1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.174 2004/02/06 05:25:16 taceyjo1 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:
28:
29: # http://www.lon-capa.org/
30: #
31:
32: use strict;
33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
36: use IO::Socket;
37: use IO::File;
38: #use Apache::File;
39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
43: use GDBM_File;
44: use Authen::Krb4;
45: use Authen::Krb5;
46: use lib '/home/httpd/lib/perl/';
47: use localauth;
48: use File::Copy;
49: use LONCAPA::ConfigFileEdit;
50:
51: my $DEBUG = 0; # Non zero to enable debug log entries.
52:
53: my $status='';
54: my $lastlog='';
55:
56: my $VERSION='$Revision: 1.174 $'; #' stupid emacs
57: my $remoteVERSION;
58: my $currenthostid;
59: my $currentdomainid;
60:
61: my $client;
62: my $clientip;
63: my $clientname;
64:
65: my $server;
66: my $thisserver;
67:
68: #
69: # Connection type is:
70: # client - All client actions are allowed
71: # manager - only management functions allowed.
72: # both - Both management and client actions are allowed
73: #
74:
75: my $ConnectionType;
76:
77: my %hostid;
78: my %hostdom;
79: my %hostip;
80:
81: my %managers; # Ip -> manager names
82:
83: my %perlvar; # Will have the apache conf defined perl vars.
84:
85: #
86: # The array below are password error strings."
87: #
88: my $lastpwderror = 13; # Largest error number from lcpasswd.
89: my @passwderrors = ("ok",
90: "lcpasswd must be run as user 'www'",
91: "lcpasswd got incorrect number of arguments",
92: "lcpasswd did not get the right nubmer of input text lines",
93: "lcpasswd too many simultaneous pwd changes in progress",
94: "lcpasswd User does not exist.",
95: "lcpasswd Incorrect current passwd",
96: "lcpasswd Unable to su to root.",
97: "lcpasswd Cannot set new passwd.",
98: "lcpasswd Username has invalid characters",
99: "lcpasswd Invalid characters in password",
100: "11", "12",
101: "lcpasswd Password mismatch");
102:
103:
104: # The array below are lcuseradd error strings.:
105:
106: my $lastadderror = 13;
107: my @adderrors = ("ok",
108: "User ID mismatch, lcuseradd must run as user www",
109: "lcuseradd Incorrect number of command line parameters must be 3",
110: "lcuseradd Incorrect number of stdinput lines, must be 3",
111: "lcuseradd Too many other simultaneous pwd changes in progress",
112: "lcuseradd User does not exist",
113: "lcuseradd Unable to make www member of users's group",
114: "lcuseradd Unable to su to root",
115: "lcuseradd Unable to set password",
116: "lcuseradd Usrname has invalid characters",
117: "lcuseradd Password has an invalid character",
118: "lcuseradd User already exists",
119: "lcuseradd Could not add user.",
120: "lcuseradd Password mismatch");
121:
122:
123: #
124: # GetCertificate: Given a transaction that requires a certificate,
125: # this function will extract the certificate from the transaction
126: # request. Note that at this point, the only concept of a certificate
127: # is the hostname to which we are connected.
128: #
129: # Parameter:
130: # request - The request sent by our client (this parameterization may
131: # need to change when we really use a certificate granting
132: # authority.
133: #
134: sub GetCertificate {
135: my $request = shift;
136:
137: return $clientip;
138: }
139:
140: #
141: # Return true if client is a manager.
142: #
143: sub isManager {
144: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
145: }
146: #
147: # Return tru if client can do client functions
148: #
149: sub isClient {
150: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
151: }
152:
153:
154: #
155: # ReadManagerTable: Reads in the current manager table. For now this is
156: # done on each manager authentication because:
157: # - These authentications are not frequent
158: # - This allows dynamic changes to the manager table
159: # without the need to signal to the lond.
160: #
161:
162: sub ReadManagerTable {
163:
164: # Clean out the old table first..
165:
166: foreach my $key (keys %managers) {
167: delete $managers{$key};
168: }
169:
170: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
171: if (!open (MANAGERS, $tablename)) {
172: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
173: return;
174: }
175: while(my $host = <MANAGERS>) {
176: chomp($host);
177: if ($host =~ "^#") { # Comment line.
178: logthis('<font color="green"> Skipping line: '. "$host</font>\n");
179: next;
180: }
181: if (!defined $hostip{$host}) { # This is a non cluster member
182: # The entry is of the form:
183: # cluname:hostname
184: # cluname - A 'cluster hostname' is needed in order to negotiate
185: # the host key.
186: # hostname- The dns name of the host.
187: #
188: my($cluname, $dnsname) = split(/:/, $host);
189:
190: my $ip = gethostbyname($dnsname);
191: if(defined($ip)) { # bad names don't deserve entry.
192: my $hostip = inet_ntoa($ip);
193: $managers{$hostip} = $cluname;
194: logthis('<font color="green"> registering manager '.
195: "$dnsname as $cluname with $hostip </font>\n");
196: }
197: } else {
198: logthis('<font color="green"> existing host'." $host</font>\n");
199: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
200: }
201: }
202: }
203:
204: #
205: # ValidManager: Determines if a given certificate represents a valid manager.
206: # in this primitive implementation, the 'certificate' is
207: # just the connecting loncapa client name. This is checked
208: # against a valid client list in the configuration.
209: #
210: #
211: sub ValidManager {
212: my $certificate = shift;
213:
214: return isManager;
215: }
216: #
217: # CopyFile: Called as part of the process of installing a
218: # new configuration file. This function copies an existing
219: # file to a backup file.
220: # Parameters:
221: # oldfile - Name of the file to backup.
222: # newfile - Name of the backup file.
223: # Return:
224: # 0 - Failure (errno has failure reason).
225: # 1 - Success.
226: #
227: sub CopyFile {
228: my $oldfile = shift;
229: my $newfile = shift;
230:
231: # The file must exist:
232:
233: if(-e $oldfile) {
234:
235: # Read the old file.
236:
237: my $oldfh = IO::File->new("< $oldfile");
238: if(!$oldfh) {
239: return 0;
240: }
241: my @contents = <$oldfh>; # Suck in the entire file.
242:
243: # write the backup file:
244:
245: my $newfh = IO::File->new("> $newfile");
246: if(!(defined $newfh)){
247: return 0;
248: }
249: my $lines = scalar @contents;
250: for (my $i =0; $i < $lines; $i++) {
251: print $newfh ($contents[$i]);
252: }
253:
254: $oldfh->close;
255: $newfh->close;
256:
257: chmod(0660, $newfile);
258:
259: return 1;
260:
261: } else {
262: return 0;
263: }
264: }
265: #
266: # Host files are passed out with externally visible host IPs.
267: # If, for example, we are behind a fire-wall or NAT host, our
268: # internally visible IP may be different than the externally
269: # visible IP. Therefore, we always adjust the contents of the
270: # host file so that the entry for ME is the IP that we believe
271: # we have. At present, this is defined as the entry that
272: # DNS has for us. If by some chance we are not able to get a
273: # DNS translation for us, then we assume that the host.tab file
274: # is correct.
275: # BUGBUGBUG - in the future, we really should see if we can
276: # easily query the interface(s) instead.
277: # Parameter(s):
278: # contents - The contents of the host.tab to check.
279: # Returns:
280: # newcontents - The adjusted contents.
281: #
282: #
283: sub AdjustHostContents {
284: my $contents = shift;
285: my $adjusted;
286: my $me = $perlvar{'lonHostID'};
287:
288: foreach my $line (split(/\n/,$contents)) {
289: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
290: chomp($line);
291: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
292: if ($id eq $me) {
293: my $ip = gethostbyname($name);
294: my $ipnew = inet_ntoa($ip);
295: $ip = $ipnew;
296: # Reconstruct the host line and append to adjusted:
297:
298: my $newline = "$id:$domain:$role:$name:$ip";
299: if($maxcon ne "") { # Not all hosts have loncnew tuning params
300: $newline .= ":$maxcon:$idleto:$mincon";
301: }
302: $adjusted .= $newline."\n";
303:
304: } else { # Not me, pass unmodified.
305: $adjusted .= $line."\n";
306: }
307: } else { # Blank or comment never re-written.
308: $adjusted .= $line."\n"; # Pass blanks and comments as is.
309: }
310: }
311: return $adjusted;
312: }
313: #
314: # InstallFile: Called to install an administrative file:
315: # - The file is created with <name>.tmp
316: # - The <name>.tmp file is then mv'd to <name>
317: # This lugubrious procedure is done to ensure that we are never without
318: # a valid, even if dated, version of the file regardless of who crashes
319: # and when the crash occurs.
320: #
321: # Parameters:
322: # Name of the file
323: # File Contents.
324: # Return:
325: # nonzero - success.
326: # 0 - failure and $! has an errno.
327: #
328: sub InstallFile {
329: my $Filename = shift;
330: my $Contents = shift;
331: my $TempFile = $Filename.".tmp";
332:
333: # Open the file for write:
334:
335: my $fh = IO::File->new("> $TempFile"); # Write to temp.
336: if(!(defined $fh)) {
337: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
338: return 0;
339: }
340: # write the contents of the file:
341:
342: print $fh ($Contents);
343: $fh->close; # In case we ever have a filesystem w. locking
344:
345: chmod(0660, $TempFile);
346:
347: # Now we can move install the file in position.
348:
349: move($TempFile, $Filename);
350:
351: return 1;
352: }
353: #
354: # ConfigFileFromSelector: converts a configuration file selector
355: # (one of host or domain at this point) into a
356: # configuration file pathname.
357: #
358: # Parameters:
359: # selector - Configuration file selector.
360: # Returns:
361: # Full path to the file or undef if the selector is invalid.
362: #
363: sub ConfigFileFromSelector {
364: my $selector = shift;
365: my $tablefile;
366:
367: my $tabledir = $perlvar{'lonTabDir'}.'/';
368: if ($selector eq "hosts") {
369: $tablefile = $tabledir."hosts.tab";
370: } elsif ($selector eq "domain") {
371: $tablefile = $tabledir."domain.tab";
372: } else {
373: return undef;
374: }
375: return $tablefile;
376:
377: }
378: #
379: # PushFile: Called to do an administrative push of a file.
380: # - Ensure the file being pushed is one we support.
381: # - Backup the old file to <filename.saved>
382: # - Separate the contents of the new file out from the
383: # rest of the request.
384: # - Write the new file.
385: # Parameter:
386: # Request - The entire user request. This consists of a : separated
387: # string pushfile:tablename:contents.
388: # NOTE: The contents may have :'s in it as well making things a bit
389: # more interesting... but not much.
390: # Returns:
391: # String to send to client ("ok" or "refused" if bad file).
392: #
393: sub PushFile {
394: my $request = shift;
395: my ($command, $filename, $contents) = split(":", $request, 3);
396:
397: # At this point in time, pushes for only the following tables are
398: # supported:
399: # hosts.tab ($filename eq host).
400: # domain.tab ($filename eq domain).
401: # Construct the destination filename or reject the request.
402: #
403: # lonManage is supposed to ensure this, however this session could be
404: # part of some elaborate spoof that managed somehow to authenticate.
405: #
406:
407:
408: my $tablefile = ConfigFileFromSelector($filename);
409: if(! (defined $tablefile)) {
410: return "refused";
411: }
412: #
413: # >copy< the old table to the backup table
414: # don't rename in case system crashes/reboots etc. in the time
415: # window between a rename and write.
416: #
417: my $backupfile = $tablefile;
418: $backupfile =~ s/\.tab$/.old/;
419: if(!CopyFile($tablefile, $backupfile)) {
420: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
421: return "error:$!";
422: }
423: &logthis('<font color="green"> Pushfile: backed up '
424: .$tablefile." to $backupfile</font>");
425:
426: # If the file being pushed is the host file, we adjust the entry for ourself so that the
427: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
428: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
429: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
430: # that possibilty.
431:
432: if($filename eq "host") {
433: $contents = AdjustHostContents($contents);
434: }
435:
436: # Install the new file:
437:
438: if(!InstallFile($tablefile, $contents)) {
439: &logthis('<font color="red"> Pushfile: unable to install '
440: .$tablefile." $! </font>");
441: return "error:$!";
442: }
443: else {
444: &logthis('<font color="green"> Installed new '.$tablefile
445: ."</font>");
446:
447: }
448:
449:
450: # Indicate success:
451:
452: return "ok";
453:
454: }
455:
456: #
457: # Called to re-init either lonc or lond.
458: #
459: # Parameters:
460: # request - The full request by the client. This is of the form
461: # reinit:<process>
462: # where <process> is allowed to be either of
463: # lonc or lond
464: #
465: # Returns:
466: # The string to be sent back to the client either:
467: # ok - Everything worked just fine.
468: # error:why - There was a failure and why describes the reason.
469: #
470: #
471: sub ReinitProcess {
472: my $request = shift;
473:
474:
475: # separate the request (reinit) from the process identifier and
476: # validate it producing the name of the .pid file for the process.
477: #
478: #
479: my ($junk, $process) = split(":", $request);
480: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
481: if($process eq 'lonc') {
482: $processpidfile = $processpidfile."lonc.pid";
483: if (!open(PIDFILE, "< $processpidfile")) {
484: return "error:Open failed for $processpidfile";
485: }
486: my $loncpid = <PIDFILE>;
487: close(PIDFILE);
488: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
489: ."</font>");
490: kill("USR2", $loncpid);
491: } elsif ($process eq 'lond') {
492: logthis('<font color="red"> Reinitializing self (lond) </font>');
493: &UpdateHosts; # Lond is us!!
494: } else {
495: &logthis('<font color="yellow" Invalid reinit request for '.$process
496: ."</font>");
497: return "error:Invalid process identifier $process";
498: }
499: return 'ok';
500: }
501: # Validate a line in a configuration file edit script:
502: # Validation includes:
503: # - Ensuring the command is valid.
