1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.111 2003/03/04 22:32:20 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: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 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: ###
54:
55:
56: use lib '/home/httpd/lib/perl/';
57: use LONCAPA::Configuration;
58:
59: use IO::Socket;
60: use IO::File;
61: use Apache::File;
62: use Symbol;
63: use POSIX;
64: use Crypt::IDEA;
65: use LWP::UserAgent();
66: use GDBM_File;
67: use Authen::Krb4;
68: use Authen::Krb5;
69: use lib '/home/httpd/lib/perl/';
70: use localauth;
71:
72: my $DEBUG = 0; # Non zero to enable debug log entries.
73:
74: my $status='';
75: my $lastlog='';
76:
77: #
78: # The array below are password error strings."
79: #
80: my $lastpwderror = 13; # Largest error number from lcpasswd.
81: my @passwderrors = ("ok",
82: "lcpasswd must be run as user 'www'",
83: "lcpasswd got incorrect number of arguments",
84: "lcpasswd did not get the right nubmer of input text lines",
85: "lcpasswd too many simultaneous pwd changes in progress",
86: "lcpasswd User does not exist.",
87: "lcpasswd Incorrect current passwd",
88: "lcpasswd Unable to su to root.",
89: "lcpasswd Cannot set new passwd.",
90: "lcpasswd Username has invalid characters",
91: "lcpasswd Invalid characters in password",
92: "11", "12",
93: "lcpasswd Password mismatch");
94:
95:
96: # The array below are lcuseradd error strings.:
97:
98: my $lastadderror = 13;
99: my @adderrors = ("ok",
100: "User ID mismatch, lcuseradd must run as user www",
101: "lcuseradd Incorrect number of command line parameters must be 3",
102: "lcuseradd Incorrect number of stdinput lines, must be 3",
103: "lcuseradd Too many other simultaneous pwd changes in progress",
104: "lcuseradd User does not exist",
105: "lcuseradd Unabel to mak ewww member of users's group",
106: "lcuseradd Unable to su to root",
107: "lcuseradd Unable to set password",
108: "lcuseradd Usrname has invbalid charcters",
109: "lcuseradd Password has an invalid character",
110: "lcuseradd User already exists",
111: "lcuseradd Could not add user.",
112: "lcuseradd Password mismatch");
113:
114:
115: #
116: # Convert an error return code from lcpasswd to a string value.
117: #
118: sub lcpasswdstrerror {
119: my $ErrorCode = shift;
120: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
121: return "lcpasswd Unrecognized error return value ".$ErrorCode;
122: } else {
123: return $passwderrors[$ErrorCode];
124: }
125: }
126:
127: #
128: # Convert an error return code from lcuseradd to a string value:
129: #
130: sub lcuseraddstrerror {
131: my $ErrorCode = shift;
132: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
133: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
134: } else {
135: return $adderrors[$ErrorCode];
136: }
137: }
138:
139: # grabs exception and records it to log before exiting
140: sub catchexception {
141: my ($error)=@_;
142: $SIG{'QUIT'}='DEFAULT';
143: $SIG{__DIE__}='DEFAULT';
144: &logthis("<font color=red>CRITICAL: "
145: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
146: ."a crash with this error msg->[$error]</font>");
147: &logthis('Famous last words: '.$status.' - '.$lastlog);
148: if ($client) { print $client "error: $error\n"; }
149: $server->close();
150: die($error);
151: }
152:
153: sub timeout {
154: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
155: &catchexception('Timeout');
156: }
157: # -------------------------------- Set signal handlers to record abnormal exits
158:
159: $SIG{'QUIT'}=\&catchexception;
160: $SIG{__DIE__}=\&catchexception;
161:
162: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
163: &status("Read loncapa.conf and loncapa_apache.conf");
164: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
165: my %perlvar=%{$perlvarref};
166: undef $perlvarref;
167:
168: # ----------------------------- Make sure this process is running from user=www
169: my $wwwid=getpwnam('www');
170: if ($wwwid!=$<) {
171: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
172: $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
173: system("echo 'User ID mismatch. lond must be run as user www.' |\
174: mailto $emailto -s '$subj' > /dev/null");
175: exit 1;
176: }
177:
178: # --------------------------------------------- Check if other instance running
179:
180: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
181:
182: if (-e $pidfile) {
183: my $lfh=IO::File->new("$pidfile");
184: my $pide=<$lfh>;
185: chomp($pide);
186: if (kill 0 => $pide) { die "already running"; }
187: }
188:
189: $PREFORK=4; # number of children to maintain, at least four spare
190:
191: # ------------------------------------------------------------- Read hosts file
192:
193: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
194:
195: while ($configline=<CONFIG>) {
196: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
197: chomp($ip); $ip=~s/\D+$//;
198: $hostid{$ip}=$id;
199: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
200: $PREFORK++;
201: }
202: close(CONFIG);
203:
204: # establish SERVER socket, bind and listen.
205: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
206: Type => SOCK_STREAM,
207: Proto => 'tcp',
208: Reuse => 1,
209: Listen => 10 )
210: or die "making socket: $@\n";
211:
212: # --------------------------------------------------------- Do global variables
213:
214: # global variables
215:
216: $MAX_CLIENTS_PER_CHILD = 50; # number of clients each child should
217: # process
218: %children = (); # keys are current child process IDs
219: $children = 0; # current number of children
220:
221: sub REAPER { # takes care of dead children
222: $SIG{CHLD} = \&REAPER;
223: my $pid = wait;
224: if (defined($children{$pid})) {
225: &logthis("Child $pid died");
226: $children --;
227: delete $children{$pid};
228: } else {
229: &logthis("Unknown Child $pid died");
230: }
231: }
232:
233: sub HUNTSMAN { # signal handler for SIGINT
234: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
235: kill 'INT' => keys %children;
236: &logthis("Free socket: ".shutdown($server,2)); # free up socket
237: my $execdir=$perlvar{'lonDaemons'};
238: unlink("$execdir/logs/lond.pid");
239: &logthis("<font color=red>CRITICAL: Shutting down</font>");
240: exit; # clean up with dignity
241: }
242:
243: sub HUPSMAN { # signal handler for SIGHUP
244: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
245: kill 'INT' => keys %children;
246: &logthis("Free socket: ".shutdown($server,2)); # free up socket
247: &logthis("<font color=red>CRITICAL: Restarting</font>");
248: unlink("$execdir/logs/lond.pid");
249: my $execdir=$perlvar{'lonDaemons'};
250: exec("$execdir/lond"); # here we go again
251: }
252:
253: sub checkchildren {
254: &initnewstatus();
255: &logstatus();
256: &logthis('Going to check on the children');
257: $docdir=$perlvar{'lonDocRoot'};
258: foreach (sort keys %children) {
259: sleep 1;
260: unless (kill 'USR1' => $_) {
261: &logthis ('Child '.$_.' is dead');
262: &logstatus($$.' is dead');
263: }
264: }
265: sleep 5;
266: foreach (sort keys %children) {
267: unless (-e "$docdir/lon-status/londchld/$_.txt") {
268: &logthis('Child '.$_.' did not respond');
269: kill 9 => $_;
270: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
271: $subj="LON: $perlvar{'lonHostID'} killed lond process $_";
272: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
273: $execdir=$perlvar{'lonDaemons'};
274: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`
275: }
276: }
277: }
278:
279: # --------------------------------------------------------------------- Logging
280:
281: sub logthis {
282: my $message=shift;
283: my $execdir=$perlvar{'lonDaemons'};
284: my $fh=IO::File->new(">>$execdir/logs/lond.log");
285: my $now=time;
286: my $local=localtime($now);
287: $lastlog=$local.': '.$message;
288: print $fh "$local ($$): $message\n";
289: }
290:
291: # ------------------------- Conditional log if $DEBUG true.
