1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.110 2003/03/02 03:58:55 www 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\n";
860: }
861: }
862: }
863: unless ($fperror) {
864: my $result=&make_passwd_file($uname, $umode,$npass,
865: $passfilename);
866: print $client $result;
867: } else {
868: print $client "$fperror\n";
869: }
870: }
871: } else {
872: print $client "refused\n";
873: }
874: umask($oldumask);
875: # -------------------------------------------------------------- changeuserauth
876: } elsif ($userinput =~ /^changeuserauth/) {
877: &Debug("Changing authorization");
878: if ($wasenc==1) {
879: my
880: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
881: chomp($npass);
882: &Debug("cmd = ".$cmd." domain= ".$udom.
883: "uname =".$uname." umode= ".$umode);
884: $npass=&unescape($npass);
885: my $proname=&propath($udom,$uname);
886: my $passfilename="$proname/passwd";
887: if ($udom ne $perlvar{'lonDefDomain'}) {
888: print $client "not_right_domain\n";
889: } else {
890: my $result=&make_passwd_file($uname, $umode,$npass,
891: $passfilename);
892: print $client $result;
893: }
894: } else {
895: print $client "refused\n";
896: }
897: # ------------------------------------------------------------------------ home
898: } elsif ($userinput =~ /^home/) {
899: my ($cmd,$udom,$uname)=split(/:/,$userinput);
900: chomp($uname);
901: my $proname=propath($udom,$uname);
902: if (-e $proname) {
903: print $client "found\n";
904: } else {
905: print $client "not_found\n";
906: }
907: # ---------------------------------------------------------------------- update
908: } elsif ($userinput =~ /^update/) {
909: my ($cmd,$fname)=split(/:/,$userinput);
910: my $ownership=ishome($fname);
911: if ($ownership eq 'not_owner') {
912: if (-e $fname) {
913: my ($dev,$ino,$mode,$nlink,
914: $uid,$gid,$rdev,$size,
915: $atime,$mtime,$ctime,
916: $blksize,$blocks)=stat($fname);
917: $now=time;
918: $since=$now-$atime;
919: if ($since>$perlvar{'lonExpire'}) {
920: $reply=
921: reply("unsub:$fname","$hostid{$clientip}");
922: unlink("$fname");
923: } else {
924: my $transname="$fname.in.transfer";
925: my $remoteurl=
926: reply("sub:$fname","$hostid{$clientip}");
927: my $response;
928: {
929: my $ua=new LWP::UserAgent;
930: my $request=new HTTP::Request('GET',"$remoteurl");
931: $response=$ua->request($request,$transname);
932: }
933: if ($response->is_error()) {
934: unlink($transname);
935: my $message=$response->status_line;
936: &logthis(
937: "LWP GET: $message for $fname ($remoteurl)");
938: } else {
939: if ($remoteurl!~/\.meta$/) {
940: my $ua=new LWP::UserAgent;
941: my $mrequest=
942: new HTTP::Request('GET',$remoteurl.'.meta');
943: my $mresponse=
944: $ua->request($mrequest,$fname.'.meta');
945: if ($mresponse->is_error()) {
946: unlink($fname.'.meta');
947: }
948: }
949: rename($transname,$fname);
950: }
951: }
952: print $client "ok\n";
953: } else {
954: print $client "not_found\n";
955: }
956: } else {
957: print $client "rejected\n";
958: }
959: # -------------------------------------- fetch a user file from a remote server
960: } elsif ($userinput =~ /^fetchuserfile/) {
961: my ($cmd,$fname)=split(/:/,$userinput);
962: my ($udom,$uname,$ufile)=split(/\//,$fname);
963: my $udir=propath($udom,$uname).'/userfiles';
964: unless (-e $udir) { mkdir($udir,0770); }
965: if (-e $udir) {
966: $ufile=~s/^[\.\~]+//;
967: $ufile=~s/\///g;
968: my $transname=$udir.'/'.$ufile;
969: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
970: my $response;
971: {
972: my $ua=new LWP::UserAgent;
973: my $request=new HTTP::Request('GET',"$remoteurl");
974: $response=$ua->request($request,$transname);
975: }
976: if ($response->is_error()) {
977: unlink($transname);
978: my $message=$response->status_line;
979: &logthis(
980: "LWP GET: $message for $fname ($remoteurl)");
981: print $client "failed\n";
982: } else {
983: print $client "ok\n";
984: }
985: } else {
986: print $client "not_home\n";
987: }
988: # ------------------------------------------ authenticate access to a user file
989: } elsif ($userinput =~ /^tokenauthuserfile/) {
990: my ($cmd,$fname,$session)=split(/:/,$userinput);
991: chomp($session);
992: $reply='non_auth';
993: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
994: $session.'.id')) {
995: while ($line=<ENVIN>) {
996: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
997: }
998: close(ENVIN);
999: print $client $reply."\n";
1000: } else {
1001: print $client "invalid_token\n";
1002: }
1003: # ----------------------------------------------------------------- unsubscribe
1004: } elsif ($userinput =~ /^unsub/) {
1005: my ($cmd,$fname)=split(/:/,$userinput);
1006: if (-e $fname) {
1007: print $client &unsub($client,$fname,$clientip);
1008: } else {
1009: print $client "not_found\n";
1010: }
1011: # ------------------------------------------------------------------- subscribe
1012: } elsif ($userinput =~ /^sub/) {
1013: print $client &subscribe($userinput,$clientip);
1014: # ------------------------------------------------------------- current version
1015: } elsif ($userinput =~ /^currentversion/) {
1016: my ($cmd,$fname)=split(/:/,$userinput);
1017: print $client ¤tversion($fname)."\n";
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 $client "error: ".($!+0)
1031: ." IO::File->new Failed\n";
1032: }
1033: }
1034: # ------------------------------------------------------------------------- put
1035: } elsif ($userinput =~ /^put/) {
1036: my ($cmd,$udom,$uname,$namespace,$what)
1037: =split(/:/,$userinput);
1038: $namespace=~s/\//\_/g;
1039: $namespace=~s/\W//g;
1040: if ($namespace ne 'roles') {
1041: chomp($what);
1042: my $proname=propath($udom,$uname);
1043: my $now=time;
1044: unless ($namespace=~/^nohist\_/) {
1045: my $hfh;
1046: if (
1047: $hfh=IO::File->new(">>$proname/$namespace.hist")
1048: ) { print $hfh "P:$now:$what\n"; }
1049: }
1050: my @pairs=split(/\&/,$what);
1051: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1052: foreach $pair (@pairs) {
1053: ($key,$value)=split(/=/,$pair);
1054: $hash{$key}=$value;
1055: }
1056: if (untie(%hash)) {
1057: print $client "ok\n";
1058: } else {
1059: print $client "error: ".($!+0)
1060: ." untie(GDBM) failed\n";
1061: }
1062: } else {
1063: print $client "error: ".($!)
