File:
[LON-CAPA] /
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lond
Revision
1.151:
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Fri Oct 3 15:11:03 2003 UTC (20 years, 7 months ago) by
albertel
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MAIN
CVS tags:
HEAD
- if we fail to fetch an update to the file, don't blow away the old one
(this was the BUG that blew away that one default.sequence that Matthew
ended up restoring from data.)
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.151 2003/10/03 15:11:03 albertel 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 1.151 2003/10/03 15:11:03 albertel
64: # - if we fail to fetch an update to the file, don't blow away the old one
65: # (this was the BUG that blew away that one default.sequence that Matthew
66: # ended up restoring from data.)
67: #
68: # Revision 1.150 2003/09/30 10:16:06 foxr
69: # Added invocation of apachereload in ReloadApache sub.
70: # This completes the addtion of the reinit functionality.
71: #
72: # Revision 1.149 2003/09/30 09:44:13 foxr
73: # Tested UpdateHosts ability to
74: # - Remove live children for hosts that are no longer in the hosts.tab
75: # - Remove live children for hosts whose IPs have changed in the hosts.tab
76: #
77: # Revision 1.148 2003/09/29 10:09:18 foxr
78: # Put in logic to reinit lond itself (except for apache reload). I don't believe
79: # this logic works correctly yet, however lond still does everything it used to doso I'll do the commit anyway.
80: #
81: # Revision 1.147 2003/09/23 11:23:31 foxr
82: # Comlplete implementation of reinit functionality. Must still implement
83: # the actual initialization functionality, but the process can now
84: # receive the request and either invoke the appropriate internal function or
85: # signal the correct lonc.
86: #
87: # Revision 1.146 2003/09/16 10:28:14 foxr
88: # ReinitProcess - decode the process selector and produce the associated pid
89: # filename. Note: While it is possible to test that valid process selectors are
90: # handled properly I am not able to test that invalid process selectors produce
91: # the appropriate error as lonManage also blocks the use of invalid process selectors.
92: #
93: # Revision 1.145 2003/09/16 10:13:20 foxr
94: # Added ReinitProcess function to oversee the parsing and processing of the
95: # reinit:<process> client request.
96: #
97: # Revision 1.144 2003/09/16 09:47:01 foxr
98: # Added skeletal support for SIGUSR2 (update hosts.tab)
99: #
100: # Revision 1.143 2003/09/15 10:03:52 foxr
101: # Completed and tested code for pushfile.
102: #
103: # Revision 1.142 2003/09/09 20:47:46 www
104: # Permanently store chatroom entries in chatroom.log
105: #
106: # Revision 1.141 2003/09/08 10:32:07 foxr
107: # Added PushFile sub This sub oversees the push of a new configuration table file
108: # Currently supported files are:
109: # - hosts.tab (transaction pushfile:hosts:contents)
110: # - domain.tab (transaction pushfile:domain:contents)
111: #
112:
113:
114: use strict;
115: use lib '/home/httpd/lib/perl/';
116: use LONCAPA::Configuration;
117:
118: use IO::Socket;
119: use IO::File;
120: #use Apache::File;
121: use Symbol;
122: use POSIX;
123: use Crypt::IDEA;
124: use LWP::UserAgent();
125: use GDBM_File;
126: use Authen::Krb4;
127: use Authen::Krb5;
128: use lib '/home/httpd/lib/perl/';
129: use localauth;
130: use File::Copy;
131:
132: my $DEBUG = 0; # Non zero to enable debug log entries.
133:
134: my $status='';
135: my $lastlog='';
136:
137: my $VERSION='$Revision: 1.151 $'; #' stupid emacs
138: my $remoteVERSION;
139: my $currenthostid;
140: my $currentdomainid;
141:
142: my $client;
143: my $clientip;
144:
145: my $server;
146: my $thisserver;
147:
148: my %hostid;
149: my %hostdom;
150: my %hostip;
151: my %perlvar; # Will have the apache conf defined perl vars.
152:
153: #
154: # The array below are password error strings."
155: #
156: my $lastpwderror = 13; # Largest error number from lcpasswd.
157: my @passwderrors = ("ok",
158: "lcpasswd must be run as user 'www'",
159: "lcpasswd got incorrect number of arguments",
160: "lcpasswd did not get the right nubmer of input text lines",
161: "lcpasswd too many simultaneous pwd changes in progress",
162: "lcpasswd User does not exist.",
163: "lcpasswd Incorrect current passwd",
164: "lcpasswd Unable to su to root.",
165: "lcpasswd Cannot set new passwd.",
166: "lcpasswd Username has invalid characters",
167: "lcpasswd Invalid characters in password",
168: "11", "12",
169: "lcpasswd Password mismatch");
170:
171:
172: # The array below are lcuseradd error strings.:
173:
174: my $lastadderror = 13;
175: my @adderrors = ("ok",
176: "User ID mismatch, lcuseradd must run as user www",
177: "lcuseradd Incorrect number of command line parameters must be 3",
178: "lcuseradd Incorrect number of stdinput lines, must be 3",
179: "lcuseradd Too many other simultaneous pwd changes in progress",
180: "lcuseradd User does not exist",
181: "lcuseradd Unabel to mak ewww member of users's group",
182: "lcuseradd Unable to su to root",
183: "lcuseradd Unable to set password",
184: "lcuseradd Usrname has invbalid charcters",
185: "lcuseradd Password has an invalid character",
186: "lcuseradd User already exists",
187: "lcuseradd Could not add user.",
188: "lcuseradd Password mismatch");
189:
190:
191: #
192: # GetCertificate: Given a transaction that requires a certificate,
193: # this function will extract the certificate from the transaction
194: # request. Note that at this point, the only concept of a certificate
195: # is the hostname to which we are connected.
196: #
197: # Parameter:
198: # request - The request sent by our client (this parameterization may
199: # need to change when we really use a certificate granting
200: # authority.
201: #
202: sub GetCertificate {
203: my $request = shift;
204:
205: return $clientip;
206: }
207:
208:
209: #
210: # ValidManager: Determines if a given certificate represents a valid manager.
211: # in this primitive implementation, the 'certificate' is
212: # just the connecting loncapa client name. This is checked
213: # against a valid client list in the configuration.
214: #
215: #
216: sub ValidManager {
217: my $certificate = shift;
218:
219: my $hostentry = $hostid{$certificate};
220: if ($hostentry ne undef) {
221: &logthis('<font color="yellow">Authenticating manager'.
222: " $hostentry</font>");
223: return 1;
224: } else {
225: &logthis('<font color="red"> Failed manager authentication '.
226: "$certificate </font>");
227: }
228: }
229: #
230: # CopyFile: Called as part of the process of installing a
231: # new configuration file. This function copies an existing
232: # file to a backup file.
233: # Parameters:
234: # oldfile - Name of the file to backup.
235: # newfile - Name of the backup file.
236: # Return:
237: # 0 - Failure (errno has failure reason).
238: # 1 - Success.
239: #
240: sub CopyFile {
241: my $oldfile = shift;
242: my $newfile = shift;
243:
244: # The file must exist:
245:
246: if(-e $oldfile) {
247:
248: # Read the old file.
249:
250: my $oldfh = IO::File->new("< $oldfile");
251: if(!$oldfh) {
252: return 0;
253: }
254: my @contents = <$oldfh>; # Suck in the entire file.
255:
256: # write the backup file:
257:
258: my $newfh = IO::File->new("> $newfile");
259: if(!(defined $newfh)){
260: return 0;
261: }
262: my $lines = scalar @contents;
263: for (my $i =0; $i < $lines; $i++) {
264: print $newfh ($contents[$i]);
265: }
266:
267: $oldfh->close;
268: $newfh->close;
269:
270: chmod(0660, $newfile);
271:
272: return 1;
273:
274: } else {
275: return 0;
276: }
277: }
278:
279: #
280: # InstallFile: Called to install an administrative file:
281: # - The file is created with <name>.tmp
282: # - The <name>.tmp file is then mv'd to <name>
283: # This lugubrious procedure is done to ensure that we are never without
284: # a valid, even if dated, version of the file regardless of who crashes
285: # and when the crash occurs.
286: #
287: # Parameters:
288: # Name of the file
289: # File Contents.
290: # Return:
291: # nonzero - success.
292: # 0 - failure and $! has an errno.
293: #
294: sub InstallFile {
295: my $Filename = shift;
296: my $Contents = shift;
297: my $TempFile = $Filename.".tmp";
298:
299: # Open the file for write:
300:
301: my $fh = IO::File->new("> $TempFile"); # Write to temp.
302: if(!(defined $fh)) {
303: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
304: return 0;
305: }
306: # write the contents of the file:
307:
308: print $fh ($Contents);
309: $fh->close; # In case we ever have a filesystem w. locking
310:
311: chmod(0660, $TempFile);
312:
313: # Now we can move install the file in position.
314:
315: move($TempFile, $Filename);
316:
317: return 1;
318: }
319:
320: #
321: # PushFile: Called to do an administrative push of a file.
322: # - Ensure the file being pushed is one we support.
323: # - Backup the old file to <filename.saved>
324: # - Separate the contents of the new file out from the
325: # rest of the request.
326: # - Write the new file.
327: # Parameter:
328: # Request - The entire user request. This consists of a : separated
329: # string pushfile:tablename:contents.
330: # NOTE: The contents may have :'s in it as well making things a bit
331: # more interesting... but not much.
332: # Returns:
333: # String to send to client ("ok" or "refused" if bad file).
334: #
335: sub PushFile {
336: my $request = shift;
337: my ($command, $filename, $contents) = split(":", $request, 3);
338:
339: # At this point in time, pushes for only the following tables are
340: # supported:
341: # hosts.tab ($filename eq host).
342: # domain.tab ($filename eq domain).
343: # Construct the destination filename or reject the request.
344: #
345: # lonManage is supposed to ensure this, however this session could be
346: # part of some elaborate spoof that managed somehow to authenticate.
347: #
348:
349: my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
350: if ($filename eq "host") {
351: $tablefile .= "hosts.tab";
352: } elsif ($filename eq "domain") {
353: $tablefile .= "domain.tab";
354: } else {
355: return "refused";
356: }
357: #
358: # >copy< the old table to the backup table
359: # don't rename in case system crashes/reboots etc. in the time
360: # window between a rename and write.
361: #
362: my $backupfile = $tablefile;
363: $backupfile =~ s/\.tab$/.old/;
364: if(!CopyFile($tablefile, $backupfile)) {
365: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
366: return "error:$!";
367: }
368: &logthis('<font color="green"> Pushfile: backed up '
369: .$tablefile." to $backupfile</font>");
370:
371: # Install the new file:
372:
373: if(!InstallFile($tablefile, $contents)) {
374: &logthis('<font color="red"> Pushfile: unable to install '
375: .$tablefile." $! </font>");
376: return "error:$!";
377: }
378: else {
379: &logthis('<font color="green"> Installed new '.$tablefile
380: ."</font>");
381:
382: }
383:
384:
385: # Indicate success:
386:
387: return "ok";
388:
389: }
390:
391: #
392: # Called to re-init either lonc or lond.
393: #
394: # Parameters:
395: # request - The full request by the client. This is of the form
396: # reinit:<process>
397: # where <process> is allowed to be either of
398: # lonc or lond
399: #
400: # Returns:
401: # The string to be sent back to the client either:
402: # ok - Everything worked just fine.
403: # error:why - There was a failure and why describes the reason.
404: #
405: #
406: sub ReinitProcess {
407: my $request = shift;
408:
409:
410: # separate the request (reinit) from the process identifier and
411: # validate it producing the name of the .pid file for the process.