292: sub Debug {
293: my $message = shift;
294: if($DEBUG) {
295: &logthis($message);
296: }
297: }
298: # ------------------------------------------------------------------ Log status
299:
300: sub logstatus {
301: my $docdir=$perlvar{'lonDocRoot'};
302: {
303: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
304: print $fh $$."\t".$status."\t".$lastlog."\n";
305: $fh->close();
306: }
307: {
308: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
309: print $fh $status."\n".$lastlog."\n".time;
310: $fh->close();
311: }
312: }
313:
314: sub initnewstatus {
315: my $docdir=$perlvar{'lonDocRoot'};
316: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
317: my $now=time;
318: my $local=localtime($now);
319: print $fh "LOND status $local - parent $$\n\n";
320: opendir(DIR,"$docdir/lon-status/londchld");
321: while ($filename=readdir(DIR)) {
322: unlink("$docdir/lon-status/londchld/$filename");
323: }
324: closedir(DIR);
325: }
326:
327: # -------------------------------------------------------------- Status setting
328:
329: sub status {
330: my $what=shift;
331: my $now=time;
332: my $local=localtime($now);
333: $status=$local.': '.$what;
334: $0='lond: '.$what.' '.$local;
335: }
336:
337: # -------------------------------------------------------- Escape Special Chars
338:
339: sub escape {
340: my $str=shift;
341: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
342: return $str;
343: }
344:
345: # ----------------------------------------------------- Un-Escape Special Chars
346:
347: sub unescape {
348: my $str=shift;
349: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
350: return $str;
351: }
352:
353: # ----------------------------------------------------------- Send USR1 to lonc
354:
355: sub reconlonc {
356: my $peerfile=shift;
357: &logthis("Trying to reconnect for $peerfile");
358: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
359: if (my $fh=IO::File->new("$loncfile")) {
360: my $loncpid=<$fh>;
361: chomp($loncpid);
362: if (kill 0 => $loncpid) {
363: &logthis("lonc at pid $loncpid responding, sending USR1");
364: kill USR1 => $loncpid;
365: sleep 5;
366: if (-e "$peerfile") { return; }
367: &logthis("$peerfile still not there, give it another try");
368: sleep 10;
369: if (-e "$peerfile") { return; }
370: &logthis(
371: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
372: } else {
373: &logthis(
374: "<font color=red>CRITICAL: "
375: ."lonc at pid $loncpid not responding, giving up</font>");
376: }
377: } else {
378: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
379: }
380: }
381:
382: # -------------------------------------------------- Non-critical communication
383:
384: sub subreply {
385: my ($cmd,$server)=@_;
386: my $peerfile="$perlvar{'lonSockDir'}/$server";
387: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
388: Type => SOCK_STREAM,
389: Timeout => 10)
390: or return "con_lost";
391: print $sclient "$cmd\n";
392: my $answer=<$sclient>;
393: chomp($answer);
394: if (!$answer) { $answer="con_lost"; }
395: return $answer;
396: }
397:
398: sub reply {
399: my ($cmd,$server)=@_;
400: my $answer;
401: if ($server ne $perlvar{'lonHostID'}) {
402: $answer=subreply($cmd,$server);
403: if ($answer eq 'con_lost') {
404: $answer=subreply("ping",$server);
405: if ($answer ne $server) {
406: &logthis("sub reply: answer != server");
407: &reconlonc("$perlvar{'lonSockDir'}/$server");
408: }
409: $answer=subreply($cmd,$server);
410: }
411: } else {
412: $answer='self_reply';
413: }
414: return $answer;
415: }
416:
417: # -------------------------------------------------------------- Talk to lonsql
418:
419: sub sqlreply {
420: my ($cmd)=@_;
421: my $answer=subsqlreply($cmd);
422: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
423: return $answer;
424: }
425:
426: sub subsqlreply {
427: my ($cmd)=@_;
428: my $unixsock="mysqlsock";
429: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
430: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
431: Type => SOCK_STREAM,
432: Timeout => 10)
433: or return "con_lost";
434: print $sclient "$cmd\n";
435: my $answer=<$sclient>;
436: chomp($answer);
437: if (!$answer) { $answer="con_lost"; }
438: return $answer;
439: }
440:
441: # -------------------------------------------- Return path to profile directory
442:
443: sub propath {
444: my ($udom,$uname)=@_;
445: $udom=~s/\W//g;
446: $uname=~s/\W//g;
447: my $subdir=$uname.'__';
448: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
449: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
450: return $proname;
451: }
452:
453: # --------------------------------------- Is this the home server of an author?
454:
455: sub ishome {
456: my $author=shift;
457: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
458: my ($udom,$uname)=split(/\//,$author);
459: my $proname=propath($udom,$uname);
460: if (-e $proname) {
461: return 'owner';
462: } else {
463: return 'not_owner';
464: }
465: }
466:
467: # ======================================================= Continue main program
468: # ---------------------------------------------------- Fork once and dissociate
469:
470: $fpid=fork;
471: exit if $fpid;
472: die "Couldn't fork: $!" unless defined ($fpid);
473:
474: POSIX::setsid() or die "Can't start new session: $!";
475:
476: # ------------------------------------------------------- Write our PID on disk
477:
478: $execdir=$perlvar{'lonDaemons'};
479: open (PIDSAVE,">$execdir/logs/lond.pid");
480: print PIDSAVE "$$\n";
481: close(PIDSAVE);
482: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
483: &status('Starting');
484:
485:
486:
487: # ----------------------------------------------------- Install signal handlers
488:
489:
490: $SIG{CHLD} = \&REAPER;
491: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
492: $SIG{HUP} = \&HUPSMAN;
493: $SIG{USR1} = \&checkchildren;
494:
495:
496:
497: # --------------------------------------------------------------
498: # Accept connections. When a connection comes in, it is validated
499: # and if good, a child process is created to process transactions
500: # along the connection.
501:
502: while (1) {
503: $client = $server->accept() or next;
504: make_new_child($client);
505: }
506:
507: sub make_new_child {
508: my $client;
509: my $pid;
510: my $cipher;
511: my $sigset;
512:
513: $client = shift;
514: &logthis("Attempting to start child");
515: # block signal for fork
516: $sigset = POSIX::SigSet->new(SIGINT);
517: sigprocmask(SIG_BLOCK, $sigset)
518: or die "Can't block SIGINT for fork: $!\n";
519:
520: die "fork: $!" unless defined ($pid = fork);
521:
522: if ($pid) {
523: # Parent records the child's birth and returns.
524: sigprocmask(SIG_UNBLOCK, $sigset)
525: or die "Can't unblock SIGINT for fork: $!\n";
526: $children{$pid} = 1;
527: $children++;
528: &status('Started child '.$pid);
529: return;
530: } else {
531: # Child can *not* return from this subroutine.
532: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
533: $SIG{USR1}= \&logstatus;
534: $SIG{ALRM}= \&timeout;
535: $lastlog='Forked ';
536: $status='Forked';
537:
538: # unblock signals
539: sigprocmask(SIG_UNBLOCK, $sigset)
540: or die "Can't unblock SIGINT for fork: $!\n";
541:
542: $tmpsnum=0;
543: #---------------------------------------------------- kerberos 5 initialization
544: &Authen::Krb5::init_context();
545: &Authen::Krb5::init_ets();
546:
547: &status('Accepted connection');
548: # =============================================================================
549: # do something with the connection
550: # -----------------------------------------------------------------------------
551: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
552: # connection liveness.
