Annotation of loncom/lond, revision 1.184
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.184 ! raeburn 5: # $Id: lond,v 1.183 2004/03/09 21:05:13 albertel Exp $
1.60 www 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
1.167 foxr 13: # the Free Software Foundation; either version 2 of the License, or
1.60 www 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
1.178 foxr 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.60 www 24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.161 foxr 27:
28:
1.60 www 29: # http://www.lon-capa.org/
30: #
1.54 harris41 31:
1.134 albertel 32: use strict;
1.80 harris41 33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
1.1 albertel 36: use IO::Socket;
37: use IO::File;
1.126 albertel 38: #use Apache::File;
1.1 albertel 39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
1.3 www 43: use GDBM_File;
44: use Authen::Krb4;
1.91 albertel 45: use Authen::Krb5;
1.49 albertel 46: use lib '/home/httpd/lib/perl/';
47: use localauth;
1.143 foxr 48: use File::Copy;
1.169 foxr 49: use LONCAPA::ConfigFileEdit;
1.1 albertel 50:
1.77 foxr 51: my $DEBUG = 0; # Non zero to enable debug log entries.
52:
1.57 www 53: my $status='';
54: my $lastlog='';
55:
1.184 ! raeburn 56: my $VERSION='$Revision: 1.183 $'; #' stupid emacs
1.121 albertel 57: my $remoteVERSION;
1.115 albertel 58: my $currenthostid;
59: my $currentdomainid;
1.134 albertel 60:
61: my $client;
1.140 foxr 62: my $clientip;
1.161 foxr 63: my $clientname;
1.140 foxr 64:
1.134 albertel 65: my $server;
66: my $thisserver;
67:
1.178 foxr 68: #
69: # Connection type is:
70: # client - All client actions are allowed
71: # manager - only management functions allowed.
72: # both - Both management and client actions are allowed
73: #
1.161 foxr 74:
1.178 foxr 75: my $ConnectionType;
1.161 foxr 76:
1.178 foxr 77: my %hostid;
78: my %hostdom;
79: my %hostip;
1.161 foxr 80:
1.178 foxr 81: my %managers; # Ip -> manager names
1.161 foxr 82:
1.178 foxr 83: my %perlvar; # Will have the apache conf defined perl vars.
1.134 albertel 84:
1.178 foxr 85: #
86: # The array below are password error strings."
87: #
88: my $lastpwderror = 13; # Largest error number from lcpasswd.
89: my @passwderrors = ("ok",
90: "lcpasswd must be run as user 'www'",
91: "lcpasswd got incorrect number of arguments",
92: "lcpasswd did not get the right nubmer of input text lines",
93: "lcpasswd too many simultaneous pwd changes in progress",
94: "lcpasswd User does not exist.",
95: "lcpasswd Incorrect current passwd",
96: "lcpasswd Unable to su to root.",
97: "lcpasswd Cannot set new passwd.",
98: "lcpasswd Username has invalid characters",
99: "lcpasswd Invalid characters in password",
100: "11", "12",
101: "lcpasswd Password mismatch");
1.97 foxr 102:
103:
1.178 foxr 104: # The array below are lcuseradd error strings.:
1.97 foxr 105:
1.178 foxr 106: my $lastadderror = 13;
107: my @adderrors = ("ok",
108: "User ID mismatch, lcuseradd must run as user www",
109: "lcuseradd Incorrect number of command line parameters must be 3",
110: "lcuseradd Incorrect number of stdinput lines, must be 3",
111: "lcuseradd Too many other simultaneous pwd changes in progress",
112: "lcuseradd User does not exist",
113: "lcuseradd Unable to make www member of users's group",
114: "lcuseradd Unable to su to root",
115: "lcuseradd Unable to set password",
116: "lcuseradd Usrname has invalid characters",
117: "lcuseradd Password has an invalid character",
118: "lcuseradd User already exists",
119: "lcuseradd Could not add user.",
120: "lcuseradd Password mismatch");
1.97 foxr 121:
1.96 foxr 122:
123: #
1.140 foxr 124: # GetCertificate: Given a transaction that requires a certificate,
125: # this function will extract the certificate from the transaction
126: # request. Note that at this point, the only concept of a certificate
127: # is the hostname to which we are connected.
128: #
129: # Parameter:
130: # request - The request sent by our client (this parameterization may
131: # need to change when we really use a certificate granting
132: # authority.
133: #
134: sub GetCertificate {
135: my $request = shift;
136:
137: return $clientip;
138: }
1.161 foxr 139:
1.178 foxr 140: #
141: # Return true if client is a manager.
142: #
143: sub isManager {
144: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
145: }
146: #
147: # Return tru if client can do client functions
148: #
149: sub isClient {
150: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
151: }
1.161 foxr 152:
153:
1.156 foxr 154: #
155: # ReadManagerTable: Reads in the current manager table. For now this is
156: # done on each manager authentication because:
157: # - These authentications are not frequent
158: # - This allows dynamic changes to the manager table
159: # without the need to signal to the lond.
160: #
161:
162: sub ReadManagerTable {
163:
164: # Clean out the old table first..
165:
1.166 foxr 166: foreach my $key (keys %managers) {
167: delete $managers{$key};
168: }
169:
170: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
171: if (!open (MANAGERS, $tablename)) {
172: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
173: return;
174: }
175: while(my $host = <MANAGERS>) {
176: chomp($host);
177: if ($host =~ "^#") { # Comment line.
178: logthis('<font color="green"> Skipping line: '. "$host</font>\n");
179: next;
180: }
181: if (!defined $hostip{$host}) { # This is a non cluster member
1.161 foxr 182: # The entry is of the form:
183: # cluname:hostname
184: # cluname - A 'cluster hostname' is needed in order to negotiate
185: # the host key.
186: # hostname- The dns name of the host.
187: #
1.166 foxr 188: my($cluname, $dnsname) = split(/:/, $host);
189:
190: my $ip = gethostbyname($dnsname);
191: if(defined($ip)) { # bad names don't deserve entry.
192: my $hostip = inet_ntoa($ip);
193: $managers{$hostip} = $cluname;
194: logthis('<font color="green"> registering manager '.
195: "$dnsname as $cluname with $hostip </font>\n");
196: }
197: } else {
198: logthis('<font color="green"> existing host'." $host</font>\n");
199: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
200: }
201: }
1.156 foxr 202: }
1.140 foxr 203:
204: #
205: # ValidManager: Determines if a given certificate represents a valid manager.
206: # in this primitive implementation, the 'certificate' is
207: # just the connecting loncapa client name. This is checked
208: # against a valid client list in the configuration.
209: #
210: #
211: sub ValidManager {
212: my $certificate = shift;
213:
1.163 foxr 214: return isManager;
1.140 foxr 215: }
216: #
1.143 foxr 217: # CopyFile: Called as part of the process of installing a
218: # new configuration file. This function copies an existing
219: # file to a backup file.
220: # Parameters:
221: # oldfile - Name of the file to backup.
222: # newfile - Name of the backup file.
223: # Return:
224: # 0 - Failure (errno has failure reason).
225: # 1 - Success.
226: #
227: sub CopyFile {
228: my $oldfile = shift;
229: my $newfile = shift;
230:
231: # The file must exist:
232:
233: if(-e $oldfile) {
234:
235: # Read the old file.
236:
237: my $oldfh = IO::File->new("< $oldfile");
238: if(!$oldfh) {
239: return 0;
240: }
241: my @contents = <$oldfh>; # Suck in the entire file.
242:
243: # write the backup file:
244:
245: my $newfh = IO::File->new("> $newfile");
246: if(!(defined $newfh)){
247: return 0;
248: }
249: my $lines = scalar @contents;
250: for (my $i =0; $i < $lines; $i++) {
251: print $newfh ($contents[$i]);
252: }
253:
254: $oldfh->close;
255: $newfh->close;
256:
257: chmod(0660, $newfile);
258:
259: return 1;
260:
261: } else {
262: return 0;
263: }
264: }
1.157 foxr 265: #
266: # Host files are passed out with externally visible host IPs.
267: # If, for example, we are behind a fire-wall or NAT host, our
268: # internally visible IP may be different than the externally
269: # visible IP. Therefore, we always adjust the contents of the
270: # host file so that the entry for ME is the IP that we believe
271: # we have. At present, this is defined as the entry that
272: # DNS has for us. If by some chance we are not able to get a
273: # DNS translation for us, then we assume that the host.tab file
274: # is correct.
275: # BUGBUGBUG - in the future, we really should see if we can
276: # easily query the interface(s) instead.
277: # Parameter(s):
278: # contents - The contents of the host.tab to check.
279: # Returns:
280: # newcontents - The adjusted contents.
281: #
282: #
283: sub AdjustHostContents {
284: my $contents = shift;
285: my $adjusted;
286: my $me = $perlvar{'lonHostID'};
287:
1.166 foxr 288: foreach my $line (split(/\n/,$contents)) {
1.157 foxr 289: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
290: chomp($line);
291: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
292: if ($id eq $me) {
1.166 foxr 293: my $ip = gethostbyname($name);
294: my $ipnew = inet_ntoa($ip);
295: $ip = $ipnew;
1.157 foxr 296: # Reconstruct the host line and append to adjusted:
297:
1.166 foxr 298: my $newline = "$id:$domain:$role:$name:$ip";
299: if($maxcon ne "") { # Not all hosts have loncnew tuning params
300: $newline .= ":$maxcon:$idleto:$mincon";
301: }
302: $adjusted .= $newline."\n";
1.157 foxr 303:
1.166 foxr 304: } else { # Not me, pass unmodified.
305: $adjusted .= $line."\n";
306: }
1.157 foxr 307: } else { # Blank or comment never re-written.
308: $adjusted .= $line."\n"; # Pass blanks and comments as is.
309: }
1.166 foxr 310: }
311: return $adjusted;
1.157 foxr 312: }
1.143 foxr 313: #
314: # InstallFile: Called to install an administrative file:
315: # - The file is created with <name>.tmp
316: # - The <name>.tmp file is then mv'd to <name>
317: # This lugubrious procedure is done to ensure that we are never without
318: # a valid, even if dated, version of the file regardless of who crashes
319: # and when the crash occurs.
320: #
321: # Parameters:
322: # Name of the file
323: # File Contents.
324: # Return:
325: # nonzero - success.
326: # 0 - failure and $! has an errno.
327: #
328: sub InstallFile {
329: my $Filename = shift;
330: my $Contents = shift;
331: my $TempFile = $Filename.".tmp";
332:
333: # Open the file for write:
334:
335: my $fh = IO::File->new("> $TempFile"); # Write to temp.
336: if(!(defined $fh)) {
337: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
338: return 0;
339: }
340: # write the contents of the file:
341:
342: print $fh ($Contents);
343: $fh->close; # In case we ever have a filesystem w. locking
344:
345: chmod(0660, $TempFile);
346:
347: # Now we can move install the file in position.
348:
349: move($TempFile, $Filename);
350:
351: return 1;
352: }
1.169 foxr 353: #
354: # ConfigFileFromSelector: converts a configuration file selector
355: # (one of host or domain at this point) into a
356: # configuration file pathname.
357: #
358: # Parameters:
359: # selector - Configuration file selector.
360: # Returns:
361: # Full path to the file or undef if the selector is invalid.
362: #
363: sub ConfigFileFromSelector {
364: my $selector = shift;
365: my $tablefile;
366:
367: my $tabledir = $perlvar{'lonTabDir'}.'/';
368: if ($selector eq "hosts") {
369: $tablefile = $tabledir."hosts.tab";
370: } elsif ($selector eq "domain") {
371: $tablefile = $tabledir."domain.tab";
372: } else {
373: return undef;
374: }
375: return $tablefile;
1.143 foxr 376:
1.169 foxr 377: }
1.143 foxr 378: #
1.141 foxr 379: # PushFile: Called to do an administrative push of a file.
380: # - Ensure the file being pushed is one we support.
381: # - Backup the old file to <filename.saved>
382: # - Separate the contents of the new file out from the
383: # rest of the request.
384: # - Write the new file.
385: # Parameter:
386: # Request - The entire user request. This consists of a : separated
387: # string pushfile:tablename:contents.