412: #
413: #
414: my ($junk, $process) = split(":", $request);
415: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
416: if($process eq 'lonc') {
417: $processpidfile = $processpidfile."lonc.pid";
418: if (!open(PIDFILE, "< $processpidfile")) {
419: return "error:Open failed for $processpidfile";
420: }
421: my $loncpid = <PIDFILE>;
422: close(PIDFILE);
423: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
424: ."</font>");
425: kill("USR2", $loncpid);
426: } elsif ($process eq 'lond') {
427: logthis('<font color="red"> Reinitializing self (lond) </font>');
428: &UpdateHosts; # Lond is us!!
429: } else {
430: &logthis('<font color="yellow" Invalid reinit request for '.$process
431: ."</font>");
432: return "error:Invalid process identifier $process";
433: }
434: return 'ok';
435: }
436:
437: #
438: # Convert an error return code from lcpasswd to a string value.
439: #
440: sub lcpasswdstrerror {
441: my $ErrorCode = shift;
442: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
443: return "lcpasswd Unrecognized error return value ".$ErrorCode;
444: } else {
445: return $passwderrors[$ErrorCode];
446: }
447: }
448:
449: #
450: # Convert an error return code from lcuseradd to a string value:
451: #
452: sub lcuseraddstrerror {
453: my $ErrorCode = shift;
454: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
455: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
456: } else {
457: return $adderrors[$ErrorCode];
458: }
459: }
460:
461: # grabs exception and records it to log before exiting
462: sub catchexception {
463: my ($error)=@_;
464: $SIG{'QUIT'}='DEFAULT';
465: $SIG{__DIE__}='DEFAULT';
466: &logthis("<font color=red>CRITICAL: "
467: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
468: ."a crash with this error msg->[$error]</font>");
469: &logthis('Famous last words: '.$status.' - '.$lastlog);
470: if ($client) { print $client "error: $error\n"; }
471: $server->close();
472: die($error);
473: }
474:
475: sub timeout {
476: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
477: &catchexception('Timeout');
478: }
479: # -------------------------------- Set signal handlers to record abnormal exits
480:
481: $SIG{'QUIT'}=\&catchexception;
482: $SIG{__DIE__}=\&catchexception;
483:
484: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
485: &status("Read loncapa.conf and loncapa_apache.conf");
486: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
487: %perlvar=%{$perlvarref};
488: undef $perlvarref;
489:
490: # ----------------------------- Make sure this process is running from user=www
491: my $wwwid=getpwnam('www');
492: if ($wwwid!=$<) {
493: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
494: my $subj="LON: $currenthostid User ID mismatch";
495: system("echo 'User ID mismatch. lond must be run as user www.' |\
496: mailto $emailto -s '$subj' > /dev/null");
497: exit 1;
498: }
499:
500: # --------------------------------------------- Check if other instance running
501:
502: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
503:
504: if (-e $pidfile) {
505: my $lfh=IO::File->new("$pidfile");
506: my $pide=<$lfh>;
507: chomp($pide);
508: if (kill 0 => $pide) { die "already running"; }
509: }
510:
511: # ------------------------------------------------------------- Read hosts file
512:
513:
514:
515: # establish SERVER socket, bind and listen.
516: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
517: Type => SOCK_STREAM,
518: Proto => 'tcp',
519: Reuse => 1,
520: Listen => 10 )
521: or die "making socket: $@\n";
522:
523: # --------------------------------------------------------- Do global variables
524:
525: # global variables
526:
527: my %children = (); # keys are current child process IDs
528: my $children = 0; # current number of children
529:
530: sub REAPER { # takes care of dead children
531: $SIG{CHLD} = \&REAPER;
532: my $pid = wait;
533: if (defined($children{$pid})) {
534: &logthis("Child $pid died");
535: $children --;
536: delete $children{$pid};
537: } else {
538: &logthis("Unknown Child $pid died");
539: }
540: }
541:
542: sub HUNTSMAN { # signal handler for SIGINT
543: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
544: kill 'INT' => keys %children;
545: &logthis("Free socket: ".shutdown($server,2)); # free up socket
546: my $execdir=$perlvar{'lonDaemons'};
547: unlink("$execdir/logs/lond.pid");
548: &logthis("<font color=red>CRITICAL: Shutting down</font>");
549: exit; # clean up with dignity
550: }
551:
552: sub HUPSMAN { # signal handler for SIGHUP
553: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
554: kill 'INT' => keys %children;
555: &logthis("Free socket: ".shutdown($server,2)); # free up socket
556: &logthis("<font color=red>CRITICAL: Restarting</font>");
557: my $execdir=$perlvar{'lonDaemons'};
558: unlink("$execdir/logs/lond.pid");
559: exec("$execdir/lond"); # here we go again
560: }
561:
562: #
563: # Kill off hashes that describe the host table prior to re-reading it.
564: # Hashes affected are:
565: # %hostid, %hostdom %hostip
566: #
567: sub KillHostHashes {
568: foreach my $key (keys %hostid) {
569: delete $hostid{$key};
570: }
571: foreach my $key (keys %hostdom) {
572: delete $hostdom{$key};
573: }
574: foreach my $key (keys %hostip) {
575: delete $hostip{$key};
576: }
577: }
578: #
579: # Read in the host table from file and distribute it into the various hashes:
580: #
581: # - %hostid - Indexed by IP, the loncapa hostname.
582: # - %hostdom - Indexed by loncapa hostname, the domain.
583: # - %hostip - Indexed by hostid, the Ip address of the host.
584: sub ReadHostTable {
585:
586: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
587:
588: while (my $configline=<CONFIG>) {
589: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
590: chomp($ip); $ip=~s/\D+$//;
591: $hostid{$ip}=$id;
592: $hostdom{$id}=$domain;
593: $hostip{$id}=$ip;
594: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
595: }
596: close(CONFIG);
597: }
598: #
599: # Reload the Apache daemon's state.
600: # This is done by invoking /home/httpd/perl/apachereload
601: # a setuid perl script that can be root for us to do this job.
602: #
603: sub ReloadApache {
604: my $execdir = $perlvar{'lonDaemons'};
605: my $script = $execdir."/apachereload";
606: system($script);
607: }
608:
609: #
610: # Called in response to a USR2 signal.
611: # - Reread hosts.tab
612: # - All children connected to hosts that were removed from hosts.tab
613: # are killed via SIGINT
614: # - All children connected to previously existing hosts are sent SIGUSR1
615: # - Our internal hosts hash is updated to reflect the new contents of
616: # hosts.tab causing connections from hosts added to hosts.tab to
617: # now be honored.
618: #
619: sub UpdateHosts {
620: logthis('<font color="blue"> Updating connections </font>');
621: #
622: # The %children hash has the set of IP's we currently have children
623: # on. These need to be matched against records in the hosts.tab
624: # Any ip's no longer in the table get killed off they correspond to
625: # either dropped or changed hosts. Note that the re-read of the table
626: # will take care of new and changed hosts as connections come into being.
627:
628:
629: KillHostHashes;
630: ReadHostTable;
631:
632: foreach my $child (keys %children) {
633: my $childip = $children{$child};
634: if(!$hostid{$childip}) {
635: logthis('<font color="blue"> UpdateHosts killing child '
636: ." $child for ip $childip </font>");
637: kill('INT', $child);
638: } else {
639: logthis('<font color="green"> keeping child for ip '
640: ." $childip (pid=$child) </font>");
641: }
642: }
643: ReloadApache;
644: }
645:
646:
647: sub checkchildren {
648: &initnewstatus();
649: &logstatus();
650: &logthis('Going to check on the children');
651: my $docdir=$perlvar{'lonDocRoot'};
652: foreach (sort keys %children) {
653: sleep 1;
654: unless (kill 'USR1' => $_) {
655: &logthis ('Child '.$_.' is dead');
656: &logstatus($$.' is dead');
657: }
658: }
659: sleep 5;
660: $SIG{ALRM} = sub { die "timeout" };
661: $SIG{__DIE__} = 'DEFAULT';
662: foreach (sort keys %children) {
663: unless (-e "$docdir/lon-status/londchld/$_.txt") {
664: eval {
665: alarm(300);
666: &logthis('Child '.$_.' did not respond');
667: kill 9 => $_;
668: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
669: #$subj="LON: $currenthostid killed lond process $_";
670: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
671: #$execdir=$perlvar{'lonDaemons'};
672: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
673: alarm(0);
674: }
675: }
676: }
677: $SIG{ALRM} = 'DEFAULT';
678: $SIG{__DIE__} = \&cathcexception;
679: }
680:
681: # --------------------------------------------------------------------- Logging
682:
683: sub logthis {
684: my $message=shift;
685: my $execdir=$perlvar{'lonDaemons'};
686: my $fh=IO::File->new(">>$execdir/logs/lond.log");
687: my $now=time;
688: my $local=localtime($now);
689: $lastlog=$local.': '.$message;
690: print $fh "$local ($$): $message\n";
691: }
692:
693: # ------------------------- Conditional log if $DEBUG true.
694: sub Debug {
695: my $message = shift;
696: if($DEBUG) {
697: &logthis($message);
698: }
699: }
700: # ------------------------------------------------------------------ Log status
701:
702: sub logstatus {
703: my $docdir=$perlvar{'lonDocRoot'};
704: {
705: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
706: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
707: $fh->close();
708: }
709: {
710: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
711: print $fh $status."\n".$lastlog."\n".time;
712: $fh->close();
713: }
714: }
715:
716: sub initnewstatus {
717: my $docdir=$perlvar{'lonDocRoot'};
718: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
719: my $now=time;
720: my $local=localtime($now);
721: print $fh "LOND status $local - parent $$\n\n";
722: opendir(DIR,"$docdir/lon-status/londchld");
723: while (my $filename=readdir(DIR)) {
724: unlink("$docdir/lon-status/londchld/$filename");
725: }
726: closedir(DIR);
727: }
728:
729: # -------------------------------------------------------------- Status setting
730:
731: sub status {
732: my $what=shift;
733: my $now=time;
734: my $local=localtime($now);
735: $status=$local.': '.$what;
736: $0='lond: '.$what.' '.$local;
737: }
738:
739: # -------------------------------------------------------- Escape Special Chars
740:
741: sub escape {
742: my $str=shift;
743: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
744: return $str;
745: }
746:
747: # ----------------------------------------------------- Un-Escape Special Chars
748:
749: sub unescape {
750: my $str=shift;
751: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
752: return $str;
753: }
754:
755: # ----------------------------------------------------------- Send USR1 to lonc
756:
757: sub reconlonc {
758: my $peerfile=shift;
759: &logthis("Trying to reconnect for $peerfile");
760: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
761: if (my $fh=IO::File->new("$loncfile")) {
762: my $loncpid=<$fh>;
763: chomp($loncpid);
764: if (kill 0 => $loncpid) {
765: &logthis("lonc at pid $loncpid responding, sending USR1");
766: kill USR1 => $loncpid;
767: } else {
768: &logthis(
769: "<font color=red>CRITICAL: "
770: ."lonc at pid $loncpid not responding, giving up</font>");
771: }
772: } else {
773: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
774: }
775: }
776:
777: # -------------------------------------------------- Non-critical communication
778:
779: sub subreply {
780: my ($cmd,$server)=@_;
781: my $peerfile="$perlvar{'lonSockDir'}/$server";
782: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
783: Type => SOCK_STREAM,
784: Timeout => 10)
785: or return "con_lost";
786: print $sclient "$cmd\n";
787: my $answer=<$sclient>;
788: chomp($answer);
789: if (!$answer) { $answer="con_lost"; }
790: return $answer;
791: }
792:
793: sub reply {
794: my ($cmd,$server)=@_;
795: my $answer;
796: if ($server ne $currenthostid) {
797: $answer=subreply($cmd,$server);
798: if ($answer eq 'con_lost') {
799: $answer=subreply("ping",$server);
800: if ($answer ne $server) {
801: &logthis("sub reply: answer != server answer is $answer, server is $server");
802: &reconlonc("$perlvar{'lonSockDir'}/$server");
803: }
804: $answer=subreply($cmd,$server);
805: }
806: } else {
807: $answer='self_reply';
808: }
809: return $answer;
810: }
811:
812: # -------------------------------------------------------------- Talk to lonsql
813:
814: sub sqlreply {
815: my ($cmd)=@_;
816: my $answer=subsqlreply($cmd);
817: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
818: return $answer;
819: }
820:
821: sub subsqlreply {
822: my ($cmd)=@_;
823: my $unixsock="mysqlsock";
824: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
825: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
826: Type => SOCK_STREAM,
827: Timeout => 10)
828: or return "con_lost";
829: print $sclient "$cmd\n";
830: my $answer=<$sclient>;
831: chomp($answer);
832: if (!$answer) { $answer="con_lost"; }
833: return $answer;
834: }
835:
836: # -------------------------------------------- Return path to profile directory
837:
838: sub propath {
839: my ($udom,$uname)=@_;
840: $udom=~s/\W//g;
841: $uname=~s/\W//g;
842: my $subdir=$uname.'__';
843: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
844: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
845: return $proname;
846: }
847:
848: # --------------------------------------- Is this the home server of an author?
