File:
[LON-CAPA] /
loncom /
lond
Revision
1.193:
download - view:
text,
annotated -
select for diffs
Tue Jun 8 22:09:44 2004 UTC (19 years, 10 months ago) by
raeburn
Branches:
MAIN
CVS tags:
HEAD
Changes to support autoenroll calls from a remote server.
lond on the homeserver for the course(s) handles requests from the remote
server for institutional data (e.g., classlists, valid institutional courseIDs,
institutional section numbers for a course code, validation of course owners), by
calling the appropriate functions in the homeserver's localenroll.pm
All replies are made directly with the exception of fetch_enrollment_query, which
is shipped over to lonsql, in case retrieval of institutional classlists is a
protracted process.
lonsql on the homeserver for the course(s) calls localenroll::fetch_enrollment()
and writes XML files of enrollment data to /home/httpd/perl/tmp
Transfer of classlist data occurs later following an autoretrieve call from the
remote server. It is planned to generalize this function and add encryption to the transfer back to the client.
Autoenroll.pl called by cron on a library server, now only carries out updates for
courses in its domain, for which the library server is the course's homeserver. If a domain has multiple library servers Autoenroll.pl will need to be run on each library server.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.193 2004/06/08 22:09:44 raeburn 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 localenroll;
49: use File::Copy;
50: use LONCAPA::ConfigFileEdit;
51:
52: my $DEBUG = 0; # Non zero to enable debug log entries.
53:
54: my $status='';
55: my $lastlog='';
56:
57: my $VERSION='$Revision: 1.193 $'; #' stupid emacs
58: my $remoteVERSION;
59: my $currenthostid;
60: my $currentdomainid;
61:
62: my $client;
63: my $clientip;
64: my $clientname;
65:
66: my $server;
67: my $thisserver;
68:
69: #
70: # Connection type is:
71: # client - All client actions are allowed
72: # manager - only management functions allowed.
73: # both - Both management and client actions are allowed
74: #
75:
76: my $ConnectionType;
77:
78: my %hostid;
79: my %hostdom;
80: my %hostip;
81:
82: my %managers; # Ip -> manager names
83:
84: my %perlvar; # Will have the apache conf defined perl vars.
85:
86: #
87: # The array below are password error strings."
88: #
89: my $lastpwderror = 13; # Largest error number from lcpasswd.
90: my @passwderrors = ("ok",
91: "lcpasswd must be run as user 'www'",
92: "lcpasswd got incorrect number of arguments",
93: "lcpasswd did not get the right nubmer of input text lines",
94: "lcpasswd too many simultaneous pwd changes in progress",
95: "lcpasswd User does not exist.",
96: "lcpasswd Incorrect current passwd",
97: "lcpasswd Unable to su to root.",
98: "lcpasswd Cannot set new passwd.",
99: "lcpasswd Username has invalid characters",
100: "lcpasswd Invalid characters in password",
101: "11", "12",
102: "lcpasswd Password mismatch");
103:
104:
105: # The array below are lcuseradd error strings.:
106:
107: my $lastadderror = 13;
108: my @adderrors = ("ok",
109: "User ID mismatch, lcuseradd must run as user www",
110: "lcuseradd Incorrect number of command line parameters must be 3",
111: "lcuseradd Incorrect number of stdinput lines, must be 3",
112: "lcuseradd Too many other simultaneous pwd changes in progress",
113: "lcuseradd User does not exist",
114: "lcuseradd Unable to make www member of users's group",
115: "lcuseradd Unable to su to root",
116: "lcuseradd Unable to set password",
117: "lcuseradd Usrname has invalid characters",
118: "lcuseradd Password has an invalid character",
119: "lcuseradd User already exists",
120: "lcuseradd Could not add user.",
121: "lcuseradd Password mismatch");
122:
123:
124: #
125: # GetCertificate: Given a transaction that requires a certificate,
126: # this function will extract the certificate from the transaction
127: # request. Note that at this point, the only concept of a certificate
128: # is the hostname to which we are connected.
129: #
130: # Parameter:
131: # request - The request sent by our client (this parameterization may
132: # need to change when we really use a certificate granting
133: # authority.
134: #
135: sub GetCertificate {
136: my $request = shift;
137:
138: return $clientip;
139: }
140:
141: #
142: # Return true if client is a manager.
143: #
144: sub isManager {
145: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
146: }
147: #
148: # Return tru if client can do client functions
149: #
150: sub isClient {
151: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
152: }
153:
154:
155: #
156: # ReadManagerTable: Reads in the current manager table. For now this is
157: # done on each manager authentication because:
158: # - These authentications are not frequent
159: # - This allows dynamic changes to the manager table
160: # without the need to signal to the lond.
161: #
162:
163: sub ReadManagerTable {
164:
165: # Clean out the old table first..
166:
167: foreach my $key (keys %managers) {
168: delete $managers{$key};
169: }
170:
171: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
172: if (!open (MANAGERS, $tablename)) {
173: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
174: return;
175: }
176: while(my $host = <MANAGERS>) {
177: chomp($host);
178: if ($host =~ "^#") { # Comment line.
179: logthis('<font color="green"> Skipping line: '. "$host</font>\n");
180: next;
181: }
182: if (!defined $hostip{$host}) { # This is a non cluster member
183: # The entry is of the form:
184: # cluname:hostname
185: # cluname - A 'cluster hostname' is needed in order to negotiate
186: # the host key.
187: # hostname- The dns name of the host.
188: #
189: my($cluname, $dnsname) = split(/:/, $host);
190:
191: my $ip = gethostbyname($dnsname);
192: if(defined($ip)) { # bad names don't deserve entry.
193: my $hostip = inet_ntoa($ip);
194: $managers{$hostip} = $cluname;
195: logthis('<font color="green"> registering manager '.
196: "$dnsname as $cluname with $hostip </font>\n");
197: }
198: } else {
199: logthis('<font color="green"> existing host'." $host</font>\n");
200: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
201: }
202: }
203: }
204:
205: #
206: # ValidManager: Determines if a given certificate represents a valid manager.
207: # in this primitive implementation, the 'certificate' is
208: # just the connecting loncapa client name. This is checked
209: # against a valid client list in the configuration.
210: #
211: #
212: sub ValidManager {
213: my $certificate = shift;
214:
215: return isManager;
216: }
217: #
218: # CopyFile: Called as part of the process of installing a
219: # new configuration file. This function copies an existing
220: # file to a backup file.
221: # Parameters:
222: # oldfile - Name of the file to backup.
223: # newfile - Name of the backup file.
224: # Return:
225: # 0 - Failure (errno has failure reason).
226: # 1 - Success.
227: #
228: sub CopyFile {
229:
230: my ($oldfile, $newfile) = @_;
231:
232: # The file must exist:
233:
234: if(-e $oldfile) {
235:
236: # Read the old file.
237:
238: my $oldfh = IO::File->new("< $oldfile");
239: if(!$oldfh) {
240: return 0;
241: }
242: my @contents = <$oldfh>; # Suck in the entire file.
243:
244: # write the backup file:
245:
246: my $newfh = IO::File->new("> $newfile");
247: if(!(defined $newfh)){
248: return 0;
249: }
250: my $lines = scalar @contents;
251: for (my $i =0; $i < $lines; $i++) {
252: print $newfh ($contents[$i]);
253: }
254:
255: $oldfh->close;
256: $newfh->close;
257:
258: chmod(0660, $newfile);
259:
260: return 1;
261:
262: } else {
263: return 0;
264: }
265: }
266: #
267: # Host files are passed out with externally visible host IPs.
268: # If, for example, we are behind a fire-wall or NAT host, our
269: # internally visible IP may be different than the externally
270: # visible IP. Therefore, we always adjust the contents of the
271: # host file so that the entry for ME is the IP that we believe
272: # we have. At present, this is defined as the entry that
273: # DNS has for us. If by some chance we are not able to get a
274: # DNS translation for us, then we assume that the host.tab file
275: # is correct.
276: # BUGBUGBUG - in the future, we really should see if we can
277: # easily query the interface(s) instead.
278: # Parameter(s):
279: # contents - The contents of the host.tab to check.
280: # Returns:
281: # newcontents - The adjusted contents.
282: #
283: #
284: sub AdjustHostContents {
285: my $contents = shift;
286: my $adjusted;
287: my $me = $perlvar{'lonHostID'};
288:
289: foreach my $line (split(/\n/,$contents)) {
290: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
291: chomp($line);
292: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
293: if ($id eq $me) {
294: my $ip = gethostbyname($name);
295: my $ipnew = inet_ntoa($ip);
296: $ip = $ipnew;
297: # Reconstruct the host line and append to adjusted:
298:
299: my $newline = "$id:$domain:$role:$name:$ip";
300: if($maxcon ne "") { # Not all hosts have loncnew tuning params
301: $newline .= ":$maxcon:$idleto:$mincon";
302: }
303: $adjusted .= $newline."\n";
304:
305: } else { # Not me, pass unmodified.
306: $adjusted .= $line."\n";
307: }
308: } else { # Blank or comment never re-written.
309: $adjusted .= $line."\n"; # Pass blanks and comments as is.
310: }
311: }
312: return $adjusted;
313: }
314: #
315: # InstallFile: Called to install an administrative file:
316: # - The file is created with <name>.tmp
317: # - The <name>.tmp file is then mv'd to <name>
318: # This lugubrious procedure is done to ensure that we are never without
319: # a valid, even if dated, version of the file regardless of who crashes
320: # and when the crash occurs.
321: #
322: # Parameters:
323: # Name of the file
324: # File Contents.
325: # Return:
326: # nonzero - success.
327: # 0 - failure and $! has an errno.
328: #
329: sub InstallFile {
330:
331: my ($Filename, $Contents) = @_;
332: my $TempFile = $Filename.".tmp";
333:
334: # Open the file for write:
335:
336: my $fh = IO::File->new("> $TempFile"); # Write to temp.
337: if(!(defined $fh)) {
338: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
339: return 0;
340: }
341: # write the contents of the file:
342:
343: print $fh ($Contents);
344: $fh->close; # In case we ever have a filesystem w. locking
345:
346: chmod(0660, $TempFile);
347:
348: # Now we can move install the file in position.
349:
350: move($TempFile, $Filename);
351:
352: return 1;
353: }
354: #
355: # ConfigFileFromSelector: converts a configuration file selector
356: # (one of host or domain at this point) into a
357: # configuration file pathname.
358: #
359: # Parameters:
360: # selector - Configuration file selector.
361: # Returns:
362: # Full path to the file or undef if the selector is invalid.
363: #
364: sub ConfigFileFromSelector {
365: my $selector = shift;
366: my $tablefile;
367:
368: my $tabledir = $perlvar{'lonTabDir'}.'/';
369: if ($selector eq "hosts") {
370: $tablefile = $tabledir."hosts.tab";
371: } elsif ($selector eq "domain") {
372: $tablefile = $tabledir."domain.tab";
373: } else {
374: return undef;
375: }
376: return $tablefile;
377:
378: }
379: #
380: # PushFile: Called to do an administrative push of a file.
381: # - Ensure the file being pushed is one we support.
382: # - Backup the old file to <filename.saved>
383: # - Separate the contents of the new file out from the
384: # rest of the request.
385: # - Write the new file.
386: # Parameter:
387: # Request - The entire user request. This consists of a : separated
388: # string pushfile:tablename:contents.
389: # NOTE: The contents may have :'s in it as well making things a bit
390: # more interesting... but not much.
391: # Returns:
392: # String to send to client ("ok" or "refused" if bad file).
393: #
394: sub PushFile {
395: my $request = shift;
396: my ($command, $filename, $contents) = split(":", $request, 3);
397:
398: # At this point in time, pushes for only the following tables are
399: # supported:
400: # hosts.tab ($filename eq host).
401: # domain.tab ($filename eq domain).
402: # Construct the destination filename or reject the request.
403: #
404: # lonManage is supposed to ensure this, however this session could be
405: # part of some elaborate spoof that managed somehow to authenticate.
406: #
407:
408:
409: my $tablefile = ConfigFileFromSelector($filename);
410: if(! (defined $tablefile)) {
411: return "refused";
412: }
413: #
414: # >copy< the old table to the backup table
415: # don't rename in case system crashes/reboots etc. in the time
416: # window between a rename and write.
417: #
418: my $backupfile = $tablefile;
419: $backupfile =~ s/\.tab$/.old/;
420: if(!CopyFile($tablefile, $backupfile)) {
421: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
422: return "error:$!";
423: }
424: &logthis('<font color="green"> Pushfile: backed up '
425: .$tablefile." to $backupfile</font>");
426:
427: # If the file being pushed is the host file, we adjust the entry for ourself so that the
428: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
429: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
430: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
431: # that possibilty.
432:
433: if($filename eq "host") {
434: $contents = AdjustHostContents($contents);
435: }
436:
437: # Install the new file:
438:
439: if(!InstallFile($tablefile, $contents)) {
440: &logthis('<font color="red"> Pushfile: unable to install '
441: .$tablefile." $! </font>");
442: return "error:$!";
443: }
444: else {
445: &logthis('<font color="green"> Installed new '.$tablefile
446: ."</font>");
447:
448: }
449:
450:
451: # Indicate success:
452:
453: return "ok";
454:
455: }
456:
457: #
458: # Called to re-init either lonc or lond.
459: #
460: # Parameters:
461: # request - The full request by the client. This is of the form
462: # reinit:<process>
463: # where <process> is allowed to be either of
464: # lonc or lond
465: #
466: # Returns:
467: # The string to be sent back to the client either:
468: # ok - Everything worked just fine.
469: # error:why - There was a failure and why describes the reason.
470: #
471: #
472: sub ReinitProcess {
473: my $request = shift;
474:
475:
476: # separate the request (reinit) from the process identifier and
477: # validate it producing the name of the .pid file for the process.
478: #
479: #
480: my ($junk, $process) = split(":", $request);
481: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
482: if($process eq 'lonc') {
483: $processpidfile = $processpidfile."lonc.pid";
484: if (!open(PIDFILE, "< $processpidfile")) {
485: return "error:Open failed for $processpidfile";
486: }
487: my $loncpid = <PIDFILE>;
488: close(PIDFILE);
489: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
490: ."</font>");
491: kill("USR2", $loncpid);
492: } elsif ($process eq 'lond') {
493: logthis('<font color="red"> Reinitializing self (lond) </font>');
494: &UpdateHosts; # Lond is us!!
495: } else {
496: &logthis('<font color="yellow" Invalid reinit request for '.$process
497: ."</font>");
498: return "error:Invalid process identifier $process";
499: }
500: return 'ok';
501: }
502: # Validate a line in a configuration file edit script:
503: # Validation includes:
504: # - Ensuring the command is valid.
