Annotation of loncom/lond, revision 1.178

1.1       albertel    1: #!/usr/bin/perl
                      2: # The LearningOnline Network
                      3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60      www         4: #
1.178   ! foxr        5: # $Id: lond,v 1.176 2004/02/17 21:02:37 albertel 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
1.167     foxr       13: # the Free Software Foundation; either version 2 of the License, or 
1.60      www        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
1.178   ! foxr       23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
1.60      www        24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
1.161     foxr       27: 
                     28: 
1.60      www        29: # http://www.lon-capa.org/
                     30: #
1.54      harris41   31: 
1.134     albertel   32: use strict;
1.80      harris41   33: use lib '/home/httpd/lib/perl/';
                     34: use LONCAPA::Configuration;
                     35: 
1.1       albertel   36: use IO::Socket;
                     37: use IO::File;
1.126     albertel   38: #use Apache::File;
1.1       albertel   39: use Symbol;
                     40: use POSIX;
                     41: use Crypt::IDEA;
                     42: use LWP::UserAgent();
1.3       www        43: use GDBM_File;
                     44: use Authen::Krb4;
1.91      albertel   45: use Authen::Krb5;
1.49      albertel   46: use lib '/home/httpd/lib/perl/';
                     47: use localauth;
1.143     foxr       48: use File::Copy;
1.169     foxr       49: use LONCAPA::ConfigFileEdit;
1.1       albertel   50: 
1.77      foxr       51: my $DEBUG = 0;		       # Non zero to enable debug log entries.
                     52: 
1.57      www        53: my $status='';
                     54: my $lastlog='';
                     55: 
1.178   ! foxr       56: my $VERSION='$Revision: 1.176 $'; #' stupid emacs
1.121     albertel   57: my $remoteVERSION;
1.115     albertel   58: my $currenthostid;
                     59: my $currentdomainid;
1.134     albertel   60: 
                     61: my $client;
1.140     foxr       62: my $clientip;
1.161     foxr       63: my $clientname;
1.140     foxr       64: 
1.134     albertel   65: my $server;
                     66: my $thisserver;
                     67: 
1.178   ! foxr       68: # 
        !            69: #   Connection type is:
        !            70: #      client                   - All client actions are allowed
        !            71: #      manager                  - only management functions allowed.
        !            72: #      both                     - Both management and client actions are allowed
        !            73: #
1.161     foxr       74: 
1.178   ! foxr       75: my $ConnectionType;
1.161     foxr       76: 
1.178   ! foxr       77: my %hostid;
        !            78: my %hostdom;
        !            79: my %hostip;
1.161     foxr       80: 
1.178   ! foxr       81: my %managers;			# Ip -> manager names
1.161     foxr       82: 
1.178   ! foxr       83: my %perlvar;			# Will have the apache conf defined perl vars.
1.134     albertel   84: 
1.178   ! foxr       85: #
        !            86: #  The array below are password error strings."
        !            87: #
        !            88: my $lastpwderror    = 13;		# Largest error number from lcpasswd.
        !            89: my @passwderrors = ("ok",
        !            90: 		   "lcpasswd must be run as user 'www'",
        !            91: 		   "lcpasswd got incorrect number of arguments",
        !            92: 		   "lcpasswd did not get the right nubmer of input text lines",
        !            93: 		   "lcpasswd too many simultaneous pwd changes in progress",
        !            94: 		   "lcpasswd User does not exist.",
        !            95: 		   "lcpasswd Incorrect current passwd",
        !            96: 		   "lcpasswd Unable to su to root.",
        !            97: 		   "lcpasswd Cannot set new passwd.",
        !            98: 		   "lcpasswd Username has invalid characters",
        !            99: 		   "lcpasswd Invalid characters in password",
        !           100: 		    "11", "12",
        !           101: 		    "lcpasswd Password mismatch");
1.97      foxr      102: 
                    103: 
1.178   ! foxr      104: #  The array below are lcuseradd error strings.:
1.97      foxr      105: 
1.178   ! foxr      106: my $lastadderror = 13;
        !           107: my @adderrors    = ("ok",
        !           108: 		    "User ID mismatch, lcuseradd must run as user www",
        !           109: 		    "lcuseradd Incorrect number of command line parameters must be 3",
        !           110: 		    "lcuseradd Incorrect number of stdinput lines, must be 3",
        !           111: 		    "lcuseradd Too many other simultaneous pwd changes in progress",
        !           112: 		    "lcuseradd User does not exist",
        !           113: 		    "lcuseradd Unable to make www member of users's group",
        !           114: 		    "lcuseradd Unable to su to root",
        !           115: 		    "lcuseradd Unable to set password",
        !           116: 		    "lcuseradd Usrname has invalid characters",
        !           117: 		    "lcuseradd Password has an invalid character",
        !           118: 		    "lcuseradd User already exists",
        !           119: 		    "lcuseradd Could not add user.",
        !           120: 		    "lcuseradd Password mismatch");
1.97      foxr      121: 
1.96      foxr      122: 
                    123: #
1.140     foxr      124: #   GetCertificate: Given a transaction that requires a certificate,
                    125: #   this function will extract the certificate from the transaction
                    126: #   request.  Note that at this point, the only concept of a certificate
                    127: #   is the hostname to which we are connected.
                    128: #
                    129: #   Parameter:
                    130: #      request   - The request sent by our client (this parameterization may
                    131: #                  need to change when we really use a certificate granting
                    132: #                  authority.
                    133: #
                    134: sub GetCertificate {
                    135:     my $request = shift;
                    136: 
                    137:     return $clientip;
                    138: }
1.161     foxr      139: 
1.178   ! foxr      140: #
        !           141: #   Return true if client is a manager.
        !           142: #
        !           143: sub isManager {
        !           144:     return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
        !           145: }
        !           146: #
        !           147: #   Return tru if client can do client functions
        !           148: #
        !           149: sub isClient {
        !           150:     return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
        !           151: }
1.161     foxr      152: 
                    153: 
1.156     foxr      154: #
                    155: #   ReadManagerTable: Reads in the current manager table. For now this is
                    156: #                     done on each manager authentication because:
                    157: #                     - These authentications are not frequent
                    158: #                     - This allows dynamic changes to the manager table
                    159: #                       without the need to signal to the lond.
                    160: #
                    161: 
                    162: sub ReadManagerTable {
                    163: 
                    164:     #   Clean out the old table first..
                    165: 
1.166     foxr      166:    foreach my $key (keys %managers) {
                    167:       delete $managers{$key};
                    168:    }
                    169: 
                    170:    my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
                    171:    if (!open (MANAGERS, $tablename)) {
                    172:       logthis('<font color="red">No manager table.  Nobody can manage!!</font>');
                    173:       return;
                    174:    }
                    175:    while(my $host = <MANAGERS>) {
                    176:       chomp($host);
                    177:       if ($host =~ "^#") {                  # Comment line.
                    178:          logthis('<font color="green"> Skipping line: '. "$host</font>\n");
                    179:          next;
                    180:       }
                    181:       if (!defined $hostip{$host}) { # This is a non cluster member
1.161     foxr      182: 	    #  The entry is of the form:
                    183: 	    #    cluname:hostname
                    184: 	    #  cluname - A 'cluster hostname' is needed in order to negotiate
                    185: 	    #            the host key.
                    186: 	    #  hostname- The dns name of the host.
                    187: 	    #
1.166     foxr      188:           my($cluname, $dnsname) = split(/:/, $host);
                    189:           
                    190:           my $ip = gethostbyname($dnsname);
                    191:           if(defined($ip)) {                 # bad names don't deserve entry.
                    192:             my $hostip = inet_ntoa($ip);
                    193:             $managers{$hostip} = $cluname;
                    194:             logthis('<font color="green"> registering manager '.
                    195:                     "$dnsname as $cluname with $hostip </font>\n");
                    196:          }
                    197:       } else {
                    198:          logthis('<font color="green"> existing host'." $host</font>\n");
                    199:          $managers{$hostip{$host}} = $host;  # Use info from cluster tab if clumemeber
                    200:       }
                    201:    }
1.156     foxr      202: }
1.140     foxr      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: 
1.163     foxr      214:     return isManager;
1.140     foxr      215: }
                    216: #
1.143     foxr      217: #  CopyFile:  Called as part of the process of installing a 
                    218: #             new configuration file.  This function copies an existing
                    219: #             file to a backup file.
                    220: # Parameters:
                    221: #     oldfile  - Name of the file to backup.
                    222: #     newfile  - Name of the backup file.
                    223: # Return:
                    224: #     0   - Failure (errno has failure reason).
                    225: #     1   - Success.
                    226: #
                    227: sub CopyFile {
                    228:     my $oldfile = shift;
                    229:     my $newfile = shift;
                    230: 
                    231:     #  The file must exist:
                    232: 
                    233:     if(-e $oldfile) {
                    234: 
                    235: 	 # Read the old file.
                    236: 
                    237: 	my $oldfh = IO::File->new("< $oldfile");
                    238: 	if(!$oldfh) {
                    239: 	    return 0;
                    240: 	}
                    241: 	my @contents = <$oldfh>;  # Suck in the entire file.
                    242: 
                    243: 	# write the backup file:
                    244: 
                    245: 	my $newfh = IO::File->new("> $newfile");
                    246: 	if(!(defined $newfh)){
                    247: 	    return 0;
                    248: 	}
                    249: 	my $lines = scalar @contents;
                    250: 	for (my $i =0; $i < $lines; $i++) {
                    251: 	    print $newfh ($contents[$i]);
                    252: 	}
                    253: 
                    254: 	$oldfh->close;
                    255: 	$newfh->close;
                    256: 
                    257: 	chmod(0660, $newfile);
                    258: 
                    259: 	return 1;
                    260: 	    
                    261:     } else {
                    262: 	return 0;
                    263:     }
                    264: }
1.157     foxr      265: #
                    266: #  Host files are passed out with externally visible host IPs.
                    267: #  If, for example, we are behind a fire-wall or NAT host, our 
                    268: #  internally visible IP may be different than the externally
                    269: #  visible IP.  Therefore, we always adjust the contents of the
                    270: #  host file so that the entry for ME is the IP that we believe
                    271: #  we have.  At present, this is defined as the entry that
                    272: #  DNS has for us.  If by some chance we are not able to get a
                    273: #  DNS translation for us, then we assume that the host.tab file
                    274: #  is correct.  
                    275: #    BUGBUGBUG - in the future, we really should see if we can
                    276: #       easily query the interface(s) instead.
                    277: # Parameter(s):
                    278: #     contents    - The contents of the host.tab to check.
                    279: # Returns:
                    280: #     newcontents - The adjusted contents.
                    281: #
                    282: #
                    283: sub AdjustHostContents {
                    284:     my $contents  = shift;
                    285:     my $adjusted;
                    286:     my $me        = $perlvar{'lonHostID'};
                    287: 
1.166     foxr      288:  foreach my $line (split(/\n/,$contents)) {
1.157     foxr      289: 	if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
                    290: 	    chomp($line);
                    291: 	    my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
                    292: 	    if ($id eq $me) {
1.166     foxr      293:           my $ip = gethostbyname($name);
                    294:           my $ipnew = inet_ntoa($ip);
                    295:          $ip = $ipnew;
1.157     foxr      296: 		#  Reconstruct the host line and append to adjusted:
                    297: 		
1.166     foxr      298: 		   my $newline = "$id:$domain:$role:$name:$ip";
                    299: 		   if($maxcon ne "") { # Not all hosts have loncnew tuning params
                    300: 		     $newline .= ":$maxcon:$idleto:$mincon";
                    301: 		   }
                    302: 		   $adjusted .= $newline."\n";
1.157     foxr      303: 		
1.166     foxr      304:       } else {		# Not me, pass unmodified.
                    305: 		   $adjusted .= $line."\n";
                    306:       }
1.157     foxr      307: 	} else {                  # Blank or comment never re-written.
                    308: 	    $adjusted .= $line."\n";	# Pass blanks and comments as is.
                    309: 	}
1.166     foxr      310:  }
                    311:  return $adjusted;
1.157     foxr      312: }
1.143     foxr      313: #
                    314: #   InstallFile: Called to install an administrative file:
                    315: #       - The file is created with <name>.tmp
                    316: #       - The <name>.tmp file is then mv'd to <name>
                    317: #   This lugubrious procedure is done to ensure that we are never without
                    318: #   a valid, even if dated, version of the file regardless of who crashes
                    319: #   and when the crash occurs.
                    320: #
                    321: #  Parameters:
                    322: #       Name of the file
                    323: #       File Contents.
                    324: #  Return:
                    325: #      nonzero - success.
                    326: #      0       - failure and $! has an errno.
                    327: #
                    328: sub InstallFile {
                    329:     my $Filename = shift;
                    330:     my $Contents = shift;
                    331:     my $TempFile = $Filename.".tmp";
                    332: 
                    333:     #  Open the file for write:
                    334: 
                    335:     my $fh = IO::File->new("> $TempFile"); # Write to temp.
                    336:     if(!(defined $fh)) {
                    337: 	&logthis('<font color="red"> Unable to create '.$TempFile."</font>");
                    338: 	return 0;
                    339:     }
                    340:     #  write the contents of the file:
                    341: 
                    342:     print $fh ($Contents); 
                    343:     $fh->close;			# In case we ever have a filesystem w. locking
                    344: 
                    345:     chmod(0660, $TempFile);
                    346: 
                    347:     # Now we can move install the file in position.
                    348:     
                    349:     move($TempFile, $Filename);
                    350: 
                    351:     return 1;
                    352: }
1.169     foxr      353: #
                    354: #   ConfigFileFromSelector: converts a configuration file selector
                    355: #                 (one of host or domain at this point) into a 
                    356: #                 configuration file pathname.
                    357: #
                    358: #  Parameters:
                    359: #      selector  - Configuration file selector.
                    360: #  Returns:
                    361: #      Full path to the file or undef if the selector is invalid.
                    362: #
                    363: sub ConfigFileFromSelector {
                    364:     my $selector   = shift;
                    365:     my $tablefile;
                    366: 
                    367:     my $tabledir = $perlvar{'lonTabDir'}.'/';
                    368:     if ($selector eq "hosts") {
                    369: 	$tablefile = $tabledir."hosts.tab";
                    370:     } elsif ($selector eq "domain") {
                    371: 	$tablefile = $tabledir."domain.tab";
                    372:     } else {
                    373: 	return undef;
                    374:     }
                    375:     return $tablefile;
1.143     foxr      376: 
1.169     foxr      377: }
1.143     foxr      378: #
1.141     foxr      379: #   PushFile:  Called to do an administrative push of a file.
                    380: #              - Ensure the file being pushed is one we support.
                    381: #              - Backup the old file to <filename.saved>
                    382: #              - Separate the contents of the new file out from the
                    383: #                rest of the request.
                    384: #              - Write the new file.
                    385: #  Parameter:
                    386: #     Request - The entire user request.  This consists of a : separated
                    387: #               string pushfile:tablename:contents.
                    388: #     NOTE:  The contents may have :'s in it as well making things a bit
                    389: #            more interesting... but not much.
                    390: #  Returns:
                    391: #     String to send to client ("ok" or "refused" if bad file).
                    392: #
                    393: sub PushFile {
                    394:     my $request = shift;    
                    395:     my ($command, $filename, $contents) = split(":", $request, 3);
                    396:     
                    397:     #  At this point in time, pushes for only the following tables are
                    398:     #  supported:
                    399:     #   hosts.tab  ($filename eq host).
                    400:     #   domain.tab ($filename eq domain).
                    401:     # Construct the destination filename or reject the request.
                    402:     #
                    403:     # lonManage is supposed to ensure this, however this session could be
                    404:     # part of some elaborate spoof that managed somehow to authenticate.
                    405:     #
                    406: 
1.169     foxr      407: 
                    408:     my $tablefile = ConfigFileFromSelector($filename);
                    409:     if(! (defined $tablefile)) {
1.141     foxr      410: 	return "refused";
                    411:     }
                    412:     #
                    413:     # >copy< the old table to the backup table
                    414:     #        don't rename in case system crashes/reboots etc. in the time
                    415:     #        window between a rename and write.
                    416:     #
                    417:     my $backupfile = $tablefile;
                    418:     $backupfile    =~ s/\.tab$/.old/;
1.143     foxr      419:     if(!CopyFile($tablefile, $backupfile)) {
                    420: 	&logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
                    421: 	return "error:$!";
                    422:     }
1.141     foxr      423:     &logthis('<font color="green"> Pushfile: backed up '
                    424: 	    .$tablefile." to $backupfile</font>");
                    425:     
1.157     foxr      426:     #  If the file being pushed is the host file, we adjust the entry for ourself so that the
                    427:     #  IP will be our current IP as looked up in dns.  Note this is only 99% good as it's possible
                    428:     #  to conceive of conditions where we don't have a DNS entry locally.  This is possible in a 
                    429:     #  network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
                    430:     #  that possibilty.
                    431: 
                    432:     if($filename eq "host") {
                    433: 	$contents = AdjustHostContents($contents);
                    434:     }
                    435: 
1.141     foxr      436:     #  Install the new file:
                    437: 
1.143     foxr      438:     if(!InstallFile($tablefile, $contents)) {
                    439: 	&logthis('<font color="red"> Pushfile: unable to install '
1.145     foxr      440: 	 .$tablefile." $! </font>");
1.143     foxr      441: 	return "error:$!";
                    442:     }
                    443:     else {
                    444: 	&logthis('<font color="green"> Installed new '.$tablefile
                    445: 		 ."</font>");
                    446: 
                    447:     }
                    448: 
1.141     foxr      449: 
                    450:     #  Indicate success:
                    451:  
                    452:     return "ok";
                    453: 
                    454: }
1.145     foxr      455: 
                    456: #
                    457: #  Called to re-init either lonc or lond.
                    458: #
                    459: #  Parameters:
                    460: #    request   - The full request by the client.  This is of the form
                    461: #                reinit:<process>  
                    462: #                where <process> is allowed to be either of 
                    463: #                lonc or lond
                    464: #
                    465: #  Returns:
                    466: #     The string to be sent back to the client either:
                    467: #   ok         - Everything worked just fine.
                    468: #   error:why  - There was a failure and why describes the reason.
                    469: #
                    470: #
                    471: sub ReinitProcess {
                    472:     my $request = shift;
                    473: 
1.146     foxr      474: 
                    475:     # separate the request (reinit) from the process identifier and
                    476:     # validate it producing the name of the .pid file for the process.
                    477:     #
                    478:     #
                    479:     my ($junk, $process) = split(":", $request);
1.147     foxr      480:     my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146     foxr      481:     if($process eq 'lonc') {
                    482: 	$processpidfile = $processpidfile."lonc.pid";
1.147     foxr      483: 	if (!open(PIDFILE, "< $processpidfile")) {
                    484: 	    return "error:Open failed for $processpidfile";
                    485: 	}
                    486: 	my $loncpid = <PIDFILE>;
                    487: 	close(PIDFILE);
                    488: 	logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
                    489: 		."</font>");
                    490: 	kill("USR2", $loncpid);
1.146     foxr      491:     } elsif ($process eq 'lond') {
1.147     foxr      492: 	logthis('<font color="red"> Reinitializing self (lond) </font>');
                    493: 	&UpdateHosts;			# Lond is us!!
