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lond
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1.100:
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Mon Sep 30 21:38:18 2002 UTC (21 years, 7 months ago) by
matthew
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Rewritten to speed up 'dump' calls with no regular expression.
Use while ... each instead of foreach.
Do not unescape anything or use eval if the regular expression is '.'.
Use chop instead of a regular expression to remove trailing '&'.
One enhancement that might speed up the statistics page is removing the
call to 'eval'.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.100 2002/09/30 21:38:18 matthew 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: # 06/26 Scott Harrison
35: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
36: # 12/05 Scott Harrison
37: # 12/05,12/13,12/29 Gerd Kortemeyer
38: # YEAR=2001
39: # Jan 01 Scott Harrison
40: # 02/12 Gerd Kortemeyer
41: # 03/15 Scott Harrison
42: # 03/24 Gerd Kortemeyer
43: # 04/02 Scott Harrison
44: # 05/11,05/28,08/30 Gerd Kortemeyer
45: # 9/30,10/22,11/13,11/15,11/16 Scott Harrison
46: # 11/26,11/27 Gerd Kortemeyer
47: # 12/20 Scott Harrison
48: # 12/22 Gerd Kortemeyer
49: # YEAR=2002
50: # 01/20/02,02/05 Gerd Kortemeyer
51: # 02/05 Guy Albertelli
52: # 02/07 Scott Harrison
53: # 02/12 Gerd Kortemeyer
54: # 02/19 Matthew Hall
55: # 02/25 Gerd Kortemeyer
56: # 05/11 Scott Harrison
57: ###
58:
59: # based on "Perl Cookbook" ISBN 1-56592-243-3
60: # preforker - server who forks first
61: # runs as a daemon
62: # HUPs
63: # uses IDEA encryption
64:
65: use lib '/home/httpd/lib/perl/';
66: use LONCAPA::Configuration;
67:
68: use IO::Socket;
69: use IO::File;
70: use Apache::File;
71: use Symbol;
72: use POSIX;
73: use Crypt::IDEA;
74: use LWP::UserAgent();
75: use GDBM_File;
76: use Authen::Krb4;
77: use Authen::Krb5;
78: use lib '/home/httpd/lib/perl/';
79: use localauth;
80:
81: my $DEBUG = 0; # Non zero to enable debug log entries.
82:
83: my $status='';
84: my $lastlog='';
85:
86: #
87: # The array below are password error strings."
88: #
89: my $lastpwderror = 13; # Largest error number from lcpasswd.
90: my @passwderrors = ("ok",
91: "lcpasswd must be run as user 'www'",
92: "lcpasswd got incorrect number of arguments",
93: "lcpasswd did not get the right nubmer of input text lines",
94: "lcpasswd too many simultaneous pwd changes in progress",
95: "lcpasswd User does not exist.",
96: "lcpasswd Incorrect current passwd",
97: "lcpasswd Unable to su to root.",
98: "lcpasswd Cannot set new passwd.",
99: "lcpasswd Username has invalid characters",
100: "lcpasswd Invalid characters in password",
101: "11", "12",
102: "lcpasswd Password mismatch");
103:
104:
105: # The array below are lcuseradd error strings.:
106:
107: my $lastadderror = 13;
108: my @adderrors = ("ok",
109: "User ID mismatch, lcuseradd must run as user www",
110: "lcuseradd Incorrect number of command line parameters must be 3",
111: "lcuseradd Incorrect number of stdinput lines, must be 3",
112: "lcuseradd Too many other simultaneous pwd changes in progress",
113: "lcuseradd User does not exist",
114: "lcuseradd Unabel to mak ewww member of users's group",
115: "lcuseradd Unable to su to root",
116: "lcuseradd Unable to set password",
117: "lcuseradd Usrname has invbalid charcters",
118: "lcuseradd Password has an invalid character",
119: "lcuseradd User already exists",
120: "lcuseradd Could not add user.",
121: "lcuseradd Password mismatch");
122:
123:
124: #
125: # Convert an error return code from lcpasswd to a string value.
126: #
127: sub lcpasswdstrerror {
128: my $ErrorCode = shift;
129: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
130: return "lcpasswd Unrecognized error return value ".$ErrorCode;
131: } else {
132: return $passwderrors[$ErrorCode];
133: }
134: }
135:
136: #
137: # Convert an error return code from lcuseradd to a string value:
138: #
139: sub lcuseraddstrerror {
140: my $ErrorCode = shift;
141: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
142: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
143: } else {
144: return $adderrors[$ErrorCode];
145: }
146: }
147:
148: # grabs exception and records it to log before exiting
149: sub catchexception {
150: my ($error)=@_;
151: $SIG{'QUIT'}='DEFAULT';
152: $SIG{__DIE__}='DEFAULT';
153: &logthis("<font color=red>CRITICAL: "
154: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
155: ."a crash with this error msg->[$error]</font>");
156: &logthis('Famous last words: '.$status.' - '.$lastlog);
157: if ($client) { print $client "error: $error\n"; }
158: $server->close();
159: die($error);
160: }
161:
162: sub timeout {
163: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
164: &catchexception('Timeout');
165: }
166: # -------------------------------- Set signal handlers to record abnormal exits
167:
168: $SIG{'QUIT'}=\&catchexception;
169: $SIG{__DIE__}=\&catchexception;
170:
171: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
172: &status("Read loncapa.conf and loncapa_apache.conf");
173: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
174: my %perlvar=%{$perlvarref};
175: undef $perlvarref;
176:
177: # ----------------------------- Make sure this process is running from user=www
178: my $wwwid=getpwnam('www');
179: if ($wwwid!=$<) {
180: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
181: $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
182: system("echo 'User ID mismatch. lond must be run as user www.' |\
183: mailto $emailto -s '$subj' > /dev/null");
184: exit 1;
185: }
186:
187: # --------------------------------------------- Check if other instance running
188:
189: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
190:
191: if (-e $pidfile) {
192: my $lfh=IO::File->new("$pidfile");
193: my $pide=<$lfh>;
194: chomp($pide);
195: if (kill 0 => $pide) { die "already running"; }
196: }
197:
198: $PREFORK=4; # number of children to maintain, at least four spare
199:
200: # ------------------------------------------------------------- Read hosts file
201:
202: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
203:
204: while ($configline=<CONFIG>) {
205: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
206: chomp($ip); $ip=~s/\D+$//;
207: $hostid{$ip}=$id;
208: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
209: $PREFORK++;
210: }
211: close(CONFIG);
212:
213: # establish SERVER socket, bind and listen.
214: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
215: Type => SOCK_STREAM,
216: Proto => 'tcp',
217: Reuse => 1,
218: Listen => 10 )
219: or die "making socket: $@\n";
220:
221: # --------------------------------------------------------- Do global variables
222:
223: # global variables
224:
225: $MAX_CLIENTS_PER_CHILD = 50; # number of clients each child should
226: # process
227: %children = (); # keys are current child process IDs
228: $children = 0; # current number of children
229:
230: sub REAPER { # takes care of dead children
231: $SIG{CHLD} = \&REAPER;
232: my $pid = wait;
233: if (defined($children{$pid})) {
234: &logthis("Child $pid died");
235: $children --;
236: delete $children{$pid};
237: } else {
238: &logthis("Unknown Child $pid died");
239: }
240: }
241:
242: sub HUNTSMAN { # signal handler for SIGINT
243: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
244: kill 'INT' => keys %children;
245: &logthis("Free socket: ".shutdown($server,2)); # free up socket
246: my $execdir=$perlvar{'lonDaemons'};
247: unlink("$execdir/logs/lond.pid");
248: &logthis("<font color=red>CRITICAL: Shutting down</font>");
249: exit; # clean up with dignity
250: }
251:
252: sub HUPSMAN { # signal handler for SIGHUP
253: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
254: kill 'INT' => keys %children;
255: &logthis("Free socket: ".shutdown($server,2)); # free up socket
256: &logthis("<font color=red>CRITICAL: Restarting</font>");
257: unlink("$execdir/logs/lond.pid");
258: my $execdir=$perlvar{'lonDaemons'};
259: exec("$execdir/lond"); # here we go again
260: }
261:
262: sub checkchildren {
263: &initnewstatus();
264: &logstatus();
265: &logthis('Going to check on the children');
266: $docdir=$perlvar{'lonDocRoot'};
267: foreach (sort keys %children) {
268: sleep 1;
269: unless (kill 'USR1' => $_) {
270: &logthis ('Child '.$_.' is dead');
271: &logstatus($$.' is dead');
272: }
273: }
274: sleep 5;
275: foreach (sort keys %children) {
276: unless (-e "$docdir/lon-status/londchld/$_.txt") {
277: &logthis('Child '.$_.' did not respond');
278: kill 9 => $_;
279: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
280: $subj="LON: $perlvar{'lonHostID'} killed lond process $_";
281: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
282: $execdir=$perlvar{'lonDaemons'};
283: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`
284: }
285: }
286: }
287:
288: # --------------------------------------------------------------------- Logging
289:
290: sub logthis {
291: my $message=shift;
292: my $execdir=$perlvar{'lonDaemons'};
293: my $fh=IO::File->new(">>$execdir/logs/lond.log");
294: my $now=time;
295: my $local=localtime($now);
296: $lastlog=$local.': '.$message;
297: print $fh "$local ($$): $message\n";
298: }
299:
300: # ------------------------- Conditional log if $DEBUG true.