505: # - Ensuring the command has sufficient parameters
506: # Parameters:
507: # scriptline - A line to validate (\n has been stripped for what it's worth).
508: #
509: # Return:
510: # 0 - Invalid scriptline.
511: # 1 - Valid scriptline
512: # NOTE:
513: # Only the command syntax is checked, not the executability of the
514: # command.
515: #
516: sub isValidEditCommand {
517: my $scriptline = shift;
518:
519: # Line elements are pipe separated:
520:
521: my ($command, $key, $newline) = split(/\|/, $scriptline);
522: &logthis('<font color="green"> isValideditCommand checking: '.
523: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
524:
525: if ($command eq "delete") {
526: #
527: # key with no newline.
528: #
529: if( ($key eq "") || ($newline ne "")) {
530: return 0; # Must have key but no newline.
531: } else {
532: return 1; # Valid syntax.
533: }
534: } elsif ($command eq "replace") {
535: #
536: # key and newline:
537: #
538: if (($key eq "") || ($newline eq "")) {
539: return 0;
540: } else {
541: return 1;
542: }
543: } elsif ($command eq "append") {
544: if (($key ne "") && ($newline eq "")) {
545: return 1;
546: } else {
547: return 0;
548: }
549: } else {
550: return 0; # Invalid command.
551: }
552: return 0; # Should not get here!!!
553: }
554: #
555: # ApplyEdit - Applies an edit command to a line in a configuration
556: # file. It is the caller's responsiblity to validate the
557: # edit line.
558: # Parameters:
559: # $directive - A single edit directive to apply.
560: # Edit directives are of the form:
561: # append|newline - Appends a new line to the file.
562: # replace|key|newline - Replaces the line with key value 'key'
563: # delete|key - Deletes the line with key value 'key'.
564: # $editor - A config file editor object that contains the
565: # file being edited.
566: #
567: sub ApplyEdit {
568:
569: my ($directive, $editor) = @_;
570:
571: # Break the directive down into its command and its parameters
572: # (at most two at this point. The meaning of the parameters, if in fact
573: # they exist depends on the command).
574:
575: my ($command, $p1, $p2) = split(/\|/, $directive);
576:
577: if($command eq "append") {
578: $editor->Append($p1); # p1 - key p2 null.
579: } elsif ($command eq "replace") {
580: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
581: } elsif ($command eq "delete") {
582: $editor->DeleteLine($p1); # p1 - key p2 null.
583: } else { # Should not get here!!!
584: die "Invalid command given to ApplyEdit $command"
585: }
586: }
587: #
588: # AdjustOurHost:
589: # Adjusts a host file stored in a configuration file editor object
590: # for the true IP address of this host. This is necessary for hosts
591: # that live behind a firewall.
592: # Those hosts have a publicly distributed IP of the firewall, but
593: # internally must use their actual IP. We assume that a given
594: # host only has a single IP interface for now.
595: # Formal Parameters:
596: # editor - The configuration file editor to adjust. This
597: # editor is assumed to contain a hosts.tab file.
598: # Strategy:
599: # - Figure out our hostname.
600: # - Lookup the entry for this host.
601: # - Modify the line to contain our IP
602: # - Do a replace for this host.
603: sub AdjustOurHost {
604: my $editor = shift;
605:
606: # figure out who I am.
607:
608: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
609:
610: # Get my host file entry.
611:
612: my $ConfigLine = $editor->Find($myHostName);
613: if(! (defined $ConfigLine)) {
614: die "AdjustOurHost - no entry for me in hosts file $myHostName";
615: }
616: # figure out my IP:
617: # Use the config line to get my hostname.
618: # Use gethostbyname to translate that into an IP address.
619: #
620: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
621: my $BinaryIp = gethostbyname($name);
622: my $ip = inet_ntoa($ip);
623: #
624: # Reassemble the config line from the elements in the list.
625: # Note that if the loncnew items were not present before, they will
626: # be now even if they would be empty
627: #
628: my $newConfigLine = $id;
629: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
630: $newConfigLine .= ":".$item;
631: }
632: # Replace the line:
633:
634: $editor->ReplaceLine($id, $newConfigLine);
635:
636: }
637: #
638: # ReplaceConfigFile:
639: # Replaces a configuration file with the contents of a
640: # configuration file editor object.
641: # This is done by:
642: # - Copying the target file to <filename>.old
643: # - Writing the new file to <filename>.tmp
644: # - Moving <filename.tmp> -> <filename>
645: # This laborious process ensures that the system is never without
646: # a configuration file that's at least valid (even if the contents
647: # may be dated).
648: # Parameters:
649: # filename - Name of the file to modify... this is a full path.
650: # editor - Editor containing the file.
651: #
652: sub ReplaceConfigFile {
653:
654: my ($filename, $editor) = @_;
655:
656: CopyFile ($filename, $filename.".old");
657:
658: my $contents = $editor->Get(); # Get the contents of the file.
659:
660: InstallFile($filename, $contents);
661: }
662: #
663: #
664: # Called to edit a configuration table file
665: # Parameters:
666: # request - The entire command/request sent by lonc or lonManage
667: # Return:
668: # The reply to send to the client.
669: #
670: sub EditFile {
671: my $request = shift;
672:
673: # Split the command into it's pieces: edit:filetype:script
674:
675: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
676:
677: # Check the pre-coditions for success:
678:
679: if($request != "edit") { # Something is amiss afoot alack.
680: return "error:edit request detected, but request != 'edit'\n";
681: }
682: if( ($filetype ne "hosts") &&
683: ($filetype ne "domain")) {
684: return "error:edit requested with invalid file specifier: $filetype \n";
685: }
686:
687: # Split the edit script and check it's validity.
688:
689: my @scriptlines = split(/\n/, $script); # one line per element.
690: my $linecount = scalar(@scriptlines);
691: for(my $i = 0; $i < $linecount; $i++) {
692: chomp($scriptlines[$i]);
693: if(!isValidEditCommand($scriptlines[$i])) {
694: return "error:edit with bad script line: '$scriptlines[$i]' \n";
695: }
696: }
697:
698: # Execute the edit operation.
699: # - Create a config file editor for the appropriate file and
700: # - execute each command in the script:
701: #
702: my $configfile = ConfigFileFromSelector($filetype);
703: if (!(defined $configfile)) {
704: return "refused\n";
705: }
706: my $editor = ConfigFileEdit->new($configfile);
707:
708: for (my $i = 0; $i < $linecount; $i++) {
709: ApplyEdit($scriptlines[$i], $editor);
710: }
711: # If the file is the host file, ensure that our host is
712: # adjusted to have our ip:
713: #
714: if($filetype eq "host") {
715: AdjustOurHost($editor);
716: }
717: # Finally replace the current file with our file.
718: #
719: ReplaceConfigFile($configfile, $editor);
720:
721: return "ok\n";
722: }
723: #
724: # Convert an error return code from lcpasswd to a string value.
725: #
726: sub lcpasswdstrerror {
727: my $ErrorCode = shift;
728: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
729: return "lcpasswd Unrecognized error return value ".$ErrorCode;
730: } else {
731: return $passwderrors[$ErrorCode];
732: }
733: }
734:
735: #
736: # Convert an error return code from lcuseradd to a string value:
737: #
738: sub lcuseraddstrerror {
739: my $ErrorCode = shift;
740: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
741: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
742: } else {
743: return $adderrors[$ErrorCode];
744: }
745: }
746:
747: # grabs exception and records it to log before exiting
748: sub catchexception {
749: my ($error)=@_;
750: $SIG{'QUIT'}='DEFAULT';
751: $SIG{__DIE__}='DEFAULT';
752: &status("Catching exception");
753: &logthis("<font color='red'>CRITICAL: "
754: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
755: ."a crash with this error msg->[$error]</font>");
756: &logthis('Famous last words: '.$status.' - '.$lastlog);
757: if ($client) { print $client "error: $error\n"; }
758: $server->close();
759: die($error);
760: }
761:
762: sub timeout {
763: &status("Handling Timeout");
764: &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
765: &catchexception('Timeout');
766: }
767: # -------------------------------- Set signal handlers to record abnormal exits
768:
769: $SIG{'QUIT'}=\&catchexception;
770: $SIG{__DIE__}=\&catchexception;
771:
772: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
773: &status("Read loncapa.conf and loncapa_apache.conf");
774: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
775: %perlvar=%{$perlvarref};
776: undef $perlvarref;
777:
778: # ----------------------------- Make sure this process is running from user=www
779: my $wwwid=getpwnam('www');
780: if ($wwwid!=$<) {
781: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
782: my $subj="LON: $currenthostid User ID mismatch";
783: system("echo 'User ID mismatch. lond must be run as user www.' |\
784: mailto $emailto -s '$subj' > /dev/null");
785: exit 1;
786: }
787:
788: # --------------------------------------------- Check if other instance running
789:
790: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
791:
792: if (-e $pidfile) {
793: my $lfh=IO::File->new("$pidfile");
794: my $pide=<$lfh>;
795: chomp($pide);
796: if (kill 0 => $pide) { die "already running"; }
797: }
798:
799: # ------------------------------------------------------------- Read hosts file
800:
801:
802:
803: # establish SERVER socket, bind and listen.
804: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
805: Type => SOCK_STREAM,
806: Proto => 'tcp',
807: Reuse => 1,
808: Listen => 10 )
809: or die "making socket: $@\n";
810:
811: # --------------------------------------------------------- Do global variables
812:
813: # global variables
814:
815: my %children = (); # keys are current child process IDs
816:
817: sub REAPER { # takes care of dead children
818: $SIG{CHLD} = \&REAPER;
819: &status("Handling child death");
820: my $pid;
821: do {
822: $pid = waitpid(-1,&WNOHANG());
823: if (defined($children{$pid})) {
824: &logthis("Child $pid died");
825: delete($children{$pid});
826: } elsif ($pid > 0) {
827: &logthis("Unknown Child $pid died");
828: }
829: } while ( $pid > 0 );
830: foreach my $child (keys(%children)) {
831: $pid = waitpid($child,&WNOHANG());
832: if ($pid > 0) {
833: &logthis("Child $child - $pid looks like we missed it's death");
834: delete($children{$pid});
835: }
836: }
837: &status("Finished Handling child death");
838: }
839:
840: sub HUNTSMAN { # signal handler for SIGINT
841: &status("Killing children (INT)");
842: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
843: kill 'INT' => keys %children;
844: &logthis("Free socket: ".shutdown($server,2)); # free up socket
845: my $execdir=$perlvar{'lonDaemons'};
846: unlink("$execdir/logs/lond.pid");
847: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
848: &status("Done killing children");
849: exit; # clean up with dignity
850: }
851:
852: sub HUPSMAN { # signal handler for SIGHUP
853: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
854: &status("Killing children for restart (HUP)");
855: kill 'INT' => keys %children;
856: &logthis("Free socket: ".shutdown($server,2)); # free up socket
857: &logthis("<font color='red'>CRITICAL: Restarting</font>");
858: my $execdir=$perlvar{'lonDaemons'};
859: unlink("$execdir/logs/lond.pid");
860: &status("Restarting self (HUP)");
861: exec("$execdir/lond"); # here we go again
862: }
863:
864: #
865: # Kill off hashes that describe the host table prior to re-reading it.
866: # Hashes affected are:
867: # %hostid, %hostdom %hostip
868: #
869: sub KillHostHashes {
870: foreach my $key (keys %hostid) {
871: delete $hostid{$key};
872: }
873: foreach my $key (keys %hostdom) {
874: delete $hostdom{$key};
875: }
876: foreach my $key (keys %hostip) {
877: delete $hostip{$key};
878: }
879: }
880: #
881: # Read in the host table from file and distribute it into the various hashes:
882: #
883: # - %hostid - Indexed by IP, the loncapa hostname.
884: # - %hostdom - Indexed by loncapa hostname, the domain.
885: # - %hostip - Indexed by hostid, the Ip address of the host.
886: sub ReadHostTable {
887:
888: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
889:
890: while (my $configline=<CONFIG>) {
891: if (!($configline =~ /^\s*\#/)) {
892: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
893: chomp($ip); $ip=~s/\D+$//;
894: $hostid{$ip}=$id;
895: $hostdom{$id}=$domain;
896: $hostip{$id}=$ip;
897: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
898: }
899: }
900: close(CONFIG);
901: }
902: #
903: # Reload the Apache daemon's state.
904: # This is done by invoking /home/httpd/perl/apachereload
905: # a setuid perl script that can be root for us to do this job.
906: #
907: sub ReloadApache {
908: my $execdir = $perlvar{'lonDaemons'};
909: my $script = $execdir."/apachereload";
910: system($script);
911: }
912:
913: #
914: # Called in response to a USR2 signal.
915: # - Reread hosts.tab
916: # - All children connected to hosts that were removed from hosts.tab
917: # are killed via SIGINT
918: # - All children connected to previously existing hosts are sent SIGUSR1
919: # - Our internal hosts hash is updated to reflect the new contents of
920: # hosts.tab causing connections from hosts added to hosts.tab to
921: # now be honored.
922: #
923: sub UpdateHosts {
924: &status("Reload hosts.tab");
925: logthis('<font color="blue"> Updating connections </font>');
926: #
927: # The %children hash has the set of IP's we currently have children
928: # on. These need to be matched against records in the hosts.tab
929: # Any ip's no longer in the table get killed off they correspond to
930: # either dropped or changed hosts. Note that the re-read of the table
931: # will take care of new and changed hosts as connections come into being.
932:
933:
934: KillHostHashes;
935: ReadHostTable;
936:
937: foreach my $child (keys %children) {
938: my $childip = $children{$child};
939: if(!$hostid{$childip}) {
940: logthis('<font color="blue"> UpdateHosts killing child '
941: ." $child for ip $childip </font>");
942: kill('INT', $child);
943: } else {
944: logthis('<font color="green"> keeping child for ip '
945: ." $childip (pid=$child) </font>");
946: }
947: }
948: ReloadApache;
949: &status("Finished reloading hosts.tab");
950: }
951:
952:
953: sub checkchildren {
954: &status("Checking on the children (sending signals)");
955: &initnewstatus();
956: &logstatus();
957: &logthis('Going to check on the children');
958: my $docdir=$perlvar{'lonDocRoot'};
959: foreach (sort keys %children) {
960: sleep 1;
961: unless (kill 'USR1' => $_) {
962: &logthis ('Child '.$_.' is dead');
963: &logstatus($$.' is dead');
964: }
965: }
966: sleep 5;
967: $SIG{ALRM} = sub { die "timeout" };
968: $SIG{__DIE__} = 'DEFAULT';
969: &status("Checking on the children (waiting for reports)");
970: foreach (sort keys %children) {
971: unless (-e "$docdir/lon-status/londchld/$_.txt") {
972: eval {
973: alarm(300);
974: &logthis('Child '.$_.' did not respond');
975: kill 9 => $_;
976: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
977: #$subj="LON: $currenthostid killed lond process $_";
978: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
979: #$execdir=$perlvar{'lonDaemons'};
980: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
981: alarm(0);
982: }
983: }
984: }
985: $SIG{ALRM} = 'DEFAULT';
986: $SIG{__DIE__} = \&catchexception;
987: &status("Finished checking children");
988: }
989:
990: # --------------------------------------------------------------------- Logging
991:
992: sub logthis {
993: my $message=shift;
994: my $execdir=$perlvar{'lonDaemons'};
995: my $fh=IO::File->new(">>$execdir/logs/lond.log");
996: my $now=time;
997: my $local=localtime($now);
998: $lastlog=$local.': '.$message;
999: print $fh "$local ($$): $message\n";
1000: }
1001:
1002: # ------------------------- Conditional log if $DEBUG true.