504: # - Ensuring the command has sufficient parameters
505: # Parameters:
506: # scriptline - A line to validate (\n has been stripped for what it's worth).
507: #
508: # Return:
509: # 0 - Invalid scriptline.
510: # 1 - Valid scriptline
511: # NOTE:
512: # Only the command syntax is checked, not the executability of the
513: # command.
514: #
515: sub isValidEditCommand {
516: my $scriptline = shift;
517:
518: # Line elements are pipe separated:
519:
520: my ($command, $key, $newline) = split(/\|/, $scriptline);
521: &logthis('<font color="green"> isValideditCommand checking: '.
522: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
523:
524: if ($command eq "delete") {
525: #
526: # key with no newline.
527: #
528: if( ($key eq "") || ($newline ne "")) {
529: return 0; # Must have key but no newline.
530: } else {
531: return 1; # Valid syntax.
532: }
533: } elsif ($command eq "replace") {
534: #
535: # key and newline:
536: #
537: if (($key eq "") || ($newline eq "")) {
538: return 0;
539: } else {
540: return 1;
541: }
542: } elsif ($command eq "append") {
543: if (($key ne "") && ($newline eq "")) {
544: return 1;
545: } else {
546: return 0;
547: }
548: } else {
549: return 0; # Invalid command.
550: }
551: return 0; # Should not get here!!!
552: }
553: #
554: # ApplyEdit - Applies an edit command to a line in a configuration
555: # file. It is the caller's responsiblity to validate the
556: # edit line.
557: # Parameters:
558: # $directive - A single edit directive to apply.
559: # Edit directives are of the form:
560: # append|newline - Appends a new line to the file.
561: # replace|key|newline - Replaces the line with key value 'key'
562: # delete|key - Deletes the line with key value 'key'.
563: # $editor - A config file editor object that contains the
564: # file being edited.
565: #
566: sub ApplyEdit {
567: my $directive = shift;
568: my $editor = shift;
569:
570: # Break the directive down into its command and its parameters
571: # (at most two at this point. The meaning of the parameters, if in fact
572: # they exist depends on the command).
573:
574: my ($command, $p1, $p2) = split(/\|/, $directive);
575:
576: if($command eq "append") {
577: $editor->Append($p1); # p1 - key p2 null.
578: } elsif ($command eq "replace") {
579: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
580: } elsif ($command eq "delete") {
581: $editor->DeleteLine($p1); # p1 - key p2 null.
582: } else { # Should not get here!!!
583: die "Invalid command given to ApplyEdit $command"
584: }
585: }
586: #
587: # AdjustOurHost:
588: # Adjusts a host file stored in a configuration file editor object
589: # for the true IP address of this host. This is necessary for hosts
590: # that live behind a firewall.
591: # Those hosts have a publicly distributed IP of the firewall, but
592: # internally must use their actual IP. We assume that a given
593: # host only has a single IP interface for now.
594: # Formal Parameters:
595: # editor - The configuration file editor to adjust. This
596: # editor is assumed to contain a hosts.tab file.
597: # Strategy:
598: # - Figure out our hostname.
599: # - Lookup the entry for this host.
600: # - Modify the line to contain our IP
601: # - Do a replace for this host.
602: sub AdjustOurHost {
603: my $editor = shift;
604:
605: # figure out who I am.
606:
607: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
608:
609: # Get my host file entry.
610:
611: my $ConfigLine = $editor->Find($myHostName);
612: if(! (defined $ConfigLine)) {
613: die "AdjustOurHost - no entry for me in hosts file $myHostName";
614: }
615: # figure out my IP:
616: # Use the config line to get my hostname.
617: # Use gethostbyname to translate that into an IP address.
618: #
619: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
620: my $BinaryIp = gethostbyname($name);
621: my $ip = inet_ntoa($ip);
622: #
623: # Reassemble the config line from the elements in the list.
624: # Note that if the loncnew items were not present before, they will
625: # be now even if they would be empty
626: #
627: my $newConfigLine = $id;
628: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
629: $newConfigLine .= ":".$item;
630: }
631: # Replace the line:
632:
633: $editor->ReplaceLine($id, $newConfigLine);
634:
635: }
636: #
637: # ReplaceConfigFile:
638: # Replaces a configuration file with the contents of a
639: # configuration file editor object.
640: # This is done by:
641: # - Copying the target file to <filename>.old
642: # - Writing the new file to <filename>.tmp
643: # - Moving <filename.tmp> -> <filename>
644: # This laborious process ensures that the system is never without
645: # a configuration file that's at least valid (even if the contents
646: # may be dated).
647: # Parameters:
648: # filename - Name of the file to modify... this is a full path.
649: # editor - Editor containing the file.
650: #
651: sub ReplaceConfigFile {
652: my $filename = shift;
653: my $editor = shift;
654:
655: CopyFile ($filename, $filename.".old");
656:
657: my $contents = $editor->Get(); # Get the contents of the file.
658:
659: InstallFile($filename, $contents);
660: }
661: #
662: #
663: # Called to edit a configuration table file
664: # Parameters:
665: # request - The entire command/request sent by lonc or lonManage
666: # Return:
667: # The reply to send to the client.
668: #
669: sub EditFile {
670: my $request = shift;
671:
672: # Split the command into it's pieces: edit:filetype:script
673:
674: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
675:
676: # Check the pre-coditions for success:
677:
678: if($request != "edit") { # Something is amiss afoot alack.
679: return "error:edit request detected, but request != 'edit'\n";
680: }
681: if( ($filetype ne "hosts") &&
682: ($filetype ne "domain")) {
683: return "error:edit requested with invalid file specifier: $filetype \n";
684: }
685:
686: # Split the edit script and check it's validity.
687:
688: my @scriptlines = split(/\n/, $script); # one line per element.
689: my $linecount = scalar(@scriptlines);
690: for(my $i = 0; $i < $linecount; $i++) {
691: chomp($scriptlines[$i]);
692: if(!isValidEditCommand($scriptlines[$i])) {
693: return "error:edit with bad script line: '$scriptlines[$i]' \n";
694: }
695: }
696:
697: # Execute the edit operation.
698: # - Create a config file editor for the appropriate file and
699: # - execute each command in the script:
700: #
701: my $configfile = ConfigFileFromSelector($filetype);
702: if (!(defined $configfile)) {
703: return "refused\n";
704: }
705: my $editor = ConfigFileEdit->new($configfile);
706:
707: for (my $i = 0; $i < $linecount; $i++) {
708: ApplyEdit($scriptlines[$i], $editor);
709: }
710: # If the file is the host file, ensure that our host is
711: # adjusted to have our ip:
712: #
713: if($filetype eq "host") {
714: AdjustOurHost($editor);
715: }
716: # Finally replace the current file with our file.
717: #
718: ReplaceConfigFile($configfile, $editor);
719:
720: return "ok\n";
721: }
722: #
723: # Convert an error return code from lcpasswd to a string value.
724: #
725: sub lcpasswdstrerror {
726: my $ErrorCode = shift;
727: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
728: return "lcpasswd Unrecognized error return value ".$ErrorCode;
729: } else {
730: return $passwderrors[$ErrorCode];
731: }
732: }
733:
734: #
735: # Convert an error return code from lcuseradd to a string value:
736: #
737: sub lcuseraddstrerror {
738: my $ErrorCode = shift;
739: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
740: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
741: } else {
742: return $adderrors[$ErrorCode];
743: }
744: }
745:
746: # grabs exception and records it to log before exiting
747: sub catchexception {
748: my ($error)=@_;
749: $SIG{'QUIT'}='DEFAULT';
750: $SIG{__DIE__}='DEFAULT';
751: &status("Catching exception");
752: &logthis("<font color=red>CRITICAL: "
753: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
754: ."a crash with this error msg->[$error]</font>");
755: &logthis('Famous last words: '.$status.' - '.$lastlog);
756: if ($client) { print $client "error: $error\n"; }
757: $server->close();
758: die($error);
759: }
760:
761: sub timeout {
762: &status("Handling Timeout");
763: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
764: &catchexception('Timeout');
765: }
766: # -------------------------------- Set signal handlers to record abnormal exits
767:
768: $SIG{'QUIT'}=\&catchexception;
769: $SIG{__DIE__}=\&catchexception;
770:
771: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
772: &status("Read loncapa.conf and loncapa_apache.conf");
773: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
774: %perlvar=%{$perlvarref};
775: undef $perlvarref;
776:
777: # ----------------------------- Make sure this process is running from user=www
778: my $wwwid=getpwnam('www');
779: if ($wwwid!=$<) {
780: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
781: my $subj="LON: $currenthostid User ID mismatch";
782: system("echo 'User ID mismatch. lond must be run as user www.' |\
783: mailto $emailto -s '$subj' > /dev/null");
784: exit 1;
785: }
786:
787: # --------------------------------------------- Check if other instance running
788:
789: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
790:
791: if (-e $pidfile) {
792: my $lfh=IO::File->new("$pidfile");
793: my $pide=<$lfh>;
794: chomp($pide);
795: if (kill 0 => $pide) { die "already running"; }
796: }
797:
798: # ------------------------------------------------------------- Read hosts file
799:
800:
801:
802: # establish SERVER socket, bind and listen.
803: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
804: Type => SOCK_STREAM,
805: Proto => 'tcp',
806: Reuse => 1,
807: Listen => 10 )
808: or die "making socket: $@\n";
809:
810: # --------------------------------------------------------- Do global variables
811:
812: # global variables
813:
814: my %children = (); # keys are current child process IDs
815: my $children = 0; # current number of children
816:
817: sub REAPER { # takes care of dead children
818: $SIG{CHLD} = \&REAPER;
819: &status("Handling child death");
820: my $pid = wait;
821: if (defined($children{$pid})) {
822: &logthis("Child $pid died");
823: $children --;
824: delete $children{$pid};
825: } else {
826: &logthis("Unknown Child $pid died");
827: }
828: &status("Finished Handling child death");
829: }
830:
831: sub HUNTSMAN { # signal handler for SIGINT
832: &status("Killing children (INT)");
833: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
834: kill 'INT' => keys %children;
835: &logthis("Free socket: ".shutdown($server,2)); # free up socket
836: my $execdir=$perlvar{'lonDaemons'};
837: unlink("$execdir/logs/lond.pid");
838: &logthis("<font color=red>CRITICAL: Shutting down</font>");
839: &status("Done killing children");
840: exit; # clean up with dignity
841: }
842:
843: sub HUPSMAN { # signal handler for SIGHUP
844: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
845: &status("Killing children for restart (HUP)");
846: kill 'INT' => keys %children;
847: &logthis("Free socket: ".shutdown($server,2)); # free up socket
848: &logthis("<font color=red>CRITICAL: Restarting</font>");
849: my $execdir=$perlvar{'lonDaemons'};
850: unlink("$execdir/logs/lond.pid");
851: &status("Restarting self (HUP)");
852: exec("$execdir/lond"); # here we go again
853: }
854:
855: #
856: # Kill off hashes that describe the host table prior to re-reading it.
857: # Hashes affected are:
858: # %hostid, %hostdom %hostip
859: #
860: sub KillHostHashes {
861: foreach my $key (keys %hostid) {
862: delete $hostid{$key};
863: }
864: foreach my $key (keys %hostdom) {
865: delete $hostdom{$key};
866: }
867: foreach my $key (keys %hostip) {
868: delete $hostip{$key};
869: }
870: }
871: #
872: # Read in the host table from file and distribute it into the various hashes:
873: #
874: # - %hostid - Indexed by IP, the loncapa hostname.
875: # - %hostdom - Indexed by loncapa hostname, the domain.
876: # - %hostip - Indexed by hostid, the Ip address of the host.
877: sub ReadHostTable {
878:
879: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
880:
881: while (my $configline=<CONFIG>) {
882: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
883: chomp($ip); $ip=~s/\D+$//;
884: $hostid{$ip}=$id;
885: $hostdom{$id}=$domain;
886: $hostip{$id}=$ip;
887: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
888: }
889: close(CONFIG);
890: }
891: #
892: # Reload the Apache daemon's state.
893: # This is done by invoking /home/httpd/perl/apachereload
894: # a setuid perl script that can be root for us to do this job.
895: #
896: sub ReloadApache {
897: my $execdir = $perlvar{'lonDaemons'};
898: my $script = $execdir."/apachereload";
899: system($script);
900: }
901:
902: #
903: # Called in response to a USR2 signal.
904: # - Reread hosts.tab
905: # - All children connected to hosts that were removed from hosts.tab
906: # are killed via SIGINT
907: # - All children connected to previously existing hosts are sent SIGUSR1
908: # - Our internal hosts hash is updated to reflect the new contents of
909: # hosts.tab causing connections from hosts added to hosts.tab to
910: # now be honored.
911: #
912: sub UpdateHosts {
913: &status("Reload hosts.tab");
914: logthis('<font color="blue"> Updating connections </font>');
915: #
916: # The %children hash has the set of IP's we currently have children
917: # on. These need to be matched against records in the hosts.tab
918: # Any ip's no longer in the table get killed off they correspond to
919: # either dropped or changed hosts. Note that the re-read of the table
920: # will take care of new and changed hosts as connections come into being.