849:
850: sub ishome {
851: my $author=shift;
852: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
853: my ($udom,$uname)=split(/\//,$author);
854: my $proname=propath($udom,$uname);
855: if (-e $proname) {
856: return 'owner';
857: } else {
858: return 'not_owner';
859: }
860: }
861:
862: # ======================================================= Continue main program
863: # ---------------------------------------------------- Fork once and dissociate
864:
865: my $fpid=fork;
866: exit if $fpid;
867: die "Couldn't fork: $!" unless defined ($fpid);
868:
869: POSIX::setsid() or die "Can't start new session: $!";
870:
871: # ------------------------------------------------------- Write our PID on disk
872:
873: my $execdir=$perlvar{'lonDaemons'};
874: open (PIDSAVE,">$execdir/logs/lond.pid");
875: print PIDSAVE "$$\n";
876: close(PIDSAVE);
877: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
878: &status('Starting');
879:
880:
881:
882: # ----------------------------------------------------- Install signal handlers
883:
884:
885: $SIG{CHLD} = \&REAPER;
886: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
887: $SIG{HUP} = \&HUPSMAN;
888: $SIG{USR1} = \&checkchildren;
889: $SIG{USR2} = \&UpdateHosts;
890:
891: # Read the host hashes:
892:
893: ReadHostTable;
894:
895: # --------------------------------------------------------------
896: # Accept connections. When a connection comes in, it is validated
897: # and if good, a child process is created to process transactions
898: # along the connection.
899:
900: while (1) {
901: $client = $server->accept() or next;
902: make_new_child($client);
903: }
904:
905: sub make_new_child {
906: my $pid;
907: my $cipher;
908: my $sigset;
909:
910: $client = shift;
911: &logthis("Attempting to start child");
912: # block signal for fork
913: $sigset = POSIX::SigSet->new(SIGINT);
914: sigprocmask(SIG_BLOCK, $sigset)
915: or die "Can't block SIGINT for fork: $!\n";
916:
917: die "fork: $!" unless defined ($pid = fork);
918:
919: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
920: # connection liveness.
921:
922: #
923: # Figure out who we're talking to so we can record the peer in
924: # the pid hash.
925: #
926: my $caller = getpeername($client);
927: my ($port,$iaddr)=unpack_sockaddr_in($caller);
928: $clientip=inet_ntoa($iaddr);
929:
930: if ($pid) {
931: # Parent records the child's birth and returns.
932: sigprocmask(SIG_UNBLOCK, $sigset)
933: or die "Can't unblock SIGINT for fork: $!\n";
934: $children{$pid} = $clientip;
935: $children++;
936: &status('Started child '.$pid);
937: return;
938: } else {
939: # Child can *not* return from this subroutine.
940: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
941: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
942: #don't get intercepted
943: $SIG{USR1}= \&logstatus;
944: $SIG{ALRM}= \&timeout;
945: $lastlog='Forked ';
946: $status='Forked';
947:
948: # unblock signals
949: sigprocmask(SIG_UNBLOCK, $sigset)
950: or die "Can't unblock SIGINT for fork: $!\n";
951:
952: my $tmpsnum=0;
953: #---------------------------------------------------- kerberos 5 initialization
954: &Authen::Krb5::init_context();
955: &Authen::Krb5::init_ets();
956:
957: &status('Accepted connection');
958: # =============================================================================
959: # do something with the connection
960: # -----------------------------------------------------------------------------
961: # see if we know client and check for spoof IP by challenge
962:
963: my $clientrec=($hostid{$clientip} ne undef);
964: &logthis(
965: "<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
966: );
967: &status("Connecting $clientip ($hostid{$clientip})");
968: my $clientok;
969: if ($clientrec) {
970: &status("Waiting for init from $clientip ($hostid{$clientip})");
971: my $remotereq=<$client>;
972: $remotereq=~s/[^\w:]//g;
973: if ($remotereq =~ /^init/) {
974: &sethost("sethost:$perlvar{'lonHostID'}");
975: my $challenge="$$".time;
976: print $client "$challenge\n";
977: &status(
978: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
979: $remotereq=<$client>;
980: $remotereq=~s/\W//g;
981: if ($challenge eq $remotereq) {
982: $clientok=1;
983: print $client "ok\n";
984: } else {
985: &logthis(
986: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
987: &status('No challenge reply '.$clientip);
988: }
989: } else {
990: &logthis(
991: "<font color=blue>WARNING: "
992: ."$clientip failed to initialize: >$remotereq< </font>");
993: &status('No init '.$clientip);
994: }
995: } else {
996: &logthis(
997: "<font color=blue>WARNING: Unknown client $clientip</font>");
998: &status('Hung up on '.$clientip);
999: }
1000: if ($clientok) {
1001: # ---------------- New known client connecting, could mean machine online again
1002:
1003: foreach my $id (keys(%hostip)) {
1004: if ($hostip{$id} ne $clientip ||
1005: $hostip{$currenthostid} eq $clientip) {
1006: # no need to try to do recon's to myself
1007: next;
1008: }
1009: &reconlonc("$perlvar{'lonSockDir'}/$id");
1010: }
1011: &logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
1012: &status('Will listen to '.$hostid{$clientip});
1013: # ------------------------------------------------------------ Process requests
1014: while (my $userinput=<$client>) {
1015: chomp($userinput);
1016: Debug("Request = $userinput\n");
1017: &status('Processing '.$hostid{$clientip}.': '.$userinput);
1018: my $wasenc=0;
1019: alarm(120);
1020: # ------------------------------------------------------------ See if encrypted
1021: if ($userinput =~ /^enc/) {
1022: if ($cipher) {
1023: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
1024: $userinput='';
1025: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
1026: $userinput.=
1027: $cipher->decrypt(
1028: pack("H16",substr($encinput,$encidx,16))
1029: );
1030: }
1031: $userinput=substr($userinput,0,$cmdlength);
1032: $wasenc=1;
1033: }
1034: }
1035:
1036: # ------------------------------------------------------------- Normal commands
1037: # ------------------------------------------------------------------------ ping
1038: if ($userinput =~ /^ping/) {
1039: print $client "$currenthostid\n";
1040: # ------------------------------------------------------------------------ pong
1041: }elsif ($userinput =~ /^pong/) {
1042: my $reply=&reply("ping",$hostid{$clientip});
1043: print $client "$currenthostid:$reply\n";
1044: # ------------------------------------------------------------------------ ekey
1045: } elsif ($userinput =~ /^ekey/) {
1046: my $buildkey=time.$$.int(rand 100000);
1047: $buildkey=~tr/1-6/A-F/;
1048: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1049: my $key=$currenthostid.$hostid{$clientip};
1050: $key=~tr/a-z/A-Z/;
1051: $key=~tr/G-P/0-9/;
1052: $key=~tr/Q-Z/0-9/;
1053: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1054: $key=substr($key,0,32);
1055: my $cipherkey=pack("H32",$key);
1056: $cipher=new IDEA $cipherkey;
1057: print $client "$buildkey\n";
1058: # ------------------------------------------------------------------------ load
1059: } elsif ($userinput =~ /^load/) {
1060: my $loadavg;
1061: {
1062: my $loadfile=IO::File->new('/proc/loadavg');
1063: $loadavg=<$loadfile>;
1064: }
1065: $loadavg =~ s/\s.*//g;
1066: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1067: print $client "$loadpercent\n";
1068: # -------------------------------------------------------------------- userload
1069: } elsif ($userinput =~ /^userload/) {
1070: my $userloadpercent=&userload();
1071: print $client "$userloadpercent\n";
1072:
1073: #
1074: # Transactions requiring encryption:
1075: #
1076: # ----------------------------------------------------------------- currentauth
1077: } elsif ($userinput =~ /^currentauth/) {
1078: if ($wasenc==1) {
1079: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1080: my $result = GetAuthType($udom, $uname);
1081: if($result eq "nouser") {
1082: print $client "unknown_user\n";
1083: }
1084: else {
1085: print $client "$result\n"
1086: }
1087: } else {
1088: print $client "refused\n";
1089: }
1090: #--------------------------------------------------------------------- pushfile
1091: } elsif($userinput =~ /^pushfile/) {
1092: if($wasenc == 1) {
1093: my $cert = GetCertificate($userinput);
1094: if(ValidManager($cert)) {
1095: my $reply = PushFile($userinput);
1096: print $client "$reply\n";
1097: } else {
1098: print $client "refused\n";
1099: }
1100: } else {
1101: print $client "refused\n";
1102: }
1103: #--------------------------------------------------------------------- reinit
1104: } elsif($userinput =~ /^reinit/) {
1105: if ($wasenc == 1) {
1106: my $cert = GetCertificate($userinput);
1107: if(ValidManager($cert)) {
1108: chomp($userinput);
1109: my $reply = ReinitProcess($userinput);
1110: print $client "$reply\n";
1111: } else {
1112: print $client "refused\n";
1113: }
1114: } else {
1115: print $client "refused\n";
1116: }
1117: # ------------------------------------------------------------------------ auth
1118: } elsif ($userinput =~ /^auth/) {
1119: if ($wasenc==1) {
1120: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1121: chomp($upass);
1122: $upass=unescape($upass);
1123: my $proname=propath($udom,$uname);
1124: my $passfilename="$proname/passwd";
1125: if (-e $passfilename) {
1126: my $pf = IO::File->new($passfilename);
1127: my $realpasswd=<$pf>;
1128: chomp($realpasswd);
1129: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1130: my $pwdcorrect=0;
1131: if ($howpwd eq 'internal') {
1132: &Debug("Internal auth");
1133: $pwdcorrect=
1134: (crypt($upass,$contentpwd) eq $contentpwd);
1135: } elsif ($howpwd eq 'unix') {
1136: &Debug("Unix auth");
1137: if((getpwnam($uname))[1] eq "") { #no such user!