388: # NOTE: The contents may have :'s in it as well making things a bit
389: # more interesting... but not much.
390: # Returns:
391: # String to send to client ("ok" or "refused" if bad file).
392: #
393: sub PushFile {
394: my $request = shift;
395: my ($command, $filename, $contents) = split(":", $request, 3);
396:
397: # At this point in time, pushes for only the following tables are
398: # supported:
399: # hosts.tab ($filename eq host).
400: # domain.tab ($filename eq domain).
401: # Construct the destination filename or reject the request.
402: #
403: # lonManage is supposed to ensure this, however this session could be
404: # part of some elaborate spoof that managed somehow to authenticate.
405: #
406:
1.169 foxr 407:
408: my $tablefile = ConfigFileFromSelector($filename);
409: if(! (defined $tablefile)) {
1.141 foxr 410: return "refused";
411: }
412: #
413: # >copy< the old table to the backup table
414: # don't rename in case system crashes/reboots etc. in the time
415: # window between a rename and write.
416: #
417: my $backupfile = $tablefile;
418: $backupfile =~ s/\.tab$/.old/;
1.143 foxr 419: if(!CopyFile($tablefile, $backupfile)) {
420: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
421: return "error:$!";
422: }
1.141 foxr 423: &logthis('<font color="green"> Pushfile: backed up '
424: .$tablefile." to $backupfile</font>");
425:
1.157 foxr 426: # If the file being pushed is the host file, we adjust the entry for ourself so that the
427: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
428: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
429: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
430: # that possibilty.
431:
432: if($filename eq "host") {
433: $contents = AdjustHostContents($contents);
434: }
435:
1.141 foxr 436: # Install the new file:
437:
1.143 foxr 438: if(!InstallFile($tablefile, $contents)) {
439: &logthis('<font color="red"> Pushfile: unable to install '
1.145 foxr 440: .$tablefile." $! </font>");
1.143 foxr 441: return "error:$!";
442: }
443: else {
444: &logthis('<font color="green"> Installed new '.$tablefile
445: ."</font>");
446:
447: }
448:
1.141 foxr 449:
450: # Indicate success:
451:
452: return "ok";
453:
454: }
1.145 foxr 455:
456: #
457: # Called to re-init either lonc or lond.
458: #
459: # Parameters:
460: # request - The full request by the client. This is of the form
461: # reinit:<process>
462: # where <process> is allowed to be either of
463: # lonc or lond
464: #
465: # Returns:
466: # The string to be sent back to the client either:
467: # ok - Everything worked just fine.
468: # error:why - There was a failure and why describes the reason.
469: #
470: #
471: sub ReinitProcess {
472: my $request = shift;
473:
1.146 foxr 474:
475: # separate the request (reinit) from the process identifier and
476: # validate it producing the name of the .pid file for the process.
477: #
478: #
479: my ($junk, $process) = split(":", $request);
1.147 foxr 480: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146 foxr 481: if($process eq 'lonc') {
482: $processpidfile = $processpidfile."lonc.pid";
1.147 foxr 483: if (!open(PIDFILE, "< $processpidfile")) {
484: return "error:Open failed for $processpidfile";
485: }
486: my $loncpid = <PIDFILE>;
487: close(PIDFILE);
488: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
489: ."</font>");
490: kill("USR2", $loncpid);
1.146 foxr 491: } elsif ($process eq 'lond') {
1.147 foxr 492: logthis('<font color="red"> Reinitializing self (lond) </font>');
493: &UpdateHosts; # Lond is us!!
1.146 foxr 494: } else {
495: &logthis('<font color="yellow" Invalid reinit request for '.$process
496: ."</font>");
497: return "error:Invalid process identifier $process";
498: }
1.145 foxr 499: return 'ok';
500: }
1.168 foxr 501: # Validate a line in a configuration file edit script:
502: # Validation includes:
503: # - Ensuring the command is valid.
504: # - Ensuring the command has sufficient parameters
505: # Parameters:
506: # scriptline - A line to validate (\n has been stripped for what it's worth).
1.167 foxr 507: #
1.168 foxr 508: # Return:
509: # 0 - Invalid scriptline.
510: # 1 - Valid scriptline
511: # NOTE:
512: # Only the command syntax is checked, not the executability of the
513: # command.
514: #
515: sub isValidEditCommand {
516: my $scriptline = shift;
517:
518: # Line elements are pipe separated:
519:
520: my ($command, $key, $newline) = split(/\|/, $scriptline);
521: &logthis('<font color="green"> isValideditCommand checking: '.
522: "Command = '$command', Key = '$key', Newline = '$newline' </font>\n");
523:
524: if ($command eq "delete") {
525: #
526: # key with no newline.
527: #
528: if( ($key eq "") || ($newline ne "")) {
529: return 0; # Must have key but no newline.
530: } else {
531: return 1; # Valid syntax.
532: }
1.169 foxr 533: } elsif ($command eq "replace") {
1.168 foxr 534: #
535: # key and newline:
536: #
537: if (($key eq "") || ($newline eq "")) {
538: return 0;
539: } else {
540: return 1;
541: }
1.169 foxr 542: } elsif ($command eq "append") {
543: if (($key ne "") && ($newline eq "")) {
544: return 1;
545: } else {
546: return 0;
547: }
1.168 foxr 548: } else {
549: return 0; # Invalid command.
550: }
551: return 0; # Should not get here!!!
552: }
1.169 foxr 553: #
554: # ApplyEdit - Applies an edit command to a line in a configuration
555: # file. It is the caller's responsiblity to validate the
556: # edit line.
557: # Parameters:
558: # $directive - A single edit directive to apply.
559: # Edit directives are of the form:
560: # append|newline - Appends a new line to the file.
561: # replace|key|newline - Replaces the line with key value 'key'
562: # delete|key - Deletes the line with key value 'key'.
563: # $editor - A config file editor object that contains the
564: # file being edited.
565: #
566: sub ApplyEdit {
567: my $directive = shift;
568: my $editor = shift;
569:
570: # Break the directive down into its command and its parameters
571: # (at most two at this point. The meaning of the parameters, if in fact
572: # they exist depends on the command).
573:
574: my ($command, $p1, $p2) = split(/\|/, $directive);
575:
576: if($command eq "append") {
577: $editor->Append($p1); # p1 - key p2 null.
578: } elsif ($command eq "replace") {
579: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline.
580: } elsif ($command eq "delete") {
581: $editor->DeleteLine($p1); # p1 - key p2 null.
582: } else { # Should not get here!!!
583: die "Invalid command given to ApplyEdit $command"
584: }
585: }
586: #
587: # AdjustOurHost:
588: # Adjusts a host file stored in a configuration file editor object
589: # for the true IP address of this host. This is necessary for hosts
590: # that live behind a firewall.
591: # Those hosts have a publicly distributed IP of the firewall, but
592: # internally must use their actual IP. We assume that a given
593: # host only has a single IP interface for now.
594: # Formal Parameters:
595: # editor - The configuration file editor to adjust. This
596: # editor is assumed to contain a hosts.tab file.
597: # Strategy:
598: # - Figure out our hostname.
599: # - Lookup the entry for this host.
600: # - Modify the line to contain our IP
601: # - Do a replace for this host.
602: sub AdjustOurHost {
603: my $editor = shift;
604:
605: # figure out who I am.
606:
607: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname.
608:
609: # Get my host file entry.
610:
611: my $ConfigLine = $editor->Find($myHostName);
612: if(! (defined $ConfigLine)) {
613: die "AdjustOurHost - no entry for me in hosts file $myHostName";
614: }
615: # figure out my IP:
616: # Use the config line to get my hostname.
617: # Use gethostbyname to translate that into an IP address.
618: #
619: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine);
620: my $BinaryIp = gethostbyname($name);
621: my $ip = inet_ntoa($ip);
622: #
623: # Reassemble the config line from the elements in the list.
624: # Note that if the loncnew items were not present before, they will
625: # be now even if they would be empty
626: #
627: my $newConfigLine = $id;
628: foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) {
629: $newConfigLine .= ":".$item;
630: }
631: # Replace the line:
632:
633: $editor->ReplaceLine($id, $newConfigLine);
634:
635: }
636: #
637: # ReplaceConfigFile:
638: # Replaces a configuration file with the contents of a
639: # configuration file editor object.
640: # This is done by:
641: # - Copying the target file to <filename>.old
642: # - Writing the new file to <filename>.tmp
643: # - Moving <filename.tmp> -> <filename>
644: # This laborious process ensures that the system is never without
645: # a configuration file that's at least valid (even if the contents
646: # may be dated).
647: # Parameters:
648: # filename - Name of the file to modify... this is a full path.
649: # editor - Editor containing the file.
650: #
651: sub ReplaceConfigFile {
652: my $filename = shift;
653: my $editor = shift;
1.168 foxr 654:
1.169 foxr 655: CopyFile ($filename, $filename.".old");
656:
657: my $contents = $editor->Get(); # Get the contents of the file.
658:
659: InstallFile($filename, $contents);
660: }
1.168 foxr 661: #
662: #
663: # Called to edit a configuration table file
1.167 foxr 664: # Parameters:
665: # request - The entire command/request sent by lonc or lonManage
666: # Return:
667: # The reply to send to the client.
1.168 foxr 668: #
1.167 foxr 669: sub EditFile {
670: my $request = shift;
671:
672: # Split the command into it's pieces: edit:filetype:script
673:
1.168 foxr 674: my ($request, $filetype, $script) = split(/:/, $request,3); # : in script
1.167 foxr 675:
676: # Check the pre-coditions for success:
677:
678: if($request != "edit") { # Something is amiss afoot alack.
679: return "error:edit request detected, but request != 'edit'\n";
680: }
681: if( ($filetype ne "hosts") &&
682: ($filetype ne "domain")) {
683: return "error:edit requested with invalid file specifier: $filetype \n";
684: }
685:
686: # Split the edit script and check it's validity.
1.168 foxr 687:
688: my @scriptlines = split(/\n/, $script); # one line per element.
689: my $linecount = scalar(@scriptlines);
690: for(my $i = 0; $i < $linecount; $i++) {
691: chomp($scriptlines[$i]);
692: if(!isValidEditCommand($scriptlines[$i])) {
693: return "error:edit with bad script line: '$scriptlines[$i]' \n";
694: }
695: }
1.145 foxr 696:
1.167 foxr 697: # Execute the edit operation.
1.169 foxr 698: # - Create a config file editor for the appropriate file and
699: # - execute each command in the script:
700: #
701: my $configfile = ConfigFileFromSelector($filetype);
702: if (!(defined $configfile)) {
703: return "refused\n";
704: }
705: my $editor = ConfigFileEdit->new($configfile);
1.167 foxr 706:
1.169 foxr 707: for (my $i = 0; $i < $linecount; $i++) {
708: ApplyEdit($scriptlines[$i], $editor);
709: }
710: # If the file is the host file, ensure that our host is
711: # adjusted to have our ip:
712: #
713: if($filetype eq "host") {
714: AdjustOurHost($editor);
715: }
716: # Finally replace the current file with our file.
717: #
718: ReplaceConfigFile($configfile, $editor);
1.167 foxr 719:
720: return "ok\n";
721: }
1.141 foxr 722: #
1.96 foxr 723: # Convert an error return code from lcpasswd to a string value.
