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