File:
[LON-CAPA] /
loncom /
lond
Revision
1.161:
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Tue Nov 11 12:39:14 2003 UTC (20 years, 5 months ago) by
foxr
Branches:
MAIN
CVS tags:
HEAD
Support manager/client distinction. Connection distinction tested,
client functionality tested, still need to re-test management
functionality.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.161 2003/11/11 12:39:14 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: 1.161 $'; #' 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 (!defined $hostip{$host}) { # This is a non cluster member
177:
178: # The entry is of the form:
179: # cluname:hostname
180: # cluname - A 'cluster hostname' is needed in order to negotiate
181: # the host key.
182: # hostname- The dns name of the host.
183: #
184:
185: my($cluname, $dnsname) = split(/:/, $host);
186: open(MGRPIPE, "/usr/bin/host $dnsname |") || die "Can't make host pipeline";
187: my $dnsinfo = <MGRPIPE>;
188: chomp $dnsinfo;
189: close MGRPIPE;
190: my($jname, $jhas, $jaddress, $hostip) = split(/ /, $dnsinfo);
191: $managers{$hostip} = $cluname;
192: } else {
193: $managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber
194: }
195: }
196: }
197:
198: #
199: # ValidManager: Determines if a given certificate represents a valid manager.
200: # in this primitive implementation, the 'certificate' is
201: # just the connecting loncapa client name. This is checked
202: # against a valid client list in the configuration.
203: #
204: #
205: sub ValidManager {
206: my $certificate = shift;
207:
208: ReadManagerTable;
209:
210: my $hostname = $hostid{$certificate};
211:
212:
213: if ($hostname ne undef) {
214: if($managers{$hostname} ne undef) {
215: &logthis('<font color="yellow">Authenticating manager'.
216: " $hostname</font>");
217: return 1;
218: } else {
219: &logthis('<font color="red" failed manager authentication '.
220: $hostname." is not a valid manager host</font>");
221: return 0;
222: }
223: } else {
224: &logthis('<font color="red"> Failed manager authentication '.
225: "$certificate </font>");
226: return 0;
227: }
228: }
229: #
230: # CopyFile: Called as part of the process of installing a
231: # new configuration file. This function copies an existing
232: # file to a backup file.
233: # Parameters:
234: # oldfile - Name of the file to backup.
235: # newfile - Name of the backup file.
236: # Return:
237: # 0 - Failure (errno has failure reason).
238: # 1 - Success.
239: #
240: sub CopyFile {
241: my $oldfile = shift;
242: my $newfile = shift;
243:
244: # The file must exist:
245:
246: if(-e $oldfile) {
247:
248: # Read the old file.
249:
250: my $oldfh = IO::File->new("< $oldfile");
251: if(!$oldfh) {
252: return 0;
253: }
254: my @contents = <$oldfh>; # Suck in the entire file.
255:
256: # write the backup file:
257:
258: my $newfh = IO::File->new("> $newfile");
259: if(!(defined $newfh)){
260: return 0;
261: }
262: my $lines = scalar @contents;
263: for (my $i =0; $i < $lines; $i++) {
264: print $newfh ($contents[$i]);
265: }
266:
267: $oldfh->close;
268: $newfh->close;
269:
270: chmod(0660, $newfile);
271:
272: return 1;
273:
274: } else {
275: return 0;
276: }
277: }
278: #
279: # Host files are passed out with externally visible host IPs.
280: # If, for example, we are behind a fire-wall or NAT host, our
281: # internally visible IP may be different than the externally
282: # visible IP. Therefore, we always adjust the contents of the
283: # host file so that the entry for ME is the IP that we believe
284: # we have. At present, this is defined as the entry that
285: # DNS has for us. If by some chance we are not able to get a
286: # DNS translation for us, then we assume that the host.tab file
287: # is correct.
288: # BUGBUGBUG - in the future, we really should see if we can
289: # easily query the interface(s) instead.
290: # Parameter(s):
291: # contents - The contents of the host.tab to check.
292: # Returns:
293: # newcontents - The adjusted contents.
294: #
295: #
296: sub AdjustHostContents {
297: my $contents = shift;
298: my $adjusted;
299: my $me = $perlvar{'lonHostID'};
300:
301: foreach my $line (split(/\n/,$contents)) {
302: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
303: chomp($line);
304: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
305: if ($id eq $me) {
306: open(PIPE, " /usr/bin/host $name |") || die "Cant' make host pipeline";
307: my $hostinfo = <PIPE>;
308: close PIPE;
309:
310: my ($hostname, $has, $address, $ipnew) = split(/ /,$hostinfo);
311: &logthis('<font color="green">'.
312: "hostname = $hostname me = $me, name = $name actual ip = $ipnew </font>");
313:
314: if ($hostname eq $name) { # Lookup succeeded..
315: &logthis('<font color="green"> look up ok <font>');
316: $ip = $ipnew;
317: } else {
318: &logthis('<font color="green"> Lookup failed: '
319: .$hostname." ne $name </font>");
320: }
321: # Reconstruct the host line and append to adjusted:
322:
323: my $newline = "$id:$domain:$role:$name:$ip";
324: if($maxcon ne "") { # Not all hosts have loncnew tuning params
325: $newline .= ":$maxcon:$idleto:$mincon";
326: }
327: $adjusted .= $newline."\n";
328:
329: } else { # Not me, pass unmodified.
330: $adjusted .= $line."\n";
331: }
332: } else { # Blank or comment never re-written.
333: $adjusted .= $line."\n"; # Pass blanks and comments as is.
334: }
335: }
336: return $adjusted;
337: }
338: #
339: # InstallFile: Called to install an administrative file:
340: # - The file is created with <name>.tmp
341: # - The <name>.tmp file is then mv'd to <name>
342: # This lugubrious procedure is done to ensure that we are never without
343: # a valid, even if dated, version of the file regardless of who crashes
344: # and when the crash occurs.
345: #
346: # Parameters:
347: # Name of the file
348: # File Contents.
349: # Return:
350: # nonzero - success.
351: # 0 - failure and $! has an errno.
352: #
353: sub InstallFile {
354: my $Filename = shift;
355: my $Contents = shift;
356: my $TempFile = $Filename.".tmp";
357:
358: # Open the file for write:
359:
360: my $fh = IO::File->new("> $TempFile"); # Write to temp.
361: if(!(defined $fh)) {
362: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
363: return 0;
364: }
365: # write the contents of the file:
366:
367: print $fh ($Contents);
368: $fh->close; # In case we ever have a filesystem w. locking
369:
370: chmod(0660, $TempFile);
371:
372: # Now we can move install the file in position.
373:
374: move($TempFile, $Filename);
375:
376: return 1;
377: }
378:
379: #
380: # PushFile: Called to do an administrative push of a file.
381: # - Ensure the file being pushed is one we support.
382: # - Backup the old file to <filename.saved>
383: # - Separate the contents of the new file out from the
384: # rest of the request.
385: # - Write the new file.
386: # Parameter:
387: # Request - The entire user request. This consists of a : separated
388: # string pushfile:tablename:contents.
389: # NOTE: The contents may have :'s in it as well making things a bit
390: # more interesting... but not much.
391: # Returns:
392: # String to send to client ("ok" or "refused" if bad file).
393: #
394: sub PushFile {
395: my $request = shift;
396: my ($command, $filename, $contents) = split(":", $request, 3);
397:
398: # At this point in time, pushes for only the following tables are
399: # supported:
400: # hosts.tab ($filename eq host).
401: # domain.tab ($filename eq domain).
402: # Construct the destination filename or reject the request.
403: #
404: # lonManage is supposed to ensure this, however this session could be
405: # part of some elaborate spoof that managed somehow to authenticate.
406: #
407:
408: my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
409: if ($filename eq "host") {
410: $tablefile .= "hosts.tab";
411: } elsif ($filename eq "domain") {
412: $tablefile .= "domain.tab";
413: } else {
414: return "refused";
415: }
416: #
417: # >copy< the old table to the backup table
418: # don't rename in case system crashes/reboots etc. in the time
419: # window between a rename and write.
420: #
421: my $backupfile = $tablefile;
422: $backupfile =~ s/\.tab$/.old/;
423: if(!CopyFile($tablefile, $backupfile)) {
424: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
425: return "error:$!";
426: }
427: &logthis('<font color="green"> Pushfile: backed up '
428: .$tablefile." to $backupfile</font>");
429:
430: # If the file being pushed is the host file, we adjust the entry for ourself so that the
431: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible
432: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a
433: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
434: # that possibilty.
435:
436: if($filename eq "host") {
437: $contents = AdjustHostContents($contents);
438: }
439:
440: # Install the new file:
441:
442: if(!InstallFile($tablefile, $contents)) {
443: &logthis('<font color="red"> Pushfile: unable to install '
444: .$tablefile." $! </font>");
445: return "error:$!";
446: }
447: else {
448: &logthis('<font color="green"> Installed new '.$tablefile
449: ."</font>");
450:
451: }
452:
453:
454: # Indicate success:
455:
456: return "ok";
457:
458: }
459:
460: #
461: # Called to re-init either lonc or lond.
462: #
463: # Parameters:
464: # request - The full request by the client. This is of the form
465: # reinit:<process>
466: # where <process> is allowed to be either of
467: # lonc or lond
468: #
469: # Returns:
470: # The string to be sent back to the client either:
471: # ok - Everything worked just fine.
472: # error:why - There was a failure and why describes the reason.
473: #
474: #
475: sub ReinitProcess {
476: my $request = shift;
477:
478:
479: # separate the request (reinit) from the process identifier and
480: # validate it producing the name of the .pid file for the process.
481: #
482: #
483: my ($junk, $process) = split(":", $request);
484: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
485: if($process eq 'lonc') {
486: $processpidfile = $processpidfile."lonc.pid";
487: if (!open(PIDFILE, "< $processpidfile")) {
488: return "error:Open failed for $processpidfile";
489: }
490: my $loncpid = <PIDFILE>;
491: close(PIDFILE);
492: logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
493: ."</font>");
494: kill("USR2", $loncpid);
495: } elsif ($process eq 'lond') {
496: logthis('<font color="red"> Reinitializing self (lond) </font>');
497: &UpdateHosts; # Lond is us!!
498: } else {
499: &logthis('<font color="yellow" Invalid reinit request for '.$process
500: ."</font>");
501: return "error:Invalid process identifier $process";
502: }
503: return 'ok';
504: }
505:
506: #
507: # Convert an error return code from lcpasswd to a string value.
508: #
509: sub lcpasswdstrerror {
510: my $ErrorCode = shift;
511: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
512: return "lcpasswd Unrecognized error return value ".$ErrorCode;
513: } else {
514: return $passwderrors[$ErrorCode];
515: }
516: }
517:
518: #
519: # Convert an error return code from lcuseradd to a string value:
520: #
521: sub lcuseraddstrerror {
522: my $ErrorCode = shift;
523: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
524: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
525: } else {
526: return $adderrors[$ErrorCode];
527: }
528: }
529:
530: # grabs exception and records it to log before exiting
531: sub catchexception {
532: my ($error)=@_;
533: $SIG{'QUIT'}='DEFAULT';
534: $SIG{__DIE__}='DEFAULT';
535: &logthis("<font color=red>CRITICAL: "
536: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
537: ."a crash with this error msg->[$error]</font>");
538: &logthis('Famous last words: '.$status.' - '.$lastlog);
539: if ($client) { print $client "error: $error\n"; }
540: $server->close();
541: die($error);
542: }
543:
544: sub timeout {
545: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
546: &catchexception('Timeout');
547: }
548: # -------------------------------- Set signal handlers to record abnormal exits
549:
550: $SIG{'QUIT'}=\&catchexception;
551: $SIG{__DIE__}=\&catchexception;
552:
553: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
554: &status("Read loncapa.conf and loncapa_apache.conf");
555: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
556: %perlvar=%{$perlvarref};
557: undef $perlvarref;
558:
559: # ----------------------------- Make sure this process is running from user=www
560: my $wwwid=getpwnam('www');
561: if ($wwwid!=$<) {
562: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
563: my $subj="LON: $currenthostid User ID mismatch";
564: system("echo 'User ID mismatch. lond must be run as user www.' |\
565: mailto $emailto -s '$subj' > /dev/null");
566: exit 1;
567: }
568:
569: # --------------------------------------------- Check if other instance running
570:
571: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
572:
573: if (-e $pidfile) {
574: my $lfh=IO::File->new("$pidfile");
575: my $pide=<$lfh>;
576: chomp($pide);
577: if (kill 0 => $pide) { die "already running"; }
578: }
579:
580: # ------------------------------------------------------------- Read hosts file
581:
582:
583:
584: # establish SERVER socket, bind and listen.
