Annotation of loncom/lond, revision 1.154

1.1       albertel    1: #!/usr/bin/perl
                      2: # The LearningOnline Network
                      3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60      www         4: #
1.154   ! albertel    5: # $Id: lond,v 1.153 2003/10/08 14:30:09 www Exp $
1.60      www         6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
                     13: # the Free Software Foundation; either version 2 of the License, or
                     14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
                     27: # http://www.lon-capa.org/
                     28: #
1.1       albertel   29: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
1.2       www        30: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
1.6       www        31: # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
1.11      www        32: # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
1.12      harris41   33: # 03/07,05/31 Gerd Kortemeyer
1.20      www        34: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
1.34      www        35: # 12/05,12/13,12/29 Gerd Kortemeyer
1.61      harris41   36: # YEAR=2001
1.36      www        37: # 02/12 Gerd Kortemeyer
1.41      www        38: # 03/24 Gerd Kortemeyer
1.51      www        39: # 05/11,05/28,08/30 Gerd Kortemeyer
1.59      www        40: # 11/26,11/27 Gerd Kortemeyer
1.62      www        41: # 12/22 Gerd Kortemeyer
1.63      www        42: # YEAR=2002
1.65      www        43: # 01/20/02,02/05 Gerd Kortemeyer
1.71      www        44: # 02/05 Guy Albertelli
                     45: # 02/12 Gerd Kortemeyer
1.73      www        46: # 02/19 Matthew Hall
                     47: # 02/25 Gerd Kortemeyer
1.106     foxr       48: # 01/xx/2003 Ron Fox.. Remove preforking.  This makes the general daemon
                     49: #      logic simpler (and there were problems maintaining the preforked
                     50: #      population).  Since the time averaged connection rate is close to zero
                     51: #      because lonc's purpose is to maintain near continuous connnections,
                     52: #      preforking is not really needed.
1.135     foxr       53: # 08/xx/2003 Ron Fox:  Add management requests.  Management requests
                     54: #      will be validated via a call to ValidateManager. At present, this
                     55: #      is done by simple host verification.  In the future we can modify
                     56: #      this function to do a certificate check.
                     57: #      Management functions supported include:
                     58: #       - pushing /home/httpd/lonTabs/hosts.tab
                     59: #       - pushing /home/httpd/lonTabs/domain.tab
1.141     foxr       60: # 09/08/2003 Ron Fox:  Told lond to take care of change logging so we
                     61: #      don't have to remember it:
1.142     www        62: #
1.141     foxr       63: 
1.54      harris41   64: 
1.134     albertel   65: use strict;
1.80      harris41   66: use lib '/home/httpd/lib/perl/';
                     67: use LONCAPA::Configuration;
                     68: 
1.1       albertel   69: use IO::Socket;
                     70: use IO::File;
1.126     albertel   71: #use Apache::File;
1.1       albertel   72: use Symbol;
                     73: use POSIX;
                     74: use Crypt::IDEA;
                     75: use LWP::UserAgent();
1.3       www        76: use GDBM_File;
                     77: use Authen::Krb4;
1.91      albertel   78: use Authen::Krb5;
1.49      albertel   79: use lib '/home/httpd/lib/perl/';
                     80: use localauth;
1.143     foxr       81: use File::Copy;
1.1       albertel   82: 
1.77      foxr       83: my $DEBUG = 0;		       # Non zero to enable debug log entries.
                     84: 
1.57      www        85: my $status='';
                     86: my $lastlog='';
                     87: 
1.154   ! albertel   88: my $VERSION='$Revision: 1.153 $'; #' stupid emacs
1.121     albertel   89: my $remoteVERSION;
1.115     albertel   90: my $currenthostid;
                     91: my $currentdomainid;
1.134     albertel   92: 
                     93: my $client;
1.140     foxr       94: my $clientip;
                     95: 
1.134     albertel   96: my $server;
                     97: my $thisserver;
                     98: 
                     99: my %hostid;
                    100: my %hostdom;
                    101: my %hostip;
1.141     foxr      102: my %perlvar;			# Will have the apache conf defined perl vars.
1.134     albertel  103: 
1.96      foxr      104: #
                    105: #  The array below are password error strings."
                    106: #
1.97      foxr      107: my $lastpwderror    = 13;		# Largest error number from lcpasswd.
1.96      foxr      108: my @passwderrors = ("ok",
                    109: 		   "lcpasswd must be run as user 'www'",
                    110: 		   "lcpasswd got incorrect number of arguments",
                    111: 		   "lcpasswd did not get the right nubmer of input text lines",
                    112: 		   "lcpasswd too many simultaneous pwd changes in progress",
                    113: 		   "lcpasswd User does not exist.",
                    114: 		   "lcpasswd Incorrect current passwd",
                    115: 		   "lcpasswd Unable to su to root.",
                    116: 		   "lcpasswd Cannot set new passwd.",
                    117: 		   "lcpasswd Username has invalid characters",
1.97      foxr      118: 		   "lcpasswd Invalid characters in password",
                    119: 		    "11", "12",
                    120: 		    "lcpasswd Password mismatch");
                    121: 
                    122: 
                    123: #  The array below are lcuseradd error strings.:
                    124: 
                    125: my $lastadderror = 13;
                    126: my @adderrors    = ("ok",
                    127: 		    "User ID mismatch, lcuseradd must run as user www",
                    128: 		    "lcuseradd Incorrect number of command line parameters must be 3",
                    129: 		    "lcuseradd Incorrect number of stdinput lines, must be 3",
                    130: 		    "lcuseradd Too many other simultaneous pwd changes in progress",
                    131: 		    "lcuseradd User does not exist",
1.153     www       132: 		    "lcuseradd Unable to make www member of users's group",
1.97      foxr      133: 		    "lcuseradd Unable to su to root",
                    134: 		    "lcuseradd Unable to set password",
1.153     www       135: 		    "lcuseradd Usrname has invalid characters",
1.97      foxr      136: 		    "lcuseradd Password has an invalid character",
                    137: 		    "lcuseradd User already exists",
                    138: 		    "lcuseradd Could not add user.",
                    139: 		    "lcuseradd Password mismatch");
                    140: 
1.96      foxr      141: 
                    142: #
1.140     foxr      143: #   GetCertificate: Given a transaction that requires a certificate,
                    144: #   this function will extract the certificate from the transaction
                    145: #   request.  Note that at this point, the only concept of a certificate
                    146: #   is the hostname to which we are connected.
                    147: #
                    148: #   Parameter:
                    149: #      request   - The request sent by our client (this parameterization may
                    150: #                  need to change when we really use a certificate granting
                    151: #                  authority.
                    152: #
                    153: sub GetCertificate {
                    154:     my $request = shift;
                    155: 
                    156:     return $clientip;
                    157: }
                    158: 
                    159: 
                    160: #
                    161: #  ValidManager: Determines if a given certificate represents a valid manager.
                    162: #                in this primitive implementation, the 'certificate' is
                    163: #                just the connecting loncapa client name.  This is checked
                    164: #                against a valid client list in the configuration.
                    165: #
                    166: #                  
                    167: sub ValidManager {
                    168:     my $certificate = shift; 
                    169: 
                    170:     my $hostentry   = $hostid{$certificate};
                    171:     if ($hostentry ne undef) {
                    172: 	&logthis('<font color="yellow">Authenticating manager'.
                    173: 		 " $hostentry</font>");
                    174: 	return 1;
                    175:     } else {
                    176: 	&logthis('<font color="red"> Failed manager authentication '.
                    177: 		 "$certificate </font>");
                    178:     }
                    179: }
                    180: #
1.143     foxr      181: #  CopyFile:  Called as part of the process of installing a 
                    182: #             new configuration file.  This function copies an existing
                    183: #             file to a backup file.
                    184: # Parameters:
                    185: #     oldfile  - Name of the file to backup.
                    186: #     newfile  - Name of the backup file.
                    187: # Return:
                    188: #     0   - Failure (errno has failure reason).
                    189: #     1   - Success.
                    190: #
                    191: sub CopyFile {
                    192:     my $oldfile = shift;
                    193:     my $newfile = shift;
                    194: 
                    195:     #  The file must exist:
                    196: 
                    197:     if(-e $oldfile) {
                    198: 
                    199: 	 # Read the old file.
                    200: 
                    201: 	my $oldfh = IO::File->new("< $oldfile");
                    202: 	if(!$oldfh) {
                    203: 	    return 0;
                    204: 	}
                    205: 	my @contents = <$oldfh>;  # Suck in the entire file.
                    206: 
                    207: 	# write the backup file:
                    208: 
                    209: 	my $newfh = IO::File->new("> $newfile");
                    210: 	if(!(defined $newfh)){
                    211: 	    return 0;
                    212: 	}
                    213: 	my $lines = scalar @contents;
                    214: 	for (my $i =0; $i < $lines; $i++) {
                    215: 	    print $newfh ($contents[$i]);
                    216: 	}
                    217: 
                    218: 	$oldfh->close;
                    219: 	$newfh->close;
                    220: 
                    221: 	chmod(0660, $newfile);
                    222: 
                    223: 	return 1;
                    224: 	    
                    225:     } else {
                    226: 	return 0;
                    227:     }
                    228: }
                    229: 
                    230: #
                    231: #   InstallFile: Called to install an administrative file:
                    232: #       - The file is created with <name>.tmp
                    233: #       - The <name>.tmp file is then mv'd to <name>
                    234: #   This lugubrious procedure is done to ensure that we are never without
                    235: #   a valid, even if dated, version of the file regardless of who crashes
                    236: #   and when the crash occurs.
                    237: #
                    238: #  Parameters:
                    239: #       Name of the file
                    240: #       File Contents.
                    241: #  Return:
                    242: #      nonzero - success.
                    243: #      0       - failure and $! has an errno.
                    244: #
                    245: sub InstallFile {
                    246:     my $Filename = shift;
                    247:     my $Contents = shift;
                    248:     my $TempFile = $Filename.".tmp";
                    249: 
                    250:     #  Open the file for write:
                    251: 
                    252:     my $fh = IO::File->new("> $TempFile"); # Write to temp.
                    253:     if(!(defined $fh)) {
                    254: 	&logthis('<font color="red"> Unable to create '.$TempFile."</font>");
                    255: 	return 0;
                    256:     }
                    257:     #  write the contents of the file:
                    258: 
                    259:     print $fh ($Contents); 
                    260:     $fh->close;			# In case we ever have a filesystem w. locking
                    261: 
                    262:     chmod(0660, $TempFile);
                    263: 
                    264:     # Now we can move install the file in position.
                    265:     
                    266:     move($TempFile, $Filename);
                    267: 
                    268:     return 1;
                    269: }
                    270: 
                    271: #
1.141     foxr      272: #   PushFile:  Called to do an administrative push of a file.
                    273: #              - Ensure the file being pushed is one we support.
                    274: #              - Backup the old file to <filename.saved>
                    275: #              - Separate the contents of the new file out from the
                    276: #                rest of the request.
                    277: #              - Write the new file.
                    278: #  Parameter:
                    279: #     Request - The entire user request.  This consists of a : separated
                    280: #               string pushfile:tablename:contents.
                    281: #     NOTE:  The contents may have :'s in it as well making things a bit
                    282: #            more interesting... but not much.
                    283: #  Returns:
                    284: #     String to send to client ("ok" or "refused" if bad file).
                    285: #
                    286: sub PushFile {
                    287:     my $request = shift;    
                    288:     my ($command, $filename, $contents) = split(":", $request, 3);
                    289:     
                    290:     #  At this point in time, pushes for only the following tables are
                    291:     #  supported:
                    292:     #   hosts.tab  ($filename eq host).
                    293:     #   domain.tab ($filename eq domain).
                    294:     # Construct the destination filename or reject the request.
                    295:     #
                    296:     # lonManage is supposed to ensure this, however this session could be
                    297:     # part of some elaborate spoof that managed somehow to authenticate.
                    298:     #
                    299: 
                    300:     my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
                    301:     if ($filename eq "host") {
                    302: 	$tablefile .= "hosts.tab";
                    303:     } elsif ($filename eq "domain") {
                    304: 	$tablefile .= "domain.tab";
                    305:     } else {
                    306: 	return "refused";
                    307:     }
                    308:     #
                    309:     # >copy< the old table to the backup table
                    310:     #        don't rename in case system crashes/reboots etc. in the time
                    311:     #        window between a rename and write.
                    312:     #
                    313:     my $backupfile = $tablefile;
                    314:     $backupfile    =~ s/\.tab$/.old/;
1.143     foxr      315:     if(!CopyFile($tablefile, $backupfile)) {
                    316: 	&logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
                    317: 	return "error:$!";
                    318:     }
1.141     foxr      319:     &logthis('<font color="green"> Pushfile: backed up '
                    320: 	    .$tablefile." to $backupfile</font>");
                    321:     
                    322:     #  Install the new file:
                    323: 
1.143     foxr      324:     if(!InstallFile($tablefile, $contents)) {
                    325: 	&logthis('<font color="red"> Pushfile: unable to install '
1.145     foxr      326: 	 .$tablefile." $! </font>");
1.143     foxr      327: 	return "error:$!";
                    328:     }
                    329:     else {
                    330: 	&logthis('<font color="green"> Installed new '.$tablefile
                    331: 		 ."</font>");
                    332: 
                    333:     }
                    334: 
1.141     foxr      335: 
                    336:     #  Indicate success:
                    337:  
                    338:     return "ok";
                    339: 
                    340: }
1.145     foxr      341: 
                    342: #
                    343: #  Called to re-init either lonc or lond.
                    344: #
                    345: #  Parameters:
                    346: #    request   - The full request by the client.  This is of the form
                    347: #                reinit:<process>  
                    348: #                where <process> is allowed to be either of 
                    349: #                lonc or lond
                    350: #
                    351: #  Returns:
                    352: #     The string to be sent back to the client either:
                    353: #   ok         - Everything worked just fine.
                    354: #   error:why  - There was a failure and why describes the reason.
                    355: #
                    356: #
                    357: sub ReinitProcess {
                    358:     my $request = shift;
                    359: 
1.146     foxr      360: 
                    361:     # separate the request (reinit) from the process identifier and
                    362:     # validate it producing the name of the .pid file for the process.
                    363:     #
                    364:     #
                    365:     my ($junk, $process) = split(":", $request);
1.147     foxr      366:     my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146     foxr      367:     if($process eq 'lonc') {
                    368: 	$processpidfile = $processpidfile."lonc.pid";
1.147     foxr      369: 	if (!open(PIDFILE, "< $processpidfile")) {
                    370: 	    return "error:Open failed for $processpidfile";
                    371: 	}
                    372: 	my $loncpid = <PIDFILE>;
                    373: 	close(PIDFILE);
                    374: 	logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
                    375: 		."</font>");
                    376: 	kill("USR2", $loncpid);
1.146     foxr      377:     } elsif ($process eq 'lond') {
1.147     foxr      378: 	logthis('<font color="red"> Reinitializing self (lond) </font>');
                    379: 	&UpdateHosts;			# Lond is us!!
1.146     foxr      380:     } else {
                    381: 	&logthis('<font color="yellow" Invalid reinit request for '.$process
                    382: 		 ."</font>");
                    383: 	return "error:Invalid process identifier $process";
                    384:     }
1.145     foxr      385:     return 'ok';
                    386: }
                    387: 
1.141     foxr      388: #
1.96      foxr      389: #  Convert an error return code from lcpasswd to a string value.