1138: $pwdcorrect = 0;
1139: } else {
1140: $contentpwd=(getpwnam($uname))[1];
1141: my $pwauth_path="/usr/local/sbin/pwauth";
1142: unless ($contentpwd eq 'x') {
1143: $pwdcorrect=
1144: (crypt($upass,$contentpwd) eq
1145: $contentpwd);
1146: }
1147:
1148: elsif (-e $pwauth_path) {
1149: open PWAUTH, "|$pwauth_path" or
1150: die "Cannot invoke authentication";
1151: print PWAUTH "$uname\n$upass\n";
1152: close PWAUTH;
1153: $pwdcorrect=!$?;
1154: }
1155: }
1156: } elsif ($howpwd eq 'krb4') {
1157: my $null=pack("C",0);
1158: unless ($upass=~/$null/) {
1159: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1160: ($uname,"",$contentpwd,'krbtgt',
1161: $contentpwd,1,$upass);
1162: if (!$krb4_error) {
1163: $pwdcorrect = 1;
1164: } else {
1165: $pwdcorrect=0;
1166: # log error if it is not a bad password
1167: if ($krb4_error != 62) {
1168: &logthis('krb4:'.$uname.','.$contentpwd.','.
1169: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1170: }
1171: }
1172: }
1173: } elsif ($howpwd eq 'krb5') {
1174: my $null=pack("C",0);
1175: unless ($upass=~/$null/) {
1176: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1177: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1178: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1179: my $credentials=&Authen::Krb5::cc_default();
1180: $credentials->initialize($krbclient);
1181: my $krbreturn =
1182: &Authen::Krb5::get_in_tkt_with_password(
1183: $krbclient,$krbserver,$upass,$credentials);
1184: # unless ($krbreturn) {
1185: # &logthis("Krb5 Error: ".
1186: # &Authen::Krb5::error());
1187: # }
1188: $pwdcorrect = ($krbreturn == 1);
1189: } else { $pwdcorrect=0; }
1190: } elsif ($howpwd eq 'localauth') {
1191: $pwdcorrect=&localauth::localauth($uname,$upass,
1192: $contentpwd);
1193: }
1194: if ($pwdcorrect) {
1195: print $client "authorized\n";
1196: } else {
1197: print $client "non_authorized\n";
1198: }
1199: } else {
1200: print $client "unknown_user\n";
1201: }
1202: } else {
1203: print $client "refused\n";
1204: }
1205: # ---------------------------------------------------------------------- passwd
1206: } elsif ($userinput =~ /^passwd/) {
1207: if ($wasenc==1) {
1208: my
1209: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1210: chomp($npass);
1211: $upass=&unescape($upass);
1212: $npass=&unescape($npass);
1213: &Debug("Trying to change password for $uname");
1214: my $proname=propath($udom,$uname);
1215: my $passfilename="$proname/passwd";
1216: if (-e $passfilename) {
1217: my $realpasswd;
1218: { my $pf = IO::File->new($passfilename);
1219: $realpasswd=<$pf>; }
1220: chomp($realpasswd);
1221: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1222: if ($howpwd eq 'internal') {
1223: &Debug("internal auth");
1224: if (crypt($upass,$contentpwd) eq $contentpwd) {
1225: my $salt=time;
1226: $salt=substr($salt,6,2);
1227: my $ncpass=crypt($npass,$salt);
1228: {
1229: my $pf;
1230: if ($pf = IO::File->new(">$passfilename")) {
1231: print $pf "internal:$ncpass\n";
1232: &logthis("Result of password change for $uname: pwchange_success");
1233: print $client "ok\n";
1234: } else {
1235: &logthis("Unable to open $uname passwd to change password");
1236: print $client "non_authorized\n";
1237: }
1238: }
1239:
1240: } else {
1241: print $client "non_authorized\n";
1242: }
1243: } elsif ($howpwd eq 'unix') {
1244: # Unix means we have to access /etc/password
1245: # one way or another.
1246: # First: Make sure the current password is
1247: # correct
1248: &Debug("auth is unix");
1249: $contentpwd=(getpwnam($uname))[1];
1250: my $pwdcorrect = "0";
1251: my $pwauth_path="/usr/local/sbin/pwauth";
1252: unless ($contentpwd eq 'x') {
1253: $pwdcorrect=
1254: (crypt($upass,$contentpwd) eq $contentpwd);
1255: } elsif (-e $pwauth_path) {
1256: open PWAUTH, "|$pwauth_path" or
1257: die "Cannot invoke authentication";
1258: print PWAUTH "$uname\n$upass\n";
1259: close PWAUTH;
1260: &Debug("exited pwauth with $? ($uname,$upass) ");
1261: $pwdcorrect=($? == 0);
1262: }
1263: if ($pwdcorrect) {
1264: my $execdir=$perlvar{'lonDaemons'};
1265: &Debug("Opening lcpasswd pipeline");
1266: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1267: print $pf "$uname\n$npass\n$npass\n";
1268: close $pf;
1269: my $err = $?;
1270: my $result = ($err>0 ? 'pwchange_failure'
1271: : 'ok');
1272: &logthis("Result of password change for $uname: ".
1273: &lcpasswdstrerror($?));
1274: print $client "$result\n";
1275: } else {
1276: print $client "non_authorized\n";
1277: }
1278: } else {
1279: print $client "auth_mode_error\n";
1280: }
1281: } else {
1282: print $client "unknown_user\n";
1283: }
1284: } else {
1285: print $client "refused\n";
1286: }
1287: # -------------------------------------------------------------------- makeuser
1288: } elsif ($userinput =~ /^makeuser/) {
1289: &Debug("Make user received");
1290: my $oldumask=umask(0077);
1291: if ($wasenc==1) {
1292: my
1293: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1294: &Debug("cmd =".$cmd." $udom =".$udom.
1295: " uname=".$uname);
1296: chomp($npass);
1297: $npass=&unescape($npass);
1298: my $proname=propath($udom,$uname);
1299: my $passfilename="$proname/passwd";
1300: &Debug("Password file created will be:".
1301: $passfilename);
1302: if (-e $passfilename) {
1303: print $client "already_exists\n";
1304: } elsif ($udom ne $currentdomainid) {
1305: print $client "not_right_domain\n";
1306: } else {
1307: my @fpparts=split(/\//,$proname);
1308: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1309: my $fperror='';
1310: for (my $i=3;$i<=$#fpparts;$i++) {
1311: $fpnow.='/'.$fpparts[$i];
1312: unless (-e $fpnow) {
1313: unless (mkdir($fpnow,0777)) {
1314: $fperror="error: ".($!+0)
1315: ." mkdir failed while attempting "
1316: ."makeuser\n";
1317: }
1318: }
1319: }
1320: unless ($fperror) {
1321: my $result=&make_passwd_file($uname, $umode,$npass,
1322: $passfilename);
1323: print $client $result;
1324: } else {
1325: print $client "$fperror\n";
1326: }
1327: }
1328: } else {
1329: print $client "refused\n";
1330: }
1331: umask($oldumask);
1332: # -------------------------------------------------------------- changeuserauth
1333: } elsif ($userinput =~ /^changeuserauth/) {
1334: &Debug("Changing authorization");
1335: if ($wasenc==1) {
1336: my
1337: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1338: chomp($npass);
1339: &Debug("cmd = ".$cmd." domain= ".$udom.
1340: "uname =".$uname." umode= ".$umode);
1341: $npass=&unescape($npass);
1342: my $proname=&propath($udom,$uname);
1343: my $passfilename="$proname/passwd";
1344: if ($udom ne $currentdomainid) {
1345: print $client "not_right_domain\n";
1346: } else {
1347: my $result=&make_passwd_file($uname, $umode,$npass,
1348: $passfilename);
1349: print $client $result;
1350: }
1351: } else {
1352: print $client "refused\n";
1353: }
1354: # ------------------------------------------------------------------------ home
1355: } elsif ($userinput =~ /^home/) {
1356: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1357: chomp($uname);
1358: my $proname=propath($udom,$uname);
1359: if (-e $proname) {
1360: print $client "found\n";
1361: } else {
1362: print $client "not_found\n";
1363: }
1364: # ---------------------------------------------------------------------- update
1365: } elsif ($userinput =~ /^update/) {
1366: my ($cmd,$fname)=split(/:/,$userinput);
1367: my $ownership=ishome($fname);
1368: if ($ownership eq 'not_owner') {
1369: if (-e $fname) {
1370: my ($dev,$ino,$mode,$nlink,
1371: $uid,$gid,$rdev,$size,
1372: $atime,$mtime,$ctime,
1373: $blksize,$blocks)=stat($fname);
1374: my $now=time;
1375: my $since=$now-$atime;
1376: if ($since>$perlvar{'lonExpire'}) {
1377: my $reply=
1378: &reply("unsub:$fname","$hostid{$clientip}");
1379: unlink("$fname");
1380: } else {
1381: my $transname="$fname.in.transfer";
1382: my $remoteurl=
1383: reply("sub:$fname","$hostid{$clientip}");
1384: my $response;
1385: {
1386: my $ua=new LWP::UserAgent;
1387: my $request=new HTTP::Request('GET',"$remoteurl");
1388: $response=$ua->request($request,$transname);
1389: }
1390: if ($response->is_error()) {
1391: unlink($transname);
1392: my $message=$response->status_line;
1393: &logthis(
1394: "LWP GET: $message for $fname ($remoteurl)");
1395: } else {
1396: if ($remoteurl!~/\.meta$/) {
1397: my $ua=new LWP::UserAgent;
1398: my $mrequest=
1399: new HTTP::Request('GET',$remoteurl.'.meta');
1400: my $mresponse=
1401: $ua->request($mrequest,$fname.'.meta');
1402: if ($mresponse->is_error()) {
1403: unlink($fname.'.meta');
1404: }
1405: }
1406: rename($transname,$fname);
1407: }
1408: }
1409: print $client "ok\n";
1410: } else {
1411: print $client "not_found\n";
1412: }
1413: } else {
1414: print $client "rejected\n";
1415: }
1416: # -------------------------------------- fetch a user file from a remote server
1417: } elsif ($userinput =~ /^fetchuserfile/) {
1418: my ($cmd,$fname)=split(/:/,$userinput);
1419: my ($udom,$uname,$ufile)=split(/\//,$fname);
1420: my $udir=propath($udom,$uname).'/userfiles';
1421: unless (-e $udir) { mkdir($udir,0770); }
1422: if (-e $udir) {
1423: $ufile=~s/^[\.\~]+//;
1424: $ufile=~s/\///g;
1425: my $destname=$udir.'/'.$ufile;
1426: my $transname=$udir.'/'.$ufile.'.in.transit';
1427: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1428: my $response;
1429: {
1430: my $ua=new LWP::UserAgent;
1431: my $request=new HTTP::Request('GET',"$remoteurl");
1432: $response=$ua->request($request,$transname);
1433: }
1434: if ($response->is_error()) {
1435: unlink($transname);
1436: my $message=$response->status_line;
1437: &logthis("LWP GET: $message for $fname ($remoteurl)");
1438: print $client "failed\n";
1439: } else {
1440: if (!rename($transname,$destname)) {
1441: &logthis("Unable to move $transname to $destname");
1442: unlink($transname);
1443: print $client "failed\n";
1444: } else {
1445: print $client "ok\n";
1446: }
1447: }
1448: } else {
1449: print $client "not_home\n";
1450: }
1451: # ------------------------------------------ authenticate access to a user file
1452: } elsif ($userinput =~ /^tokenauthuserfile/) {
1453: my ($cmd,$fname,$session)=split(/:/,$userinput);
1454: chomp($session);
1455: my $reply='non_auth';
1456: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1457: $session.'.id')) {
1458: while (my $line=<ENVIN>) {
1459: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1460: }
1461: close(ENVIN);
1462: print $client $reply."\n";
1463: } else {
1464: print $client "invalid_token\n";
1465: }
1466: # ----------------------------------------------------------------- unsubscribe
1467: } elsif ($userinput =~ /^unsub/) {
1468: my ($cmd,$fname)=split(/:/,$userinput);
1469: if (-e $fname) {
1470: print $client &unsub($client,$fname,$clientip);
1471: } else {
1472: print $client "not_found\n";
1473: }
1474: # ------------------------------------------------------------------- subscribe
1475: } elsif ($userinput =~ /^sub/) {
1476: print $client &subscribe($userinput,$clientip);
1477: # ------------------------------------------------------------- current version
1478: } elsif ($userinput =~ /^currentversion/) {
1479: my ($cmd,$fname)=split(/:/,$userinput);
1480: print $client ¤tversion($fname)."\n";
1481: # ------------------------------------------------------------------------- log
1482: } elsif ($userinput =~ /^log/) {
1483: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1484: chomp($what);
1485: my $proname=propath($udom,$uname);
1486: my $now=time;
1487: {
1488: my $hfh;
1489: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1490: print $hfh "$now:$hostid{$clientip}:$what\n";
1491: print $client "ok\n";
1492: } else {
1493: print $client "error: ".($!+0)
1494: ." IO::File->new Failed "
1495: ."while attempting log\n";
1496: }
1497: }
1498: # ------------------------------------------------------------------------- put
1499: } elsif ($userinput =~ /^put/) {
1500: my ($cmd,$udom,$uname,$namespace,$what)
1501: =split(/:/,$userinput);
1502: $namespace=~s/\//\_/g;
1503: $namespace=~s/\W//g;
1504: if ($namespace ne 'roles') {
1505: chomp($what);
1506: my $proname=propath($udom,$uname);
1507: my $now=time;
1508: unless ($namespace=~/^nohist\_/) {
1509: my $hfh;
1510: if (
1511: $hfh=IO::File->new(">>$proname/$namespace.hist")
1512: ) { print $hfh "P:$now:$what\n"; }
1513: }
1514: my @pairs=split(/\&/,$what);
1515: my %hash;
1516: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1517: foreach my $pair (@pairs) {
1518: my ($key,$value)=split(/=/,$pair);
1519: $hash{$key}=$value;
1520: }
1521: if (untie(%hash)) {
1522: print $client "ok\n";
1523: } else {
1524: print $client "error: ".($!+0)
1525: ." untie(GDBM) failed ".