921:
922:
923: KillHostHashes;
924: ReadHostTable;
925:
926: foreach my $child (keys %children) {
927: my $childip = $children{$child};
928: if(!$hostid{$childip}) {
929: logthis('<font color="blue"> UpdateHosts killing child '
930: ." $child for ip $childip </font>");
931: kill('INT', $child);
932: } else {
933: logthis('<font color="green"> keeping child for ip '
934: ." $childip (pid=$child) </font>");
935: }
936: }
937: ReloadApache;
938: &status("Finished reloading hosts.tab");
939: }
940:
941:
942: sub checkchildren {
943: &status("Checking on the children (sending signals)");
944: &initnewstatus();
945: &logstatus();
946: &logthis('Going to check on the children');
947: my $docdir=$perlvar{'lonDocRoot'};
948: foreach (sort keys %children) {
949: sleep 1;
950: unless (kill 'USR1' => $_) {
951: &logthis ('Child '.$_.' is dead');
952: &logstatus($$.' is dead');
953: }
954: }
955: sleep 5;
956: $SIG{ALRM} = sub { die "timeout" };
957: $SIG{__DIE__} = 'DEFAULT';
958: &status("Checking on the children (waiting for reports)");
959: foreach (sort keys %children) {
960: unless (-e "$docdir/lon-status/londchld/$_.txt") {
961: eval {
962: alarm(300);
963: &logthis('Child '.$_.' did not respond');
964: kill 9 => $_;
965: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
966: #$subj="LON: $currenthostid killed lond process $_";
967: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
968: #$execdir=$perlvar{'lonDaemons'};
969: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
970: alarm(0);
971: }
972: }
973: }
974: $SIG{ALRM} = 'DEFAULT';
975: $SIG{__DIE__} = \&catchexception;
976: &status("Finished checking children");
977: }
978:
979: # --------------------------------------------------------------------- Logging
980:
981: sub logthis {
982: my $message=shift;
983: my $execdir=$perlvar{'lonDaemons'};
984: my $fh=IO::File->new(">>$execdir/logs/lond.log");
985: my $now=time;
986: my $local=localtime($now);
987: $lastlog=$local.': '.$message;
988: print $fh "$local ($$): $message\n";
989: }
990:
991: # ------------------------- Conditional log if $DEBUG true.
992: sub Debug {
993: my $message = shift;
994: if($DEBUG) {
995: &logthis($message);
996: }
997: }
998:
999: #
1000: # Sub to do replies to client.. this gives a hook for some
1001: # debug tracing too:
1002: # Parameters:
1003: # fd - File open on client.
1004: # reply - Text to send to client.
1005: # request - Original request from client.
1006: #
1007: sub Reply {
1008: my $fd = shift;
1009: my $reply = shift;
1010: my $request = shift;
1011:
1012: print $fd $reply;
1013: Debug("Request was $request Reply was $reply");
1014:
1015: }
1016: # ------------------------------------------------------------------ Log status
1017:
1018: sub logstatus {
1019: &status("Doing logging");
1020: my $docdir=$perlvar{'lonDocRoot'};
1021: {
1022: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
1023: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
1024: $fh->close();
1025: }
1026: &status("Finished londstatus.txt");
1027: {
1028: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1029: print $fh $status."\n".$lastlog."\n".time;
1030: $fh->close();
1031: }
1032: &status("Finished logging");
1033: }
1034:
1035: sub initnewstatus {
1036: my $docdir=$perlvar{'lonDocRoot'};
1037: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
1038: my $now=time;
1039: my $local=localtime($now);
1040: print $fh "LOND status $local - parent $$\n\n";
1041: opendir(DIR,"$docdir/lon-status/londchld");
1042: while (my $filename=readdir(DIR)) {
1043: unlink("$docdir/lon-status/londchld/$filename");
1044: }
1045: closedir(DIR);
1046: }
1047:
1048: # -------------------------------------------------------------- Status setting
1049:
1050: sub status {
1051: my $what=shift;
1052: my $now=time;
1053: my $local=localtime($now);
1054: $status=$local.': '.$what;
1055: $0='lond: '.$what.' '.$local;
1056: }
1057:
1058: # -------------------------------------------------------- Escape Special Chars
1059:
1060: sub escape {
1061: my $str=shift;
1062: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
1063: return $str;
1064: }
1065:
1066: # ----------------------------------------------------- Un-Escape Special Chars
1067:
1068: sub unescape {
1069: my $str=shift;
1070: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1071: return $str;
1072: }
1073:
1074: # ----------------------------------------------------------- Send USR1 to lonc
1075:
1076: sub reconlonc {
1077: my $peerfile=shift;
1078: &logthis("Trying to reconnect for $peerfile");
1079: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
1080: if (my $fh=IO::File->new("$loncfile")) {
1081: my $loncpid=<$fh>;
1082: chomp($loncpid);
1083: if (kill 0 => $loncpid) {
1084: &logthis("lonc at pid $loncpid responding, sending USR1");
1085: kill USR1 => $loncpid;
1086: } else {
1087: &logthis(
1088: "<font color=red>CRITICAL: "
1089: ."lonc at pid $loncpid not responding, giving up</font>");
1090: }
1091: } else {
1092: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1093: }
1094: }
1095:
1096: # -------------------------------------------------- Non-critical communication
1097:
1098: sub subreply {
1099: my ($cmd,$server)=@_;
1100: my $peerfile="$perlvar{'lonSockDir'}/$server";
1101: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
1102: Type => SOCK_STREAM,
1103: Timeout => 10)
1104: or return "con_lost";
1105: print $sclient "$cmd\n";
1106: my $answer=<$sclient>;
1107: chomp($answer);
1108: if (!$answer) { $answer="con_lost"; }
1109: return $answer;
1110: }
1111:
1112: sub reply {
1113: my ($cmd,$server)=@_;
1114: my $answer;
1115: if ($server ne $currenthostid) {
1116: $answer=subreply($cmd,$server);
1117: if ($answer eq 'con_lost') {
1118: $answer=subreply("ping",$server);
1119: if ($answer ne $server) {
1120: &logthis("sub reply: answer != server answer is $answer, server is $server");
1121: &reconlonc("$perlvar{'lonSockDir'}/$server");
1122: }
1123: $answer=subreply($cmd,$server);
1124: }
1125: } else {
1126: $answer='self_reply';
1127: }
1128: return $answer;
1129: }
1130:
1131: # -------------------------------------------------------------- Talk to lonsql
1132:
1133: sub sqlreply {
1134: my ($cmd)=@_;
1135: my $answer=subsqlreply($cmd);
1136: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
1137: return $answer;
1138: }
1139:
1140: sub subsqlreply {
1141: my ($cmd)=@_;
1142: my $unixsock="mysqlsock";
1143: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
1144: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
1145: Type => SOCK_STREAM,
1146: Timeout => 10)
1147: or return "con_lost";
1148: print $sclient "$cmd\n";
1149: my $answer=<$sclient>;
1150: chomp($answer);
1151: if (!$answer) { $answer="con_lost"; }
1152: return $answer;
1153: }
1154:
1155: # -------------------------------------------- Return path to profile directory
1156:
1157: sub propath {
1158: my ($udom,$uname)=@_;
1159: $udom=~s/\W//g;
1160: $uname=~s/\W//g;
1161: my $subdir=$uname.'__';
1162: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1163: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
1164: return $proname;
1165: }
1166:
1167: # --------------------------------------- Is this the home server of an author?
1168:
1169: sub ishome {
1170: my $author=shift;
1171: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1172: my ($udom,$uname)=split(/\//,$author);
1173: my $proname=propath($udom,$uname);
1174: if (-e $proname) {
1175: return 'owner';
1176: } else {
1177: return 'not_owner';
1178: }
1179: }
1180:
1181: # ======================================================= Continue main program
1182: # ---------------------------------------------------- Fork once and dissociate
1183:
1184: my $fpid=fork;
1185: exit if $fpid;
1186: die "Couldn't fork: $!" unless defined ($fpid);
1187:
1188: POSIX::setsid() or die "Can't start new session: $!";
1189:
1190: # ------------------------------------------------------- Write our PID on disk
1191:
1192: my $execdir=$perlvar{'lonDaemons'};
1193: open (PIDSAVE,">$execdir/logs/lond.pid");
1194: print PIDSAVE "$$\n";
1195: close(PIDSAVE);
1196: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1197: &status('Starting');
1198:
1199:
1200:
1201: # ----------------------------------------------------- Install signal handlers
1202:
1203:
1204: $SIG{CHLD} = \&REAPER;
1205: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1206: $SIG{HUP} = \&HUPSMAN;
1207: $SIG{USR1} = \&checkchildren;
1208: $SIG{USR2} = \&UpdateHosts;
1209:
1210: # Read the host hashes:
1211:
1212: ReadHostTable;
1213:
1214: # --------------------------------------------------------------
1215: # Accept connections. When a connection comes in, it is validated
1216: # and if good, a child process is created to process transactions
1217: # along the connection.
1218:
1219: while (1) {
1220: &status('Starting accept');
1221: $client = $server->accept() or next;
1222: &status('Accepted '.$client.' off to spawn');
1223: make_new_child($client);
1224: &status('Finished spawning');
1225: }
1226:
1227: sub make_new_child {
1228: my $pid;
1229: my $cipher;
1230: my $sigset;
1231:
1232: $client = shift;
1233: &status('Starting new child '.$client);
1234: &logthis('<font color="green"> Attempting to start child ('.$client.
1235: ")</font>");
1236: # block signal for fork
1237: $sigset = POSIX::SigSet->new(SIGINT);
1238: sigprocmask(SIG_BLOCK, $sigset)
1239: or die "Can't block SIGINT for fork: $!\n";
1240:
1241: die "fork: $!" unless defined ($pid = fork);
1242:
1243: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
1244: # connection liveness.
1245:
1246: #
1247: # Figure out who we're talking to so we can record the peer in
1248: # the pid hash.
1249: #
1250: my $caller = getpeername($client);
1251: my ($port,$iaddr)=unpack_sockaddr_in($caller);
1252: $clientip=inet_ntoa($iaddr);
1253:
1254: if ($pid) {
1255: # Parent records the child's birth and returns.
1256: sigprocmask(SIG_UNBLOCK, $sigset)
1257: or die "Can't unblock SIGINT for fork: $!\n";
1258: $children{$pid} = $clientip;
1259: $children++;
1260: &status('Started child '.$pid);
1261: return;
1262: } else {
1263: # Child can *not* return from this subroutine.
1264: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1265: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
1266: #don't get intercepted
1267: $SIG{USR1}= \&logstatus;
1268: $SIG{ALRM}= \&timeout;
1269: $lastlog='Forked ';
1270: $status='Forked';
1271:
1272: # unblock signals
1273: sigprocmask(SIG_UNBLOCK, $sigset)
1274: or die "Can't unblock SIGINT for fork: $!\n";
1275:
1276: my $tmpsnum=0;
1277: #---------------------------------------------------- kerberos 5 initialization
1278: &Authen::Krb5::init_context();
1279: &Authen::Krb5::init_ets();
1280:
1281: &status('Accepted connection');
1282: # =============================================================================
1283: # do something with the connection
1284: # -----------------------------------------------------------------------------
1285: # see if we know client and check for spoof IP by challenge
1286:
1287: ReadManagerTable; # May also be a manager!!
1288:
1289: my $clientrec=($hostid{$clientip} ne undef);
1290: my $ismanager=($managers{$clientip} ne undef);
1291: $clientname = "[unknonwn]";
1292: if($clientrec) { # Establish client type.
1293: $ConnectionType = "client";
1294: $clientname = $hostid{$clientip};
1295: if($ismanager) {
1296: $ConnectionType = "both";
1297: }
1298: } else {
1299: $ConnectionType = "manager";
1300: $clientname = $managers{$clientip};
1301: }
1302: my $clientok;
1303: if ($clientrec || $ismanager) {
1304: &status("Waiting for init from $clientip $clientname");
1305: &logthis('<font color="yellow">INFO: Connection, '.
1306: $clientip.
1307: " ($clientname) connection type = $ConnectionType </font>" );
1308: &status("Connecting $clientip ($clientname))");
1309: my $remotereq=<$client>;
1310: $remotereq=~s/[^\w:]//g;
1311: if ($remotereq =~ /^init/) {
1312: &sethost("sethost:$perlvar{'lonHostID'}");
1313: my $challenge="$$".time;
1314: print $client "$challenge\n";
1315: &status(
1316: "Waiting for challenge reply from $clientip ($clientname)");
1317: $remotereq=<$client>;
1318: $remotereq=~s/\W//g;
1319: if ($challenge eq $remotereq) {
1320: $clientok=1;
1321: print $client "ok\n";
1322: } else {
1323: &logthis(
1324: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
1325: &status('No challenge reply '.$clientip);
1326: }
1327: } else {
1328: &logthis(
1329: "<font color=blue>WARNING: "
1330: ."$clientip failed to initialize: >$remotereq< </font>");
1331: &status('No init '.$clientip);
1332: }
1333: } else {
1334: &logthis(
1335: "<font color=blue>WARNING: Unknown client $clientip</font>");
1336: &status('Hung up on '.$clientip);
1337: }
1338: if ($clientok) {
1339: # ---------------- New known client connecting, could mean machine online again
1340:
1341: foreach my $id (keys(%hostip)) {
1342: if ($hostip{$id} ne $clientip ||
1343: $hostip{$currenthostid} eq $clientip) {
1344: # no need to try to do recon's to myself
1345: next;
1346: }
1347: &reconlonc("$perlvar{'lonSockDir'}/$id");
1348: }
1349: &logthis("<font color=green>Established connection: $clientname</font>");
1350: &status('Will listen to '.$clientname);
1351: # ------------------------------------------------------------ Process requests
1352: while (my $userinput=<$client>) {
1353: chomp($userinput);
1354: Debug("Request = $userinput\n");
1355: &status('Processing '.$clientname.': '.$userinput);
1356: my $wasenc=0;
1357: alarm(120);
1358: # ------------------------------------------------------------ See if encrypted
1359: if ($userinput =~ /^enc/) {
1360: if ($cipher) {
1361: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
1362: $userinput='';
1363: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
1364: $userinput.=
1365: $cipher->decrypt(
1366: pack("H16",substr($encinput,$encidx,16))
1367: );
1368: }
1369: $userinput=substr($userinput,0,$cmdlength);
1370: $wasenc=1;
1371: }
1372: }
1373:
1374: # ------------------------------------------------------------- Normal commands
1375: # ------------------------------------------------------------------------ ping
1376: if ($userinput =~ /^ping/) { # client only
1377: if(isClient) {
1378: print $client "$currenthostid\n";
1379: } else {
1380: Reply($client, "refused\n", $userinput);
1381: }
1382: # ------------------------------------------------------------------------ pong
1383: }elsif ($userinput =~ /^pong/) { # client only
1384: if(isClient) {
1385: my $reply=&reply("ping",$clientname);
1386: print $client "$currenthostid:$reply\n";
1387: } else {
1388: Reply($client, "refused\n", $userinput);
1389: }
1390: # ------------------------------------------------------------------------ ekey
1391: } elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
1392: my $buildkey=time.$$.int(rand 100000);
1393: $buildkey=~tr/1-6/A-F/;
1394: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1395: my $key=$currenthostid.$clientname;
1396: $key=~tr/a-z/A-Z/;
1397: $key=~tr/G-P/0-9/;
1398: $key=~tr/Q-Z/0-9/;
1399: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1400: $key=substr($key,0,32);
1401: my $cipherkey=pack("H32",$key);
1402: $cipher=new IDEA $cipherkey;
1403: print $client "$buildkey\n";
1404: # ------------------------------------------------------------------------ load
1405: } elsif ($userinput =~ /^load/) { # client only
1406: if (isClient) {
1407: my $loadavg;
1408: {
1409: my $loadfile=IO::File->new('/proc/loadavg');
1410: $loadavg=<$loadfile>;
1411: }
1412: $loadavg =~ s/\s.*//g;
1413: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1414: print $client "$loadpercent\n";
1415: } else {
1416: Reply($client, "refused\n", $userinput);
1417:
1418: }
1419: # -------------------------------------------------------------------- userload
1420: } elsif ($userinput =~ /^userload/) { # client only
1421: if(isClient) {
1422: my $userloadpercent=&userload();
1423: print $client "$userloadpercent\n";
1424: } else {
1425: Reply($client, "refused\n", $userinput);
1426:
1427: }
1428: #
1429: # Transactions requiring encryption:
1430: #
1431: # ----------------------------------------------------------------- currentauth
1432: } elsif ($userinput =~ /^currentauth/) {
1433: if (($wasenc==1) && isClient) { # Encoded & client only.