724: #
725: sub lcpasswdstrerror {
726: my $ErrorCode = shift;
1.97 foxr 727: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96 foxr 728: return "lcpasswd Unrecognized error return value ".$ErrorCode;
729: } else {
1.98 foxr 730: return $passwderrors[$ErrorCode];
1.96 foxr 731: }
732: }
733:
1.97 foxr 734: #
735: # Convert an error return code from lcuseradd to a string value:
736: #
737: sub lcuseraddstrerror {
738: my $ErrorCode = shift;
739: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
740: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
741: } else {
1.98 foxr 742: return $adderrors[$ErrorCode];
1.97 foxr 743: }
744: }
745:
1.23 harris41 746: # grabs exception and records it to log before exiting
747: sub catchexception {
1.27 albertel 748: my ($error)=@_;
1.25 www 749: $SIG{'QUIT'}='DEFAULT';
750: $SIG{__DIE__}='DEFAULT';
1.165 albertel 751: &status("Catching exception");
1.23 harris41 752: &logthis("<font color=red>CRITICAL: "
1.134 albertel 753: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27 albertel 754: ."a crash with this error msg->[$error]</font>");
1.57 www 755: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 756: if ($client) { print $client "error: $error\n"; }
1.59 www 757: $server->close();
1.27 albertel 758: die($error);
1.23 harris41 759: }
760:
1.63 www 761: sub timeout {
1.165 albertel 762: &status("Handling Timeout");
1.63 www 763: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
764: &catchexception('Timeout');
765: }
1.22 harris41 766: # -------------------------------- Set signal handlers to record abnormal exits
767:
768: $SIG{'QUIT'}=\&catchexception;
769: $SIG{__DIE__}=\&catchexception;
770:
1.81 matthew 771: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 772: &status("Read loncapa.conf and loncapa_apache.conf");
773: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141 foxr 774: %perlvar=%{$perlvarref};
1.80 harris41 775: undef $perlvarref;
1.19 www 776:
1.35 harris41 777: # ----------------------------- Make sure this process is running from user=www
778: my $wwwid=getpwnam('www');
779: if ($wwwid!=$<) {
1.134 albertel 780: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
781: my $subj="LON: $currenthostid User ID mismatch";
1.37 harris41 782: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 783: mailto $emailto -s '$subj' > /dev/null");
784: exit 1;
785: }
786:
1.19 www 787: # --------------------------------------------- Check if other instance running
788:
789: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
790:
791: if (-e $pidfile) {
792: my $lfh=IO::File->new("$pidfile");
793: my $pide=<$lfh>;
794: chomp($pide);
1.29 harris41 795: if (kill 0 => $pide) { die "already running"; }
1.19 www 796: }
1.1 albertel 797:
798: # ------------------------------------------------------------- Read hosts file
799:
800:
801:
802: # establish SERVER socket, bind and listen.
803: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
804: Type => SOCK_STREAM,
805: Proto => 'tcp',
806: Reuse => 1,
807: Listen => 10 )
1.29 harris41 808: or die "making socket: $@\n";
1.1 albertel 809:
810: # --------------------------------------------------------- Do global variables
811:
812: # global variables
813:
1.134 albertel 814: my %children = (); # keys are current child process IDs
1.1 albertel 815:
816: sub REAPER { # takes care of dead children
817: $SIG{CHLD} = \&REAPER;
1.165 albertel 818: &status("Handling child death");
1.178 foxr 819: my $pid;
820: do {
821: $pid = waitpid(-1,&WNOHANG());
822: if (defined($children{$pid})) {
823: &logthis("Child $pid died");
824: delete($children{$pid});
1.183 albertel 825: } elsif ($pid > 0) {
1.178 foxr 826: &logthis("Unknown Child $pid died");
827: }
828: } while ( $pid > 0 );
829: foreach my $child (keys(%children)) {
830: $pid = waitpid($child,&WNOHANG());
831: if ($pid > 0) {
832: &logthis("Child $child - $pid looks like we missed it's death");
833: delete($children{$pid});
834: }
1.176 albertel 835: }
1.165 albertel 836: &status("Finished Handling child death");
1.1 albertel 837: }
838:
839: sub HUNTSMAN { # signal handler for SIGINT
1.165 albertel 840: &status("Killing children (INT)");
1.1 albertel 841: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
842: kill 'INT' => keys %children;
1.59 www 843: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 844: my $execdir=$perlvar{'lonDaemons'};
845: unlink("$execdir/logs/lond.pid");
1.9 www 846: &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.165 albertel 847: &status("Done killing children");
1.1 albertel 848: exit; # clean up with dignity
849: }
850:
851: sub HUPSMAN { # signal handler for SIGHUP
852: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1.165 albertel 853: &status("Killing children for restart (HUP)");
1.1 albertel 854: kill 'INT' => keys %children;
1.59 www 855: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9 www 856: &logthis("<font color=red>CRITICAL: Restarting</font>");
1.134 albertel 857: my $execdir=$perlvar{'lonDaemons'};
1.30 harris41 858: unlink("$execdir/logs/lond.pid");
1.165 albertel 859: &status("Restarting self (HUP)");
1.1 albertel 860: exec("$execdir/lond"); # here we go again
861: }
862:
1.144 foxr 863: #
1.148 foxr 864: # Kill off hashes that describe the host table prior to re-reading it.
865: # Hashes affected are:
866: # %hostid, %hostdom %hostip
867: #
868: sub KillHostHashes {
869: foreach my $key (keys %hostid) {
870: delete $hostid{$key};
871: }
872: foreach my $key (keys %hostdom) {
873: delete $hostdom{$key};
874: }
875: foreach my $key (keys %hostip) {
876: delete $hostip{$key};
877: }
878: }
879: #
880: # Read in the host table from file and distribute it into the various hashes:
881: #
882: # - %hostid - Indexed by IP, the loncapa hostname.
883: # - %hostdom - Indexed by loncapa hostname, the domain.
884: # - %hostip - Indexed by hostid, the Ip address of the host.
885: sub ReadHostTable {
886:
887: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
888:
889: while (my $configline=<CONFIG>) {
1.178 foxr 890: if (!($configline =~ /^\s*\#/)) {
891: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
892: chomp($ip); $ip=~s/\D+$//;
893: $hostid{$ip}=$id;
894: $hostdom{$id}=$domain;
895: $hostip{$id}=$ip;
896: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
897: }
1.148 foxr 898: }
899: close(CONFIG);
900: }
901: #
902: # Reload the Apache daemon's state.
1.150 foxr 903: # This is done by invoking /home/httpd/perl/apachereload
904: # a setuid perl script that can be root for us to do this job.
1.148 foxr 905: #
906: sub ReloadApache {
1.150 foxr 907: my $execdir = $perlvar{'lonDaemons'};
908: my $script = $execdir."/apachereload";
909: system($script);
1.148 foxr 910: }
911:
912: #
1.144 foxr 913: # Called in response to a USR2 signal.
914: # - Reread hosts.tab
915: # - All children connected to hosts that were removed from hosts.tab
916: # are killed via SIGINT
917: # - All children connected to previously existing hosts are sent SIGUSR1
918: # - Our internal hosts hash is updated to reflect the new contents of
919: # hosts.tab causing connections from hosts added to hosts.tab to
920: # now be honored.
921: #
922: sub UpdateHosts {
1.165 albertel 923: &status("Reload hosts.tab");
1.147 foxr 924: logthis('<font color="blue"> Updating connections </font>');
1.148 foxr 925: #
926: # The %children hash has the set of IP's we currently have children
927: # on. These need to be matched against records in the hosts.tab
928: # Any ip's no longer in the table get killed off they correspond to
929: # either dropped or changed hosts. Note that the re-read of the table
930: # will take care of new and changed hosts as connections come into being.
931:
932:
933: KillHostHashes;
934: ReadHostTable;
935:
936: foreach my $child (keys %children) {
937: my $childip = $children{$child};
938: if(!$hostid{$childip}) {
1.149 foxr 939: logthis('<font color="blue"> UpdateHosts killing child '
940: ." $child for ip $childip </font>");
1.148 foxr 941: kill('INT', $child);
1.149 foxr 942: } else {
943: logthis('<font color="green"> keeping child for ip '
944: ." $childip (pid=$child) </font>");
1.148 foxr 945: }
946: }
947: ReloadApache;
1.165 albertel 948: &status("Finished reloading hosts.tab");
1.144 foxr 949: }
950:
1.148 foxr 951:
1.57 www 952: sub checkchildren {
1.165 albertel 953: &status("Checking on the children (sending signals)");
1.57 www 954: &initnewstatus();
955: &logstatus();
956: &logthis('Going to check on the children');
1.134 albertel 957: my $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 958: foreach (sort keys %children) {
1.57 www 959: sleep 1;
960: unless (kill 'USR1' => $_) {
961: &logthis ('Child '.$_.' is dead');
962: &logstatus($$.' is dead');
963: }
1.61 harris41 964: }
1.63 www 965: sleep 5;
1.113 albertel 966: $SIG{ALRM} = sub { die "timeout" };
967: $SIG{__DIE__} = 'DEFAULT';
1.165 albertel 968: &status("Checking on the children (waiting for reports)");
1.63 www 969: foreach (sort keys %children) {
970: unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113 albertel 971: eval {
972: alarm(300);
1.63 www 973: &logthis('Child '.$_.' did not respond');
1.67 albertel 974: kill 9 => $_;
1.131 albertel 975: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
976: #$subj="LON: $currenthostid killed lond process $_";
977: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
978: #$execdir=$perlvar{'lonDaemons'};
979: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.113 albertel 980: alarm(0);
981: }
1.63 www 982: }
983: }
1.113 albertel 984: $SIG{ALRM} = 'DEFAULT';
1.155 albertel 985: $SIG{__DIE__} = \&catchexception;
1.165 albertel 986: &status("Finished checking children");
1.57 www 987: }
988:
1.1 albertel 989: # --------------------------------------------------------------------- Logging
990:
991: sub logthis {
992: my $message=shift;
993: my $execdir=$perlvar{'lonDaemons'};
994: my $fh=IO::File->new(">>$execdir/logs/lond.log");
995: my $now=time;
996: my $local=localtime($now);
1.58 www 997: $lastlog=$local.': '.$message;
1.1 albertel 998: print $fh "$local ($$): $message\n";
999: }
1000:
1.77 foxr 1001: # ------------------------- Conditional log if $DEBUG true.
1002: sub Debug {
1003: my $message = shift;
1004: if($DEBUG) {
1005: &logthis($message);
1006: }
1007: }
1.161 foxr 1008:
1009: #
1010: # Sub to do replies to client.. this gives a hook for some
1011: # debug tracing too:
1012: # Parameters:
1013: # fd - File open on client.
1014: # reply - Text to send to client.
1015: # request - Original request from client.
1016: #
1017: sub Reply {
1018: my $fd = shift;
1019: my $reply = shift;
1020: my $request = shift;
1021:
1022: print $fd $reply;
1023: Debug("Request was $request Reply was $reply");
1024:
1025: }
1.57 www 1026: # ------------------------------------------------------------------ Log status
1027:
1028: sub logstatus {
1.178 foxr 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");
1.57 www 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";
1.64 www 1051: opendir(DIR,"$docdir/lon-status/londchld");
1.134 albertel 1052: while (my $filename=readdir(DIR)) {
1.64 www 1053: unlink("$docdir/lon-status/londchld/$filename");
1054: }
1055: closedir(DIR);
1.57 www 1056: }
1057:
1058: # -------------------------------------------------------------- Status setting
1059:
1060: sub status {
1061: my $what=shift;
1062: my $now=time;
1063: my $local=localtime($now);
1.178 foxr 1064: $status=$local.': '.$what;
1065: $0='lond: '.$what.' '.$local;
1.57 www 1066: }
1.11 www 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:
1.1 albertel 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 {
1.9 www 1097: &logthis(
1098: "<font color=red>CRITICAL: "
1099: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 1100: }
1101: } else {
1.9 www 1102: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1 albertel 1103: }
1104: }
1105:
1106: # -------------------------------------------------- Non-critical communication
1.11 www 1107:
1.1 albertel 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;
1.115 albertel 1125: if ($server ne $currenthostid) {
1.1 albertel 1126: $answer=subreply($cmd,$server);
1127: if ($answer eq 'con_lost') {
1128: $answer=subreply("ping",$server);
1129: if ($answer ne $server) {
1.115 albertel 1130: &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1 albertel 1131: &reconlonc("$perlvar{'lonSockDir'}/$server");
1132: }
1133: $answer=subreply($cmd,$server);
1134: }
1135: } else {
1136: $answer='self_reply';
1137: }
1138: return $answer;
1139: }
1140:
1.13 www 1141: # -------------------------------------------------------------- Talk to lonsql
1142:
1.12 harris41 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:
1.1 albertel 1165: # -------------------------------------------- Return path to profile directory
1.11 www 1166:
1.1 albertel 1167: sub propath {
1168: my ($udom,$uname)=@_;
1169: $udom=~s/\W//g;
1170: $uname=~s/\W//g;
1.16 www 1171: my $subdir=$uname.'__';
1.1 albertel 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?
