1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.166 2003/12/22 11:03:37 foxr Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27:
28:
29: # http://www.lon-capa.org/
30: #
31:
32: use strict;
33: use lib '/home/httpd/lib/perl/';
34: use LONCAPA::Configuration;
35:
36: use IO::Socket;
37: use IO::File;
38: #use Apache::File;
39: use Symbol;
40: use POSIX;
41: use Crypt::IDEA;
42: use LWP::UserAgent();
43: use GDBM_File;
44: use Authen::Krb4;
45: use Authen::Krb5;
46: use lib '/home/httpd/lib/perl/';
47: use localauth;
48: use File::Copy;
49:
50: my $DEBUG = 0; # Non zero to enable debug log entries.
51:
52: my $status='';
53: my $lastlog='';
54:
55: my $VERSION='$Revision: 1.166 $'; #' stupid emacs
56: my $remoteVERSION;
57: my $currenthostid;
58: my $currentdomainid;
59:
60: my $client;
61: my $clientip;
62: my $clientname;
63:
64: my $server;
65: my $thisserver;
66:
67: #
68: # Connection type is:
69: # client - All client actions are allowed
70: # manager - only management functions allowed.
71: # both - Both management and client actions are allowed
72: #
73:
74: my $ConnectionType;
75:
76: my %hostid;
77: my %hostdom;
78: my %hostip;
79:
80: my %managers; # Ip -> manager names
81:
82: my %perlvar; # Will have the apache conf defined perl vars.
83:
84: #
85: # The array below are password error strings."
86: #
87: my $lastpwderror = 13; # Largest error number from lcpasswd.
88: my @passwderrors = ("ok",
89: "lcpasswd must be run as user 'www'",
90: "lcpasswd got incorrect number of arguments",
91: "lcpasswd did not get the right nubmer of input text lines",
92: "lcpasswd too many simultaneous pwd changes in progress",
93: "lcpasswd User does not exist.",
94: "lcpasswd Incorrect current passwd",
95: "lcpasswd Unable to su to root.",
96: "lcpasswd Cannot set new passwd.",
97: "lcpasswd Username has invalid characters",
98: "lcpasswd Invalid characters in password",
99: "11", "12",
100: "lcpasswd Password mismatch");
101:
102:
103: # The array below are lcuseradd error strings.:
104:
105: my $lastadderror = 13;
106: my @adderrors = ("ok",
107: "User ID mismatch, lcuseradd must run as user www",
108: "lcuseradd Incorrect number of command line parameters must be 3",
109: "lcuseradd Incorrect number of stdinput lines, must be 3",
110: "lcuseradd Too many other simultaneous pwd changes in progress",
111: "lcuseradd User does not exist",
112: "lcuseradd Unable to make www member of users's group",
113: "lcuseradd Unable to su to root",
114: "lcuseradd Unable to set password",
115: "lcuseradd Usrname has invalid characters",
116: "lcuseradd Password has an invalid character",
117: "lcuseradd User already exists",
118: "lcuseradd Could not add user.",
119: "lcuseradd Password mismatch");
120:
121:
122: #
123: # GetCertificate: Given a transaction that requires a certificate,
124: # this function will extract the certificate from the transaction
125: # request. Note that at this point, the only concept of a certificate
126: # is the hostname to which we are connected.
127: #
128: # Parameter:
129: # request - The request sent by our client (this parameterization may
130: # need to change when we really use a certificate granting
131: # authority.
132: #
133: sub GetCertificate {
134: my $request = shift;
135:
136: return $clientip;
137: }
138:
139: #
140: # Return true if client is a manager.
141: #
142: sub isManager {
143: return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
144: }
145: #
146: # Return tru if client can do client functions
147: #
148: sub isClient {
149: return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
150: }
151:
152:
153: #
154: # ReadManagerTable: Reads in the current manager table. For now this is
155: # done on each manager authentication because:
156: # - These authentications are not frequent
157: # - This allows dynamic changes to the manager table
158: # without the need to signal to the lond.
159: #
160:
161: sub ReadManagerTable {
162:
163: # Clean out the old table first..
164:
165: foreach my $key (keys %managers) {
166: delete $managers{$key};
167: }
168:
169: my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
170: if (!open (MANAGERS, $tablename)) {
171: logthis('<font color="red">No manager table. Nobody can manage!!</font>');
172: return;
173: }
174: while(my $host = <MANAGERS>) {
175: chomp($host);
176: if ($host =~ "^#") { # Comment line.
177: logthis('<font color="green"> Skipping line: '. "$host</font>\n");
178: next;
179: }
180: if (!defined $hostip{$host}) { # This is a non cluster member
181: # The entry is of the form:
182: # cluname:hostname
183: # cluname - A 'cluster hostname' is needed in order to negotiate
184: # the host key.
185: # hostname- The dns name of the host.
186: #
187: my($cluname, $dnsname) = split(/:/, $host);
188:
189: my $ip = gethostbyname($dnsname);
190: if(defined($ip)) { # bad names don't deserve entry.
191: my $hostip = inet_ntoa($ip);
192: $managers{$hostip} = $cluname;
193: logthis('<font color="green"> registering manager '.
194: "$dnsname as $cluname with $hostip </font>\n");
195: }
196: } else {
197: logthis('<font color="green"> existing host'." $host</font>\n");
198: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
199: }
200: }
201: }
202:
203: #
204: # ValidManager: Determines if a given certificate represents a valid manager.
205: # in this primitive implementation, the 'certificate' is
206: # just the connecting loncapa client name. This is checked
207: # against a valid client list in the configuration.
208: #
209: #
210: sub ValidManager {
211: my $certificate = shift;
212:
213: return isManager;
214: }
215: #
216: # CopyFile: Called as part of the process of installing a
217: # new configuration file. This function copies an existing
218: # file to a backup file.
219: # Parameters:
220: # oldfile - Name of the file to backup.
221: # newfile - Name of the backup file.
222: # Return:
223: # 0 - Failure (errno has failure reason).
224: # 1 - Success.
225: #
226: sub CopyFile {
227: my $oldfile = shift;
228: my $newfile = shift;
229:
230: # The file must exist:
231:
232: if(-e $oldfile) {
233:
234: # Read the old file.
235:
236: my $oldfh = IO::File->new("< $oldfile");
237: if(!$oldfh) {
238: return 0;
239: }
240: my @contents = <$oldfh>; # Suck in the entire file.
241:
242: # write the backup file:
243:
244: my $newfh = IO::File->new("> $newfile");
245: if(!(defined $newfh)){
246: return 0;
247: }
248: my $lines = scalar @contents;
249: for (my $i =0; $i < $lines; $i++) {
250: print $newfh ($contents[$i]);
251: }
252:
253: $oldfh->close;
254: $newfh->close;
255:
256: chmod(0660, $newfile);
257:
258: return 1;
259:
260: } else {
261: return 0;
262: }
263: }
264: #
265: # Host files are passed out with externally visible host IPs.
266: # If, for example, we are behind a fire-wall or NAT host, our
267: # internally visible IP may be different than the externally
268: # visible IP. Therefore, we always adjust the contents of the
269: # host file so that the entry for ME is the IP that we believe
270: # we have. At present, this is defined as the entry that
271: # DNS has for us. If by some chance we are not able to get a
272: # DNS translation for us, then we assume that the host.tab file
273: # is correct.
274: # BUGBUGBUG - in the future, we really should see if we can
275: # easily query the interface(s) instead.
276: # Parameter(s):
277: # contents - The contents of the host.tab to check.
278: # Returns:
279: # newcontents - The adjusted contents.
280: #
281: #
282: sub AdjustHostContents {
283: my $contents = shift;
284: my $adjusted;
285: my $me = $perlvar{'lonHostID'};
286:
287: foreach my $line (split(/\n/,$contents)) {
288: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
289: chomp($line);
290: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
291: if ($id eq $me) {
292: my $ip = gethostbyname($name);
293: my $ipnew = inet_ntoa($ip);
294: $ip = $ipnew;
295: # Reconstruct the host line and append to adjusted:
296:
297: my $newline = "$id:$domain:$role:$name:$ip";
298: if($maxcon ne "") { # Not all hosts have loncnew tuning params
299: $newline .= ":$maxcon:$idleto:$mincon";
300: }
301: $adjusted .= $newline."\n";
302:
303: } else { # Not me, pass unmodified.
304: $adjusted .= $line."\n";
305: }
306: } else { # Blank or comment never re-written.
307: $adjusted .= $line."\n"; # Pass blanks and comments as is.
308: }
309: }
310: return $adjusted;
311: }
312: #
313: # InstallFile: Called to install an administrative file:
314: # - The file is created with <name>.tmp
315: # - The <name>.tmp file is then mv'd to <name>
316: # This lugubrious procedure is done to ensure that we are never without
317: # a valid, even if dated, version of the file regardless of who crashes
318: # and when the crash occurs.
319: #
320: # Parameters:
321: # Name of the file
322: # File Contents.
323: # Return:
324: # nonzero - success.
325: # 0 - failure and $! has an errno.
326: #
327: sub InstallFile {
328: my $Filename = shift;
329: my $Contents = shift;
330: my $TempFile = $Filename.".tmp";
331:
332: # Open the file for write:
333:
334: my $fh = IO::File->new("> $TempFile"); # Write to temp.
335: if(!(defined $fh)) {
336: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
337: return 0;
338: }
339: # write the contents of the file:
340:
341: print $fh ($Contents);
342: $fh->close; # In case we ever have a filesystem w. locking
343:
344: chmod(0660, $TempFile);
345:
346: # Now we can move install the file in position.
347:
348: move($TempFile, $Filename);
349:
350: return 1;
351: }
352:
353: #
354: # PushFile: Called to do an administrative push of a file.
355: # - Ensure the file being pushed is one we support.
356: # - Backup the old file to <filename.saved>
357: # - Separate the contents of the new file out from the
358: # rest of the request.
359: # - Write the new file.
360: # Parameter:
361: # Request - The entire user request. This consists of a : separated
362: # string pushfile:tablename:contents.
363: # NOTE: The contents may have :'s in it as well making things a bit
364: # more interesting... but not much.
365: # Returns:
366: # String to send to client ("ok" or "refused" if bad file).
367: #
368: sub PushFile {
369: my $request = shift;
370: my ($command, $filename, $contents) = split(":", $request, 3);
371:
372: # At this point in time, pushes for only the following tables are
373: # supported:
374: # hosts.tab ($filename eq host).
375: # domain.tab ($filename eq domain).
376: # Construct the destination filename or reject the request.
377: #
378: # lonManage is supposed to ensure this, however this session could be
379: # part of some elaborate spoof that managed somehow to authenticate.
380: #
381:
382: my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
383: if ($filename eq "host") {
384: $tablefile .= "hosts.tab";
385: } elsif ($filename eq "domain") {
386: $tablefile .= "domain.tab";
387: } else {
388: return "refused";
389: }
390: #
391: # >copy< the old table to the backup table
392: # don't rename in case system crashes/reboots etc. in the time
393: # window between a rename and write.
394: #
395: my $backupfile = $tablefile;
396: $backupfile =~ s/\.tab$/.old/;
397: if(!CopyFile($tablefile, $backupfile)) {
398: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
399: return "error:$!";
400: }
401: &logthis('<font color="green"> Pushfile: backed up '
402: .$tablefile." to $backupfile</font>");
403:
404: # If the file being pushed is the host file, we adjust the entry for ourself so that the
405: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
406: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
407: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
408: # that possibilty.
409:
410: if($filename eq "host") {
411: $contents = AdjustHostContents($contents);
412: }
413:
414: # Install the new file:
415:
416: if(!InstallFile($tablefile, $contents)) {
417: &logthis('<font color="red"> Pushfile: unable to install '
418: .$tablefile." $! </font>");
419: return "error:$!";
420: }
421: else {
422: &logthis('<font color="green"> Installed new '.$tablefile
423: ."</font>");
424:
425: }
426:
427:
428: # Indicate success:
429:
430: return "ok";
431:
432: }
433:
434: #
435: # Called to re-init either lonc or lond.
436: #
437: # Parameters:
438: # request - The full request by the client. This is of the form
439: # reinit:<process>
440: # where <process> is allowed to be either of
441: # lonc or lond
442: #
443: # Returns:
444: # The string to be sent back to the client either:
445: # ok - Everything worked just fine.
446: # error:why - There was a failure and why describes the reason.
447: #
448: #
449: sub ReinitProcess {
450: my $request = shift;
451:
452:
453: # separate the request (reinit) from the process identifier and
454: # validate it producing the name of the .pid file for the process.
455: #
456: #
457: my ($junk, $process) = split(":", $request);
458: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
459: if($process eq 'lonc') {
460: $processpidfile = $processpidfile."lonc.pid";
461: if (!open(PIDFILE, "< $processpidfile")) {
462: return "error:Open failed for $processpidfile";
463: }
464: my $loncpid = <PIDFILE>;
465: close(PIDFILE);
466: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
467: ."</font>");
468: kill("USR2", $loncpid);
469: } elsif ($process eq 'lond') {
470: logthis('<font color="red"> Reinitializing self (lond) </font>');
471: &UpdateHosts; # Lond is us!!