301: sub Debug {
302: my $message = shift;
303: if($DEBUG) {
304: &logthis($message);
305: }
306: }
307: # ------------------------------------------------------------------ Log status
308:
309: sub logstatus {
310: my $docdir=$perlvar{'lonDocRoot'};
311: {
312: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
313: print $fh $$."\t".$status."\t".$lastlog."\n";
314: $fh->close();
315: }
316: {
317: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
318: print $fh $status."\n".$lastlog."\n".time;
319: $fh->close();
320: }
321: }
322:
323: sub initnewstatus {
324: my $docdir=$perlvar{'lonDocRoot'};
325: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
326: my $now=time;
327: my $local=localtime($now);
328: print $fh "LOND status $local - parent $$\n\n";
329: opendir(DIR,"$docdir/lon-status/londchld");
330: while ($filename=readdir(DIR)) {
331: unlink("$docdir/lon-status/londchld/$filename");
332: }
333: closedir(DIR);
334: }
335:
336: # -------------------------------------------------------------- Status setting
337:
338: sub status {
339: my $what=shift;
340: my $now=time;
341: my $local=localtime($now);
342: $status=$local.': '.$what;
343: }
344:
345: # -------------------------------------------------------- Escape Special Chars
346:
347: sub escape {
348: my $str=shift;
349: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
350: return $str;
351: }
352:
353: # ----------------------------------------------------- Un-Escape Special Chars
354:
355: sub unescape {
356: my $str=shift;
357: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
358: return $str;
359: }
360:
361: # ----------------------------------------------------------- Send USR1 to lonc
362:
363: sub reconlonc {
364: my $peerfile=shift;
365: &logthis("Trying to reconnect for $peerfile");
366: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
367: if (my $fh=IO::File->new("$loncfile")) {
368: my $loncpid=<$fh>;
369: chomp($loncpid);
370: if (kill 0 => $loncpid) {
371: &logthis("lonc at pid $loncpid responding, sending USR1");
372: kill USR1 => $loncpid;
373: sleep 5;
374: if (-e "$peerfile") { return; }
375: &logthis("$peerfile still not there, give it another try");
376: sleep 10;
377: if (-e "$peerfile") { return; }
378: &logthis(
379: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
380: } else {
381: &logthis(
382: "<font color=red>CRITICAL: "
383: ."lonc at pid $loncpid not responding, giving up</font>");
384: }
385: } else {
386: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
387: }
388: }
389:
390: # -------------------------------------------------- Non-critical communication
391:
392: sub subreply {
393: my ($cmd,$server)=@_;
394: my $peerfile="$perlvar{'lonSockDir'}/$server";
395: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
396: Type => SOCK_STREAM,
397: Timeout => 10)
398: or return "con_lost";
399: print $sclient "$cmd\n";
400: my $answer=<$sclient>;
401: chomp($answer);
402: if (!$answer) { $answer="con_lost"; }
403: return $answer;
404: }
405:
406: sub reply {
407: my ($cmd,$server)=@_;
408: my $answer;
409: if ($server ne $perlvar{'lonHostID'}) {
410: $answer=subreply($cmd,$server);
411: if ($answer eq 'con_lost') {
412: $answer=subreply("ping",$server);
413: if ($answer ne $server) {
414: &logthis("sub reply: answer != server");
415: &reconlonc("$perlvar{'lonSockDir'}/$server");
416: }
417: $answer=subreply($cmd,$server);
418: }
419: } else {
420: $answer='self_reply';
421: }
422: return $answer;
423: }
424:
425: # -------------------------------------------------------------- Talk to lonsql
426:
427: sub sqlreply {
428: my ($cmd)=@_;
429: my $answer=subsqlreply($cmd);
430: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
431: return $answer;
432: }
433:
434: sub subsqlreply {
435: my ($cmd)=@_;
436: my $unixsock="mysqlsock";
437: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
438: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
439: Type => SOCK_STREAM,
440: Timeout => 10)
441: or return "con_lost";
442: print $sclient "$cmd\n";
443: my $answer=<$sclient>;
444: chomp($answer);
445: if (!$answer) { $answer="con_lost"; }
446: return $answer;
447: }
448:
449: # -------------------------------------------- Return path to profile directory
450:
451: sub propath {
452: my ($udom,$uname)=@_;
453: $udom=~s/\W//g;
454: $uname=~s/\W//g;
455: my $subdir=$uname.'__';
456: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
457: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
458: return $proname;
459: }
460:
461: # --------------------------------------- Is this the home server of an author?
462:
463: sub ishome {
464: my $author=shift;
465: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
466: my ($udom,$uname)=split(/\//,$author);
467: my $proname=propath($udom,$uname);
468: if (-e $proname) {
469: return 'owner';
470: } else {
471: return 'not_owner';
472: }
473: }
474:
475: # ======================================================= Continue main program
476: # ---------------------------------------------------- Fork once and dissociate
477:
478: $fpid=fork;
479: exit if $fpid;
480: die "Couldn't fork: $!" unless defined ($fpid);
481:
482: POSIX::setsid() or die "Can't start new session: $!";
483:
484: # ------------------------------------------------------- Write our PID on disk
485:
486: $execdir=$perlvar{'lonDaemons'};
487: open (PIDSAVE,">$execdir/logs/lond.pid");
488: print PIDSAVE "$$\n";
489: close(PIDSAVE);
490: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
491: &status('Starting');
492:
493: # ------------------------------------------------------- Now we are on our own
494:
495: # Fork off our children.
496: for (1 .. $PREFORK) {
497: make_new_child();
498: }
499:
500: # ----------------------------------------------------- Install signal handlers
501:
502: &status('Forked children');
503:
504: $SIG{CHLD} = \&REAPER;
505: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
506: $SIG{HUP} = \&HUPSMAN;
507: $SIG{USR1} = \&checkchildren;
508:
509: # And maintain the population.
510: while (1) {
511: &status('Sleeping');
512: sleep; # wait for a signal (i.e., child's death)
513: &logthis('Woke up');
514: &status('Woke up');
515: for ($i = $children; $i < $PREFORK; $i++) {
516: make_new_child(); # top up the child pool
517: }
518: }
519:
520: sub make_new_child {
521: my $pid;
522: my $cipher;
523: my $sigset;
524: &logthis("Attempting to start child");
525: # block signal for fork
526: $sigset = POSIX::SigSet->new(SIGINT);
527: sigprocmask(SIG_BLOCK, $sigset)
528: or die "Can't block SIGINT for fork: $!\n";
529:
530: die "fork: $!" unless defined ($pid = fork);
531:
532: if ($pid) {
533: # Parent records the child's birth and returns.
534: sigprocmask(SIG_UNBLOCK, $sigset)
535: or die "Can't unblock SIGINT for fork: $!\n";
536: $children{$pid} = 1;
537: $children++;
538: &status('Started child '.$pid);
539: return;
540: } else {
541: # Child can *not* return from this subroutine.