                    390: #
                    391: sub lcpasswdstrerror {
                    392:     my $ErrorCode = shift;
1.97      foxr      393:     if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96      foxr      394: 	return "lcpasswd Unrecognized error return value ".$ErrorCode;
                    395:     } else {
1.98      foxr      396: 	return $passwderrors[$ErrorCode];
1.96      foxr      397:     }
                    398: }
                    399: 
1.97      foxr      400: #
                    401: # Convert an error return code from lcuseradd to a string value:
                    402: #
                    403: sub lcuseraddstrerror {
                    404:     my $ErrorCode = shift;
                    405:     if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
                    406: 	return "lcuseradd - Unrecognized error code: ".$ErrorCode;
                    407:     } else {
1.98      foxr      408: 	return $adderrors[$ErrorCode];
1.97      foxr      409:     }
                    410: }
                    411: 
1.23      harris41  412: # grabs exception and records it to log before exiting
                    413: sub catchexception {
1.27      albertel  414:     my ($error)=@_;
1.25      www       415:     $SIG{'QUIT'}='DEFAULT';
                    416:     $SIG{__DIE__}='DEFAULT';
1.23      harris41  417:     &logthis("<font color=red>CRITICAL: "
1.134     albertel  418:      ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27      albertel  419:      ."a crash with this error msg->[$error]</font>");
1.57      www       420:     &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27      albertel  421:     if ($client) { print $client "error: $error\n"; }
1.59      www       422:     $server->close();
1.27      albertel  423:     die($error);
1.23      harris41  424: }
                    425: 
1.63      www       426: sub timeout {
                    427:     &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
                    428:     &catchexception('Timeout');
                    429: }
1.22      harris41  430: # -------------------------------- Set signal handlers to record abnormal exits
                    431: 
                    432: $SIG{'QUIT'}=\&catchexception;
                    433: $SIG{__DIE__}=\&catchexception;
                    434: 
1.81      matthew   435: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95      harris41  436: &status("Read loncapa.conf and loncapa_apache.conf");
                    437: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141     foxr      438: %perlvar=%{$perlvarref};
1.80      harris41  439: undef $perlvarref;
1.19      www       440: 
1.35      harris41  441: # ----------------------------- Make sure this process is running from user=www
                    442: my $wwwid=getpwnam('www');
                    443: if ($wwwid!=$<) {
1.134     albertel  444:    my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
                    445:    my $subj="LON: $currenthostid User ID mismatch";
1.37      harris41  446:    system("echo 'User ID mismatch.  lond must be run as user www.' |\
1.35      harris41  447:  mailto $emailto -s '$subj' > /dev/null");
                    448:    exit 1;
                    449: }
                    450: 
1.19      www       451: # --------------------------------------------- Check if other instance running
                    452: 
                    453: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
                    454: 
                    455: if (-e $pidfile) {
                    456:    my $lfh=IO::File->new("$pidfile");
                    457:    my $pide=<$lfh>;
                    458:    chomp($pide);
1.29      harris41  459:    if (kill 0 => $pide) { die "already running"; }
1.19      www       460: }
1.1       albertel  461: 
                    462: # ------------------------------------------------------------- Read hosts file
                    463: 
                    464: 
                    465: 
                    466: # establish SERVER socket, bind and listen.
                    467: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
                    468:                                 Type      => SOCK_STREAM,
                    469:                                 Proto     => 'tcp',
                    470:                                 Reuse     => 1,
                    471:                                 Listen    => 10 )
1.29      harris41  472:   or die "making socket: $@\n";
1.1       albertel  473: 
                    474: # --------------------------------------------------------- Do global variables
                    475: 
                    476: # global variables
                    477: 
1.134     albertel  478: my %children               = ();       # keys are current child process IDs
                    479: my $children               = 0;        # current number of children
1.1       albertel  480: 
                    481: sub REAPER {                        # takes care of dead children
                    482:     $SIG{CHLD} = \&REAPER;
                    483:     my $pid = wait;
1.67      albertel  484:     if (defined($children{$pid})) {
                    485: 	&logthis("Child $pid died");
                    486: 	$children --;
                    487: 	delete $children{$pid};
                    488:     } else {
                    489: 	&logthis("Unknown Child $pid died");
                    490:     }
1.1       albertel  491: }
                    492: 
                    493: sub HUNTSMAN {                      # signal handler for SIGINT
                    494:     local($SIG{CHLD}) = 'IGNORE';   # we're going to kill our children
                    495:     kill 'INT' => keys %children;
1.59      www       496:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1       albertel  497:     my $execdir=$perlvar{'lonDaemons'};
                    498:     unlink("$execdir/logs/lond.pid");
1.9       www       499:     &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.1       albertel  500:     exit;                           # clean up with dignity
                    501: }
                    502: 
                    503: sub HUPSMAN {                      # signal handler for SIGHUP
                    504:     local($SIG{CHLD}) = 'IGNORE';  # we're going to kill our children
                    505:     kill 'INT' => keys %children;
1.59      www       506:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9       www       507:     &logthis("<font color=red>CRITICAL: Restarting</font>");
1.134     albertel  508:     my $execdir=$perlvar{'lonDaemons'};
1.30      harris41  509:     unlink("$execdir/logs/lond.pid");
1.1       albertel  510:     exec("$execdir/lond");         # here we go again
                    511: }
                    512: 
1.144     foxr      513: #
1.148     foxr      514: #    Kill off hashes that describe the host table prior to re-reading it.
                    515: #    Hashes affected are:
                    516: #       %hostid, %hostdom %hostip
                    517: #
                    518: sub KillHostHashes {
                    519:     foreach my $key (keys %hostid) {
                    520: 	delete $hostid{$key};
                    521:     }
                    522:     foreach my $key (keys %hostdom) {
                    523: 	delete $hostdom{$key};
                    524:     }
                    525:     foreach my $key (keys %hostip) {
                    526: 	delete $hostip{$key};
                    527:     }
                    528: }
                    529: #
                    530: #   Read in the host table from file and distribute it into the various hashes:
                    531: #
                    532: #    - %hostid  -  Indexed by IP, the loncapa hostname.
                    533: #    - %hostdom -  Indexed by  loncapa hostname, the domain.
                    534: #    - %hostip  -  Indexed by hostid, the Ip address of the host.
                    535: sub ReadHostTable {
                    536: 
                    537:     open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
                    538:     
                    539:     while (my $configline=<CONFIG>) {
                    540: 	my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
                    541: 	chomp($ip); $ip=~s/\D+$//;
                    542: 	$hostid{$ip}=$id;
                    543: 	$hostdom{$id}=$domain;
                    544: 	$hostip{$id}=$ip;
                    545: 	if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
                    546:     }
                    547:     close(CONFIG);
                    548: }
                    549: #
                    550: #  Reload the Apache daemon's state.
1.150     foxr      551: #  This is done by invoking /home/httpd/perl/apachereload
                    552: #  a setuid perl script that can be root for us to do this job.
1.148     foxr      553: #
                    554: sub ReloadApache {
1.150     foxr      555:     my $execdir = $perlvar{'lonDaemons'};
                    556:     my $script  = $execdir."/apachereload";
                    557:     system($script);
1.148     foxr      558: }
                    559: 
                    560: #
1.144     foxr      561: #   Called in response to a USR2 signal.
                    562: #   - Reread hosts.tab
                    563: #   - All children connected to hosts that were removed from hosts.tab
                    564: #     are killed via SIGINT
                    565: #   - All children connected to previously existing hosts are sent SIGUSR1
                    566: #   - Our internal hosts hash is updated to reflect the new contents of
                    567: #     hosts.tab causing connections from hosts added to hosts.tab to
                    568: #     now be honored.
                    569: #
                    570: sub UpdateHosts {
1.147     foxr      571:     logthis('<font color="blue"> Updating connections </font>');
1.148     foxr      572:     #
                    573:     #  The %children hash has the set of IP's we currently have children
                    574:     #  on.  These need to be matched against records in the hosts.tab
                    575:     #  Any ip's no longer in the table get killed off they correspond to
                    576:     #  either dropped or changed hosts.  Note that the re-read of the table
                    577:     #  will take care of new and changed hosts as connections come into being.
                    578: 
                    579: 
                    580:     KillHostHashes;
                    581:     ReadHostTable;
                    582: 
                    583:     foreach my $child (keys %children) {
                    584: 	my $childip = $children{$child};
                    585: 	if(!$hostid{$childip}) {
1.149     foxr      586: 	    logthis('<font color="blue"> UpdateHosts killing child '
                    587: 		    ." $child for ip $childip </font>");
1.148     foxr      588: 	    kill('INT', $child);
1.149     foxr      589: 	} else {
                    590: 	    logthis('<font color="green"> keeping child for ip '
                    591: 		    ." $childip (pid=$child) </font>");
1.148     foxr      592: 	}
                    593:     }
                    594:     ReloadApache;
1.144     foxr      595: }
                    596: 
1.148     foxr      597: 
1.57      www       598: sub checkchildren {
                    599:     &initnewstatus();
                    600:     &logstatus();
                    601:     &logthis('Going to check on the children');
1.134     albertel  602:     my $docdir=$perlvar{'lonDocRoot'};
1.61      harris41  603:     foreach (sort keys %children) {
1.57      www       604: 	sleep 1;
                    605:         unless (kill 'USR1' => $_) {
                    606: 	    &logthis ('Child '.$_.' is dead');
                    607:             &logstatus($$.' is dead');
                    608:         } 
1.61      harris41  609:     }
1.63      www       610:     sleep 5;
1.113     albertel  611:     $SIG{ALRM} = sub { die "timeout" };
                    612:     $SIG{__DIE__} = 'DEFAULT';
1.63      www       613:     foreach (sort keys %children) {
                    614:         unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113     albertel  615:           eval {
                    616:             alarm(300);
1.63      www       617: 	    &logthis('Child '.$_.' did not respond');
1.67      albertel  618: 	    kill 9 => $_;
1.131     albertel  619: 	    #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
                    620: 	    #$subj="LON: $currenthostid killed lond process $_";
                    621: 	    #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
                    622: 	    #$execdir=$perlvar{'lonDaemons'};
                    623: 	    #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.113     albertel  624: 	    alarm(0);
                    625: 	  }
1.63      www       626:         }
                    627:     }
1.113     albertel  628:     $SIG{ALRM} = 'DEFAULT';
1.152     www       629:     $SIG{__DIE__} = \&catchcexception;
1.57      www       630: }
                    631: 
1.1       albertel  632: # --------------------------------------------------------------------- Logging
                    633: 
                    634: sub logthis {
                    635:     my $message=shift;
                    636:     my $execdir=$perlvar{'lonDaemons'};
                    637:     my $fh=IO::File->new(">>$execdir/logs/lond.log");
                    638:     my $now=time;
                    639:     my $local=localtime($now);
1.58      www       640:     $lastlog=$local.': '.$message;
1.1       albertel  641:     print $fh "$local ($$): $message\n";
                    642: }
                    643: 
1.77      foxr      644: # ------------------------- Conditional log if $DEBUG true.
                    645: sub Debug {
                    646:     my $message = shift;
                    647:     if($DEBUG) {
                    648: 	&logthis($message);
                    649:     }
                    650: }
1.57      www       651: # ------------------------------------------------------------------ Log status
                    652: 
                    653: sub logstatus {
                    654:     my $docdir=$perlvar{'lonDocRoot'};
1.63      www       655:     {
1.57      www       656:     my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
1.115     albertel  657:     print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
1.63      www       658:     $fh->close();
                    659:     }
                    660:     {
                    661: 	my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
                    662:         print $fh $status."\n".$lastlog."\n".time;
                    663:         $fh->close();
                    664:     }
1.57      www       665: }
                    666: 
                    667: sub initnewstatus {
                    668:     my $docdir=$perlvar{'lonDocRoot'};
                    669:     my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
                    670:     my $now=time;
                    671:     my $local=localtime($now);
                    672:     print $fh "LOND status $local - parent $$\n\n";
1.64      www       673:     opendir(DIR,"$docdir/lon-status/londchld");
1.134     albertel  674:     while (my $filename=readdir(DIR)) {
1.64      www       675:         unlink("$docdir/lon-status/londchld/$filename");
                    676:     }
                    677:     closedir(DIR);
1.57      www       678: }
                    679: 
                    680: # -------------------------------------------------------------- Status setting
                    681: 
                    682: sub status {
                    683:     my $what=shift;
                    684:     my $now=time;
                    685:     my $local=localtime($now);
                    686:     $status=$local.': '.$what;
1.103     www       687:     $0='lond: '.$what.' '.$local;
1.57      www       688: }
1.11      www       689: 
                    690: # -------------------------------------------------------- Escape Special Chars
                    691: 
                    692: sub escape {
                    693:     my $str=shift;
                    694:     $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
                    695:     return $str;
                    696: }
                    697: 
                    698: # ----------------------------------------------------- Un-Escape Special Chars
                    699: 
                    700: sub unescape {
                    701:     my $str=shift;
                    702:     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
                    703:     return $str;
                    704: }
                    705: 
1.1       albertel  706: # ----------------------------------------------------------- Send USR1 to lonc
                    707: 
                    708: sub reconlonc {
                    709:     my $peerfile=shift;
                    710:     &logthis("Trying to reconnect for $peerfile");
                    711:     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
                    712:     if (my $fh=IO::File->new("$loncfile")) {
                    713: 	my $loncpid=<$fh>;
                    714:         chomp($loncpid);
                    715:         if (kill 0 => $loncpid) {
                    716: 	    &logthis("lonc at pid $loncpid responding, sending USR1");
                    717:             kill USR1 => $loncpid;
                    718:         } else {
1.9       www       719: 	    &logthis(
                    720:               "<font color=red>CRITICAL: "
                    721:              ."lonc at pid $loncpid not responding, giving up</font>");
1.1       albertel  722:         }
                    723:     } else {
1.9       www       724:       &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1       albertel  725:     }
                    726: }
                    727: 
                    728: # -------------------------------------------------- Non-critical communication
1.11      www       729: 
1.1       albertel  730: sub subreply {
                    731:     my ($cmd,$server)=@_;
                    732:     my $peerfile="$perlvar{'lonSockDir'}/$server";
                    733:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                    734:                                       Type    => SOCK_STREAM,
                    735:                                       Timeout => 10)
                    736:        or return "con_lost";
                    737:     print $sclient "$cmd\n";
                    738:     my $answer=<$sclient>;
                    739:     chomp($answer);
                    740:     if (!$answer) { $answer="con_lost"; }
                    741:     return $answer;
                    742: }
                    743: 
                    744: sub reply {
                    745:   my ($cmd,$server)=@_;
                    746:   my $answer;
1.115     albertel  747:   if ($server ne $currenthostid) { 
1.1       albertel  748:     $answer=subreply($cmd,$server);
                    749:     if ($answer eq 'con_lost') {
                    750: 	$answer=subreply("ping",$server);
                    751:         if ($answer ne $server) {
1.115     albertel  752: 	    &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1       albertel  753:            &reconlonc("$perlvar{'lonSockDir'}/$server");
                    754:         }
                    755:         $answer=subreply($cmd,$server);
                    756:     }
                    757:   } else {
                    758:     $answer='self_reply';
                    759:   } 
                    760:   return $answer;
                    761: }
                    762: 
1.13      www       763: # -------------------------------------------------------------- Talk to lonsql
                    764: 
1.12      harris41  765: sub sqlreply {
                    766:     my ($cmd)=@_;
                    767:     my $answer=subsqlreply($cmd);
                    768:     if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
                    769:     return $answer;
                    770: }
                    771: 
                    772: sub subsqlreply {
                    773:     my ($cmd)=@_;
                    774:     my $unixsock="mysqlsock";
                    775:     my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
                    776:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                    777:                                       Type    => SOCK_STREAM,
                    778:                                       Timeout => 10)
                    779:        or return "con_lost";
                    780:     print $sclient "$cmd\n";
                    781:     my $answer=<$sclient>;
                    782:     chomp($answer);
                    783:     if (!$answer) { $answer="con_lost"; }
                    784:     return $answer;
                    785: }
                    786: 
1.1       albertel  787: # -------------------------------------------- Return path to profile directory
1.11      www       788: 
1.1       albertel  789: sub propath {
                    790:     my ($udom,$uname)=@_;
                    791:     $udom=~s/\W//g;
                    792:     $uname=~s/\W//g;
1.16      www       793:     my $subdir=$uname.'__';
1.1       albertel  794:     $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
                    795:     my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
                    796:     return $proname;
                    797: } 
                    798: 
                    799: # --------------------------------------- Is this the home server of an author?