472: } else {
473: &logthis('<font color="yellow" Invalid reinit request for '.$process
474: ."</font>");
475: return "error:Invalid process identifier $process";
476: }
477: return 'ok';
478: }
479:
480: #
481: # Convert an error return code from lcpasswd to a string value.
482: #
483: sub lcpasswdstrerror {
484: my $ErrorCode = shift;
485: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
486: return "lcpasswd Unrecognized error return value ".$ErrorCode;
487: } else {
488: return $passwderrors[$ErrorCode];
489: }
490: }
491:
492: #
493: # Convert an error return code from lcuseradd to a string value:
494: #
495: sub lcuseraddstrerror {
496: my $ErrorCode = shift;
497: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
498: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
499: } else {
500: return $adderrors[$ErrorCode];
501: }
502: }
503:
504: # grabs exception and records it to log before exiting
505: sub catchexception {
506: my ($error)=@_;
507: $SIG{'QUIT'}='DEFAULT';
508: $SIG{__DIE__}='DEFAULT';
509: &status("Catching exception");
510: &logthis("<font color=red>CRITICAL: "
511: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
512: ."a crash with this error msg->[$error]</font>");
513: &logthis('Famous last words: '.$status.' - '.$lastlog);
514: if ($client) { print $client "error: $error\n"; }
515: $server->close();
516: die($error);
517: }
518:
519: sub timeout {
520: &status("Handling Timeout");
521: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
522: &catchexception('Timeout');
523: }
524: # -------------------------------- Set signal handlers to record abnormal exits
525:
526: $SIG{'QUIT'}=\&catchexception;
527: $SIG{__DIE__}=\&catchexception;
528:
529: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
530: &status("Read loncapa.conf and loncapa_apache.conf");
531: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
532: %perlvar=%{$perlvarref};
533: undef $perlvarref;
534:
535: # ----------------------------- Make sure this process is running from user=www
536: my $wwwid=getpwnam('www');
537: if ($wwwid!=$<) {
538: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
539: my $subj="LON: $currenthostid User ID mismatch";
540: system("echo 'User ID mismatch. lond must be run as user www.' |\
541: mailto $emailto -s '$subj' > /dev/null");
542: exit 1;
543: }
544:
545: # --------------------------------------------- Check if other instance running
546:
547: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
548:
549: if (-e $pidfile) {
550: my $lfh=IO::File->new("$pidfile");
551: my $pide=<$lfh>;
552: chomp($pide);
553: if (kill 0 => $pide) { die "already running"; }
554: }
555:
556: # ------------------------------------------------------------- Read hosts file
557:
558:
559:
560: # establish SERVER socket, bind and listen.
561: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
562: Type => SOCK_STREAM,
563: Proto => 'tcp',
564: Reuse => 1,
565: Listen => 10 )
566: or die "making socket: $@\n";
567:
568: # --------------------------------------------------------- Do global variables
569:
570: # global variables
571:
572: my %children = (); # keys are current child process IDs
573: my $children = 0; # current number of children
574:
575: sub REAPER { # takes care of dead children
576: $SIG{CHLD} = \&REAPER;
577: &status("Handling child death");
578: my $pid = wait;
579: if (defined($children{$pid})) {
580: &logthis("Child $pid died");
581: $children --;
582: delete $children{$pid};
583: } else {
584: &logthis("Unknown Child $pid died");
585: }
586: &status("Finished Handling child death");
587: }
588:
589: sub HUNTSMAN { # signal handler for SIGINT
590: &status("Killing children (INT)");
591: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
592: kill 'INT' => keys %children;
593: &logthis("Free socket: ".shutdown($server,2)); # free up socket
594: my $execdir=$perlvar{'lonDaemons'};
595: unlink("$execdir/logs/lond.pid");
596: &logthis("<font color=red>CRITICAL: Shutting down</font>");
597: &status("Done killing children");
598: exit; # clean up with dignity
599: }
600:
601: sub HUPSMAN { # signal handler for SIGHUP
602: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
603: &status("Killing children for restart (HUP)");
604: kill 'INT' => keys %children;
605: &logthis("Free socket: ".shutdown($server,2)); # free up socket
606: &logthis("<font color=red>CRITICAL: Restarting</font>");
607: my $execdir=$perlvar{'lonDaemons'};
608: unlink("$execdir/logs/lond.pid");
609: &status("Restarting self (HUP)");
610: exec("$execdir/lond"); # here we go again
611: }
612:
613: #
614: # Kill off hashes that describe the host table prior to re-reading it.
615: # Hashes affected are:
616: # %hostid, %hostdom %hostip
617: #
618: sub KillHostHashes {
619: foreach my $key (keys %hostid) {
620: delete $hostid{$key};
621: }
622: foreach my $key (keys %hostdom) {
623: delete $hostdom{$key};
624: }
625: foreach my $key (keys %hostip) {
626: delete $hostip{$key};
627: }
628: }
629: #
630: # Read in the host table from file and distribute it into the various hashes:
631: #
632: # - %hostid - Indexed by IP, the loncapa hostname.
633: # - %hostdom - Indexed by loncapa hostname, the domain.
634: # - %hostip - Indexed by hostid, the Ip address of the host.
635: sub ReadHostTable {
636:
637: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
638:
639: while (my $configline=<CONFIG>) {
640: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
641: chomp($ip); $ip=~s/\D+$//;
642: $hostid{$ip}=$id;
643: $hostdom{$id}=$domain;
644: $hostip{$id}=$ip;
645: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
646: }
647: close(CONFIG);
648: }
649: #
650: # Reload the Apache daemon's state.
651: # This is done by invoking /home/httpd/perl/apachereload
652: # a setuid perl script that can be root for us to do this job.
653: #
654: sub ReloadApache {
655: my $execdir = $perlvar{'lonDaemons'};
656: my $script = $execdir."/apachereload";
657: system($script);
658: }
659:
660: #
661: # Called in response to a USR2 signal.
662: # - Reread hosts.tab
663: # - All children connected to hosts that were removed from hosts.tab
664: # are killed via SIGINT
665: # - All children connected to previously existing hosts are sent SIGUSR1
666: # - Our internal hosts hash is updated to reflect the new contents of
667: # hosts.tab causing connections from hosts added to hosts.tab to
668: # now be honored.
669: #
670: sub UpdateHosts {
671: &status("Reload hosts.tab");
672: logthis('<font color="blue"> Updating connections </font>');
673: #
674: # The %children hash has the set of IP's we currently have children
675: # on. These need to be matched against records in the hosts.tab
676: # Any ip's no longer in the table get killed off they correspond to
677: # either dropped or changed hosts. Note that the re-read of the table
678: # will take care of new and changed hosts as connections come into being.
679:
680:
681: KillHostHashes;
682: ReadHostTable;
683:
684: foreach my $child (keys %children) {
685: my $childip = $children{$child};
686: if(!$hostid{$childip}) {
687: logthis('<font color="blue"> UpdateHosts killing child '
688: ." $child for ip $childip </font>");
689: kill('INT', $child);
690: } else {
691: logthis('<font color="green"> keeping child for ip '
692: ." $childip (pid=$child) </font>");
693: }
694: }
695: ReloadApache;
696: &status("Finished reloading hosts.tab");
697: }
698:
699:
700: sub checkchildren {
701: &status("Checking on the children (sending signals)");
702: &initnewstatus();
703: &logstatus();
704: &logthis('Going to check on the children');
705: my $docdir=$perlvar{'lonDocRoot'};
706: foreach (sort keys %children) {
707: sleep 1;
708: unless (kill 'USR1' => $_) {
709: &logthis ('Child '.$_.' is dead');
710: &logstatus($$.' is dead');
711: }
712: }
713: sleep 5;
714: $SIG{ALRM} = sub { die "timeout" };
715: $SIG{__DIE__} = 'DEFAULT';
716: &status("Checking on the children (waiting for reports)");
717: foreach (sort keys %children) {
718: unless (-e "$docdir/lon-status/londchld/$_.txt") {
719: eval {
720: alarm(300);
721: &logthis('Child '.$_.' did not respond');
722: kill 9 => $_;
723: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
724: #$subj="LON: $currenthostid killed lond process $_";
725: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
726: #$execdir=$perlvar{'lonDaemons'};
727: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
728: alarm(0);
729: }
730: }
731: }
732: $SIG{ALRM} = 'DEFAULT';
733: $SIG{__DIE__} = \&catchexception;
734: &status("Finished checking children");
735: }
736:
737: # --------------------------------------------------------------------- Logging
738:
739: sub logthis {
740: my $message=shift;
741: my $execdir=$perlvar{'lonDaemons'};
742: my $fh=IO::File->new(">>$execdir/logs/lond.log");
743: my $now=time;
744: my $local=localtime($now);
745: $lastlog=$local.': '.$message;
746: print $fh "$local ($$): $message\n";
747: }
748:
749: # ------------------------- Conditional log if $DEBUG true.
750: sub Debug {
751: my $message = shift;
752: if($DEBUG) {
753: &logthis($message);
754: }
755: }
756:
757: #
758: # Sub to do replies to client.. this gives a hook for some
759: # debug tracing too:
760: # Parameters:
761: # fd - File open on client.
762: # reply - Text to send to client.
763: # request - Original request from client.
764: #
765: sub Reply {
766: my $fd = shift;
767: my $reply = shift;
768: my $request = shift;
769:
770: print $fd $reply;
771: Debug("Request was $request Reply was $reply");
772:
773: }
774: # ------------------------------------------------------------------ Log status
775:
776: sub logstatus {
777: &status("Doing logging");
778: my $docdir=$perlvar{'lonDocRoot'};
779: {
780: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
781: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
782: $fh->close();
783: }
784: &status("Finished londstatus.txt");
785: {
786: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
787: print $fh $status."\n".$lastlog."\n".time;
788: $fh->close();
789: }
790: &status("Finished logging");
791: }
792:
793: sub initnewstatus {
794: my $docdir=$perlvar{'lonDocRoot'};
795: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
796: my $now=time;
797: my $local=localtime($now);
798: print $fh "LOND status $local - parent $$\n\n";
799: opendir(DIR,"$docdir/lon-status/londchld");
800: while (my $filename=readdir(DIR)) {
801: unlink("$docdir/lon-status/londchld/$filename");
802: }
803: closedir(DIR);
804: }
805:
806: # -------------------------------------------------------------- Status setting
807:
808: sub status {
809: my $what=shift;
810: my $now=time;
811: my $local=localtime($now);
812: $status=$local.': '.$what;
813: $0='lond: '.$what.' '.$local;
814: }
815:
816: # -------------------------------------------------------- Escape Special Chars
817:
818: sub escape {
819: my $str=shift;
820: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
821: return $str;
822: }
823:
824: # ----------------------------------------------------- Un-Escape Special Chars
825:
826: sub unescape {
827: my $str=shift;
828: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
829: return $str;
830: }
831:
832: # ----------------------------------------------------------- Send USR1 to lonc
833:
834: sub reconlonc {
835: my $peerfile=shift;
836: &logthis("Trying to reconnect for $peerfile");
837: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
838: if (my $fh=IO::File->new("$loncfile")) {
839: my $loncpid=<$fh>;
840: chomp($loncpid);
841: if (kill 0 => $loncpid) {
842: &logthis("lonc at pid $loncpid responding, sending USR1");
843: kill USR1 => $loncpid;
844: } else {
845: &logthis(
846: "<font color=red>CRITICAL: "
847: ."lonc at pid $loncpid not responding, giving up</font>");
848: }
849: } else {
850: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
851: }
852: }
853:
854: # -------------------------------------------------- Non-critical communication
855:
856: sub subreply {
857: my ($cmd,$server)=@_;
858: my $peerfile="$perlvar{'lonSockDir'}/$server";
859: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
860: Type => SOCK_STREAM,
861: Timeout => 10)
862: or return "con_lost";
863: print $sclient "$cmd\n";
864: my $answer=<$sclient>;
865: chomp($answer);
866: if (!$answer) { $answer="con_lost"; }
867: return $answer;
868: }
869:
870: sub reply {
871: my ($cmd,$server)=@_;
872: my $answer;
873: if ($server ne $currenthostid) {
874: $answer=subreply($cmd,$server);
875: if ($answer eq 'con_lost') {
876: $answer=subreply("ping",$server);
877: if ($answer ne $server) {
878: &logthis("sub reply: answer != server answer is $answer, server is $server");
879: &reconlonc("$perlvar{'lonSockDir'}/$server");
880: }
881: $answer=subreply($cmd,$server);
882: }
883: } else {
884: $answer='self_reply';
885: }
886: return $answer;
887: }
888:
889: # -------------------------------------------------------------- Talk to lonsql
890:
891: sub sqlreply {
892: my ($cmd)=@_;
893: my $answer=subsqlreply($cmd);
894: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
895: return $answer;
896: }
897:
898: sub subsqlreply {
899: my ($cmd)=@_;
900: my $unixsock="mysqlsock";
901: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
902: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
903: Type => SOCK_STREAM,
904: Timeout => 10)
905: or return "con_lost";
906: print $sclient "$cmd\n";
907: my $answer=<$sclient>;
908: chomp($answer);
909: if (!$answer) { $answer="con_lost"; }
910: return $answer;
911: }
912:
913: # -------------------------------------------- Return path to profile directory
914:
915: sub propath {
916: my ($udom,$uname)=@_;
917: $udom=~s/\W//g;
918: $uname=~s/\W//g;
919: my $subdir=$uname.'__';
920: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
921: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
922: return $proname;
923: }
924:
925: # --------------------------------------- Is this the home server of an author?