542: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
543: $SIG{USR1}= \&logstatus;
544: $SIG{ALRM}= \&timeout;
545: $lastlog='Forked ';
546: $status='Forked';
547:
548: # unblock signals
549: sigprocmask(SIG_UNBLOCK, $sigset)
550: or die "Can't unblock SIGINT for fork: $!\n";
551:
552: $tmpsnum=0;
553: #---------------------------------------------------- kerberos 5 initialization
554: &Authen::Krb5::init_context();
555: &Authen::Krb5::init_ets();
556:
557: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
558: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
559: &status('Idle, waiting for connection');
560: $client = $server->accept() or last;
561: &status('Accepted connection');
562: # =============================================================================
563: # do something with the connection
564: # -----------------------------------------------------------------------------
565: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
566: # connection liveness.
567: # see if we know client and check for spoof IP by challenge
568: my $caller=getpeername($client);
569: my ($port,$iaddr)=unpack_sockaddr_in($caller);
570: my $clientip=inet_ntoa($iaddr);
571: my $clientrec=($hostid{$clientip} ne undef);
572: &logthis(
573: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
574: );
575: &status("Connecting $clientip ($hostid{$clientip})");
576: my $clientok;
577: if ($clientrec) {
578: &status("Waiting for init from $clientip ($hostid{$clientip})");
579: my $remotereq=<$client>;
580: $remotereq=~s/\W//g;
581: if ($remotereq eq 'init') {
582: my $challenge="$$".time;
583: print $client "$challenge\n";
584: &status(
585: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
586: $remotereq=<$client>;
587: $remotereq=~s/\W//g;
588: if ($challenge eq $remotereq) {
589: $clientok=1;
590: print $client "ok\n";
591: } else {
592: &logthis(
593: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
594: &status('No challenge reply '.$clientip);
595: }
596: } else {
597: &logthis(
598: "<font color=blue>WARNING: "
599: ."$clientip failed to initialize: >$remotereq< </font>");
600: &status('No init '.$clientip);
601: }
602: } else {
603: &logthis(
604: "<font color=blue>WARNING: Unknown client $clientip</font>");
605: &status('Hung up on '.$clientip);
606: }
607: if ($clientok) {
608: # ---------------- New known client connecting, could mean machine online again
609:
610: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
611: &logthis(
612: "<font color=green>Established connection: $hostid{$clientip}</font>");
613: &status('Will listen to '.$hostid{$clientip});
614: # ------------------------------------------------------------ Process requests
615: while (my $userinput=<$client>) {
616: chomp($userinput);
617: Debug("Request = $userinput\n");
618: &status('Processing '.$hostid{$clientip}.': '.$userinput);
619: my $wasenc=0;
620: alarm(120);
621: # ------------------------------------------------------------ See if encrypted
622: if ($userinput =~ /^enc/) {
623: if ($cipher) {
624: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
625: $userinput='';
626: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
627: $userinput.=
628: $cipher->decrypt(
629: pack("H16",substr($encinput,$encidx,16))
630: );
631: }
632: $userinput=substr($userinput,0,$cmdlength);
633: $wasenc=1;
634: }
635: }
636:
637: # ------------------------------------------------------------- Normal commands
638: # ------------------------------------------------------------------------ ping
639: if ($userinput =~ /^ping/) {
640: print $client "$perlvar{'lonHostID'}\n";
641: # ------------------------------------------------------------------------ pong
642: } elsif ($userinput =~ /^pong/) {
643: $reply=reply("ping",$hostid{$clientip});
644: print $client "$perlvar{'lonHostID'}:$reply\n";
645: # ------------------------------------------------------------------------ ekey
646: } elsif ($userinput =~ /^ekey/) {
647: my $buildkey=time.$$.int(rand 100000);
648: $buildkey=~tr/1-6/A-F/;
649: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
650: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
651: $key=~tr/a-z/A-Z/;
652: $key=~tr/G-P/0-9/;
653: $key=~tr/Q-Z/0-9/;
654: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
655: $key=substr($key,0,32);
656: my $cipherkey=pack("H32",$key);
657: $cipher=new IDEA $cipherkey;
658: print $client "$buildkey\n";
659: # ------------------------------------------------------------------------ load
660: } elsif ($userinput =~ /^load/) {
661: my $loadavg;
662: {
663: my $loadfile=IO::File->new('/proc/loadavg');
664: $loadavg=<$loadfile>;
665: }
666: $loadavg =~ s/\s.*//g;
667: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
668: print $client "$loadpercent\n";
669: # ----------------------------------------------------------------- currentauth
670: } elsif ($userinput =~ /^currentauth/) {
671: if ($wasenc==1) {
672: my ($cmd,$udom,$uname)=split(/:/,$userinput);
673: my $result = GetAuthType($udom, $uname);
674: if($result eq "nouser") {
675: print $client "unknown_user\n";
676: }
677: else {
678: print $client "$result\n"
679: }
680: } else {
681: print $client "refused\n";
682: }
683: # ------------------------------------------------------------------------ auth
684: } elsif ($userinput =~ /^auth/) {
685: if ($wasenc==1) {
686: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
687: chomp($upass);
688: $upass=unescape($upass);
689: my $proname=propath($udom,$uname);
690: my $passfilename="$proname/passwd";
691: if (-e $passfilename) {
692: my $pf = IO::File->new($passfilename);
693: my $realpasswd=<$pf>;
694: chomp($realpasswd);
695: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
696: my $pwdcorrect=0;
697: if ($howpwd eq 'internal') {
698: &Debug("Internal auth");
699: $pwdcorrect=
700: (crypt($upass,$contentpwd) eq $contentpwd);
701: } elsif ($howpwd eq 'unix') {
702: &Debug("Unix auth");
703: if((getpwnam($uname))[1] eq "") { #no such user!
704: $pwdcorrect = 0;
705: } else {
706: $contentpwd=(getpwnam($uname))[1];
707: my $pwauth_path="/usr/local/sbin/pwauth";
708: unless ($contentpwd eq 'x') {
709: $pwdcorrect=
710: (crypt($upass,$contentpwd) eq
711: $contentpwd);
712: }
713:
714: elsif (-e $pwauth_path) {
715: open PWAUTH, "|$pwauth_path" or
716: die "Cannot invoke authentication";
717: print PWAUTH "$uname\n$upass\n";
718: close PWAUTH;
719: $pwdcorrect=!$?;
720: }
721: }
722: } elsif ($howpwd eq 'krb4') {
723: $null=pack("C",0);
724: unless ($upass=~/$null/) {
725: $pwdcorrect=(
726: Authen::Krb4::get_pw_in_tkt($uname,"",
727: $contentpwd,'krbtgt',$contentpwd,1,
728: $upass) == 0);
729: } else { $pwdcorrect=0; }
730: } elsif ($howpwd eq 'krb5') {
731: $null=pack("C",0);
732: unless ($upass=~/$null/) {
733: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
734: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
735: my $krbserver=&Authen::Krb5::parse_name($krbservice);
736: my $credentials=&Authen::Krb5::cc_default();
737: $credentials->initialize($krbclient);
738: my $krbreturn =
739: &Authen::Krb5::get_in_tkt_with_password(
740: $krbclient,$krbserver,$upass,$credentials);
741: # unless ($krbreturn) {
742: # &logthis("Krb5 Error: ".