1003: sub Debug {
1004: my $message = shift;
1005: if($DEBUG) {
1006: &logthis($message);
1007: }
1008: }
1009:
1010: #
1011: # Sub to do replies to client.. this gives a hook for some
1012: # debug tracing too:
1013: # Parameters:
1014: # fd - File open on client.
1015: # reply - Text to send to client.
1016: # request - Original request from client.
1017: #
1018: sub Reply {
1019:
1020: my ($fd, $reply, $request) = @_;
1021:
1022: print $fd $reply;
1023: Debug("Request was $request Reply was $reply");
1024:
1025: }
1026: # ------------------------------------------------------------------ Log status
1027:
1028: sub logstatus {
1029: &status("Doing logging");
1030: my $docdir=$perlvar{'lonDocRoot'};
1031: {
1032: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
1033: print $fh $$."\t".$clientname."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
1034: $fh->close();
1035: }
1036: &status("Finished londstatus.txt");
1037: {
1038: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
1039: print $fh $status."\n".$lastlog."\n".time;
1040: $fh->close();
1041: }
1042: &status("Finished logging");
1043: }
1044:
1045: sub initnewstatus {
1046: my $docdir=$perlvar{'lonDocRoot'};
1047: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
1048: my $now=time;
1049: my $local=localtime($now);
1050: print $fh "LOND status $local - parent $$\n\n";
1051: opendir(DIR,"$docdir/lon-status/londchld");
1052: while (my $filename=readdir(DIR)) {
1053: unlink("$docdir/lon-status/londchld/$filename");
1054: }
1055: closedir(DIR);
1056: }
1057:
1058: # -------------------------------------------------------------- Status setting
1059:
1060: sub status {
1061: my $what=shift;
1062: my $now=time;
1063: my $local=localtime($now);
1064: $status=$local.': '.$what;
1065: $0='lond: '.$what.' '.$local;
1066: }
1067:
1068: # -------------------------------------------------------- Escape Special Chars
1069:
1070: sub escape {
1071: my $str=shift;
1072: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
1073: return $str;
1074: }
1075:
1076: # ----------------------------------------------------- Un-Escape Special Chars
1077:
1078: sub unescape {
1079: my $str=shift;
1080: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1081: return $str;
1082: }
1083:
1084: # ----------------------------------------------------------- Send USR1 to lonc
1085:
1086: sub reconlonc {
1087: my $peerfile=shift;
1088: &logthis("Trying to reconnect for $peerfile");
1089: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
1090: if (my $fh=IO::File->new("$loncfile")) {
1091: my $loncpid=<$fh>;
1092: chomp($loncpid);
1093: if (kill 0 => $loncpid) {
1094: &logthis("lonc at pid $loncpid responding, sending USR1");
1095: kill USR1 => $loncpid;
1096: } else {
1097: &logthis(
1098: "<font color='red'>CRITICAL: "
1099: ."lonc at pid $loncpid not responding, giving up</font>");
1100: }
1101: } else {
1102: &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
1103: }
1104: }
1105:
1106: # -------------------------------------------------- Non-critical communication
1107:
1108: sub subreply {
1109: my ($cmd,$server)=@_;
1110: my $peerfile="$perlvar{'lonSockDir'}/$server";
1111: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
1112: Type => SOCK_STREAM,
1113: Timeout => 10)
1114: or return "con_lost";
1115: print $sclient "$cmd\n";
1116: my $answer=<$sclient>;
1117: chomp($answer);
1118: if (!$answer) { $answer="con_lost"; }
1119: return $answer;
1120: }
1121:
1122: sub reply {
1123: my ($cmd,$server)=@_;
1124: my $answer;
1125: if ($server ne $currenthostid) {
1126: $answer=subreply($cmd,$server);
1127: if ($answer eq 'con_lost') {
1128: $answer=subreply("ping",$server);
1129: if ($answer ne $server) {
1130: &logthis("sub reply: answer != server answer is $answer, server is $server");
1131: &reconlonc("$perlvar{'lonSockDir'}/$server");
1132: }
1133: $answer=subreply($cmd,$server);
1134: }
1135: } else {
1136: $answer='self_reply';
1137: }
1138: return $answer;
1139: }
1140:
1141: # -------------------------------------------------------------- Talk to lonsql
1142:
1143: sub sqlreply {
1144: my ($cmd)=@_;
1145: my $answer=subsqlreply($cmd);
1146: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
1147: return $answer;
1148: }
1149:
1150: sub subsqlreply {
1151: my ($cmd)=@_;
1152: my $unixsock="mysqlsock";
1153: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
1154: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
1155: Type => SOCK_STREAM,
1156: Timeout => 10)
1157: or return "con_lost";
1158: print $sclient "$cmd\n";
1159: my $answer=<$sclient>;
1160: chomp($answer);
1161: if (!$answer) { $answer="con_lost"; }
1162: return $answer;
1163: }
1164:
1165: # -------------------------------------------- Return path to profile directory
1166:
1167: sub propath {
1168: my ($udom,$uname)=@_;
1169: $udom=~s/\W//g;
1170: $uname=~s/\W//g;
1171: my $subdir=$uname.'__';
1172: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1173: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
1174: return $proname;
1175: }
1176:
1177: # --------------------------------------- Is this the home server of an author?
1178:
1179: sub ishome {
1180: my $author=shift;
1181: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1182: my ($udom,$uname)=split(/\//,$author);
1183: my $proname=propath($udom,$uname);
1184: if (-e $proname) {
1185: return 'owner';
1186: } else {
1187: return 'not_owner';
1188: }
1189: }
1190:
1191: # ======================================================= Continue main program
1192: # ---------------------------------------------------- Fork once and dissociate
1193:
1194: my $fpid=fork;
1195: exit if $fpid;
1196: die "Couldn't fork: $!" unless defined ($fpid);
1197:
1198: POSIX::setsid() or die "Can't start new session: $!";
1199:
1200: # ------------------------------------------------------- Write our PID on disk
1201:
1202: my $execdir=$perlvar{'lonDaemons'};
1203: open (PIDSAVE,">$execdir/logs/lond.pid");
1204: print PIDSAVE "$$\n";
1205: close(PIDSAVE);
1206: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1207: &status('Starting');
1208:
1209:
1210:
1211: # ----------------------------------------------------- Install signal handlers
1212:
1213:
1214: $SIG{CHLD} = \&REAPER;
1215: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1216: $SIG{HUP} = \&HUPSMAN;
1217: $SIG{USR1} = \&checkchildren;
1218: $SIG{USR2} = \&UpdateHosts;
1219:
1220: # Read the host hashes:
1221:
1222: ReadHostTable;
1223:
1224: # --------------------------------------------------------------
1225: # Accept connections. When a connection comes in, it is validated
1226: # and if good, a child process is created to process transactions
1227: # along the connection.
1228:
1229: while (1) {
1230: &status('Starting accept');
1231: $client = $server->accept() or next;
1232: &status('Accepted '.$client.' off to spawn');
1233: make_new_child($client);
1234: &status('Finished spawning');
1235: }
1236:
1237: sub make_new_child {
1238: my $pid;
1239: my $cipher;
1240: my $sigset;
1241:
1242: $client = shift;
1243: &status('Starting new child '.$client);
1244: &logthis('<font color="green"> Attempting to start child ('.$client.
1245: ")</font>");
1246: # block signal for fork
1247: $sigset = POSIX::SigSet->new(SIGINT);
1248: sigprocmask(SIG_BLOCK, $sigset)
1249: or die "Can't block SIGINT for fork: $!\n";
1250:
1251: die "fork: $!" unless defined ($pid = fork);
1252:
1253: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
1254: # connection liveness.
1255:
1256: #
1257: # Figure out who we're talking to so we can record the peer in
1258: # the pid hash.
1259: #
1260: my $caller = getpeername($client);
1261: my ($port,$iaddr);
1262: if (defined($caller) && length($caller) > 0) {
1263: ($port,$iaddr)=unpack_sockaddr_in($caller);
1264: } else {
1265: &logthis("Unable to determine who caller was, getpeername returned nothing");
1266: }
1267: if (defined($iaddr)) {
1268: $clientip=inet_ntoa($iaddr);
1269: } else {
1270: &logthis("Unable to determine clinetip");
1271: $clientip='Unavailable';
1272: }
1273:
1274: if ($pid) {
1275: # Parent records the child's birth and returns.
1276: sigprocmask(SIG_UNBLOCK, $sigset)
1277: or die "Can't unblock SIGINT for fork: $!\n";
1278: $children{$pid} = $clientip;
1279: &status('Started child '.$pid);
1280: return;
1281: } else {
1282: # Child can *not* return from this subroutine.
1283: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1284: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
1285: #don't get intercepted
1286: $SIG{USR1}= \&logstatus;
1287: $SIG{ALRM}= \&timeout;
1288: $lastlog='Forked ';
1289: $status='Forked';
1290:
1291: # unblock signals
1292: sigprocmask(SIG_UNBLOCK, $sigset)
1293: or die "Can't unblock SIGINT for fork: $!\n";
1294:
1295: my $tmpsnum=0;
1296: #---------------------------------------------------- kerberos 5 initialization
1297: &Authen::Krb5::init_context();
1298: &Authen::Krb5::init_ets();
1299:
1300: &status('Accepted connection');
1301: # =============================================================================
1302: # do something with the connection
1303: # -----------------------------------------------------------------------------
1304: # see if we know client and check for spoof IP by challenge
1305:
1306: ReadManagerTable; # May also be a manager!!
1307:
1308: my $clientrec=($hostid{$clientip} ne undef);
1309: my $ismanager=($managers{$clientip} ne undef);
1310: $clientname = "[unknonwn]";
1311: if($clientrec) { # Establish client type.
1312: $ConnectionType = "client";
1313: $clientname = $hostid{$clientip};
1314: if($ismanager) {
1315: $ConnectionType = "both";
1316: }
1317: } else {
1318: $ConnectionType = "manager";
1319: $clientname = $managers{$clientip};
1320: }
1321: my $clientok;
1322: if ($clientrec || $ismanager) {
1323: &status("Waiting for init from $clientip $clientname");
1324: &logthis('<font color="yellow">INFO: Connection, '.
1325: $clientip.
1326: " ($clientname) connection type = $ConnectionType </font>" );
1327: &status("Connecting $clientip ($clientname))");
1328: my $remotereq=<$client>;
1329: $remotereq=~s/[^\w:]//g;
1330: if ($remotereq =~ /^init/) {
1331: &sethost("sethost:$perlvar{'lonHostID'}");
1332: my $challenge="$$".time;
1333: print $client "$challenge\n";
1334: &status(
1335: "Waiting for challenge reply from $clientip ($clientname)");
1336: $remotereq=<$client>;
1337: $remotereq=~s/\W//g;
1338: if ($challenge eq $remotereq) {
1339: $clientok=1;
1340: print $client "ok\n";
1341: } else {
1342: &logthis(
1343: "<font color='blue'>WARNING: $clientip did not reply challenge</font>");
1344: &status('No challenge reply '.$clientip);
1345: }
1346: } else {
1347: &logthis(
1348: "<font color='blue'>WARNING: "
1349: ."$clientip failed to initialize: >$remotereq< </font>");
1350: &status('No init '.$clientip);
1351: }
1352: } else {
1353: &logthis(
1354: "<font color='blue'>WARNING: Unknown client $clientip</font>");
1355: &status('Hung up on '.$clientip);
1356: }
1357: if ($clientok) {
1358: # ---------------- New known client connecting, could mean machine online again
1359:
1360: foreach my $id (keys(%hostip)) {
1361: if ($hostip{$id} ne $clientip ||
1362: $hostip{$currenthostid} eq $clientip) {
1363: # no need to try to do recon's to myself
1364: next;
1365: }
1366: &reconlonc("$perlvar{'lonSockDir'}/$id");
1367: }
1368: &logthis("<font color='green'>Established connection: $clientname</font>");
1369: &status('Will listen to '.$clientname);
1370: # ------------------------------------------------------------ Process requests
1371: while (my $userinput=<$client>) {
1372: chomp($userinput);
1373: Debug("Request = $userinput\n");
1374: &status('Processing '.$clientname.': '.$userinput);
1375: my $wasenc=0;
1376: alarm(120);
1377: # ------------------------------------------------------------ See if encrypted
1378: if ($userinput =~ /^enc/) {
1379: if ($cipher) {
1380: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
1381: $userinput='';
1382: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
1383: $userinput.=
1384: $cipher->decrypt(
1385: pack("H16",substr($encinput,$encidx,16))
1386: );
1387: }
1388: $userinput=substr($userinput,0,$cmdlength);
1389: $wasenc=1;
1390: }
1391: }
1392:
1393: # ------------------------------------------------------------- Normal commands
1394: # ------------------------------------------------------------------------ ping
1395: if ($userinput =~ /^ping/) { # client only
1396: if(isClient) {
1397: print $client "$currenthostid\n";
1398: } else {
1399: Reply($client, "refused\n", $userinput);
1400: }
1401: # ------------------------------------------------------------------------ pong
1402: }elsif ($userinput =~ /^pong/) { # client only
1403: if(isClient) {
1404: my $reply=&reply("ping",$clientname);
1405: print $client "$currenthostid:$reply\n";
1406: } else {
1407: Reply($client, "refused\n", $userinput);
1408: }
1409: # ------------------------------------------------------------------------ ekey
1410: } elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
1411: my $buildkey=time.$$.int(rand 100000);
1412: $buildkey=~tr/1-6/A-F/;
1413: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1414: my $key=$currenthostid.$clientname;
1415: $key=~tr/a-z/A-Z/;
1416: $key=~tr/G-P/0-9/;
1417: $key=~tr/Q-Z/0-9/;
1418: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1419: $key=substr($key,0,32);
1420: my $cipherkey=pack("H32",$key);
1421: $cipher=new IDEA $cipherkey;
1422: print $client "$buildkey\n";
1423: # ------------------------------------------------------------------------ load
1424: } elsif ($userinput =~ /^load/) { # client only
1425: if (isClient) {
1426: my $loadavg;
1427: {
1428: my $loadfile=IO::File->new('/proc/loadavg');
1429: $loadavg=<$loadfile>;
1430: }
1431: $loadavg =~ s/\s.*//g;
1432: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1433: print $client "$loadpercent\n";
1434: } else {
1435: Reply($client, "refused\n", $userinput);
1436:
1437: }
1438: # -------------------------------------------------------------------- userload
1439: } elsif ($userinput =~ /^userload/) { # client only
1440: if(isClient) {
1441: my $userloadpercent=&userload();
1442: print $client "$userloadpercent\n";
1443: } else {
1444: Reply($client, "refused\n", $userinput);
1445:
1446: }
1447: #
1448: # Transactions requiring encryption:
1449: #
1450: # ----------------------------------------------------------------- currentauth
1451: } elsif ($userinput =~ /^currentauth/) {
1452: if (($wasenc==1) && isClient) { # Encoded & client only.
