 			      &Debug("auth is unix");
1.72      matthew  1244: 			      $contentpwd=(getpwnam($uname))[1];
                   1245: 			      my $pwdcorrect = "0";
                   1246: 			      my $pwauth_path="/usr/local/sbin/pwauth";
                   1247: 			      unless ($contentpwd eq 'x') {
                   1248: 				  $pwdcorrect=
                   1249:                                     (crypt($upass,$contentpwd) eq $contentpwd);
                   1250: 			      } elsif (-e $pwauth_path) {
                   1251: 				  open PWAUTH, "|$pwauth_path" or
                   1252: 				      die "Cannot invoke authentication";
                   1253: 				  print PWAUTH "$uname\n$upass\n";
                   1254: 				  close PWAUTH;
1.98      foxr     1255: 				  &Debug("exited pwauth with $? ($uname,$upass) ");
                   1256: 				  $pwdcorrect=($? == 0);
1.72      matthew  1257: 			      }
                   1258: 			     if ($pwdcorrect) {
                   1259: 				 my $execdir=$perlvar{'lonDaemons'};
1.98      foxr     1260: 				 &Debug("Opening lcpasswd pipeline");
1.132     matthew  1261: 				 my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1.72      matthew  1262: 				 print $pf "$uname\n$npass\n$npass\n";
                   1263: 				 close $pf;
1.97      foxr     1264: 				 my $err = $?;
                   1265: 				 my $result = ($err>0 ? 'pwchange_failure' 
1.72      matthew  1266: 					       : 'ok');
1.96      foxr     1267: 				 &logthis("Result of password change for $uname: ".
                   1268: 					  &lcpasswdstrerror($?));
1.72      matthew  1269: 				 print $client "$result\n";
                   1270: 			     } else {
                   1271: 				 print $client "non_authorized\n";
                   1272: 			     }
                   1273: 			  } else {
1.2       www      1274:                             print $client "auth_mode_error\n";
1.1       albertel 1275:                           }  
                   1276: 		       } else {
                   1277:                           print $client "unknown_user\n";
1.31      www      1278:                        }
                   1279: 		     } else {
                   1280: 		       print $client "refused\n";
                   1281: 		     }
                   1282: # -------------------------------------------------------------------- makeuser
                   1283:                    } elsif ($userinput =~ /^makeuser/) {
1.91      albertel 1284: 		     &Debug("Make user received");
1.56      harris41 1285:     	             my $oldumask=umask(0077);
1.31      www      1286: 		     if ($wasenc==1) {
                   1287:                        my 
                   1288:                        ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1.77      foxr     1289: 		       &Debug("cmd =".$cmd." $udom =".$udom.
                   1290: 				    " uname=".$uname);
1.31      www      1291:                        chomp($npass);
1.32      www      1292:                        $npass=&unescape($npass);
1.31      www      1293:                        my $proname=propath($udom,$uname);
                   1294:                        my $passfilename="$proname/passwd";
1.77      foxr     1295: 		       &Debug("Password file created will be:".
                   1296: 				    $passfilename);
1.31      www      1297:                        if (-e $passfilename) {
                   1298: 			   print $client "already_exists\n";
1.115     albertel 1299:                        } elsif ($udom ne $currentdomainid) {
1.31      www      1300:                            print $client "not_right_domain\n";
                   1301:                        } else {
1.134     albertel 1302:                            my @fpparts=split(/\//,$proname);
                   1303:                            my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
                   1304:                            my $fperror='';
                   1305:                            for (my $i=3;$i<=$#fpparts;$i++) {
1.31      www      1306:                                $fpnow.='/'.$fpparts[$i]; 
                   1307:                                unless (-e $fpnow) {
                   1308: 				   unless (mkdir($fpnow,0777)) {
1.109     foxr     1309:                                       $fperror="error: ".($!+0)
1.111     matthew  1310: 					  ." mkdir failed while attempting "
                   1311:                                               ."makeuser\n";
1.31      www      1312:                                    }
                   1313:                                }
                   1314:                            }
                   1315:                            unless ($fperror) {
1.98      foxr     1316: 			       my $result=&make_passwd_file($uname, $umode,$npass,
1.91      albertel 1317: 							    $passfilename);
                   1318: 			       print $client $result;
1.31      www      1319:                            } else {
                   1320:                                print $client "$fperror\n";
                   1321:                            }
1.55      harris41 1322:                        }
                   1323: 		     } else {
                   1324: 		       print $client "refused\n";
                   1325: 		     }
1.56      harris41 1326: 		     umask($oldumask);
1.55      harris41 1327: # -------------------------------------------------------------- changeuserauth
                   1328:                    } elsif ($userinput =~ /^changeuserauth/) {
1.77      foxr     1329: 		       &Debug("Changing authorization");
                   1330: 		      if ($wasenc==1) {
1.55      harris41 1331:                        my 
1.91      albertel 1332: 		       ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1.55      harris41 1333:                        chomp($npass);
1.77      foxr     1334: 		       &Debug("cmd = ".$cmd." domain= ".$udom.
                   1335: 			      "uname =".$uname." umode= ".$umode);
1.55      harris41 1336:                        $npass=&unescape($npass);
1.91      albertel 1337:                        my $proname=&propath($udom,$uname);
1.55      harris41 1338:                        my $passfilename="$proname/passwd";
1.115     albertel 1339: 		       if ($udom ne $currentdomainid) {
1.55      harris41 1340:                            print $client "not_right_domain\n";
                   1341:                        } else {
1.98      foxr     1342: 			   my $result=&make_passwd_file($uname, $umode,$npass,
1.93      albertel 1343: 							$passfilename);
1.91      albertel 1344: 			   print $client $result;
1.1       albertel 1345:                        }
                   1346: 		     } else {
                   1347: 		       print $client "refused\n";
                   1348: 		     }
                   1349: # ------------------------------------------------------------------------ home
                   1350:                    } elsif ($userinput =~ /^home/) {
                   1351:                        my ($cmd,$udom,$uname)=split(/:/,$userinput);
                   1352:                        chomp($uname);
                   1353:                        my $proname=propath($udom,$uname);
                   1354:                        if (-e $proname) {
                   1355:                           print $client "found\n";
                   1356:                        } else {
                   1357: 			  print $client "not_found\n";
                   1358:                        }
                   1359: # ---------------------------------------------------------------------- update
                   1360:                    } elsif ($userinput =~ /^update/) {
                   1361:                        my ($cmd,$fname)=split(/:/,$userinput);
                   1362:                        my $ownership=ishome($fname);
                   1363:                        if ($ownership eq 'not_owner') {
                   1364:                         if (-e $fname) {
                   1365:                           my ($dev,$ino,$mode,$nlink,
                   1366:                               $uid,$gid,$rdev,$size,
                   1367:                               $atime,$mtime,$ctime,
                   1368:                               $blksize,$blocks)=stat($fname);
1.134     albertel 1369:                           my $now=time;
                   1370:                           my $since=$now-$atime;
1.1       albertel 1371:                           if ($since>$perlvar{'lonExpire'}) {
1.134     albertel 1372:                               my $reply=
                   1373:                                     &reply("unsub:$fname","$hostid{$clientip}");
1.1       albertel 1374:                               unlink("$fname");
                   1375:                           } else {
                   1376: 			     my $transname="$fname.in.transfer";
                   1377:                              my $remoteurl=
                   1378:                                     reply("sub:$fname","$hostid{$clientip}");
                   1379:                              my $response;
                   1380:                               {
                   1381:                              my $ua=new LWP::UserAgent;
                   1382:                              my $request=new HTTP::Request('GET',"$remoteurl");
                   1383:                              $response=$ua->request($request,$transname);
                   1384: 			      }
                   1385:                              if ($response->is_error()) {
1.24      albertel 1386: 				 unlink($transname);
1.1       albertel 1387:                                  my $message=$response->status_line;
                   1388:                                  &logthis(
                   1389:                                   "LWP GET: $message for $fname ($remoteurl)");
                   1390:                              } else {
1.14      www      1391: 	                         if ($remoteurl!~/\.meta$/) {
1.28      www      1392:                                   my $ua=new LWP::UserAgent;
1.14      www      1393:                                   my $mrequest=
                   1394:                                    new HTTP::Request('GET',$remoteurl.'.meta');
                   1395:                                   my $mresponse=
                   1396:                                    $ua->request($mrequest,$fname.'.meta');
                   1397:                                   if ($mresponse->is_error()) {
                   1398: 		                    unlink($fname.'.meta');
                   1399:                                   }
                   1400: 	                         }
1.1       albertel 1401:                                  rename($transname,$fname);
                   1402: 			     }
                   1403:                           }
                   1404:                           print $client "ok\n";
                   1405:                         } else {
                   1406:                           print $client "not_found\n";
                   1407:                         }
                   1408: 		       } else {
                   1409: 			print $client "rejected\n";
                   1410:                        }
1.85      www      1411: # -------------------------------------- fetch a user file from a remote server
                   1412:                    } elsif ($userinput =~ /^fetchuserfile/) {
1.151   ! albertel 1413: 		       my ($cmd,$fname)=split(/:/,$userinput);
        !          1414: 		       my ($udom,$uname,$ufile)=split(/\//,$fname);
        !          1415: 		       my $udir=propath($udom,$uname).'/userfiles';
        !          1416: 		       unless (-e $udir) { mkdir($udir,0770); }
1.86      www      1417:                        if (-e $udir) {
1.151   ! albertel 1418: 			   $ufile=~s/^[\.\~]+//;
        !          1419: 			   $ufile=~s/\///g;
        !          1420: 			   my $destname=$udir.'/'.$ufile;
        !          1421: 			   my $transname=$udir.'/'.$ufile.'.in.transit';
        !          1422: 			   my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
        !          1423: 			   my $response;
        !          1424: 			   {
        !          1425: 			       my $ua=new LWP::UserAgent;