743: # &Authen::Krb5::error());
744: # }
745: $pwdcorrect = ($krbreturn == 1);
746: } else { $pwdcorrect=0; }
747: } elsif ($howpwd eq 'localauth') {
748: $pwdcorrect=&localauth::localauth($uname,$upass,
749: $contentpwd);
750: }
751: if ($pwdcorrect) {
752: print $client "authorized\n";
753: } else {
754: print $client "non_authorized\n";
755: }
756: } else {
757: print $client "unknown_user\n";
758: }
759: } else {
760: print $client "refused\n";
761: }
762: # ---------------------------------------------------------------------- passwd
763: } elsif ($userinput =~ /^passwd/) {
764: if ($wasenc==1) {
765: my
766: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
767: chomp($npass);
768: $upass=&unescape($upass);
769: $npass=&unescape($npass);
770: &Debug("Trying to change password for $uname");
771: my $proname=propath($udom,$uname);
772: my $passfilename="$proname/passwd";
773: if (-e $passfilename) {
774: my $realpasswd;
775: { my $pf = IO::File->new($passfilename);
776: $realpasswd=<$pf>; }
777: chomp($realpasswd);
778: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
779: if ($howpwd eq 'internal') {
780: &Debug("internal auth");
781: if (crypt($upass,$contentpwd) eq $contentpwd) {
782: my $salt=time;
783: $salt=substr($salt,6,2);
784: my $ncpass=crypt($npass,$salt);
785: { my $pf = IO::File->new(">$passfilename");
786: print $pf "internal:$ncpass\n"; }
787: &logthis("Result of password change for $uname: pwchange_success");
788: print $client "ok\n";
789: } else {
790: print $client "non_authorized\n";
791: }
792: } elsif ($howpwd eq 'unix') {
793: # Unix means we have to access /etc/password
794: # one way or another.
795: # First: Make sure the current password is
796: # correct
797: &Debug("auth is unix");
798: $contentpwd=(getpwnam($uname))[1];
799: my $pwdcorrect = "0";
800: my $pwauth_path="/usr/local/sbin/pwauth";
801: unless ($contentpwd eq 'x') {
802: $pwdcorrect=
803: (crypt($upass,$contentpwd) eq $contentpwd);
804: } elsif (-e $pwauth_path) {
805: open PWAUTH, "|$pwauth_path" or
806: die "Cannot invoke authentication";
807: print PWAUTH "$uname\n$upass\n";
808: close PWAUTH;
809: &Debug("exited pwauth with $? ($uname,$upass) ");
810: $pwdcorrect=($? == 0);
811: }
812: if ($pwdcorrect) {
813: my $execdir=$perlvar{'lonDaemons'};
814: &Debug("Opening lcpasswd pipeline");
815: my $pf = IO::File->new("|$execdir/lcpasswd > /home/www/lcpasswd.log");
816: print $pf "$uname\n$npass\n$npass\n";
817: close $pf;
818: my $err = $?;
819: my $result = ($err>0 ? 'pwchange_failure'
820: : 'ok');
821: &logthis("Result of password change for $uname: ".
822: &lcpasswdstrerror($?));
823: print $client "$result\n";
824: } else {
825: print $client "non_authorized\n";
826: }
827: } else {
828: print $client "auth_mode_error\n";
829: }
830: } else {
831: print $client "unknown_user\n";
832: }
833: } else {
834: print $client "refused\n";
835: }
836: # -------------------------------------------------------------------- makeuser
837: } elsif ($userinput =~ /^makeuser/) {
838: &Debug("Make user received");
839: my $oldumask=umask(0077);
840: if ($wasenc==1) {
841: my
842: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
843: &Debug("cmd =".$cmd." $udom =".$udom.
844: " uname=".$uname);
845: chomp($npass);
846: $npass=&unescape($npass);
847: my $proname=propath($udom,$uname);
848: my $passfilename="$proname/passwd";
849: &Debug("Password file created will be:".
850: $passfilename);
851: if (-e $passfilename) {
852: print $client "already_exists\n";
853: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
854: print $client "not_right_domain\n";
855: } else {
856: @fpparts=split(/\//,$proname);
857: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
858: $fperror='';
859: for ($i=3;$i<=$#fpparts;$i++) {
860: $fpnow.='/'.$fpparts[$i];
861: unless (-e $fpnow) {
862: unless (mkdir($fpnow,0777)) {
863: $fperror="error:$!";
864: }
865: }
866: }
867: unless ($fperror) {
868: my $result=&make_passwd_file($uname, $umode,$npass,
869: $passfilename);
870: print $client $result;
871: } else {
872: print $client "$fperror\n";
873: }
874: }
875: } else {
876: print $client "refused\n";
877: }
878: umask($oldumask);
879: # -------------------------------------------------------------- changeuserauth
880: } elsif ($userinput =~ /^changeuserauth/) {
881: &Debug("Changing authorization");
882: if ($wasenc==1) {
883: my
884: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
885: chomp($npass);
886: &Debug("cmd = ".$cmd." domain= ".$udom.
887: "uname =".$uname." umode= ".$umode);
888: $npass=&unescape($npass);
889: my $proname=&propath($udom,$uname);
890: my $passfilename="$proname/passwd";
891: if ($udom ne $perlvar{'lonDefDomain'}) {
892: print $client "not_right_domain\n";
893: } else {
894: my $result=&make_passwd_file($uname, $umode,$npass,
895: $passfilename);
896: print $client $result;
897: }
898: } else {
899: print $client "refused\n";
900: }
901: # ------------------------------------------------------------------------ home
902: } elsif ($userinput =~ /^home/) {
903: my ($cmd,$udom,$uname)=split(/:/,$userinput);
904: chomp($uname);
905: my $proname=propath($udom,$uname);
906: if (-e $proname) {
907: print $client "found\n";
908: } else {
909: print $client "not_found\n";
910: }
911: # ---------------------------------------------------------------------- update
912: } elsif ($userinput =~ /^update/) {
913: my ($cmd,$fname)=split(/:/,$userinput);
914: my $ownership=ishome($fname);
915: if ($ownership eq 'not_owner') {
916: if (-e $fname) {
917: my ($dev,$ino,$mode,$nlink,
918: $uid,$gid,$rdev,$size,
919: $atime,$mtime,$ctime,
920: $blksize,$blocks)=stat($fname);
921: $now=time;
922: $since=$now-$atime;
923: if ($since>$perlvar{'lonExpire'}) {
924: $reply=
925: reply("unsub:$fname","$hostid{$clientip}");
926: unlink("$fname");
927: } else {
928: my $transname="$fname.in.transfer";
929: my $remoteurl=
930: reply("sub:$fname","$hostid{$clientip}");
931: my $response;
932: {
933: my $ua=new LWP::UserAgent;
934: my $request=new HTTP::Request('GET',"$remoteurl");
935: $response=$ua->request($request,$transname);
936: }
937: if ($response->is_error()) {
938: unlink($transname);
939: my $message=$response->status_line;
940: &logthis(
941: "LWP GET: $message for $fname ($remoteurl)");
942: } else {
943: if ($remoteurl!~/\.meta$/) {
944: my $ua=new LWP::UserAgent;
945: my $mrequest=
946: new HTTP::Request('GET',$remoteurl.'.meta');
947: my $mresponse=
948: $ua->request($mrequest,$fname.'.meta');
949: if ($mresponse->is_error()) {
950: unlink($fname.'.meta');
951: }
952: }
953: rename($transname,$fname);
954: }
955: }
956: print $client "ok\n";
957: } else {
958: print $client "not_found\n";
959: }
960: } else {
961: print $client "rejected\n";
962: }
963: # -------------------------------------- fetch a user file from a remote server
964: } elsif ($userinput =~ /^fetchuserfile/) {
965: my ($cmd,$fname)=split(/:/,$userinput);
966: my ($udom,$uname,$ufile)=split(/\//,$fname);
967: my $udir=propath($udom,$uname).'/userfiles';
968: unless (-e $udir) { mkdir($udir,0770); }
969: if (-e $udir) {
970: $ufile=~s/^[\.\~]+//;
971: $ufile=~s/\///g;
972: my $transname=$udir.'/'.$ufile;
973: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
974: my $response;
975: {
976: my $ua=new LWP::UserAgent;
977: my $request=new HTTP::Request('GET',"$remoteurl");
978: $response=$ua->request($request,$transname);
979: }
980: if ($response->is_error()) {