1453: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1454: my $result = GetAuthType($udom, $uname);
1455: if($result eq "nouser") {
1456: print $client "unknown_user\n";
1457: }
1458: else {
1459: print $client "$result\n"
1460: }
1461: } else {
1462: Reply($client, "refused\n", $userinput);
1463:
1464: }
1465: #--------------------------------------------------------------------- pushfile
1466: } elsif($userinput =~ /^pushfile/) { # encoded & manager.
1467: if(($wasenc == 1) && isManager) {
1468: my $cert = GetCertificate($userinput);
1469: if(ValidManager($cert)) {
1470: my $reply = PushFile($userinput);
1471: print $client "$reply\n";
1472: } else {
1473: print $client "refused\n";
1474: }
1475: } else {
1476: Reply($client, "refused\n", $userinput);
1477:
1478: }
1479: #--------------------------------------------------------------------- reinit
1480: } elsif($userinput =~ /^reinit/) { # Encoded and manager
1481: if (($wasenc == 1) && isManager) {
1482: my $cert = GetCertificate($userinput);
1483: if(ValidManager($cert)) {
1484: chomp($userinput);
1485: my $reply = ReinitProcess($userinput);
1486: print $client "$reply\n";
1487: } else {
1488: print $client "refused\n";
1489: }
1490: } else {
1491: Reply($client, "refused\n", $userinput);
1492: }
1493: #------------------------------------------------------------------------- edit
1494: } elsif ($userinput =~ /^edit/) { # encoded and manager:
1495: if(($wasenc ==1) && (isManager)) {
1496: my $cert = GetCertificate($userinput);
1497: if(ValidManager($cert)) {
1498: my($command, $filetype, $script) = split(/:/, $userinput);
1499: if (($filetype eq "hosts") || ($filetype eq "domain")) {
1500: if($script ne "") {
1501: Reply($client, EditFile($userinput));
1502: } else {
1503: Reply($client,"refused\n",$userinput);
1504: }
1505: } else {
1506: Reply($client,"refused\n",$userinput);
1507: }
1508: } else {
1509: Reply($client,"refused\n",$userinput);
1510: }
1511: } else {
1512: Reply($client,"refused\n",$userinput);
1513: }
1514: # ------------------------------------------------------------------------ auth
1515: } elsif ($userinput =~ /^auth/) { # Encoded and client only.
1516: if (($wasenc==1) && isClient) {
1517: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1518: chomp($upass);
1519: $upass=unescape($upass);
1520: my $proname=propath($udom,$uname);
1521: my $passfilename="$proname/passwd";
1522: if (-e $passfilename) {
1523: my $pf = IO::File->new($passfilename);
1524: my $realpasswd=<$pf>;
1525: chomp($realpasswd);
1526: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1527: my $pwdcorrect=0;
1528: if ($howpwd eq 'internal') {
1529: &Debug("Internal auth");
1530: $pwdcorrect=
1531: (crypt($upass,$contentpwd) eq $contentpwd);
1532: } elsif ($howpwd eq 'unix') {
1533: &Debug("Unix auth");
1534: if((getpwnam($uname))[1] eq "") { #no such user!
1535: $pwdcorrect = 0;
1536: } else {
1537: $contentpwd=(getpwnam($uname))[1];
1538: my $pwauth_path="/usr/local/sbin/pwauth";
1539: unless ($contentpwd eq 'x') {
1540: $pwdcorrect=
1541: (crypt($upass,$contentpwd) eq
1542: $contentpwd);
1543: }
1544:
1545: elsif (-e $pwauth_path) {
1546: open PWAUTH, "|$pwauth_path" or
1547: die "Cannot invoke authentication";
1548: print PWAUTH "$uname\n$upass\n";
1549: close PWAUTH;
1550: $pwdcorrect=!$?;
1551: }
1552: }
1553: } elsif ($howpwd eq 'krb4') {
1554: my $null=pack("C",0);
1555: unless ($upass=~/$null/) {
1556: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1557: ($uname,"",$contentpwd,'krbtgt',
1558: $contentpwd,1,$upass);
1559: if (!$krb4_error) {
1560: $pwdcorrect = 1;
1561: } else {
1562: $pwdcorrect=0;
1563: # log error if it is not a bad password
1564: if ($krb4_error != 62) {
1565: &logthis('krb4:'.$uname.','.
1566: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1567: }
1568: }
1569: }
1570: } elsif ($howpwd eq 'krb5') {
1571: my $null=pack("C",0);
1572: unless ($upass=~/$null/) {
1573: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1574: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1575: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1576: my $credentials=&Authen::Krb5::cc_default();
1577: $credentials->initialize($krbclient);
1578: my $krbreturn =
1579: &Authen::Krb5::get_in_tkt_with_password(
1580: $krbclient,$krbserver,$upass,$credentials);
1581: # unless ($krbreturn) {
1582: # &logthis("Krb5 Error: ".
1583: # &Authen::Krb5::error());
1584: # }
1585: $pwdcorrect = ($krbreturn == 1);
1586: } else { $pwdcorrect=0; }
1587: } elsif ($howpwd eq 'localauth') {
1588: $pwdcorrect=&localauth::localauth($uname,$upass,
1589: $contentpwd);
1590: }
1591: if ($pwdcorrect) {
1592: print $client "authorized\n";
1593: } else {
1594: print $client "non_authorized\n";
1595: }
1596: } else {
1597: print $client "unknown_user\n";
1598: }
1599: } else {
1600: Reply($client, "refused\n", $userinput);
1601:
1602: }
1603: # ---------------------------------------------------------------------- passwd
1604: } elsif ($userinput =~ /^passwd/) { # encoded and client
1605: if (($wasenc==1) && isClient) {
1606: my
1607: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1608: chomp($npass);
1609: $upass=&unescape($upass);
1610: $npass=&unescape($npass);
1611: &Debug("Trying to change password for $uname");
1612: my $proname=propath($udom,$uname);
1613: my $passfilename="$proname/passwd";
1614: if (-e $passfilename) {
1615: my $realpasswd;
1616: { my $pf = IO::File->new($passfilename);
1617: $realpasswd=<$pf>; }
1618: chomp($realpasswd);
1619: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1620: if ($howpwd eq 'internal') {
1621: &Debug("internal auth");
1622: if (crypt($upass,$contentpwd) eq $contentpwd) {
1623: my $salt=time;
1624: $salt=substr($salt,6,2);
1625: my $ncpass=crypt($npass,$salt);
1626: {
1627: my $pf;
1628: if ($pf = IO::File->new(">$passfilename")) {
1629: print $pf "internal:$ncpass\n";
1630: &logthis("Result of password change for $uname: pwchange_success");
1631: print $client "ok\n";
1632: } else {
1633: &logthis("Unable to open $uname passwd to change password");
1634: print $client "non_authorized\n";
1635: }
1636: }
1637:
1638: } else {
1639: print $client "non_authorized\n";
1640: }
1641: } elsif ($howpwd eq 'unix') {
1642: # Unix means we have to access /etc/password
1643: # one way or another.
1644: # First: Make sure the current password is
1645: # correct
1646: &Debug("auth is unix");
1647: $contentpwd=(getpwnam($uname))[1];
1648: my $pwdcorrect = "0";
1649: my $pwauth_path="/usr/local/sbin/pwauth";
1650: unless ($contentpwd eq 'x') {
1651: $pwdcorrect=
1652: (crypt($upass,$contentpwd) eq $contentpwd);
1653: } elsif (-e $pwauth_path) {
1654: open PWAUTH, "|$pwauth_path" or
1655: die "Cannot invoke authentication";
1656: print PWAUTH "$uname\n$upass\n";
1657: close PWAUTH;
1658: &Debug("exited pwauth with $? ($uname,$upass) ");
1659: $pwdcorrect=($? == 0);
1660: }
1661: if ($pwdcorrect) {
1662: my $execdir=$perlvar{'lonDaemons'};
1663: &Debug("Opening lcpasswd pipeline");
1664: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1665: print $pf "$uname\n$npass\n$npass\n";
1666: close $pf;
1667: my $err = $?;
1668: my $result = ($err>0 ? 'pwchange_failure'
1669: : 'ok');
1670: &logthis("Result of password change for $uname: ".
1671: &lcpasswdstrerror($?));
1672: print $client "$result\n";
1673: } else {
1674: print $client "non_authorized\n";
1675: }
1676: } else {
1677: print $client "auth_mode_error\n";
1678: }
1679: } else {
1680: print $client "unknown_user\n";
1681: }
1682: } else {
1683: Reply($client, "refused\n", $userinput);
1684:
1685: }
1686: # -------------------------------------------------------------------- makeuser
1687: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1688: &Debug("Make user received");
1689: my $oldumask=umask(0077);
1690: if (($wasenc==1) && isClient) {
1691: my
1692: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1693: &Debug("cmd =".$cmd." $udom =".$udom.
1694: " uname=".$uname);
1695: chomp($npass);
1696: $npass=&unescape($npass);
1697: my $proname=propath($udom,$uname);
1698: my $passfilename="$proname/passwd";
1699: &Debug("Password file created will be:".
1700: $passfilename);
1701: if (-e $passfilename) {
1702: print $client "already_exists\n";
1703: } elsif ($udom ne $currentdomainid) {
1704: print $client "not_right_domain\n";
1705: } else {
1706: my @fpparts=split(/\//,$proname);
1707: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1708: my $fperror='';
1709: for (my $i=3;$i<=$#fpparts;$i++) {
1710: $fpnow.='/'.$fpparts[$i];
1711: unless (-e $fpnow) {
1712: unless (mkdir($fpnow,0777)) {
1713: $fperror="error: ".($!+0)
1714: ." mkdir failed while attempting "
1715: ."makeuser";
1716: }
1717: }
1718: }
1719: unless ($fperror) {
1720: my $result=&make_passwd_file($uname, $umode,$npass,
1721: $passfilename);
1722: print $client $result;
1723: } else {
1724: print $client "$fperror\n";
1725: }
1726: }
1727: } else {
1728: Reply($client, "refused\n", $userinput);
1729:
1730: }
1731: umask($oldumask);
1732: # -------------------------------------------------------------- changeuserauth
1733: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1734: &Debug("Changing authorization");
1735: if (($wasenc==1) && isClient) {
1736: my
1737: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1738: chomp($npass);
1739: &Debug("cmd = ".$cmd." domain= ".$udom.
1740: "uname =".$uname." umode= ".$umode);
1741: $npass=&unescape($npass);
1742: my $proname=&propath($udom,$uname);
1743: my $passfilename="$proname/passwd";
1744: if ($udom ne $currentdomainid) {
1745: print $client "not_right_domain\n";
1746: } else {
1747: my $result=&make_passwd_file($uname, $umode,$npass,
1748: $passfilename);
1749: print $client $result;
1750: }
1751: } else {
1752: Reply($client, "refused\n", $userinput);
1753:
1754: }
1755: # ------------------------------------------------------------------------ home
1756: } elsif ($userinput =~ /^home/) { # client clear or encoded
1757: if(isClient) {
1758: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1759: chomp($uname);
1760: my $proname=propath($udom,$uname);
1761: if (-e $proname) {
1762: print $client "found\n";
1763: } else {
1764: print $client "not_found\n";
1765: }
1766: } else {
1767: Reply($client, "refused\n", $userinput);
1768:
1769: }
1770: # ---------------------------------------------------------------------- update
1771: } elsif ($userinput =~ /^update/) { # client clear or encoded.
1772: if(isClient) {
1773: my ($cmd,$fname)=split(/:/,$userinput);
1774: my $ownership=ishome($fname);
1775: if ($ownership eq 'not_owner') {
1776: if (-e $fname) {
1777: my ($dev,$ino,$mode,$nlink,
1778: $uid,$gid,$rdev,$size,
1779: $atime,$mtime,$ctime,
1780: $blksize,$blocks)=stat($fname);
1781: my $now=time;
1782: my $since=$now-$atime;
1783: if ($since>$perlvar{'lonExpire'}) {
1784: my $reply=
1785: &reply("unsub:$fname","$clientname");
1786: unlink("$fname");
1787: } else {
1788: my $transname="$fname.in.transfer";
1789: my $remoteurl=
1790: &reply("sub:$fname","$clientname");
1791: my $response;
1792: {
1793: my $ua=new LWP::UserAgent;
1794: my $request=new HTTP::Request('GET',"$remoteurl");
1795: $response=$ua->request($request,$transname);
1796: }
1797: if ($response->is_error()) {
1798: unlink($transname);
1799: my $message=$response->status_line;
1800: &logthis(
1801: "LWP GET: $message for $fname ($remoteurl)");
1802: } else {
1803: if ($remoteurl!~/\.meta$/) {
1804: my $ua=new LWP::UserAgent;
1805: my $mrequest=
1806: new HTTP::Request('GET',$remoteurl.'.meta');
1807: my $mresponse=
1808: $ua->request($mrequest,$fname.'.meta');
1809: if ($mresponse->is_error()) {
1810: unlink($fname.'.meta');
1811: }
1812: }
1813: rename($transname,$fname);
1814: }
1815: }
1816: print $client "ok\n";
1817: } else {
1818: print $client "not_found\n";
1819: }
1820: } else {
1821: print $client "rejected\n";
1822: }
1823: } else {
1824: Reply($client, "refused\n", $userinput);
1825:
1826: }
1827: # -------------------------------------- fetch a user file from a remote server
1828: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
1829: if(isClient) {
1830: my ($cmd,$fname)=split(/:/,$userinput);
1831: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1832: my $udir=propath($udom,$uname).'/userfiles';
1833: unless (-e $udir) { mkdir($udir,0770); }
1834: if (-e $udir) {
1835: $ufile=~s/^[\.\~]+//;
1836: my $path = $udir;
1837: if ($ufile =~m|(.+)/([^/]+)$|) {
1838: my @parts=split('/',$1);
1839: foreach my $part (@parts) {
1840: $path .= '/'.$part;
1841: if ((-e $path)!=1) {
1842: mkdir($path,0770);
1843: }
1844: }
1845: }
1846: my $destname=$udir.'/'.$ufile;
1847: my $transname=$udir.'/'.$ufile.'.in.transit';
1848: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1849: my $response;
1850: {
1851: my $ua=new LWP::UserAgent;
1852: my $request=new HTTP::Request('GET',"$remoteurl");
1853: $response=$ua->request($request,$transname);
1854: }
1855: if ($response->is_error()) {
1856: unlink($transname);
1857: my $message=$response->status_line;
1858: &logthis("LWP GET: $message for $fname ($remoteurl)");
1859: print $client "failed\n";
1860: } else {
1861: if (!rename($transname,$destname)) {
1862: &logthis("Unable to move $transname to $destname");
1863: unlink($transname);
1864: print $client "failed\n";
1865: } else {
1866: print $client "ok\n";
1867: }
1868: }
1869: } else {
1870: print $client "not_home\n";
1871: }
1872: } else {
1873: Reply($client, "refused\n", $userinput);
1874: }
1875: # --------------------------------------------------------- remove a user file
1876: } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.
