Annotation of loncom/lond, revision 1.172

1.1       albertel    1: #!/usr/bin/perl
                      2: # The LearningOnline Network
                      3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60      www         4: #
1.172   ! www         5: # $Id: lond,v 1.171 2004/01/14 01:08:31 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
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     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: 
1.172   ! www        56: my $VERSION='$Revision: 1.171 $'; #' 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: 
1.161     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: #
                     74: 
                     75: my $ConnectionType;
                     76: 
1.134     albertel   77: my %hostid;
                     78: my %hostdom;
                     79: my %hostip;
1.161     foxr       80: 
                     81: my %managers;			# Ip -> manager names
                     82: 
1.141     foxr       83: my %perlvar;			# Will have the apache conf defined perl vars.
1.134     albertel   84: 
1.96      foxr       85: #
                     86: #  The array below are password error strings."
                     87: #
1.97      foxr       88: my $lastpwderror    = 13;		# Largest error number from lcpasswd.
1.96      foxr       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",
1.97      foxr       99: 		   "lcpasswd Invalid characters in password",
                    100: 		    "11", "12",
                    101: 		    "lcpasswd Password mismatch");
                    102: 
                    103: 
                    104: #  The array below are lcuseradd error strings.:
                    105: 
                    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",
1.153     www       113: 		    "lcuseradd Unable to make www member of users's group",
1.97      foxr      114: 		    "lcuseradd Unable to su to root",
                    115: 		    "lcuseradd Unable to set password",
1.153     www       116: 		    "lcuseradd Usrname has invalid characters",
1.97      foxr      117: 		    "lcuseradd Password has an invalid character",
                    118: 		    "lcuseradd User already exists",
                    119: 		    "lcuseradd Could not add user.",
                    120: 		    "lcuseradd Password mismatch");
                    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 $clientip;
                    138: }
1.161     foxr      139: 
                    140: #
                    141: #   Return true if client is a manager.
                    142: #
                    143: sub isManager {
                    144:     return (($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: }
                    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
                    815: my $children               = 0;        # current number of children
1.1       albertel  816: 
                    817: sub REAPER {                        # takes care of dead children
                    818:     $SIG{CHLD} = \&REAPER;
1.165     albertel  819:     &status("Handling child death");
1.1       albertel  820:     my $pid = wait;
1.67      albertel  821:     if (defined($children{$pid})) {
                    822: 	&logthis("Child $pid died");
                    823: 	$children --;
                    824: 	delete $children{$pid};
                    825:     } else {
                    826: 	&logthis("Unknown Child $pid died");
                    827:     }
1.165     albertel  828:     &status("Finished Handling child death");
1.1       albertel  829: }
                    830: 
                    831: sub HUNTSMAN {                      # signal handler for SIGINT
1.165     albertel  832:     &status("Killing children (INT)");
1.1       albertel  833:     local($SIG{CHLD}) = 'IGNORE';   # we're going to kill our children
                    834:     kill 'INT' => keys %children;
1.59      www       835:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1       albertel  836:     my $execdir=$perlvar{'lonDaemons'};
                    837:     unlink("$execdir/logs/lond.pid");
1.9       www       838:     &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.165     albertel  839:     &status("Done killing children");
1.1       albertel  840:     exit;                           # clean up with dignity
                    841: }
                    842: 
                    843: sub HUPSMAN {                      # signal handler for SIGHUP
                    844:     local($SIG{CHLD}) = 'IGNORE';  # we're going to kill our children
1.165     albertel  845:     &status("Killing children for restart (HUP)");
1.1       albertel  846:     kill 'INT' => keys %children;
1.59      www       847:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9       www       848:     &logthis("<font color=red>CRITICAL: Restarting</font>");
1.134     albertel  849:     my $execdir=$perlvar{'lonDaemons'};
1.30      harris41  850:     unlink("$execdir/logs/lond.pid");
1.165     albertel  851:     &status("Restarting self (HUP)");
1.1       albertel  852:     exec("$execdir/lond");         # here we go again
                    853: }
                    854: 
1.144     foxr      855: #
1.148     foxr      856: #    Kill off hashes that describe the host table prior to re-reading it.
                    857: #    Hashes affected are:
                    858: #       %hostid, %hostdom %hostip
                    859: #
                    860: sub KillHostHashes {
                    861:     foreach my $key (keys %hostid) {
                    862: 	delete $hostid{$key};
                    863:     }
                    864:     foreach my $key (keys %hostdom) {
                    865: 	delete $hostdom{$key};
                    866:     }
                    867:     foreach my $key (keys %hostip) {
                    868: 	delete $hostip{$key};
                    869:     }
                    870: }
                    871: #
                    872: #   Read in the host table from file and distribute it into the various hashes:
                    873: #
                    874: #    - %hostid  -  Indexed by IP, the loncapa hostname.
                    875: #    - %hostdom -  Indexed by  loncapa hostname, the domain.
                    876: #    - %hostip  -  Indexed by hostid, the Ip address of the host.
                    877: sub ReadHostTable {
                    878: 
                    879:     open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
                    880:     
                    881:     while (my $configline=<CONFIG>) {
                    882: 	my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
                    883: 	chomp($ip); $ip=~s/\D+$//;
                    884: 	$hostid{$ip}=$id;
                    885: 	$hostdom{$id}=$domain;
                    886: 	$hostip{$id}=$ip;
                    887: 	if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
                    888:     }
                    889:     close(CONFIG);
                    890: }
                    891: #
                    892: #  Reload the Apache daemon's state.
1.150     foxr      893: #  This is done by invoking /home/httpd/perl/apachereload
                    894: #  a setuid perl script that can be root for us to do this job.
1.148     foxr      895: #
                    896: sub ReloadApache {
1.150     foxr      897:     my $execdir = $perlvar{'lonDaemons'};
                    898:     my $script  = $execdir."/apachereload";
                    899:     system($script);
1.148     foxr      900: }
                    901: 
                    902: #
1.144     foxr      903: #   Called in response to a USR2 signal.
                    904: #   - Reread hosts.tab
                    905: #   - All children connected to hosts that were removed from hosts.tab
                    906: #     are killed via SIGINT
                    907: #   - All children connected to previously existing hosts are sent SIGUSR1
                    908: #   - Our internal hosts hash is updated to reflect the new contents of
                    909: #     hosts.tab causing connections from hosts added to hosts.tab to
                    910: #     now be honored.
                    911: #
                    912: sub UpdateHosts {
1.165     albertel  913:     &status("Reload hosts.tab");
1.147     foxr      914:     logthis('<font color="blue"> Updating connections </font>');
1.148     foxr      915:     #
                    916:     #  The %children hash has the set of IP's we currently have children
                    917:     #  on.  These need to be matched against records in the hosts.tab
                    918:     #  Any ip's no longer in the table get killed off they correspond to
                    919:     #  either dropped or changed hosts.  Note that the re-read of the table
                    920:     #  will take care of new and changed hosts as connections come into being.
                    921: 
                    922: 
                    923:     KillHostHashes;
                    924:     ReadHostTable;
                    925: 
                    926:     foreach my $child (keys %children) {
                    927: 	my $childip = $children{$child};
                    928: 	if(!$hostid{$childip}) {
1.149     foxr      929: 	    logthis('<font color="blue"> UpdateHosts killing child '
                    930: 		    ." $child for ip $childip </font>");
1.148     foxr      931: 	    kill('INT', $child);
1.149     foxr      932: 	} else {
                    933: 	    logthis('<font color="green"> keeping child for ip '
                    934: 		    ." $childip (pid=$child) </font>");
1.148     foxr      935: 	}
                    936:     }
                    937:     ReloadApache;
1.165     albertel  938:     &status("Finished reloading hosts.tab");
1.144     foxr      939: }
                    940: 
1.148     foxr      941: 
1.57      www       942: sub checkchildren {
1.165     albertel  943:     &status("Checking on the children (sending signals)");
1.57      www       944:     &initnewstatus();
                    945:     &logstatus();
                    946:     &logthis('Going to check on the children');
1.134     albertel  947:     my $docdir=$perlvar{'lonDocRoot'};
1.61      harris41  948:     foreach (sort keys %children) {
1.57      www       949: 	sleep 1;
                    950:         unless (kill 'USR1' => $_) {
                    951: 	    &logthis ('Child '.$_.' is dead');
                    952:             &logstatus($$.' is dead');
                    953:         } 
1.61      harris41  954:     }
1.63      www       955:     sleep 5;
1.113     albertel  956:     $SIG{ALRM} = sub { die "timeout" };
                    957:     $SIG{__DIE__} = 'DEFAULT';
1.165     albertel  958:     &status("Checking on the children (waiting for reports)");
1.63      www       959:     foreach (sort keys %children) {
                    960:         unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113     albertel  961:           eval {
                    962:             alarm(300);
1.63      www       963: 	    &logthis('Child '.$_.' did not respond');
1.67      albertel  964: 	    kill 9 => $_;
1.131     albertel  965: 	    #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
                    966: 	    #$subj="LON: $currenthostid killed lond process $_";
                    967: 	    #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
                    968: 	    #$execdir=$perlvar{'lonDaemons'};
                    969: 	    #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.113     albertel  970: 	    alarm(0);
                    971: 	  }
1.63      www       972:         }
                    973:     }
1.113     albertel  974:     $SIG{ALRM} = 'DEFAULT';
1.155     albertel  975:     $SIG{__DIE__} = \&catchexception;
1.165     albertel  976:     &status("Finished checking children");
1.57      www       977: }
                    978: 
1.1       albertel  979: # --------------------------------------------------------------------- Logging
                    980: 
                    981: sub logthis {
                    982:     my $message=shift;
                    983:     my $execdir=$perlvar{'lonDaemons'};
                    984:     my $fh=IO::File->new(">>$execdir/logs/lond.log");
                    985:     my $now=time;
                    986:     my $local=localtime($now);
1.58      www       987:     $lastlog=$local.': '.$message;
1.1       albertel  988:     print $fh "$local ($$): $message\n";
                    989: }
                    990: 
1.77      foxr      991: # ------------------------- Conditional log if $DEBUG true.
                    992: sub Debug {
                    993:     my $message = shift;
                    994:     if($DEBUG) {
                    995: 	&logthis($message);
                    996:     }
                    997: }
1.161     foxr      998: 
                    999: #
                   1000: #   Sub to do replies to client.. this gives a hook for some
                   1001: #   debug tracing too:
                   1002: #  Parameters:
                   1003: #     fd      - File open on client.
                   1004: #     reply   - Text to send to client.
                   1005: #     request - Original request from client.
                   1006: #
                   1007: sub Reply {
                   1008:     my $fd      = shift;
                   1009:     my $reply   = shift;
                   1010:     my $request = shift;
                   1011: 
                   1012:     print $fd $reply;
                   1013:     Debug("Request was $request  Reply was $reply");
                   1014: 
                   1015: }
1.57      www      1016: # ------------------------------------------------------------------ Log status
                   1017: 
                   1018: sub logstatus {
1.165     albertel 1019:     &status("Doing logging");
1.57      www      1020:     my $docdir=$perlvar{'lonDocRoot'};
1.63      www      1021:     {
1.57      www      1022:     my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
1.115     albertel 1023:     print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
1.63      www      1024:     $fh->close();
                   1025:     }
1.165     albertel 1026:     &status("Finished londstatus.txt");
1.63      www      1027:     {
                   1028: 	my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
                   1029:         print $fh $status."\n".$lastlog."\n".time;
                   1030:         $fh->close();
                   1031:     }
1.165     albertel 1032:     &status("Finished logging");
1.57      www      1033: }
                   1034: 
                   1035: sub initnewstatus {
                   1036:     my $docdir=$perlvar{'lonDocRoot'};
                   1037:     my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
                   1038:     my $now=time;
                   1039:     my $local=localtime($now);
                   1040:     print $fh "LOND status $local - parent $$\n\n";
1.64      www      1041:     opendir(DIR,"$docdir/lon-status/londchld");
1.134     albertel 1042:     while (my $filename=readdir(DIR)) {
1.64      www      1043:         unlink("$docdir/lon-status/londchld/$filename");
                   1044:     }
                   1045:     closedir(DIR);
1.57      www      1046: }
                   1047: 
                   1048: # -------------------------------------------------------------- Status setting
                   1049: 
                   1050: sub status {
                   1051:     my $what=shift;
                   1052:     my $now=time;
                   1053:     my $local=localtime($now);
                   1054:     $status=$local.': '.$what;
1.103     www      1055:     $0='lond: '.$what.' '.$local;
1.57      www      1056: }
1.11      www      1057: 
                   1058: # -------------------------------------------------------- Escape Special Chars
                   1059: 
                   1060: sub escape {
                   1061:     my $str=shift;
                   1062:     $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
                   1063:     return $str;
                   1064: }
                   1065: 
                   1066: # ----------------------------------------------------- Un-Escape Special Chars
                   1067: 
                   1068: sub unescape {
                   1069:     my $str=shift;
                   1070:     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
                   1071:     return $str;
                   1072: }
                   1073: 
1.1       albertel 1074: # ----------------------------------------------------------- Send USR1 to lonc
                   1075: 
                   1076: sub reconlonc {
                   1077:     my $peerfile=shift;
                   1078:     &logthis("Trying to reconnect for $peerfile");
                   1079:     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
                   1080:     if (my $fh=IO::File->new("$loncfile")) {
                   1081: 	my $loncpid=<$fh>;
                   1082:         chomp($loncpid);
                   1083:         if (kill 0 => $loncpid) {
                   1084: 	    &logthis("lonc at pid $loncpid responding, sending USR1");
                   1085:             kill USR1 => $loncpid;
                   1086:         } else {
1.9       www      1087: 	    &logthis(
                   1088:               "<font color=red>CRITICAL: "
                   1089:              ."lonc at pid $loncpid not responding, giving up</font>");
1.1       albertel 1090:         }
                   1091:     } else {
1.9       www      1092:       &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1       albertel 1093:     }
                   1094: }
                   1095: 
                   1096: # -------------------------------------------------- Non-critical communication
1.11      www      1097: 
1.1       albertel 1098: sub subreply {
                   1099:     my ($cmd,$server)=@_;
                   1100:     my $peerfile="$perlvar{'lonSockDir'}/$server";
                   1101:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                   1102:                                       Type    => SOCK_STREAM,
                   1103:                                       Timeout => 10)
                   1104:        or return "con_lost";
                   1105:     print $sclient "$cmd\n";
                   1106:     my $answer=<$sclient>;
                   1107:     chomp($answer);
                   1108:     if (!$answer) { $answer="con_lost"; }
                   1109:     return $answer;
                   1110: }
                   1111: 
                   1112: sub reply {
                   1113:   my ($cmd,$server)=@_;
                   1114:   my $answer;
1.115     albertel 1115:   if ($server ne $currenthostid) { 
1.1       albertel 1116:     $answer=subreply($cmd,$server);
                   1117:     if ($answer eq 'con_lost') {
                   1118: 	$answer=subreply("ping",$server);
                   1119:         if ($answer ne $server) {
1.115     albertel 1120: 	    &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1       albertel 1121:            &reconlonc("$perlvar{'lonSockDir'}/$server");
                   1122:         }
                   1123:         $answer=subreply($cmd,$server);
                   1124:     }
                   1125:   } else {
                   1126:     $answer='self_reply';
                   1127:   } 
                   1128:   return $answer;
                   1129: }
                   1130: 
1.13      www      1131: # -------------------------------------------------------------- Talk to lonsql
                   1132: 
1.12      harris41 1133: sub sqlreply {
                   1134:     my ($cmd)=@_;
                   1135:     my $answer=subsqlreply($cmd);
                   1136:     if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
                   1137:     return $answer;
                   1138: }
                   1139: 
                   1140: sub subsqlreply {
                   1141:     my ($cmd)=@_;
                   1142:     my $unixsock="mysqlsock";
                   1143:     my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
                   1144:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                   1145:                                       Type    => SOCK_STREAM,
                   1146:                                       Timeout => 10)
                   1147:        or return "con_lost";
                   1148:     print $sclient "$cmd\n";
                   1149:     my $answer=<$sclient>;
                   1150:     chomp($answer);
                   1151:     if (!$answer) { $answer="con_lost"; }
                   1152:     return $answer;
                   1153: }
                   1154: 
1.1       albertel 1155: # -------------------------------------------- Return path to profile directory
1.11      www      1156: 
1.1       albertel 1157: sub propath {
                   1158:     my ($udom,$uname)=@_;
                   1159:     $udom=~s/\W//g;
                   1160:     $uname=~s/\W//g;
1.16      www      1161:     my $subdir=$uname.'__';
1.1       albertel 1162:     $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
                   1163:     my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
                   1164:     return $proname;
                   1165: } 
                   1166: 
                   1167: # --------------------------------------- Is this the home server of an author?