926:
927: sub ishome {
928: my $author=shift;
929: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
930: my ($udom,$uname)=split(/\//,$author);
931: my $proname=propath($udom,$uname);
932: if (-e $proname) {
933: return 'owner';
934: } else {
935: return 'not_owner';
936: }
937: }
938:
939: # ======================================================= Continue main program
940: # ---------------------------------------------------- Fork once and dissociate
941:
942: my $fpid=fork;
943: exit if $fpid;
944: die "Couldn't fork: $!" unless defined ($fpid);
945:
946: POSIX::setsid() or die "Can't start new session: $!";
947:
948: # ------------------------------------------------------- Write our PID on disk
949:
950: my $execdir=$perlvar{'lonDaemons'};
951: open (PIDSAVE,">$execdir/logs/lond.pid");
952: print PIDSAVE "$$\n";
953: close(PIDSAVE);
954: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
955: &status('Starting');
956:
957:
958:
959: # ----------------------------------------------------- Install signal handlers
960:
961:
962: $SIG{CHLD} = \&REAPER;
963: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
964: $SIG{HUP} = \&HUPSMAN;
965: $SIG{USR1} = \&checkchildren;
966: $SIG{USR2} = \&UpdateHosts;
967:
968: # Read the host hashes:
969:
970: ReadHostTable;
971:
972: # --------------------------------------------------------------
973: # Accept connections. When a connection comes in, it is validated
974: # and if good, a child process is created to process transactions
975: # along the connection.
976:
977: while (1) {
978: &status('Starting accept');
979: $client = $server->accept() or next;
980: &status('Accepted '.$client.' off to spawn');
981: make_new_child($client);
982: &status('Finished spawning');
983: }
984:
985: sub make_new_child {
986: my $pid;
987: my $cipher;
988: my $sigset;
989:
990: $client = shift;
991: &status('Starting new child '.$client);
992: &logthis('<font color="green"> Attempting to start child ('.$client.
993: ")</font>");
994: # block signal for fork
995: $sigset = POSIX::SigSet->new(SIGINT);
996: sigprocmask(SIG_BLOCK, $sigset)
997: or die "Can't block SIGINT for fork: $!\n";
998:
999: die "fork: $!" unless defined ($pid = fork);
1000:
1001: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
1002: # connection liveness.
1003:
1004: #
1005: # Figure out who we're talking to so we can record the peer in
1006: # the pid hash.
1007: #
1008: my $caller = getpeername($client);
1009: my ($port,$iaddr)=unpack_sockaddr_in($caller);
1010: $clientip=inet_ntoa($iaddr);
1011:
1012: if ($pid) {
1013: # Parent records the child's birth and returns.
1014: sigprocmask(SIG_UNBLOCK, $sigset)
1015: or die "Can't unblock SIGINT for fork: $!\n";
1016: $children{$pid} = $clientip;
1017: $children++;
1018: &status('Started child '.$pid);
1019: return;
1020: } else {
1021: # Child can *not* return from this subroutine.
1022: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1023: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
1024: #don't get intercepted
1025: $SIG{USR1}= \&logstatus;
1026: $SIG{ALRM}= \&timeout;
1027: $lastlog='Forked ';
1028: $status='Forked';
1029:
1030: # unblock signals
1031: sigprocmask(SIG_UNBLOCK, $sigset)
1032: or die "Can't unblock SIGINT for fork: $!\n";
1033:
1034: my $tmpsnum=0;
1035: #---------------------------------------------------- kerberos 5 initialization
1036: &Authen::Krb5::init_context();
1037: &Authen::Krb5::init_ets();
1038:
1039: &status('Accepted connection');
1040: # =============================================================================
1041: # do something with the connection
1042: # -----------------------------------------------------------------------------
1043: # see if we know client and check for spoof IP by challenge
1044:
1045: ReadManagerTable; # May also be a manager!!
1046:
1047: my $clientrec=($hostid{$clientip} ne undef);
1048: my $ismanager=($managers{$clientip} ne undef);
1049: $clientname = "[unknonwn]";
1050: if($clientrec) { # Establish client type.
1051: $ConnectionType = "client";
1052: $clientname = $hostid{$clientip};
1053: if($ismanager) {
1054: $ConnectionType = "both";
1055: }
1056: } else {
1057: $ConnectionType = "manager";
1058: $clientname = $managers{$clientip};
1059: }
1060: my $clientok;
1061: if ($clientrec || $ismanager) {
1062: &status("Waiting for init from $clientip $clientname");
1063: &logthis('<font color="yellow">INFO: Connection, '.
1064: $clientip.
1065: " ($clientname) connection type = $ConnectionType </font>" );
1066: &status("Connecting $clientip ($clientname))");
1067: my $remotereq=<$client>;
1068: $remotereq=~s/[^\w:]//g;
1069: if ($remotereq =~ /^init/) {
1070: &sethost("sethost:$perlvar{'lonHostID'}");
1071: my $challenge="$$".time;
1072: print $client "$challenge\n";
1073: &status(
1074: "Waiting for challenge reply from $clientip ($clientname)");
1075: $remotereq=<$client>;
1076: $remotereq=~s/\W//g;
1077: if ($challenge eq $remotereq) {
1078: $clientok=1;
1079: print $client "ok\n";
1080: } else {
1081: &logthis(
1082: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
1083: &status('No challenge reply '.$clientip);
1084: }
1085: } else {
1086: &logthis(
1087: "<font color=blue>WARNING: "
1088: ."$clientip failed to initialize: >$remotereq< </font>");
1089: &status('No init '.$clientip);
1090: }
1091: } else {
1092: &logthis(
1093: "<font color=blue>WARNING: Unknown client $clientip</font>");
1094: &status('Hung up on '.$clientip);
1095: }
1096: if ($clientok) {
1097: # ---------------- New known client connecting, could mean machine online again
1098:
1099: foreach my $id (keys(%hostip)) {
1100: if ($hostip{$id} ne $clientip ||
1101: $hostip{$currenthostid} eq $clientip) {
1102: # no need to try to do recon's to myself
1103: next;
1104: }
1105: &reconlonc("$perlvar{'lonSockDir'}/$id");
1106: }
1107: &logthis("<font color=green>Established connection: $clientname</font>");
1108: &status('Will listen to '.$clientname);
1109: # ------------------------------------------------------------ Process requests
1110: while (my $userinput=<$client>) {
1111: chomp($userinput);
1112: Debug("Request = $userinput\n");
1113: &status('Processing '.$clientname.': '.$userinput);
1114: my $wasenc=0;
1115: alarm(120);
1116: # ------------------------------------------------------------ See if encrypted
1117: if ($userinput =~ /^enc/) {
1118: if ($cipher) {
1119: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
1120: $userinput='';
1121: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
1122: $userinput.=
1123: $cipher->decrypt(
1124: pack("H16",substr($encinput,$encidx,16))
1125: );
1126: }
1127: $userinput=substr($userinput,0,$cmdlength);
1128: $wasenc=1;
1129: }
1130: }
1131:
1132: # ------------------------------------------------------------- Normal commands
1133: # ------------------------------------------------------------------------ ping
1134: if ($userinput =~ /^ping/) { # client only
1135: if(isClient) {
1136: print $client "$currenthostid\n";
1137: } else {
1138: Reply($client, "refused\n", $userinput);
1139: }
1140: # ------------------------------------------------------------------------ pong
1141: }elsif ($userinput =~ /^pong/) { # client only
1142: if(isClient) {
1143: my $reply=&reply("ping",$clientname);
1144: print $client "$currenthostid:$reply\n";
1145: } else {
1146: Reply($client, "refused\n", $userinput);
1147: }
1148: # ------------------------------------------------------------------------ ekey
1149: } elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
1150: my $buildkey=time.$$.int(rand 100000);
1151: $buildkey=~tr/1-6/A-F/;
1152: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1153: my $key=$currenthostid.$clientname;
1154: $key=~tr/a-z/A-Z/;
1155: $key=~tr/G-P/0-9/;
1156: $key=~tr/Q-Z/0-9/;
1157: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1158: $key=substr($key,0,32);
1159: my $cipherkey=pack("H32",$key);
1160: $cipher=new IDEA $cipherkey;
1161: print $client "$buildkey\n";
1162: # ------------------------------------------------------------------------ load
1163: } elsif ($userinput =~ /^load/) { # client only
1164: if (isClient) {
1165: my $loadavg;
1166: {
1167: my $loadfile=IO::File->new('/proc/loadavg');
1168: $loadavg=<$loadfile>;
1169: }
1170: $loadavg =~ s/\s.*//g;
1171: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1172: print $client "$loadpercent\n";
1173: } else {
1174: Reply($client, "refused\n", $userinput);
1175:
1176: }
1177: # -------------------------------------------------------------------- userload
1178: } elsif ($userinput =~ /^userload/) { # client only
1179: if(isClient) {
1180: my $userloadpercent=&userload();
1181: print $client "$userloadpercent\n";
1182: } else {
1183: Reply($client, "refused\n", $userinput);
1184:
1185: }
1186: #
1187: # Transactions requiring encryption:
1188: #
1189: # ----------------------------------------------------------------- currentauth
1190: } elsif ($userinput =~ /^currentauth/) {
1191: if (($wasenc==1) && isClient) { # Encoded & client only.
1192: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1193: my $result = GetAuthType($udom, $uname);
1194: if($result eq "nouser") {
1195: print $client "unknown_user\n";
1196: }
1197: else {
1198: print $client "$result\n"
1199: }
1200: } else {
1201: Reply($client, "refused\n", $userinput);
1202:
1203: }
1204: #--------------------------------------------------------------------- pushfile
1205: } elsif($userinput =~ /^pushfile/) { # encoded & manager.
1206: if(($wasenc == 1) && isManager) {
1207: my $cert = GetCertificate($userinput);
1208: if(ValidManager($cert)) {
1209: my $reply = PushFile($userinput);
1210: print $client "$reply\n";
1211: } else {
1212: print $client "refused\n";
1213: }
1214: } else {
1215: Reply($client, "refused\n", $userinput);
1216:
1217: }
1218: #--------------------------------------------------------------------- reinit
1219: } elsif($userinput =~ /^reinit/) { # Encoded and manager
1220: if (($wasenc == 1) && isManager) {
1221: my $cert = GetCertificate($userinput);
1222: if(ValidManager($cert)) {
1223: chomp($userinput);
1224: my $reply = ReinitProcess($userinput);
1225: print $client "$reply\n";
1226: } else {
1227: print $client "refused\n";
1228: }
1229: } else {
1230: Reply($client, "refused\n", $userinput);
1231: }
1232: #------------------------------------------------------------------------- edit
1233: } elsif ($userinput =~ /^edit/) { # encoded and manager:
1234: if(($wasenc ==1) && (isManager)) {
1235: my $cert = GetCertificate($userinput);
1236: if(ValidManager($cert)) {
1237: my($command, $filetype, $script) = split(/:/, $userinput);
1238: if (($filetype eq "hosts") || ($filetype eq "domain")) {
1239: if($script ne "") {
1240: Reply($client,"ok\n",$userinput); # DEBUG: Call EditFile here.
1241: } else {
1242: Reply($client,"refused\n",$userinput);
1243: }
1244: } else {
1245: Reply($client,"refused\n",$userinput);
1246: }
1247: } else {
1248: Reply($client,"refused\n",$userinput);
1249: }
1250: } else {
1251: Reply($client,"refused\n",$userinput);
1252: }
1253: # ------------------------------------------------------------------------ auth
1254: } elsif ($userinput =~ /^auth/) { # Encoded and client only.
1255: if (($wasenc==1) && isClient) {
1256: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1257: chomp($upass);
1258: $upass=unescape($upass);
1259: my $proname=propath($udom,$uname);
1260: my $passfilename="$proname/passwd";
1261: if (-e $passfilename) {
1262: my $pf = IO::File->new($passfilename);
1263: my $realpasswd=<$pf>;
1264: chomp($realpasswd);
1265: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1266: my $pwdcorrect=0;
1267: if ($howpwd eq 'internal') {
1268: &Debug("Internal auth");
1269: $pwdcorrect=
1270: (crypt($upass,$contentpwd) eq $contentpwd);
1271: } elsif ($howpwd eq 'unix') {
1272: &Debug("Unix auth");
1273: if((getpwnam($uname))[1] eq "") { #no such user!