1.11 www 1178:
1.1 albertel 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:
1.134 albertel 1194: my $fpid=fork;
1.1 albertel 1195: exit if $fpid;
1.29 harris41 1196: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 1197:
1.29 harris41 1198: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 1199:
1200: # ------------------------------------------------------- Write our PID on disk
1201:
1.134 albertel 1202: my $execdir=$perlvar{'lonDaemons'};
1.1 albertel 1203: open (PIDSAVE,">$execdir/logs/lond.pid");
1204: print PIDSAVE "$$\n";
1205: close(PIDSAVE);
1.9 www 1206: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57 www 1207: &status('Starting');
1.1 albertel 1208:
1.106 foxr 1209:
1.1 albertel 1210:
1211: # ----------------------------------------------------- Install signal handlers
1212:
1.57 www 1213:
1.1 albertel 1214: $SIG{CHLD} = \&REAPER;
1215: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1216: $SIG{HUP} = \&HUPSMAN;
1.57 www 1217: $SIG{USR1} = \&checkchildren;
1.144 foxr 1218: $SIG{USR2} = \&UpdateHosts;
1.106 foxr 1219:
1.148 foxr 1220: # Read the host hashes:
1221:
1222: ReadHostTable;
1.106 foxr 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:
1.1 albertel 1229: while (1) {
1.165 albertel 1230: &status('Starting accept');
1.106 foxr 1231: $client = $server->accept() or next;
1.165 albertel 1232: &status('Accepted '.$client.' off to spawn');
1.106 foxr 1233: make_new_child($client);
1.165 albertel 1234: &status('Finished spawning');
1.1 albertel 1235: }
1236:
1237: sub make_new_child {
1238: my $pid;
1.178 foxr 1239: my $cipher;
1.1 albertel 1240: my $sigset;
1.106 foxr 1241:
1242: $client = shift;
1.165 albertel 1243: &status('Starting new child '.$client);
1.161 foxr 1244: &logthis('<font color="green"> Attempting to start child ('.$client.
1245: ")</font>");
1.1 albertel 1246: # block signal for fork
1247: $sigset = POSIX::SigSet->new(SIGINT);
1248: sigprocmask(SIG_BLOCK, $sigset)
1.29 harris41 1249: or die "Can't block SIGINT for fork: $!\n";
1.134 albertel 1250:
1.29 harris41 1251: die "fork: $!" unless defined ($pid = fork);
1.148 foxr 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);
1.180 albertel 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: $clientip='Unavailable';
1272: }
1.1 albertel 1273:
1274: if ($pid) {
1275: # Parent records the child's birth and returns.
1276: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 1277: or die "Can't unblock SIGINT for fork: $!\n";
1.148 foxr 1278: $children{$pid} = $clientip;
1.57 www 1279: &status('Started child '.$pid);
1.1 albertel 1280: return;
1281: } else {
1282: # Child can *not* return from this subroutine.
1283: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1.126 albertel 1284: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
1285: #don't get intercepted
1.57 www 1286: $SIG{USR1}= \&logstatus;
1.63 www 1287: $SIG{ALRM}= \&timeout;
1.57 www 1288: $lastlog='Forked ';
1289: $status='Forked';
1290:
1.1 albertel 1291: # unblock signals
1292: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 1293: or die "Can't unblock SIGINT for fork: $!\n";
1.13 www 1294:
1.178 foxr 1295: my $tmpsnum=0;
1296: #---------------------------------------------------- kerberos 5 initialization
1.91 albertel 1297: &Authen::Krb5::init_context();
1298: &Authen::Krb5::init_ets();
1299:
1.161 foxr 1300: &status('Accepted connection');
1.1 albertel 1301: # =============================================================================
1302: # do something with the connection
1303: # -----------------------------------------------------------------------------
1.148 foxr 1304: # see if we know client and check for spoof IP by challenge
1305:
1.161 foxr 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: }
1.2 www 1346: } else {
1.161 foxr 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) {
1.1 albertel 1358: # ---------------- New known client connecting, could mean machine online again
1.161 foxr 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;
1.115 albertel 1365: }
1.161 foxr 1366: &reconlonc("$perlvar{'lonSockDir'}/$id");
1367: }
1368: &logthis("<font color=green>Established connection: $clientname</font>");
1369: &status('Will listen to '.$clientname);
1.178 foxr 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:'.$uname.','.$contentpwd.','.
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) {
1.184 ! raeburn 1830: my ($cmd,$fname)=split(/:/,$userinput);
! 1831: my ($udom,$uname,$ufile) = ($fname =~ /^([^\/]+)\/([^\/]+)\/(.+)$/);
1.178 foxr 1832: my $udir=propath($udom,$uname).'/userfiles';
1833: unless (-e $udir) { mkdir($udir,0770); }
1834: if (-e $udir) {
1.184 ! raeburn 1835: $ufile=~s/^[\.\~]+//;
! 1836: my $path = $udir;
! 1837: if ($ufile =~/(.+)\/([^\/]+)$/) {
! 1838: my @parts=split(/\//,$1);
! 1839: foreach my $part (@parts) {
! 1840: $path .= '/'.$part;
! 1841: if ((-e $path)!=1) {
! 1842: mkdir($path,0770);
1.182 raeburn 1843: }
1844: }
1845: }
1.184 ! raeburn 1846: my $destname=$udir.'/'.$ufile;
! 1847: my $transname=$udir.'/'.$ufile.'.in.transit';
! 1848: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1.178 foxr 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;
1.184 ! raeburn 1858: &logthis("LWP GET: $message for $fname ($remoteurl)");
1.178 foxr 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", $userinput);
1874: }
1875: # ------------------------------------------ authenticate access to a user file
1876: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1877: if(isClient) {
1878: my ($cmd,$fname,$session)=split(/:/,$userinput);
1879: chomp($session);
1880: my $reply='non_auth';
1881: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1882: $session.'.id')) {
1883: while (my $line=<ENVIN>) {
1.184 ! raeburn 1884: if ($line=~ m|userfile\.$fname\=|) { $reply='ok'; }
1.178 foxr 1885: }
1886: close(ENVIN);
1887: print $client $reply."\n";
1888: } else {
1889: print $client "invalid_token\n";
1890: }
1891: } else {
1892: Reply($client, "refused\n", $userinput);
1893:
1894: }
1895: # ----------------------------------------------------------------- unsubscribe
1896: } elsif ($userinput =~ /^unsub/) {
1897: if(isClient) {
1898: my ($cmd,$fname)=split(/:/,$userinput);
1899: if (-e $fname) {
1900: print $client &unsub($client,$fname,$clientip);
1901: } else {
1902: print $client "not_found\n";
1903: }
1904: } else {
1905: Reply($client, "refused\n", $userinput);
1906:
1907: }
1908: # ------------------------------------------------------------------- subscribe
1909: } elsif ($userinput =~ /^sub/) {
1910: if(isClient) {
1911: print $client &subscribe($userinput,$clientip);
1912: } else {
1913: Reply($client, "refused\n", $userinput);
1914:
1915: }
1916: # ------------------------------------------------------------- current version
1917: } elsif ($userinput =~ /^currentversion/) {
1918: if(isClient) {
1919: my ($cmd,$fname)=split(/:/,$userinput);
1920: print $client ¤tversion($fname)."\n";
1921: } else {
1922: Reply($client, "refused\n", $userinput);
1923:
1924: }
1925: # ------------------------------------------------------------------------- log
1926: } elsif ($userinput =~ /^log/) {
1927: if(isClient) {
1928: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1929: chomp($what);
1930: my $proname=propath($udom,$uname);
1931: my $now=time;
1932: {
1933: my $hfh;
1934: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1935: print $hfh "$now:$clientname:$what\n";
1936: print $client "ok\n";
1937: } else {
1938: print $client "error: ".($!+0)
1939: ." IO::File->new Failed "
1940: ."while attempting log\n";
1941: }
1942: }
1943: } else {
1944: Reply($client, "refused\n", $userinput);
1945:
1946: }
1947: # ------------------------------------------------------------------------- put
1948: } elsif ($userinput =~ /^put/) {
1949: if(isClient) {
1950: my ($cmd,$udom,$uname,$namespace,$what)
1951: =split(/:/,$userinput);
1952: $namespace=~s/\//\_/g;
1953: $namespace=~s/\W//g;
1954: if ($namespace ne 'roles') {
1955: chomp($what);
1956: my $proname=propath($udom,$uname);
1957: my $now=time;
1958: unless ($namespace=~/^nohist\_/) {
1959: my $hfh;
1960: if (
1961: $hfh=IO::File->new(">>$proname/$namespace.hist")
1962: ) { print $hfh "P:$now:$what\n"; }
1963: }
1964: my @pairs=split(/\&/,$what);
1965: my %hash;
1966: if (tie(%hash,'GDBM_File',
1967: "$proname/$namespace.db",
1968: &GDBM_WRCREAT(),0640)) {
1969: foreach my $pair (@pairs) {
1970: my ($key,$value)=split(/=/,$pair);
1971: $hash{$key}=$value;
1972: }
1973: if (untie(%hash)) {
1974: print $client "ok\n";
1975: } else {
1976: print $client "error: ".($!+0)
1977: ." untie(GDBM) failed ".
1978: "while attempting put\n";
1979: }
1980: } else {
1981: print $client "error: ".($!)
1982: ." tie(GDBM) Failed ".
1983: "while attempting put\n";
1984: }
1985: } else {
1986: print $client "refused\n";
1987: }
1988: } else {
1989: Reply($client, "refused\n", $userinput);
1990:
1991: }
1992: # ------------------------------------------------------------------- inc
1993: } elsif ($userinput =~ /^inc:/) {
1994: if(isClient) {
1995: my ($cmd,$udom,$uname,$namespace,$what)
1996: =split(/:/,$userinput);
1997: $namespace=~s/\//\_/g;
1998: $namespace=~s/\W//g;
1999: if ($namespace ne 'roles') {
2000: chomp($what);
2001: my $proname=propath($udom,$uname);
2002: my $now=time;
2003: unless ($namespace=~/^nohist\_/) {
2004: my $hfh;
2005: if (
2006: $hfh=IO::File->new(">>$proname/$namespace.hist")
2007: ) { print $hfh "P:$now:$what\n"; }
2008: }
2009: my @pairs=split(/\&/,$what);
2010: my %hash;
2011: if (tie(%hash,'GDBM_File',
2012: "$proname/$namespace.db",
2013: &GDBM_WRCREAT(),0640)) {
2014: foreach my $pair (@pairs) {
2015: my ($key,$value)=split(/=/,$pair);
2016: # We could check that we have a number...
2017: if (! defined($value) || $value eq '') {
2018: $value = 1;
2019: }
2020: $hash{$key}+=$value;
2021: }
2022: if (untie(%hash)) {
2023: print $client "ok\n";
2024: } else {
2025: print $client "error: ".($!+0)
2026: ." untie(GDBM) failed ".
1.181 albertel 2027: "while attempting inc\n";
1.178 foxr 2028: }
2029: } else {
2030: print $client "error: ".($!)
2031: ." tie(GDBM) Failed ".
1.181 albertel 2032: "while attempting inc\n";
1.178 foxr 2033: }
2034: } else {
2035: print $client "refused\n";
2036: }
2037: } else {
2038: Reply($client, "refused\n", $userinput);
2039:
2040: }
2041: # -------------------------------------------------------------------- rolesput
2042: } elsif ($userinput =~ /^rolesput/) {
2043: if(isClient) {
2044: &Debug("rolesput");
2045: if ($wasenc==1) {
2046: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2047: =split(/:/,$userinput);
2048: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2049: "user = ".$exeuser." udom=".$udom.
2050: "what = ".$what);
2051: my $namespace='roles';
2052: chomp($what);
2053: my $proname=propath($udom,$uname);
2054: my $now=time;
2055: {
2056: my $hfh;
2057: if (
2058: $hfh=IO::File->new(">>$proname/$namespace.hist")
2059: ) {
2060: print $hfh "P:$now:$exedom:$exeuser:$what\n";
2061: }
2062: }
2063: my @pairs=split(/\&/,$what);
2064: my %hash;
2065: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2066: foreach my $pair (@pairs) {
2067: my ($key,$value)=split(/=/,$pair);
2068: &ManagePermissions($key, $udom, $uname,
2069: &GetAuthType( $udom,
2070: $uname));
2071: $hash{$key}=$value;
2072: }
2073: if (untie(%hash)) {
2074: print $client "ok\n";
2075: } else {
2076: print $client "error: ".($!+0)
2077: ." untie(GDBM) Failed ".