        !          1426: 			       my $request=new HTTP::Request('GET',"$remoteurl");
        !          1427: 			       $response=$ua->request($request,$transname);
        !          1428: 			   }
        !          1429: 			   if ($response->is_error()) {
        !          1430: 			       unlink($transname);
        !          1431: 			       my $message=$response->status_line;
        !          1432: 			       &logthis("LWP GET: $message for $fname ($remoteurl)");
        !          1433: 			       print $client "failed\n";
        !          1434: 			   } else {
        !          1435: 			       if (!rename($transname,$destname)) {
        !          1436: 				   &logthis("Unable to move $transname to $destname");
        !          1437: 				   unlink($transname);
        !          1438: 				   print $client "failed\n";
        !          1439: 			       } else {
        !          1440: 				   print $client "ok\n";
        !          1441: 			       }
        !          1442: 			   }
        !          1443: 		       } else {
        !          1444: 			   print $client "not_home\n";
        !          1445: 		       }
1.85      www      1446: # ------------------------------------------ authenticate access to a user file
1.86      www      1447:                    } elsif ($userinput =~ /^tokenauthuserfile/) {
1.85      www      1448:                        my ($cmd,$fname,$session)=split(/:/,$userinput);
1.86      www      1449:                        chomp($session);
1.134     albertel 1450:                        my $reply='non_auth';
1.86      www      1451:                        if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1.134     albertel 1452: 				$session.'.id')) {
                   1453: 			   while (my $line=<ENVIN>) {
                   1454: 			       if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
                   1455: 			   }
                   1456: 			   close(ENVIN);
                   1457: 			   print $client $reply."\n";
1.86      www      1458: 		       } else {
1.134     albertel 1459: 			   print $client "invalid_token\n";
1.86      www      1460:                        }
1.1       albertel 1461: # ----------------------------------------------------------------- unsubscribe
                   1462:                    } elsif ($userinput =~ /^unsub/) {
                   1463:                        my ($cmd,$fname)=split(/:/,$userinput);
                   1464:                        if (-e $fname) {
1.84      albertel 1465: 			   print $client &unsub($client,$fname,$clientip);
1.1       albertel 1466:                        } else {
                   1467: 			   print $client "not_found\n";
                   1468:                        }
                   1469: # ------------------------------------------------------------------- subscribe
                   1470:                    } elsif ($userinput =~ /^sub/) {
1.84      albertel 1471: 		       print $client &subscribe($userinput,$clientip);
1.102     www      1472: # ------------------------------------------------------------- current version
                   1473:                    } elsif ($userinput =~ /^currentversion/) {
                   1474:                        my ($cmd,$fname)=split(/:/,$userinput);
                   1475: 		       print $client &currentversion($fname)."\n";
1.12      harris41 1476: # ------------------------------------------------------------------------- log
                   1477:                    } elsif ($userinput =~ /^log/) {
                   1478:                        my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
                   1479:                        chomp($what);
                   1480:                        my $proname=propath($udom,$uname);
                   1481:                        my $now=time;
                   1482:                        {
                   1483: 			 my $hfh;
                   1484: 			 if ($hfh=IO::File->new(">>$proname/activity.log")) { 
                   1485:                             print $hfh "$now:$hostid{$clientip}:$what\n";
                   1486:                             print $client "ok\n"; 
                   1487: 			} else {
1.109     foxr     1488:                             print $client "error: ".($!+0)
1.111     matthew  1489: 				." IO::File->new Failed "
                   1490:                                     ."while attempting log\n";
1.12      harris41 1491: 		        }
                   1492: 		       }
1.1       albertel 1493: # ------------------------------------------------------------------------- put
                   1494:                    } elsif ($userinput =~ /^put/) {
1.6       www      1495:                       my ($cmd,$udom,$uname,$namespace,$what)
1.1       albertel 1496:                           =split(/:/,$userinput);
1.8       www      1497:                       $namespace=~s/\//\_/g;
1.6       www      1498:                       $namespace=~s/\W//g;
                   1499:                       if ($namespace ne 'roles') {
1.1       albertel 1500:                        chomp($what);
                   1501:                        my $proname=propath($udom,$uname);
                   1502:                        my $now=time;
1.48      www      1503:                        unless ($namespace=~/^nohist\_/) {
1.1       albertel 1504: 			   my $hfh;
                   1505: 			   if (
                   1506:                              $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1507: 			       ) { print $hfh "P:$now:$what\n"; }
                   1508: 		       }
                   1509:                        my @pairs=split(/\&/,$what);
1.134     albertel 1510: 		       my %hash;
                   1511: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1512:                            foreach my $pair (@pairs) {
                   1513: 			       my ($key,$value)=split(/=/,$pair);
1.1       albertel 1514:                                $hash{$key}=$value;
                   1515:                            }
1.4       www      1516: 			   if (untie(%hash)) {
1.1       albertel 1517:                               print $client "ok\n";
                   1518:                            } else {
1.109     foxr     1519:                               print $client "error: ".($!+0)
1.111     matthew  1520: 				  ." untie(GDBM) failed ".
                   1521:                                       "while attempting put\n";
1.1       albertel 1522:                            }
                   1523:                        } else {
1.109     foxr     1524:                            print $client "error: ".($!)
1.111     matthew  1525: 			       ." tie(GDBM) Failed ".
                   1526:                                    "while attempting put\n";
1.1       albertel 1527:                        }
1.6       www      1528: 		      } else {
                   1529:                           print $client "refused\n";
                   1530:                       }
                   1531: # -------------------------------------------------------------------- rolesput
                   1532:                    } elsif ($userinput =~ /^rolesput/) {
1.77      foxr     1533: 		       &Debug("rolesput");
1.6       www      1534: 		    if ($wasenc==1) {
                   1535:                        my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
                   1536:                           =split(/:/,$userinput);
1.77      foxr     1537: 		       &Debug("cmd = ".$cmd." exedom= ".$exedom.
                   1538: 				    "user = ".$exeuser." udom=".$udom.
                   1539: 				    "what = ".$what);
1.6       www      1540:                        my $namespace='roles';
                   1541:                        chomp($what);
                   1542:                        my $proname=propath($udom,$uname);
                   1543:                        my $now=time;
                   1544:                        {
                   1545: 			   my $hfh;
                   1546: 			   if (
                   1547:                              $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1548: 			       ) { 
                   1549:                                   print $hfh "P:$now:$exedom:$exeuser:$what\n";
                   1550:                                  }
                   1551: 		       }
                   1552:                        my @pairs=split(/\&/,$what);
1.134     albertel 1553: 		       my %hash;
                   1554: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1555:                            foreach my $pair (@pairs) {
                   1556: 			       my ($key,$value)=split(/=/,$pair);
1.78      foxr     1557: 			       &ManagePermissions($key, $udom, $uname,
                   1558: 						  &GetAuthType( $udom, 
                   1559: 								$uname));
1.6       www      1560:                                $hash{$key}=$value;
                   1561:                            }
                   1562: 			   if (untie(%hash)) {
                   1563:                               print $client "ok\n";
                   1564:                            } else {
1.109     foxr     1565:                               print $client "error: ".($!+0)
1.111     matthew  1566: 				  ." untie(GDBM) Failed ".
                   1567:                                       "while attempting rolesput\n";
1.6       www      1568:                            }
                   1569:                        } else {
1.109     foxr     1570:                            print $client "error: ".($!+0)
1.111     matthew  1571: 			       ." tie(GDBM) Failed ".
                   1572:                                    "while attempting rolesput\n";
1.117     www      1573:                        }
                   1574: 		      } else {
                   1575:                           print $client "refused\n";
                   1576:                       }
                   1577: # -------------------------------------------------------------------- rolesdel
                   1578:                    } elsif ($userinput =~ /^rolesdel/) {
                   1579: 		       &Debug("rolesdel");
                   1580: 		    if ($wasenc==1) {
                   1581:                        my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
                   1582:                           =split(/:/,$userinput);
                   1583: 		       &Debug("cmd = ".$cmd." exedom= ".$exedom.
                   1584: 				    "user = ".$exeuser." udom=".$udom.
                   1585: 				    "what = ".$what);
                   1586:                        my $namespace='roles';
                   1587:                        chomp($what);
                   1588:                        my $proname=propath($udom,$uname);
                   1589:                        my $now=time;
                   1590:                        {
                   1591: 			   my $hfh;
                   1592: 			   if (
                   1593:                              $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1594: 			       ) { 
                   1595:                                   print $hfh "D:$now:$exedom:$exeuser:$what\n";
                   1596:                                  }
                   1597: 		       }
                   1598:                        my @rolekeys=split(/\&/,$what);
1.134     albertel 1599: 		       my %hash;
                   1600: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1601:                            foreach my $key (@rolekeys) {
1.117     www      1602:                                delete $hash{$key};
                   1603:                            }
                   1604: 			   if (untie(%hash)) {
                   1605:                               print $client "ok\n";
                   1606:                            } else {
                   1607:                               print $client "error: ".($!+0)
                   1608: 				  ." untie(GDBM) Failed ".
                   1609:                                       "while attempting rolesdel\n";
                   1610:                            }
                   1611:                        } else {
                   1612:                            print $client "error: ".($!+0)
                   1613: 			       ." tie(GDBM) Failed ".