1526: "while attempting put\n";
1527: }
1528: } else {
1529: print $client "error: ".($!)
1530: ." tie(GDBM) Failed ".
1531: "while attempting put\n";
1532: }
1533: } else {
1534: print $client "refused\n";
1535: }
1536: # -------------------------------------------------------------------- rolesput
1537: } elsif ($userinput =~ /^rolesput/) {
1538: &Debug("rolesput");
1539: if ($wasenc==1) {
1540: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1541: =split(/:/,$userinput);
1542: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1543: "user = ".$exeuser." udom=".$udom.
1544: "what = ".$what);
1545: my $namespace='roles';
1546: chomp($what);
1547: my $proname=propath($udom,$uname);
1548: my $now=time;
1549: {
1550: my $hfh;
1551: if (
1552: $hfh=IO::File->new(">>$proname/$namespace.hist")
1553: ) {
1554: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1555: }
1556: }
1557: my @pairs=split(/\&/,$what);
1558: my %hash;
1559: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1560: foreach my $pair (@pairs) {
1561: my ($key,$value)=split(/=/,$pair);
1562: &ManagePermissions($key, $udom, $uname,
1563: &GetAuthType( $udom,
1564: $uname));
1565: $hash{$key}=$value;
1566: }
1567: if (untie(%hash)) {
1568: print $client "ok\n";
1569: } else {
1570: print $client "error: ".($!+0)
1571: ." untie(GDBM) Failed ".
1572: "while attempting rolesput\n";
1573: }
1574: } else {
1575: print $client "error: ".($!+0)
1576: ." tie(GDBM) Failed ".
1577: "while attempting rolesput\n";
1578: }
1579: } else {
1580: print $client "refused\n";
1581: }
1582: # -------------------------------------------------------------------- rolesdel
1583: } elsif ($userinput =~ /^rolesdel/) {
1584: &Debug("rolesdel");
1585: if ($wasenc==1) {
1586: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1587: =split(/:/,$userinput);
1588: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1589: "user = ".$exeuser." udom=".$udom.
1590: "what = ".$what);
1591: my $namespace='roles';
1592: chomp($what);
1593: my $proname=propath($udom,$uname);
1594: my $now=time;
1595: {
1596: my $hfh;
1597: if (
1598: $hfh=IO::File->new(">>$proname/$namespace.hist")
1599: ) {
1600: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1601: }
1602: }
1603: my @rolekeys=split(/\&/,$what);
1604: my %hash;
1605: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1606: foreach my $key (@rolekeys) {
1607: delete $hash{$key};
1608: }
1609: if (untie(%hash)) {
1610: print $client "ok\n";
1611: } else {
1612: print $client "error: ".($!+0)
1613: ." untie(GDBM) Failed ".
1614: "while attempting rolesdel\n";
1615: }
1616: } else {
1617: print $client "error: ".($!+0)
1618: ." tie(GDBM) Failed ".
1619: "while attempting rolesdel\n";
1620: }
1621: } else {
1622: print $client "refused\n";
1623: }
1624: # ------------------------------------------------------------------------- get
1625: } elsif ($userinput =~ /^get/) {
1626: my ($cmd,$udom,$uname,$namespace,$what)
1627: =split(/:/,$userinput);
1628: $namespace=~s/\//\_/g;
1629: $namespace=~s/\W//g;
1630: chomp($what);
1631: my @queries=split(/\&/,$what);
1632: my $proname=propath($udom,$uname);
1633: my $qresult='';
1634: my %hash;
1635: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1636: for (my $i=0;$i<=$#queries;$i++) {
1637: $qresult.="$hash{$queries[$i]}&";
1638: }
1639: if (untie(%hash)) {
1640: $qresult=~s/\&$//;
1641: print $client "$qresult\n";
1642: } else {
1643: print $client "error: ".($!+0)
1644: ." untie(GDBM) Failed ".
1645: "while attempting get\n";
1646: }
1647: } else {
1648: if ($!+0 == 2) {
1649: print $client "error:No such file or ".
1650: "GDBM reported bad block error\n";
1651: } else {
1652: print $client "error: ".($!+0)
1653: ." tie(GDBM) Failed ".
1654: "while attempting get\n";
1655: }
1656: }
1657: # ------------------------------------------------------------------------ eget
1658: } elsif ($userinput =~ /^eget/) {
1659: my ($cmd,$udom,$uname,$namespace,$what)
1660: =split(/:/,$userinput);
1661: $namespace=~s/\//\_/g;
1662: $namespace=~s/\W//g;
1663: chomp($what);
1664: my @queries=split(/\&/,$what);
1665: my $proname=propath($udom,$uname);
1666: my $qresult='';
1667: my %hash;
1668: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1669: for (my $i=0;$i<=$#queries;$i++) {
1670: $qresult.="$hash{$queries[$i]}&";
1671: }
1672: if (untie(%hash)) {
1673: $qresult=~s/\&$//;
1674: if ($cipher) {
1675: my $cmdlength=length($qresult);
1676: $qresult.=" ";
1677: my $encqresult='';
1678: for
1679: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1680: $encqresult.=
1681: unpack("H16",
1682: $cipher->encrypt(substr($qresult,$encidx,8)));
1683: }
1684: print $client "enc:$cmdlength:$encqresult\n";
1685: } else {
1686: print $client "error:no_key\n";
1687: }
1688: } else {
1689: print $client "error: ".($!+0)
1690: ." untie(GDBM) Failed ".
1691: "while attempting eget\n";
1692: }
1693: } else {
1694: print $client "error: ".($!+0)
1695: ." tie(GDBM) Failed ".
1696: "while attempting eget\n";
1697: }
1698: # ------------------------------------------------------------------------- del
1699: } elsif ($userinput =~ /^del/) {
1700: my ($cmd,$udom,$uname,$namespace,$what)
1701: =split(/:/,$userinput);
1702: $namespace=~s/\//\_/g;
1703: $namespace=~s/\W//g;
1704: chomp($what);
1705: my $proname=propath($udom,$uname);
1706: my $now=time;
1707: unless ($namespace=~/^nohist\_/) {
1708: my $hfh;
1709: if (
1710: $hfh=IO::File->new(">>$proname/$namespace.hist")
1711: ) { print $hfh "D:$now:$what\n"; }
1712: }
1713: my @keys=split(/\&/,$what);
1714: my %hash;
1715: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1716: foreach my $key (@keys) {
1717: delete($hash{$key});
1718: }
1719: if (untie(%hash)) {
1720: print $client "ok\n";
1721: } else {
1722: print $client "error: ".($!+0)
1723: ." untie(GDBM) Failed ".
1724: "while attempting del\n";
1725: }
1726: } else {
1727: print $client "error: ".($!+0)
1728: ." tie(GDBM) Failed ".
1729: "while attempting del\n";
1730: }
1731: # ------------------------------------------------------------------------ keys
1732: } elsif ($userinput =~ /^keys/) {
1733: my ($cmd,$udom,$uname,$namespace)
1734: =split(/:/,$userinput);
1735: $namespace=~s/\//\_/g;
1736: $namespace=~s/\W//g;
1737: my $proname=propath($udom,$uname);
1738: my $qresult='';
1739: my %hash;
1740: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1741: foreach my $key (keys %hash) {
1742: $qresult.="$key&";
1743: }
1744: if (untie(%hash)) {
1745: $qresult=~s/\&$//;
1746: print $client "$qresult\n";
1747: } else {
1748: print $client "error: ".($!+0)
1749: ." untie(GDBM) Failed ".
1750: "while attempting keys\n";
1751: }
1752: } else {
1753: print $client "error: ".($!+0)
1754: ." tie(GDBM) Failed ".
1755: "while attempting keys\n";
1756: }
1757: # ----------------------------------------------------------------- dumpcurrent
1758: } elsif ($userinput =~ /^currentdump/) {
1759: my ($cmd,$udom,$uname,$namespace)
1760: =split(/:/,$userinput);
1761: $namespace=~s/\//\_/g;
1762: $namespace=~s/\W//g;
1763: my $qresult='';
1764: my $proname=propath($udom,$uname);
1765: my %hash;
1766: if (tie(%hash,'GDBM_File',
1767: "$proname/$namespace.db",
1768: &GDBM_READER(),0640)) {
1769: # Structure of %data:
1770: # $data{$symb}->{$parameter}=$value;
1771: # $data{$symb}->{'v.'.$parameter}=$version;
1772: # since $parameter will be unescaped, we do not
1773: # have to worry about silly parameter names...
1774: my %data = ();
1775: while (my ($key,$value) = each(%hash)) {
1776: my ($v,$symb,$param) = split(/:/,$key);
1777: next if ($v eq 'version' || $symb eq 'keys');
1778: next if (exists($data{$symb}) &&
1779: exists($data{$symb}->{$param}) &&
1780: $data{$symb}->{'v.'.$param} > $v);
1781: $data{$symb}->{$param}=$value;
1782: $data{$symb}->{'v.'.$param}=$v;
1783: }
1784: if (untie(%hash)) {
1785: while (my ($symb,$param_hash) = each(%data)) {
1786: while(my ($param,$value) = each (%$param_hash)){
1787: next if ($param =~ /^v\./);
1788: $qresult.=$symb.':'.$param.'='.$value.'&';
1789: }
1790: }
1791: chop($qresult);
1792: print $client "$qresult\n";
1793: } else {
1794: print $client "error: ".($!+0)
1795: ." untie(GDBM) Failed ".