2078: "while attempting rolesput\n";
2079: }
2080: } else {
2081: print $client "error: ".($!+0)
2082: ." tie(GDBM) Failed ".
2083: "while attempting rolesput\n";
2084: }
2085: } else {
2086: print $client "refused\n";
2087: }
2088: } else {
2089: Reply($client, "refused\n", $userinput);
2090:
2091: }
2092: # -------------------------------------------------------------------- rolesdel
2093: } elsif ($userinput =~ /^rolesdel/) {
2094: if(isClient) {
2095: &Debug("rolesdel");
2096: if ($wasenc==1) {
2097: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
2098: =split(/:/,$userinput);
2099: &Debug("cmd = ".$cmd." exedom= ".$exedom.
2100: "user = ".$exeuser." udom=".$udom.
2101: "what = ".$what);
2102: my $namespace='roles';
2103: chomp($what);
2104: my $proname=propath($udom,$uname);
2105: my $now=time;
2106: {
2107: my $hfh;
2108: if (
2109: $hfh=IO::File->new(">>$proname/$namespace.hist")
2110: ) {
2111: print $hfh "D:$now:$exedom:$exeuser:$what\n";
2112: }
2113: }
2114: my @rolekeys=split(/\&/,$what);
2115: my %hash;
2116: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2117: foreach my $key (@rolekeys) {
2118: delete $hash{$key};
2119: }
2120: if (untie(%hash)) {
2121: print $client "ok\n";
2122: } else {
2123: print $client "error: ".($!+0)
2124: ." untie(GDBM) Failed ".
2125: "while attempting rolesdel\n";
2126: }
2127: } else {
2128: print $client "error: ".($!+0)
2129: ." tie(GDBM) Failed ".
2130: "while attempting rolesdel\n";
2131: }
2132: } else {
2133: print $client "refused\n";
2134: }
2135: } else {
2136: Reply($client, "refused\n", $userinput);
2137:
2138: }
2139: # ------------------------------------------------------------------------- get
2140: } elsif ($userinput =~ /^get/) {
2141: if(isClient) {
2142: my ($cmd,$udom,$uname,$namespace,$what)
2143: =split(/:/,$userinput);
2144: $namespace=~s/\//\_/g;
2145: $namespace=~s/\W//g;
2146: chomp($what);
2147: my @queries=split(/\&/,$what);
2148: my $proname=propath($udom,$uname);
2149: my $qresult='';
2150: my %hash;
2151: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2152: for (my $i=0;$i<=$#queries;$i++) {
2153: $qresult.="$hash{$queries[$i]}&";
2154: }
2155: if (untie(%hash)) {
2156: $qresult=~s/\&$//;
2157: print $client "$qresult\n";
2158: } else {
2159: print $client "error: ".($!+0)
2160: ." untie(GDBM) Failed ".
2161: "while attempting get\n";
2162: }
2163: } else {
2164: if ($!+0 == 2) {
2165: print $client "error:No such file or ".
2166: "GDBM reported bad block error\n";
2167: } else {
2168: print $client "error: ".($!+0)
2169: ." tie(GDBM) Failed ".
2170: "while attempting get\n";
2171: }
2172: }
2173: } else {
2174: Reply($client, "refused\n", $userinput);
2175:
2176: }
2177: # ------------------------------------------------------------------------ eget
2178: } elsif ($userinput =~ /^eget/) {
2179: if (isClient) {
2180: my ($cmd,$udom,$uname,$namespace,$what)
2181: =split(/:/,$userinput);
2182: $namespace=~s/\//\_/g;
2183: $namespace=~s/\W//g;
2184: chomp($what);
2185: my @queries=split(/\&/,$what);
2186: my $proname=propath($udom,$uname);
2187: my $qresult='';
2188: my %hash;
2189: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2190: for (my $i=0;$i<=$#queries;$i++) {
2191: $qresult.="$hash{$queries[$i]}&";
2192: }
2193: if (untie(%hash)) {
2194: $qresult=~s/\&$//;
2195: if ($cipher) {
2196: my $cmdlength=length($qresult);
2197: $qresult.=" ";
2198: my $encqresult='';
2199: for
2200: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
2201: $encqresult.=
2202: unpack("H16",
2203: $cipher->encrypt(substr($qresult,$encidx,8)));
2204: }
2205: print $client "enc:$cmdlength:$encqresult\n";
2206: } else {
2207: print $client "error:no_key\n";
2208: }
2209: } else {
2210: print $client "error: ".($!+0)
2211: ." untie(GDBM) Failed ".
2212: "while attempting eget\n";
2213: }
2214: } else {
2215: print $client "error: ".($!+0)
2216: ." tie(GDBM) Failed ".
2217: "while attempting eget\n";
2218: }
2219: } else {
2220: Reply($client, "refused\n", $userinput);
2221:
2222: }
2223: # ------------------------------------------------------------------------- del
2224: } elsif ($userinput =~ /^del/) {
2225: if(isClient) {
2226: my ($cmd,$udom,$uname,$namespace,$what)
2227: =split(/:/,$userinput);
2228: $namespace=~s/\//\_/g;
2229: $namespace=~s/\W//g;
2230: chomp($what);
2231: my $proname=propath($udom,$uname);
2232: my $now=time;
2233: unless ($namespace=~/^nohist\_/) {
2234: my $hfh;
2235: if (
2236: $hfh=IO::File->new(">>$proname/$namespace.hist")
2237: ) { print $hfh "D:$now:$what\n"; }
2238: }
2239: my @keys=split(/\&/,$what);
2240: my %hash;
2241: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2242: foreach my $key (@keys) {
2243: delete($hash{$key});
2244: }
2245: if (untie(%hash)) {
2246: print $client "ok\n";
2247: } else {
2248: print $client "error: ".($!+0)
2249: ." untie(GDBM) Failed ".
2250: "while attempting del\n";
2251: }
2252: } else {
2253: print $client "error: ".($!+0)
2254: ." tie(GDBM) Failed ".
2255: "while attempting del\n";
2256: }
2257: } else {
2258: Reply($client, "refused\n", $userinput);
2259:
2260: }
2261: # ------------------------------------------------------------------------ keys
2262: } elsif ($userinput =~ /^keys/) {
2263: if(isClient) {
2264: my ($cmd,$udom,$uname,$namespace)
2265: =split(/:/,$userinput);
2266: $namespace=~s/\//\_/g;
2267: $namespace=~s/\W//g;
2268: my $proname=propath($udom,$uname);
2269: my $qresult='';
2270: my %hash;
2271: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2272: foreach my $key (keys %hash) {
2273: $qresult.="$key&";
2274: }
2275: if (untie(%hash)) {
2276: $qresult=~s/\&$//;
2277: print $client "$qresult\n";
2278: } else {
2279: print $client "error: ".($!+0)
2280: ." untie(GDBM) Failed ".
2281: "while attempting keys\n";
2282: }
2283: } else {
2284: print $client "error: ".($!+0)
2285: ." tie(GDBM) Failed ".
2286: "while attempting keys\n";
2287: }
2288: } else {
2289: Reply($client, "refused\n", $userinput);
2290:
2291: }
2292: # ----------------------------------------------------------------- dumpcurrent
2293: } elsif ($userinput =~ /^currentdump/) {
2294: if (isClient) {
2295: my ($cmd,$udom,$uname,$namespace)
2296: =split(/:/,$userinput);
2297: $namespace=~s/\//\_/g;
2298: $namespace=~s/\W//g;
2299: my $qresult='';
2300: my $proname=propath($udom,$uname);
2301: my %hash;
2302: if (tie(%hash,'GDBM_File',
2303: "$proname/$namespace.db",
2304: &GDBM_READER(),0640)) {
2305: # Structure of %data:
2306: # $data{$symb}->{$parameter}=$value;
2307: # $data{$symb}->{'v.'.$parameter}=$version;
2308: # since $parameter will be unescaped, we do not
2309: # have to worry about silly parameter names...
2310: my %data = ();
2311: while (my ($key,$value) = each(%hash)) {
2312: my ($v,$symb,$param) = split(/:/,$key);
2313: next if ($v eq 'version' || $symb eq 'keys');
2314: next if (exists($data{$symb}) &&
2315: exists($data{$symb}->{$param}) &&
2316: $data{$symb}->{'v.'.$param} > $v);
2317: $data{$symb}->{$param}=$value;
2318: $data{$symb}->{'v.'.$param}=$v;
2319: }
2320: if (untie(%hash)) {
2321: while (my ($symb,$param_hash) = each(%data)) {
2322: while(my ($param,$value) = each (%$param_hash)){
2323: next if ($param =~ /^v\./);
2324: $qresult.=$symb.':'.$param.'='.$value.'&';
2325: }
2326: }
2327: chop($qresult);
2328: print $client "$qresult\n";
2329: } else {
2330: print $client "error: ".($!+0)
2331: ." untie(GDBM) Failed ".
2332: "while attempting currentdump\n";
2333: }
2334: } else {
2335: print $client "error: ".($!+0)
2336: ." tie(GDBM) Failed ".
2337: "while attempting currentdump\n";
2338: }
2339: } else {
2340: Reply($client, "refused\n", $userinput);
2341: }
2342: # ------------------------------------------------------------------------ dump
2343: } elsif ($userinput =~ /^dump/) {
2344: if(isClient) {
2345: my ($cmd,$udom,$uname,$namespace,$regexp)
2346: =split(/:/,$userinput);
2347: $namespace=~s/\//\_/g;
2348: $namespace=~s/\W//g;
2349: if (defined($regexp)) {
2350: $regexp=&unescape($regexp);
2351: } else {
2352: $regexp='.';
2353: }
2354: my $qresult='';
2355: my $proname=propath($udom,$uname);
2356: my %hash;
2357: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2358: while (my ($key,$value) = each(%hash)) {
2359: if ($regexp eq '.') {
2360: $qresult.=$key.'='.$value.'&';
2361: } else {
2362: my $unescapeKey = &unescape($key);
2363: if (eval('$unescapeKey=~/$regexp/')) {
2364: $qresult.="$key=$value&";
2365: }
2366: }
2367: }
2368: if (untie(%hash)) {
2369: chop($qresult);
2370: print $client "$qresult\n";
2371: } else {
2372: print $client "error: ".($!+0)
2373: ." untie(GDBM) Failed ".
2374: "while attempting dump\n";
2375: }
2376: } else {
2377: print $client "error: ".($!+0)
2378: ." tie(GDBM) Failed ".
2379: "while attempting dump\n";
2380: }
2381: } else {
2382: Reply($client, "refused\n", $userinput);
2383:
2384: }
2385: # ----------------------------------------------------------------------- store
2386: } elsif ($userinput =~ /^store/) {
2387: if(isClient) {
2388: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2389: =split(/:/,$userinput);
2390: $namespace=~s/\//\_/g;
2391: $namespace=~s/\W//g;
2392: if ($namespace ne 'roles') {
2393: chomp($what);
2394: my $proname=propath($udom,$uname);
2395: my $now=time;
2396: unless ($namespace=~/^nohist\_/) {
2397: my $hfh;
2398: if (
2399: $hfh=IO::File->new(">>$proname/$namespace.hist")
2400: ) { print $hfh "P:$now:$rid:$what\n"; }
2401: }
2402: my @pairs=split(/\&/,$what);
2403: my %hash;
2404: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2405: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2406: my $key;
2407: $hash{"version:$rid"}++;
2408: my $version=$hash{"version:$rid"};
2409: my $allkeys='';
2410: foreach my $pair (@pairs) {
2411: my ($key,$value)=split(/=/,$pair);
2412: $allkeys.=$key.':';
2413: $hash{"$version:$rid:$key"}=$value;
2414: }
2415: $hash{"$version:$rid:timestamp"}=$now;
2416: $allkeys.='timestamp';
2417: $hash{"$version:keys:$rid"}=$allkeys;
2418: if (untie(%hash)) {
2419: print $client "ok\n";
2420: } else {
2421: print $client "error: ".($!+0)
2422: ." untie(GDBM) Failed ".