1.11      www       800: 
1.1       albertel  801: sub ishome {
                    802:     my $author=shift;
                    803:     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
                    804:     my ($udom,$uname)=split(/\//,$author);
                    805:     my $proname=propath($udom,$uname);
                    806:     if (-e $proname) {
                    807: 	return 'owner';
                    808:     } else {
                    809:         return 'not_owner';
                    810:     }
                    811: }
                    812: 
                    813: # ======================================================= Continue main program
                    814: # ---------------------------------------------------- Fork once and dissociate
                    815: 
1.134     albertel  816: my $fpid=fork;
1.1       albertel  817: exit if $fpid;
1.29      harris41  818: die "Couldn't fork: $!" unless defined ($fpid);
1.1       albertel  819: 
1.29      harris41  820: POSIX::setsid() or die "Can't start new session: $!";
1.1       albertel  821: 
                    822: # ------------------------------------------------------- Write our PID on disk
                    823: 
1.134     albertel  824: my $execdir=$perlvar{'lonDaemons'};
1.1       albertel  825: open (PIDSAVE,">$execdir/logs/lond.pid");
                    826: print PIDSAVE "$$\n";
                    827: close(PIDSAVE);
1.9       www       828: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57      www       829: &status('Starting');
1.1       albertel  830: 
1.106     foxr      831: 
1.1       albertel  832: 
                    833: # ----------------------------------------------------- Install signal handlers
                    834: 
1.57      www       835: 
1.1       albertel  836: $SIG{CHLD} = \&REAPER;
                    837: $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                    838: $SIG{HUP}  = \&HUPSMAN;
1.57      www       839: $SIG{USR1} = \&checkchildren;
1.144     foxr      840: $SIG{USR2} = \&UpdateHosts;
1.106     foxr      841: 
1.148     foxr      842: #  Read the host hashes:
                    843: 
                    844: ReadHostTable;
1.106     foxr      845: 
                    846: # --------------------------------------------------------------
                    847: #   Accept connections.  When a connection comes in, it is validated
                    848: #   and if good, a child process is created to process transactions
                    849: #   along the connection.
                    850: 
1.1       albertel  851: while (1) {
1.106     foxr      852:     $client = $server->accept() or next;
                    853:     make_new_child($client);
1.1       albertel  854: }
                    855: 
                    856: sub make_new_child {
                    857:     my $pid;
                    858:     my $cipher;
                    859:     my $sigset;
1.106     foxr      860: 
                    861:     $client = shift;
1.1       albertel  862:     &logthis("Attempting to start child");    
                    863:     # block signal for fork
                    864:     $sigset = POSIX::SigSet->new(SIGINT);
                    865:     sigprocmask(SIG_BLOCK, $sigset)
1.29      harris41  866:         or die "Can't block SIGINT for fork: $!\n";
1.134     albertel  867: 
1.29      harris41  868:     die "fork: $!" unless defined ($pid = fork);
1.148     foxr      869: 
                    870:     $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
                    871: 	                               # connection liveness.
                    872: 
                    873:     #
                    874:     #  Figure out who we're talking to so we can record the peer in 
                    875:     #  the pid hash.
                    876:     #
                    877:     my $caller = getpeername($client);
                    878:     my ($port,$iaddr)=unpack_sockaddr_in($caller);
                    879:     $clientip=inet_ntoa($iaddr);
1.1       albertel  880:     
                    881:     if ($pid) {
                    882:         # Parent records the child's birth and returns.
                    883:         sigprocmask(SIG_UNBLOCK, $sigset)
1.29      harris41  884:             or die "Can't unblock SIGINT for fork: $!\n";
1.148     foxr      885:         $children{$pid} = $clientip;
1.1       albertel  886:         $children++;
1.57      www       887:         &status('Started child '.$pid);
1.1       albertel  888:         return;
                    889:     } else {
                    890:         # Child can *not* return from this subroutine.
                    891:         $SIG{INT} = 'DEFAULT';      # make SIGINT kill us as it did before
1.126     albertel  892:         $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns 
                    893:                                 #don't get intercepted
1.57      www       894:         $SIG{USR1}= \&logstatus;
1.63      www       895:         $SIG{ALRM}= \&timeout;
1.57      www       896:         $lastlog='Forked ';
                    897:         $status='Forked';
                    898: 
1.1       albertel  899:         # unblock signals
                    900:         sigprocmask(SIG_UNBLOCK, $sigset)
1.29      harris41  901:             or die "Can't unblock SIGINT for fork: $!\n";
1.13      www       902: 
1.134     albertel  903:         my $tmpsnum=0;
1.91      albertel  904: #---------------------------------------------------- kerberos 5 initialization
                    905:         &Authen::Krb5::init_context();
                    906:         &Authen::Krb5::init_ets();
                    907: 
1.57      www       908:             &status('Accepted connection');
1.1       albertel  909: # =============================================================================
                    910:             # do something with the connection
                    911: # -----------------------------------------------------------------------------
1.148     foxr      912: 	# see if we know client and check for spoof IP by challenge
                    913: 
1.1       albertel  914:             my $clientrec=($hostid{$clientip} ne undef);
1.9       www       915:             &logthis(
1.115     albertel  916: "<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
1.51      www       917:             );
1.57      www       918:             &status("Connecting $clientip ($hostid{$clientip})"); 
1.2       www       919:             my $clientok;
1.1       albertel  920:             if ($clientrec) {
1.57      www       921: 	      &status("Waiting for init from $clientip ($hostid{$clientip})");
1.2       www       922: 	      my $remotereq=<$client>;
1.115     albertel  923:               $remotereq=~s/[^\w:]//g;
                    924:               if ($remotereq =~ /^init/) {
1.121     albertel  925: 		  &sethost("sethost:$perlvar{'lonHostID'}");
1.2       www       926: 		  my $challenge="$$".time;
                    927:                   print $client "$challenge\n";
1.57      www       928:                   &status(
                    929:            "Waiting for challenge reply from $clientip ($hostid{$clientip})"); 
1.2       www       930:                   $remotereq=<$client>;
                    931:                   $remotereq=~s/\W//g;
                    932:                   if ($challenge eq $remotereq) {
                    933: 		      $clientok=1;
                    934:                       print $client "ok\n";
                    935:                   } else {
1.9       www       936: 		      &logthis(
                    937:  "<font color=blue>WARNING: $clientip did not reply challenge</font>");
1.57      www       938:                       &status('No challenge reply '.$clientip);
1.2       www       939:                   }
                    940:               } else {
1.9       www       941: 		  &logthis(
                    942:                     "<font color=blue>WARNING: "
                    943:                    ."$clientip failed to initialize: >$remotereq< </font>");
1.57      www       944:                   &status('No init '.$clientip);
1.2       www       945:               }
                    946: 	    } else {
1.9       www       947:               &logthis(
                    948:  "<font color=blue>WARNING: Unknown client $clientip</font>");
1.57      www       949:               &status('Hung up on '.$clientip);
1.2       www       950:             }
                    951:             if ($clientok) {
1.1       albertel  952: # ---------------- New known client connecting, could mean machine online again
1.75      foxr      953: 
1.115     albertel  954: 		foreach my $id (keys(%hostip)) {
                    955: 		    if ($hostip{$id} ne $clientip ||
                    956: 		       $hostip{$currenthostid} eq $clientip) {
                    957: 			# no need to try to do recon's to myself
                    958: 			next;
                    959: 		    }
                    960: 		    &reconlonc("$perlvar{'lonSockDir'}/$id");
                    961: 		}
                    962: 		&logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
1.58      www       963:               &status('Will listen to '.$hostid{$clientip});
1.1       albertel  964: # ------------------------------------------------------------ Process requests
                    965:               while (my $userinput=<$client>) {
                    966:                 chomp($userinput);
1.79      foxr      967: 		Debug("Request = $userinput\n");
1.57      www       968:                 &status('Processing '.$hostid{$clientip}.': '.$userinput);
1.1       albertel  969:                 my $wasenc=0;
1.63      www       970:                 alarm(120);
1.1       albertel  971: # ------------------------------------------------------------ See if encrypted
                    972: 		if ($userinput =~ /^enc/) {
                    973: 		  if ($cipher) {
                    974:                     my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
                    975: 		    $userinput='';
                    976:                     for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
                    977:                        $userinput.=
                    978: 			   $cipher->decrypt(
                    979:                             pack("H16",substr($encinput,$encidx,16))
                    980:                            );
                    981: 		    }
                    982: 		    $userinput=substr($userinput,0,$cmdlength);
                    983:                     $wasenc=1;
                    984: 		}
1.75      foxr      985: 	      }
                    986: 	  
1.1       albertel  987: # ------------------------------------------------------------- Normal commands
                    988: # ------------------------------------------------------------------------ ping
                    989: 		   if ($userinput =~ /^ping/) {
1.115     albertel  990:                        print $client "$currenthostid\n";
1.1       albertel  991: # ------------------------------------------------------------------------ pong
1.137     foxr      992: 		   }elsif ($userinput =~ /^pong/) {
1.134     albertel  993:                        my $reply=&reply("ping",$hostid{$clientip});
1.115     albertel  994:                        print $client "$currenthostid:$reply\n"; 
1.1       albertel  995: # ------------------------------------------------------------------------ ekey
                    996: 		   } elsif ($userinput =~ /^ekey/) {
                    997:                        my $buildkey=time.$$.int(rand 100000);
                    998:                        $buildkey=~tr/1-6/A-F/;
                    999:                        $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1.115     albertel 1000:                        my $key=$currenthostid.$hostid{$clientip};
1.1       albertel 1001:                        $key=~tr/a-z/A-Z/;
                   1002:                        $key=~tr/G-P/0-9/;
                   1003:                        $key=~tr/Q-Z/0-9/;
                   1004:                        $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
                   1005:                        $key=substr($key,0,32);
                   1006:                        my $cipherkey=pack("H32",$key);
                   1007:                        $cipher=new IDEA $cipherkey;
                   1008:                        print $client "$buildkey\n"; 
                   1009: # ------------------------------------------------------------------------ load
                   1010: 		   } elsif ($userinput =~ /^load/) {
                   1011:                        my $loadavg;
                   1012:                        {
                   1013:                           my $loadfile=IO::File->new('/proc/loadavg');
                   1014:                           $loadavg=<$loadfile>;
                   1015:                        }
                   1016:                        $loadavg =~ s/\s.*//g;
1.127     albertel 1017: 		       my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1.1       albertel 1018: 		       print $client "$loadpercent\n";
1.127     albertel 1019: # -------------------------------------------------------------------- userload
                   1020: 		   } elsif ($userinput =~ /^userload/) {
                   1021: 		       my $userloadpercent=&userload();
                   1022: 		       print $client "$userloadpercent\n";
1.137     foxr     1023: 
                   1024: #
                   1025: #        Transactions requiring encryption:
                   1026: #
1.54      harris41 1027: # ----------------------------------------------------------------- currentauth
                   1028: 		   } elsif ($userinput =~ /^currentauth/) {
                   1029: 		     if ($wasenc==1) {
                   1030:                        my ($cmd,$udom,$uname)=split(/:/,$userinput);
1.79      foxr     1031: 		       my $result = GetAuthType($udom, $uname);
1.78      foxr     1032: 		       if($result eq "nouser") {
                   1033: 			   print $client "unknown_user\n";
                   1034: 		       }
                   1035: 		       else {
                   1036: 			   print $client "$result\n"
                   1037: 		       }
1.54      harris41 1038: 		     } else {
                   1039: 		       print $client "refused\n";
                   1040: 		     }
1.137     foxr     1041: #--------------------------------------------------------------------- pushfile
                   1042: 		   } elsif($userinput =~ /^pushfile/) { 
1.140     foxr     1043: 		       if($wasenc == 1) {
                   1044: 			   my $cert = GetCertificate($userinput);
                   1045: 			   if(ValidManager($cert)) {
1.141     foxr     1046: 			       my $reply = PushFile($userinput);
                   1047: 			       print $client "$reply\n";
1.140     foxr     1048: 			   } else {
                   1049: 			       print $client "refused\n";
                   1050: 			   } 
                   1051: 		       } else {
                   1052: 			   print $client "refused\n";
                   1053: 		       }
1.137     foxr     1054: #--------------------------------------------------------------------- reinit
                   1055: 		   } elsif($userinput =~ /^reinit/) {
1.140     foxr     1056: 		       if ($wasenc == 1) {
                   1057: 			   my $cert = GetCertificate($userinput);
                   1058: 			   if(ValidManager($cert)) {
1.146     foxr     1059: 			       chomp($userinput);
1.145     foxr     1060: 			       my $reply = ReinitProcess($userinput);
                   1061: 			       print $client  "$reply\n";
1.140     foxr     1062: 			   } else {
                   1063: 			       print $client "refused\n";
                   1064: 			   }
                   1065: 		       } else {
                   1066: 			   print $client "refused\n";
                   1067: 		       }
1.1       albertel 1068: # ------------------------------------------------------------------------ auth
                   1069:                    } elsif ($userinput =~ /^auth/) {
                   1070: 		     if ($wasenc==1) {
                   1071:                        my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
                   1072:                        chomp($upass);
1.11      www      1073:                        $upass=unescape($upass);
1.1       albertel 1074:                        my $proname=propath($udom,$uname);
                   1075:                        my $passfilename="$proname/passwd";
                   1076:                        if (-e $passfilename) {
                   1077:                           my $pf = IO::File->new($passfilename);
                   1078:                           my $realpasswd=<$pf>;
                   1079:                           chomp($realpasswd);
1.2       www      1080:                           my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
                   1081:                           my $pwdcorrect=0;
                   1082:                           if ($howpwd eq 'internal') {
1.99      foxr     1083: 			      &Debug("Internal auth");
1.2       www      1084: 			      $pwdcorrect=
                   1085: 				  (crypt($upass,$contentpwd) eq $contentpwd);
                   1086:                           } elsif ($howpwd eq 'unix') {
1.99      foxr     1087: 			      &Debug("Unix auth");
                   1088:                               if((getpwnam($uname))[1] eq "") { #no such user!
                   1089: 				  $pwdcorrect = 0;
                   1090: 			      } else {
                   1091: 				  $contentpwd=(getpwnam($uname))[1];
                   1092: 				  my $pwauth_path="/usr/local/sbin/pwauth";
                   1093: 				  unless ($contentpwd eq 'x') {
                   1094: 				      $pwdcorrect=
                   1095: 					  (crypt($upass,$contentpwd) eq 
                   1096: 					   $contentpwd);
                   1097: 				  }
                   1098: 		  
1.52      harris41 1099: 			      elsif (-e $pwauth_path) {
                   1100: 				  open PWAUTH, "|$pwauth_path" or
                   1101: 				      die "Cannot invoke authentication";
                   1102: 				  print PWAUTH "$uname\n$upass\n";
                   1103: 				  close PWAUTH;
                   1104: 				  $pwdcorrect=!$?;
1.99      foxr     1105: 			      }
1.52      harris41 1106: 			      }
1.3       www      1107:                           } elsif ($howpwd eq 'krb4') {
1.134     albertel 1108:                               my $null=pack("C",0);
1.104     matthew  1109:                               unless ($upass=~/$null/) {
                   1110:                                   my $krb4_error = &Authen::Krb4::get_pw_in_tkt
                   1111:                                       ($uname,"",$contentpwd,'krbtgt',
                   1112:                                        $contentpwd,1,$upass);
                   1113:                                   if (!$krb4_error) {
                   1114:                                       $pwdcorrect = 1;
                   1115:                                   } else { 
                   1116:                                       $pwdcorrect=0; 
                   1117:                                       # log error if it is not a bad password
                   1118:                                       if ($krb4_error != 62) {
                   1119:        &logthis('krb4:'.$uname.','.$contentpwd.','.