553: # see if we know client and check for spoof IP by challenge
554: my $caller = getpeername($client);
555: my ($port,$iaddr)=unpack_sockaddr_in($caller);
556: my $clientip=inet_ntoa($iaddr);
557: my $clientrec=($hostid{$clientip} ne undef);
558: &logthis(
559: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
560: );
561: &status("Connecting $clientip ($hostid{$clientip})");
562: my $clientok;
563: if ($clientrec) {
564: &status("Waiting for init from $clientip ($hostid{$clientip})");
565: my $remotereq=<$client>;
566: $remotereq=~s/\W//g;
567: if ($remotereq eq 'init') {
568: my $challenge="$$".time;
569: print $client "$challenge\n";
570: &status(
571: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
572: $remotereq=<$client>;
573: $remotereq=~s/\W//g;
574: if ($challenge eq $remotereq) {
575: $clientok=1;
576: print $client "ok\n";
577: } else {
578: &logthis(
579: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
580: &status('No challenge reply '.$clientip);
581: }
582: } else {
583: &logthis(
584: "<font color=blue>WARNING: "
585: ."$clientip failed to initialize: >$remotereq< </font>");
586: &status('No init '.$clientip);
587: }
588: } else {
589: &logthis(
590: "<font color=blue>WARNING: Unknown client $clientip</font>");
591: &status('Hung up on '.$clientip);
592: }
593: if ($clientok) {
594: # ---------------- New known client connecting, could mean machine online again
595:
596: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
597: &logthis(
598: "<font color=green>Established connection: $hostid{$clientip}</font>");
599: &status('Will listen to '.$hostid{$clientip});
600: # ------------------------------------------------------------ Process requests
601: while (my $userinput=<$client>) {
602: chomp($userinput);
603: Debug("Request = $userinput\n");
604: &status('Processing '.$hostid{$clientip}.': '.$userinput);
605: my $wasenc=0;
606: alarm(120);
607: # ------------------------------------------------------------ See if encrypted
608: if ($userinput =~ /^enc/) {
609: if ($cipher) {
610: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
611: $userinput='';
612: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
613: $userinput.=
614: $cipher->decrypt(
615: pack("H16",substr($encinput,$encidx,16))
616: );
617: }
618: $userinput=substr($userinput,0,$cmdlength);
619: $wasenc=1;
620: }
621: }
622:
623: # ------------------------------------------------------------- Normal commands
624: # ------------------------------------------------------------------------ ping
625: if ($userinput =~ /^ping/) {
626: print $client "$perlvar{'lonHostID'}\n";
627: # ------------------------------------------------------------------------ pong
628: } elsif ($userinput =~ /^pong/) {
629: $reply=reply("ping",$hostid{$clientip});
630: print $client "$perlvar{'lonHostID'}:$reply\n";
631: # ------------------------------------------------------------------------ ekey
632: } elsif ($userinput =~ /^ekey/) {
633: my $buildkey=time.$$.int(rand 100000);
634: $buildkey=~tr/1-6/A-F/;
635: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
636: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
637: $key=~tr/a-z/A-Z/;
638: $key=~tr/G-P/0-9/;
639: $key=~tr/Q-Z/0-9/;
640: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
641: $key=substr($key,0,32);
642: my $cipherkey=pack("H32",$key);
643: $cipher=new IDEA $cipherkey;
644: print $client "$buildkey\n";
645: # ------------------------------------------------------------------------ load
646: } elsif ($userinput =~ /^load/) {
647: my $loadavg;
648: {
649: my $loadfile=IO::File->new('/proc/loadavg');
650: $loadavg=<$loadfile>;
651: }
652: $loadavg =~ s/\s.*//g;
653: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
654: print $client "$loadpercent\n";
655: # ----------------------------------------------------------------- currentauth
656: } elsif ($userinput =~ /^currentauth/) {
657: if ($wasenc==1) {
658: my ($cmd,$udom,$uname)=split(/:/,$userinput);
659: my $result = GetAuthType($udom, $uname);
660: if($result eq "nouser") {
661: print $client "unknown_user\n";
662: }
663: else {
664: print $client "$result\n"
665: }
666: } else {
667: print $client "refused\n";
668: }
669: # ------------------------------------------------------------------------ auth
670: } elsif ($userinput =~ /^auth/) {
671: if ($wasenc==1) {
672: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
673: chomp($upass);
674: $upass=unescape($upass);
675: my $proname=propath($udom,$uname);
676: my $passfilename="$proname/passwd";
677: if (-e $passfilename) {
678: my $pf = IO::File->new($passfilename);
679: my $realpasswd=<$pf>;
680: chomp($realpasswd);
681: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
682: my $pwdcorrect=0;
683: if ($howpwd eq 'internal') {
684: &Debug("Internal auth");
685: $pwdcorrect=
686: (crypt($upass,$contentpwd) eq $contentpwd);
687: } elsif ($howpwd eq 'unix') {
688: &Debug("Unix auth");
689: if((getpwnam($uname))[1] eq "") { #no such user!
690: $pwdcorrect = 0;
691: } else {
692: $contentpwd=(getpwnam($uname))[1];
693: my $pwauth_path="/usr/local/sbin/pwauth";
694: unless ($contentpwd eq 'x') {
695: $pwdcorrect=
696: (crypt($upass,$contentpwd) eq
697: $contentpwd);
698: }
699:
700: elsif (-e $pwauth_path) {
701: open PWAUTH, "|$pwauth_path" or
702: die "Cannot invoke authentication";
703: print PWAUTH "$uname\n$upass\n";
704: close PWAUTH;
705: $pwdcorrect=!$?;
706: }
707: }
708: } elsif ($howpwd eq 'krb4') {
709: $null=pack("C",0);
710: unless ($upass=~/$null/) {
711: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
712: ($uname,"",$contentpwd,'krbtgt',
713: $contentpwd,1,$upass);
714: if (!$krb4_error) {
715: $pwdcorrect = 1;
716: } else {
717: $pwdcorrect=0;
718: # log error if it is not a bad password
719: if ($krb4_error != 62) {
720: &logthis('krb4:'.$uname.','.$contentpwd.','.
721: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
722: }
723: }
724: }
725: } elsif ($howpwd eq 'krb5') {
726: $null=pack("C",0);
727: unless ($upass=~/$null/) {
728: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
729: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
730: my $krbserver=&Authen::Krb5::parse_name($krbservice);
731: my $credentials=&Authen::Krb5::cc_default();
732: $credentials->initialize($krbclient);
733: my $krbreturn =
734: &Authen::Krb5::get_in_tkt_with_password(
735: $krbclient,$krbserver,$upass,$credentials);
736: # unless ($krbreturn) {
737: # &logthis("Krb5 Error: ".
738: # &Authen::Krb5::error());
739: # }
740: $pwdcorrect = ($krbreturn == 1);
741: } else { $pwdcorrect=0; }
742: } elsif ($howpwd eq 'localauth') {
743: $pwdcorrect=&localauth::localauth($uname,$upass,
744: $contentpwd);
745: }
746: if ($pwdcorrect) {
747: print $client "authorized\n";
748: } else {
749: print $client "non_authorized\n";
750: }
751: } else {
752: print $client "unknown_user\n";
753: }
754: } else {
755: print $client "refused\n";
756: }
757: # ---------------------------------------------------------------------- passwd
758: } elsif ($userinput =~ /^passwd/) {
759: if ($wasenc==1) {
760: my
761: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
762: chomp($npass);
763: $upass=&unescape($upass);
764: $npass=&unescape($npass);
765: &Debug("Trying to change password for $uname");
766: my $proname=propath($udom,$uname);
767: my $passfilename="$proname/passwd";
768: if (-e $passfilename) {
769: my $realpasswd;
770: { my $pf = IO::File->new($passfilename);
771: $realpasswd=<$pf>; }
772: chomp($realpasswd);
773: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
774: if ($howpwd eq 'internal') {
775: &Debug("internal auth");
776: if (crypt($upass,$contentpwd) eq $contentpwd) {
777: my $salt=time;
778: $salt=substr($salt,6,2);
779: my $ncpass=crypt($npass,$salt);
780: { my $pf = IO::File->new(">$passfilename");
781: print $pf "internal:$ncpass\n"; }
782: &logthis("Result of password change for $uname: pwchange_success");
783: print $client "ok\n";
784: } else {
785: print $client "non_authorized\n";
786: }
787: } elsif ($howpwd eq 'unix') {
788: # Unix means we have to access /etc/password
789: # one way or another.
790: # First: Make sure the current password is
791: # correct
792: &Debug("auth is unix");
793: $contentpwd=(getpwnam($uname))[1];
794: my $pwdcorrect = "0";
795: my $pwauth_path="/usr/local/sbin/pwauth";
796: unless ($contentpwd eq 'x') {
797: $pwdcorrect=
798: (crypt($upass,$contentpwd) eq $contentpwd);
799: } elsif (-e $pwauth_path) {
800: open PWAUTH, "|$pwauth_path" or
801: die "Cannot invoke authentication";
802: print PWAUTH "$uname\n$upass\n";
803: close PWAUTH;
804: &Debug("exited pwauth with $? ($uname,$upass) ");
805: $pwdcorrect=($? == 0);
806: }
807: if ($pwdcorrect) {
808: my $execdir=$perlvar{'lonDaemons'};
809: &Debug("Opening lcpasswd pipeline");
810: my $pf = IO::File->new("|$execdir/lcpasswd > /home/www/lcpasswd.log");
811: print $pf "$uname\n$npass\n$npass\n";
812: close $pf;
813: my $err = $?;
814: my $result = ($err>0 ? 'pwchange_failure'
815: : 'ok');
816: &logthis("Result of password change for $uname: ".
817: &lcpasswdstrerror($?));
818: print $client "$result\n";
819: } else {
820: print $client "non_authorized\n";
821: }
822: } else {
823: print $client "auth_mode_error\n";
824: }
825: } else {
826: print $client "unknown_user\n";
827: }
828: } else {
829: print $client "refused\n";
830: }
831: # -------------------------------------------------------------------- makeuser
832: } elsif ($userinput =~ /^makeuser/) {
833: &Debug("Make user received");
834: my $oldumask=umask(0077);
835: if ($wasenc==1) {
836: my
837: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
838: &Debug("cmd =".$cmd." $udom =".$udom.
839: " uname=".$uname);
840: chomp($npass);
841: $npass=&unescape($npass);
842: my $proname=propath($udom,$uname);
843: my $passfilename="$proname/passwd";
844: &Debug("Password file created will be:".