2423: "while attempting store\n";
2424: }
2425: } else {
2426: print $client "error: ".($!+0)
2427: ." tie(GDBM) Failed ".
2428: "while attempting store\n";
2429: }
2430: } else {
2431: print $client "refused\n";
2432: }
2433: } else {
2434: Reply($client, "refused\n", $userinput);
2435:
2436: }
2437: # --------------------------------------------------------------------- restore
2438: } elsif ($userinput =~ /^restore/) {
2439: if(isClient) {
2440: my ($cmd,$udom,$uname,$namespace,$rid)
2441: =split(/:/,$userinput);
2442: $namespace=~s/\//\_/g;
2443: $namespace=~s/\W//g;
2444: chomp($rid);
2445: my $proname=propath($udom,$uname);
2446: my $qresult='';
2447: my %hash;
2448: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2449: my $version=$hash{"version:$rid"};
2450: $qresult.="version=$version&";
2451: my $scope;
2452: for ($scope=1;$scope<=$version;$scope++) {
2453: my $vkeys=$hash{"$scope:keys:$rid"};
2454: my @keys=split(/:/,$vkeys);
2455: my $key;
2456: $qresult.="$scope:keys=$vkeys&";
2457: foreach $key (@keys) {
2458: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2459: }
2460: }
2461: if (untie(%hash)) {
2462: $qresult=~s/\&$//;
2463: print $client "$qresult\n";
2464: } else {
2465: print $client "error: ".($!+0)
2466: ." untie(GDBM) Failed ".
2467: "while attempting restore\n";
2468: }
2469: } else {
2470: print $client "error: ".($!+0)
2471: ." tie(GDBM) Failed ".
2472: "while attempting restore\n";
2473: }
2474: } else {
2475: Reply($client, "refused\n", $userinput);
2476:
2477: }
2478: # -------------------------------------------------------------------- chatsend
2479: } elsif ($userinput =~ /^chatsend/) {
2480: if(isClient) {
2481: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2482: &chatadd($cdom,$cnum,$newpost);
2483: print $client "ok\n";
2484: } else {
2485: Reply($client, "refused\n", $userinput);
2486:
2487: }
2488: # -------------------------------------------------------------------- chatretr
2489: } elsif ($userinput =~ /^chatretr/) {
2490: if(isClient) {
2491: my
2492: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2493: my $reply='';
2494: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2495: $reply.=&escape($_).':';
2496: }
2497: $reply=~s/\:$//;
2498: print $client $reply."\n";
2499: } else {
2500: Reply($client, "refused\n", $userinput);
2501:
2502: }
2503: # ------------------------------------------------------------------- querysend
2504: } elsif ($userinput =~ /^querysend/) {
2505: if(isClient) {
2506: my ($cmd,$query,
2507: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2508: $query=~s/\n*$//g;
2509: print $client "".
2510: sqlreply("$clientname\&$query".
2511: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2512: } else {
2513: Reply($client, "refused\n", $userinput);
2514:
2515: }
2516: # ------------------------------------------------------------------ queryreply
2517: } elsif ($userinput =~ /^queryreply/) {
2518: if(isClient) {
2519: my ($cmd,$id,$reply)=split(/:/,$userinput);
2520: my $store;
2521: my $execdir=$perlvar{'lonDaemons'};
2522: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2523: $reply=~s/\&/\n/g;
2524: print $store $reply;
2525: close $store;
2526: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2527: print $store2 "done\n";
2528: close $store2;
2529: print $client "ok\n";
2530: }
2531: else {
2532: print $client "error: ".($!+0)
2533: ." IO::File->new Failed ".
2534: "while attempting queryreply\n";
2535: }
2536: } else {
2537: Reply($client, "refused\n", $userinput);
2538:
2539: }
2540: # ----------------------------------------------------------------- courseidput
2541: } elsif ($userinput =~ /^courseidput/) {
2542: if(isClient) {
2543: my ($cmd,$udom,$what)=split(/:/,$userinput);
2544: chomp($what);
2545: $udom=~s/\W//g;
2546: my $proname=
2547: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2548: my $now=time;
2549: my @pairs=split(/\&/,$what);
2550: my %hash;
2551: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2552: foreach my $pair (@pairs) {
2553: my ($key,$value)=split(/=/,$pair);
2554: $hash{$key}=$value.':'.$now;
2555: }
2556: if (untie(%hash)) {
2557: print $client "ok\n";
2558: } else {
2559: print $client "error: ".($!+0)
2560: ." untie(GDBM) Failed ".
2561: "while attempting courseidput\n";
2562: }
2563: } else {
2564: print $client "error: ".($!+0)
2565: ." tie(GDBM) Failed ".
2566: "while attempting courseidput\n";
2567: }
2568: } else {
2569: Reply($client, "refused\n", $userinput);
2570:
2571: }
2572: # ---------------------------------------------------------------- courseiddump
2573: } elsif ($userinput =~ /^courseiddump/) {
2574: if(isClient) {
2575: my ($cmd,$udom,$since,$description)
2576: =split(/:/,$userinput);
2577: if (defined($description)) {
2578: $description=&unescape($description);
2579: } else {
2580: $description='.';
2581: }
2582: unless (defined($since)) { $since=0; }
2583: my $qresult='';
2584: my $proname=
2585: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2586: my %hash;
2587: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2588: while (my ($key,$value) = each(%hash)) {
2589: my ($descr,$lasttime)=split(/\:/,$value);
2590: if ($lasttime<$since) { next; }
2591: if ($description eq '.') {
2592: $qresult.=$key.'='.$descr.'&';
2593: } else {
2594: my $unescapeVal = &unescape($descr);
2595: if (eval('$unescapeVal=~/$description/i')) {
2596: $qresult.="$key=$descr&";
2597: }
2598: }
2599: }
2600: if (untie(%hash)) {
2601: chop($qresult);
2602: print $client "$qresult\n";
2603: } else {
2604: print $client "error: ".($!+0)
2605: ." untie(GDBM) Failed ".
2606: "while attempting courseiddump\n";
2607: }
2608: } else {
2609: print $client "error: ".($!+0)
2610: ." tie(GDBM) Failed ".
2611: "while attempting courseiddump\n";
2612: }
2613: } else {
2614: Reply($client, "refused\n", $userinput);
2615:
2616: }
2617: # ----------------------------------------------------------------------- idput
2618: } elsif ($userinput =~ /^idput/) {
2619: if(isClient) {
2620: my ($cmd,$udom,$what)=split(/:/,$userinput);
2621: chomp($what);
2622: $udom=~s/\W//g;
2623: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2624: my $now=time;
2625: {
2626: my $hfh;
2627: if (
2628: $hfh=IO::File->new(">>$proname.hist")
2629: ) { print $hfh "P:$now:$what\n"; }
2630: }
2631: my @pairs=split(/\&/,$what);
2632: my %hash;
2633: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2634: foreach my $pair (@pairs) {
2635: my ($key,$value)=split(/=/,$pair);
2636: $hash{$key}=$value;
2637: }
2638: if (untie(%hash)) {
2639: print $client "ok\n";
2640: } else {
2641: print $client "error: ".($!+0)
2642: ." untie(GDBM) Failed ".
2643: "while attempting idput\n";
2644: }
2645: } else {
2646: print $client "error: ".($!+0)
2647: ." tie(GDBM) Failed ".
2648: "while attempting idput\n";
2649: }
2650: } else {
2651: Reply($client, "refused\n", $userinput);
2652:
2653: }
2654: # ----------------------------------------------------------------------- idget
2655: } elsif ($userinput =~ /^idget/) {
2656: if(isClient) {
2657: my ($cmd,$udom,$what)=split(/:/,$userinput);
2658: chomp($what);
2659: $udom=~s/\W//g;
2660: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2661: my @queries=split(/\&/,$what);
2662: my $qresult='';
2663: my %hash;
2664: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2665: for (my $i=0;$i<=$#queries;$i++) {
2666: $qresult.="$hash{$queries[$i]}&";
2667: }
2668: if (untie(%hash)) {
2669: $qresult=~s/\&$//;
2670: print $client "$qresult\n";
2671: } else {
2672: print $client "error: ".($!+0)
2673: ." untie(GDBM) Failed ".
2674: "while attempting idget\n";
2675: }
2676: } else {
2677: print $client "error: ".($!+0)
2678: ." tie(GDBM) Failed ".
2679: "while attempting idget\n";
2680: }
2681: } else {
2682: Reply($client, "refused\n", $userinput);
2683:
2684: }
2685: # ---------------------------------------------------------------------- tmpput
2686: } elsif ($userinput =~ /^tmpput/) {
2687: if(isClient) {
2688: my ($cmd,$what)=split(/:/,$userinput);
2689: my $store;
2690: $tmpsnum++;
2691: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2692: $id=~s/\W/\_/g;
2693: $what=~s/\n//g;
2694: my $execdir=$perlvar{'lonDaemons'};
2695: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2696: print $store $what;
2697: close $store;
2698: print $client "$id\n";
2699: }
2700: else {
2701: print $client "error: ".($!+0)
2702: ."IO::File->new Failed ".
2703: "while attempting tmpput\n";
2704: }
2705: } else {
2706: Reply($client, "refused\n", $userinput);
2707:
2708: }
2709:
2710: # ---------------------------------------------------------------------- tmpget
2711: } elsif ($userinput =~ /^tmpget/) {
2712: if(isClient) {
2713: my ($cmd,$id)=split(/:/,$userinput);
2714: chomp($id);
2715: $id=~s/\W/\_/g;
2716: my $store;
2717: my $execdir=$perlvar{'lonDaemons'};
2718: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2719: my $reply=<$store>;
2720: print $client "$reply\n";
2721: close $store;
2722: }
2723: else {
2724: print $client "error: ".($!+0)
2725: ."IO::File->new Failed ".
2726: "while attempting tmpget\n";
2727: }
2728: } else {
2729: Reply($client, "refused\n", $userinput);
2730:
2731: }
2732: # ---------------------------------------------------------------------- tmpdel
2733: } elsif ($userinput =~ /^tmpdel/) {
2734: if(isClient) {
2735: my ($cmd,$id)=split(/:/,$userinput);
2736: chomp($id);
2737: $id=~s/\W/\_/g;
2738: my $execdir=$perlvar{'lonDaemons'};
2739: if (unlink("$execdir/tmp/$id.tmp")) {
2740: print $client "ok\n";
2741: } else {
2742: print $client "error: ".($!+0)
2743: ."Unlink tmp Failed ".
2744: "while attempting tmpdel\n";
2745: }
2746: } else {
2747: Reply($client, "refused\n", $userinput);
2748:
2749: }
2750: # -------------------------------------------------------------------------- ls
2751: } elsif ($userinput =~ /^ls/) {
2752: if(isClient) {
2753: my $obs;
2754: my $rights;
2755: my ($cmd,$ulsdir)=split(/:/,$userinput);
2756: my $ulsout='';
2757: my $ulsfn;
2758: if (-e $ulsdir) {
2759: if(-d $ulsdir) {
2760: if (opendir(LSDIR,$ulsdir)) {
2761: while ($ulsfn=readdir(LSDIR)) {
2762: undef $obs, $rights;
2763: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2764: #We do some obsolete checking here
2765: if(-e $ulsdir.'/'.$ulsfn.".meta") {
2766: open(FILE, $ulsdir.'/'.$ulsfn.".meta");
2767: my @obsolete=<FILE>;
2768: foreach my $obsolete (@obsolete) {
2769: if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
2770: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
2771: }
2772: }
2773: $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
2774: if($obs eq '1') { $ulsout.="&1"; }
2775: else { $ulsout.="&0"; }
2776: if($rights eq '1') { $ulsout.="&1:"; }
2777: else { $ulsout.="&0:"; }
2778: }
2779: closedir(LSDIR);
2780: }
2781: } else {
2782: my @ulsstats=stat($ulsdir);
2783: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2784: }
2785: } else {
2786: $ulsout='no_such_dir';
2787: }
2788: if ($ulsout eq '') { $ulsout='empty'; }
2789: print $client "$ulsout\n";
2790: } else {
2791: Reply($client, "refused\n", $userinput);
2792:
2793: }
2794: # ----------------------------------------------------------------- setannounce
2795: } elsif ($userinput =~ /^setannounce/) {
2796: if (isClient) {
2797: my ($cmd,$announcement)=split(/:/,$userinput);
2798: chomp($announcement);
2799: $announcement=&unescape($announcement);
2800: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2801: '/announcement.txt')) {
2802: print $store $announcement;
2803: close $store;
2804: print $client "ok\n";
2805: } else {
2806: print $client "error: ".($!+0)."\n";
2807: }
2808: } else {
2809: Reply($client, "refused\n", $userinput);
2810:
2811: }
2812: # ------------------------------------------------------------------ Hanging up
2813: } elsif (($userinput =~ /^exit/) ||
2814: ($userinput =~ /^init/)) { # no restrictions.