1.11      www      1168: 
1.1       albertel 1169: sub ishome {
                   1170:     my $author=shift;
                   1171:     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
                   1172:     my ($udom,$uname)=split(/\//,$author);
                   1173:     my $proname=propath($udom,$uname);
                   1174:     if (-e $proname) {
                   1175: 	return 'owner';
                   1176:     } else {
                   1177:         return 'not_owner';
                   1178:     }
                   1179: }
                   1180: 
                   1181: # ======================================================= Continue main program
                   1182: # ---------------------------------------------------- Fork once and dissociate
                   1183: 
1.134     albertel 1184: my $fpid=fork;
1.1       albertel 1185: exit if $fpid;
1.29      harris41 1186: die "Couldn't fork: $!" unless defined ($fpid);
1.1       albertel 1187: 
1.29      harris41 1188: POSIX::setsid() or die "Can't start new session: $!";
1.1       albertel 1189: 
                   1190: # ------------------------------------------------------- Write our PID on disk
                   1191: 
1.134     albertel 1192: my $execdir=$perlvar{'lonDaemons'};
1.1       albertel 1193: open (PIDSAVE,">$execdir/logs/lond.pid");
                   1194: print PIDSAVE "$$\n";
                   1195: close(PIDSAVE);
1.9       www      1196: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57      www      1197: &status('Starting');
1.1       albertel 1198: 
1.106     foxr     1199: 
1.1       albertel 1200: 
                   1201: # ----------------------------------------------------- Install signal handlers
                   1202: 
1.57      www      1203: 
1.1       albertel 1204: $SIG{CHLD} = \&REAPER;
                   1205: $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                   1206: $SIG{HUP}  = \&HUPSMAN;
1.57      www      1207: $SIG{USR1} = \&checkchildren;
1.144     foxr     1208: $SIG{USR2} = \&UpdateHosts;
1.106     foxr     1209: 
1.148     foxr     1210: #  Read the host hashes:
                   1211: 
                   1212: ReadHostTable;
1.106     foxr     1213: 
                   1214: # --------------------------------------------------------------
                   1215: #   Accept connections.  When a connection comes in, it is validated
                   1216: #   and if good, a child process is created to process transactions
                   1217: #   along the connection.
                   1218: 
1.1       albertel 1219: while (1) {
1.165     albertel 1220:     &status('Starting accept');
1.106     foxr     1221:     $client = $server->accept() or next;
1.165     albertel 1222:     &status('Accepted '.$client.' off to spawn');
1.106     foxr     1223:     make_new_child($client);
1.165     albertel 1224:     &status('Finished spawning');
1.1       albertel 1225: }
                   1226: 
                   1227: sub make_new_child {
                   1228:     my $pid;
                   1229:     my $cipher;
                   1230:     my $sigset;
1.106     foxr     1231: 
                   1232:     $client = shift;
1.165     albertel 1233:     &status('Starting new child '.$client);
1.161     foxr     1234:     &logthis('<font color="green"> Attempting to start child ('.$client.
                   1235: 	     ")</font>");    
1.1       albertel 1236:     # block signal for fork
                   1237:     $sigset = POSIX::SigSet->new(SIGINT);
                   1238:     sigprocmask(SIG_BLOCK, $sigset)
1.29      harris41 1239:         or die "Can't block SIGINT for fork: $!\n";
1.134     albertel 1240: 
1.29      harris41 1241:     die "fork: $!" unless defined ($pid = fork);
1.148     foxr     1242: 
                   1243:     $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
                   1244: 	                               # connection liveness.
                   1245: 
                   1246:     #
                   1247:     #  Figure out who we're talking to so we can record the peer in 
                   1248:     #  the pid hash.
                   1249:     #
                   1250:     my $caller = getpeername($client);
                   1251:     my ($port,$iaddr)=unpack_sockaddr_in($caller);
                   1252:     $clientip=inet_ntoa($iaddr);
1.1       albertel 1253:     
                   1254:     if ($pid) {
                   1255:         # Parent records the child's birth and returns.
                   1256:         sigprocmask(SIG_UNBLOCK, $sigset)
1.29      harris41 1257:             or die "Can't unblock SIGINT for fork: $!\n";
1.148     foxr     1258:         $children{$pid} = $clientip;
1.1       albertel 1259:         $children++;
1.57      www      1260:         &status('Started child '.$pid);
1.1       albertel 1261:         return;
                   1262:     } else {
                   1263:         # Child can *not* return from this subroutine.
                   1264:         $SIG{INT} = 'DEFAULT';      # make SIGINT kill us as it did before
1.126     albertel 1265:         $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns 
                   1266:                                 #don't get intercepted
1.57      www      1267:         $SIG{USR1}= \&logstatus;
1.63      www      1268:         $SIG{ALRM}= \&timeout;
1.57      www      1269:         $lastlog='Forked ';
                   1270:         $status='Forked';
                   1271: 
1.1       albertel 1272:         # unblock signals
                   1273:         sigprocmask(SIG_UNBLOCK, $sigset)
1.29      harris41 1274:             or die "Can't unblock SIGINT for fork: $!\n";
1.13      www      1275: 
1.134     albertel 1276:         my $tmpsnum=0;
1.91      albertel 1277: #---------------------------------------------------- kerberos 5 initialization
                   1278:         &Authen::Krb5::init_context();
                   1279:         &Authen::Krb5::init_ets();
                   1280: 
1.161     foxr     1281: 	&status('Accepted connection');
1.1       albertel 1282: # =============================================================================
                   1283:             # do something with the connection
                   1284: # -----------------------------------------------------------------------------
1.148     foxr     1285: 	# see if we know client and check for spoof IP by challenge
                   1286: 
1.161     foxr     1287: 	ReadManagerTable;	# May also be a manager!!
                   1288: 	
                   1289: 	my $clientrec=($hostid{$clientip}     ne undef);
                   1290: 	my $ismanager=($managers{$clientip}    ne undef);
                   1291: 	$clientname  = "[unknonwn]";
                   1292: 	if($clientrec) {	# Establish client type.
                   1293: 	    $ConnectionType = "client";
                   1294: 	    $clientname = $hostid{$clientip};
                   1295: 	    if($ismanager) {
                   1296: 		$ConnectionType = "both";
                   1297: 	    }
                   1298: 	} else {
                   1299: 	    $ConnectionType = "manager";
                   1300: 	    $clientname = $managers{$clientip};
                   1301: 	}
                   1302: 	my $clientok;
                   1303: 	if ($clientrec || $ismanager) {
                   1304: 	    &status("Waiting for init from $clientip $clientname");
                   1305: 	    &logthis('<font color="yellow">INFO: Connection, '.
                   1306: 		     $clientip.
                   1307: 		  " ($clientname) connection type = $ConnectionType </font>" );
                   1308: 	    &status("Connecting $clientip  ($clientname))"); 
                   1309: 	    my $remotereq=<$client>;
                   1310: 	    $remotereq=~s/[^\w:]//g;
                   1311: 	    if ($remotereq =~ /^init/) {
                   1312: 		&sethost("sethost:$perlvar{'lonHostID'}");
                   1313: 		my $challenge="$$".time;
                   1314: 		print $client "$challenge\n";
                   1315: 		&status(
                   1316: 			"Waiting for challenge reply from $clientip ($clientname)"); 
                   1317: 		$remotereq=<$client>;
                   1318: 		$remotereq=~s/\W//g;
                   1319: 		if ($challenge eq $remotereq) {
                   1320: 		    $clientok=1;
                   1321: 		    print $client "ok\n";
                   1322: 		} else {
                   1323: 		    &logthis(
                   1324: 			     "<font color=blue>WARNING: $clientip did not reply challenge</font>");
                   1325: 		    &status('No challenge reply '.$clientip);
                   1326: 		}
1.2       www      1327: 	    } else {
1.161     foxr     1328: 		&logthis(
                   1329: 			 "<font color=blue>WARNING: "
                   1330: 			 ."$clientip failed to initialize: >$remotereq< </font>");
                   1331: 		&status('No init '.$clientip);
                   1332: 	    }
                   1333: 	} else {
                   1334: 	    &logthis(
                   1335: 		     "<font color=blue>WARNING: Unknown client $clientip</font>");
                   1336: 	    &status('Hung up on '.$clientip);
                   1337: 	}
                   1338: 	if ($clientok) {
1.1       albertel 1339: # ---------------- New known client connecting, could mean machine online again
1.161     foxr     1340: 	    
                   1341: 	    foreach my $id (keys(%hostip)) {
                   1342: 		if ($hostip{$id} ne $clientip ||
                   1343: 		    $hostip{$currenthostid} eq $clientip) {
                   1344: 		    # no need to try to do recon's to myself
                   1345: 		    next;
1.115     albertel 1346: 		}
1.161     foxr     1347: 		&reconlonc("$perlvar{'lonSockDir'}/$id");
                   1348: 	    }
                   1349: 	    &logthis("<font color=green>Established connection: $clientname</font>");
                   1350: 	    &status('Will listen to '.$clientname);
1.1       albertel 1351: # ------------------------------------------------------------ Process requests
1.161     foxr     1352: 	    while (my $userinput=<$client>) {
1.1       albertel 1353:                 chomp($userinput);
1.79      foxr     1354: 		Debug("Request = $userinput\n");
1.161     foxr     1355:                 &status('Processing '.$clientname.': '.$userinput);
1.1       albertel 1356:                 my $wasenc=0;
1.63      www      1357:                 alarm(120);
1.1       albertel 1358: # ------------------------------------------------------------ See if encrypted
                   1359: 		if ($userinput =~ /^enc/) {
1.161     foxr     1360: 		    if ($cipher) {
                   1361: 			my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
                   1362: 			$userinput='';
                   1363: 			for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
                   1364: 			    $userinput.=
                   1365: 				$cipher->decrypt(
                   1366: 						 pack("H16",substr($encinput,$encidx,16))
                   1367: 						 );
                   1368: 			}
                   1369: 			$userinput=substr($userinput,0,$cmdlength);
                   1370: 			$wasenc=1;
1.1       albertel 1371: 		    }
                   1372: 		}
1.161     foxr     1373: 		
1.1       albertel 1374: # ------------------------------------------------------------- Normal commands
                   1375: # ------------------------------------------------------------------------ ping
1.161     foxr     1376: 		if ($userinput =~ /^ping/) {	# client only
                   1377: 		    if(isClient) {
                   1378: 			print $client "$currenthostid\n";
                   1379: 		    } else {
                   1380: 			Reply($client, "refused\n", $userinput);
                   1381: 		    }
1.1       albertel 1382: # ------------------------------------------------------------------------ pong
1.161     foxr     1383: 		}elsif ($userinput =~ /^pong/) { # client only
                   1384: 		    if(isClient) {
                   1385: 			my $reply=&reply("ping",$clientname);
                   1386: 			print $client "$currenthostid:$reply\n"; 
                   1387: 		    } else {
                   1388: 			Reply($client, "refused\n", $userinput);
                   1389: 		    }
1.1       albertel 1390: # ------------------------------------------------------------------------ ekey
1.161     foxr     1391: 		} elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
                   1392: 		    my $buildkey=time.$$.int(rand 100000);
                   1393: 		    $buildkey=~tr/1-6/A-F/;
                   1394: 		    $buildkey=int(rand 100000).$buildkey.int(rand 100000);
                   1395: 		    my $key=$currenthostid.$clientname;
                   1396: 		    $key=~tr/a-z/A-Z/;
                   1397: 		    $key=~tr/G-P/0-9/;
                   1398: 		    $key=~tr/Q-Z/0-9/;
                   1399: 		    $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
                   1400: 		    $key=substr($key,0,32);
                   1401: 		    my $cipherkey=pack("H32",$key);
                   1402: 		    $cipher=new IDEA $cipherkey;
                   1403: 		    print $client "$buildkey\n"; 
1.1       albertel 1404: # ------------------------------------------------------------------------ load
1.161     foxr     1405: 		} elsif ($userinput =~ /^load/) { # client only
                   1406: 		    if (isClient) {
                   1407: 			my $loadavg;
                   1408: 			{
                   1409: 			    my $loadfile=IO::File->new('/proc/loadavg');
                   1410: 			    $loadavg=<$loadfile>;
                   1411: 			}
                   1412: 			$loadavg =~ s/\s.*//g;
                   1413: 			my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
                   1414: 			print $client "$loadpercent\n";
                   1415: 		    } else {
                   1416: 			Reply($client, "refused\n", $userinput);
                   1417: 	       
                   1418: 		    }
1.127     albertel 1419: # -------------------------------------------------------------------- userload
1.161     foxr     1420: 		} elsif ($userinput =~ /^userload/) { # client only
                   1421: 		    if(isClient) {
                   1422: 			my $userloadpercent=&userload();
                   1423: 			print $client "$userloadpercent\n";
                   1424: 		    } else {
                   1425: 			Reply($client, "refused\n", $userinput);
                   1426: 		     
                   1427: 		    }
1.137     foxr     1428: #
                   1429: #        Transactions requiring encryption:
                   1430: #
1.54      harris41 1431: # ----------------------------------------------------------------- currentauth
1.161     foxr     1432: 		} elsif ($userinput =~ /^currentauth/) {
                   1433: 		    if (($wasenc==1)  && isClient) { # Encoded & client only.