845: $passfilename);
846: if (-e $passfilename) {
847: print $client "already_exists\n";
848: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
849: print $client "not_right_domain\n";
850: } else {
851: @fpparts=split(/\//,$proname);
852: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
853: $fperror='';
854: for ($i=3;$i<=$#fpparts;$i++) {
855: $fpnow.='/'.$fpparts[$i];
856: unless (-e $fpnow) {
857: unless (mkdir($fpnow,0777)) {
858: $fperror="error: ".($!+0)
859: ." mkdir failed while attempting "
860: ."makeuser\n";
861: }
862: }
863: }
864: unless ($fperror) {
865: my $result=&make_passwd_file($uname, $umode,$npass,
866: $passfilename);
867: print $client $result;
868: } else {
869: print $client "$fperror\n";
870: }
871: }
872: } else {
873: print $client "refused\n";
874: }
875: umask($oldumask);
876: # -------------------------------------------------------------- changeuserauth
877: } elsif ($userinput =~ /^changeuserauth/) {
878: &Debug("Changing authorization");
879: if ($wasenc==1) {
880: my
881: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
882: chomp($npass);
883: &Debug("cmd = ".$cmd." domain= ".$udom.
884: "uname =".$uname." umode= ".$umode);
885: $npass=&unescape($npass);
886: my $proname=&propath($udom,$uname);
887: my $passfilename="$proname/passwd";
888: if ($udom ne $perlvar{'lonDefDomain'}) {
889: print $client "not_right_domain\n";
890: } else {
891: my $result=&make_passwd_file($uname, $umode,$npass,
892: $passfilename);
893: print $client $result;
894: }
895: } else {
896: print $client "refused\n";
897: }
898: # ------------------------------------------------------------------------ home
899: } elsif ($userinput =~ /^home/) {
900: my ($cmd,$udom,$uname)=split(/:/,$userinput);
901: chomp($uname);
902: my $proname=propath($udom,$uname);
903: if (-e $proname) {
904: print $client "found\n";
905: } else {
906: print $client "not_found\n";
907: }
908: # ---------------------------------------------------------------------- update
909: } elsif ($userinput =~ /^update/) {
910: my ($cmd,$fname)=split(/:/,$userinput);
911: my $ownership=ishome($fname);
912: if ($ownership eq 'not_owner') {
913: if (-e $fname) {
914: my ($dev,$ino,$mode,$nlink,
915: $uid,$gid,$rdev,$size,
916: $atime,$mtime,$ctime,
917: $blksize,$blocks)=stat($fname);
918: $now=time;
919: $since=$now-$atime;
920: if ($since>$perlvar{'lonExpire'}) {
921: $reply=
922: reply("unsub:$fname","$hostid{$clientip}");
923: unlink("$fname");
924: } else {
925: my $transname="$fname.in.transfer";
926: my $remoteurl=
927: reply("sub:$fname","$hostid{$clientip}");
928: my $response;
929: {
930: my $ua=new LWP::UserAgent;
931: my $request=new HTTP::Request('GET',"$remoteurl");
932: $response=$ua->request($request,$transname);
933: }
934: if ($response->is_error()) {
935: unlink($transname);
936: my $message=$response->status_line;
937: &logthis(
938: "LWP GET: $message for $fname ($remoteurl)");
939: } else {
940: if ($remoteurl!~/\.meta$/) {
941: my $ua=new LWP::UserAgent;
942: my $mrequest=
943: new HTTP::Request('GET',$remoteurl.'.meta');
944: my $mresponse=
945: $ua->request($mrequest,$fname.'.meta');
946: if ($mresponse->is_error()) {
947: unlink($fname.'.meta');
948: }
949: }
950: rename($transname,$fname);
951: }
952: }
953: print $client "ok\n";
954: } else {
955: print $client "not_found\n";
956: }
957: } else {
958: print $client "rejected\n";
959: }
960: # -------------------------------------- fetch a user file from a remote server
961: } elsif ($userinput =~ /^fetchuserfile/) {
962: my ($cmd,$fname)=split(/:/,$userinput);
963: my ($udom,$uname,$ufile)=split(/\//,$fname);
964: my $udir=propath($udom,$uname).'/userfiles';
965: unless (-e $udir) { mkdir($udir,0770); }
966: if (-e $udir) {
967: $ufile=~s/^[\.\~]+//;
968: $ufile=~s/\///g;
969: my $transname=$udir.'/'.$ufile;
970: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
971: my $response;
972: {
973: my $ua=new LWP::UserAgent;
974: my $request=new HTTP::Request('GET',"$remoteurl");
975: $response=$ua->request($request,$transname);
976: }
977: if ($response->is_error()) {
978: unlink($transname);
979: my $message=$response->status_line;
980: &logthis(
981: "LWP GET: $message for $fname ($remoteurl)");
982: print $client "failed\n";
983: } else {
984: print $client "ok\n";
985: }
986: } else {
987: print $client "not_home\n";
988: }
989: # ------------------------------------------ authenticate access to a user file
990: } elsif ($userinput =~ /^tokenauthuserfile/) {
991: my ($cmd,$fname,$session)=split(/:/,$userinput);
992: chomp($session);
993: $reply='non_auth';
994: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
995: $session.'.id')) {
996: while ($line=<ENVIN>) {
997: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
998: }
999: close(ENVIN);
1000: print $client $reply."\n";
1001: } else {
1002: print $client "invalid_token\n";
1003: }
1004: # ----------------------------------------------------------------- unsubscribe
1005: } elsif ($userinput =~ /^unsub/) {
1006: my ($cmd,$fname)=split(/:/,$userinput);
1007: if (-e $fname) {
1008: print $client &unsub($client,$fname,$clientip);
1009: } else {
1010: print $client "not_found\n";
1011: }
1012: # ------------------------------------------------------------------- subscribe
1013: } elsif ($userinput =~ /^sub/) {
1014: print $client &subscribe($userinput,$clientip);
1015: # ------------------------------------------------------------- current version
1016: } elsif ($userinput =~ /^currentversion/) {
1017: my ($cmd,$fname)=split(/:/,$userinput);
1018: print $client ¤tversion($fname)."\n";
1019: # ------------------------------------------------------------------------- log
1020: } elsif ($userinput =~ /^log/) {
1021: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1022: chomp($what);
1023: my $proname=propath($udom,$uname);
1024: my $now=time;
1025: {
1026: my $hfh;
1027: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1028: print $hfh "$now:$hostid{$clientip}:$what\n";
1029: print $client "ok\n";
1030: } else {
1031: print $client "error: ".($!+0)
1032: ." IO::File->new Failed "
1033: ."while attempting log\n";
1034: }
1035: }
1036: # ------------------------------------------------------------------------- put
1037: } elsif ($userinput =~ /^put/) {
1038: my ($cmd,$udom,$uname,$namespace,$what)
1039: =split(/:/,$userinput);
1040: $namespace=~s/\//\_/g;
1041: $namespace=~s/\W//g;
1042: if ($namespace ne 'roles') {
1043: chomp($what);
1044: my $proname=propath($udom,$uname);
1045: my $now=time;
1046: unless ($namespace=~/^nohist\_/) {
1047: my $hfh;
1048: if (
1049: $hfh=IO::File->new(">>$proname/$namespace.hist")
1050: ) { print $hfh "P:$now:$what\n"; }
1051: }
1052: my @pairs=split(/\&/,$what);
1053: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1054: foreach $pair (@pairs) {
1055: ($key,$value)=split(/=/,$pair);
1056: $hash{$key}=$value;
1057: }
1058: if (untie(%hash)) {
1059: print $client "ok\n";
1060: } else {
1061: print $client "error: ".($!+0)
1062: ." untie(GDBM) failed ".
1063: "while attempting put\n";
1064: }
1065: } else {
1066: print $client "error: ".($!)
1067: ." tie(GDBM) Failed ".
1068: "while attempting put\n";
1069: }
1070: } else {
1071: print $client "refused\n";
1072: }
1073: # -------------------------------------------------------------------- rolesput
1074: } elsif ($userinput =~ /^rolesput/) {
1075: &Debug("rolesput");
1076: if ($wasenc==1) {
1077: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1078: =split(/:/,$userinput);
1079: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1080: "user = ".$exeuser." udom=".$udom.
1081: "what = ".$what);
1082: my $namespace='roles';
1083: chomp($what);
1084: my $proname=propath($udom,$uname);
1085: my $now=time;
1086: {
1087: my $hfh;
1088: if (
1089: $hfh=IO::File->new(">>$proname/$namespace.hist")
1090: ) {
1091: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1092: }
1093: }
1094: my @pairs=split(/\&/,$what);
1095: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1096: foreach $pair (@pairs) {
1097: ($key,$value)=split(/=/,$pair);
1098: &ManagePermissions($key, $udom, $uname,
1099: &GetAuthType( $udom,
1100: $uname));
1101: $hash{$key}=$value;
1102:
1103: }
1104: if (untie(%hash)) {
1105: print $client "ok\n";
1106: } else {
1107: print $client "error: ".($!+0)
1108: ." untie(GDBM) Failed ".
1109: "while attempting rolesput\n";
1110: }
1111: } else {
1112: print $client "error: ".($!+0)
1113: ." tie(GDBM) Failed ".