2815: &logthis(
2816: "Client $clientip ($clientname) hanging up: $userinput");
2817: print $client "bye\n";
2818: $client->shutdown(2); # shutdown the socket forcibly.
2819: $client->close();
2820: last;
1.161 foxr 2821:
1.178 foxr 2822: # ---------------------------------- set current host/domain
2823: } elsif ($userinput =~ /^sethost:/) {
2824: if (isClient) {
2825: print $client &sethost($userinput)."\n";
2826: } else {
2827: print $client "refused\n";
2828: }
2829: #---------------------------------- request file (?) version.
2830: } elsif ($userinput =~/^version:/) {
2831: if (isClient) {
2832: print $client &version($userinput)."\n";
2833: } else {
2834: print $client "refused\n";
2835: }
2836: # ------------------------------------------------------------- unknown command
1.161 foxr 2837:
1.178 foxr 2838: } else {
2839: # unknown command
2840: print $client "unknown_cmd\n";
2841: }
1.177 foxr 2842: # -------------------------------------------------------------------- complete
1.178 foxr 2843: alarm(0);
1.161 foxr 2844: &status('Listening to '.$clientname);
2845: }
1.59 www 2846: # --------------------------------------------- client unknown or fishy, refuse
1.161 foxr 2847: } else {
2848: print $client "refused\n";
2849: $client->close();
2850: &logthis("<font color=blue>WARNING: "
2851: ."Rejected client $clientip, closing connection</font>");
2852: }
2853: }
2854:
1.1 albertel 2855: # =============================================================================
1.161 foxr 2856:
2857: &logthis("<font color=red>CRITICAL: "
2858: ."Disconnect from $clientip ($clientname)</font>");
2859:
2860:
2861: # this exit is VERY important, otherwise the child will become
2862: # a producer of more and more children, forking yourself into
2863: # process death.
2864: exit;
1.106 foxr 2865:
1.78 foxr 2866: }
2867:
2868:
2869: #
2870: # Checks to see if the input roleput request was to set
2871: # an author role. If so, invokes the lchtmldir script to set
2872: # up a correct public_html
2873: # Parameters:
2874: # request - The request sent to the rolesput subchunk.
2875: # We're looking for /domain/_au
2876: # domain - The domain in which the user is having roles doctored.
2877: # user - Name of the user for which the role is being put.
2878: # authtype - The authentication type associated with the user.
2879: #
2880: sub ManagePermissions
2881: {
2882: my $request = shift;
2883: my $domain = shift;
2884: my $user = shift;
2885: my $authtype= shift;
2886:
2887: # See if the request is of the form /$domain/_au
2888: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
2889: my $execdir = $perlvar{'lonDaemons'};
2890: my $userhome= "/home/$user" ;
1.134 albertel 2891: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78 foxr 2892: system("$execdir/lchtmldir $userhome $user $authtype");
2893: }
2894: }
2895: #
2896: # GetAuthType - Determines the authorization type of a user in a domain.
2897:
2898: # Returns the authorization type or nouser if there is no such user.
2899: #
2900: sub GetAuthType
2901: {
2902: my $domain = shift;
2903: my $user = shift;
2904:
1.79 foxr 2905: Debug("GetAuthType( $domain, $user ) \n");
1.78 foxr 2906: my $proname = &propath($domain, $user);
2907: my $passwdfile = "$proname/passwd";
2908: if( -e $passwdfile ) {
2909: my $pf = IO::File->new($passwdfile);
2910: my $realpassword = <$pf>;
2911: chomp($realpassword);
1.79 foxr 2912: Debug("Password info = $realpassword\n");
1.78 foxr 2913: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 2914: Debug("Authtype = $authtype, content = $contentpwd\n");
1.78 foxr 2915: my $availinfo = '';
1.91 albertel 2916: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78 foxr 2917: $availinfo = $contentpwd;
2918: }
1.79 foxr 2919:
1.78 foxr 2920: return "$authtype:$availinfo";
2921: }
2922: else {
1.79 foxr 2923: Debug("Returning nouser");
1.78 foxr 2924: return "nouser";
2925: }
1.1 albertel 2926: }
2927:
1.84 albertel 2928: sub addline {
2929: my ($fname,$hostid,$ip,$newline)=@_;
2930: my $contents;
2931: my $found=0;
2932: my $expr='^'.$hostid.':'.$ip.':';
2933: $expr =~ s/\./\\\./g;
1.134 albertel 2934: my $sh;
1.84 albertel 2935: if ($sh=IO::File->new("$fname.subscription")) {
2936: while (my $subline=<$sh>) {
2937: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
2938: }
2939: $sh->close();
2940: }
2941: $sh=IO::File->new(">$fname.subscription");
2942: if ($contents) { print $sh $contents; }
2943: if ($newline) { print $sh $newline; }
2944: $sh->close();
2945: return $found;
1.86 www 2946: }
2947:
2948: sub getchat {
1.122 www 2949: my ($cdom,$cname,$udom,$uname)=@_;
1.87 www 2950: my %hash;
2951: my $proname=&propath($cdom,$cname);
2952: my @entries=();
1.88 albertel 2953: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2954: &GDBM_READER(),0640)) {
2955: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2956: untie %hash;
1.123 www 2957: }
1.124 www 2958: my @participants=();
1.134 albertel 2959: my $cutoff=time-60;
1.123 www 2960: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124 www 2961: &GDBM_WRCREAT(),0640)) {
2962: $hash{$uname.':'.$udom}=time;
1.123 www 2963: foreach (sort keys %hash) {
2964: if ($hash{$_}>$cutoff) {
1.124 www 2965: $participants[$#participants+1]='active_participant:'.$_;
1.123 www 2966: }
2967: }
2968: untie %hash;
1.86 www 2969: }
1.124 www 2970: return (@participants,@entries);
1.86 www 2971: }
2972:
2973: sub chatadd {
1.88 albertel 2974: my ($cdom,$cname,$newchat)=@_;
2975: my %hash;
2976: my $proname=&propath($cdom,$cname);
2977: my @entries=();
1.142 www 2978: my $time=time;
1.88 albertel 2979: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2980: &GDBM_WRCREAT(),0640)) {
2981: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2982: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
2983: my ($thentime,$idnum)=split(/\_/,$lastid);
2984: my $newid=$time.'_000000';
2985: if ($thentime==$time) {
2986: $idnum=~s/^0+//;
2987: $idnum++;
2988: $idnum=substr('000000'.$idnum,-6,6);
2989: $newid=$time.'_'.$idnum;
2990: }
2991: $hash{$newid}=$newchat;
2992: my $expired=$time-3600;
2993: foreach (keys %hash) {
2994: my ($thistime)=($_=~/(\d+)\_/);
2995: if ($thistime<$expired) {
1.89 www 2996: delete $hash{$_};
1.88 albertel 2997: }
2998: }
2999: untie %hash;
1.142 www 3000: }
3001: {
3002: my $hfh;
3003: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
3004: print $hfh "$time:".&unescape($newchat)."\n";
3005: }
1.86 www 3006: }
1.84 albertel 3007: }
3008:
3009: sub unsub {
3010: my ($fname,$clientip)=@_;
3011: my $result;
1.161 foxr 3012: if (unlink("$fname.$clientname")) {
1.84 albertel 3013: $result="ok\n";
3014: } else {
3015: $result="not_subscribed\n";
3016: }
3017: if (-e "$fname.subscription") {
1.161 foxr 3018: my $found=&addline($fname,$clientname,$clientip,'');
1.84 albertel 3019: if ($found) { $result="ok\n"; }
3020: } else {
3021: if ($result != "ok\n") { $result="not_subscribed\n"; }
3022: }
3023: return $result;
3024: }
3025:
1.101 www 3026: sub currentversion {
3027: my $fname=shift;
3028: my $version=-1;
3029: my $ulsdir='';
3030: if ($fname=~/^(.+)\/[^\/]+$/) {
3031: $ulsdir=$1;
3032: }
1.114 albertel 3033: my ($fnamere1,$fnamere2);
3034: # remove version if already specified
1.101 www 3035: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114 albertel 3036: # get the bits that go before and after the version number
3037: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
3038: $fnamere1=$1;
3039: $fnamere2='.'.$2;
3040: }
1.101 www 3041: if (-e $fname) { $version=1; }
3042: if (-e $ulsdir) {
1.134 albertel 3043: if(-d $ulsdir) {
3044: if (opendir(LSDIR,$ulsdir)) {
3045: my $ulsfn;
3046: while ($ulsfn=readdir(LSDIR)) {
1.101 www 3047: # see if this is a regular file (ignore links produced earlier)
1.134 albertel 3048: my $thisfile=$ulsdir.'/'.$ulsfn;
3049: unless (-l $thisfile) {
1.160 www 3050: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134 albertel 3051: if ($1>$version) { $version=$1; }
3052: }
3053: }
3054: }
3055: closedir(LSDIR);
3056: $version++;
3057: }
3058: }
3059: }
3060: return $version;
1.101 www 3061: }
3062:
3063: sub thisversion {
3064: my $fname=shift;
3065: my $version=-1;
3066: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
3067: $version=$1;
3068: }
3069: return $version;
3070: }
3071:
1.84 albertel 3072: sub subscribe {
3073: my ($userinput,$clientip)=@_;
3074: my $result;
3075: my ($cmd,$fname)=split(/:/,$userinput);
3076: my $ownership=&ishome($fname);
3077: if ($ownership eq 'owner') {
1.101 www 3078: # explitly asking for the current version?
