1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.143 2003/09/15 10:03:52 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: # http://www.lon-capa.org/
28: #
29: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
30: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
31: # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
32: # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
33: # 03/07,05/31 Gerd Kortemeyer
34: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
35: # 12/05,12/13,12/29 Gerd Kortemeyer
36: # YEAR=2001
37: # 02/12 Gerd Kortemeyer
38: # 03/24 Gerd Kortemeyer
39: # 05/11,05/28,08/30 Gerd Kortemeyer
40: # 11/26,11/27 Gerd Kortemeyer
41: # 12/22 Gerd Kortemeyer
42: # YEAR=2002
43: # 01/20/02,02/05 Gerd Kortemeyer
44: # 02/05 Guy Albertelli
45: # 02/12 Gerd Kortemeyer
46: # 02/19 Matthew Hall
47: # 02/25 Gerd Kortemeyer
48: # 01/xx/2003 Ron Fox.. Remove preforking. This makes the general daemon
49: # logic simpler (and there were problems maintaining the preforked
50: # population). Since the time averaged connection rate is close to zero
51: # because lonc's purpose is to maintain near continuous connnections,
52: # preforking is not really needed.
53: # 08/xx/2003 Ron Fox: Add management requests. Management requests
54: # will be validated via a call to ValidateManager. At present, this
55: # is done by simple host verification. In the future we can modify
56: # this function to do a certificate check.
57: # Management functions supported include:
58: # - pushing /home/httpd/lonTabs/hosts.tab
59: # - pushing /home/httpd/lonTabs/domain.tab
60: # 09/08/2003 Ron Fox: Told lond to take care of change logging so we
61: # don't have to remember it:
62: # $Log: lond,v $
63: # Revision 1.143 2003/09/15 10:03:52 foxr
64: # Completed and tested code for pushfile.
65: #
66: # Revision 1.142 2003/09/09 20:47:46 www
67: # Permanently store chatroom entries in chatroom.log
68: #
69: # Revision 1.141 2003/09/08 10:32:07 foxr
70: # Added PushFile sub This sub oversees the push of a new configuration table file
71: # Currently supported files are:
72: # - hosts.tab (transaction pushfile:hosts:contents)
73: # - domain.tab (transaction pushfile:domain:contents)
74: #
75:
76:
77: use strict;
78: use lib '/home/httpd/lib/perl/';
79: use LONCAPA::Configuration;
80:
81: use IO::Socket;
82: use IO::File;
83: #use Apache::File;
84: use Symbol;
85: use POSIX;
86: use Crypt::IDEA;
87: use LWP::UserAgent();
88: use GDBM_File;
89: use Authen::Krb4;
90: use Authen::Krb5;
91: use lib '/home/httpd/lib/perl/';
92: use localauth;
93: use File::Copy;
94:
95: my $DEBUG = 0; # Non zero to enable debug log entries.
96:
97: my $status='';
98: my $lastlog='';
99:
100: my $VERSION='$Revision: 1.143 $'; #' stupid emacs
101: my $remoteVERSION;
102: my $currenthostid;
103: my $currentdomainid;
104:
105: my $client;
106: my $clientip;
107:
108: my $server;
109: my $thisserver;
110:
111: my %hostid;
112: my %hostdom;
113: my %hostip;
114: my %perlvar; # Will have the apache conf defined perl vars.
115:
116: #
117: # The array below are password error strings."
118: #
119: my $lastpwderror = 13; # Largest error number from lcpasswd.
120: my @passwderrors = ("ok",
121: "lcpasswd must be run as user 'www'",
122: "lcpasswd got incorrect number of arguments",
123: "lcpasswd did not get the right nubmer of input text lines",
124: "lcpasswd too many simultaneous pwd changes in progress",
125: "lcpasswd User does not exist.",
126: "lcpasswd Incorrect current passwd",
127: "lcpasswd Unable to su to root.",
128: "lcpasswd Cannot set new passwd.",
129: "lcpasswd Username has invalid characters",
130: "lcpasswd Invalid characters in password",
131: "11", "12",
132: "lcpasswd Password mismatch");
133:
134:
135: # The array below are lcuseradd error strings.:
136:
137: my $lastadderror = 13;
138: my @adderrors = ("ok",
139: "User ID mismatch, lcuseradd must run as user www",
140: "lcuseradd Incorrect number of command line parameters must be 3",
141: "lcuseradd Incorrect number of stdinput lines, must be 3",
142: "lcuseradd Too many other simultaneous pwd changes in progress",
143: "lcuseradd User does not exist",
144: "lcuseradd Unabel to mak ewww member of users's group",
145: "lcuseradd Unable to su to root",
146: "lcuseradd Unable to set password",
147: "lcuseradd Usrname has invbalid charcters",
148: "lcuseradd Password has an invalid character",
149: "lcuseradd User already exists",
150: "lcuseradd Could not add user.",
151: "lcuseradd Password mismatch");
152:
153:
154: #
155: # GetCertificate: Given a transaction that requires a certificate,
156: # this function will extract the certificate from the transaction
157: # request. Note that at this point, the only concept of a certificate
158: # is the hostname to which we are connected.
159: #
160: # Parameter:
161: # request - The request sent by our client (this parameterization may
162: # need to change when we really use a certificate granting
163: # authority.
164: #
165: sub GetCertificate {
166: my $request = shift;
167:
168: return $clientip;
169: }
170:
171:
172: #
173: # ValidManager: Determines if a given certificate represents a valid manager.
174: # in this primitive implementation, the 'certificate' is
175: # just the connecting loncapa client name. This is checked
176: # against a valid client list in the configuration.
177: #
178: #
179: sub ValidManager {
180: my $certificate = shift;
181:
182: my $hostentry = $hostid{$certificate};
183: if ($hostentry ne undef) {
184: &logthis('<font color="yellow">Authenticating manager'.
185: " $hostentry</font>");
186: return 1;
187: } else {
188: &logthis('<font color="red"> Failed manager authentication '.
189: "$certificate </font>");
190: }
191: }
192: #
193: # CopyFile: Called as part of the process of installing a
194: # new configuration file. This function copies an existing
195: # file to a backup file.
196: # Parameters:
197: # oldfile - Name of the file to backup.
198: # newfile - Name of the backup file.
199: # Return:
200: # 0 - Failure (errno has failure reason).
201: # 1 - Success.
202: #
203: sub CopyFile {
204: my $oldfile = shift;
205: my $newfile = shift;
206:
207: # The file must exist:
208:
209: if(-e $oldfile) {
210:
211: # Read the old file.
212:
213: my $oldfh = IO::File->new("< $oldfile");
214: if(!$oldfh) {
215: return 0;
216: }
217: my @contents = <$oldfh>; # Suck in the entire file.
218:
219: # write the backup file:
220:
221: my $newfh = IO::File->new("> $newfile");
222: if(!(defined $newfh)){
223: return 0;
224: }
225: my $lines = scalar @contents;
226: for (my $i =0; $i < $lines; $i++) {
227: print $newfh ($contents[$i]);
228: }
229:
230: $oldfh->close;
231: $newfh->close;
232:
233: chmod(0660, $newfile);
234:
235: return 1;
236:
237: } else {
238: return 0;
239: }
240: }
241:
242: #
243: # InstallFile: Called to install an administrative file:
244: # - The file is created with <name>.tmp
245: # - The <name>.tmp file is then mv'd to <name>
246: # This lugubrious procedure is done to ensure that we are never without
247: # a valid, even if dated, version of the file regardless of who crashes
248: # and when the crash occurs.
249: #
250: # Parameters:
251: # Name of the file
252: # File Contents.
253: # Return:
254: # nonzero - success.
255: # 0 - failure and $! has an errno.
256: #
257: sub InstallFile {
258: my $Filename = shift;
259: my $Contents = shift;
260: my $TempFile = $Filename.".tmp";
261:
262: # Open the file for write:
263:
264: my $fh = IO::File->new("> $TempFile"); # Write to temp.
265: if(!(defined $fh)) {
266: &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
267: return 0;
268: }
269: # write the contents of the file:
270:
271: print $fh ($Contents);
272: $fh->close; # In case we ever have a filesystem w. locking
273:
274: chmod(0660, $TempFile);
275:
276: # Now we can move install the file in position.
277:
278: move($TempFile, $Filename);
279:
280: return 1;
281: }
282:
283: #
284: # PushFile: Called to do an administrative push of a file.
285: # - Ensure the file being pushed is one we support.
286: # - Backup the old file to <filename.saved>
287: # - Separate the contents of the new file out from the
288: # rest of the request.
289: # - Write the new file.
290: # Parameter:
291: # Request - The entire user request. This consists of a : separated
292: # string pushfile:tablename:contents.
293: # NOTE: The contents may have :'s in it as well making things a bit
294: # more interesting... but not much.
295: # Returns:
296: # String to send to client ("ok" or "refused" if bad file).
297: #
298: sub PushFile {
299: my $request = shift;
300: my ($command, $filename, $contents) = split(":", $request, 3);
301:
302: # At this point in time, pushes for only the following tables are
303: # supported:
304: # hosts.tab ($filename eq host).
305: # domain.tab ($filename eq domain).
306: # Construct the destination filename or reject the request.
307: #
308: # lonManage is supposed to ensure this, however this session could be
309: # part of some elaborate spoof that managed somehow to authenticate.
310: #
311:
312: my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
313: if ($filename eq "host") {
314: $tablefile .= "hosts.tab";
315: } elsif ($filename eq "domain") {
316: $tablefile .= "domain.tab";
317: } else {
318: return "refused";
319: }
320: #
321: # >copy< the old table to the backup table
322: # don't rename in case system crashes/reboots etc. in the time
323: # window between a rename and write.
324: #
325: my $backupfile = $tablefile;
326: $backupfile =~ s/\.tab$/.old/;
327: if(!CopyFile($tablefile, $backupfile)) {
328: &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
329: return "error:$!";
330: }
331: &logthis('<font color="green"> Pushfile: backed up '
332: .$tablefile." to $backupfile</font>");
333:
334: # Install the new file:
335:
336: if(!InstallFile($tablefile, $contents)) {
337: &logthis('<font color="red"> Pushfile: unable to install '
338: .$tablefile." $! </font>");
339: return "error:$!";
340: }
341: else {
342: &logthis('<font color="green"> Installed new '.$tablefile
343: ."</font>");
344:
345: }
346:
347:
348: # Indicate success:
349:
350: return "ok";
351:
352: }
353: #
354: # Convert an error return code from lcpasswd to a string value.