1114: "while attempting rolesput\n";
1115: }
1116: } else {
1117: print $client "refused\n";
1118: }
1119: # ------------------------------------------------------------------------- get
1120: } elsif ($userinput =~ /^get/) {
1121: my ($cmd,$udom,$uname,$namespace,$what)
1122: =split(/:/,$userinput);
1123: $namespace=~s/\//\_/g;
1124: $namespace=~s/\W//g;
1125: chomp($what);
1126: my @queries=split(/\&/,$what);
1127: my $proname=propath($udom,$uname);
1128: my $qresult='';
1129: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1130: for ($i=0;$i<=$#queries;$i++) {
1131: $qresult.="$hash{$queries[$i]}&";
1132: }
1133: if (untie(%hash)) {
1134: $qresult=~s/\&$//;
1135: print $client "$qresult\n";
1136: } else {
1137: print $client "error: ".($!+0)
1138: ." untie(GDBM) Failed ".
1139: "while attempting get\n";
1140: }
1141: } else {
1142: print $client "error: ".($!+0)
1143: ." tie(GDBM) Failed ".
1144: "while attempting get\n";
1145: }
1146: # ------------------------------------------------------------------------ eget
1147: } elsif ($userinput =~ /^eget/) {
1148: my ($cmd,$udom,$uname,$namespace,$what)
1149: =split(/:/,$userinput);
1150: $namespace=~s/\//\_/g;
1151: $namespace=~s/\W//g;
1152: chomp($what);
1153: my @queries=split(/\&/,$what);
1154: my $proname=propath($udom,$uname);
1155: my $qresult='';
1156: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1157: for ($i=0;$i<=$#queries;$i++) {
1158: $qresult.="$hash{$queries[$i]}&";
1159: }
1160: if (untie(%hash)) {
1161: $qresult=~s/\&$//;
1162: if ($cipher) {
1163: my $cmdlength=length($qresult);
1164: $qresult.=" ";
1165: my $encqresult='';
1166: for
1167: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1168: $encqresult.=
1169: unpack("H16",
1170: $cipher->encrypt(substr($qresult,$encidx,8)));
1171: }
1172: print $client "enc:$cmdlength:$encqresult\n";
1173: } else {
1174: print $client "error:no_key\n";
1175: }
1176: } else {
1177: print $client "error: ".($!+0)
1178: ." untie(GDBM) Failed ".
1179: "while attempting eget\n";
1180: }
1181: } else {
1182: print $client "error: ".($!+0)
1183: ." tie(GDBM) Failed ".
1184: "while attempting eget\n";
1185: }
1186: # ------------------------------------------------------------------------- del
1187: } elsif ($userinput =~ /^del/) {
1188: my ($cmd,$udom,$uname,$namespace,$what)
1189: =split(/:/,$userinput);
1190: $namespace=~s/\//\_/g;
1191: $namespace=~s/\W//g;
1192: chomp($what);
1193: my $proname=propath($udom,$uname);
1194: my $now=time;
1195: unless ($namespace=~/^nohist\_/) {
1196: my $hfh;
1197: if (
1198: $hfh=IO::File->new(">>$proname/$namespace.hist")
1199: ) { print $hfh "D:$now:$what\n"; }
1200: }
1201: my @keys=split(/\&/,$what);
1202: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1203: foreach $key (@keys) {
1204: delete($hash{$key});
1205: }
1206: if (untie(%hash)) {
1207: print $client "ok\n";
1208: } else {
1209: print $client "error: ".($!+0)
1210: ." untie(GDBM) Failed ".
1211: "while attempting del\n";
1212: }
1213: } else {
1214: print $client "error: ".($!+0)
1215: ." tie(GDBM) Failed ".
1216: "while attempting del\n";
1217: }
1218: # ------------------------------------------------------------------------ keys
1219: } elsif ($userinput =~ /^keys/) {
1220: my ($cmd,$udom,$uname,$namespace)
1221: =split(/:/,$userinput);
1222: $namespace=~s/\//\_/g;
1223: $namespace=~s/\W//g;
1224: my $proname=propath($udom,$uname);
1225: my $qresult='';
1226: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1227: foreach $key (keys %hash) {
1228: $qresult.="$key&";
1229: }
1230: if (untie(%hash)) {
1231: $qresult=~s/\&$//;
1232: print $client "$qresult\n";
1233: } else {
1234: print $client "error: ".($!+0)
1235: ." untie(GDBM) Failed ".
1236: "while attempting keys\n";
1237: }
1238: } else {
1239: print $client "error: ".($!+0)
1240: ." tie(GDBM) Failed ".
1241: "while attempting keys\n";
1242: }
1243: # ----------------------------------------------------------------- dumpcurrent
1244: } elsif ($userinput =~ /^currentdump/) {
1245: my ($cmd,$udom,$uname,$namespace)
1246: =split(/:/,$userinput);
1247: $namespace=~s/\//\_/g;
1248: $namespace=~s/\W//g;
1249: my $qresult='';
1250: my $proname=propath($udom,$uname);
1251: if (tie(%hash,'GDBM_File',
1252: "$proname/$namespace.db",
1253: &GDBM_READER(),0640)) {
1254: # Structure of %data:
1255: # $data{$symb}->{$parameter}=$value;
1256: # $data{$symb}->{'v.'.$parameter}=$version;
1257: # since $parameter will be unescaped, we do not
1258: # have to worry about silly parameter names...
1259: my %data = ();
1260: while (my ($key,$value) = each(%hash)) {
1261: my ($v,$symb,$param) = split(/:/,$key);
1262: next if ($v eq 'version' || $symb eq 'keys');
1263: next if (exists($data{$symb}) &&
1264: exists($data{$symb}->{$param}) &&
1265: $data{$symb}->{'v.'.$param} > $v);
1266: $data{$symb}->{$param}=$value;
1267: $data{$symb}->{'v.'.$param}=$v;
1268: }
1269: if (untie(%hash)) {
1270: while (my ($symb,$param_hash) = each(%data)) {
1271: while(my ($param,$value) = each (%$param_hash)){
1272: next if ($param =~ /^v\./);
1273: $qresult.=$symb.':'.$param.'='.$value.'&';
1274: }
1275: }
1276: chop($qresult);
1277: print $client "$qresult\n";
1278: } else {
1279: print $client "error: ".($!+0)
1280: ." untie(GDBM) Failed ".
1281: "while attempting currentdump\n";
1282: }
1283: } else {
1284: print $client "error: ".($!+0)
1285: ." tie(GDBM) Failed ".
1286: "while attempting currentdump\n";
1287: }
1288: # ------------------------------------------------------------------------ dump
1289: } elsif ($userinput =~ /^dump/) {
1290: my ($cmd,$udom,$uname,$namespace,$regexp)
1291: =split(/:/,$userinput);
1292: $namespace=~s/\//\_/g;
1293: $namespace=~s/\W//g;
1294: if (defined($regexp)) {
1295: $regexp=&unescape($regexp);
1296: } else {
1297: $regexp='.';
1298: }
1299: my $qresult='';
1300: my $proname=propath($udom,$uname);
1301: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1302: study($regexp);
1303: while (($key,$value) = each(%hash)) {
1304: if ($regexp eq '.') {
1305: $qresult.=$key.'='.$value.'&';
1306: } else {
1307: my $unescapeKey = &unescape($key);
1308: if (eval('$unescapeKey=~/$regexp/')) {
1309: $qresult.="$key=$value&";
1310: }
1311: }
1312: }
1313: if (untie(%hash)) {
1314: chop($qresult);
1315: print $client "$qresult\n";
1316: } else {
1317: print $client "error: ".($!+0)
1318: ." untie(GDBM) Failed ".
1319: "while attempting dump\n";
1320: }
1321: } else {
1322: print $client "error: ".($!+0)
1323: ." tie(GDBM) Failed ".
1324: "while attempting dump\n";
1325: }
1326: # ----------------------------------------------------------------------- store
1327: } elsif ($userinput =~ /^store/) {
1328: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1329: =split(/:/,$userinput);
1330: $namespace=~s/\//\_/g;
1331: $namespace=~s/\W//g;
1332: if ($namespace ne 'roles') {
1333: chomp($what);
1334: my $proname=propath($udom,$uname);
1335: my $now=time;
1336: unless ($namespace=~/^nohist\_/) {
1337: my $hfh;
1338: if (
1339: $hfh=IO::File->new(">>$proname/$namespace.hist")
1340: ) { print $hfh "P:$now:$rid:$what\n"; }
1341: }
1342: my @pairs=split(/\&/,$what);
1343:
1344: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1345: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1346: my $key;
1347: $hash{"version:$rid"}++;
1348: my $version=$hash{"version:$rid"};
1349: my $allkeys='';
1350: foreach $pair (@pairs) {
1351: ($key,$value)=split(/=/,$pair);
1352: $allkeys.=$key.':';
1353: $hash{"$version:$rid:$key"}=$value;
1354: }
1355: $hash{"$version:$rid:timestamp"}=$now;
1356: $allkeys.='timestamp';
1357: $hash{"$version:keys:$rid"}=$allkeys;
1358: if (untie(%hash)) {
1359: print $client "ok\n";
1360: } else {
1361: print $client "error: ".($!+0)
1362: ." untie(GDBM) Failed ".