                   1434: 			my ($cmd,$udom,$uname)=split(/:/,$userinput);
                   1435: 			my $result = GetAuthType($udom, $uname);
                   1436: 			if($result eq "nouser") {
                   1437: 			    print $client "unknown_user\n";
                   1438: 			}
                   1439: 			else {
                   1440: 			    print $client "$result\n"
                   1441: 			    }
                   1442: 		    } else {
                   1443: 			Reply($client, "refused\n", $userinput);
                   1444: 			
                   1445: 		    }
1.137     foxr     1446: #--------------------------------------------------------------------- pushfile
1.161     foxr     1447: 		} elsif($userinput =~ /^pushfile/) {	# encoded & manager.
                   1448: 		    if(($wasenc == 1) && isManager) {
                   1449: 			my $cert = GetCertificate($userinput);
                   1450: 			if(ValidManager($cert)) {
                   1451: 			    my $reply = PushFile($userinput);
                   1452: 			    print $client "$reply\n";
                   1453: 			} else {
                   1454: 			    print $client "refused\n";
                   1455: 			} 
                   1456: 		    } else {
                   1457: 			Reply($client, "refused\n", $userinput);
                   1458: 			
                   1459: 		    }
1.137     foxr     1460: #--------------------------------------------------------------------- reinit
1.161     foxr     1461: 		} elsif($userinput =~ /^reinit/) { # Encoded and manager
1.166     foxr     1462: 			if (($wasenc == 1) && isManager) {
                   1463: 				my $cert = GetCertificate($userinput);
                   1464: 				if(ValidManager($cert)) {
                   1465: 					chomp($userinput);
                   1466: 					my $reply = ReinitProcess($userinput);
                   1467: 					print $client  "$reply\n";
                   1468: 				} else {
                   1469: 					 print $client "refused\n";
                   1470: 				}
1.161     foxr     1471: 			} else {
1.166     foxr     1472: 				Reply($client, "refused\n", $userinput);
1.161     foxr     1473: 			}
1.166     foxr     1474: #------------------------------------------------------------------------- edit
                   1475: 		    } elsif ($userinput =~ /^edit/) {    # encoded and manager:
                   1476: 			if(($wasenc ==1) && (isManager)) {
                   1477: 			    my $cert = GetCertificate($userinput);
                   1478: 			    if(ValidManager($cert)) {
                   1479:                my($command, $filetype, $script) = split(/:/, $userinput);
                   1480:                if (($filetype eq "hosts") || ($filetype eq "domain")) {
                   1481:                   if($script ne "") {
1.167     foxr     1482: 		      Reply($client, EditFile($userinput));
1.166     foxr     1483:                   } else {
                   1484:                      Reply($client,"refused\n",$userinput);
                   1485:                   }
                   1486:                } else {
                   1487:                   Reply($client,"refused\n",$userinput);
                   1488:                }
                   1489:             } else {
                   1490:                Reply($client,"refused\n",$userinput);
                   1491:             }
                   1492:          } else {
                   1493: 	     Reply($client,"refused\n",$userinput);
                   1494: 	 }
1.1       albertel 1495: # ------------------------------------------------------------------------ auth
1.166     foxr     1496: 		    } elsif ($userinput =~ /^auth/) { # Encoded and client only.
1.161     foxr     1497: 		    if (($wasenc==1) && isClient) {
                   1498: 			my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
                   1499: 			chomp($upass);
                   1500: 			$upass=unescape($upass);
                   1501: 			my $proname=propath($udom,$uname);
                   1502: 			my $passfilename="$proname/passwd";
                   1503: 			if (-e $passfilename) {
                   1504: 			    my $pf = IO::File->new($passfilename);
                   1505: 			    my $realpasswd=<$pf>;
                   1506: 			    chomp($realpasswd);
                   1507: 			    my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
                   1508: 			    my $pwdcorrect=0;
                   1509: 			    if ($howpwd eq 'internal') {
                   1510: 				&Debug("Internal auth");
                   1511: 				$pwdcorrect=
                   1512: 				    (crypt($upass,$contentpwd) eq $contentpwd);
                   1513: 			    } elsif ($howpwd eq 'unix') {
                   1514: 				&Debug("Unix auth");
                   1515: 				if((getpwnam($uname))[1] eq "") { #no such user!
                   1516: 				    $pwdcorrect = 0;
                   1517: 				} else {
                   1518: 				    $contentpwd=(getpwnam($uname))[1];
                   1519: 				    my $pwauth_path="/usr/local/sbin/pwauth";
                   1520: 				    unless ($contentpwd eq 'x') {
                   1521: 					$pwdcorrect=
                   1522: 					    (crypt($upass,$contentpwd) eq 
                   1523: 					     $contentpwd);
                   1524: 				    }
                   1525: 				    
                   1526: 				    elsif (-e $pwauth_path) {
                   1527: 					open PWAUTH, "|$pwauth_path" or
                   1528: 					    die "Cannot invoke authentication";
                   1529: 					print PWAUTH "$uname\n$upass\n";
                   1530: 					close PWAUTH;
                   1531: 					$pwdcorrect=!$?;
                   1532: 				    }
                   1533: 				}
                   1534: 			    } elsif ($howpwd eq 'krb4') {
                   1535: 				my $null=pack("C",0);
                   1536: 				unless ($upass=~/$null/) {
                   1537: 				    my $krb4_error = &Authen::Krb4::get_pw_in_tkt
                   1538: 					($uname,"",$contentpwd,'krbtgt',
                   1539: 					 $contentpwd,1,$upass);
                   1540: 				    if (!$krb4_error) {
                   1541: 					$pwdcorrect = 1;
                   1542: 				    } else { 
                   1543: 					$pwdcorrect=0; 
                   1544: 					# log error if it is not a bad password
                   1545: 					if ($krb4_error != 62) {
                   1546: 					    &logthis('krb4:'.$uname.','.$contentpwd.','.
                   1547: 						     &Authen::Krb4::get_err_txt($Authen::Krb4::error));
                   1548: 					}
                   1549: 				    }
                   1550: 				}
                   1551: 			    } elsif ($howpwd eq 'krb5') {
                   1552: 				my $null=pack("C",0);
                   1553: 				unless ($upass=~/$null/) {
                   1554: 				    my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
                   1555: 				    my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
                   1556: 				    my $krbserver=&Authen::Krb5::parse_name($krbservice);
                   1557: 				    my $credentials=&Authen::Krb5::cc_default();
                   1558: 				    $credentials->initialize($krbclient);
                   1559: 				    my $krbreturn = 
                   1560: 					&Authen::Krb5::get_in_tkt_with_password(
                   1561: 										$krbclient,$krbserver,$upass,$credentials);
1.92      albertel 1562: #				  unless ($krbreturn) {
                   1563: #				      &logthis("Krb5 Error: ".
                   1564: #					       &Authen::Krb5::error());
                   1565: #				  }
1.161     foxr     1566: 				    $pwdcorrect = ($krbreturn == 1);
                   1567: 				} else { $pwdcorrect=0; }
                   1568: 			    } elsif ($howpwd eq 'localauth') {
                   1569: 				$pwdcorrect=&localauth::localauth($uname,$upass,
                   1570: 								  $contentpwd);
                   1571: 			    }
                   1572: 			    if ($pwdcorrect) {
                   1573: 				print $client "authorized\n";
                   1574: 			    } else {
                   1575: 				print $client "non_authorized\n";
                   1576: 			    }  
                   1577: 			} else {
                   1578: 			    print $client "unknown_user\n";
                   1579: 			}
                   1580: 		    } else {
                   1581: 			Reply($client, "refused\n", $userinput);
                   1582: 		       
                   1583: 		    }
1.1       albertel 1584: # ---------------------------------------------------------------------- passwd
1.161     foxr     1585: 		} elsif ($userinput =~ /^passwd/) { # encoded and client
                   1586: 		    if (($wasenc==1) && isClient) {
                   1587: 			my 
                   1588: 			    ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
                   1589: 			chomp($npass);
                   1590: 			$upass=&unescape($upass);
                   1591: 			$npass=&unescape($npass);
                   1592: 			&Debug("Trying to change password for $uname");
                   1593: 			my $proname=propath($udom,$uname);
                   1594: 			my $passfilename="$proname/passwd";
                   1595: 			if (-e $passfilename) {
                   1596: 			    my $realpasswd;
                   1597: 			    { my $pf = IO::File->new($passfilename);
                   1598: 			      $realpasswd=<$pf>; }
                   1599: 			    chomp($realpasswd);
                   1600: 			    my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
                   1601: 			    if ($howpwd eq 'internal') {
                   1602: 				&Debug("internal auth");
                   1603: 				if (crypt($upass,$contentpwd) eq $contentpwd) {
                   1604: 				    my $salt=time;
                   1605: 				    $salt=substr($salt,6,2);
                   1606: 				    my $ncpass=crypt($npass,$salt);
                   1607: 				    {
                   1608: 					my $pf;
                   1609: 					if ($pf = IO::File->new(">$passfilename")) {
                   1610: 					    print $pf "internal:$ncpass\n";
                   1611: 					    &logthis("Result of password change for $uname: pwchange_success");
                   1612: 					    print $client "ok\n";
                   1613: 					} else {
                   1614: 					    &logthis("Unable to open $uname passwd to change password");
                   1615: 					    print $client "non_authorized\n";
                   1616: 					}
                   1617: 				    }             
                   1618: 				    
                   1619: 				} else {
                   1620: 				    print $client "non_authorized\n";
                   1621: 				}
                   1622: 			    } elsif ($howpwd eq 'unix') {
                   1623: 				# Unix means we have to access /etc/password
                   1624: 				# one way or another.
                   1625: 				# First: Make sure the current password is
                   1626: 				#        correct
                   1627: 				&Debug("auth is unix");
                   1628: 				$contentpwd=(getpwnam($uname))[1];
                   1629: 				my $pwdcorrect = "0";
                   1630: 				my $pwauth_path="/usr/local/sbin/pwauth";
                   1631: 				unless ($contentpwd eq 'x') {
                   1632: 				    $pwdcorrect=
                   1633: 					(crypt($upass,$contentpwd) eq $contentpwd);
                   1634: 				} elsif (-e $pwauth_path) {
                   1635: 				    open PWAUTH, "|$pwauth_path" or
                   1636: 					die "Cannot invoke authentication";
                   1637: 				    print PWAUTH "$uname\n$upass\n";
                   1638: 				    close PWAUTH;
                   1639: 				    &Debug("exited pwauth with $? ($uname,$upass) ");
                   1640: 				    $pwdcorrect=($? == 0);
                   1641: 				}
                   1642: 				if ($pwdcorrect) {
                   1643: 				    my $execdir=$perlvar{'lonDaemons'};
                   1644: 				    &Debug("Opening lcpasswd pipeline");
                   1645: 				    my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
                   1646: 				    print $pf "$uname\n$npass\n$npass\n";
                   1647: 				    close $pf;
                   1648: 				    my $err = $?;
                   1649: 				    my $result = ($err>0 ? 'pwchange_failure' 
                   1650: 						  : 'ok');
                   1651: 				    &logthis("Result of password change for $uname: ".
                   1652: 					     &lcpasswdstrerror($?));
                   1653: 				    print $client "$result\n";
                   1654: 				} else {
                   1655: 				    print $client "non_authorized\n";
                   1656: 				}
                   1657: 			    } else {
                   1658: 				print $client "auth_mode_error\n";
                   1659: 			    }  
                   1660: 			} else {
                   1661: 			    print $client "unknown_user\n";
                   1662: 			}
                   1663: 		    } else {
                   1664: 			Reply($client, "refused\n", $userinput);
                   1665: 		       
                   1666: 		    }
1.31      www      1667: # -------------------------------------------------------------------- makeuser
1.161     foxr     1668: 		} elsif ($userinput =~ /^makeuser/) { # encoded and client.
                   1669: 		    &Debug("Make user received");
                   1670: 		    my $oldumask=umask(0077);
                   1671: 		    if (($wasenc==1) && isClient) {
                   1672: 			my 
                   1673: 			    ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
                   1674: 			&Debug("cmd =".$cmd." $udom =".$udom.
                   1675: 			       " uname=".$uname);
                   1676: 			chomp($npass);
                   1677: 			$npass=&unescape($npass);
                   1678: 			my $proname=propath($udom,$uname);
                   1679: 			my $passfilename="$proname/passwd";
                   1680: 			&Debug("Password file created will be:".
                   1681: 			       $passfilename);
                   1682: 			if (-e $passfilename) {
                   1683: 			    print $client "already_exists\n";
                   1684: 			} elsif ($udom ne $currentdomainid) {
                   1685: 			    print $client "not_right_domain\n";
                   1686: 			} else {
                   1687: 			    my @fpparts=split(/\//,$proname);
                   1688: 			    my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
                   1689: 			    my $fperror='';
                   1690: 			    for (my $i=3;$i<=$#fpparts;$i++) {
                   1691: 				$fpnow.='/'.$fpparts[$i]; 
                   1692: 				unless (-e $fpnow) {
                   1693: 				    unless (mkdir($fpnow,0777)) {
                   1694: 					$fperror="error: ".($!+0)
                   1695: 					    ." mkdir failed while attempting "
1.171     albertel 1696: 					    ."makeuser";
1.161     foxr     1697: 				    }
                   1698: 				}
                   1699: 			    }
                   1700: 			    unless ($fperror) {
                   1701: 				my $result=&make_passwd_file($uname, $umode,$npass,
                   1702: 							     $passfilename);
                   1703: 				print $client $result;
                   1704: 			    } else {
                   1705: 				print $client "$fperror\n";
                   1706: 			    }
                   1707: 			}
                   1708: 		    } else {
                   1709: 			Reply($client, "refused\n", $userinput);
                   1710: 	      
                   1711: 		    }
                   1712: 		    umask($oldumask);
1.55      harris41 1713: # -------------------------------------------------------------- changeuserauth
1.161     foxr     1714: 		} elsif ($userinput =~ /^changeuserauth/) { # encoded & client
                   1715: 		    &Debug("Changing authorization");
                   1716: 		    if (($wasenc==1) && isClient) {
                   1717: 			my 
                   1718: 			    ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
                   1719: 			chomp($npass);
                   1720: 			&Debug("cmd = ".$cmd." domain= ".$udom.
                   1721: 			       "uname =".$uname." umode= ".$umode);
                   1722: 			$npass=&unescape($npass);
                   1723: 			my $proname=&propath($udom,$uname);
                   1724: 			my $passfilename="$proname/passwd";
                   1725: 			if ($udom ne $currentdomainid) {
                   1726: 			    print $client "not_right_domain\n";
                   1727: 			} else {
                   1728: 			    my $result=&make_passwd_file($uname, $umode,$npass,
                   1729: 							 $passfilename);
                   1730: 			    print $client $result;
                   1731: 			}
                   1732: 		    } else {
                   1733: 			Reply($client, "refused\n", $userinput);
                   1734: 		   
                   1735: 		    }
1.1       albertel 1736: # ------------------------------------------------------------------------ home
1.161     foxr     1737: 		} elsif ($userinput =~ /^home/) { # client clear or encoded
                   1738: 		    if(isClient) {
                   1739: 			my ($cmd,$udom,$uname)=split(/:/,$userinput);
                   1740: 			chomp($uname);
                   1741: 			my $proname=propath($udom,$uname);
                   1742: 			if (-e $proname) {
                   1743: 			    print $client "found\n";
                   1744: 			} else {
                   1745: 			    print $client "not_found\n";
                   1746: 			}
                   1747: 		    } else {
                   1748: 			Reply($client, "refused\n", $userinput);
                   1749: 
                   1750: 		    }
1.1       albertel 1751: # ---------------------------------------------------------------------- update
1.161     foxr     1752: 		} elsif ($userinput =~ /^update/) { # client clear or encoded.