1064: ." tie(GDBM) Failed\n";
1065: }
1066: } else {
1067: print $client "refused\n";
1068: }
1069: # -------------------------------------------------------------------- rolesput
1070: } elsif ($userinput =~ /^rolesput/) {
1071: &Debug("rolesput");
1072: if ($wasenc==1) {
1073: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1074: =split(/:/,$userinput);
1075: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1076: "user = ".$exeuser." udom=".$udom.
1077: "what = ".$what);
1078: my $namespace='roles';
1079: chomp($what);
1080: my $proname=propath($udom,$uname);
1081: my $now=time;
1082: {
1083: my $hfh;
1084: if (
1085: $hfh=IO::File->new(">>$proname/$namespace.hist")
1086: ) {
1087: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1088: }
1089: }
1090: my @pairs=split(/\&/,$what);
1091: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1092: foreach $pair (@pairs) {
1093: ($key,$value)=split(/=/,$pair);
1094: &ManagePermissions($key, $udom, $uname,
1095: &GetAuthType( $udom,
1096: $uname));
1097: $hash{$key}=$value;
1098:
1099: }
1100: if (untie(%hash)) {
1101: print $client "ok\n";
1102: } else {
1103: print $client "error: ".($!+0)
1104: ." untie(GDBM) Failed\n";
1105: }
1106: } else {
1107: print $client "error: ".($!+0)
1108: ." tie(GDBM) Failed\n";
1109: }
1110: } else {
1111: print $client "refused\n";
1112: }
1113: # ------------------------------------------------------------------------- get
1114: } elsif ($userinput =~ /^get/) {
1115: my ($cmd,$udom,$uname,$namespace,$what)
1116: =split(/:/,$userinput);
1117: $namespace=~s/\//\_/g;
1118: $namespace=~s/\W//g;
1119: chomp($what);
1120: my @queries=split(/\&/,$what);
1121: my $proname=propath($udom,$uname);
1122: my $qresult='';
1123: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1124: for ($i=0;$i<=$#queries;$i++) {
1125: $qresult.="$hash{$queries[$i]}&";
1126: }
1127: if (untie(%hash)) {
1128: $qresult=~s/\&$//;
1129: print $client "$qresult\n";
1130: } else {
1131: print $client "error: ".($!+0)
1132: ." untie(GDBM) Failed\n";
1133: }
1134: } else {
1135: print $client "error: ".($!+0)
1136: ." tie(GDBM) Failed\n";
1137: }
1138: # ------------------------------------------------------------------------ eget
1139: } elsif ($userinput =~ /^eget/) {
1140: my ($cmd,$udom,$uname,$namespace,$what)
1141: =split(/:/,$userinput);
1142: $namespace=~s/\//\_/g;
1143: $namespace=~s/\W//g;
1144: chomp($what);
1145: my @queries=split(/\&/,$what);
1146: my $proname=propath($udom,$uname);
1147: my $qresult='';
1148: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1149: for ($i=0;$i<=$#queries;$i++) {
1150: $qresult.="$hash{$queries[$i]}&";
1151: }
1152: if (untie(%hash)) {
1153: $qresult=~s/\&$//;
1154: if ($cipher) {
1155: my $cmdlength=length($qresult);
1156: $qresult.=" ";
1157: my $encqresult='';
1158: for
1159: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1160: $encqresult.=
1161: unpack("H16",
1162: $cipher->encrypt(substr($qresult,$encidx,8)));
1163: }
1164: print $client "enc:$cmdlength:$encqresult\n";
1165: } else {
1166: print $client "error:no_key\n";
1167: }
1168: } else {
1169: print $client "error: ".($!+0)
1170: ." untie(GDBM) Failed\n";
1171: }
1172: } else {
1173: print $client "error: ".($!+0)
1174: ." tie(GDBM) Failed\n";
1175: }
1176: # ------------------------------------------------------------------------- del
1177: } elsif ($userinput =~ /^del/) {
1178: my ($cmd,$udom,$uname,$namespace,$what)
1179: =split(/:/,$userinput);
1180: $namespace=~s/\//\_/g;
1181: $namespace=~s/\W//g;
1182: chomp($what);
1183: my $proname=propath($udom,$uname);
1184: my $now=time;
1185: unless ($namespace=~/^nohist\_/) {
1186: my $hfh;
1187: if (
1188: $hfh=IO::File->new(">>$proname/$namespace.hist")
1189: ) { print $hfh "D:$now:$what\n"; }
1190: }
1191: my @keys=split(/\&/,$what);
1192: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1193: foreach $key (@keys) {
1194: delete($hash{$key});
1195: }
1196: if (untie(%hash)) {
1197: print $client "ok\n";
1198: } else {
1199: print $client "error: ".($!+0)
1200: ." untie(GDBM) Failed\n";
1201: }
1202: } else {
1203: print $client "error: ".($!+0)
1204: ." tie(GDBM) Failed\n";
1205: }
1206: # ------------------------------------------------------------------------ keys
1207: } elsif ($userinput =~ /^keys/) {
1208: my ($cmd,$udom,$uname,$namespace)
1209: =split(/:/,$userinput);
1210: $namespace=~s/\//\_/g;
1211: $namespace=~s/\W//g;