585: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
586: Type => SOCK_STREAM,
587: Proto => 'tcp',
588: Reuse => 1,
589: Listen => 10 )
590: or die "making socket: $@\n";
591:
592: # --------------------------------------------------------- Do global variables
593:
594: # global variables
595:
596: my %children = (); # keys are current child process IDs
597: my $children = 0; # current number of children
598:
599: sub REAPER { # takes care of dead children
600: $SIG{CHLD} = \&REAPER;
601: my $pid = wait;
602: if (defined($children{$pid})) {
603: &logthis("Child $pid died");
604: $children --;
605: delete $children{$pid};
606: } else {
607: &logthis("Unknown Child $pid died");
608: }
609: }
610:
611: sub HUNTSMAN { # signal handler for SIGINT
612: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
613: kill 'INT' => keys %children;
614: &logthis("Free socket: ".shutdown($server,2)); # free up socket
615: my $execdir=$perlvar{'lonDaemons'};
616: unlink("$execdir/logs/lond.pid");
617: &logthis("<font color=red>CRITICAL: Shutting down</font>");
618: exit; # clean up with dignity
619: }
620:
621: sub HUPSMAN { # signal handler for SIGHUP
622: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
623: kill 'INT' => keys %children;
624: &logthis("Free socket: ".shutdown($server,2)); # free up socket
625: &logthis("<font color=red>CRITICAL: Restarting</font>");
626: my $execdir=$perlvar{'lonDaemons'};
627: unlink("$execdir/logs/lond.pid");
628: exec("$execdir/lond"); # here we go again
629: }
630:
631: #
632: # Kill off hashes that describe the host table prior to re-reading it.
633: # Hashes affected are:
634: # %hostid, %hostdom %hostip
635: #
636: sub KillHostHashes {
637: foreach my $key (keys %hostid) {
638: delete $hostid{$key};
639: }
640: foreach my $key (keys %hostdom) {
641: delete $hostdom{$key};
642: }
643: foreach my $key (keys %hostip) {
644: delete $hostip{$key};
645: }
646: }
647: #
648: # Read in the host table from file and distribute it into the various hashes:
649: #
650: # - %hostid - Indexed by IP, the loncapa hostname.
651: # - %hostdom - Indexed by loncapa hostname, the domain.
652: # - %hostip - Indexed by hostid, the Ip address of the host.
653: sub ReadHostTable {
654:
655: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
656:
657: while (my $configline=<CONFIG>) {
658: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
659: chomp($ip); $ip=~s/\D+$//;
660: $hostid{$ip}=$id;
661: $hostdom{$id}=$domain;
662: $hostip{$id}=$ip;
663: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
664: }
665: close(CONFIG);
666: }
667: #
668: # Reload the Apache daemon's state.
669: # This is done by invoking /home/httpd/perl/apachereload
670: # a setuid perl script that can be root for us to do this job.
671: #
672: sub ReloadApache {
673: my $execdir = $perlvar{'lonDaemons'};
674: my $script = $execdir."/apachereload";
675: system($script);
676: }
677:
678: #
679: # Called in response to a USR2 signal.
680: # - Reread hosts.tab
681: # - All children connected to hosts that were removed from hosts.tab
682: # are killed via SIGINT
683: # - All children connected to previously existing hosts are sent SIGUSR1
684: # - Our internal hosts hash is updated to reflect the new contents of
685: # hosts.tab causing connections from hosts added to hosts.tab to
686: # now be honored.
687: #
688: sub UpdateHosts {
689: logthis('<font color="blue"> Updating connections </font>');
690: #
691: # The %children hash has the set of IP's we currently have children
692: # on. These need to be matched against records in the hosts.tab
693: # Any ip's no longer in the table get killed off they correspond to
694: # either dropped or changed hosts. Note that the re-read of the table
695: # will take care of new and changed hosts as connections come into being.
696:
697:
698: KillHostHashes;
699: ReadHostTable;
700:
701: foreach my $child (keys %children) {
702: my $childip = $children{$child};
703: if(!$hostid{$childip}) {
704: logthis('<font color="blue"> UpdateHosts killing child '
705: ." $child for ip $childip </font>");
706: kill('INT', $child);
707: } else {
708: logthis('<font color="green"> keeping child for ip '
709: ." $childip (pid=$child) </font>");
710: }
711: }
712: ReloadApache;
713: }
714:
715:
716: sub checkchildren {
717: &initnewstatus();
718: &logstatus();
719: &logthis('Going to check on the children');
720: my $docdir=$perlvar{'lonDocRoot'};
721: foreach (sort keys %children) {
722: sleep 1;
723: unless (kill 'USR1' => $_) {
724: &logthis ('Child '.$_.' is dead');
725: &logstatus($$.' is dead');
726: }
727: }
728: sleep 5;
729: $SIG{ALRM} = sub { die "timeout" };
730: $SIG{__DIE__} = 'DEFAULT';
731: foreach (sort keys %children) {
732: unless (-e "$docdir/lon-status/londchld/$_.txt") {
733: eval {
734: alarm(300);
735: &logthis('Child '.$_.' did not respond');
736: kill 9 => $_;
737: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
738: #$subj="LON: $currenthostid killed lond process $_";
739: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
740: #$execdir=$perlvar{'lonDaemons'};
741: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
742: alarm(0);
743: }
744: }
745: }
746: $SIG{ALRM} = 'DEFAULT';
747: $SIG{__DIE__} = \&catchexception;
748: }
749:
750: # --------------------------------------------------------------------- Logging
751:
752: sub logthis {
753: my $message=shift;
754: my $execdir=$perlvar{'lonDaemons'};
755: my $fh=IO::File->new(">>$execdir/logs/lond.log");
756: my $now=time;
757: my $local=localtime($now);
758: $lastlog=$local.': '.$message;
759: print $fh "$local ($$): $message\n";
760: }
761:
762: # ------------------------- Conditional log if $DEBUG true.
763: sub Debug {
764: my $message = shift;
765: if($DEBUG) {
766: &logthis($message);
767: }
768: }
769:
770: #
771: # Sub to do replies to client.. this gives a hook for some
772: # debug tracing too:
773: # Parameters:
774: # fd - File open on client.
775: # reply - Text to send to client.
776: # request - Original request from client.
777: #
778: sub Reply {
779: my $fd = shift;
780: my $reply = shift;
781: my $request = shift;
782:
783: print $fd $reply;
784: Debug("Request was $request Reply was $reply");
785:
786: }
787: # ------------------------------------------------------------------ Log status
788:
789: sub logstatus {
790: my $docdir=$perlvar{'lonDocRoot'};
791: {
792: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
793: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
794: $fh->close();
795: }
796: {
797: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
798: print $fh $status."\n".$lastlog."\n".time;
799: $fh->close();
800: }
801: }
802:
803: sub initnewstatus {
804: my $docdir=$perlvar{'lonDocRoot'};
805: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
806: my $now=time;
807: my $local=localtime($now);
808: print $fh "LOND status $local - parent $$\n\n";
809: opendir(DIR,"$docdir/lon-status/londchld");
810: while (my $filename=readdir(DIR)) {
811: unlink("$docdir/lon-status/londchld/$filename");
812: }
813: closedir(DIR);
814: }
815:
816: # -------------------------------------------------------------- Status setting
817:
818: sub status {
819: my $what=shift;
820: my $now=time;
821: my $local=localtime($now);
822: $status=$local.': '.$what;
823: $0='lond: '.$what.' '.$local;
824: }
825:
826: # -------------------------------------------------------- Escape Special Chars
827:
828: sub escape {
829: my $str=shift;
830: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
831: return $str;
832: }
833:
834: # ----------------------------------------------------- Un-Escape Special Chars
835:
836: sub unescape {
837: my $str=shift;
838: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
839: return $str;
840: }
841:
842: # ----------------------------------------------------------- Send USR1 to lonc
843:
844: sub reconlonc {
845: my $peerfile=shift;
846: &logthis("Trying to reconnect for $peerfile");
847: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
848: if (my $fh=IO::File->new("$loncfile")) {
849: my $loncpid=<$fh>;
850: chomp($loncpid);
851: if (kill 0 => $loncpid) {
852: &logthis("lonc at pid $loncpid responding, sending USR1");
853: kill USR1 => $loncpid;
854: } else {
855: &logthis(
856: "<font color=red>CRITICAL: "
857: ."lonc at pid $loncpid not responding, giving up</font>");
858: }
859: } else {
860: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
861: }
862: }
863:
864: # -------------------------------------------------- Non-critical communication
865:
866: sub subreply {
867: my ($cmd,$server)=@_;
868: my $peerfile="$perlvar{'lonSockDir'}/$server";
869: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
870: Type => SOCK_STREAM,
871: Timeout => 10)
872: or return "con_lost";
873: print $sclient "$cmd\n";
874: my $answer=<$sclient>;
875: chomp($answer);
876: if (!$answer) { $answer="con_lost"; }
877: return $answer;
878: }
879:
880: sub reply {
881: my ($cmd,$server)=@_;
882: my $answer;
883: if ($server ne $currenthostid) {
884: $answer=subreply($cmd,$server);
885: if ($answer eq 'con_lost') {
886: $answer=subreply("ping",$server);
887: if ($answer ne $server) {
888: &logthis("sub reply: answer != server answer is $answer, server is $server");
889: &reconlonc("$perlvar{'lonSockDir'}/$server");
890: }
891: $answer=subreply($cmd,$server);
892: }
893: } else {
894: $answer='self_reply';
895: }
896: return $answer;
897: }
898:
899: # -------------------------------------------------------------- Talk to lonsql
900:
901: sub sqlreply {
902: my ($cmd)=@_;
903: my $answer=subsqlreply($cmd);
904: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
905: return $answer;
906: }
907:
908: sub subsqlreply {
909: my ($cmd)=@_;
910: my $unixsock="mysqlsock";
911: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
912: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
913: Type => SOCK_STREAM,
914: Timeout => 10)
915: or return "con_lost";
916: print $sclient "$cmd\n";
917: my $answer=<$sclient>;
918: chomp($answer);
919: if (!$answer) { $answer="con_lost"; }
920: return $answer;
921: }
922:
923: # -------------------------------------------- Return path to profile directory
924:
925: sub propath {
926: my ($udom,$uname)=@_;
927: $udom=~s/\W//g;
928: $uname=~s/\W//g;
929: my $subdir=$uname.'__';
930: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
931: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
932: return $proname;
933: }
934:
935: # --------------------------------------- Is this the home server of an author?
936:
937: sub ishome {
938: my $author=shift;
939: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
940: my ($udom,$uname)=split(/\//,$author);
941: my $proname=propath($udom,$uname);
942: if (-e $proname) {
943: return 'owner';
944: } else {
945: return 'not_owner';
946: }
947: }
948:
949: # ======================================================= Continue main program
950: # ---------------------------------------------------- Fork once and dissociate
951:
952: my $fpid=fork;
953: exit if $fpid;
954: die "Couldn't fork: $!" unless defined ($fpid);
955:
956: POSIX::setsid() or die "Can't start new session: $!";
957:
958: # ------------------------------------------------------- Write our PID on disk
959:
960: my $execdir=$perlvar{'lonDaemons'};
961: open (PIDSAVE,">$execdir/logs/lond.pid");
962: print PIDSAVE "$$\n";
963: close(PIDSAVE);
964: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
965: &status('Starting');
966:
967:
968:
969: # ----------------------------------------------------- Install signal handlers
970:
971:
972: $SIG{CHLD} = \&REAPER;
973: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
974: $SIG{HUP} = \&HUPSMAN;
975: $SIG{USR1} = \&checkchildren;
976: $SIG{USR2} = \&UpdateHosts;
977:
978: # Read the host hashes:
979:
980: ReadHostTable;
981:
982: # --------------------------------------------------------------
983: # Accept connections. When a connection comes in, it is validated
984: # and if good, a child process is created to process transactions
985: # along the connection.