                   1120:                 &Authen::Krb4::get_err_txt($Authen::Krb4::error));
                   1121:                                       }
                   1122:                                   }
                   1123:                               }
1.91      albertel 1124:                           } elsif ($howpwd eq 'krb5') {
1.134     albertel 1125: 			      my $null=pack("C",0);
1.91      albertel 1126: 			      unless ($upass=~/$null/) {
                   1127: 				  my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
                   1128: 				  my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
                   1129: 				  my $krbserver=&Authen::Krb5::parse_name($krbservice);
                   1130: 				  my $credentials=&Authen::Krb5::cc_default();
                   1131: 				  $credentials->initialize($krbclient);
                   1132: 				  my $krbreturn = 
                   1133: 				    &Authen::Krb5::get_in_tkt_with_password(
                   1134: 				     $krbclient,$krbserver,$upass,$credentials);
1.92      albertel 1135: #				  unless ($krbreturn) {
                   1136: #				      &logthis("Krb5 Error: ".
                   1137: #					       &Authen::Krb5::error());
                   1138: #				  }
1.91      albertel 1139: 				  $pwdcorrect = ($krbreturn == 1);
                   1140: 			   } else { $pwdcorrect=0; }
1.50      albertel 1141:                           } elsif ($howpwd eq 'localauth') {
1.49      albertel 1142: 			    $pwdcorrect=&localauth::localauth($uname,$upass,
                   1143: 							      $contentpwd);
                   1144: 			  }
1.2       www      1145:                           if ($pwdcorrect) {
1.1       albertel 1146:                              print $client "authorized\n";
                   1147:                           } else {
                   1148:                              print $client "non_authorized\n";
                   1149:                           }  
                   1150: 		       } else {
                   1151:                           print $client "unknown_user\n";
                   1152:                        }
                   1153: 		     } else {
                   1154: 		       print $client "refused\n";
                   1155: 		     }
                   1156: # ---------------------------------------------------------------------- passwd
                   1157:                    } elsif ($userinput =~ /^passwd/) {
                   1158: 		     if ($wasenc==1) {
                   1159:                        my 
                   1160:                        ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
                   1161:                        chomp($npass);
1.32      www      1162:                        $upass=&unescape($upass);
                   1163:                        $npass=&unescape($npass);
1.98      foxr     1164: 		       &Debug("Trying to change password for $uname");
1.72      matthew  1165: 		       my $proname=propath($udom,$uname);
1.1       albertel 1166:                        my $passfilename="$proname/passwd";
                   1167:                        if (-e $passfilename) {
                   1168: 			   my $realpasswd;
                   1169:                           { my $pf = IO::File->new($passfilename);
                   1170: 			    $realpasswd=<$pf>; }
                   1171:                           chomp($realpasswd);
1.2       www      1172:                           my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
                   1173:                           if ($howpwd eq 'internal') {
1.98      foxr     1174: 			   &Debug("internal auth");
1.2       www      1175: 			   if (crypt($upass,$contentpwd) eq $contentpwd) {
                   1176: 			     my $salt=time;
                   1177:                              $salt=substr($salt,6,2);
                   1178: 			     my $ncpass=crypt($npass,$salt);
1.139     albertel 1179:                              {
                   1180: 				 my $pf;
                   1181: 				 if ($pf = IO::File->new(">$passfilename")) {
                   1182: 				     print $pf "internal:$ncpass\n";
                   1183: 				     &logthis("Result of password change for $uname: pwchange_success");
                   1184: 				     print $client "ok\n";
                   1185: 				 } else {
                   1186: 				     &logthis("Unable to open $uname passwd to change password");
                   1187: 				     print $client "non_authorized\n";
                   1188: 				 }
                   1189: 			     }             
                   1190: 			     
1.2       www      1191:                            } else {
                   1192:                              print $client "non_authorized\n";
                   1193:                            }
1.72      matthew  1194:                           } elsif ($howpwd eq 'unix') {
                   1195: 			      # Unix means we have to access /etc/password
                   1196: 			      # one way or another.
                   1197: 			      # First: Make sure the current password is
                   1198: 			      #        correct
1.98      foxr     1199: 			      &Debug("auth is unix");
1.72      matthew  1200: 			      $contentpwd=(getpwnam($uname))[1];
                   1201: 			      my $pwdcorrect = "0";
                   1202: 			      my $pwauth_path="/usr/local/sbin/pwauth";
                   1203: 			      unless ($contentpwd eq 'x') {
                   1204: 				  $pwdcorrect=
                   1205:                                     (crypt($upass,$contentpwd) eq $contentpwd);
                   1206: 			      } elsif (-e $pwauth_path) {
                   1207: 				  open PWAUTH, "|$pwauth_path" or
                   1208: 				      die "Cannot invoke authentication";
                   1209: 				  print PWAUTH "$uname\n$upass\n";
                   1210: 				  close PWAUTH;
1.98      foxr     1211: 				  &Debug("exited pwauth with $? ($uname,$upass) ");
                   1212: 				  $pwdcorrect=($? == 0);
1.72      matthew  1213: 			      }
                   1214: 			     if ($pwdcorrect) {
                   1215: 				 my $execdir=$perlvar{'lonDaemons'};
1.98      foxr     1216: 				 &Debug("Opening lcpasswd pipeline");
1.132     matthew  1217: 				 my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1.72      matthew  1218: 				 print $pf "$uname\n$npass\n$npass\n";
                   1219: 				 close $pf;
1.97      foxr     1220: 				 my $err = $?;
                   1221: 				 my $result = ($err>0 ? 'pwchange_failure' 
1.72      matthew  1222: 					       : 'ok');
1.96      foxr     1223: 				 &logthis("Result of password change for $uname: ".
                   1224: 					  &lcpasswdstrerror($?));
1.72      matthew  1225: 				 print $client "$result\n";
                   1226: 			     } else {
                   1227: 				 print $client "non_authorized\n";
                   1228: 			     }
                   1229: 			  } else {
1.2       www      1230:                             print $client "auth_mode_error\n";
1.1       albertel 1231:                           }  
                   1232: 		       } else {
                   1233:                           print $client "unknown_user\n";
1.31      www      1234:                        }
                   1235: 		     } else {
                   1236: 		       print $client "refused\n";
                   1237: 		     }
                   1238: # -------------------------------------------------------------------- makeuser
                   1239:                    } elsif ($userinput =~ /^makeuser/) {
1.91      albertel 1240: 		     &Debug("Make user received");
1.56      harris41 1241:     	             my $oldumask=umask(0077);
1.31      www      1242: 		     if ($wasenc==1) {
                   1243:                        my 
                   1244:                        ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1.77      foxr     1245: 		       &Debug("cmd =".$cmd." $udom =".$udom.
                   1246: 				    " uname=".$uname);
1.31      www      1247:                        chomp($npass);
1.32      www      1248:                        $npass=&unescape($npass);
1.31      www      1249:                        my $proname=propath($udom,$uname);
                   1250:                        my $passfilename="$proname/passwd";
1.77      foxr     1251: 		       &Debug("Password file created will be:".
                   1252: 				    $passfilename);
1.31      www      1253:                        if (-e $passfilename) {
                   1254: 			   print $client "already_exists\n";
1.115     albertel 1255:                        } elsif ($udom ne $currentdomainid) {
1.31      www      1256:                            print $client "not_right_domain\n";
                   1257:                        } else {
1.134     albertel 1258:                            my @fpparts=split(/\//,$proname);
                   1259:                            my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
                   1260:                            my $fperror='';
                   1261:                            for (my $i=3;$i<=$#fpparts;$i++) {
1.31      www      1262:                                $fpnow.='/'.$fpparts[$i]; 
                   1263:                                unless (-e $fpnow) {
                   1264: 				   unless (mkdir($fpnow,0777)) {
1.109     foxr     1265:                                       $fperror="error: ".($!+0)
1.111     matthew  1266: 					  ." mkdir failed while attempting "
                   1267:                                               ."makeuser\n";
1.31      www      1268:                                    }
                   1269:                                }
                   1270:                            }
                   1271:                            unless ($fperror) {
1.98      foxr     1272: 			       my $result=&make_passwd_file($uname, $umode,$npass,
1.91      albertel 1273: 							    $passfilename);
                   1274: 			       print $client $result;
1.31      www      1275:                            } else {
                   1276:                                print $client "$fperror\n";
                   1277:                            }
1.55      harris41 1278:                        }
                   1279: 		     } else {
                   1280: 		       print $client "refused\n";
                   1281: 		     }
1.56      harris41 1282: 		     umask($oldumask);
1.55      harris41 1283: # -------------------------------------------------------------- changeuserauth
                   1284:                    } elsif ($userinput =~ /^changeuserauth/) {
1.77      foxr     1285: 		       &Debug("Changing authorization");
                   1286: 		      if ($wasenc==1) {
1.55      harris41 1287:                        my 
1.91      albertel 1288: 		       ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1.55      harris41 1289:                        chomp($npass);
1.77      foxr     1290: 		       &Debug("cmd = ".$cmd." domain= ".$udom.
                   1291: 			      "uname =".$uname." umode= ".$umode);
1.55      harris41 1292:                        $npass=&unescape($npass);
1.91      albertel 1293:                        my $proname=&propath($udom,$uname);
1.55      harris41 1294:                        my $passfilename="$proname/passwd";
1.115     albertel 1295: 		       if ($udom ne $currentdomainid) {
1.55      harris41 1296:                            print $client "not_right_domain\n";
                   1297:                        } else {
1.98      foxr     1298: 			   my $result=&make_passwd_file($uname, $umode,$npass,
1.93      albertel 1299: 							$passfilename);
1.91      albertel 1300: 			   print $client $result;
1.1       albertel 1301:                        }
                   1302: 		     } else {
                   1303: 		       print $client "refused\n";
                   1304: 		     }
                   1305: # ------------------------------------------------------------------------ home
                   1306:                    } elsif ($userinput =~ /^home/) {
                   1307:                        my ($cmd,$udom,$uname)=split(/:/,$userinput);
                   1308:                        chomp($uname);
                   1309:                        my $proname=propath($udom,$uname);
                   1310:                        if (-e $proname) {
                   1311:                           print $client "found\n";
                   1312:                        } else {
                   1313: 			  print $client "not_found\n";
                   1314:                        }
                   1315: # ---------------------------------------------------------------------- update
                   1316:                    } elsif ($userinput =~ /^update/) {
                   1317:                        my ($cmd,$fname)=split(/:/,$userinput);
                   1318:                        my $ownership=ishome($fname);
                   1319:                        if ($ownership eq 'not_owner') {
                   1320:                         if (-e $fname) {
                   1321:                           my ($dev,$ino,$mode,$nlink,
                   1322:                               $uid,$gid,$rdev,$size,
                   1323:                               $atime,$mtime,$ctime,
                   1324:                               $blksize,$blocks)=stat($fname);
1.134     albertel 1325:                           my $now=time;
                   1326:                           my $since=$now-$atime;
1.1       albertel 1327:                           if ($since>$perlvar{'lonExpire'}) {
1.134     albertel 1328:                               my $reply=
                   1329:                                     &reply("unsub:$fname","$hostid{$clientip}");
1.1       albertel 1330:                               unlink("$fname");
                   1331:                           } else {
                   1332: 			     my $transname="$fname.in.transfer";
                   1333:                              my $remoteurl=
                   1334:                                     reply("sub:$fname","$hostid{$clientip}");
                   1335:                              my $response;
                   1336:                               {
                   1337:                              my $ua=new LWP::UserAgent;
                   1338:                              my $request=new HTTP::Request('GET',"$remoteurl");
                   1339:                              $response=$ua->request($request,$transname);
                   1340: 			      }
                   1341:                              if ($response->is_error()) {
1.24      albertel 1342: 				 unlink($transname);
1.1       albertel 1343:                                  my $message=$response->status_line;
                   1344:                                  &logthis(
                   1345:                                   "LWP GET: $message for $fname ($remoteurl)");
                   1346:                              } else {
1.14      www      1347: 	                         if ($remoteurl!~/\.meta$/) {
1.28      www      1348:                                   my $ua=new LWP::UserAgent;
1.14      www      1349:                                   my $mrequest=
                   1350:                                    new HTTP::Request('GET',$remoteurl.'.meta');
                   1351:                                   my $mresponse=
                   1352:                                    $ua->request($mrequest,$fname.'.meta');
                   1353:                                   if ($mresponse->is_error()) {
                   1354: 		                    unlink($fname.'.meta');
                   1355:                                   }
                   1356: 	                         }
1.1       albertel 1357:                                  rename($transname,$fname);
                   1358: 			     }
                   1359:                           }
                   1360:                           print $client "ok\n";
                   1361:                         } else {
                   1362:                           print $client "not_found\n";
                   1363:                         }
                   1364: 		       } else {
                   1365: 			print $client "rejected\n";
                   1366:                        }
1.85      www      1367: # -------------------------------------- fetch a user file from a remote server
                   1368:                    } elsif ($userinput =~ /^fetchuserfile/) {
1.151     albertel 1369: 		       my ($cmd,$fname)=split(/:/,$userinput);
                   1370: 		       my ($udom,$uname,$ufile)=split(/\//,$fname);
                   1371: 		       my $udir=propath($udom,$uname).'/userfiles';
                   1372: 		       unless (-e $udir) { mkdir($udir,0770); }
1.86      www      1373:                        if (-e $udir) {
1.151     albertel 1374: 			   $ufile=~s/^[\.\~]+//;
                   1375: 			   $ufile=~s/\///g;
                   1376: 			   my $destname=$udir.'/'.$ufile;
                   1377: 			   my $transname=$udir.'/'.$ufile.'.in.transit';
                   1378: 			   my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
                   1379: 			   my $response;
                   1380: 			   {
                   1381: 			       my $ua=new LWP::UserAgent;
                   1382: 			       my $request=new HTTP::Request('GET',"$remoteurl");
                   1383: 			       $response=$ua->request($request,$transname);
                   1384: 			   }
                   1385: 			   if ($response->is_error()) {
                   1386: 			       unlink($transname);
                   1387: 			       my $message=$response->status_line;
                   1388: 			       &logthis("LWP GET: $message for $fname ($remoteurl)");
                   1389: 			       print $client "failed\n";
                   1390: 			   } else {
                   1391: 			       if (!rename($transname,$destname)) {
                   1392: 				   &logthis("Unable to move $transname to $destname");
                   1393: 				   unlink($transname);
                   1394: 				   print $client "failed\n";
                   1395: 			       } else {
                   1396: 				   print $client "ok\n";
                   1397: 			       }
                   1398: 			   }
                   1399: 		       } else {
                   1400: 			   print $client "not_home\n";
                   1401: 		       }
1.85      www      1402: # ------------------------------------------ authenticate access to a user file
1.86      www      1403:                    } elsif ($userinput =~ /^tokenauthuserfile/) {
1.85      www      1404:                        my ($cmd,$fname,$session)=split(/:/,$userinput);
1.86      www      1405:                        chomp($session);
1.134     albertel 1406:                        my $reply='non_auth';
1.86      www      1407:                        if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1.134     albertel 1408: 				$session.'.id')) {
                   1409: 			   while (my $line=<ENVIN>) {
                   1410: 			       if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
                   1411: 			   }
                   1412: 			   close(ENVIN);
                   1413: 			   print $client $reply."\n";
1.86      www      1414: 		       } else {
1.134     albertel 1415: 			   print $client "invalid_token\n";
1.86      www      1416:                        }
1.1       albertel 1417: # ----------------------------------------------------------------- unsubscribe
                   1418:                    } elsif ($userinput =~ /^unsub/) {
                   1419:                        my ($cmd,$fname)=split(/:/,$userinput);
                   1420:                        if (-e $fname) {
1.84      albertel 1421: 			   print $client &unsub($client,$fname,$clientip);
1.1       albertel 1422:                        } else {
                   1423: 			   print $client "not_found\n";
                   1424:                        }
                   1425: # ------------------------------------------------------------------- subscribe
                   1426:                    } elsif ($userinput =~ /^sub/) {
1.84      albertel 1427: 		       print $client &subscribe($userinput,$clientip);
1.102     www      1428: # ------------------------------------------------------------- current version
                   1429:                    } elsif ($userinput =~ /^currentversion/) {
                   1430:                        my ($cmd,$fname)=split(/:/,$userinput);
                   1431: 		       print $client &currentversion($fname)."\n";
1.12      harris41 1432: # ------------------------------------------------------------------------- log
                   1433:                    } elsif ($userinput =~ /^log/) {
                   1434:                        my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
                   1435:                        chomp($what);
                   1436:                        my $proname=propath($udom,$uname);
                   1437:                        my $now=time;
                   1438:                        {
                   1439: 			 my $hfh;
                   1440: 			 if ($hfh=IO::File->new(">>$proname/activity.log")) { 
                   1441:                             print $hfh "$now:$hostid{$clientip}:$what\n";
                   1442:                             print $client "ok\n"; 
                   1443: 			} else {
1.109     foxr     1444:                             print $client "error: ".($!+0)
1.111     matthew  1445: 				." IO::File->new Failed "
                   1446:                                     ."while attempting log\n";
1.12      harris41 1447: 		        }
                   1448: 		       }
1.1       albertel 1449: # ------------------------------------------------------------------------- put
                   1450:                    } elsif ($userinput =~ /^put/) {
1.6       www      1451:                       my ($cmd,$udom,$uname,$namespace,$what)
1.1       albertel 1452:                           =split(/:/,$userinput);
1.8       www      1453:                       $namespace=~s/\//\_/g;
1.6       www      1454:                       $namespace=~s/\W//g;
                   1455:                       if ($namespace ne 'roles') {
1.1       albertel 1456:                        chomp($what);
                   1457:                        my $proname=propath($udom,$uname);
                   1458:                        my $now=time;
1.48      www      1459:                        unless ($namespace=~/^nohist\_/) {
1.1       albertel 1460: 			   my $hfh;
                   1461: 			   if (
                   1462:                              $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1463: 			       ) { print $hfh "P:$now:$what\n"; }
                   1464: 		       }
                   1465:                        my @pairs=split(/\&/,$what);
1.134     albertel 1466: 		       my %hash;
                   1467: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1468:                            foreach my $pair (@pairs) {
                   1469: 			       my ($key,$value)=split(/=/,$pair);
1.1       albertel 1470:                                $hash{$key}=$value;
                   1471:                            }
1.4       www      1472: 			   if (untie(%hash)) {
1.1       albertel 1473:                               print $client "ok\n";
                   1474:                            } else {
1.109     foxr     1475:                               print $client "error: ".($!+0)
1.111     matthew  1476: 				  ." untie(GDBM) failed ".