1434: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1435: my $result = GetAuthType($udom, $uname);
1436: if($result eq "nouser") {
1437: print $client "unknown_user\n";
1438: }
1439: else {
1440: print $client "$result\n"
1441: }
1442: } else {
1443: Reply($client, "refused\n", $userinput);
1444:
1445: }
1446: #--------------------------------------------------------------------- pushfile
1447: } elsif($userinput =~ /^pushfile/) { # encoded & manager.
1448: if(($wasenc == 1) && isManager) {
1449: my $cert = GetCertificate($userinput);
1450: if(ValidManager($cert)) {
1451: my $reply = PushFile($userinput);
1452: print $client "$reply\n";
1453: } else {
1454: print $client "refused\n";
1455: }
1456: } else {
1457: Reply($client, "refused\n", $userinput);
1458:
1459: }
1460: #--------------------------------------------------------------------- reinit
1461: } elsif($userinput =~ /^reinit/) { # Encoded and manager
1462: if (($wasenc == 1) && isManager) {
1463: my $cert = GetCertificate($userinput);
1464: if(ValidManager($cert)) {
1465: chomp($userinput);
1466: my $reply = ReinitProcess($userinput);
1467: print $client "$reply\n";
1468: } else {
1469: print $client "refused\n";
1470: }
1471: } else {
1472: Reply($client, "refused\n", $userinput);
1473: }
1474: #------------------------------------------------------------------------- edit
1475: } elsif ($userinput =~ /^edit/) { # encoded and manager:
1476: if(($wasenc ==1) && (isManager)) {
1477: my $cert = GetCertificate($userinput);
1478: if(ValidManager($cert)) {
1479: my($command, $filetype, $script) = split(/:/, $userinput);
1480: if (($filetype eq "hosts") || ($filetype eq "domain")) {
1481: if($script ne "") {
1482: Reply($client, EditFile($userinput));
1483: } else {
1484: Reply($client,"refused\n",$userinput);
1485: }
1486: } else {
1487: Reply($client,"refused\n",$userinput);
1488: }
1489: } else {
1490: Reply($client,"refused\n",$userinput);
1491: }
1492: } else {
1493: Reply($client,"refused\n",$userinput);
1494: }
1495: # ------------------------------------------------------------------------ auth
1496: } elsif ($userinput =~ /^auth/) { # Encoded and client only.
1497: if (($wasenc==1) && isClient) {
1498: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1499: chomp($upass);
1500: $upass=unescape($upass);
1501: my $proname=propath($udom,$uname);
1502: my $passfilename="$proname/passwd";
1503: if (-e $passfilename) {
1504: my $pf = IO::File->new($passfilename);
1505: my $realpasswd=<$pf>;
1506: chomp($realpasswd);
1507: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1508: my $pwdcorrect=0;
1509: if ($howpwd eq 'internal') {
1510: &Debug("Internal auth");
1511: $pwdcorrect=
1512: (crypt($upass,$contentpwd) eq $contentpwd);
1513: } elsif ($howpwd eq 'unix') {
1514: &Debug("Unix auth");
1515: if((getpwnam($uname))[1] eq "") { #no such user!
1516: $pwdcorrect = 0;
1517: } else {
1518: $contentpwd=(getpwnam($uname))[1];
1519: my $pwauth_path="/usr/local/sbin/pwauth";
1520: unless ($contentpwd eq 'x') {
1521: $pwdcorrect=
1522: (crypt($upass,$contentpwd) eq
1523: $contentpwd);
1524: }
1525:
1526: elsif (-e $pwauth_path) {
1527: open PWAUTH, "|$pwauth_path" or
1528: die "Cannot invoke authentication";
1529: print PWAUTH "$uname\n$upass\n";
1530: close PWAUTH;
1531: $pwdcorrect=!$?;
1532: }
1533: }
1534: } elsif ($howpwd eq 'krb4') {
1535: my $null=pack("C",0);
1536: unless ($upass=~/$null/) {
1537: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1538: ($uname,"",$contentpwd,'krbtgt',
1539: $contentpwd,1,$upass);
1540: if (!$krb4_error) {
1541: $pwdcorrect = 1;
1542: } else {
1543: $pwdcorrect=0;
1544: # log error if it is not a bad password
1545: if ($krb4_error != 62) {
1546: &logthis('krb4:'.$uname.','.$contentpwd.','.
1547: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1548: }
1549: }
1550: }
1551: } elsif ($howpwd eq 'krb5') {
1552: my $null=pack("C",0);
1553: unless ($upass=~/$null/) {
1554: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1555: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1556: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1557: my $credentials=&Authen::Krb5::cc_default();
1558: $credentials->initialize($krbclient);
1559: my $krbreturn =
1560: &Authen::Krb5::get_in_tkt_with_password(
1561: $krbclient,$krbserver,$upass,$credentials);
1562: # unless ($krbreturn) {
1563: # &logthis("Krb5 Error: ".
1564: # &Authen::Krb5::error());
1565: # }
1566: $pwdcorrect = ($krbreturn == 1);
1567: } else { $pwdcorrect=0; }
1568: } elsif ($howpwd eq 'localauth') {
1569: $pwdcorrect=&localauth::localauth($uname,$upass,
1570: $contentpwd);
1571: }
1572: if ($pwdcorrect) {
1573: print $client "authorized\n";
1574: } else {
1575: print $client "non_authorized\n";
1576: }
1577: } else {
1578: print $client "unknown_user\n";
1579: }
1580: } else {
1581: Reply($client, "refused\n", $userinput);
1582:
1583: }
1584: # ---------------------------------------------------------------------- passwd
1585: } elsif ($userinput =~ /^passwd/) { # encoded and client
1586: if (($wasenc==1) && isClient) {
1587: my
1588: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1589: chomp($npass);
1590: $upass=&unescape($upass);
1591: $npass=&unescape($npass);
1592: &Debug("Trying to change password for $uname");
1593: my $proname=propath($udom,$uname);
1594: my $passfilename="$proname/passwd";
1595: if (-e $passfilename) {
1596: my $realpasswd;
1597: { my $pf = IO::File->new($passfilename);
1598: $realpasswd=<$pf>; }
1599: chomp($realpasswd);
1600: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1601: if ($howpwd eq 'internal') {
1602: &Debug("internal auth");
1603: if (crypt($upass,$contentpwd) eq $contentpwd) {
1604: my $salt=time;
1605: $salt=substr($salt,6,2);
1606: my $ncpass=crypt($npass,$salt);
1607: {
1608: my $pf;
1609: if ($pf = IO::File->new(">$passfilename")) {
1610: print $pf "internal:$ncpass\n";
1611: &logthis("Result of password change for $uname: pwchange_success");
1612: print $client "ok\n";
1613: } else {
1614: &logthis("Unable to open $uname passwd to change password");
1615: print $client "non_authorized\n";
1616: }
1617: }
1618:
1619: } else {
1620: print $client "non_authorized\n";
1621: }
1622: } elsif ($howpwd eq 'unix') {
1623: # Unix means we have to access /etc/password
1624: # one way or another.
1625: # First: Make sure the current password is
1626: # correct
1627: &Debug("auth is unix");
1628: $contentpwd=(getpwnam($uname))[1];
1629: my $pwdcorrect = "0";
1630: my $pwauth_path="/usr/local/sbin/pwauth";
1631: unless ($contentpwd eq 'x') {
1632: $pwdcorrect=
1633: (crypt($upass,$contentpwd) eq $contentpwd);
1634: } elsif (-e $pwauth_path) {
1635: open PWAUTH, "|$pwauth_path" or
1636: die "Cannot invoke authentication";
1637: print PWAUTH "$uname\n$upass\n";
1638: close PWAUTH;
1639: &Debug("exited pwauth with $? ($uname,$upass) ");
1640: $pwdcorrect=($? == 0);
1641: }
1642: if ($pwdcorrect) {
1643: my $execdir=$perlvar{'lonDaemons'};
1644: &Debug("Opening lcpasswd pipeline");
1645: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1646: print $pf "$uname\n$npass\n$npass\n";
1647: close $pf;
1648: my $err = $?;
1649: my $result = ($err>0 ? 'pwchange_failure'
1650: : 'ok');
1651: &logthis("Result of password change for $uname: ".
1652: &lcpasswdstrerror($?));
1653: print $client "$result\n";
1654: } else {
1655: print $client "non_authorized\n";
1656: }
1657: } else {
1658: print $client "auth_mode_error\n";
1659: }
1660: } else {
1661: print $client "unknown_user\n";
1662: }
1663: } else {
1664: Reply($client, "refused\n", $userinput);
1665:
1666: }
1667: # -------------------------------------------------------------------- makeuser
1668: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1669: &Debug("Make user received");
1670: my $oldumask=umask(0077);
1671: if (($wasenc==1) && isClient) {
1672: my
1673: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1674: &Debug("cmd =".$cmd." $udom =".$udom.
1675: " uname=".$uname);
1676: chomp($npass);
1677: $npass=&unescape($npass);
1678: my $proname=propath($udom,$uname);
1679: my $passfilename="$proname/passwd";
1680: &Debug("Password file created will be:".
1681: $passfilename);
1682: if (-e $passfilename) {
1683: print $client "already_exists\n";
1684: } elsif ($udom ne $currentdomainid) {
1685: print $client "not_right_domain\n";
1686: } else {
1687: my @fpparts=split(/\//,$proname);
1688: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1689: my $fperror='';
1690: for (my $i=3;$i<=$#fpparts;$i++) {
1691: $fpnow.='/'.$fpparts[$i];
1692: unless (-e $fpnow) {
1693: unless (mkdir($fpnow,0777)) {
1694: $fperror="error: ".($!+0)
1695: ." mkdir failed while attempting "
1696: ."makeuser";
1697: }
1698: }
1699: }
1700: unless ($fperror) {
1701: my $result=&make_passwd_file($uname, $umode,$npass,
1702: $passfilename);
1703: print $client $result;
1704: } else {
1705: print $client "$fperror\n";
1706: }
1707: }
1708: } else {
1709: Reply($client, "refused\n", $userinput);
1710:
1711: }
1712: umask($oldumask);
1713: # -------------------------------------------------------------- changeuserauth
1714: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1715: &Debug("Changing authorization");
1716: if (($wasenc==1) && isClient) {
1717: my
1718: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1719: chomp($npass);
1720: &Debug("cmd = ".$cmd." domain= ".$udom.
1721: "uname =".$uname." umode= ".$umode);
1722: $npass=&unescape($npass);
1723: my $proname=&propath($udom,$uname);
1724: my $passfilename="$proname/passwd";
1725: if ($udom ne $currentdomainid) {
1726: print $client "not_right_domain\n";
1727: } else {
1728: my $result=&make_passwd_file($uname, $umode,$npass,
1729: $passfilename);
1730: print $client $result;
1731: }
1732: } else {
1733: Reply($client, "refused\n", $userinput);
1734:
1735: }
1736: # ------------------------------------------------------------------------ home
1737: } elsif ($userinput =~ /^home/) { # client clear or encoded
1738: if(isClient) {
1739: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1740: chomp($uname);
1741: my $proname=propath($udom,$uname);
1742: if (-e $proname) {
1743: print $client "found\n";
1744: } else {
1745: print $client "not_found\n";
1746: }
1747: } else {
1748: Reply($client, "refused\n", $userinput);
1749:
1750: }
1751: # ---------------------------------------------------------------------- update
1752: } elsif ($userinput =~ /^update/) { # client clear or encoded.