                   1753: 		    if(isClient) {
                   1754: 			my ($cmd,$fname)=split(/:/,$userinput);
                   1755: 			my $ownership=ishome($fname);
                   1756: 			if ($ownership eq 'not_owner') {
                   1757: 			    if (-e $fname) {
                   1758: 				my ($dev,$ino,$mode,$nlink,
                   1759: 				    $uid,$gid,$rdev,$size,
                   1760: 				    $atime,$mtime,$ctime,
                   1761: 				    $blksize,$blocks)=stat($fname);
                   1762: 				my $now=time;
                   1763: 				my $since=$now-$atime;
                   1764: 				if ($since>$perlvar{'lonExpire'}) {
                   1765: 				    my $reply=
                   1766: 					&reply("unsub:$fname","$clientname");
                   1767: 				    unlink("$fname");
                   1768: 				} else {
                   1769: 				    my $transname="$fname.in.transfer";
                   1770: 				    my $remoteurl=
                   1771: 					&reply("sub:$fname","$clientname");
                   1772: 				    my $response;
                   1773: 				    {
                   1774: 					my $ua=new LWP::UserAgent;
                   1775: 					my $request=new HTTP::Request('GET',"$remoteurl");
                   1776: 					$response=$ua->request($request,$transname);
                   1777: 				    }
                   1778: 				    if ($response->is_error()) {
                   1779: 					unlink($transname);
                   1780: 					my $message=$response->status_line;
                   1781: 					&logthis(
                   1782: 						 "LWP GET: $message for $fname ($remoteurl)");
                   1783: 				    } else {
                   1784: 					if ($remoteurl!~/\.meta$/) {
                   1785: 					    my $ua=new LWP::UserAgent;
                   1786: 					    my $mrequest=
                   1787: 						new HTTP::Request('GET',$remoteurl.'.meta');
                   1788: 					    my $mresponse=
                   1789: 						$ua->request($mrequest,$fname.'.meta');
                   1790: 					    if ($mresponse->is_error()) {
                   1791: 						unlink($fname.'.meta');
                   1792: 					    }
                   1793: 					}
                   1794: 					rename($transname,$fname);
                   1795: 				    }
                   1796: 				}
                   1797: 				print $client "ok\n";
                   1798: 			    } else {
                   1799: 				print $client "not_found\n";
                   1800: 			    }
                   1801: 			} else {
                   1802: 			    print $client "rejected\n";
                   1803: 			}
                   1804: 		    } else {
                   1805: 			Reply($client, "refused\n", $userinput);
                   1806: 
                   1807: 		    }
1.85      www      1808: # -------------------------------------- fetch a user file from a remote server
1.161     foxr     1809: 		} elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
                   1810: 		    if(isClient) {
                   1811: 			my ($cmd,$fname)=split(/:/,$userinput);
                   1812: 			my ($udom,$uname,$ufile)=split(/\//,$fname);
                   1813: 			my $udir=propath($udom,$uname).'/userfiles';
                   1814: 			unless (-e $udir) { mkdir($udir,0770); }
                   1815: 			if (-e $udir) {
                   1816: 			    $ufile=~s/^[\.\~]+//;
                   1817: 			    $ufile=~s/\///g;
                   1818: 			    my $destname=$udir.'/'.$ufile;
                   1819: 			    my $transname=$udir.'/'.$ufile.'.in.transit';
                   1820: 			    my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
                   1821: 			    my $response;
                   1822: 			    {
                   1823: 				my $ua=new LWP::UserAgent;
                   1824: 				my $request=new HTTP::Request('GET',"$remoteurl");
                   1825: 				$response=$ua->request($request,$transname);
                   1826: 			    }
                   1827: 			    if ($response->is_error()) {
                   1828: 				unlink($transname);
                   1829: 				my $message=$response->status_line;
                   1830: 				&logthis("LWP GET: $message for $fname ($remoteurl)");
                   1831: 				print $client "failed\n";
                   1832: 			    } else {
                   1833: 				if (!rename($transname,$destname)) {
                   1834: 				    &logthis("Unable to move $transname to $destname");
                   1835: 				    unlink($transname);
                   1836: 				    print $client "failed\n";
                   1837: 				} else {
                   1838: 				    print $client "ok\n";
                   1839: 				}
                   1840: 			    }
                   1841: 			} else {
                   1842: 			    print $client "not_home\n";
                   1843: 			}
                   1844: 		    } else {
                   1845: 			Reply($client, "refused\n", $userinput);
                   1846: 
                   1847: 		    }
1.85      www      1848: # ------------------------------------------ authenticate access to a user file
1.161     foxr     1849: 		} elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
                   1850: 		    if(isClient) {
                   1851: 			my ($cmd,$fname,$session)=split(/:/,$userinput);
                   1852: 			chomp($session);
                   1853: 			my $reply='non_auth';
                   1854: 			if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
                   1855: 				 $session.'.id')) {
                   1856: 			    while (my $line=<ENVIN>) {
                   1857: 				if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
                   1858: 			    }
                   1859: 			    close(ENVIN);
                   1860: 			    print $client $reply."\n";
                   1861: 			} else {
                   1862: 			    print $client "invalid_token\n";
                   1863: 			}
                   1864: 		    } else {
                   1865: 			Reply($client, "refused\n", $userinput);
                   1866: 
                   1867: 		    }
1.1       albertel 1868: # ----------------------------------------------------------------- unsubscribe
1.161     foxr     1869: 		} elsif ($userinput =~ /^unsub/) {
                   1870: 		    if(isClient) {
                   1871: 			my ($cmd,$fname)=split(/:/,$userinput);
                   1872: 			if (-e $fname) {
                   1873: 			    print $client &unsub($client,$fname,$clientip);
                   1874: 			} else {
                   1875: 			    print $client "not_found\n";
                   1876: 			}
                   1877: 		    } else {
                   1878: 			Reply($client, "refused\n", $userinput);
                   1879: 
                   1880: 		    }
1.1       albertel 1881: # ------------------------------------------------------------------- subscribe
1.161     foxr     1882: 		} elsif ($userinput =~ /^sub/) {
                   1883: 		    if(isClient) {
                   1884: 			print $client &subscribe($userinput,$clientip);
                   1885: 		    } else {
                   1886: 			Reply($client, "refused\n", $userinput);
                   1887: 
                   1888: 		    }
1.102     www      1889: # ------------------------------------------------------------- current version
1.161     foxr     1890: 		} elsif ($userinput =~ /^currentversion/) {
                   1891: 		    if(isClient) {
                   1892: 			my ($cmd,$fname)=split(/:/,$userinput);
                   1893: 			print $client &currentversion($fname)."\n";
                   1894: 		    } else {
                   1895: 			Reply($client, "refused\n", $userinput);
                   1896: 
                   1897: 		    }
1.12      harris41 1898: # ------------------------------------------------------------------------- log
1.161     foxr     1899: 		} elsif ($userinput =~ /^log/) {
                   1900: 		    if(isClient) {
                   1901: 			my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
                   1902: 			chomp($what);
                   1903: 			my $proname=propath($udom,$uname);
                   1904: 			my $now=time;
                   1905: 			{
                   1906: 			    my $hfh;
                   1907: 			    if ($hfh=IO::File->new(">>$proname/activity.log")) { 
                   1908: 				print $hfh "$now:$clientname:$what\n";
                   1909: 				print $client "ok\n"; 
                   1910: 			    } else {
                   1911: 				print $client "error: ".($!+0)
                   1912: 				    ." IO::File->new Failed "
                   1913: 				    ."while attempting log\n";
                   1914: 			    }
                   1915: 			}
                   1916: 		    } else {
                   1917: 			Reply($client, "refused\n", $userinput);
                   1918: 
                   1919: 		    }
1.1       albertel 1920: # ------------------------------------------------------------------------- put
1.161     foxr     1921: 		} elsif ($userinput =~ /^put/) {
                   1922: 		    if(isClient) {
                   1923: 			my ($cmd,$udom,$uname,$namespace,$what)
                   1924: 			    =split(/:/,$userinput);
                   1925: 			$namespace=~s/\//\_/g;
                   1926: 			$namespace=~s/\W//g;
                   1927: 			if ($namespace ne 'roles') {
                   1928: 			    chomp($what);
                   1929: 			    my $proname=propath($udom,$uname);
                   1930: 			    my $now=time;
                   1931: 			    unless ($namespace=~/^nohist\_/) {
                   1932: 				my $hfh;
                   1933: 				if (
                   1934: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1935: 				    ) { print $hfh "P:$now:$what\n"; }
                   1936: 			    }
                   1937: 			    my @pairs=split(/\&/,$what);
                   1938: 			    my %hash;
                   1939: 			    if (tie(%hash,'GDBM_File',
                   1940: 				    "$proname/$namespace.db",
                   1941: 				    &GDBM_WRCREAT(),0640)) {
                   1942: 				foreach my $pair (@pairs) {
                   1943: 				    my ($key,$value)=split(/=/,$pair);
                   1944: 				    $hash{$key}=$value;
1.162     matthew  1945: 				}
                   1946: 				if (untie(%hash)) {
                   1947: 				    print $client "ok\n";
                   1948: 				} else {
                   1949: 				    print $client "error: ".($!+0)
                   1950: 					." untie(GDBM) failed ".
                   1951: 					"while attempting put\n";
                   1952: 				}
                   1953: 			    } else {
                   1954: 				print $client "error: ".($!)
                   1955: 				    ." tie(GDBM) Failed ".
                   1956: 				    "while attempting put\n";
                   1957: 			    }
                   1958: 			} else {
                   1959: 			    print $client "refused\n";
                   1960: 			}
                   1961: 		    } else {
                   1962: 			Reply($client, "refused\n", $userinput);
                   1963: 
                   1964: 		    }
                   1965: # ------------------------------------------------------------------- inc
                   1966: 		} elsif ($userinput =~ /^inc:/) {
                   1967: 		    if(isClient) {
                   1968: 			my ($cmd,$udom,$uname,$namespace,$what)
                   1969: 			    =split(/:/,$userinput);
                   1970: 			$namespace=~s/\//\_/g;
                   1971: 			$namespace=~s/\W//g;
                   1972: 			if ($namespace ne 'roles') {
                   1973: 			    chomp($what);
                   1974: 			    my $proname=propath($udom,$uname);
                   1975: 			    my $now=time;
                   1976: 			    unless ($namespace=~/^nohist\_/) {
                   1977: 				my $hfh;
                   1978: 				if (
                   1979: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1980: 				    ) { print $hfh "P:$now:$what\n"; }
                   1981: 			    }
                   1982: 			    my @pairs=split(/\&/,$what);
                   1983: 			    my %hash;
                   1984: 			    if (tie(%hash,'GDBM_File',
                   1985: 				    "$proname/$namespace.db",
                   1986: 				    &GDBM_WRCREAT(),0640)) {
                   1987: 				foreach my $pair (@pairs) {
                   1988: 				    my ($key,$value)=split(/=/,$pair);
                   1989:                                     # We could check that we have a number...
                   1990:                                     if (! defined($value) || $value eq '') {
                   1991:                                         $value = 1;
                   1992:                                     }
                   1993: 				    $hash{$key}+=$value;
1.161     foxr     1994: 				}
                   1995: 				if (untie(%hash)) {
                   1996: 				    print $client "ok\n";
                   1997: 				} else {
                   1998: 				    print $client "error: ".($!+0)
                   1999: 					." untie(GDBM) failed ".
                   2000: 					"while attempting put\n";
                   2001: 				}
                   2002: 			    } else {
                   2003: 				print $client "error: ".($!)
                   2004: 				    ." tie(GDBM) Failed ".
                   2005: 				    "while attempting put\n";
                   2006: 			    }
                   2007: 			} else {
                   2008: 			    print $client "refused\n";
                   2009: 			}
                   2010: 		    } else {
                   2011: 			Reply($client, "refused\n", $userinput);
                   2012: 
                   2013: 		    }
1.6       www      2014: # -------------------------------------------------------------------- rolesput
1.161     foxr     2015: 		} elsif ($userinput =~ /^rolesput/) {
                   2016: 		    if(isClient) {
                   2017: 			&Debug("rolesput");
                   2018: 			if ($wasenc==1) {
                   2019: 			    my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
                   2020: 				=split(/:/,$userinput);
                   2021: 			    &Debug("cmd = ".$cmd." exedom= ".$exedom.
                   2022: 				   "user = ".$exeuser." udom=".$udom.
                   2023: 				   "what = ".$what);
                   2024: 			    my $namespace='roles';
                   2025: 			    chomp($what);
                   2026: 			    my $proname=propath($udom,$uname);
                   2027: 			    my $now=time;
                   2028: 			    {
                   2029: 				my $hfh;
                   2030: 				if (
                   2031: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
                   2032: 				    ) { 
                   2033: 				    print $hfh "P:$now:$exedom:$exeuser:$what\n";
                   2034: 				}
                   2035: 			    }
                   2036: 			    my @pairs=split(/\&/,$what);
                   2037: 			    my %hash;
                   2038: 			    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   2039: 				foreach my $pair (@pairs) {
                   2040: 				    my ($key,$value)=split(/=/,$pair);
                   2041: 				    &ManagePermissions($key, $udom, $uname,
                   2042: 						       &GetAuthType( $udom, 
                   2043: 								     $uname));
                   2044: 				    $hash{$key}=$value;
                   2045: 				}
                   2046: 				if (untie(%hash)) {
                   2047: 				    print $client "ok\n";
                   2048: 				} else {
                   2049: 				    print $client "error: ".($!+0)
                   2050: 					." untie(GDBM) Failed ".
                   2051: 					"while attempting rolesput\n";
                   2052: 				}
                   2053: 			    } else {
                   2054: 				print $client "error: ".($!+0)
                   2055: 				    ." tie(GDBM) Failed ".
                   2056: 				    "while attempting rolesput\n";
                   2057: 			    }
                   2058: 			} else {
                   2059: 			    print $client "refused\n";
                   2060: 			}
                   2061: 		    } else {
                   2062: 			Reply($client, "refused\n", $userinput);
                   2063: 		  
                   2064: 		    }
1.117     www      2065: # -------------------------------------------------------------------- rolesdel
1.161     foxr     2066: 		} elsif ($userinput =~ /^rolesdel/) {
                   2067: 		    if(isClient) {
                   2068: 			&Debug("rolesdel");
                   2069: 			if ($wasenc==1) {
                   2070: 			    my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
                   2071: 				=split(/:/,$userinput);
                   2072: 			    &Debug("cmd = ".$cmd." exedom= ".$exedom.
                   2073: 				   "user = ".$exeuser." udom=".$udom.