1877: if(isClient) {
1878: my ($cmd,$fname)=split(/:/,$userinput);
1879: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
1880: &logthis("$udom - $uname - $ufile");
1881: if ($ufile =~m|/\.\./|) {
1882: # any files paths with /../ in them refuse
1883: # to deal with
1884: print $client "refused\n";
1885: } else {
1886: my $udir=propath($udom,$uname);
1887: if (-e $udir) {
1888: my $file=$udir.'/userfiles/'.$ufile;
1889: if (-e $file) {
1890: unlink($file);
1891: if (-e $file) {
1892: print $client "failed\n";
1893: } else {
1894: print $client "ok\n";
1895: }
1896: } else {
1897: print $client "not_found\n";
1898: }
1899: } else {
1900: print $client "not_home\n";
1901: }
1902: }
1903: } else {
1904: Reply($client, "refused\n", $userinput);
1905: }
1906: # ------------------------------------------ authenticate access to a user file
1907: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1908: if(isClient) {
1909: my ($cmd,$fname,$session)=split(/:/,$userinput);
1910: chomp($session);
1911: my $reply='non_auth';
1912: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1913: $session.'.id')) {
1914: while (my $line=<ENVIN>) {
1915: if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
1916: }
1917: close(ENVIN);
1918: print $client $reply."\n";
1919: } else {
1920: print $client "invalid_token\n";
1921: }
1922: } else {
1923: Reply($client, "refused\n", $userinput);
1924:
1925: }
1926: # ----------------------------------------------------------------- unsubscribe
1927: } elsif ($userinput =~ /^unsub/) {
1928: if(isClient) {
1929: my ($cmd,$fname)=split(/:/,$userinput);
1930: if (-e $fname) {
1931: print $client &unsub($fname,$clientip);
1932: } else {
1933: print $client "not_found\n";
1934: }
1935: } else {
1936: Reply($client, "refused\n", $userinput);
1937:
1938: }
1939: # ------------------------------------------------------------------- subscribe
1940: } elsif ($userinput =~ /^sub/) {
1941: if(isClient) {
1942: print $client &subscribe($userinput,$clientip);
1943: } else {
1944: Reply($client, "refused\n", $userinput);
1945:
1946: }
1947: # ------------------------------------------------------------- current version
1948: } elsif ($userinput =~ /^currentversion/) {
1949: if(isClient) {
1950: my ($cmd,$fname)=split(/:/,$userinput);
1951: print $client ¤tversion($fname)."\n";
1952: } else {
1953: Reply($client, "refused\n", $userinput);
1954:
1955: }
1956: # ------------------------------------------------------------------------- log
1957: } elsif ($userinput =~ /^log/) {
1958: if(isClient) {
1959: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1960: chomp($what);
1961: my $proname=propath($udom,$uname);
1962: my $now=time;
1963: {
1964: my $hfh;
1965: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1966: print $hfh "$now:$clientname:$what\n";
1967: print $client "ok\n";
1968: } else {
1969: print $client "error: ".($!+0)
1970: ." IO::File->new Failed "
1971: ."while attempting log\n";
1972: }
1973: }
1974: } else {
1975: Reply($client, "refused\n", $userinput);
1976:
1977: }
1978: # ------------------------------------------------------------------------- put
1979: } elsif ($userinput =~ /^put/) {
1980: if(isClient) {
1981: my ($cmd,$udom,$uname,$namespace,$what)
1982: =split(/:/,$userinput);
1983: $namespace=~s/\//\_/g;
1984: $namespace=~s/\W//g;
1985: if ($namespace ne 'roles') {
1986: chomp($what);
1987: my $proname=propath($udom,$uname);
1988: my $now=time;
1989: unless ($namespace=~/^nohist\_/) {
1990: my $hfh;
1991: if (
1992: $hfh=IO::File->new(">>$proname/$namespace.hist")
1993: ) { print $hfh "P:$now:$what\n"; }
1994: }
1995: my @pairs=split(/\&/,$what);
1996: my %hash;
1997: if (tie(%hash,'GDBM_File',
1998: "$proname/$namespace.db",
1999: &GDBM_WRCREAT(),0640)) {
2000: foreach my $pair (@pairs) {
2001: my ($key,$value)=split(/=/,$pair);
2002: $hash{$key}=$value;
2003: }
2004: if (untie(%hash)) {
2005: print $client "ok\n";
2006: } else {
2007: print $client "error: ".($!+0)
2008: ." untie(GDBM) failed ".
2009: "while attempting put\n";
2010: }
2011: } else {
2012: print $client "error: ".($!)
2013: ." tie(GDBM) Failed ".
2014: "while attempting put\n";
2015: }
2016: } else {
2017: print $client "refused\n";
2018: }
2019: } else {
2020: Reply($client, "refused\n", $userinput);
2021:
2022: }
2023: # ------------------------------------------------------------------- inc
2024: } elsif ($userinput =~ /^inc:/) {
2025: if(isClient) {
2026: my ($cmd,$udom,$uname,$namespace,$what)
2027: =split(/:/,$userinput);
2028: $namespace=~s/\//\_/g;
2029: $namespace=~s/\W//g;
2030: if ($namespace ne 'roles') {
2031: chomp($what);
2032: my $proname=propath($udom,$uname);
2033: my $now=time;
2034: unless ($namespace=~/^nohist\_/) {
2035: my $hfh;
2036: if (
2037: $hfh=IO::File->new(">>$proname/$namespace.hist")
2038: ) { print $hfh "P:$now:$what\n"; }
2039: }
2040: my @pairs=split(/\&/,$what);
2041: my %hash;
2042: if (tie(%hash,'GDBM_File',
2043: "$proname/$namespace.db",
2044: &GDBM_WRCREAT(),0640)) {
2045: foreach my $pair (@pairs) {
2046: my ($key,$value)=split(/=/,$pair);
2047: # We could check that we have a number...
2048: if (! defined($value) || $value eq '') {
2049: $value = 1;
2050: }
2051: $hash{$key}+=$value;
2052: }
2053: if (untie(%hash)) {
2054: print $client "ok\n";
2055: } else {
2056: print $client "error: ".($!+0)
2057: ." untie(GDBM) failed ".
2058: "while attempting inc\n";
2059: }
2060: } else {
2061: print $client "error: ".($!)
2062: ." tie(GDBM) Failed ".
2063: "while attempting inc\n";
2064: }
2065: } else {
2066: print $client "refused\n";
2067: }
2068: } else {
2069: Reply($client, "refused\n", $userinput);
2070:
2071: }
2072: # -------------------------------------------------------------------- rolesput
2073: } elsif ($userinput =~ /^rolesput/) {
2074: if(isClient) {
2075: &Debug("rolesput");
2076: if ($wasenc==1) {
2077: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2078: =split(/:/,$userinput);
2079: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2080: "user = ".$exeuser." udom=".$udom.
2081: "what = ".$what);
2082: my $namespace='roles';
2083: chomp($what);
2084: my $proname=propath($udom,$uname);
2085: my $now=time;
2086: {
2087: my $hfh;
2088: if (
2089: $hfh=IO::File->new(">>$proname/$namespace.hist")
2090: ) {
2091: print $hfh "P:$now:$exedom:$exeuser:$what\n";
2092: }
2093: }
2094: my @pairs=split(/\&/,$what);
2095: my %hash;
2096: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2097: foreach my $pair (@pairs) {
2098: my ($key,$value)=split(/=/,$pair);
2099: &ManagePermissions($key, $udom, $uname,
2100: &GetAuthType( $udom,
2101: $uname));
2102: $hash{$key}=$value;
2103: }
2104: if (untie(%hash)) {
2105: print $client "ok\n";
2106: } else {
2107: print $client "error: ".($!+0)
2108: ." untie(GDBM) Failed ".
2109: "while attempting rolesput\n";
2110: }
2111: } else {
2112: print $client "error: ".($!+0)
2113: ." tie(GDBM) Failed ".
2114: "while attempting rolesput\n";
2115: }
2116: } else {
2117: print $client "refused\n";
2118: }
2119: } else {
2120: Reply($client, "refused\n", $userinput);
2121:
2122: }
2123: # -------------------------------------------------------------------- rolesdel
2124: } elsif ($userinput =~ /^rolesdel/) {
2125: if(isClient) {
2126: &Debug("rolesdel");
2127: if ($wasenc==1) {
2128: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2129: =split(/:/,$userinput);
2130: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2131: "user = ".$exeuser." udom=".$udom.
2132: "what = ".$what);
2133: my $namespace='roles';
2134: chomp($what);
2135: my $proname=propath($udom,$uname);
2136: my $now=time;
2137: {
2138: my $hfh;
2139: if (
2140: $hfh=IO::File->new(">>$proname/$namespace.hist")
2141: ) {
2142: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2143: }
2144: }
2145: my @rolekeys=split(/\&/,$what);
2146: my %hash;
2147: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2148: foreach my $key (@rolekeys) {
2149: delete $hash{$key};
2150: }
2151: if (untie(%hash)) {
2152: print $client "ok\n";
2153: } else {
2154: print $client "error: ".($!+0)
2155: ." untie(GDBM) Failed ".
2156: "while attempting rolesdel\n";
2157: }
2158: } else {
2159: print $client "error: ".($!+0)
2160: ." tie(GDBM) Failed ".
2161: "while attempting rolesdel\n";
2162: }
2163: } else {
2164: print $client "refused\n";
2165: }
2166: } else {
2167: Reply($client, "refused\n", $userinput);
2168:
2169: }
2170: # ------------------------------------------------------------------------- get
2171: } elsif ($userinput =~ /^get/) {
2172: if(isClient) {
2173: my ($cmd,$udom,$uname,$namespace,$what)
2174: =split(/:/,$userinput);
2175: $namespace=~s/\//\_/g;
2176: $namespace=~s/\W//g;
2177: chomp($what);
2178: my @queries=split(/\&/,$what);
2179: my $proname=propath($udom,$uname);
2180: my $qresult='';
2181: my %hash;
2182: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2183: for (my $i=0;$i<=$#queries;$i++) {
2184: $qresult.="$hash{$queries[$i]}&";
2185: }
2186: if (untie(%hash)) {
2187: $qresult=~s/\&$//;
2188: print $client "$qresult\n";
2189: } else {
2190: print $client "error: ".($!+0)
2191: ." untie(GDBM) Failed ".
2192: "while attempting get\n";
2193: }
2194: } else {
2195: if ($!+0 == 2) {
2196: print $client "error:No such file or ".
2197: "GDBM reported bad block error\n";
2198: } else {
2199: print $client "error: ".($!+0)
2200: ." tie(GDBM) Failed ".
2201: "while attempting get\n";
2202: }
2203: }
2204: } else {
2205: Reply($client, "refused\n", $userinput);
2206:
2207: }
2208: # ------------------------------------------------------------------------ eget
2209: } elsif ($userinput =~ /^eget/) {
2210: if (isClient) {
2211: my ($cmd,$udom,$uname,$namespace,$what)
2212: =split(/:/,$userinput);
2213: $namespace=~s/\//\_/g;
2214: $namespace=~s/\W//g;
2215: chomp($what);
2216: my @queries=split(/\&/,$what);
2217: my $proname=propath($udom,$uname);
2218: my $qresult='';
2219: my %hash;
2220: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2221: for (my $i=0;$i<=$#queries;$i++) {
2222: $qresult.="$hash{$queries[$i]}&";
2223: }
2224: if (untie(%hash)) {
2225: $qresult=~s/\&$//;
2226: if ($cipher) {
2227: my $cmdlength=length($qresult);
2228: $qresult.=" ";
2229: my $encqresult='';
2230: for
2231: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2232: $encqresult.=
2233: unpack("H16",
2234: $cipher->encrypt(substr($qresult,$encidx,8)));
2235: }
2236: print $client "enc:$cmdlength:$encqresult\n";
2237: } else {
2238: print $client "error:no_key\n";
2239: }
2240: } else {
2241: print $client "error: ".($!+0)
2242: ." untie(GDBM) Failed ".
2243: "while attempting eget\n";
2244: }
2245: } else {
2246: print $client "error: ".($!+0)
2247: ." tie(GDBM) Failed ".
2248: "while attempting eget\n";
2249: }
2250: } else {
2251: Reply($client, "refused\n", $userinput);
2252:
2253: }
2254: # ------------------------------------------------------------------------- del
2255: } elsif ($userinput =~ /^del/) {
2256: if(isClient) {
2257: my ($cmd,$udom,$uname,$namespace,$what)
2258: =split(/:/,$userinput);
2259: $namespace=~s/\//\_/g;
2260: $namespace=~s/\W//g;
2261: chomp($what);
2262: my $proname=propath($udom,$uname);
2263: my $now=time;
2264: unless ($namespace=~/^nohist\_/) {
2265: my $hfh;
2266: if (
2267: $hfh=IO::File->new(">>$proname/$namespace.hist")
2268: ) { print $hfh "D:$now:$what\n"; }
2269: }
2270: my @keys=split(/\&/,$what);
2271: my %hash;
2272: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2273: foreach my $key (@keys) {
2274: delete($hash{$key});
2275: }
2276: if (untie(%hash)) {
2277: print $client "ok\n";
2278: } else {
2279: print $client "error: ".($!+0)
2280: ." untie(GDBM) Failed ".