1753: if(isClient) {
1754: my ($cmd,$fname)=split(/:/,$userinput);
1755: my $ownership=ishome($fname);
1756: if ($ownership eq 'not_owner') {
1757: if (-e $fname) {
1758: my ($dev,$ino,$mode,$nlink,
1759: $uid,$gid,$rdev,$size,
1760: $atime,$mtime,$ctime,
1761: $blksize,$blocks)=stat($fname);
1762: my $now=time;
1763: my $since=$now-$atime;
1764: if ($since>$perlvar{'lonExpire'}) {
1765: my $reply=
1766: &reply("unsub:$fname","$clientname");
1767: unlink("$fname");
1768: } else {
1769: my $transname="$fname.in.transfer";
1770: my $remoteurl=
1771: &reply("sub:$fname","$clientname");
1772: my $response;
1773: {
1774: my $ua=new LWP::UserAgent;
1775: my $request=new HTTP::Request('GET',"$remoteurl");
1776: $response=$ua->request($request,$transname);
1777: }
1778: if ($response->is_error()) {
1779: unlink($transname);
1780: my $message=$response->status_line;
1781: &logthis(
1782: "LWP GET: $message for $fname ($remoteurl)");
1783: } else {
1784: if ($remoteurl!~/\.meta$/) {
1785: my $ua=new LWP::UserAgent;
1786: my $mrequest=
1787: new HTTP::Request('GET',$remoteurl.'.meta');
1788: my $mresponse=
1789: $ua->request($mrequest,$fname.'.meta');
1790: if ($mresponse->is_error()) {
1791: unlink($fname.'.meta');
1792: }
1793: }
1794: rename($transname,$fname);
1795: }
1796: }
1797: print $client "ok\n";
1798: } else {
1799: print $client "not_found\n";
1800: }
1801: } else {
1802: print $client "rejected\n";
1803: }
1804: } else {
1805: Reply($client, "refused\n", $userinput);
1806:
1807: }
1808: # -------------------------------------- fetch a user file from a remote server
1809: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
1810: if(isClient) {
1811: my ($cmd,$fname)=split(/:/,$userinput);
1812: my ($udom,$uname,$ufile)=split(/\//,$fname);
1813: my $udir=propath($udom,$uname).'/userfiles';
1814: unless (-e $udir) { mkdir($udir,0770); }
1815: if (-e $udir) {
1816: $ufile=~s/^[\.\~]+//;
1817: $ufile=~s/\///g;
1818: my $destname=$udir.'/'.$ufile;
1819: my $transname=$udir.'/'.$ufile.'.in.transit';
1820: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1821: my $response;
1822: {
1823: my $ua=new LWP::UserAgent;
1824: my $request=new HTTP::Request('GET',"$remoteurl");
1825: $response=$ua->request($request,$transname);
1826: }
1827: if ($response->is_error()) {
1828: unlink($transname);
1829: my $message=$response->status_line;
1830: &logthis("LWP GET: $message for $fname ($remoteurl)");
1831: print $client "failed\n";
1832: } else {
1833: if (!rename($transname,$destname)) {
1834: &logthis("Unable to move $transname to $destname");
1835: unlink($transname);
1836: print $client "failed\n";
1837: } else {
1838: print $client "ok\n";
1839: }
1840: }
1841: } else {
1842: print $client "not_home\n";
1843: }
1844: } else {
1845: Reply($client, "refused\n", $userinput);
1846:
1847: }
1848: # ------------------------------------------ authenticate access to a user file
1849: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1850: if(isClient) {
1851: my ($cmd,$fname,$session)=split(/:/,$userinput);
1852: chomp($session);
1853: my $reply='non_auth';
1854: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1855: $session.'.id')) {
1856: while (my $line=<ENVIN>) {
1857: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1858: }
1859: close(ENVIN);
1860: print $client $reply."\n";
1861: } else {
1862: print $client "invalid_token\n";
1863: }
1864: } else {
1865: Reply($client, "refused\n", $userinput);
1866:
1867: }
1868: # ----------------------------------------------------------------- unsubscribe
1869: } elsif ($userinput =~ /^unsub/) {
1870: if(isClient) {
1871: my ($cmd,$fname)=split(/:/,$userinput);
1872: if (-e $fname) {
1873: print $client &unsub($client,$fname,$clientip);
1874: } else {
1875: print $client "not_found\n";
1876: }
1877: } else {
1878: Reply($client, "refused\n", $userinput);
1879:
1880: }
1881: # ------------------------------------------------------------------- subscribe
1882: } elsif ($userinput =~ /^sub/) {
1883: if(isClient) {
1884: print $client &subscribe($userinput,$clientip);
1885: } else {
1886: Reply($client, "refused\n", $userinput);
1887:
1888: }
1889: # ------------------------------------------------------------- current version
1890: } elsif ($userinput =~ /^currentversion/) {
1891: if(isClient) {
1892: my ($cmd,$fname)=split(/:/,$userinput);
1893: print $client ¤tversion($fname)."\n";
1894: } else {
1895: Reply($client, "refused\n", $userinput);
1896:
1897: }
1898: # ------------------------------------------------------------------------- log
1899: } elsif ($userinput =~ /^log/) {
1900: if(isClient) {
1901: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1902: chomp($what);
1903: my $proname=propath($udom,$uname);
1904: my $now=time;
1905: {
1906: my $hfh;
1907: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1908: print $hfh "$now:$clientname:$what\n";
1909: print $client "ok\n";
1910: } else {
1911: print $client "error: ".($!+0)
1912: ." IO::File->new Failed "
1913: ."while attempting log\n";
1914: }
1915: }
1916: } else {
1917: Reply($client, "refused\n", $userinput);
1918:
1919: }
1920: # ------------------------------------------------------------------------- put
1921: } elsif ($userinput =~ /^put/) {
1922: if(isClient) {
1923: my ($cmd,$udom,$uname,$namespace,$what)
1924: =split(/:/,$userinput);
1925: $namespace=~s/\//\_/g;
1926: $namespace=~s/\W//g;
1927: if ($namespace ne 'roles') {
1928: chomp($what);
1929: my $proname=propath($udom,$uname);
1930: my $now=time;
1931: unless ($namespace=~/^nohist\_/) {
1932: my $hfh;
1933: if (
1934: $hfh=IO::File->new(">>$proname/$namespace.hist")
1935: ) { print $hfh "P:$now:$what\n"; }
1936: }
1937: my @pairs=split(/\&/,$what);
1938: my %hash;
1939: if (tie(%hash,'GDBM_File',
1940: "$proname/$namespace.db",
1941: &GDBM_WRCREAT(),0640)) {
1942: foreach my $pair (@pairs) {
1943: my ($key,$value)=split(/=/,$pair);
1944: $hash{$key}=$value;
1945: }
1946: if (untie(%hash)) {
1947: print $client "ok\n";
1948: } else {
1949: print $client "error: ".($!+0)
1950: ." untie(GDBM) failed ".
1951: "while attempting put\n";
1952: }
1953: } else {
1954: print $client "error: ".($!)
1955: ." tie(GDBM) Failed ".
1956: "while attempting put\n";
1957: }
1958: } else {
1959: print $client "refused\n";
1960: }
1961: } else {
1962: Reply($client, "refused\n", $userinput);
1963:
1964: }
1965: # ------------------------------------------------------------------- inc
1966: } elsif ($userinput =~ /^inc:/) {
1967: if(isClient) {
1968: my ($cmd,$udom,$uname,$namespace,$what)
1969: =split(/:/,$userinput);
1970: $namespace=~s/\//\_/g;
1971: $namespace=~s/\W//g;
1972: if ($namespace ne 'roles') {
1973: chomp($what);
1974: my $proname=propath($udom,$uname);
1975: my $now=time;
1976: unless ($namespace=~/^nohist\_/) {
1977: my $hfh;
1978: if (
1979: $hfh=IO::File->new(">>$proname/$namespace.hist")
1980: ) { print $hfh "P:$now:$what\n"; }
1981: }
1982: my @pairs=split(/\&/,$what);
1983: my %hash;
1984: if (tie(%hash,'GDBM_File',
1985: "$proname/$namespace.db",
1986: &GDBM_WRCREAT(),0640)) {
1987: foreach my $pair (@pairs) {
1988: my ($key,$value)=split(/=/,$pair);
1989: # We could check that we have a number...
1990: if (! defined($value) || $value eq '') {
1991: $value = 1;
1992: }
1993: $hash{$key}+=$value;
1994: }
1995: if (untie(%hash)) {
1996: print $client "ok\n";
1997: } else {
1998: print $client "error: ".($!+0)
1999: ." untie(GDBM) failed ".
2000: "while attempting put\n";
2001: }
2002: } else {
2003: print $client "error: ".($!)
2004: ." tie(GDBM) Failed ".
2005: "while attempting put\n";
2006: }
2007: } else {
2008: print $client "refused\n";
2009: }
2010: } else {
2011: Reply($client, "refused\n", $userinput);
2012:
2013: }
2014: # -------------------------------------------------------------------- rolesput
2015: } elsif ($userinput =~ /^rolesput/) {
2016: if(isClient) {
2017: &Debug("rolesput");
2018: if ($wasenc==1) {
2019: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2020: =split(/:/,$userinput);
2021: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2022: "user = ".$exeuser." udom=".$udom.
2023: "what = ".$what);
2024: my $namespace='roles';
2025: chomp($what);
2026: my $proname=propath($udom,$uname);
2027: my $now=time;
2028: {
2029: my $hfh;
2030: if (
2031: $hfh=IO::File->new(">>$proname/$namespace.hist")
2032: ) {
2033: print $hfh "P:$now:$exedom:$exeuser:$what\n";
2034: }
2035: }
2036: my @pairs=split(/\&/,$what);
2037: my %hash;
2038: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2039: foreach my $pair (@pairs) {
2040: my ($key,$value)=split(/=/,$pair);
2041: &ManagePermissions($key, $udom, $uname,
2042: &GetAuthType( $udom,
2043: $uname));
2044: $hash{$key}=$value;
2045: }
2046: if (untie(%hash)) {
2047: print $client "ok\n";
2048: } else {
2049: print $client "error: ".($!+0)
2050: ." untie(GDBM) Failed ".
2051: "while attempting rolesput\n";
2052: }
2053: } else {
2054: print $client "error: ".($!+0)
2055: ." tie(GDBM) Failed ".
2056: "while attempting rolesput\n";
2057: }
2058: } else {
2059: print $client "refused\n";
2060: }
2061: } else {
2062: Reply($client, "refused\n", $userinput);
2063:
2064: }
2065: # -------------------------------------------------------------------- rolesdel
2066: } elsif ($userinput =~ /^rolesdel/) {
2067: if(isClient) {
2068: &Debug("rolesdel");
2069: if ($wasenc==1) {
2070: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2071: =split(/:/,$userinput);
2072: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2073: "user = ".$exeuser." udom=".$udom.
2074: "what = ".$what);
2075: my $namespace='roles';
2076: chomp($what);
2077: my $proname=propath($udom,$uname);
2078: my $now=time;
2079: {
2080: my $hfh;
2081: if (
2082: $hfh=IO::File->new(">>$proname/$namespace.hist")
2083: ) {
2084: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2085: }
2086: }
2087: my @rolekeys=split(/\&/,$what);
2088: my %hash;
2089: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2090: foreach my $key (@rolekeys) {
2091: delete $hash{$key};
2092: }
2093: if (untie(%hash)) {
2094: print $client "ok\n";
2095: } else {
2096: print $client "error: ".($!+0)
2097: ." untie(GDBM) Failed ".
2098: "while attempting rolesdel\n";
2099: }
2100: } else {
2101: print $client "error: ".($!+0)
2102: ." tie(GDBM) Failed ".
2103: "while attempting rolesdel\n";
2104: }
2105: } else {
2106: print $client "refused\n";
2107: }
2108: } else {
2109: Reply($client, "refused\n", $userinput);
2110:
2111: }
2112: # ------------------------------------------------------------------------- get
2113: } elsif ($userinput =~ /^get/) {
2114: if(isClient) {
2115: my ($cmd,$udom,$uname,$namespace,$what)
2116: =split(/:/,$userinput);
2117: $namespace=~s/\//\_/g;
2118: $namespace=~s/\W//g;
2119: chomp($what);
2120: my @queries=split(/\&/,$what);
2121: my $proname=propath($udom,$uname);
2122: my $qresult='';
2123: my %hash;
2124: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2125: for (my $i=0;$i<=$#queries;$i++) {
2126: $qresult.="$hash{$queries[$i]}&";
2127: }
2128: if (untie(%hash)) {
2129: $qresult=~s/\&$//;
2130: print $client "$qresult\n";
2131: } else {
2132: print $client "error: ".($!+0)
2133: ." untie(GDBM) Failed ".
2134: "while attempting get\n";
2135: }
2136: } else {
2137: if ($!+0 == 2) {
2138: print $client "error:No such file or ".
2139: "GDBM reported bad block error\n";
2140: } else {
2141: print $client "error: ".($!+0)
2142: ." tie(GDBM) Failed ".
2143: "while attempting get\n";
2144: }
2145: }
2146: } else {
2147: Reply($client, "refused\n", $userinput);
2148:
2149: }
2150: # ------------------------------------------------------------------------ eget
2151: } elsif ($userinput =~ /^eget/) {
2152: if (isClient) {
2153: my ($cmd,$udom,$uname,$namespace,$what)
2154: =split(/:/,$userinput);
2155: $namespace=~s/\//\_/g;
2156: $namespace=~s/\W//g;
2157: chomp($what);
2158: my @queries=split(/\&/,$what);
2159: my $proname=propath($udom,$uname);
2160: my $qresult='';
2161: my %hash;
2162: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2163: for (my $i=0;$i<=$#queries;$i++) {
2164: $qresult.="$hash{$queries[$i]}&";
2165: }
2166: if (untie(%hash)) {
2167: $qresult=~s/\&$//;
2168: if ($cipher) {
2169: my $cmdlength=length($qresult);
2170: $qresult.=" ";
2171: my $encqresult='';
2172: for
2173: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2174: $encqresult.=
2175: unpack("H16",
2176: $cipher->encrypt(substr($qresult,$encidx,8)));
2177: }
2178: print $client "enc:$cmdlength:$encqresult\n";
2179: } else {
2180: print $client "error:no_key\n";
2181: }
2182: } else {
2183: print $client "error: ".($!+0)
2184: ." untie(GDBM) Failed ".