1.146     foxr      494:     } else {
                    495: 	&logthis('<font color="yellow" Invalid reinit request for '.$process
                    496: 		 ."</font>");
                    497: 	return "error:Invalid process identifier $process";
                    498:     }
1.145     foxr      499:     return 'ok';
                    500: }
1.168     foxr      501: #   Validate a line in a configuration file edit script:
                    502: #   Validation includes:
                    503: #     - Ensuring the command is valid.
                    504: #     - Ensuring the command has sufficient parameters
                    505: #   Parameters:
                    506: #     scriptline - A line to validate (\n has been stripped for what it's worth).
1.167     foxr      507: #
1.168     foxr      508: #   Return:
                    509: #      0     - Invalid scriptline.
                    510: #      1     - Valid scriptline
                    511: #  NOTE:
                    512: #     Only the command syntax is checked, not the executability of the
                    513: #     command.
                    514: #
                    515: sub isValidEditCommand {
                    516:     my $scriptline = shift;
                    517: 
                    518:     #   Line elements are pipe separated:
                    519: 
                    520:     my ($command, $key, $newline)  = split(/\|/, $scriptline);
                    521:     &logthis('<font color="green"> isValideditCommand checking: '.
                    522: 	     "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
                    523:     
                    524:     if ($command eq "delete") {
                    525: 	#
                    526: 	#   key with no newline.
                    527: 	#
                    528: 	if( ($key eq "") || ($newline ne "")) {
                    529: 	    return 0;		# Must have key but no newline.
                    530: 	} else {
                    531: 	    return 1;		# Valid syntax.
                    532: 	}
1.169     foxr      533:     } elsif ($command eq "replace") {
1.168     foxr      534: 	#
                    535: 	#   key and newline:
                    536: 	#
                    537: 	if (($key eq "") || ($newline eq "")) {
                    538: 	    return 0;
                    539: 	} else {
                    540: 	    return 1;
                    541: 	}
1.169     foxr      542:     } elsif ($command eq "append") {
                    543: 	if (($key ne "") && ($newline eq "")) {
                    544: 	    return 1;
                    545: 	} else {
                    546: 	    return 0;
                    547: 	}
1.168     foxr      548:     } else {
                    549: 	return 0;		# Invalid command.
                    550:     }
                    551:     return 0;			# Should not get here!!!
                    552: }
1.169     foxr      553: #
                    554: #   ApplyEdit - Applies an edit command to a line in a configuration 
                    555: #               file.  It is the caller's responsiblity to validate the
                    556: #               edit line.
                    557: #   Parameters:
                    558: #      $directive - A single edit directive to apply.  
                    559: #                   Edit directives are of the form:
                    560: #                  append|newline      - Appends a new line to the file.
                    561: #                  replace|key|newline - Replaces the line with key value 'key'
                    562: #                  delete|key          - Deletes the line with key value 'key'.
                    563: #      $editor   - A config file editor object that contains the
                    564: #                  file being edited.
                    565: #
                    566: sub ApplyEdit {
                    567:     my $directive   = shift;
                    568:     my $editor      = shift;
                    569: 
                    570:     # Break the directive down into its command and its parameters
                    571:     # (at most two at this point.  The meaning of the parameters, if in fact
                    572:     #  they exist depends on the command).
                    573: 
                    574:     my ($command, $p1, $p2) = split(/\|/, $directive);
                    575: 
                    576:     if($command eq "append") {
                    577: 	$editor->Append($p1);	          # p1 - key p2 null.
                    578:     } elsif ($command eq "replace") {
                    579: 	$editor->ReplaceLine($p1, $p2);   # p1 - key p2 = newline.
                    580:     } elsif ($command eq "delete") {
                    581: 	$editor->DeleteLine($p1);         # p1 - key p2 null.
                    582:     } else {			          # Should not get here!!!
                    583: 	die "Invalid command given to ApplyEdit $command"
                    584:     }
                    585: }
                    586: #
                    587: # AdjustOurHost:
                    588: #           Adjusts a host file stored in a configuration file editor object
                    589: #           for the true IP address of this host. This is necessary for hosts
                    590: #           that live behind a firewall.
                    591: #           Those hosts have a publicly distributed IP of the firewall, but
                    592: #           internally must use their actual IP.  We assume that a given
                    593: #           host only has a single IP interface for now.
                    594: # Formal Parameters:
                    595: #     editor   - The configuration file editor to adjust.  This
                    596: #                editor is assumed to contain a hosts.tab file.
                    597: # Strategy:
                    598: #    - Figure out our hostname.
                    599: #    - Lookup the entry for this host.
                    600: #    - Modify the line to contain our IP
                    601: #    - Do a replace for this host.
                    602: sub AdjustOurHost {
                    603:     my $editor        = shift;
                    604: 
                    605:     # figure out who I am.
                    606: 
                    607:     my $myHostName    = $perlvar{'lonHostID'}; # LonCAPA hostname.
                    608: 
                    609:     #  Get my host file entry.
                    610: 
                    611:     my $ConfigLine    = $editor->Find($myHostName);
                    612:     if(! (defined $ConfigLine)) {
                    613: 	die "AdjustOurHost - no entry for me in hosts file $myHostName";
                    614:     }
                    615:     # figure out my IP:
                    616:     #   Use the config line to get my hostname.
                    617:     #   Use gethostbyname to translate that into an IP address.
                    618:     #
                    619:     my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
                    620:     my $BinaryIp = gethostbyname($name);
                    621:     my $ip       = inet_ntoa($ip);
                    622:     #
                    623:     #  Reassemble the config line from the elements in the list.
                    624:     #  Note that if the loncnew items were not present before, they will
                    625:     #  be now even if they would be empty
                    626:     #
                    627:     my $newConfigLine = $id;
                    628:     foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
                    629: 	$newConfigLine .= ":".$item;
                    630:     }
                    631:     #  Replace the line:
                    632: 
                    633:     $editor->ReplaceLine($id, $newConfigLine);
                    634:     
                    635: }
                    636: #
                    637: #   ReplaceConfigFile:
                    638: #              Replaces a configuration file with the contents of a
                    639: #              configuration file editor object.
                    640: #              This is done by:
                    641: #              - Copying the target file to <filename>.old
                    642: #              - Writing the new file to <filename>.tmp
                    643: #              - Moving <filename.tmp>  -> <filename>
                    644: #              This laborious process ensures that the system is never without
                    645: #              a configuration file that's at least valid (even if the contents
                    646: #              may be dated).
                    647: #   Parameters:
                    648: #        filename   - Name of the file to modify... this is a full path.
                    649: #        editor     - Editor containing the file.
                    650: #
                    651: sub ReplaceConfigFile {
                    652:     my $filename  = shift;
                    653:     my $editor    = shift;
1.168     foxr      654: 
1.169     foxr      655:     CopyFile ($filename, $filename.".old");
                    656: 
                    657:     my $contents  = $editor->Get(); # Get the contents of the file.
                    658: 
                    659:     InstallFile($filename, $contents);
                    660: }
1.168     foxr      661: #   
                    662: #
                    663: #   Called to edit a configuration table  file
1.167     foxr      664: #   Parameters:
                    665: #      request           - The entire command/request sent by lonc or lonManage
                    666: #   Return:
                    667: #      The reply to send to the client.
1.168     foxr      668: #
1.167     foxr      669: sub EditFile {
                    670:     my $request = shift;
                    671: 
                    672:     #  Split the command into it's pieces:  edit:filetype:script
                    673: 
1.168     foxr      674:     my ($request, $filetype, $script) = split(/:/, $request,3);	# : in script
1.167     foxr      675: 
                    676:     #  Check the pre-coditions for success:
                    677: 
                    678:     if($request != "edit") {	# Something is amiss afoot alack.
                    679: 	return "error:edit request detected, but request != 'edit'\n";
                    680:     }
                    681:     if( ($filetype ne "hosts")  &&
                    682: 	($filetype ne "domain")) {
                    683: 	return "error:edit requested with invalid file specifier: $filetype \n";
                    684:     }
                    685: 
                    686:     #   Split the edit script and check it's validity.
1.168     foxr      687: 
                    688:     my @scriptlines = split(/\n/, $script);  # one line per element.
                    689:     my $linecount   = scalar(@scriptlines);
                    690:     for(my $i = 0; $i < $linecount; $i++) {
                    691: 	chomp($scriptlines[$i]);
                    692: 	if(!isValidEditCommand($scriptlines[$i])) {
                    693: 	    return "error:edit with bad script line: '$scriptlines[$i]' \n";
                    694: 	}
                    695:     }
1.145     foxr      696: 
1.167     foxr      697:     #   Execute the edit operation.
1.169     foxr      698:     #   - Create a config file editor for the appropriate file and 
                    699:     #   - execute each command in the script:
                    700:     #
                    701:     my $configfile = ConfigFileFromSelector($filetype);
                    702:     if (!(defined $configfile)) {
                    703: 	return "refused\n";
                    704:     }
                    705:     my $editor = ConfigFileEdit->new($configfile);
1.167     foxr      706: 
1.169     foxr      707:     for (my $i = 0; $i < $linecount; $i++) {
                    708: 	ApplyEdit($scriptlines[$i], $editor);
                    709:     }
                    710:     # If the file is the host file, ensure that our host is
                    711:     # adjusted to have our ip:
                    712:     #
                    713:     if($filetype eq "host") {
                    714: 	AdjustOurHost($editor);
                    715:     }
                    716:     #  Finally replace the current file with our file.
                    717:     #
                    718:     ReplaceConfigFile($configfile, $editor);
1.167     foxr      719: 
                    720:     return "ok\n";
                    721: }
1.141     foxr      722: #
1.96      foxr      723: #  Convert an error return code from lcpasswd to a string value.
                    724: #
                    725: sub lcpasswdstrerror {
                    726:     my $ErrorCode = shift;
1.97      foxr      727:     if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96      foxr      728: 	return "lcpasswd Unrecognized error return value ".$ErrorCode;
                    729:     } else {
1.98      foxr      730: 	return $passwderrors[$ErrorCode];
1.96      foxr      731:     }
                    732: }
                    733: 
1.97      foxr      734: #
                    735: # Convert an error return code from lcuseradd to a string value:
                    736: #
                    737: sub lcuseraddstrerror {
                    738:     my $ErrorCode = shift;
                    739:     if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
                    740: 	return "lcuseradd - Unrecognized error code: ".$ErrorCode;
                    741:     } else {
1.98      foxr      742: 	return $adderrors[$ErrorCode];
1.97      foxr      743:     }
                    744: }
                    745: 
1.23      harris41  746: # grabs exception and records it to log before exiting
                    747: sub catchexception {
1.27      albertel  748:     my ($error)=@_;
1.25      www       749:     $SIG{'QUIT'}='DEFAULT';
                    750:     $SIG{__DIE__}='DEFAULT';
1.165     albertel  751:     &status("Catching exception");
1.23      harris41  752:     &logthis("<font color=red>CRITICAL: "
1.134     albertel  753:      ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27      albertel  754:      ."a crash with this error msg->[$error]</font>");
1.57      www       755:     &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27      albertel  756:     if ($client) { print $client "error: $error\n"; }
1.59      www       757:     $server->close();
1.27      albertel  758:     die($error);
1.23      harris41  759: }
                    760: 
1.63      www       761: sub timeout {
1.165     albertel  762:     &status("Handling Timeout");
1.63      www       763:     &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
                    764:     &catchexception('Timeout');
                    765: }
1.22      harris41  766: # -------------------------------- Set signal handlers to record abnormal exits
                    767: 
                    768: $SIG{'QUIT'}=\&catchexception;
                    769: $SIG{__DIE__}=\&catchexception;
                    770: 
1.81      matthew   771: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95      harris41  772: &status("Read loncapa.conf and loncapa_apache.conf");
                    773: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141     foxr      774: %perlvar=%{$perlvarref};
1.80      harris41  775: undef $perlvarref;
1.19      www       776: 
1.35      harris41  777: # ----------------------------- Make sure this process is running from user=www
                    778: my $wwwid=getpwnam('www');
                    779: if ($wwwid!=$<) {
1.134     albertel  780:    my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
                    781:    my $subj="LON: $currenthostid User ID mismatch";
1.37      harris41  782:    system("echo 'User ID mismatch.  lond must be run as user www.' |\
1.35      harris41  783:  mailto $emailto -s '$subj' > /dev/null");
                    784:    exit 1;
                    785: }
                    786: 
1.19      www       787: # --------------------------------------------- Check if other instance running
                    788: 
                    789: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
                    790: 
                    791: if (-e $pidfile) {
                    792:    my $lfh=IO::File->new("$pidfile");
                    793:    my $pide=<$lfh>;
                    794:    chomp($pide);
1.29      harris41  795:    if (kill 0 => $pide) { die "already running"; }
1.19      www       796: }
1.1       albertel  797: 
                    798: # ------------------------------------------------------------- Read hosts file
                    799: 
                    800: 
                    801: 
                    802: # establish SERVER socket, bind and listen.
                    803: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
                    804:                                 Type      => SOCK_STREAM,
                    805:                                 Proto     => 'tcp',
                    806:                                 Reuse     => 1,
                    807:                                 Listen    => 10 )
1.29      harris41  808:   or die "making socket: $@\n";
1.1       albertel  809: 
                    810: # --------------------------------------------------------- Do global variables
                    811: 
                    812: # global variables
                    813: 
1.134     albertel  814: my %children               = ();       # keys are current child process IDs
1.1       albertel  815: 
                    816: sub REAPER {                        # takes care of dead children
                    817:     $SIG{CHLD} = \&REAPER;
1.165     albertel  818:     &status("Handling child death");
1.178   ! foxr      819:     my $pid;
        !           820:     do {
        !           821: 	$pid = waitpid(-1,&WNOHANG());
        !           822: 	if (defined($children{$pid})) {
        !           823: 	    &logthis("Child $pid died");
        !           824: 	    delete($children{$pid});
        !           825: 	} else {
        !           826: 	    &logthis("Unknown Child $pid died");
        !           827: 	}
        !           828:     } while ( $pid > 0 );
        !           829:     foreach my $child (keys(%children)) {
        !           830: 	$pid = waitpid($child,&WNOHANG());
        !           831: 	if ($pid > 0) {
        !           832: 	    &logthis("Child $child - $pid looks like we missed it's death");
        !           833: 	    delete($children{$pid});
        !           834: 	}
1.176     albertel  835:     }
1.165     albertel  836:     &status("Finished Handling child death");
1.1       albertel  837: }
                    838: 
                    839: sub HUNTSMAN {                      # signal handler for SIGINT
1.165     albertel  840:     &status("Killing children (INT)");
1.1       albertel  841:     local($SIG{CHLD}) = 'IGNORE';   # we're going to kill our children
                    842:     kill 'INT' => keys %children;
1.59      www       843:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1       albertel  844:     my $execdir=$perlvar{'lonDaemons'};
                    845:     unlink("$execdir/logs/lond.pid");
1.9       www       846:     &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.165     albertel  847:     &status("Done killing children");
1.1       albertel  848:     exit;                           # clean up with dignity
                    849: }
                    850: 
                    851: sub HUPSMAN {                      # signal handler for SIGHUP
                    852:     local($SIG{CHLD}) = 'IGNORE';  # we're going to kill our children
1.165     albertel  853:     &status("Killing children for restart (HUP)");
1.1       albertel  854:     kill 'INT' => keys %children;
1.59      www       855:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9       www       856:     &logthis("<font color=red>CRITICAL: Restarting</font>");
1.134     albertel  857:     my $execdir=$perlvar{'lonDaemons'};
1.30      harris41  858:     unlink("$execdir/logs/lond.pid");
1.165     albertel  859:     &status("Restarting self (HUP)");
1.1       albertel  860:     exec("$execdir/lond");         # here we go again
                    861: }
                    862: 
1.144     foxr      863: #
1.148     foxr      864: #    Kill off hashes that describe the host table prior to re-reading it.
                    865: #    Hashes affected are:
                    866: #       %hostid, %hostdom %hostip
                    867: #
                    868: sub KillHostHashes {
                    869:     foreach my $key (keys %hostid) {
                    870: 	delete $hostid{$key};
                    871:     }
                    872:     foreach my $key (keys %hostdom) {
                    873: 	delete $hostdom{$key};
                    874:     }
                    875:     foreach my $key (keys %hostip) {
                    876: 	delete $hostip{$key};
                    877:     }
                    878: }
                    879: #
                    880: #   Read in the host table from file and distribute it into the various hashes:
                    881: #
                    882: #    - %hostid  -  Indexed by IP, the loncapa hostname.
                    883: #    - %hostdom -  Indexed by  loncapa hostname, the domain.
                    884: #    - %hostip  -  Indexed by hostid, the Ip address of the host.
                    885: sub ReadHostTable {
                    886: 
                    887:     open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
                    888:     
                    889:     while (my $configline=<CONFIG>) {
1.178   ! foxr      890: 	if (!($configline =~ /^\s*\#/)) {
        !           891: 	    my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
        !           892: 	    chomp($ip); $ip=~s/\D+$//;
        !           893: 	    $hostid{$ip}=$id;
        !           894: 	    $hostdom{$id}=$domain;
        !           895: 	    $hostip{$id}=$ip;
        !           896: 	    if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
        !           897: 	}
1.148     foxr      898:     }
                    899:     close(CONFIG);
                    900: }
                    901: #
                    902: #  Reload the Apache daemon's state.
1.150     foxr      903: #  This is done by invoking /home/httpd/perl/apachereload
                    904: #  a setuid perl script that can be root for us to do this job.
1.148     foxr      905: #
                    906: sub ReloadApache {
1.150     foxr      907:     my $execdir = $perlvar{'lonDaemons'};
                    908:     my $script  = $execdir."/apachereload";
                    909:     system($script);
1.148     foxr      910: }
                    911: 
                    912: #
1.144     foxr      913: #   Called in response to a USR2 signal.
                    914: #   - Reread hosts.tab
                    915: #   - All children connected to hosts that were removed from hosts.tab
                    916: #     are killed via SIGINT
                    917: #   - All children connected to previously existing hosts are sent SIGUSR1
                    918: #   - Our internal hosts hash is updated to reflect the new contents of
                    919: #     hosts.tab causing connections from hosts added to hosts.tab to
                    920: #     now be honored.
                    921: #
                    922: sub UpdateHosts {
1.165     albertel  923:     &status("Reload hosts.tab");
1.147     foxr      924:     logthis('<font color="blue"> Updating connections </font>');
1.148     foxr      925:     #
                    926:     #  The %children hash has the set of IP's we currently have children
                    927:     #  on.  These need to be matched against records in the hosts.tab
                    928:     #  Any ip's no longer in the table get killed off they correspond to
                    929:     #  either dropped or changed hosts.  Note that the re-read of the table
                    930:     #  will take care of new and changed hosts as connections come into being.