355: #
356: sub lcpasswdstrerror {
357: my $ErrorCode = shift;
358: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
359: return "lcpasswd Unrecognized error return value ".$ErrorCode;
360: } else {
361: return $passwderrors[$ErrorCode];
362: }
363: }
364:
365: #
366: # Convert an error return code from lcuseradd to a string value:
367: #
368: sub lcuseraddstrerror {
369: my $ErrorCode = shift;
370: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
371: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
372: } else {
373: return $adderrors[$ErrorCode];
374: }
375: }
376:
377: # grabs exception and records it to log before exiting
378: sub catchexception {
379: my ($error)=@_;
380: $SIG{'QUIT'}='DEFAULT';
381: $SIG{__DIE__}='DEFAULT';
382: &logthis("<font color=red>CRITICAL: "
383: ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
384: ."a crash with this error msg->[$error]</font>");
385: &logthis('Famous last words: '.$status.' - '.$lastlog);
386: if ($client) { print $client "error: $error\n"; }
387: $server->close();
388: die($error);
389: }
390:
391: sub timeout {
392: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
393: &catchexception('Timeout');
394: }
395: # -------------------------------- Set signal handlers to record abnormal exits
396:
397: $SIG{'QUIT'}=\&catchexception;
398: $SIG{__DIE__}=\&catchexception;
399:
400: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
401: &status("Read loncapa.conf and loncapa_apache.conf");
402: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
403: %perlvar=%{$perlvarref};
404: undef $perlvarref;
405:
406: # ----------------------------- Make sure this process is running from user=www
407: my $wwwid=getpwnam('www');
408: if ($wwwid!=$<) {
409: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
410: my $subj="LON: $currenthostid User ID mismatch";
411: system("echo 'User ID mismatch. lond must be run as user www.' |\
412: mailto $emailto -s '$subj' > /dev/null");
413: exit 1;
414: }
415:
416: # --------------------------------------------- Check if other instance running
417:
418: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
419:
420: if (-e $pidfile) {
421: my $lfh=IO::File->new("$pidfile");
422: my $pide=<$lfh>;
423: chomp($pide);
424: if (kill 0 => $pide) { die "already running"; }
425: }
426:
427: # ------------------------------------------------------------- Read hosts file
428:
429: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
430:
431: while (my $configline=<CONFIG>) {
432: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
433: chomp($ip); $ip=~s/\D+$//;
434: $hostid{$ip}=$id;
435: $hostdom{$id}=$domain;
436: $hostip{$id}=$ip;
437: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
438: }
439: close(CONFIG);
440:
441: # establish SERVER socket, bind and listen.
442: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
443: Type => SOCK_STREAM,
444: Proto => 'tcp',
445: Reuse => 1,
446: Listen => 10 )
447: or die "making socket: $@\n";
448:
449: # --------------------------------------------------------- Do global variables
450:
451: # global variables
452:
453: my %children = (); # keys are current child process IDs
454: my $children = 0; # current number of children
455:
456: sub REAPER { # takes care of dead children
457: $SIG{CHLD} = \&REAPER;
458: my $pid = wait;
459: if (defined($children{$pid})) {
460: &logthis("Child $pid died");
461: $children --;
462: delete $children{$pid};
463: } else {
464: &logthis("Unknown Child $pid died");
465: }
466: }
467:
468: sub HUNTSMAN { # signal handler for SIGINT
469: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
470: kill 'INT' => keys %children;
471: &logthis("Free socket: ".shutdown($server,2)); # free up socket
472: my $execdir=$perlvar{'lonDaemons'};
473: unlink("$execdir/logs/lond.pid");
474: &logthis("<font color=red>CRITICAL: Shutting down</font>");
475: exit; # clean up with dignity
476: }
477:
478: sub HUPSMAN { # signal handler for SIGHUP
479: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
480: kill 'INT' => keys %children;
481: &logthis("Free socket: ".shutdown($server,2)); # free up socket
482: &logthis("<font color=red>CRITICAL: Restarting</font>");
483: my $execdir=$perlvar{'lonDaemons'};
484: unlink("$execdir/logs/lond.pid");
485: exec("$execdir/lond"); # here we go again
486: }
487:
488: sub checkchildren {
489: &initnewstatus();
490: &logstatus();
491: &logthis('Going to check on the children');
492: my $docdir=$perlvar{'lonDocRoot'};
493: foreach (sort keys %children) {
494: sleep 1;
495: unless (kill 'USR1' => $_) {
496: &logthis ('Child '.$_.' is dead');
497: &logstatus($$.' is dead');
498: }
499: }
500: sleep 5;
501: $SIG{ALRM} = sub { die "timeout" };
502: $SIG{__DIE__} = 'DEFAULT';
503: foreach (sort keys %children) {
504: unless (-e "$docdir/lon-status/londchld/$_.txt") {
505: eval {
506: alarm(300);
507: &logthis('Child '.$_.' did not respond');
508: kill 9 => $_;
509: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
510: #$subj="LON: $currenthostid killed lond process $_";
511: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
512: #$execdir=$perlvar{'lonDaemons'};
513: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
514: alarm(0);
515: }
516: }
517: }
518: $SIG{ALRM} = 'DEFAULT';
519: $SIG{__DIE__} = \&cathcexception;
520: }
521:
522: # --------------------------------------------------------------------- Logging
523:
524: sub logthis {
525: my $message=shift;
526: my $execdir=$perlvar{'lonDaemons'};
527: my $fh=IO::File->new(">>$execdir/logs/lond.log");
528: my $now=time;
529: my $local=localtime($now);
530: $lastlog=$local.': '.$message;
531: print $fh "$local ($$): $message\n";
532: }
533:
534: # ------------------------- Conditional log if $DEBUG true.
535: sub Debug {
536: my $message = shift;
537: if($DEBUG) {
538: &logthis($message);
539: }
540: }
541: # ------------------------------------------------------------------ Log status
542:
543: sub logstatus {
544: my $docdir=$perlvar{'lonDocRoot'};
545: {
546: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
547: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
548: $fh->close();
549: }
550: {
551: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
552: print $fh $status."\n".$lastlog."\n".time;
553: $fh->close();
554: }
555: }
556:
557: sub initnewstatus {
558: my $docdir=$perlvar{'lonDocRoot'};
559: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
560: my $now=time;
561: my $local=localtime($now);
562: print $fh "LOND status $local - parent $$\n\n";
563: opendir(DIR,"$docdir/lon-status/londchld");
564: while (my $filename=readdir(DIR)) {
565: unlink("$docdir/lon-status/londchld/$filename");
566: }
567: closedir(DIR);
568: }
569:
570: # -------------------------------------------------------------- Status setting
571:
572: sub status {
573: my $what=shift;
574: my $now=time;
575: my $local=localtime($now);
576: $status=$local.': '.$what;
577: $0='lond: '.$what.' '.$local;
578: }
579:
580: # -------------------------------------------------------- Escape Special Chars
581:
582: sub escape {
583: my $str=shift;
584: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
585: return $str;
586: }
587:
588: # ----------------------------------------------------- Un-Escape Special Chars
589:
590: sub unescape {
591: my $str=shift;
592: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
593: return $str;
594: }
595:
596: # ----------------------------------------------------------- Send USR1 to lonc
597:
598: sub reconlonc {
599: my $peerfile=shift;
600: &logthis("Trying to reconnect for $peerfile");
601: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
602: if (my $fh=IO::File->new("$loncfile")) {
603: my $loncpid=<$fh>;
604: chomp($loncpid);
605: if (kill 0 => $loncpid) {
606: &logthis("lonc at pid $loncpid responding, sending USR1");
607: kill USR1 => $loncpid;
608: } else {
609: &logthis(
610: "<font color=red>CRITICAL: "
611: ."lonc at pid $loncpid not responding, giving up</font>");
612: }
613: } else {
614: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
615: }
616: }
617:
618: # -------------------------------------------------- Non-critical communication
619:
620: sub subreply {
621: my ($cmd,$server)=@_;
622: my $peerfile="$perlvar{'lonSockDir'}/$server";
623: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
624: Type => SOCK_STREAM,
625: Timeout => 10)
626: or return "con_lost";
627: print $sclient "$cmd\n";
628: my $answer=<$sclient>;
629: chomp($answer);
630: if (!$answer) { $answer="con_lost"; }
631: return $answer;
632: }
633:
634: sub reply {
635: my ($cmd,$server)=@_;
636: my $answer;
637: if ($server ne $currenthostid) {
638: $answer=subreply($cmd,$server);
639: if ($answer eq 'con_lost') {
640: $answer=subreply("ping",$server);
641: if ($answer ne $server) {
642: &logthis("sub reply: answer != server answer is $answer, server is $server");
643: &reconlonc("$perlvar{'lonSockDir'}/$server");
644: }
645: $answer=subreply($cmd,$server);
646: }
647: } else {
648: $answer='self_reply';
649: }
650: return $answer;
651: }
652:
653: # -------------------------------------------------------------- Talk to lonsql
654:
655: sub sqlreply {
656: my ($cmd)=@_;
657: my $answer=subsqlreply($cmd);
658: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
659: return $answer;
660: }
661:
662: sub subsqlreply {
663: my ($cmd)=@_;
664: my $unixsock="mysqlsock";
665: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
666: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
667: Type => SOCK_STREAM,
668: Timeout => 10)
669: or return "con_lost";
670: print $sclient "$cmd\n";
671: my $answer=<$sclient>;
672: chomp($answer);
673: if (!$answer) { $answer="con_lost"; }
674: return $answer;
675: }
676:
677: # -------------------------------------------- Return path to profile directory
678:
679: sub propath {
680: my ($udom,$uname)=@_;
681: $udom=~s/\W//g;
682: $uname=~s/\W//g;
683: my $subdir=$uname.'__';
684: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
685: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
686: return $proname;
687: }
688:
689: # --------------------------------------- Is this the home server of an author?
690:
691: sub ishome {
692: my $author=shift;
693: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
694: my ($udom,$uname)=split(/\//,$author);
695: my $proname=propath($udom,$uname);
696: if (-e $proname) {
697: return 'owner';
698: } else {
699: return 'not_owner';
700: }
701: }
702:
703: # ======================================================= Continue main program
704: # ---------------------------------------------------- Fork once and dissociate
705:
706: my $fpid=fork;
707: exit if $fpid;
708: die "Couldn't fork: $!" unless defined ($fpid);
709:
710: POSIX::setsid() or die "Can't start new session: $!";
711:
712: # ------------------------------------------------------- Write our PID on disk
713:
714: my $execdir=$perlvar{'lonDaemons'};
715: open (PIDSAVE,">$execdir/logs/lond.pid");
716: print PIDSAVE "$$\n";
717: close(PIDSAVE);
718: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
719: &status('Starting');
720:
721:
722:
723: # ----------------------------------------------------- Install signal handlers
724:
725:
726: $SIG{CHLD} = \&REAPER;
727: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
728: $SIG{HUP} = \&HUPSMAN;
729: $SIG{USR1} = \&checkchildren;
730:
731:
732:
733: # --------------------------------------------------------------
734: # Accept connections. When a connection comes in, it is validated
735: # and if good, a child process is created to process transactions
736: # along the connection.
