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