1212: my $proname=propath($udom,$uname);
1213: my $qresult='';
1214: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1215: foreach $key (keys %hash) {
1216: $qresult.="$key&";
1217: }
1218: if (untie(%hash)) {
1219: $qresult=~s/\&$//;
1220: print $client "$qresult\n";
1221: } else {
1222: print $client "error: ".($!+0)
1223: ." untie(GDBM) Failed\n";
1224: }
1225: } else {
1226: print $client "error: ".($!+0)
1227: ." tie(GDBM) Failed\n";
1228: }
1229: # ----------------------------------------------------------------- dumpcurrent
1230: } elsif ($userinput =~ /^currentdump/) {
1231: my ($cmd,$udom,$uname,$namespace)
1232: =split(/:/,$userinput);
1233: $namespace=~s/\//\_/g;
1234: $namespace=~s/\W//g;
1235: my $qresult='';
1236: my $proname=propath($udom,$uname);
1237: if (tie(%hash,'GDBM_File',
1238: "$proname/$namespace.db",
1239: &GDBM_READER(),0640)) {
1240: # Structure of %data:
1241: # $data{$symb}->{$parameter}=$value;
1242: # $data{$symb}->{'v.'.$parameter}=$version;
1243: # since $parameter will be unescaped, we do not
1244: # have to worry about silly parameter names...
1245: my %data = ();
1246: while (my ($key,$value) = each(%hash)) {
1247: my ($v,$symb,$param) = split(/:/,$key);
1248: next if ($v eq 'version' || $symb eq 'keys');
1249: next if (exists($data{$symb}) &&
1250: exists($data{$symb}->{$param}) &&
1251: $data{$symb}->{'v.'.$param} > $v);
1252: $data{$symb}->{$param}=$value;
1253: $data{$symb}->{'v.'.$param}=$v;
1254: }
1255: if (untie(%hash)) {
1256: while (my ($symb,$param_hash) = each(%data)) {
1257: while(my ($param,$value) = each (%$param_hash)){
1258: next if ($param =~ /^v\./);
1259: $qresult.=$symb.':'.$param.'='.$value.'&';
1260: }
1261: }
1262: chop($qresult);
1263: print $client "$qresult\n";
1264: } else {
1265: print $client "error: ".($!+0)
1266: ." untie(GDBM) Failed\n";
1267: }
1268: } else {
1269: print $client "error: ".($!+0)
1270: ." tie(GDBM) Failed\n";
1271: }
1272: # ------------------------------------------------------------------------ dump
1273: } elsif ($userinput =~ /^dump/) {
1274: my ($cmd,$udom,$uname,$namespace,$regexp)
1275: =split(/:/,$userinput);
1276: $namespace=~s/\//\_/g;
1277: $namespace=~s/\W//g;
1278: if (defined($regexp)) {
1279: $regexp=&unescape($regexp);
1280: } else {
1281: $regexp='.';
1282: }
1283: my $qresult='';
1284: my $proname=propath($udom,$uname);
1285: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1286: study($regexp);
1287: while (($key,$value) = each(%hash)) {
1288: if ($regexp eq '.') {
1289: $qresult.=$key.'='.$value.'&';
1290: } else {
1291: my $unescapeKey = &unescape($key);
1292: if (eval('$unescapeKey=~/$regexp/')) {
1293: $qresult.="$key=$value&";
1294: }
1295: }
1296: }
1297: if (untie(%hash)) {
1298: chop($qresult);
1299: print $client "$qresult\n";
1300: } else {
1301: print $client "error: ".($!+0)
1302: ." untie(GDBM) Failed\n";
1303: }
1304: } else {
1305: print $client "error: ".($!+0)
1306: ." tie(GDBM) Failed\n";
1307: }
1308: # ----------------------------------------------------------------------- store
1309: } elsif ($userinput =~ /^store/) {
1310: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1311: =split(/:/,$userinput);
1312: $namespace=~s/\//\_/g;
1313: $namespace=~s/\W//g;
1314: if ($namespace ne 'roles') {
1315: chomp($what);
1316: my $proname=propath($udom,$uname);
1317: my $now=time;
1318: unless ($namespace=~/^nohist\_/) {
1319: my $hfh;
1320: if (
1321: $hfh=IO::File->new(">>$proname/$namespace.hist")
1322: ) { print $hfh "P:$now:$rid:$what\n"; }
1323: }
1324: my @pairs=split(/\&/,$what);
1325:
1326: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1327: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1328: my $key;
1329: $hash{"version:$rid"}++;
1330: my $version=$hash{"version:$rid"};
1331: my $allkeys='';
1332: foreach $pair (@pairs) {
1333: ($key,$value)=split(/=/,$pair);
1334: $allkeys.=$key.':';
1335: $hash{"$version:$rid:$key"}=$value;
1336: }
1337: $hash{"$version:$rid:timestamp"}=$now;
1338: $allkeys.='timestamp';
1339: $hash{"$version:keys:$rid"}=$allkeys;
1340: if (untie(%hash)) {
1341: print $client "ok\n";
1342: } else {
1343: print $client "error: ".($!+0)
1344: ." untie(GDBM) Failed\n";
1345: }
1346: } else {
1347: print $client "error: ".($!+0)
1348: ." tie(GDBM) Failed\n";
1349: }
1350: } else {
1351: print $client "refused\n";
1352: }
1353: # --------------------------------------------------------------------- restore