737:
738: while (1) {
739: $client = $server->accept() or next;
740: make_new_child($client);
741: }
742:
743: sub make_new_child {
744: my $pid;
745: my $cipher;
746: my $sigset;
747:
748: $client = shift;
749: &logthis("Attempting to start child");
750: # block signal for fork
751: $sigset = POSIX::SigSet->new(SIGINT);
752: sigprocmask(SIG_BLOCK, $sigset)
753: or die "Can't block SIGINT for fork: $!\n";
754:
755: die "fork: $!" unless defined ($pid = fork);
756:
757: if ($pid) {
758: # Parent records the child's birth and returns.
759: sigprocmask(SIG_UNBLOCK, $sigset)
760: or die "Can't unblock SIGINT for fork: $!\n";
761: $children{$pid} = 1;
762: $children++;
763: &status('Started child '.$pid);
764: return;
765: } else {
766: # Child can *not* return from this subroutine.
767: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
768: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
769: #don't get intercepted
770: $SIG{USR1}= \&logstatus;
771: $SIG{ALRM}= \&timeout;
772: $lastlog='Forked ';
773: $status='Forked';
774:
775: # unblock signals
776: sigprocmask(SIG_UNBLOCK, $sigset)
777: or die "Can't unblock SIGINT for fork: $!\n";
778:
779: my $tmpsnum=0;
780: #---------------------------------------------------- kerberos 5 initialization
781: &Authen::Krb5::init_context();
782: &Authen::Krb5::init_ets();
783:
784: &status('Accepted connection');
785: # =============================================================================
786: # do something with the connection
787: # -----------------------------------------------------------------------------
788: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
789: # connection liveness.
790: # see if we know client and check for spoof IP by challenge
791: my $caller = getpeername($client);
792: my ($port,$iaddr)=unpack_sockaddr_in($caller);
793: $clientip=inet_ntoa($iaddr);
794: my $clientrec=($hostid{$clientip} ne undef);
795: &logthis(
796: "<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
797: );
798: &status("Connecting $clientip ($hostid{$clientip})");
799: my $clientok;
800: if ($clientrec) {
801: &status("Waiting for init from $clientip ($hostid{$clientip})");
802: my $remotereq=<$client>;
803: $remotereq=~s/[^\w:]//g;
804: if ($remotereq =~ /^init/) {
805: &sethost("sethost:$perlvar{'lonHostID'}");
806: my $challenge="$$".time;
807: print $client "$challenge\n";
808: &status(
809: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
810: $remotereq=<$client>;
811: $remotereq=~s/\W//g;
812: if ($challenge eq $remotereq) {
813: $clientok=1;
814: print $client "ok\n";
815: } else {
816: &logthis(
817: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
818: &status('No challenge reply '.$clientip);
819: }
820: } else {
821: &logthis(
822: "<font color=blue>WARNING: "
823: ."$clientip failed to initialize: >$remotereq< </font>");
824: &status('No init '.$clientip);
825: }
826: } else {
827: &logthis(
828: "<font color=blue>WARNING: Unknown client $clientip</font>");
829: &status('Hung up on '.$clientip);
830: }
831: if ($clientok) {
832: # ---------------- New known client connecting, could mean machine online again
833:
834: foreach my $id (keys(%hostip)) {
835: if ($hostip{$id} ne $clientip ||
836: $hostip{$currenthostid} eq $clientip) {
837: # no need to try to do recon's to myself
838: next;
839: }
840: &reconlonc("$perlvar{'lonSockDir'}/$id");
841: }
842: &logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
843: &status('Will listen to '.$hostid{$clientip});
844: # ------------------------------------------------------------ Process requests
845: while (my $userinput=<$client>) {
846: chomp($userinput);
847: Debug("Request = $userinput\n");
848: &status('Processing '.$hostid{$clientip}.': '.$userinput);
849: my $wasenc=0;
850: alarm(120);
851: # ------------------------------------------------------------ See if encrypted
852: if ($userinput =~ /^enc/) {
853: if ($cipher) {
854: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
855: $userinput='';
856: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
857: $userinput.=
858: $cipher->decrypt(
859: pack("H16",substr($encinput,$encidx,16))
860: );
861: }
862: $userinput=substr($userinput,0,$cmdlength);
863: $wasenc=1;
864: }
865: }
866:
867: # ------------------------------------------------------------- Normal commands
868: # ------------------------------------------------------------------------ ping
869: if ($userinput =~ /^ping/) {
870: print $client "$currenthostid\n";
871: # ------------------------------------------------------------------------ pong
872: }elsif ($userinput =~ /^pong/) {
873: my $reply=&reply("ping",$hostid{$clientip});
874: print $client "$currenthostid:$reply\n";
875: # ------------------------------------------------------------------------ ekey
876: } elsif ($userinput =~ /^ekey/) {
877: my $buildkey=time.$$.int(rand 100000);
878: $buildkey=~tr/1-6/A-F/;
879: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
880: my $key=$currenthostid.$hostid{$clientip};
881: $key=~tr/a-z/A-Z/;
882: $key=~tr/G-P/0-9/;
883: $key=~tr/Q-Z/0-9/;
884: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
885: $key=substr($key,0,32);
886: my $cipherkey=pack("H32",$key);
887: $cipher=new IDEA $cipherkey;
888: print $client "$buildkey\n";
889: # ------------------------------------------------------------------------ load
890: } elsif ($userinput =~ /^load/) {
891: my $loadavg;
892: {
893: my $loadfile=IO::File->new('/proc/loadavg');
894: $loadavg=<$loadfile>;
895: }
896: $loadavg =~ s/\s.*//g;
897: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
898: print $client "$loadpercent\n";
899: # -------------------------------------------------------------------- userload
900: } elsif ($userinput =~ /^userload/) {
901: my $userloadpercent=&userload();
902: print $client "$userloadpercent\n";
903:
904: #
905: # Transactions requiring encryption:
906: #
907: # ----------------------------------------------------------------- currentauth
908: } elsif ($userinput =~ /^currentauth/) {
909: if ($wasenc==1) {
910: my ($cmd,$udom,$uname)=split(/:/,$userinput);
911: my $result = GetAuthType($udom, $uname);
912: if($result eq "nouser") {
913: print $client "unknown_user\n";
914: }
915: else {
916: print $client "$result\n"
917: }
918: } else {
919: print $client "refused\n";
920: }
921: #--------------------------------------------------------------------- pushfile
922: } elsif($userinput =~ /^pushfile/) {
923: if($wasenc == 1) {
924: my $cert = GetCertificate($userinput);
925: if(ValidManager($cert)) {
926: my $reply = PushFile($userinput);
927: print $client "$reply\n";
928: } else {
929: print $client "refused\n";
930: }
931: } else {
932: print $client "refused\n";
933: }
934: #--------------------------------------------------------------------- reinit
935: } elsif($userinput =~ /^reinit/) {
936: if ($wasenc == 1) {
937: my $cert = GetCertificate($userinput);
938: if(ValidManager($cert)) {
939: print $client "ok\n";
940: } else {
941: print $client "refused\n";
942: }
943: } else {
944: print $client "refused\n";
945: }
946: # ------------------------------------------------------------------------ auth
947: } elsif ($userinput =~ /^auth/) {
948: if ($wasenc==1) {
949: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
950: chomp($upass);
951: $upass=unescape($upass);
952: my $proname=propath($udom,$uname);
953: my $passfilename="$proname/passwd";
954: if (-e $passfilename) {
955: my $pf = IO::File->new($passfilename);
956: my $realpasswd=<$pf>;
957: chomp($realpasswd);
958: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
959: my $pwdcorrect=0;
960: if ($howpwd eq 'internal') {
961: &Debug("Internal auth");
962: $pwdcorrect=
963: (crypt($upass,$contentpwd) eq $contentpwd);
964: } elsif ($howpwd eq 'unix') {
965: &Debug("Unix auth");
966: if((getpwnam($uname))[1] eq "") { #no such user!
967: $pwdcorrect = 0;
968: } else {
969: $contentpwd=(getpwnam($uname))[1];
970: my $pwauth_path="/usr/local/sbin/pwauth";
971: unless ($contentpwd eq 'x') {
972: $pwdcorrect=
973: (crypt($upass,$contentpwd) eq
974: $contentpwd);
975: }
976:
977: elsif (-e $pwauth_path) {
978: open PWAUTH, "|$pwauth_path" or
979: die "Cannot invoke authentication";
980: print PWAUTH "$uname\n$upass\n";
981: close PWAUTH;
982: $pwdcorrect=!$?;
983: }
984: }
985: } elsif ($howpwd eq 'krb4') {
986: my $null=pack("C",0);
987: unless ($upass=~/$null/) {
988: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
989: ($uname,"",$contentpwd,'krbtgt',
990: $contentpwd,1,$upass);
991: if (!$krb4_error) {
992: $pwdcorrect = 1;
993: } else {
994: $pwdcorrect=0;
995: # log error if it is not a bad password
996: if ($krb4_error != 62) {
997: &logthis('krb4:'.$uname.','.$contentpwd.','.
998: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
999: }
1000: }
1001: }
1002: } elsif ($howpwd eq 'krb5') {
1003: my $null=pack("C",0);
1004: unless ($upass=~/$null/) {
1005: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
1006: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
1007: my $krbserver=&Authen::Krb5::parse_name($krbservice);
1008: my $credentials=&Authen::Krb5::cc_default();
1009: $credentials->initialize($krbclient);
1010: my $krbreturn =
1011: &Authen::Krb5::get_in_tkt_with_password(
1012: $krbclient,$krbserver,$upass,$credentials);
1013: # unless ($krbreturn) {
1014: # &logthis("Krb5 Error: ".
1015: # &Authen::Krb5::error());
1016: # }
1017: $pwdcorrect = ($krbreturn == 1);
1018: } else { $pwdcorrect=0; }
1019: } elsif ($howpwd eq 'localauth') {
1020: $pwdcorrect=&localauth::localauth($uname,$upass,
1021: $contentpwd);
1022: }
1023: if ($pwdcorrect) {
1024: print $client "authorized\n";
1025: } else {
1026: print $client "non_authorized\n";
1027: }
1028: } else {
1029: print $client "unknown_user\n";
1030: }
1031: } else {
1032: print $client "refused\n";
1033: }
1034: # ---------------------------------------------------------------------- passwd
1035: } elsif ($userinput =~ /^passwd/) {
1036: if ($wasenc==1) {
1037: my
1038: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
1039: chomp($npass);
1040: $upass=&unescape($upass);
1041: $npass=&unescape($npass);
1042: &Debug("Trying to change password for $uname");
1043: my $proname=propath($udom,$uname);
1044: my $passfilename="$proname/passwd";
1045: if (-e $passfilename) {
1046: my $realpasswd;
1047: { my $pf = IO::File->new($passfilename);
1048: $realpasswd=<$pf>; }
1049: chomp($realpasswd);
1050: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
1051: if ($howpwd eq 'internal') {
1052: &Debug("internal auth");
1053: if (crypt($upass,$contentpwd) eq $contentpwd) {
1054: my $salt=time;
1055: $salt=substr($salt,6,2);
1056: my $ncpass=crypt($npass,$salt);
1057: {
1058: my $pf;
1059: if ($pf = IO::File->new(">$passfilename")) {
1060: print $pf "internal:$ncpass\n";
1061: &logthis("Result of password change for $uname: pwchange_success");
1062: print $client "ok\n";
1063: } else {
1064: &logthis("Unable to open $uname passwd to change password");
1065: print $client "non_authorized\n";
1066: }
1067: }
1068:
1069: } else {
1070: print $client "non_authorized\n";
1071: }
1072: } elsif ($howpwd eq 'unix') {
1073: # Unix means we have to access /etc/password
1074: # one way or another.