1274: $pwdcorrect = 0;
1275: } else {
1276: $contentpwd=(getpwnam($uname))[1];
1277: my $pwauth_path="/usr/local/sbin/pwauth";
1278: unless ($contentpwd eq 'x') {
1279: $pwdcorrect=
1280: (crypt($upass,$contentpwd) eq
1281: $contentpwd);
1282: }
1283:
1284: elsif (-e $pwauth_path) {
1285: open PWAUTH, "|$pwauth_path" or
1286: die "Cannot invoke authentication";
1287: print PWAUTH "$uname\n$upass\n";
1288: close PWAUTH;
1289: $pwdcorrect=!$?;
1290: }
1291: }
1292: } elsif ($howpwd eq 'krb4') {
1293: my $null=pack("C",0);
1294: unless ($upass=~/$null/) {
1295: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1296: ($uname,"",$contentpwd,'krbtgt',
1297: $contentpwd,1,$upass);
1298: if (!$krb4_error) {
1299: $pwdcorrect = 1;
1300: } else {
1301: $pwdcorrect=0;
1302: # log error if it is not a bad password
1303: if ($krb4_error != 62) {
1304: &logthis('krb4:'.$uname.','.$contentpwd.','.
1305: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1306: }
1307: }
1308: }
1309: } elsif ($howpwd eq 'krb5') {
1310: my $null=pack("C",0);
1311: unless ($upass=~/$null/) {
1312: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1313: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1314: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1315: my $credentials=&Authen::Krb5::cc_default();
1316: $credentials->initialize($krbclient);
1317: my $krbreturn =
1318: &Authen::Krb5::get_in_tkt_with_password(
1319: $krbclient,$krbserver,$upass,$credentials);
1320: # unless ($krbreturn) {
1321: # &logthis("Krb5 Error: ".
1322: # &Authen::Krb5::error());
1323: # }
1324: $pwdcorrect = ($krbreturn == 1);
1325: } else { $pwdcorrect=0; }
1326: } elsif ($howpwd eq 'localauth') {
1327: $pwdcorrect=&localauth::localauth($uname,$upass,
1328: $contentpwd);
1329: }
1330: if ($pwdcorrect) {
1331: print $client "authorized\n";
1332: } else {
1333: print $client "non_authorized\n";
1334: }
1335: } else {
1336: print $client "unknown_user\n";
1337: }
1338: } else {
1339: Reply($client, "refused\n", $userinput);
1340:
1341: }
1342: # ---------------------------------------------------------------------- passwd
1343: } elsif ($userinput =~ /^passwd/) { # encoded and client
1344: if (($wasenc==1) && isClient) {
1345: my
1346: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1347: chomp($npass);
1348: $upass=&unescape($upass);
1349: $npass=&unescape($npass);
1350: &Debug("Trying to change password for $uname");
1351: my $proname=propath($udom,$uname);
1352: my $passfilename="$proname/passwd";
1353: if (-e $passfilename) {
1354: my $realpasswd;
1355: { my $pf = IO::File->new($passfilename);
1356: $realpasswd=<$pf>; }
1357: chomp($realpasswd);
1358: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1359: if ($howpwd eq 'internal') {
1360: &Debug("internal auth");
1361: if (crypt($upass,$contentpwd) eq $contentpwd) {
1362: my $salt=time;
1363: $salt=substr($salt,6,2);
1364: my $ncpass=crypt($npass,$salt);
1365: {
1366: my $pf;
1367: if ($pf = IO::File->new(">$passfilename")) {
1368: print $pf "internal:$ncpass\n";
1369: &logthis("Result of password change for $uname: pwchange_success");
1370: print $client "ok\n";
1371: } else {
1372: &logthis("Unable to open $uname passwd to change password");
1373: print $client "non_authorized\n";
1374: }
1375: }
1376:
1377: } else {
1378: print $client "non_authorized\n";
1379: }
1380: } elsif ($howpwd eq 'unix') {
1381: # Unix means we have to access /etc/password
1382: # one way or another.
1383: # First: Make sure the current password is
1384: # correct
1385: &Debug("auth is unix");
1386: $contentpwd=(getpwnam($uname))[1];
1387: my $pwdcorrect = "0";
1388: my $pwauth_path="/usr/local/sbin/pwauth";
1389: unless ($contentpwd eq 'x') {
1390: $pwdcorrect=
1391: (crypt($upass,$contentpwd) eq $contentpwd);
1392: } elsif (-e $pwauth_path) {
1393: open PWAUTH, "|$pwauth_path" or
1394: die "Cannot invoke authentication";
1395: print PWAUTH "$uname\n$upass\n";
1396: close PWAUTH;
1397: &Debug("exited pwauth with $? ($uname,$upass) ");
1398: $pwdcorrect=($? == 0);
1399: }
1400: if ($pwdcorrect) {
1401: my $execdir=$perlvar{'lonDaemons'};
1402: &Debug("Opening lcpasswd pipeline");
1403: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1404: print $pf "$uname\n$npass\n$npass\n";
1405: close $pf;
1406: my $err = $?;
1407: my $result = ($err>0 ? 'pwchange_failure'
1408: : 'ok');
1409: &logthis("Result of password change for $uname: ".
1410: &lcpasswdstrerror($?));
1411: print $client "$result\n";
1412: } else {
1413: print $client "non_authorized\n";
1414: }
1415: } else {
1416: print $client "auth_mode_error\n";
1417: }
1418: } else {
1419: print $client "unknown_user\n";
1420: }
1421: } else {
1422: Reply($client, "refused\n", $userinput);
1423:
1424: }
1425: # -------------------------------------------------------------------- makeuser
1426: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1427: &Debug("Make user received");
1428: my $oldumask=umask(0077);
1429: if (($wasenc==1) && isClient) {
1430: my
1431: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1432: &Debug("cmd =".$cmd." $udom =".$udom.
1433: " uname=".$uname);
1434: chomp($npass);
1435: $npass=&unescape($npass);
1436: my $proname=propath($udom,$uname);
1437: my $passfilename="$proname/passwd";
1438: &Debug("Password file created will be:".
1439: $passfilename);
1440: if (-e $passfilename) {
1441: print $client "already_exists\n";
1442: } elsif ($udom ne $currentdomainid) {
1443: print $client "not_right_domain\n";
1444: } else {
1445: my @fpparts=split(/\//,$proname);
1446: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1447: my $fperror='';
1448: for (my $i=3;$i<=$#fpparts;$i++) {
1449: $fpnow.='/'.$fpparts[$i];
1450: unless (-e $fpnow) {
1451: unless (mkdir($fpnow,0777)) {
1452: $fperror="error: ".($!+0)
1453: ." mkdir failed while attempting "
1454: ."makeuser\n";
1455: }
1456: }
1457: }
1458: unless ($fperror) {
1459: my $result=&make_passwd_file($uname, $umode,$npass,
1460: $passfilename);
1461: print $client $result;
1462: } else {
1463: print $client "$fperror\n";
1464: }
1465: }
1466: } else {
1467: Reply($client, "refused\n", $userinput);
1468:
1469: }
1470: umask($oldumask);
1471: # -------------------------------------------------------------- changeuserauth
1472: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1473: &Debug("Changing authorization");
1474: if (($wasenc==1) && isClient) {
1475: my
1476: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1477: chomp($npass);
1478: &Debug("cmd = ".$cmd." domain= ".$udom.
1479: "uname =".$uname." umode= ".$umode);
1480: $npass=&unescape($npass);
1481: my $proname=&propath($udom,$uname);
1482: my $passfilename="$proname/passwd";
1483: if ($udom ne $currentdomainid) {
1484: print $client "not_right_domain\n";
1485: } else {
1486: my $result=&make_passwd_file($uname, $umode,$npass,
1487: $passfilename);
1488: print $client $result;
1489: }
1490: } else {
1491: Reply($client, "refused\n", $userinput);
1492:
1493: }
1494: # ------------------------------------------------------------------------ home
1495: } elsif ($userinput =~ /^home/) { # client clear or encoded
1496: if(isClient) {
1497: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1498: chomp($uname);
1499: my $proname=propath($udom,$uname);
1500: if (-e $proname) {
1501: print $client "found\n";
1502: } else {
1503: print $client "not_found\n";
1504: }
1505: } else {
1506: Reply($client, "refused\n", $userinput);
1507:
1508: }
1509: # ---------------------------------------------------------------------- update
1510: } elsif ($userinput =~ /^update/) { # client clear or encoded.
1511: if(isClient) {
1512: my ($cmd,$fname)=split(/:/,$userinput);
1513: my $ownership=ishome($fname);
1514: if ($ownership eq 'not_owner') {
1515: if (-e $fname) {
1516: my ($dev,$ino,$mode,$nlink,
1517: $uid,$gid,$rdev,$size,
1518: $atime,$mtime,$ctime,
1519: $blksize,$blocks)=stat($fname);
1520: my $now=time;
1521: my $since=$now-$atime;
1522: if ($since>$perlvar{'lonExpire'}) {
1523: my $reply=
1524: &reply("unsub:$fname","$clientname");
1525: unlink("$fname");
1526: } else {
1527: my $transname="$fname.in.transfer";
1528: my $remoteurl=
1529: &reply("sub:$fname","$clientname");
1530: my $response;
1531: {
1532: my $ua=new LWP::UserAgent;
1533: my $request=new HTTP::Request('GET',"$remoteurl");
1534: $response=$ua->request($request,$transname);
1535: }
1536: if ($response->is_error()) {
1537: unlink($transname);
1538: my $message=$response->status_line;
1539: &logthis(
1540: "LWP GET: $message for $fname ($remoteurl)");
1541: } else {
1542: if ($remoteurl!~/\.meta$/) {
1543: my $ua=new LWP::UserAgent;
1544: my $mrequest=
1545: new HTTP::Request('GET',$remoteurl.'.meta');
1546: my $mresponse=
1547: $ua->request($mrequest,$fname.'.meta');
1548: if ($mresponse->is_error()) {
1549: unlink($fname.'.meta');
1550: }
1551: }
1552: rename($transname,$fname);
1553: }
1554: }
1555: print $client "ok\n";
1556: } else {
1557: print $client "not_found\n";
1558: }
1559: } else {
1560: print $client "rejected\n";
1561: }
1562: } else {
1563: Reply($client, "refused\n", $userinput);
1564:
1565: }
1566: # -------------------------------------- fetch a user file from a remote server
1567: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
1568: if(isClient) {
1569: my ($cmd,$fname)=split(/:/,$userinput);
1570: my ($udom,$uname,$ufile)=split(/\//,$fname);
1571: my $udir=propath($udom,$uname).'/userfiles';
1572: unless (-e $udir) { mkdir($udir,0770); }
1573: if (-e $udir) {
1574: $ufile=~s/^[\.\~]+//;
1575: $ufile=~s/\///g;
1576: my $destname=$udir.'/'.$ufile;
1577: my $transname=$udir.'/'.$ufile.'.in.transit';
1578: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1579: my $response;
1580: {
1581: my $ua=new LWP::UserAgent;
1582: my $request=new HTTP::Request('GET',"$remoteurl");
1583: $response=$ua->request($request,$transname);
1584: }
1585: if ($response->is_error()) {
1586: unlink($transname);
1587: my $message=$response->status_line;
1588: &logthis("LWP GET: $message for $fname ($remoteurl)");
1589: print $client "failed\n";
1590: } else {
1591: if (!rename($transname,$destname)) {
1592: &logthis("Unable to move $transname to $destname");
1593: unlink($transname);
1594: print $client "failed\n";
1595: } else {
1596: print $client "ok\n";
1597: }
1598: }
1599: } else {
1600: print $client "not_home\n";
1601: }
1602: } else {
1603: Reply($client, "refused\n", $userinput);
1604:
1605: }
1606: # ------------------------------------------ authenticate access to a user file
1607: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1608: if(isClient) {
1609: my ($cmd,$fname,$session)=split(/:/,$userinput);
1610: chomp($session);
1611: my $reply='non_auth';
1612: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1613: $session.'.id')) {
1614: while (my $line=<ENVIN>) {
1615: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1616: }
1617: close(ENVIN);
1618: print $client $reply."\n";
1619: } else {
1620: print $client "invalid_token\n";
1621: }
1622: } else {
1623: Reply($client, "refused\n", $userinput);
1624:
1625: }
1626: # ----------------------------------------------------------------- unsubscribe
1627: } elsif ($userinput =~ /^unsub/) {
1628: if(isClient) {
1629: my ($cmd,$fname)=split(/:/,$userinput);
1630: if (-e $fname) {
1631: print $client &unsub($client,$fname,$clientip);
1632: } else {
1633: print $client "not_found\n";
1634: }
1635: } else {
1636: Reply($client, "refused\n", $userinput);
1637:
1638: }
1639: # ------------------------------------------------------------------- subscribe
1640: } elsif ($userinput =~ /^sub/) {
1641: if(isClient) {
1642: print $client &subscribe($userinput,$clientip);
1643: } else {
1644: Reply($client, "refused\n", $userinput);
1645:
1646: }
1647: # ------------------------------------------------------------- current version
1648: } elsif ($userinput =~ /^currentversion/) {
1649: if(isClient) {
1650: my ($cmd,$fname)=split(/:/,$userinput);
1651: print $client ¤tversion($fname)."\n";
1652: } else {
1653: Reply($client, "refused\n", $userinput);
1654:
1655: }
1656: # ------------------------------------------------------------------------- log
1657: } elsif ($userinput =~ /^log/) {
1658: if(isClient) {
1659: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1660: chomp($what);
1661: my $proname=propath($udom,$uname);
1662: my $now=time;
1663: {
1664: my $hfh;
1665: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1666: print $hfh "$now:$clientname:$what\n";
1667: print $client "ok\n";
1668: } else {
1669: print $client "error: ".($!+0)
1670: ." IO::File->new Failed "
1671: ."while attempting log\n";
1672: }
1673: }
1674: } else {
1675: Reply($client, "refused\n", $userinput);
1676:
1677: }
1678: # ------------------------------------------------------------------------- put
1679: } elsif ($userinput =~ /^put/) {
1680: if(isClient) {
1681: my ($cmd,$udom,$uname,$namespace,$what)
1682: =split(/:/,$userinput);
1683: $namespace=~s/\//\_/g;
1684: $namespace=~s/\W//g;
1685: if ($namespace ne 'roles') {
1686: chomp($what);
1687: my $proname=propath($udom,$uname);
1688: my $now=time;
1689: unless ($namespace=~/^nohist\_/) {
1690: my $hfh;
1691: if (
1692: $hfh=IO::File->new(">>$proname/$namespace.hist")
1693: ) { print $hfh "P:$now:$what\n"; }
1694: }
1695: my @pairs=split(/\&/,$what);
1696: my %hash;
1697: if (tie(%hash,'GDBM_File',
1698: "$proname/$namespace.db",
1699: &GDBM_WRCREAT(),0640)) {
1700: foreach my $pair (@pairs) {
1701: my ($key,$value)=split(/=/,$pair);
1702: $hash{$key}=$value;
1703: }
1704: if (untie(%hash)) {
1705: print $client "ok\n";
1706: } else {
1707: print $client "error: ".($!+0)
1708: ." untie(GDBM) failed ".