1363: "while attempting store\n";
1364: }
1365: } else {
1366: print $client "error: ".($!+0)
1367: ." tie(GDBM) Failed ".
1368: "while attempting store\n";
1369: }
1370: } else {
1371: print $client "refused\n";
1372: }
1373: # --------------------------------------------------------------------- restore
1374: } elsif ($userinput =~ /^restore/) {
1375: my ($cmd,$udom,$uname,$namespace,$rid)
1376: =split(/:/,$userinput);
1377: $namespace=~s/\//\_/g;
1378: $namespace=~s/\W//g;
1379: chomp($rid);
1380: my $proname=propath($udom,$uname);
1381: my $qresult='';
1382: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1383: my $version=$hash{"version:$rid"};
1384: $qresult.="version=$version&";
1385: my $scope;
1386: for ($scope=1;$scope<=$version;$scope++) {
1387: my $vkeys=$hash{"$scope:keys:$rid"};
1388: my @keys=split(/:/,$vkeys);
1389: my $key;
1390: $qresult.="$scope:keys=$vkeys&";
1391: foreach $key (@keys) {
1392: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1393: }
1394: }
1395: if (untie(%hash)) {
1396: $qresult=~s/\&$//;
1397: print $client "$qresult\n";
1398: } else {
1399: print $client "error: ".($!+0)
1400: ." untie(GDBM) Failed ".
1401: "while attempting restore\n";
1402: }
1403: } else {
1404: print $client "error: ".($!+0)
1405: ." tie(GDBM) Failed ".
1406: "while attempting restore\n";
1407: }
1408: # -------------------------------------------------------------------- chatsend
1409: } elsif ($userinput =~ /^chatsend/) {
1410: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1411: &chatadd($cdom,$cnum,$newpost);
1412: print $client "ok\n";
1413: # -------------------------------------------------------------------- chatretr
1414: } elsif ($userinput =~ /^chatretr/) {
1415: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1416: my $reply='';
1417: foreach (&getchat($cdom,$cnum)) {
1418: $reply.=&escape($_).':';
1419: }
1420: $reply=~s/\:$//;
1421: print $client $reply."\n";
1422: # ------------------------------------------------------------------- querysend
1423: } elsif ($userinput =~ /^querysend/) {
1424: my ($cmd,$query,
1425: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1426: $query=~s/\n*$//g;
1427: print $client "".
1428: sqlreply("$hostid{$clientip}\&$query".
1429: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1430: # ------------------------------------------------------------------ queryreply
1431: } elsif ($userinput =~ /^queryreply/) {
1432: my ($cmd,$id,$reply)=split(/:/,$userinput);
1433: my $store;
1434: my $execdir=$perlvar{'lonDaemons'};
1435: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1436: $reply=~s/\&/\n/g;
1437: print $store $reply;
1438: close $store;
1439: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1440: print $store2 "done\n";
1441: close $store2;
1442: print $client "ok\n";
1443: }
1444: else {
1445: print $client "error: ".($!+0)
1446: ." IO::File->new Failed ".
1447: "while attempting queryreply\n";
1448: }
1449: # ----------------------------------------------------------------------- idput
1450: } elsif ($userinput =~ /^idput/) {
1451: my ($cmd,$udom,$what)=split(/:/,$userinput);
1452: chomp($what);
1453: $udom=~s/\W//g;
1454: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1455: my $now=time;
1456: {
1457: my $hfh;
1458: if (
1459: $hfh=IO::File->new(">>$proname.hist")
1460: ) { print $hfh "P:$now:$what\n"; }
1461: }
1462: my @pairs=split(/\&/,$what);
1463: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1464: foreach $pair (@pairs) {
1465: ($key,$value)=split(/=/,$pair);
1466: $hash{$key}=$value;
1467: }
1468: if (untie(%hash)) {
1469: print $client "ok\n";
1470: } else {
1471: print $client "error: ".($!+0)
1472: ." untie(GDBM) Failed ".
1473: "while attempting idput\n";
1474: }
1475: } else {
1476: print $client "error: ".($!+0)
1477: ." tie(GDBM) Failed ".
1478: "while attempting idput\n";
1479: }
1480: # ----------------------------------------------------------------------- idget
1481: } elsif ($userinput =~ /^idget/) {
1482: my ($cmd,$udom,$what)=split(/:/,$userinput);
1483: chomp($what);
1484: $udom=~s/\W//g;
1485: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1486: my @queries=split(/\&/,$what);
1487: my $qresult='';
1488: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1489: for ($i=0;$i<=$#queries;$i++) {
1490: $qresult.="$hash{$queries[$i]}&";
1491: }
1492: if (untie(%hash)) {
1493: $qresult=~s/\&$//;
1494: print $client "$qresult\n";
1495: } else {
1496: print $client "error: ".($!+0)
1497: ." untie(GDBM) Failed ".
1498: "while attempting idget\n";
1499: }
1500: } else {
1501: print $client "error: ".($!+0)
1502: ." tie(GDBM) Failed ".
1503: "while attempting idget\n";
1504: }
1505: # ---------------------------------------------------------------------- tmpput
1506: } elsif ($userinput =~ /^tmpput/) {
1507: my ($cmd,$what)=split(/:/,$userinput);
1508: my $store;
1509: $tmpsnum++;
1510: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1511: $id=~s/\W/\_/g;
1512: $what=~s/\n//g;
1513: my $execdir=$perlvar{'lonDaemons'};
1514: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1515: print $store $what;
1516: close $store;
1517: print $client "$id\n";
1518: }
1519: else {
1520: print $client "error: ".($!+0)
1521: ."IO::File->new Failed ".
1522: "while attempting tmpput\n";
1523: }
1524:
1525: # ---------------------------------------------------------------------- tmpget
1526: } elsif ($userinput =~ /^tmpget/) {
1527: my ($cmd,$id)=split(/:/,$userinput);
1528: chomp($id);
1529: $id=~s/\W/\_/g;
1530: my $store;
1531: my $execdir=$perlvar{'lonDaemons'};
1532: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1533: my $reply=<$store>;
1534: print $client "$reply\n";
1535: close $store;
1536: }
1537: else {
1538: print $client "error: ".($!+0)
1539: ."IO::File->new Failed ".
1540: "while attempting tmpget\n";
1541: }
1542:
1543: # ---------------------------------------------------------------------- tmpdel
1544: } elsif ($userinput =~ /^tmpdel/) {
1545: my ($cmd,$id)=split(/:/,$userinput);
1546: chomp($id);
1547: $id=~s/\W/\_/g;
1548: my $execdir=$perlvar{'lonDaemons'};
1549: if (unlink("$execdir/tmp/$id.tmp")) {
1550: print $client "ok\n";
1551: } else {
1552: print $client "error: ".($!+0)
1553: ."Unlink tmp Failed ".
1554: "while attempting tmpdel\n";
1555: }
1556: # -------------------------------------------------------------------------- ls
1557: } elsif ($userinput =~ /^ls/) {
1558: my ($cmd,$ulsdir)=split(/:/,$userinput);
1559: my $ulsout='';
1560: my $ulsfn;
1561: if (-e $ulsdir) {
1562: if(-d $ulsdir) {
1563: if (opendir(LSDIR,$ulsdir)) {
1564: while ($ulsfn=readdir(LSDIR)) {
1565: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1566: $ulsout.=$ulsfn.'&'.
1567: join('&',@ulsstats).':';
1568: }
1569: closedir(LSDIR);
1570: }
1571: } else {
1572: my @ulsstats=stat($ulsdir);
1573: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1574: }
1575: } else {
1576: $ulsout='no_such_dir';
1577: }
1578: if ($ulsout eq '') { $ulsout='empty'; }
1579: print $client "$ulsout\n";
1580: # ------------------------------------------------------------------ Hanging up
1581: } elsif (($userinput =~ /^exit/) ||
1582: ($userinput =~ /^init/)) {
1583: &logthis(
1584: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1585: print $client "bye\n";
1586: $client->close();
1587: last;
1588: # ------------------------------------------------------------- unknown command
1589: } else {
1590: # unknown command
1591: print $client "unknown_cmd\n";
1592: }
1593: # -------------------------------------------------------------------- complete
1594: alarm(0);
1595: &status('Listening to '.$hostid{$clientip});
1596: }
1597: # --------------------------------------------- client unknown or fishy, refuse
1598: } else {
1599: print $client "refused\n";
1600: $client->close();
1601: &logthis("<font color=blue>WARNING: "
1602: ."Rejected client $clientip, closing connection</font>");
1603: }
1604: }
1605:
1606: # =============================================================================
1607:
1608: &logthis("<font color=red>CRITICAL: "
1609: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1610:
1611:
1612: # this exit is VERY important, otherwise the child will become
1613: # a producer of more and more children, forking yourself into
1614: # process death.