                   1614:                                    "while attempting rolesdel\n";
1.6       www      1615:                        }
                   1616: 		      } else {
                   1617:                           print $client "refused\n";
                   1618:                       }
1.1       albertel 1619: # ------------------------------------------------------------------------- get
                   1620:                    } elsif ($userinput =~ /^get/) {
                   1621:                        my ($cmd,$udom,$uname,$namespace,$what)
                   1622:                           =split(/:/,$userinput);
1.8       www      1623:                        $namespace=~s/\//\_/g;
1.1       albertel 1624:                        $namespace=~s/\W//g;
                   1625:                        chomp($what);
                   1626:                        my @queries=split(/\&/,$what);
                   1627:                        my $proname=propath($udom,$uname);
                   1628:                        my $qresult='';
1.134     albertel 1629: 		       my %hash;
                   1630: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   1631:                            for (my $i=0;$i<=$#queries;$i++) {
1.1       albertel 1632:                                $qresult.="$hash{$queries[$i]}&";
                   1633:                            }
1.4       www      1634: 			   if (untie(%hash)) {
1.1       albertel 1635: 		              $qresult=~s/\&$//;
                   1636:                               print $client "$qresult\n";
                   1637:                            } else {
1.109     foxr     1638:                               print $client "error: ".($!+0)
1.111     matthew  1639: 				  ." untie(GDBM) Failed ".
                   1640:                                       "while attempting get\n";
1.1       albertel 1641:                            }
                   1642:                        } else {
1.112     matthew  1643:                            if ($!+0 == 2) {
                   1644:                                print $client "error:No such file or ".
                   1645:                                    "GDBM reported bad block error\n";
                   1646:                            } else {
                   1647:                                print $client "error: ".($!+0)
                   1648:                                    ." tie(GDBM) Failed ".
                   1649:                                        "while attempting get\n";
                   1650:                            }
1.1       albertel 1651:                        }
                   1652: # ------------------------------------------------------------------------ eget
                   1653:                    } elsif ($userinput =~ /^eget/) {
                   1654:                        my ($cmd,$udom,$uname,$namespace,$what)
                   1655:                           =split(/:/,$userinput);
1.8       www      1656:                        $namespace=~s/\//\_/g;
1.1       albertel 1657:                        $namespace=~s/\W//g;
                   1658:                        chomp($what);
                   1659:                        my @queries=split(/\&/,$what);
                   1660:                        my $proname=propath($udom,$uname);
                   1661:                        my $qresult='';
1.134     albertel 1662: 		       my %hash;
                   1663: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   1664:                            for (my $i=0;$i<=$#queries;$i++) {
1.1       albertel 1665:                                $qresult.="$hash{$queries[$i]}&";
                   1666:                            }
1.4       www      1667: 			   if (untie(%hash)) {
1.1       albertel 1668: 		              $qresult=~s/\&$//;
                   1669:                               if ($cipher) {
                   1670:                                 my $cmdlength=length($qresult);
                   1671:                                 $qresult.="         ";
                   1672:                                 my $encqresult='';
                   1673:                                 for 
                   1674: 				(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                   1675:                                  $encqresult.=
                   1676:                                  unpack("H16",
                   1677:                                  $cipher->encrypt(substr($qresult,$encidx,8)));
                   1678:                                 }
                   1679:                                 print $client "enc:$cmdlength:$encqresult\n";
                   1680: 			      } else {
                   1681: 			        print $client "error:no_key\n";
                   1682:                               }
                   1683:                            } else {
1.109     foxr     1684:                               print $client "error: ".($!+0)
1.111     matthew  1685: 				  ." untie(GDBM) Failed ".
                   1686:                                       "while attempting eget\n";
1.1       albertel 1687:                            }
                   1688:                        } else {
1.109     foxr     1689:                            print $client "error: ".($!+0)
1.111     matthew  1690: 			       ." tie(GDBM) Failed ".
                   1691:                                    "while attempting eget\n";
1.1       albertel 1692:                        }
                   1693: # ------------------------------------------------------------------------- del
                   1694:                    } elsif ($userinput =~ /^del/) {
                   1695:                        my ($cmd,$udom,$uname,$namespace,$what)
                   1696:                           =split(/:/,$userinput);
1.8       www      1697:                        $namespace=~s/\//\_/g;
1.1       albertel 1698:                        $namespace=~s/\W//g;
                   1699:                        chomp($what);
                   1700:                        my $proname=propath($udom,$uname);
                   1701:                        my $now=time;
1.48      www      1702:                        unless ($namespace=~/^nohist\_/) {
1.1       albertel 1703: 			   my $hfh;
                   1704: 			   if (
                   1705:                              $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1706: 			       ) { print $hfh "D:$now:$what\n"; }
                   1707: 		       }
                   1708:                        my @keys=split(/\&/,$what);
1.134     albertel 1709: 		       my %hash;
                   1710: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1711:                            foreach my $key (@keys) {
1.1       albertel 1712:                                delete($hash{$key});
                   1713:                            }
1.4       www      1714: 			   if (untie(%hash)) {
1.1       albertel 1715:                               print $client "ok\n";
                   1716:                            } else {
1.109     foxr     1717:                               print $client "error: ".($!+0)
1.111     matthew  1718: 				  ." untie(GDBM) Failed ".
                   1719:                                       "while attempting del\n";
1.1       albertel 1720:                            }
                   1721:                        } else {
1.109     foxr     1722:                            print $client "error: ".($!+0)
1.111     matthew  1723: 			       ." tie(GDBM) Failed ".
                   1724:                                    "while attempting del\n";
1.1       albertel 1725:                        }
                   1726: # ------------------------------------------------------------------------ keys
                   1727:                    } elsif ($userinput =~ /^keys/) {
                   1728:                        my ($cmd,$udom,$uname,$namespace)
                   1729:                           =split(/:/,$userinput);
1.8       www      1730:                        $namespace=~s/\//\_/g;
1.1       albertel 1731:                        $namespace=~s/\W//g;
                   1732:                        my $proname=propath($udom,$uname);
                   1733:                        my $qresult='';
1.134     albertel 1734: 		       my %hash;
                   1735: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   1736:                            foreach my $key (keys %hash) {
1.1       albertel 1737:                                $qresult.="$key&";
                   1738:                            }
1.4       www      1739: 			   if (untie(%hash)) {
1.1       albertel 1740: 		              $qresult=~s/\&$//;
                   1741:                               print $client "$qresult\n";
                   1742:                            } else {
1.109     foxr     1743:                               print $client "error: ".($!+0)
1.111     matthew  1744: 				  ." untie(GDBM) Failed ".
                   1745:                                       "while attempting keys\n";
1.105     matthew  1746:                            }
                   1747:                        } else {
1.109     foxr     1748:                            print $client "error: ".($!+0)
1.111     matthew  1749: 			       ." tie(GDBM) Failed ".
                   1750:                                    "while attempting keys\n";
1.105     matthew  1751:                        }
                   1752: # ----------------------------------------------------------------- dumpcurrent
1.107     matthew  1753:                    } elsif ($userinput =~ /^currentdump/) {
1.105     matthew  1754:                        my ($cmd,$udom,$uname,$namespace)
                   1755:                           =split(/:/,$userinput);
                   1756:                        $namespace=~s/\//\_/g;
                   1757:                        $namespace=~s/\W//g;
                   1758:                        my $qresult='';
                   1759:                        my $proname=propath($udom,$uname);
1.134     albertel 1760: 		       my %hash;
1.105     matthew  1761:                        if (tie(%hash,'GDBM_File',
                   1762:                                "$proname/$namespace.db",
                   1763:                                &GDBM_READER(),0640)) {
                   1764:                            # Structure of %data:
                   1765:                            # $data{$symb}->{$parameter}=$value;
                   1766:                            # $data{$symb}->{'v.'.$parameter}=$version;
                   1767:                            # since $parameter will be unescaped, we do not
                   1768:                            # have to worry about silly parameter names...
                   1769:                            my %data = ();
                   1770:                            while (my ($key,$value) = each(%hash)) {
                   1771:                               my ($v,$symb,$param) = split(/:/,$key);
                   1772:                               next if ($v eq 'version' || $symb eq 'keys');
                   1773:                               next if (exists($data{$symb}) && 
                   1774:                                        exists($data{$symb}->{$param}) &&
                   1775:                                        $data{$symb}->{'v.'.$param} > $v);
                   1776:                               $data{$symb}->{$param}=$value;
1.107     matthew  1777:                               $data{$symb}->{'v.'.$param}=$v;
1.105     matthew  1778:                            }
                   1779:                            if (untie(%hash)) {
                   1780:                              while (my ($symb,$param_hash) = each(%data)) {
                   1781:                                while(my ($param,$value) = each (%$param_hash)){
                   1782:                                  next if ($param =~ /^v\./);
                   1783:                                  $qresult.=$symb.':'.$param.'='.$value.'&';
                   1784:                                }
                   1785:                              }
                   1786:                              chop($qresult);
                   1787:                              print $client "$qresult\n";
                   1788:                            } else {
1.109     foxr     1789:                              print $client "error: ".($!+0)
1.111     matthew  1790: 				 ." untie(GDBM) Failed ".
                   1791:                                      "while attempting currentdump\n";
1.1       albertel 1792:                            }
                   1793:                        } else {
1.109     foxr     1794:                            print $client "error: ".($!+0)
1.111     matthew  1795: 			       ." tie(GDBM) Failed ".