                    931: 
                    932: 
                    933:     KillHostHashes;
                    934:     ReadHostTable;
                    935: 
                    936:     foreach my $child (keys %children) {
                    937: 	my $childip = $children{$child};
                    938: 	if(!$hostid{$childip}) {
1.149     foxr      939: 	    logthis('<font color="blue"> UpdateHosts killing child '
                    940: 		    ." $child for ip $childip </font>");
1.148     foxr      941: 	    kill('INT', $child);
1.149     foxr      942: 	} else {
                    943: 	    logthis('<font color="green"> keeping child for ip '
                    944: 		    ." $childip (pid=$child) </font>");
1.148     foxr      945: 	}
                    946:     }
                    947:     ReloadApache;
1.165     albertel  948:     &status("Finished reloading hosts.tab");
1.144     foxr      949: }
                    950: 
1.148     foxr      951: 
1.57      www       952: sub checkchildren {
1.165     albertel  953:     &status("Checking on the children (sending signals)");
1.57      www       954:     &initnewstatus();
                    955:     &logstatus();
                    956:     &logthis('Going to check on the children');
1.134     albertel  957:     my $docdir=$perlvar{'lonDocRoot'};
1.61      harris41  958:     foreach (sort keys %children) {
1.57      www       959: 	sleep 1;
                    960:         unless (kill 'USR1' => $_) {
                    961: 	    &logthis ('Child '.$_.' is dead');
                    962:             &logstatus($$.' is dead');
                    963:         } 
1.61      harris41  964:     }
1.63      www       965:     sleep 5;
1.113     albertel  966:     $SIG{ALRM} = sub { die "timeout" };
                    967:     $SIG{__DIE__} = 'DEFAULT';
1.165     albertel  968:     &status("Checking on the children (waiting for reports)");
1.63      www       969:     foreach (sort keys %children) {
                    970:         unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113     albertel  971:           eval {
                    972:             alarm(300);
1.63      www       973: 	    &logthis('Child '.$_.' did not respond');
1.67      albertel  974: 	    kill 9 => $_;
1.131     albertel  975: 	    #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
                    976: 	    #$subj="LON: $currenthostid killed lond process $_";
                    977: 	    #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
                    978: 	    #$execdir=$perlvar{'lonDaemons'};
                    979: 	    #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.113     albertel  980: 	    alarm(0);
                    981: 	  }
1.63      www       982:         }
                    983:     }
1.113     albertel  984:     $SIG{ALRM} = 'DEFAULT';
1.155     albertel  985:     $SIG{__DIE__} = \&catchexception;
1.165     albertel  986:     &status("Finished checking children");
1.57      www       987: }
                    988: 
1.1       albertel  989: # --------------------------------------------------------------------- Logging
                    990: 
                    991: sub logthis {
                    992:     my $message=shift;
                    993:     my $execdir=$perlvar{'lonDaemons'};
                    994:     my $fh=IO::File->new(">>$execdir/logs/lond.log");
                    995:     my $now=time;
                    996:     my $local=localtime($now);
1.58      www       997:     $lastlog=$local.': '.$message;
1.1       albertel  998:     print $fh "$local ($$): $message\n";
                    999: }
                   1000: 
1.77      foxr     1001: # ------------------------- Conditional log if $DEBUG true.
                   1002: sub Debug {
                   1003:     my $message = shift;
                   1004:     if($DEBUG) {
                   1005: 	&logthis($message);
                   1006:     }
                   1007: }
1.161     foxr     1008: 
                   1009: #
                   1010: #   Sub to do replies to client.. this gives a hook for some
                   1011: #   debug tracing too:
                   1012: #  Parameters:
                   1013: #     fd      - File open on client.
                   1014: #     reply   - Text to send to client.
                   1015: #     request - Original request from client.
                   1016: #
                   1017: sub Reply {
                   1018:     my $fd      = shift;
                   1019:     my $reply   = shift;
                   1020:     my $request = shift;
                   1021: 
                   1022:     print $fd $reply;
                   1023:     Debug("Request was $request  Reply was $reply");
                   1024: 
                   1025: }
1.57      www      1026: # ------------------------------------------------------------------ Log status
                   1027: 
                   1028: sub logstatus {
1.178   ! foxr     1029:     &status("Doing logging");
        !          1030:     my $docdir=$perlvar{'lonDocRoot'};
        !          1031:     {
        !          1032:     my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
        !          1033:     print $fh $$."\t".$clientname."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
        !          1034:     $fh->close();
        !          1035:     }
        !          1036:     &status("Finished londstatus.txt");
        !          1037:     {
        !          1038: 	my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
        !          1039:         print $fh $status."\n".$lastlog."\n".time;
        !          1040:         $fh->close();
        !          1041:     }
        !          1042:     &status("Finished logging");
1.57      www      1043: }
                   1044: 
                   1045: sub initnewstatus {
                   1046:     my $docdir=$perlvar{'lonDocRoot'};
                   1047:     my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
                   1048:     my $now=time;
                   1049:     my $local=localtime($now);
                   1050:     print $fh "LOND status $local - parent $$\n\n";
1.64      www      1051:     opendir(DIR,"$docdir/lon-status/londchld");
1.134     albertel 1052:     while (my $filename=readdir(DIR)) {
1.64      www      1053:         unlink("$docdir/lon-status/londchld/$filename");
                   1054:     }
                   1055:     closedir(DIR);
1.57      www      1056: }
                   1057: 
                   1058: # -------------------------------------------------------------- Status setting
                   1059: 
                   1060: sub status {
                   1061:     my $what=shift;
                   1062:     my $now=time;
                   1063:     my $local=localtime($now);
1.178   ! foxr     1064:     $status=$local.': '.$what;
        !          1065:     $0='lond: '.$what.' '.$local;
1.57      www      1066: }
1.11      www      1067: 
                   1068: # -------------------------------------------------------- Escape Special Chars
                   1069: 
                   1070: sub escape {
                   1071:     my $str=shift;
                   1072:     $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
                   1073:     return $str;
                   1074: }
                   1075: 
                   1076: # ----------------------------------------------------- Un-Escape Special Chars
                   1077: 
                   1078: sub unescape {
                   1079:     my $str=shift;
                   1080:     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
                   1081:     return $str;
                   1082: }
                   1083: 
1.1       albertel 1084: # ----------------------------------------------------------- Send USR1 to lonc
                   1085: 
                   1086: sub reconlonc {
                   1087:     my $peerfile=shift;
                   1088:     &logthis("Trying to reconnect for $peerfile");
                   1089:     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
                   1090:     if (my $fh=IO::File->new("$loncfile")) {
                   1091: 	my $loncpid=<$fh>;
                   1092:         chomp($loncpid);
                   1093:         if (kill 0 => $loncpid) {
                   1094: 	    &logthis("lonc at pid $loncpid responding, sending USR1");
                   1095:             kill USR1 => $loncpid;
                   1096:         } else {
1.9       www      1097: 	    &logthis(
                   1098:               "<font color=red>CRITICAL: "
                   1099:              ."lonc at pid $loncpid not responding, giving up</font>");
1.1       albertel 1100:         }
                   1101:     } else {
1.9       www      1102:       &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1       albertel 1103:     }
                   1104: }
                   1105: 
                   1106: # -------------------------------------------------- Non-critical communication
1.11      www      1107: 
1.1       albertel 1108: sub subreply {
                   1109:     my ($cmd,$server)=@_;
                   1110:     my $peerfile="$perlvar{'lonSockDir'}/$server";
                   1111:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                   1112:                                       Type    => SOCK_STREAM,
                   1113:                                       Timeout => 10)
                   1114:        or return "con_lost";
                   1115:     print $sclient "$cmd\n";
                   1116:     my $answer=<$sclient>;
                   1117:     chomp($answer);
                   1118:     if (!$answer) { $answer="con_lost"; }
                   1119:     return $answer;
                   1120: }
                   1121: 
                   1122: sub reply {
                   1123:   my ($cmd,$server)=@_;
                   1124:   my $answer;
1.115     albertel 1125:   if ($server ne $currenthostid) { 
1.1       albertel 1126:     $answer=subreply($cmd,$server);
                   1127:     if ($answer eq 'con_lost') {
                   1128: 	$answer=subreply("ping",$server);
                   1129:         if ($answer ne $server) {
1.115     albertel 1130: 	    &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1       albertel 1131:            &reconlonc("$perlvar{'lonSockDir'}/$server");
                   1132:         }
                   1133:         $answer=subreply($cmd,$server);
                   1134:     }
                   1135:   } else {
                   1136:     $answer='self_reply';
                   1137:   } 
                   1138:   return $answer;
                   1139: }
                   1140: 
1.13      www      1141: # -------------------------------------------------------------- Talk to lonsql
                   1142: 
1.12      harris41 1143: sub sqlreply {
                   1144:     my ($cmd)=@_;
                   1145:     my $answer=subsqlreply($cmd);
                   1146:     if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
                   1147:     return $answer;
                   1148: }
                   1149: 
                   1150: sub subsqlreply {
                   1151:     my ($cmd)=@_;
                   1152:     my $unixsock="mysqlsock";
                   1153:     my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
                   1154:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                   1155:                                       Type    => SOCK_STREAM,
                   1156:                                       Timeout => 10)
                   1157:        or return "con_lost";
                   1158:     print $sclient "$cmd\n";
                   1159:     my $answer=<$sclient>;
                   1160:     chomp($answer);
                   1161:     if (!$answer) { $answer="con_lost"; }
                   1162:     return $answer;
                   1163: }
                   1164: 
1.1       albertel 1165: # -------------------------------------------- Return path to profile directory
1.11      www      1166: 
1.1       albertel 1167: sub propath {
                   1168:     my ($udom,$uname)=@_;
                   1169:     $udom=~s/\W//g;
                   1170:     $uname=~s/\W//g;
1.16      www      1171:     my $subdir=$uname.'__';
1.1       albertel 1172:     $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
                   1173:     my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
                   1174:     return $proname;
                   1175: } 
                   1176: 
                   1177: # --------------------------------------- Is this the home server of an author?
1.11      www      1178: 
1.1       albertel 1179: sub ishome {
                   1180:     my $author=shift;
                   1181:     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
                   1182:     my ($udom,$uname)=split(/\//,$author);
                   1183:     my $proname=propath($udom,$uname);
                   1184:     if (-e $proname) {
                   1185: 	return 'owner';
                   1186:     } else {
                   1187:         return 'not_owner';
                   1188:     }
                   1189: }
                   1190: 
                   1191: # ======================================================= Continue main program
                   1192: # ---------------------------------------------------- Fork once and dissociate
                   1193: 
1.134     albertel 1194: my $fpid=fork;
1.1       albertel 1195: exit if $fpid;
1.29      harris41 1196: die "Couldn't fork: $!" unless defined ($fpid);
1.1       albertel 1197: 
1.29      harris41 1198: POSIX::setsid() or die "Can't start new session: $!";
1.1       albertel 1199: 
                   1200: # ------------------------------------------------------- Write our PID on disk
                   1201: 
1.134     albertel 1202: my $execdir=$perlvar{'lonDaemons'};
1.1       albertel 1203: open (PIDSAVE,">$execdir/logs/lond.pid");
                   1204: print PIDSAVE "$$\n";
                   1205: close(PIDSAVE);
1.9       www      1206: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57      www      1207: &status('Starting');
1.1       albertel 1208: 
1.106     foxr     1209: 
1.1       albertel 1210: 
                   1211: # ----------------------------------------------------- Install signal handlers
                   1212: 
1.57      www      1213: 
1.1       albertel 1214: $SIG{CHLD} = \&REAPER;
                   1215: $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                   1216: $SIG{HUP}  = \&HUPSMAN;
1.57      www      1217: $SIG{USR1} = \&checkchildren;
1.144     foxr     1218: $SIG{USR2} = \&UpdateHosts;
1.106     foxr     1219: 
1.148     foxr     1220: #  Read the host hashes:
                   1221: 
                   1222: ReadHostTable;
1.106     foxr     1223: 
                   1224: # --------------------------------------------------------------
                   1225: #   Accept connections.  When a connection comes in, it is validated
                   1226: #   and if good, a child process is created to process transactions
                   1227: #   along the connection.
                   1228: 
1.1       albertel 1229: while (1) {
1.165     albertel 1230:     &status('Starting accept');
1.106     foxr     1231:     $client = $server->accept() or next;
1.165     albertel 1232:     &status('Accepted '.$client.' off to spawn');
1.106     foxr     1233:     make_new_child($client);
1.165     albertel 1234:     &status('Finished spawning');
1.1       albertel 1235: }
                   1236: 
                   1237: sub make_new_child {
                   1238:     my $pid;
1.178   ! foxr     1239:     my $cipher;
1.1       albertel 1240:     my $sigset;
1.106     foxr     1241: 
                   1242:     $client = shift;
1.165     albertel 1243:     &status('Starting new child '.$client);
1.161     foxr     1244:     &logthis('<font color="green"> Attempting to start child ('.$client.
                   1245: 	     ")</font>");    
1.1       albertel 1246:     # block signal for fork
                   1247:     $sigset = POSIX::SigSet->new(SIGINT);
                   1248:     sigprocmask(SIG_BLOCK, $sigset)
1.29      harris41 1249:         or die "Can't block SIGINT for fork: $!\n";
1.134     albertel 1250: 
1.29      harris41 1251:     die "fork: $!" unless defined ($pid = fork);
1.148     foxr     1252: 
                   1253:     $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
                   1254: 	                               # connection liveness.
                   1255: 
                   1256:     #
                   1257:     #  Figure out who we're talking to so we can record the peer in 
                   1258:     #  the pid hash.
                   1259:     #
                   1260:     my $caller = getpeername($client);
                   1261:     my ($port,$iaddr)=unpack_sockaddr_in($caller);
                   1262:     $clientip=inet_ntoa($iaddr);
1.1       albertel 1263:     
                   1264:     if ($pid) {
                   1265:         # Parent records the child's birth and returns.
                   1266:         sigprocmask(SIG_UNBLOCK, $sigset)
1.29      harris41 1267:             or die "Can't unblock SIGINT for fork: $!\n";
1.148     foxr     1268:         $children{$pid} = $clientip;
1.57      www      1269:         &status('Started child '.$pid);
1.1       albertel 1270:         return;
                   1271:     } else {
                   1272:         # Child can *not* return from this subroutine.
                   1273:         $SIG{INT} = 'DEFAULT';      # make SIGINT kill us as it did before
1.126     albertel 1274:         $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns 
                   1275:                                 #don't get intercepted
1.57      www      1276:         $SIG{USR1}= \&logstatus;
1.63      www      1277:         $SIG{ALRM}= \&timeout;
1.57      www      1278:         $lastlog='Forked ';
                   1279:         $status='Forked';
                   1280: 
1.1       albertel 1281:         # unblock signals
                   1282:         sigprocmask(SIG_UNBLOCK, $sigset)
1.29      harris41 1283:             or die "Can't unblock SIGINT for fork: $!\n";
1.13      www      1284: 
1.178   ! foxr     1285:         my $tmpsnum=0;
        !          1286: #---------------------------------------------------- kerberos 5 initialization
1.91      albertel 1287:         &Authen::Krb5::init_context();
                   1288:         &Authen::Krb5::init_ets();
                   1289: 
1.161     foxr     1290: 	&status('Accepted connection');
1.1       albertel 1291: # =============================================================================
                   1292:             # do something with the connection
                   1293: # -----------------------------------------------------------------------------
1.148     foxr     1294: 	# see if we know client and check for spoof IP by challenge
                   1295: 
1.161     foxr     1296: 	ReadManagerTable;	# May also be a manager!!
                   1297: 	
                   1298: 	my $clientrec=($hostid{$clientip}     ne undef);
                   1299: 	my $ismanager=($managers{$clientip}    ne undef);
                   1300: 	$clientname  = "[unknonwn]";
                   1301: 	if($clientrec) {	# Establish client type.
                   1302: 	    $ConnectionType = "client";
                   1303: 	    $clientname = $hostid{$clientip};
                   1304: 	    if($ismanager) {
                   1305: 		$ConnectionType = "both";
                   1306: 	    }
                   1307: 	} else {
                   1308: 	    $ConnectionType = "manager";
                   1309: 	    $clientname = $managers{$clientip};
                   1310: 	}
                   1311: 	my $clientok;
                   1312: 	if ($clientrec || $ismanager) {
                   1313: 	    &status("Waiting for init from $clientip $clientname");
                   1314: 	    &logthis('<font color="yellow">INFO: Connection, '.
                   1315: 		     $clientip.
                   1316: 		  " ($clientname) connection type = $ConnectionType </font>" );
                   1317: 	    &status("Connecting $clientip  ($clientname))"); 
                   1318: 	    my $remotereq=<$client>;
                   1319: 	    $remotereq=~s/[^\w:]//g;
                   1320: 	    if ($remotereq =~ /^init/) {
                   1321: 		&sethost("sethost:$perlvar{'lonHostID'}");
                   1322: 		my $challenge="$$".time;
                   1323: 		print $client "$challenge\n";
                   1324: 		&status(
                   1325: 			"Waiting for challenge reply from $clientip ($clientname)"); 
                   1326: 		$remotereq=<$client>;
                   1327: 		$remotereq=~s/\W//g;
                   1328: 		if ($challenge eq $remotereq) {
                   1329: 		    $clientok=1;
                   1330: 		    print $client "ok\n";
                   1331: 		} else {
                   1332: 		    &logthis(
                   1333: 			     "<font color=blue>WARNING: $clientip did not reply challenge</font>");
                   1334: 		    &status('No challenge reply '.$clientip);
                   1335: 		}
1.2       www      1336: 	    } else {
1.161     foxr     1337: 		&logthis(
                   1338: 			 "<font color=blue>WARNING: "
                   1339: 			 ."$clientip failed to initialize: >$remotereq< </font>");
                   1340: 		&status('No init '.$clientip);
                   1341: 	    }
                   1342: 	} else {
                   1343: 	    &logthis(
                   1344: 		     "<font color=blue>WARNING: Unknown client $clientip</font>");
                   1345: 	    &status('Hung up on '.$clientip);
                   1346: 	}
                   1347: 	if ($clientok) {
1.1       albertel 1348: # ---------------- New known client connecting, could mean machine online again
1.161     foxr     1349: 	    
                   1350: 	    foreach my $id (keys(%hostip)) {
                   1351: 		if ($hostip{$id} ne $clientip ||
                   1352: 		    $hostip{$currenthostid} eq $clientip) {
                   1353: 		    # no need to try to do recon's to myself
                   1354: 		    next;
1.115     albertel 1355: 		}
1.161     foxr     1356: 		&reconlonc("$perlvar{'lonSockDir'}/$id");
                   1357: 	    }
                   1358: 	    &logthis("<font color=green>Established connection: $clientname</font>");
                   1359: 	    &status('Will listen to '.$clientname);
1.178   ! foxr     1360: # ------------------------------------------------------------ Process requests
        !          1361: 	    while (my $userinput=<$client>) {
        !          1362:                 chomp($userinput);
        !          1363: 		Debug("Request = $userinput\n");
        !          1364:                 &status('Processing '.$clientname.': '.$userinput);
        !          1365:                 my $wasenc=0;
        !          1366:                 alarm(120);
        !          1367: # ------------------------------------------------------------ See if encrypted
        !          1368: 		if ($userinput =~ /^enc/) {
        !          1369: 		    if ($cipher) {
        !          1370: 			my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
        !          1371: 			$userinput='';
        !          1372: 			for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
        !          1373: 			    $userinput.=
        !          1374: 				$cipher->decrypt(
        !          1375: 						 pack("H16",substr($encinput,$encidx,16))
        !          1376: 						 );
        !          1377: 			}
        !          1378: 			$userinput=substr($userinput,0,$cmdlength);
        !          1379: 			$wasenc=1;
        !          1380: 		    }
        !          1381: 		}
        !          1382: 		
        !          1383: # ------------------------------------------------------------- Normal commands
        !          1384: # ------------------------------------------------------------------------ ping
        !          1385: 		if ($userinput =~ /^ping/) {	# client only
        !          1386: 		    if(isClient) {
        !          1387: 			print $client "$currenthostid\n";
        !          1388: 		    } else {
        !          1389: 			Reply($client, "refused\n", $userinput);
        !          1390: 		    }
        !          1391: # ------------------------------------------------------------------------ pong
        !          1392: 		}elsif ($userinput =~ /^pong/) { # client only
        !          1393: 		    if(isClient) {
        !          1394: 			my $reply=&reply("ping",$clientname);
        !          1395: 			print $client "$currenthostid:$reply\n"; 
        !          1396: 		    } else {
        !          1397: 			Reply($client, "refused\n", $userinput);
        !          1398: 		    }
        !          1399: # ------------------------------------------------------------------------ ekey
        !          1400: 		} elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
        !          1401: 		    my $buildkey=time.$$.int(rand 100000);
        !          1402: 		    $buildkey=~tr/1-6/A-F/;
        !          1403: 		    $buildkey=int(rand 100000).$buildkey.int(rand 100000);
        !          1404: 		    my $key=$currenthostid.$clientname;
        !          1405: 		    $key=~tr/a-z/A-Z/;
        !          1406: 		    $key=~tr/G-P/0-9/;
        !          1407: 		    $key=~tr/Q-Z/0-9/;
        !          1408: 		    $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
        !          1409: 		    $key=substr($key,0,32);
        !          1410: 		    my $cipherkey=pack("H32",$key);
        !          1411: 		    $cipher=new IDEA $cipherkey;
        !          1412: 		    print $client "$buildkey\n"; 
        !          1413: # ------------------------------------------------------------------------ load
        !          1414: 		} elsif ($userinput =~ /^load/) { # client only
        !          1415: 		    if (isClient) {
        !          1416: 			my $loadavg;
        !          1417: 			{
        !          1418: 			    my $loadfile=IO::File->new('/proc/loadavg');
        !          1419: 			    $loadavg=<$loadfile>;
        !          1420: 			}
        !          1421: 			$loadavg =~ s/\s.*//g;
        !          1422: 			my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
        !          1423: 			print $client "$loadpercent\n";
        !          1424: 		    } else {
        !          1425: 			Reply($client, "refused\n", $userinput);
        !          1426: 	       
        !          1427: 		    }
        !          1428: # -------------------------------------------------------------------- userload
        !          1429: 		} elsif ($userinput =~ /^userload/) { # client only
        !          1430: 		    if(isClient) {
        !          1431: 			my $userloadpercent=&userload();
        !          1432: 			print $client "$userloadpercent\n";
        !          1433: 		    } else {
        !          1434: 			Reply($client, "refused\n", $userinput);
        !          1435: 		     
        !          1436: 		    }
        !          1437: #
        !          1438: #        Transactions requiring encryption:
        !          1439: #
        !          1440: # ----------------------------------------------------------------- currentauth
        !          1441: 		} elsif ($userinput =~ /^currentauth/) {
        !          1442: 		    if (($wasenc==1)  && isClient) { # Encoded & client only.