1354: } elsif ($userinput =~ /^restore/) {
1355: my ($cmd,$udom,$uname,$namespace,$rid)
1356: =split(/:/,$userinput);
1357: $namespace=~s/\//\_/g;
1358: $namespace=~s/\W//g;
1359: chomp($rid);
1360: my $proname=propath($udom,$uname);
1361: my $qresult='';
1362: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1363: my $version=$hash{"version:$rid"};
1364: $qresult.="version=$version&";
1365: my $scope;
1366: for ($scope=1;$scope<=$version;$scope++) {
1367: my $vkeys=$hash{"$scope:keys:$rid"};
1368: my @keys=split(/:/,$vkeys);
1369: my $key;
1370: $qresult.="$scope:keys=$vkeys&";
1371: foreach $key (@keys) {
1372: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1373: }
1374: }
1375: if (untie(%hash)) {
1376: $qresult=~s/\&$//;
1377: print $client "$qresult\n";
1378: } else {
1379: print $client "error: ".($!+0)
1380: ." untie(GDBM) Failed\n";
1381: }
1382: } else {
1383: print $client "error: ".($!+0)
1384: ." tie(GDBM) Failed\n";
1385: }
1386: # -------------------------------------------------------------------- chatsend
1387: } elsif ($userinput =~ /^chatsend/) {
1388: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1389: &chatadd($cdom,$cnum,$newpost);
1390: print $client "ok\n";
1391: # -------------------------------------------------------------------- chatretr
1392: } elsif ($userinput =~ /^chatretr/) {
1393: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1394: my $reply='';
1395: foreach (&getchat($cdom,$cnum)) {
1396: $reply.=&escape($_).':';
1397: }
1398: $reply=~s/\:$//;
1399: print $client $reply."\n";
1400: # ------------------------------------------------------------------- querysend
1401: } elsif ($userinput =~ /^querysend/) {
1402: my ($cmd,$query,
1403: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1404: $query=~s/\n*$//g;
1405: print $client "".
1406: sqlreply("$hostid{$clientip}\&$query".
1407: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1408: # ------------------------------------------------------------------ queryreply
1409: } elsif ($userinput =~ /^queryreply/) {
1410: my ($cmd,$id,$reply)=split(/:/,$userinput);
1411: my $store;
1412: my $execdir=$perlvar{'lonDaemons'};
1413: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1414: $reply=~s/\&/\n/g;
1415: print $store $reply;
1416: close $store;
1417: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1418: print $store2 "done\n";
1419: close $store2;
1420: print $client "ok\n";
1421: }
1422: else {
1423: print $client "error: ".($!+0)
1424: ." IO::File->new Failed\n";
1425: }
1426: # ----------------------------------------------------------------------- idput
1427: } elsif ($userinput =~ /^idput/) {
1428: my ($cmd,$udom,$what)=split(/:/,$userinput);
1429: chomp($what);
1430: $udom=~s/\W//g;
1431: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1432: my $now=time;
1433: {
1434: my $hfh;
1435: if (
1436: $hfh=IO::File->new(">>$proname.hist")
1437: ) { print $hfh "P:$now:$what\n"; }
1438: }
1439: my @pairs=split(/\&/,$what);
1440: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1441: foreach $pair (@pairs) {
1442: ($key,$value)=split(/=/,$pair);
1443: $hash{$key}=$value;
1444: }
1445: if (untie(%hash)) {
1446: print $client "ok\n";
1447: } else {
1448: print $client "error: ".($!+0)
1449: ." untie(GDBM) Failed\n";
1450: }
1451: } else {
1452: print $client "error: ".($!+0)
1453: ." tie(GDBM) Failed\n";
1454: }
1455: # ----------------------------------------------------------------------- idget
1456: } elsif ($userinput =~ /^idget/) {
1457: my ($cmd,$udom,$what)=split(/:/,$userinput);
1458: chomp($what);
1459: $udom=~s/\W//g;
1460: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1461: my @queries=split(/\&/,$what);
1462: my $qresult='';
1463: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1464: for ($i=0;$i<=$#queries;$i++) {
1465: $qresult.="$hash{$queries[$i]}&";
1466: }
1467: if (untie(%hash)) {
1468: $qresult=~s/\&$//;
1469: print $client "$qresult\n";
1470: } else {
1471: print $client "error: ".($!+0)
1472: ." untie(GDBM) Failed\n";
1473: }
1474: } else {
1475: print $client "error: ".($!+0)
1476: ." tie(GDBM) Failed\n";
1477: }
1478: # ---------------------------------------------------------------------- tmpput
1479: } elsif ($userinput =~ /^tmpput/) {
1480: my ($cmd,$what)=split(/:/,$userinput);
1481: my $store;
1482: $tmpsnum++;
1483: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1484: $id=~s/\W/\_/g;