                   1477:                                       "while attempting put\n";
1.1       albertel 1478:                            }
                   1479:                        } else {
1.109     foxr     1480:                            print $client "error: ".($!)
1.111     matthew  1481: 			       ." tie(GDBM) Failed ".
                   1482:                                    "while attempting put\n";
1.1       albertel 1483:                        }
1.6       www      1484: 		      } else {
                   1485:                           print $client "refused\n";
                   1486:                       }
                   1487: # -------------------------------------------------------------------- rolesput
                   1488:                    } elsif ($userinput =~ /^rolesput/) {
1.77      foxr     1489: 		       &Debug("rolesput");
1.6       www      1490: 		    if ($wasenc==1) {
                   1491:                        my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
                   1492:                           =split(/:/,$userinput);
1.77      foxr     1493: 		       &Debug("cmd = ".$cmd." exedom= ".$exedom.
                   1494: 				    "user = ".$exeuser." udom=".$udom.
                   1495: 				    "what = ".$what);
1.6       www      1496:                        my $namespace='roles';
                   1497:                        chomp($what);
                   1498:                        my $proname=propath($udom,$uname);
                   1499:                        my $now=time;
                   1500:                        {
                   1501: 			   my $hfh;
                   1502: 			   if (
                   1503:                              $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1504: 			       ) { 
                   1505:                                   print $hfh "P:$now:$exedom:$exeuser:$what\n";
                   1506:                                  }
                   1507: 		       }
                   1508:                        my @pairs=split(/\&/,$what);
1.134     albertel 1509: 		       my %hash;
                   1510: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1511:                            foreach my $pair (@pairs) {
                   1512: 			       my ($key,$value)=split(/=/,$pair);
1.78      foxr     1513: 			       &ManagePermissions($key, $udom, $uname,
                   1514: 						  &GetAuthType( $udom, 
                   1515: 								$uname));
1.6       www      1516:                                $hash{$key}=$value;
                   1517:                            }
                   1518: 			   if (untie(%hash)) {
                   1519:                               print $client "ok\n";
                   1520:                            } else {
1.109     foxr     1521:                               print $client "error: ".($!+0)
1.111     matthew  1522: 				  ." untie(GDBM) Failed ".
                   1523:                                       "while attempting rolesput\n";
1.6       www      1524:                            }
                   1525:                        } else {
1.109     foxr     1526:                            print $client "error: ".($!+0)
1.111     matthew  1527: 			       ." tie(GDBM) Failed ".
                   1528:                                    "while attempting rolesput\n";
1.117     www      1529:                        }
                   1530: 		      } else {
                   1531:                           print $client "refused\n";
                   1532:                       }
                   1533: # -------------------------------------------------------------------- rolesdel
                   1534:                    } elsif ($userinput =~ /^rolesdel/) {
                   1535: 		       &Debug("rolesdel");
                   1536: 		    if ($wasenc==1) {
                   1537:                        my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
                   1538:                           =split(/:/,$userinput);
                   1539: 		       &Debug("cmd = ".$cmd." exedom= ".$exedom.
                   1540: 				    "user = ".$exeuser." udom=".$udom.
                   1541: 				    "what = ".$what);
                   1542:                        my $namespace='roles';
                   1543:                        chomp($what);
                   1544:                        my $proname=propath($udom,$uname);
                   1545:                        my $now=time;
                   1546:                        {
                   1547: 			   my $hfh;
                   1548: 			   if (
                   1549:                              $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1550: 			       ) { 
                   1551:                                   print $hfh "D:$now:$exedom:$exeuser:$what\n";
                   1552:                                  }
                   1553: 		       }
                   1554:                        my @rolekeys=split(/\&/,$what);
1.134     albertel 1555: 		       my %hash;
                   1556: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1557:                            foreach my $key (@rolekeys) {
1.117     www      1558:                                delete $hash{$key};
                   1559:                            }
                   1560: 			   if (untie(%hash)) {
                   1561:                               print $client "ok\n";
                   1562:                            } else {
                   1563:                               print $client "error: ".($!+0)
                   1564: 				  ." untie(GDBM) Failed ".
                   1565:                                       "while attempting rolesdel\n";
                   1566:                            }
                   1567:                        } else {
                   1568:                            print $client "error: ".($!+0)
                   1569: 			       ." tie(GDBM) Failed ".
                   1570:                                    "while attempting rolesdel\n";
1.6       www      1571:                        }
                   1572: 		      } else {
                   1573:                           print $client "refused\n";
                   1574:                       }
1.1       albertel 1575: # ------------------------------------------------------------------------- get
                   1576:                    } elsif ($userinput =~ /^get/) {
                   1577:                        my ($cmd,$udom,$uname,$namespace,$what)
                   1578:                           =split(/:/,$userinput);
1.8       www      1579:                        $namespace=~s/\//\_/g;
1.1       albertel 1580:                        $namespace=~s/\W//g;
                   1581:                        chomp($what);
                   1582:                        my @queries=split(/\&/,$what);
                   1583:                        my $proname=propath($udom,$uname);
                   1584:                        my $qresult='';
1.134     albertel 1585: 		       my %hash;
                   1586: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   1587:                            for (my $i=0;$i<=$#queries;$i++) {
1.1       albertel 1588:                                $qresult.="$hash{$queries[$i]}&";
                   1589:                            }
1.4       www      1590: 			   if (untie(%hash)) {
1.1       albertel 1591: 		              $qresult=~s/\&$//;
                   1592:                               print $client "$qresult\n";
                   1593:                            } else {
1.109     foxr     1594:                               print $client "error: ".($!+0)
1.111     matthew  1595: 				  ." untie(GDBM) Failed ".
                   1596:                                       "while attempting get\n";
1.1       albertel 1597:                            }
                   1598:                        } else {
1.112     matthew  1599:                            if ($!+0 == 2) {
                   1600:                                print $client "error:No such file or ".
                   1601:                                    "GDBM reported bad block error\n";
                   1602:                            } else {
                   1603:                                print $client "error: ".($!+0)
                   1604:                                    ." tie(GDBM) Failed ".
                   1605:                                        "while attempting get\n";
                   1606:                            }
1.1       albertel 1607:                        }
                   1608: # ------------------------------------------------------------------------ eget
                   1609:                    } elsif ($userinput =~ /^eget/) {
                   1610:                        my ($cmd,$udom,$uname,$namespace,$what)
                   1611:                           =split(/:/,$userinput);
1.8       www      1612:                        $namespace=~s/\//\_/g;
1.1       albertel 1613:                        $namespace=~s/\W//g;
                   1614:                        chomp($what);
                   1615:                        my @queries=split(/\&/,$what);
                   1616:                        my $proname=propath($udom,$uname);
                   1617:                        my $qresult='';
1.134     albertel 1618: 		       my %hash;
                   1619: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   1620:                            for (my $i=0;$i<=$#queries;$i++) {
1.1       albertel 1621:                                $qresult.="$hash{$queries[$i]}&";
                   1622:                            }
1.4       www      1623: 			   if (untie(%hash)) {
1.1       albertel 1624: 		              $qresult=~s/\&$//;
                   1625:                               if ($cipher) {
                   1626:                                 my $cmdlength=length($qresult);
                   1627:                                 $qresult.="         ";
                   1628:                                 my $encqresult='';
                   1629:                                 for 
                   1630: 				(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                   1631:                                  $encqresult.=
                   1632:                                  unpack("H16",
                   1633:                                  $cipher->encrypt(substr($qresult,$encidx,8)));
                   1634:                                 }
                   1635:                                 print $client "enc:$cmdlength:$encqresult\n";
                   1636: 			      } else {
                   1637: 			        print $client "error:no_key\n";
                   1638:                               }
                   1639:                            } else {
1.109     foxr     1640:                               print $client "error: ".($!+0)
1.111     matthew  1641: 				  ." untie(GDBM) Failed ".
                   1642:                                       "while attempting eget\n";
1.1       albertel 1643:                            }
                   1644:                        } else {
1.109     foxr     1645:                            print $client "error: ".($!+0)
1.111     matthew  1646: 			       ." tie(GDBM) Failed ".
                   1647:                                    "while attempting eget\n";
1.1       albertel 1648:                        }
                   1649: # ------------------------------------------------------------------------- del
                   1650:                    } elsif ($userinput =~ /^del/) {
                   1651:                        my ($cmd,$udom,$uname,$namespace,$what)
                   1652:                           =split(/:/,$userinput);
1.8       www      1653:                        $namespace=~s/\//\_/g;
1.1       albertel 1654:                        $namespace=~s/\W//g;
                   1655:                        chomp($what);
                   1656:                        my $proname=propath($udom,$uname);
                   1657:                        my $now=time;
1.48      www      1658:                        unless ($namespace=~/^nohist\_/) {
1.1       albertel 1659: 			   my $hfh;
                   1660: 			   if (
                   1661:                              $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1662: 			       ) { print $hfh "D:$now:$what\n"; }
                   1663: 		       }
                   1664:                        my @keys=split(/\&/,$what);
1.134     albertel 1665: 		       my %hash;
                   1666: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1667:                            foreach my $key (@keys) {
1.1       albertel 1668:                                delete($hash{$key});
                   1669:                            }
1.4       www      1670: 			   if (untie(%hash)) {
1.1       albertel 1671:                               print $client "ok\n";
                   1672:                            } else {
1.109     foxr     1673:                               print $client "error: ".($!+0)
1.111     matthew  1674: 				  ." untie(GDBM) Failed ".
                   1675:                                       "while attempting del\n";
1.1       albertel 1676:                            }
                   1677:                        } else {
1.109     foxr     1678:                            print $client "error: ".($!+0)
1.111     matthew  1679: 			       ." tie(GDBM) Failed ".
                   1680:                                    "while attempting del\n";
1.1       albertel 1681:                        }
                   1682: # ------------------------------------------------------------------------ keys
                   1683:                    } elsif ($userinput =~ /^keys/) {
                   1684:                        my ($cmd,$udom,$uname,$namespace)
                   1685:                           =split(/:/,$userinput);
1.8       www      1686:                        $namespace=~s/\//\_/g;
1.1       albertel 1687:                        $namespace=~s/\W//g;
                   1688:                        my $proname=propath($udom,$uname);
                   1689:                        my $qresult='';
1.134     albertel 1690: 		       my %hash;
                   1691: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   1692:                            foreach my $key (keys %hash) {
1.1       albertel 1693:                                $qresult.="$key&";
                   1694:                            }
1.4       www      1695: 			   if (untie(%hash)) {
1.1       albertel 1696: 		              $qresult=~s/\&$//;
                   1697:                               print $client "$qresult\n";
                   1698:                            } else {
1.109     foxr     1699:                               print $client "error: ".($!+0)
1.111     matthew  1700: 				  ." untie(GDBM) Failed ".
                   1701:                                       "while attempting keys\n";
1.105     matthew  1702:                            }
                   1703:                        } else {
1.109     foxr     1704:                            print $client "error: ".($!+0)
1.111     matthew  1705: 			       ." tie(GDBM) Failed ".
                   1706:                                    "while attempting keys\n";
1.105     matthew  1707:                        }
                   1708: # ----------------------------------------------------------------- dumpcurrent
1.107     matthew  1709:                    } elsif ($userinput =~ /^currentdump/) {
1.105     matthew  1710:                        my ($cmd,$udom,$uname,$namespace)
                   1711:                           =split(/:/,$userinput);
                   1712:                        $namespace=~s/\//\_/g;
                   1713:                        $namespace=~s/\W//g;
                   1714:                        my $qresult='';
                   1715:                        my $proname=propath($udom,$uname);
1.134     albertel 1716: 		       my %hash;
1.105     matthew  1717:                        if (tie(%hash,'GDBM_File',
                   1718:                                "$proname/$namespace.db",
                   1719:                                &GDBM_READER(),0640)) {
                   1720:                            # Structure of %data:
                   1721:                            # $data{$symb}->{$parameter}=$value;
                   1722:                            # $data{$symb}->{'v.'.$parameter}=$version;
                   1723:                            # since $parameter will be unescaped, we do not
                   1724:                            # have to worry about silly parameter names...
                   1725:                            my %data = ();
                   1726:                            while (my ($key,$value) = each(%hash)) {
                   1727:                               my ($v,$symb,$param) = split(/:/,$key);
                   1728:                               next if ($v eq 'version' || $symb eq 'keys');
                   1729:                               next if (exists($data{$symb}) && 
                   1730:                                        exists($data{$symb}->{$param}) &&
                   1731:                                        $data{$symb}->{'v.'.$param} > $v);
                   1732:                               $data{$symb}->{$param}=$value;
1.107     matthew  1733:                               $data{$symb}->{'v.'.$param}=$v;
1.105     matthew  1734:                            }
                   1735:                            if (untie(%hash)) {
                   1736:                              while (my ($symb,$param_hash) = each(%data)) {
                   1737:                                while(my ($param,$value) = each (%$param_hash)){
                   1738:                                  next if ($param =~ /^v\./);
                   1739:                                  $qresult.=$symb.':'.$param.'='.$value.'&';
                   1740:                                }
                   1741:                              }
                   1742:                              chop($qresult);
                   1743:                              print $client "$qresult\n";
                   1744:                            } else {
1.109     foxr     1745:                              print $client "error: ".($!+0)
1.111     matthew  1746: 				 ." untie(GDBM) Failed ".
                   1747:                                      "while attempting currentdump\n";
1.1       albertel 1748:                            }
                   1749:                        } else {
1.109     foxr     1750:                            print $client "error: ".($!+0)
1.111     matthew  1751: 			       ." tie(GDBM) Failed ".