1709: "while attempting put\n";
1710: }
1711: } else {
1712: print $client "error: ".($!)
1713: ." tie(GDBM) Failed ".
1714: "while attempting put\n";
1715: }
1716: } else {
1717: print $client "refused\n";
1718: }
1719: } else {
1720: Reply($client, "refused\n", $userinput);
1721:
1722: }
1723: # ------------------------------------------------------------------- inc
1724: } elsif ($userinput =~ /^inc:/) {
1725: if(isClient) {
1726: my ($cmd,$udom,$uname,$namespace,$what)
1727: =split(/:/,$userinput);
1728: $namespace=~s/\//\_/g;
1729: $namespace=~s/\W//g;
1730: if ($namespace ne 'roles') {
1731: chomp($what);
1732: my $proname=propath($udom,$uname);
1733: my $now=time;
1734: unless ($namespace=~/^nohist\_/) {
1735: my $hfh;
1736: if (
1737: $hfh=IO::File->new(">>$proname/$namespace.hist")
1738: ) { print $hfh "P:$now:$what\n"; }
1739: }
1740: my @pairs=split(/\&/,$what);
1741: my %hash;
1742: if (tie(%hash,'GDBM_File',
1743: "$proname/$namespace.db",
1744: &GDBM_WRCREAT(),0640)) {
1745: foreach my $pair (@pairs) {
1746: my ($key,$value)=split(/=/,$pair);
1747: # We could check that we have a number...
1748: if (! defined($value) || $value eq '') {
1749: $value = 1;
1750: }
1751: $hash{$key}+=$value;
1752: }
1753: if (untie(%hash)) {
1754: print $client "ok\n";
1755: } else {
1756: print $client "error: ".($!+0)
1757: ." untie(GDBM) failed ".
1758: "while attempting put\n";
1759: }
1760: } else {
1761: print $client "error: ".($!)
1762: ." tie(GDBM) Failed ".
1763: "while attempting put\n";
1764: }
1765: } else {
1766: print $client "refused\n";
1767: }
1768: } else {
1769: Reply($client, "refused\n", $userinput);
1770:
1771: }
1772: # -------------------------------------------------------------------- rolesput
1773: } elsif ($userinput =~ /^rolesput/) {
1774: if(isClient) {
1775: &Debug("rolesput");
1776: if ($wasenc==1) {
1777: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1778: =split(/:/,$userinput);
1779: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1780: "user = ".$exeuser." udom=".$udom.
1781: "what = ".$what);
1782: my $namespace='roles';
1783: chomp($what);
1784: my $proname=propath($udom,$uname);
1785: my $now=time;
1786: {
1787: my $hfh;
1788: if (
1789: $hfh=IO::File->new(">>$proname/$namespace.hist")
1790: ) {
1791: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1792: }
1793: }
1794: my @pairs=split(/\&/,$what);
1795: my %hash;
1796: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1797: foreach my $pair (@pairs) {
1798: my ($key,$value)=split(/=/,$pair);
1799: &ManagePermissions($key, $udom, $uname,
1800: &GetAuthType( $udom,
1801: $uname));
1802: $hash{$key}=$value;
1803: }
1804: if (untie(%hash)) {
1805: print $client "ok\n";
1806: } else {
1807: print $client "error: ".($!+0)
1808: ." untie(GDBM) Failed ".
1809: "while attempting rolesput\n";
1810: }
1811: } else {
1812: print $client "error: ".($!+0)
1813: ." tie(GDBM) Failed ".
1814: "while attempting rolesput\n";
1815: }
1816: } else {
1817: print $client "refused\n";
1818: }
1819: } else {
1820: Reply($client, "refused\n", $userinput);
1821:
1822: }
1823: # -------------------------------------------------------------------- rolesdel
1824: } elsif ($userinput =~ /^rolesdel/) {
1825: if(isClient) {
1826: &Debug("rolesdel");
1827: if ($wasenc==1) {
1828: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1829: =split(/:/,$userinput);
1830: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1831: "user = ".$exeuser." udom=".$udom.
1832: "what = ".$what);
1833: my $namespace='roles';
1834: chomp($what);
1835: my $proname=propath($udom,$uname);
1836: my $now=time;
1837: {
1838: my $hfh;
1839: if (
1840: $hfh=IO::File->new(">>$proname/$namespace.hist")
1841: ) {
1842: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1843: }
1844: }
1845: my @rolekeys=split(/\&/,$what);
1846: my %hash;
1847: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1848: foreach my $key (@rolekeys) {
1849: delete $hash{$key};
1850: }
1851: if (untie(%hash)) {
1852: print $client "ok\n";
1853: } else {
1854: print $client "error: ".($!+0)
1855: ." untie(GDBM) Failed ".
1856: "while attempting rolesdel\n";
1857: }
1858: } else {
1859: print $client "error: ".($!+0)
1860: ." tie(GDBM) Failed ".
1861: "while attempting rolesdel\n";
1862: }
1863: } else {
1864: print $client "refused\n";
1865: }
1866: } else {
1867: Reply($client, "refused\n", $userinput);
1868:
1869: }
1870: # ------------------------------------------------------------------------- get
1871: } elsif ($userinput =~ /^get/) {
1872: if(isClient) {
1873: my ($cmd,$udom,$uname,$namespace,$what)
1874: =split(/:/,$userinput);
1875: $namespace=~s/\//\_/g;
1876: $namespace=~s/\W//g;
1877: chomp($what);
1878: my @queries=split(/\&/,$what);
1879: my $proname=propath($udom,$uname);
1880: my $qresult='';
1881: my %hash;
1882: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1883: for (my $i=0;$i<=$#queries;$i++) {
1884: $qresult.="$hash{$queries[$i]}&";
1885: }
1886: if (untie(%hash)) {
1887: $qresult=~s/\&$//;
1888: print $client "$qresult\n";
1889: } else {
1890: print $client "error: ".($!+0)
1891: ." untie(GDBM) Failed ".
1892: "while attempting get\n";
1893: }
1894: } else {
1895: if ($!+0 == 2) {
1896: print $client "error:No such file or ".
1897: "GDBM reported bad block error\n";
1898: } else {
1899: print $client "error: ".($!+0)
1900: ." tie(GDBM) Failed ".
1901: "while attempting get\n";
1902: }
1903: }
1904: } else {
1905: Reply($client, "refused\n", $userinput);
1906:
1907: }
1908: # ------------------------------------------------------------------------ eget
1909: } elsif ($userinput =~ /^eget/) {
1910: if (isClient) {
1911: my ($cmd,$udom,$uname,$namespace,$what)
1912: =split(/:/,$userinput);
1913: $namespace=~s/\//\_/g;
1914: $namespace=~s/\W//g;
1915: chomp($what);
1916: my @queries=split(/\&/,$what);
1917: my $proname=propath($udom,$uname);
1918: my $qresult='';
1919: my %hash;
1920: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1921: for (my $i=0;$i<=$#queries;$i++) {
1922: $qresult.="$hash{$queries[$i]}&";
1923: }
1924: if (untie(%hash)) {
1925: $qresult=~s/\&$//;
1926: if ($cipher) {
1927: my $cmdlength=length($qresult);
1928: $qresult.=" ";
1929: my $encqresult='';
1930: for
1931: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1932: $encqresult.=
1933: unpack("H16",
1934: $cipher->encrypt(substr($qresult,$encidx,8)));
1935: }
1936: print $client "enc:$cmdlength:$encqresult\n";
1937: } else {
1938: print $client "error:no_key\n";
1939: }
1940: } else {
1941: print $client "error: ".($!+0)
1942: ." untie(GDBM) Failed ".
1943: "while attempting eget\n";
1944: }
1945: } else {
1946: print $client "error: ".($!+0)
1947: ." tie(GDBM) Failed ".
1948: "while attempting eget\n";
1949: }
1950: } else {
1951: Reply($client, "refused\n", $userinput);
1952:
1953: }
1954: # ------------------------------------------------------------------------- del
1955: } elsif ($userinput =~ /^del/) {
1956: if(isClient) {
1957: my ($cmd,$udom,$uname,$namespace,$what)
1958: =split(/:/,$userinput);
1959: $namespace=~s/\//\_/g;
1960: $namespace=~s/\W//g;
1961: chomp($what);
1962: my $proname=propath($udom,$uname);
1963: my $now=time;
1964: unless ($namespace=~/^nohist\_/) {
1965: my $hfh;
1966: if (
1967: $hfh=IO::File->new(">>$proname/$namespace.hist")
1968: ) { print $hfh "D:$now:$what\n"; }
1969: }
1970: my @keys=split(/\&/,$what);
1971: my %hash;
1972: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1973: foreach my $key (@keys) {
1974: delete($hash{$key});
1975: }
1976: if (untie(%hash)) {
1977: print $client "ok\n";
1978: } else {
1979: print $client "error: ".($!+0)
1980: ." untie(GDBM) Failed ".
1981: "while attempting del\n";
1982: }
1983: } else {
1984: print $client "error: ".($!+0)
1985: ." tie(GDBM) Failed ".
1986: "while attempting del\n";
1987: }
1988: } else {
1989: Reply($client, "refused\n", $userinput);
1990:
1991: }
1992: # ------------------------------------------------------------------------ keys
1993: } elsif ($userinput =~ /^keys/) {
1994: if(isClient) {
1995: my ($cmd,$udom,$uname,$namespace)
1996: =split(/:/,$userinput);
1997: $namespace=~s/\//\_/g;
1998: $namespace=~s/\W//g;
1999: my $proname=propath($udom,$uname);
2000: my $qresult='';
2001: my %hash;
2002: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2003: foreach my $key (keys %hash) {
2004: $qresult.="$key&";
2005: }
2006: if (untie(%hash)) {
2007: $qresult=~s/\&$//;
2008: print $client "$qresult\n";
2009: } else {
2010: print $client "error: ".($!+0)
2011: ." untie(GDBM) Failed ".
2012: "while attempting keys\n";
2013: }
2014: } else {
2015: print $client "error: ".($!+0)
2016: ." tie(GDBM) Failed ".