986:
987: while (1) {
988: $client = $server->accept() or next;
989: make_new_child($client);
990: }
991:
992: sub make_new_child {
993: my $pid;
994: my $cipher;
995: my $sigset;
996:
997: $client = shift;
998: &logthis('<font color="green"> Attempting to start child ('.$client.
999: ")</font>");
1000: # block signal for fork
1001: $sigset = POSIX::SigSet->new(SIGINT);
1002: sigprocmask(SIG_BLOCK, $sigset)
1003: or die "Can't block SIGINT for fork: $!\n";
1004:
1005: die "fork: $!" unless defined ($pid = fork);
1006:
1007: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
1008: # connection liveness.
1009:
1010: #
1011: # Figure out who we're talking to so we can record the peer in
1012: # the pid hash.
1013: #
1014: my $caller = getpeername($client);
1015: my ($port,$iaddr)=unpack_sockaddr_in($caller);
1016: $clientip=inet_ntoa($iaddr);
1017:
1018: if ($pid) {
1019: # Parent records the child's birth and returns.
1020: sigprocmask(SIG_UNBLOCK, $sigset)
1021: or die "Can't unblock SIGINT for fork: $!\n";
1022: $children{$pid} = $clientip;
1023: $children++;
1024: &status('Started child '.$pid);
1025: return;
1026: } else {
1027: # Child can *not* return from this subroutine.
1028: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1029: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
1030: #don't get intercepted
1031: $SIG{USR1}= \&logstatus;
1032: $SIG{ALRM}= \&timeout;
1033: $lastlog='Forked ';
1034: $status='Forked';
1035:
1036: # unblock signals
1037: sigprocmask(SIG_UNBLOCK, $sigset)
1038: or die "Can't unblock SIGINT for fork: $!\n";
1039:
1040: my $tmpsnum=0;
1041: #---------------------------------------------------- kerberos 5 initialization
1042: &Authen::Krb5::init_context();
1043: &Authen::Krb5::init_ets();
1044:
1045: &status('Accepted connection');
1046: # =============================================================================
1047: # do something with the connection
1048: # -----------------------------------------------------------------------------
1049: # see if we know client and check for spoof IP by challenge
1050:
1051: ReadManagerTable; # May also be a manager!!
1052:
1053: my $clientrec=($hostid{$clientip} ne undef);
1054: my $ismanager=($managers{$clientip} ne undef);
1055: $clientname = "[unknonwn]";
1056: if($clientrec) { # Establish client type.
1057: $ConnectionType = "client";
1058: $clientname = $hostid{$clientip};
1059: if($ismanager) {
1060: $ConnectionType = "both";
1061: }
1062: } else {
1063: $ConnectionType = "manager";
1064: $clientname = $managers{$clientip};
1065: }
1066: my $clientok;
1067: if ($clientrec || $ismanager) {
1068: &status("Waiting for init from $clientip $clientname");
1069: &logthis('<font color="yellow">INFO: Connection, '.
1070: $clientip.
1071: " ($clientname) connection type = $ConnectionType </font>" );
1072: &status("Connecting $clientip ($clientname))");
1073: my $remotereq=<$client>;
1074: $remotereq=~s/[^\w:]//g;
1075: if ($remotereq =~ /^init/) {
1076: &sethost("sethost:$perlvar{'lonHostID'}");
1077: my $challenge="$$".time;
1078: print $client "$challenge\n";
1079: &status(
1080: "Waiting for challenge reply from $clientip ($clientname)");
1081: $remotereq=<$client>;
1082: $remotereq=~s/\W//g;
1083: if ($challenge eq $remotereq) {
1084: $clientok=1;
1085: print $client "ok\n";
1086: } else {
1087: &logthis(
1088: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
1089: &status('No challenge reply '.$clientip);
1090: }
1091: } else {
1092: &logthis(
1093: "<font color=blue>WARNING: "
1094: ."$clientip failed to initialize: >$remotereq< </font>");
1095: &status('No init '.$clientip);
1096: }
1097: } else {
1098: &logthis(
1099: "<font color=blue>WARNING: Unknown client $clientip</font>");
1100: &status('Hung up on '.$clientip);
1101: }
1102: if ($clientok) {
1103: # ---------------- New known client connecting, could mean machine online again
1104:
1105: foreach my $id (keys(%hostip)) {
1106: if ($hostip{$id} ne $clientip ||
1107: $hostip{$currenthostid} eq $clientip) {
1108: # no need to try to do recon's to myself
1109: next;
1110: }
1111: &reconlonc("$perlvar{'lonSockDir'}/$id");
1112: }
1113: &logthis("<font color=green>Established connection: $clientname</font>");
1114: &status('Will listen to '.$clientname);
1115: # ------------------------------------------------------------ Process requests
1116: while (my $userinput=<$client>) {
1117: chomp($userinput);
1118: Debug("Request = $userinput\n");
1119: &status('Processing '.$clientname.': '.$userinput);
1120: my $wasenc=0;
1121: alarm(120);
1122: # ------------------------------------------------------------ See if encrypted
1123: if ($userinput =~ /^enc/) {
1124: if ($cipher) {
1125: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
1126: $userinput='';
1127: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
1128: $userinput.=
1129: $cipher->decrypt(
1130: pack("H16",substr($encinput,$encidx,16))
1131: );
1132: }
1133: $userinput=substr($userinput,0,$cmdlength);
1134: $wasenc=1;
1135: }
1136: }
1137:
1138: # ------------------------------------------------------------- Normal commands
1139: # ------------------------------------------------------------------------ ping
1140: if ($userinput =~ /^ping/) { # client only
1141: if(isClient) {
1142: print $client "$currenthostid\n";
1143: } else {
1144: Reply($client, "refused\n", $userinput);
1145: }
1146: # ------------------------------------------------------------------------ pong
1147: }elsif ($userinput =~ /^pong/) { # client only
1148: if(isClient) {
1149: my $reply=&reply("ping",$clientname);
1150: print $client "$currenthostid:$reply\n";
1151: } else {
1152: Reply($client, "refused\n", $userinput);
1153: }
1154: # ------------------------------------------------------------------------ ekey
1155: } elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
1156: my $buildkey=time.$$.int(rand 100000);
1157: $buildkey=~tr/1-6/A-F/;
1158: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
1159: my $key=$currenthostid.$clientname;
1160: $key=~tr/a-z/A-Z/;
1161: $key=~tr/G-P/0-9/;
1162: $key=~tr/Q-Z/0-9/;
1163: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
1164: $key=substr($key,0,32);
1165: my $cipherkey=pack("H32",$key);
1166: $cipher=new IDEA $cipherkey;
1167: print $client "$buildkey\n";
1168: # ------------------------------------------------------------------------ load
1169: } elsif ($userinput =~ /^load/) { # client only
1170: if (isClient) {
1171: my $loadavg;
1172: {
1173: my $loadfile=IO::File->new('/proc/loadavg');
1174: $loadavg=<$loadfile>;
1175: }
1176: $loadavg =~ s/\s.*//g;
1177: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
1178: print $client "$loadpercent\n";
1179: } else {
1180: Reply($client, "refused\n", $userinput);
1181:
1182: }
1183: # -------------------------------------------------------------------- userload
1184: } elsif ($userinput =~ /^userload/) { # client only
1185: if(isClient) {
1186: my $userloadpercent=&userload();
1187: print $client "$userloadpercent\n";
1188: } else {
1189: Reply($client, "refused\n", $userinput);
1190:
1191: }
1192: #
1193: # Transactions requiring encryption:
1194: #
1195: # ----------------------------------------------------------------- currentauth
1196: } elsif ($userinput =~ /^currentauth/) {
1197: if (($wasenc==1) && isClient) { # Encoded & client only.
1198: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1199: my $result = GetAuthType($udom, $uname);
1200: if($result eq "nouser") {
1201: print $client "unknown_user\n";
1202: }
1203: else {
1204: print $client "$result\n"
1205: }
1206: } else {
1207: Reply($client, "refused\n", $userinput);
1208:
1209: }
1210: #--------------------------------------------------------------------- pushfile
1211: } elsif($userinput =~ /^pushfile/) { # encoded & manager.
1212: if(($wasenc == 1) && isManager) {
1213: my $cert = GetCertificate($userinput);
1214: if(ValidManager($cert)) {
1215: my $reply = PushFile($userinput);
1216: print $client "$reply\n";
1217: } else {
1218: print $client "refused\n";
1219: }
1220: } else {
1221: Reply($client, "refused\n", $userinput);
1222:
1223: }
1224: #--------------------------------------------------------------------- reinit
1225: } elsif($userinput =~ /^reinit/) { # Encoded and manager
1226: if (($wasenc == 1) && isManager) {
1227: my $cert = GetCertificate($userinput);
1228: if(ValidManager($cert)) {
1229: chomp($userinput);
1230: my $reply = ReinitProcess($userinput);
1231: print $client "$reply\n";
1232: } else {
1233: print $client "refused\n";
1234: }
1235: } else {
1236: Reply($client, "refused\n", $userinput);
1237:
1238:
1239: }
1240: # ------------------------------------------------------------------------ auth
1241: } elsif ($userinput =~ /^auth/) { # Encoded and client only.
1242: if (($wasenc==1) && isClient) {
1243: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
1244: chomp($upass);
1245: $upass=unescape($upass);
1246: my $proname=propath($udom,$uname);
1247: my $passfilename="$proname/passwd";
1248: if (-e $passfilename) {
1249: my $pf = IO::File->new($passfilename);
1250: my $realpasswd=<$pf>;
1251: chomp($realpasswd);
1252: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1253: my $pwdcorrect=0;
1254: if ($howpwd eq 'internal') {
1255: &Debug("Internal auth");
1256: $pwdcorrect=
1257: (crypt($upass,$contentpwd) eq $contentpwd);
1258: } elsif ($howpwd eq 'unix') {
1259: &Debug("Unix auth");
1260: if((getpwnam($uname))[1] eq "") { #no such user!
1261: $pwdcorrect = 0;
1262: } else {
1263: $contentpwd=(getpwnam($uname))[1];
1264: my $pwauth_path="/usr/local/sbin/pwauth";
1265: unless ($contentpwd eq 'x') {
1266: $pwdcorrect=
1267: (crypt($upass,$contentpwd) eq
1268: $contentpwd);
1269: }
1270:
1271: elsif (-e $pwauth_path) {
1272: open PWAUTH, "|$pwauth_path" or
1273: die "Cannot invoke authentication";
1274: print PWAUTH "$uname\n$upass\n";
1275: close PWAUTH;
1276: $pwdcorrect=!$?;
1277: }
1278: }
1279: } elsif ($howpwd eq 'krb4') {
1280: my $null=pack("C",0);
1281: unless ($upass=~/$null/) {
1282: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
1283: ($uname,"",$contentpwd,'krbtgt',
1284: $contentpwd,1,$upass);
1285: if (!$krb4_error) {
1286: $pwdcorrect = 1;
1287: } else {
1288: $pwdcorrect=0;
1289: # log error if it is not a bad password
1290: if ($krb4_error != 62) {
1291: &logthis('krb4:'.$uname.','.$contentpwd.','.
1292: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
1293: }
1294: }
1295: }
1296: } elsif ($howpwd eq 'krb5') {
1297: my $null=pack("C",0);
1298: unless ($upass=~/$null/) {
1299: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1300: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1301: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1302: my $credentials=&Authen::Krb5::cc_default();
1303: $credentials->initialize($krbclient);
1304: my $krbreturn =
1305: &Authen::Krb5::get_in_tkt_with_password(
1306: $krbclient,$krbserver,$upass,$credentials);
1307: # unless ($krbreturn) {
1308: # &logthis("Krb5 Error: ".