                   1752:                                       "while attempting currentdump\n";
1.1       albertel 1753:                        }
                   1754: # ------------------------------------------------------------------------ dump
                   1755:                    } elsif ($userinput =~ /^dump/) {
1.62      www      1756:                        my ($cmd,$udom,$uname,$namespace,$regexp)
1.1       albertel 1757:                           =split(/:/,$userinput);
1.8       www      1758:                        $namespace=~s/\//\_/g;
1.1       albertel 1759:                        $namespace=~s/\W//g;
1.62      www      1760:                        if (defined($regexp)) {
                   1761:                           $regexp=&unescape($regexp);
                   1762: 		       } else {
                   1763:                           $regexp='.';
                   1764: 		       }
1.100     matthew  1765:                        my $qresult='';
1.1       albertel 1766:                        my $proname=propath($udom,$uname);
1.134     albertel 1767: 		       my %hash;
                   1768: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1.90      stredwic 1769:                            study($regexp);
1.134     albertel 1770:                            while (my ($key,$value) = each(%hash)) {
1.100     matthew  1771:                                if ($regexp eq '.') {
                   1772:                                    $qresult.=$key.'='.$value.'&';
                   1773:                                } else {
                   1774:                                    my $unescapeKey = &unescape($key);
                   1775:                                    if (eval('$unescapeKey=~/$regexp/')) {
                   1776:                                        $qresult.="$key=$value&";
                   1777:                                    }
                   1778:                                }
1.7       www      1779:                            }
1.100     matthew  1780:                            if (untie(%hash)) {
                   1781:                                chop($qresult);
                   1782:                                print $client "$qresult\n";
1.7       www      1783:                            } else {
1.109     foxr     1784:                                print $client "error: ".($!+0)
1.111     matthew  1785: 				   ." untie(GDBM) Failed ".
                   1786:                                        "while attempting dump\n";
1.7       www      1787:                            }
                   1788:                        } else {
1.109     foxr     1789:                            print $client "error: ".($!+0)
1.111     matthew  1790: 			       ." tie(GDBM) Failed ".
                   1791:                                       "while attempting dump\n";
1.7       www      1792:                        }
                   1793: # ----------------------------------------------------------------------- store
                   1794:                    } elsif ($userinput =~ /^store/) {
                   1795:                       my ($cmd,$udom,$uname,$namespace,$rid,$what)
                   1796:                           =split(/:/,$userinput);
1.8       www      1797:                       $namespace=~s/\//\_/g;
1.7       www      1798:                       $namespace=~s/\W//g;
                   1799:                       if ($namespace ne 'roles') {
                   1800:                        chomp($what);
                   1801:                        my $proname=propath($udom,$uname);
                   1802:                        my $now=time;
1.48      www      1803:                        unless ($namespace=~/^nohist\_/) {
1.7       www      1804: 			   my $hfh;
                   1805: 			   if (
                   1806:                              $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1807: 			       ) { print $hfh "P:$now:$rid:$what\n"; }
                   1808: 		       }
                   1809:                        my @pairs=split(/\&/,$what);
1.134     albertel 1810: 		       my %hash;
                   1811: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1.7       www      1812:                            my @previouskeys=split(/&/,$hash{"keys:$rid"});
                   1813:                            my $key;
                   1814:                            $hash{"version:$rid"}++;
                   1815:                            my $version=$hash{"version:$rid"};
                   1816:                            my $allkeys=''; 
1.134     albertel 1817:                            foreach my $pair (@pairs) {
                   1818: 			       my ($key,$value)=split(/=/,$pair);
1.7       www      1819:                                $allkeys.=$key.':';
                   1820:                                $hash{"$version:$rid:$key"}=$value;
                   1821:                            }
1.36      www      1822:                            $hash{"$version:$rid:timestamp"}=$now;
                   1823:                            $allkeys.='timestamp';
1.7       www      1824:                            $hash{"$version:keys:$rid"}=$allkeys;
                   1825: 			   if (untie(%hash)) {
                   1826:                               print $client "ok\n";
                   1827:                            } else {
1.109     foxr     1828:                               print $client "error: ".($!+0)
1.111     matthew  1829: 				  ." untie(GDBM) Failed ".
                   1830:                                       "while attempting store\n";
1.7       www      1831:                            }
                   1832:                        } else {
1.109     foxr     1833:                            print $client "error: ".($!+0)
1.111     matthew  1834: 			       ." tie(GDBM) Failed ".
                   1835:                                    "while attempting store\n";
1.7       www      1836:                        }
                   1837: 		      } else {
                   1838:                           print $client "refused\n";
                   1839:                       }
                   1840: # --------------------------------------------------------------------- restore
                   1841:                    } elsif ($userinput =~ /^restore/) {
                   1842:                        my ($cmd,$udom,$uname,$namespace,$rid)
                   1843:                           =split(/:/,$userinput);
1.8       www      1844:                        $namespace=~s/\//\_/g;
1.7       www      1845:                        $namespace=~s/\W//g;
                   1846:                        chomp($rid);
                   1847:                        my $proname=propath($udom,$uname);
                   1848:                        my $qresult='';
1.134     albertel 1849: 		       my %hash;
                   1850: 		       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1.7       www      1851:                 	   my $version=$hash{"version:$rid"};
                   1852:                            $qresult.="version=$version&";
                   1853:                            my $scope;
                   1854:                            for ($scope=1;$scope<=$version;$scope++) {
                   1855: 			      my $vkeys=$hash{"$scope:keys:$rid"};
                   1856:                               my @keys=split(/:/,$vkeys);
                   1857:                               my $key;
                   1858:                               $qresult.="$scope:keys=$vkeys&";
                   1859:                               foreach $key (@keys) {
1.21      www      1860: 	     $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1.7       www      1861:                               }                                  
1.1       albertel 1862:                            }
1.4       www      1863: 			   if (untie(%hash)) {
1.1       albertel 1864: 		              $qresult=~s/\&$//;
                   1865:                               print $client "$qresult\n";
                   1866:                            } else {
1.109     foxr     1867:                               print $client "error: ".($!+0)
1.111     matthew  1868: 				  ." untie(GDBM) Failed ".
                   1869:                                       "while attempting restore\n";
1.1       albertel 1870:                            }
                   1871:                        } else {
1.109     foxr     1872:                            print $client "error: ".($!+0)
1.111     matthew  1873: 			       ." tie(GDBM) Failed ".
                   1874:                                    "while attempting restore\n";
1.1       albertel 1875:                        }
1.86      www      1876: # -------------------------------------------------------------------- chatsend
                   1877:                    } elsif ($userinput =~ /^chatsend/) {
                   1878:                        my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
                   1879:                        &chatadd($cdom,$cnum,$newpost);
                   1880:                        print $client "ok\n";
                   1881: # -------------------------------------------------------------------- chatretr
                   1882:                    } elsif ($userinput =~ /^chatretr/) {
1.122     www      1883:                        my 
                   1884:                         ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
1.86      www      1885:                        my $reply='';
1.122     www      1886:                        foreach (&getchat($cdom,$cnum,$udom,$uname)) {
1.86      www      1887: 			   $reply.=&escape($_).':';
                   1888:                        }
                   1889:                        $reply=~s/\:$//;
                   1890:                        print $client $reply."\n";
1.12      harris41 1891: # ------------------------------------------------------------------- querysend
                   1892:                    } elsif ($userinput =~ /^querysend/) {
1.44      harris41 1893:                        my ($cmd,$query,
1.82      www      1894: 			   $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1.12      harris41 1895: 		       $query=~s/\n*$//g;
1.82      www      1896: 		       print $client "".
1.40      harris41 1897: 			       sqlreply("$hostid{$clientip}\&$query".
1.82      www      1898: 					"\&$arg1"."\&$arg2"."\&$arg3")."\n";
1.12      harris41 1899: # ------------------------------------------------------------------ queryreply
                   1900:                    } elsif ($userinput =~ /^queryreply/) {
                   1901:                        my ($cmd,$id,$reply)=split(/:/,$userinput); 
                   1902: 		       my $store;
1.13      www      1903:                        my $execdir=$perlvar{'lonDaemons'};
                   1904:                        if ($store=IO::File->new(">$execdir/tmp/$id")) {
1.43      harris41 1905: 			   $reply=~s/\&/\n/g;
1.12      harris41 1906: 			   print $store $reply;
                   1907: 			   close $store;
1.46      harris41 1908: 			   my $store2=IO::File->new(">$execdir/tmp/$id.end");
                   1909: 			   print $store2 "done\n";
                   1910: 			   close $store2;
1.12      harris41 1911: 			   print $client "ok\n";
                   1912: 		       }
                   1913: 		       else {
1.109     foxr     1914: 			   print $client "error: ".($!+0)
1.111     matthew  1915: 			       ." IO::File->new Failed ".
                   1916:                                    "while attempting queryreply\n";
1.12      harris41 1917: 		       }
1.118     www      1918: # ----------------------------------------------------------------- courseidput
                   1919:                    } elsif ($userinput =~ /^courseidput/) {
                   1920:                        my ($cmd,$udom,$what)=split(/:/,$userinput);
                   1921:                        chomp($what);
                   1922:                        $udom=~s/\W//g;
                   1923:                        my $proname=
                   1924:                               "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
                   1925:                        my $now=time;
                   1926:                        my @pairs=split(/\&/,$what);
1.134     albertel 1927: 		       my %hash;
                   1928: 		       if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
                   1929:                            foreach my $pair (@pairs) {
                   1930: 			       my ($key,$value)=split(/=/,$pair);
1.118     www      1931:                                $hash{$key}=$value.':'.$now;
                   1932:                            }
                   1933: 			   if (untie(%hash)) {
                   1934:                               print $client "ok\n";
                   1935:                            } else {
                   1936:                               print $client "error: ".($!+0)
                   1937: 				  ." untie(GDBM) Failed ".
                   1938:                                       "while attempting courseidput\n";
                   1939:                            }
                   1940:                        } else {
                   1941:                            print $client "error: ".($!+0)
                   1942: 			       ." tie(GDBM) Failed ".
                   1943:                                       "while attempting courseidput\n";
                   1944:                        }
                   1945: # ---------------------------------------------------------------- courseiddump
                   1946:                    } elsif ($userinput =~ /^courseiddump/) {
                   1947:                        my ($cmd,$udom,$since,$description)
                   1948:                           =split(/:/,$userinput);
                   1949:                        if (defined($description)) {
                   1950:                           $description=&unescape($description);
                   1951: 		       } else {
                   1952:                           $description='.';
                   1953: 		       }
                   1954:                        unless (defined($since)) { $since=0; }
                   1955:                        my $qresult='';
                   1956:                        my $proname=
                   1957:                               "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1.134     albertel 1958: 		       my %hash;
                   1959: 		       if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
                   1960:                            while (my ($key,$value) = each(%hash)) {
1.118     www      1961:                                my ($descr,$lasttime)=split(/\:/,$value);
                   1962:                                if ($lasttime<$since) { next; }
1.133     www      1963:                                if ($description eq '.') {
1.118     www      1964:                                    $qresult.=$key.'='.$descr.'&';
                   1965:                                } else {
                   1966:                                    my $unescapeVal = &unescape($descr);
1.120     www      1967:                                    if (eval('$unescapeVal=~/$description/i')) {
1.118     www      1968:                                        $qresult.="$key=$descr&";
                   1969:                                    }
                   1970:                                }
                   1971:                            }
                   1972:                            if (untie(%hash)) {
                   1973:                                chop($qresult);
                   1974:                                print $client "$qresult\n";
                   1975:                            } else {
                   1976:                                print $client "error: ".($!+0)
                   1977: 				   ." untie(GDBM) Failed ".
                   1978:                                        "while attempting courseiddump\n";
                   1979:                            }
                   1980:                        } else {
                   1981:                            print $client "error: ".($!+0)
                   1982: 			       ." tie(GDBM) Failed ".
                   1983:                                       "while attempting courseiddump\n";
                   1984:                        }
1.1       albertel 1985: # ----------------------------------------------------------------------- idput
                   1986:                    } elsif ($userinput =~ /^idput/) {
                   1987:                        my ($cmd,$udom,$what)=split(/:/,$userinput);
                   1988:                        chomp($what);
                   1989:                        $udom=~s/\W//g;
                   1990:                        my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
                   1991:                        my $now=time;
                   1992:                        {
                   1993: 			   my $hfh;
                   1994: 			   if (
                   1995:                              $hfh=IO::File->new(">>$proname.hist")
                   1996: 			       ) { print $hfh "P:$now:$what\n"; }
                   1997: 		       }
                   1998:                        my @pairs=split(/\&/,$what);
1.134     albertel 1999: 		       my %hash;
                   2000: 		       if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
                   2001:                            foreach my $pair (@pairs) {
                   2002: 			       my ($key,$value)=split(/=/,$pair);
1.1       albertel 2003:                                $hash{$key}=$value;
                   2004:                            }
1.4       www      2005: 			   if (untie(%hash)) {
1.1       albertel 2006:                               print $client "ok\n";
                   2007:                            } else {
1.109     foxr     2008:                               print $client "error: ".($!+0)
1.111     matthew  2009: 				  ." untie(GDBM) Failed ".
                   2010:                                       "while attempting idput\n";
1.1       albertel 2011:                            }
                   2012:                        } else {
1.109     foxr     2013:                            print $client "error: ".($!+0)
1.111     matthew  2014: 			       ." tie(GDBM) Failed ".
                   2015:                                       "while attempting idput\n";
1.1       albertel 2016:                        }
                   2017: # ----------------------------------------------------------------------- idget
                   2018:                    } elsif ($userinput =~ /^idget/) {
                   2019:                        my ($cmd,$udom,$what)=split(/:/,$userinput);
                   2020:                        chomp($what);
                   2021:                        $udom=~s/\W//g;
                   2022:                        my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
                   2023:                        my @queries=split(/\&/,$what);
                   2024:                        my $qresult='';
1.134     albertel 2025: 		       my %hash;
                   2026: 		       if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
                   2027:                            for (my $i=0;$i<=$#queries;$i++) {
1.1       albertel 2028:                                $qresult.="$hash{$queries[$i]}&";
                   2029:                            }
1.4       www      2030: 			   if (untie(%hash)) {
1.134     albertel 2031: 			       $qresult=~s/\&$//;
                   2032: 			       print $client "$qresult\n";
1.1       albertel 2033:                            } else {
1.134     albertel 2034: 			       print $client "error: ".($!+0)
                   2035: 				   ." untie(GDBM) Failed ".
                   2036: 				       "while attempting idget\n";
1.1       albertel 2037:                            }
                   2038:                        } else {
1.109     foxr     2039:                            print $client "error: ".($!+0)
1.111     matthew  2040: 			       ." tie(GDBM) Failed ".
                   2041:                                    "while attempting idget\n";
1.1       albertel 2042:                        }
1.13      www      2043: # ---------------------------------------------------------------------- tmpput
                   2044:                    } elsif ($userinput =~ /^tmpput/) {
                   2045:                        my ($cmd,$what)=split(/:/,$userinput);
                   2046: 		       my $store;
                   2047:                        $tmpsnum++;
                   2048:                        my $id=$$.'_'.$clientip.'_'.$tmpsnum;
                   2049:                        $id=~s/\W/\_/g;
                   2050:                        $what=~s/\n//g;
                   2051:                        my $execdir=$perlvar{'lonDaemons'};
                   2052:                        if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
                   2053: 			   print $store $what;
                   2054: 			   close $store;
                   2055: 			   print $client "$id\n";
                   2056: 		       }
                   2057: 		       else {
1.109     foxr     2058: 			   print $client "error: ".($!+0)
1.111     matthew  2059: 			       ."IO::File->new Failed ".