3079: unless (-e $fname) {
3080: my $currentversion=¤tversion($fname);
3081: if (&thisversion($fname)==$currentversion) {
3082: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
3083: my $root=$1;
3084: my $extension=$2;
3085: symlink($root.'.'.$extension,
3086: $root.'.'.$currentversion.'.'.$extension);
1.102 www 3087: unless ($extension=~/\.meta$/) {
3088: symlink($root.'.'.$extension.'.meta',
3089: $root.'.'.$currentversion.'.'.$extension.'.meta');
3090: }
1.101 www 3091: }
3092: }
3093: }
1.84 albertel 3094: if (-e $fname) {
3095: if (-d $fname) {
3096: $result="directory\n";
3097: } else {
1.161 foxr 3098: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134 albertel 3099: my $now=time;
1.161 foxr 3100: my $found=&addline($fname,$clientname,$clientip,
3101: "$clientname:$clientip:$now\n");
1.84 albertel 3102: if ($found) { $result="$fname\n"; }
3103: # if they were subscribed to only meta data, delete that
3104: # subscription, when you subscribe to a file you also get
3105: # the metadata
3106: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
3107: $fname=~s/\/home\/httpd\/html\/res/raw/;
3108: $fname="http://$thisserver/".$fname;
3109: $result="$fname\n";
3110: }
3111: } else {
3112: $result="not_found\n";
3113: }
3114: } else {
3115: $result="rejected\n";
3116: }
3117: return $result;
3118: }
1.91 albertel 3119:
3120: sub make_passwd_file {
1.98 foxr 3121: my ($uname, $umode,$npass,$passfilename)=@_;
1.91 albertel 3122: my $result="ok\n";
3123: if ($umode eq 'krb4' or $umode eq 'krb5') {
3124: {
3125: my $pf = IO::File->new(">$passfilename");
3126: print $pf "$umode:$npass\n";
3127: }
3128: } elsif ($umode eq 'internal') {
3129: my $salt=time;
3130: $salt=substr($salt,6,2);
3131: my $ncpass=crypt($npass,$salt);
3132: {
3133: &Debug("Creating internal auth");
3134: my $pf = IO::File->new(">$passfilename");
3135: print $pf "internal:$ncpass\n";
3136: }
3137: } elsif ($umode eq 'localauth') {
3138: {
3139: my $pf = IO::File->new(">$passfilename");
3140: print $pf "localauth:$npass\n";
3141: }
3142: } elsif ($umode eq 'unix') {
3143: {
3144: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
3145: {
3146: &Debug("Executing external: ".$execpath);
1.98 foxr 3147: &Debug("user = ".$uname.", Password =". $npass);
1.132 matthew 3148: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91 albertel 3149: print $se "$uname\n";
3150: print $se "$npass\n";
3151: print $se "$npass\n";
1.97 foxr 3152: }
3153: my $useraddok = $?;
3154: if($useraddok > 0) {
3155: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1.91 albertel 3156: }
3157: my $pf = IO::File->new(">$passfilename");
3158: print $pf "unix:\n";
3159: }
3160: } elsif ($umode eq 'none') {
3161: {
3162: my $pf = IO::File->new(">$passfilename");
3163: print $pf "none:\n";
3164: }
3165: } else {
3166: $result="auth_mode_error\n";
3167: }
3168: return $result;
1.121 albertel 3169: }
3170:
3171: sub sethost {
3172: my ($remotereq) = @_;
3173: my (undef,$hostid)=split(/:/,$remotereq);
3174: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
3175: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
3176: $currenthostid=$hostid;
3177: $currentdomainid=$hostdom{$hostid};
3178: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
3179: } else {
3180: &logthis("Requested host id $hostid not an alias of ".
3181: $perlvar{'lonHostID'}." refusing connection");
3182: return 'unable_to_set';
3183: }
3184: return 'ok';
3185: }
3186:
3187: sub version {
3188: my ($userinput)=@_;
3189: $remoteVERSION=(split(/:/,$userinput))[1];
3190: return "version:$VERSION";
1.127 albertel 3191: }
1.178 foxr 3192:
1.128 albertel 3193: #There is a copy of this in lonnet.pm
1.127 albertel 3194: sub userload {
3195: my $numusers=0;
3196: {
3197: opendir(LONIDS,$perlvar{'lonIDsDir'});
3198: my $filename;
3199: my $curtime=time;
3200: while ($filename=readdir(LONIDS)) {
3201: if ($filename eq '.' || $filename eq '..') {next;}
1.138 albertel 3202: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159 albertel 3203: if ($curtime-$mtime < 1800) { $numusers++; }
1.127 albertel 3204: }
3205: closedir(LONIDS);
3206: }
3207: my $userloadpercent=0;
3208: my $maxuserload=$perlvar{'lonUserLoadLim'};
3209: if ($maxuserload) {
1.129 albertel 3210: $userloadpercent=100*$numusers/$maxuserload;
1.127 albertel 3211: }
1.130 albertel 3212: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127 albertel 3213: return $userloadpercent;
1.91 albertel 3214: }
3215:
1.61 harris41 3216: # ----------------------------------- POD (plain old documentation, CPAN style)
3217:
3218: =head1 NAME
3219:
3220: lond - "LON Daemon" Server (port "LOND" 5663)
3221:
3222: =head1 SYNOPSIS
3223:
1.74 harris41 3224: Usage: B<lond>
3225:
3226: Should only be run as user=www. This is a command-line script which
3227: is invoked by B<loncron>. There is no expectation that a typical user
3228: will manually start B<lond> from the command-line. (In other words,
3229: DO NOT START B<lond> YOURSELF.)
1.61 harris41 3230:
3231: =head1 DESCRIPTION
3232:
1.74 harris41 3233: There are two characteristics associated with the running of B<lond>,
3234: PROCESS MANAGEMENT (starting, stopping, handling child processes)
3235: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
3236: subscriptions, etc). These are described in two large
3237: sections below.
3238:
3239: B<PROCESS MANAGEMENT>
3240:
1.61 harris41 3241: Preforker - server who forks first. Runs as a daemon. HUPs.
3242: Uses IDEA encryption
3243:
1.74 harris41 3244: B<lond> forks off children processes that correspond to the other servers
3245: in the network. Management of these processes can be done at the
3246: parent process level or the child process level.
3247:
3248: B<logs/lond.log> is the location of log messages.
3249:
3250: The process management is now explained in terms of linux shell commands,
3251: subroutines internal to this code, and signal assignments:
3252:
3253: =over 4
3254:
3255: =item *
3256:
3257: PID is stored in B<logs/lond.pid>
3258:
3259: This is the process id number of the parent B<lond> process.
3260:
3261: =item *
3262:
3263: SIGTERM and SIGINT
3264:
3265: Parent signal assignment:
3266: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
3267:
3268: Child signal assignment:
3269: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
3270: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
3271: to restart a new child.)
3272:
3273: Command-line invocations:
3274: B<kill> B<-s> SIGTERM I<PID>
3275: B<kill> B<-s> SIGINT I<PID>
3276:
3277: Subroutine B<HUNTSMAN>:
3278: This is only invoked for the B<lond> parent I<PID>.
3279: This kills all the children, and then the parent.
3280: The B<lonc.pid> file is cleared.
3281:
3282: =item *
3283:
3284: SIGHUP
3285:
3286: Current bug:
3287: This signal can only be processed the first time
3288: on the parent process. Subsequent SIGHUP signals
3289: have no effect.
3290:
3291: Parent signal assignment:
3292: $SIG{HUP} = \&HUPSMAN;
3293:
3294: Child signal assignment:
3295: none (nothing happens)
3296:
3297: Command-line invocations:
3298: B<kill> B<-s> SIGHUP I<PID>
3299:
3300: Subroutine B<HUPSMAN>:
3301: This is only invoked for the B<lond> parent I<PID>,
3302: This kills all the children, and then the parent.
3303: The B<lond.pid> file is cleared.
3304:
3305: =item *
3306:
3307: SIGUSR1
3308:
3309: Parent signal assignment:
3310: $SIG{USR1} = \&USRMAN;
3311:
3312: Child signal assignment:
3313: $SIG{USR1}= \&logstatus;
3314:
3315: Command-line invocations:
3316: B<kill> B<-s> SIGUSR1 I<PID>
3317:
3318: Subroutine B<USRMAN>:
3319: When invoked for the B<lond> parent I<PID>,
3320: SIGUSR1 is sent to all the children, and the status of
3321: each connection is logged.
1.144 foxr 3322:
3323: =item *
3324:
3325: SIGUSR2
3326:
3327: Parent Signal assignment:
3328: $SIG{USR2} = \&UpdateHosts
3329:
3330: Child signal assignment:
3331: NONE
3332:
1.74 harris41 3333:
3334: =item *
3335:
3336: SIGCHLD
3337:
3338: Parent signal assignment:
3339: $SIG{CHLD} = \&REAPER;
3340:
3341: Child signal assignment:
3342: none
3343:
3344: Command-line invocations:
3345: B<kill> B<-s> SIGCHLD I<PID>
3346:
3347: Subroutine B<REAPER>:
3348: This is only invoked for the B<lond> parent I<PID>.
3349: Information pertaining to the child is removed.
3350: The socket port is cleaned up.
3351:
3352: =back
3353:
3354: B<SERVER-SIDE ACTIVITIES>
3355:
3356: Server-side information can be accepted in an encrypted or non-encrypted
3357: method.
3358:
3359: =over 4
3360:
3361: =item ping
3362:
3363: Query a client in the hosts.tab table; "Are you there?"
3364:
3365: =item pong
3366:
3367: Respond to a ping query.
3368:
3369: =item ekey
3370:
3371: Read in encrypted key, make cipher. Respond with a buildkey.
3372:
3373: =item load
3374:
3375: Respond with CPU load based on a computation upon /proc/loadavg.
3376:
3377: =item currentauth
3378:
3379: Reply with current authentication information (only over an
3380: encrypted channel).
3381:
3382: =item auth
3383:
3384: Only over an encrypted channel, reply as to whether a user's
3385: authentication information can be validated.
3386:
3387: =item passwd
3388:
3389: Allow for a password to be set.
3390:
3391: =item makeuser
3392:
3393: Make a user.
3394:
3395: =item passwd
3396:
3397: Allow for authentication mechanism and password to be changed.
3398:
3399: =item home
1.61 harris41 3400:
1.74 harris41 3401: Respond to a question "are you the home for a given user?"
3402:
3403: =item update
3404:
3405: Update contents of a subscribed resource.
3406:
3407: =item unsubscribe
3408:
3409: The server is unsubscribing from a resource.
3410:
3411: =item subscribe
3412:
3413: The server is subscribing to a resource.
3414:
3415: =item log
3416:
3417: Place in B<logs/lond.log>
3418:
3419: =item put
3420:
3421: stores hash in namespace
3422:
3423: =item rolesput
3424:
3425: put a role into a user's environment
3426:
3427: =item get
3428:
3429: returns hash with keys from array
3430: reference filled in from namespace
3431:
3432: =item eget
3433:
3434: returns hash with keys from array
3435: reference filled in from namesp (encrypts the return communication)
3436:
3437: =item rolesget
3438:
3439: get a role from a user's environment
3440:
3441: =item del
3442:
3443: deletes keys out of array from namespace
3444:
3445: =item keys
3446:
3447: returns namespace keys
3448:
3449: =item dump
3450:
3451: dumps the complete (or key matching regexp) namespace into a hash
3452:
3453: =item store
3454:
3455: stores hash permanently
3456: for this url; hashref needs to be given and should be a \%hashname; the
3457: remaining args aren't required and if they aren't passed or are '' they will
3458: be derived from the ENV
3459:
3460: =item restore
3461:
3462: returns a hash for a given url
3463:
3464: =item querysend
3465:
3466: Tells client about the lonsql process that has been launched in response
3467: to a sent query.
3468:
3469: =item queryreply
3470:
3471: Accept information from lonsql and make appropriate storage in temporary
3472: file space.
3473:
3474: =item idput
3475:
3476: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
3477: for each student, defined perhaps by the institutional Registrar.)
3478:
3479: =item idget
3480:
3481: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
3482: for each student, defined perhaps by the institutional Registrar.)
3483:
3484: =item tmpput
3485:
3486: Accept and store information in temporary space.
3487:
3488: =item tmpget
3489:
3490: Send along temporarily stored information.
3491:
3492: =item ls
3493:
3494: List part of a user's directory.
3495:
1.135 foxr 3496: =item pushtable
3497:
3498: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
3499: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
3500: must be restored manually in case of a problem with the new table file.
3501: pushtable requires that the request be encrypted and validated via
3502: ValidateManager. The form of the command is:
3503: enc:pushtable tablename <tablecontents> \n
3504: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
3505: cleartext newline.
3506:
1.74 harris41 3507: =item Hanging up (exit or init)
3508:
3509: What to do when a client tells the server that they (the client)
3510: are leaving the network.
3511:
3512: =item unknown command
3513:
3514: If B<lond> is sent an unknown command (not in the list above),
3515: it replys to the client "unknown_cmd".
1.135 foxr 3516:
1.74 harris41 3517:
3518: =item UNKNOWN CLIENT
3519:
3520: If the anti-spoofing algorithm cannot verify the client,
3521: the client is rejected (with a "refused" message sent
3522: to the client, and the connection is closed.
3523:
3524: =back
1.61 harris41 3525:
3526: =head1 PREREQUISITES
3527:
3528: IO::Socket
3529: IO::File
3530: Apache::File
3531: Symbol
3532: POSIX
3533: Crypt::IDEA
3534: LWP::UserAgent()
3535: GDBM_File
3536: Authen::Krb4
1.91 albertel 3537: Authen::Krb5
1.61 harris41 3538:
3539: =head1 COREQUISITES
3540:
3541: =head1 OSNAMES
3542:
3543: linux
3544:
3545: =head1 SCRIPT CATEGORIES
3546:
3547: Server/Process
3548:
3549: =cut
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