1485: $what=~s/\n//g;
1486: my $execdir=$perlvar{'lonDaemons'};
1487: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1488: print $store $what;
1489: close $store;
1490: print $client "$id\n";
1491: }
1492: else {
1493: print $client "error: ".($!+0)
1494: ."IO::File->new Failed\n";
1495: }
1496:
1497: # ---------------------------------------------------------------------- tmpget
1498: } elsif ($userinput =~ /^tmpget/) {
1499: my ($cmd,$id)=split(/:/,$userinput);
1500: chomp($id);
1501: $id=~s/\W/\_/g;
1502: my $store;
1503: my $execdir=$perlvar{'lonDaemons'};
1504: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1505: my $reply=<$store>;
1506: print $client "$reply\n";
1507: close $store;
1508: }
1509: else {
1510: print $client "error: ".($!+0)
1511: ."IO::File->new Failed\n";
1512: }
1513:
1514: # ---------------------------------------------------------------------- tmpdel
1515: } elsif ($userinput =~ /^tmpdel/) {
1516: my ($cmd,$id)=split(/:/,$userinput);
1517: chomp($id);
1518: $id=~s/\W/\_/g;
1519: my $execdir=$perlvar{'lonDaemons'};
1520: if (unlink("$execdir/tmp/$id.tmp")) {
1521: print $client "ok\n";
1522: } else {
1523: print $client "error: ".($!+0)
1524: ."Unlink tmp Failed\n";
1525: }
1526: # -------------------------------------------------------------------------- ls
1527: } elsif ($userinput =~ /^ls/) {
1528: my ($cmd,$ulsdir)=split(/:/,$userinput);
1529: my $ulsout='';
1530: my $ulsfn;
1531: if (-e $ulsdir) {
1532: if(-d $ulsdir) {
1533: if (opendir(LSDIR,$ulsdir)) {
1534: while ($ulsfn=readdir(LSDIR)) {
1535: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1536: $ulsout.=$ulsfn.'&'.
1537: join('&',@ulsstats).':';
1538: }
1539: closedir(LSDIR);
1540: }
1541: } else {
1542: my @ulsstats=stat($ulsdir);
1543: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1544: }
1545: } else {
1546: $ulsout='no_such_dir';
1547: }
1548: if ($ulsout eq '') { $ulsout='empty'; }
1549: print $client "$ulsout\n";
1550: # ------------------------------------------------------------------ Hanging up
1551: } elsif (($userinput =~ /^exit/) ||
1552: ($userinput =~ /^init/)) {
1553: &logthis(
1554: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1555: print $client "bye\n";
1556: $client->close();
1557: last;
1558: # ------------------------------------------------------------- unknown command
1559: } else {
1560: # unknown command
1561: print $client "unknown_cmd\n";
1562: }
1563: # -------------------------------------------------------------------- complete
1564: alarm(0);
1565: &status('Listening to '.$hostid{$clientip});
1566: }
1567: # --------------------------------------------- client unknown or fishy, refuse
1568: } else {
1569: print $client "refused\n";
1570: $client->close();
1571: &logthis("<font color=blue>WARNING: "
1572: ."Rejected client $clientip, closing connection</font>");
1573: }
1574: }
1575:
1576: # =============================================================================
1577:
1578: &logthis("<font color=red>CRITICAL: "
1579: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1580:
1581:
1582: # this exit is VERY important, otherwise the child will become
1583: # a producer of more and more children, forking yourself into
1584: # process death.
1585: exit;
1586:
1587: }
1588:
1589:
1590: #
1591: # Checks to see if the input roleput request was to set
1592: # an author role. If so, invokes the lchtmldir script to set
1593: # up a correct public_html
1594: # Parameters:
1595: # request - The request sent to the rolesput subchunk.
1596: # We're looking for /domain/_au
1597: # domain - The domain in which the user is having roles doctored.
1598: # user - Name of the user for which the role is being put.
1599: # authtype - The authentication type associated with the user.
1600: #
1601: sub ManagePermissions
1602: {
1603: my $request = shift;
1604: my $domain = shift;
1605: my $user = shift;
1606: my $authtype= shift;
1607:
1608: # See if the request is of the form /$domain/_au
1609:
1610: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1611: my $execdir = $perlvar{'lonDaemons'};
1612: my $userhome= "/home/$user" ;
1613: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1614: system("$execdir/lchtmldir $userhome $user $authtype");
1615: }
1616: }
1617: #
1618: # GetAuthType - Determines the authorization type of a user in a domain.
1619:
1620: # Returns the authorization type or nouser if there is no such user.