2017: "while attempting keys\n";
2018: }
2019: } else {
2020: Reply($client, "refused\n", $userinput);
2021:
2022: }
2023: # ----------------------------------------------------------------- dumpcurrent
2024: } elsif ($userinput =~ /^currentdump/) {
2025: if (isClient) {
2026: my ($cmd,$udom,$uname,$namespace)
2027: =split(/:/,$userinput);
2028: $namespace=~s/\//\_/g;
2029: $namespace=~s/\W//g;
2030: my $qresult='';
2031: my $proname=propath($udom,$uname);
2032: my %hash;
2033: if (tie(%hash,'GDBM_File',
2034: "$proname/$namespace.db",
2035: &GDBM_READER(),0640)) {
2036: # Structure of %data:
2037: # $data{$symb}->{$parameter}=$value;
2038: # $data{$symb}->{'v.'.$parameter}=$version;
2039: # since $parameter will be unescaped, we do not
2040: # have to worry about silly parameter names...
2041: my %data = ();
2042: while (my ($key,$value) = each(%hash)) {
2043: my ($v,$symb,$param) = split(/:/,$key);
2044: next if ($v eq 'version' || $symb eq 'keys');
2045: next if (exists($data{$symb}) &&
2046: exists($data{$symb}->{$param}) &&
2047: $data{$symb}->{'v.'.$param} > $v);
2048: $data{$symb}->{$param}=$value;
2049: $data{$symb}->{'v.'.$param}=$v;
2050: }
2051: if (untie(%hash)) {
2052: while (my ($symb,$param_hash) = each(%data)) {
2053: while(my ($param,$value) = each (%$param_hash)){
2054: next if ($param =~ /^v\./);
2055: $qresult.=$symb.':'.$param.'='.$value.'&';
2056: }
2057: }
2058: chop($qresult);
2059: print $client "$qresult\n";
2060: } else {
2061: print $client "error: ".($!+0)
2062: ." untie(GDBM) Failed ".
2063: "while attempting currentdump\n";
2064: }
2065: } else {
2066: print $client "error: ".($!+0)
2067: ." tie(GDBM) Failed ".
2068: "while attempting currentdump\n";
2069: }
2070: } else {
2071: Reply($client, "refused\n", $userinput);
2072: }
2073: # ------------------------------------------------------------------------ dump
2074: } elsif ($userinput =~ /^dump/) {
2075: if(isClient) {
2076: my ($cmd,$udom,$uname,$namespace,$regexp)
2077: =split(/:/,$userinput);
2078: $namespace=~s/\//\_/g;
2079: $namespace=~s/\W//g;
2080: if (defined($regexp)) {
2081: $regexp=&unescape($regexp);
2082: } else {
2083: $regexp='.';
2084: }
2085: my $qresult='';
2086: my $proname=propath($udom,$uname);
2087: my %hash;
2088: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2089: study($regexp);
2090: while (my ($key,$value) = each(%hash)) {
2091: if ($regexp eq '.') {
2092: $qresult.=$key.'='.$value.'&';
2093: } else {
2094: my $unescapeKey = &unescape($key);
2095: if (eval('$unescapeKey=~/$regexp/')) {
2096: $qresult.="$key=$value&";
2097: }
2098: }
2099: }
2100: if (untie(%hash)) {
2101: chop($qresult);
2102: print $client "$qresult\n";
2103: } else {
2104: print $client "error: ".($!+0)
2105: ." untie(GDBM) Failed ".
2106: "while attempting dump\n";
2107: }
2108: } else {
2109: print $client "error: ".($!+0)
2110: ." tie(GDBM) Failed ".
2111: "while attempting dump\n";
2112: }
2113: } else {
2114: Reply($client, "refused\n", $userinput);
2115:
2116: }
2117: # ----------------------------------------------------------------------- store
2118: } elsif ($userinput =~ /^store/) {
2119: if(isClient) {
2120: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2121: =split(/:/,$userinput);
2122: $namespace=~s/\//\_/g;
2123: $namespace=~s/\W//g;
2124: if ($namespace ne 'roles') {
2125: chomp($what);
2126: my $proname=propath($udom,$uname);
2127: my $now=time;
2128: unless ($namespace=~/^nohist\_/) {
2129: my $hfh;
2130: if (
2131: $hfh=IO::File->new(">>$proname/$namespace.hist")
2132: ) { print $hfh "P:$now:$rid:$what\n"; }
2133: }
2134: my @pairs=split(/\&/,$what);
2135: my %hash;
2136: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2137: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2138: my $key;
2139: $hash{"version:$rid"}++;
2140: my $version=$hash{"version:$rid"};
2141: my $allkeys='';
2142: foreach my $pair (@pairs) {
2143: my ($key,$value)=split(/=/,$pair);
2144: $allkeys.=$key.':';
2145: $hash{"$version:$rid:$key"}=$value;
2146: }
2147: $hash{"$version:$rid:timestamp"}=$now;
2148: $allkeys.='timestamp';
2149: $hash{"$version:keys:$rid"}=$allkeys;
2150: if (untie(%hash)) {
2151: print $client "ok\n";
2152: } else {
2153: print $client "error: ".($!+0)
2154: ." untie(GDBM) Failed ".
2155: "while attempting store\n";
2156: }
2157: } else {
2158: print $client "error: ".($!+0)
2159: ." tie(GDBM) Failed ".
2160: "while attempting store\n";
2161: }
2162: } else {
2163: print $client "refused\n";
2164: }
2165: } else {
2166: Reply($client, "refused\n", $userinput);
2167:
2168: }
2169: # --------------------------------------------------------------------- restore
2170: } elsif ($userinput =~ /^restore/) {
2171: if(isClient) {
2172: my ($cmd,$udom,$uname,$namespace,$rid)
2173: =split(/:/,$userinput);
2174: $namespace=~s/\//\_/g;
2175: $namespace=~s/\W//g;
2176: chomp($rid);
2177: my $proname=propath($udom,$uname);
2178: my $qresult='';
2179: my %hash;
2180: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2181: my $version=$hash{"version:$rid"};
2182: $qresult.="version=$version&";
2183: my $scope;
2184: for ($scope=1;$scope<=$version;$scope++) {
2185: my $vkeys=$hash{"$scope:keys:$rid"};
2186: my @keys=split(/:/,$vkeys);
2187: my $key;
2188: $qresult.="$scope:keys=$vkeys&";
2189: foreach $key (@keys) {
2190: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2191: }
2192: }
2193: if (untie(%hash)) {
2194: $qresult=~s/\&$//;
2195: print $client "$qresult\n";
2196: } else {
2197: print $client "error: ".($!+0)
2198: ." untie(GDBM) Failed ".
2199: "while attempting restore\n";
2200: }
2201: } else {
2202: print $client "error: ".($!+0)
2203: ." tie(GDBM) Failed ".
2204: "while attempting restore\n";
2205: }
2206: } else {
2207: Reply($client, "refused\n", $userinput);
2208:
2209: }
2210: # -------------------------------------------------------------------- chatsend
2211: } elsif ($userinput =~ /^chatsend/) {
2212: if(isClient) {
2213: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2214: &chatadd($cdom,$cnum,$newpost);
2215: print $client "ok\n";
2216: } else {
2217: Reply($client, "refused\n", $userinput);
2218:
2219: }
2220: # -------------------------------------------------------------------- chatretr
2221: } elsif ($userinput =~ /^chatretr/) {
2222: if(isClient) {
2223: my
2224: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2225: my $reply='';
2226: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2227: $reply.=&escape($_).':';
2228: }
2229: $reply=~s/\:$//;
2230: print $client $reply."\n";
2231: } else {
2232: Reply($client, "refused\n", $userinput);
2233:
2234: }
2235: # ------------------------------------------------------------------- querysend
2236: } elsif ($userinput =~ /^querysend/) {
2237: if(isClient) {
2238: my ($cmd,$query,
2239: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2240: $query=~s/\n*$//g;
2241: print $client "".
2242: sqlreply("$clientname\&$query".
2243: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2244: } else {
2245: Reply($client, "refused\n", $userinput);
2246:
2247: }
2248: # ------------------------------------------------------------------ queryreply
2249: } elsif ($userinput =~ /^queryreply/) {
2250: if(isClient) {
2251: my ($cmd,$id,$reply)=split(/:/,$userinput);
2252: my $store;
2253: my $execdir=$perlvar{'lonDaemons'};
2254: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2255: $reply=~s/\&/\n/g;
2256: print $store $reply;
2257: close $store;
2258: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2259: print $store2 "done\n";
2260: close $store2;
2261: print $client "ok\n";
2262: }
2263: else {
2264: print $client "error: ".($!+0)
2265: ." IO::File->new Failed ".
2266: "while attempting queryreply\n";
2267: }
2268: } else {
2269: Reply($client, "refused\n", $userinput);
2270:
2271: }
2272: # ----------------------------------------------------------------- courseidput
2273: } elsif ($userinput =~ /^courseidput/) {
2274: if(isClient) {
2275: my ($cmd,$udom,$what)=split(/:/,$userinput);
2276: chomp($what);
2277: $udom=~s/\W//g;
2278: my $proname=
2279: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2280: my $now=time;
2281: my @pairs=split(/\&/,$what);
2282: my %hash;
2283: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2284: foreach my $pair (@pairs) {
2285: my ($key,$value)=split(/=/,$pair);
2286: $hash{$key}=$value.':'.$now;
2287: }
2288: if (untie(%hash)) {
2289: print $client "ok\n";
2290: } else {
2291: print $client "error: ".($!+0)
2292: ." untie(GDBM) Failed ".
2293: "while attempting courseidput\n";
2294: }
2295: } else {
2296: print $client "error: ".($!+0)
2297: ." tie(GDBM) Failed ".
2298: "while attempting courseidput\n";
2299: }
2300: } else {
2301: Reply($client, "refused\n", $userinput);
2302:
2303: }
2304: # ---------------------------------------------------------------- courseiddump
2305: } elsif ($userinput =~ /^courseiddump/) {
2306: if(isClient) {
2307: my ($cmd,$udom,$since,$description)
2308: =split(/:/,$userinput);
2309: if (defined($description)) {
2310: $description=&unescape($description);
2311: } else {
2312: $description='.';
2313: }
2314: unless (defined($since)) { $since=0; }
2315: my $qresult='';
2316: my $proname=
2317: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2318: my %hash;
2319: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2320: while (my ($key,$value) = each(%hash)) {
2321: my ($descr,$lasttime)=split(/\:/,$value);
2322: if ($lasttime<$since) { next; }
2323: if ($description eq '.') {
2324: $qresult.=$key.'='.$descr.'&';
2325: } else {
2326: my $unescapeVal = &unescape($descr);
2327: if (eval('$unescapeVal=~/$description/i')) {
2328: $qresult.="$key=$descr&";
2329: }
2330: }
2331: }
2332: if (untie(%hash)) {
2333: chop($qresult);
2334: print $client "$qresult\n";
2335: } else {
2336: print $client "error: ".($!+0)
2337: ." untie(GDBM) Failed ".
2338: "while attempting courseiddump\n";
2339: }
2340: } else {
2341: print $client "error: ".($!+0)
2342: ." tie(GDBM) Failed ".
2343: "while attempting courseiddump\n";
2344: }
2345: } else {
2346: Reply($client, "refused\n", $userinput);
2347:
2348: }
2349: # ----------------------------------------------------------------------- idput
2350: } elsif ($userinput =~ /^idput/) {
2351: if(isClient) {
2352: my ($cmd,$udom,$what)=split(/:/,$userinput);
2353: chomp($what);
2354: $udom=~s/\W//g;
2355: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2356: my $now=time;
2357: {
2358: my $hfh;
2359: if (
2360: $hfh=IO::File->new(">>$proname.hist")
2361: ) { print $hfh "P:$now:$what\n"; }
2362: }
2363: my @pairs=split(/\&/,$what);
2364: my %hash;
2365: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2366: foreach my $pair (@pairs) {
2367: my ($key,$value)=split(/=/,$pair);
2368: $hash{$key}=$value;
2369: }
2370: if (untie(%hash)) {
2371: print $client "ok\n";
2372: } else {
2373: print $client "error: ".($!+0)
2374: ." untie(GDBM) Failed ".
2375: "while attempting idput\n";
2376: }
2377: } else {
2378: print $client "error: ".($!+0)
2379: ." tie(GDBM) Failed ".
2380: "while attempting idput\n";
2381: }
2382: } else {
2383: Reply($client, "refused\n", $userinput);
2384:
2385: }
2386: # ----------------------------------------------------------------------- idget
2387: } elsif ($userinput =~ /^idget/) {
2388: if(isClient) {
2389: my ($cmd,$udom,$what)=split(/:/,$userinput);
2390: chomp($what);
2391: $udom=~s/\W//g;
2392: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2393: my @queries=split(/\&/,$what);
2394: my $qresult='';
2395: my %hash;
2396: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2397: for (my $i=0;$i<=$#queries;$i++) {
2398: $qresult.="$hash{$queries[$i]}&";
2399: }
2400: if (untie(%hash)) {
2401: $qresult=~s/\&$//;
2402: print $client "$qresult\n";
2403: } else {
2404: print $client "error: ".($!+0)
2405: ." untie(GDBM) Failed ".