                   2074: 				   "what = ".$what);
                   2075: 			    my $namespace='roles';
                   2076: 			    chomp($what);
                   2077: 			    my $proname=propath($udom,$uname);
                   2078: 			    my $now=time;
                   2079: 			    {
                   2080: 				my $hfh;
                   2081: 				if (
                   2082: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
                   2083: 				    ) { 
                   2084: 				    print $hfh "D:$now:$exedom:$exeuser:$what\n";
                   2085: 				}
                   2086: 			    }
                   2087: 			    my @rolekeys=split(/\&/,$what);
                   2088: 			    my %hash;
                   2089: 			    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   2090: 				foreach my $key (@rolekeys) {
                   2091: 				    delete $hash{$key};
                   2092: 				}
                   2093: 				if (untie(%hash)) {
                   2094: 				    print $client "ok\n";
                   2095: 				} else {
                   2096: 				    print $client "error: ".($!+0)
                   2097: 					." untie(GDBM) Failed ".
                   2098: 					"while attempting rolesdel\n";
                   2099: 				}
                   2100: 			    } else {
                   2101: 				print $client "error: ".($!+0)
                   2102: 				    ." tie(GDBM) Failed ".
                   2103: 				    "while attempting rolesdel\n";
                   2104: 			    }
                   2105: 			} else {
                   2106: 			    print $client "refused\n";
                   2107: 			}
                   2108: 		    } else {
                   2109: 			Reply($client, "refused\n", $userinput);
                   2110: 		      
                   2111: 		    }
1.1       albertel 2112: # ------------------------------------------------------------------------- get
1.161     foxr     2113: 		} elsif ($userinput =~ /^get/) {
                   2114: 		    if(isClient) {
                   2115: 			my ($cmd,$udom,$uname,$namespace,$what)
                   2116: 			    =split(/:/,$userinput);
                   2117: 			$namespace=~s/\//\_/g;
                   2118: 			$namespace=~s/\W//g;
                   2119: 			chomp($what);
                   2120: 			my @queries=split(/\&/,$what);
                   2121: 			my $proname=propath($udom,$uname);
                   2122: 			my $qresult='';
                   2123: 			my %hash;
                   2124: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   2125: 			    for (my $i=0;$i<=$#queries;$i++) {
                   2126: 				$qresult.="$hash{$queries[$i]}&";
                   2127: 			    }
                   2128: 			    if (untie(%hash)) {
                   2129: 				$qresult=~s/\&$//;
                   2130: 				print $client "$qresult\n";
                   2131: 			    } else {
                   2132: 				print $client "error: ".($!+0)
                   2133: 				    ." untie(GDBM) Failed ".
                   2134: 				    "while attempting get\n";
                   2135: 			    }
                   2136: 			} else {
                   2137: 			    if ($!+0 == 2) {
                   2138: 				print $client "error:No such file or ".
                   2139: 				    "GDBM reported bad block error\n";
                   2140: 			    } else {
                   2141: 				print $client "error: ".($!+0)
                   2142: 				    ." tie(GDBM) Failed ".
                   2143: 				    "while attempting get\n";
                   2144: 			    }
                   2145: 			}
                   2146: 		    } else {
                   2147: 			Reply($client, "refused\n", $userinput);
                   2148: 		       
                   2149: 		    }
1.1       albertel 2150: # ------------------------------------------------------------------------ eget
1.161     foxr     2151: 		} elsif ($userinput =~ /^eget/) {
                   2152: 		    if (isClient) {
                   2153: 			my ($cmd,$udom,$uname,$namespace,$what)
                   2154: 			    =split(/:/,$userinput);
                   2155: 			$namespace=~s/\//\_/g;
                   2156: 			$namespace=~s/\W//g;
                   2157: 			chomp($what);
                   2158: 			my @queries=split(/\&/,$what);
                   2159: 			my $proname=propath($udom,$uname);
                   2160: 			my $qresult='';
                   2161: 			my %hash;
                   2162: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   2163: 			    for (my $i=0;$i<=$#queries;$i++) {
                   2164: 				$qresult.="$hash{$queries[$i]}&";
                   2165: 			    }
                   2166: 			    if (untie(%hash)) {
                   2167: 				$qresult=~s/\&$//;
                   2168: 				if ($cipher) {
                   2169: 				    my $cmdlength=length($qresult);
                   2170: 				    $qresult.="         ";
                   2171: 				    my $encqresult='';
                   2172: 				    for 
                   2173: 					(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                   2174: 					    $encqresult.=
                   2175: 						unpack("H16",
                   2176: 						       $cipher->encrypt(substr($qresult,$encidx,8)));
                   2177: 					}
                   2178: 				    print $client "enc:$cmdlength:$encqresult\n";
                   2179: 				} else {
                   2180: 				    print $client "error:no_key\n";
                   2181: 				}
                   2182: 			    } else {
                   2183: 				print $client "error: ".($!+0)
                   2184: 				    ." untie(GDBM) Failed ".
                   2185: 				    "while attempting eget\n";
                   2186: 			    }
                   2187: 			} else {
                   2188: 			    print $client "error: ".($!+0)
                   2189: 				." tie(GDBM) Failed ".
                   2190: 				"while attempting eget\n";
                   2191: 			}
                   2192: 		    } else {
                   2193: 			Reply($client, "refused\n", $userinput);
                   2194: 		    
                   2195: 		    }
1.1       albertel 2196: # ------------------------------------------------------------------------- del
1.161     foxr     2197: 		} elsif ($userinput =~ /^del/) {
                   2198: 		    if(isClient) {
                   2199: 			my ($cmd,$udom,$uname,$namespace,$what)
                   2200: 			    =split(/:/,$userinput);
                   2201: 			$namespace=~s/\//\_/g;
                   2202: 			$namespace=~s/\W//g;
                   2203: 			chomp($what);
                   2204: 			my $proname=propath($udom,$uname);
                   2205: 			my $now=time;
                   2206: 			unless ($namespace=~/^nohist\_/) {
                   2207: 			    my $hfh;
                   2208: 			    if (
                   2209: 				$hfh=IO::File->new(">>$proname/$namespace.hist")
                   2210: 				) { print $hfh "D:$now:$what\n"; }
                   2211: 			}
                   2212: 			my @keys=split(/\&/,$what);
                   2213: 			my %hash;
                   2214: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   2215: 			    foreach my $key (@keys) {
1.172   ! www      2216: 				delete($hash{$key});
1.161     foxr     2217: 			    }
                   2218: 			    if (untie(%hash)) {
                   2219: 				print $client "ok\n";
                   2220: 			    } else {
                   2221: 				print $client "error: ".($!+0)
                   2222: 				    ." untie(GDBM) Failed ".
                   2223: 				    "while attempting del\n";
                   2224: 			    }
                   2225: 			} else {
                   2226: 			    print $client "error: ".($!+0)
                   2227: 				." tie(GDBM) Failed ".
                   2228: 				"while attempting del\n";
                   2229: 			}
                   2230: 		    } else {
                   2231: 			Reply($client, "refused\n", $userinput);
                   2232: 			
                   2233: 		    }
1.1       albertel 2234: # ------------------------------------------------------------------------ keys
1.161     foxr     2235: 		} elsif ($userinput =~ /^keys/) {
                   2236: 		    if(isClient) {
                   2237: 			my ($cmd,$udom,$uname,$namespace)
                   2238: 			    =split(/:/,$userinput);
                   2239: 			$namespace=~s/\//\_/g;
                   2240: 			$namespace=~s/\W//g;
                   2241: 			my $proname=propath($udom,$uname);
                   2242: 			my $qresult='';
                   2243: 			my %hash;
                   2244: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   2245: 			    foreach my $key (keys %hash) {
                   2246: 				$qresult.="$key&";
                   2247: 			    }
                   2248: 			    if (untie(%hash)) {
                   2249: 				$qresult=~s/\&$//;
                   2250: 				print $client "$qresult\n";
                   2251: 			    } else {
                   2252: 				print $client "error: ".($!+0)
                   2253: 				    ." untie(GDBM) Failed ".
                   2254: 				    "while attempting keys\n";
                   2255: 			    }
                   2256: 			} else {
                   2257: 			    print $client "error: ".($!+0)
                   2258: 				." tie(GDBM) Failed ".
                   2259: 				"while attempting keys\n";
                   2260: 			}
                   2261: 		    } else {
                   2262: 			Reply($client, "refused\n", $userinput);
                   2263: 		   
                   2264: 		    }
1.105     matthew  2265: # ----------------------------------------------------------------- dumpcurrent
1.161     foxr     2266: 		} elsif ($userinput =~ /^currentdump/) {
                   2267: 		    if (isClient) {
                   2268: 			my ($cmd,$udom,$uname,$namespace)
                   2269: 			    =split(/:/,$userinput);
                   2270: 			$namespace=~s/\//\_/g;
                   2271: 			$namespace=~s/\W//g;
                   2272: 			my $qresult='';
                   2273: 			my $proname=propath($udom,$uname);
                   2274: 			my %hash;
                   2275: 			if (tie(%hash,'GDBM_File',
                   2276: 				"$proname/$namespace.db",
                   2277: 				&GDBM_READER(),0640)) {
                   2278: 			    # Structure of %data:
                   2279: 			    # $data{$symb}->{$parameter}=$value;
                   2280: 			    # $data{$symb}->{'v.'.$parameter}=$version;
                   2281: 			    # since $parameter will be unescaped, we do not
                   2282: 			    # have to worry about silly parameter names...
                   2283: 			    my %data = ();
                   2284: 			    while (my ($key,$value) = each(%hash)) {
                   2285: 				my ($v,$symb,$param) = split(/:/,$key);
                   2286: 				next if ($v eq 'version' || $symb eq 'keys');
                   2287: 				next if (exists($data{$symb}) && 
                   2288: 					 exists($data{$symb}->{$param}) &&
                   2289: 					 $data{$symb}->{'v.'.$param} > $v);
                   2290: 				$data{$symb}->{$param}=$value;
                   2291: 				$data{$symb}->{'v.'.$param}=$v;
                   2292: 			    }
                   2293: 			    if (untie(%hash)) {
                   2294: 				while (my ($symb,$param_hash) = each(%data)) {
                   2295: 				    while(my ($param,$value) = each (%$param_hash)){
                   2296: 					next if ($param =~ /^v\./);
                   2297: 					$qresult.=$symb.':'.$param.'='.$value.'&';
                   2298: 				    }
                   2299: 				}
                   2300: 				chop($qresult);
                   2301: 				print $client "$qresult\n";
                   2302: 			    } else {
                   2303: 				print $client "error: ".($!+0)
                   2304: 				    ." untie(GDBM) Failed ".
                   2305: 				    "while attempting currentdump\n";
                   2306: 			    }
                   2307: 			} else {
                   2308: 			    print $client "error: ".($!+0)
                   2309: 				." tie(GDBM) Failed ".
                   2310: 				"while attempting currentdump\n";
                   2311: 			}
                   2312: 		    } else {
                   2313: 			Reply($client, "refused\n", $userinput);
                   2314: 		    }
1.1       albertel 2315: # ------------------------------------------------------------------------ dump
1.161     foxr     2316: 		} elsif ($userinput =~ /^dump/) {
                   2317: 		    if(isClient) {
                   2318: 			my ($cmd,$udom,$uname,$namespace,$regexp)
                   2319: 			    =split(/:/,$userinput);
                   2320: 			$namespace=~s/\//\_/g;
                   2321: 			$namespace=~s/\W//g;
                   2322: 			if (defined($regexp)) {
                   2323: 			    $regexp=&unescape($regexp);
                   2324: 			} else {
                   2325: 			    $regexp='.';
                   2326: 			}
                   2327: 			my $qresult='';
                   2328: 			my $proname=propath($udom,$uname);
                   2329: 			my %hash;
                   2330: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   2331: 			       study($regexp);
                   2332: 			       while (my ($key,$value) = each(%hash)) {
                   2333: 				   if ($regexp eq '.') {
                   2334: 				       $qresult.=$key.'='.$value.'&';
                   2335: 				   } else {
                   2336: 				       my $unescapeKey = &unescape($key);
                   2337: 				       if (eval('$unescapeKey=~/$regexp/')) {
                   2338: 					   $qresult.="$key=$value&";
                   2339: 				       }
                   2340: 				   }
                   2341: 			       }
                   2342: 			       if (untie(%hash)) {
                   2343: 				   chop($qresult);
                   2344: 				   print $client "$qresult\n";
                   2345: 			       } else {
                   2346: 				   print $client "error: ".($!+0)
                   2347: 				       ." untie(GDBM) Failed ".
1.111     matthew  2348:                                        "while attempting dump\n";
1.161     foxr     2349: 			       }
                   2350: 			   } else {
                   2351: 			       print $client "error: ".($!+0)
                   2352: 				   ." tie(GDBM) Failed ".
                   2353: 				   "while attempting dump\n";
                   2354: 			   }
                   2355: 		    } else {
                   2356: 			Reply($client, "refused\n", $userinput);
                   2357: 		 
                   2358: 		    }
1.7       www      2359: # ----------------------------------------------------------------------- store
1.161     foxr     2360: 		} elsif ($userinput =~ /^store/) {
                   2361: 		    if(isClient) {
                   2362: 			my ($cmd,$udom,$uname,$namespace,$rid,$what)
                   2363: 			    =split(/:/,$userinput);
                   2364: 			$namespace=~s/\//\_/g;
                   2365: 			$namespace=~s/\W//g;
                   2366: 			if ($namespace ne 'roles') {
                   2367: 			    chomp($what);
                   2368: 			    my $proname=propath($udom,$uname);
                   2369: 			    my $now=time;
                   2370: 			    unless ($namespace=~/^nohist\_/) {
                   2371: 				my $hfh;
                   2372: 				if (
                   2373: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
                   2374: 				    ) { print $hfh "P:$now:$rid:$what\n"; }
                   2375: 			    }
                   2376: 			    my @pairs=split(/\&/,$what);
                   2377: 			    my %hash;
                   2378: 			    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   2379: 				my @previouskeys=split(/&/,$hash{"keys:$rid"});
                   2380: 				my $key;
                   2381: 				$hash{"version:$rid"}++;
                   2382: 				my $version=$hash{"version:$rid"};
                   2383: 				my $allkeys=''; 
                   2384: 				foreach my $pair (@pairs) {
                   2385: 				    my ($key,$value)=split(/=/,$pair);
                   2386: 				    $allkeys.=$key.':';
                   2387: 				    $hash{"$version:$rid:$key"}=$value;
                   2388: 				}
                   2389: 				$hash{"$version:$rid:timestamp"}=$now;
                   2390: 				$allkeys.='timestamp';
                   2391: 				$hash{"$version:keys:$rid"}=$allkeys;
                   2392: 				if (untie(%hash)) {
                   2393: 				    print $client "ok\n";
                   2394: 				} else {
                   2395: 				    print $client "error: ".($!+0)
                   2396: 					." untie(GDBM) Failed ".
                   2397: 					"while attempting store\n";
                   2398: 				}
                   2399: 			    } else {
                   2400: 				print $client "error: ".($!+0)
                   2401: 				    ." tie(GDBM) Failed ".