                   1796:                                       "while attempting currentdump\n";
1.1       albertel 1797:                        }
                   1798: # ------------------------------------------------------------------------ dump
                   1799:                    } elsif ($userinput =~ /^dump/) {
1.62      www      1800:                        my ($cmd,$udom,$uname,$namespace,$regexp)
1.1       albertel 1801:                           =split(/:/,$userinput);
1.8       www      1802:                        $namespace=~s/\//\_/g;
1.1       albertel 1803:                        $namespace=~s/\W//g;
1.62      www      1804:                        if (defined($regexp)) {
                   1805:                           $regexp=&unescape($regexp);
                   1806: 		       } else {
                   1807:                           $regexp='.';
                   1808: 		       }
1.100     matthew  1809:                        my $qresult='';
1.1       albertel 1810:                        my $proname=propath($udom,$uname);
1.134     albertel 1811: 		       my %hash;
                   1812: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1.90      stredwic 1813:                            study($regexp);
1.134     albertel 1814:                            while (my ($key,$value) = each(%hash)) {
1.100     matthew  1815:                                if ($regexp eq '.') {
                   1816:                                    $qresult.=$key.'='.$value.'&';
                   1817:                                } else {
                   1818:                                    my $unescapeKey = &unescape($key);
                   1819:                                    if (eval('$unescapeKey=~/$regexp/')) {
                   1820:                                        $qresult.="$key=$value&";
                   1821:                                    }
                   1822:                                }
1.7       www      1823:                            }
1.100     matthew  1824:                            if (untie(%hash)) {
                   1825:                                chop($qresult);
                   1826:                                print $client "$qresult\n";
1.7       www      1827:                            } else {
1.109     foxr     1828:                                print $client "error: ".($!+0)
1.111     matthew  1829: 				   ." untie(GDBM) Failed ".
                   1830:                                        "while attempting dump\n";
1.7       www      1831:                            }
                   1832:                        } else {
1.109     foxr     1833:                            print $client "error: ".($!+0)
1.111     matthew  1834: 			       ." tie(GDBM) Failed ".
                   1835:                                       "while attempting dump\n";
1.7       www      1836:                        }
                   1837: # ----------------------------------------------------------------------- store
                   1838:                    } elsif ($userinput =~ /^store/) {
                   1839:                       my ($cmd,$udom,$uname,$namespace,$rid,$what)
                   1840:                           =split(/:/,$userinput);
1.8       www      1841:                       $namespace=~s/\//\_/g;
1.7       www      1842:                       $namespace=~s/\W//g;
                   1843:                       if ($namespace ne 'roles') {
                   1844:                        chomp($what);
                   1845:                        my $proname=propath($udom,$uname);
                   1846:                        my $now=time;
1.48      www      1847:                        unless ($namespace=~/^nohist\_/) {
1.7       www      1848: 			   my $hfh;
                   1849: 			   if (
                   1850:                              $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1851: 			       ) { print $hfh "P:$now:$rid:$what\n"; }
                   1852: 		       }
                   1853:                        my @pairs=split(/\&/,$what);
1.134     albertel 1854: 		       my %hash;
                   1855: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1.7       www      1856:                            my @previouskeys=split(/&/,$hash{"keys:$rid"});
                   1857:                            my $key;
                   1858:                            $hash{"version:$rid"}++;
                   1859:                            my $version=$hash{"version:$rid"};
                   1860:                            my $allkeys=''; 
1.134     albertel 1861:                            foreach my $pair (@pairs) {
                   1862: 			       my ($key,$value)=split(/=/,$pair);
1.7       www      1863:                                $allkeys.=$key.':';
                   1864:                                $hash{"$version:$rid:$key"}=$value;
                   1865:                            }
1.36      www      1866:                            $hash{"$version:$rid:timestamp"}=$now;
                   1867:                            $allkeys.='timestamp';
1.7       www      1868:                            $hash{"$version:keys:$rid"}=$allkeys;
                   1869: 			   if (untie(%hash)) {
                   1870:                               print $client "ok\n";
                   1871:                            } else {
1.109     foxr     1872:                               print $client "error: ".($!+0)
1.111     matthew  1873: 				  ." untie(GDBM) Failed ".
                   1874:                                       "while attempting store\n";
1.7       www      1875:                            }
                   1876:                        } else {
1.109     foxr     1877:                            print $client "error: ".($!+0)
1.111     matthew  1878: 			       ." tie(GDBM) Failed ".
                   1879:                                    "while attempting store\n";
1.7       www      1880:                        }
                   1881: 		      } else {
                   1882:                           print $client "refused\n";
                   1883:                       }
                   1884: # --------------------------------------------------------------------- restore
                   1885:                    } elsif ($userinput =~ /^restore/) {
                   1886:                        my ($cmd,$udom,$uname,$namespace,$rid)
                   1887:                           =split(/:/,$userinput);
1.8       www      1888:                        $namespace=~s/\//\_/g;
1.7       www      1889:                        $namespace=~s/\W//g;
                   1890:                        chomp($rid);
                   1891:                        my $proname=propath($udom,$uname);
                   1892:                        my $qresult='';
1.134     albertel 1893: 		       my %hash;
                   1894: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1.7       www      1895:                 	   my $version=$hash{"version:$rid"};
                   1896:                            $qresult.="version=$version&";
                   1897:                            my $scope;
                   1898:                            for ($scope=1;$scope<=$version;$scope++) {
                   1899: 			      my $vkeys=$hash{"$scope:keys:$rid"};
                   1900:                               my @keys=split(/:/,$vkeys);
                   1901:                               my $key;
                   1902:                               $qresult.="$scope:keys=$vkeys&";
                   1903:                               foreach $key (@keys) {
1.21      www      1904: 	     $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1.7       www      1905:                               }                                  
1.1       albertel 1906:                            }
1.4       www      1907: 			   if (untie(%hash)) {
1.1       albertel 1908: 		              $qresult=~s/\&$//;
                   1909:                               print $client "$qresult\n";
                   1910:                            } else {
1.109     foxr     1911:                               print $client "error: ".($!+0)
1.111     matthew  1912: 				  ." untie(GDBM) Failed ".
                   1913:                                       "while attempting restore\n";
1.1       albertel 1914:                            }
                   1915:                        } else {
1.109     foxr     1916:                            print $client "error: ".($!+0)
1.111     matthew  1917: 			       ." tie(GDBM) Failed ".
                   1918:                                    "while attempting restore\n";
1.1       albertel 1919:                        }
1.86      www      1920: # -------------------------------------------------------------------- chatsend
                   1921:                    } elsif ($userinput =~ /^chatsend/) {
                   1922:                        my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
                   1923:                        &chatadd($cdom,$cnum,$newpost);
                   1924:                        print $client "ok\n";
                   1925: # -------------------------------------------------------------------- chatretr
                   1926:                    } elsif ($userinput =~ /^chatretr/) {
1.122     www      1927:                        my 
                   1928:                         ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
1.86      www      1929:                        my $reply='';
1.122     www      1930:                        foreach (&getchat($cdom,$cnum,$udom,$uname)) {
1.86      www      1931: 			   $reply.=&escape($_).':';
                   1932:                        }
                   1933:                        $reply=~s/\:$//;
                   1934:                        print $client $reply."\n";
1.12      harris41 1935: # ------------------------------------------------------------------- querysend
                   1936:                    } elsif ($userinput =~ /^querysend/) {
1.44      harris41 1937:                        my ($cmd,$query,
1.82      www      1938: 			   $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1.12      harris41 1939: 		       $query=~s/\n*$//g;
1.82      www      1940: 		       print $client "".
1.40      harris41 1941: 			       sqlreply("$hostid{$clientip}\&$query".
1.82      www      1942: 					"\&$arg1"."\&$arg2"."\&$arg3")."\n";
1.12      harris41 1943: # ------------------------------------------------------------------ queryreply
                   1944:                    } elsif ($userinput =~ /^queryreply/) {
                   1945:                        my ($cmd,$id,$reply)=split(/:/,$userinput); 
                   1946: 		       my $store;
1.13      www      1947:                        my $execdir=$perlvar{'lonDaemons'};
                   1948:                        if ($store=IO::File->new(">$execdir/tmp/$id")) {
1.43      harris41 1949: 			   $reply=~s/\&/\n/g;
1.12      harris41 1950: 			   print $store $reply;
                   1951: 			   close $store;
1.46      harris41 1952: 			   my $store2=IO::File->new(">$execdir/tmp/$id.end");
                   1953: 			   print $store2 "done\n";
                   1954: 			   close $store2;
1.12      harris41 1955: 			   print $client "ok\n";
                   1956: 		       }
                   1957: 		       else {
1.109     foxr     1958: 			   print $client "error: ".($!+0)
1.111     matthew  1959: 			       ." IO::File->new Failed ".
                   1960:                                    "while attempting queryreply\n";
1.12      harris41 1961: 		       }
1.118     www      1962: # ----------------------------------------------------------------- courseidput
                   1963:                    } elsif ($userinput =~ /^courseidput/) {
                   1964:                        my ($cmd,$udom,$what)=split(/:/,$userinput);
                   1965:                        chomp($what);
                   1966:                        $udom=~s/\W//g;
                   1967:                        my $proname=
                   1968:                               "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
                   1969:                        my $now=time;
                   1970:                        my @pairs=split(/\&/,$what);
1.134     albertel 1971: 		       my %hash;
                   1972: 		       if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
                   1973:                            foreach my $pair (@pairs) {
                   1974: 			       my ($key,$value)=split(/=/,$pair);
1.118     www      1975:                                $hash{$key}=$value.':'.$now;
                   1976:                            }
                   1977: 			   if (untie(%hash)) {
                   1978:                               print $client "ok\n";
                   1979:                            } else {
                   1980:                               print $client "error: ".($!+0)
                   1981: 				  ." untie(GDBM) Failed ".