        !          1443: 			my ($cmd,$udom,$uname)=split(/:/,$userinput);
        !          1444: 			my $result = GetAuthType($udom, $uname);
        !          1445: 			if($result eq "nouser") {
        !          1446: 			    print $client "unknown_user\n";
        !          1447: 			}
        !          1448: 			else {
        !          1449: 			    print $client "$result\n"
        !          1450: 			    }
        !          1451: 		    } else {
        !          1452: 			Reply($client, "refused\n", $userinput);
        !          1453: 			
        !          1454: 		    }
        !          1455: #--------------------------------------------------------------------- pushfile
        !          1456: 		} elsif($userinput =~ /^pushfile/) {	# encoded & manager.
        !          1457: 		    if(($wasenc == 1) && isManager) {
        !          1458: 			my $cert = GetCertificate($userinput);
        !          1459: 			if(ValidManager($cert)) {
        !          1460: 			    my $reply = PushFile($userinput);
        !          1461: 			    print $client "$reply\n";
        !          1462: 			} else {
        !          1463: 			    print $client "refused\n";
        !          1464: 			} 
        !          1465: 		    } else {
        !          1466: 			Reply($client, "refused\n", $userinput);
        !          1467: 			
        !          1468: 		    }
        !          1469: #--------------------------------------------------------------------- reinit
        !          1470: 		} elsif($userinput =~ /^reinit/) { # Encoded and manager
        !          1471: 			if (($wasenc == 1) && isManager) {
        !          1472: 				my $cert = GetCertificate($userinput);
        !          1473: 				if(ValidManager($cert)) {
        !          1474: 					chomp($userinput);
        !          1475: 					my $reply = ReinitProcess($userinput);
        !          1476: 					print $client  "$reply\n";
        !          1477: 				} else {
        !          1478: 					 print $client "refused\n";
        !          1479: 				}
        !          1480: 			} else {
        !          1481: 				Reply($client, "refused\n", $userinput);
        !          1482: 			}
        !          1483: #------------------------------------------------------------------------- edit
        !          1484: 		    } elsif ($userinput =~ /^edit/) {    # encoded and manager:
        !          1485: 			if(($wasenc ==1) && (isManager)) {
        !          1486: 			    my $cert = GetCertificate($userinput);
        !          1487: 			    if(ValidManager($cert)) {
        !          1488:                my($command, $filetype, $script) = split(/:/, $userinput);
        !          1489:                if (($filetype eq "hosts") || ($filetype eq "domain")) {
        !          1490:                   if($script ne "") {
        !          1491: 		      Reply($client, EditFile($userinput));
        !          1492:                   } else {
        !          1493:                      Reply($client,"refused\n",$userinput);
        !          1494:                   }
        !          1495:                } else {
        !          1496:                   Reply($client,"refused\n",$userinput);
        !          1497:                }
        !          1498:             } else {
        !          1499:                Reply($client,"refused\n",$userinput);
        !          1500:             }
        !          1501:          } else {
        !          1502: 	     Reply($client,"refused\n",$userinput);
        !          1503: 	 }
        !          1504: # ------------------------------------------------------------------------ auth
        !          1505: 		    } elsif ($userinput =~ /^auth/) { # Encoded and client only.
        !          1506: 		    if (($wasenc==1) && isClient) {
        !          1507: 			my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
        !          1508: 			chomp($upass);
        !          1509: 			$upass=unescape($upass);
        !          1510: 			my $proname=propath($udom,$uname);
        !          1511: 			my $passfilename="$proname/passwd";
        !          1512: 			if (-e $passfilename) {
        !          1513: 			    my $pf = IO::File->new($passfilename);
        !          1514: 			    my $realpasswd=<$pf>;
        !          1515: 			    chomp($realpasswd);
        !          1516: 			    my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
        !          1517: 			    my $pwdcorrect=0;
        !          1518: 			    if ($howpwd eq 'internal') {
        !          1519: 				&Debug("Internal auth");
        !          1520: 				$pwdcorrect=
        !          1521: 				    (crypt($upass,$contentpwd) eq $contentpwd);
        !          1522: 			    } elsif ($howpwd eq 'unix') {
        !          1523: 				&Debug("Unix auth");
        !          1524: 				if((getpwnam($uname))[1] eq "") { #no such user!
        !          1525: 				    $pwdcorrect = 0;
        !          1526: 				} else {
        !          1527: 				    $contentpwd=(getpwnam($uname))[1];
        !          1528: 				    my $pwauth_path="/usr/local/sbin/pwauth";
        !          1529: 				    unless ($contentpwd eq 'x') {
        !          1530: 					$pwdcorrect=
        !          1531: 					    (crypt($upass,$contentpwd) eq 
        !          1532: 					     $contentpwd);
        !          1533: 				    }
        !          1534: 				    
        !          1535: 				    elsif (-e $pwauth_path) {
        !          1536: 					open PWAUTH, "|$pwauth_path" or
        !          1537: 					    die "Cannot invoke authentication";
        !          1538: 					print PWAUTH "$uname\n$upass\n";
        !          1539: 					close PWAUTH;
        !          1540: 					$pwdcorrect=!$?;
        !          1541: 				    }
        !          1542: 				}
        !          1543: 			    } elsif ($howpwd eq 'krb4') {
        !          1544: 				my $null=pack("C",0);
        !          1545: 				unless ($upass=~/$null/) {
        !          1546: 				    my $krb4_error = &Authen::Krb4::get_pw_in_tkt
        !          1547: 					($uname,"",$contentpwd,'krbtgt',
        !          1548: 					 $contentpwd,1,$upass);
        !          1549: 				    if (!$krb4_error) {
        !          1550: 					$pwdcorrect = 1;
        !          1551: 				    } else { 
        !          1552: 					$pwdcorrect=0; 
        !          1553: 					# log error if it is not a bad password
        !          1554: 					if ($krb4_error != 62) {
        !          1555: 					    &logthis('krb4:'.$uname.','.$contentpwd.','.
        !          1556: 						     &Authen::Krb4::get_err_txt($Authen::Krb4::error));
        !          1557: 					}
        !          1558: 				    }
        !          1559: 				}
        !          1560: 			    } elsif ($howpwd eq 'krb5') {
        !          1561: 				my $null=pack("C",0);
        !          1562: 				unless ($upass=~/$null/) {
        !          1563: 				    my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
        !          1564: 				    my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
        !          1565: 				    my $krbserver=&Authen::Krb5::parse_name($krbservice);
        !          1566: 				    my $credentials=&Authen::Krb5::cc_default();
        !          1567: 				    $credentials->initialize($krbclient);
        !          1568: 				    my $krbreturn = 
        !          1569: 					&Authen::Krb5::get_in_tkt_with_password(
        !          1570: 										$krbclient,$krbserver,$upass,$credentials);
        !          1571: #				  unless ($krbreturn) {
        !          1572: #				      &logthis("Krb5 Error: ".
        !          1573: #					       &Authen::Krb5::error());
        !          1574: #				  }
        !          1575: 				    $pwdcorrect = ($krbreturn == 1);
        !          1576: 				} else { $pwdcorrect=0; }
        !          1577: 			    } elsif ($howpwd eq 'localauth') {
        !          1578: 				$pwdcorrect=&localauth::localauth($uname,$upass,
        !          1579: 								  $contentpwd);
        !          1580: 			    }
        !          1581: 			    if ($pwdcorrect) {
        !          1582: 				print $client "authorized\n";
        !          1583: 			    } else {
        !          1584: 				print $client "non_authorized\n";
        !          1585: 			    }  
        !          1586: 			} else {
        !          1587: 			    print $client "unknown_user\n";
        !          1588: 			}
        !          1589: 		    } else {
        !          1590: 			Reply($client, "refused\n", $userinput);
        !          1591: 		       
        !          1592: 		    }
        !          1593: # ---------------------------------------------------------------------- passwd
        !          1594: 		} elsif ($userinput =~ /^passwd/) { # encoded and client
        !          1595: 		    if (($wasenc==1) && isClient) {
        !          1596: 			my 
        !          1597: 			    ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
        !          1598: 			chomp($npass);
        !          1599: 			$upass=&unescape($upass);
        !          1600: 			$npass=&unescape($npass);
        !          1601: 			&Debug("Trying to change password for $uname");
        !          1602: 			my $proname=propath($udom,$uname);
        !          1603: 			my $passfilename="$proname/passwd";
        !          1604: 			if (-e $passfilename) {
        !          1605: 			    my $realpasswd;
        !          1606: 			    { my $pf = IO::File->new($passfilename);
        !          1607: 			      $realpasswd=<$pf>; }
        !          1608: 			    chomp($realpasswd);
        !          1609: 			    my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
        !          1610: 			    if ($howpwd eq 'internal') {
        !          1611: 				&Debug("internal auth");
        !          1612: 				if (crypt($upass,$contentpwd) eq $contentpwd) {
        !          1613: 				    my $salt=time;
        !          1614: 				    $salt=substr($salt,6,2);
        !          1615: 				    my $ncpass=crypt($npass,$salt);
        !          1616: 				    {
        !          1617: 					my $pf;
        !          1618: 					if ($pf = IO::File->new(">$passfilename")) {
        !          1619: 					    print $pf "internal:$ncpass\n";
        !          1620: 					    &logthis("Result of password change for $uname: pwchange_success");
        !          1621: 					    print $client "ok\n";
        !          1622: 					} else {
        !          1623: 					    &logthis("Unable to open $uname passwd to change password");
        !          1624: 					    print $client "non_authorized\n";
        !          1625: 					}
        !          1626: 				    }             
        !          1627: 				    
        !          1628: 				} else {
        !          1629: 				    print $client "non_authorized\n";
        !          1630: 				}
        !          1631: 			    } elsif ($howpwd eq 'unix') {
        !          1632: 				# Unix means we have to access /etc/password
        !          1633: 				# one way or another.
        !          1634: 				# First: Make sure the current password is
        !          1635: 				#        correct
        !          1636: 				&Debug("auth is unix");
        !          1637: 				$contentpwd=(getpwnam($uname))[1];
        !          1638: 				my $pwdcorrect = "0";
        !          1639: 				my $pwauth_path="/usr/local/sbin/pwauth";
        !          1640: 				unless ($contentpwd eq 'x') {
        !          1641: 				    $pwdcorrect=
        !          1642: 					(crypt($upass,$contentpwd) eq $contentpwd);
        !          1643: 				} elsif (-e $pwauth_path) {
        !          1644: 				    open PWAUTH, "|$pwauth_path" or
        !          1645: 					die "Cannot invoke authentication";
        !          1646: 				    print PWAUTH "$uname\n$upass\n";
        !          1647: 				    close PWAUTH;
        !          1648: 				    &Debug("exited pwauth with $? ($uname,$upass) ");
        !          1649: 				    $pwdcorrect=($? == 0);
        !          1650: 				}
        !          1651: 				if ($pwdcorrect) {
        !          1652: 				    my $execdir=$perlvar{'lonDaemons'};
        !          1653: 				    &Debug("Opening lcpasswd pipeline");
        !          1654: 				    my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
        !          1655: 				    print $pf "$uname\n$npass\n$npass\n";
        !          1656: 				    close $pf;
        !          1657: 				    my $err = $?;
        !          1658: 				    my $result = ($err>0 ? 'pwchange_failure' 
        !          1659: 						  : 'ok');
        !          1660: 				    &logthis("Result of password change for $uname: ".
        !          1661: 					     &lcpasswdstrerror($?));
        !          1662: 				    print $client "$result\n";
        !          1663: 				} else {
        !          1664: 				    print $client "non_authorized\n";
        !          1665: 				}
        !          1666: 			    } else {
        !          1667: 				print $client "auth_mode_error\n";
        !          1668: 			    }  
        !          1669: 			} else {
        !          1670: 			    print $client "unknown_user\n";
        !          1671: 			}
        !          1672: 		    } else {
        !          1673: 			Reply($client, "refused\n", $userinput);
        !          1674: 		       
        !          1675: 		    }
        !          1676: # -------------------------------------------------------------------- makeuser
        !          1677: 		} elsif ($userinput =~ /^makeuser/) { # encoded and client.
        !          1678: 		    &Debug("Make user received");
        !          1679: 		    my $oldumask=umask(0077);
        !          1680: 		    if (($wasenc==1) && isClient) {
        !          1681: 			my 
        !          1682: 			    ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
        !          1683: 			&Debug("cmd =".$cmd." $udom =".$udom.
        !          1684: 			       " uname=".$uname);
        !          1685: 			chomp($npass);
        !          1686: 			$npass=&unescape($npass);
        !          1687: 			my $proname=propath($udom,$uname);
        !          1688: 			my $passfilename="$proname/passwd";
        !          1689: 			&Debug("Password file created will be:".
        !          1690: 			       $passfilename);
        !          1691: 			if (-e $passfilename) {
        !          1692: 			    print $client "already_exists\n";
        !          1693: 			} elsif ($udom ne $currentdomainid) {
        !          1694: 			    print $client "not_right_domain\n";
        !          1695: 			} else {
        !          1696: 			    my @fpparts=split(/\//,$proname);
        !          1697: 			    my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
        !          1698: 			    my $fperror='';
        !          1699: 			    for (my $i=3;$i<=$#fpparts;$i++) {
        !          1700: 				$fpnow.='/'.$fpparts[$i]; 
        !          1701: 				unless (-e $fpnow) {
        !          1702: 				    unless (mkdir($fpnow,0777)) {
        !          1703: 					$fperror="error: ".($!+0)
        !          1704: 					    ." mkdir failed while attempting "
        !          1705: 					    ."makeuser";
        !          1706: 				    }
        !          1707: 				}
        !          1708: 			    }
        !          1709: 			    unless ($fperror) {
        !          1710: 				my $result=&make_passwd_file($uname, $umode,$npass,
        !          1711: 							     $passfilename);
        !          1712: 				print $client $result;
        !          1713: 			    } else {
        !          1714: 				print $client "$fperror\n";
        !          1715: 			    }
        !          1716: 			}
        !          1717: 		    } else {
        !          1718: 			Reply($client, "refused\n", $userinput);
        !          1719: 	      
        !          1720: 		    }
        !          1721: 		    umask($oldumask);
        !          1722: # -------------------------------------------------------------- changeuserauth
        !          1723: 		} elsif ($userinput =~ /^changeuserauth/) { # encoded & client
        !          1724: 		    &Debug("Changing authorization");
        !          1725: 		    if (($wasenc==1) && isClient) {
        !          1726: 			my 
        !          1727: 			    ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
        !          1728: 			chomp($npass);
        !          1729: 			&Debug("cmd = ".$cmd." domain= ".$udom.
        !          1730: 			       "uname =".$uname." umode= ".$umode);
        !          1731: 			$npass=&unescape($npass);
        !          1732: 			my $proname=&propath($udom,$uname);
        !          1733: 			my $passfilename="$proname/passwd";
        !          1734: 			if ($udom ne $currentdomainid) {
        !          1735: 			    print $client "not_right_domain\n";
        !          1736: 			} else {
        !          1737: 			    my $result=&make_passwd_file($uname, $umode,$npass,
        !          1738: 							 $passfilename);
        !          1739: 			    print $client $result;
        !          1740: 			}
        !          1741: 		    } else {
        !          1742: 			Reply($client, "refused\n", $userinput);
        !          1743: 		   
        !          1744: 		    }
        !          1745: # ------------------------------------------------------------------------ home
        !          1746: 		} elsif ($userinput =~ /^home/) { # client clear or encoded
        !          1747: 		    if(isClient) {
        !          1748: 			my ($cmd,$udom,$uname)=split(/:/,$userinput);
        !          1749: 			chomp($uname);
        !          1750: 			my $proname=propath($udom,$uname);
        !          1751: 			if (-e $proname) {
        !          1752: 			    print $client "found\n";
        !          1753: 			} else {
        !          1754: 			    print $client "not_found\n";
        !          1755: 			}
        !          1756: 		    } else {
        !          1757: 			Reply($client, "refused\n", $userinput);
        !          1758: 
        !          1759: 		    }
        !          1760: # ---------------------------------------------------------------------- update
        !          1761: 		} elsif ($userinput =~ /^update/) { # client clear or encoded.