1309: # &Authen::Krb5::error());
1310: # }
1311: $pwdcorrect = ($krbreturn == 1);
1312: } else { $pwdcorrect=0; }
1313: } elsif ($howpwd eq 'localauth') {
1314: $pwdcorrect=&localauth::localauth($uname,$upass,
1315: $contentpwd);
1316: }
1317: if ($pwdcorrect) {
1318: print $client "authorized\n";
1319: } else {
1320: print $client "non_authorized\n";
1321: }
1322: } else {
1323: print $client "unknown_user\n";
1324: }
1325: } else {
1326: Reply($client, "refused\n", $userinput);
1327:
1328: }
1329: # ---------------------------------------------------------------------- passwd
1330: } elsif ($userinput =~ /^passwd/) { # encoded and client
1331: if (($wasenc==1) && isClient) {
1332: my
1333: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1334: chomp($npass);
1335: $upass=&unescape($upass);
1336: $npass=&unescape($npass);
1337: &Debug("Trying to change password for $uname");
1338: my $proname=propath($udom,$uname);
1339: my $passfilename="$proname/passwd";
1340: if (-e $passfilename) {
1341: my $realpasswd;
1342: { my $pf = IO::File->new($passfilename);
1343: $realpasswd=<$pf>; }
1344: chomp($realpasswd);
1345: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1346: if ($howpwd eq 'internal') {
1347: &Debug("internal auth");
1348: if (crypt($upass,$contentpwd) eq $contentpwd) {
1349: my $salt=time;
1350: $salt=substr($salt,6,2);
1351: my $ncpass=crypt($npass,$salt);
1352: {
1353: my $pf;
1354: if ($pf = IO::File->new(">$passfilename")) {
1355: print $pf "internal:$ncpass\n";
1356: &logthis("Result of password change for $uname: pwchange_success");
1357: print $client "ok\n";
1358: } else {
1359: &logthis("Unable to open $uname passwd to change password");
1360: print $client "non_authorized\n";
1361: }
1362: }
1363:
1364: } else {
1365: print $client "non_authorized\n";
1366: }
1367: } elsif ($howpwd eq 'unix') {
1368: # Unix means we have to access /etc/password
1369: # one way or another.
1370: # First: Make sure the current password is
1371: # correct
1372: &Debug("auth is unix");
1373: $contentpwd=(getpwnam($uname))[1];
1374: my $pwdcorrect = "0";
1375: my $pwauth_path="/usr/local/sbin/pwauth";
1376: unless ($contentpwd eq 'x') {
1377: $pwdcorrect=
1378: (crypt($upass,$contentpwd) eq $contentpwd);
1379: } elsif (-e $pwauth_path) {
1380: open PWAUTH, "|$pwauth_path" or
1381: die "Cannot invoke authentication";
1382: print PWAUTH "$uname\n$upass\n";
1383: close PWAUTH;
1384: &Debug("exited pwauth with $? ($uname,$upass) ");
1385: $pwdcorrect=($? == 0);
1386: }
1387: if ($pwdcorrect) {
1388: my $execdir=$perlvar{'lonDaemons'};
1389: &Debug("Opening lcpasswd pipeline");
1390: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1391: print $pf "$uname\n$npass\n$npass\n";
1392: close $pf;
1393: my $err = $?;
1394: my $result = ($err>0 ? 'pwchange_failure'
1395: : 'ok');
1396: &logthis("Result of password change for $uname: ".
1397: &lcpasswdstrerror($?));
1398: print $client "$result\n";
1399: } else {
1400: print $client "non_authorized\n";
1401: }
1402: } else {
1403: print $client "auth_mode_error\n";
1404: }
1405: } else {
1406: print $client "unknown_user\n";
1407: }
1408: } else {
1409: Reply($client, "refused\n", $userinput);
1410:
1411: }
1412: # -------------------------------------------------------------------- makeuser
1413: } elsif ($userinput =~ /^makeuser/) { # encoded and client.
1414: &Debug("Make user received");
1415: my $oldumask=umask(0077);
1416: if (($wasenc==1) && isClient) {
1417: my
1418: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1419: &Debug("cmd =".$cmd." $udom =".$udom.
1420: " uname=".$uname);
1421: chomp($npass);
1422: $npass=&unescape($npass);
1423: my $proname=propath($udom,$uname);
1424: my $passfilename="$proname/passwd";
1425: &Debug("Password file created will be:".
1426: $passfilename);
1427: if (-e $passfilename) {
1428: print $client "already_exists\n";
1429: } elsif ($udom ne $currentdomainid) {
1430: print $client "not_right_domain\n";
1431: } else {
1432: my @fpparts=split(/\//,$proname);
1433: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1434: my $fperror='';
1435: for (my $i=3;$i<=$#fpparts;$i++) {
1436: $fpnow.='/'.$fpparts[$i];
1437: unless (-e $fpnow) {
1438: unless (mkdir($fpnow,0777)) {
1439: $fperror="error: ".($!+0)
1440: ." mkdir failed while attempting "
1441: ."makeuser\n";
1442: }
1443: }
1444: }
1445: unless ($fperror) {
1446: my $result=&make_passwd_file($uname, $umode,$npass,
1447: $passfilename);
1448: print $client $result;
1449: } else {
1450: print $client "$fperror\n";
1451: }
1452: }
1453: } else {
1454: Reply($client, "refused\n", $userinput);
1455:
1456: }
1457: umask($oldumask);
1458: # -------------------------------------------------------------- changeuserauth
1459: } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
1460: &Debug("Changing authorization");
1461: if (($wasenc==1) && isClient) {
1462: my
1463: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1464: chomp($npass);
1465: &Debug("cmd = ".$cmd." domain= ".$udom.
1466: "uname =".$uname." umode= ".$umode);
1467: $npass=&unescape($npass);
1468: my $proname=&propath($udom,$uname);
1469: my $passfilename="$proname/passwd";
1470: if ($udom ne $currentdomainid) {
1471: print $client "not_right_domain\n";
1472: } else {
1473: my $result=&make_passwd_file($uname, $umode,$npass,
1474: $passfilename);
1475: print $client $result;
1476: }
1477: } else {
1478: Reply($client, "refused\n", $userinput);
1479:
1480: }
1481: # ------------------------------------------------------------------------ home
1482: } elsif ($userinput =~ /^home/) { # client clear or encoded
1483: if(isClient) {
1484: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1485: chomp($uname);
1486: my $proname=propath($udom,$uname);
1487: if (-e $proname) {
1488: print $client "found\n";
1489: } else {
1490: print $client "not_found\n";
1491: }
1492: } else {
1493: Reply($client, "refused\n", $userinput);
1494:
1495: }
1496: # ---------------------------------------------------------------------- update
1497: } elsif ($userinput =~ /^update/) { # client clear or encoded.
1498: if(isClient) {
1499: my ($cmd,$fname)=split(/:/,$userinput);
1500: my $ownership=ishome($fname);
1501: if ($ownership eq 'not_owner') {
1502: if (-e $fname) {
1503: my ($dev,$ino,$mode,$nlink,
1504: $uid,$gid,$rdev,$size,
1505: $atime,$mtime,$ctime,
1506: $blksize,$blocks)=stat($fname);
1507: my $now=time;
1508: my $since=$now-$atime;
1509: if ($since>$perlvar{'lonExpire'}) {
1510: my $reply=
1511: &reply("unsub:$fname","$clientname");
1512: unlink("$fname");
1513: } else {
1514: my $transname="$fname.in.transfer";
1515: my $remoteurl=
1516: &reply("sub:$fname","$clientname");
1517: my $response;
1518: {
1519: my $ua=new LWP::UserAgent;
1520: my $request=new HTTP::Request('GET',"$remoteurl");
1521: $response=$ua->request($request,$transname);
1522: }
1523: if ($response->is_error()) {
1524: unlink($transname);
1525: my $message=$response->status_line;
1526: &logthis(
1527: "LWP GET: $message for $fname ($remoteurl)");
1528: } else {
1529: if ($remoteurl!~/\.meta$/) {
1530: my $ua=new LWP::UserAgent;
1531: my $mrequest=
1532: new HTTP::Request('GET',$remoteurl.'.meta');
1533: my $mresponse=
1534: $ua->request($mrequest,$fname.'.meta');
1535: if ($mresponse->is_error()) {
1536: unlink($fname.'.meta');
1537: }
1538: }
1539: rename($transname,$fname);
1540: }
1541: }
1542: print $client "ok\n";
1543: } else {
1544: print $client "not_found\n";
1545: }
1546: } else {
1547: print $client "rejected\n";
1548: }
1549: } else {
1550: Reply($client, "refused\n", $userinput);
1551:
1552: }
1553: # -------------------------------------- fetch a user file from a remote server
1554: } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
1555: if(isClient) {
1556: my ($cmd,$fname)=split(/:/,$userinput);
1557: my ($udom,$uname,$ufile)=split(/\//,$fname);
1558: my $udir=propath($udom,$uname).'/userfiles';
1559: unless (-e $udir) { mkdir($udir,0770); }
1560: if (-e $udir) {
1561: $ufile=~s/^[\.\~]+//;
1562: $ufile=~s/\///g;
1563: my $destname=$udir.'/'.$ufile;
1564: my $transname=$udir.'/'.$ufile.'.in.transit';
1565: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1566: my $response;
1567: {
1568: my $ua=new LWP::UserAgent;
1569: my $request=new HTTP::Request('GET',"$remoteurl");
1570: $response=$ua->request($request,$transname);
1571: }
1572: if ($response->is_error()) {
1573: unlink($transname);
1574: my $message=$response->status_line;
1575: &logthis("LWP GET: $message for $fname ($remoteurl)");
1576: print $client "failed\n";
1577: } else {
1578: if (!rename($transname,$destname)) {
1579: &logthis("Unable to move $transname to $destname");
1580: unlink($transname);
1581: print $client "failed\n";
1582: } else {
1583: print $client "ok\n";
1584: }
1585: }
1586: } else {
1587: print $client "not_home\n";
1588: }
1589: } else {
1590: Reply($client, "refused\n", $userinput);
1591:
1592: }
1593: # ------------------------------------------ authenticate access to a user file
1594: } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
1595: if(isClient) {
1596: my ($cmd,$fname,$session)=split(/:/,$userinput);
1597: chomp($session);
1598: my $reply='non_auth';
1599: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1600: $session.'.id')) {
1601: while (my $line=<ENVIN>) {
1602: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1603: }
1604: close(ENVIN);
1605: print $client $reply."\n";
1606: } else {
1607: print $client "invalid_token\n";
1608: }
1609: } else {
1610: Reply($client, "refused\n", $userinput);
1611:
1612: }
1613: # ----------------------------------------------------------------- unsubscribe
1614: } elsif ($userinput =~ /^unsub/) {
1615: if(isClient) {
1616: my ($cmd,$fname)=split(/:/,$userinput);
1617: if (-e $fname) {
1618: print $client &unsub($client,$fname,$clientip);
1619: } else {
1620: print $client "not_found\n";
1621: }
1622: } else {
1623: Reply($client, "refused\n", $userinput);
1624:
1625: }
1626: # ------------------------------------------------------------------- subscribe
1627: } elsif ($userinput =~ /^sub/) {
1628: if(isClient) {
1629: print $client &subscribe($userinput,$clientip);
1630: } else {
1631: Reply($client, "refused\n", $userinput);
1632:
1633: }
1634: # ------------------------------------------------------------- current version
1635: } elsif ($userinput =~ /^currentversion/) {
1636: if(isClient) {
1637: my ($cmd,$fname)=split(/:/,$userinput);
1638: print $client ¤tversion($fname)."\n";
1639: } else {
1640: Reply($client, "refused\n", $userinput);
1641:
1642: }
1643: # ------------------------------------------------------------------------- log
1644: } elsif ($userinput =~ /^log/) {
1645: if(isClient) {
1646: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1647: chomp($what);
1648: my $proname=propath($udom,$uname);
1649: my $now=time;
1650: {
1651: my $hfh;
1652: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1653: print $hfh "$now:$clientname:$what\n";
1654: print $client "ok\n";
1655: } else {
1656: print $client "error: ".($!+0)
1657: ." IO::File->new Failed "
1658: ."while attempting log\n";
1659: }
1660: }
1661: } else {
1662: Reply($client, "refused\n", $userinput);
1663:
1664: }
1665: # ------------------------------------------------------------------------- put
1666: } elsif ($userinput =~ /^put/) {
1667: if(isClient) {
1668: my ($cmd,$udom,$uname,$namespace,$what)
1669: =split(/:/,$userinput);
1670: $namespace=~s/\//\_/g;
1671: $namespace=~s/\W//g;
1672: if ($namespace ne 'roles') {
1673: chomp($what);
1674: my $proname=propath($udom,$uname);
1675: my $now=time;
1676: unless ($namespace=~/^nohist\_/) {
1677: my $hfh;
1678: if (
1679: $hfh=IO::File->new(">>$proname/$namespace.hist")
1680: ) { print $hfh "P:$now:$what\n"; }
1681: }
1682: my @pairs=split(/\&/,$what);
1683: my %hash;
1684: if (tie(%hash,'GDBM_File',
1685: "$proname/$namespace.db",
1686: &GDBM_WRCREAT(),0640)) {
1687: foreach my $pair (@pairs) {
1688: my ($key,$value)=split(/=/,$pair);
1689: $hash{$key}=$value;
1690: }
1691: if (untie(%hash)) {
1692: print $client "ok\n";
1693: } else {
1694: print $client "error: ".($!+0)
1695: ." untie(GDBM) failed ".