1796: "while attempting currentdump\n";
1797: }
1798: } else {
1799: print $client "error: ".($!+0)
1800: ." tie(GDBM) Failed ".
1801: "while attempting currentdump\n";
1802: }
1803: # ------------------------------------------------------------------------ dump
1804: } elsif ($userinput =~ /^dump/) {
1805: my ($cmd,$udom,$uname,$namespace,$regexp)
1806: =split(/:/,$userinput);
1807: $namespace=~s/\//\_/g;
1808: $namespace=~s/\W//g;
1809: if (defined($regexp)) {
1810: $regexp=&unescape($regexp);
1811: } else {
1812: $regexp='.';
1813: }
1814: my $qresult='';
1815: my $proname=propath($udom,$uname);
1816: my %hash;
1817: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1818: study($regexp);
1819: while (my ($key,$value) = each(%hash)) {
1820: if ($regexp eq '.') {
1821: $qresult.=$key.'='.$value.'&';
1822: } else {
1823: my $unescapeKey = &unescape($key);
1824: if (eval('$unescapeKey=~/$regexp/')) {
1825: $qresult.="$key=$value&";
1826: }
1827: }
1828: }
1829: if (untie(%hash)) {
1830: chop($qresult);
1831: print $client "$qresult\n";
1832: } else {
1833: print $client "error: ".($!+0)
1834: ." untie(GDBM) Failed ".
1835: "while attempting dump\n";
1836: }
1837: } else {
1838: print $client "error: ".($!+0)
1839: ." tie(GDBM) Failed ".
1840: "while attempting dump\n";
1841: }
1842: # ----------------------------------------------------------------------- store
1843: } elsif ($userinput =~ /^store/) {
1844: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1845: =split(/:/,$userinput);
1846: $namespace=~s/\//\_/g;
1847: $namespace=~s/\W//g;
1848: if ($namespace ne 'roles') {
1849: chomp($what);
1850: my $proname=propath($udom,$uname);
1851: my $now=time;
1852: unless ($namespace=~/^nohist\_/) {
1853: my $hfh;
1854: if (
1855: $hfh=IO::File->new(">>$proname/$namespace.hist")
1856: ) { print $hfh "P:$now:$rid:$what\n"; }
1857: }
1858: my @pairs=split(/\&/,$what);
1859: my %hash;
1860: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1861: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1862: my $key;
1863: $hash{"version:$rid"}++;
1864: my $version=$hash{"version:$rid"};
1865: my $allkeys='';
1866: foreach my $pair (@pairs) {
1867: my ($key,$value)=split(/=/,$pair);
1868: $allkeys.=$key.':';
1869: $hash{"$version:$rid:$key"}=$value;
1870: }
1871: $hash{"$version:$rid:timestamp"}=$now;
1872: $allkeys.='timestamp';
1873: $hash{"$version:keys:$rid"}=$allkeys;
1874: if (untie(%hash)) {
1875: print $client "ok\n";
1876: } else {
1877: print $client "error: ".($!+0)
1878: ." untie(GDBM) Failed ".
1879: "while attempting store\n";
1880: }
1881: } else {
1882: print $client "error: ".($!+0)
1883: ." tie(GDBM) Failed ".
1884: "while attempting store\n";
1885: }
1886: } else {
1887: print $client "refused\n";
1888: }
1889: # --------------------------------------------------------------------- restore
1890: } elsif ($userinput =~ /^restore/) {
1891: my ($cmd,$udom,$uname,$namespace,$rid)
1892: =split(/:/,$userinput);
1893: $namespace=~s/\//\_/g;
1894: $namespace=~s/\W//g;
1895: chomp($rid);
1896: my $proname=propath($udom,$uname);
1897: my $qresult='';
1898: my %hash;
1899: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1900: my $version=$hash{"version:$rid"};
1901: $qresult.="version=$version&";
1902: my $scope;
1903: for ($scope=1;$scope<=$version;$scope++) {
1904: my $vkeys=$hash{"$scope:keys:$rid"};
1905: my @keys=split(/:/,$vkeys);
1906: my $key;
1907: $qresult.="$scope:keys=$vkeys&";
1908: foreach $key (@keys) {
1909: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1910: }
1911: }
1912: if (untie(%hash)) {
1913: $qresult=~s/\&$//;
1914: print $client "$qresult\n";
1915: } else {
1916: print $client "error: ".($!+0)
1917: ." untie(GDBM) Failed ".
1918: "while attempting restore\n";
1919: }
1920: } else {
1921: print $client "error: ".($!+0)
1922: ." tie(GDBM) Failed ".
1923: "while attempting restore\n";
1924: }
1925: # -------------------------------------------------------------------- chatsend
1926: } elsif ($userinput =~ /^chatsend/) {
1927: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1928: &chatadd($cdom,$cnum,$newpost);
1929: print $client "ok\n";
1930: # -------------------------------------------------------------------- chatretr
1931: } elsif ($userinput =~ /^chatretr/) {
1932: my
1933: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
1934: my $reply='';
1935: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
1936: $reply.=&escape($_).':';
1937: }
1938: $reply=~s/\:$//;
1939: print $client $reply."\n";
1940: # ------------------------------------------------------------------- querysend
1941: } elsif ($userinput =~ /^querysend/) {
1942: my ($cmd,$query,
1943: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1944: $query=~s/\n*$//g;
1945: print $client "".
1946: sqlreply("$hostid{$clientip}\&$query".
1947: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1948: # ------------------------------------------------------------------ queryreply
1949: } elsif ($userinput =~ /^queryreply/) {
1950: my ($cmd,$id,$reply)=split(/:/,$userinput);
1951: my $store;
1952: my $execdir=$perlvar{'lonDaemons'};
1953: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1954: $reply=~s/\&/\n/g;
1955: print $store $reply;
1956: close $store;
1957: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1958: print $store2 "done\n";
1959: close $store2;
1960: print $client "ok\n";
1961: }
1962: else {
1963: print $client "error: ".($!+0)
1964: ." IO::File->new Failed ".
1965: "while attempting queryreply\n";
1966: }
1967: # ----------------------------------------------------------------- courseidput
1968: } elsif ($userinput =~ /^courseidput/) {
1969: my ($cmd,$udom,$what)=split(/:/,$userinput);
1970: chomp($what);
1971: $udom=~s/\W//g;
1972: my $proname=
1973: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1974: my $now=time;
1975: my @pairs=split(/\&/,$what);
1976: my %hash;
1977: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1978: foreach my $pair (@pairs) {
1979: my ($key,$value)=split(/=/,$pair);
1980: $hash{$key}=$value.':'.$now;
1981: }
1982: if (untie(%hash)) {
1983: print $client "ok\n";
1984: } else {
1985: print $client "error: ".($!+0)
1986: ." untie(GDBM) Failed ".
1987: "while attempting courseidput\n";
1988: }
1989: } else {
1990: print $client "error: ".($!+0)
1991: ." tie(GDBM) Failed ".
1992: "while attempting courseidput\n";
1993: }
1994: # ---------------------------------------------------------------- courseiddump
1995: } elsif ($userinput =~ /^courseiddump/) {
1996: my ($cmd,$udom,$since,$description)
1997: =split(/:/,$userinput);
1998: if (defined($description)) {
1999: $description=&unescape($description);
2000: } else {
2001: $description='.';
2002: }
2003: unless (defined($since)) { $since=0; }
2004: my $qresult='';
2005: my $proname=
2006: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2007: my %hash;
2008: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2009: while (my ($key,$value) = each(%hash)) {
2010: my ($descr,$lasttime)=split(/\:/,$value);
2011: if ($lasttime<$since) { next; }
2012: if ($description eq '.') {
2013: $qresult.=$key.'='.$descr.'&';
2014: } else {
2015: my $unescapeVal = &unescape($descr);
2016: if (eval('$unescapeVal=~/$description/i')) {
2017: $qresult.="$key=$descr&";
2018: }
2019: }
2020: }
2021: if (untie(%hash)) {
2022: chop($qresult);
2023: print $client "$qresult\n";
2024: } else {
2025: print $client "error: ".($!+0)
2026: ." untie(GDBM) Failed ".
2027: "while attempting courseiddump\n";
2028: }
2029: } else {
2030: print $client "error: ".($!+0)
2031: ." tie(GDBM) Failed ".
2032: "while attempting courseiddump\n";
2033: }
2034: # ----------------------------------------------------------------------- idput
2035: } elsif ($userinput =~ /^idput/) {
2036: my ($cmd,$udom,$what)=split(/:/,$userinput);
2037: chomp($what);
2038: $udom=~s/\W//g;
2039: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2040: my $now=time;
2041: {
2042: my $hfh;
2043: if (
2044: $hfh=IO::File->new(">>$proname.hist")
2045: ) { print $hfh "P:$now:$what\n"; }
2046: }
2047: my @pairs=split(/\&/,$what);
2048: my %hash;
2049: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2050: foreach my $pair (@pairs) {
2051: my ($key,$value)=split(/=/,$pair);
2052: $hash{$key}=$value;
2053: }
2054: if (untie(%hash)) {
2055: print $client "ok\n";
2056: } else {
2057: print $client "error: ".($!+0)
2058: ." untie(GDBM) Failed ".
2059: "while attempting idput\n";
2060: }
2061: } else {
2062: print $client "error: ".($!+0)
2063: ." tie(GDBM) Failed ".
2064: "while attempting idput\n";
2065: }
2066: # ----------------------------------------------------------------------- idget
2067: } elsif ($userinput =~ /^idget/) {
2068: my ($cmd,$udom,$what)=split(/:/,$userinput);
2069: chomp($what);
2070: $udom=~s/\W//g;
2071: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2072: my @queries=split(/\&/,$what);
2073: my $qresult='';
2074: my %hash;
2075: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2076: for (my $i=0;$i<=$#queries;$i++) {
2077: $qresult.="$hash{$queries[$i]}&";
2078: }
2079: if (untie(%hash)) {
2080: $qresult=~s/\&$//;
2081: print $client "$qresult\n";
2082: } else {
2083: print $client "error: ".($!+0)
2084: ." untie(GDBM) Failed ".
2085: "while attempting idget\n";
2086: }
2087: } else {
2088: print $client "error: ".($!+0)
2089: ." tie(GDBM) Failed ".
2090: "while attempting idget\n";
2091: }
2092: # ---------------------------------------------------------------------- tmpput
2093: } elsif ($userinput =~ /^tmpput/) {
2094: my ($cmd,$what)=split(/:/,$userinput);
2095: my $store;
2096: $tmpsnum++;
2097: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2098: $id=~s/\W/\_/g;
2099: $what=~s/\n//g;
2100: my $execdir=$perlvar{'lonDaemons'};
2101: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2102: print $store $what;
2103: close $store;
2104: print $client "$id\n";
2105: }
2106: else {
2107: print $client "error: ".($!+0)
2108: ."IO::File->new Failed ".
2109: "while attempting tmpput\n";
2110: }
2111:
2112: # ---------------------------------------------------------------------- tmpget
2113: } elsif ($userinput =~ /^tmpget/) {
2114: my ($cmd,$id)=split(/:/,$userinput);
2115: chomp($id);
2116: $id=~s/\W/\_/g;
2117: my $store;
2118: my $execdir=$perlvar{'lonDaemons'};
2119: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2120: my $reply=<$store>;
2121: print $client "$reply\n";
2122: close $store;
2123: }
2124: else {
2125: print $client "error: ".($!+0)
2126: ."IO::File->new Failed ".