1075: # First: Make sure the current password is
1076: # correct
1077: &Debug("auth is unix");
1078: $contentpwd=(getpwnam($uname))[1];
1079: my $pwdcorrect = "0";
1080: my $pwauth_path="/usr/local/sbin/pwauth";
1081: unless ($contentpwd eq 'x') {
1082: $pwdcorrect=
1083: (crypt($upass,$contentpwd) eq $contentpwd);
1084: } elsif (-e $pwauth_path) {
1085: open PWAUTH, "|$pwauth_path" or
1086: die "Cannot invoke authentication";
1087: print PWAUTH "$uname\n$upass\n";
1088: close PWAUTH;
1089: &Debug("exited pwauth with $? ($uname,$upass) ");
1090: $pwdcorrect=($? == 0);
1091: }
1092: if ($pwdcorrect) {
1093: my $execdir=$perlvar{'lonDaemons'};
1094: &Debug("Opening lcpasswd pipeline");
1095: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
1096: print $pf "$uname\n$npass\n$npass\n";
1097: close $pf;
1098: my $err = $?;
1099: my $result = ($err>0 ? 'pwchange_failure'
1100: : 'ok');
1101: &logthis("Result of password change for $uname: ".
1102: &lcpasswdstrerror($?));
1103: print $client "$result\n";
1104: } else {
1105: print $client "non_authorized\n";
1106: }
1107: } else {
1108: print $client "auth_mode_error\n";
1109: }
1110: } else {
1111: print $client "unknown_user\n";
1112: }
1113: } else {
1114: print $client "refused\n";
1115: }
1116: # -------------------------------------------------------------------- makeuser
1117: } elsif ($userinput =~ /^makeuser/) {
1118: &Debug("Make user received");
1119: my $oldumask=umask(0077);
1120: if ($wasenc==1) {
1121: my
1122: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1123: &Debug("cmd =".$cmd." $udom =".$udom.
1124: " uname=".$uname);
1125: chomp($npass);
1126: $npass=&unescape($npass);
1127: my $proname=propath($udom,$uname);
1128: my $passfilename="$proname/passwd";
1129: &Debug("Password file created will be:".
1130: $passfilename);
1131: if (-e $passfilename) {
1132: print $client "already_exists\n";
1133: } elsif ($udom ne $currentdomainid) {
1134: print $client "not_right_domain\n";
1135: } else {
1136: my @fpparts=split(/\//,$proname);
1137: my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
1138: my $fperror='';
1139: for (my $i=3;$i<=$#fpparts;$i++) {
1140: $fpnow.='/'.$fpparts[$i];
1141: unless (-e $fpnow) {
1142: unless (mkdir($fpnow,0777)) {
1143: $fperror="error: ".($!+0)
1144: ." mkdir failed while attempting "
1145: ."makeuser\n";
1146: }
1147: }
1148: }
1149: unless ($fperror) {
1150: my $result=&make_passwd_file($uname, $umode,$npass,
1151: $passfilename);
1152: print $client $result;
1153: } else {
1154: print $client "$fperror\n";
1155: }
1156: }
1157: } else {
1158: print $client "refused\n";
1159: }
1160: umask($oldumask);
1161: # -------------------------------------------------------------- changeuserauth
1162: } elsif ($userinput =~ /^changeuserauth/) {
1163: &Debug("Changing authorization");
1164: if ($wasenc==1) {
1165: my
1166: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1167: chomp($npass);
1168: &Debug("cmd = ".$cmd." domain= ".$udom.
1169: "uname =".$uname." umode= ".$umode);
1170: $npass=&unescape($npass);
1171: my $proname=&propath($udom,$uname);
1172: my $passfilename="$proname/passwd";
1173: if ($udom ne $currentdomainid) {
1174: print $client "not_right_domain\n";
1175: } else {
1176: my $result=&make_passwd_file($uname, $umode,$npass,
1177: $passfilename);
1178: print $client $result;
1179: }
1180: } else {
1181: print $client "refused\n";
1182: }
1183: # ------------------------------------------------------------------------ home
1184: } elsif ($userinput =~ /^home/) {
1185: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1186: chomp($uname);
1187: my $proname=propath($udom,$uname);
1188: if (-e $proname) {
1189: print $client "found\n";
1190: } else {
1191: print $client "not_found\n";
1192: }
1193: # ---------------------------------------------------------------------- update
1194: } elsif ($userinput =~ /^update/) {
1195: my ($cmd,$fname)=split(/:/,$userinput);
1196: my $ownership=ishome($fname);
1197: if ($ownership eq 'not_owner') {
1198: if (-e $fname) {
1199: my ($dev,$ino,$mode,$nlink,
1200: $uid,$gid,$rdev,$size,
1201: $atime,$mtime,$ctime,
1202: $blksize,$blocks)=stat($fname);
1203: my $now=time;
1204: my $since=$now-$atime;
1205: if ($since>$perlvar{'lonExpire'}) {
1206: my $reply=
1207: &reply("unsub:$fname","$hostid{$clientip}");
1208: unlink("$fname");
1209: } else {
1210: my $transname="$fname.in.transfer";
1211: my $remoteurl=
1212: reply("sub:$fname","$hostid{$clientip}");
1213: my $response;
1214: {
1215: my $ua=new LWP::UserAgent;
1216: my $request=new HTTP::Request('GET',"$remoteurl");
1217: $response=$ua->request($request,$transname);
1218: }
1219: if ($response->is_error()) {
1220: unlink($transname);
1221: my $message=$response->status_line;
1222: &logthis(
1223: "LWP GET: $message for $fname ($remoteurl)");
1224: } else {
1225: if ($remoteurl!~/\.meta$/) {
1226: my $ua=new LWP::UserAgent;
1227: my $mrequest=
1228: new HTTP::Request('GET',$remoteurl.'.meta');
1229: my $mresponse=
1230: $ua->request($mrequest,$fname.'.meta');
1231: if ($mresponse->is_error()) {
1232: unlink($fname.'.meta');
1233: }
1234: }
1235: rename($transname,$fname);
1236: }
1237: }
1238: print $client "ok\n";
1239: } else {
1240: print $client "not_found\n";
1241: }
1242: } else {
1243: print $client "rejected\n";
1244: }
1245: # -------------------------------------- fetch a user file from a remote server
1246: } elsif ($userinput =~ /^fetchuserfile/) {
1247: my ($cmd,$fname)=split(/:/,$userinput);
1248: my ($udom,$uname,$ufile)=split(/\//,$fname);
1249: my $udir=propath($udom,$uname).'/userfiles';
1250: unless (-e $udir) { mkdir($udir,0770); }
1251: if (-e $udir) {
1252: $ufile=~s/^[\.\~]+//;
1253: $ufile=~s/\///g;
1254: my $transname=$udir.'/'.$ufile;
1255: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1256: my $response;
1257: {
1258: my $ua=new LWP::UserAgent;
1259: my $request=new HTTP::Request('GET',"$remoteurl");
1260: $response=$ua->request($request,$transname);
1261: }
1262: if ($response->is_error()) {
1263: unlink($transname);
1264: my $message=$response->status_line;
1265: &logthis(
1266: "LWP GET: $message for $fname ($remoteurl)");
1267: print $client "failed\n";
1268: } else {
1269: print $client "ok\n";
1270: }
1271: } else {
1272: print $client "not_home\n";
1273: }
1274: # ------------------------------------------ authenticate access to a user file
1275: } elsif ($userinput =~ /^tokenauthuserfile/) {
1276: my ($cmd,$fname,$session)=split(/:/,$userinput);
1277: chomp($session);
1278: my $reply='non_auth';
1279: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1280: $session.'.id')) {
1281: while (my $line=<ENVIN>) {
1282: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1283: }
1284: close(ENVIN);
1285: print $client $reply."\n";
1286: } else {
1287: print $client "invalid_token\n";
1288: }
1289: # ----------------------------------------------------------------- unsubscribe
1290: } elsif ($userinput =~ /^unsub/) {
1291: my ($cmd,$fname)=split(/:/,$userinput);
1292: if (-e $fname) {
1293: print $client &unsub($client,$fname,$clientip);
1294: } else {
1295: print $client "not_found\n";
1296: }
1297: # ------------------------------------------------------------------- subscribe
1298: } elsif ($userinput =~ /^sub/) {
1299: print $client &subscribe($userinput,$clientip);
1300: # ------------------------------------------------------------- current version
1301: } elsif ($userinput =~ /^currentversion/) {
1302: my ($cmd,$fname)=split(/:/,$userinput);
1303: print $client ¤tversion($fname)."\n";
1304: # ------------------------------------------------------------------------- log
1305: } elsif ($userinput =~ /^log/) {
1306: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1307: chomp($what);
1308: my $proname=propath($udom,$uname);
1309: my $now=time;
1310: {
1311: my $hfh;
1312: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1313: print $hfh "$now:$hostid{$clientip}:$what\n";
1314: print $client "ok\n";
1315: } else {
1316: print $client "error: ".($!+0)
1317: ." IO::File->new Failed "
1318: ."while attempting log\n";
1319: }
1320: }
1321: # ------------------------------------------------------------------------- put
1322: } elsif ($userinput =~ /^put/) {
1323: my ($cmd,$udom,$uname,$namespace,$what)
1324: =split(/:/,$userinput);
1325: $namespace=~s/\//\_/g;
1326: $namespace=~s/\W//g;
1327: if ($namespace ne 'roles') {
1328: chomp($what);
1329: my $proname=propath($udom,$uname);
1330: my $now=time;
1331: unless ($namespace=~/^nohist\_/) {
1332: my $hfh;
1333: if (
1334: $hfh=IO::File->new(">>$proname/$namespace.hist")
1335: ) { print $hfh "P:$now:$what\n"; }
1336: }
1337: my @pairs=split(/\&/,$what);
1338: my %hash;
1339: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1340: foreach my $pair (@pairs) {
1341: my ($key,$value)=split(/=/,$pair);
1342: $hash{$key}=$value;
1343: }
1344: if (untie(%hash)) {
1345: print $client "ok\n";
1346: } else {
1347: print $client "error: ".($!+0)
1348: ." untie(GDBM) failed ".
1349: "while attempting put\n";
1350: }
1351: } else {
1352: print $client "error: ".($!)
1353: ." tie(GDBM) Failed ".
1354: "while attempting put\n";
1355: }
1356: } else {
1357: print $client "refused\n";
1358: }
1359: # -------------------------------------------------------------------- rolesput
1360: } elsif ($userinput =~ /^rolesput/) {
1361: &Debug("rolesput");
1362: if ($wasenc==1) {
1363: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1364: =split(/:/,$userinput);
1365: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1366: "user = ".$exeuser." udom=".$udom.