                   1982:                                       "while attempting courseidput\n";
                   1983:                            }
                   1984:                        } else {
                   1985:                            print $client "error: ".($!+0)
                   1986: 			       ." tie(GDBM) Failed ".
                   1987:                                       "while attempting courseidput\n";
                   1988:                        }
                   1989: # ---------------------------------------------------------------- courseiddump
                   1990:                    } elsif ($userinput =~ /^courseiddump/) {
                   1991:                        my ($cmd,$udom,$since,$description)
                   1992:                           =split(/:/,$userinput);
                   1993:                        if (defined($description)) {
                   1994:                           $description=&unescape($description);
                   1995: 		       } else {
                   1996:                           $description='.';
                   1997: 		       }
                   1998:                        unless (defined($since)) { $since=0; }
                   1999:                        my $qresult='';
                   2000:                        my $proname=
                   2001:                               "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1.134     albertel 2002: 		       my %hash;
                   2003: 		       if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
                   2004:                            while (my ($key,$value) = each(%hash)) {
1.118     www      2005:                                my ($descr,$lasttime)=split(/\:/,$value);
                   2006:                                if ($lasttime<$since) { next; }
1.133     www      2007:                                if ($description eq '.') {
1.118     www      2008:                                    $qresult.=$key.'='.$descr.'&';
                   2009:                                } else {
                   2010:                                    my $unescapeVal = &unescape($descr);
1.120     www      2011:                                    if (eval('$unescapeVal=~/$description/i')) {
1.118     www      2012:                                        $qresult.="$key=$descr&";
                   2013:                                    }
                   2014:                                }
                   2015:                            }
                   2016:                            if (untie(%hash)) {
                   2017:                                chop($qresult);
                   2018:                                print $client "$qresult\n";
                   2019:                            } else {
                   2020:                                print $client "error: ".($!+0)
                   2021: 				   ." untie(GDBM) Failed ".
                   2022:                                        "while attempting courseiddump\n";
                   2023:                            }
                   2024:                        } else {
                   2025:                            print $client "error: ".($!+0)
                   2026: 			       ." tie(GDBM) Failed ".
                   2027:                                       "while attempting courseiddump\n";
                   2028:                        }
1.1       albertel 2029: # ----------------------------------------------------------------------- idput
                   2030:                    } elsif ($userinput =~ /^idput/) {
                   2031:                        my ($cmd,$udom,$what)=split(/:/,$userinput);
                   2032:                        chomp($what);
                   2033:                        $udom=~s/\W//g;
                   2034:                        my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
                   2035:                        my $now=time;
                   2036:                        {
                   2037: 			   my $hfh;
                   2038: 			   if (
                   2039:                              $hfh=IO::File->new(">>$proname.hist")
                   2040: 			       ) { print $hfh "P:$now:$what\n"; }
                   2041: 		       }
                   2042:                        my @pairs=split(/\&/,$what);
1.134     albertel 2043: 		       my %hash;
                   2044: 		       if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
                   2045:                            foreach my $pair (@pairs) {
                   2046: 			       my ($key,$value)=split(/=/,$pair);
1.1       albertel 2047:                                $hash{$key}=$value;
                   2048:                            }
1.4       www      2049: 			   if (untie(%hash)) {
1.1       albertel 2050:                               print $client "ok\n";
                   2051:                            } else {
1.109     foxr     2052:                               print $client "error: ".($!+0)
1.111     matthew  2053: 				  ." untie(GDBM) Failed ".
                   2054:                                       "while attempting idput\n";
1.1       albertel 2055:                            }
                   2056:                        } else {
1.109     foxr     2057:                            print $client "error: ".($!+0)
1.111     matthew  2058: 			       ." tie(GDBM) Failed ".
                   2059:                                       "while attempting idput\n";
1.1       albertel 2060:                        }
                   2061: # ----------------------------------------------------------------------- idget
                   2062:                    } elsif ($userinput =~ /^idget/) {
                   2063:                        my ($cmd,$udom,$what)=split(/:/,$userinput);
                   2064:                        chomp($what);
                   2065:                        $udom=~s/\W//g;
                   2066:                        my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
                   2067:                        my @queries=split(/\&/,$what);
                   2068:                        my $qresult='';
1.134     albertel 2069: 		       my %hash;
                   2070: 		       if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
                   2071:                            for (my $i=0;$i<=$#queries;$i++) {
1.1       albertel 2072:                                $qresult.="$hash{$queries[$i]}&";
                   2073:                            }
1.4       www      2074: 			   if (untie(%hash)) {
1.134     albertel 2075: 			       $qresult=~s/\&$//;
                   2076: 			       print $client "$qresult\n";
1.1       albertel 2077:                            } else {
1.134     albertel 2078: 			       print $client "error: ".($!+0)
                   2079: 				   ." untie(GDBM) Failed ".
                   2080: 				       "while attempting idget\n";
1.1       albertel 2081:                            }
                   2082:                        } else {
1.109     foxr     2083:                            print $client "error: ".($!+0)
1.111     matthew  2084: 			       ." tie(GDBM) Failed ".
                   2085:                                    "while attempting idget\n";
1.1       albertel 2086:                        }
1.13      www      2087: # ---------------------------------------------------------------------- tmpput
                   2088:                    } elsif ($userinput =~ /^tmpput/) {
                   2089:                        my ($cmd,$what)=split(/:/,$userinput);
                   2090: 		       my $store;
                   2091:                        $tmpsnum++;
                   2092:                        my $id=$$.'_'.$clientip.'_'.$tmpsnum;
                   2093:                        $id=~s/\W/\_/g;
                   2094:                        $what=~s/\n//g;
                   2095:                        my $execdir=$perlvar{'lonDaemons'};
                   2096:                        if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
                   2097: 			   print $store $what;
                   2098: 			   close $store;
                   2099: 			   print $client "$id\n";
                   2100: 		       }
                   2101: 		       else {
1.109     foxr     2102: 			   print $client "error: ".($!+0)
1.111     matthew  2103: 			       ."IO::File->new Failed ".
                   2104:                                    "while attempting tmpput\n";
1.13      www      2105: 		       }
                   2106: 
                   2107: # ---------------------------------------------------------------------- tmpget
                   2108:                    } elsif ($userinput =~ /^tmpget/) {
                   2109:                        my ($cmd,$id)=split(/:/,$userinput);
                   2110:                        chomp($id);
                   2111:                        $id=~s/\W/\_/g;
                   2112:                        my $store;
                   2113:                        my $execdir=$perlvar{'lonDaemons'};
                   2114:                        if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
                   2115:                            my $reply=<$store>;
                   2116: 			   print $client "$reply\n";
                   2117:                            close $store;
                   2118: 		       }
                   2119: 		       else {
1.109     foxr     2120: 			   print $client "error: ".($!+0)
1.111     matthew  2121: 			       ."IO::File->new Failed ".
                   2122:                                    "while attempting tmpget\n";
1.13      www      2123: 		       }
                   2124: 
1.110     www      2125: # ---------------------------------------------------------------------- tmpdel
                   2126:                    } elsif ($userinput =~ /^tmpdel/) {
                   2127:                        my ($cmd,$id)=split(/:/,$userinput);
                   2128:                        chomp($id);
                   2129:                        $id=~s/\W/\_/g;
                   2130:                        my $execdir=$perlvar{'lonDaemons'};
                   2131:                        if (unlink("$execdir/tmp/$id.tmp")) {
                   2132: 			   print $client "ok\n";
                   2133: 		       } else {
                   2134: 			   print $client "error: ".($!+0)
1.111     matthew  2135: 			       ."Unlink tmp Failed ".
                   2136:                                    "while attempting tmpdel\n";
1.110     www      2137: 		       }
1.5       www      2138: # -------------------------------------------------------------------------- ls
                   2139:                    } elsif ($userinput =~ /^ls/) {
                   2140:                        my ($cmd,$ulsdir)=split(/:/,$userinput);
                   2141:                        my $ulsout='';
                   2142:                        my $ulsfn;
                   2143:                        if (-e $ulsdir) {
1.83      stredwic 2144:                            if(-d $ulsdir) {
                   2145:                                if (opendir(LSDIR,$ulsdir)) {
                   2146:                                    while ($ulsfn=readdir(LSDIR)) {
                   2147:                                        my @ulsstats=stat($ulsdir.'/'.$ulsfn);
                   2148:                                        $ulsout.=$ulsfn.'&'.