981: unlink($transname);
982: my $message=$response->status_line;
983: &logthis(
984: "LWP GET: $message for $fname ($remoteurl)");
985: print $client "failed\n";
986: } else {
987: print $client "ok\n";
988: }
989: } else {
990: print $client "not_home\n";
991: }
992: # ------------------------------------------ authenticate access to a user file
993: } elsif ($userinput =~ /^tokenauthuserfile/) {
994: my ($cmd,$fname,$session)=split(/:/,$userinput);
995: chomp($session);
996: $reply='non_auth';
997: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
998: $session.'.id')) {
999: while ($line=<ENVIN>) {
1000: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1001: }
1002: close(ENVIN);
1003: print $client $reply."\n";
1004: } else {
1005: print $client "invalid_token\n";
1006: }
1007: # ----------------------------------------------------------------- unsubscribe
1008: } elsif ($userinput =~ /^unsub/) {
1009: my ($cmd,$fname)=split(/:/,$userinput);
1010: if (-e $fname) {
1011: print $client &unsub($client,$fname,$clientip);
1012: } else {
1013: print $client "not_found\n";
1014: }
1015: # ------------------------------------------------------------------- subscribe
1016: } elsif ($userinput =~ /^sub/) {
1017: print $client &subscribe($userinput,$clientip);
1018: # ------------------------------------------------------------------------- log
1019: } elsif ($userinput =~ /^log/) {
1020: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1021: chomp($what);
1022: my $proname=propath($udom,$uname);
1023: my $now=time;
1024: {
1025: my $hfh;
1026: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1027: print $hfh "$now:$hostid{$clientip}:$what\n";
1028: print $client "ok\n";
1029: } else {
1030: print $client "error:$!\n";
1031: }
1032: }
1033: # ------------------------------------------------------------------------- put
1034: } elsif ($userinput =~ /^put/) {
1035: my ($cmd,$udom,$uname,$namespace,$what)
1036: =split(/:/,$userinput);
1037: $namespace=~s/\//\_/g;
1038: $namespace=~s/\W//g;
1039: if ($namespace ne 'roles') {
1040: chomp($what);
1041: my $proname=propath($udom,$uname);
1042: my $now=time;
1043: unless ($namespace=~/^nohist\_/) {
1044: my $hfh;
1045: if (
1046: $hfh=IO::File->new(">>$proname/$namespace.hist")
1047: ) { print $hfh "P:$now:$what\n"; }
1048: }
1049: my @pairs=split(/\&/,$what);
1050: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1051: foreach $pair (@pairs) {
1052: ($key,$value)=split(/=/,$pair);
1053: $hash{$key}=$value;
1054: }
1055: if (untie(%hash)) {
1056: print $client "ok\n";
1057: } else {
1058: print $client "error:$!\n";
1059: }
1060: } else {
1061: print $client "error:$!\n";
1062: }
1063: } else {
1064: print $client "refused\n";
1065: }
1066: # -------------------------------------------------------------------- rolesput
1067: } elsif ($userinput =~ /^rolesput/) {
1068: &Debug("rolesput");
1069: if ($wasenc==1) {
1070: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1071: =split(/:/,$userinput);
1072: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1073: "user = ".$exeuser." udom=".$udom.
1074: "what = ".$what);
1075: my $namespace='roles';
1076: chomp($what);
1077: my $proname=propath($udom,$uname);
1078: my $now=time;
1079: {
1080: my $hfh;
1081: if (
1082: $hfh=IO::File->new(">>$proname/$namespace.hist")
1083: ) {
1084: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1085: }
1086: }
1087: my @pairs=split(/\&/,$what);
1088: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1089: foreach $pair (@pairs) {
1090: ($key,$value)=split(/=/,$pair);
1091: &ManagePermissions($key, $udom, $uname,
1092: &GetAuthType( $udom,
1093: $uname));
1094: $hash{$key}=$value;
1095:
1096: }
1097: if (untie(%hash)) {
1098: print $client "ok\n";
1099: } else {
1100: print $client "error:$!\n";
1101: }
1102: } else {
1103: print $client "error:$!\n";
1104: }
1105: } else {
1106: print $client "refused\n";
1107: }
1108: # ------------------------------------------------------------------------- get
1109: } elsif ($userinput =~ /^get/) {
1110: my ($cmd,$udom,$uname,$namespace,$what)
1111: =split(/:/,$userinput);
1112: $namespace=~s/\//\_/g;
1113: $namespace=~s/\W//g;
1114: chomp($what);
1115: my @queries=split(/\&/,$what);
1116: my $proname=propath($udom,$uname);
1117: my $qresult='';
1118: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1119: for ($i=0;$i<=$#queries;$i++) {
1120: $qresult.="$hash{$queries[$i]}&";
1121: }
1122: if (untie(%hash)) {
1123: $qresult=~s/\&$//;
1124: print $client "$qresult\n";
1125: } else {
1126: print $client "error:$!\n";
1127: }
1128: } else {
1129: print $client "error:$!\n";
1130: }
1131: # ------------------------------------------------------------------------ eget
1132: } elsif ($userinput =~ /^eget/) {
1133: my ($cmd,$udom,$uname,$namespace,$what)
1134: =split(/:/,$userinput);
1135: $namespace=~s/\//\_/g;
1136: $namespace=~s/\W//g;
1137: chomp($what);
1138: my @queries=split(/\&/,$what);
1139: my $proname=propath($udom,$uname);
1140: my $qresult='';
1141: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1142: for ($i=0;$i<=$#queries;$i++) {
1143: $qresult.="$hash{$queries[$i]}&";
1144: }
1145: if (untie(%hash)) {
1146: $qresult=~s/\&$//;
1147: if ($cipher) {
1148: my $cmdlength=length($qresult);
1149: $qresult.=" ";
1150: my $encqresult='';
1151: for
1152: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1153: $encqresult.=
1154: unpack("H16",
1155: $cipher->encrypt(substr($qresult,$encidx,8)));
1156: }
1157: print $client "enc:$cmdlength:$encqresult\n";
1158: } else {
1159: print $client "error:no_key\n";
1160: }
1161: } else {
1162: print $client "error:$!\n";
1163: }
1164: } else {
1165: print $client "error:$!\n";
1166: }
1167: # ------------------------------------------------------------------------- del
1168: } elsif ($userinput =~ /^del/) {
1169: my ($cmd,$udom,$uname,$namespace,$what)
1170: =split(/:/,$userinput);
1171: $namespace=~s/\//\_/g;
1172: $namespace=~s/\W//g;
1173: chomp($what);
1174: my $proname=propath($udom,$uname);
1175: my $now=time;
1176: unless ($namespace=~/^nohist\_/) {
1177: my $hfh;
1178: if (
1179: $hfh=IO::File->new(">>$proname/$namespace.hist")
1180: ) { print $hfh "D:$now:$what\n"; }
1181: }
1182: my @keys=split(/\&/,$what);
1183: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1184: foreach $key (@keys) {
1185: delete($hash{$key});
1186: }
1187: if (untie(%hash)) {
1188: print $client "ok\n";
1189: } else {
1190: print $client "error:$!\n";
1191: }
1192: } else {
1193: print $client "error:$!\n";
1194: }
1195: # ------------------------------------------------------------------------ keys
1196: } elsif ($userinput =~ /^keys/) {
1197: my ($cmd,$udom,$uname,$namespace)
1198: =split(/:/,$userinput);
1199: $namespace=~s/\//\_/g;
1200: $namespace=~s/\W//g;
1201: my $proname=propath($udom,$uname);
1202: my $qresult='';
1203: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1204: foreach $key (keys %hash) {
1205: $qresult.="$key&";
1206: }
1207: if (untie(%hash)) {
1208: $qresult=~s/\&$//;
1209: print $client "$qresult\n";
1210: } else {
1211: print $client "error:$!\n";
1212: }
1213: } else {
1214: print $client "error:$!\n";
1215: }
1216: # ------------------------------------------------------------------------ dump
1217: } elsif ($userinput =~ /^dump/) {
1218: my ($cmd,$udom,$uname,$namespace,$regexp)
1219: =split(/:/,$userinput);
1220: $namespace=~s/\//\_/g;
1221: $namespace=~s/\W//g;