1621: #
1622: sub GetAuthType
1623: {
1624: my $domain = shift;
1625: my $user = shift;
1626:
1627: Debug("GetAuthType( $domain, $user ) \n");
1628: my $proname = &propath($domain, $user);
1629: my $passwdfile = "$proname/passwd";
1630: if( -e $passwdfile ) {
1631: my $pf = IO::File->new($passwdfile);
1632: my $realpassword = <$pf>;
1633: chomp($realpassword);
1634: Debug("Password info = $realpassword\n");
1635: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1636: Debug("Authtype = $authtype, content = $contentpwd\n");
1637: my $availinfo = '';
1638: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1639: $availinfo = $contentpwd;
1640: }
1641:
1642: return "$authtype:$availinfo";
1643: }
1644: else {
1645: Debug("Returning nouser");
1646: return "nouser";
1647: }
1648: }
1649:
1650: sub addline {
1651: my ($fname,$hostid,$ip,$newline)=@_;
1652: my $contents;
1653: my $found=0;
1654: my $expr='^'.$hostid.':'.$ip.':';
1655: $expr =~ s/\./\\\./g;
1656: if ($sh=IO::File->new("$fname.subscription")) {
1657: while (my $subline=<$sh>) {
1658: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1659: }
1660: $sh->close();
1661: }
1662: $sh=IO::File->new(">$fname.subscription");
1663: if ($contents) { print $sh $contents; }
1664: if ($newline) { print $sh $newline; }
1665: $sh->close();
1666: return $found;
1667: }
1668:
1669: sub getchat {
1670: my ($cdom,$cname)=@_;
1671: my %hash;
1672: my $proname=&propath($cdom,$cname);
1673: my @entries=();
1674: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1675: &GDBM_READER(),0640)) {
1676: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1677: untie %hash;
1678: }
1679: return @entries;
1680: }
1681:
1682: sub chatadd {
1683: my ($cdom,$cname,$newchat)=@_;
1684: my %hash;
1685: my $proname=&propath($cdom,$cname);
1686: my @entries=();
1687: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1688: &GDBM_WRCREAT(),0640)) {
1689: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1690: my $time=time;
1691: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1692: my ($thentime,$idnum)=split(/\_/,$lastid);
1693: my $newid=$time.'_000000';
1694: if ($thentime==$time) {
1695: $idnum=~s/^0+//;
1696: $idnum++;
1697: $idnum=substr('000000'.$idnum,-6,6);
1698: $newid=$time.'_'.$idnum;
1699: }
1700: $hash{$newid}=$newchat;
1701: my $expired=$time-3600;
1702: foreach (keys %hash) {
1703: my ($thistime)=($_=~/(\d+)\_/);
1704: if ($thistime<$expired) {
1705: delete $hash{$_};
1706: }
1707: }
1708: untie %hash;
1709: }
1710: }
1711:
1712: sub unsub {
1713: my ($fname,$clientip)=@_;
1714: my $result;
1715: if (unlink("$fname.$hostid{$clientip}")) {
1716: $result="ok\n";
1717: } else {
1718: $result="not_subscribed\n";
1719: }
1720: if (-e "$fname.subscription") {
1721: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1722: if ($found) { $result="ok\n"; }
1723: } else {
1724: if ($result != "ok\n") { $result="not_subscribed\n"; }
1725: }
1726: return $result;
1727: }
1728:
1729: sub currentversion {
1730: my $fname=shift;
1731: my $version=-1;
1732: my $ulsdir='';
1733: if ($fname=~/^(.+)\/[^\/]+$/) {
1734: $ulsdir=$1;
1735: }
1736: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1737: $fname=~s/\.(\w+(?:\.meta)*)$/\.\(\\d\+\)\.$1\$/;
1738:
1739: if (-e $fname) { $version=1; }
1740: if (-e $ulsdir) {
1741: if(-d $ulsdir) {
1742: if (opendir(LSDIR,$ulsdir)) {
1743: while ($ulsfn=readdir(LSDIR)) {
1744: # see if this is a regular file (ignore links produced earlier)
1745: my $thisfile=$ulsdir.'/'.$ulsfn;
1746: unless (-l $thisfile) {
1747: if ($thisfile=~/$fname/) {
1748: if ($1>$version) { $version=$1; }
1749: }
1750: }
1751: }
1752: closedir(LSDIR);
1753: $version++;
1754: }
1755: }
1756: }
1757: return $version;
1758: }
1759:
1760: sub thisversion {
1761: my $fname=shift;
1762: my $version=-1;
1763: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1764: $version=$1;
1765: }
1766: return $version;
1767: }
1768:
1769: sub subscribe {
1770: my ($userinput,$clientip)=@_;
1771: my $result;
1772: my ($cmd,$fname)=split(/:/,$userinput);
1773: my $ownership=&ishome($fname);
1774: if ($ownership eq 'owner') {
1775: # explitly asking for the current version?