                   2402: 				    "while attempting store\n";
                   2403: 			    }
                   2404: 			} else {
                   2405: 			    print $client "refused\n";
                   2406: 			}
                   2407: 		    } else {
                   2408: 			Reply($client, "refused\n", $userinput);
                   2409: 		     
                   2410: 		    }
1.7       www      2411: # --------------------------------------------------------------------- restore
1.161     foxr     2412: 		} elsif ($userinput =~ /^restore/) {
                   2413: 		    if(isClient) {
                   2414: 			my ($cmd,$udom,$uname,$namespace,$rid)
                   2415: 			    =split(/:/,$userinput);
                   2416: 			$namespace=~s/\//\_/g;
                   2417: 			$namespace=~s/\W//g;
                   2418: 			chomp($rid);
                   2419: 			my $proname=propath($udom,$uname);
                   2420: 			my $qresult='';
                   2421: 			my %hash;
                   2422: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   2423: 			    my $version=$hash{"version:$rid"};
                   2424: 			    $qresult.="version=$version&";
                   2425: 			    my $scope;
                   2426: 			    for ($scope=1;$scope<=$version;$scope++) {
                   2427: 				my $vkeys=$hash{"$scope:keys:$rid"};
                   2428: 				my @keys=split(/:/,$vkeys);
                   2429: 				my $key;
                   2430: 				$qresult.="$scope:keys=$vkeys&";
                   2431: 				foreach $key (@keys) {
                   2432: 				    $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
                   2433: 				}                                  
                   2434: 			    }
                   2435: 			    if (untie(%hash)) {
                   2436: 				$qresult=~s/\&$//;
                   2437: 				print $client "$qresult\n";
                   2438: 			    } else {
                   2439: 				print $client "error: ".($!+0)
                   2440: 				    ." untie(GDBM) Failed ".
                   2441: 				    "while attempting restore\n";
                   2442: 			    }
                   2443: 			} else {
                   2444: 			    print $client "error: ".($!+0)
                   2445: 				." tie(GDBM) Failed ".
                   2446: 				"while attempting restore\n";
                   2447: 			}
                   2448: 		    } else  {
                   2449: 			Reply($client, "refused\n", $userinput);
                   2450: 		       
                   2451: 		    }
1.86      www      2452: # -------------------------------------------------------------------- chatsend
1.161     foxr     2453: 		} elsif ($userinput =~ /^chatsend/) {
                   2454: 		    if(isClient) {
                   2455: 			my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
                   2456: 			&chatadd($cdom,$cnum,$newpost);
                   2457: 			print $client "ok\n";
                   2458: 		    } else {
                   2459: 			Reply($client, "refused\n", $userinput);
                   2460: 		      
                   2461: 		    }
1.86      www      2462: # -------------------------------------------------------------------- chatretr
1.161     foxr     2463: 		} elsif ($userinput =~ /^chatretr/) {
                   2464: 		    if(isClient) {
                   2465: 			my 
                   2466: 			    ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
                   2467: 			my $reply='';
                   2468: 			foreach (&getchat($cdom,$cnum,$udom,$uname)) {
                   2469: 			    $reply.=&escape($_).':';
                   2470: 			}
                   2471: 			$reply=~s/\:$//;
                   2472: 			print $client $reply."\n";
                   2473: 		    } else {
                   2474: 			Reply($client, "refused\n", $userinput);
                   2475: 		       
                   2476: 		    }
1.12      harris41 2477: # ------------------------------------------------------------------- querysend
1.161     foxr     2478: 		} elsif ($userinput =~ /^querysend/) {
                   2479: 		    if(isClient) {
                   2480: 			my ($cmd,$query,
                   2481: 			    $arg1,$arg2,$arg3)=split(/\:/,$userinput);
                   2482: 			$query=~s/\n*$//g;
                   2483: 			print $client "".
                   2484: 			    sqlreply("$clientname\&$query".
                   2485: 				     "\&$arg1"."\&$arg2"."\&$arg3")."\n";
                   2486: 		    } else {
                   2487: 			Reply($client, "refused\n", $userinput);
                   2488: 		      
                   2489: 		    }
1.12      harris41 2490: # ------------------------------------------------------------------ queryreply
1.161     foxr     2491: 		} elsif ($userinput =~ /^queryreply/) {
                   2492: 		    if(isClient) {
                   2493: 			my ($cmd,$id,$reply)=split(/:/,$userinput); 
                   2494: 			my $store;
                   2495: 			my $execdir=$perlvar{'lonDaemons'};
                   2496: 			if ($store=IO::File->new(">$execdir/tmp/$id")) {
                   2497: 			    $reply=~s/\&/\n/g;
                   2498: 			    print $store $reply;
                   2499: 			    close $store;
                   2500: 			    my $store2=IO::File->new(">$execdir/tmp/$id.end");
                   2501: 			    print $store2 "done\n";
                   2502: 			    close $store2;
                   2503: 			    print $client "ok\n";
                   2504: 			}
                   2505: 			else {
                   2506: 			    print $client "error: ".($!+0)
                   2507: 				." IO::File->new Failed ".
                   2508: 				"while attempting queryreply\n";
                   2509: 			}
                   2510: 		    } else {
                   2511: 			Reply($client, "refused\n", $userinput);
                   2512: 		     
                   2513: 		    }
1.118     www      2514: # ----------------------------------------------------------------- courseidput
1.161     foxr     2515: 		} elsif ($userinput =~ /^courseidput/) {
                   2516: 		    if(isClient) {
                   2517: 			my ($cmd,$udom,$what)=split(/:/,$userinput);
                   2518: 			chomp($what);
                   2519: 			$udom=~s/\W//g;
                   2520: 			my $proname=
                   2521: 			    "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
                   2522: 			my $now=time;
                   2523: 			my @pairs=split(/\&/,$what);
                   2524: 			my %hash;
                   2525: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
                   2526: 			    foreach my $pair (@pairs) {
                   2527: 				my ($key,$value)=split(/=/,$pair);
                   2528: 				$hash{$key}=$value.':'.$now;
                   2529: 			    }
                   2530: 			    if (untie(%hash)) {
                   2531: 				print $client "ok\n";
                   2532: 			    } else {
                   2533: 				print $client "error: ".($!+0)
                   2534: 				    ." untie(GDBM) Failed ".
                   2535: 				    "while attempting courseidput\n";
                   2536: 			    }
                   2537: 			} else {
                   2538: 			    print $client "error: ".($!+0)
                   2539: 				." tie(GDBM) Failed ".
                   2540: 				"while attempting courseidput\n";
                   2541: 			}
                   2542: 		    } else {
                   2543: 			Reply($client, "refused\n", $userinput);
                   2544: 		       
                   2545: 		    }
1.118     www      2546: # ---------------------------------------------------------------- courseiddump
1.161     foxr     2547: 		} elsif ($userinput =~ /^courseiddump/) {
                   2548: 		    if(isClient) {
                   2549: 			my ($cmd,$udom,$since,$description)
                   2550: 			    =split(/:/,$userinput);
                   2551: 			if (defined($description)) {
                   2552: 			    $description=&unescape($description);
                   2553: 			} else {
                   2554: 			    $description='.';
                   2555: 			}
                   2556: 			unless (defined($since)) { $since=0; }
                   2557: 			my $qresult='';
                   2558: 			my $proname=
                   2559: 			    "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
                   2560: 			my %hash;
                   2561: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
                   2562: 			    while (my ($key,$value) = each(%hash)) {
                   2563: 				my ($descr,$lasttime)=split(/\:/,$value);
                   2564: 				if ($lasttime<$since) { next; }
                   2565: 				if ($description eq '.') {
                   2566: 				    $qresult.=$key.'='.$descr.'&';
                   2567: 				} else {
                   2568: 				    my $unescapeVal = &unescape($descr);
                   2569: 				    if (eval('$unescapeVal=~/$description/i')) {
                   2570: 					$qresult.="$key=$descr&";
                   2571: 				    }
                   2572: 				}
                   2573: 			    }
                   2574: 			    if (untie(%hash)) {
                   2575: 				chop($qresult);
                   2576: 				print $client "$qresult\n";
                   2577: 			    } else {
                   2578: 				print $client "error: ".($!+0)
                   2579: 				    ." untie(GDBM) Failed ".
                   2580: 				    "while attempting courseiddump\n";
                   2581: 			    }
                   2582: 			} else {
                   2583: 			    print $client "error: ".($!+0)
                   2584: 				." tie(GDBM) Failed ".
                   2585: 				"while attempting courseiddump\n";
                   2586: 			}
                   2587: 		    } else {
                   2588: 			Reply($client, "refused\n", $userinput);
                   2589: 		       
                   2590: 		    }
1.1       albertel 2591: # ----------------------------------------------------------------------- idput
1.161     foxr     2592: 		} elsif ($userinput =~ /^idput/) {
                   2593: 		    if(isClient) {
                   2594: 			my ($cmd,$udom,$what)=split(/:/,$userinput);
                   2595: 			chomp($what);
                   2596: 			$udom=~s/\W//g;
                   2597: 			my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
                   2598: 			my $now=time;
                   2599: 			{
                   2600: 			    my $hfh;
                   2601: 			    if (
                   2602: 				$hfh=IO::File->new(">>$proname.hist")
                   2603: 				) { print $hfh "P:$now:$what\n"; }
                   2604: 			}
                   2605: 			my @pairs=split(/\&/,$what);
                   2606: 			my %hash;
                   2607: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
                   2608: 			    foreach my $pair (@pairs) {
                   2609: 				my ($key,$value)=split(/=/,$pair);
                   2610: 				$hash{$key}=$value;
                   2611: 			    }
                   2612: 			    if (untie(%hash)) {
                   2613: 				print $client "ok\n";
                   2614: 			    } else {
                   2615: 				print $client "error: ".($!+0)
                   2616: 				    ." untie(GDBM) Failed ".
                   2617: 				    "while attempting idput\n";
                   2618: 			    }
                   2619: 			} else {
                   2620: 			    print $client "error: ".($!+0)
                   2621: 				." tie(GDBM) Failed ".
                   2622: 				"while attempting idput\n";
                   2623: 			}
                   2624: 		    } else {
                   2625: 			Reply($client, "refused\n", $userinput);
                   2626: 		       
                   2627: 		    }
1.1       albertel 2628: # ----------------------------------------------------------------------- idget
1.161     foxr     2629: 		} elsif ($userinput =~ /^idget/) {
                   2630: 		    if(isClient) {
                   2631: 			my ($cmd,$udom,$what)=split(/:/,$userinput);
                   2632: 			chomp($what);
                   2633: 			$udom=~s/\W//g;
                   2634: 			my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
                   2635: 			my @queries=split(/\&/,$what);
                   2636: 			my $qresult='';
                   2637: 			my %hash;
                   2638: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
                   2639: 			    for (my $i=0;$i<=$#queries;$i++) {
                   2640: 				$qresult.="$hash{$queries[$i]}&";
                   2641: 			    }
                   2642: 			    if (untie(%hash)) {
                   2643: 				$qresult=~s/\&$//;
                   2644: 				print $client "$qresult\n";
                   2645: 			    } else {
                   2646: 				print $client "error: ".($!+0)
                   2647: 				    ." untie(GDBM) Failed ".
                   2648: 				    "while attempting idget\n";
                   2649: 			    }
                   2650: 			} else {
                   2651: 			    print $client "error: ".($!+0)
                   2652: 				." tie(GDBM) Failed ".
                   2653: 				"while attempting idget\n";
                   2654: 			}
                   2655: 		    } else {
                   2656: 			Reply($client, "refused\n", $userinput);
                   2657: 		       
                   2658: 		    }
1.13      www      2659: # ---------------------------------------------------------------------- tmpput
1.161     foxr     2660: 		} elsif ($userinput =~ /^tmpput/) {
                   2661: 		    if(isClient) {
                   2662: 			my ($cmd,$what)=split(/:/,$userinput);
                   2663: 			my $store;
                   2664: 			$tmpsnum++;
                   2665: 			my $id=$$.'_'.$clientip.'_'.$tmpsnum;
                   2666: 			$id=~s/\W/\_/g;
                   2667: 			$what=~s/\n//g;
                   2668: 			my $execdir=$perlvar{'lonDaemons'};
                   2669: 			if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
                   2670: 			    print $store $what;
                   2671: 			    close $store;
                   2672: 			    print $client "$id\n";
                   2673: 			}
                   2674: 			else {
                   2675: 			    print $client "error: ".($!+0)
                   2676: 				."IO::File->new Failed ".
                   2677: 				"while attempting tmpput\n";
                   2678: 			}
                   2679: 		    } else {
                   2680: 			Reply($client, "refused\n", $userinput);
                   2681: 		    
                   2682: 		    }
                   2683: 		    
1.13      www      2684: # ---------------------------------------------------------------------- tmpget
1.161     foxr     2685: 		} elsif ($userinput =~ /^tmpget/) {
                   2686: 		    if(isClient) {
                   2687: 			my ($cmd,$id)=split(/:/,$userinput);
                   2688: 			chomp($id);
                   2689: 			$id=~s/\W/\_/g;
                   2690: 			my $store;
                   2691: 			my $execdir=$perlvar{'lonDaemons'};
                   2692: 			if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
                   2693: 			    my $reply=<$store>;
                   2694: 			    print $client "$reply\n";
                   2695: 			    close $store;
                   2696: 			}
                   2697: 			else {
                   2698: 			    print $client "error: ".($!+0)
                   2699: 				."IO::File->new Failed ".
                   2700: 				"while attempting tmpget\n";
                   2701: 			}
                   2702: 		    } else {
                   2703: 			Reply($client, "refused\n", $userinput);
                   2704: 		      
                   2705: 		    }
1.110     www      2706: # ---------------------------------------------------------------------- tmpdel
1.161     foxr     2707: 		} elsif ($userinput =~ /^tmpdel/) {
                   2708: 		    if(isClient) {
                   2709: 			my ($cmd,$id)=split(/:/,$userinput);
                   2710: 			chomp($id);
                   2711: 			$id=~s/\W/\_/g;
                   2712: 			my $execdir=$perlvar{'lonDaemons'};
                   2713: 			if (unlink("$execdir/tmp/$id.tmp")) {
                   2714: 			    print $client "ok\n";
                   2715: 			} else {
                   2716: 			    print $client "error: ".($!+0)
                   2717: 				."Unlink tmp Failed ".
                   2718: 				"while attempting tmpdel\n";
                   2719: 			}
                   2720: 		    } else {
                   2721: 			Reply($client, "refused\n", $userinput);
                   2722: 		     
                   2723: 		    }
1.5       www      2724: # -------------------------------------------------------------------------- ls
1.161     foxr     2725: 		} elsif ($userinput =~ /^ls/) {
                   2726: 		    if(isClient) {
                   2727: 			my ($cmd,$ulsdir)=split(/:/,$userinput);
                   2728: 			my $ulsout='';
                   2729: 			my $ulsfn;
                   2730: 			if (-e $ulsdir) {
                   2731: 			    if(-d $ulsdir) {
                   2732: 				if (opendir(LSDIR,$ulsdir)) {
                   2733: 				    while ($ulsfn=readdir(LSDIR)) {
                   2734: 					my @ulsstats=stat($ulsdir.'/'.$ulsfn);
                   2735: 					$ulsout.=$ulsfn.'&'.