1222: if (defined($regexp)) {
1223: $regexp=&unescape($regexp);
1224: } else {
1225: $regexp='.';
1226: }
1227: my $qresult='';
1228: my $proname=propath($udom,$uname);
1229: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1230: study($regexp);
1231: while (($key,$value) = each(%hash)) {
1232: if ($regexp eq '.') {
1233: $qresult.=$key.'='.$value.'&';
1234: } else {
1235: my $unescapeKey = &unescape($key);
1236: if (eval('$unescapeKey=~/$regexp/')) {
1237: $qresult.="$key=$value&";
1238: }
1239: }
1240: }
1241: if (untie(%hash)) {
1242: chop($qresult);
1243: print $client "$qresult\n";
1244: } else {
1245: print $client "error:$!\n";
1246: }
1247: } else {
1248: print $client "error:$!\n";
1249: }
1250: # ----------------------------------------------------------------------- store
1251: } elsif ($userinput =~ /^store/) {
1252: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1253: =split(/:/,$userinput);
1254: $namespace=~s/\//\_/g;
1255: $namespace=~s/\W//g;
1256: if ($namespace ne 'roles') {
1257: chomp($what);
1258: my $proname=propath($udom,$uname);
1259: my $now=time;
1260: unless ($namespace=~/^nohist\_/) {
1261: my $hfh;
1262: if (
1263: $hfh=IO::File->new(">>$proname/$namespace.hist")
1264: ) { print $hfh "P:$now:$rid:$what\n"; }
1265: }
1266: my @pairs=split(/\&/,$what);
1267:
1268: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1269: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1270: my $key;
1271: $hash{"version:$rid"}++;
1272: my $version=$hash{"version:$rid"};
1273: my $allkeys='';
1274: foreach $pair (@pairs) {
1275: ($key,$value)=split(/=/,$pair);
1276: $allkeys.=$key.':';
1277: $hash{"$version:$rid:$key"}=$value;
1278: }
1279: $hash{"$version:$rid:timestamp"}=$now;
1280: $allkeys.='timestamp';
1281: $hash{"$version:keys:$rid"}=$allkeys;
1282: if (untie(%hash)) {
1283: print $client "ok\n";
1284: } else {
1285: print $client "error:$!\n";
1286: }
1287: } else {
1288: print $client "error:$!\n";
1289: }
1290: } else {
1291: print $client "refused\n";
1292: }
1293: # --------------------------------------------------------------------- restore
1294: } elsif ($userinput =~ /^restore/) {
1295: my ($cmd,$udom,$uname,$namespace,$rid)
1296: =split(/:/,$userinput);
1297: $namespace=~s/\//\_/g;
1298: $namespace=~s/\W//g;
1299: chomp($rid);
1300: my $proname=propath($udom,$uname);
1301: my $qresult='';
1302: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1303: my $version=$hash{"version:$rid"};
1304: $qresult.="version=$version&";
1305: my $scope;
1306: for ($scope=1;$scope<=$version;$scope++) {
1307: my $vkeys=$hash{"$scope:keys:$rid"};
1308: my @keys=split(/:/,$vkeys);
1309: my $key;
1310: $qresult.="$scope:keys=$vkeys&";
1311: foreach $key (@keys) {
1312: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1313: }
1314: }
1315: if (untie(%hash)) {
1316: $qresult=~s/\&$//;
1317: print $client "$qresult\n";
1318: } else {
1319: print $client "error:$!\n";
1320: }
1321: } else {
1322: print $client "error:$!\n";
1323: }
1324: # -------------------------------------------------------------------- chatsend
1325: } elsif ($userinput =~ /^chatsend/) {
1326: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1327: &chatadd($cdom,$cnum,$newpost);
1328: print $client "ok\n";
1329: # -------------------------------------------------------------------- chatretr
1330: } elsif ($userinput =~ /^chatretr/) {
1331: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1332: my $reply='';
1333: foreach (&getchat($cdom,$cnum)) {
1334: $reply.=&escape($_).':';
1335: }
1336: $reply=~s/\:$//;
1337: print $client $reply."\n";
1338: # ------------------------------------------------------------------- querysend
1339: } elsif ($userinput =~ /^querysend/) {
1340: my ($cmd,$query,
1341: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1342: $query=~s/\n*$//g;
1343: print $client "".
1344: sqlreply("$hostid{$clientip}\&$query".
1345: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1346: # ------------------------------------------------------------------ queryreply
1347: } elsif ($userinput =~ /^queryreply/) {
1348: my ($cmd,$id,$reply)=split(/:/,$userinput);
1349: my $store;
1350: my $execdir=$perlvar{'lonDaemons'};
1351: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1352: $reply=~s/\&/\n/g;
1353: print $store $reply;
1354: close $store;
1355: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1356: print $store2 "done\n";
1357: close $store2;
1358: print $client "ok\n";
1359: }
1360: else {
1361: print $client "error:$!\n";
1362: }
1363: # ----------------------------------------------------------------------- idput
1364: } elsif ($userinput =~ /^idput/) {
1365: my ($cmd,$udom,$what)=split(/:/,$userinput);
1366: chomp($what);
1367: $udom=~s/\W//g;
1368: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1369: my $now=time;
1370: {
1371: my $hfh;
1372: if (
1373: $hfh=IO::File->new(">>$proname.hist")
1374: ) { print $hfh "P:$now:$what\n"; }
1375: }
1376: my @pairs=split(/\&/,$what);
1377: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1378: foreach $pair (@pairs) {
1379: ($key,$value)=split(/=/,$pair);
1380: $hash{$key}=$value;
1381: }
1382: if (untie(%hash)) {
1383: print $client "ok\n";
1384: } else {
1385: print $client "error:$!\n";
1386: }
1387: } else {
1388: print $client "error:$!\n";
1389: }
1390: # ----------------------------------------------------------------------- idget
1391: } elsif ($userinput =~ /^idget/) {
1392: my ($cmd,$udom,$what)=split(/:/,$userinput);
1393: chomp($what);
1394: $udom=~s/\W//g;
1395: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1396: my @queries=split(/\&/,$what);
1397: my $qresult='';
1398: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1399: for ($i=0;$i<=$#queries;$i++) {
1400: $qresult.="$hash{$queries[$i]}&";
1401: }
1402: if (untie(%hash)) {
1403: $qresult=~s/\&$//;
1404: print $client "$qresult\n";
1405: } else {
1406: print $client "error:$!\n";
1407: }
1408: } else {
1409: print $client "error:$!\n";
1410: }
1411: # ---------------------------------------------------------------------- tmpput
1412: } elsif ($userinput =~ /^tmpput/) {
1413: my ($cmd,$what)=split(/:/,$userinput);
1414: my $store;
1415: $tmpsnum++;
1416: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1417: $id=~s/\W/\_/g;
1418: $what=~s/\n//g;
1419: my $execdir=$perlvar{'lonDaemons'};
1420: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1421: print $store $what;
1422: close $store;
1423: print $client "$id\n";
1424: }
1425: else {
1426: print $client "error:$!\n";
1427: }
1428:
1429: # ---------------------------------------------------------------------- tmpget
1430: } elsif ($userinput =~ /^tmpget/) {
1431: my ($cmd,$id)=split(/:/,$userinput);
1432: chomp($id);
1433: $id=~s/\W/\_/g;
1434: my $store;
1435: my $execdir=$perlvar{'lonDaemons'};
1436: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1437: my $reply=<$store>;
1438: print $client "$reply\n";
1439: close $store;
1440: }
1441: else {
1442: print $client "error:$!\n";
1443: }
1444:
1445: # -------------------------------------------------------------------------- ls
1446: } elsif ($userinput =~ /^ls/) {
1447: my ($cmd,$ulsdir)=split(/:/,$userinput);
1448: my $ulsout='';
1449: my $ulsfn;
1450: if (-e $ulsdir) {
1451: if(-d $ulsdir) {
1452: if (opendir(LSDIR,$ulsdir)) {
1453: while ($ulsfn=readdir(LSDIR)) {
1454: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1455: $ulsout.=$ulsfn.'&'.