1615: exit;
1616:
1617: }
1618:
1619:
1620: #
1621: # Checks to see if the input roleput request was to set
1622: # an author role. If so, invokes the lchtmldir script to set
1623: # up a correct public_html
1624: # Parameters:
1625: # request - The request sent to the rolesput subchunk.
1626: # We're looking for /domain/_au
1627: # domain - The domain in which the user is having roles doctored.
1628: # user - Name of the user for which the role is being put.
1629: # authtype - The authentication type associated with the user.
1630: #
1631: sub ManagePermissions
1632: {
1633: my $request = shift;
1634: my $domain = shift;
1635: my $user = shift;
1636: my $authtype= shift;
1637:
1638: # See if the request is of the form /$domain/_au
1639:
1640: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1641: my $execdir = $perlvar{'lonDaemons'};
1642: my $userhome= "/home/$user" ;
1643: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1644: system("$execdir/lchtmldir $userhome $user $authtype");
1645: }
1646: }
1647: #
1648: # GetAuthType - Determines the authorization type of a user in a domain.
1649:
1650: # Returns the authorization type or nouser if there is no such user.
1651: #
1652: sub GetAuthType
1653: {
1654: my $domain = shift;
1655: my $user = shift;
1656:
1657: Debug("GetAuthType( $domain, $user ) \n");
1658: my $proname = &propath($domain, $user);
1659: my $passwdfile = "$proname/passwd";
1660: if( -e $passwdfile ) {
1661: my $pf = IO::File->new($passwdfile);
1662: my $realpassword = <$pf>;
1663: chomp($realpassword);
1664: Debug("Password info = $realpassword\n");
1665: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1666: Debug("Authtype = $authtype, content = $contentpwd\n");
1667: my $availinfo = '';
1668: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1669: $availinfo = $contentpwd;
1670: }
1671:
1672: return "$authtype:$availinfo";
1673: }
1674: else {
1675: Debug("Returning nouser");
1676: return "nouser";
1677: }
1678: }
1679:
1680: sub addline {
1681: my ($fname,$hostid,$ip,$newline)=@_;
1682: my $contents;
1683: my $found=0;
1684: my $expr='^'.$hostid.':'.$ip.':';
1685: $expr =~ s/\./\\\./g;
1686: if ($sh=IO::File->new("$fname.subscription")) {
1687: while (my $subline=<$sh>) {
1688: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1689: }
1690: $sh->close();
1691: }
1692: $sh=IO::File->new(">$fname.subscription");
1693: if ($contents) { print $sh $contents; }
1694: if ($newline) { print $sh $newline; }
1695: $sh->close();
1696: return $found;
1697: }
1698:
1699: sub getchat {
1700: my ($cdom,$cname)=@_;
1701: my %hash;
1702: my $proname=&propath($cdom,$cname);
1703: my @entries=();
1704: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1705: &GDBM_READER(),0640)) {
1706: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1707: untie %hash;
1708: }
1709: return @entries;
1710: }
1711:
1712: sub chatadd {
1713: my ($cdom,$cname,$newchat)=@_;
1714: my %hash;
1715: my $proname=&propath($cdom,$cname);
1716: my @entries=();
1717: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1718: &GDBM_WRCREAT(),0640)) {
1719: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1720: my $time=time;
1721: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1722: my ($thentime,$idnum)=split(/\_/,$lastid);
1723: my $newid=$time.'_000000';
1724: if ($thentime==$time) {
1725: $idnum=~s/^0+//;
1726: $idnum++;
1727: $idnum=substr('000000'.$idnum,-6,6);
1728: $newid=$time.'_'.$idnum;
1729: }
1730: $hash{$newid}=$newchat;
1731: my $expired=$time-3600;
1732: foreach (keys %hash) {
1733: my ($thistime)=($_=~/(\d+)\_/);
1734: if ($thistime<$expired) {
1735: delete $hash{$_};
1736: }
1737: }
1738: untie %hash;
1739: }
1740: }
1741:
1742: sub unsub {
1743: my ($fname,$clientip)=@_;
1744: my $result;
1745: if (unlink("$fname.$hostid{$clientip}")) {
1746: $result="ok\n";
1747: } else {
1748: $result="not_subscribed\n";
1749: }
1750: if (-e "$fname.subscription") {
1751: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1752: if ($found) { $result="ok\n"; }
1753: } else {
1754: if ($result != "ok\n") { $result="not_subscribed\n"; }
1755: }
1756: return $result;
1757: }
1758:
1759: sub currentversion {
1760: my $fname=shift;
1761: my $version=-1;
1762: my $ulsdir='';
1763: if ($fname=~/^(.+)\/[^\/]+$/) {
1764: $ulsdir=$1;
1765: }
1766: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1767: $fname=~s/\.(\w+(?:\.meta)*)$/\.\(\\d\+\)\.$1\$/;
1768:
1769: if (-e $fname) { $version=1; }
1770: if (-e $ulsdir) {
1771: if(-d $ulsdir) {
1772: if (opendir(LSDIR,$ulsdir)) {
1773: while ($ulsfn=readdir(LSDIR)) {
1774: # see if this is a regular file (ignore links produced earlier)
1775: my $thisfile=$ulsdir.'/'.$ulsfn;
1776: unless (-l $thisfile) {
1777: if ($thisfile=~/$fname/) {
1778: if ($1>$version) { $version=$1; }
1779: }
1780: }
1781: }
1782: closedir(LSDIR);
1783: $version++;
1784: }
1785: }
1786: }
1787: return $version;
1788: }
1789:
1790: sub thisversion {
1791: my $fname=shift;
1792: my $version=-1;
1793: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1794: $version=$1;
1795: }
1796: return $version;
1797: }
1798:
1799: sub subscribe {
1800: my ($userinput,$clientip)=@_;
1801: my $result;
1802: my ($cmd,$fname)=split(/:/,$userinput);
1803: my $ownership=&ishome($fname);
1804: if ($ownership eq 'owner') {
1805: # explitly asking for the current version?
1806: unless (-e $fname) {
1807: my $currentversion=¤tversion($fname);
1808: if (&thisversion($fname)==$currentversion) {
1809: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1810: my $root=$1;
1811: my $extension=$2;
1812: symlink($root.'.'.$extension,
1813: $root.'.'.$currentversion.'.'.$extension);
1814: unless ($extension=~/\.meta$/) {
1815: symlink($root.'.'.$extension.'.meta',
1816: $root.'.'.$currentversion.'.'.$extension.'.meta');
1817: }
1818: }
1819: }
1820: }
1821: if (-e $fname) {
1822: if (-d $fname) {
1823: $result="directory\n";
1824: } else {
1825: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1826: $now=time;
1827: my $found=&addline($fname,$hostid{$clientip},$clientip,
1828: "$hostid{$clientip}:$clientip:$now\n");
1829: if ($found) { $result="$fname\n"; }
1830: # if they were subscribed to only meta data, delete that
1831: # subscription, when you subscribe to a file you also get
1832: # the metadata
1833: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1834: $fname=~s/\/home\/httpd\/html\/res/raw/;
1835: $fname="http://$thisserver/".$fname;
1836: $result="$fname\n";
1837: }
1838: } else {
1839: $result="not_found\n";
1840: }
1841: } else {
1842: $result="rejected\n";
1843: }
1844: return $result;
1845: }
1846:
1847: sub make_passwd_file {
1848: my ($uname, $umode,$npass,$passfilename)=@_;
1849: my $result="ok\n";
1850: if ($umode eq 'krb4' or $umode eq 'krb5') {
1851: {
1852: my $pf = IO::File->new(">$passfilename");
1853: print $pf "$umode:$npass\n";
1854: }
1855: } elsif ($umode eq 'internal') {
1856: my $salt=time;
1857: $salt=substr($salt,6,2);
1858: my $ncpass=crypt($npass,$salt);
1859: {
1860: &Debug("Creating internal auth");
1861: my $pf = IO::File->new(">$passfilename");
1862: print $pf "internal:$ncpass\n";
1863: }
1864: } elsif ($umode eq 'localauth') {
1865: {
1866: my $pf = IO::File->new(">$passfilename");
1867: print $pf "localauth:$npass\n";
1868: }
1869: } elsif ($umode eq 'unix') {
1870: {
1871: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1872: {
1873: &Debug("Executing external: ".$execpath);
1874: &Debug("user = ".$uname.", Password =". $npass);
1875: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
1876: print $se "$uname\n";
1877: print $se "$npass\n";
1878: print $se "$npass\n";
1879: }
1880: my $useraddok = $?;
1881: if($useraddok > 0) {
1882: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1883: }
1884: my $pf = IO::File->new(">$passfilename");
1885: print $pf "unix:\n";
1886: }
1887: } elsif ($umode eq 'none') {
1888: {
1889: my $pf = IO::File->new(">$passfilename");
1890: print $pf "none:\n";
1891: }
1892: } else {
1893: $result="auth_mode_error\n";
1894: }
1895: return $result;
1896: }
1897:
1898: # ----------------------------------- POD (plain old documentation, CPAN style)
1899:
1900: =head1 NAME
1901:
1902: lond - "LON Daemon" Server (port "LOND" 5663)
1903:
1904: =head1 SYNOPSIS
1905:
1906: Usage: B<lond>
1907:
1908: Should only be run as user=www. This is a command-line script which
1909: is invoked by B<loncron>. There is no expectation that a typical user
1910: will manually start B<lond> from the command-line. (In other words,
1911: DO NOT START B<lond> YOURSELF.)