1367: "what = ".$what);
1368: my $namespace='roles';
1369: chomp($what);
1370: my $proname=propath($udom,$uname);
1371: my $now=time;
1372: {
1373: my $hfh;
1374: if (
1375: $hfh=IO::File->new(">>$proname/$namespace.hist")
1376: ) {
1377: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1378: }
1379: }
1380: my @pairs=split(/\&/,$what);
1381: my %hash;
1382: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1383: foreach my $pair (@pairs) {
1384: my ($key,$value)=split(/=/,$pair);
1385: &ManagePermissions($key, $udom, $uname,
1386: &GetAuthType( $udom,
1387: $uname));
1388: $hash{$key}=$value;
1389: }
1390: if (untie(%hash)) {
1391: print $client "ok\n";
1392: } else {
1393: print $client "error: ".($!+0)
1394: ." untie(GDBM) Failed ".
1395: "while attempting rolesput\n";
1396: }
1397: } else {
1398: print $client "error: ".($!+0)
1399: ." tie(GDBM) Failed ".
1400: "while attempting rolesput\n";
1401: }
1402: } else {
1403: print $client "refused\n";
1404: }
1405: # -------------------------------------------------------------------- rolesdel
1406: } elsif ($userinput =~ /^rolesdel/) {
1407: &Debug("rolesdel");
1408: if ($wasenc==1) {
1409: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1410: =split(/:/,$userinput);
1411: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1412: "user = ".$exeuser." udom=".$udom.
1413: "what = ".$what);
1414: my $namespace='roles';
1415: chomp($what);
1416: my $proname=propath($udom,$uname);
1417: my $now=time;
1418: {
1419: my $hfh;
1420: if (
1421: $hfh=IO::File->new(">>$proname/$namespace.hist")
1422: ) {
1423: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1424: }
1425: }
1426: my @rolekeys=split(/\&/,$what);
1427: my %hash;
1428: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1429: foreach my $key (@rolekeys) {
1430: delete $hash{$key};
1431: }
1432: if (untie(%hash)) {
1433: print $client "ok\n";
1434: } else {
1435: print $client "error: ".($!+0)
1436: ." untie(GDBM) Failed ".
1437: "while attempting rolesdel\n";
1438: }
1439: } else {
1440: print $client "error: ".($!+0)
1441: ." tie(GDBM) Failed ".
1442: "while attempting rolesdel\n";
1443: }
1444: } else {
1445: print $client "refused\n";
1446: }
1447: # ------------------------------------------------------------------------- get
1448: } elsif ($userinput =~ /^get/) {
1449: my ($cmd,$udom,$uname,$namespace,$what)
1450: =split(/:/,$userinput);
1451: $namespace=~s/\//\_/g;
1452: $namespace=~s/\W//g;
1453: chomp($what);
1454: my @queries=split(/\&/,$what);
1455: my $proname=propath($udom,$uname);
1456: my $qresult='';
1457: my %hash;
1458: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1459: for (my $i=0;$i<=$#queries;$i++) {
1460: $qresult.="$hash{$queries[$i]}&";
1461: }
1462: if (untie(%hash)) {
1463: $qresult=~s/\&$//;
1464: print $client "$qresult\n";
1465: } else {
1466: print $client "error: ".($!+0)
1467: ." untie(GDBM) Failed ".
1468: "while attempting get\n";
1469: }
1470: } else {
1471: if ($!+0 == 2) {
1472: print $client "error:No such file or ".
1473: "GDBM reported bad block error\n";
1474: } else {
1475: print $client "error: ".($!+0)
1476: ." tie(GDBM) Failed ".
1477: "while attempting get\n";
1478: }
1479: }
1480: # ------------------------------------------------------------------------ eget
1481: } elsif ($userinput =~ /^eget/) {
1482: my ($cmd,$udom,$uname,$namespace,$what)
1483: =split(/:/,$userinput);
1484: $namespace=~s/\//\_/g;
1485: $namespace=~s/\W//g;
1486: chomp($what);
1487: my @queries=split(/\&/,$what);
1488: my $proname=propath($udom,$uname);
1489: my $qresult='';
1490: my %hash;
1491: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1492: for (my $i=0;$i<=$#queries;$i++) {
1493: $qresult.="$hash{$queries[$i]}&";
1494: }
1495: if (untie(%hash)) {
1496: $qresult=~s/\&$//;
1497: if ($cipher) {
1498: my $cmdlength=length($qresult);
1499: $qresult.=" ";
1500: my $encqresult='';
1501: for
1502: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1503: $encqresult.=
1504: unpack("H16",
1505: $cipher->encrypt(substr($qresult,$encidx,8)));
1506: }
1507: print $client "enc:$cmdlength:$encqresult\n";
1508: } else {
1509: print $client "error:no_key\n";
1510: }
1511: } else {
1512: print $client "error: ".($!+0)
1513: ." untie(GDBM) Failed ".
1514: "while attempting eget\n";
1515: }
1516: } else {
1517: print $client "error: ".($!+0)
1518: ." tie(GDBM) Failed ".
1519: "while attempting eget\n";
1520: }
1521: # ------------------------------------------------------------------------- del
1522: } elsif ($userinput =~ /^del/) {
1523: my ($cmd,$udom,$uname,$namespace,$what)
1524: =split(/:/,$userinput);
1525: $namespace=~s/\//\_/g;
1526: $namespace=~s/\W//g;
1527: chomp($what);
1528: my $proname=propath($udom,$uname);
1529: my $now=time;
1530: unless ($namespace=~/^nohist\_/) {
1531: my $hfh;
1532: if (
1533: $hfh=IO::File->new(">>$proname/$namespace.hist")
1534: ) { print $hfh "D:$now:$what\n"; }
1535: }
1536: my @keys=split(/\&/,$what);
1537: my %hash;
1538: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1539: foreach my $key (@keys) {
1540: delete($hash{$key});
1541: }
1542: if (untie(%hash)) {
1543: print $client "ok\n";
1544: } else {
1545: print $client "error: ".($!+0)
1546: ." untie(GDBM) Failed ".
1547: "while attempting del\n";
1548: }
1549: } else {
1550: print $client "error: ".($!+0)
1551: ." tie(GDBM) Failed ".
1552: "while attempting del\n";
1553: }
1554: # ------------------------------------------------------------------------ keys
1555: } elsif ($userinput =~ /^keys/) {
1556: my ($cmd,$udom,$uname,$namespace)
1557: =split(/:/,$userinput);
1558: $namespace=~s/\//\_/g;
1559: $namespace=~s/\W//g;
1560: my $proname=propath($udom,$uname);
1561: my $qresult='';
1562: my %hash;
1563: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1564: foreach my $key (keys %hash) {
1565: $qresult.="$key&";
1566: }
1567: if (untie(%hash)) {
1568: $qresult=~s/\&$//;
1569: print $client "$qresult\n";
1570: } else {
1571: print $client "error: ".($!+0)
1572: ." untie(GDBM) Failed ".
1573: "while attempting keys\n";
1574: }
1575: } else {
1576: print $client "error: ".($!+0)
1577: ." tie(GDBM) Failed ".
1578: "while attempting keys\n";
1579: }
1580: # ----------------------------------------------------------------- dumpcurrent
1581: } elsif ($userinput =~ /^currentdump/) {
1582: my ($cmd,$udom,$uname,$namespace)
1583: =split(/:/,$userinput);
1584: $namespace=~s/\//\_/g;
1585: $namespace=~s/\W//g;
1586: my $qresult='';
1587: my $proname=propath($udom,$uname);
1588: my %hash;
1589: if (tie(%hash,'GDBM_File',
1590: "$proname/$namespace.db",
1591: &GDBM_READER(),0640)) {
1592: # Structure of %data:
1593: # $data{$symb}->{$parameter}=$value;
1594: # $data{$symb}->{'v.'.$parameter}=$version;
1595: # since $parameter will be unescaped, we do not
1596: # have to worry about silly parameter names...
1597: my %data = ();
1598: while (my ($key,$value) = each(%hash)) {
1599: my ($v,$symb,$param) = split(/:/,$key);
1600: next if ($v eq 'version' || $symb eq 'keys');
1601: next if (exists($data{$symb}) &&
1602: exists($data{$symb}->{$param}) &&
1603: $data{$symb}->{'v.'.$param} > $v);
1604: $data{$symb}->{$param}=$value;
1605: $data{$symb}->{'v.'.$param}=$v;
1606: }
1607: if (untie(%hash)) {
1608: while (my ($symb,$param_hash) = each(%data)) {
1609: while(my ($param,$value) = each (%$param_hash)){
1610: next if ($param =~ /^v\./);
1611: $qresult.=$symb.':'.$param.'='.$value.'&';
1612: }
1613: }
1614: chop($qresult);
1615: print $client "$qresult\n";
1616: } else {
1617: print $client "error: ".($!+0)
1618: ." untie(GDBM) Failed ".
1619: "while attempting currentdump\n";
1620: }
1621: } else {
1622: print $client "error: ".($!+0)
1623: ." tie(GDBM) Failed ".
1624: "while attempting currentdump\n";
1625: }
1626: # ------------------------------------------------------------------------ dump
1627: } elsif ($userinput =~ /^dump/) {
1628: my ($cmd,$udom,$uname,$namespace,$regexp)
1629: =split(/:/,$userinput);
1630: $namespace=~s/\//\_/g;
1631: $namespace=~s/\W//g;
1632: if (defined($regexp)) {
1633: $regexp=&unescape($regexp);
1634: } else {
1635: $regexp='.';
1636: }
1637: my $qresult='';
1638: my $proname=propath($udom,$uname);
1639: my %hash;
1640: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1641: study($regexp);
1642: while (my ($key,$value) = each(%hash)) {
1643: if ($regexp eq '.') {
1644: $qresult.=$key.'='.$value.'&';
1645: } else {
1646: my $unescapeKey = &unescape($key);
1647: if (eval('$unescapeKey=~/$regexp/')) {
1648: $qresult.="$key=$value&";
1649: }
1650: }
1651: }
1652: if (untie(%hash)) {
1653: chop($qresult);
1654: print $client "$qresult\n";
1655: } else {
1656: print $client "error: ".($!+0)
1657: ." untie(GDBM) Failed ".
1658: "while attempting dump\n";
1659: }
1660: } else {
1661: print $client "error: ".($!+0)
1662: ." tie(GDBM) Failed ".