2185: "while attempting eget\n";
2186: }
2187: } else {
2188: print $client "error: ".($!+0)
2189: ." tie(GDBM) Failed ".
2190: "while attempting eget\n";
2191: }
2192: } else {
2193: Reply($client, "refused\n", $userinput);
2194:
2195: }
2196: # ------------------------------------------------------------------------- del
2197: } elsif ($userinput =~ /^del/) {
2198: if(isClient) {
2199: my ($cmd,$udom,$uname,$namespace,$what)
2200: =split(/:/,$userinput);
2201: $namespace=~s/\//\_/g;
2202: $namespace=~s/\W//g;
2203: chomp($what);
2204: my $proname=propath($udom,$uname);
2205: my $now=time;
2206: unless ($namespace=~/^nohist\_/) {
2207: my $hfh;
2208: if (
2209: $hfh=IO::File->new(">>$proname/$namespace.hist")
2210: ) { print $hfh "D:$now:$what\n"; }
2211: }
2212: my @keys=split(/\&/,$what);
2213: my %hash;
2214: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2215: foreach my $key (@keys) {
2216: delete($hash{$key});
2217: }
2218: if (untie(%hash)) {
2219: print $client "ok\n";
2220: } else {
2221: print $client "error: ".($!+0)
2222: ." untie(GDBM) Failed ".
2223: "while attempting del\n";
2224: }
2225: } else {
2226: print $client "error: ".($!+0)
2227: ." tie(GDBM) Failed ".
2228: "while attempting del\n";
2229: }
2230: } else {
2231: Reply($client, "refused\n", $userinput);
2232:
2233: }
2234: # ------------------------------------------------------------------------ keys
2235: } elsif ($userinput =~ /^keys/) {
2236: if(isClient) {
2237: my ($cmd,$udom,$uname,$namespace)
2238: =split(/:/,$userinput);
2239: $namespace=~s/\//\_/g;
2240: $namespace=~s/\W//g;
2241: my $proname=propath($udom,$uname);
2242: my $qresult='';
2243: my %hash;
2244: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2245: foreach my $key (keys %hash) {
2246: $qresult.="$key&";
2247: }
2248: if (untie(%hash)) {
2249: $qresult=~s/\&$//;
2250: print $client "$qresult\n";
2251: } else {
2252: print $client "error: ".($!+0)
2253: ." untie(GDBM) Failed ".
2254: "while attempting keys\n";
2255: }
2256: } else {
2257: print $client "error: ".($!+0)
2258: ." tie(GDBM) Failed ".
2259: "while attempting keys\n";
2260: }
2261: } else {
2262: Reply($client, "refused\n", $userinput);
2263:
2264: }
2265: # ----------------------------------------------------------------- dumpcurrent
2266: } elsif ($userinput =~ /^currentdump/) {
2267: if (isClient) {
2268: my ($cmd,$udom,$uname,$namespace)
2269: =split(/:/,$userinput);
2270: $namespace=~s/\//\_/g;
2271: $namespace=~s/\W//g;
2272: my $qresult='';
2273: my $proname=propath($udom,$uname);
2274: my %hash;
2275: if (tie(%hash,'GDBM_File',
2276: "$proname/$namespace.db",
2277: &GDBM_READER(),0640)) {
2278: # Structure of %data:
2279: # $data{$symb}->{$parameter}=$value;
2280: # $data{$symb}->{'v.'.$parameter}=$version;
2281: # since $parameter will be unescaped, we do not
2282: # have to worry about silly parameter names...
2283: my %data = ();
2284: while (my ($key,$value) = each(%hash)) {
2285: my ($v,$symb,$param) = split(/:/,$key);
2286: next if ($v eq 'version' || $symb eq 'keys');
2287: next if (exists($data{$symb}) &&
2288: exists($data{$symb}->{$param}) &&
2289: $data{$symb}->{'v.'.$param} > $v);
2290: $data{$symb}->{$param}=$value;
2291: $data{$symb}->{'v.'.$param}=$v;
2292: }
2293: if (untie(%hash)) {
2294: while (my ($symb,$param_hash) = each(%data)) {
2295: while(my ($param,$value) = each (%$param_hash)){
2296: next if ($param =~ /^v\./);
2297: $qresult.=$symb.':'.$param.'='.$value.'&';
2298: }
2299: }
2300: chop($qresult);
2301: print $client "$qresult\n";
2302: } else {
2303: print $client "error: ".($!+0)
2304: ." untie(GDBM) Failed ".
2305: "while attempting currentdump\n";
2306: }
2307: } else {
2308: print $client "error: ".($!+0)
2309: ." tie(GDBM) Failed ".
2310: "while attempting currentdump\n";
2311: }
2312: } else {
2313: Reply($client, "refused\n", $userinput);
2314: }
2315: # ------------------------------------------------------------------------ dump
2316: } elsif ($userinput =~ /^dump/) {
2317: if(isClient) {
2318: my ($cmd,$udom,$uname,$namespace,$regexp)
2319: =split(/:/,$userinput);
2320: $namespace=~s/\//\_/g;
2321: $namespace=~s/\W//g;
2322: if (defined($regexp)) {
2323: $regexp=&unescape($regexp);
2324: } else {
2325: $regexp='.';
2326: }
2327: my $qresult='';
2328: my $proname=propath($udom,$uname);
2329: my %hash;
2330: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2331: study($regexp);
2332: while (my ($key,$value) = each(%hash)) {
2333: if ($regexp eq '.') {
2334: $qresult.=$key.'='.$value.'&';
2335: } else {
2336: my $unescapeKey = &unescape($key);
2337: if (eval('$unescapeKey=~/$regexp/')) {
2338: $qresult.="$key=$value&";
2339: }
2340: }
2341: }
2342: if (untie(%hash)) {
2343: chop($qresult);
2344: print $client "$qresult\n";
2345: } else {
2346: print $client "error: ".($!+0)
2347: ." untie(GDBM) Failed ".
2348: "while attempting dump\n";
2349: }
2350: } else {
2351: print $client "error: ".($!+0)
2352: ." tie(GDBM) Failed ".
2353: "while attempting dump\n";
2354: }
2355: } else {
2356: Reply($client, "refused\n", $userinput);
2357:
2358: }
2359: # ----------------------------------------------------------------------- store
2360: } elsif ($userinput =~ /^store/) {
2361: if(isClient) {
2362: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2363: =split(/:/,$userinput);
2364: $namespace=~s/\//\_/g;
2365: $namespace=~s/\W//g;
2366: if ($namespace ne 'roles') {
2367: chomp($what);
2368: my $proname=propath($udom,$uname);
2369: my $now=time;
2370: unless ($namespace=~/^nohist\_/) {
2371: my $hfh;
2372: if (
2373: $hfh=IO::File->new(">>$proname/$namespace.hist")
2374: ) { print $hfh "P:$now:$rid:$what\n"; }
2375: }
2376: my @pairs=split(/\&/,$what);
2377: my %hash;
2378: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2379: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2380: my $key;
2381: $hash{"version:$rid"}++;
2382: my $version=$hash{"version:$rid"};
2383: my $allkeys='';
2384: foreach my $pair (@pairs) {
2385: my ($key,$value)=split(/=/,$pair);
2386: $allkeys.=$key.':';
2387: $hash{"$version:$rid:$key"}=$value;
2388: }
2389: $hash{"$version:$rid:timestamp"}=$now;
2390: $allkeys.='timestamp';
2391: $hash{"$version:keys:$rid"}=$allkeys;
2392: if (untie(%hash)) {
2393: print $client "ok\n";
2394: } else {
2395: print $client "error: ".($!+0)
2396: ." untie(GDBM) Failed ".
2397: "while attempting store\n";
2398: }
2399: } else {
2400: print $client "error: ".($!+0)
2401: ." tie(GDBM) Failed ".
2402: "while attempting store\n";
2403: }
2404: } else {
2405: print $client "refused\n";
2406: }
2407: } else {
2408: Reply($client, "refused\n", $userinput);
2409:
2410: }
2411: # --------------------------------------------------------------------- restore
2412: } elsif ($userinput =~ /^restore/) {
2413: if(isClient) {
2414: my ($cmd,$udom,$uname,$namespace,$rid)
2415: =split(/:/,$userinput);
2416: $namespace=~s/\//\_/g;
2417: $namespace=~s/\W//g;
2418: chomp($rid);
2419: my $proname=propath($udom,$uname);
2420: my $qresult='';
2421: my %hash;
2422: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2423: my $version=$hash{"version:$rid"};
2424: $qresult.="version=$version&";
2425: my $scope;
2426: for ($scope=1;$scope<=$version;$scope++) {
2427: my $vkeys=$hash{"$scope:keys:$rid"};
2428: my @keys=split(/:/,$vkeys);
2429: my $key;
2430: $qresult.="$scope:keys=$vkeys&";
2431: foreach $key (@keys) {
2432: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2433: }
2434: }
2435: if (untie(%hash)) {
2436: $qresult=~s/\&$//;
2437: print $client "$qresult\n";
2438: } else {
2439: print $client "error: ".($!+0)
2440: ." untie(GDBM) Failed ".
2441: "while attempting restore\n";
2442: }
2443: } else {
2444: print $client "error: ".($!+0)
2445: ." tie(GDBM) Failed ".
2446: "while attempting restore\n";
2447: }
2448: } else {
2449: Reply($client, "refused\n", $userinput);
2450:
2451: }
2452: # -------------------------------------------------------------------- chatsend
2453: } elsif ($userinput =~ /^chatsend/) {
2454: if(isClient) {
2455: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2456: &chatadd($cdom,$cnum,$newpost);
2457: print $client "ok\n";
2458: } else {
2459: Reply($client, "refused\n", $userinput);
2460:
2461: }
2462: # -------------------------------------------------------------------- chatretr
2463: } elsif ($userinput =~ /^chatretr/) {
2464: if(isClient) {
2465: my
2466: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2467: my $reply='';
2468: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2469: $reply.=&escape($_).':';
2470: }
2471: $reply=~s/\:$//;
2472: print $client $reply."\n";
2473: } else {
2474: Reply($client, "refused\n", $userinput);
2475:
2476: }
2477: # ------------------------------------------------------------------- querysend
2478: } elsif ($userinput =~ /^querysend/) {
2479: if(isClient) {
2480: my ($cmd,$query,
2481: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2482: $query=~s/\n*$//g;
2483: print $client "".
2484: sqlreply("$clientname\&$query".
2485: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2486: } else {
2487: Reply($client, "refused\n", $userinput);
2488:
2489: }
2490: # ------------------------------------------------------------------ queryreply
2491: } elsif ($userinput =~ /^queryreply/) {
2492: if(isClient) {
2493: my ($cmd,$id,$reply)=split(/:/,$userinput);
2494: my $store;
2495: my $execdir=$perlvar{'lonDaemons'};
2496: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2497: $reply=~s/\&/\n/g;
2498: print $store $reply;
2499: close $store;
2500: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2501: print $store2 "done\n";
2502: close $store2;
2503: print $client "ok\n";
2504: }
2505: else {
2506: print $client "error: ".($!+0)
2507: ." IO::File->new Failed ".
2508: "while attempting queryreply\n";
2509: }
2510: } else {
2511: Reply($client, "refused\n", $userinput);
2512:
2513: }
2514: # ----------------------------------------------------------------- courseidput
2515: } elsif ($userinput =~ /^courseidput/) {
2516: if(isClient) {
2517: my ($cmd,$udom,$what)=split(/:/,$userinput);
2518: chomp($what);
2519: $udom=~s/\W//g;
2520: my $proname=
2521: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2522: my $now=time;
2523: my @pairs=split(/\&/,$what);
2524: my %hash;
2525: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2526: foreach my $pair (@pairs) {
2527: my ($key,$value)=split(/=/,$pair);
2528: $hash{$key}=$value.':'.$now;
2529: }
2530: if (untie(%hash)) {
2531: print $client "ok\n";
2532: } else {
2533: print $client "error: ".($!+0)
2534: ." untie(GDBM) Failed ".
2535: "while attempting courseidput\n";
2536: }
2537: } else {
2538: print $client "error: ".($!+0)
2539: ." tie(GDBM) Failed ".
2540: "while attempting courseidput\n";
2541: }
2542: } else {
2543: Reply($client, "refused\n", $userinput);
2544:
2545: }
2546: # ---------------------------------------------------------------- courseiddump
2547: } elsif ($userinput =~ /^courseiddump/) {
2548: if(isClient) {
2549: my ($cmd,$udom,$since,$description)
2550: =split(/:/,$userinput);
2551: if (defined($description)) {
2552: $description=&unescape($description);
2553: } else {
2554: $description='.';
2555: }
2556: unless (defined($since)) { $since=0; }
2557: my $qresult='';
2558: my $proname=
2559: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2560: my %hash;
2561: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2562: while (my ($key,$value) = each(%hash)) {
2563: my ($descr,$lasttime)=split(/\:/,$value);
2564: if ($lasttime<$since) { next; }
2565: if ($description eq '.') {
2566: $qresult.=$key.'='.$descr.'&';
2567: } else {
2568: my $unescapeVal = &unescape($descr);
2569: if (eval('$unescapeVal=~/$description/i')) {
2570: $qresult.="$key=$descr&";
2571: }
2572: }
2573: }
2574: if (untie(%hash)) {
2575: chop($qresult);
2576: print $client "$qresult\n";
2577: } else {
2578: print $client "error: ".($!+0)
2579: ." untie(GDBM) Failed ".
2580: "while attempting courseiddump\n";
2581: }
2582: } else {
2583: print $client "error: ".($!+0)
2584: ." tie(GDBM) Failed ".