2406: "while attempting idget\n";
2407: }
2408: } else {
2409: print $client "error: ".($!+0)
2410: ." tie(GDBM) Failed ".
2411: "while attempting idget\n";
2412: }
2413: } else {
2414: Reply($client, "refused\n", $userinput);
2415:
2416: }
2417: # ---------------------------------------------------------------------- tmpput
2418: } elsif ($userinput =~ /^tmpput/) {
2419: if(isClient) {
2420: my ($cmd,$what)=split(/:/,$userinput);
2421: my $store;
2422: $tmpsnum++;
2423: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2424: $id=~s/\W/\_/g;
2425: $what=~s/\n//g;
2426: my $execdir=$perlvar{'lonDaemons'};
2427: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2428: print $store $what;
2429: close $store;
2430: print $client "$id\n";
2431: }
2432: else {
2433: print $client "error: ".($!+0)
2434: ."IO::File->new Failed ".
2435: "while attempting tmpput\n";
2436: }
2437: } else {
2438: Reply($client, "refused\n", $userinput);
2439:
2440: }
2441:
2442: # ---------------------------------------------------------------------- tmpget
2443: } elsif ($userinput =~ /^tmpget/) {
2444: if(isClient) {
2445: my ($cmd,$id)=split(/:/,$userinput);
2446: chomp($id);
2447: $id=~s/\W/\_/g;
2448: my $store;
2449: my $execdir=$perlvar{'lonDaemons'};
2450: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2451: my $reply=<$store>;
2452: print $client "$reply\n";
2453: close $store;
2454: }
2455: else {
2456: print $client "error: ".($!+0)
2457: ."IO::File->new Failed ".
2458: "while attempting tmpget\n";
2459: }
2460: } else {
2461: Reply($client, "refused\n", $userinput);
2462:
2463: }
2464: # ---------------------------------------------------------------------- tmpdel
2465: } elsif ($userinput =~ /^tmpdel/) {
2466: if(isClient) {
2467: my ($cmd,$id)=split(/:/,$userinput);
2468: chomp($id);
2469: $id=~s/\W/\_/g;
2470: my $execdir=$perlvar{'lonDaemons'};
2471: if (unlink("$execdir/tmp/$id.tmp")) {
2472: print $client "ok\n";
2473: } else {
2474: print $client "error: ".($!+0)
2475: ."Unlink tmp Failed ".
2476: "while attempting tmpdel\n";
2477: }
2478: } else {
2479: Reply($client, "refused\n", $userinput);
2480:
2481: }
2482: # -------------------------------------------------------------------------- ls
2483: } elsif ($userinput =~ /^ls/) {
2484: if(isClient) {
2485: my ($cmd,$ulsdir)=split(/:/,$userinput);
2486: my $ulsout='';
2487: my $ulsfn;
2488: if (-e $ulsdir) {
2489: if(-d $ulsdir) {
2490: if (opendir(LSDIR,$ulsdir)) {
2491: while ($ulsfn=readdir(LSDIR)) {
2492: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2493: $ulsout.=$ulsfn.'&'.
2494: join('&',@ulsstats).':';
2495: }
2496: closedir(LSDIR);
2497: }
2498: } else {
2499: my @ulsstats=stat($ulsdir);
2500: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2501: }
2502: } else {
2503: $ulsout='no_such_dir';
2504: }
2505: if ($ulsout eq '') { $ulsout='empty'; }
2506: print $client "$ulsout\n";
2507: } else {
2508: Reply($client, "refused\n", $userinput);
2509:
2510: }
2511: # ----------------------------------------------------------------- setannounce
2512: } elsif ($userinput =~ /^setannounce/) {
2513: if (isClient) {
2514: my ($cmd,$announcement)=split(/:/,$userinput);
2515: chomp($announcement);
2516: $announcement=&unescape($announcement);
2517: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2518: '/announcement.txt')) {
2519: print $store $announcement;
2520: close $store;
2521: print $client "ok\n";
2522: } else {
2523: print $client "error: ".($!+0)."\n";
2524: }
2525: } else {
2526: Reply($client, "refused\n", $userinput);
2527:
2528: }
2529: # ------------------------------------------------------------------ Hanging up
2530: } elsif (($userinput =~ /^exit/) ||
2531: ($userinput =~ /^init/)) { # no restrictions.
2532: &logthis(
2533: "Client $clientip ($clientname) hanging up: $userinput");
2534: print $client "bye\n";
2535: $client->shutdown(2); # shutdown the socket forcibly.
2536: $client->close();
2537: last;
2538:
2539: # ---------------------------------- set current host/domain
2540: } elsif ($userinput =~ /^sethost:/) {
2541: if (isClient) {
2542: print $client &sethost($userinput)."\n";
2543: } else {
2544: print $client "refused\n";
2545: }
2546: #---------------------------------- request file (?) version.
2547: } elsif ($userinput =~/^version:/) {
2548: if (isClient) {
2549: print $client &version($userinput)."\n";
2550: } else {
2551: print $client "refused\n";
2552: }
2553: # ------------------------------------------------------------- unknown command
2554:
2555: } else {
2556: # unknown command
2557: print $client "unknown_cmd\n";
2558: }
2559: # -------------------------------------------------------------------- complete
2560: alarm(0);
2561: &status('Listening to '.$clientname);
2562: }
2563: # --------------------------------------------- client unknown or fishy, refuse
2564: } else {
2565: print $client "refused\n";
2566: $client->close();
2567: &logthis("<font color=blue>WARNING: "
2568: ."Rejected client $clientip, closing connection</font>");
2569: }
2570: }
2571:
2572: # =============================================================================
2573:
2574: &logthis("<font color=red>CRITICAL: "
2575: ."Disconnect from $clientip ($clientname)</font>");
2576:
2577:
2578: # this exit is VERY important, otherwise the child will become
2579: # a producer of more and more children, forking yourself into
2580: # process death.
2581: exit;
2582:
2583: }
2584:
2585:
2586: #
2587: # Checks to see if the input roleput request was to set
2588: # an author role. If so, invokes the lchtmldir script to set
2589: # up a correct public_html
2590: # Parameters:
2591: # request - The request sent to the rolesput subchunk.
2592: # We're looking for /domain/_au
2593: # domain - The domain in which the user is having roles doctored.
2594: # user - Name of the user for which the role is being put.
2595: # authtype - The authentication type associated with the user.
2596: #
2597: sub ManagePermissions
2598: {
2599: my $request = shift;
2600: my $domain = shift;
2601: my $user = shift;
2602: my $authtype= shift;
2603:
2604: # See if the request is of the form /$domain/_au
2605: &logthis("ruequest is $request");
2606: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
2607: my $execdir = $perlvar{'lonDaemons'};
2608: my $userhome= "/home/$user" ;
2609: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
2610: system("$execdir/lchtmldir $userhome $user $authtype");
2611: }
2612: }
2613: #
2614: # GetAuthType - Determines the authorization type of a user in a domain.
2615:
2616: # Returns the authorization type or nouser if there is no such user.
2617: #
2618: sub GetAuthType
2619: {
2620: my $domain = shift;
2621: my $user = shift;
2622:
2623: Debug("GetAuthType( $domain, $user ) \n");
2624: my $proname = &propath($domain, $user);
2625: my $passwdfile = "$proname/passwd";
2626: if( -e $passwdfile ) {
2627: my $pf = IO::File->new($passwdfile);
2628: my $realpassword = <$pf>;
2629: chomp($realpassword);
2630: Debug("Password info = $realpassword\n");
2631: my ($authtype, $contentpwd) = split(/:/, $realpassword);
2632: Debug("Authtype = $authtype, content = $contentpwd\n");
2633: my $availinfo = '';
2634: if($authtype eq 'krb4' or $authtype eq 'krb5') {
2635: $availinfo = $contentpwd;
2636: }
2637:
2638: return "$authtype:$availinfo";
2639: }
2640: else {
2641: Debug("Returning nouser");
2642: return "nouser";
2643: }
2644: }
2645:
2646: sub addline {
2647: my ($fname,$hostid,$ip,$newline)=@_;
2648: my $contents;
2649: my $found=0;
2650: my $expr='^'.$hostid.':'.$ip.':';
2651: $expr =~ s/\./\\\./g;
2652: my $sh;
2653: if ($sh=IO::File->new("$fname.subscription")) {
2654: while (my $subline=<$sh>) {
2655: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
2656: }
2657: $sh->close();
2658: }
2659: $sh=IO::File->new(">$fname.subscription");
2660: if ($contents) { print $sh $contents; }
2661: if ($newline) { print $sh $newline; }
2662: $sh->close();
2663: return $found;
2664: }
2665:
2666: sub getchat {
2667: my ($cdom,$cname,$udom,$uname)=@_;
2668: my %hash;
2669: my $proname=&propath($cdom,$cname);
2670: my @entries=();
2671: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2672: &GDBM_READER(),0640)) {
2673: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2674: untie %hash;
2675: }
2676: my @participants=();
2677: my $cutoff=time-60;
2678: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
2679: &GDBM_WRCREAT(),0640)) {
2680: $hash{$uname.':'.$udom}=time;
2681: foreach (sort keys %hash) {
2682: if ($hash{$_}>$cutoff) {
2683: $participants[$#participants+1]='active_participant:'.$_;
2684: }
2685: }
2686: untie %hash;
2687: }
2688: return (@participants,@entries);
2689: }
2690:
2691: sub chatadd {
2692: my ($cdom,$cname,$newchat)=@_;
2693: my %hash;
2694: my $proname=&propath($cdom,$cname);
2695: my @entries=();
2696: my $time=time;
2697: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2698: &GDBM_WRCREAT(),0640)) {
2699: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2700: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
2701: my ($thentime,$idnum)=split(/\_/,$lastid);
2702: my $newid=$time.'_000000';
2703: if ($thentime==$time) {
2704: $idnum=~s/^0+//;
2705: $idnum++;
2706: $idnum=substr('000000'.$idnum,-6,6);
2707: $newid=$time.'_'.$idnum;
2708: }
2709: $hash{$newid}=$newchat;
2710: my $expired=$time-3600;
2711: foreach (keys %hash) {
2712: my ($thistime)=($_=~/(\d+)\_/);
2713: if ($thistime<$expired) {
2714: delete $hash{$_};
2715: }
2716: }
2717: untie %hash;
2718: }
2719: {
2720: my $hfh;
2721: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
2722: print $hfh "$time:".&unescape($newchat)."\n";
2723: }
2724: }
2725: }
2726:
2727: sub unsub {
2728: my ($fname,$clientip)=@_;
2729: my $result;
2730: if (unlink("$fname.$clientname")) {
2731: $result="ok\n";
2732: } else {
2733: $result="not_subscribed\n";
2734: }
2735: if (-e "$fname.subscription") {
2736: my $found=&addline($fname,$clientname,$clientip,'');
2737: if ($found) { $result="ok\n"; }
2738: } else {
2739: if ($result != "ok\n") { $result="not_subscribed\n"; }
2740: }
2741: return $result;
2742: }
2743:
2744: sub currentversion {
2745: my $fname=shift;
2746: my $version=-1;
2747: my $ulsdir='';
2748: if ($fname=~/^(.+)\/[^\/]+$/) {
2749: $ulsdir=$1;
2750: }
2751: my ($fnamere1,$fnamere2);
2752: # remove version if already specified
2753: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
2754: # get the bits that go before and after the version number
2755: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
2756: $fnamere1=$1;
2757: $fnamere2='.'.$2;
2758: }
2759: if (-e $fname) { $version=1; }
2760: if (-e $ulsdir) {
2761: if(-d $ulsdir) {
2762: if (opendir(LSDIR,$ulsdir)) {
2763: my $ulsfn;
2764: while ($ulsfn=readdir(LSDIR)) {
2765: # see if this is a regular file (ignore links produced earlier)
2766: my $thisfile=$ulsdir.'/'.$ulsfn;
2767: unless (-l $thisfile) {
2768: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
2769: if ($1>$version) { $version=$1; }
2770: }
2771: }
2772: }
2773: closedir(LSDIR);
2774: $version++;
2775: }
2776: }
2777: }
2778: return $version;
2779: }
2780:
2781: sub thisversion {
2782: my $fname=shift;
2783: my $version=-1;
2784: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
2785: $version=$1;
2786: }
2787: return $version;
2788: }
2789:
2790: sub subscribe {
2791: my ($userinput,$clientip)=@_;
2792: my $result;
2793: my ($cmd,$fname)=split(/:/,$userinput);
2794: my $ownership=&ishome($fname);
2795: if ($ownership eq 'owner') {
2796: # explitly asking for the current version?