2127: "while attempting tmpget\n";
2128: }
2129:
2130: # ---------------------------------------------------------------------- tmpdel
2131: } elsif ($userinput =~ /^tmpdel/) {
2132: my ($cmd,$id)=split(/:/,$userinput);
2133: chomp($id);
2134: $id=~s/\W/\_/g;
2135: my $execdir=$perlvar{'lonDaemons'};
2136: if (unlink("$execdir/tmp/$id.tmp")) {
2137: print $client "ok\n";
2138: } else {
2139: print $client "error: ".($!+0)
2140: ."Unlink tmp Failed ".
2141: "while attempting tmpdel\n";
2142: }
2143: # -------------------------------------------------------------------------- ls
2144: } elsif ($userinput =~ /^ls/) {
2145: my ($cmd,$ulsdir)=split(/:/,$userinput);
2146: my $ulsout='';
2147: my $ulsfn;
2148: if (-e $ulsdir) {
2149: if(-d $ulsdir) {
2150: if (opendir(LSDIR,$ulsdir)) {
2151: while ($ulsfn=readdir(LSDIR)) {
2152: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2153: $ulsout.=$ulsfn.'&'.
2154: join('&',@ulsstats).':';
2155: }
2156: closedir(LSDIR);
2157: }
2158: } else {
2159: my @ulsstats=stat($ulsdir);
2160: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2161: }
2162: } else {
2163: $ulsout='no_such_dir';
2164: }
2165: if ($ulsout eq '') { $ulsout='empty'; }
2166: print $client "$ulsout\n";
2167: # ----------------------------------------------------------------- setannounce
2168: } elsif ($userinput =~ /^setannounce/) {
2169: my ($cmd,$announcement)=split(/:/,$userinput);
2170: chomp($announcement);
2171: $announcement=&unescape($announcement);
2172: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2173: '/announcement.txt')) {
2174: print $store $announcement;
2175: close $store;
2176: print $client "ok\n";
2177: } else {
2178: print $client "error: ".($!+0)."\n";
2179: }
2180: # ------------------------------------------------------------------ Hanging up
2181: } elsif (($userinput =~ /^exit/) ||
2182: ($userinput =~ /^init/)) {
2183: &logthis(
2184: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
2185: print $client "bye\n";
2186: $client->close();
2187: last;
2188: # ------------------------------------------------------------- unknown command
2189: } elsif ($userinput =~ /^sethost:/) {
2190: print $client &sethost($userinput)."\n";
2191: } elsif ($userinput =~/^version:/) {
2192: print $client &version($userinput)."\n";
2193: } else {
2194: # unknown command
2195: print $client "unknown_cmd\n";
2196: }
2197: # -------------------------------------------------------------------- complete
2198: alarm(0);
2199: &status('Listening to '.$hostid{$clientip});
2200: }
2201: # --------------------------------------------- client unknown or fishy, refuse
2202: } else {
2203: print $client "refused\n";
2204: $client->close();
2205: &logthis("<font color=blue>WARNING: "
2206: ."Rejected client $clientip, closing connection</font>");
2207: }
2208: }
2209:
2210: # =============================================================================
2211:
2212: &logthis("<font color=red>CRITICAL: "
2213: ."Disconnect from $clientip ($hostid{$clientip})</font>");
2214:
2215:
2216: # this exit is VERY important, otherwise the child will become
2217: # a producer of more and more children, forking yourself into
2218: # process death.
2219: exit;
2220:
2221: }
2222:
2223:
2224: #
2225: # Checks to see if the input roleput request was to set
2226: # an author role. If so, invokes the lchtmldir script to set
2227: # up a correct public_html
2228: # Parameters:
2229: # request - The request sent to the rolesput subchunk.
2230: # We're looking for /domain/_au
2231: # domain - The domain in which the user is having roles doctored.
2232: # user - Name of the user for which the role is being put.
2233: # authtype - The authentication type associated with the user.
2234: #
2235: sub ManagePermissions
2236: {
2237: my $request = shift;
2238: my $domain = shift;
2239: my $user = shift;
2240: my $authtype= shift;
2241:
2242: # See if the request is of the form /$domain/_au
2243: &logthis("ruequest is $request");
2244: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
2245: my $execdir = $perlvar{'lonDaemons'};
2246: my $userhome= "/home/$user" ;
2247: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
2248: system("$execdir/lchtmldir $userhome $user $authtype");
2249: }
2250: }
2251: #
2252: # GetAuthType - Determines the authorization type of a user in a domain.
2253:
2254: # Returns the authorization type or nouser if there is no such user.
2255: #
2256: sub GetAuthType
2257: {
2258: my $domain = shift;
2259: my $user = shift;
2260:
2261: Debug("GetAuthType( $domain, $user ) \n");
2262: my $proname = &propath($domain, $user);
2263: my $passwdfile = "$proname/passwd";
2264: if( -e $passwdfile ) {
2265: my $pf = IO::File->new($passwdfile);
2266: my $realpassword = <$pf>;
2267: chomp($realpassword);
2268: Debug("Password info = $realpassword\n");
2269: my ($authtype, $contentpwd) = split(/:/, $realpassword);
2270: Debug("Authtype = $authtype, content = $contentpwd\n");
2271: my $availinfo = '';
2272: if($authtype eq 'krb4' or $authtype eq 'krb5') {
2273: $availinfo = $contentpwd;
2274: }
2275:
2276: return "$authtype:$availinfo";
2277: }
2278: else {
2279: Debug("Returning nouser");
2280: return "nouser";
2281: }
2282: }
2283:
2284: sub addline {
2285: my ($fname,$hostid,$ip,$newline)=@_;
2286: my $contents;
2287: my $found=0;
2288: my $expr='^'.$hostid.':'.$ip.':';
2289: $expr =~ s/\./\\\./g;
2290: my $sh;
2291: if ($sh=IO::File->new("$fname.subscription")) {
2292: while (my $subline=<$sh>) {
2293: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
2294: }
2295: $sh->close();
2296: }
2297: $sh=IO::File->new(">$fname.subscription");
2298: if ($contents) { print $sh $contents; }
2299: if ($newline) { print $sh $newline; }
2300: $sh->close();
2301: return $found;
2302: }
2303:
2304: sub getchat {
2305: my ($cdom,$cname,$udom,$uname)=@_;
2306: my %hash;
2307: my $proname=&propath($cdom,$cname);
2308: my @entries=();
2309: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2310: &GDBM_READER(),0640)) {
2311: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2312: untie %hash;
2313: }
2314: my @participants=();
2315: my $cutoff=time-60;
2316: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
2317: &GDBM_WRCREAT(),0640)) {
2318: $hash{$uname.':'.$udom}=time;
2319: foreach (sort keys %hash) {
2320: if ($hash{$_}>$cutoff) {
2321: $participants[$#participants+1]='active_participant:'.$_;
2322: }
2323: }
2324: untie %hash;
2325: }
2326: return (@participants,@entries);
2327: }
2328:
2329: sub chatadd {
2330: my ($cdom,$cname,$newchat)=@_;
2331: my %hash;
2332: my $proname=&propath($cdom,$cname);
2333: my @entries=();
2334: my $time=time;
2335: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2336: &GDBM_WRCREAT(),0640)) {
2337: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2338: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
2339: my ($thentime,$idnum)=split(/\_/,$lastid);
2340: my $newid=$time.'_000000';
2341: if ($thentime==$time) {
2342: $idnum=~s/^0+//;
2343: $idnum++;
2344: $idnum=substr('000000'.$idnum,-6,6);
2345: $newid=$time.'_'.$idnum;
2346: }
2347: $hash{$newid}=$newchat;
2348: my $expired=$time-3600;
2349: foreach (keys %hash) {
2350: my ($thistime)=($_=~/(\d+)\_/);
2351: if ($thistime<$expired) {
2352: delete $hash{$_};
2353: }
2354: }
2355: untie %hash;
2356: }
2357: {
2358: my $hfh;
2359: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
2360: print $hfh "$time:".&unescape($newchat)."\n";
2361: }
2362: }
2363: }
2364:
2365: sub unsub {
2366: my ($fname,$clientip)=@_;
2367: my $result;
2368: if (unlink("$fname.$hostid{$clientip}")) {
2369: $result="ok\n";
2370: } else {
2371: $result="not_subscribed\n";
2372: }
2373: if (-e "$fname.subscription") {
2374: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
2375: if ($found) { $result="ok\n"; }
2376: } else {
2377: if ($result != "ok\n") { $result="not_subscribed\n"; }
2378: }
2379: return $result;
2380: }
2381:
2382: sub currentversion {
2383: my $fname=shift;
2384: my $version=-1;
2385: my $ulsdir='';
2386: if ($fname=~/^(.+)\/[^\/]+$/) {
2387: $ulsdir=$1;
2388: }
2389: my ($fnamere1,$fnamere2);
2390: # remove version if already specified
2391: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
2392: # get the bits that go before and after the version number
2393: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
2394: $fnamere1=$1;
2395: $fnamere2='.'.$2;
2396: }
2397: if (-e $fname) { $version=1; }
2398: if (-e $ulsdir) {
2399: if(-d $ulsdir) {
2400: if (opendir(LSDIR,$ulsdir)) {
2401: my $ulsfn;
2402: while ($ulsfn=readdir(LSDIR)) {
2403: # see if this is a regular file (ignore links produced earlier)
2404: my $thisfile=$ulsdir.'/'.$ulsfn;
2405: unless (-l $thisfile) {
2406: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
2407: if ($1>$version) { $version=$1; }
2408: }
2409: }
2410: }
2411: closedir(LSDIR);
2412: $version++;
2413: }
2414: }
2415: }
2416: return $version;
2417: }
2418:
2419: sub thisversion {
2420: my $fname=shift;
2421: my $version=-1;
2422: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
2423: $version=$1;
2424: }
2425: return $version;
2426: }
2427:
2428: sub subscribe {
2429: my ($userinput,$clientip)=@_;
2430: my $result;
2431: my ($cmd,$fname)=split(/:/,$userinput);
2432: my $ownership=&ishome($fname);
2433: if ($ownership eq 'owner') {
2434: # explitly asking for the current version?