2585: "while attempting courseiddump\n";
2586: }
2587: } else {
2588: Reply($client, "refused\n", $userinput);
2589:
2590: }
2591: # ----------------------------------------------------------------------- idput
2592: } elsif ($userinput =~ /^idput/) {
2593: if(isClient) {
2594: my ($cmd,$udom,$what)=split(/:/,$userinput);
2595: chomp($what);
2596: $udom=~s/\W//g;
2597: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2598: my $now=time;
2599: {
2600: my $hfh;
2601: if (
2602: $hfh=IO::File->new(">>$proname.hist")
2603: ) { print $hfh "P:$now:$what\n"; }
2604: }
2605: my @pairs=split(/\&/,$what);
2606: my %hash;
2607: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2608: foreach my $pair (@pairs) {
2609: my ($key,$value)=split(/=/,$pair);
2610: $hash{$key}=$value;
2611: }
2612: if (untie(%hash)) {
2613: print $client "ok\n";
2614: } else {
2615: print $client "error: ".($!+0)
2616: ." untie(GDBM) Failed ".
2617: "while attempting idput\n";
2618: }
2619: } else {
2620: print $client "error: ".($!+0)
2621: ." tie(GDBM) Failed ".
2622: "while attempting idput\n";
2623: }
2624: } else {
2625: Reply($client, "refused\n", $userinput);
2626:
2627: }
2628: # ----------------------------------------------------------------------- idget
2629: } elsif ($userinput =~ /^idget/) {
2630: if(isClient) {
2631: my ($cmd,$udom,$what)=split(/:/,$userinput);
2632: chomp($what);
2633: $udom=~s/\W//g;
2634: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2635: my @queries=split(/\&/,$what);
2636: my $qresult='';
2637: my %hash;
2638: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2639: for (my $i=0;$i<=$#queries;$i++) {
2640: $qresult.="$hash{$queries[$i]}&";
2641: }
2642: if (untie(%hash)) {
2643: $qresult=~s/\&$//;
2644: print $client "$qresult\n";
2645: } else {
2646: print $client "error: ".($!+0)
2647: ." untie(GDBM) Failed ".
2648: "while attempting idget\n";
2649: }
2650: } else {
2651: print $client "error: ".($!+0)
2652: ." tie(GDBM) Failed ".
2653: "while attempting idget\n";
2654: }
2655: } else {
2656: Reply($client, "refused\n", $userinput);
2657:
2658: }
2659: # ---------------------------------------------------------------------- tmpput
2660: } elsif ($userinput =~ /^tmpput/) {
2661: if(isClient) {
2662: my ($cmd,$what)=split(/:/,$userinput);
2663: my $store;
2664: $tmpsnum++;
2665: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2666: $id=~s/\W/\_/g;
2667: $what=~s/\n//g;
2668: my $execdir=$perlvar{'lonDaemons'};
2669: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2670: print $store $what;
2671: close $store;
2672: print $client "$id\n";
2673: }
2674: else {
2675: print $client "error: ".($!+0)
2676: ."IO::File->new Failed ".
2677: "while attempting tmpput\n";
2678: }
2679: } else {
2680: Reply($client, "refused\n", $userinput);
2681:
2682: }
2683:
2684: # ---------------------------------------------------------------------- tmpget
2685: } elsif ($userinput =~ /^tmpget/) {
2686: if(isClient) {
2687: my ($cmd,$id)=split(/:/,$userinput);
2688: chomp($id);
2689: $id=~s/\W/\_/g;
2690: my $store;
2691: my $execdir=$perlvar{'lonDaemons'};
2692: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2693: my $reply=<$store>;
2694: print $client "$reply\n";
2695: close $store;
2696: }
2697: else {
2698: print $client "error: ".($!+0)
2699: ."IO::File->new Failed ".
2700: "while attempting tmpget\n";
2701: }
2702: } else {
2703: Reply($client, "refused\n", $userinput);
2704:
2705: }
2706: # ---------------------------------------------------------------------- tmpdel
2707: } elsif ($userinput =~ /^tmpdel/) {
2708: if(isClient) {
2709: my ($cmd,$id)=split(/:/,$userinput);
2710: chomp($id);
2711: $id=~s/\W/\_/g;
2712: my $execdir=$perlvar{'lonDaemons'};
2713: if (unlink("$execdir/tmp/$id.tmp")) {
2714: print $client "ok\n";
2715: } else {
2716: print $client "error: ".($!+0)
2717: ."Unlink tmp Failed ".
2718: "while attempting tmpdel\n";
2719: }
2720: } else {
2721: Reply($client, "refused\n", $userinput);
2722:
2723: }
2724: # -------------------------------------------------------------------------- ls
2725: } elsif ($userinput =~ /^ls/) {
2726: if(isClient) {
2727: my $obs;
2728: my $rights;
2729: my ($cmd,$ulsdir)=split(/:/,$userinput);
2730: my $ulsout='';
2731: my $ulsfn;
2732: if (-e $ulsdir) {
2733: if(-d $ulsdir) {
2734: if (opendir(LSDIR,$ulsdir)) {
2735: while ($ulsfn=readdir(LSDIR)) {
2736: undef $obs, $rights;
2737: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2738: #We do some obsolete checking here
2739: if(-e $ulsdir.'/'.$ulsfn.".meta") {
2740: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
2741: my @obsolete=<FILE>;
2742: foreach my $obsolete (@obsolete) {
2743: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
2744: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
2745: }
2746: }
2747: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
2748: if($obs eq '1') { $ulsout.="&1"; }
2749: else { $ulsout.="&0"; }
2750: if($rights eq '1') { $ulsout.="&1:"; }
2751: else { $ulsout.="&0:"; }
2752: }
2753: closedir(LSDIR);
2754: }
2755: } else {
2756: my @ulsstats=stat($ulsdir);
2757: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2758: }
2759: } else {
2760: $ulsout='no_such_dir';
2761: }
2762: if ($ulsout eq '') { $ulsout='empty'; }
2763: print $client "$ulsout\n";
2764: } else {
2765: Reply($client, "refused\n", $userinput);
2766:
2767: }
2768: # ----------------------------------------------------------------- setannounce
2769: } elsif ($userinput =~ /^setannounce/) {
2770: if (isClient) {
2771: my ($cmd,$announcement)=split(/:/,$userinput);
2772: chomp($announcement);
2773: $announcement=&unescape($announcement);
2774: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2775: '/announcement.txt')) {
2776: print $store $announcement;
2777: close $store;
2778: print $client "ok\n";
2779: } else {
2780: print $client "error: ".($!+0)."\n";
2781: }
2782: } else {
2783: Reply($client, "refused\n", $userinput);
2784:
2785: }
2786: # ------------------------------------------------------------------ Hanging up
2787: } elsif (($userinput =~ /^exit/) ||
2788: ($userinput =~ /^init/)) { # no restrictions.
2789: &logthis(
2790: "Client $clientip ($clientname) hanging up: $userinput");
2791: print $client "bye\n";
2792: $client->shutdown(2); # shutdown the socket forcibly.
2793: $client->close();
2794: last;
2795:
2796: # ---------------------------------- set current host/domain
2797: } elsif ($userinput =~ /^sethost:/) {
2798: if (isClient) {
2799: print $client &sethost($userinput)."\n";
2800: } else {
2801: print $client "refused\n";
2802: }
2803: #---------------------------------- request file (?) version.
2804: } elsif ($userinput =~/^version:/) {
2805: if (isClient) {
2806: print $client &version($userinput)."\n";
2807: } else {
2808: print $client "refused\n";
2809: }
2810: # ------------------------------------------------------------- unknown command
2811:
2812: } else {
2813: # unknown command
2814: print $client "unknown_cmd\n";
2815: }
2816: # -------------------------------------------------------------------- complete
2817: alarm(0);
2818: &status('Listening to '.$clientname);
2819: }
2820: # --------------------------------------------- client unknown or fishy, refuse
2821: } else {
2822: print $client "refused\n";
2823: $client->close();
2824: &logthis("<font color=blue>WARNING: "
2825: ."Rejected client $clientip, closing connection</font>");
2826: }
2827: }
2828:
2829: # =============================================================================
2830:
2831: &logthis("<font color=red>CRITICAL: "
2832: ."Disconnect from $clientip ($clientname)</font>");
2833:
2834:
2835: # this exit is VERY important, otherwise the child will become
2836: # a producer of more and more children, forking yourself into
2837: # process death.
2838: exit;
2839:
2840: }
2841:
2842:
2843: #
2844: # Checks to see if the input roleput request was to set
2845: # an author role. If so, invokes the lchtmldir script to set
2846: # up a correct public_html
2847: # Parameters:
2848: # request - The request sent to the rolesput subchunk.
2849: # We're looking for /domain/_au
2850: # domain - The domain in which the user is having roles doctored.
2851: # user - Name of the user for which the role is being put.
2852: # authtype - The authentication type associated with the user.
2853: #
2854: sub ManagePermissions
2855: {
2856: my $request = shift;
2857: my $domain = shift;
2858: my $user = shift;
2859: my $authtype= shift;
2860:
2861: # See if the request is of the form /$domain/_au
2862: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
2863: my $execdir = $perlvar{'lonDaemons'};
2864: my $userhome= "/home/$user" ;
2865: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
2866: system("$execdir/lchtmldir $userhome $user $authtype");
2867: }
2868: }
2869: #
2870: # GetAuthType - Determines the authorization type of a user in a domain.
2871:
2872: # Returns the authorization type or nouser if there is no such user.
2873: #
2874: sub GetAuthType
2875: {
2876: my $domain = shift;
2877: my $user = shift;
2878:
2879: Debug("GetAuthType( $domain, $user ) \n");
2880: my $proname = &propath($domain, $user);
2881: my $passwdfile = "$proname/passwd";
2882: if( -e $passwdfile ) {
2883: my $pf = IO::File->new($passwdfile);
2884: my $realpassword = <$pf>;
2885: chomp($realpassword);
2886: Debug("Password info = $realpassword\n");
2887: my ($authtype, $contentpwd) = split(/:/, $realpassword);
2888: Debug("Authtype = $authtype, content = $contentpwd\n");
2889: my $availinfo = '';
2890: if($authtype eq 'krb4' or $authtype eq 'krb5') {
2891: $availinfo = $contentpwd;
2892: }
2893:
2894: return "$authtype:$availinfo";
2895: }
2896: else {
2897: Debug("Returning nouser");
2898: return "nouser";
2899: }
2900: }
2901:
2902: sub addline {
2903: my ($fname,$hostid,$ip,$newline)=@_;
2904: my $contents;
2905: my $found=0;
2906: my $expr='^'.$hostid.':'.$ip.':';
2907: $expr =~ s/\./\\\./g;
2908: my $sh;
2909: if ($sh=IO::File->new("$fname.subscription")) {
2910: while (my $subline=<$sh>) {
2911: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
2912: }
2913: $sh->close();
2914: }
2915: $sh=IO::File->new(">$fname.subscription");
2916: if ($contents) { print $sh $contents; }
2917: if ($newline) { print $sh $newline; }
2918: $sh->close();
2919: return $found;
2920: }
2921:
2922: sub getchat {
2923: my ($cdom,$cname,$udom,$uname)=@_;
2924: my %hash;
2925: my $proname=&propath($cdom,$cname);
2926: my @entries=();
2927: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2928: &GDBM_READER(),0640)) {
2929: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2930: untie %hash;
2931: }
2932: my @participants=();
2933: my $cutoff=time-60;
2934: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
2935: &GDBM_WRCREAT(),0640)) {
2936: $hash{$uname.':'.$udom}=time;
2937: foreach (sort keys %hash) {
2938: if ($hash{$_}>$cutoff) {
2939: $participants[$#participants+1]='active_participant:'.$_;
2940: }
2941: }
2942: untie %hash;
2943: }
2944: return (@participants,@entries);
2945: }
2946:
2947: sub chatadd {
2948: my ($cdom,$cname,$newchat)=@_;
2949: my %hash;
2950: my $proname=&propath($cdom,$cname);
2951: my @entries=();
2952: my $time=time;
2953: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2954: &GDBM_WRCREAT(),0640)) {
2955: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2956: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
2957: my ($thentime,$idnum)=split(/\_/,$lastid);
2958: my $newid=$time.'_000000';
2959: if ($thentime==$time) {
2960: $idnum=~s/^0+//;
2961: $idnum++;
2962: $idnum=substr('000000'.$idnum,-6,6);
2963: $newid=$time.'_'.$idnum;
2964: }
2965: $hash{$newid}=$newchat;
2966: my $expired=$time-3600;
2967: foreach (keys %hash) {
2968: my ($thistime)=($_=~/(\d+)\_/);
2969: if ($thistime<$expired) {
2970: delete $hash{$_};
2971: }
2972: }
2973: untie %hash;
2974: }
2975: {
2976: my $hfh;
2977: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
2978: print $hfh "$time:".&unescape($newchat)."\n";
2979: }
2980: }
2981: }
2982:
2983: sub unsub {
2984: my ($fname,$clientip)=@_;
2985: my $result;
2986: if (unlink("$fname.$clientname")) {
2987: $result="ok\n";
2988: } else {
2989: $result="not_subscribed\n";
2990: }
2991: if (-e "$fname.subscription") {
2992: my $found=&addline($fname,$clientname,$clientip,'');
2993: if ($found) { $result="ok\n"; }
2994: } else {
2995: if ($result != "ok\n") { $result="not_subscribed\n"; }
2996: }
2997: return $result;
2998: }
2999:
3000: sub currentversion {
3001: my $fname=shift;
3002: my $version=-1;
3003: my $ulsdir='';
3004: if ($fname=~/^(.+)\/[^\/]+$/) {
3005: $ulsdir=$1;
3006: }
3007: my ($fnamere1,$fnamere2);
3008: # remove version if already specified
3009: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
3010: # get the bits that go before and after the version number
3011: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
3012: $fnamere1=$1;
3013: $fnamere2='.'.$2;
3014: }
3015: if (-e $fname) { $version=1; }
3016: if (-e $ulsdir) {
3017: if(-d $ulsdir) {
3018: if (opendir(LSDIR,$ulsdir)) {
3019: my $ulsfn;
3020: while ($ulsfn=readdir(LSDIR)) {
3021: # see if this is a regular file (ignore links produced earlier)
3022: my $thisfile=$ulsdir.'/'.$ulsfn;
3023: unless (-l $thisfile) {
3024: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
3025: if ($1>$version) { $version=$1; }
3026: }
3027: }
3028: }
3029: closedir(LSDIR);
3030: $version++;
3031: }
3032: }
3033: }
3034: return $version;
3035: }
3036:
3037: sub thisversion {
3038: my $fname=shift;
3039: my $version=-1;
3040: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
3041: $version=$1;
3042: }
3043: return $version;
3044: }
3045:
3046: sub subscribe {
3047: my ($userinput,$clientip)=@_;
3048: my $result;
3049: my ($cmd,$fname)=split(/:/,$userinput);
3050: my $ownership=&ishome($fname);
3051: if ($ownership eq 'owner') {
3052: # explitly asking for the current version?