                   2149:                                                 join('&',@ulsstats).':';
                   2150:                                    }
                   2151:                                    closedir(LSDIR);
                   2152:                                }
                   2153:                            } else {
                   2154:                                my @ulsstats=stat($ulsdir);
                   2155:                                $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
                   2156:                            }
                   2157:                        } else {
1.5       www      2158:                           $ulsout='no_such_dir';
                   2159:                        }
1.17      www      2160:                        if ($ulsout eq '') { $ulsout='empty'; }
1.5       www      2161:                        print $client "$ulsout\n";
1.136     www      2162: # ----------------------------------------------------------------- setannounce
                   2163:                    } elsif ($userinput =~ /^setannounce/) {
                   2164: 		       my ($cmd,$announcement)=split(/:/,$userinput);
                   2165: 		       chomp($announcement);
                   2166: 		       $announcement=&unescape($announcement);
                   2167:                        if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
                   2168: 						'/announcement.txt')) {
                   2169: 			   print $store $announcement;
                   2170:                            close $store;
                   2171: 			   print $client "ok\n";
                   2172: 		       } else {
                   2173: 			   print $client "error: ".($!+0)."\n";
                   2174: 		       }
1.51      www      2175: # ------------------------------------------------------------------ Hanging up
                   2176:                    } elsif (($userinput =~ /^exit/) ||
                   2177:                             ($userinput =~ /^init/)) {
                   2178:                        &logthis(
                   2179:       "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
                   2180:                        print $client "bye\n";
1.59      www      2181:                        $client->close();
1.51      www      2182: 		       last;
1.1       albertel 2183: # ------------------------------------------------------------- unknown command
1.121     albertel 2184: 		   } elsif ($userinput =~ /^sethost:/) {
                   2185: 		       print $client &sethost($userinput)."\n";
                   2186: 		   } elsif ($userinput =~/^version:/) {
                   2187: 		       print $client &version($userinput)."\n";
1.1       albertel 2188:                    } else {
                   2189:                        # unknown command
                   2190:                        print $client "unknown_cmd\n";
                   2191:                    }
1.58      www      2192: # -------------------------------------------------------------------- complete
1.63      www      2193: 		   alarm(0);
1.58      www      2194:                    &status('Listening to '.$hostid{$clientip});
                   2195: 	       }
1.59      www      2196: # --------------------------------------------- client unknown or fishy, refuse
1.1       albertel 2197:             } else {
                   2198: 	        print $client "refused\n";
1.59      www      2199:                 $client->close();
1.9       www      2200:                 &logthis("<font color=blue>WARNING: "
                   2201:                 ."Rejected client $clientip, closing connection</font>");
1.75      foxr     2202:             }
1.106     foxr     2203: 	}             
1.75      foxr     2204: 
1.1       albertel 2205: # =============================================================================
1.75      foxr     2206:        
                   2207: 	&logthis("<font color=red>CRITICAL: "
                   2208: 		 ."Disconnect from $clientip ($hostid{$clientip})</font>");    
1.106     foxr     2209: 
1.59      www      2210: 
1.1       albertel 2211:         # this exit is VERY important, otherwise the child will become
                   2212:         # a producer of more and more children, forking yourself into
                   2213:         # process death.
                   2214:         exit;
1.106     foxr     2215:     
1.78      foxr     2216: }
                   2217: 
                   2218: 
                   2219: #
                   2220: #   Checks to see if the input roleput request was to set
                   2221: # an author role.  If so, invokes the lchtmldir script to set
                   2222: # up a correct public_html 
                   2223: # Parameters:
                   2224: #    request   - The request sent to the rolesput subchunk.
                   2225: #                We're looking for  /domain/_au
                   2226: #    domain    - The domain in which the user is having roles doctored.
                   2227: #    user      - Name of the user for which the role is being put.
                   2228: #    authtype  - The authentication type associated with the user.
                   2229: #
                   2230: sub ManagePermissions
                   2231: {
                   2232:     my $request = shift;
                   2233:     my $domain  = shift;
                   2234:     my $user    = shift;
                   2235:     my $authtype= shift;
                   2236: 
                   2237:     # See if the request is of the form /$domain/_au
1.134     albertel 2238:     &logthis("ruequest is $request");
1.78      foxr     2239:     if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
                   2240: 	my $execdir = $perlvar{'lonDaemons'};
                   2241: 	my $userhome= "/home/$user" ;
1.134     albertel 2242: 	&logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78      foxr     2243: 	system("$execdir/lchtmldir $userhome $user $authtype");
                   2244:     }
                   2245: }
                   2246: #
                   2247: #   GetAuthType - Determines the authorization type of a user in a domain.
                   2248: 
                   2249: #     Returns the authorization type or nouser if there is no such user.
                   2250: #
                   2251: sub GetAuthType 
                   2252: {
                   2253:     my $domain = shift;
                   2254:     my $user   = shift;
                   2255: 
1.79      foxr     2256:     Debug("GetAuthType( $domain, $user ) \n");
1.78      foxr     2257:     my $proname    = &propath($domain, $user); 
                   2258:     my $passwdfile = "$proname/passwd";
                   2259:     if( -e $passwdfile ) {
                   2260: 	my $pf = IO::File->new($passwdfile);
                   2261: 	my $realpassword = <$pf>;
                   2262: 	chomp($realpassword);
1.79      foxr     2263: 	Debug("Password info = $realpassword\n");
1.78      foxr     2264: 	my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79      foxr     2265: 	Debug("Authtype = $authtype, content = $contentpwd\n");
1.78      foxr     2266: 	my $availinfo = '';
1.91      albertel 2267: 	if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78      foxr     2268: 	    $availinfo = $contentpwd;
                   2269: 	}
1.79      foxr     2270: 
1.78      foxr     2271: 	return "$authtype:$availinfo";
                   2272:     }
                   2273:     else {
1.79      foxr     2274: 	Debug("Returning nouser");
1.78      foxr     2275: 	return "nouser";
                   2276:     }
1.1       albertel 2277: }
                   2278: 
1.84      albertel 2279: sub addline {
                   2280:     my ($fname,$hostid,$ip,$newline)=@_;
                   2281:     my $contents;
                   2282:     my $found=0;
                   2283:     my $expr='^'.$hostid.':'.$ip.':';
                   2284:     $expr =~ s/\./\\\./g;
1.134     albertel 2285:     my $sh;
1.84      albertel 2286:     if ($sh=IO::File->new("$fname.subscription")) {
                   2287: 	while (my $subline=<$sh>) {
                   2288: 	    if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
                   2289: 	}
                   2290: 	$sh->close();
                   2291:     }
                   2292:     $sh=IO::File->new(">$fname.subscription");
                   2293:     if ($contents) { print $sh $contents; }
                   2294:     if ($newline) { print $sh $newline; }
                   2295:     $sh->close();
                   2296:     return $found;
1.86      www      2297: }
                   2298: 
                   2299: sub getchat {
1.122     www      2300:     my ($cdom,$cname,$udom,$uname)=@_;
1.87      www      2301:     my %hash;
                   2302:     my $proname=&propath($cdom,$cname);
                   2303:     my @entries=();
1.88      albertel 2304:     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
                   2305: 	    &GDBM_READER(),0640)) {
                   2306: 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
                   2307: 	untie %hash;
1.123     www      2308:     }
1.124     www      2309:     my @participants=();
1.134     albertel 2310:     my $cutoff=time-60;
1.123     www      2311:     if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124     www      2312: 	    &GDBM_WRCREAT(),0640)) {
                   2313:         $hash{$uname.':'.$udom}=time;
1.123     www      2314:         foreach (sort keys %hash) {
                   2315: 	    if ($hash{$_}>$cutoff) {
1.124     www      2316: 		$participants[$#participants+1]='active_participant:'.$_;
1.123     www      2317:             }
                   2318:         }
                   2319:         untie %hash;
1.86      www      2320:     }
1.124     www      2321:     return (@participants,@entries);
1.86      www      2322: }
                   2323: 
                   2324: sub chatadd {
1.88      albertel 2325:     my ($cdom,$cname,$newchat)=@_;
                   2326:     my %hash;
                   2327:     my $proname=&propath($cdom,$cname);
                   2328:     my @entries=();
1.142     www      2329:     my $time=time;
1.88      albertel 2330:     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
                   2331: 	    &GDBM_WRCREAT(),0640)) {
                   2332: 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
                   2333: 	my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
                   2334: 	my ($thentime,$idnum)=split(/\_/,$lastid);
                   2335: 	my $newid=$time.'_000000';
                   2336: 	if ($thentime==$time) {
                   2337: 	    $idnum=~s/^0+//;
                   2338: 	    $idnum++;
                   2339: 	    $idnum=substr('000000'.$idnum,-6,6);
                   2340: 	    $newid=$time.'_'.$idnum;
                   2341: 	}
                   2342: 	$hash{$newid}=$newchat;
                   2343: 	my $expired=$time-3600;
                   2344: 	foreach (keys %hash) {
                   2345: 	    my ($thistime)=($_=~/(\d+)\_/);
                   2346: 	    if ($thistime<$expired) {
1.89      www      2347: 		delete $hash{$_};
1.88      albertel 2348: 	    }
                   2349: 	}
                   2350: 	untie %hash;
1.142     www      2351:     }
                   2352:     {
                   2353: 	my $hfh;
                   2354: 	if ($hfh=IO::File->new(">>$proname/chatroom.log")) { 
                   2355: 	    print $hfh "$time:".&unescape($newchat)."\n";
                   2356: 	}
1.86      www      2357:     }
1.84      albertel 2358: }
                   2359: 
                   2360: sub unsub {
                   2361:     my ($fname,$clientip)=@_;
                   2362:     my $result;
                   2363:     if (unlink("$fname.$hostid{$clientip}")) {
                   2364: 	$result="ok\n";
                   2365:     } else {
                   2366: 	$result="not_subscribed\n";
                   2367:     }
                   2368:     if (-e "$fname.subscription") {
                   2369: 	my $found=&addline($fname,$hostid{$clientip},$clientip,'');
                   2370: 	if ($found) { $result="ok\n"; }
                   2371:     } else {
                   2372: 	if ($result != "ok\n") { $result="not_subscribed\n"; }
                   2373:     }
                   2374:     return $result;
                   2375: }
                   2376: 
1.101     www      2377: sub currentversion {
                   2378:     my $fname=shift;
                   2379:     my $version=-1;
                   2380:     my $ulsdir='';
                   2381:     if ($fname=~/^(.+)\/[^\/]+$/) {
                   2382:        $ulsdir=$1;
                   2383:     }
1.114     albertel 2384:     my ($fnamere1,$fnamere2);
                   2385:     # remove version if already specified
1.101     www      2386:     $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114     albertel 2387:     # get the bits that go before and after the version number
                   2388:     if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
                   2389: 	$fnamere1=$1;
                   2390: 	$fnamere2='.'.$2;
                   2391:     }
1.101     www      2392:     if (-e $fname) { $version=1; }
                   2393:     if (-e $ulsdir) {
1.134     albertel 2394: 	if(-d $ulsdir) {
                   2395: 	    if (opendir(LSDIR,$ulsdir)) {
                   2396: 		my $ulsfn;
                   2397: 		while ($ulsfn=readdir(LSDIR)) {
1.101     www      2398: # see if this is a regular file (ignore links produced earlier)
1.134     albertel 2399: 		    my $thisfile=$ulsdir.'/'.$ulsfn;
                   2400: 		    unless (-l $thisfile) {
                   2401: 			if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
                   2402: 			    if ($1>$version) { $version=$1; }
                   2403: 			}
                   2404: 		    }
                   2405: 		}
                   2406: 		closedir(LSDIR);
                   2407: 		$version++;
                   2408: 	    }
                   2409: 	}
                   2410:     }
                   2411:     return $version;
1.101     www      2412: }
                   2413: 
                   2414: sub thisversion {
                   2415:     my $fname=shift;
                   2416:     my $version=-1;
                   2417:     if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
                   2418: 	$version=$1;
                   2419:     }
                   2420:     return $version;
                   2421: }
                   2422: 
1.84      albertel 2423: sub subscribe {
                   2424:     my ($userinput,$clientip)=@_;
                   2425:     my $result;
                   2426:     my ($cmd,$fname)=split(/:/,$userinput);
                   2427:     my $ownership=&ishome($fname);
                   2428:     if ($ownership eq 'owner') {
1.101     www      2429: # explitly asking for the current version?