                   2060:                                    "while attempting tmpput\n";
1.13      www      2061: 		       }
                   2062: 
                   2063: # ---------------------------------------------------------------------- tmpget
                   2064:                    } elsif ($userinput =~ /^tmpget/) {
                   2065:                        my ($cmd,$id)=split(/:/,$userinput);
                   2066:                        chomp($id);
                   2067:                        $id=~s/\W/\_/g;
                   2068:                        my $store;
                   2069:                        my $execdir=$perlvar{'lonDaemons'};
                   2070:                        if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
                   2071:                            my $reply=<$store>;
                   2072: 			   print $client "$reply\n";
                   2073:                            close $store;
                   2074: 		       }
                   2075: 		       else {
1.109     foxr     2076: 			   print $client "error: ".($!+0)
1.111     matthew  2077: 			       ."IO::File->new Failed ".
                   2078:                                    "while attempting tmpget\n";
1.13      www      2079: 		       }
                   2080: 
1.110     www      2081: # ---------------------------------------------------------------------- tmpdel
                   2082:                    } elsif ($userinput =~ /^tmpdel/) {
                   2083:                        my ($cmd,$id)=split(/:/,$userinput);
                   2084:                        chomp($id);
                   2085:                        $id=~s/\W/\_/g;
                   2086:                        my $execdir=$perlvar{'lonDaemons'};
                   2087:                        if (unlink("$execdir/tmp/$id.tmp")) {
                   2088: 			   print $client "ok\n";
                   2089: 		       } else {
                   2090: 			   print $client "error: ".($!+0)
1.111     matthew  2091: 			       ."Unlink tmp Failed ".
                   2092:                                    "while attempting tmpdel\n";
1.110     www      2093: 		       }
1.5       www      2094: # -------------------------------------------------------------------------- ls
                   2095:                    } elsif ($userinput =~ /^ls/) {
                   2096:                        my ($cmd,$ulsdir)=split(/:/,$userinput);
                   2097:                        my $ulsout='';
                   2098:                        my $ulsfn;
                   2099:                        if (-e $ulsdir) {
1.83      stredwic 2100:                            if(-d $ulsdir) {
                   2101:                                if (opendir(LSDIR,$ulsdir)) {
                   2102:                                    while ($ulsfn=readdir(LSDIR)) {
                   2103:                                        my @ulsstats=stat($ulsdir.'/'.$ulsfn);
                   2104:                                        $ulsout.=$ulsfn.'&'.
                   2105:                                                 join('&',@ulsstats).':';
                   2106:                                    }
                   2107:                                    closedir(LSDIR);
                   2108:                                }
                   2109:                            } else {
                   2110:                                my @ulsstats=stat($ulsdir);
                   2111:                                $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
                   2112:                            }
                   2113:                        } else {
1.5       www      2114:                           $ulsout='no_such_dir';
                   2115:                        }
1.17      www      2116:                        if ($ulsout eq '') { $ulsout='empty'; }
1.5       www      2117:                        print $client "$ulsout\n";
1.136     www      2118: # ----------------------------------------------------------------- setannounce
                   2119:                    } elsif ($userinput =~ /^setannounce/) {
                   2120: 		       my ($cmd,$announcement)=split(/:/,$userinput);
                   2121: 		       chomp($announcement);
                   2122: 		       $announcement=&unescape($announcement);
                   2123:                        if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
                   2124: 						'/announcement.txt')) {
                   2125: 			   print $store $announcement;
                   2126:                            close $store;
                   2127: 			   print $client "ok\n";
                   2128: 		       } else {
                   2129: 			   print $client "error: ".($!+0)."\n";
                   2130: 		       }
1.51      www      2131: # ------------------------------------------------------------------ Hanging up
                   2132:                    } elsif (($userinput =~ /^exit/) ||
                   2133:                             ($userinput =~ /^init/)) {
                   2134:                        &logthis(
                   2135:       "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
                   2136:                        print $client "bye\n";
1.59      www      2137:                        $client->close();
1.51      www      2138: 		       last;
1.1       albertel 2139: # ------------------------------------------------------------- unknown command
1.121     albertel 2140: 		   } elsif ($userinput =~ /^sethost:/) {
                   2141: 		       print $client &sethost($userinput)."\n";
                   2142: 		   } elsif ($userinput =~/^version:/) {
                   2143: 		       print $client &version($userinput)."\n";
1.1       albertel 2144:                    } else {
                   2145:                        # unknown command
                   2146:                        print $client "unknown_cmd\n";
                   2147:                    }
1.58      www      2148: # -------------------------------------------------------------------- complete
1.63      www      2149: 		   alarm(0);
1.58      www      2150:                    &status('Listening to '.$hostid{$clientip});
                   2151: 	       }
1.59      www      2152: # --------------------------------------------- client unknown or fishy, refuse
1.1       albertel 2153:             } else {
                   2154: 	        print $client "refused\n";
1.59      www      2155:                 $client->close();
1.9       www      2156:                 &logthis("<font color=blue>WARNING: "
                   2157:                 ."Rejected client $clientip, closing connection</font>");
1.75      foxr     2158:             }
1.106     foxr     2159: 	}             
1.75      foxr     2160: 
1.1       albertel 2161: # =============================================================================
1.75      foxr     2162:        
                   2163: 	&logthis("<font color=red>CRITICAL: "
                   2164: 		 ."Disconnect from $clientip ($hostid{$clientip})</font>");    
1.106     foxr     2165: 
1.59      www      2166: 
1.1       albertel 2167:         # this exit is VERY important, otherwise the child will become
                   2168:         # a producer of more and more children, forking yourself into
                   2169:         # process death.
                   2170:         exit;
1.106     foxr     2171:     
1.78      foxr     2172: }
                   2173: 
                   2174: 
                   2175: #
                   2176: #   Checks to see if the input roleput request was to set
                   2177: # an author role.  If so, invokes the lchtmldir script to set
                   2178: # up a correct public_html 
                   2179: # Parameters:
                   2180: #    request   - The request sent to the rolesput subchunk.
                   2181: #                We're looking for  /domain/_au
                   2182: #    domain    - The domain in which the user is having roles doctored.
                   2183: #    user      - Name of the user for which the role is being put.
                   2184: #    authtype  - The authentication type associated with the user.
                   2185: #
                   2186: sub ManagePermissions
                   2187: {
                   2188:     my $request = shift;
                   2189:     my $domain  = shift;
                   2190:     my $user    = shift;
                   2191:     my $authtype= shift;
                   2192: 
                   2193:     # See if the request is of the form /$domain/_au
1.134     albertel 2194:     &logthis("ruequest is $request");
1.78      foxr     2195:     if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
                   2196: 	my $execdir = $perlvar{'lonDaemons'};
                   2197: 	my $userhome= "/home/$user" ;
1.134     albertel 2198: 	&logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78      foxr     2199: 	system("$execdir/lchtmldir $userhome $user $authtype");
                   2200:     }
                   2201: }
                   2202: #
                   2203: #   GetAuthType - Determines the authorization type of a user in a domain.
                   2204: 
                   2205: #     Returns the authorization type or nouser if there is no such user.
                   2206: #
                   2207: sub GetAuthType 
                   2208: {
                   2209:     my $domain = shift;
                   2210:     my $user   = shift;
                   2211: 
1.79      foxr     2212:     Debug("GetAuthType( $domain, $user ) \n");
1.78      foxr     2213:     my $proname    = &propath($domain, $user); 
                   2214:     my $passwdfile = "$proname/passwd";
                   2215:     if( -e $passwdfile ) {
                   2216: 	my $pf = IO::File->new($passwdfile);
                   2217: 	my $realpassword = <$pf>;
                   2218: 	chomp($realpassword);
1.79      foxr     2219: 	Debug("Password info = $realpassword\n");
1.78      foxr     2220: 	my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79      foxr     2221: 	Debug("Authtype = $authtype, content = $contentpwd\n");
1.78      foxr     2222: 	my $availinfo = '';
1.91      albertel 2223: 	if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78      foxr     2224: 	    $availinfo = $contentpwd;
                   2225: 	}
1.79      foxr     2226: 
1.78      foxr     2227: 	return "$authtype:$availinfo";
                   2228:     }
                   2229:     else {
1.79      foxr     2230: 	Debug("Returning nouser");
1.78      foxr     2231: 	return "nouser";
                   2232:     }
1.1       albertel 2233: }
                   2234: 
1.84      albertel 2235: sub addline {
                   2236:     my ($fname,$hostid,$ip,$newline)=@_;
                   2237:     my $contents;
                   2238:     my $found=0;
                   2239:     my $expr='^'.$hostid.':'.$ip.':';
                   2240:     $expr =~ s/\./\\\./g;
1.134     albertel 2241:     my $sh;
1.84      albertel 2242:     if ($sh=IO::File->new("$fname.subscription")) {
                   2243: 	while (my $subline=<$sh>) {
                   2244: 	    if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
                   2245: 	}
                   2246: 	$sh->close();
                   2247:     }
                   2248:     $sh=IO::File->new(">$fname.subscription");
                   2249:     if ($contents) { print $sh $contents; }
                   2250:     if ($newline) { print $sh $newline; }
                   2251:     $sh->close();
                   2252:     return $found;
1.86      www      2253: }
                   2254: 
                   2255: sub getchat {
1.122     www      2256:     my ($cdom,$cname,$udom,$uname)=@_;
1.87      www      2257:     my %hash;
                   2258:     my $proname=&propath($cdom,$cname);
                   2259:     my @entries=();
1.88      albertel 2260:     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
                   2261: 	    &GDBM_READER(),0640)) {
                   2262: 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
                   2263: 	untie %hash;
1.123     www      2264:     }
1.124     www      2265:     my @participants=();
1.134     albertel 2266:     my $cutoff=time-60;
1.123     www      2267:     if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124     www      2268: 	    &GDBM_WRCREAT(),0640)) {
                   2269:         $hash{$uname.':'.$udom}=time;
1.123     www      2270:         foreach (sort keys %hash) {
                   2271: 	    if ($hash{$_}>$cutoff) {
1.124     www      2272: 		$participants[$#participants+1]='active_participant:'.$_;
1.123     www      2273:             }
                   2274:         }
                   2275:         untie %hash;
1.86      www      2276:     }
1.124     www      2277:     return (@participants,@entries);
1.86      www      2278: }
                   2279: 
                   2280: sub chatadd {
1.88      albertel 2281:     my ($cdom,$cname,$newchat)=@_;
                   2282:     my %hash;
                   2283:     my $proname=&propath($cdom,$cname);
                   2284:     my @entries=();
1.142     www      2285:     my $time=time;
1.88      albertel 2286:     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
                   2287: 	    &GDBM_WRCREAT(),0640)) {
                   2288: 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
                   2289: 	my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
                   2290: 	my ($thentime,$idnum)=split(/\_/,$lastid);
                   2291: 	my $newid=$time.'_000000';
                   2292: 	if ($thentime==$time) {
                   2293: 	    $idnum=~s/^0+//;
                   2294: 	    $idnum++;
                   2295: 	    $idnum=substr('000000'.$idnum,-6,6);
                   2296: 	    $newid=$time.'_'.$idnum;
                   2297: 	}
                   2298: 	$hash{$newid}=$newchat;
                   2299: 	my $expired=$time-3600;
                   2300: 	foreach (keys %hash) {
                   2301: 	    my ($thistime)=($_=~/(\d+)\_/);
                   2302: 	    if ($thistime<$expired) {
1.89      www      2303: 		delete $hash{$_};
1.88      albertel 2304: 	    }
                   2305: 	}
                   2306: 	untie %hash;
1.142     www      2307:     }
                   2308:     {
                   2309: 	my $hfh;
                   2310: 	if ($hfh=IO::File->new(">>$proname/chatroom.log")) { 
                   2311: 	    print $hfh "$time:".&unescape($newchat)."\n";
                   2312: 	}
1.86      www      2313:     }
1.84      albertel 2314: }
                   2315: 
                   2316: sub unsub {
                   2317:     my ($fname,$clientip)=@_;
                   2318:     my $result;
                   2319:     if (unlink("$fname.$hostid{$clientip}")) {
                   2320: 	$result="ok\n";
                   2321:     } else {
                   2322: 	$result="not_subscribed\n";
                   2323:     }
                   2324:     if (-e "$fname.subscription") {
                   2325: 	my $found=&addline($fname,$hostid{$clientip},$clientip,'');
                   2326: 	if ($found) { $result="ok\n"; }
                   2327:     } else {
                   2328: 	if ($result != "ok\n") { $result="not_subscribed\n"; }
                   2329:     }
                   2330:     return $result;
                   2331: }
                   2332: 
1.101     www      2333: sub currentversion {
                   2334:     my $fname=shift;
                   2335:     my $version=-1;
                   2336:     my $ulsdir='';
                   2337:     if ($fname=~/^(.+)\/[^\/]+$/) {
                   2338:        $ulsdir=$1;
                   2339:     }
1.114     albertel 2340:     my ($fnamere1,$fnamere2);
                   2341:     # remove version if already specified
1.101     www      2342:     $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114     albertel 2343:     # get the bits that go before and after the version number
                   2344:     if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
                   2345: 	$fnamere1=$1;
                   2346: 	$fnamere2='.'.$2;
                   2347:     }
1.101     www      2348:     if (-e $fname) { $version=1; }
                   2349:     if (-e $ulsdir) {
1.134     albertel 2350: 	if(-d $ulsdir) {
                   2351: 	    if (opendir(LSDIR,$ulsdir)) {
                   2352: 		my $ulsfn;
                   2353: 		while ($ulsfn=readdir(LSDIR)) {
1.101     www      2354: # see if this is a regular file (ignore links produced earlier)
1.134     albertel 2355: 		    my $thisfile=$ulsdir.'/'.$ulsfn;
                   2356: 		    unless (-l $thisfile) {
                   2357: 			if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
                   2358: 			    if ($1>$version) { $version=$1; }
                   2359: 			}
                   2360: 		    }
                   2361: 		}
                   2362: 		closedir(LSDIR);
                   2363: 		$version++;
                   2364: 	    }
                   2365: 	}
                   2366:     }
                   2367:     return $version;
1.101     www      2368: }
                   2369: 
                   2370: sub thisversion {
                   2371:     my $fname=shift;
                   2372:     my $version=-1;
                   2373:     if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
                   2374: 	$version=$1;
                   2375:     }
                   2376:     return $version;
                   2377: }
                   2378: 
1.84      albertel 2379: sub subscribe {
                   2380:     my ($userinput,$clientip)=@_;
                   2381:     my $result;
                   2382:     my ($cmd,$fname)=split(/:/,$userinput);
                   2383:     my $ownership=&ishome($fname);
                   2384:     if ($ownership eq 'owner') {
1.101     www      2385: # explitly asking for the current version?