                   2736: 					    join('&',@ulsstats).':';
                   2737: 				    }
                   2738: 				    closedir(LSDIR);
                   2739: 				}
                   2740: 			    } else {
                   2741: 				my @ulsstats=stat($ulsdir);
                   2742: 				$ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
                   2743: 			    }
                   2744: 			} else {
                   2745: 			    $ulsout='no_such_dir';
                   2746: 			}
                   2747: 			if ($ulsout eq '') { $ulsout='empty'; }
                   2748: 			print $client "$ulsout\n";
                   2749: 		    } else {
                   2750: 			Reply($client, "refused\n", $userinput);
                   2751: 		     
                   2752: 		    }
1.136     www      2753: # ----------------------------------------------------------------- setannounce
1.161     foxr     2754: 		} elsif ($userinput =~ /^setannounce/) {
                   2755: 		    if (isClient) {
                   2756: 			my ($cmd,$announcement)=split(/:/,$userinput);
                   2757: 			chomp($announcement);
                   2758: 			$announcement=&unescape($announcement);
                   2759: 			if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
                   2760: 						    '/announcement.txt')) {
                   2761: 			    print $store $announcement;
                   2762: 			    close $store;
                   2763: 			    print $client "ok\n";
                   2764: 			} else {
                   2765: 			    print $client "error: ".($!+0)."\n";
                   2766: 			}
                   2767: 		    } else {
                   2768: 			Reply($client, "refused\n", $userinput);
                   2769: 		       
                   2770: 		    }
1.51      www      2771: # ------------------------------------------------------------------ Hanging up
1.161     foxr     2772: 		} elsif (($userinput =~ /^exit/) ||
                   2773: 			 ($userinput =~ /^init/)) { # no restrictions.
                   2774: 		    &logthis(
                   2775: 			     "Client $clientip ($clientname) hanging up: $userinput");
                   2776: 		    print $client "bye\n";
1.164     foxr     2777: 		    $client->shutdown(2);        # shutdown the socket forcibly.
1.161     foxr     2778: 		    $client->close();
                   2779: 		    last;
                   2780: 
                   2781: # ---------------------------------- set current host/domain
                   2782: 		} elsif ($userinput =~ /^sethost:/) {
                   2783: 		    if (isClient) {
                   2784: 			print $client &sethost($userinput)."\n";
                   2785: 		    } else {
                   2786: 			print $client "refused\n";
                   2787: 		    }
                   2788: #---------------------------------- request file (?) version.
                   2789: 		} elsif ($userinput =~/^version:/) {
                   2790: 		    if (isClient) {
                   2791: 			print $client &version($userinput)."\n";
                   2792: 		    } else {
                   2793: 			print $client "refused\n";
                   2794: 		    }
1.1       albertel 2795: # ------------------------------------------------------------- unknown command
1.161     foxr     2796: 
                   2797: 		} else {
                   2798: 		    # unknown command
                   2799: 		    print $client "unknown_cmd\n";
                   2800: 		}
1.58      www      2801: # -------------------------------------------------------------------- complete
1.161     foxr     2802: 		alarm(0);
                   2803: 		&status('Listening to '.$clientname);
                   2804: 	    }
1.59      www      2805: # --------------------------------------------- client unknown or fishy, refuse
1.161     foxr     2806: 	} else {
                   2807: 	    print $client "refused\n";
                   2808: 	    $client->close();
                   2809: 	    &logthis("<font color=blue>WARNING: "
                   2810: 		     ."Rejected client $clientip, closing connection</font>");
                   2811: 	}
                   2812:     }             
                   2813:     
1.1       albertel 2814: # =============================================================================
1.161     foxr     2815:     
                   2816:     &logthis("<font color=red>CRITICAL: "
                   2817: 	     ."Disconnect from $clientip ($clientname)</font>");    
                   2818:     
                   2819:     
                   2820:     # this exit is VERY important, otherwise the child will become
                   2821:     # a producer of more and more children, forking yourself into
                   2822:     # process death.
                   2823:     exit;
1.106     foxr     2824:     
1.78      foxr     2825: }
                   2826: 
                   2827: 
                   2828: #
                   2829: #   Checks to see if the input roleput request was to set
                   2830: # an author role.  If so, invokes the lchtmldir script to set
                   2831: # up a correct public_html 
                   2832: # Parameters:
                   2833: #    request   - The request sent to the rolesput subchunk.
                   2834: #                We're looking for  /domain/_au
                   2835: #    domain    - The domain in which the user is having roles doctored.
                   2836: #    user      - Name of the user for which the role is being put.
                   2837: #    authtype  - The authentication type associated with the user.
                   2838: #
                   2839: sub ManagePermissions
                   2840: {
                   2841:     my $request = shift;
                   2842:     my $domain  = shift;
                   2843:     my $user    = shift;
                   2844:     my $authtype= shift;
                   2845: 
                   2846:     # See if the request is of the form /$domain/_au
                   2847:     if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
                   2848: 	my $execdir = $perlvar{'lonDaemons'};
                   2849: 	my $userhome= "/home/$user" ;
1.134     albertel 2850: 	&logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78      foxr     2851: 	system("$execdir/lchtmldir $userhome $user $authtype");
                   2852:     }
                   2853: }
                   2854: #
                   2855: #   GetAuthType - Determines the authorization type of a user in a domain.
                   2856: 
                   2857: #     Returns the authorization type or nouser if there is no such user.
                   2858: #
                   2859: sub GetAuthType 
                   2860: {
                   2861:     my $domain = shift;
                   2862:     my $user   = shift;
                   2863: 
1.79      foxr     2864:     Debug("GetAuthType( $domain, $user ) \n");
1.78      foxr     2865:     my $proname    = &propath($domain, $user); 
                   2866:     my $passwdfile = "$proname/passwd";
                   2867:     if( -e $passwdfile ) {
                   2868: 	my $pf = IO::File->new($passwdfile);
                   2869: 	my $realpassword = <$pf>;
                   2870: 	chomp($realpassword);
1.79      foxr     2871: 	Debug("Password info = $realpassword\n");
1.78      foxr     2872: 	my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79      foxr     2873: 	Debug("Authtype = $authtype, content = $contentpwd\n");
1.78      foxr     2874: 	my $availinfo = '';
1.91      albertel 2875: 	if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78      foxr     2876: 	    $availinfo = $contentpwd;
                   2877: 	}
1.79      foxr     2878: 
1.78      foxr     2879: 	return "$authtype:$availinfo";
                   2880:     }
                   2881:     else {
1.79      foxr     2882: 	Debug("Returning nouser");
1.78      foxr     2883: 	return "nouser";
                   2884:     }
1.1       albertel 2885: }
                   2886: 
1.84      albertel 2887: sub addline {
                   2888:     my ($fname,$hostid,$ip,$newline)=@_;
                   2889:     my $contents;
                   2890:     my $found=0;
                   2891:     my $expr='^'.$hostid.':'.$ip.':';
                   2892:     $expr =~ s/\./\\\./g;
1.134     albertel 2893:     my $sh;
1.84      albertel 2894:     if ($sh=IO::File->new("$fname.subscription")) {
                   2895: 	while (my $subline=<$sh>) {
                   2896: 	    if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
                   2897: 	}
                   2898: 	$sh->close();
                   2899:     }
                   2900:     $sh=IO::File->new(">$fname.subscription");
                   2901:     if ($contents) { print $sh $contents; }
                   2902:     if ($newline) { print $sh $newline; }
                   2903:     $sh->close();
                   2904:     return $found;
1.86      www      2905: }
                   2906: 
                   2907: sub getchat {
1.122     www      2908:     my ($cdom,$cname,$udom,$uname)=@_;
1.87      www      2909:     my %hash;
                   2910:     my $proname=&propath($cdom,$cname);
                   2911:     my @entries=();
1.88      albertel 2912:     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
                   2913: 	    &GDBM_READER(),0640)) {
                   2914: 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
                   2915: 	untie %hash;
1.123     www      2916:     }
1.124     www      2917:     my @participants=();
1.134     albertel 2918:     my $cutoff=time-60;
1.123     www      2919:     if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124     www      2920: 	    &GDBM_WRCREAT(),0640)) {
                   2921:         $hash{$uname.':'.$udom}=time;
1.123     www      2922:         foreach (sort keys %hash) {
                   2923: 	    if ($hash{$_}>$cutoff) {
1.124     www      2924: 		$participants[$#participants+1]='active_participant:'.$_;
1.123     www      2925:             }
                   2926:         }
                   2927:         untie %hash;
1.86      www      2928:     }
1.124     www      2929:     return (@participants,@entries);
1.86      www      2930: }
                   2931: 
                   2932: sub chatadd {
1.88      albertel 2933:     my ($cdom,$cname,$newchat)=@_;
                   2934:     my %hash;
                   2935:     my $proname=&propath($cdom,$cname);
                   2936:     my @entries=();
1.142     www      2937:     my $time=time;
1.88      albertel 2938:     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
                   2939: 	    &GDBM_WRCREAT(),0640)) {
                   2940: 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
                   2941: 	my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
                   2942: 	my ($thentime,$idnum)=split(/\_/,$lastid);
                   2943: 	my $newid=$time.'_000000';
                   2944: 	if ($thentime==$time) {
                   2945: 	    $idnum=~s/^0+//;
                   2946: 	    $idnum++;
                   2947: 	    $idnum=substr('000000'.$idnum,-6,6);
                   2948: 	    $newid=$time.'_'.$idnum;
                   2949: 	}
                   2950: 	$hash{$newid}=$newchat;
                   2951: 	my $expired=$time-3600;
                   2952: 	foreach (keys %hash) {
                   2953: 	    my ($thistime)=($_=~/(\d+)\_/);
                   2954: 	    if ($thistime<$expired) {
1.89      www      2955: 		delete $hash{$_};
1.88      albertel 2956: 	    }
                   2957: 	}
                   2958: 	untie %hash;
1.142     www      2959:     }
                   2960:     {
                   2961: 	my $hfh;
                   2962: 	if ($hfh=IO::File->new(">>$proname/chatroom.log")) { 
                   2963: 	    print $hfh "$time:".&unescape($newchat)."\n";
                   2964: 	}
1.86      www      2965:     }
1.84      albertel 2966: }
                   2967: 
                   2968: sub unsub {
                   2969:     my ($fname,$clientip)=@_;
                   2970:     my $result;
1.161     foxr     2971:     if (unlink("$fname.$clientname")) {
1.84      albertel 2972: 	$result="ok\n";
                   2973:     } else {
                   2974: 	$result="not_subscribed\n";
                   2975:     }
                   2976:     if (-e "$fname.subscription") {
1.161     foxr     2977: 	my $found=&addline($fname,$clientname,$clientip,'');
1.84      albertel 2978: 	if ($found) { $result="ok\n"; }
                   2979:     } else {
                   2980: 	if ($result != "ok\n") { $result="not_subscribed\n"; }
                   2981:     }
                   2982:     return $result;
                   2983: }
                   2984: 
1.101     www      2985: sub currentversion {
                   2986:     my $fname=shift;
                   2987:     my $version=-1;
                   2988:     my $ulsdir='';
                   2989:     if ($fname=~/^(.+)\/[^\/]+$/) {
                   2990:        $ulsdir=$1;
                   2991:     }
1.114     albertel 2992:     my ($fnamere1,$fnamere2);
                   2993:     # remove version if already specified
1.101     www      2994:     $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114     albertel 2995:     # get the bits that go before and after the version number
                   2996:     if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
                   2997: 	$fnamere1=$1;
                   2998: 	$fnamere2='.'.$2;
                   2999:     }
1.101     www      3000:     if (-e $fname) { $version=1; }
                   3001:     if (-e $ulsdir) {
1.134     albertel 3002: 	if(-d $ulsdir) {
                   3003: 	    if (opendir(LSDIR,$ulsdir)) {
                   3004: 		my $ulsfn;
                   3005: 		while ($ulsfn=readdir(LSDIR)) {
1.101     www      3006: # see if this is a regular file (ignore links produced earlier)
1.134     albertel 3007: 		    my $thisfile=$ulsdir.'/'.$ulsfn;
                   3008: 		    unless (-l $thisfile) {
1.160     www      3009: 			if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134     albertel 3010: 			    if ($1>$version) { $version=$1; }
                   3011: 			}
                   3012: 		    }
                   3013: 		}
                   3014: 		closedir(LSDIR);
                   3015: 		$version++;
                   3016: 	    }
                   3017: 	}
                   3018:     }
                   3019:     return $version;
1.101     www      3020: }
                   3021: 
                   3022: sub thisversion {
                   3023:     my $fname=shift;
                   3024:     my $version=-1;
                   3025:     if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
                   3026: 	$version=$1;
                   3027:     }
                   3028:     return $version;
                   3029: }
                   3030: 
1.84      albertel 3031: sub subscribe {
                   3032:     my ($userinput,$clientip)=@_;
                   3033:     my $result;
                   3034:     my ($cmd,$fname)=split(/:/,$userinput);
                   3035:     my $ownership=&ishome($fname);
                   3036:     if ($ownership eq 'owner') {
1.101     www      3037: # explitly asking for the current version?