1776: unless (-e $fname) {
1777: my $currentversion=¤tversion($fname);
1778: if (&thisversion($fname)==$currentversion) {
1779: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1780: my $root=$1;
1781: my $extension=$2;
1782: symlink($root.'.'.$extension,
1783: $root.'.'.$currentversion.'.'.$extension);
1784: unless ($extension=~/\.meta$/) {
1785: symlink($root.'.'.$extension.'.meta',
1786: $root.'.'.$currentversion.'.'.$extension.'.meta');
1787: }
1788: }
1789: }
1790: }
1791: if (-e $fname) {
1792: if (-d $fname) {
1793: $result="directory\n";
1794: } else {
1795: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1796: $now=time;
1797: my $found=&addline($fname,$hostid{$clientip},$clientip,
1798: "$hostid{$clientip}:$clientip:$now\n");
1799: if ($found) { $result="$fname\n"; }
1800: # if they were subscribed to only meta data, delete that
1801: # subscription, when you subscribe to a file you also get
1802: # the metadata
1803: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1804: $fname=~s/\/home\/httpd\/html\/res/raw/;
1805: $fname="http://$thisserver/".$fname;
1806: $result="$fname\n";
1807: }
1808: } else {
1809: $result="not_found\n";
1810: }
1811: } else {
1812: $result="rejected\n";
1813: }
1814: return $result;
1815: }
1816:
1817: sub make_passwd_file {
1818: my ($uname, $umode,$npass,$passfilename)=@_;
1819: my $result="ok\n";
1820: if ($umode eq 'krb4' or $umode eq 'krb5') {
1821: {
1822: my $pf = IO::File->new(">$passfilename");
1823: print $pf "$umode:$npass\n";
1824: }
1825: } elsif ($umode eq 'internal') {
1826: my $salt=time;
1827: $salt=substr($salt,6,2);
1828: my $ncpass=crypt($npass,$salt);
1829: {
1830: &Debug("Creating internal auth");
1831: my $pf = IO::File->new(">$passfilename");
1832: print $pf "internal:$ncpass\n";
1833: }
1834: } elsif ($umode eq 'localauth') {
1835: {
1836: my $pf = IO::File->new(">$passfilename");
1837: print $pf "localauth:$npass\n";
1838: }
1839: } elsif ($umode eq 'unix') {
1840: {
1841: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1842: {
1843: &Debug("Executing external: ".$execpath);
1844: &Debug("user = ".$uname.", Password =". $npass);
1845: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
1846: print $se "$uname\n";
1847: print $se "$npass\n";
1848: print $se "$npass\n";
1849: }
1850: my $useraddok = $?;
1851: if($useraddok > 0) {
1852: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1853: }
1854: my $pf = IO::File->new(">$passfilename");
1855: print $pf "unix:\n";
1856: }
1857: } elsif ($umode eq 'none') {
1858: {
1859: my $pf = IO::File->new(">$passfilename");
1860: print $pf "none:\n";
1861: }
1862: } else {
1863: $result="auth_mode_error\n";
1864: }
1865: return $result;
1866: }
1867:
1868: # ----------------------------------- POD (plain old documentation, CPAN style)
1869:
1870: =head1 NAME
1871:
1872: lond - "LON Daemon" Server (port "LOND" 5663)
1873:
1874: =head1 SYNOPSIS
1875:
1876: Usage: B<lond>
1877:
1878: Should only be run as user=www. This is a command-line script which
1879: is invoked by B<loncron>. There is no expectation that a typical user
1880: will manually start B<lond> from the command-line. (In other words,
1881: DO NOT START B<lond> YOURSELF.)
1882:
1883: =head1 DESCRIPTION
1884:
1885: There are two characteristics associated with the running of B<lond>,
1886: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1887: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1888: subscriptions, etc). These are described in two large
1889: sections below.
1890:
1891: B<PROCESS MANAGEMENT>
1892:
1893: Preforker - server who forks first. Runs as a daemon. HUPs.
1894: Uses IDEA encryption
1895:
1896: B<lond> forks off children processes that correspond to the other servers
1897: in the network. Management of these processes can be done at the
1898: parent process level or the child process level.
1899:
1900: B<logs/lond.log> is the location of log messages.
1901:
1902: The process management is now explained in terms of linux shell commands,
1903: subroutines internal to this code, and signal assignments:
1904:
1905: =over 4
1906:
1907: =item *
1908:
1909: PID is stored in B<logs/lond.pid>
1910:
1911: This is the process id number of the parent B<lond> process.
1912:
1913: =item *
1914:
1915: SIGTERM and SIGINT
1916:
1917: Parent signal assignment:
1918: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1919:
1920: Child signal assignment:
1921: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1922: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1923: to restart a new child.)
1924:
1925: Command-line invocations:
1926: B<kill> B<-s> SIGTERM I<PID>
1927: B<kill> B<-s> SIGINT I<PID>
1928:
1929: Subroutine B<HUNTSMAN>:
1930: This is only invoked for the B<lond> parent I<PID>.
1931: This kills all the children, and then the parent.
1932: The B<lonc.pid> file is cleared.
1933:
1934: =item *
1935:
1936: SIGHUP
1937:
1938: Current bug:
1939: This signal can only be processed the first time
1940: on the parent process. Subsequent SIGHUP signals
1941: have no effect.
1942:
1943: Parent signal assignment:
1944: $SIG{HUP} = \&HUPSMAN;
1945:
1946: Child signal assignment:
1947: none (nothing happens)
1948:
1949: Command-line invocations:
1950: B<kill> B<-s> SIGHUP I<PID>
1951:
1952: Subroutine B<HUPSMAN>:
1953: This is only invoked for the B<lond> parent I<PID>,
1954: This kills all the children, and then the parent.
1955: The B<lond.pid> file is cleared.