1663: "while attempting dump\n";
1664: }
1665: # ----------------------------------------------------------------------- store
1666: } elsif ($userinput =~ /^store/) {
1667: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1668: =split(/:/,$userinput);
1669: $namespace=~s/\//\_/g;
1670: $namespace=~s/\W//g;
1671: if ($namespace ne 'roles') {
1672: chomp($what);
1673: my $proname=propath($udom,$uname);
1674: my $now=time;
1675: unless ($namespace=~/^nohist\_/) {
1676: my $hfh;
1677: if (
1678: $hfh=IO::File->new(">>$proname/$namespace.hist")
1679: ) { print $hfh "P:$now:$rid:$what\n"; }
1680: }
1681: my @pairs=split(/\&/,$what);
1682: my %hash;
1683: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1684: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1685: my $key;
1686: $hash{"version:$rid"}++;
1687: my $version=$hash{"version:$rid"};
1688: my $allkeys='';
1689: foreach my $pair (@pairs) {
1690: my ($key,$value)=split(/=/,$pair);
1691: $allkeys.=$key.':';
1692: $hash{"$version:$rid:$key"}=$value;
1693: }
1694: $hash{"$version:$rid:timestamp"}=$now;
1695: $allkeys.='timestamp';
1696: $hash{"$version:keys:$rid"}=$allkeys;
1697: if (untie(%hash)) {
1698: print $client "ok\n";
1699: } else {
1700: print $client "error: ".($!+0)
1701: ." untie(GDBM) Failed ".
1702: "while attempting store\n";
1703: }
1704: } else {
1705: print $client "error: ".($!+0)
1706: ." tie(GDBM) Failed ".
1707: "while attempting store\n";
1708: }
1709: } else {
1710: print $client "refused\n";
1711: }
1712: # --------------------------------------------------------------------- restore
1713: } elsif ($userinput =~ /^restore/) {
1714: my ($cmd,$udom,$uname,$namespace,$rid)
1715: =split(/:/,$userinput);
1716: $namespace=~s/\//\_/g;
1717: $namespace=~s/\W//g;
1718: chomp($rid);
1719: my $proname=propath($udom,$uname);
1720: my $qresult='';
1721: my %hash;
1722: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1723: my $version=$hash{"version:$rid"};
1724: $qresult.="version=$version&";
1725: my $scope;
1726: for ($scope=1;$scope<=$version;$scope++) {
1727: my $vkeys=$hash{"$scope:keys:$rid"};
1728: my @keys=split(/:/,$vkeys);
1729: my $key;
1730: $qresult.="$scope:keys=$vkeys&";
1731: foreach $key (@keys) {
1732: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1733: }
1734: }
1735: if (untie(%hash)) {
1736: $qresult=~s/\&$//;
1737: print $client "$qresult\n";
1738: } else {
1739: print $client "error: ".($!+0)
1740: ." untie(GDBM) Failed ".
1741: "while attempting restore\n";
1742: }
1743: } else {
1744: print $client "error: ".($!+0)
1745: ." tie(GDBM) Failed ".
1746: "while attempting restore\n";
1747: }
1748: # -------------------------------------------------------------------- chatsend
1749: } elsif ($userinput =~ /^chatsend/) {
1750: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1751: &chatadd($cdom,$cnum,$newpost);
1752: print $client "ok\n";
1753: # -------------------------------------------------------------------- chatretr
1754: } elsif ($userinput =~ /^chatretr/) {
1755: my
1756: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
1757: my $reply='';
1758: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
1759: $reply.=&escape($_).':';
1760: }
1761: $reply=~s/\:$//;
1762: print $client $reply."\n";
1763: # ------------------------------------------------------------------- querysend
1764: } elsif ($userinput =~ /^querysend/) {
1765: my ($cmd,$query,
1766: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1767: $query=~s/\n*$//g;
1768: print $client "".
1769: sqlreply("$hostid{$clientip}\&$query".
1770: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1771: # ------------------------------------------------------------------ queryreply
1772: } elsif ($userinput =~ /^queryreply/) {
1773: my ($cmd,$id,$reply)=split(/:/,$userinput);
1774: my $store;
1775: my $execdir=$perlvar{'lonDaemons'};
1776: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1777: $reply=~s/\&/\n/g;
1778: print $store $reply;
1779: close $store;
1780: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1781: print $store2 "done\n";
1782: close $store2;
1783: print $client "ok\n";
1784: }
1785: else {
1786: print $client "error: ".($!+0)
1787: ." IO::File->new Failed ".
1788: "while attempting queryreply\n";
1789: }
1790: # ----------------------------------------------------------------- courseidput
1791: } elsif ($userinput =~ /^courseidput/) {
1792: my ($cmd,$udom,$what)=split(/:/,$userinput);
1793: chomp($what);
1794: $udom=~s/\W//g;
1795: my $proname=
1796: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1797: my $now=time;
1798: my @pairs=split(/\&/,$what);
1799: my %hash;
1800: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1801: foreach my $pair (@pairs) {
1802: my ($key,$value)=split(/=/,$pair);
1803: $hash{$key}=$value.':'.$now;
1804: }
1805: if (untie(%hash)) {
1806: print $client "ok\n";
1807: } else {
1808: print $client "error: ".($!+0)
1809: ." untie(GDBM) Failed ".
1810: "while attempting courseidput\n";
1811: }
1812: } else {
1813: print $client "error: ".($!+0)
1814: ." tie(GDBM) Failed ".
1815: "while attempting courseidput\n";
1816: }
1817: # ---------------------------------------------------------------- courseiddump
1818: } elsif ($userinput =~ /^courseiddump/) {
1819: my ($cmd,$udom,$since,$description)
1820: =split(/:/,$userinput);
1821: if (defined($description)) {
1822: $description=&unescape($description);
1823: } else {
1824: $description='.';
1825: }
1826: unless (defined($since)) { $since=0; }
1827: my $qresult='';
1828: my $proname=
1829: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1830: my %hash;
1831: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1832: while (my ($key,$value) = each(%hash)) {
1833: my ($descr,$lasttime)=split(/\:/,$value);
1834: if ($lasttime<$since) { next; }
1835: if ($description eq '.') {
1836: $qresult.=$key.'='.$descr.'&';
1837: } else {
1838: my $unescapeVal = &unescape($descr);
1839: if (eval('$unescapeVal=~/$description/i')) {
1840: $qresult.="$key=$descr&";
1841: }
1842: }
1843: }
1844: if (untie(%hash)) {
1845: chop($qresult);
1846: print $client "$qresult\n";
1847: } else {
1848: print $client "error: ".($!+0)
1849: ." untie(GDBM) Failed ".
1850: "while attempting courseiddump\n";
1851: }
1852: } else {
1853: print $client "error: ".($!+0)
1854: ." tie(GDBM) Failed ".
1855: "while attempting courseiddump\n";
1856: }
1857: # ----------------------------------------------------------------------- idput
1858: } elsif ($userinput =~ /^idput/) {
1859: my ($cmd,$udom,$what)=split(/:/,$userinput);
1860: chomp($what);
1861: $udom=~s/\W//g;
1862: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1863: my $now=time;
1864: {
1865: my $hfh;
1866: if (
1867: $hfh=IO::File->new(">>$proname.hist")
1868: ) { print $hfh "P:$now:$what\n"; }
1869: }
1870: my @pairs=split(/\&/,$what);
1871: my %hash;
1872: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1873: foreach my $pair (@pairs) {
1874: my ($key,$value)=split(/=/,$pair);
1875: $hash{$key}=$value;
1876: }
1877: if (untie(%hash)) {
1878: print $client "ok\n";
1879: } else {
1880: print $client "error: ".($!+0)
1881: ." untie(GDBM) Failed ".
1882: "while attempting idput\n";
1883: }
1884: } else {
1885: print $client "error: ".($!+0)
1886: ." tie(GDBM) Failed ".
1887: "while attempting idput\n";
1888: }
1889: # ----------------------------------------------------------------------- idget
1890: } elsif ($userinput =~ /^idget/) {
1891: my ($cmd,$udom,$what)=split(/:/,$userinput);
1892: chomp($what);
1893: $udom=~s/\W//g;
1894: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1895: my @queries=split(/\&/,$what);
1896: my $qresult='';
1897: my %hash;
1898: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1899: for (my $i=0;$i<=$#queries;$i++) {
1900: $qresult.="$hash{$queries[$i]}&";
1901: }
1902: if (untie(%hash)) {
1903: $qresult=~s/\&$//;
1904: print $client "$qresult\n";
1905: } else {
1906: print $client "error: ".($!+0)
1907: ." untie(GDBM) Failed ".
1908: "while attempting idget\n";
1909: }
1910: } else {
1911: print $client "error: ".($!+0)
1912: ." tie(GDBM) Failed ".
1913: "while attempting idget\n";
1914: }
1915: # ---------------------------------------------------------------------- tmpput
1916: } elsif ($userinput =~ /^tmpput/) {
1917: my ($cmd,$what)=split(/:/,$userinput);
1918: my $store;
1919: $tmpsnum++;
1920: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1921: $id=~s/\W/\_/g;
1922: $what=~s/\n//g;
1923: my $execdir=$perlvar{'lonDaemons'};
1924: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1925: print $store $what;
1926: close $store;
1927: print $client "$id\n";
1928: }
1929: else {
1930: print $client "error: ".($!+0)
1931: ."IO::File->new Failed ".
1932: "while attempting tmpput\n";
1933: }
1934:
1935: # ---------------------------------------------------------------------- tmpget
1936: } elsif ($userinput =~ /^tmpget/) {
1937: my ($cmd,$id)=split(/:/,$userinput);
1938: chomp($id);
1939: $id=~s/\W/\_/g;
1940: my $store;
1941: my $execdir=$perlvar{'lonDaemons'};
1942: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1943: my $reply=<$store>;
1944: print $client "$reply\n";
1945: close $store;
1946: }
1947: else {
1948: print $client "error: ".($!+0)
1949: ."IO::File->new Failed ".
1950: "while attempting tmpget\n";
1951: }
1952:
1953: # ---------------------------------------------------------------------- tmpdel
1954: } elsif ($userinput =~ /^tmpdel/) {
1955: my ($cmd,$id)=split(/:/,$userinput);
1956: chomp($id);
1957: $id=~s/\W/\_/g;
1958: my $execdir=$perlvar{'lonDaemons'};
1959: if (unlink("$execdir/tmp/$id.tmp")) {
1960: print $client "ok\n";
1961: } else {
1962: print $client "error: ".($!+0)
1963: ."Unlink tmp Failed ".
1964: "while attempting tmpdel\n";
1965: }
1966: # -------------------------------------------------------------------------- ls
1967: } elsif ($userinput =~ /^ls/) {
1968: my ($cmd,$ulsdir)=split(/:/,$userinput);
1969: my $ulsout='';
1970: my $ulsfn;
1971: if (-e $ulsdir) {
1972: if(-d $ulsdir) {
1973: if (opendir(LSDIR,$ulsdir)) {
1974: while ($ulsfn=readdir(LSDIR)) {
1975: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1976: $ulsout.=$ulsfn.'&'.