        !          1762: 		    if(isClient) {
        !          1763: 			my ($cmd,$fname)=split(/:/,$userinput);
        !          1764: 			my $ownership=ishome($fname);
        !          1765: 			if ($ownership eq 'not_owner') {
        !          1766: 			    if (-e $fname) {
        !          1767: 				my ($dev,$ino,$mode,$nlink,
        !          1768: 				    $uid,$gid,$rdev,$size,
        !          1769: 				    $atime,$mtime,$ctime,
        !          1770: 				    $blksize,$blocks)=stat($fname);
        !          1771: 				my $now=time;
        !          1772: 				my $since=$now-$atime;
        !          1773: 				if ($since>$perlvar{'lonExpire'}) {
        !          1774: 				    my $reply=
        !          1775: 					&reply("unsub:$fname","$clientname");
        !          1776: 				    unlink("$fname");
        !          1777: 				} else {
        !          1778: 				    my $transname="$fname.in.transfer";
        !          1779: 				    my $remoteurl=
        !          1780: 					&reply("sub:$fname","$clientname");
        !          1781: 				    my $response;
        !          1782: 				    {
        !          1783: 					my $ua=new LWP::UserAgent;
        !          1784: 					my $request=new HTTP::Request('GET',"$remoteurl");
        !          1785: 					$response=$ua->request($request,$transname);
        !          1786: 				    }
        !          1787: 				    if ($response->is_error()) {
        !          1788: 					unlink($transname);
        !          1789: 					my $message=$response->status_line;
        !          1790: 					&logthis(
        !          1791: 						 "LWP GET: $message for $fname ($remoteurl)");
        !          1792: 				    } else {
        !          1793: 					if ($remoteurl!~/\.meta$/) {
        !          1794: 					    my $ua=new LWP::UserAgent;
        !          1795: 					    my $mrequest=
        !          1796: 						new HTTP::Request('GET',$remoteurl.'.meta');
        !          1797: 					    my $mresponse=
        !          1798: 						$ua->request($mrequest,$fname.'.meta');
        !          1799: 					    if ($mresponse->is_error()) {
        !          1800: 						unlink($fname.'.meta');
        !          1801: 					    }
        !          1802: 					}
        !          1803: 					rename($transname,$fname);
        !          1804: 				    }
        !          1805: 				}
        !          1806: 				print $client "ok\n";
        !          1807: 			    } else {
        !          1808: 				print $client "not_found\n";
        !          1809: 			    }
        !          1810: 			} else {
        !          1811: 			    print $client "rejected\n";
        !          1812: 			}
        !          1813: 		    } else {
        !          1814: 			Reply($client, "refused\n", $userinput);
        !          1815: 
        !          1816: 		    }
        !          1817: # -------------------------------------- fetch a user file from a remote server
        !          1818: 		} elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
        !          1819: 		    if(isClient) {
        !          1820: 			my ($cmd,$fname)=split(/:/,$userinput);
        !          1821: 			my ($udom,$uname,$ufile)=split(/\//,$fname);
        !          1822: 			my $udir=propath($udom,$uname).'/userfiles';
        !          1823: 			unless (-e $udir) { mkdir($udir,0770); }
        !          1824: 			if (-e $udir) {
        !          1825: 			    $ufile=~s/^[\.\~]+//;
        !          1826: 			    $ufile=~s/\///g;
        !          1827: 			    my $destname=$udir.'/'.$ufile;
        !          1828: 			    my $transname=$udir.'/'.$ufile.'.in.transit';
        !          1829: 			    my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
        !          1830: 			    my $response;
        !          1831: 			    {
        !          1832: 				my $ua=new LWP::UserAgent;
        !          1833: 				my $request=new HTTP::Request('GET',"$remoteurl");
        !          1834: 				$response=$ua->request($request,$transname);
        !          1835: 			    }
        !          1836: 			    if ($response->is_error()) {
        !          1837: 				unlink($transname);
        !          1838: 				my $message=$response->status_line;
        !          1839: 				&logthis("LWP GET: $message for $fname ($remoteurl)");
        !          1840: 				print $client "failed\n";
        !          1841: 			    } else {
        !          1842: 				if (!rename($transname,$destname)) {
        !          1843: 				    &logthis("Unable to move $transname to $destname");
        !          1844: 				    unlink($transname);
        !          1845: 				    print $client "failed\n";
        !          1846: 				} else {
        !          1847: 				    print $client "ok\n";
        !          1848: 				}
        !          1849: 			    }
        !          1850: 			} else {
        !          1851: 			    print $client "not_home\n";
        !          1852: 			}
        !          1853: 		    } else {
        !          1854: 			Reply($client, "refused\n", $userinput);
        !          1855: 
        !          1856: 		    }
        !          1857: # ------------------------------------------ authenticate access to a user file
        !          1858: 		} elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
        !          1859: 		    if(isClient) {
        !          1860: 			my ($cmd,$fname,$session)=split(/:/,$userinput);
        !          1861: 			chomp($session);
        !          1862: 			my $reply='non_auth';
        !          1863: 			if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
        !          1864: 				 $session.'.id')) {
        !          1865: 			    while (my $line=<ENVIN>) {
        !          1866: 				if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
        !          1867: 			    }
        !          1868: 			    close(ENVIN);
        !          1869: 			    print $client $reply."\n";
        !          1870: 			} else {
        !          1871: 			    print $client "invalid_token\n";
        !          1872: 			}
        !          1873: 		    } else {
        !          1874: 			Reply($client, "refused\n", $userinput);
        !          1875: 
        !          1876: 		    }
        !          1877: # ----------------------------------------------------------------- unsubscribe
        !          1878: 		} elsif ($userinput =~ /^unsub/) {
        !          1879: 		    if(isClient) {
        !          1880: 			my ($cmd,$fname)=split(/:/,$userinput);
        !          1881: 			if (-e $fname) {
        !          1882: 			    print $client &unsub($client,$fname,$clientip);
        !          1883: 			} else {
        !          1884: 			    print $client "not_found\n";
        !          1885: 			}
        !          1886: 		    } else {
        !          1887: 			Reply($client, "refused\n", $userinput);
        !          1888: 
        !          1889: 		    }
        !          1890: # ------------------------------------------------------------------- subscribe
        !          1891: 		} elsif ($userinput =~ /^sub/) {
        !          1892: 		    if(isClient) {
        !          1893: 			print $client &subscribe($userinput,$clientip);
        !          1894: 		    } else {
        !          1895: 			Reply($client, "refused\n", $userinput);
        !          1896: 
        !          1897: 		    }
        !          1898: # ------------------------------------------------------------- current version
        !          1899: 		} elsif ($userinput =~ /^currentversion/) {
        !          1900: 		    if(isClient) {
        !          1901: 			my ($cmd,$fname)=split(/:/,$userinput);
        !          1902: 			print $client &currentversion($fname)."\n";
        !          1903: 		    } else {
        !          1904: 			Reply($client, "refused\n", $userinput);
        !          1905: 
        !          1906: 		    }
        !          1907: # ------------------------------------------------------------------------- log
        !          1908: 		} elsif ($userinput =~ /^log/) {
        !          1909: 		    if(isClient) {
        !          1910: 			my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
        !          1911: 			chomp($what);
        !          1912: 			my $proname=propath($udom,$uname);
        !          1913: 			my $now=time;
        !          1914: 			{
        !          1915: 			    my $hfh;
        !          1916: 			    if ($hfh=IO::File->new(">>$proname/activity.log")) { 
        !          1917: 				print $hfh "$now:$clientname:$what\n";
        !          1918: 				print $client "ok\n"; 
        !          1919: 			    } else {
        !          1920: 				print $client "error: ".($!+0)
        !          1921: 				    ." IO::File->new Failed "
        !          1922: 				    ."while attempting log\n";
        !          1923: 			    }
        !          1924: 			}
        !          1925: 		    } else {
        !          1926: 			Reply($client, "refused\n", $userinput);
        !          1927: 
        !          1928: 		    }
        !          1929: # ------------------------------------------------------------------------- put
        !          1930: 		} elsif ($userinput =~ /^put/) {
        !          1931: 		    if(isClient) {
        !          1932: 			my ($cmd,$udom,$uname,$namespace,$what)
        !          1933: 			    =split(/:/,$userinput);
        !          1934: 			$namespace=~s/\//\_/g;
        !          1935: 			$namespace=~s/\W//g;
        !          1936: 			if ($namespace ne 'roles') {
        !          1937: 			    chomp($what);
        !          1938: 			    my $proname=propath($udom,$uname);
        !          1939: 			    my $now=time;
        !          1940: 			    unless ($namespace=~/^nohist\_/) {
        !          1941: 				my $hfh;
        !          1942: 				if (
        !          1943: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
        !          1944: 				    ) { print $hfh "P:$now:$what\n"; }
        !          1945: 			    }
        !          1946: 			    my @pairs=split(/\&/,$what);
        !          1947: 			    my %hash;
        !          1948: 			    if (tie(%hash,'GDBM_File',
        !          1949: 				    "$proname/$namespace.db",
        !          1950: 				    &GDBM_WRCREAT(),0640)) {
        !          1951: 				foreach my $pair (@pairs) {
        !          1952: 				    my ($key,$value)=split(/=/,$pair);
        !          1953: 				    $hash{$key}=$value;
        !          1954: 				}
        !          1955: 				if (untie(%hash)) {
        !          1956: 				    print $client "ok\n";
        !          1957: 				} else {
        !          1958: 				    print $client "error: ".($!+0)
        !          1959: 					." untie(GDBM) failed ".
        !          1960: 					"while attempting put\n";
        !          1961: 				}
        !          1962: 			    } else {
        !          1963: 				print $client "error: ".($!)
        !          1964: 				    ." tie(GDBM) Failed ".
        !          1965: 				    "while attempting put\n";
        !          1966: 			    }
        !          1967: 			} else {
        !          1968: 			    print $client "refused\n";
        !          1969: 			}
        !          1970: 		    } else {
        !          1971: 			Reply($client, "refused\n", $userinput);
        !          1972: 
        !          1973: 		    }
        !          1974: # ------------------------------------------------------------------- inc
        !          1975: 		} elsif ($userinput =~ /^inc:/) {
        !          1976: 		    if(isClient) {
        !          1977: 			my ($cmd,$udom,$uname,$namespace,$what)
        !          1978: 			    =split(/:/,$userinput);
        !          1979: 			$namespace=~s/\//\_/g;
        !          1980: 			$namespace=~s/\W//g;
        !          1981: 			if ($namespace ne 'roles') {
        !          1982: 			    chomp($what);
        !          1983: 			    my $proname=propath($udom,$uname);
        !          1984: 			    my $now=time;
        !          1985: 			    unless ($namespace=~/^nohist\_/) {
        !          1986: 				my $hfh;
        !          1987: 				if (
        !          1988: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
        !          1989: 				    ) { print $hfh "P:$now:$what\n"; }
        !          1990: 			    }
        !          1991: 			    my @pairs=split(/\&/,$what);
        !          1992: 			    my %hash;
        !          1993: 			    if (tie(%hash,'GDBM_File',
        !          1994: 				    "$proname/$namespace.db",
        !          1995: 				    &GDBM_WRCREAT(),0640)) {
        !          1996: 				foreach my $pair (@pairs) {
        !          1997: 				    my ($key,$value)=split(/=/,$pair);
        !          1998:                                     # We could check that we have a number...
        !          1999:                                     if (! defined($value) || $value eq '') {
        !          2000:                                         $value = 1;
        !          2001:                                     }
        !          2002: 				    $hash{$key}+=$value;
        !          2003: 				}
        !          2004: 				if (untie(%hash)) {
        !          2005: 				    print $client "ok\n";
        !          2006: 				} else {
        !          2007: 				    print $client "error: ".($!+0)
        !          2008: 					." untie(GDBM) failed ".
        !          2009: 					"while attempting put\n";
        !          2010: 				}
        !          2011: 			    } else {
        !          2012: 				print $client "error: ".($!)
        !          2013: 				    ." tie(GDBM) Failed ".
        !          2014: 				    "while attempting put\n";
        !          2015: 			    }
        !          2016: 			} else {
        !          2017: 			    print $client "refused\n";
        !          2018: 			}
        !          2019: 		    } else {
        !          2020: 			Reply($client, "refused\n", $userinput);
        !          2021: 
        !          2022: 		    }
        !          2023: # -------------------------------------------------------------------- rolesput
        !          2024: 		} elsif ($userinput =~ /^rolesput/) {
        !          2025: 		    if(isClient) {
        !          2026: 			&Debug("rolesput");
        !          2027: 			if ($wasenc==1) {
        !          2028: 			    my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
        !          2029: 				=split(/:/,$userinput);
        !          2030: 			    &Debug("cmd = ".$cmd." exedom= ".$exedom.
        !          2031: 				   "user = ".$exeuser." udom=".$udom.
        !          2032: 				   "what = ".$what);
        !          2033: 			    my $namespace='roles';
        !          2034: 			    chomp($what);
        !          2035: 			    my $proname=propath($udom,$uname);
        !          2036: 			    my $now=time;
        !          2037: 			    {
        !          2038: 				my $hfh;
        !          2039: 				if (
        !          2040: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
        !          2041: 				    ) { 
        !          2042: 				    print $hfh "P:$now:$exedom:$exeuser:$what\n";
        !          2043: 				}
        !          2044: 			    }
        !          2045: 			    my @pairs=split(/\&/,$what);
        !          2046: 			    my %hash;
        !          2047: 			    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
        !          2048: 				foreach my $pair (@pairs) {
        !          2049: 				    my ($key,$value)=split(/=/,$pair);
        !          2050: 				    &ManagePermissions($key, $udom, $uname,
        !          2051: 						       &GetAuthType( $udom, 
        !          2052: 								     $uname));
        !          2053: 				    $hash{$key}=$value;
        !          2054: 				}
        !          2055: 				if (untie(%hash)) {
        !          2056: 				    print $client "ok\n";
        !          2057: 				} else {
        !          2058: 				    print $client "error: ".($!+0)
        !          2059: 					." untie(GDBM) Failed ".
        !          2060: 					"while attempting rolesput\n";
        !          2061: 				}
        !          2062: 			    } else {
        !          2063: 				print $client "error: ".($!+0)
        !          2064: 				    ." tie(GDBM) Failed ".
        !          2065: 				    "while attempting rolesput\n";
        !          2066: 			    }
        !          2067: 			} else {
        !          2068: 			    print $client "refused\n";
        !          2069: 			}
        !          2070: 		    } else {
        !          2071: 			Reply($client, "refused\n", $userinput);
        !          2072: 		  
        !          2073: 		    }
        !          2074: # -------------------------------------------------------------------- rolesdel
        !          2075: 		} elsif ($userinput =~ /^rolesdel/) {
        !          2076: 		    if(isClient) {
        !          2077: 			&Debug("rolesdel");
        !          2078: 			if ($wasenc==1) {
        !          2079: 			    my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
        !          2080: 				=split(/:/,$userinput);
        !          2081: 			    &Debug("cmd = ".$cmd." exedom= ".$exedom.
        !          2082: 				   "user = ".$exeuser." udom=".$udom.
        !          2083: 				   "what = ".$what);
        !          2084: 			    my $namespace='roles';
        !          2085: 			    chomp($what);
        !          2086: 			    my $proname=propath($udom,$uname);
        !          2087: 			    my $now=time;
        !          2088: 			    {
        !          2089: 				my $hfh;
        !          2090: 				if (
        !          2091: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
        !          2092: 				    ) { 
        !          2093: 				    print $hfh "D:$now:$exedom:$exeuser:$what\n";
        !          2094: 				}
        !          2095: 			    }
        !          2096: 			    my @rolekeys=split(/\&/,$what);
        !          2097: 			    my %hash;
        !          2098: 			    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
        !          2099: 				foreach my $key (@rolekeys) {
        !          2100: 				    delete $hash{$key};
        !          2101: 				}
        !          2102: 				if (untie(%hash)) {
        !          2103: 				    print $client "ok\n";
        !          2104: 				} else {
        !          2105: 				    print $client "error: ".($!+0)
        !          2106: 					." untie(GDBM) Failed ".
        !          2107: 					"while attempting rolesdel\n";
        !          2108: 				}
        !          2109: 			    } else {
        !          2110: 				print $client "error: ".($!+0)
        !          2111: 				    ." tie(GDBM) Failed ".
        !          2112: 				    "while attempting rolesdel\n";
        !          2113: 			    }
        !          2114: 			} else {
        !          2115: 			    print $client "refused\n";
        !          2116: 			}
        !          2117: 		    } else {
        !          2118: 			Reply($client, "refused\n", $userinput);
        !          2119: 		      
        !          2120: 		    }
        !          2121: # ------------------------------------------------------------------------- get
        !          2122: 		} elsif ($userinput =~ /^get/) {
        !          2123: 		    if(isClient) {
        !          2124: 			my ($cmd,$udom,$uname,$namespace,$what)
        !          2125: 			    =split(/:/,$userinput);
        !          2126: 			$namespace=~s/\//\_/g;
        !          2127: 			$namespace=~s/\W//g;
        !          2128: 			chomp($what);
        !          2129: 			my @queries=split(/\&/,$what);
        !          2130: 			my $proname=propath($udom,$uname);
        !          2131: 			my $qresult='';
        !          2132: 			my %hash;
        !          2133: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
        !          2134: 			    for (my $i=0;$i<=$#queries;$i++) {
        !          2135: 				$qresult.="$hash{$queries[$i]}&";
        !          2136: 			    }
        !          2137: 			    if (untie(%hash)) {
        !          2138: 				$qresult=~s/\&$//;
        !          2139: 				print $client "$qresult\n";
        !          2140: 			    } else {
        !          2141: 				print $client "error: ".($!+0)
        !          2142: 				    ." untie(GDBM) Failed ".
        !          2143: 				    "while attempting get\n";
        !          2144: 			    }
        !          2145: 			} else {
        !          2146: 			    if ($!+0 == 2) {
        !          2147: 				print $client "error:No such file or ".
        !          2148: 				    "GDBM reported bad block error\n";
        !          2149: 			    } else {
        !          2150: 				print $client "error: ".($!+0)
        !          2151: 				    ." tie(GDBM) Failed ".
        !          2152: 				    "while attempting get\n";
        !          2153: 			    }
        !          2154: 			}
        !          2155: 		    } else {
        !          2156: 			Reply($client, "refused\n", $userinput);
        !          2157: 		       
        !          2158: 		    }
        !          2159: # ------------------------------------------------------------------------ eget
        !          2160: 		} elsif ($userinput =~ /^eget/) {
        !          2161: 		    if (isClient) {
        !          2162: 			my ($cmd,$udom,$uname,$namespace,$what)
        !          2163: 			    =split(/:/,$userinput);
        !          2164: 			$namespace=~s/\//\_/g;
        !          2165: 			$namespace=~s/\W//g;
        !          2166: 			chomp($what);
        !          2167: 			my @queries=split(/\&/,$what);
        !          2168: 			my $proname=propath($udom,$uname);
        !          2169: 			my $qresult='';
        !          2170: 			my %hash;
        !          2171: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
        !          2172: 			    for (my $i=0;$i<=$#queries;$i++) {
        !          2173: 				$qresult.="$hash{$queries[$i]}&";
        !          2174: 			    }
        !          2175: 			    if (untie(%hash)) {
        !          2176: 				$qresult=~s/\&$//;
        !          2177: 				if ($cipher) {
        !          2178: 				    my $cmdlength=length($qresult);
        !          2179: 				    $qresult.="         ";
        !          2180: 				    my $encqresult='';
        !          2181: 				    for 
        !          2182: 					(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
        !          2183: 					    $encqresult.=
        !          2184: 						unpack("H16",
        !          2185: 						       $cipher->encrypt(substr($qresult,$encidx,8)));
        !          2186: 					}
        !          2187: 				    print $client "enc:$cmdlength:$encqresult\n";
        !          2188: 				} else {
        !          2189: 				    print $client "error:no_key\n";
        !          2190: 				}
        !          2191: 			    } else {
        !          2192: 				print $client "error: ".($!+0)
        !          2193: 				    ." untie(GDBM) Failed ".