1956:
1957: =item *
1958:
1959: SIGUSR1
1960:
1961: Parent signal assignment:
1962: $SIG{USR1} = \&USRMAN;
1963:
1964: Child signal assignment:
1965: $SIG{USR1}= \&logstatus;
1966:
1967: Command-line invocations:
1968: B<kill> B<-s> SIGUSR1 I<PID>
1969:
1970: Subroutine B<USRMAN>:
1971: When invoked for the B<lond> parent I<PID>,
1972: SIGUSR1 is sent to all the children, and the status of
1973: each connection is logged.
1974:
1975: =item *
1976:
1977: SIGCHLD
1978:
1979: Parent signal assignment:
1980: $SIG{CHLD} = \&REAPER;
1981:
1982: Child signal assignment:
1983: none
1984:
1985: Command-line invocations:
1986: B<kill> B<-s> SIGCHLD I<PID>
1987:
1988: Subroutine B<REAPER>:
1989: This is only invoked for the B<lond> parent I<PID>.
1990: Information pertaining to the child is removed.
1991: The socket port is cleaned up.
1992:
1993: =back
1994:
1995: B<SERVER-SIDE ACTIVITIES>
1996:
1997: Server-side information can be accepted in an encrypted or non-encrypted
1998: method.
1999:
2000: =over 4
2001:
2002: =item ping
2003:
2004: Query a client in the hosts.tab table; "Are you there?"
2005:
2006: =item pong
2007:
2008: Respond to a ping query.
2009:
2010: =item ekey
2011:
2012: Read in encrypted key, make cipher. Respond with a buildkey.
2013:
2014: =item load
2015:
2016: Respond with CPU load based on a computation upon /proc/loadavg.
2017:
2018: =item currentauth
2019:
2020: Reply with current authentication information (only over an
2021: encrypted channel).
2022:
2023: =item auth
2024:
2025: Only over an encrypted channel, reply as to whether a user's
2026: authentication information can be validated.
2027:
2028: =item passwd
2029:
2030: Allow for a password to be set.
2031:
2032: =item makeuser
2033:
2034: Make a user.
2035:
2036: =item passwd
2037:
2038: Allow for authentication mechanism and password to be changed.
2039:
2040: =item home
2041:
2042: Respond to a question "are you the home for a given user?"
2043:
2044: =item update
2045:
2046: Update contents of a subscribed resource.
2047:
2048: =item unsubscribe
2049:
2050: The server is unsubscribing from a resource.
2051:
2052: =item subscribe
2053:
2054: The server is subscribing to a resource.
2055:
2056: =item log
2057:
2058: Place in B<logs/lond.log>
2059:
2060: =item put
2061:
2062: stores hash in namespace
2063:
2064: =item rolesput
2065:
2066: put a role into a user's environment
2067:
2068: =item get
2069:
2070: returns hash with keys from array
2071: reference filled in from namespace
2072:
2073: =item eget
2074:
2075: returns hash with keys from array
2076: reference filled in from namesp (encrypts the return communication)
2077:
2078: =item rolesget
2079:
2080: get a role from a user's environment
2081:
2082: =item del
2083:
2084: deletes keys out of array from namespace
2085:
2086: =item keys
2087:
2088: returns namespace keys
2089:
2090: =item dump
2091:
2092: dumps the complete (or key matching regexp) namespace into a hash
2093:
2094: =item store
2095:
2096: stores hash permanently
2097: for this url; hashref needs to be given and should be a \%hashname; the
2098: remaining args aren't required and if they aren't passed or are '' they will
2099: be derived from the ENV
2100:
2101: =item restore
2102:
2103: returns a hash for a given url
2104:
2105: =item querysend
2106:
2107: Tells client about the lonsql process that has been launched in response
2108: to a sent query.
2109:
2110: =item queryreply
2111:
2112: Accept information from lonsql and make appropriate storage in temporary
2113: file space.
2114:
2115: =item idput
2116:
2117: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2118: for each student, defined perhaps by the institutional Registrar.)
2119:
2120: =item idget
2121:
2122: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2123: for each student, defined perhaps by the institutional Registrar.)
2124:
2125: =item tmpput
2126:
2127: Accept and store information in temporary space.
2128:
2129: =item tmpget
2130:
2131: Send along temporarily stored information.
2132:
2133: =item ls
2134:
2135: List part of a user's directory.
2136:
2137: =item Hanging up (exit or init)
2138:
2139: What to do when a client tells the server that they (the client)
2140: are leaving the network.
2141:
2142: =item unknown command
2143:
2144: If B<lond> is sent an unknown command (not in the list above),
2145: it replys to the client "unknown_cmd".
2146:
2147: =item UNKNOWN CLIENT
2148:
2149: If the anti-spoofing algorithm cannot verify the client,
2150: the client is rejected (with a "refused" message sent
2151: to the client, and the connection is closed.
2152:
2153: =back
2154:
2155: =head1 PREREQUISITES
2156:
2157: IO::Socket
2158: IO::File
2159: Apache::File
2160: Symbol
2161: POSIX
2162: Crypt::IDEA
2163: LWP::UserAgent()
2164: GDBM_File
2165: Authen::Krb4
2166: Authen::Krb5
2167:
2168: =head1 COREQUISITES
2169:
2170: =head1 OSNAMES
2171:
2172: linux
2173:
2174: =head1 SCRIPT CATEGORIES
2175:
2176: Server/Process
2177:
2178: =cut
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