2281: "while attempting del\n";
2282: }
2283: } else {
2284: print $client "error: ".($!+0)
2285: ." tie(GDBM) Failed ".
2286: "while attempting del\n";
2287: }
2288: } else {
2289: Reply($client, "refused\n", $userinput);
2290:
2291: }
2292: # ------------------------------------------------------------------------ keys
2293: } elsif ($userinput =~ /^keys/) {
2294: if(isClient) {
2295: my ($cmd,$udom,$uname,$namespace)
2296: =split(/:/,$userinput);
2297: $namespace=~s/\//\_/g;
2298: $namespace=~s/\W//g;
2299: my $proname=propath($udom,$uname);
2300: my $qresult='';
2301: my %hash;
2302: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2303: foreach my $key (keys %hash) {
2304: $qresult.="$key&";
2305: }
2306: if (untie(%hash)) {
2307: $qresult=~s/\&$//;
2308: print $client "$qresult\n";
2309: } else {
2310: print $client "error: ".($!+0)
2311: ." untie(GDBM) Failed ".
2312: "while attempting keys\n";
2313: }
2314: } else {
2315: print $client "error: ".($!+0)
2316: ." tie(GDBM) Failed ".
2317: "while attempting keys\n";
2318: }
2319: } else {
2320: Reply($client, "refused\n", $userinput);
2321:
2322: }
2323: # ----------------------------------------------------------------- dumpcurrent
2324: } elsif ($userinput =~ /^currentdump/) {
2325: if (isClient) {
2326: my ($cmd,$udom,$uname,$namespace)
2327: =split(/:/,$userinput);
2328: $namespace=~s/\//\_/g;
2329: $namespace=~s/\W//g;
2330: my $qresult='';
2331: my $proname=propath($udom,$uname);
2332: my %hash;
2333: if (tie(%hash,'GDBM_File',
2334: "$proname/$namespace.db",
2335: &GDBM_READER(),0640)) {
2336: # Structure of %data:
2337: # $data{$symb}->{$parameter}=$value;
2338: # $data{$symb}->{'v.'.$parameter}=$version;
2339: # since $parameter will be unescaped, we do not
2340: # have to worry about silly parameter names...
2341: my %data = ();
2342: while (my ($key,$value) = each(%hash)) {
2343: my ($v,$symb,$param) = split(/:/,$key);
2344: next if ($v eq 'version' || $symb eq 'keys');
2345: next if (exists($data{$symb}) &&
2346: exists($data{$symb}->{$param}) &&
2347: $data{$symb}->{'v.'.$param} > $v);
2348: $data{$symb}->{$param}=$value;
2349: $data{$symb}->{'v.'.$param}=$v;
2350: }
2351: if (untie(%hash)) {
2352: while (my ($symb,$param_hash) = each(%data)) {
2353: while(my ($param,$value) = each (%$param_hash)){
2354: next if ($param =~ /^v\./);
2355: $qresult.=$symb.':'.$param.'='.$value.'&';
2356: }
2357: }
2358: chop($qresult);
2359: print $client "$qresult\n";
2360: } else {
2361: print $client "error: ".($!+0)
2362: ." untie(GDBM) Failed ".
2363: "while attempting currentdump\n";
2364: }
2365: } else {
2366: print $client "error: ".($!+0)
2367: ." tie(GDBM) Failed ".
2368: "while attempting currentdump\n";
2369: }
2370: } else {
2371: Reply($client, "refused\n", $userinput);
2372: }
2373: # ------------------------------------------------------------------------ dump
2374: } elsif ($userinput =~ /^dump/) {
2375: if(isClient) {
2376: my ($cmd,$udom,$uname,$namespace,$regexp)
2377: =split(/:/,$userinput);
2378: $namespace=~s/\//\_/g;
2379: $namespace=~s/\W//g;
2380: if (defined($regexp)) {
2381: $regexp=&unescape($regexp);
2382: } else {
2383: $regexp='.';
2384: }
2385: my $qresult='';
2386: my $proname=propath($udom,$uname);
2387: my %hash;
2388: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2389: while (my ($key,$value) = each(%hash)) {
2390: if ($regexp eq '.') {
2391: $qresult.=$key.'='.$value.'&';
2392: } else {
2393: my $unescapeKey = &unescape($key);
2394: if (eval('$unescapeKey=~/$regexp/')) {
2395: $qresult.="$key=$value&";
2396: }
2397: }
2398: }
2399: if (untie(%hash)) {
2400: chop($qresult);
2401: print $client "$qresult\n";
2402: } else {
2403: print $client "error: ".($!+0)
2404: ." untie(GDBM) Failed ".
2405: "while attempting dump\n";
2406: }
2407: } else {
2408: print $client "error: ".($!+0)
2409: ." tie(GDBM) Failed ".
2410: "while attempting dump\n";
2411: }
2412: } else {
2413: Reply($client, "refused\n", $userinput);
2414:
2415: }
2416: # ----------------------------------------------------------------------- store
2417: } elsif ($userinput =~ /^store/) {
2418: if(isClient) {
2419: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2420: =split(/:/,$userinput);
2421: $namespace=~s/\//\_/g;
2422: $namespace=~s/\W//g;
2423: if ($namespace ne 'roles') {
2424: chomp($what);
2425: my $proname=propath($udom,$uname);
2426: my $now=time;
2427: unless ($namespace=~/^nohist\_/) {
2428: my $hfh;
2429: if (
2430: $hfh=IO::File->new(">>$proname/$namespace.hist")
2431: ) { print $hfh "P:$now:$rid:$what\n"; }
2432: }
2433: my @pairs=split(/\&/,$what);
2434: my %hash;
2435: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2436: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2437: my $key;
2438: $hash{"version:$rid"}++;
2439: my $version=$hash{"version:$rid"};
2440: my $allkeys='';
2441: foreach my $pair (@pairs) {
2442: my ($key,$value)=split(/=/,$pair);
2443: $allkeys.=$key.':';
2444: $hash{"$version:$rid:$key"}=$value;
2445: }
2446: $hash{"$version:$rid:timestamp"}=$now;
2447: $allkeys.='timestamp';
2448: $hash{"$version:keys:$rid"}=$allkeys;
2449: if (untie(%hash)) {
2450: print $client "ok\n";
2451: } else {
2452: print $client "error: ".($!+0)
2453: ." untie(GDBM) Failed ".
2454: "while attempting store\n";
2455: }
2456: } else {
2457: print $client "error: ".($!+0)
2458: ." tie(GDBM) Failed ".
2459: "while attempting store\n";
2460: }
2461: } else {
2462: print $client "refused\n";
2463: }
2464: } else {
2465: Reply($client, "refused\n", $userinput);
2466:
2467: }
2468: # --------------------------------------------------------------------- restore
2469: } elsif ($userinput =~ /^restore/) {
2470: if(isClient) {
2471: my ($cmd,$udom,$uname,$namespace,$rid)
2472: =split(/:/,$userinput);
2473: $namespace=~s/\//\_/g;
2474: $namespace=~s/\W//g;
2475: chomp($rid);
2476: my $proname=propath($udom,$uname);
2477: my $qresult='';
2478: my %hash;
2479: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2480: my $version=$hash{"version:$rid"};
2481: $qresult.="version=$version&";
2482: my $scope;
2483: for ($scope=1;$scope<=$version;$scope++) {
2484: my $vkeys=$hash{"$scope:keys:$rid"};
2485: my @keys=split(/:/,$vkeys);
2486: my $key;
2487: $qresult.="$scope:keys=$vkeys&";
2488: foreach $key (@keys) {
2489: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2490: }
2491: }
2492: if (untie(%hash)) {
2493: $qresult=~s/\&$//;
2494: print $client "$qresult\n";
2495: } else {
2496: print $client "error: ".($!+0)
2497: ." untie(GDBM) Failed ".
2498: "while attempting restore\n";
2499: }
2500: } else {
2501: print $client "error: ".($!+0)
2502: ." tie(GDBM) Failed ".
2503: "while attempting restore\n";
2504: }
2505: } else {
2506: Reply($client, "refused\n", $userinput);
2507:
2508: }
2509: # -------------------------------------------------------------------- chatsend
2510: } elsif ($userinput =~ /^chatsend/) {
2511: if(isClient) {
2512: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2513: &chatadd($cdom,$cnum,$newpost);
2514: print $client "ok\n";
2515: } else {
2516: Reply($client, "refused\n", $userinput);
2517:
2518: }
2519: # -------------------------------------------------------------------- chatretr
2520: } elsif ($userinput =~ /^chatretr/) {
2521: if(isClient) {
2522: my
2523: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2524: my $reply='';
2525: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2526: $reply.=&escape($_).':';
2527: }
2528: $reply=~s/\:$//;
2529: print $client $reply."\n";
2530: } else {
2531: Reply($client, "refused\n", $userinput);
2532:
2533: }
2534: # ------------------------------------------------------------------- querysend
2535: } elsif ($userinput =~ /^querysend/) {
2536: if (isClient) {
2537: my ($cmd,$query,
2538: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2539: $query=~s/\n*$//g;
2540: print $client "".
2541: sqlreply("$clientname\&$query".
2542: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2543: } else {
2544: Reply($client, "refused\n", $userinput);
2545:
2546: }
2547: # ------------------------------------------------------------------ queryreply
2548: } elsif ($userinput =~ /^queryreply/) {
2549: if(isClient) {
2550: my ($cmd,$id,$reply)=split(/:/,$userinput);
2551: my $store;
2552: my $execdir=$perlvar{'lonDaemons'};
2553: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2554: $reply=~s/\&/\n/g;
2555: print $store $reply;
2556: close $store;
2557: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2558: print $store2 "done\n";
2559: close $store2;
2560: print $client "ok\n";
2561: }
2562: else {
2563: print $client "error: ".($!+0)
2564: ." IO::File->new Failed ".
2565: "while attempting queryreply\n";
2566: }
2567: } else {
2568: Reply($client, "refused\n", $userinput);
2569:
2570: }
2571: # ----------------------------------------------------------------- courseidput
2572: } elsif ($userinput =~ /^courseidput/) {
2573: if(isClient) {
2574: my ($cmd,$udom,$what)=split(/:/,$userinput);
2575: chomp($what);
2576: $udom=~s/\W//g;
2577: my $proname=
2578: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2579: my $now=time;
2580: my @pairs=split(/\&/,$what);
2581: my %hash;
2582: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2583: foreach my $pair (@pairs) {
2584: my ($key,$value)=split(/=/,$pair);
2585: $hash{$key}=$value.':'.$now;
2586: }
2587: if (untie(%hash)) {
2588: print $client "ok\n";
2589: } else {
2590: print $client "error: ".($!+0)
2591: ." untie(GDBM) Failed ".
2592: "while attempting courseidput\n";
2593: }
2594: } else {
2595: print $client "error: ".($!+0)
2596: ." tie(GDBM) Failed ".
2597: "while attempting courseidput\n";
2598: }
2599: } else {
2600: Reply($client, "refused\n", $userinput);
2601:
2602: }
2603: # ---------------------------------------------------------------- courseiddump
2604: } elsif ($userinput =~ /^courseiddump/) {
2605: if(isClient) {
2606: my ($cmd,$udom,$since,$description)
2607: =split(/:/,$userinput);
2608: if (defined($description)) {
2609: $description=&unescape($description);
2610: } else {
2611: $description='.';
2612: }
2613: unless (defined($since)) { $since=0; }
2614: my $qresult='';
2615: my $proname=
2616: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2617: my %hash;
2618: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2619: while (my ($key,$value) = each(%hash)) {
2620: my ($descr,$lasttime)=split(/\:/,$value);
2621: if ($lasttime<$since) { next; }
2622: if ($description eq '.') {
2623: $qresult.=$key.'='.$descr.'&';
2624: } else {
2625: my $unescapeVal = &unescape($descr);
2626: if (eval('$unescapeVal=~/\Q$description\E/i')) {
2627: $qresult.="$key=$descr&";
2628: }
2629: }
2630: }
2631: if (untie(%hash)) {
2632: chop($qresult);
2633: print $client "$qresult\n";
2634: } else {
2635: print $client "error: ".($!+0)
2636: ." untie(GDBM) Failed ".
2637: "while attempting courseiddump\n";
2638: }
2639: } else {
2640: print $client "error: ".($!+0)
2641: ." tie(GDBM) Failed ".
2642: "while attempting courseiddump\n";
2643: }
2644: } else {
2645: Reply($client, "refused\n", $userinput);
2646:
2647: }
2648: # ----------------------------------------------------------------------- idput
2649: } elsif ($userinput =~ /^idput/) {
2650: if(isClient) {
2651: my ($cmd,$udom,$what)=split(/:/,$userinput);
2652: chomp($what);
2653: $udom=~s/\W//g;
2654: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2655: my $now=time;
2656: {
2657: my $hfh;
2658: if (
2659: $hfh=IO::File->new(">>$proname.hist")
2660: ) { print $hfh "P:$now:$what\n"; }
2661: }
2662: my @pairs=split(/\&/,$what);
2663: my %hash;
2664: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2665: foreach my $pair (@pairs) {
2666: my ($key,$value)=split(/=/,$pair);
2667: $hash{$key}=$value;
2668: }
2669: if (untie(%hash)) {
2670: print $client "ok\n";
2671: } else {
2672: print $client "error: ".($!+0)
2673: ." untie(GDBM) Failed ".
2674: "while attempting idput\n";
2675: }
2676: } else {
2677: print $client "error: ".($!+0)
2678: ." tie(GDBM) Failed ".
2679: "while attempting idput\n";
2680: }
2681: } else {
2682: Reply($client, "refused\n", $userinput);
2683:
2684: }
2685: # ----------------------------------------------------------------------- idget
2686: } elsif ($userinput =~ /^idget/) {
2687: if(isClient) {
2688: my ($cmd,$udom,$what)=split(/:/,$userinput);
2689: chomp($what);
2690: $udom=~s/\W//g;
2691: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2692: my @queries=split(/\&/,$what);
2693: my $qresult='';
2694: my %hash;
2695: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2696: for (my $i=0;$i<=$#queries;$i++) {
2697: $qresult.="$hash{$queries[$i]}&";
2698: }
2699: if (untie(%hash)) {
2700: $qresult=~s/\&$//;
2701: print $client "$qresult\n";
2702: } else {
2703: print $client "error: ".($!+0)
2704: ." untie(GDBM) Failed ".
2705: "while attempting idget\n";
2706: }
2707: } else {
2708: print $client "error: ".($!+0)
2709: ." tie(GDBM) Failed ".