1696: "while attempting put\n";
1697: }
1698: } else {
1699: print $client "error: ".($!)
1700: ." tie(GDBM) Failed ".
1701: "while attempting put\n";
1702: }
1703: } else {
1704: print $client "refused\n";
1705: }
1706: } else {
1707: Reply($client, "refused\n", $userinput);
1708:
1709: }
1710: # -------------------------------------------------------------------- rolesput
1711: } elsif ($userinput =~ /^rolesput/) {
1712: if(isClient) {
1713: &Debug("rolesput");
1714: if ($wasenc==1) {
1715: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1716: =split(/:/,$userinput);
1717: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1718: "user = ".$exeuser." udom=".$udom.
1719: "what = ".$what);
1720: my $namespace='roles';
1721: chomp($what);
1722: my $proname=propath($udom,$uname);
1723: my $now=time;
1724: {
1725: my $hfh;
1726: if (
1727: $hfh=IO::File->new(">>$proname/$namespace.hist")
1728: ) {
1729: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1730: }
1731: }
1732: my @pairs=split(/\&/,$what);
1733: my %hash;
1734: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1735: foreach my $pair (@pairs) {
1736: my ($key,$value)=split(/=/,$pair);
1737: &ManagePermissions($key, $udom, $uname,
1738: &GetAuthType( $udom,
1739: $uname));
1740: $hash{$key}=$value;
1741: }
1742: if (untie(%hash)) {
1743: print $client "ok\n";
1744: } else {
1745: print $client "error: ".($!+0)
1746: ." untie(GDBM) Failed ".
1747: "while attempting rolesput\n";
1748: }
1749: } else {
1750: print $client "error: ".($!+0)
1751: ." tie(GDBM) Failed ".
1752: "while attempting rolesput\n";
1753: }
1754: } else {
1755: print $client "refused\n";
1756: }
1757: } else {
1758: Reply($client, "refused\n", $userinput);
1759:
1760: }
1761: # -------------------------------------------------------------------- rolesdel
1762: } elsif ($userinput =~ /^rolesdel/) {
1763: if(isClient) {
1764: &Debug("rolesdel");
1765: if ($wasenc==1) {
1766: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1767: =split(/:/,$userinput);
1768: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1769: "user = ".$exeuser." udom=".$udom.
1770: "what = ".$what);
1771: my $namespace='roles';
1772: chomp($what);
1773: my $proname=propath($udom,$uname);
1774: my $now=time;
1775: {
1776: my $hfh;
1777: if (
1778: $hfh=IO::File->new(">>$proname/$namespace.hist")
1779: ) {
1780: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1781: }
1782: }
1783: my @rolekeys=split(/\&/,$what);
1784: my %hash;
1785: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1786: foreach my $key (@rolekeys) {
1787: delete $hash{$key};
1788: }
1789: if (untie(%hash)) {
1790: print $client "ok\n";
1791: } else {
1792: print $client "error: ".($!+0)
1793: ." untie(GDBM) Failed ".
1794: "while attempting rolesdel\n";
1795: }
1796: } else {
1797: print $client "error: ".($!+0)
1798: ." tie(GDBM) Failed ".
1799: "while attempting rolesdel\n";
1800: }
1801: } else {
1802: print $client "refused\n";
1803: }
1804: } else {
1805: Reply($client, "refused\n", $userinput);
1806:
1807: }
1808: # ------------------------------------------------------------------------- get
1809: } elsif ($userinput =~ /^get/) {
1810: if(isClient) {
1811: my ($cmd,$udom,$uname,$namespace,$what)
1812: =split(/:/,$userinput);
1813: $namespace=~s/\//\_/g;
1814: $namespace=~s/\W//g;
1815: chomp($what);
1816: my @queries=split(/\&/,$what);
1817: my $proname=propath($udom,$uname);
1818: my $qresult='';
1819: my %hash;
1820: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1821: for (my $i=0;$i<=$#queries;$i++) {
1822: $qresult.="$hash{$queries[$i]}&";
1823: }
1824: if (untie(%hash)) {
1825: $qresult=~s/\&$//;
1826: print $client "$qresult\n";
1827: } else {
1828: print $client "error: ".($!+0)
1829: ." untie(GDBM) Failed ".
1830: "while attempting get\n";
1831: }
1832: } else {
1833: if ($!+0 == 2) {
1834: print $client "error:No such file or ".
1835: "GDBM reported bad block error\n";
1836: } else {
1837: print $client "error: ".($!+0)
1838: ." tie(GDBM) Failed ".
1839: "while attempting get\n";
1840: }
1841: }
1842: } else {
1843: Reply($client, "refused\n", $userinput);
1844:
1845: }
1846: # ------------------------------------------------------------------------ eget
1847: } elsif ($userinput =~ /^eget/) {
1848: if (isClient) {
1849: my ($cmd,$udom,$uname,$namespace,$what)
1850: =split(/:/,$userinput);
1851: $namespace=~s/\//\_/g;
1852: $namespace=~s/\W//g;
1853: chomp($what);
1854: my @queries=split(/\&/,$what);
1855: my $proname=propath($udom,$uname);
1856: my $qresult='';
1857: my %hash;
1858: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1859: for (my $i=0;$i<=$#queries;$i++) {
1860: $qresult.="$hash{$queries[$i]}&";
1861: }
1862: if (untie(%hash)) {
1863: $qresult=~s/\&$//;
1864: if ($cipher) {
1865: my $cmdlength=length($qresult);
1866: $qresult.=" ";
1867: my $encqresult='';
1868: for
1869: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1870: $encqresult.=
1871: unpack("H16",
1872: $cipher->encrypt(substr($qresult,$encidx,8)));
1873: }
1874: print $client "enc:$cmdlength:$encqresult\n";
1875: } else {
1876: print $client "error:no_key\n";
1877: }
1878: } else {
1879: print $client "error: ".($!+0)
1880: ." untie(GDBM) Failed ".
1881: "while attempting eget\n";
1882: }
1883: } else {
1884: print $client "error: ".($!+0)
1885: ." tie(GDBM) Failed ".
1886: "while attempting eget\n";
1887: }
1888: } else {
1889: Reply($client, "refused\n", $userinput);
1890:
1891: }
1892: # ------------------------------------------------------------------------- del
1893: } elsif ($userinput =~ /^del/) {
1894: if(isClient) {
1895: my ($cmd,$udom,$uname,$namespace,$what)
1896: =split(/:/,$userinput);
1897: $namespace=~s/\//\_/g;
1898: $namespace=~s/\W//g;
1899: chomp($what);
1900: my $proname=propath($udom,$uname);
1901: my $now=time;
1902: unless ($namespace=~/^nohist\_/) {
1903: my $hfh;
1904: if (
1905: $hfh=IO::File->new(">>$proname/$namespace.hist")
1906: ) { print $hfh "D:$now:$what\n"; }
1907: }
1908: my @keys=split(/\&/,$what);
1909: my %hash;
1910: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1911: foreach my $key (@keys) {
1912: delete($hash{$key});
1913: }
1914: if (untie(%hash)) {
1915: print $client "ok\n";
1916: } else {
1917: print $client "error: ".($!+0)
1918: ." untie(GDBM) Failed ".
1919: "while attempting del\n";
1920: }
1921: } else {
1922: print $client "error: ".($!+0)
1923: ." tie(GDBM) Failed ".
1924: "while attempting del\n";
1925: }
1926: } else {
1927: Reply($client, "refused\n", $userinput);
1928:
1929: }
1930: # ------------------------------------------------------------------------ keys
1931: } elsif ($userinput =~ /^keys/) {
1932: if(isClient) {
1933: my ($cmd,$udom,$uname,$namespace)
1934: =split(/:/,$userinput);
1935: $namespace=~s/\//\_/g;
1936: $namespace=~s/\W//g;
1937: my $proname=propath($udom,$uname);
1938: my $qresult='';
1939: my %hash;
1940: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1941: foreach my $key (keys %hash) {
1942: $qresult.="$key&";
1943: }
1944: if (untie(%hash)) {
1945: $qresult=~s/\&$//;
1946: print $client "$qresult\n";
1947: } else {
1948: print $client "error: ".($!+0)
1949: ." untie(GDBM) Failed ".
1950: "while attempting keys\n";
1951: }
1952: } else {
1953: print $client "error: ".($!+0)
1954: ." tie(GDBM) Failed ".
1955: "while attempting keys\n";
1956: }
1957: } else {
1958: Reply($client, "refused\n", $userinput);
1959:
1960: }
1961: # ----------------------------------------------------------------- dumpcurrent
1962: } elsif ($userinput =~ /^currentdump/) {
1963: if (isClient) {
1964: my ($cmd,$udom,$uname,$namespace)
1965: =split(/:/,$userinput);
1966: $namespace=~s/\//\_/g;
1967: $namespace=~s/\W//g;
1968: my $qresult='';
1969: my $proname=propath($udom,$uname);
1970: my %hash;
1971: if (tie(%hash,'GDBM_File',
1972: "$proname/$namespace.db",
1973: &GDBM_READER(),0640)) {
1974: # Structure of %data:
1975: # $data{$symb}->{$parameter}=$value;
1976: # $data{$symb}->{'v.'.$parameter}=$version;
1977: # since $parameter will be unescaped, we do not
1978: # have to worry about silly parameter names...
1979: my %data = ();
1980: while (my ($key,$value) = each(%hash)) {
1981: my ($v,$symb,$param) = split(/:/,$key);
1982: next if ($v eq 'version' || $symb eq 'keys');
1983: next if (exists($data{$symb}) &&
1984: exists($data{$symb}->{$param}) &&
1985: $data{$symb}->{'v.'.$param} > $v);
1986: $data{$symb}->{$param}=$value;
1987: $data{$symb}->{'v.'.$param}=$v;
1988: }
1989: if (untie(%hash)) {
1990: while (my ($symb,$param_hash) = each(%data)) {
1991: while(my ($param,$value) = each (%$param_hash)){
1992: next if ($param =~ /^v\./);
1993: $qresult.=$symb.':'.$param.'='.$value.'&';
1994: }
1995: }
1996: chop($qresult);
1997: print $client "$qresult\n";
1998: } else {
1999: print $client "error: ".($!+0)
2000: ." untie(GDBM) Failed ".
2001: "while attempting currentdump\n";
2002: }
2003: } else {
2004: print $client "error: ".($!+0)
2005: ." tie(GDBM) Failed ".
2006: "while attempting currentdump\n";
2007: }
2008: } else {
2009: Reply($client, "refused\n", $userinput);
2010: }
2011: # ------------------------------------------------------------------------ dump
2012: } elsif ($userinput =~ /^dump/) {
2013: if(isClient) {
2014: my ($cmd,$udom,$uname,$namespace,$regexp)
2015: =split(/:/,$userinput);
2016: $namespace=~s/\//\_/g;
2017: $namespace=~s/\W//g;
2018: if (defined($regexp)) {
2019: $regexp=&unescape($regexp);
2020: } else {
2021: $regexp='.';
2022: }
2023: my $qresult='';
2024: my $proname=propath($udom,$uname);
2025: my %hash;
2026: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2027: study($regexp);
2028: while (my ($key,$value) = each(%hash)) {
2029: if ($regexp eq '.') {
2030: $qresult.=$key.'='.$value.'&';
2031: } else {
2032: my $unescapeKey = &unescape($key);
2033: if (eval('$unescapeKey=~/$regexp/')) {
2034: $qresult.="$key=$value&";
2035: }
2036: }
2037: }
2038: if (untie(%hash)) {
2039: chop($qresult);
2040: print $client "$qresult\n";
2041: } else {
2042: print $client "error: ".($!+0)
2043: ." untie(GDBM) Failed ".