        !          2194: 				    "while attempting eget\n";
        !          2195: 			    }
        !          2196: 			} else {
        !          2197: 			    print $client "error: ".($!+0)
        !          2198: 				." tie(GDBM) Failed ".
        !          2199: 				"while attempting eget\n";
        !          2200: 			}
        !          2201: 		    } else {
        !          2202: 			Reply($client, "refused\n", $userinput);
        !          2203: 		    
        !          2204: 		    }
        !          2205: # ------------------------------------------------------------------------- del
        !          2206: 		} elsif ($userinput =~ /^del/) {
        !          2207: 		    if(isClient) {
        !          2208: 			my ($cmd,$udom,$uname,$namespace,$what)
        !          2209: 			    =split(/:/,$userinput);
        !          2210: 			$namespace=~s/\//\_/g;
        !          2211: 			$namespace=~s/\W//g;
        !          2212: 			chomp($what);
        !          2213: 			my $proname=propath($udom,$uname);
        !          2214: 			my $now=time;
        !          2215: 			unless ($namespace=~/^nohist\_/) {
        !          2216: 			    my $hfh;
        !          2217: 			    if (
        !          2218: 				$hfh=IO::File->new(">>$proname/$namespace.hist")
        !          2219: 				) { print $hfh "D:$now:$what\n"; }
        !          2220: 			}
        !          2221: 			my @keys=split(/\&/,$what);
        !          2222: 			my %hash;
        !          2223: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
        !          2224: 			    foreach my $key (@keys) {
        !          2225: 				delete($hash{$key});
        !          2226: 			    }
        !          2227: 			    if (untie(%hash)) {
        !          2228: 				print $client "ok\n";
        !          2229: 			    } else {
        !          2230: 				print $client "error: ".($!+0)
        !          2231: 				    ." untie(GDBM) Failed ".
        !          2232: 				    "while attempting del\n";
        !          2233: 			    }
        !          2234: 			} else {
        !          2235: 			    print $client "error: ".($!+0)
        !          2236: 				." tie(GDBM) Failed ".
        !          2237: 				"while attempting del\n";
        !          2238: 			}
        !          2239: 		    } else {
        !          2240: 			Reply($client, "refused\n", $userinput);
        !          2241: 			
        !          2242: 		    }
        !          2243: # ------------------------------------------------------------------------ keys
        !          2244: 		} elsif ($userinput =~ /^keys/) {
        !          2245: 		    if(isClient) {
        !          2246: 			my ($cmd,$udom,$uname,$namespace)
        !          2247: 			    =split(/:/,$userinput);
        !          2248: 			$namespace=~s/\//\_/g;
        !          2249: 			$namespace=~s/\W//g;
        !          2250: 			my $proname=propath($udom,$uname);
        !          2251: 			my $qresult='';
        !          2252: 			my %hash;
        !          2253: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
        !          2254: 			    foreach my $key (keys %hash) {
        !          2255: 				$qresult.="$key&";
        !          2256: 			    }
        !          2257: 			    if (untie(%hash)) {
        !          2258: 				$qresult=~s/\&$//;
        !          2259: 				print $client "$qresult\n";
        !          2260: 			    } else {
        !          2261: 				print $client "error: ".($!+0)
        !          2262: 				    ." untie(GDBM) Failed ".
        !          2263: 				    "while attempting keys\n";
        !          2264: 			    }
        !          2265: 			} else {
        !          2266: 			    print $client "error: ".($!+0)
        !          2267: 				." tie(GDBM) Failed ".
        !          2268: 				"while attempting keys\n";
        !          2269: 			}
        !          2270: 		    } else {
        !          2271: 			Reply($client, "refused\n", $userinput);
        !          2272: 		   
        !          2273: 		    }
        !          2274: # ----------------------------------------------------------------- dumpcurrent
        !          2275: 		} elsif ($userinput =~ /^currentdump/) {
        !          2276: 		    if (isClient) {
        !          2277: 			my ($cmd,$udom,$uname,$namespace)
        !          2278: 			    =split(/:/,$userinput);
        !          2279: 			$namespace=~s/\//\_/g;
        !          2280: 			$namespace=~s/\W//g;
        !          2281: 			my $qresult='';
        !          2282: 			my $proname=propath($udom,$uname);
        !          2283: 			my %hash;
        !          2284: 			if (tie(%hash,'GDBM_File',
        !          2285: 				"$proname/$namespace.db",
        !          2286: 				&GDBM_READER(),0640)) {
        !          2287: 			    # Structure of %data:
        !          2288: 			    # $data{$symb}->{$parameter}=$value;
        !          2289: 			    # $data{$symb}->{'v.'.$parameter}=$version;
        !          2290: 			    # since $parameter will be unescaped, we do not
        !          2291: 			    # have to worry about silly parameter names...
        !          2292: 			    my %data = ();
        !          2293: 			    while (my ($key,$value) = each(%hash)) {
        !          2294: 				my ($v,$symb,$param) = split(/:/,$key);
        !          2295: 				next if ($v eq 'version' || $symb eq 'keys');
        !          2296: 				next if (exists($data{$symb}) && 
        !          2297: 					 exists($data{$symb}->{$param}) &&
        !          2298: 					 $data{$symb}->{'v.'.$param} > $v);
        !          2299: 				$data{$symb}->{$param}=$value;
        !          2300: 				$data{$symb}->{'v.'.$param}=$v;
        !          2301: 			    }
        !          2302: 			    if (untie(%hash)) {
        !          2303: 				while (my ($symb,$param_hash) = each(%data)) {
        !          2304: 				    while(my ($param,$value) = each (%$param_hash)){
        !          2305: 					next if ($param =~ /^v\./);
        !          2306: 					$qresult.=$symb.':'.$param.'='.$value.'&';
        !          2307: 				    }
        !          2308: 				}
        !          2309: 				chop($qresult);
        !          2310: 				print $client "$qresult\n";
        !          2311: 			    } else {
        !          2312: 				print $client "error: ".($!+0)
        !          2313: 				    ." untie(GDBM) Failed ".
        !          2314: 				    "while attempting currentdump\n";
        !          2315: 			    }
        !          2316: 			} else {
        !          2317: 			    print $client "error: ".($!+0)
        !          2318: 				." tie(GDBM) Failed ".
        !          2319: 				"while attempting currentdump\n";
        !          2320: 			}
        !          2321: 		    } else {
        !          2322: 			Reply($client, "refused\n", $userinput);
        !          2323: 		    }
        !          2324: # ------------------------------------------------------------------------ dump
        !          2325: 		} elsif ($userinput =~ /^dump/) {
        !          2326: 		    if(isClient) {
        !          2327: 			my ($cmd,$udom,$uname,$namespace,$regexp)
        !          2328: 			    =split(/:/,$userinput);
        !          2329: 			$namespace=~s/\//\_/g;
        !          2330: 			$namespace=~s/\W//g;
        !          2331: 			if (defined($regexp)) {
        !          2332: 			    $regexp=&unescape($regexp);
        !          2333: 			} else {
        !          2334: 			    $regexp='.';
        !          2335: 			}
        !          2336: 			my $qresult='';
        !          2337: 			my $proname=propath($udom,$uname);
        !          2338: 			my %hash;
        !          2339: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
        !          2340: 			       study($regexp);
        !          2341: 			       while (my ($key,$value) = each(%hash)) {
        !          2342: 				   if ($regexp eq '.') {
        !          2343: 				       $qresult.=$key.'='.$value.'&';
        !          2344: 				   } else {
        !          2345: 				       my $unescapeKey = &unescape($key);
        !          2346: 				       if (eval('$unescapeKey=~/$regexp/')) {
        !          2347: 					   $qresult.="$key=$value&";
        !          2348: 				       }
        !          2349: 				   }
        !          2350: 			       }
        !          2351: 			       if (untie(%hash)) {
        !          2352: 				   chop($qresult);
        !          2353: 				   print $client "$qresult\n";
        !          2354: 			       } else {
        !          2355: 				   print $client "error: ".($!+0)
        !          2356: 				       ." untie(GDBM) Failed ".
        !          2357:                                        "while attempting dump\n";
        !          2358: 			       }
        !          2359: 			   } else {
        !          2360: 			       print $client "error: ".($!+0)
        !          2361: 				   ." tie(GDBM) Failed ".
        !          2362: 				   "while attempting dump\n";
        !          2363: 			   }
        !          2364: 		    } else {
        !          2365: 			Reply($client, "refused\n", $userinput);
        !          2366: 		 
        !          2367: 		    }
        !          2368: # ----------------------------------------------------------------------- store
        !          2369: 		} elsif ($userinput =~ /^store/) {
        !          2370: 		    if(isClient) {
        !          2371: 			my ($cmd,$udom,$uname,$namespace,$rid,$what)
        !          2372: 			    =split(/:/,$userinput);
        !          2373: 			$namespace=~s/\//\_/g;
        !          2374: 			$namespace=~s/\W//g;
        !          2375: 			if ($namespace ne 'roles') {
        !          2376: 			    chomp($what);
        !          2377: 			    my $proname=propath($udom,$uname);
        !          2378: 			    my $now=time;
        !          2379: 			    unless ($namespace=~/^nohist\_/) {
        !          2380: 				my $hfh;
        !          2381: 				if (
        !          2382: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
        !          2383: 				    ) { print $hfh "P:$now:$rid:$what\n"; }
        !          2384: 			    }
        !          2385: 			    my @pairs=split(/\&/,$what);
        !          2386: 			    my %hash;
        !          2387: 			    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
        !          2388: 				my @previouskeys=split(/&/,$hash{"keys:$rid"});
        !          2389: 				my $key;
        !          2390: 				$hash{"version:$rid"}++;
        !          2391: 				my $version=$hash{"version:$rid"};
        !          2392: 				my $allkeys=''; 
        !          2393: 				foreach my $pair (@pairs) {
        !          2394: 				    my ($key,$value)=split(/=/,$pair);
        !          2395: 				    $allkeys.=$key.':';
        !          2396: 				    $hash{"$version:$rid:$key"}=$value;
        !          2397: 				}
        !          2398: 				$hash{"$version:$rid:timestamp"}=$now;
        !          2399: 				$allkeys.='timestamp';
        !          2400: 				$hash{"$version:keys:$rid"}=$allkeys;
        !          2401: 				if (untie(%hash)) {
        !          2402: 				    print $client "ok\n";
        !          2403: 				} else {
        !          2404: 				    print $client "error: ".($!+0)
        !          2405: 					." untie(GDBM) Failed ".
        !          2406: 					"while attempting store\n";
        !          2407: 				}
        !          2408: 			    } else {
        !          2409: 				print $client "error: ".($!+0)
        !          2410: 				    ." tie(GDBM) Failed ".
        !          2411: 				    "while attempting store\n";
        !          2412: 			    }
        !          2413: 			} else {
        !          2414: 			    print $client "refused\n";
        !          2415: 			}
        !          2416: 		    } else {
        !          2417: 			Reply($client, "refused\n", $userinput);
        !          2418: 		     
        !          2419: 		    }
        !          2420: # --------------------------------------------------------------------- restore
        !          2421: 		} elsif ($userinput =~ /^restore/) {
        !          2422: 		    if(isClient) {
        !          2423: 			my ($cmd,$udom,$uname,$namespace,$rid)
        !          2424: 			    =split(/:/,$userinput);
        !          2425: 			$namespace=~s/\//\_/g;
        !          2426: 			$namespace=~s/\W//g;
        !          2427: 			chomp($rid);
        !          2428: 			my $proname=propath($udom,$uname);
        !          2429: 			my $qresult='';
        !          2430: 			my %hash;
        !          2431: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
        !          2432: 			    my $version=$hash{"version:$rid"};
        !          2433: 			    $qresult.="version=$version&";
        !          2434: 			    my $scope;
        !          2435: 			    for ($scope=1;$scope<=$version;$scope++) {
        !          2436: 				my $vkeys=$hash{"$scope:keys:$rid"};
        !          2437: 				my @keys=split(/:/,$vkeys);
        !          2438: 				my $key;
        !          2439: 				$qresult.="$scope:keys=$vkeys&";
        !          2440: 				foreach $key (@keys) {
        !          2441: 				    $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
        !          2442: 				}                                  
        !          2443: 			    }
        !          2444: 			    if (untie(%hash)) {
        !          2445: 				$qresult=~s/\&$//;
        !          2446: 				print $client "$qresult\n";
        !          2447: 			    } else {
        !          2448: 				print $client "error: ".($!+0)
        !          2449: 				    ." untie(GDBM) Failed ".
        !          2450: 				    "while attempting restore\n";
        !          2451: 			    }
        !          2452: 			} else {
        !          2453: 			    print $client "error: ".($!+0)
        !          2454: 				." tie(GDBM) Failed ".
        !          2455: 				"while attempting restore\n";
        !          2456: 			}
        !          2457: 		    } else  {
        !          2458: 			Reply($client, "refused\n", $userinput);
        !          2459: 		       
        !          2460: 		    }
        !          2461: # -------------------------------------------------------------------- chatsend
        !          2462: 		} elsif ($userinput =~ /^chatsend/) {
        !          2463: 		    if(isClient) {
        !          2464: 			my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
        !          2465: 			&chatadd($cdom,$cnum,$newpost);
        !          2466: 			print $client "ok\n";
        !          2467: 		    } else {
        !          2468: 			Reply($client, "refused\n", $userinput);
        !          2469: 		      
        !          2470: 		    }
        !          2471: # -------------------------------------------------------------------- chatretr
        !          2472: 		} elsif ($userinput =~ /^chatretr/) {
        !          2473: 		    if(isClient) {
        !          2474: 			my 
        !          2475: 			    ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
        !          2476: 			my $reply='';
        !          2477: 			foreach (&getchat($cdom,$cnum,$udom,$uname)) {
        !          2478: 			    $reply.=&escape($_).':';
        !          2479: 			}
        !          2480: 			$reply=~s/\:$//;
        !          2481: 			print $client $reply."\n";
        !          2482: 		    } else {
        !          2483: 			Reply($client, "refused\n", $userinput);
        !          2484: 		       
        !          2485: 		    }
        !          2486: # ------------------------------------------------------------------- querysend
        !          2487: 		} elsif ($userinput =~ /^querysend/) {
        !          2488: 		    if(isClient) {
        !          2489: 			my ($cmd,$query,
        !          2490: 			    $arg1,$arg2,$arg3)=split(/\:/,$userinput);
        !          2491: 			$query=~s/\n*$//g;
        !          2492: 			print $client "".
        !          2493: 			    sqlreply("$clientname\&$query".
        !          2494: 				     "\&$arg1"."\&$arg2"."\&$arg3")."\n";
        !          2495: 		    } else {
        !          2496: 			Reply($client, "refused\n", $userinput);
        !          2497: 		      
        !          2498: 		    }
        !          2499: # ------------------------------------------------------------------ queryreply
        !          2500: 		} elsif ($userinput =~ /^queryreply/) {
        !          2501: 		    if(isClient) {
        !          2502: 			my ($cmd,$id,$reply)=split(/:/,$userinput); 
        !          2503: 			my $store;
        !          2504: 			my $execdir=$perlvar{'lonDaemons'};
        !          2505: 			if ($store=IO::File->new(">$execdir/tmp/$id")) {
        !          2506: 			    $reply=~s/\&/\n/g;
        !          2507: 			    print $store $reply;
        !          2508: 			    close $store;
        !          2509: 			    my $store2=IO::File->new(">$execdir/tmp/$id.end");
        !          2510: 			    print $store2 "done\n";
        !          2511: 			    close $store2;
        !          2512: 			    print $client "ok\n";
        !          2513: 			}
        !          2514: 			else {
        !          2515: 			    print $client "error: ".($!+0)
        !          2516: 				." IO::File->new Failed ".
        !          2517: 				"while attempting queryreply\n";
        !          2518: 			}
        !          2519: 		    } else {
        !          2520: 			Reply($client, "refused\n", $userinput);
        !          2521: 		     
        !          2522: 		    }
        !          2523: # ----------------------------------------------------------------- courseidput
        !          2524: 		} elsif ($userinput =~ /^courseidput/) {
        !          2525: 		    if(isClient) {
        !          2526: 			my ($cmd,$udom,$what)=split(/:/,$userinput);
        !          2527: 			chomp($what);
        !          2528: 			$udom=~s/\W//g;
        !          2529: 			my $proname=
        !          2530: 			    "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
        !          2531: 			my $now=time;
        !          2532: 			my @pairs=split(/\&/,$what);
        !          2533: 			my %hash;
        !          2534: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
        !          2535: 			    foreach my $pair (@pairs) {
        !          2536: 				my ($key,$value)=split(/=/,$pair);
        !          2537: 				$hash{$key}=$value.':'.$now;
        !          2538: 			    }
        !          2539: 			    if (untie(%hash)) {
        !          2540: 				print $client "ok\n";
        !          2541: 			    } else {
        !          2542: 				print $client "error: ".($!+0)
        !          2543: 				    ." untie(GDBM) Failed ".
        !          2544: 				    "while attempting courseidput\n";
        !          2545: 			    }
        !          2546: 			} else {
        !          2547: 			    print $client "error: ".($!+0)
        !          2548: 				." tie(GDBM) Failed ".
        !          2549: 				"while attempting courseidput\n";
        !          2550: 			}
        !          2551: 		    } else {
        !          2552: 			Reply($client, "refused\n", $userinput);
        !          2553: 		       
        !          2554: 		    }
        !          2555: # ---------------------------------------------------------------- courseiddump
        !          2556: 		} elsif ($userinput =~ /^courseiddump/) {
        !          2557: 		    if(isClient) {
        !          2558: 			my ($cmd,$udom,$since,$description)
        !          2559: 			    =split(/:/,$userinput);
        !          2560: 			if (defined($description)) {
        !          2561: 			    $description=&unescape($description);
        !          2562: 			} else {
        !          2563: 			    $description='.';
        !          2564: 			}
        !          2565: 			unless (defined($since)) { $since=0; }
        !          2566: 			my $qresult='';
        !          2567: 			my $proname=
        !          2568: 			    "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
        !          2569: 			my %hash;
        !          2570: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
        !          2571: 			    while (my ($key,$value) = each(%hash)) {
        !          2572: 				my ($descr,$lasttime)=split(/\:/,$value);
        !          2573: 				if ($lasttime<$since) { next; }
        !          2574: 				if ($description eq '.') {
        !          2575: 				    $qresult.=$key.'='.$descr.'&';
        !          2576: 				} else {
        !          2577: 				    my $unescapeVal = &unescape($descr);
        !          2578: 				    if (eval('$unescapeVal=~/$description/i')) {
        !          2579: 					$qresult.="$key=$descr&";
        !          2580: 				    }
        !          2581: 				}
        !          2582: 			    }
        !          2583: 			    if (untie(%hash)) {
        !          2584: 				chop($qresult);
        !          2585: 				print $client "$qresult\n";
        !          2586: 			    } else {
        !          2587: 				print $client "error: ".($!+0)
        !          2588: 				    ." untie(GDBM) Failed ".