2710: "while attempting idget\n";
2711: }
2712: } else {
2713: Reply($client, "refused\n", $userinput);
2714:
2715: }
2716: # ---------------------------------------------------------------------- tmpput
2717: } elsif ($userinput =~ /^tmpput/) {
2718: if(isClient) {
2719: my ($cmd,$what)=split(/:/,$userinput);
2720: my $store;
2721: $tmpsnum++;
2722: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2723: $id=~s/\W/\_/g;
2724: $what=~s/\n//g;
2725: my $execdir=$perlvar{'lonDaemons'};
2726: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2727: print $store $what;
2728: close $store;
2729: print $client "$id\n";
2730: }
2731: else {
2732: print $client "error: ".($!+0)
2733: ."IO::File->new Failed ".
2734: "while attempting tmpput\n";
2735: }
2736: } else {
2737: Reply($client, "refused\n", $userinput);
2738:
2739: }
2740:
2741: # ---------------------------------------------------------------------- tmpget
2742: } elsif ($userinput =~ /^tmpget/) {
2743: if(isClient) {
2744: my ($cmd,$id)=split(/:/,$userinput);
2745: chomp($id);
2746: $id=~s/\W/\_/g;
2747: my $store;
2748: my $execdir=$perlvar{'lonDaemons'};
2749: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2750: my $reply=<$store>;
2751: print $client "$reply\n";
2752: close $store;
2753: }
2754: else {
2755: print $client "error: ".($!+0)
2756: ."IO::File->new Failed ".
2757: "while attempting tmpget\n";
2758: }
2759: } else {
2760: Reply($client, "refused\n", $userinput);
2761:
2762: }
2763: # ---------------------------------------------------------------------- tmpdel
2764: } elsif ($userinput =~ /^tmpdel/) {
2765: if(isClient) {
2766: my ($cmd,$id)=split(/:/,$userinput);
2767: chomp($id);
2768: $id=~s/\W/\_/g;
2769: my $execdir=$perlvar{'lonDaemons'};
2770: if (unlink("$execdir/tmp/$id.tmp")) {
2771: print $client "ok\n";
2772: } else {
2773: print $client "error: ".($!+0)
2774: ."Unlink tmp Failed ".
2775: "while attempting tmpdel\n";
2776: }
2777: } else {
2778: Reply($client, "refused\n", $userinput);
2779:
2780: }
2781: # -------------------------------------------------------------------------- ls
2782: } elsif ($userinput =~ /^ls/) {
2783: if(isClient) {
2784: my $obs;
2785: my $rights;
2786: my ($cmd,$ulsdir)=split(/:/,$userinput);
2787: my $ulsout='';
2788: my $ulsfn;
2789: if (-e $ulsdir) {
2790: if(-d $ulsdir) {
2791: if (opendir(LSDIR,$ulsdir)) {
2792: while ($ulsfn=readdir(LSDIR)) {
2793: undef $obs, $rights;
2794: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2795: #We do some obsolete checking here
2796: if(-e $ulsdir.'/'.$ulsfn.".meta") {
2797: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
2798: my @obsolete=<FILE>;
2799: foreach my $obsolete (@obsolete) {
2800: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
2801: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
2802: }
2803: }
2804: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
2805: if($obs eq '1') { $ulsout.="&1"; }
2806: else { $ulsout.="&0"; }
2807: if($rights eq '1') { $ulsout.="&1:"; }
2808: else { $ulsout.="&0:"; }
2809: }
2810: closedir(LSDIR);
2811: }
2812: } else {
2813: my @ulsstats=stat($ulsdir);
2814: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2815: }
2816: } else {
2817: $ulsout='no_such_dir';
2818: }
2819: if ($ulsout eq '') { $ulsout='empty'; }
2820: print $client "$ulsout\n";
2821: } else {
2822: Reply($client, "refused\n", $userinput);
2823:
2824: }
2825: # ----------------------------------------------------------------- setannounce
2826: } elsif ($userinput =~ /^setannounce/) {
2827: if (isClient) {
2828: my ($cmd,$announcement)=split(/:/,$userinput);
2829: chomp($announcement);
2830: $announcement=&unescape($announcement);
2831: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2832: '/announcement.txt')) {
2833: print $store $announcement;
2834: close $store;
2835: print $client "ok\n";
2836: } else {
2837: print $client "error: ".($!+0)."\n";
2838: }
2839: } else {
2840: Reply($client, "refused\n", $userinput);
2841:
2842: }
2843: # ------------------------------------------------------------------ Hanging up
2844: } elsif (($userinput =~ /^exit/) ||
2845: ($userinput =~ /^init/)) { # no restrictions.
2846: &logthis(
2847: "Client $clientip ($clientname) hanging up: $userinput");
2848: print $client "bye\n";
2849: $client->shutdown(2); # shutdown the socket forcibly.
2850: $client->close();
2851: last;
2852:
2853: # ---------------------------------- set current host/domain
2854: } elsif ($userinput =~ /^sethost:/) {
2855: if (isClient) {
2856: print $client &sethost($userinput)."\n";
2857: } else {
2858: print $client "refused\n";
2859: }
2860: #---------------------------------- request file (?) version.
2861: } elsif ($userinput =~/^version:/) {
2862: if (isClient) {
2863: print $client &version($userinput)."\n";
2864: } else {
2865: print $client "refused\n";
2866: }
2867: #------------------------------- is auto-enrollment enabled?
2868: } elsif ($userinput =~/^autorun/) {
2869: if (isClient) {
2870: my $outcome = &localenroll::run();
2871: print $client "$outcome\n";
2872: } else {
2873: print $client "0\n";
2874: }
2875: #------------------------------- get official sections (for auto-enrollment).
2876: } elsif ($userinput =~/^autogetsections/) {
2877: if (isClient) {
2878: my ($cmd,$coursecode)=split(/:/,$userinput);
2879: my @secs = &localenroll::get_sections($coursecode);
2880: my $seclist = &escape(join(':',@secs));
2881: print $client "$seclist\n";
2882: } else {
2883: print $client "refused\n";
2884: }
2885: #----------------------- validate owner of new course section (for auto-enrollment).
2886: } elsif ($userinput =~/^autonewcourse/) {
2887: if (isClient) {
2888: my ($cmd,$course_id,$owner)=split(/:/,$userinput);
2889: my $outcome = &localenroll::new_course($course_id,$owner);
2890: print $client "$outcome\n";
2891: } else {
2892: print $client "refused\n";
2893: }
2894: #-------------- validate course section in schedule of classes (for auto-enrollment).
2895: } elsif ($userinput =~/^autovalidatecourse/) {
2896: if (isClient) {
2897: my ($cmd,$course_id)=split(/:/,$userinput);
2898: my $outcome=&localenroll::validate_courseID($course_id);
2899: print $client "$outcome\n";
2900: } else {
2901: print $client "refused\n";
2902: }
2903: #--------------------------- create password for new user (for auto-enrollment).
2904: } elsif ($userinput =~/^autocreatepassword/) {
2905: if (isClient) {
2906: my ($cmd,$authparam)=split(/:/,$userinput);
2907: my ($create_passwd,$authchk) = @_;
2908: ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam);
2909: print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
2910: } else {
2911: print $client "refused\n";
2912: }
2913: #--------------------------- read and remove temporary files (for auto-enrollment).
2914: } elsif ($userinput =~/^autoretrieve/) {
2915: if (isClient) {
2916: my ($cmd,$filename) = split(/:/,$userinput);
2917: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
2918: if ( (-e $source) && ($filename ne '') ) {
2919: my $reply = '';
2920: if (open(my $fh,$source)) {
2921: while (<$fh>) {
2922: chomp($_);
2923: $_ =~ s/^\s+//g;
2924: $_ =~ s/\s+$//g;
2925: $reply .= $_;
2926: }
2927: close($fh);
2928: print $client &escape($reply)."\n";
2929: # unlink($source);
2930: } else {
2931: print $client "error\n";
2932: }
2933: } else {
2934: print $client "error\n";
2935: }
2936: } else {
2937: print $client "refused\n";
2938: }
2939: # ------------------------------------------------------------- unknown command
2940:
2941: } else {
2942: # unknown command
2943: print $client "unknown_cmd\n";
2944: }
2945: # -------------------------------------------------------------------- complete
2946: alarm(0);
2947: &status('Listening to '.$clientname);
2948: }
2949: # --------------------------------------------- client unknown or fishy, refuse
2950: } else {
2951: print $client "refused\n";
2952: $client->close();
2953: &logthis("<font color='blue'>WARNING: "
2954: ."Rejected client $clientip, closing connection</font>");
2955: }
2956: }
2957:
2958: # =============================================================================
2959:
2960: &logthis("<font color='red'>CRITICAL: "
2961: ."Disconnect from $clientip ($clientname)</font>");
2962:
2963:
2964: # this exit is VERY important, otherwise the child will become
2965: # a producer of more and more children, forking yourself into
2966: # process death.
2967: exit;
2968:
2969: }
2970:
2971:
2972: #
2973: # Checks to see if the input roleput request was to set
2974: # an author role. If so, invokes the lchtmldir script to set
2975: # up a correct public_html
2976: # Parameters:
2977: # request - The request sent to the rolesput subchunk.
2978: # We're looking for /domain/_au
2979: # domain - The domain in which the user is having roles doctored.
2980: # user - Name of the user for which the role is being put.
2981: # authtype - The authentication type associated with the user.
2982: #
2983: sub ManagePermissions
2984: {
2985:
2986: my ($request, $domain, $user, $authtype) = @_;
2987:
2988: # See if the request is of the form /$domain/_au
2989: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
2990: my $execdir = $perlvar{'lonDaemons'};
2991: my $userhome= "/home/$user" ;
2992: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
2993: system("$execdir/lchtmldir $userhome $user $authtype");
2994: }
2995: }
2996: #
2997: # GetAuthType - Determines the authorization type of a user in a domain.
2998:
2999: # Returns the authorization type or nouser if there is no such user.
3000: #
3001: sub GetAuthType
3002: {
3003:
3004: my ($domain, $user) = @_;
3005:
3006: Debug("GetAuthType( $domain, $user ) \n");
3007: my $proname = &propath($domain, $user);
3008: my $passwdfile = "$proname/passwd";
3009: if( -e $passwdfile ) {
3010: my $pf = IO::File->new($passwdfile);
3011: my $realpassword = <$pf>;
3012: chomp($realpassword);
3013: Debug("Password info = $realpassword\n");
3014: my ($authtype, $contentpwd) = split(/:/, $realpassword);
3015: Debug("Authtype = $authtype, content = $contentpwd\n");
3016: my $availinfo = '';
3017: if($authtype eq 'krb4' or $authtype eq 'krb5') {
3018: $availinfo = $contentpwd;
3019: }
3020:
3021: return "$authtype:$availinfo";
3022: }
3023: else {
3024: Debug("Returning nouser");
3025: return "nouser";
3026: }
3027: }
3028:
3029: sub addline {
3030: my ($fname,$hostid,$ip,$newline)=@_;
3031: my $contents;
3032: my $found=0;
3033: my $expr='^'.$hostid.':'.$ip.':';
3034: $expr =~ s/\./\\\./g;
3035: my $sh;
3036: if ($sh=IO::File->new("$fname.subscription")) {
3037: while (my $subline=<$sh>) {
3038: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
3039: }
3040: $sh->close();
3041: }
3042: $sh=IO::File->new(">$fname.subscription");
3043: if ($contents) { print $sh $contents; }
3044: if ($newline) { print $sh $newline; }
3045: $sh->close();
3046: return $found;
3047: }
3048:
3049: sub getchat {
3050: my ($cdom,$cname,$udom,$uname)=@_;
3051: my %hash;
3052: my $proname=&propath($cdom,$cname);
3053: my @entries=();
3054: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3055: &GDBM_READER(),0640)) {
3056: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3057: untie %hash;
3058: }
3059: my @participants=();
3060: my $cutoff=time-60;
3061: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
3062: &GDBM_WRCREAT(),0640)) {
3063: $hash{$uname.':'.$udom}=time;
3064: foreach (sort keys %hash) {
3065: if ($hash{$_}>$cutoff) {
3066: $participants[$#participants+1]='active_participant:'.$_;
3067: }
3068: }
3069: untie %hash;
3070: }
3071: return (@participants,@entries);
3072: }
3073:
3074: sub chatadd {
3075: my ($cdom,$cname,$newchat)=@_;
3076: my %hash;
3077: my $proname=&propath($cdom,$cname);
3078: my @entries=();
3079: my $time=time;
3080: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
3081: &GDBM_WRCREAT(),0640)) {
3082: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
3083: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
3084: my ($thentime,$idnum)=split(/\_/,$lastid);
3085: my $newid=$time.'_000000';
3086: if ($thentime==$time) {
3087: $idnum=~s/^0+//;
3088: $idnum++;
3089: $idnum=substr('000000'.$idnum,-6,6);
3090: $newid=$time.'_'.$idnum;
3091: }
3092: $hash{$newid}=$newchat;
3093: my $expired=$time-3600;
3094: foreach (keys %hash) {
3095: my ($thistime)=($_=~/(\d+)\_/);
3096: if ($thistime<$expired) {
3097: delete $hash{$_};
3098: }
3099: }
3100: untie %hash;
3101: }
3102: {
3103: my $hfh;
3104: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
3105: print $hfh "$time:".&unescape($newchat)."\n";
3106: }
3107: }
3108: }
3109:
3110: sub unsub {
3111: my ($fname,$clientip)=@_;
3112: my $result;
3113: my $unsubs = 0; # Number of successful unsubscribes:
3114:
3115:
3116: # An old way subscriptions were handled was to have a
3117: # subscription marker file:
3118:
3119: Debug("Attempting unlink of $fname.$clientname");
3120: if (unlink("$fname.$clientname")) {
3121: $unsubs++; # Successful unsub via marker file.