3053: unless (-e $fname) {
3054: my $currentversion=¤tversion($fname);
3055: if (&thisversion($fname)==$currentversion) {
3056: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
3057: my $root=$1;
3058: my $extension=$2;
3059: symlink($root.'.'.$extension,
3060: $root.'.'.$currentversion.'.'.$extension);
3061: unless ($extension=~/\.meta$/) {
3062: symlink($root.'.'.$extension.'.meta',
3063: $root.'.'.$currentversion.'.'.$extension.'.meta');
3064: }
3065: }
3066: }
3067: }
3068: if (-e $fname) {
3069: if (-d $fname) {
3070: $result="directory\n";
3071: } else {
3072: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
3073: my $now=time;
3074: my $found=&addline($fname,$clientname,$clientip,
3075: "$clientname:$clientip:$now\n");
3076: if ($found) { $result="$fname\n"; }
3077: # if they were subscribed to only meta data, delete that
3078: # subscription, when you subscribe to a file you also get
3079: # the metadata
3080: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
3081: $fname=~s/\/home\/httpd\/html\/res/raw/;
3082: $fname="http://$thisserver/".$fname;
3083: $result="$fname\n";
3084: }
3085: } else {
3086: $result="not_found\n";
3087: }
3088: } else {
3089: $result="rejected\n";
3090: }
3091: return $result;
3092: }
3093:
3094: sub make_passwd_file {
3095: my ($uname, $umode,$npass,$passfilename)=@_;
3096: my $result="ok\n";
3097: if ($umode eq 'krb4' or $umode eq 'krb5') {
3098: {
3099: my $pf = IO::File->new(">$passfilename");
3100: print $pf "$umode:$npass\n";
3101: }
3102: } elsif ($umode eq 'internal') {
3103: my $salt=time;
3104: $salt=substr($salt,6,2);
3105: my $ncpass=crypt($npass,$salt);
3106: {
3107: &Debug("Creating internal auth");
3108: my $pf = IO::File->new(">$passfilename");
3109: print $pf "internal:$ncpass\n";
3110: }
3111: } elsif ($umode eq 'localauth') {
3112: {
3113: my $pf = IO::File->new(">$passfilename");
3114: print $pf "localauth:$npass\n";
3115: }
3116: } elsif ($umode eq 'unix') {
3117: {
3118: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
3119: {
3120: &Debug("Executing external: ".$execpath);
3121: &Debug("user = ".$uname.", Password =". $npass);
3122: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
3123: print $se "$uname\n";
3124: print $se "$npass\n";
3125: print $se "$npass\n";
3126: }
3127: my $useraddok = $?;
3128: if($useraddok > 0) {
3129: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
3130: }
3131: my $pf = IO::File->new(">$passfilename");
3132: print $pf "unix:\n";
3133: }
3134: } elsif ($umode eq 'none') {
3135: {
3136: my $pf = IO::File->new(">$passfilename");
3137: print $pf "none:\n";
3138: }
3139: } else {
3140: $result="auth_mode_error\n";
3141: }
3142: return $result;
3143: }
3144:
3145: sub sethost {
3146: my ($remotereq) = @_;
3147: my (undef,$hostid)=split(/:/,$remotereq);
3148: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
3149: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
3150: $currenthostid=$hostid;
3151: $currentdomainid=$hostdom{$hostid};
3152: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
3153: } else {
3154: &logthis("Requested host id $hostid not an alias of ".
3155: $perlvar{'lonHostID'}." refusing connection");
3156: return 'unable_to_set';
3157: }
3158: return 'ok';
3159: }
3160:
3161: sub version {
3162: my ($userinput)=@_;
3163: $remoteVERSION=(split(/:/,$userinput))[1];
3164: return "version:$VERSION";
3165: }
3166:
3167: #There is a copy of this in lonnet.pm
3168: sub userload {
3169: my $numusers=0;
3170: {
3171: opendir(LONIDS,$perlvar{'lonIDsDir'});
3172: my $filename;
3173: my $curtime=time;
3174: while ($filename=readdir(LONIDS)) {
3175: if ($filename eq '.' || $filename eq '..') {next;}
3176: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
3177: if ($curtime-$mtime < 1800) { $numusers++; }
3178: }
3179: closedir(LONIDS);
3180: }
3181: my $userloadpercent=0;
3182: my $maxuserload=$perlvar{'lonUserLoadLim'};
3183: if ($maxuserload) {
3184: $userloadpercent=100*$numusers/$maxuserload;
3185: }
3186: $userloadpercent=sprintf("%.2f",$userloadpercent);
3187: return $userloadpercent;
3188: }
3189:
3190: # ----------------------------------- POD (plain old documentation, CPAN style)
3191:
3192: =head1 NAME
3193:
3194: lond - "LON Daemon" Server (port "LOND" 5663)
3195:
3196: =head1 SYNOPSIS
3197:
3198: Usage: B<lond>
3199:
3200: Should only be run as user=www. This is a command-line script which
3201: is invoked by B<loncron>. There is no expectation that a typical user
3202: will manually start B<lond> from the command-line. (In other words,
3203: DO NOT START B<lond> YOURSELF.)
3204:
3205: =head1 DESCRIPTION
3206:
3207: There are two characteristics associated with the running of B<lond>,
3208: PROCESS MANAGEMENT (starting, stopping, handling child processes)
3209: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
3210: subscriptions, etc). These are described in two large
3211: sections below.
3212:
3213: B<PROCESS MANAGEMENT>
3214:
3215: Preforker - server who forks first. Runs as a daemon. HUPs.
3216: Uses IDEA encryption
3217:
3218: B<lond> forks off children processes that correspond to the other servers
3219: in the network. Management of these processes can be done at the
3220: parent process level or the child process level.
3221:
3222: B<logs/lond.log> is the location of log messages.
3223:
3224: The process management is now explained in terms of linux shell commands,
3225: subroutines internal to this code, and signal assignments:
3226:
3227: =over 4
3228:
3229: =item *
3230:
3231: PID is stored in B<logs/lond.pid>
3232:
3233: This is the process id number of the parent B<lond> process.
3234:
3235: =item *
3236:
3237: SIGTERM and SIGINT
3238:
3239: Parent signal assignment:
3240: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3241:
3242: Child signal assignment:
3243: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
3244: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
3245: to restart a new child.)
3246:
3247: Command-line invocations:
3248: B<kill> B<-s> SIGTERM I<PID>
3249: B<kill> B<-s> SIGINT I<PID>
3250:
3251: Subroutine B<HUNTSMAN>:
3252: This is only invoked for the B<lond> parent I<PID>.
3253: This kills all the children, and then the parent.
3254: The B<lonc.pid> file is cleared.
3255:
3256: =item *
3257:
3258: SIGHUP
3259:
3260: Current bug:
3261: This signal can only be processed the first time
3262: on the parent process. Subsequent SIGHUP signals
3263: have no effect.
3264:
3265: Parent signal assignment:
3266: $SIG{HUP} = \&HUPSMAN;
3267:
3268: Child signal assignment:
3269: none (nothing happens)
3270:
3271: Command-line invocations:
3272: B<kill> B<-s> SIGHUP I<PID>
3273:
3274: Subroutine B<HUPSMAN>:
3275: This is only invoked for the B<lond> parent I<PID>,
3276: This kills all the children, and then the parent.
3277: The B<lond.pid> file is cleared.
3278:
3279: =item *
3280:
3281: SIGUSR1
3282:
3283: Parent signal assignment:
3284: $SIG{USR1} = \&USRMAN;
3285:
3286: Child signal assignment:
3287: $SIG{USR1}= \&logstatus;
3288:
3289: Command-line invocations:
3290: B<kill> B<-s> SIGUSR1 I<PID>
3291:
3292: Subroutine B<USRMAN>:
3293: When invoked for the B<lond> parent I<PID>,
3294: SIGUSR1 is sent to all the children, and the status of
3295: each connection is logged.
3296:
3297: =item *
3298:
3299: SIGUSR2
3300:
3301: Parent Signal assignment:
3302: $SIG{USR2} = \&UpdateHosts
3303:
3304: Child signal assignment:
3305: NONE
3306:
3307:
3308: =item *
3309:
3310: SIGCHLD
3311:
3312: Parent signal assignment:
3313: $SIG{CHLD} = \&REAPER;
3314:
3315: Child signal assignment:
3316: none
3317:
3318: Command-line invocations:
3319: B<kill> B<-s> SIGCHLD I<PID>
3320:
3321: Subroutine B<REAPER>:
3322: This is only invoked for the B<lond> parent I<PID>.
3323: Information pertaining to the child is removed.
3324: The socket port is cleaned up.
3325:
3326: =back
3327:
3328: B<SERVER-SIDE ACTIVITIES>
3329:
3330: Server-side information can be accepted in an encrypted or non-encrypted
3331: method.
3332:
3333: =over 4
3334:
3335: =item ping
3336:
3337: Query a client in the hosts.tab table; "Are you there?"
3338:
3339: =item pong
3340:
3341: Respond to a ping query.
3342:
3343: =item ekey
3344:
3345: Read in encrypted key, make cipher. Respond with a buildkey.
3346:
3347: =item load
3348:
3349: Respond with CPU load based on a computation upon /proc/loadavg.
3350:
3351: =item currentauth
3352:
3353: Reply with current authentication information (only over an
3354: encrypted channel).
3355:
3356: =item auth
3357:
3358: Only over an encrypted channel, reply as to whether a user's
3359: authentication information can be validated.
3360:
3361: =item passwd
3362:
3363: Allow for a password to be set.
3364:
3365: =item makeuser
3366:
3367: Make a user.
3368:
3369: =item passwd
3370:
3371: Allow for authentication mechanism and password to be changed.
3372:
3373: =item home
3374:
3375: Respond to a question "are you the home for a given user?"
3376:
3377: =item update
3378:
3379: Update contents of a subscribed resource.
3380:
3381: =item unsubscribe
3382:
3383: The server is unsubscribing from a resource.
3384:
3385: =item subscribe
3386:
3387: The server is subscribing to a resource.
3388:
3389: =item log
3390:
3391: Place in B<logs/lond.log>
3392:
3393: =item put
3394:
3395: stores hash in namespace
3396:
3397: =item rolesput
3398:
3399: put a role into a user's environment
3400:
3401: =item get
3402:
3403: returns hash with keys from array
3404: reference filled in from namespace
3405:
3406: =item eget
3407:
3408: returns hash with keys from array
3409: reference filled in from namesp (encrypts the return communication)
3410:
3411: =item rolesget
3412:
3413: get a role from a user's environment
3414:
3415: =item del
3416:
3417: deletes keys out of array from namespace
3418:
3419: =item keys
3420:
3421: returns namespace keys
3422:
3423: =item dump
3424:
3425: dumps the complete (or key matching regexp) namespace into a hash
3426:
3427: =item store
3428:
3429: stores hash permanently
3430: for this url; hashref needs to be given and should be a \%hashname; the
3431: remaining args aren't required and if they aren't passed or are '' they will
3432: be derived from the ENV
3433:
3434: =item restore
3435:
3436: returns a hash for a given url
3437:
3438: =item querysend
3439:
3440: Tells client about the lonsql process that has been launched in response
3441: to a sent query.
3442:
3443: =item queryreply
3444:
3445: Accept information from lonsql and make appropriate storage in temporary
3446: file space.
3447:
3448: =item idput
3449:
3450: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
3451: for each student, defined perhaps by the institutional Registrar.)
3452:
3453: =item idget
3454:
3455: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
3456: for each student, defined perhaps by the institutional Registrar.)
3457:
3458: =item tmpput
3459:
3460: Accept and store information in temporary space.
3461:
3462: =item tmpget
3463:
3464: Send along temporarily stored information.
3465:
3466: =item ls
3467:
3468: List part of a user's directory.
3469:
3470: =item pushtable
3471:
3472: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
3473: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
3474: must be restored manually in case of a problem with the new table file.
3475: pushtable requires that the request be encrypted and validated via
3476: ValidateManager. The form of the command is:
3477: enc:pushtable tablename <tablecontents> \n
3478: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
3479: cleartext newline.
3480:
3481: =item Hanging up (exit or init)
3482:
3483: What to do when a client tells the server that they (the client)
3484: are leaving the network.
3485:
3486: =item unknown command
3487:
3488: If B<lond> is sent an unknown command (not in the list above),
3489: it replys to the client "unknown_cmd".
3490:
3491:
3492: =item UNKNOWN CLIENT
3493:
3494: If the anti-spoofing algorithm cannot verify the client,
3495: the client is rejected (with a "refused" message sent
3496: to the client, and the connection is closed.
3497:
3498: =back
3499:
3500: =head1 PREREQUISITES
3501:
3502: IO::Socket
3503: IO::File
3504: Apache::File
3505: Symbol
3506: POSIX
3507: Crypt::IDEA
3508: LWP::UserAgent()
3509: GDBM_File
3510: Authen::Krb4
3511: Authen::Krb5
3512:
3513: =head1 COREQUISITES
3514:
3515: =head1 OSNAMES
3516:
3517: linux
3518:
3519: =head1 SCRIPT CATEGORIES
3520:
3521: Server/Process
3522:
3523: =cut
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