1977: join('&',@ulsstats).':';
1978: }
1979: closedir(LSDIR);
1980: }
1981: } else {
1982: my @ulsstats=stat($ulsdir);
1983: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1984: }
1985: } else {
1986: $ulsout='no_such_dir';
1987: }
1988: if ($ulsout eq '') { $ulsout='empty'; }
1989: print $client "$ulsout\n";
1990: # ----------------------------------------------------------------- setannounce
1991: } elsif ($userinput =~ /^setannounce/) {
1992: my ($cmd,$announcement)=split(/:/,$userinput);
1993: chomp($announcement);
1994: $announcement=&unescape($announcement);
1995: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
1996: '/announcement.txt')) {
1997: print $store $announcement;
1998: close $store;
1999: print $client "ok\n";
2000: } else {
2001: print $client "error: ".($!+0)."\n";
2002: }
2003: # ------------------------------------------------------------------ Hanging up
2004: } elsif (($userinput =~ /^exit/) ||
2005: ($userinput =~ /^init/)) {
2006: &logthis(
2007: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
2008: print $client "bye\n";
2009: $client->close();
2010: last;
2011: # ------------------------------------------------------------- unknown command
2012: } elsif ($userinput =~ /^sethost:/) {
2013: print $client &sethost($userinput)."\n";
2014: } elsif ($userinput =~/^version:/) {
2015: print $client &version($userinput)."\n";
2016: } else {
2017: # unknown command
2018: print $client "unknown_cmd\n";
2019: }
2020: # -------------------------------------------------------------------- complete
2021: alarm(0);
2022: &status('Listening to '.$hostid{$clientip});
2023: }
2024: # --------------------------------------------- client unknown or fishy, refuse
2025: } else {
2026: print $client "refused\n";
2027: $client->close();
2028: &logthis("<font color=blue>WARNING: "
2029: ."Rejected client $clientip, closing connection</font>");
2030: }
2031: }
2032:
2033: # =============================================================================
2034:
2035: &logthis("<font color=red>CRITICAL: "
2036: ."Disconnect from $clientip ($hostid{$clientip})</font>");
2037:
2038:
2039: # this exit is VERY important, otherwise the child will become
2040: # a producer of more and more children, forking yourself into
2041: # process death.
2042: exit;
2043:
2044: }
2045:
2046:
2047: #
2048: # Checks to see if the input roleput request was to set
2049: # an author role. If so, invokes the lchtmldir script to set
2050: # up a correct public_html
2051: # Parameters:
2052: # request - The request sent to the rolesput subchunk.
2053: # We're looking for /domain/_au
2054: # domain - The domain in which the user is having roles doctored.
2055: # user - Name of the user for which the role is being put.
2056: # authtype - The authentication type associated with the user.
2057: #
2058: sub ManagePermissions
2059: {
2060: my $request = shift;
2061: my $domain = shift;
2062: my $user = shift;
2063: my $authtype= shift;
2064:
2065: # See if the request is of the form /$domain/_au
2066: &logthis("ruequest is $request");
2067: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
2068: my $execdir = $perlvar{'lonDaemons'};
2069: my $userhome= "/home/$user" ;
2070: &logthis("system $execdir/lchtmldir $userhome $user $authtype");
2071: system("$execdir/lchtmldir $userhome $user $authtype");
2072: }
2073: }
2074: #
2075: # GetAuthType - Determines the authorization type of a user in a domain.
2076:
2077: # Returns the authorization type or nouser if there is no such user.
2078: #
2079: sub GetAuthType
2080: {
2081: my $domain = shift;
2082: my $user = shift;
2083:
2084: Debug("GetAuthType( $domain, $user ) \n");
2085: my $proname = &propath($domain, $user);
2086: my $passwdfile = "$proname/passwd";
2087: if( -e $passwdfile ) {
2088: my $pf = IO::File->new($passwdfile);
2089: my $realpassword = <$pf>;
2090: chomp($realpassword);
2091: Debug("Password info = $realpassword\n");
2092: my ($authtype, $contentpwd) = split(/:/, $realpassword);
2093: Debug("Authtype = $authtype, content = $contentpwd\n");
2094: my $availinfo = '';
2095: if($authtype eq 'krb4' or $authtype eq 'krb5') {
2096: $availinfo = $contentpwd;
2097: }
2098:
2099: return "$authtype:$availinfo";
2100: }
2101: else {
2102: Debug("Returning nouser");
2103: return "nouser";
2104: }
2105: }
2106:
2107: sub addline {
2108: my ($fname,$hostid,$ip,$newline)=@_;
2109: my $contents;
2110: my $found=0;
2111: my $expr='^'.$hostid.':'.$ip.':';
2112: $expr =~ s/\./\\\./g;
2113: my $sh;
2114: if ($sh=IO::File->new("$fname.subscription")) {
2115: while (my $subline=<$sh>) {
2116: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
2117: }
2118: $sh->close();
2119: }
2120: $sh=IO::File->new(">$fname.subscription");
2121: if ($contents) { print $sh $contents; }
2122: if ($newline) { print $sh $newline; }
2123: $sh->close();
2124: return $found;
2125: }
2126:
2127: sub getchat {
2128: my ($cdom,$cname,$udom,$uname)=@_;
2129: my %hash;
2130: my $proname=&propath($cdom,$cname);
2131: my @entries=();
2132: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2133: &GDBM_READER(),0640)) {
2134: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2135: untie %hash;
2136: }
2137: my @participants=();
2138: my $cutoff=time-60;
2139: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
2140: &GDBM_WRCREAT(),0640)) {
2141: $hash{$uname.':'.$udom}=time;
2142: foreach (sort keys %hash) {
2143: if ($hash{$_}>$cutoff) {
2144: $participants[$#participants+1]='active_participant:'.$_;
2145: }
2146: }
2147: untie %hash;
2148: }
2149: return (@participants,@entries);
2150: }
2151:
2152: sub chatadd {
2153: my ($cdom,$cname,$newchat)=@_;
2154: my %hash;
2155: my $proname=&propath($cdom,$cname);
2156: my @entries=();
2157: my $time=time;
2158: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
2159: &GDBM_WRCREAT(),0640)) {
2160: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
2161: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
2162: my ($thentime,$idnum)=split(/\_/,$lastid);
2163: my $newid=$time.'_000000';
2164: if ($thentime==$time) {
2165: $idnum=~s/^0+//;
2166: $idnum++;
2167: $idnum=substr('000000'.$idnum,-6,6);
2168: $newid=$time.'_'.$idnum;
2169: }
2170: $hash{$newid}=$newchat;
2171: my $expired=$time-3600;
2172: foreach (keys %hash) {
2173: my ($thistime)=($_=~/(\d+)\_/);
2174: if ($thistime<$expired) {
2175: delete $hash{$_};
2176: }
2177: }
2178: untie %hash;
2179: }
2180: {
2181: my $hfh;
2182: if ($hfh=IO::File->new(">>$proname/chatroom.log")) {
2183: print $hfh "$time:".&unescape($newchat)."\n";
2184: }
2185: }
2186: }
2187:
2188: sub unsub {
2189: my ($fname,$clientip)=@_;
2190: my $result;
2191: if (unlink("$fname.$hostid{$clientip}")) {
2192: $result="ok\n";
2193: } else {
2194: $result="not_subscribed\n";
2195: }
2196: if (-e "$fname.subscription") {
2197: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
2198: if ($found) { $result="ok\n"; }
2199: } else {
2200: if ($result != "ok\n") { $result="not_subscribed\n"; }
2201: }
2202: return $result;
2203: }
2204:
2205: sub currentversion {
2206: my $fname=shift;
2207: my $version=-1;
2208: my $ulsdir='';
2209: if ($fname=~/^(.+)\/[^\/]+$/) {
2210: $ulsdir=$1;
2211: }
2212: my ($fnamere1,$fnamere2);
2213: # remove version if already specified
2214: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
2215: # get the bits that go before and after the version number
2216: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
2217: $fnamere1=$1;
2218: $fnamere2='.'.$2;
2219: }
2220: if (-e $fname) { $version=1; }
2221: if (-e $ulsdir) {
2222: if(-d $ulsdir) {
2223: if (opendir(LSDIR,$ulsdir)) {
2224: my $ulsfn;
2225: while ($ulsfn=readdir(LSDIR)) {
2226: # see if this is a regular file (ignore links produced earlier)
2227: my $thisfile=$ulsdir.'/'.$ulsfn;
2228: unless (-l $thisfile) {
2229: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
2230: if ($1>$version) { $version=$1; }
2231: }
2232: }
2233: }
2234: closedir(LSDIR);
2235: $version++;
2236: }
2237: }
2238: }
2239: return $version;
2240: }
2241:
2242: sub thisversion {
2243: my $fname=shift;
2244: my $version=-1;
2245: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
2246: $version=$1;
2247: }
2248: return $version;
2249: }
2250:
2251: sub subscribe {
2252: my ($userinput,$clientip)=@_;
2253: my $result;
2254: my ($cmd,$fname)=split(/:/,$userinput);
2255: my $ownership=&ishome($fname);
2256: if ($ownership eq 'owner') {
2257: # explitly asking for the current version?
2258: unless (-e $fname) {
2259: my $currentversion=¤tversion($fname);
2260: if (&thisversion($fname)==$currentversion) {
2261: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
2262: my $root=$1;
2263: my $extension=$2;
2264: symlink($root.'.'.$extension,
2265: $root.'.'.$currentversion.'.'.$extension);
2266: unless ($extension=~/\.meta$/) {
2267: symlink($root.'.'.$extension.'.meta',
2268: $root.'.'.$currentversion.'.'.$extension.'.meta');
2269: }
2270: }
2271: }
2272: }
2273: if (-e $fname) {
2274: if (-d $fname) {
2275: $result="directory\n";
2276: } else {
2277: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
2278: my $now=time;
2279: my $found=&addline($fname,$hostid{$clientip},$clientip,
2280: "$hostid{$clientip}:$clientip:$now\n");
2281: if ($found) { $result="$fname\n"; }
2282: # if they were subscribed to only meta data, delete that
2283: # subscription, when you subscribe to a file you also get
2284: # the metadata
2285: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
2286: $fname=~s/\/home\/httpd\/html\/res/raw/;
2287: $fname="http://$thisserver/".$fname;
2288: $result="$fname\n";
2289: }
2290: } else {
2291: $result="not_found\n";
2292: }
2293: } else {
2294: $result="rejected\n";
2295: }
2296: return $result;
2297: }
2298:
2299: sub make_passwd_file {
2300: my ($uname, $umode,$npass,$passfilename)=@_;
2301: my $result="ok\n";
2302: if ($umode eq 'krb4' or $umode eq 'krb5') {
2303: {
2304: my $pf = IO::File->new(">$passfilename");
2305: print $pf "$umode:$npass\n";
2306: }
2307: } elsif ($umode eq 'internal') {
2308: my $salt=time;
2309: $salt=substr($salt,6,2);
2310: my $ncpass=crypt($npass,$salt);
2311: {
2312: &Debug("Creating internal auth");
2313: my $pf = IO::File->new(">$passfilename");
2314: print $pf "internal:$ncpass\n";
2315: }
2316: } elsif ($umode eq 'localauth') {
2317: {
2318: my $pf = IO::File->new(">$passfilename");
2319: print $pf "localauth:$npass\n";
2320: }
2321: } elsif ($umode eq 'unix') {
2322: {
2323: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
2324: {
2325: &Debug("Executing external: ".$execpath);
2326: &Debug("user = ".$uname.", Password =". $npass);
2327: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
2328: print $se "$uname\n";
2329: print $se "$npass\n";
2330: print $se "$npass\n";
2331: }
2332: my $useraddok = $?;
2333: if($useraddok > 0) {
2334: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
2335: }
2336: my $pf = IO::File->new(">$passfilename");
2337: print $pf "unix:\n";
2338: }
2339: } elsif ($umode eq 'none') {
2340: {
2341: my $pf = IO::File->new(">$passfilename");
2342: print $pf "none:\n";
2343: }
2344: } else {
2345: $result="auth_mode_error\n";
2346: }
2347: return $result;
2348: }
2349:
2350: sub sethost {
2351: my ($remotereq) = @_;
2352: my (undef,$hostid)=split(/:/,$remotereq);
2353: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
2354: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
2355: $currenthostid=$hostid;
2356: $currentdomainid=$hostdom{$hostid};
2357: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
2358: } else {
2359: &logthis("Requested host id $hostid not an alias of ".