2044: "while attempting dump\n";
2045: }
2046: } else {
2047: print $client "error: ".($!+0)
2048: ." tie(GDBM) Failed ".
2049: "while attempting dump\n";
2050: }
2051: } else {
2052: Reply($client, "refused\n", $userinput);
2053:
2054: }
2055: # ----------------------------------------------------------------------- store
2056: } elsif ($userinput =~ /^store/) {
2057: if(isClient) {
2058: my ($cmd,$udom,$uname,$namespace,$rid,$what)
2059: =split(/:/,$userinput);
2060: $namespace=~s/\//\_/g;
2061: $namespace=~s/\W//g;
2062: if ($namespace ne 'roles') {
2063: chomp($what);
2064: my $proname=propath($udom,$uname);
2065: my $now=time;
2066: unless ($namespace=~/^nohist\_/) {
2067: my $hfh;
2068: if (
2069: $hfh=IO::File->new(">>$proname/$namespace.hist")
2070: ) { print $hfh "P:$now:$rid:$what\n"; }
2071: }
2072: my @pairs=split(/\&/,$what);
2073: my %hash;
2074: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
2075: my @previouskeys=split(/&/,$hash{"keys:$rid"});
2076: my $key;
2077: $hash{"version:$rid"}++;
2078: my $version=$hash{"version:$rid"};
2079: my $allkeys='';
2080: foreach my $pair (@pairs) {
2081: my ($key,$value)=split(/=/,$pair);
2082: $allkeys.=$key.':';
2083: $hash{"$version:$rid:$key"}=$value;
2084: }
2085: $hash{"$version:$rid:timestamp"}=$now;
2086: $allkeys.='timestamp';
2087: $hash{"$version:keys:$rid"}=$allkeys;
2088: if (untie(%hash)) {
2089: print $client "ok\n";
2090: } else {
2091: print $client "error: ".($!+0)
2092: ." untie(GDBM) Failed ".
2093: "while attempting store\n";
2094: }
2095: } else {
2096: print $client "error: ".($!+0)
2097: ." tie(GDBM) Failed ".
2098: "while attempting store\n";
2099: }
2100: } else {
2101: print $client "refused\n";
2102: }
2103: } else {
2104: Reply($client, "refused\n", $userinput);
2105:
2106: }
2107: # --------------------------------------------------------------------- restore
2108: } elsif ($userinput =~ /^restore/) {
2109: if(isClient) {
2110: my ($cmd,$udom,$uname,$namespace,$rid)
2111: =split(/:/,$userinput);
2112: $namespace=~s/\//\_/g;
2113: $namespace=~s/\W//g;
2114: chomp($rid);
2115: my $proname=propath($udom,$uname);
2116: my $qresult='';
2117: my %hash;
2118: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
2119: my $version=$hash{"version:$rid"};
2120: $qresult.="version=$version&";
2121: my $scope;
2122: for ($scope=1;$scope<=$version;$scope++) {
2123: my $vkeys=$hash{"$scope:keys:$rid"};
2124: my @keys=split(/:/,$vkeys);
2125: my $key;
2126: $qresult.="$scope:keys=$vkeys&";
2127: foreach $key (@keys) {
2128: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
2129: }
2130: }
2131: if (untie(%hash)) {
2132: $qresult=~s/\&$//;
2133: print $client "$qresult\n";
2134: } else {
2135: print $client "error: ".($!+0)
2136: ." untie(GDBM) Failed ".
2137: "while attempting restore\n";
2138: }
2139: } else {
2140: print $client "error: ".($!+0)
2141: ." tie(GDBM) Failed ".
2142: "while attempting restore\n";
2143: }
2144: } else {
2145: Reply($client, "refused\n", $userinput);
2146:
2147: }
2148: # -------------------------------------------------------------------- chatsend
2149: } elsif ($userinput =~ /^chatsend/) {
2150: if(isClient) {
2151: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
2152: &chatadd($cdom,$cnum,$newpost);
2153: print $client "ok\n";
2154: } else {
2155: Reply($client, "refused\n", $userinput);
2156:
2157: }
2158: # -------------------------------------------------------------------- chatretr
2159: } elsif ($userinput =~ /^chatretr/) {
2160: if(isClient) {
2161: my
2162: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
2163: my $reply='';
2164: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
2165: $reply.=&escape($_).':';
2166: }
2167: $reply=~s/\:$//;
2168: print $client $reply."\n";
2169: } else {
2170: Reply($client, "refused\n", $userinput);
2171:
2172: }
2173: # ------------------------------------------------------------------- querysend
2174: } elsif ($userinput =~ /^querysend/) {
2175: if(isClient) {
2176: my ($cmd,$query,
2177: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
2178: $query=~s/\n*$//g;
2179: print $client "".
2180: sqlreply("$clientname\&$query".
2181: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
2182: } else {
2183: Reply($client, "refused\n", $userinput);
2184:
2185: }
2186: # ------------------------------------------------------------------ queryreply
2187: } elsif ($userinput =~ /^queryreply/) {
2188: if(isClient) {
2189: my ($cmd,$id,$reply)=split(/:/,$userinput);
2190: my $store;
2191: my $execdir=$perlvar{'lonDaemons'};
2192: if ($store=IO::File->new(">$execdir/tmp/$id")) {
2193: $reply=~s/\&/\n/g;
2194: print $store $reply;
2195: close $store;
2196: my $store2=IO::File->new(">$execdir/tmp/$id.end");
2197: print $store2 "done\n";
2198: close $store2;
2199: print $client "ok\n";
2200: }
2201: else {
2202: print $client "error: ".($!+0)
2203: ." IO::File->new Failed ".
2204: "while attempting queryreply\n";
2205: }
2206: } else {
2207: Reply($client, "refused\n", $userinput);
2208:
2209: }
2210: # ----------------------------------------------------------------- courseidput
2211: } elsif ($userinput =~ /^courseidput/) {
2212: if(isClient) {
2213: my ($cmd,$udom,$what)=split(/:/,$userinput);
2214: chomp($what);
2215: $udom=~s/\W//g;
2216: my $proname=
2217: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2218: my $now=time;
2219: my @pairs=split(/\&/,$what);
2220: my %hash;
2221: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2222: foreach my $pair (@pairs) {
2223: my ($key,$value)=split(/=/,$pair);
2224: $hash{$key}=$value.':'.$now;
2225: }
2226: if (untie(%hash)) {
2227: print $client "ok\n";
2228: } else {
2229: print $client "error: ".($!+0)
2230: ." untie(GDBM) Failed ".
2231: "while attempting courseidput\n";
2232: }
2233: } else {
2234: print $client "error: ".($!+0)
2235: ." tie(GDBM) Failed ".
2236: "while attempting courseidput\n";
2237: }
2238: } else {
2239: Reply($client, "refused\n", $userinput);
2240:
2241: }
2242: # ---------------------------------------------------------------- courseiddump
2243: } elsif ($userinput =~ /^courseiddump/) {
2244: if(isClient) {
2245: my ($cmd,$udom,$since,$description)
2246: =split(/:/,$userinput);
2247: if (defined($description)) {
2248: $description=&unescape($description);
2249: } else {
2250: $description='.';
2251: }
2252: unless (defined($since)) { $since=0; }
2253: my $qresult='';
2254: my $proname=
2255: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
2256: my %hash;
2257: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2258: while (my ($key,$value) = each(%hash)) {
2259: my ($descr,$lasttime)=split(/\:/,$value);
2260: if ($lasttime<$since) { next; }
2261: if ($description eq '.') {
2262: $qresult.=$key.'='.$descr.'&';
2263: } else {
2264: my $unescapeVal = &unescape($descr);
2265: if (eval('$unescapeVal=~/$description/i')) {
2266: $qresult.="$key=$descr&";
2267: }
2268: }
2269: }
2270: if (untie(%hash)) {
2271: chop($qresult);
2272: print $client "$qresult\n";
2273: } else {
2274: print $client "error: ".($!+0)
2275: ." untie(GDBM) Failed ".
2276: "while attempting courseiddump\n";
2277: }
2278: } else {
2279: print $client "error: ".($!+0)
2280: ." tie(GDBM) Failed ".
2281: "while attempting courseiddump\n";
2282: }
2283: } else {
2284: Reply($client, "refused\n", $userinput);
2285:
2286: }
2287: # ----------------------------------------------------------------------- idput
2288: } elsif ($userinput =~ /^idput/) {
2289: if(isClient) {
2290: my ($cmd,$udom,$what)=split(/:/,$userinput);
2291: chomp($what);
2292: $udom=~s/\W//g;
2293: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2294: my $now=time;
2295: {
2296: my $hfh;
2297: if (
2298: $hfh=IO::File->new(">>$proname.hist")
2299: ) { print $hfh "P:$now:$what\n"; }
2300: }
2301: my @pairs=split(/\&/,$what);
2302: my %hash;
2303: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
2304: foreach my $pair (@pairs) {
2305: my ($key,$value)=split(/=/,$pair);
2306: $hash{$key}=$value;
2307: }
2308: if (untie(%hash)) {
2309: print $client "ok\n";
2310: } else {
2311: print $client "error: ".($!+0)
2312: ." untie(GDBM) Failed ".
2313: "while attempting idput\n";
2314: }
2315: } else {
2316: print $client "error: ".($!+0)
2317: ." tie(GDBM) Failed ".
2318: "while attempting idput\n";
2319: }
2320: } else {
2321: Reply($client, "refused\n", $userinput);
2322:
2323: }
2324: # ----------------------------------------------------------------------- idget
2325: } elsif ($userinput =~ /^idget/) {
2326: if(isClient) {
2327: my ($cmd,$udom,$what)=split(/:/,$userinput);
2328: chomp($what);
2329: $udom=~s/\W//g;
2330: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
2331: my @queries=split(/\&/,$what);
2332: my $qresult='';
2333: my %hash;
2334: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
2335: for (my $i=0;$i<=$#queries;$i++) {
2336: $qresult.="$hash{$queries[$i]}&";
2337: }
2338: if (untie(%hash)) {
2339: $qresult=~s/\&$//;
2340: print $client "$qresult\n";
2341: } else {
2342: print $client "error: ".($!+0)
2343: ." untie(GDBM) Failed ".
2344: "while attempting idget\n";
2345: }
2346: } else {
2347: print $client "error: ".($!+0)
2348: ." tie(GDBM) Failed ".
2349: "while attempting idget\n";
2350: }
2351: } else {
2352: Reply($client, "refused\n", $userinput);
2353:
2354: }
2355: # ---------------------------------------------------------------------- tmpput
2356: } elsif ($userinput =~ /^tmpput/) {
2357: if(isClient) {
2358: my ($cmd,$what)=split(/:/,$userinput);
2359: my $store;
2360: $tmpsnum++;
2361: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
2362: $id=~s/\W/\_/g;
2363: $what=~s/\n//g;
2364: my $execdir=$perlvar{'lonDaemons'};
2365: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
2366: print $store $what;
2367: close $store;
2368: print $client "$id\n";
2369: }
2370: else {
2371: print $client "error: ".($!+0)
2372: ."IO::File->new Failed ".
2373: "while attempting tmpput\n";
2374: }
2375: } else {
2376: Reply($client, "refused\n", $userinput);
2377:
2378: }
2379:
2380: # ---------------------------------------------------------------------- tmpget
2381: } elsif ($userinput =~ /^tmpget/) {
2382: if(isClient) {
2383: my ($cmd,$id)=split(/:/,$userinput);
2384: chomp($id);
2385: $id=~s/\W/\_/g;
2386: my $store;
2387: my $execdir=$perlvar{'lonDaemons'};
2388: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
2389: my $reply=<$store>;
2390: print $client "$reply\n";
2391: close $store;
2392: }
2393: else {
2394: print $client "error: ".($!+0)
2395: ."IO::File->new Failed ".