2797: unless (-e $fname) {
2798: my $currentversion=¤tversion($fname);
2799: if (&thisversion($fname)==$currentversion) {
2800: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
2801: my $root=$1;
2802: my $extension=$2;
2803: symlink($root.'.'.$extension,
2804: $root.'.'.$currentversion.'.'.$extension);
2805: unless ($extension=~/\.meta$/) {
2806: symlink($root.'.'.$extension.'.meta',
2807: $root.'.'.$currentversion.'.'.$extension.'.meta');
2808: }
2809: }
2810: }
2811: }
2812: if (-e $fname) {
2813: if (-d $fname) {
2814: $result="directory\n";
2815: } else {
2816: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
2817: my $now=time;
2818: my $found=&addline($fname,$clientname,$clientip,
2819: "$clientname:$clientip:$now\n");
2820: if ($found) { $result="$fname\n"; }
2821: # if they were subscribed to only meta data, delete that
2822: # subscription, when you subscribe to a file you also get
2823: # the metadata
2824: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
2825: $fname=~s/\/home\/httpd\/html\/res/raw/;
2826: $fname="http://$thisserver/".$fname;
2827: $result="$fname\n";
2828: }
2829: } else {
2830: $result="not_found\n";
2831: }
2832: } else {
2833: $result="rejected\n";
2834: }
2835: return $result;
2836: }
2837:
2838: sub make_passwd_file {
2839: my ($uname, $umode,$npass,$passfilename)=@_;
2840: my $result="ok\n";
2841: if ($umode eq 'krb4' or $umode eq 'krb5') {
2842: {
2843: my $pf = IO::File->new(">$passfilename");
2844: print $pf "$umode:$npass\n";
2845: }
2846: } elsif ($umode eq 'internal') {
2847: my $salt=time;
2848: $salt=substr($salt,6,2);
2849: my $ncpass=crypt($npass,$salt);
2850: {
2851: &Debug("Creating internal auth");
2852: my $pf = IO::File->new(">$passfilename");
2853: print $pf "internal:$ncpass\n";
2854: }
2855: } elsif ($umode eq 'localauth') {
2856: {
2857: my $pf = IO::File->new(">$passfilename");
2858: print $pf "localauth:$npass\n";
2859: }
2860: } elsif ($umode eq 'unix') {
2861: {
2862: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
2863: {
2864: &Debug("Executing external: ".$execpath);
2865: &Debug("user = ".$uname.", Password =". $npass);
2866: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
2867: print $se "$uname\n";
2868: print $se "$npass\n";
2869: print $se "$npass\n";
2870: }
2871: my $useraddok = $?;
2872: if($useraddok > 0) {
2873: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
2874: }
2875: my $pf = IO::File->new(">$passfilename");
2876: print $pf "unix:\n";
2877: }
2878: } elsif ($umode eq 'none') {
2879: {
2880: my $pf = IO::File->new(">$passfilename");
2881: print $pf "none:\n";
2882: }
2883: } else {
2884: $result="auth_mode_error\n";
2885: }
2886: return $result;
2887: }
2888:
2889: sub sethost {
2890: my ($remotereq) = @_;
2891: my (undef,$hostid)=split(/:/,$remotereq);
2892: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
2893: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
2894: $currenthostid=$hostid;
2895: $currentdomainid=$hostdom{$hostid};
2896: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
2897: } else {
2898: &logthis("Requested host id $hostid not an alias of ".
2899: $perlvar{'lonHostID'}." refusing connection");
2900: return 'unable_to_set';
2901: }
2902: return 'ok';
2903: }
2904:
2905: sub version {
2906: my ($userinput)=@_;
2907: $remoteVERSION=(split(/:/,$userinput))[1];
2908: return "version:$VERSION";
2909: }
2910:
2911: #There is a copy of this in lonnet.pm
2912: sub userload {
2913: my $numusers=0;
2914: {
2915: opendir(LONIDS,$perlvar{'lonIDsDir'});
2916: my $filename;
2917: my $curtime=time;
2918: while ($filename=readdir(LONIDS)) {
2919: if ($filename eq '.' || $filename eq '..') {next;}
2920: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
2921: if ($curtime-$mtime < 1800) { $numusers++; }
2922: }
2923: closedir(LONIDS);
2924: }
2925: my $userloadpercent=0;
2926: my $maxuserload=$perlvar{'lonUserLoadLim'};
2927: if ($maxuserload) {
2928: $userloadpercent=100*$numusers/$maxuserload;
2929: }
2930: $userloadpercent=sprintf("%.2f",$userloadpercent);
2931: return $userloadpercent;
2932: }
2933:
2934: # ----------------------------------- POD (plain old documentation, CPAN style)
2935:
2936: =head1 NAME
2937:
2938: lond - "LON Daemon" Server (port "LOND" 5663)
2939:
2940: =head1 SYNOPSIS
2941:
2942: Usage: B<lond>
2943:
2944: Should only be run as user=www. This is a command-line script which
2945: is invoked by B<loncron>. There is no expectation that a typical user
2946: will manually start B<lond> from the command-line. (In other words,
2947: DO NOT START B<lond> YOURSELF.)
2948:
2949: =head1 DESCRIPTION
2950:
2951: There are two characteristics associated with the running of B<lond>,
2952: PROCESS MANAGEMENT (starting, stopping, handling child processes)
2953: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
2954: subscriptions, etc). These are described in two large
2955: sections below.
2956:
2957: B<PROCESS MANAGEMENT>
2958:
2959: Preforker - server who forks first. Runs as a daemon. HUPs.
2960: Uses IDEA encryption
2961:
2962: B<lond> forks off children processes that correspond to the other servers
2963: in the network. Management of these processes can be done at the
2964: parent process level or the child process level.
2965:
2966: B<logs/lond.log> is the location of log messages.
2967:
2968: The process management is now explained in terms of linux shell commands,
2969: subroutines internal to this code, and signal assignments:
2970:
2971: =over 4
2972:
2973: =item *
2974:
2975: PID is stored in B<logs/lond.pid>
2976:
2977: This is the process id number of the parent B<lond> process.
2978:
2979: =item *
2980:
2981: SIGTERM and SIGINT
2982:
2983: Parent signal assignment:
2984: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
2985:
2986: Child signal assignment:
2987: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
2988: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
2989: to restart a new child.)
2990:
2991: Command-line invocations:
2992: B<kill> B<-s> SIGTERM I<PID>
2993: B<kill> B<-s> SIGINT I<PID>
2994:
2995: Subroutine B<HUNTSMAN>:
2996: This is only invoked for the B<lond> parent I<PID>.
2997: This kills all the children, and then the parent.
2998: The B<lonc.pid> file is cleared.
2999:
3000: =item *
3001:
3002: SIGHUP
3003:
3004: Current bug:
3005: This signal can only be processed the first time
3006: on the parent process. Subsequent SIGHUP signals
3007: have no effect.
3008:
3009: Parent signal assignment:
3010: $SIG{HUP} = \&HUPSMAN;
3011:
3012: Child signal assignment:
3013: none (nothing happens)
3014:
3015: Command-line invocations:
3016: B<kill> B<-s> SIGHUP I<PID>
3017:
3018: Subroutine B<HUPSMAN>:
3019: This is only invoked for the B<lond> parent I<PID>,
3020: This kills all the children, and then the parent.
3021: The B<lond.pid> file is cleared.
3022:
3023: =item *
3024:
3025: SIGUSR1
3026:
3027: Parent signal assignment:
3028: $SIG{USR1} = \&USRMAN;
3029:
3030: Child signal assignment:
3031: $SIG{USR1}= \&logstatus;
3032:
3033: Command-line invocations:
3034: B<kill> B<-s> SIGUSR1 I<PID>
3035:
3036: Subroutine B<USRMAN>:
3037: When invoked for the B<lond> parent I<PID>,
3038: SIGUSR1 is sent to all the children, and the status of
3039: each connection is logged.
3040:
3041: =item *
3042:
3043: SIGUSR2
3044:
3045: Parent Signal assignment:
3046: $SIG{USR2} = \&UpdateHosts
3047:
3048: Child signal assignment:
3049: NONE
3050:
3051:
3052: =item *
3053:
3054: SIGCHLD
3055:
3056: Parent signal assignment:
3057: $SIG{CHLD} = \&REAPER;
3058:
3059: Child signal assignment:
3060: none
3061:
3062: Command-line invocations:
3063: B<kill> B<-s> SIGCHLD I<PID>
3064:
3065: Subroutine B<REAPER>:
3066: This is only invoked for the B<lond> parent I<PID>.
3067: Information pertaining to the child is removed.
3068: The socket port is cleaned up.
3069:
3070: =back
3071:
3072: B<SERVER-SIDE ACTIVITIES>
3073:
3074: Server-side information can be accepted in an encrypted or non-encrypted
3075: method.
3076:
3077: =over 4
3078:
3079: =item ping
3080:
3081: Query a client in the hosts.tab table; "Are you there?"
3082:
3083: =item pong
3084:
3085: Respond to a ping query.
3086:
3087: =item ekey
3088:
3089: Read in encrypted key, make cipher. Respond with a buildkey.
3090:
3091: =item load
3092:
3093: Respond with CPU load based on a computation upon /proc/loadavg.
3094:
3095: =item currentauth
3096:
3097: Reply with current authentication information (only over an
3098: encrypted channel).
3099:
3100: =item auth
3101:
3102: Only over an encrypted channel, reply as to whether a user's
3103: authentication information can be validated.
3104:
3105: =item passwd
3106:
3107: Allow for a password to be set.
3108:
3109: =item makeuser
3110:
3111: Make a user.
3112:
3113: =item passwd
3114:
3115: Allow for authentication mechanism and password to be changed.
3116:
3117: =item home
3118:
3119: Respond to a question "are you the home for a given user?"
3120:
3121: =item update
3122:
3123: Update contents of a subscribed resource.
3124:
3125: =item unsubscribe
3126:
3127: The server is unsubscribing from a resource.
3128:
3129: =item subscribe
3130:
3131: The server is subscribing to a resource.
3132:
3133: =item log
3134:
3135: Place in B<logs/lond.log>
3136:
3137: =item put
3138:
3139: stores hash in namespace
3140:
3141: =item rolesput
3142:
3143: put a role into a user's environment
3144:
3145: =item get
3146:
3147: returns hash with keys from array
3148: reference filled in from namespace
3149:
3150: =item eget
3151:
3152: returns hash with keys from array
3153: reference filled in from namesp (encrypts the return communication)
3154:
3155: =item rolesget
3156:
3157: get a role from a user's environment
3158:
3159: =item del
3160:
3161: deletes keys out of array from namespace
3162:
3163: =item keys
3164:
3165: returns namespace keys
3166:
3167: =item dump
3168:
3169: dumps the complete (or key matching regexp) namespace into a hash
3170:
3171: =item store
3172:
3173: stores hash permanently
3174: for this url; hashref needs to be given and should be a \%hashname; the
3175: remaining args aren't required and if they aren't passed or are '' they will
3176: be derived from the ENV
3177:
3178: =item restore
3179:
3180: returns a hash for a given url
3181:
3182: =item querysend
3183:
3184: Tells client about the lonsql process that has been launched in response
3185: to a sent query.
3186:
3187: =item queryreply
3188:
3189: Accept information from lonsql and make appropriate storage in temporary
3190: file space.
3191:
3192: =item idput
3193:
3194: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
3195: for each student, defined perhaps by the institutional Registrar.)
3196:
3197: =item idget
3198:
3199: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
3200: for each student, defined perhaps by the institutional Registrar.)
3201:
3202: =item tmpput
3203:
3204: Accept and store information in temporary space.
3205:
3206: =item tmpget
3207:
3208: Send along temporarily stored information.
3209:
3210: =item ls
3211:
3212: List part of a user's directory.
3213:
3214: =item pushtable
3215:
3216: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
3217: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
3218: must be restored manually in case of a problem with the new table file.
3219: pushtable requires that the request be encrypted and validated via
3220: ValidateManager. The form of the command is:
3221: enc:pushtable tablename <tablecontents> \n
3222: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
3223: cleartext newline.
3224:
3225: =item Hanging up (exit or init)
3226:
3227: What to do when a client tells the server that they (the client)
3228: are leaving the network.
3229:
3230: =item unknown command
3231:
3232: If B<lond> is sent an unknown command (not in the list above),
3233: it replys to the client "unknown_cmd".
3234:
3235:
3236: =item UNKNOWN CLIENT
3237:
3238: If the anti-spoofing algorithm cannot verify the client,
3239: the client is rejected (with a "refused" message sent
3240: to the client, and the connection is closed.
3241:
3242: =back
3243:
3244: =head1 PREREQUISITES
3245:
3246: IO::Socket
3247: IO::File
3248: Apache::File
3249: Symbol
3250: POSIX
3251: Crypt::IDEA
3252: LWP::UserAgent()
3253: GDBM_File
3254: Authen::Krb4
3255: Authen::Krb5
3256:
3257: =head1 COREQUISITES
3258:
3259: =head1 OSNAMES
3260:
3261: linux
3262:
3263: =head1 SCRIPT CATEGORIES
3264:
3265: Server/Process
3266:
3267: =cut
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