1456: join('&',@ulsstats).':';
1457: }
1458: closedir(LSDIR);
1459: }
1460: } else {
1461: my @ulsstats=stat($ulsdir);
1462: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1463: }
1464: } else {
1465: $ulsout='no_such_dir';
1466: }
1467: if ($ulsout eq '') { $ulsout='empty'; }
1468: print $client "$ulsout\n";
1469: # ------------------------------------------------------------------ Hanging up
1470: } elsif (($userinput =~ /^exit/) ||
1471: ($userinput =~ /^init/)) {
1472: &logthis(
1473: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1474: print $client "bye\n";
1475: $client->close();
1476: last;
1477: # ------------------------------------------------------------- unknown command
1478: } else {
1479: # unknown command
1480: print $client "unknown_cmd\n";
1481: }
1482: # -------------------------------------------------------------------- complete
1483: alarm(0);
1484: &status('Listening to '.$hostid{$clientip});
1485: }
1486: # --------------------------------------------- client unknown or fishy, refuse
1487: } else {
1488: print $client "refused\n";
1489: $client->close();
1490: &logthis("<font color=blue>WARNING: "
1491: ."Rejected client $clientip, closing connection</font>");
1492: }
1493: }
1494:
1495: # =============================================================================
1496:
1497: &logthis("<font color=red>CRITICAL: "
1498: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1499: # tidy up gracefully and finish
1500:
1501: $server->close();
1502:
1503: # this exit is VERY important, otherwise the child will become
1504: # a producer of more and more children, forking yourself into
1505: # process death.
1506: exit;
1507: }
1508: }
1509:
1510:
1511: #
1512: # Checks to see if the input roleput request was to set
1513: # an author role. If so, invokes the lchtmldir script to set
1514: # up a correct public_html
1515: # Parameters:
1516: # request - The request sent to the rolesput subchunk.
1517: # We're looking for /domain/_au
1518: # domain - The domain in which the user is having roles doctored.
1519: # user - Name of the user for which the role is being put.
1520: # authtype - The authentication type associated with the user.
1521: #
1522: sub ManagePermissions
1523: {
1524: my $request = shift;
1525: my $domain = shift;
1526: my $user = shift;
1527: my $authtype= shift;
1528:
1529: # See if the request is of the form /$domain/_au
1530:
1531: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1532: my $execdir = $perlvar{'lonDaemons'};
1533: my $userhome= "/home/$user" ;
1534: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1535: system("$execdir/lchtmldir $userhome $user $authtype");
1536: }
1537: }
1538: #
1539: # GetAuthType - Determines the authorization type of a user in a domain.
1540:
1541: # Returns the authorization type or nouser if there is no such user.
1542: #
1543: sub GetAuthType
1544: {
1545: my $domain = shift;
1546: my $user = shift;
1547:
1548: Debug("GetAuthType( $domain, $user ) \n");
1549: my $proname = &propath($domain, $user);
1550: my $passwdfile = "$proname/passwd";
1551: if( -e $passwdfile ) {
1552: my $pf = IO::File->new($passwdfile);
1553: my $realpassword = <$pf>;
1554: chomp($realpassword);
1555: Debug("Password info = $realpassword\n");
1556: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1557: Debug("Authtype = $authtype, content = $contentpwd\n");
1558: my $availinfo = '';
1559: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1560: $availinfo = $contentpwd;
1561: }
1562:
1563: return "$authtype:$availinfo";
1564: }
1565: else {
1566: Debug("Returning nouser");
1567: return "nouser";
1568: }
1569: }
1570:
1571: sub addline {
1572: my ($fname,$hostid,$ip,$newline)=@_;
1573: my $contents;
1574: my $found=0;
1575: my $expr='^'.$hostid.':'.$ip.':';
1576: $expr =~ s/\./\\\./g;
1577: if ($sh=IO::File->new("$fname.subscription")) {
1578: while (my $subline=<$sh>) {
1579: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1580: }
1581: $sh->close();
1582: }
1583: $sh=IO::File->new(">$fname.subscription");
1584: if ($contents) { print $sh $contents; }
1585: if ($newline) { print $sh $newline; }
1586: $sh->close();
1587: return $found;
1588: }
1589:
1590: sub getchat {
1591: my ($cdom,$cname)=@_;
1592: my %hash;
1593: my $proname=&propath($cdom,$cname);
1594: my @entries=();
1595: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1596: &GDBM_READER(),0640)) {
1597: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1598: untie %hash;
1599: }
1600: return @entries;
1601: }
1602:
1603: sub chatadd {
1604: my ($cdom,$cname,$newchat)=@_;
1605: my %hash;
1606: my $proname=&propath($cdom,$cname);
1607: my @entries=();
1608: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1609: &GDBM_WRCREAT(),0640)) {
1610: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1611: my $time=time;
1612: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1613: my ($thentime,$idnum)=split(/\_/,$lastid);
1614: my $newid=$time.'_000000';
1615: if ($thentime==$time) {
1616: $idnum=~s/^0+//;
1617: $idnum++;
1618: $idnum=substr('000000'.$idnum,-6,6);
1619: $newid=$time.'_'.$idnum;
1620: }
1621: $hash{$newid}=$newchat;
1622: my $expired=$time-3600;
1623: foreach (keys %hash) {
1624: my ($thistime)=($_=~/(\d+)\_/);
1625: if ($thistime<$expired) {
1626: delete $hash{$_};
1627: }
1628: }
1629: untie %hash;
1630: }
1631: }
1632:
1633: sub unsub {
1634: my ($fname,$clientip)=@_;
1635: my $result;
1636: if (unlink("$fname.$hostid{$clientip}")) {
1637: $result="ok\n";
1638: } else {
1639: $result="not_subscribed\n";
1640: }
1641: if (-e "$fname.subscription") {
1642: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1643: if ($found) { $result="ok\n"; }
1644: } else {
1645: if ($result != "ok\n") { $result="not_subscribed\n"; }
1646: }
1647: return $result;
1648: }
1649:
1650: sub subscribe {
1651: my ($userinput,$clientip)=@_;
1652: my $result;
1653: my ($cmd,$fname)=split(/:/,$userinput);
1654: my $ownership=&ishome($fname);
1655: if ($ownership eq 'owner') {
1656: if (-e $fname) {
1657: if (-d $fname) {
1658: $result="directory\n";
1659: } else {
1660: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1661: $now=time;
1662: my $found=&addline($fname,$hostid{$clientip},$clientip,
1663: "$hostid{$clientip}:$clientip:$now\n");
1664: if ($found) { $result="$fname\n"; }
1665: # if they were subscribed to only meta data, delete that
1666: # subscription, when you subscribe to a file you also get
1667: # the metadata
1668: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1669: $fname=~s/\/home\/httpd\/html\/res/raw/;
1670: $fname="http://$thisserver/".$fname;
1671: $result="$fname\n";
1672: }
1673: } else {
1674: $result="not_found\n";
1675: }
1676: } else {
1677: $result="rejected\n";
1678: }
1679: return $result;
1680: }
1681:
1682: sub make_passwd_file {
1683: my ($uname, $umode,$npass,$passfilename)=@_;
1684: my $result="ok\n";
1685: if ($umode eq 'krb4' or $umode eq 'krb5') {
1686: {
1687: my $pf = IO::File->new(">$passfilename");
1688: print $pf "$umode:$npass\n";
1689: }
1690: } elsif ($umode eq 'internal') {
1691: my $salt=time;
1692: $salt=substr($salt,6,2);
1693: my $ncpass=crypt($npass,$salt);
1694: {
1695: &Debug("Creating internal auth");
1696: my $pf = IO::File->new(">$passfilename");
1697: print $pf "internal:$ncpass\n";
1698: }
1699: } elsif ($umode eq 'localauth') {
1700: {
1701: my $pf = IO::File->new(">$passfilename");
1702: print $pf "localauth:$npass\n";
1703: }
1704: } elsif ($umode eq 'unix') {
1705: {
1706: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1707: {
1708: &Debug("Executing external: ".$execpath);
1709: &Debug("user = ".$uname.", Password =". $npass);
1710: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
1711: print $se "$uname\n";
1712: print $se "$npass\n";
1713: print $se "$npass\n";
1714: }
1715: my $useraddok = $?;
1716: if($useraddok > 0) {
1717: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1718: }
1719: my $pf = IO::File->new(">$passfilename");
1720: print $pf "unix:\n";
1721: }
1722: } elsif ($umode eq 'none') {
1723: {
1724: my $pf = IO::File->new(">$passfilename");
1725: print $pf "none:\n";
1726: }
1727: } else {
1728: $result="auth_mode_error\n";
1729: }
1730: return $result;
1731: }
1732:
1733: # ----------------------------------- POD (plain old documentation, CPAN style)
1734:
1735: =head1 NAME
1736:
1737: lond - "LON Daemon" Server (port "LOND" 5663)
1738:
1739: =head1 SYNOPSIS
1740:
1741: Usage: B<lond>
1742:
1743: Should only be run as user=www. This is a command-line script which
1744: is invoked by B<loncron>. There is no expectation that a typical user
1745: will manually start B<lond> from the command-line. (In other words,
1746: DO NOT START B<lond> YOURSELF.)