1912:
1913: =head1 DESCRIPTION
1914:
1915: There are two characteristics associated with the running of B<lond>,
1916: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1917: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1918: subscriptions, etc). These are described in two large
1919: sections below.
1920:
1921: B<PROCESS MANAGEMENT>
1922:
1923: Preforker - server who forks first. Runs as a daemon. HUPs.
1924: Uses IDEA encryption
1925:
1926: B<lond> forks off children processes that correspond to the other servers
1927: in the network. Management of these processes can be done at the
1928: parent process level or the child process level.
1929:
1930: B<logs/lond.log> is the location of log messages.
1931:
1932: The process management is now explained in terms of linux shell commands,
1933: subroutines internal to this code, and signal assignments:
1934:
1935: =over 4
1936:
1937: =item *
1938:
1939: PID is stored in B<logs/lond.pid>
1940:
1941: This is the process id number of the parent B<lond> process.
1942:
1943: =item *
1944:
1945: SIGTERM and SIGINT
1946:
1947: Parent signal assignment:
1948: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1949:
1950: Child signal assignment:
1951: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1952: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1953: to restart a new child.)
1954:
1955: Command-line invocations:
1956: B<kill> B<-s> SIGTERM I<PID>
1957: B<kill> B<-s> SIGINT I<PID>
1958:
1959: Subroutine B<HUNTSMAN>:
1960: This is only invoked for the B<lond> parent I<PID>.
1961: This kills all the children, and then the parent.
1962: The B<lonc.pid> file is cleared.
1963:
1964: =item *
1965:
1966: SIGHUP
1967:
1968: Current bug:
1969: This signal can only be processed the first time
1970: on the parent process. Subsequent SIGHUP signals
1971: have no effect.
1972:
1973: Parent signal assignment:
1974: $SIG{HUP} = \&HUPSMAN;
1975:
1976: Child signal assignment:
1977: none (nothing happens)
1978:
1979: Command-line invocations:
1980: B<kill> B<-s> SIGHUP I<PID>
1981:
1982: Subroutine B<HUPSMAN>:
1983: This is only invoked for the B<lond> parent I<PID>,
1984: This kills all the children, and then the parent.
1985: The B<lond.pid> file is cleared.
1986:
1987: =item *
1988:
1989: SIGUSR1
1990:
1991: Parent signal assignment:
1992: $SIG{USR1} = \&USRMAN;
1993:
1994: Child signal assignment:
1995: $SIG{USR1}= \&logstatus;
1996:
1997: Command-line invocations:
1998: B<kill> B<-s> SIGUSR1 I<PID>
1999:
2000: Subroutine B<USRMAN>:
2001: When invoked for the B<lond> parent I<PID>,
2002: SIGUSR1 is sent to all the children, and the status of
2003: each connection is logged.
2004:
2005: =item *
2006:
2007: SIGCHLD
2008:
2009: Parent signal assignment:
2010: $SIG{CHLD} = \&REAPER;
2011:
2012: Child signal assignment:
2013: none
2014:
2015: Command-line invocations:
2016: B<kill> B<-s> SIGCHLD I<PID>
2017:
2018: Subroutine B<REAPER>:
2019: This is only invoked for the B<lond> parent I<PID>.
2020: Information pertaining to the child is removed.
2021: The socket port is cleaned up.
2022:
2023: =back
2024:
2025: B<SERVER-SIDE ACTIVITIES>
2026:
2027: Server-side information can be accepted in an encrypted or non-encrypted
2028: method.
2029:
2030: =over 4
2031:
2032: =item ping
2033:
2034: Query a client in the hosts.tab table; "Are you there?"
2035:
2036: =item pong
2037:
2038: Respond to a ping query.
2039:
2040: =item ekey
2041:
2042: Read in encrypted key, make cipher. Respond with a buildkey.
2043:
2044: =item load
2045:
2046: Respond with CPU load based on a computation upon /proc/loadavg.
2047:
2048: =item currentauth
2049:
2050: Reply with current authentication information (only over an
2051: encrypted channel).
2052:
2053: =item auth
2054:
2055: Only over an encrypted channel, reply as to whether a user's
2056: authentication information can be validated.
2057:
2058: =item passwd
2059:
2060: Allow for a password to be set.
2061:
2062: =item makeuser
2063:
2064: Make a user.
2065:
2066: =item passwd
2067:
2068: Allow for authentication mechanism and password to be changed.
2069:
2070: =item home
2071:
2072: Respond to a question "are you the home for a given user?"
2073:
2074: =item update
2075:
2076: Update contents of a subscribed resource.
2077:
2078: =item unsubscribe
2079:
2080: The server is unsubscribing from a resource.
2081:
2082: =item subscribe
2083:
2084: The server is subscribing to a resource.
2085:
2086: =item log
2087:
2088: Place in B<logs/lond.log>
2089:
2090: =item put
2091:
2092: stores hash in namespace
2093:
2094: =item rolesput
2095:
2096: put a role into a user's environment
2097:
2098: =item get
2099:
2100: returns hash with keys from array
2101: reference filled in from namespace
2102:
2103: =item eget
2104:
2105: returns hash with keys from array
2106: reference filled in from namesp (encrypts the return communication)
2107:
2108: =item rolesget
2109:
2110: get a role from a user's environment
2111:
2112: =item del
2113:
2114: deletes keys out of array from namespace
2115:
2116: =item keys
2117:
2118: returns namespace keys
2119:
2120: =item dump
2121:
2122: dumps the complete (or key matching regexp) namespace into a hash
2123:
2124: =item store
2125:
2126: stores hash permanently
2127: for this url; hashref needs to be given and should be a \%hashname; the
2128: remaining args aren't required and if they aren't passed or are '' they will
2129: be derived from the ENV
2130:
2131: =item restore
2132:
2133: returns a hash for a given url
2134:
2135: =item querysend
2136:
2137: Tells client about the lonsql process that has been launched in response
2138: to a sent query.
2139:
2140: =item queryreply
2141:
2142: Accept information from lonsql and make appropriate storage in temporary
2143: file space.
2144:
2145: =item idput
2146:
2147: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2148: for each student, defined perhaps by the institutional Registrar.)
2149:
2150: =item idget
2151:
2152: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2153: for each student, defined perhaps by the institutional Registrar.)
2154:
2155: =item tmpput
2156:
2157: Accept and store information in temporary space.
2158:
2159: =item tmpget
2160:
2161: Send along temporarily stored information.
2162:
2163: =item ls
2164:
2165: List part of a user's directory.
2166:
2167: =item Hanging up (exit or init)
2168:
2169: What to do when a client tells the server that they (the client)
2170: are leaving the network.
2171:
2172: =item unknown command
2173:
2174: If B<lond> is sent an unknown command (not in the list above),
2175: it replys to the client "unknown_cmd".
2176:
2177: =item UNKNOWN CLIENT
2178:
2179: If the anti-spoofing algorithm cannot verify the client,
2180: the client is rejected (with a "refused" message sent
2181: to the client, and the connection is closed.
2182:
2183: =back
2184:
2185: =head1 PREREQUISITES
2186:
2187: IO::Socket
2188: IO::File
2189: Apache::File
2190: Symbol
2191: POSIX
2192: Crypt::IDEA
2193: LWP::UserAgent()
2194: GDBM_File
2195: Authen::Krb4
2196: Authen::Krb5
2197:
2198: =head1 COREQUISITES
2199:
2200: =head1 OSNAMES
2201:
2202: linux
2203:
2204: =head1 SCRIPT CATEGORIES
2205:
2206: Server/Process
2207:
2208: =cut
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