3122: }
3123:
3124: # The more modern way to do it is to have a subscription list
3125: # file:
3126:
3127: if (-e "$fname.subscription") {
3128: my $found=&addline($fname,$clientname,$clientip,'');
3129: if ($found) {
3130: $unsubs++;
3131: }
3132: }
3133:
3134: # If either or both of these mechanisms succeeded in unsubscribing a
3135: # resource we can return ok:
3136:
3137: if($unsubs) {
3138: $result = "ok\n";
3139: } else {
3140: $result = "not_subscribed\n";
3141: }
3142:
3143: return $result;
3144: }
3145:
3146: sub currentversion {
3147: my $fname=shift;
3148: my $version=-1;
3149: my $ulsdir='';
3150: if ($fname=~/^(.+)\/[^\/]+$/) {
3151: $ulsdir=$1;
3152: }
3153: my ($fnamere1,$fnamere2);
3154: # remove version if already specified
3155: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
3156: # get the bits that go before and after the version number
3157: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
3158: $fnamere1=$1;
3159: $fnamere2='.'.$2;
3160: }
3161: if (-e $fname) { $version=1; }
3162: if (-e $ulsdir) {
3163: if(-d $ulsdir) {
3164: if (opendir(LSDIR,$ulsdir)) {
3165: my $ulsfn;
3166: while ($ulsfn=readdir(LSDIR)) {
3167: # see if this is a regular file (ignore links produced earlier)
3168: my $thisfile=$ulsdir.'/'.$ulsfn;
3169: unless (-l $thisfile) {
3170: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
3171: if ($1>$version) { $version=$1; }
3172: }
3173: }
3174: }
3175: closedir(LSDIR);
3176: $version++;
3177: }
3178: }
3179: }
3180: return $version;
3181: }
3182:
3183: sub thisversion {
3184: my $fname=shift;
3185: my $version=-1;
3186: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
3187: $version=$1;
3188: }
3189: return $version;
3190: }
3191:
3192: sub subscribe {
3193: my ($userinput,$clientip)=@_;
3194: my $result;
3195: my ($cmd,$fname)=split(/:/,$userinput);
3196: my $ownership=&ishome($fname);
3197: if ($ownership eq 'owner') {
3198: # explitly asking for the current version?
3199: unless (-e $fname) {
3200: my $currentversion=¤tversion($fname);
3201: if (&thisversion($fname)==$currentversion) {
3202: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
3203: my $root=$1;
3204: my $extension=$2;
3205: symlink($root.'.'.$extension,
3206: $root.'.'.$currentversion.'.'.$extension);
3207: unless ($extension=~/\.meta$/) {
3208: symlink($root.'.'.$extension.'.meta',
3209: $root.'.'.$currentversion.'.'.$extension.'.meta');
3210: }
3211: }
3212: }
3213: }
3214: if (-e $fname) {
3215: if (-d $fname) {
3216: $result="directory\n";
3217: } else {
3218: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
3219: my $now=time;
3220: my $found=&addline($fname,$clientname,$clientip,
3221: "$clientname:$clientip:$now\n");
3222: if ($found) { $result="$fname\n"; }
3223: # if they were subscribed to only meta data, delete that
3224: # subscription, when you subscribe to a file you also get
3225: # the metadata
3226: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
3227: $fname=~s/\/home\/httpd\/html\/res/raw/;
3228: $fname="http://$thisserver/".$fname;
3229: $result="$fname\n";
3230: }
3231: } else {
3232: $result="not_found\n";
3233: }
3234: } else {
3235: $result="rejected\n";
3236: }
3237: return $result;
3238: }
3239:
3240: sub make_passwd_file {
3241: my ($uname, $umode,$npass,$passfilename)=@_;
3242: my $result="ok\n";
3243: if ($umode eq 'krb4' or $umode eq 'krb5') {
3244: {
3245: my $pf = IO::File->new(">$passfilename");
3246: print $pf "$umode:$npass\n";
3247: }
3248: } elsif ($umode eq 'internal') {
3249: my $salt=time;
3250: $salt=substr($salt,6,2);
3251: my $ncpass=crypt($npass,$salt);
3252: {
3253: &Debug("Creating internal auth");
3254: my $pf = IO::File->new(">$passfilename");
3255: print $pf "internal:$ncpass\n";
3256: }
3257: } elsif ($umode eq 'localauth') {
3258: {
3259: my $pf = IO::File->new(">$passfilename");
3260: print $pf "localauth:$npass\n";
3261: }
3262: } elsif ($umode eq 'unix') {
3263: {
3264: #
3265: # Don't allow the creation of privileged accounts!!! that would
3266: # be real bad!!!
3267: #
3268: my $uid = getpwnam($uname);
3269: if((defined $uid) && ($uid == 0)) {
3270: &logthis(">>>Attempted to create privilged account blocked");
3271: return "no_priv_account_error\n";
3272: }
3273:
3274: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
3275: {
3276: &Debug("Executing external: ".$execpath);
3277: &Debug("user = ".$uname.", Password =". $npass);
3278: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
3279: print $se "$uname\n";
3280: print $se "$npass\n";
3281: print $se "$npass\n";
3282: }
3283: my $useraddok = $?;
3284: if($useraddok > 0) {
3285: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
3286: }
3287: my $pf = IO::File->new(">$passfilename");
3288: print $pf "unix:\n";
3289: }
3290: } elsif ($umode eq 'none') {
3291: {
3292: my $pf = IO::File->new(">$passfilename");
3293: print $pf "none:\n";
3294: }
3295: } else {
3296: $result="auth_mode_error\n";
3297: }
3298: return $result;
3299: }
3300:
3301: sub sethost {
3302: my ($remotereq) = @_;
3303: my (undef,$hostid)=split(/:/,$remotereq);
3304: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
3305: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
3306: $currenthostid=$hostid;
3307: $currentdomainid=$hostdom{$hostid};
3308: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
3309: } else {
3310: &logthis("Requested host id $hostid not an alias of ".
3311: $perlvar{'lonHostID'}." refusing connection");
3312: return 'unable_to_set';
3313: }
3314: return 'ok';
3315: }
3316:
3317: sub version {
3318: my ($userinput)=@_;
3319: $remoteVERSION=(split(/:/,$userinput))[1];
3320: return "version:$VERSION";
3321: }
3322:
3323: #There is a copy of this in lonnet.pm
3324: sub userload {
3325: my $numusers=0;
3326: {
3327: opendir(LONIDS,$perlvar{'lonIDsDir'});
3328: my $filename;
3329: my $curtime=time;
3330: while ($filename=readdir(LONIDS)) {
3331: if ($filename eq '.' || $filename eq '..') {next;}
3332: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
3333: if ($curtime-$mtime < 1800) { $numusers++; }
3334: }
3335: closedir(LONIDS);
3336: }
3337: my $userloadpercent=0;
3338: my $maxuserload=$perlvar{'lonUserLoadLim'};
3339: if ($maxuserload) {
3340: $userloadpercent=100*$numusers/$maxuserload;
3341: }
3342: $userloadpercent=sprintf("%.2f",$userloadpercent);
3343: return $userloadpercent;
3344: }
3345:
3346: # ----------------------------------- POD (plain old documentation, CPAN style)
3347:
3348: =head1 NAME
3349:
3350: lond - "LON Daemon" Server (port "LOND" 5663)
3351:
3352: =head1 SYNOPSIS
3353:
3354: Usage: B<lond>
3355:
3356: Should only be run as user=www. This is a command-line script which
3357: is invoked by B<loncron>. There is no expectation that a typical user
3358: will manually start B<lond> from the command-line. (In other words,
3359: DO NOT START B<lond> YOURSELF.)
3360:
3361: =head1 DESCRIPTION
3362:
3363: There are two characteristics associated with the running of B<lond>,
3364: PROCESS MANAGEMENT (starting, stopping, handling child processes)
3365: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
3366: subscriptions, etc). These are described in two large
3367: sections below.
3368:
3369: B<PROCESS MANAGEMENT>
3370:
3371: Preforker - server who forks first. Runs as a daemon. HUPs.
3372: Uses IDEA encryption
3373:
3374: B<lond> forks off children processes that correspond to the other servers
3375: in the network. Management of these processes can be done at the
3376: parent process level or the child process level.
3377:
3378: B<logs/lond.log> is the location of log messages.
3379:
3380: The process management is now explained in terms of linux shell commands,
3381: subroutines internal to this code, and signal assignments:
3382:
3383: =over 4
3384:
3385: =item *
3386:
3387: PID is stored in B<logs/lond.pid>
3388:
3389: This is the process id number of the parent B<lond> process.
3390:
3391: =item *
3392:
3393: SIGTERM and SIGINT
3394:
3395: Parent signal assignment:
3396: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3397:
3398: Child signal assignment:
3399: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
3400: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
3401: to restart a new child.)
3402:
3403: Command-line invocations:
3404: B<kill> B<-s> SIGTERM I<PID>
3405: B<kill> B<-s> SIGINT I<PID>
3406:
3407: Subroutine B<HUNTSMAN>:
3408: This is only invoked for the B<lond> parent I<PID>.
3409: This kills all the children, and then the parent.
3410: The B<lonc.pid> file is cleared.
3411:
3412: =item *
3413:
3414: SIGHUP
3415:
3416: Current bug:
3417: This signal can only be processed the first time
3418: on the parent process. Subsequent SIGHUP signals
3419: have no effect.
3420:
3421: Parent signal assignment:
3422: $SIG{HUP} = \&HUPSMAN;
3423:
3424: Child signal assignment:
3425: none (nothing happens)
3426:
3427: Command-line invocations:
3428: B<kill> B<-s> SIGHUP I<PID>
3429:
3430: Subroutine B<HUPSMAN>:
3431: This is only invoked for the B<lond> parent I<PID>,
3432: This kills all the children, and then the parent.
3433: The B<lond.pid> file is cleared.
3434:
3435: =item *
3436:
3437: SIGUSR1
3438:
3439: Parent signal assignment:
3440: $SIG{USR1} = \&USRMAN;
3441:
3442: Child signal assignment:
3443: $SIG{USR1}= \&logstatus;
3444:
3445: Command-line invocations:
3446: B<kill> B<-s> SIGUSR1 I<PID>
3447:
3448: Subroutine B<USRMAN>:
3449: When invoked for the B<lond> parent I<PID>,
3450: SIGUSR1 is sent to all the children, and the status of
3451: each connection is logged.
3452:
3453: =item *
3454:
3455: SIGUSR2
3456:
3457: Parent Signal assignment:
3458: $SIG{USR2} = \&UpdateHosts
3459:
3460: Child signal assignment:
3461: NONE
3462:
3463:
3464: =item *
3465:
3466: SIGCHLD
3467:
3468: Parent signal assignment:
3469: $SIG{CHLD} = \&REAPER;
3470:
3471: Child signal assignment:
3472: none
3473:
3474: Command-line invocations:
3475: B<kill> B<-s> SIGCHLD I<PID>
3476:
3477: Subroutine B<REAPER>:
3478: This is only invoked for the B<lond> parent I<PID>.
3479: Information pertaining to the child is removed.
3480: The socket port is cleaned up.
3481:
3482: =back
3483:
3484: B<SERVER-SIDE ACTIVITIES>
3485:
3486: Server-side information can be accepted in an encrypted or non-encrypted
3487: method.
3488:
3489: =over 4
3490:
3491: =item ping
3492:
3493: Query a client in the hosts.tab table; "Are you there?"
3494:
3495: =item pong
3496:
3497: Respond to a ping query.
3498:
3499: =item ekey
3500:
3501: Read in encrypted key, make cipher. Respond with a buildkey.
3502:
3503: =item load
3504:
3505: Respond with CPU load based on a computation upon /proc/loadavg.
3506:
3507: =item currentauth
3508:
3509: Reply with current authentication information (only over an
3510: encrypted channel).
3511:
3512: =item auth
3513:
3514: Only over an encrypted channel, reply as to whether a user's
3515: authentication information can be validated.
3516:
3517: =item passwd
3518:
3519: Allow for a password to be set.
3520:
3521: =item makeuser
3522:
3523: Make a user.
3524:
3525: =item passwd
3526:
3527: Allow for authentication mechanism and password to be changed.
3528:
3529: =item home
3530:
3531: Respond to a question "are you the home for a given user?"
3532:
3533: =item update
3534:
3535: Update contents of a subscribed resource.
3536:
3537: =item unsubscribe
3538:
3539: The server is unsubscribing from a resource.
3540:
3541: =item subscribe
3542:
3543: The server is subscribing to a resource.
3544:
3545: =item log
3546:
3547: Place in B<logs/lond.log>
3548:
3549: =item put
3550:
3551: stores hash in namespace
3552:
3553: =item rolesput
3554:
3555: put a role into a user's environment
3556:
3557: =item get
3558:
3559: returns hash with keys from array
3560: reference filled in from namespace
3561:
3562: =item eget
3563:
3564: returns hash with keys from array
3565: reference filled in from namesp (encrypts the return communication)
3566:
3567: =item rolesget
3568:
3569: get a role from a user's environment
3570:
3571: =item del
3572:
3573: deletes keys out of array from namespace
3574:
3575: =item keys
3576:
3577: returns namespace keys
3578:
3579: =item dump
3580:
3581: dumps the complete (or key matching regexp) namespace into a hash
3582:
3583: =item store
3584:
3585: stores hash permanently
3586: for this url; hashref needs to be given and should be a \%hashname; the
3587: remaining args aren't required and if they aren't passed or are '' they will
3588: be derived from the ENV
3589:
3590: =item restore
3591:
3592: returns a hash for a given url
3593:
3594: =item querysend
3595:
3596: Tells client about the lonsql process that has been launched in response
3597: to a sent query.
3598:
3599: =item queryreply
3600:
3601: Accept information from lonsql and make appropriate storage in temporary
3602: file space.
3603:
3604: =item idput
3605:
3606: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
3607: for each student, defined perhaps by the institutional Registrar.)
3608:
3609: =item idget
3610:
3611: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
3612: for each student, defined perhaps by the institutional Registrar.)
3613:
3614: =item tmpput
3615:
3616: Accept and store information in temporary space.
3617:
3618: =item tmpget
3619:
3620: Send along temporarily stored information.
3621:
3622: =item ls
3623:
3624: List part of a user's directory.
3625:
3626: =item pushtable
3627:
3628: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
3629: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
3630: must be restored manually in case of a problem with the new table file.
3631: pushtable requires that the request be encrypted and validated via
3632: ValidateManager. The form of the command is:
3633: enc:pushtable tablename <tablecontents> \n
3634: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
3635: cleartext newline.
3636:
3637: =item Hanging up (exit or init)
3638:
3639: What to do when a client tells the server that they (the client)
3640: are leaving the network.
3641:
3642: =item unknown command
3643:
3644: If B<lond> is sent an unknown command (not in the list above),
3645: it replys to the client "unknown_cmd".
3646:
3647:
3648: =item UNKNOWN CLIENT
3649:
3650: If the anti-spoofing algorithm cannot verify the client,
3651: the client is rejected (with a "refused" message sent
3652: to the client, and the connection is closed.
3653:
3654: =back
3655:
3656: =head1 PREREQUISITES
3657:
3658: IO::Socket
3659: IO::File
3660: Apache::File
3661: Symbol
3662: POSIX
3663: Crypt::IDEA
3664: LWP::UserAgent()
3665: GDBM_File
3666: Authen::Krb4
3667: Authen::Krb5
3668:
3669: =head1 COREQUISITES
3670:
3671: =head1 OSNAMES
3672:
3673: linux
3674:
3675: =head1 SCRIPT CATEGORIES
3676:
3677: Server/Process
3678:
3679: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lond CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom