File:
[LON-CAPA] /
loncom /
lond
Revision
1.115:
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Tue Mar 18 22:51:03 2003 UTC (21 years, 1 month ago) by
albertel
Branches:
MAIN
CVS tags:
HEAD
- Machines with multiple domains now supporteda somewhat
http://bugs.loncapa.org/show_bug.cgi?id=1320
- Requirements:
hosts.tab must have several enetries one for each hostid/domain
but the domain name and IP addresses must be the same
The last entry of the host must correspond with the entries in loncapa.conf
- Known isssues,
1) CSTR space has no domain info in it, username conflicts can occur
2) while you can add the Author role to user, if the role isn't the main domain they can't author
- Tested areas
1) Course creation
2) DOCS mods on course in main/non-main domain
3) problems in course in main/non-main domain
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.115 2003/03/18 22:51:03 albertel 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: use lib '/home/httpd/lib/perl/';
56: use LONCAPA::Configuration;
57:
58: use IO::Socket;
59: use IO::File;
60: use Apache::File;
61: use Symbol;
62: use POSIX;
63: use Crypt::IDEA;
64: use LWP::UserAgent();
65: use GDBM_File;
66: use Authen::Krb4;
67: use Authen::Krb5;
68: use lib '/home/httpd/lib/perl/';
69: use localauth;
70:
71: my $DEBUG = 0; # Non zero to enable debug log entries.
72:
73: my $status='';
74: my $lastlog='';
75:
76: my $currenthostid;
77: my $currentdomainid;
78: #
79: # The array below are password error strings."
80: #
81: my $lastpwderror = 13; # Largest error number from lcpasswd.
82: my @passwderrors = ("ok",
83: "lcpasswd must be run as user 'www'",
84: "lcpasswd got incorrect number of arguments",
85: "lcpasswd did not get the right nubmer of input text lines",
86: "lcpasswd too many simultaneous pwd changes in progress",
87: "lcpasswd User does not exist.",
88: "lcpasswd Incorrect current passwd",
89: "lcpasswd Unable to su to root.",
90: "lcpasswd Cannot set new passwd.",
91: "lcpasswd Username has invalid characters",
92: "lcpasswd Invalid characters in password",
93: "11", "12",
94: "lcpasswd Password mismatch");
95:
96:
97: # The array below are lcuseradd error strings.:
98:
99: my $lastadderror = 13;
100: my @adderrors = ("ok",
101: "User ID mismatch, lcuseradd must run as user www",
102: "lcuseradd Incorrect number of command line parameters must be 3",
103: "lcuseradd Incorrect number of stdinput lines, must be 3",
104: "lcuseradd Too many other simultaneous pwd changes in progress",
105: "lcuseradd User does not exist",
106: "lcuseradd Unabel to mak ewww member of users's group",
107: "lcuseradd Unable to su to root",
108: "lcuseradd Unable to set password",
109: "lcuseradd Usrname has invbalid charcters",
110: "lcuseradd Password has an invalid character",
111: "lcuseradd User already exists",
112: "lcuseradd Could not add user.",
113: "lcuseradd Password mismatch");
114:
115:
116: #
117: # Convert an error return code from lcpasswd to a string value.
118: #
119: sub lcpasswdstrerror {
120: my $ErrorCode = shift;
121: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
122: return "lcpasswd Unrecognized error return value ".$ErrorCode;
123: } else {
124: return $passwderrors[$ErrorCode];
125: }
126: }
127:
128: #
129: # Convert an error return code from lcuseradd to a string value:
130: #
131: sub lcuseraddstrerror {
132: my $ErrorCode = shift;
133: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
134: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
135: } else {
136: return $adderrors[$ErrorCode];
137: }
138: }
139:
140: # grabs exception and records it to log before exiting
141: sub catchexception {
142: my ($error)=@_;
143: $SIG{'QUIT'}='DEFAULT';
144: $SIG{__DIE__}='DEFAULT';
145: &logthis("<font color=red>CRITICAL: "
146: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
147: ."a crash with this error msg->[$error]</font>");
148: &logthis('Famous last words: '.$status.' - '.$lastlog);
149: if ($client) { print $client "error: $error\n"; }
150: $server->close();
151: die($error);
152: }
153:
154: sub timeout {
155: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
156: &catchexception('Timeout');
157: }
158: # -------------------------------- Set signal handlers to record abnormal exits
159:
160: $SIG{'QUIT'}=\&catchexception;
161: $SIG{__DIE__}=\&catchexception;
162:
163: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
164: &status("Read loncapa.conf and loncapa_apache.conf");
165: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
166: my %perlvar=%{$perlvarref};
167: undef $perlvarref;
168:
169: # ----------------------------- Make sure this process is running from user=www
170: my $wwwid=getpwnam('www');
171: if ($wwwid!=$<) {
172: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
173: $subj="LON: $currenthostid User ID mismatch";
174: system("echo 'User ID mismatch. lond must be run as user www.' |\
175: mailto $emailto -s '$subj' > /dev/null");
176: exit 1;
177: }
178:
179: # --------------------------------------------- Check if other instance running
180:
181: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
182:
183: if (-e $pidfile) {
184: my $lfh=IO::File->new("$pidfile");
185: my $pide=<$lfh>;
186: chomp($pide);
187: if (kill 0 => $pide) { die "already running"; }
188: }
189:
190: $PREFORK=4; # number of children to maintain, at least four spare
191:
192: # ------------------------------------------------------------- Read hosts file
193:
194: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
195:
196: while ($configline=<CONFIG>) {
197: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
198: chomp($ip); $ip=~s/\D+$//;
199: $hostid{$ip}=$id;
200: $hostdom{$id}=$domain;
201: $hostip{$id}=$ip;
202: if ($id eq $perlvar{'lonHostId'}) { $thisserver=$name; }
203: $PREFORK++;
204: }
205: close(CONFIG);
206:
207: # establish SERVER socket, bind and listen.
208: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
209: Type => SOCK_STREAM,
210: Proto => 'tcp',
211: Reuse => 1,
212: Listen => 10 )
213: or die "making socket: $@\n";
214:
215: # --------------------------------------------------------- Do global variables
216:
217: # global variables
218:
219: $MAX_CLIENTS_PER_CHILD = 50; # number of clients each child should
220: # process
221: %children = (); # keys are current child process IDs
222: $children = 0; # current number of children
223:
224: sub REAPER { # takes care of dead children
225: $SIG{CHLD} = \&REAPER;
226: my $pid = wait;
227: if (defined($children{$pid})) {
228: &logthis("Child $pid died");
229: $children --;
230: delete $children{$pid};
231: } else {
232: &logthis("Unknown Child $pid died");
233: }
234: }
235:
236: sub HUNTSMAN { # signal handler for SIGINT
237: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
238: kill 'INT' => keys %children;
239: &logthis("Free socket: ".shutdown($server,2)); # free up socket
240: my $execdir=$perlvar{'lonDaemons'};
241: unlink("$execdir/logs/lond.pid");
242: &logthis("<font color=red>CRITICAL: Shutting down</font>");
243: exit; # clean up with dignity
244: }
245:
246: sub HUPSMAN { # signal handler for SIGHUP
247: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
248: kill 'INT' => keys %children;
249: &logthis("Free socket: ".shutdown($server,2)); # free up socket
250: &logthis("<font color=red>CRITICAL: Restarting</font>");
251: unlink("$execdir/logs/lond.pid");
252: my $execdir=$perlvar{'lonDaemons'};
253: exec("$execdir/lond"); # here we go again
254: }
255:
256: sub checkchildren {
257: &initnewstatus();
258: &logstatus();
259: &logthis('Going to check on the children');
260: $docdir=$perlvar{'lonDocRoot'};
261: foreach (sort keys %children) {
262: sleep 1;
263: unless (kill 'USR1' => $_) {
264: &logthis ('Child '.$_.' is dead');
265: &logstatus($$.' is dead');
266: }
267: }
268: sleep 5;
269: $SIG{ALRM} = sub { die "timeout" };
270: $SIG{__DIE__} = 'DEFAULT';
271: foreach (sort keys %children) {
272: unless (-e "$docdir/lon-status/londchld/$_.txt") {
273: eval {
274: alarm(300);
275: &logthis('Child '.$_.' did not respond');
276: kill 9 => $_;
277: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
278: $subj="LON: $currenthostid killed lond process $_";
279: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
280: $execdir=$perlvar{'lonDaemons'};
281: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
282: alarm(0);
283: }
284: }
285: }
286: $SIG{ALRM} = 'DEFAULT';
287: $SIG{__DIE__} = \&cathcexception;
288: }
289:
290: # --------------------------------------------------------------------- Logging
291:
292: sub logthis {
293: my $message=shift;
294: my $execdir=$perlvar{'lonDaemons'};
295: my $fh=IO::File->new(">>$execdir/logs/lond.log");
296: my $now=time;
297: my $local=localtime($now);
298: $lastlog=$local.': '.$message;
299: print $fh "$local ($$): $message\n";
300: }
301:
302: # ------------------------- Conditional log if $DEBUG true.
303: sub Debug {
304: my $message = shift;
305: if($DEBUG) {
306: &logthis($message);
307: }
308: }
309: # ------------------------------------------------------------------ Log status
310:
311: sub logstatus {
312: my $docdir=$perlvar{'lonDocRoot'};
313: {
314: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
315: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
316: $fh->close();
317: }
318: {
319: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
320: print $fh $status."\n".$lastlog."\n".time;
321: $fh->close();
322: }
323: }
324:
325: sub initnewstatus {
326: my $docdir=$perlvar{'lonDocRoot'};
327: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
328: my $now=time;
329: my $local=localtime($now);
330: print $fh "LOND status $local - parent $$\n\n";
331: opendir(DIR,"$docdir/lon-status/londchld");
332: while ($filename=readdir(DIR)) {
333: unlink("$docdir/lon-status/londchld/$filename");
334: }
335: closedir(DIR);
336: }
337:
338: # -------------------------------------------------------------- Status setting
339:
340: sub status {
341: my $what=shift;
342: my $now=time;
343: my $local=localtime($now);
344: $status=$local.': '.$what;
345: $0='lond: '.$what.' '.$local;
346: }
347:
348: # -------------------------------------------------------- Escape Special Chars
349:
350: sub escape {
351: my $str=shift;
352: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
353: return $str;
354: }
355:
356: # ----------------------------------------------------- Un-Escape Special Chars
357:
358: sub unescape {
359: my $str=shift;
360: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
361: return $str;
362: }
363:
364: # ----------------------------------------------------------- Send USR1 to lonc
365:
366: sub reconlonc {
367: my $peerfile=shift;
368: &logthis("Trying to reconnect for $peerfile");
369: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
370: if (my $fh=IO::File->new("$loncfile")) {
371: my $loncpid=<$fh>;
372: chomp($loncpid);
373: if (kill 0 => $loncpid) {
374: &logthis("lonc at pid $loncpid responding, sending USR1");
375: kill USR1 => $loncpid;
376: sleep 5;
377: if (-e "$peerfile") { return; }
378: &logthis("$peerfile still not there, give it another try");
379: sleep 10;
380: if (-e "$peerfile") { return; }
381: &logthis(
382: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
383: } else {
384: &logthis(
385: "<font color=red>CRITICAL: "
386: ."lonc at pid $loncpid not responding, giving up</font>");
387: }
388: } else {
389: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
390: }
391: }
392:
393: # -------------------------------------------------- Non-critical communication
394:
395: sub subreply {
396: my ($cmd,$server)=@_;
397: my $peerfile="$perlvar{'lonSockDir'}/$server";
398: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
399: Type => SOCK_STREAM,
400: Timeout => 10)
401: or return "con_lost";
402: print $sclient "$cmd\n";
403: my $answer=<$sclient>;
404: chomp($answer);
405: if (!$answer) { $answer="con_lost"; }
406: return $answer;
407: }
408:
409: sub reply {
410: my ($cmd,$server)=@_;
411: my $answer;
412: if ($server ne $currenthostid) {
413: $answer=subreply($cmd,$server);
414: if ($answer eq 'con_lost') {
415: $answer=subreply("ping",$server);
416: if ($answer ne $server) {
417: &logthis("sub reply: answer != server answer is $answer, server is $server");
418: &reconlonc("$perlvar{'lonSockDir'}/$server");
419: }
420: $answer=subreply($cmd,$server);
421: }
422: } else {
423: $answer='self_reply';
424: }
425: return $answer;
426: }
427:
428: # -------------------------------------------------------------- Talk to lonsql
429:
430: sub sqlreply {
431: my ($cmd)=@_;
432: my $answer=subsqlreply($cmd);
433: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
434: return $answer;
435: }
436:
437: sub subsqlreply {
438: my ($cmd)=@_;
439: my $unixsock="mysqlsock";
440: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
441: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
442: Type => SOCK_STREAM,
443: Timeout => 10)
444: or return "con_lost";
445: print $sclient "$cmd\n";
446: my $answer=<$sclient>;
447: chomp($answer);
448: if (!$answer) { $answer="con_lost"; }
449: return $answer;
450: }
451:
452: # -------------------------------------------- Return path to profile directory
453:
454: sub propath {
455: my ($udom,$uname)=@_;
456: $udom=~s/\W//g;
457: $uname=~s/\W//g;
458: my $subdir=$uname.'__';
459: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
460: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
461: return $proname;
462: }
463:
464: # --------------------------------------- Is this the home server of an author?
465:
466: sub ishome {
467: my $author=shift;
468: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
469: my ($udom,$uname)=split(/\//,$author);
470: my $proname=propath($udom,$uname);
471: if (-e $proname) {
472: return 'owner';
473: } else {
474: return 'not_owner';
475: }
476: }
477:
478: # ======================================================= Continue main program
479: # ---------------------------------------------------- Fork once and dissociate
480:
481: $fpid=fork;
482: exit if $fpid;
483: die "Couldn't fork: $!" unless defined ($fpid);
484:
485: POSIX::setsid() or die "Can't start new session: $!";
486:
487: # ------------------------------------------------------- Write our PID on disk
488:
489: $execdir=$perlvar{'lonDaemons'};
490: open (PIDSAVE,">$execdir/logs/lond.pid");
491: print PIDSAVE "$$\n";
492: close(PIDSAVE);
493: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
494: &status('Starting');
495:
496:
497:
498: # ----------------------------------------------------- Install signal handlers
499:
500:
501: $SIG{CHLD} = \&REAPER;
502: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
503: $SIG{HUP} = \&HUPSMAN;
504: $SIG{USR1} = \&checkchildren;
505:
506:
507:
508: # --------------------------------------------------------------
509: # Accept connections. When a connection comes in, it is validated
510: # and if good, a child process is created to process transactions
511: # along the connection.
512:
513: while (1) {
514: $client = $server->accept() or next;
515: make_new_child($client);
516: }
517:
518: sub init_host_and_domain {
519: my ($remotereq) = @_;
520: my (undef,$hostid)=split(/:/,$remotereq);
521: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
522: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
523: $currenthostid=$hostid;
524: $currentdomainid=$hostdom{$hostid};
525: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
526: } else {
527: &logthis("Requested host id $hostid not an alias of ".
528: $perlvar{'lonHostID'}." refusing connection");
529: return 0;
530: }
531: return 1;
532: }
533:
534: sub make_new_child {
535: my $client;
536: my $pid;
537: my $cipher;
538: my $sigset;
539:
540: $client = shift;
541: &logthis("Attempting to start child");
542: # block signal for fork
543: $sigset = POSIX::SigSet->new(SIGINT);
544: sigprocmask(SIG_BLOCK, $sigset)
545: or die "Can't block SIGINT for fork: $!\n";
546:
547: die "fork: $!" unless defined ($pid = fork);
548:
549: if ($pid) {
550: # Parent records the child's birth and returns.
551: sigprocmask(SIG_UNBLOCK, $sigset)
552: or die "Can't unblock SIGINT for fork: $!\n";
553: $children{$pid} = 1;
554: $children++;
555: &status('Started child '.$pid);
556: return;
557: } else {
558: # Child can *not* return from this subroutine.
559: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
560: $SIG{USR1}= \&logstatus;
561: $SIG{ALRM}= \&timeout;
562: $lastlog='Forked ';
563: $status='Forked';
564:
565: # unblock signals
566: sigprocmask(SIG_UNBLOCK, $sigset)
567: or die "Can't unblock SIGINT for fork: $!\n";
568:
569: $tmpsnum=0;
570: #---------------------------------------------------- kerberos 5 initialization
571: &Authen::Krb5::init_context();
572: &Authen::Krb5::init_ets();
573:
574: &status('Accepted connection');
575: # =============================================================================
576: # do something with the connection
577: # -----------------------------------------------------------------------------
578: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
579: # connection liveness.
580: # see if we know client and check for spoof IP by challenge
581: my $caller = getpeername($client);
582: my ($port,$iaddr)=unpack_sockaddr_in($caller);
583: my $clientip=inet_ntoa($iaddr);
584: my $clientrec=($hostid{$clientip} ne undef);
585: &logthis(
586: "<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
587: );
588: &status("Connecting $clientip ($hostid{$clientip})");
589: my $clientok;
590: if ($clientrec) {
591: &status("Waiting for init from $clientip ($hostid{$clientip})");
592: my $remotereq=<$client>;
593: $remotereq=~s/[^\w:]//g;
594: if ($remotereq =~ /^init/) {
595: if (!&init_host_and_domain($remotereq)) {
596: &status("Got bad init message, exiting");
597: print $client "refused\n";
598: $client->close();
599: &logthis("<font color=blue>WARNING: "
600: ."Bad init message $remotereq, closing connection</font>");
601: exit;
602: }
603: my $challenge="$$".time;
604: print $client "$challenge\n";
605: &status(
606: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
607: $remotereq=<$client>;
608: $remotereq=~s/\W//g;
609: if ($challenge eq $remotereq) {
610: $clientok=1;
611: print $client "ok\n";
612: } else {
613: &logthis(
614: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
615: &status('No challenge reply '.$clientip);
616: }
617: } else {
618: &logthis(
619: "<font color=blue>WARNING: "
620: ."$clientip failed to initialize: >$remotereq< </font>");
621: &status('No init '.$clientip);
622: }
623: } else {
624: &logthis(
625: "<font color=blue>WARNING: Unknown client $clientip</font>");
626: &status('Hung up on '.$clientip);
627: }
628: if ($clientok) {
629: # ---------------- New known client connecting, could mean machine online again
630:
631: foreach my $id (keys(%hostip)) {
632: if ($hostip{$id} ne $clientip ||
633: $hostip{$currenthostid} eq $clientip) {
634: # no need to try to do recon's to myself
635: next;
636: }
637: &reconlonc("$perlvar{'lonSockDir'}/$id");
638: }
639: &logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
640: &status('Will listen to '.$hostid{$clientip});
641: # ------------------------------------------------------------ Process requests
642: while (my $userinput=<$client>) {
643: chomp($userinput);
644: Debug("Request = $userinput\n");
645: &status('Processing '.$hostid{$clientip}.': '.$userinput);
646: my $wasenc=0;
647: alarm(120);
648: # ------------------------------------------------------------ See if encrypted
649: if ($userinput =~ /^enc/) {
650: if ($cipher) {
651: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
652: $userinput='';
653: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
654: $userinput.=
655: $cipher->decrypt(
656: pack("H16",substr($encinput,$encidx,16))
657: );
658: }
659: $userinput=substr($userinput,0,$cmdlength);
660: $wasenc=1;
661: }
662: }
663:
664: # ------------------------------------------------------------- Normal commands
665: # ------------------------------------------------------------------------ ping
666: if ($userinput =~ /^ping/) {
667: print $client "$currenthostid\n";
668: # ------------------------------------------------------------------------ pong
669: } elsif ($userinput =~ /^pong/) {
670: $reply=reply("ping",$hostid{$clientip});
671: print $client "$currenthostid:$reply\n";
672: # ------------------------------------------------------------------------ ekey
673: } elsif ($userinput =~ /^ekey/) {
674: my $buildkey=time.$$.int(rand 100000);
675: $buildkey=~tr/1-6/A-F/;
676: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
677: my $key=$currenthostid.$hostid{$clientip};
678: $key=~tr/a-z/A-Z/;
679: $key=~tr/G-P/0-9/;
680: $key=~tr/Q-Z/0-9/;
681: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
682: $key=substr($key,0,32);
683: my $cipherkey=pack("H32",$key);
684: $cipher=new IDEA $cipherkey;
685: print $client "$buildkey\n";
686: # ------------------------------------------------------------------------ load
687: } elsif ($userinput =~ /^load/) {
688: my $loadavg;
689: {
690: my $loadfile=IO::File->new('/proc/loadavg');
691: $loadavg=<$loadfile>;
692: }
693: $loadavg =~ s/\s.*//g;
694: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
695: print $client "$loadpercent\n";
696: # ----------------------------------------------------------------- currentauth
697: } elsif ($userinput =~ /^currentauth/) {
698: if ($wasenc==1) {
699: my ($cmd,$udom,$uname)=split(/:/,$userinput);
700: my $result = GetAuthType($udom, $uname);
701: if($result eq "nouser") {
702: print $client "unknown_user\n";
703: }
704: else {
705: print $client "$result\n"
706: }
707: } else {
708: print $client "refused\n";
709: }
710: # ------------------------------------------------------------------------ auth
711: } elsif ($userinput =~ /^auth/) {
712: if ($wasenc==1) {
713: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
714: chomp($upass);
715: $upass=unescape($upass);
716: my $proname=propath($udom,$uname);
717: my $passfilename="$proname/passwd";
718: if (-e $passfilename) {
719: my $pf = IO::File->new($passfilename);
720: my $realpasswd=<$pf>;
721: chomp($realpasswd);
722: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
723: my $pwdcorrect=0;
724: if ($howpwd eq 'internal') {
725: &Debug("Internal auth");
726: $pwdcorrect=
727: (crypt($upass,$contentpwd) eq $contentpwd);
728: } elsif ($howpwd eq 'unix') {
729: &Debug("Unix auth");
730: if((getpwnam($uname))[1] eq "") { #no such user!
731: $pwdcorrect = 0;
732: } else {
733: $contentpwd=(getpwnam($uname))[1];
734: my $pwauth_path="/usr/local/sbin/pwauth";
735: unless ($contentpwd eq 'x') {
736: $pwdcorrect=
737: (crypt($upass,$contentpwd) eq
738: $contentpwd);
739: }
740:
741: elsif (-e $pwauth_path) {
742: open PWAUTH, "|$pwauth_path" or
743: die "Cannot invoke authentication";
744: print PWAUTH "$uname\n$upass\n";
745: close PWAUTH;
746: $pwdcorrect=!$?;
747: }
748: }
749: } elsif ($howpwd eq 'krb4') {
750: $null=pack("C",0);
751: unless ($upass=~/$null/) {
752: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
753: ($uname,"",$contentpwd,'krbtgt',
754: $contentpwd,1,$upass);
755: if (!$krb4_error) {
756: $pwdcorrect = 1;
757: } else {
758: $pwdcorrect=0;
759: # log error if it is not a bad password
760: if ($krb4_error != 62) {
761: &logthis('krb4:'.$uname.','.$contentpwd.','.
762: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
763: }
764: }
765: }
766: } elsif ($howpwd eq 'krb5') {
767: $null=pack("C",0);
768: unless ($upass=~/$null/) {
769: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
770: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
771: my $krbserver=&Authen::Krb5::parse_name($krbservice);
772: my $credentials=&Authen::Krb5::cc_default();
773: $credentials->initialize($krbclient);
774: my $krbreturn =
775: &Authen::Krb5::get_in_tkt_with_password(
776: $krbclient,$krbserver,$upass,$credentials);
777: # unless ($krbreturn) {
778: # &logthis("Krb5 Error: ".
779: # &Authen::Krb5::error());
780: # }
781: $pwdcorrect = ($krbreturn == 1);
782: } else { $pwdcorrect=0; }
783: } elsif ($howpwd eq 'localauth') {
784: $pwdcorrect=&localauth::localauth($uname,$upass,
785: $contentpwd);
786: }
787: if ($pwdcorrect) {
788: print $client "authorized\n";
789: } else {
790: print $client "non_authorized\n";
791: }
792: } else {
793: print $client "unknown_user\n";
794: }
795: } else {
796: print $client "refused\n";
797: }
798: # ---------------------------------------------------------------------- passwd
799: } elsif ($userinput =~ /^passwd/) {
800: if ($wasenc==1) {
801: my
802: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
803: chomp($npass);
804: $upass=&unescape($upass);
805: $npass=&unescape($npass);
806: &Debug("Trying to change password for $uname");
807: my $proname=propath($udom,$uname);
808: my $passfilename="$proname/passwd";
809: if (-e $passfilename) {
810: my $realpasswd;
811: { my $pf = IO::File->new($passfilename);
812: $realpasswd=<$pf>; }
813: chomp($realpasswd);
814: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
815: if ($howpwd eq 'internal') {
816: &Debug("internal auth");
817: if (crypt($upass,$contentpwd) eq $contentpwd) {
818: my $salt=time;
819: $salt=substr($salt,6,2);
820: my $ncpass=crypt($npass,$salt);
821: { my $pf = IO::File->new(">$passfilename");
822: print $pf "internal:$ncpass\n"; }
823: &logthis("Result of password change for $uname: pwchange_success");
824: print $client "ok\n";
825: } else {
826: print $client "non_authorized\n";
827: }
828: } elsif ($howpwd eq 'unix') {
829: # Unix means we have to access /etc/password
830: # one way or another.
831: # First: Make sure the current password is
832: # correct
833: &Debug("auth is unix");
834: $contentpwd=(getpwnam($uname))[1];
835: my $pwdcorrect = "0";
836: my $pwauth_path="/usr/local/sbin/pwauth";
837: unless ($contentpwd eq 'x') {
838: $pwdcorrect=
839: (crypt($upass,$contentpwd) eq $contentpwd);
840: } elsif (-e $pwauth_path) {
841: open PWAUTH, "|$pwauth_path" or
842: die "Cannot invoke authentication";
843: print PWAUTH "$uname\n$upass\n";
844: close PWAUTH;
845: &Debug("exited pwauth with $? ($uname,$upass) ");
846: $pwdcorrect=($? == 0);
847: }
848: if ($pwdcorrect) {
849: my $execdir=$perlvar{'lonDaemons'};
850: &Debug("Opening lcpasswd pipeline");
851: my $pf = IO::File->new("|$execdir/lcpasswd > /home/www/lcpasswd.log");
852: print $pf "$uname\n$npass\n$npass\n";
853: close $pf;
854: my $err = $?;
855: my $result = ($err>0 ? 'pwchange_failure'
856: : 'ok');
857: &logthis("Result of password change for $uname: ".
858: &lcpasswdstrerror($?));
859: print $client "$result\n";
860: } else {
861: print $client "non_authorized\n";
862: }
863: } else {
864: print $client "auth_mode_error\n";
865: }
866: } else {
867: print $client "unknown_user\n";
868: }
869: } else {
870: print $client "refused\n";
871: }
872: # -------------------------------------------------------------------- makeuser
873: } elsif ($userinput =~ /^makeuser/) {
874: &Debug("Make user received");
875: my $oldumask=umask(0077);
876: if ($wasenc==1) {
877: my
878: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
879: &Debug("cmd =".$cmd." $udom =".$udom.
880: " uname=".$uname);
881: chomp($npass);
882: $npass=&unescape($npass);
883: my $proname=propath($udom,$uname);
884: my $passfilename="$proname/passwd";
885: &Debug("Password file created will be:".
886: $passfilename);
887: if (-e $passfilename) {
888: print $client "already_exists\n";
889: } elsif ($udom ne $currentdomainid) {
890: print $client "not_right_domain\n";
891: } else {
892: @fpparts=split(/\//,$proname);
893: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
894: $fperror='';
895: for ($i=3;$i<=$#fpparts;$i++) {
896: $fpnow.='/'.$fpparts[$i];
897: unless (-e $fpnow) {
898: unless (mkdir($fpnow,0777)) {
899: $fperror="error: ".($!+0)
900: ." mkdir failed while attempting "
901: ."makeuser\n";
902: }
903: }
904: }
905: unless ($fperror) {
906: my $result=&make_passwd_file($uname, $umode,$npass,
907: $passfilename);
908: print $client $result;
909: } else {
910: print $client "$fperror\n";
911: }
912: }
913: } else {
914: print $client "refused\n";
915: }
916: umask($oldumask);
917: # -------------------------------------------------------------- changeuserauth
918: } elsif ($userinput =~ /^changeuserauth/) {
919: &Debug("Changing authorization");
920: if ($wasenc==1) {
921: my
922: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
923: chomp($npass);
924: &Debug("cmd = ".$cmd." domain= ".$udom.
925: "uname =".$uname." umode= ".$umode);
926: $npass=&unescape($npass);
927: my $proname=&propath($udom,$uname);
928: my $passfilename="$proname/passwd";
929: if ($udom ne $currentdomainid) {
930: print $client "not_right_domain\n";
931: } else {
932: my $result=&make_passwd_file($uname, $umode,$npass,
933: $passfilename);
934: print $client $result;
935: }
936: } else {
937: print $client "refused\n";
938: }
939: # ------------------------------------------------------------------------ home
940: } elsif ($userinput =~ /^home/) {
941: my ($cmd,$udom,$uname)=split(/:/,$userinput);
942: chomp($uname);
943: my $proname=propath($udom,$uname);
944: if (-e $proname) {
945: print $client "found\n";
946: } else {
947: print $client "not_found\n";
948: }
949: # ---------------------------------------------------------------------- update
950: } elsif ($userinput =~ /^update/) {
951: my ($cmd,$fname)=split(/:/,$userinput);
952: my $ownership=ishome($fname);
953: if ($ownership eq 'not_owner') {
954: if (-e $fname) {
955: my ($dev,$ino,$mode,$nlink,
956: $uid,$gid,$rdev,$size,
957: $atime,$mtime,$ctime,
958: $blksize,$blocks)=stat($fname);
959: $now=time;
960: $since=$now-$atime;
961: if ($since>$perlvar{'lonExpire'}) {
962: $reply=
963: reply("unsub:$fname","$hostid{$clientip}");
964: unlink("$fname");
965: } else {
966: my $transname="$fname.in.transfer";
967: my $remoteurl=
968: reply("sub:$fname","$hostid{$clientip}");
969: my $response;
970: {
971: my $ua=new LWP::UserAgent;
972: my $request=new HTTP::Request('GET',"$remoteurl");
973: $response=$ua->request($request,$transname);
974: }
975: if ($response->is_error()) {
976: unlink($transname);
977: my $message=$response->status_line;
978: &logthis(
979: "LWP GET: $message for $fname ($remoteurl)");
980: } else {
981: if ($remoteurl!~/\.meta$/) {
982: my $ua=new LWP::UserAgent;
983: my $mrequest=
984: new HTTP::Request('GET',$remoteurl.'.meta');
985: my $mresponse=
986: $ua->request($mrequest,$fname.'.meta');
987: if ($mresponse->is_error()) {
988: unlink($fname.'.meta');
989: }
990: }
991: rename($transname,$fname);
992: }
993: }
994: print $client "ok\n";
995: } else {
996: print $client "not_found\n";
997: }
998: } else {
999: print $client "rejected\n";
1000: }
1001: # -------------------------------------- fetch a user file from a remote server
1002: } elsif ($userinput =~ /^fetchuserfile/) {
1003: my ($cmd,$fname)=split(/:/,$userinput);
1004: my ($udom,$uname,$ufile)=split(/\//,$fname);
1005: my $udir=propath($udom,$uname).'/userfiles';
1006: unless (-e $udir) { mkdir($udir,0770); }
1007: if (-e $udir) {
1008: $ufile=~s/^[\.\~]+//;
1009: $ufile=~s/\///g;
1010: my $transname=$udir.'/'.$ufile;
1011: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
1012: my $response;
1013: {
1014: my $ua=new LWP::UserAgent;
1015: my $request=new HTTP::Request('GET',"$remoteurl");
1016: $response=$ua->request($request,$transname);
1017: }
1018: if ($response->is_error()) {
1019: unlink($transname);
1020: my $message=$response->status_line;
1021: &logthis(
1022: "LWP GET: $message for $fname ($remoteurl)");
1023: print $client "failed\n";
1024: } else {
1025: print $client "ok\n";
1026: }
1027: } else {
1028: print $client "not_home\n";
1029: }
1030: # ------------------------------------------ authenticate access to a user file
1031: } elsif ($userinput =~ /^tokenauthuserfile/) {
1032: my ($cmd,$fname,$session)=split(/:/,$userinput);
1033: chomp($session);
1034: $reply='non_auth';
1035: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1036: $session.'.id')) {
1037: while ($line=<ENVIN>) {
1038: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1039: }
1040: close(ENVIN);
1041: print $client $reply."\n";
1042: } else {
1043: print $client "invalid_token\n";
1044: }
1045: # ----------------------------------------------------------------- unsubscribe
1046: } elsif ($userinput =~ /^unsub/) {
1047: my ($cmd,$fname)=split(/:/,$userinput);
1048: if (-e $fname) {
1049: print $client &unsub($client,$fname,$clientip);
1050: } else {
1051: print $client "not_found\n";
1052: }
1053: # ------------------------------------------------------------------- subscribe
1054: } elsif ($userinput =~ /^sub/) {
1055: print $client &subscribe($userinput,$clientip);
1056: # ------------------------------------------------------------- current version
1057: } elsif ($userinput =~ /^currentversion/) {
1058: my ($cmd,$fname)=split(/:/,$userinput);
1059: print $client ¤tversion($fname)."\n";
1060: # ------------------------------------------------------------------------- log
1061: } elsif ($userinput =~ /^log/) {
1062: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1063: chomp($what);
1064: my $proname=propath($udom,$uname);
1065: my $now=time;
1066: {
1067: my $hfh;
1068: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1069: print $hfh "$now:$hostid{$clientip}:$what\n";
1070: print $client "ok\n";
1071: } else {
1072: print $client "error: ".($!+0)
1073: ." IO::File->new Failed "
1074: ."while attempting log\n";
1075: }
1076: }
1077: # ------------------------------------------------------------------------- put
1078: } elsif ($userinput =~ /^put/) {
1079: my ($cmd,$udom,$uname,$namespace,$what)
1080: =split(/:/,$userinput);
1081: $namespace=~s/\//\_/g;
1082: $namespace=~s/\W//g;
1083: if ($namespace ne 'roles') {
1084: chomp($what);
1085: my $proname=propath($udom,$uname);
1086: my $now=time;
1087: unless ($namespace=~/^nohist\_/) {
1088: my $hfh;
1089: if (
1090: $hfh=IO::File->new(">>$proname/$namespace.hist")
1091: ) { print $hfh "P:$now:$what\n"; }
1092: }
1093: my @pairs=split(/\&/,$what);
1094: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1095: foreach $pair (@pairs) {
1096: ($key,$value)=split(/=/,$pair);
1097: $hash{$key}=$value;
1098: }
1099: if (untie(%hash)) {
1100: print $client "ok\n";
1101: } else {
1102: print $client "error: ".($!+0)
1103: ." untie(GDBM) failed ".
1104: "while attempting put\n";
1105: }
1106: } else {
1107: print $client "error: ".($!)
1108: ." tie(GDBM) Failed ".
1109: "while attempting put\n";
1110: }
1111: } else {
1112: print $client "refused\n";
1113: }
1114: # -------------------------------------------------------------------- rolesput
1115: } elsif ($userinput =~ /^rolesput/) {
1116: &Debug("rolesput");
1117: if ($wasenc==1) {
1118: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1119: =split(/:/,$userinput);
1120: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1121: "user = ".$exeuser." udom=".$udom.
1122: "what = ".$what);
1123: my $namespace='roles';
1124: chomp($what);
1125: my $proname=propath($udom,$uname);
1126: my $now=time;
1127: {
1128: my $hfh;
1129: if (
1130: $hfh=IO::File->new(">>$proname/$namespace.hist")
1131: ) {
1132: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1133: }
1134: }
1135: my @pairs=split(/\&/,$what);
1136: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1137: foreach $pair (@pairs) {
1138: ($key,$value)=split(/=/,$pair);
1139: &ManagePermissions($key, $udom, $uname,
1140: &GetAuthType( $udom,
1141: $uname));
1142: $hash{$key}=$value;
1143:
1144: }
1145: if (untie(%hash)) {
1146: print $client "ok\n";
1147: } else {
1148: print $client "error: ".($!+0)
1149: ." untie(GDBM) Failed ".
1150: "while attempting rolesput\n";
1151: }
1152: } else {
1153: print $client "error: ".($!+0)
1154: ." tie(GDBM) Failed ".
1155: "while attempting rolesput\n";
1156: }
1157: } else {
1158: print $client "refused\n";
1159: }
1160: # ------------------------------------------------------------------------- get
1161: } elsif ($userinput =~ /^get/) {
1162: my ($cmd,$udom,$uname,$namespace,$what)
1163: =split(/:/,$userinput);
1164: $namespace=~s/\//\_/g;
1165: $namespace=~s/\W//g;
1166: chomp($what);
1167: my @queries=split(/\&/,$what);
1168: my $proname=propath($udom,$uname);
1169: my $qresult='';
1170: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1171: for ($i=0;$i<=$#queries;$i++) {
1172: $qresult.="$hash{$queries[$i]}&";
1173: }
1174: if (untie(%hash)) {
1175: $qresult=~s/\&$//;
1176: print $client "$qresult\n";
1177: } else {
1178: print $client "error: ".($!+0)
1179: ." untie(GDBM) Failed ".
1180: "while attempting get\n";
1181: }
1182: } else {
1183: if ($!+0 == 2) {
1184: print $client "error:No such file or ".
1185: "GDBM reported bad block error\n";
1186: } else {
1187: print $client "error: ".($!+0)
1188: ." tie(GDBM) Failed ".
1189: "while attempting get\n";
1190: }
1191: }
1192: # ------------------------------------------------------------------------ eget
1193: } elsif ($userinput =~ /^eget/) {
1194: my ($cmd,$udom,$uname,$namespace,$what)
1195: =split(/:/,$userinput);
1196: $namespace=~s/\//\_/g;
1197: $namespace=~s/\W//g;
1198: chomp($what);
1199: my @queries=split(/\&/,$what);
1200: my $proname=propath($udom,$uname);
1201: my $qresult='';
1202: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1203: for ($i=0;$i<=$#queries;$i++) {
1204: $qresult.="$hash{$queries[$i]}&";
1205: }
1206: if (untie(%hash)) {
1207: $qresult=~s/\&$//;
1208: if ($cipher) {
1209: my $cmdlength=length($qresult);
1210: $qresult.=" ";
1211: my $encqresult='';
1212: for
1213: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1214: $encqresult.=
1215: unpack("H16",
1216: $cipher->encrypt(substr($qresult,$encidx,8)));
1217: }
1218: print $client "enc:$cmdlength:$encqresult\n";
1219: } else {
1220: print $client "error:no_key\n";
1221: }
1222: } else {
1223: print $client "error: ".($!+0)
1224: ." untie(GDBM) Failed ".
1225: "while attempting eget\n";
1226: }
1227: } else {
1228: print $client "error: ".($!+0)
1229: ." tie(GDBM) Failed ".
1230: "while attempting eget\n";
1231: }
1232: # ------------------------------------------------------------------------- del
1233: } elsif ($userinput =~ /^del/) {
1234: my ($cmd,$udom,$uname,$namespace,$what)
1235: =split(/:/,$userinput);
1236: $namespace=~s/\//\_/g;
1237: $namespace=~s/\W//g;
1238: chomp($what);
1239: my $proname=propath($udom,$uname);
1240: my $now=time;
1241: unless ($namespace=~/^nohist\_/) {
1242: my $hfh;
1243: if (
1244: $hfh=IO::File->new(">>$proname/$namespace.hist")
1245: ) { print $hfh "D:$now:$what\n"; }
1246: }
1247: my @keys=split(/\&/,$what);
1248: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1249: foreach $key (@keys) {
1250: delete($hash{$key});
1251: }
1252: if (untie(%hash)) {
1253: print $client "ok\n";
1254: } else {
1255: print $client "error: ".($!+0)
1256: ." untie(GDBM) Failed ".
1257: "while attempting del\n";
1258: }
1259: } else {
1260: print $client "error: ".($!+0)
1261: ." tie(GDBM) Failed ".
1262: "while attempting del\n";
1263: }
1264: # ------------------------------------------------------------------------ keys
1265: } elsif ($userinput =~ /^keys/) {
1266: my ($cmd,$udom,$uname,$namespace)
1267: =split(/:/,$userinput);
1268: $namespace=~s/\//\_/g;
1269: $namespace=~s/\W//g;
1270: my $proname=propath($udom,$uname);
1271: my $qresult='';
1272: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1273: foreach $key (keys %hash) {
1274: $qresult.="$key&";
1275: }
1276: if (untie(%hash)) {
1277: $qresult=~s/\&$//;
1278: print $client "$qresult\n";
1279: } else {
1280: print $client "error: ".($!+0)
1281: ." untie(GDBM) Failed ".
1282: "while attempting keys\n";
1283: }
1284: } else {
1285: print $client "error: ".($!+0)
1286: ." tie(GDBM) Failed ".
1287: "while attempting keys\n";
1288: }
1289: # ----------------------------------------------------------------- dumpcurrent
1290: } elsif ($userinput =~ /^currentdump/) {
1291: my ($cmd,$udom,$uname,$namespace)
1292: =split(/:/,$userinput);
1293: $namespace=~s/\//\_/g;
1294: $namespace=~s/\W//g;
1295: my $qresult='';
1296: my $proname=propath($udom,$uname);
1297: if (tie(%hash,'GDBM_File',
1298: "$proname/$namespace.db",
1299: &GDBM_READER(),0640)) {
1300: # Structure of %data:
1301: # $data{$symb}->{$parameter}=$value;
1302: # $data{$symb}->{'v.'.$parameter}=$version;
1303: # since $parameter will be unescaped, we do not
1304: # have to worry about silly parameter names...
1305: my %data = ();
1306: while (my ($key,$value) = each(%hash)) {
1307: my ($v,$symb,$param) = split(/:/,$key);
1308: next if ($v eq 'version' || $symb eq 'keys');
1309: next if (exists($data{$symb}) &&
1310: exists($data{$symb}->{$param}) &&
1311: $data{$symb}->{'v.'.$param} > $v);
1312: $data{$symb}->{$param}=$value;
1313: $data{$symb}->{'v.'.$param}=$v;
1314: }
1315: if (untie(%hash)) {
1316: while (my ($symb,$param_hash) = each(%data)) {
1317: while(my ($param,$value) = each (%$param_hash)){
1318: next if ($param =~ /^v\./);
1319: $qresult.=$symb.':'.$param.'='.$value.'&';
1320: }
1321: }
1322: chop($qresult);
1323: print $client "$qresult\n";
1324: } else {
1325: print $client "error: ".($!+0)
1326: ." untie(GDBM) Failed ".
1327: "while attempting currentdump\n";
1328: }
1329: } else {
1330: print $client "error: ".($!+0)
1331: ." tie(GDBM) Failed ".
1332: "while attempting currentdump\n";
1333: }
1334: # ------------------------------------------------------------------------ dump
1335: } elsif ($userinput =~ /^dump/) {
1336: my ($cmd,$udom,$uname,$namespace,$regexp)
1337: =split(/:/,$userinput);
1338: $namespace=~s/\//\_/g;
1339: $namespace=~s/\W//g;
1340: if (defined($regexp)) {
1341: $regexp=&unescape($regexp);
1342: } else {
1343: $regexp='.';
1344: }
1345: my $qresult='';
1346: my $proname=propath($udom,$uname);
1347: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1348: study($regexp);
1349: while (($key,$value) = each(%hash)) {
1350: if ($regexp eq '.') {
1351: $qresult.=$key.'='.$value.'&';
1352: } else {
1353: my $unescapeKey = &unescape($key);
1354: if (eval('$unescapeKey=~/$regexp/')) {
1355: $qresult.="$key=$value&";
1356: }
1357: }
1358: }
1359: if (untie(%hash)) {
1360: chop($qresult);
1361: print $client "$qresult\n";
1362: } else {
1363: print $client "error: ".($!+0)
1364: ." untie(GDBM) Failed ".
1365: "while attempting dump\n";
1366: }
1367: } else {
1368: print $client "error: ".($!+0)
1369: ." tie(GDBM) Failed ".
1370: "while attempting dump\n";
1371: }
1372: # ----------------------------------------------------------------------- store
1373: } elsif ($userinput =~ /^store/) {
1374: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1375: =split(/:/,$userinput);
1376: $namespace=~s/\//\_/g;
1377: $namespace=~s/\W//g;
1378: if ($namespace ne 'roles') {
1379: chomp($what);
1380: my $proname=propath($udom,$uname);
1381: my $now=time;
1382: unless ($namespace=~/^nohist\_/) {
1383: my $hfh;
1384: if (
1385: $hfh=IO::File->new(">>$proname/$namespace.hist")
1386: ) { print $hfh "P:$now:$rid:$what\n"; }
1387: }
1388: my @pairs=split(/\&/,$what);
1389:
1390: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1391: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1392: my $key;
1393: $hash{"version:$rid"}++;
1394: my $version=$hash{"version:$rid"};
1395: my $allkeys='';
1396: foreach $pair (@pairs) {
1397: ($key,$value)=split(/=/,$pair);
1398: $allkeys.=$key.':';
1399: $hash{"$version:$rid:$key"}=$value;
1400: }
1401: $hash{"$version:$rid:timestamp"}=$now;
1402: $allkeys.='timestamp';
1403: $hash{"$version:keys:$rid"}=$allkeys;
1404: if (untie(%hash)) {
1405: print $client "ok\n";
1406: } else {
1407: print $client "error: ".($!+0)
1408: ." untie(GDBM) Failed ".
1409: "while attempting store\n";
1410: }
1411: } else {
1412: print $client "error: ".($!+0)
1413: ." tie(GDBM) Failed ".
1414: "while attempting store\n";
1415: }
1416: } else {
1417: print $client "refused\n";
1418: }
1419: # --------------------------------------------------------------------- restore
1420: } elsif ($userinput =~ /^restore/) {
1421: my ($cmd,$udom,$uname,$namespace,$rid)
1422: =split(/:/,$userinput);
1423: $namespace=~s/\//\_/g;
1424: $namespace=~s/\W//g;
1425: chomp($rid);
1426: my $proname=propath($udom,$uname);
1427: my $qresult='';
1428: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1429: my $version=$hash{"version:$rid"};
1430: $qresult.="version=$version&";
1431: my $scope;
1432: for ($scope=1;$scope<=$version;$scope++) {
1433: my $vkeys=$hash{"$scope:keys:$rid"};
1434: my @keys=split(/:/,$vkeys);
1435: my $key;
1436: $qresult.="$scope:keys=$vkeys&";
1437: foreach $key (@keys) {
1438: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1439: }
1440: }
1441: if (untie(%hash)) {
1442: $qresult=~s/\&$//;
1443: print $client "$qresult\n";
1444: } else {
1445: print $client "error: ".($!+0)
1446: ." untie(GDBM) Failed ".
1447: "while attempting restore\n";
1448: }
1449: } else {
1450: print $client "error: ".($!+0)
1451: ." tie(GDBM) Failed ".
1452: "while attempting restore\n";
1453: }
1454: # -------------------------------------------------------------------- chatsend
1455: } elsif ($userinput =~ /^chatsend/) {
1456: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1457: &chatadd($cdom,$cnum,$newpost);
1458: print $client "ok\n";
1459: # -------------------------------------------------------------------- chatretr
1460: } elsif ($userinput =~ /^chatretr/) {
1461: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1462: my $reply='';
1463: foreach (&getchat($cdom,$cnum)) {
1464: $reply.=&escape($_).':';
1465: }
1466: $reply=~s/\:$//;
1467: print $client $reply."\n";
1468: # ------------------------------------------------------------------- querysend
1469: } elsif ($userinput =~ /^querysend/) {
1470: my ($cmd,$query,
1471: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1472: $query=~s/\n*$//g;
1473: print $client "".
1474: sqlreply("$hostid{$clientip}\&$query".
1475: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1476: # ------------------------------------------------------------------ queryreply
1477: } elsif ($userinput =~ /^queryreply/) {
1478: my ($cmd,$id,$reply)=split(/:/,$userinput);
1479: my $store;
1480: my $execdir=$perlvar{'lonDaemons'};
1481: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1482: $reply=~s/\&/\n/g;
1483: print $store $reply;
1484: close $store;
1485: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1486: print $store2 "done\n";
1487: close $store2;
1488: print $client "ok\n";
1489: }
1490: else {
1491: print $client "error: ".($!+0)
1492: ." IO::File->new Failed ".
1493: "while attempting queryreply\n";
1494: }
1495: # ----------------------------------------------------------------------- idput
1496: } elsif ($userinput =~ /^idput/) {
1497: my ($cmd,$udom,$what)=split(/:/,$userinput);
1498: chomp($what);
1499: $udom=~s/\W//g;
1500: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1501: my $now=time;
1502: {
1503: my $hfh;
1504: if (
1505: $hfh=IO::File->new(">>$proname.hist")
1506: ) { print $hfh "P:$now:$what\n"; }
1507: }
1508: my @pairs=split(/\&/,$what);
1509: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1510: foreach $pair (@pairs) {
1511: ($key,$value)=split(/=/,$pair);
1512: $hash{$key}=$value;
1513: }
1514: if (untie(%hash)) {
1515: print $client "ok\n";
1516: } else {
1517: print $client "error: ".($!+0)
1518: ." untie(GDBM) Failed ".
1519: "while attempting idput\n";
1520: }
1521: } else {
1522: print $client "error: ".($!+0)
1523: ." tie(GDBM) Failed ".
1524: "while attempting idput\n";
1525: }
1526: # ----------------------------------------------------------------------- idget
1527: } elsif ($userinput =~ /^idget/) {
1528: my ($cmd,$udom,$what)=split(/:/,$userinput);
1529: chomp($what);
1530: $udom=~s/\W//g;
1531: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1532: my @queries=split(/\&/,$what);
1533: my $qresult='';
1534: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1535: for ($i=0;$i<=$#queries;$i++) {
1536: $qresult.="$hash{$queries[$i]}&";
1537: }
1538: if (untie(%hash)) {
1539: $qresult=~s/\&$//;
1540: print $client "$qresult\n";
1541: } else {
1542: print $client "error: ".($!+0)
1543: ." untie(GDBM) Failed ".
1544: "while attempting idget\n";
1545: }
1546: } else {
1547: print $client "error: ".($!+0)
1548: ." tie(GDBM) Failed ".
1549: "while attempting idget\n";
1550: }
1551: # ---------------------------------------------------------------------- tmpput
1552: } elsif ($userinput =~ /^tmpput/) {
1553: my ($cmd,$what)=split(/:/,$userinput);
1554: my $store;
1555: $tmpsnum++;
1556: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1557: $id=~s/\W/\_/g;
1558: $what=~s/\n//g;
1559: my $execdir=$perlvar{'lonDaemons'};
1560: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1561: print $store $what;
1562: close $store;
1563: print $client "$id\n";
1564: }
1565: else {
1566: print $client "error: ".($!+0)
1567: ."IO::File->new Failed ".
1568: "while attempting tmpput\n";
1569: }
1570:
1571: # ---------------------------------------------------------------------- tmpget
1572: } elsif ($userinput =~ /^tmpget/) {
1573: my ($cmd,$id)=split(/:/,$userinput);
1574: chomp($id);
1575: $id=~s/\W/\_/g;
1576: my $store;
1577: my $execdir=$perlvar{'lonDaemons'};
1578: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1579: my $reply=<$store>;
1580: print $client "$reply\n";
1581: close $store;
1582: }
1583: else {
1584: print $client "error: ".($!+0)
1585: ."IO::File->new Failed ".
1586: "while attempting tmpget\n";
1587: }
1588:
1589: # ---------------------------------------------------------------------- tmpdel
1590: } elsif ($userinput =~ /^tmpdel/) {
1591: my ($cmd,$id)=split(/:/,$userinput);
1592: chomp($id);
1593: $id=~s/\W/\_/g;
1594: my $execdir=$perlvar{'lonDaemons'};
1595: if (unlink("$execdir/tmp/$id.tmp")) {
1596: print $client "ok\n";
1597: } else {
1598: print $client "error: ".($!+0)
1599: ."Unlink tmp Failed ".
1600: "while attempting tmpdel\n";
1601: }
1602: # -------------------------------------------------------------------------- ls
1603: } elsif ($userinput =~ /^ls/) {
1604: my ($cmd,$ulsdir)=split(/:/,$userinput);
1605: my $ulsout='';
1606: my $ulsfn;
1607: if (-e $ulsdir) {
1608: if(-d $ulsdir) {
1609: if (opendir(LSDIR,$ulsdir)) {
1610: while ($ulsfn=readdir(LSDIR)) {
1611: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1612: $ulsout.=$ulsfn.'&'.