2435: unless (-e $fname) {
2436: my $currentversion=¤tversion($fname);
2437: if (&thisversion($fname)==$currentversion) {
2438: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
2439: my $root=$1;
2440: my $extension=$2;
2441: symlink($root.'.'.$extension,
2442: $root.'.'.$currentversion.'.'.$extension);
2443: unless ($extension=~/\.meta$/) {
2444: symlink($root.'.'.$extension.'.meta',
2445: $root.'.'.$currentversion.'.'.$extension.'.meta');
2446: }
2447: }
2448: }
2449: }
2450: if (-e $fname) {
2451: if (-d $fname) {
2452: $result="directory\n";
2453: } else {
2454: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
2455: my $now=time;
2456: my $found=&addline($fname,$hostid{$clientip},$clientip,
2457: "$hostid{$clientip}:$clientip:$now\n");
2458: if ($found) { $result="$fname\n"; }
2459: # if they were subscribed to only meta data, delete that
2460: # subscription, when you subscribe to a file you also get
2461: # the metadata
2462: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
2463: $fname=~s/\/home\/httpd\/html\/res/raw/;
2464: $fname="http://$thisserver/".$fname;
2465: $result="$fname\n";
2466: }
2467: } else {
2468: $result="not_found\n";
2469: }
2470: } else {
2471: $result="rejected\n";
2472: }
2473: return $result;
2474: }
2475:
2476: sub make_passwd_file {
2477: my ($uname, $umode,$npass,$passfilename)=@_;
2478: my $result="ok\n";
2479: if ($umode eq 'krb4' or $umode eq 'krb5') {
2480: {
2481: my $pf = IO::File->new(">$passfilename");
2482: print $pf "$umode:$npass\n";
2483: }
2484: } elsif ($umode eq 'internal') {
2485: my $salt=time;
2486: $salt=substr($salt,6,2);
2487: my $ncpass=crypt($npass,$salt);
2488: {
2489: &Debug("Creating internal auth");
2490: my $pf = IO::File->new(">$passfilename");
2491: print $pf "internal:$ncpass\n";
2492: }
2493: } elsif ($umode eq 'localauth') {
2494: {
2495: my $pf = IO::File->new(">$passfilename");
2496: print $pf "localauth:$npass\n";
2497: }
2498: } elsif ($umode eq 'unix') {
2499: {
2500: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
2501: {
2502: &Debug("Executing external: ".$execpath);
2503: &Debug("user = ".$uname.", Password =". $npass);
2504: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
2505: print $se "$uname\n";
2506: print $se "$npass\n";
2507: print $se "$npass\n";
2508: }
2509: my $useraddok = $?;
2510: if($useraddok > 0) {
2511: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
2512: }
2513: my $pf = IO::File->new(">$passfilename");
2514: print $pf "unix:\n";
2515: }
2516: } elsif ($umode eq 'none') {
2517: {
2518: my $pf = IO::File->new(">$passfilename");
2519: print $pf "none:\n";
2520: }
2521: } else {
2522: $result="auth_mode_error\n";
2523: }
2524: return $result;
2525: }
2526:
2527: sub sethost {
2528: my ($remotereq) = @_;
2529: my (undef,$hostid)=split(/:/,$remotereq);
2530: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
2531: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
2532: $currenthostid=$hostid;
2533: $currentdomainid=$hostdom{$hostid};
2534: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
2535: } else {
2536: &logthis("Requested host id $hostid not an alias of ".
2537: $perlvar{'lonHostID'}." refusing connection");
2538: return 'unable_to_set';
2539: }
2540: return 'ok';
2541: }
2542:
2543: sub version {
2544: my ($userinput)=@_;
2545: $remoteVERSION=(split(/:/,$userinput))[1];
2546: return "version:$VERSION";
2547: }
2548:
2549: #There is a copy of this in lonnet.pm
2550: sub userload {
2551: my $numusers=0;
2552: {
2553: opendir(LONIDS,$perlvar{'lonIDsDir'});
2554: my $filename;
2555: my $curtime=time;
2556: while ($filename=readdir(LONIDS)) {
2557: if ($filename eq '.' || $filename eq '..') {next;}
2558: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
2559: if ($curtime-$mtime < 3600) { $numusers++; }
2560: }
2561: closedir(LONIDS);
2562: }
2563: my $userloadpercent=0;
2564: my $maxuserload=$perlvar{'lonUserLoadLim'};
2565: if ($maxuserload) {
2566: $userloadpercent=100*$numusers/$maxuserload;
2567: }
2568: $userloadpercent=sprintf("%.2f",$userloadpercent);
2569: return $userloadpercent;
2570: }
2571:
2572: # ----------------------------------- POD (plain old documentation, CPAN style)
2573:
2574: =head1 NAME
2575:
2576: lond - "LON Daemon" Server (port "LOND" 5663)
2577:
2578: =head1 SYNOPSIS
2579:
2580: Usage: B<lond>
2581:
2582: Should only be run as user=www. This is a command-line script which
2583: is invoked by B<loncron>. There is no expectation that a typical user
2584: will manually start B<lond> from the command-line. (In other words,
2585: DO NOT START B<lond> YOURSELF.)
2586:
2587: =head1 DESCRIPTION
2588:
2589: There are two characteristics associated with the running of B<lond>,
2590: PROCESS MANAGEMENT (starting, stopping, handling child processes)
2591: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
2592: subscriptions, etc). These are described in two large
2593: sections below.
2594:
2595: B<PROCESS MANAGEMENT>
2596:
2597: Preforker - server who forks first. Runs as a daemon. HUPs.
2598: Uses IDEA encryption
2599:
2600: B<lond> forks off children processes that correspond to the other servers
2601: in the network. Management of these processes can be done at the
2602: parent process level or the child process level.
2603:
2604: B<logs/lond.log> is the location of log messages.
2605:
2606: The process management is now explained in terms of linux shell commands,
2607: subroutines internal to this code, and signal assignments:
2608:
2609: =over 4
2610:
2611: =item *
2612:
2613: PID is stored in B<logs/lond.pid>
2614:
2615: This is the process id number of the parent B<lond> process.
2616:
2617: =item *
2618:
2619: SIGTERM and SIGINT
2620:
2621: Parent signal assignment:
2622: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
2623:
2624: Child signal assignment:
2625: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
2626: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
2627: to restart a new child.)
2628:
2629: Command-line invocations:
2630: B<kill> B<-s> SIGTERM I<PID>
2631: B<kill> B<-s> SIGINT I<PID>
2632:
2633: Subroutine B<HUNTSMAN>:
2634: This is only invoked for the B<lond> parent I<PID>.
2635: This kills all the children, and then the parent.
2636: The B<lonc.pid> file is cleared.
2637:
2638: =item *
2639:
2640: SIGHUP
2641:
2642: Current bug:
2643: This signal can only be processed the first time
2644: on the parent process. Subsequent SIGHUP signals
2645: have no effect.
2646:
2647: Parent signal assignment:
2648: $SIG{HUP} = \&HUPSMAN;
2649:
2650: Child signal assignment:
2651: none (nothing happens)
2652:
2653: Command-line invocations:
2654: B<kill> B<-s> SIGHUP I<PID>
2655:
2656: Subroutine B<HUPSMAN>:
2657: This is only invoked for the B<lond> parent I<PID>,
2658: This kills all the children, and then the parent.
2659: The B<lond.pid> file is cleared.
2660:
2661: =item *
2662:
2663: SIGUSR1
2664:
2665: Parent signal assignment:
2666: $SIG{USR1} = \&USRMAN;
2667:
2668: Child signal assignment:
2669: $SIG{USR1}= \&logstatus;
2670:
2671: Command-line invocations:
2672: B<kill> B<-s> SIGUSR1 I<PID>
2673:
2674: Subroutine B<USRMAN>:
2675: When invoked for the B<lond> parent I<PID>,
2676: SIGUSR1 is sent to all the children, and the status of
2677: each connection is logged.
2678:
2679: =item *
2680:
2681: SIGUSR2
2682:
2683: Parent Signal assignment:
2684: $SIG{USR2} = \&UpdateHosts
2685:
2686: Child signal assignment:
2687: NONE
2688:
2689:
2690: =item *
2691:
2692: SIGCHLD
2693:
2694: Parent signal assignment:
2695: $SIG{CHLD} = \&REAPER;
2696:
2697: Child signal assignment:
2698: none
2699:
2700: Command-line invocations:
2701: B<kill> B<-s> SIGCHLD I<PID>
2702:
2703: Subroutine B<REAPER>:
2704: This is only invoked for the B<lond> parent I<PID>.
2705: Information pertaining to the child is removed.
2706: The socket port is cleaned up.
2707:
2708: =back
2709:
2710: B<SERVER-SIDE ACTIVITIES>
2711:
2712: Server-side information can be accepted in an encrypted or non-encrypted
2713: method.
2714:
2715: =over 4
2716:
2717: =item ping
2718:
2719: Query a client in the hosts.tab table; "Are you there?"
2720:
2721: =item pong
2722:
2723: Respond to a ping query.
2724:
2725: =item ekey
2726:
2727: Read in encrypted key, make cipher. Respond with a buildkey.
2728:
2729: =item load
2730:
2731: Respond with CPU load based on a computation upon /proc/loadavg.
2732:
2733: =item currentauth
2734:
2735: Reply with current authentication information (only over an
2736: encrypted channel).
2737:
2738: =item auth
2739:
2740: Only over an encrypted channel, reply as to whether a user's
2741: authentication information can be validated.
2742:
2743: =item passwd
2744:
2745: Allow for a password to be set.
2746:
2747: =item makeuser
2748:
2749: Make a user.
2750:
2751: =item passwd
2752:
2753: Allow for authentication mechanism and password to be changed.
2754:
2755: =item home
2756:
2757: Respond to a question "are you the home for a given user?"
2758:
2759: =item update
2760:
2761: Update contents of a subscribed resource.
2762:
2763: =item unsubscribe
2764:
2765: The server is unsubscribing from a resource.
2766:
2767: =item subscribe
2768:
2769: The server is subscribing to a resource.
2770:
2771: =item log
2772:
2773: Place in B<logs/lond.log>
2774:
2775: =item put
2776:
2777: stores hash in namespace
2778:
2779: =item rolesput
2780:
2781: put a role into a user's environment
2782:
2783: =item get
2784:
2785: returns hash with keys from array
2786: reference filled in from namespace
2787:
2788: =item eget
2789:
2790: returns hash with keys from array
2791: reference filled in from namesp (encrypts the return communication)
2792:
2793: =item rolesget
2794:
2795: get a role from a user's environment
2796:
2797: =item del
2798:
2799: deletes keys out of array from namespace
2800:
2801: =item keys
2802:
2803: returns namespace keys
2804:
2805: =item dump
2806:
2807: dumps the complete (or key matching regexp) namespace into a hash
2808:
2809: =item store
2810:
2811: stores hash permanently
2812: for this url; hashref needs to be given and should be a \%hashname; the
2813: remaining args aren't required and if they aren't passed or are '' they will
2814: be derived from the ENV
2815:
2816: =item restore
2817:
2818: returns a hash for a given url
2819:
2820: =item querysend
2821:
2822: Tells client about the lonsql process that has been launched in response
2823: to a sent query.
2824:
2825: =item queryreply
2826:
2827: Accept information from lonsql and make appropriate storage in temporary
2828: file space.
2829:
2830: =item idput
2831:
2832: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2833: for each student, defined perhaps by the institutional Registrar.)
2834:
2835: =item idget
2836:
2837: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2838: for each student, defined perhaps by the institutional Registrar.)
2839:
2840: =item tmpput
2841:
2842: Accept and store information in temporary space.
2843:
2844: =item tmpget
2845:
2846: Send along temporarily stored information.
2847:
2848: =item ls
2849:
2850: List part of a user's directory.
2851:
2852: =item pushtable
2853:
2854: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
2855: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
2856: must be restored manually in case of a problem with the new table file.
2857: pushtable requires that the request be encrypted and validated via
2858: ValidateManager. The form of the command is:
2859: enc:pushtable tablename <tablecontents> \n
2860: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
2861: cleartext newline.
2862:
2863: =item Hanging up (exit or init)
2864:
2865: What to do when a client tells the server that they (the client)
2866: are leaving the network.
2867:
2868: =item unknown command
2869:
2870: If B<lond> is sent an unknown command (not in the list above),
2871: it replys to the client "unknown_cmd".
2872:
2873:
2874: =item UNKNOWN CLIENT
2875:
2876: If the anti-spoofing algorithm cannot verify the client,
2877: the client is rejected (with a "refused" message sent
2878: to the client, and the connection is closed.
2879:
2880: =back
2881:
2882: =head1 PREREQUISITES
2883:
2884: IO::Socket
2885: IO::File
2886: Apache::File
2887: Symbol
2888: POSIX
2889: Crypt::IDEA
2890: LWP::UserAgent()
2891: GDBM_File
2892: Authen::Krb4
2893: Authen::Krb5
2894:
2895: =head1 COREQUISITES
2896:
2897: =head1 OSNAMES
2898:
2899: linux
2900:
2901: =head1 SCRIPT CATEGORIES
2902:
2903: Server/Process
2904:
2905: =cut
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