                   2430:         unless (-e $fname) {
                   2431:             my $currentversion=&currentversion($fname);
                   2432: 	    if (&thisversion($fname)==$currentversion) {
                   2433:                 if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
                   2434: 		    my $root=$1;
                   2435:                     my $extension=$2;
                   2436:                     symlink($root.'.'.$extension,
                   2437:                             $root.'.'.$currentversion.'.'.$extension);
1.102     www      2438:                     unless ($extension=~/\.meta$/) {
                   2439:                        symlink($root.'.'.$extension.'.meta',
                   2440:                             $root.'.'.$currentversion.'.'.$extension.'.meta');
                   2441: 		    }
1.101     www      2442:                 }
                   2443:             }
                   2444:         }
1.84      albertel 2445: 	if (-e $fname) {
                   2446: 	    if (-d $fname) {
                   2447: 		$result="directory\n";
                   2448: 	    } else {
                   2449: 		if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1.134     albertel 2450: 		my $now=time;
1.84      albertel 2451: 		my $found=&addline($fname,$hostid{$clientip},$clientip,
                   2452: 				   "$hostid{$clientip}:$clientip:$now\n");
                   2453: 		if ($found) { $result="$fname\n"; }
                   2454: 		# if they were subscribed to only meta data, delete that
                   2455:                 # subscription, when you subscribe to a file you also get
                   2456:                 # the metadata
                   2457: 		unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
                   2458: 		$fname=~s/\/home\/httpd\/html\/res/raw/;
                   2459: 		$fname="http://$thisserver/".$fname;
                   2460: 		$result="$fname\n";
                   2461: 	    }
                   2462: 	} else {
                   2463: 	    $result="not_found\n";
                   2464: 	}
                   2465:     } else {
                   2466: 	$result="rejected\n";
                   2467:     }
                   2468:     return $result;
                   2469: }
1.91      albertel 2470: 
                   2471: sub make_passwd_file {
1.98      foxr     2472:     my ($uname, $umode,$npass,$passfilename)=@_;
1.91      albertel 2473:     my $result="ok\n";
                   2474:     if ($umode eq 'krb4' or $umode eq 'krb5') {
                   2475: 	{
                   2476: 	    my $pf = IO::File->new(">$passfilename");
                   2477: 	    print $pf "$umode:$npass\n";
                   2478: 	}
                   2479:     } elsif ($umode eq 'internal') {
                   2480: 	my $salt=time;
                   2481: 	$salt=substr($salt,6,2);
                   2482: 	my $ncpass=crypt($npass,$salt);
                   2483: 	{
                   2484: 	    &Debug("Creating internal auth");
                   2485: 	    my $pf = IO::File->new(">$passfilename");
                   2486: 	    print $pf "internal:$ncpass\n"; 
                   2487: 	}
                   2488:     } elsif ($umode eq 'localauth') {
                   2489: 	{
                   2490: 	    my $pf = IO::File->new(">$passfilename");
                   2491: 	    print $pf "localauth:$npass\n";
                   2492: 	}
                   2493:     } elsif ($umode eq 'unix') {
                   2494: 	{
                   2495: 	    my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
                   2496: 	    {
                   2497: 		&Debug("Executing external: ".$execpath);
1.98      foxr     2498: 		&Debug("user  = ".$uname.", Password =". $npass);
1.132     matthew  2499: 		my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91      albertel 2500: 		print $se "$uname\n";
                   2501: 		print $se "$npass\n";
                   2502: 		print $se "$npass\n";
1.97      foxr     2503: 	    }
                   2504: 	    my $useraddok = $?;
                   2505: 	    if($useraddok > 0) {
                   2506: 		&logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1.91      albertel 2507: 	    }
                   2508: 	    my $pf = IO::File->new(">$passfilename");
                   2509: 	    print $pf "unix:\n";
                   2510: 	}
                   2511:     } elsif ($umode eq 'none') {
                   2512: 	{
                   2513: 	    my $pf = IO::File->new(">$passfilename");
                   2514: 	    print $pf "none:\n";
                   2515: 	}
                   2516:     } else {
                   2517: 	$result="auth_mode_error\n";
                   2518:     }
                   2519:     return $result;
1.121     albertel 2520: }
                   2521: 
                   2522: sub sethost {
                   2523:     my ($remotereq) = @_;
                   2524:     my (undef,$hostid)=split(/:/,$remotereq);
                   2525:     if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
                   2526:     if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
                   2527: 	$currenthostid=$hostid;
                   2528: 	$currentdomainid=$hostdom{$hostid};
                   2529: 	&logthis("Setting hostid to $hostid, and domain to $currentdomainid");
                   2530:     } else {
                   2531: 	&logthis("Requested host id $hostid not an alias of ".
                   2532: 		 $perlvar{'lonHostID'}." refusing connection");
                   2533: 	return 'unable_to_set';
                   2534:     }
                   2535:     return 'ok';
                   2536: }
                   2537: 
                   2538: sub version {
                   2539:     my ($userinput)=@_;
                   2540:     $remoteVERSION=(split(/:/,$userinput))[1];
                   2541:     return "version:$VERSION";
1.127     albertel 2542: }
                   2543: 
1.128     albertel 2544: #There is a copy of this in lonnet.pm
1.127     albertel 2545: sub userload {
                   2546:     my $numusers=0;
                   2547:     {
                   2548: 	opendir(LONIDS,$perlvar{'lonIDsDir'});
                   2549: 	my $filename;
                   2550: 	my $curtime=time;
                   2551: 	while ($filename=readdir(LONIDS)) {
                   2552: 	    if ($filename eq '.' || $filename eq '..') {next;}
1.138     albertel 2553: 	    my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
                   2554: 	    if ($curtime-$mtime < 3600) { $numusers++; }
1.127     albertel 2555: 	}
                   2556: 	closedir(LONIDS);
                   2557:     }
                   2558:     my $userloadpercent=0;
                   2559:     my $maxuserload=$perlvar{'lonUserLoadLim'};
                   2560:     if ($maxuserload) {
1.129     albertel 2561: 	$userloadpercent=100*$numusers/$maxuserload;
1.127     albertel 2562:     }
1.130     albertel 2563:     $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127     albertel 2564:     return $userloadpercent;
1.91      albertel 2565: }
                   2566: 
1.61      harris41 2567: # ----------------------------------- POD (plain old documentation, CPAN style)
                   2568: 
                   2569: =head1 NAME
                   2570: 
                   2571: lond - "LON Daemon" Server (port "LOND" 5663)
                   2572: 
                   2573: =head1 SYNOPSIS
                   2574: 
1.74      harris41 2575: Usage: B<lond>
                   2576: 
                   2577: Should only be run as user=www.  This is a command-line script which
                   2578: is invoked by B<loncron>.  There is no expectation that a typical user
                   2579: will manually start B<lond> from the command-line.  (In other words,
                   2580: DO NOT START B<lond> YOURSELF.)
1.61      harris41 2581: 
                   2582: =head1 DESCRIPTION
                   2583: 
1.74      harris41 2584: There are two characteristics associated with the running of B<lond>,
                   2585: PROCESS MANAGEMENT (starting, stopping, handling child processes)
                   2586: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
                   2587: subscriptions, etc).  These are described in two large
                   2588: sections below.
                   2589: 
                   2590: B<PROCESS MANAGEMENT>
                   2591: 
1.61      harris41 2592: Preforker - server who forks first. Runs as a daemon. HUPs.
                   2593: Uses IDEA encryption
                   2594: 
1.74      harris41 2595: B<lond> forks off children processes that correspond to the other servers
                   2596: in the network.  Management of these processes can be done at the
                   2597: parent process level or the child process level.
                   2598: 
                   2599: B<logs/lond.log> is the location of log messages.
                   2600: 
                   2601: The process management is now explained in terms of linux shell commands,
                   2602: subroutines internal to this code, and signal assignments:
                   2603: 
                   2604: =over 4
                   2605: 
                   2606: =item *
                   2607: 
                   2608: PID is stored in B<logs/lond.pid>
                   2609: 
                   2610: This is the process id number of the parent B<lond> process.