2396: "while attempting tmpget\n";
2397: }
2398: } else {
2399: Reply($client, "refused\n", $userinput);
2400:
2401: }
2402: # ---------------------------------------------------------------------- tmpdel
2403: } elsif ($userinput =~ /^tmpdel/) {
2404: if(isClient) {
2405: my ($cmd,$id)=split(/:/,$userinput);
2406: chomp($id);
2407: $id=~s/\W/\_/g;
2408: my $execdir=$perlvar{'lonDaemons'};
2409: if (unlink("$execdir/tmp/$id.tmp")) {
2410: print $client "ok\n";
2411: } else {
2412: print $client "error: ".($!+0)
2413: ."Unlink tmp Failed ".
2414: "while attempting tmpdel\n";
2415: }
2416: } else {
2417: Reply($client, "refused\n", $userinput);
2418:
2419: }
2420: # -------------------------------------------------------------------------- ls
2421: } elsif ($userinput =~ /^ls/) {
2422: if(isClient) {
2423: my ($cmd,$ulsdir)=split(/:/,$userinput);
2424: my $ulsout='';
2425: my $ulsfn;
2426: if (-e $ulsdir) {
2427: if(-d $ulsdir) {
2428: if (opendir(LSDIR,$ulsdir)) {
2429: while ($ulsfn=readdir(LSDIR)) {
2430: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
2431: $ulsout.=$ulsfn.'&'.
2432: join('&',@ulsstats).':';
2433: }
2434: closedir(LSDIR);
2435: }
2436: } else {
2437: my @ulsstats=stat($ulsdir);
2438: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
2439: }
2440: } else {
2441: $ulsout='no_such_dir';
2442: }
2443: if ($ulsout eq '') { $ulsout='empty'; }
2444: print $client "$ulsout\n";
2445: } else {
2446: Reply($client, "refused\n", $userinput);
2447:
2448: }
2449: # ----------------------------------------------------------------- setannounce
2450: } elsif ($userinput =~ /^setannounce/) {
2451: if (isClient) {
2452: my ($cmd,$announcement)=split(/:/,$userinput);
2453: chomp($announcement);
2454: $announcement=&unescape($announcement);
2455: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
2456: '/announcement.txt')) {
2457: print $store $announcement;
2458: close $store;
2459: print $client "ok\n";
2460: } else {
2461: print $client "error: ".($!+0)."\n";
2462: }
2463: } else {
2464: Reply($client, "refused\n", $userinput);
2465:
2466: }
2467: # ------------------------------------------------------------------ Hanging up
2468: } elsif (($userinput =~ /^exit/) ||
2469: ($userinput =~ /^init/)) { # no restrictions.
2470: &logthis(
2471: "Client $clientip ($clientname) hanging up: $userinput");
2472: print $client "bye\n";
2473: $client->close();
2474: last;
2475:
2476: # ---------------------------------- set current host/domain
2477: } elsif ($userinput =~ /^sethost:/) {
2478: if (isClient) {
2479: print $client &sethost($userinput)."\n";
2480: } else {
2481: print $client "refused\n";
2482: }
2483: #---------------------------------- request file (?) version.
2484: } elsif ($userinput =~/^version:/) {
2485: if (isClient) {
2486: print $client &version($userinput)."\n";
2487: } else {
2488: print $client "refused\n";
2489: }
2490: # ------------------------------------------------------------- unknown command
2491:
2492: } else {
2493: # unknown command
2494: print $client "unknown_cmd\n";
2495: }
2496: # -------------------------------------------------------------------- complete
2497: alarm(0);
2498: &status('Listening to '.$clientname);
2499: }
2500: # --------------------------------------------- client unknown or fishy, refuse
2501: } else {
2502: print $client "refused\n";
2503: $client->close();
2504: &logthis("<font color=blue>WARNING: "
2505: ."Rejected client $clientip, closing connection</font>");
2506: }
2507: }
2508:
2509: # =============================================================================
2510:
2511: &logthis("<font color=red>CRITICAL: "
2512: ."Disconnect from $clientip ($clientname)</font>");
2513:
2514:
2515: # this exit is VERY important, otherwise the child will become
2516: # a producer of more and more children, forking yourself into
2517: # process death.
2518: exit;
2519:
2520: }
2521:
2522:
2523: #
2524: # Checks to see if the input roleput request was to set
2525: # an author role. If so, invokes the lchtmldir script to set
2526: # up a correct public_html
2527: # Parameters:
2528: # request - The request sent to the rolesput subchunk.
2529: # We're looking for /domain/_au
2530: # domain - The domain in which the user is having roles doctored.
2531: # user - Name of the user for which the role is being put.
2532: # authtype - The authentication type associated with the user.
2533: #
2534: sub ManagePermissions
2535: {
2536: my $request = shift;
2537: my $domain = shift;
2538: my $user = shift;
2539: my $authtype= shift;
2540:
2541: # See if the request is of the form /$domain/_au
2542: &logthis("ruequest is $request");
2543: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
2544: my $execdir = $perlvar{'lonDaemons'};
2545: my $userhome= "/home/$user" ;
2546: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
2547: system("$execdir/lchtmldir $userhome $user $authtype");
2548: }
2549: }
2550: #
2551: # GetAuthType - Determines the authorization type of a user in a domain.
2552:
2553: # Returns the authorization type or nouser if there is no such user.
2554: #
2555: sub GetAuthType
2556: {
2557: my $domain = shift;
2558: my $user = shift;
2559:
2560: Debug("GetAuthType( $domain, $user ) \n");
2561: my $proname = &propath($domain, $user);
2562: my $passwdfile = "$proname/passwd";
2563: if( -e $passwdfile ) {
2564: my $pf = IO::File->new($passwdfile);
2565: my $realpassword = <$pf>;
2566: chomp($realpassword);
2567: Debug("Password info = $realpassword\n");
2568: my ($authtype, $contentpwd) = split(/:/, $realpassword);
2569: Debug("Authtype = $authtype, content = $contentpwd\n");
2570: my $availinfo = '';
2571: if($authtype eq 'krb4' or $authtype eq 'krb5') {
2572: $availinfo = $contentpwd;
2573: }
2574:
2575: return "$authtype:$availinfo";
2576: }
2577: else {
2578: Debug("Returning nouser");
2579: return "nouser";
2580: }
2581: }
2582:
2583: sub addline {
2584: my ($fname,$hostid,$ip,$newline)=@_;
2585: my $contents;
2586: my $found=0;
2587: my $expr='^'.$hostid.':'.$ip.':';
2588: $expr =~ s/\./\\\./g;
2589: my $sh;
2590: if ($sh=IO::File->new("$fname.subscription")) {
2591: while (my $subline=<$sh>) {
2592: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
2593: }
2594: $sh->close();
2595: }
2596: $sh=IO::File->new(">$fname.subscription");
2597: if ($contents) { print $sh $contents; }
2598: if ($newline) { print $sh $newline; }
2599: $sh->close();
2600: return $found;
2601: }
2602:
2603: sub getchat {
2604: my ($cdom,$cname,$udom,$uname)=@_;
2605: my %hash;
2606: my $proname=&propath($cdom,$cname);
2607: my @entries=();
2608: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2609: &GDBM_READER(),0640)) {
2610: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2611: untie %hash;
2612: }
2613: my @participants=();
2614: my $cutoff=time-60;
2615: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
2616: &GDBM_WRCREAT(),0640)) {
2617: $hash{$uname.':'.$udom}=time;
2618: foreach (sort keys %hash) {
2619: if ($hash{$_}>$cutoff) {
2620: $participants[$#participants+1]='active_participant:'.$_;
2621: }
2622: }
2623: untie %hash;
2624: }
2625: return (@participants,@entries);
2626: }
2627:
2628: sub chatadd {
2629: my ($cdom,$cname,$newchat)=@_;
2630: my %hash;
2631: my $proname=&propath($cdom,$cname);
2632: my @entries=();
2633: my $time=time;
2634: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2635: &GDBM_WRCREAT(),0640)) {
2636: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2637: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
2638: my ($thentime,$idnum)=split(/\_/,$lastid);
2639: my $newid=$time.'_000000';
2640: if ($thentime==$time) {
2641: $idnum=~s/^0+//;
2642: $idnum++;
2643: $idnum=substr('000000'.$idnum,-6,6);
2644: $newid=$time.'_'.$idnum;
2645: }
2646: $hash{$newid}=$newchat;
2647: my $expired=$time-3600;
2648: foreach (keys %hash) {
2649: my ($thistime)=($_=~/(\d+)\_/);
2650: if ($thistime<$expired) {
2651: delete $hash{$_};
2652: }
2653: }
2654: untie %hash;
2655: }
2656: {
2657: my $hfh;
2658: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
2659: print $hfh "$time:".&unescape($newchat)."\n";
2660: }
2661: }
2662: }
2663:
2664: sub unsub {
2665: my ($fname,$clientip)=@_;
2666: my $result;
2667: if (unlink("$fname.$clientname")) {
2668: $result="ok\n";
2669: } else {
2670: $result="not_subscribed\n";
2671: }
2672: if (-e "$fname.subscription") {
2673: my $found=&addline($fname,$clientname,$clientip,'');
2674: if ($found) { $result="ok\n"; }
2675: } else {
2676: if ($result != "ok\n") { $result="not_subscribed\n"; }
2677: }
2678: return $result;
2679: }
2680:
2681: sub currentversion {
2682: my $fname=shift;
2683: my $version=-1;
2684: my $ulsdir='';
2685: if ($fname=~/^(.+)\/[^\/]+$/) {
2686: $ulsdir=$1;
2687: }
2688: my ($fnamere1,$fnamere2);
2689: # remove version if already specified
2690: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
2691: # get the bits that go before and after the version number
2692: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
2693: $fnamere1=$1;
2694: $fnamere2='.'.$2;
2695: }
2696: if (-e $fname) { $version=1; }
2697: if (-e $ulsdir) {
2698: if(-d $ulsdir) {
2699: if (opendir(LSDIR,$ulsdir)) {
2700: my $ulsfn;
2701: while ($ulsfn=readdir(LSDIR)) {
2702: # see if this is a regular file (ignore links produced earlier)
2703: my $thisfile=$ulsdir.'/'.$ulsfn;
2704: unless (-l $thisfile) {
2705: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
2706: if ($1>$version) { $version=$1; }
2707: }
2708: }
2709: }
2710: closedir(LSDIR);
2711: $version++;
2712: }
2713: }
2714: }
2715: return $version;
2716: }
2717:
2718: sub thisversion {
2719: my $fname=shift;
2720: my $version=-1;
2721: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
2722: $version=$1;
2723: }
2724: return $version;
2725: }
2726:
2727: sub subscribe {
2728: my ($userinput,$clientip)=@_;
2729: my $result;
2730: my ($cmd,$fname)=split(/:/,$userinput);
2731: my $ownership=&ishome($fname);
2732: if ($ownership eq 'owner') {
2733: # explitly asking for the current version?