                   2386:         unless (-e $fname) {
                   2387:             my $currentversion=&currentversion($fname);
                   2388: 	    if (&thisversion($fname)==$currentversion) {
                   2389:                 if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
                   2390: 		    my $root=$1;
                   2391:                     my $extension=$2;
                   2392:                     symlink($root.'.'.$extension,
                   2393:                             $root.'.'.$currentversion.'.'.$extension);
1.102     www      2394:                     unless ($extension=~/\.meta$/) {
                   2395:                        symlink($root.'.'.$extension.'.meta',
                   2396:                             $root.'.'.$currentversion.'.'.$extension.'.meta');
                   2397: 		    }
1.101     www      2398:                 }
                   2399:             }
                   2400:         }
1.84      albertel 2401: 	if (-e $fname) {
                   2402: 	    if (-d $fname) {
                   2403: 		$result="directory\n";
                   2404: 	    } else {
                   2405: 		if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1.134     albertel 2406: 		my $now=time;
1.84      albertel 2407: 		my $found=&addline($fname,$hostid{$clientip},$clientip,
                   2408: 				   "$hostid{$clientip}:$clientip:$now\n");
                   2409: 		if ($found) { $result="$fname\n"; }
                   2410: 		# if they were subscribed to only meta data, delete that
                   2411:                 # subscription, when you subscribe to a file you also get
                   2412:                 # the metadata
                   2413: 		unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
                   2414: 		$fname=~s/\/home\/httpd\/html\/res/raw/;
                   2415: 		$fname="http://$thisserver/".$fname;
                   2416: 		$result="$fname\n";
                   2417: 	    }
                   2418: 	} else {
                   2419: 	    $result="not_found\n";
                   2420: 	}
                   2421:     } else {
                   2422: 	$result="rejected\n";
                   2423:     }
                   2424:     return $result;
                   2425: }
1.91      albertel 2426: 
                   2427: sub make_passwd_file {
1.98      foxr     2428:     my ($uname, $umode,$npass,$passfilename)=@_;
1.91      albertel 2429:     my $result="ok\n";
                   2430:     if ($umode eq 'krb4' or $umode eq 'krb5') {
                   2431: 	{
                   2432: 	    my $pf = IO::File->new(">$passfilename");
                   2433: 	    print $pf "$umode:$npass\n";
                   2434: 	}
                   2435:     } elsif ($umode eq 'internal') {
                   2436: 	my $salt=time;
                   2437: 	$salt=substr($salt,6,2);
                   2438: 	my $ncpass=crypt($npass,$salt);
                   2439: 	{
                   2440: 	    &Debug("Creating internal auth");
                   2441: 	    my $pf = IO::File->new(">$passfilename");
                   2442: 	    print $pf "internal:$ncpass\n"; 
                   2443: 	}
                   2444:     } elsif ($umode eq 'localauth') {
                   2445: 	{
                   2446: 	    my $pf = IO::File->new(">$passfilename");
                   2447: 	    print $pf "localauth:$npass\n";
                   2448: 	}
                   2449:     } elsif ($umode eq 'unix') {
                   2450: 	{
                   2451: 	    my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
                   2452: 	    {
                   2453: 		&Debug("Executing external: ".$execpath);
1.98      foxr     2454: 		&Debug("user  = ".$uname.", Password =". $npass);
1.132     matthew  2455: 		my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91      albertel 2456: 		print $se "$uname\n";
                   2457: 		print $se "$npass\n";
                   2458: 		print $se "$npass\n";
1.97      foxr     2459: 	    }
                   2460: 	    my $useraddok = $?;
                   2461: 	    if($useraddok > 0) {
                   2462: 		&logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1.91      albertel 2463: 	    }
                   2464: 	    my $pf = IO::File->new(">$passfilename");
                   2465: 	    print $pf "unix:\n";
                   2466: 	}
                   2467:     } elsif ($umode eq 'none') {
                   2468: 	{
                   2469: 	    my $pf = IO::File->new(">$passfilename");
                   2470: 	    print $pf "none:\n";
                   2471: 	}
                   2472:     } else {
                   2473: 	$result="auth_mode_error\n";
                   2474:     }
                   2475:     return $result;
1.121     albertel 2476: }
                   2477: 
                   2478: sub sethost {
                   2479:     my ($remotereq) = @_;
                   2480:     my (undef,$hostid)=split(/:/,$remotereq);
                   2481:     if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
                   2482:     if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
                   2483: 	$currenthostid=$hostid;
                   2484: 	$currentdomainid=$hostdom{$hostid};
                   2485: 	&logthis("Setting hostid to $hostid, and domain to $currentdomainid");
                   2486:     } else {
                   2487: 	&logthis("Requested host id $hostid not an alias of ".
                   2488: 		 $perlvar{'lonHostID'}." refusing connection");
                   2489: 	return 'unable_to_set';
                   2490:     }
                   2491:     return 'ok';
                   2492: }
                   2493: 
                   2494: sub version {
                   2495:     my ($userinput)=@_;
                   2496:     $remoteVERSION=(split(/:/,$userinput))[1];
                   2497:     return "version:$VERSION";
1.127     albertel 2498: }
                   2499: 
1.128     albertel 2500: #There is a copy of this in lonnet.pm
1.127     albertel 2501: sub userload {
                   2502:     my $numusers=0;
                   2503:     {
                   2504: 	opendir(LONIDS,$perlvar{'lonIDsDir'});
                   2505: 	my $filename;
                   2506: 	my $curtime=time;
                   2507: 	while ($filename=readdir(LONIDS)) {
                   2508: 	    if ($filename eq '.' || $filename eq '..') {next;}
1.138     albertel 2509: 	    my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
                   2510: 	    if ($curtime-$mtime < 3600) { $numusers++; }
1.127     albertel 2511: 	}
                   2512: 	closedir(LONIDS);
                   2513:     }
                   2514:     my $userloadpercent=0;
                   2515:     my $maxuserload=$perlvar{'lonUserLoadLim'};
                   2516:     if ($maxuserload) {
1.129     albertel 2517: 	$userloadpercent=100*$numusers/$maxuserload;
1.127     albertel 2518:     }
1.130     albertel 2519:     $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127     albertel 2520:     return $userloadpercent;
1.91      albertel 2521: }
                   2522: 
1.61      harris41 2523: # ----------------------------------- POD (plain old documentation, CPAN style)
                   2524: 
                   2525: =head1 NAME
                   2526: 
                   2527: lond - "LON Daemon" Server (port "LOND" 5663)
                   2528: 
                   2529: =head1 SYNOPSIS
                   2530: 
1.74      harris41 2531: Usage: B<lond>
                   2532: 
                   2533: Should only be run as user=www.  This is a command-line script which
                   2534: is invoked by B<loncron>.  There is no expectation that a typical user
                   2535: will manually start B<lond> from the command-line.  (In other words,
                   2536: DO NOT START B<lond> YOURSELF.)
1.61      harris41 2537: 
                   2538: =head1 DESCRIPTION
                   2539: 
1.74      harris41 2540: There are two characteristics associated with the running of B<lond>,
                   2541: PROCESS MANAGEMENT (starting, stopping, handling child processes)
                   2542: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
                   2543: subscriptions, etc).  These are described in two large
                   2544: sections below.
                   2545: 
                   2546: B<PROCESS MANAGEMENT>
                   2547: 
1.61      harris41 2548: Preforker - server who forks first. Runs as a daemon. HUPs.
                   2549: Uses IDEA encryption
                   2550: 
1.74      harris41 2551: B<lond> forks off children processes that correspond to the other servers
                   2552: in the network.  Management of these processes can be done at the
                   2553: parent process level or the child process level.
                   2554: 
                   2555: B<logs/lond.log> is the location of log messages.
                   2556: 
                   2557: The process management is now explained in terms of linux shell commands,
                   2558: subroutines internal to this code, and signal assignments:
                   2559: 
                   2560: =over 4
                   2561: 
                   2562: =item *
                   2563: 
                   2564: PID is stored in B<logs/lond.pid>
                   2565: 
                   2566: This is the process id number of the parent B<lond> process.
                   2567: 
                   2568: =item *
                   2569: 
                   2570: SIGTERM and SIGINT
                   2571: 
                   2572: Parent signal assignment:
                   2573:  $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                   2574: 
                   2575: Child signal assignment:
                   2576:  $SIG{INT}  = 'DEFAULT'; (and SIGTERM is DEFAULT also)
                   2577: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
                   2578:  to restart a new child.)
                   2579: 
                   2580: Command-line invocations:
                   2581:  B<kill> B<-s> SIGTERM I<PID>
                   2582:  B<kill> B<-s> SIGINT I<PID>
                   2583: 
                   2584: Subroutine B<HUNTSMAN>:
                   2585:  This is only invoked for the B<lond> parent I<PID>.
                   2586: This kills all the children, and then the parent.
                   2587: The B<lonc.pid> file is cleared.
                   2588: 
                   2589: =item *
                   2590: 
                   2591: SIGHUP
                   2592: 
                   2593: Current bug:
                   2594:  This signal can only be processed the first time
                   2595: on the parent process.  Subsequent SIGHUP signals
                   2596: have no effect.
                   2597: 
                   2598: Parent signal assignment:
                   2599:  $SIG{HUP}  = \&HUPSMAN;
                   2600: 
                   2601: Child signal assignment:
                   2602:  none (nothing happens)
                   2603: 
                   2604: Command-line invocations:
                   2605:  B<kill> B<-s> SIGHUP I<PID>
                   2606: 
                   2607: Subroutine B<HUPSMAN>:
                   2608:  This is only invoked for the B<lond> parent I<PID>,
                   2609: This kills all the children, and then the parent.
                   2610: The B<lond.pid> file is cleared.
                   2611: 
                   2612: =item *
                   2613: 
                   2614: SIGUSR1
                   2615: 
                   2616: Parent signal assignment:
                   2617:  $SIG{USR1} = \&USRMAN;
                   2618: 
                   2619: Child signal assignment:
                   2620:  $SIG{USR1}= \&logstatus;
                   2621: 
                   2622: Command-line invocations:
                   2623:  B<kill> B<-s> SIGUSR1 I<PID>
                   2624: 
                   2625: Subroutine B<USRMAN>:
                   2626:  When invoked for the B<lond> parent I<PID>,
                   2627: SIGUSR1 is sent to all the children, and the status of
                   2628: each connection is logged.
1.144     foxr     2629: 
                   2630: =item *
                   2631: 
                   2632: SIGUSR2
                   2633: 
                   2634: Parent Signal assignment:
                   2635:     $SIG{USR2} = \&UpdateHosts
                   2636: 
                   2637: Child signal assignment:
                   2638:     NONE
                   2639: 
1.74      harris41 2640: 
                   2641: =item *
                   2642: 
                   2643: SIGCHLD
                   2644: 
                   2645: Parent signal assignment:
                   2646:  $SIG{CHLD} = \&REAPER;
                   2647: 
                   2648: Child signal assignment:
                   2649:  none
                   2650: 
                   2651: Command-line invocations:
                   2652:  B<kill> B<-s> SIGCHLD I<PID>
                   2653: 
                   2654: Subroutine B<REAPER>:
                   2655:  This is only invoked for the B<lond> parent I<PID>.
                   2656: Information pertaining to the child is removed.
                   2657: The socket port is cleaned up.
                   2658: 
                   2659: =back
                   2660: 
                   2661: B<SERVER-SIDE ACTIVITIES>
                   2662: 
                   2663: Server-side information can be accepted in an encrypted or non-encrypted
                   2664: method.
                   2665: 
                   2666: =over 4
                   2667: 
                   2668: =item ping
                   2669: 
                   2670: Query a client in the hosts.tab table; "Are you there?"
                   2671: 
                   2672: =item pong
                   2673: 
                   2674: Respond to a ping query.
                   2675: 
                   2676: =item ekey
                   2677: 
                   2678: Read in encrypted key, make cipher.  Respond with a buildkey.
                   2679: 
                   2680: =item load
                   2681: 
                   2682: Respond with CPU load based on a computation upon /proc/loadavg.
                   2683: 
                   2684: =item currentauth
                   2685: 
                   2686: Reply with current authentication information (only over an
                   2687: encrypted channel).
                   2688: 
                   2689: =item auth
                   2690: 
                   2691: Only over an encrypted channel, reply as to whether a user's
                   2692: authentication information can be validated.
                   2693: 
                   2694: =item passwd
                   2695: 
                   2696: Allow for a password to be set.
                   2697: 
                   2698: =item makeuser
                   2699: 
                   2700: Make a user.
                   2701: 
                   2702: =item passwd
                   2703: 
                   2704: Allow for authentication mechanism and password to be changed.
                   2705: 
                   2706: =item home
1.61      harris41 2707: 
1.74      harris41 2708: Respond to a question "are you the home for a given user?"
                   2709: 
                   2710: =item update
                   2711: 
                   2712: Update contents of a subscribed resource.
                   2713: 
                   2714: =item unsubscribe
                   2715: 
                   2716: The server is unsubscribing from a resource.
                   2717: 
                   2718: =item subscribe
                   2719: 
                   2720: The server is subscribing to a resource.
                   2721: 
                   2722: =item log
                   2723: 
                   2724: Place in B<logs/lond.log>
                   2725: 
                   2726: =item put
                   2727: 
                   2728: stores hash in namespace
                   2729: 
                   2730: =item rolesput
                   2731: 
                   2732: put a role into a user's environment
                   2733: 
                   2734: =item get
                   2735: 
                   2736: returns hash with keys from array
                   2737: reference filled in from namespace
                   2738: 
                   2739: =item eget
                   2740: 
                   2741: returns hash with keys from array
                   2742: reference filled in from namesp (encrypts the return communication)
                   2743: 
                   2744: =item rolesget
                   2745: 
                   2746: get a role from a user's environment
                   2747: 
                   2748: =item del
                   2749: 
                   2750: deletes keys out of array from namespace
                   2751: 
                   2752: =item keys
                   2753: 
                   2754: returns namespace keys
                   2755: 
                   2756: =item dump
                   2757: 
                   2758: dumps the complete (or key matching regexp) namespace into a hash
                   2759: 
                   2760: =item store
                   2761: 
                   2762: stores hash permanently
                   2763: for this url; hashref needs to be given and should be a \%hashname; the
                   2764: remaining args aren't required and if they aren't passed or are '' they will
                   2765: be derived from the ENV
                   2766: 
                   2767: =item restore
                   2768: 
                   2769: returns a hash for a given url
                   2770: 
                   2771: =item querysend
                   2772: 
                   2773: Tells client about the lonsql process that has been launched in response
                   2774: to a sent query.
                   2775: 
                   2776: =item queryreply
                   2777: 
                   2778: Accept information from lonsql and make appropriate storage in temporary
                   2779: file space.
                   2780: 
                   2781: =item idput
                   2782: 
                   2783: Defines usernames as corresponding to IDs.  (These "IDs" are unique identifiers
                   2784: for each student, defined perhaps by the institutional Registrar.)
                   2785: 
                   2786: =item idget
                   2787: 
                   2788: Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
                   2789: for each student, defined perhaps by the institutional Registrar.)
                   2790: 
                   2791: =item tmpput
                   2792: 
                   2793: Accept and store information in temporary space.
                   2794: 
                   2795: =item tmpget
                   2796: 
                   2797: Send along temporarily stored information.
                   2798: 
                   2799: =item ls
                   2800: 
                   2801: List part of a user's directory.
                   2802: 
1.135     foxr     2803: =item pushtable
                   2804: 
                   2805: Pushes a file in /home/httpd/lonTab directory.  Currently limited to:
                   2806: hosts.tab and domain.tab. The old file is copied to  *.tab.backup but
                   2807: must be restored manually in case of a problem with the new table file.
                   2808: pushtable requires that the request be encrypted and validated via
                   2809: ValidateManager.  The form of the command is:
                   2810: enc:pushtable tablename <tablecontents> \n
                   2811: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a 
                   2812: cleartext newline.
                   2813: 
1.74      harris41 2814: =item Hanging up (exit or init)
                   2815: 
                   2816: What to do when a client tells the server that they (the client)
                   2817: are leaving the network.
                   2818: 
                   2819: =item unknown command
                   2820: 
                   2821: If B<lond> is sent an unknown command (not in the list above),
                   2822: it replys to the client "unknown_cmd".
1.135     foxr     2823: 
1.74      harris41 2824: 
                   2825: =item UNKNOWN CLIENT
                   2826: 
                   2827: If the anti-spoofing algorithm cannot verify the client,
                   2828: the client is rejected (with a "refused" message sent
                   2829: to the client, and the connection is closed.
                   2830: 
                   2831: =back
1.61      harris41 2832: 
                   2833: =head1 PREREQUISITES
                   2834: 
                   2835: IO::Socket
                   2836: IO::File
                   2837: Apache::File
                   2838: Symbol
                   2839: POSIX
                   2840: Crypt::IDEA
                   2841: LWP::UserAgent()
                   2842: GDBM_File
                   2843: Authen::Krb4
1.91      albertel 2844: Authen::Krb5
1.61      harris41 2845: 
                   2846: =head1 COREQUISITES
                   2847: 
                   2848: =head1 OSNAMES
                   2849: 
                   2850: linux
                   2851: 
                   2852: =head1 SCRIPT CATEGORIES
                   2853: 
                   2854: Server/Process
                   2855: 
                   2856: =cut

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