        !          2589: 				    "while attempting courseiddump\n";
        !          2590: 			    }
        !          2591: 			} else {
        !          2592: 			    print $client "error: ".($!+0)
        !          2593: 				." tie(GDBM) Failed ".
        !          2594: 				"while attempting courseiddump\n";
        !          2595: 			}
        !          2596: 		    } else {
        !          2597: 			Reply($client, "refused\n", $userinput);
        !          2598: 		       
        !          2599: 		    }
        !          2600: # ----------------------------------------------------------------------- idput
        !          2601: 		} elsif ($userinput =~ /^idput/) {
        !          2602: 		    if(isClient) {
        !          2603: 			my ($cmd,$udom,$what)=split(/:/,$userinput);
        !          2604: 			chomp($what);
        !          2605: 			$udom=~s/\W//g;
        !          2606: 			my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
        !          2607: 			my $now=time;
        !          2608: 			{
        !          2609: 			    my $hfh;
        !          2610: 			    if (
        !          2611: 				$hfh=IO::File->new(">>$proname.hist")
        !          2612: 				) { print $hfh "P:$now:$what\n"; }
        !          2613: 			}
        !          2614: 			my @pairs=split(/\&/,$what);
        !          2615: 			my %hash;
        !          2616: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
        !          2617: 			    foreach my $pair (@pairs) {
        !          2618: 				my ($key,$value)=split(/=/,$pair);
        !          2619: 				$hash{$key}=$value;
        !          2620: 			    }
        !          2621: 			    if (untie(%hash)) {
        !          2622: 				print $client "ok\n";
        !          2623: 			    } else {
        !          2624: 				print $client "error: ".($!+0)
        !          2625: 				    ." untie(GDBM) Failed ".
        !          2626: 				    "while attempting idput\n";
        !          2627: 			    }
        !          2628: 			} else {
        !          2629: 			    print $client "error: ".($!+0)
        !          2630: 				." tie(GDBM) Failed ".
        !          2631: 				"while attempting idput\n";
        !          2632: 			}
        !          2633: 		    } else {
        !          2634: 			Reply($client, "refused\n", $userinput);
        !          2635: 		       
        !          2636: 		    }
        !          2637: # ----------------------------------------------------------------------- idget
        !          2638: 		} elsif ($userinput =~ /^idget/) {
        !          2639: 		    if(isClient) {
        !          2640: 			my ($cmd,$udom,$what)=split(/:/,$userinput);
        !          2641: 			chomp($what);
        !          2642: 			$udom=~s/\W//g;
        !          2643: 			my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
        !          2644: 			my @queries=split(/\&/,$what);
        !          2645: 			my $qresult='';
        !          2646: 			my %hash;
        !          2647: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
        !          2648: 			    for (my $i=0;$i<=$#queries;$i++) {
        !          2649: 				$qresult.="$hash{$queries[$i]}&";
        !          2650: 			    }
        !          2651: 			    if (untie(%hash)) {
        !          2652: 				$qresult=~s/\&$//;
        !          2653: 				print $client "$qresult\n";
        !          2654: 			    } else {
        !          2655: 				print $client "error: ".($!+0)
        !          2656: 				    ." untie(GDBM) Failed ".
        !          2657: 				    "while attempting idget\n";
        !          2658: 			    }
        !          2659: 			} else {
        !          2660: 			    print $client "error: ".($!+0)
        !          2661: 				." tie(GDBM) Failed ".
        !          2662: 				"while attempting idget\n";
        !          2663: 			}
        !          2664: 		    } else {
        !          2665: 			Reply($client, "refused\n", $userinput);
        !          2666: 		       
        !          2667: 		    }
        !          2668: # ---------------------------------------------------------------------- tmpput
        !          2669: 		} elsif ($userinput =~ /^tmpput/) {
        !          2670: 		    if(isClient) {
        !          2671: 			my ($cmd,$what)=split(/:/,$userinput);
        !          2672: 			my $store;
        !          2673: 			$tmpsnum++;
        !          2674: 			my $id=$$.'_'.$clientip.'_'.$tmpsnum;
        !          2675: 			$id=~s/\W/\_/g;
        !          2676: 			$what=~s/\n//g;
        !          2677: 			my $execdir=$perlvar{'lonDaemons'};
        !          2678: 			if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
        !          2679: 			    print $store $what;
        !          2680: 			    close $store;
        !          2681: 			    print $client "$id\n";
        !          2682: 			}
        !          2683: 			else {
        !          2684: 			    print $client "error: ".($!+0)
        !          2685: 				."IO::File->new Failed ".
        !          2686: 				"while attempting tmpput\n";
        !          2687: 			}
        !          2688: 		    } else {
        !          2689: 			Reply($client, "refused\n", $userinput);
        !          2690: 		    
        !          2691: 		    }
        !          2692: 		    
        !          2693: # ---------------------------------------------------------------------- tmpget
        !          2694: 		} elsif ($userinput =~ /^tmpget/) {
        !          2695: 		    if(isClient) {
        !          2696: 			my ($cmd,$id)=split(/:/,$userinput);
        !          2697: 			chomp($id);
        !          2698: 			$id=~s/\W/\_/g;
        !          2699: 			my $store;
        !          2700: 			my $execdir=$perlvar{'lonDaemons'};
        !          2701: 			if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
        !          2702: 			    my $reply=<$store>;
        !          2703: 			    print $client "$reply\n";
        !          2704: 			    close $store;
        !          2705: 			}
        !          2706: 			else {
        !          2707: 			    print $client "error: ".($!+0)
        !          2708: 				."IO::File->new Failed ".
        !          2709: 				"while attempting tmpget\n";
        !          2710: 			}
        !          2711: 		    } else {
        !          2712: 			Reply($client, "refused\n", $userinput);
        !          2713: 		      
        !          2714: 		    }
        !          2715: # ---------------------------------------------------------------------- tmpdel
        !          2716: 		} elsif ($userinput =~ /^tmpdel/) {
        !          2717: 		    if(isClient) {
        !          2718: 			my ($cmd,$id)=split(/:/,$userinput);
        !          2719: 			chomp($id);
        !          2720: 			$id=~s/\W/\_/g;
        !          2721: 			my $execdir=$perlvar{'lonDaemons'};
        !          2722: 			if (unlink("$execdir/tmp/$id.tmp")) {
        !          2723: 			    print $client "ok\n";
        !          2724: 			} else {
        !          2725: 			    print $client "error: ".($!+0)
        !          2726: 				."Unlink tmp Failed ".
        !          2727: 				"while attempting tmpdel\n";
        !          2728: 			}
        !          2729: 		    } else {
        !          2730: 			Reply($client, "refused\n", $userinput);
        !          2731: 		     
        !          2732: 		    }
        !          2733: # -------------------------------------------------------------------------- ls
        !          2734: 		} elsif ($userinput =~ /^ls/) {
        !          2735: 		    if(isClient) {
        !          2736: 			my $obs;
        !          2737: 			my $rights;
        !          2738: 			my ($cmd,$ulsdir)=split(/:/,$userinput);
        !          2739: 			my $ulsout='';
        !          2740: 			my $ulsfn;
        !          2741: 			if (-e $ulsdir) {
        !          2742: 			    if(-d $ulsdir) {
        !          2743: 				if (opendir(LSDIR,$ulsdir)) {
        !          2744: 				    while ($ulsfn=readdir(LSDIR)) {
        !          2745: 					undef $obs, $rights; 
        !          2746: 					my @ulsstats=stat($ulsdir.'/'.$ulsfn);
        !          2747: 					#We do some obsolete checking here
        !          2748: 					if(-e $ulsdir.'/'.$ulsfn.".meta") { 
        !          2749: 					    open(FILE, $ulsdir.'/'.$ulsfn.".meta");
        !          2750: 					    my @obsolete=<FILE>;
        !          2751: 					    foreach my $obsolete (@obsolete) {
        !          2752: 					        if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; } 
        !          2753: 						if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
        !          2754: 					    }
        !          2755: 					}
        !          2756: 					$ulsout.=$ulsfn.'&'.join('&',@ulsstats);
        !          2757: 					if($obs eq '1') { $ulsout.="&1"; }
        !          2758: 					else { $ulsout.="&0"; }
        !          2759: 					if($rights eq '1') { $ulsout.="&1:"; }
        !          2760: 					else { $ulsout.="&0:"; }
        !          2761: 				    }
        !          2762: 				    closedir(LSDIR);
        !          2763: 				}
        !          2764: 			    } else {
        !          2765: 				my @ulsstats=stat($ulsdir);
        !          2766: 				$ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
        !          2767: 			    }
        !          2768: 			} else {
        !          2769: 			    $ulsout='no_such_dir';
        !          2770: 			}
        !          2771: 			if ($ulsout eq '') { $ulsout='empty'; }
        !          2772: 			print $client "$ulsout\n";
        !          2773: 		    } else {
        !          2774: 			Reply($client, "refused\n", $userinput);
        !          2775: 		     
        !          2776: 		    }
        !          2777: # ----------------------------------------------------------------- setannounce
        !          2778: 		} elsif ($userinput =~ /^setannounce/) {
        !          2779: 		    if (isClient) {
        !          2780: 			my ($cmd,$announcement)=split(/:/,$userinput);
        !          2781: 			chomp($announcement);
        !          2782: 			$announcement=&unescape($announcement);
        !          2783: 			if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
        !          2784: 						    '/announcement.txt')) {
        !          2785: 			    print $store $announcement;
        !          2786: 			    close $store;
        !          2787: 			    print $client "ok\n";
        !          2788: 			} else {
        !          2789: 			    print $client "error: ".($!+0)."\n";
        !          2790: 			}
        !          2791: 		    } else {
        !          2792: 			Reply($client, "refused\n", $userinput);
        !          2793: 		       
        !          2794: 		    }
        !          2795: # ------------------------------------------------------------------ Hanging up
        !          2796: 		} elsif (($userinput =~ /^exit/) ||
        !          2797: 			 ($userinput =~ /^init/)) { # no restrictions.
        !          2798: 		    &logthis(
        !          2799: 			     "Client $clientip ($clientname) hanging up: $userinput");
        !          2800: 		    print $client "bye\n";
        !          2801: 		    $client->shutdown(2);        # shutdown the socket forcibly.
        !          2802: 		    $client->close();
        !          2803: 		    last;
1.161     foxr     2804: 
1.178   ! foxr     2805: # ---------------------------------- set current host/domain
        !          2806: 		} elsif ($userinput =~ /^sethost:/) {
        !          2807: 		    if (isClient) {
        !          2808: 			print $client &sethost($userinput)."\n";
        !          2809: 		    } else {
        !          2810: 			print $client "refused\n";
        !          2811: 		    }
        !          2812: #---------------------------------- request file (?) version.
        !          2813: 		} elsif ($userinput =~/^version:/) {
        !          2814: 		    if (isClient) {
        !          2815: 			print $client &version($userinput)."\n";
        !          2816: 		    } else {
        !          2817: 			print $client "refused\n";
        !          2818: 		    }
        !          2819: # ------------------------------------------------------------- unknown command
1.161     foxr     2820: 
1.178   ! foxr     2821: 		} else {
        !          2822: 		    # unknown command
        !          2823: 		    print $client "unknown_cmd\n";
        !          2824: 		}
1.177     foxr     2825: # -------------------------------------------------------------------- complete
1.178   ! foxr     2826: 		alarm(0);
1.161     foxr     2827: 		&status('Listening to '.$clientname);
                   2828: 	    }
1.59      www      2829: # --------------------------------------------- client unknown or fishy, refuse
1.161     foxr     2830: 	} else {
                   2831: 	    print $client "refused\n";
                   2832: 	    $client->close();
                   2833: 	    &logthis("<font color=blue>WARNING: "
                   2834: 		     ."Rejected client $clientip, closing connection</font>");
                   2835: 	}
                   2836:     }             
                   2837:     
1.1       albertel 2838: # =============================================================================
1.161     foxr     2839:     
                   2840:     &logthis("<font color=red>CRITICAL: "
                   2841: 	     ."Disconnect from $clientip ($clientname)</font>");    
                   2842:     
                   2843:     
                   2844:     # this exit is VERY important, otherwise the child will become
                   2845:     # a producer of more and more children, forking yourself into
                   2846:     # process death.
                   2847:     exit;
1.106     foxr     2848:     
1.78      foxr     2849: }
                   2850: 
                   2851: 
                   2852: #
                   2853: #   Checks to see if the input roleput request was to set
                   2854: # an author role.  If so, invokes the lchtmldir script to set
                   2855: # up a correct public_html 
                   2856: # Parameters:
                   2857: #    request   - The request sent to the rolesput subchunk.
                   2858: #                We're looking for  /domain/_au
                   2859: #    domain    - The domain in which the user is having roles doctored.
                   2860: #    user      - Name of the user for which the role is being put.
                   2861: #    authtype  - The authentication type associated with the user.
                   2862: #
                   2863: sub ManagePermissions
                   2864: {
                   2865:     my $request = shift;
                   2866:     my $domain  = shift;
                   2867:     my $user    = shift;
                   2868:     my $authtype= shift;
                   2869: 
                   2870:     # See if the request is of the form /$domain/_au
                   2871:     if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
                   2872: 	my $execdir = $perlvar{'lonDaemons'};
                   2873: 	my $userhome= "/home/$user" ;
1.134     albertel 2874: 	&logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78      foxr     2875: 	system("$execdir/lchtmldir $userhome $user $authtype");
                   2876:     }
                   2877: }
                   2878: #
                   2879: #   GetAuthType - Determines the authorization type of a user in a domain.
                   2880: 
                   2881: #     Returns the authorization type or nouser if there is no such user.
                   2882: #
                   2883: sub GetAuthType 
                   2884: {
                   2885:     my $domain = shift;
                   2886:     my $user   = shift;
                   2887: 
1.79      foxr     2888:     Debug("GetAuthType( $domain, $user ) \n");
1.78      foxr     2889:     my $proname    = &propath($domain, $user); 
                   2890:     my $passwdfile = "$proname/passwd";
                   2891:     if( -e $passwdfile ) {
                   2892: 	my $pf = IO::File->new($passwdfile);
                   2893: 	my $realpassword = <$pf>;
                   2894: 	chomp($realpassword);
1.79      foxr     2895: 	Debug("Password info = $realpassword\n");
1.78      foxr     2896: 	my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79      foxr     2897: 	Debug("Authtype = $authtype, content = $contentpwd\n");
1.78      foxr     2898: 	my $availinfo = '';
1.91      albertel 2899: 	if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78      foxr     2900: 	    $availinfo = $contentpwd;
                   2901: 	}
1.79      foxr     2902: 
1.78      foxr     2903: 	return "$authtype:$availinfo";
                   2904:     }
                   2905:     else {
1.79      foxr     2906: 	Debug("Returning nouser");
1.78      foxr     2907: 	return "nouser";
                   2908:     }
1.1       albertel 2909: }
                   2910: 
1.84      albertel 2911: sub addline {
                   2912:     my ($fname,$hostid,$ip,$newline)=@_;
                   2913:     my $contents;
                   2914:     my $found=0;
                   2915:     my $expr='^'.$hostid.':'.$ip.':';
                   2916:     $expr =~ s/\./\\\./g;
1.134     albertel 2917:     my $sh;
1.84      albertel 2918:     if ($sh=IO::File->new("$fname.subscription")) {
                   2919: 	while (my $subline=<$sh>) {
                   2920: 	    if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
                   2921: 	}
                   2922: 	$sh->close();
                   2923:     }
                   2924:     $sh=IO::File->new(">$fname.subscription");
                   2925:     if ($contents) { print $sh $contents; }
                   2926:     if ($newline) { print $sh $newline; }
                   2927:     $sh->close();
                   2928:     return $found;
1.86      www      2929: }
                   2930: 
                   2931: sub getchat {
1.122     www      2932:     my ($cdom,$cname,$udom,$uname)=@_;
1.87      www      2933:     my %hash;
                   2934:     my $proname=&propath($cdom,$cname);
                   2935:     my @entries=();
1.88      albertel 2936:     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
                   2937: 	    &GDBM_READER(),0640)) {
                   2938: 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
                   2939: 	untie %hash;
1.123     www      2940:     }
1.124     www      2941:     my @participants=();
1.134     albertel 2942:     my $cutoff=time-60;
1.123     www      2943:     if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124     www      2944: 	    &GDBM_WRCREAT(),0640)) {
                   2945:         $hash{$uname.':'.$udom}=time;
1.123     www      2946:         foreach (sort keys %hash) {
                   2947: 	    if ($hash{$_}>$cutoff) {
1.124     www      2948: 		$participants[$#participants+1]='active_participant:'.$_;
1.123     www      2949:             }
                   2950:         }
                   2951:         untie %hash;
1.86      www      2952:     }
1.124     www      2953:     return (@participants,@entries);
1.86      www      2954: }
                   2955: 
                   2956: sub chatadd {
1.88      albertel 2957:     my ($cdom,$cname,$newchat)=@_;
                   2958:     my %hash;
                   2959:     my $proname=&propath($cdom,$cname);
                   2960:     my @entries=();
1.142     www      2961:     my $time=time;
1.88      albertel 2962:     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
                   2963: 	    &GDBM_WRCREAT(),0640)) {
                   2964: 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
                   2965: 	my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
                   2966: 	my ($thentime,$idnum)=split(/\_/,$lastid);
                   2967: 	my $newid=$time.'_000000';
                   2968: 	if ($thentime==$time) {
                   2969: 	    $idnum=~s/^0+//;
                   2970: 	    $idnum++;
                   2971: 	    $idnum=substr('000000'.$idnum,-6,6);
                   2972: 	    $newid=$time.'_'.$idnum;
                   2973: 	}
                   2974: 	$hash{$newid}=$newchat;
                   2975: 	my $expired=$time-3600;
                   2976: 	foreach (keys %hash) {
                   2977: 	    my ($thistime)=($_=~/(\d+)\_/);
                   2978: 	    if ($thistime<$expired) {
1.89      www      2979: 		delete $hash{$_};
1.88      albertel 2980: 	    }
                   2981: 	}
                   2982: 	untie %hash;
1.142     www      2983:     }
                   2984:     {
                   2985: 	my $hfh;
                   2986: 	if ($hfh=IO::File->new(">>$proname/chatroom.log")) { 
                   2987: 	    print $hfh "$time:".&unescape($newchat)."\n";
                   2988: 	}
1.86      www      2989:     }
1.84      albertel 2990: }
                   2991: 
                   2992: sub unsub {
                   2993:     my ($fname,$clientip)=@_;
                   2994:     my $result;
1.161     foxr     2995:     if (unlink("$fname.$clientname")) {
1.84      albertel 2996: 	$result="ok\n";
                   2997:     } else {
                   2998: 	$result="not_subscribed\n";
                   2999:     }
                   3000:     if (-e "$fname.subscription") {
1.161     foxr     3001: 	my $found=&addline($fname,$clientname,$clientip,'');
1.84      albertel 3002: 	if ($found) { $result="ok\n"; }
                   3003:     } else {
                   3004: 	if ($result != "ok\n") { $result="not_subscribed\n"; }
                   3005:     }
                   3006:     return $result;
                   3007: }
                   3008: 
1.101     www      3009: sub currentversion {
                   3010:     my $fname=shift;
                   3011:     my $version=-1;
                   3012:     my $ulsdir='';
                   3013:     if ($fname=~/^(.+)\/[^\/]+$/) {
                   3014:        $ulsdir=$1;
                   3015:     }
1.114     albertel 3016:     my ($fnamere1,$fnamere2);
                   3017:     # remove version if already specified
1.101     www      3018:     $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114     albertel 3019:     # get the bits that go before and after the version number
                   3020:     if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
                   3021: 	$fnamere1=$1;
                   3022: 	$fnamere2='.'.$2;
                   3023:     }
1.101     www      3024:     if (-e $fname) { $version=1; }
                   3025:     if (-e $ulsdir) {
1.134     albertel 3026: 	if(-d $ulsdir) {
                   3027: 	    if (opendir(LSDIR,$ulsdir)) {
                   3028: 		my $ulsfn;
                   3029: 		while ($ulsfn=readdir(LSDIR)) {
1.101     www      3030: # see if this is a regular file (ignore links produced earlier)
1.134     albertel 3031: 		    my $thisfile=$ulsdir.'/'.$ulsfn;
                   3032: 		    unless (-l $thisfile) {
1.160     www      3033: 			if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134     albertel 3034: 			    if ($1>$version) { $version=$1; }
                   3035: 			}
                   3036: 		    }
                   3037: 		}
                   3038: 		closedir(LSDIR);
                   3039: 		$version++;
                   3040: 	    }
                   3041: 	}
                   3042:     }
                   3043:     return $version;
1.101     www      3044: }
                   3045: 
                   3046: sub thisversion {
                   3047:     my $fname=shift;
                   3048:     my $version=-1;
                   3049:     if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
                   3050: 	$version=$1;
                   3051:     }
                   3052:     return $version;
                   3053: }
                   3054: 
1.84      albertel 3055: sub subscribe {
                   3056:     my ($userinput,$clientip)=@_;
                   3057:     my $result;
                   3058:     my ($cmd,$fname)=split(/:/,$userinput);
                   3059:     my $ownership=&ishome($fname);
                   3060:     if ($ownership eq 'owner') {
1.101     www      3061: # explitly asking for the current version?