2734: unless (-e $fname) {
2735: my $currentversion=¤tversion($fname);
2736: if (&thisversion($fname)==$currentversion) {
2737: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
2738: my $root=$1;
2739: my $extension=$2;
2740: symlink($root.'.'.$extension,
2741: $root.'.'.$currentversion.'.'.$extension);
2742: unless ($extension=~/\.meta$/) {
2743: symlink($root.'.'.$extension.'.meta',
2744: $root.'.'.$currentversion.'.'.$extension.'.meta');
2745: }
2746: }
2747: }
2748: }
2749: if (-e $fname) {
2750: if (-d $fname) {
2751: $result="directory\n";
2752: } else {
2753: if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
2754: my $now=time;
2755: my $found=&addline($fname,$clientname,$clientip,
2756: "$clientname:$clientip:$now\n");
2757: if ($found) { $result="$fname\n"; }
2758: # if they were subscribed to only meta data, delete that
2759: # subscription, when you subscribe to a file you also get
2760: # the metadata
2761: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
2762: $fname=~s/\/home\/httpd\/html\/res/raw/;
2763: $fname="http://$thisserver/".$fname;
2764: $result="$fname\n";
2765: }
2766: } else {
2767: $result="not_found\n";
2768: }
2769: } else {
2770: $result="rejected\n";
2771: }
2772: return $result;
2773: }
2774:
2775: sub make_passwd_file {
2776: my ($uname, $umode,$npass,$passfilename)=@_;
2777: my $result="ok\n";
2778: if ($umode eq 'krb4' or $umode eq 'krb5') {
2779: {
2780: my $pf = IO::File->new(">$passfilename");
2781: print $pf "$umode:$npass\n";
2782: }
2783: } elsif ($umode eq 'internal') {
2784: my $salt=time;
2785: $salt=substr($salt,6,2);
2786: my $ncpass=crypt($npass,$salt);
2787: {
2788: &Debug("Creating internal auth");
2789: my $pf = IO::File->new(">$passfilename");
2790: print $pf "internal:$ncpass\n";
2791: }
2792: } elsif ($umode eq 'localauth') {
2793: {
2794: my $pf = IO::File->new(">$passfilename");
2795: print $pf "localauth:$npass\n";
2796: }
2797: } elsif ($umode eq 'unix') {
2798: {
2799: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
2800: {
2801: &Debug("Executing external: ".$execpath);
2802: &Debug("user = ".$uname.", Password =". $npass);
2803: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
2804: print $se "$uname\n";
2805: print $se "$npass\n";
2806: print $se "$npass\n";
2807: }
2808: my $useraddok = $?;
2809: if($useraddok > 0) {
2810: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
2811: }
2812: my $pf = IO::File->new(">$passfilename");
2813: print $pf "unix:\n";
2814: }
2815: } elsif ($umode eq 'none') {
2816: {
2817: my $pf = IO::File->new(">$passfilename");
2818: print $pf "none:\n";
2819: }
2820: } else {
2821: $result="auth_mode_error\n";
2822: }
2823: return $result;
2824: }
2825:
2826: sub sethost {
2827: my ($remotereq) = @_;
2828: my (undef,$hostid)=split(/:/,$remotereq);
2829: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
2830: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
2831: $currenthostid=$hostid;
2832: $currentdomainid=$hostdom{$hostid};
2833: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
2834: } else {
2835: &logthis("Requested host id $hostid not an alias of ".
2836: $perlvar{'lonHostID'}." refusing connection");
2837: return 'unable_to_set';
2838: }
2839: return 'ok';
2840: }
2841:
2842: sub version {
2843: my ($userinput)=@_;
2844: $remoteVERSION=(split(/:/,$userinput))[1];
2845: return "version:$VERSION";
2846: }
2847:
2848: #There is a copy of this in lonnet.pm
2849: sub userload {
2850: my $numusers=0;
2851: {
2852: opendir(LONIDS,$perlvar{'lonIDsDir'});
2853: my $filename;
2854: my $curtime=time;
2855: while ($filename=readdir(LONIDS)) {
2856: if ($filename eq '.' || $filename eq '..') {next;}
2857: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
2858: if ($curtime-$mtime < 1800) { $numusers++; }
2859: }
2860: closedir(LONIDS);
2861: }
2862: my $userloadpercent=0;
2863: my $maxuserload=$perlvar{'lonUserLoadLim'};
2864: if ($maxuserload) {
2865: $userloadpercent=100*$numusers/$maxuserload;
2866: }
2867: $userloadpercent=sprintf("%.2f",$userloadpercent);
2868: return $userloadpercent;
2869: }
2870:
2871: # ----------------------------------- POD (plain old documentation, CPAN style)
2872:
2873: =head1 NAME
2874:
2875: lond - "LON Daemon" Server (port "LOND" 5663)
2876:
2877: =head1 SYNOPSIS
2878:
2879: Usage: B<lond>
2880:
2881: Should only be run as user=www. This is a command-line script which
2882: is invoked by B<loncron>. There is no expectation that a typical user
2883: will manually start B<lond> from the command-line. (In other words,
2884: DO NOT START B<lond> YOURSELF.)
2885:
2886: =head1 DESCRIPTION
2887:
2888: There are two characteristics associated with the running of B<lond>,
2889: PROCESS MANAGEMENT (starting, stopping, handling child processes)
2890: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
2891: subscriptions, etc). These are described in two large
2892: sections below.
2893:
2894: B<PROCESS MANAGEMENT>
2895:
2896: Preforker - server who forks first. Runs as a daemon. HUPs.
2897: Uses IDEA encryption
2898:
2899: B<lond> forks off children processes that correspond to the other servers
2900: in the network. Management of these processes can be done at the
2901: parent process level or the child process level.
2902:
2903: B<logs/lond.log> is the location of log messages.
2904:
2905: The process management is now explained in terms of linux shell commands,
2906: subroutines internal to this code, and signal assignments:
2907:
2908: =over 4
2909:
2910: =item *
2911:
2912: PID is stored in B<logs/lond.pid>
2913:
2914: This is the process id number of the parent B<lond> process.
2915:
2916: =item *
2917:
2918: SIGTERM and SIGINT
2919:
2920: Parent signal assignment:
2921: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
2922:
2923: Child signal assignment:
2924: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
2925: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
2926: to restart a new child.)
2927:
2928: Command-line invocations:
2929: B<kill> B<-s> SIGTERM I<PID>
2930: B<kill> B<-s> SIGINT I<PID>
2931:
2932: Subroutine B<HUNTSMAN>:
2933: This is only invoked for the B<lond> parent I<PID>.
2934: This kills all the children, and then the parent.
2935: The B<lonc.pid> file is cleared.
2936:
2937: =item *
2938:
2939: SIGHUP
2940:
2941: Current bug:
2942: This signal can only be processed the first time
2943: on the parent process. Subsequent SIGHUP signals
2944: have no effect.
2945:
2946: Parent signal assignment:
2947: $SIG{HUP} = \&HUPSMAN;
2948:
2949: Child signal assignment:
2950: none (nothing happens)
2951:
2952: Command-line invocations:
2953: B<kill> B<-s> SIGHUP I<PID>
2954:
2955: Subroutine B<HUPSMAN>:
2956: This is only invoked for the B<lond> parent I<PID>,
2957: This kills all the children, and then the parent.
2958: The B<lond.pid> file is cleared.
2959:
2960: =item *
2961:
2962: SIGUSR1
2963:
2964: Parent signal assignment:
2965: $SIG{USR1} = \&USRMAN;
2966:
2967: Child signal assignment:
2968: $SIG{USR1}= \&logstatus;
2969:
2970: Command-line invocations:
2971: B<kill> B<-s> SIGUSR1 I<PID>
2972:
2973: Subroutine B<USRMAN>:
2974: When invoked for the B<lond> parent I<PID>,
2975: SIGUSR1 is sent to all the children, and the status of
2976: each connection is logged.
2977:
2978: =item *
2979:
2980: SIGUSR2
2981:
2982: Parent Signal assignment:
2983: $SIG{USR2} = \&UpdateHosts
2984:
2985: Child signal assignment:
2986: NONE
2987:
2988:
2989: =item *
2990:
2991: SIGCHLD
2992:
2993: Parent signal assignment:
2994: $SIG{CHLD} = \&REAPER;
2995:
2996: Child signal assignment:
2997: none
2998:
2999: Command-line invocations:
3000: B<kill> B<-s> SIGCHLD I<PID>
3001:
3002: Subroutine B<REAPER>:
3003: This is only invoked for the B<lond> parent I<PID>.
3004: Information pertaining to the child is removed.
3005: The socket port is cleaned up.
3006:
3007: =back
3008:
3009: B<SERVER-SIDE ACTIVITIES>
3010:
3011: Server-side information can be accepted in an encrypted or non-encrypted
3012: method.
3013:
3014: =over 4
3015:
3016: =item ping
3017:
3018: Query a client in the hosts.tab table; "Are you there?"
3019:
3020: =item pong
3021:
3022: Respond to a ping query.
3023:
3024: =item ekey
3025:
3026: Read in encrypted key, make cipher. Respond with a buildkey.
3027:
3028: =item load
3029:
3030: Respond with CPU load based on a computation upon /proc/loadavg.
3031:
3032: =item currentauth
3033:
3034: Reply with current authentication information (only over an
3035: encrypted channel).
3036:
3037: =item auth
3038:
3039: Only over an encrypted channel, reply as to whether a user's
3040: authentication information can be validated.
3041:
3042: =item passwd
3043:
3044: Allow for a password to be set.
3045:
3046: =item makeuser
3047:
3048: Make a user.
3049:
3050: =item passwd
3051:
3052: Allow for authentication mechanism and password to be changed.
3053:
3054: =item home
3055:
3056: Respond to a question "are you the home for a given user?"
3057:
3058: =item update
3059:
3060: Update contents of a subscribed resource.
3061:
3062: =item unsubscribe
3063:
3064: The server is unsubscribing from a resource.
3065:
3066: =item subscribe
3067:
3068: The server is subscribing to a resource.
3069:
3070: =item log
3071:
3072: Place in B<logs/lond.log>
3073:
3074: =item put
3075:
3076: stores hash in namespace
3077:
3078: =item rolesput
3079:
3080: put a role into a user's environment
3081:
3082: =item get
3083:
3084: returns hash with keys from array
3085: reference filled in from namespace
3086:
3087: =item eget
3088:
3089: returns hash with keys from array
3090: reference filled in from namesp (encrypts the return communication)
3091:
3092: =item rolesget
3093:
3094: get a role from a user's environment
3095:
3096: =item del
3097:
3098: deletes keys out of array from namespace
3099:
3100: =item keys
3101:
3102: returns namespace keys
3103:
3104: =item dump
3105:
3106: dumps the complete (or key matching regexp) namespace into a hash
3107:
3108: =item store
3109:
3110: stores hash permanently
3111: for this url; hashref needs to be given and should be a \%hashname; the
3112: remaining args aren't required and if they aren't passed or are '' they will
3113: be derived from the ENV
3114:
3115: =item restore
3116:
3117: returns a hash for a given url
3118:
3119: =item querysend
3120:
3121: Tells client about the lonsql process that has been launched in response
3122: to a sent query.
3123:
3124: =item queryreply
3125:
3126: Accept information from lonsql and make appropriate storage in temporary
3127: file space.
3128:
3129: =item idput
3130:
3131: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
3132: for each student, defined perhaps by the institutional Registrar.)
3133:
3134: =item idget
3135:
3136: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
3137: for each student, defined perhaps by the institutional Registrar.)
3138:
3139: =item tmpput
3140:
3141: Accept and store information in temporary space.
3142:
3143: =item tmpget
3144:
3145: Send along temporarily stored information.
3146:
3147: =item ls
3148:
3149: List part of a user's directory.
3150:
3151: =item pushtable
3152:
3153: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
3154: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
3155: must be restored manually in case of a problem with the new table file.
3156: pushtable requires that the request be encrypted and validated via
3157: ValidateManager. The form of the command is:
3158: enc:pushtable tablename <tablecontents> \n
3159: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
3160: cleartext newline.
3161:
3162: =item Hanging up (exit or init)
3163:
3164: What to do when a client tells the server that they (the client)
3165: are leaving the network.
3166:
3167: =item unknown command
3168:
3169: If B<lond> is sent an unknown command (not in the list above),
3170: it replys to the client "unknown_cmd".
3171:
3172:
3173: =item UNKNOWN CLIENT
3174:
3175: If the anti-spoofing algorithm cannot verify the client,
3176: the client is rejected (with a "refused" message sent
3177: to the client, and the connection is closed.
3178:
3179: =back
3180:
3181: =head1 PREREQUISITES
3182:
3183: IO::Socket
3184: IO::File
3185: Apache::File
3186: Symbol
3187: POSIX
3188: Crypt::IDEA
3189: LWP::UserAgent()
3190: GDBM_File
3191: Authen::Krb4
3192: Authen::Krb5
3193:
3194: =head1 COREQUISITES
3195:
3196: =head1 OSNAMES
3197:
3198: linux
3199:
3200: =head1 SCRIPT CATEGORIES
3201:
3202: Server/Process
3203:
3204: =cut
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