                   2611: 
                   2612: =item *
                   2613: 
                   2614: SIGTERM and SIGINT
                   2615: 
                   2616: Parent signal assignment:
                   2617:  $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                   2618: 
                   2619: Child signal assignment:
                   2620:  $SIG{INT}  = 'DEFAULT'; (and SIGTERM is DEFAULT also)
                   2621: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
                   2622:  to restart a new child.)
                   2623: 
                   2624: Command-line invocations:
                   2625:  B<kill> B<-s> SIGTERM I<PID>
                   2626:  B<kill> B<-s> SIGINT I<PID>
                   2627: 
                   2628: Subroutine B<HUNTSMAN>:
                   2629:  This is only invoked for the B<lond> parent I<PID>.
                   2630: This kills all the children, and then the parent.
                   2631: The B<lonc.pid> file is cleared.
                   2632: 
                   2633: =item *
                   2634: 
                   2635: SIGHUP
                   2636: 
                   2637: Current bug:
                   2638:  This signal can only be processed the first time
                   2639: on the parent process.  Subsequent SIGHUP signals
                   2640: have no effect.
                   2641: 
                   2642: Parent signal assignment:
                   2643:  $SIG{HUP}  = \&HUPSMAN;
                   2644: 
                   2645: Child signal assignment:
                   2646:  none (nothing happens)
                   2647: 
                   2648: Command-line invocations:
                   2649:  B<kill> B<-s> SIGHUP I<PID>
                   2650: 
                   2651: Subroutine B<HUPSMAN>:
                   2652:  This is only invoked for the B<lond> parent I<PID>,
                   2653: This kills all the children, and then the parent.
                   2654: The B<lond.pid> file is cleared.
                   2655: 
                   2656: =item *
                   2657: 
                   2658: SIGUSR1
                   2659: 
                   2660: Parent signal assignment:
                   2661:  $SIG{USR1} = \&USRMAN;
                   2662: 
                   2663: Child signal assignment:
                   2664:  $SIG{USR1}= \&logstatus;
                   2665: 
                   2666: Command-line invocations:
                   2667:  B<kill> B<-s> SIGUSR1 I<PID>
                   2668: 
                   2669: Subroutine B<USRMAN>:
                   2670:  When invoked for the B<lond> parent I<PID>,
                   2671: SIGUSR1 is sent to all the children, and the status of
                   2672: each connection is logged.
1.144     foxr     2673: 
                   2674: =item *
                   2675: 
                   2676: SIGUSR2
                   2677: 
                   2678: Parent Signal assignment:
                   2679:     $SIG{USR2} = \&UpdateHosts
                   2680: 
                   2681: Child signal assignment:
                   2682:     NONE
                   2683: 
1.74      harris41 2684: 
                   2685: =item *
                   2686: 
                   2687: SIGCHLD
                   2688: 
                   2689: Parent signal assignment:
                   2690:  $SIG{CHLD} = \&REAPER;
                   2691: 
                   2692: Child signal assignment:
                   2693:  none
                   2694: 
                   2695: Command-line invocations:
                   2696:  B<kill> B<-s> SIGCHLD I<PID>
                   2697: 
                   2698: Subroutine B<REAPER>:
                   2699:  This is only invoked for the B<lond> parent I<PID>.
                   2700: Information pertaining to the child is removed.
                   2701: The socket port is cleaned up.
                   2702: 
                   2703: =back
                   2704: 
                   2705: B<SERVER-SIDE ACTIVITIES>
                   2706: 
                   2707: Server-side information can be accepted in an encrypted or non-encrypted
                   2708: method.
                   2709: 
                   2710: =over 4
                   2711: 
                   2712: =item ping
                   2713: 
                   2714: Query a client in the hosts.tab table; "Are you there?"
                   2715: 
                   2716: =item pong
                   2717: 
                   2718: Respond to a ping query.
                   2719: 
                   2720: =item ekey
                   2721: 
                   2722: Read in encrypted key, make cipher.  Respond with a buildkey.
                   2723: 
                   2724: =item load
                   2725: 
                   2726: Respond with CPU load based on a computation upon /proc/loadavg.
                   2727: 
                   2728: =item currentauth
                   2729: 
                   2730: Reply with current authentication information (only over an
                   2731: encrypted channel).
                   2732: 
                   2733: =item auth
                   2734: 
                   2735: Only over an encrypted channel, reply as to whether a user's
                   2736: authentication information can be validated.
                   2737: 
                   2738: =item passwd
                   2739: 
                   2740: Allow for a password to be set.
                   2741: 
                   2742: =item makeuser
                   2743: 
                   2744: Make a user.
                   2745: 
                   2746: =item passwd
                   2747: 
                   2748: Allow for authentication mechanism and password to be changed.
                   2749: 
                   2750: =item home
1.61      harris41 2751: 
1.74      harris41 2752: Respond to a question "are you the home for a given user?"
                   2753: 
                   2754: =item update
                   2755: 
                   2756: Update contents of a subscribed resource.
                   2757: 
                   2758: =item unsubscribe
                   2759: 
                   2760: The server is unsubscribing from a resource.
                   2761: 
                   2762: =item subscribe
                   2763: 
                   2764: The server is subscribing to a resource.
                   2765: 
                   2766: =item log
                   2767: 
                   2768: Place in B<logs/lond.log>
                   2769: 
                   2770: =item put
                   2771: 
                   2772: stores hash in namespace
                   2773: 
                   2774: =item rolesput
                   2775: 
                   2776: put a role into a user's environment
                   2777: 
                   2778: =item get
                   2779: 
                   2780: returns hash with keys from array
                   2781: reference filled in from namespace
                   2782: 
                   2783: =item eget
                   2784: 
                   2785: returns hash with keys from array
                   2786: reference filled in from namesp (encrypts the return communication)
                   2787: 
                   2788: =item rolesget
                   2789: 
                   2790: get a role from a user's environment
                   2791: 
                   2792: =item del
                   2793: 
                   2794: deletes keys out of array from namespace
                   2795: 
                   2796: =item keys
                   2797: 
                   2798: returns namespace keys
                   2799: 
                   2800: =item dump
                   2801: 
                   2802: dumps the complete (or key matching regexp) namespace into a hash
                   2803: 
                   2804: =item store
                   2805: 
                   2806: stores hash permanently
                   2807: for this url; hashref needs to be given and should be a \%hashname; the
                   2808: remaining args aren't required and if they aren't passed or are '' they will
                   2809: be derived from the ENV
                   2810: 
                   2811: =item restore
                   2812: 
                   2813: returns a hash for a given url
                   2814: 
                   2815: =item querysend
                   2816: 
                   2817: Tells client about the lonsql process that has been launched in response
                   2818: to a sent query.
                   2819: 
                   2820: =item queryreply
                   2821: 
                   2822: Accept information from lonsql and make appropriate storage in temporary
                   2823: file space.
                   2824: 
                   2825: =item idput
                   2826: 
                   2827: Defines usernames as corresponding to IDs.  (These "IDs" are unique identifiers
                   2828: for each student, defined perhaps by the institutional Registrar.)
                   2829: 
                   2830: =item idget
                   2831: 
                   2832: Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
                   2833: for each student, defined perhaps by the institutional Registrar.)
                   2834: 
                   2835: =item tmpput
                   2836: 
                   2837: Accept and store information in temporary space.
                   2838: 
                   2839: =item tmpget
                   2840: 
                   2841: Send along temporarily stored information.
                   2842: 
                   2843: =item ls
                   2844: 
                   2845: List part of a user's directory.
                   2846: 
1.135     foxr     2847: =item pushtable
                   2848: 
                   2849: Pushes a file in /home/httpd/lonTab directory.  Currently limited to:
                   2850: hosts.tab and domain.tab. The old file is copied to  *.tab.backup but
                   2851: must be restored manually in case of a problem with the new table file.
                   2852: pushtable requires that the request be encrypted and validated via
                   2853: ValidateManager.  The form of the command is:
                   2854: enc:pushtable tablename <tablecontents> \n
                   2855: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a 
                   2856: cleartext newline.
                   2857: 
1.74      harris41 2858: =item Hanging up (exit or init)
                   2859: 
                   2860: What to do when a client tells the server that they (the client)
                   2861: are leaving the network.
                   2862: 
                   2863: =item unknown command
                   2864: 
                   2865: If B<lond> is sent an unknown command (not in the list above),
                   2866: it replys to the client "unknown_cmd".
1.135     foxr     2867: 
1.74      harris41 2868: 
                   2869: =item UNKNOWN CLIENT
                   2870: 
                   2871: If the anti-spoofing algorithm cannot verify the client,
                   2872: the client is rejected (with a "refused" message sent
                   2873: to the client, and the connection is closed.
                   2874: 
                   2875: =back
1.61      harris41 2876: 
                   2877: =head1 PREREQUISITES
                   2878: 
                   2879: IO::Socket
                   2880: IO::File
                   2881: Apache::File
                   2882: Symbol
                   2883: POSIX
                   2884: Crypt::IDEA
                   2885: LWP::UserAgent()
                   2886: GDBM_File
                   2887: Authen::Krb4
1.91      albertel 2888: Authen::Krb5
1.61      harris41 2889: 
                   2890: =head1 COREQUISITES
                   2891: 
                   2892: =head1 OSNAMES
                   2893: 
                   2894: linux
                   2895: 
                   2896: =head1 SCRIPT CATEGORIES
                   2897: 
                   2898: Server/Process
                   2899: 
                   2900: =cut

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