                   3062:         unless (-e $fname) {
                   3063:             my $currentversion=&currentversion($fname);
                   3064: 	    if (&thisversion($fname)==$currentversion) {
                   3065:                 if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
                   3066: 		    my $root=$1;
                   3067:                     my $extension=$2;
                   3068:                     symlink($root.'.'.$extension,
                   3069:                             $root.'.'.$currentversion.'.'.$extension);
1.102     www      3070:                     unless ($extension=~/\.meta$/) {
                   3071:                        symlink($root.'.'.$extension.'.meta',
                   3072:                             $root.'.'.$currentversion.'.'.$extension.'.meta');
                   3073: 		    }
1.101     www      3074:                 }
                   3075:             }
                   3076:         }
1.84      albertel 3077: 	if (-e $fname) {
                   3078: 	    if (-d $fname) {
                   3079: 		$result="directory\n";
                   3080: 	    } else {
1.161     foxr     3081: 		if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134     albertel 3082: 		my $now=time;
1.161     foxr     3083: 		my $found=&addline($fname,$clientname,$clientip,
                   3084: 				   "$clientname:$clientip:$now\n");
1.84      albertel 3085: 		if ($found) { $result="$fname\n"; }
                   3086: 		# if they were subscribed to only meta data, delete that
                   3087:                 # subscription, when you subscribe to a file you also get
                   3088:                 # the metadata
                   3089: 		unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
                   3090: 		$fname=~s/\/home\/httpd\/html\/res/raw/;
                   3091: 		$fname="http://$thisserver/".$fname;
                   3092: 		$result="$fname\n";
                   3093: 	    }
                   3094: 	} else {
                   3095: 	    $result="not_found\n";
                   3096: 	}
                   3097:     } else {
                   3098: 	$result="rejected\n";
                   3099:     }
                   3100:     return $result;
                   3101: }
1.91      albertel 3102: 
                   3103: sub make_passwd_file {
1.98      foxr     3104:     my ($uname, $umode,$npass,$passfilename)=@_;
1.91      albertel 3105:     my $result="ok\n";
                   3106:     if ($umode eq 'krb4' or $umode eq 'krb5') {
                   3107: 	{
                   3108: 	    my $pf = IO::File->new(">$passfilename");
                   3109: 	    print $pf "$umode:$npass\n";
                   3110: 	}
                   3111:     } elsif ($umode eq 'internal') {
                   3112: 	my $salt=time;
                   3113: 	$salt=substr($salt,6,2);
                   3114: 	my $ncpass=crypt($npass,$salt);
                   3115: 	{
                   3116: 	    &Debug("Creating internal auth");
                   3117: 	    my $pf = IO::File->new(">$passfilename");
                   3118: 	    print $pf "internal:$ncpass\n"; 
                   3119: 	}
                   3120:     } elsif ($umode eq 'localauth') {
                   3121: 	{
                   3122: 	    my $pf = IO::File->new(">$passfilename");
                   3123: 	    print $pf "localauth:$npass\n";
                   3124: 	}
                   3125:     } elsif ($umode eq 'unix') {
                   3126: 	{
                   3127: 	    my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
                   3128: 	    {
                   3129: 		&Debug("Executing external: ".$execpath);
1.98      foxr     3130: 		&Debug("user  = ".$uname.", Password =". $npass);
1.132     matthew  3131: 		my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91      albertel 3132: 		print $se "$uname\n";
                   3133: 		print $se "$npass\n";
                   3134: 		print $se "$npass\n";
1.97      foxr     3135: 	    }
                   3136: 	    my $useraddok = $?;
                   3137: 	    if($useraddok > 0) {
                   3138: 		&logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1.91      albertel 3139: 	    }
                   3140: 	    my $pf = IO::File->new(">$passfilename");
                   3141: 	    print $pf "unix:\n";
                   3142: 	}
                   3143:     } elsif ($umode eq 'none') {
                   3144: 	{
                   3145: 	    my $pf = IO::File->new(">$passfilename");
                   3146: 	    print $pf "none:\n";
                   3147: 	}
                   3148:     } else {
                   3149: 	$result="auth_mode_error\n";
                   3150:     }
                   3151:     return $result;
1.121     albertel 3152: }
                   3153: 
                   3154: sub sethost {
                   3155:     my ($remotereq) = @_;
                   3156:     my (undef,$hostid)=split(/:/,$remotereq);
                   3157:     if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
                   3158:     if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
                   3159: 	$currenthostid=$hostid;
                   3160: 	$currentdomainid=$hostdom{$hostid};
                   3161: 	&logthis("Setting hostid to $hostid, and domain to $currentdomainid");
                   3162:     } else {
                   3163: 	&logthis("Requested host id $hostid not an alias of ".
                   3164: 		 $perlvar{'lonHostID'}." refusing connection");
                   3165: 	return 'unable_to_set';
                   3166:     }
                   3167:     return 'ok';
                   3168: }
                   3169: 
                   3170: sub version {
                   3171:     my ($userinput)=@_;
                   3172:     $remoteVERSION=(split(/:/,$userinput))[1];
                   3173:     return "version:$VERSION";
1.127     albertel 3174: }
1.178   ! foxr     3175: 
1.128     albertel 3176: #There is a copy of this in lonnet.pm
1.127     albertel 3177: sub userload {
                   3178:     my $numusers=0;
                   3179:     {
                   3180: 	opendir(LONIDS,$perlvar{'lonIDsDir'});
                   3181: 	my $filename;
                   3182: 	my $curtime=time;
                   3183: 	while ($filename=readdir(LONIDS)) {
                   3184: 	    if ($filename eq '.' || $filename eq '..') {next;}
1.138     albertel 3185: 	    my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159     albertel 3186: 	    if ($curtime-$mtime < 1800) { $numusers++; }
1.127     albertel 3187: 	}
                   3188: 	closedir(LONIDS);
                   3189:     }
                   3190:     my $userloadpercent=0;
                   3191:     my $maxuserload=$perlvar{'lonUserLoadLim'};
                   3192:     if ($maxuserload) {
1.129     albertel 3193: 	$userloadpercent=100*$numusers/$maxuserload;
1.127     albertel 3194:     }
1.130     albertel 3195:     $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127     albertel 3196:     return $userloadpercent;
1.91      albertel 3197: }
                   3198: 
1.61      harris41 3199: # ----------------------------------- POD (plain old documentation, CPAN style)
                   3200: 
                   3201: =head1 NAME
                   3202: 
                   3203: lond - "LON Daemon" Server (port "LOND" 5663)
                   3204: 
                   3205: =head1 SYNOPSIS
                   3206: 
1.74      harris41 3207: Usage: B<lond>
                   3208: 
                   3209: Should only be run as user=www.  This is a command-line script which
                   3210: is invoked by B<loncron>.  There is no expectation that a typical user
                   3211: will manually start B<lond> from the command-line.  (In other words,
                   3212: DO NOT START B<lond> YOURSELF.)
1.61      harris41 3213: 
                   3214: =head1 DESCRIPTION
                   3215: 
1.74      harris41 3216: There are two characteristics associated with the running of B<lond>,
                   3217: PROCESS MANAGEMENT (starting, stopping, handling child processes)
                   3218: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
                   3219: subscriptions, etc).  These are described in two large
                   3220: sections below.
                   3221: 
                   3222: B<PROCESS MANAGEMENT>
                   3223: 
1.61      harris41 3224: Preforker - server who forks first. Runs as a daemon. HUPs.
                   3225: Uses IDEA encryption
                   3226: 
1.74      harris41 3227: B<lond> forks off children processes that correspond to the other servers
                   3228: in the network.  Management of these processes can be done at the
                   3229: parent process level or the child process level.
                   3230: 
                   3231: B<logs/lond.log> is the location of log messages.
                   3232: 
                   3233: The process management is now explained in terms of linux shell commands,
                   3234: subroutines internal to this code, and signal assignments:
                   3235: 
                   3236: =over 4
                   3237: 
                   3238: =item *
                   3239: 
                   3240: PID is stored in B<logs/lond.pid>
                   3241: 
                   3242: This is the process id number of the parent B<lond> process.
                   3243: 
                   3244: =item *
                   3245: 
                   3246: SIGTERM and SIGINT
                   3247: 
                   3248: Parent signal assignment:
                   3249:  $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                   3250: 
                   3251: Child signal assignment:
                   3252:  $SIG{INT}  = 'DEFAULT'; (and SIGTERM is DEFAULT also)
                   3253: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
                   3254:  to restart a new child.)
                   3255: 
                   3256: Command-line invocations:
                   3257:  B<kill> B<-s> SIGTERM I<PID>
                   3258:  B<kill> B<-s> SIGINT I<PID>
                   3259: 
                   3260: Subroutine B<HUNTSMAN>:
                   3261:  This is only invoked for the B<lond> parent I<PID>.
                   3262: This kills all the children, and then the parent.
                   3263: The B<lonc.pid> file is cleared.
                   3264: 
                   3265: =item *
                   3266: 
                   3267: SIGHUP
                   3268: 
                   3269: Current bug:
                   3270:  This signal can only be processed the first time
                   3271: on the parent process.  Subsequent SIGHUP signals
                   3272: have no effect.
                   3273: 
                   3274: Parent signal assignment:
                   3275:  $SIG{HUP}  = \&HUPSMAN;
                   3276: 
                   3277: Child signal assignment:
                   3278:  none (nothing happens)
                   3279: 
                   3280: Command-line invocations:
                   3281:  B<kill> B<-s> SIGHUP I<PID>
                   3282: 
                   3283: Subroutine B<HUPSMAN>:
                   3284:  This is only invoked for the B<lond> parent I<PID>,
                   3285: This kills all the children, and then the parent.
                   3286: The B<lond.pid> file is cleared.
                   3287: 
                   3288: =item *
                   3289: 
                   3290: SIGUSR1
                   3291: 
                   3292: Parent signal assignment:
                   3293:  $SIG{USR1} = \&USRMAN;
                   3294: 
                   3295: Child signal assignment:
                   3296:  $SIG{USR1}= \&logstatus;
                   3297: 
                   3298: Command-line invocations:
                   3299:  B<kill> B<-s> SIGUSR1 I<PID>
                   3300: 
                   3301: Subroutine B<USRMAN>:
                   3302:  When invoked for the B<lond> parent I<PID>,
                   3303: SIGUSR1 is sent to all the children, and the status of
                   3304: each connection is logged.
1.144     foxr     3305: 
                   3306: =item *
                   3307: 
                   3308: SIGUSR2
                   3309: 
                   3310: Parent Signal assignment:
                   3311:     $SIG{USR2} = \&UpdateHosts
                   3312: 
                   3313: Child signal assignment:
                   3314:     NONE
                   3315: 
1.74      harris41 3316: 
                   3317: =item *
                   3318: 
                   3319: SIGCHLD
                   3320: 
                   3321: Parent signal assignment:
                   3322:  $SIG{CHLD} = \&REAPER;
                   3323: 
                   3324: Child signal assignment:
                   3325:  none
                   3326: 
                   3327: Command-line invocations:
                   3328:  B<kill> B<-s> SIGCHLD I<PID>
                   3329: 
                   3330: Subroutine B<REAPER>:
                   3331:  This is only invoked for the B<lond> parent I<PID>.
                   3332: Information pertaining to the child is removed.
                   3333: The socket port is cleaned up.
                   3334: 
                   3335: =back
                   3336: 
                   3337: B<SERVER-SIDE ACTIVITIES>
                   3338: 
                   3339: Server-side information can be accepted in an encrypted or non-encrypted
                   3340: method.
                   3341: 
                   3342: =over 4
                   3343: 
                   3344: =item ping
                   3345: 
                   3346: Query a client in the hosts.tab table; "Are you there?"
                   3347: 
                   3348: =item pong
                   3349: 
                   3350: Respond to a ping query.
                   3351: 
                   3352: =item ekey
                   3353: 
                   3354: Read in encrypted key, make cipher.  Respond with a buildkey.
                   3355: 
                   3356: =item load
                   3357: 
                   3358: Respond with CPU load based on a computation upon /proc/loadavg.
                   3359: 
                   3360: =item currentauth
                   3361: 
                   3362: Reply with current authentication information (only over an
                   3363: encrypted channel).
                   3364: 
                   3365: =item auth
                   3366: 
                   3367: Only over an encrypted channel, reply as to whether a user's
                   3368: authentication information can be validated.
                   3369: 
                   3370: =item passwd
                   3371: 
                   3372: Allow for a password to be set.
                   3373: 
                   3374: =item makeuser
                   3375: 
                   3376: Make a user.
                   3377: 
                   3378: =item passwd
                   3379: 
                   3380: Allow for authentication mechanism and password to be changed.
                   3381: 
                   3382: =item home
1.61      harris41 3383: 
1.74      harris41 3384: Respond to a question "are you the home for a given user?"
                   3385: 
                   3386: =item update
                   3387: 
                   3388: Update contents of a subscribed resource.
                   3389: 
                   3390: =item unsubscribe
                   3391: 
                   3392: The server is unsubscribing from a resource.
                   3393: 
                   3394: =item subscribe
                   3395: 
                   3396: The server is subscribing to a resource.
                   3397: 
                   3398: =item log
                   3399: 
                   3400: Place in B<logs/lond.log>
                   3401: 
                   3402: =item put
                   3403: 
                   3404: stores hash in namespace
                   3405: 
                   3406: =item rolesput
                   3407: 
                   3408: put a role into a user's environment
                   3409: 
                   3410: =item get
                   3411: 
                   3412: returns hash with keys from array
                   3413: reference filled in from namespace
                   3414: 
                   3415: =item eget
                   3416: 
                   3417: returns hash with keys from array
                   3418: reference filled in from namesp (encrypts the return communication)
                   3419: 
                   3420: =item rolesget
                   3421: 
                   3422: get a role from a user's environment
                   3423: 
                   3424: =item del
                   3425: 
                   3426: deletes keys out of array from namespace
                   3427: 
                   3428: =item keys
                   3429: 
                   3430: returns namespace keys
                   3431: 
                   3432: =item dump
                   3433: 
                   3434: dumps the complete (or key matching regexp) namespace into a hash
                   3435: 
                   3436: =item store
                   3437: 
                   3438: stores hash permanently
                   3439: for this url; hashref needs to be given and should be a \%hashname; the
                   3440: remaining args aren't required and if they aren't passed or are '' they will
                   3441: be derived from the ENV
                   3442: 
                   3443: =item restore
                   3444: 
                   3445: returns a hash for a given url
                   3446: 
                   3447: =item querysend
                   3448: 
                   3449: Tells client about the lonsql process that has been launched in response
                   3450: to a sent query.
                   3451: 
                   3452: =item queryreply
                   3453: 
                   3454: Accept information from lonsql and make appropriate storage in temporary
                   3455: file space.
                   3456: 
                   3457: =item idput
                   3458: 
                   3459: Defines usernames as corresponding to IDs.  (These "IDs" are unique identifiers
                   3460: for each student, defined perhaps by the institutional Registrar.)
                   3461: 
                   3462: =item idget
                   3463: 
                   3464: Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
                   3465: for each student, defined perhaps by the institutional Registrar.)
                   3466: 
                   3467: =item tmpput
                   3468: 
                   3469: Accept and store information in temporary space.
                   3470: 
                   3471: =item tmpget
                   3472: 
                   3473: Send along temporarily stored information.
                   3474: 
                   3475: =item ls
                   3476: 
                   3477: List part of a user's directory.
                   3478: 
1.135     foxr     3479: =item pushtable
                   3480: 
                   3481: Pushes a file in /home/httpd/lonTab directory.  Currently limited to:
                   3482: hosts.tab and domain.tab. The old file is copied to  *.tab.backup but
                   3483: must be restored manually in case of a problem with the new table file.
                   3484: pushtable requires that the request be encrypted and validated via
                   3485: ValidateManager.  The form of the command is:
                   3486: enc:pushtable tablename <tablecontents> \n
                   3487: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a 
                   3488: cleartext newline.
                   3489: 
1.74      harris41 3490: =item Hanging up (exit or init)
                   3491: 
                   3492: What to do when a client tells the server that they (the client)
                   3493: are leaving the network.
                   3494: 
                   3495: =item unknown command
                   3496: 
                   3497: If B<lond> is sent an unknown command (not in the list above),
                   3498: it replys to the client "unknown_cmd".
1.135     foxr     3499: 
1.74      harris41 3500: 
                   3501: =item UNKNOWN CLIENT
                   3502: 
                   3503: If the anti-spoofing algorithm cannot verify the client,
                   3504: the client is rejected (with a "refused" message sent
                   3505: to the client, and the connection is closed.
                   3506: 
                   3507: =back
1.61      harris41 3508: 
                   3509: =head1 PREREQUISITES
                   3510: 
                   3511: IO::Socket
                   3512: IO::File
                   3513: Apache::File
                   3514: Symbol
                   3515: POSIX
                   3516: Crypt::IDEA
                   3517: LWP::UserAgent()
                   3518: GDBM_File
                   3519: Authen::Krb4
1.91      albertel 3520: Authen::Krb5
1.61      harris41 3521: 
                   3522: =head1 COREQUISITES
                   3523: 
                   3524: =head1 OSNAMES
                   3525: 
                   3526: linux
                   3527: 
                   3528: =head1 SCRIPT CATEGORIES
                   3529: 
                   3530: Server/Process
                   3531: 
                   3532: =cut

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