1747:
1748: =head1 DESCRIPTION
1749:
1750: There are two characteristics associated with the running of B<lond>,
1751: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1752: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1753: subscriptions, etc). These are described in two large
1754: sections below.
1755:
1756: B<PROCESS MANAGEMENT>
1757:
1758: Preforker - server who forks first. Runs as a daemon. HUPs.
1759: Uses IDEA encryption
1760:
1761: B<lond> forks off children processes that correspond to the other servers
1762: in the network. Management of these processes can be done at the
1763: parent process level or the child process level.
1764:
1765: B<logs/lond.log> is the location of log messages.
1766:
1767: The process management is now explained in terms of linux shell commands,
1768: subroutines internal to this code, and signal assignments:
1769:
1770: =over 4
1771:
1772: =item *
1773:
1774: PID is stored in B<logs/lond.pid>
1775:
1776: This is the process id number of the parent B<lond> process.
1777:
1778: =item *
1779:
1780: SIGTERM and SIGINT
1781:
1782: Parent signal assignment:
1783: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1784:
1785: Child signal assignment:
1786: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1787: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1788: to restart a new child.)
1789:
1790: Command-line invocations:
1791: B<kill> B<-s> SIGTERM I<PID>
1792: B<kill> B<-s> SIGINT I<PID>
1793:
1794: Subroutine B<HUNTSMAN>:
1795: This is only invoked for the B<lond> parent I<PID>.
1796: This kills all the children, and then the parent.
1797: The B<lonc.pid> file is cleared.
1798:
1799: =item *
1800:
1801: SIGHUP
1802:
1803: Current bug:
1804: This signal can only be processed the first time
1805: on the parent process. Subsequent SIGHUP signals
1806: have no effect.
1807:
1808: Parent signal assignment:
1809: $SIG{HUP} = \&HUPSMAN;
1810:
1811: Child signal assignment:
1812: none (nothing happens)
1813:
1814: Command-line invocations:
1815: B<kill> B<-s> SIGHUP I<PID>
1816:
1817: Subroutine B<HUPSMAN>:
1818: This is only invoked for the B<lond> parent I<PID>,
1819: This kills all the children, and then the parent.
1820: The B<lond.pid> file is cleared.
1821:
1822: =item *
1823:
1824: SIGUSR1
1825:
1826: Parent signal assignment:
1827: $SIG{USR1} = \&USRMAN;
1828:
1829: Child signal assignment:
1830: $SIG{USR1}= \&logstatus;
1831:
1832: Command-line invocations:
1833: B<kill> B<-s> SIGUSR1 I<PID>
1834:
1835: Subroutine B<USRMAN>:
1836: When invoked for the B<lond> parent I<PID>,
1837: SIGUSR1 is sent to all the children, and the status of
1838: each connection is logged.
1839:
1840: =item *
1841:
1842: SIGCHLD
1843:
1844: Parent signal assignment:
1845: $SIG{CHLD} = \&REAPER;
1846:
1847: Child signal assignment:
1848: none
1849:
1850: Command-line invocations:
1851: B<kill> B<-s> SIGCHLD I<PID>
1852:
1853: Subroutine B<REAPER>:
1854: This is only invoked for the B<lond> parent I<PID>.
1855: Information pertaining to the child is removed.
1856: The socket port is cleaned up.
1857:
1858: =back
1859:
1860: B<SERVER-SIDE ACTIVITIES>
1861:
1862: Server-side information can be accepted in an encrypted or non-encrypted
1863: method.
1864:
1865: =over 4
1866:
1867: =item ping
1868:
1869: Query a client in the hosts.tab table; "Are you there?"
1870:
1871: =item pong
1872:
1873: Respond to a ping query.
1874:
1875: =item ekey
1876:
1877: Read in encrypted key, make cipher. Respond with a buildkey.
1878:
1879: =item load
1880:
1881: Respond with CPU load based on a computation upon /proc/loadavg.
1882:
1883: =item currentauth
1884:
1885: Reply with current authentication information (only over an
1886: encrypted channel).
1887:
1888: =item auth
1889:
1890: Only over an encrypted channel, reply as to whether a user's
1891: authentication information can be validated.
1892:
1893: =item passwd
1894:
1895: Allow for a password to be set.
1896:
1897: =item makeuser
1898:
1899: Make a user.
1900:
1901: =item passwd
1902:
1903: Allow for authentication mechanism and password to be changed.
1904:
1905: =item home
1906:
1907: Respond to a question "are you the home for a given user?"
1908:
1909: =item update
1910:
1911: Update contents of a subscribed resource.
1912:
1913: =item unsubscribe
1914:
1915: The server is unsubscribing from a resource.
1916:
1917: =item subscribe
1918:
1919: The server is subscribing to a resource.
1920:
1921: =item log
1922:
1923: Place in B<logs/lond.log>
1924:
1925: =item put
1926:
1927: stores hash in namespace
1928:
1929: =item rolesput
1930:
1931: put a role into a user's environment
1932:
1933: =item get
1934:
1935: returns hash with keys from array
1936: reference filled in from namespace
1937:
1938: =item eget
1939:
1940: returns hash with keys from array
1941: reference filled in from namesp (encrypts the return communication)
1942:
1943: =item rolesget
1944:
1945: get a role from a user's environment
1946:
1947: =item del
1948:
1949: deletes keys out of array from namespace
1950:
1951: =item keys
1952:
1953: returns namespace keys
1954:
1955: =item dump
1956:
1957: dumps the complete (or key matching regexp) namespace into a hash
1958:
1959: =item store
1960:
1961: stores hash permanently
1962: for this url; hashref needs to be given and should be a \%hashname; the
1963: remaining args aren't required and if they aren't passed or are '' they will
1964: be derived from the ENV
1965:
1966: =item restore
1967:
1968: returns a hash for a given url
1969:
1970: =item querysend
1971:
1972: Tells client about the lonsql process that has been launched in response
1973: to a sent query.
1974:
1975: =item queryreply
1976:
1977: Accept information from lonsql and make appropriate storage in temporary
1978: file space.
1979:
1980: =item idput
1981:
1982: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
1983: for each student, defined perhaps by the institutional Registrar.)
1984:
1985: =item idget
1986:
1987: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
1988: for each student, defined perhaps by the institutional Registrar.)
1989:
1990: =item tmpput
1991:
1992: Accept and store information in temporary space.
1993:
1994: =item tmpget
1995:
1996: Send along temporarily stored information.
1997:
1998: =item ls
1999:
2000: List part of a user's directory.
2001:
2002: =item Hanging up (exit or init)
2003:
2004: What to do when a client tells the server that they (the client)
2005: are leaving the network.
2006:
2007: =item unknown command
2008:
2009: If B<lond> is sent an unknown command (not in the list above),
2010: it replys to the client "unknown_cmd".
2011:
2012: =item UNKNOWN CLIENT
2013:
2014: If the anti-spoofing algorithm cannot verify the client,
2015: the client is rejected (with a "refused" message sent
2016: to the client, and the connection is closed.
2017:
2018: =back
2019:
2020: =head1 PREREQUISITES
2021:
2022: IO::Socket
2023: IO::File
2024: Apache::File
2025: Symbol
2026: POSIX
2027: Crypt::IDEA
2028: LWP::UserAgent()
2029: GDBM_File
2030: Authen::Krb4
2031: Authen::Krb5
2032:
2033: =head1 COREQUISITES
2034:
2035: =head1 OSNAMES
2036:
2037: linux
2038:
2039: =head1 SCRIPT CATEGORIES
2040:
2041: Server/Process
2042:
2043: =cut
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