                   3038:         unless (-e $fname) {
                   3039:             my $currentversion=&currentversion($fname);
                   3040: 	    if (&thisversion($fname)==$currentversion) {
                   3041:                 if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
                   3042: 		    my $root=$1;
                   3043:                     my $extension=$2;
                   3044:                     symlink($root.'.'.$extension,
                   3045:                             $root.'.'.$currentversion.'.'.$extension);
1.102     www      3046:                     unless ($extension=~/\.meta$/) {
                   3047:                        symlink($root.'.'.$extension.'.meta',
                   3048:                             $root.'.'.$currentversion.'.'.$extension.'.meta');
                   3049: 		    }
1.101     www      3050:                 }
                   3051:             }
                   3052:         }
1.84      albertel 3053: 	if (-e $fname) {
                   3054: 	    if (-d $fname) {
                   3055: 		$result="directory\n";
                   3056: 	    } else {
1.161     foxr     3057: 		if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134     albertel 3058: 		my $now=time;
1.161     foxr     3059: 		my $found=&addline($fname,$clientname,$clientip,
                   3060: 				   "$clientname:$clientip:$now\n");
1.84      albertel 3061: 		if ($found) { $result="$fname\n"; }
                   3062: 		# if they were subscribed to only meta data, delete that
                   3063:                 # subscription, when you subscribe to a file you also get
                   3064:                 # the metadata
                   3065: 		unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
                   3066: 		$fname=~s/\/home\/httpd\/html\/res/raw/;
                   3067: 		$fname="http://$thisserver/".$fname;
                   3068: 		$result="$fname\n";
                   3069: 	    }
                   3070: 	} else {
                   3071: 	    $result="not_found\n";
                   3072: 	}
                   3073:     } else {
                   3074: 	$result="rejected\n";
                   3075:     }
                   3076:     return $result;
                   3077: }
1.91      albertel 3078: 
                   3079: sub make_passwd_file {
1.98      foxr     3080:     my ($uname, $umode,$npass,$passfilename)=@_;
1.91      albertel 3081:     my $result="ok\n";
                   3082:     if ($umode eq 'krb4' or $umode eq 'krb5') {
                   3083: 	{
                   3084: 	    my $pf = IO::File->new(">$passfilename");
                   3085: 	    print $pf "$umode:$npass\n";
                   3086: 	}
                   3087:     } elsif ($umode eq 'internal') {
                   3088: 	my $salt=time;
                   3089: 	$salt=substr($salt,6,2);
                   3090: 	my $ncpass=crypt($npass,$salt);
                   3091: 	{
                   3092: 	    &Debug("Creating internal auth");
                   3093: 	    my $pf = IO::File->new(">$passfilename");
                   3094: 	    print $pf "internal:$ncpass\n"; 
                   3095: 	}
                   3096:     } elsif ($umode eq 'localauth') {
                   3097: 	{
                   3098: 	    my $pf = IO::File->new(">$passfilename");
                   3099: 	    print $pf "localauth:$npass\n";
                   3100: 	}
                   3101:     } elsif ($umode eq 'unix') {
                   3102: 	{
                   3103: 	    my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
                   3104: 	    {
                   3105: 		&Debug("Executing external: ".$execpath);
1.98      foxr     3106: 		&Debug("user  = ".$uname.", Password =". $npass);
1.132     matthew  3107: 		my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91      albertel 3108: 		print $se "$uname\n";
                   3109: 		print $se "$npass\n";
                   3110: 		print $se "$npass\n";
1.97      foxr     3111: 	    }
                   3112: 	    my $useraddok = $?;
                   3113: 	    if($useraddok > 0) {
                   3114: 		&logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1.91      albertel 3115: 	    }
                   3116: 	    my $pf = IO::File->new(">$passfilename");
                   3117: 	    print $pf "unix:\n";
                   3118: 	}
                   3119:     } elsif ($umode eq 'none') {
                   3120: 	{
                   3121: 	    my $pf = IO::File->new(">$passfilename");
                   3122: 	    print $pf "none:\n";
                   3123: 	}
                   3124:     } else {
                   3125: 	$result="auth_mode_error\n";
                   3126:     }
                   3127:     return $result;
1.121     albertel 3128: }
                   3129: 
                   3130: sub sethost {
                   3131:     my ($remotereq) = @_;
                   3132:     my (undef,$hostid)=split(/:/,$remotereq);
                   3133:     if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
                   3134:     if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
                   3135: 	$currenthostid=$hostid;
                   3136: 	$currentdomainid=$hostdom{$hostid};
                   3137: 	&logthis("Setting hostid to $hostid, and domain to $currentdomainid");
                   3138:     } else {
                   3139: 	&logthis("Requested host id $hostid not an alias of ".
                   3140: 		 $perlvar{'lonHostID'}." refusing connection");
                   3141: 	return 'unable_to_set';
                   3142:     }
                   3143:     return 'ok';
                   3144: }
                   3145: 
                   3146: sub version {
                   3147:     my ($userinput)=@_;
                   3148:     $remoteVERSION=(split(/:/,$userinput))[1];
                   3149:     return "version:$VERSION";
1.127     albertel 3150: }
                   3151: 
1.128     albertel 3152: #There is a copy of this in lonnet.pm
1.127     albertel 3153: sub userload {
                   3154:     my $numusers=0;
                   3155:     {
                   3156: 	opendir(LONIDS,$perlvar{'lonIDsDir'});
                   3157: 	my $filename;
                   3158: 	my $curtime=time;
                   3159: 	while ($filename=readdir(LONIDS)) {
                   3160: 	    if ($filename eq '.' || $filename eq '..') {next;}
1.138     albertel 3161: 	    my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159     albertel 3162: 	    if ($curtime-$mtime < 1800) { $numusers++; }
1.127     albertel 3163: 	}
                   3164: 	closedir(LONIDS);
                   3165:     }
                   3166:     my $userloadpercent=0;
                   3167:     my $maxuserload=$perlvar{'lonUserLoadLim'};
                   3168:     if ($maxuserload) {
1.129     albertel 3169: 	$userloadpercent=100*$numusers/$maxuserload;
1.127     albertel 3170:     }
1.130     albertel 3171:     $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127     albertel 3172:     return $userloadpercent;
1.91      albertel 3173: }
                   3174: 
1.61      harris41 3175: # ----------------------------------- POD (plain old documentation, CPAN style)
                   3176: 
                   3177: =head1 NAME
                   3178: 
                   3179: lond - "LON Daemon" Server (port "LOND" 5663)
                   3180: 
                   3181: =head1 SYNOPSIS
                   3182: 
1.74      harris41 3183: Usage: B<lond>
                   3184: 
                   3185: Should only be run as user=www.  This is a command-line script which
                   3186: is invoked by B<loncron>.  There is no expectation that a typical user
                   3187: will manually start B<lond> from the command-line.  (In other words,
                   3188: DO NOT START B<lond> YOURSELF.)
1.61      harris41 3189: 
                   3190: =head1 DESCRIPTION
                   3191: 
1.74      harris41 3192: There are two characteristics associated with the running of B<lond>,
                   3193: PROCESS MANAGEMENT (starting, stopping, handling child processes)
                   3194: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
                   3195: subscriptions, etc).  These are described in two large
                   3196: sections below.
                   3197: 
                   3198: B<PROCESS MANAGEMENT>
                   3199: 
1.61      harris41 3200: Preforker - server who forks first. Runs as a daemon. HUPs.
                   3201: Uses IDEA encryption
                   3202: 
1.74      harris41 3203: B<lond> forks off children processes that correspond to the other servers
                   3204: in the network.  Management of these processes can be done at the
                   3205: parent process level or the child process level.
                   3206: 
                   3207: B<logs/lond.log> is the location of log messages.
                   3208: 
                   3209: The process management is now explained in terms of linux shell commands,
                   3210: subroutines internal to this code, and signal assignments:
                   3211: 
                   3212: =over 4
                   3213: 
                   3214: =item *
                   3215: 
                   3216: PID is stored in B<logs/lond.pid>
                   3217: 
                   3218: This is the process id number of the parent B<lond> process.
                   3219: 
                   3220: =item *
                   3221: 
                   3222: SIGTERM and SIGINT
                   3223: 
                   3224: Parent signal assignment:
                   3225:  $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                   3226: 
                   3227: Child signal assignment:
                   3228:  $SIG{INT}  = 'DEFAULT'; (and SIGTERM is DEFAULT also)
                   3229: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
                   3230:  to restart a new child.)
                   3231: 
                   3232: Command-line invocations:
                   3233:  B<kill> B<-s> SIGTERM I<PID>
                   3234:  B<kill> B<-s> SIGINT I<PID>
                   3235: 
                   3236: Subroutine B<HUNTSMAN>:
                   3237:  This is only invoked for the B<lond> parent I<PID>.
                   3238: This kills all the children, and then the parent.
                   3239: The B<lonc.pid> file is cleared.
                   3240: 
                   3241: =item *
                   3242: 
                   3243: SIGHUP
                   3244: 
                   3245: Current bug:
                   3246:  This signal can only be processed the first time
                   3247: on the parent process.  Subsequent SIGHUP signals
                   3248: have no effect.
                   3249: 
                   3250: Parent signal assignment:
                   3251:  $SIG{HUP}  = \&HUPSMAN;
                   3252: 
                   3253: Child signal assignment:
                   3254:  none (nothing happens)
                   3255: 
                   3256: Command-line invocations:
                   3257:  B<kill> B<-s> SIGHUP I<PID>
                   3258: 
                   3259: Subroutine B<HUPSMAN>:
                   3260:  This is only invoked for the B<lond> parent I<PID>,
                   3261: This kills all the children, and then the parent.
                   3262: The B<lond.pid> file is cleared.
                   3263: 
                   3264: =item *
                   3265: 
                   3266: SIGUSR1
                   3267: 
                   3268: Parent signal assignment:
                   3269:  $SIG{USR1} = \&USRMAN;
                   3270: 
                   3271: Child signal assignment:
                   3272:  $SIG{USR1}= \&logstatus;
                   3273: 
                   3274: Command-line invocations:
                   3275:  B<kill> B<-s> SIGUSR1 I<PID>
                   3276: 
                   3277: Subroutine B<USRMAN>:
                   3278:  When invoked for the B<lond> parent I<PID>,
                   3279: SIGUSR1 is sent to all the children, and the status of
                   3280: each connection is logged.
1.144     foxr     3281: 
                   3282: =item *
                   3283: 
                   3284: SIGUSR2
                   3285: 
                   3286: Parent Signal assignment:
                   3287:     $SIG{USR2} = \&UpdateHosts
                   3288: 
                   3289: Child signal assignment:
                   3290:     NONE
                   3291: 
1.74      harris41 3292: 
                   3293: =item *
                   3294: 
                   3295: SIGCHLD
                   3296: 
                   3297: Parent signal assignment:
                   3298:  $SIG{CHLD} = \&REAPER;
                   3299: 
                   3300: Child signal assignment:
                   3301:  none
                   3302: 
                   3303: Command-line invocations:
                   3304:  B<kill> B<-s> SIGCHLD I<PID>
                   3305: 
                   3306: Subroutine B<REAPER>:
                   3307:  This is only invoked for the B<lond> parent I<PID>.
                   3308: Information pertaining to the child is removed.
                   3309: The socket port is cleaned up.
                   3310: 
                   3311: =back
                   3312: 
                   3313: B<SERVER-SIDE ACTIVITIES>
                   3314: 
                   3315: Server-side information can be accepted in an encrypted or non-encrypted
                   3316: method.
                   3317: 
                   3318: =over 4
                   3319: 
                   3320: =item ping
                   3321: 
                   3322: Query a client in the hosts.tab table; "Are you there?"
                   3323: 
                   3324: =item pong
                   3325: 
                   3326: Respond to a ping query.
                   3327: 
                   3328: =item ekey
                   3329: 
                   3330: Read in encrypted key, make cipher.  Respond with a buildkey.
                   3331: 
                   3332: =item load
                   3333: 
                   3334: Respond with CPU load based on a computation upon /proc/loadavg.
                   3335: 
                   3336: =item currentauth
                   3337: 
                   3338: Reply with current authentication information (only over an
                   3339: encrypted channel).
                   3340: 
                   3341: =item auth
                   3342: 
                   3343: Only over an encrypted channel, reply as to whether a user's
                   3344: authentication information can be validated.
                   3345: 
                   3346: =item passwd
                   3347: 
                   3348: Allow for a password to be set.
                   3349: 
                   3350: =item makeuser
                   3351: 
                   3352: Make a user.
                   3353: 
                   3354: =item passwd
                   3355: 
                   3356: Allow for authentication mechanism and password to be changed.
                   3357: 
                   3358: =item home
1.61      harris41 3359: 
1.74      harris41 3360: Respond to a question "are you the home for a given user?"
                   3361: 
                   3362: =item update
                   3363: 
                   3364: Update contents of a subscribed resource.
                   3365: 
                   3366: =item unsubscribe
                   3367: 
                   3368: The server is unsubscribing from a resource.
                   3369: 
                   3370: =item subscribe
                   3371: 
                   3372: The server is subscribing to a resource.
                   3373: 
                   3374: =item log
                   3375: 
                   3376: Place in B<logs/lond.log>
                   3377: 
                   3378: =item put
                   3379: 
                   3380: stores hash in namespace
                   3381: 
                   3382: =item rolesput
                   3383: 
                   3384: put a role into a user's environment
                   3385: 
                   3386: =item get
                   3387: 
                   3388: returns hash with keys from array
                   3389: reference filled in from namespace
                   3390: 
                   3391: =item eget
                   3392: 
                   3393: returns hash with keys from array
                   3394: reference filled in from namesp (encrypts the return communication)
                   3395: 
                   3396: =item rolesget
                   3397: 
                   3398: get a role from a user's environment
                   3399: 
                   3400: =item del
                   3401: 
                   3402: deletes keys out of array from namespace
                   3403: 
                   3404: =item keys
                   3405: 
                   3406: returns namespace keys
                   3407: 
                   3408: =item dump
                   3409: 
                   3410: dumps the complete (or key matching regexp) namespace into a hash
                   3411: 
                   3412: =item store
                   3413: 
                   3414: stores hash permanently
                   3415: for this url; hashref needs to be given and should be a \%hashname; the
                   3416: remaining args aren't required and if they aren't passed or are '' they will
                   3417: be derived from the ENV
                   3418: 
                   3419: =item restore
                   3420: 
                   3421: returns a hash for a given url
                   3422: 
                   3423: =item querysend
                   3424: 
                   3425: Tells client about the lonsql process that has been launched in response
                   3426: to a sent query.
                   3427: 
                   3428: =item queryreply
                   3429: 
                   3430: Accept information from lonsql and make appropriate storage in temporary
                   3431: file space.
                   3432: 
                   3433: =item idput
                   3434: 
                   3435: Defines usernames as corresponding to IDs.  (These "IDs" are unique identifiers
                   3436: for each student, defined perhaps by the institutional Registrar.)
                   3437: 
                   3438: =item idget
                   3439: 
                   3440: Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
                   3441: for each student, defined perhaps by the institutional Registrar.)
                   3442: 
                   3443: =item tmpput
                   3444: 
                   3445: Accept and store information in temporary space.
                   3446: 
                   3447: =item tmpget
                   3448: 
                   3449: Send along temporarily stored information.
                   3450: 
                   3451: =item ls
                   3452: 
                   3453: List part of a user's directory.
                   3454: 
1.135     foxr     3455: =item pushtable
                   3456: 
                   3457: Pushes a file in /home/httpd/lonTab directory.  Currently limited to:
                   3458: hosts.tab and domain.tab. The old file is copied to  *.tab.backup but
                   3459: must be restored manually in case of a problem with the new table file.
                   3460: pushtable requires that the request be encrypted and validated via
                   3461: ValidateManager.  The form of the command is:
                   3462: enc:pushtable tablename <tablecontents> \n
                   3463: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a 
                   3464: cleartext newline.
                   3465: 
1.74      harris41 3466: =item Hanging up (exit or init)
                   3467: 
                   3468: What to do when a client tells the server that they (the client)
                   3469: are leaving the network.
                   3470: 
                   3471: =item unknown command
                   3472: 
                   3473: If B<lond> is sent an unknown command (not in the list above),
                   3474: it replys to the client "unknown_cmd".
1.135     foxr     3475: 
1.74      harris41 3476: 
                   3477: =item UNKNOWN CLIENT
                   3478: 
                   3479: If the anti-spoofing algorithm cannot verify the client,
                   3480: the client is rejected (with a "refused" message sent
                   3481: to the client, and the connection is closed.
                   3482: 
                   3483: =back
1.61      harris41 3484: 
                   3485: =head1 PREREQUISITES
                   3486: 
                   3487: IO::Socket
                   3488: IO::File
                   3489: Apache::File
                   3490: Symbol
                   3491: POSIX
                   3492: Crypt::IDEA
                   3493: LWP::UserAgent()
                   3494: GDBM_File
                   3495: Authen::Krb4
1.91      albertel 3496: Authen::Krb5
1.61      harris41 3497: 
                   3498: =head1 COREQUISITES
                   3499: 
                   3500: =head1 OSNAMES
                   3501: 
                   3502: linux
                   3503: 
                   3504: =head1 SCRIPT CATEGORIES
                   3505: 
                   3506: Server/Process
                   3507: 
                   3508: =cut

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