2360: $perlvar{'lonHostID'}." refusing connection");
2361: return 'unable_to_set';
2362: }
2363: return 'ok';
2364: }
2365:
2366: sub version {
2367: my ($userinput)=@_;
2368: $remoteVERSION=(split(/:/,$userinput))[1];
2369: return "version:$VERSION";
2370: }
2371:
2372: #There is a copy of this in lonnet.pm
2373: sub userload {
2374: my $numusers=0;
2375: {
2376: opendir(LONIDS,$perlvar{'lonIDsDir'});
2377: my $filename;
2378: my $curtime=time;
2379: while ($filename=readdir(LONIDS)) {
2380: if ($filename eq '.' || $filename eq '..') {next;}
2381: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
2382: if ($curtime-$mtime < 3600) { $numusers++; }
2383: }
2384: closedir(LONIDS);
2385: }
2386: my $userloadpercent=0;
2387: my $maxuserload=$perlvar{'lonUserLoadLim'};
2388: if ($maxuserload) {
2389: $userloadpercent=100*$numusers/$maxuserload;
2390: }
2391: $userloadpercent=sprintf("%.2f",$userloadpercent);
2392: return $userloadpercent;
2393: }
2394:
2395: # ----------------------------------- POD (plain old documentation, CPAN style)
2396:
2397: =head1 NAME
2398:
2399: lond - "LON Daemon" Server (port "LOND" 5663)
2400:
2401: =head1 SYNOPSIS
2402:
2403: Usage: B<lond>
2404:
2405: Should only be run as user=www. This is a command-line script which
2406: is invoked by B<loncron>. There is no expectation that a typical user
2407: will manually start B<lond> from the command-line. (In other words,
2408: DO NOT START B<lond> YOURSELF.)
2409:
2410: =head1 DESCRIPTION
2411:
2412: There are two characteristics associated with the running of B<lond>,
2413: PROCESS MANAGEMENT (starting, stopping, handling child processes)
2414: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
2415: subscriptions, etc). These are described in two large
2416: sections below.
2417:
2418: B<PROCESS MANAGEMENT>
2419:
2420: Preforker - server who forks first. Runs as a daemon. HUPs.
2421: Uses IDEA encryption
2422:
2423: B<lond> forks off children processes that correspond to the other servers
2424: in the network. Management of these processes can be done at the
2425: parent process level or the child process level.
2426:
2427: B<logs/lond.log> is the location of log messages.
2428:
2429: The process management is now explained in terms of linux shell commands,
2430: subroutines internal to this code, and signal assignments:
2431:
2432: =over 4
2433:
2434: =item *
2435:
2436: PID is stored in B<logs/lond.pid>
2437:
2438: This is the process id number of the parent B<lond> process.
2439:
2440: =item *
2441:
2442: SIGTERM and SIGINT
2443:
2444: Parent signal assignment:
2445: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
2446:
2447: Child signal assignment:
2448: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
2449: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
2450: to restart a new child.)
2451:
2452: Command-line invocations:
2453: B<kill> B<-s> SIGTERM I<PID>
2454: B<kill> B<-s> SIGINT I<PID>
2455:
2456: Subroutine B<HUNTSMAN>:
2457: This is only invoked for the B<lond> parent I<PID>.
2458: This kills all the children, and then the parent.
2459: The B<lonc.pid> file is cleared.
2460:
2461: =item *
2462:
2463: SIGHUP
2464:
2465: Current bug:
2466: This signal can only be processed the first time
2467: on the parent process. Subsequent SIGHUP signals
2468: have no effect.
2469:
2470: Parent signal assignment:
2471: $SIG{HUP} = \&HUPSMAN;
2472:
2473: Child signal assignment:
2474: none (nothing happens)
2475:
2476: Command-line invocations:
2477: B<kill> B<-s> SIGHUP I<PID>
2478:
2479: Subroutine B<HUPSMAN>:
2480: This is only invoked for the B<lond> parent I<PID>,
2481: This kills all the children, and then the parent.
2482: The B<lond.pid> file is cleared.
2483:
2484: =item *
2485:
2486: SIGUSR1
2487:
2488: Parent signal assignment:
2489: $SIG{USR1} = \&USRMAN;
2490:
2491: Child signal assignment:
2492: $SIG{USR1}= \&logstatus;
2493:
2494: Command-line invocations:
2495: B<kill> B<-s> SIGUSR1 I<PID>
2496:
2497: Subroutine B<USRMAN>:
2498: When invoked for the B<lond> parent I<PID>,
2499: SIGUSR1 is sent to all the children, and the status of
2500: each connection is logged.
2501:
2502: =item *
2503:
2504: SIGCHLD
2505:
2506: Parent signal assignment:
2507: $SIG{CHLD} = \&REAPER;
2508:
2509: Child signal assignment:
2510: none
2511:
2512: Command-line invocations:
2513: B<kill> B<-s> SIGCHLD I<PID>
2514:
2515: Subroutine B<REAPER>:
2516: This is only invoked for the B<lond> parent I<PID>.
2517: Information pertaining to the child is removed.
2518: The socket port is cleaned up.
2519:
2520: =back
2521:
2522: B<SERVER-SIDE ACTIVITIES>
2523:
2524: Server-side information can be accepted in an encrypted or non-encrypted
2525: method.
2526:
2527: =over 4
2528:
2529: =item ping
2530:
2531: Query a client in the hosts.tab table; "Are you there?"
2532:
2533: =item pong
2534:
2535: Respond to a ping query.
2536:
2537: =item ekey
2538:
2539: Read in encrypted key, make cipher. Respond with a buildkey.
2540:
2541: =item load
2542:
2543: Respond with CPU load based on a computation upon /proc/loadavg.
2544:
2545: =item currentauth
2546:
2547: Reply with current authentication information (only over an
2548: encrypted channel).
2549:
2550: =item auth
2551:
2552: Only over an encrypted channel, reply as to whether a user's
2553: authentication information can be validated.
2554:
2555: =item passwd
2556:
2557: Allow for a password to be set.
2558:
2559: =item makeuser
2560:
2561: Make a user.
2562:
2563: =item passwd
2564:
2565: Allow for authentication mechanism and password to be changed.
2566:
2567: =item home
2568:
2569: Respond to a question "are you the home for a given user?"
2570:
2571: =item update
2572:
2573: Update contents of a subscribed resource.
2574:
2575: =item unsubscribe
2576:
2577: The server is unsubscribing from a resource.
2578:
2579: =item subscribe
2580:
2581: The server is subscribing to a resource.
2582:
2583: =item log
2584:
2585: Place in B<logs/lond.log>
2586:
2587: =item put
2588:
2589: stores hash in namespace
2590:
2591: =item rolesput
2592:
2593: put a role into a user's environment
2594:
2595: =item get
2596:
2597: returns hash with keys from array
2598: reference filled in from namespace
2599:
2600: =item eget
2601:
2602: returns hash with keys from array
2603: reference filled in from namesp (encrypts the return communication)
2604:
2605: =item rolesget
2606:
2607: get a role from a user's environment
2608:
2609: =item del
2610:
2611: deletes keys out of array from namespace
2612:
2613: =item keys
2614:
2615: returns namespace keys
2616:
2617: =item dump
2618:
2619: dumps the complete (or key matching regexp) namespace into a hash
2620:
2621: =item store
2622:
2623: stores hash permanently
2624: for this url; hashref needs to be given and should be a \%hashname; the
2625: remaining args aren't required and if they aren't passed or are '' they will
2626: be derived from the ENV
2627:
2628: =item restore
2629:
2630: returns a hash for a given url
2631:
2632: =item querysend
2633:
2634: Tells client about the lonsql process that has been launched in response
2635: to a sent query.
2636:
2637: =item queryreply
2638:
2639: Accept information from lonsql and make appropriate storage in temporary
2640: file space.
2641:
2642: =item idput
2643:
2644: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2645: for each student, defined perhaps by the institutional Registrar.)
2646:
2647: =item idget
2648:
2649: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2650: for each student, defined perhaps by the institutional Registrar.)
2651:
2652: =item tmpput
2653:
2654: Accept and store information in temporary space.
2655:
2656: =item tmpget
2657:
2658: Send along temporarily stored information.
2659:
2660: =item ls
2661:
2662: List part of a user's directory.
2663:
2664: =item pushtable
2665:
2666: Pushes a file in /home/httpd/lonTab directory. Currently limited to:
2667: hosts.tab and domain.tab. The old file is copied to *.tab.backup but
2668: must be restored manually in case of a problem with the new table file.
2669: pushtable requires that the request be encrypted and validated via
2670: ValidateManager. The form of the command is:
2671: enc:pushtable tablename <tablecontents> \n
2672: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a
2673: cleartext newline.
2674:
2675: =item Hanging up (exit or init)
2676:
2677: What to do when a client tells the server that they (the client)
2678: are leaving the network.
2679:
2680: =item unknown command
2681:
2682: If B<lond> is sent an unknown command (not in the list above),
2683: it replys to the client "unknown_cmd".
2684:
2685:
2686: =item UNKNOWN CLIENT
2687:
2688: If the anti-spoofing algorithm cannot verify the client,
2689: the client is rejected (with a "refused" message sent
2690: to the client, and the connection is closed.
2691:
2692: =back
2693:
2694: =head1 PREREQUISITES
2695:
2696: IO::Socket
2697: IO::File
2698: Apache::File
2699: Symbol
2700: POSIX
2701: Crypt::IDEA
2702: LWP::UserAgent()
2703: GDBM_File
2704: Authen::Krb4
2705: Authen::Krb5
2706:
2707: =head1 COREQUISITES
2708:
2709: =head1 OSNAMES
2710:
2711: linux
2712:
2713: =head1 SCRIPT CATEGORIES
2714:
2715: Server/Process
2716:
2717: =cut
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