1613: join('&',@ulsstats).':';
1614: }
1615: closedir(LSDIR);
1616: }
1617: } else {
1618: my @ulsstats=stat($ulsdir);
1619: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1620: }
1621: } else {
1622: $ulsout='no_such_dir';
1623: }
1624: if ($ulsout eq '') { $ulsout='empty'; }
1625: print $client "$ulsout\n";
1626: # ------------------------------------------------------------------ Hanging up
1627: } elsif (($userinput =~ /^exit/) ||
1628: ($userinput =~ /^init/)) {
1629: &logthis(
1630: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1631: print $client "bye\n";
1632: $client->close();
1633: last;
1634: # ------------------------------------------------------------- unknown command
1635: } else {
1636: # unknown command
1637: print $client "unknown_cmd\n";
1638: }
1639: # -------------------------------------------------------------------- complete
1640: alarm(0);
1641: &status('Listening to '.$hostid{$clientip});
1642: }
1643: # --------------------------------------------- client unknown or fishy, refuse
1644: } else {
1645: print $client "refused\n";
1646: $client->close();
1647: &logthis("<font color=blue>WARNING: "
1648: ."Rejected client $clientip, closing connection</font>");
1649: }
1650: }
1651:
1652: # =============================================================================
1653:
1654: &logthis("<font color=red>CRITICAL: "
1655: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1656:
1657:
1658: # this exit is VERY important, otherwise the child will become
1659: # a producer of more and more children, forking yourself into
1660: # process death.
1661: exit;
1662:
1663: }
1664:
1665:
1666: #
1667: # Checks to see if the input roleput request was to set
1668: # an author role. If so, invokes the lchtmldir script to set
1669: # up a correct public_html
1670: # Parameters:
1671: # request - The request sent to the rolesput subchunk.
1672: # We're looking for /domain/_au
1673: # domain - The domain in which the user is having roles doctored.
1674: # user - Name of the user for which the role is being put.
1675: # authtype - The authentication type associated with the user.
1676: #
1677: sub ManagePermissions
1678: {
1679: my $request = shift;
1680: my $domain = shift;
1681: my $user = shift;
1682: my $authtype= shift;
1683:
1684: # See if the request is of the form /$domain/_au
1685:
1686: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1687: my $execdir = $perlvar{'lonDaemons'};
1688: my $userhome= "/home/$user" ;
1689: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1690: system("$execdir/lchtmldir $userhome $user $authtype");
1691: }
1692: }
1693: #
1694: # GetAuthType - Determines the authorization type of a user in a domain.
1695:
1696: # Returns the authorization type or nouser if there is no such user.
1697: #
1698: sub GetAuthType
1699: {
1700: my $domain = shift;
1701: my $user = shift;
1702:
1703: Debug("GetAuthType( $domain, $user ) \n");
1704: my $proname = &propath($domain, $user);
1705: my $passwdfile = "$proname/passwd";
1706: if( -e $passwdfile ) {
1707: my $pf = IO::File->new($passwdfile);
1708: my $realpassword = <$pf>;
1709: chomp($realpassword);
1710: Debug("Password info = $realpassword\n");
1711: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1712: Debug("Authtype = $authtype, content = $contentpwd\n");
1713: my $availinfo = '';
1714: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1715: $availinfo = $contentpwd;
1716: }
1717:
1718: return "$authtype:$availinfo";
1719: }
1720: else {
1721: Debug("Returning nouser");
1722: return "nouser";
1723: }
1724: }
1725:
1726: sub addline {
1727: my ($fname,$hostid,$ip,$newline)=@_;
1728: my $contents;
1729: my $found=0;
1730: my $expr='^'.$hostid.':'.$ip.':';
1731: $expr =~ s/\./\\\./g;
1732: if ($sh=IO::File->new("$fname.subscription")) {
1733: while (my $subline=<$sh>) {
1734: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1735: }
1736: $sh->close();
1737: }
1738: $sh=IO::File->new(">$fname.subscription");
1739: if ($contents) { print $sh $contents; }
1740: if ($newline) { print $sh $newline; }
1741: $sh->close();
1742: return $found;
1743: }
1744:
1745: sub getchat {
1746: my ($cdom,$cname)=@_;
1747: my %hash;
1748: my $proname=&propath($cdom,$cname);
1749: my @entries=();
1750: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1751: &GDBM_READER(),0640)) {
1752: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1753: untie %hash;
1754: }
1755: return @entries;
1756: }
1757:
1758: sub chatadd {
1759: my ($cdom,$cname,$newchat)=@_;
1760: my %hash;
1761: my $proname=&propath($cdom,$cname);
1762: my @entries=();
1763: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1764: &GDBM_WRCREAT(),0640)) {
1765: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1766: my $time=time;
1767: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1768: my ($thentime,$idnum)=split(/\_/,$lastid);
1769: my $newid=$time.'_000000';
1770: if ($thentime==$time) {
1771: $idnum=~s/^0+//;
1772: $idnum++;
1773: $idnum=substr('000000'.$idnum,-6,6);
1774: $newid=$time.'_'.$idnum;
1775: }
1776: $hash{$newid}=$newchat;
1777: my $expired=$time-3600;
1778: foreach (keys %hash) {
1779: my ($thistime)=($_=~/(\d+)\_/);
1780: if ($thistime<$expired) {
1781: delete $hash{$_};
1782: }
1783: }
1784: untie %hash;
1785: }
1786: }
1787:
1788: sub unsub {
1789: my ($fname,$clientip)=@_;
1790: my $result;
1791: if (unlink("$fname.$hostid{$clientip}")) {
1792: $result="ok\n";
1793: } else {
1794: $result="not_subscribed\n";
1795: }
1796: if (-e "$fname.subscription") {
1797: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1798: if ($found) { $result="ok\n"; }
1799: } else {
1800: if ($result != "ok\n") { $result="not_subscribed\n"; }
1801: }
1802: return $result;
1803: }
1804:
1805: sub currentversion {
1806: my $fname=shift;
1807: my $version=-1;
1808: my $ulsdir='';
1809: if ($fname=~/^(.+)\/[^\/]+$/) {
1810: $ulsdir=$1;
1811: }
1812: my ($fnamere1,$fnamere2);
1813: # remove version if already specified
1814: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1815: # get the bits that go before and after the version number
1816: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
1817: $fnamere1=$1;
1818: $fnamere2='.'.$2;
1819: }
1820: if (-e $fname) { $version=1; }
1821: if (-e $ulsdir) {
1822: if(-d $ulsdir) {
1823: if (opendir(LSDIR,$ulsdir)) {
1824:
1825: while ($ulsfn=readdir(LSDIR)) {
1826: # see if this is a regular file (ignore links produced earlier)
1827: my $thisfile=$ulsdir.'/'.$ulsfn;
1828: unless (-l $thisfile) {
1829: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
1830: if ($1>$version) { $version=$1; }
1831: }
1832: }
1833: }
1834: closedir(LSDIR);
1835: $version++;
1836: }
1837: }
1838: }
1839: return $version;
1840: }
1841:
1842: sub thisversion {
1843: my $fname=shift;
1844: my $version=-1;
1845: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1846: $version=$1;
1847: }
1848: return $version;
1849: }
1850:
1851: sub subscribe {
1852: my ($userinput,$clientip)=@_;
1853: my $result;
1854: my ($cmd,$fname)=split(/:/,$userinput);
1855: my $ownership=&ishome($fname);
1856: if ($ownership eq 'owner') {
1857: # explitly asking for the current version?
1858: unless (-e $fname) {
1859: my $currentversion=¤tversion($fname);
1860: if (&thisversion($fname)==$currentversion) {
1861: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1862: my $root=$1;
1863: my $extension=$2;
1864: symlink($root.'.'.$extension,
1865: $root.'.'.$currentversion.'.'.$extension);
1866: unless ($extension=~/\.meta$/) {
1867: symlink($root.'.'.$extension.'.meta',
1868: $root.'.'.$currentversion.'.'.$extension.'.meta');
1869: }
1870: }
1871: }
1872: }
1873: if (-e $fname) {
1874: if (-d $fname) {
1875: $result="directory\n";
1876: } else {
1877: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1878: $now=time;
1879: my $found=&addline($fname,$hostid{$clientip},$clientip,
1880: "$hostid{$clientip}:$clientip:$now\n");
1881: if ($found) { $result="$fname\n"; }
1882: # if they were subscribed to only meta data, delete that
1883: # subscription, when you subscribe to a file you also get
1884: # the metadata
1885: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1886: $fname=~s/\/home\/httpd\/html\/res/raw/;
1887: $fname="http://$thisserver/".$fname;
1888: $result="$fname\n";
1889: }
1890: } else {
1891: $result="not_found\n";
1892: }
1893: } else {
1894: $result="rejected\n";
1895: }
1896: return $result;
1897: }
1898:
1899: sub make_passwd_file {
1900: my ($uname, $umode,$npass,$passfilename)=@_;
1901: my $result="ok\n";
1902: if ($umode eq 'krb4' or $umode eq 'krb5') {
1903: {
1904: my $pf = IO::File->new(">$passfilename");
1905: print $pf "$umode:$npass\n";
1906: }
1907: } elsif ($umode eq 'internal') {
1908: my $salt=time;
1909: $salt=substr($salt,6,2);
1910: my $ncpass=crypt($npass,$salt);
1911: {
1912: &Debug("Creating internal auth");
1913: my $pf = IO::File->new(">$passfilename");
1914: print $pf "internal:$ncpass\n";
1915: }
1916: } elsif ($umode eq 'localauth') {
1917: {
1918: my $pf = IO::File->new(">$passfilename");
1919: print $pf "localauth:$npass\n";
1920: }
1921: } elsif ($umode eq 'unix') {
1922: {
1923: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1924: {
1925: &Debug("Executing external: ".$execpath);
1926: &Debug("user = ".$uname.", Password =". $npass);
1927: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
1928: print $se "$uname\n";
1929: print $se "$npass\n";
1930: print $se "$npass\n";
1931: }
1932: my $useraddok = $?;
1933: if($useraddok > 0) {
1934: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1935: }
1936: my $pf = IO::File->new(">$passfilename");
1937: print $pf "unix:\n";
1938: }
1939: } elsif ($umode eq 'none') {
1940: {
1941: my $pf = IO::File->new(">$passfilename");
1942: print $pf "none:\n";
1943: }
1944: } else {
1945: $result="auth_mode_error\n";
1946: }
1947: return $result;
1948: }
1949:
1950: # ----------------------------------- POD (plain old documentation, CPAN style)
1951:
1952: =head1 NAME
1953:
1954: lond - "LON Daemon" Server (port "LOND" 5663)
1955:
1956: =head1 SYNOPSIS
1957:
1958: Usage: B<lond>
1959:
1960: Should only be run as user=www. This is a command-line script which
1961: is invoked by B<loncron>. There is no expectation that a typical user
1962: will manually start B<lond> from the command-line. (In other words,
1963: DO NOT START B<lond> YOURSELF.)
1964:
1965: =head1 DESCRIPTION
1966:
1967: There are two characteristics associated with the running of B<lond>,
1968: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1969: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1970: subscriptions, etc). These are described in two large
1971: sections below.
1972:
1973: B<PROCESS MANAGEMENT>
1974:
1975: Preforker - server who forks first. Runs as a daemon. HUPs.
1976: Uses IDEA encryption
1977:
1978: B<lond> forks off children processes that correspond to the other servers
1979: in the network. Management of these processes can be done at the
1980: parent process level or the child process level.
1981:
1982: B<logs/lond.log> is the location of log messages.
1983:
1984: The process management is now explained in terms of linux shell commands,
1985: subroutines internal to this code, and signal assignments:
1986:
1987: =over 4
1988:
1989: =item *
1990:
1991: PID is stored in B<logs/lond.pid>
1992:
1993: This is the process id number of the parent B<lond> process.
1994:
1995: =item *
1996:
1997: SIGTERM and SIGINT
1998:
1999: Parent signal assignment:
2000: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
2001:
2002: Child signal assignment:
2003: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
2004: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
2005: to restart a new child.)
2006:
2007: Command-line invocations:
2008: B<kill> B<-s> SIGTERM I<PID>
2009: B<kill> B<-s> SIGINT I<PID>
2010:
2011: Subroutine B<HUNTSMAN>:
2012: This is only invoked for the B<lond> parent I<PID>.
2013: This kills all the children, and then the parent.
2014: The B<lonc.pid> file is cleared.
2015:
2016: =item *
2017:
2018: SIGHUP
2019:
2020: Current bug:
2021: This signal can only be processed the first time
2022: on the parent process. Subsequent SIGHUP signals
2023: have no effect.
2024:
2025: Parent signal assignment:
2026: $SIG{HUP} = \&HUPSMAN;
2027:
2028: Child signal assignment:
2029: none (nothing happens)
2030:
2031: Command-line invocations:
2032: B<kill> B<-s> SIGHUP I<PID>
2033:
2034: Subroutine B<HUPSMAN>:
2035: This is only invoked for the B<lond> parent I<PID>,
2036: This kills all the children, and then the parent.
2037: The B<lond.pid> file is cleared.
2038:
2039: =item *
2040:
2041: SIGUSR1
2042:
2043: Parent signal assignment:
2044: $SIG{USR1} = \&USRMAN;
2045:
2046: Child signal assignment:
2047: $SIG{USR1}= \&logstatus;
2048:
2049: Command-line invocations:
2050: B<kill> B<-s> SIGUSR1 I<PID>
2051:
2052: Subroutine B<USRMAN>:
2053: When invoked for the B<lond> parent I<PID>,
2054: SIGUSR1 is sent to all the children, and the status of
2055: each connection is logged.
2056:
2057: =item *
2058:
2059: SIGCHLD
2060:
2061: Parent signal assignment:
2062: $SIG{CHLD} = \&REAPER;
2063:
2064: Child signal assignment:
2065: none
2066:
2067: Command-line invocations:
2068: B<kill> B<-s> SIGCHLD I<PID>
2069:
2070: Subroutine B<REAPER>:
2071: This is only invoked for the B<lond> parent I<PID>.
2072: Information pertaining to the child is removed.
2073: The socket port is cleaned up.
2074:
2075: =back
2076:
2077: B<SERVER-SIDE ACTIVITIES>
2078:
2079: Server-side information can be accepted in an encrypted or non-encrypted
2080: method.
2081:
2082: =over 4
2083:
2084: =item ping
2085:
2086: Query a client in the hosts.tab table; "Are you there?"
2087:
2088: =item pong
2089:
2090: Respond to a ping query.
2091:
2092: =item ekey
2093:
2094: Read in encrypted key, make cipher. Respond with a buildkey.
2095:
2096: =item load
2097:
2098: Respond with CPU load based on a computation upon /proc/loadavg.
2099:
2100: =item currentauth
2101:
2102: Reply with current authentication information (only over an
2103: encrypted channel).
2104:
2105: =item auth
2106:
2107: Only over an encrypted channel, reply as to whether a user's
2108: authentication information can be validated.
2109:
2110: =item passwd
2111:
2112: Allow for a password to be set.
2113:
2114: =item makeuser
2115:
2116: Make a user.
2117:
2118: =item passwd
2119:
2120: Allow for authentication mechanism and password to be changed.
2121:
2122: =item home
2123:
2124: Respond to a question "are you the home for a given user?"
2125:
2126: =item update
2127:
2128: Update contents of a subscribed resource.
2129:
2130: =item unsubscribe
2131:
2132: The server is unsubscribing from a resource.
2133:
2134: =item subscribe
2135:
2136: The server is subscribing to a resource.
2137:
2138: =item log
2139:
2140: Place in B<logs/lond.log>
2141:
2142: =item put
2143:
2144: stores hash in namespace
2145:
2146: =item rolesput
2147:
2148: put a role into a user's environment
2149:
2150: =item get
2151:
2152: returns hash with keys from array
2153: reference filled in from namespace
2154:
2155: =item eget
2156:
2157: returns hash with keys from array
2158: reference filled in from namesp (encrypts the return communication)
2159:
2160: =item rolesget
2161:
2162: get a role from a user's environment
2163:
2164: =item del
2165:
2166: deletes keys out of array from namespace
2167:
2168: =item keys
2169:
2170: returns namespace keys
2171:
2172: =item dump
2173:
2174: dumps the complete (or key matching regexp) namespace into a hash
2175:
2176: =item store
2177:
2178: stores hash permanently
2179: for this url; hashref needs to be given and should be a \%hashname; the
2180: remaining args aren't required and if they aren't passed or are '' they will
2181: be derived from the ENV
2182:
2183: =item restore
2184:
2185: returns a hash for a given url
2186:
2187: =item querysend
2188:
2189: Tells client about the lonsql process that has been launched in response
2190: to a sent query.
2191:
2192: =item queryreply
2193:
2194: Accept information from lonsql and make appropriate storage in temporary
2195: file space.
2196:
2197: =item idput
2198:
2199: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2200: for each student, defined perhaps by the institutional Registrar.)
2201:
2202: =item idget
2203:
2204: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2205: for each student, defined perhaps by the institutional Registrar.)
2206:
2207: =item tmpput
2208:
2209: Accept and store information in temporary space.
2210:
2211: =item tmpget
2212:
2213: Send along temporarily stored information.
2214:
2215: =item ls
2216:
2217: List part of a user's directory.
2218:
2219: =item Hanging up (exit or init)
2220:
2221: What to do when a client tells the server that they (the client)
2222: are leaving the network.
2223:
2224: =item unknown command
2225:
2226: If B<lond> is sent an unknown command (not in the list above),
2227: it replys to the client "unknown_cmd".
2228:
2229: =item UNKNOWN CLIENT
2230:
2231: If the anti-spoofing algorithm cannot verify the client,
2232: the client is rejected (with a "refused" message sent
2233: to the client, and the connection is closed.
2234:
2235: =back
2236:
2237: =head1 PREREQUISITES
2238:
2239: IO::Socket
2240: IO::File
2241: Apache::File
2242: Symbol
2243: POSIX
2244: Crypt::IDEA
2245: LWP::UserAgent()
2246: GDBM_File
2247: Authen::Krb4
2248: Authen::Krb5
2249:
2250: =head1 COREQUISITES
2251:
2252: =head1 OSNAMES
2253:
2254: linux
2255:
2256: =head1 SCRIPT CATEGORIES
2257:
2258: Server/Process
2259:
2260: =cut
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