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[LON-CAPA] /
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lond
Revision
1.126:
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Tue May 6 21:36:42 2003 UTC (20 years, 11 months ago) by
albertel
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CVS tags:
HEAD
- perl 5.8 didn't like the CHLD handler still being set in the CHLD, the pwauth children were getting reaped and we weren't getting valid returtn codes, thus unix auth on shadow systems failed
- Apache::File doesn't seem to be used
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.126 2003/05/06 21:36:42 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 $VERSION='$Revision: 1.126 $'; #' stupid emacs
77: my $remoteVERSION;
78: my $currenthostid;
79: my $currentdomainid;
80: #
81: # The array below are password error strings."
82: #
83: my $lastpwderror = 13; # Largest error number from lcpasswd.
84: my @passwderrors = ("ok",
85: "lcpasswd must be run as user 'www'",
86: "lcpasswd got incorrect number of arguments",
87: "lcpasswd did not get the right nubmer of input text lines",
88: "lcpasswd too many simultaneous pwd changes in progress",
89: "lcpasswd User does not exist.",
90: "lcpasswd Incorrect current passwd",
91: "lcpasswd Unable to su to root.",
92: "lcpasswd Cannot set new passwd.",
93: "lcpasswd Username has invalid characters",
94: "lcpasswd Invalid characters in password",
95: "11", "12",
96: "lcpasswd Password mismatch");
97:
98:
99: # The array below are lcuseradd error strings.:
100:
101: my $lastadderror = 13;
102: my @adderrors = ("ok",
103: "User ID mismatch, lcuseradd must run as user www",
104: "lcuseradd Incorrect number of command line parameters must be 3",
105: "lcuseradd Incorrect number of stdinput lines, must be 3",
106: "lcuseradd Too many other simultaneous pwd changes in progress",
107: "lcuseradd User does not exist",
108: "lcuseradd Unabel to mak ewww member of users's group",
109: "lcuseradd Unable to su to root",
110: "lcuseradd Unable to set password",
111: "lcuseradd Usrname has invbalid charcters",
112: "lcuseradd Password has an invalid character",
113: "lcuseradd User already exists",
114: "lcuseradd Could not add user.",
115: "lcuseradd Password mismatch");
116:
117:
118: #
119: # Convert an error return code from lcpasswd to a string value.
120: #
121: sub lcpasswdstrerror {
122: my $ErrorCode = shift;
123: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
124: return "lcpasswd Unrecognized error return value ".$ErrorCode;
125: } else {
126: return $passwderrors[$ErrorCode];
127: }
128: }
129:
130: #
131: # Convert an error return code from lcuseradd to a string value:
132: #
133: sub lcuseraddstrerror {
134: my $ErrorCode = shift;
135: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
136: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
137: } else {
138: return $adderrors[$ErrorCode];
139: }
140: }
141:
142: # grabs exception and records it to log before exiting
143: sub catchexception {
144: my ($error)=@_;
145: $SIG{'QUIT'}='DEFAULT';
146: $SIG{__DIE__}='DEFAULT';
147: &logthis("<font color=red>CRITICAL: "
148: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
149: ."a crash with this error msg->[$error]</font>");
150: &logthis('Famous last words: '.$status.' - '.$lastlog);
151: if ($client) { print $client "error: $error\n"; }
152: $server->close();
153: die($error);
154: }
155:
156: sub timeout {
157: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
158: &catchexception('Timeout');
159: }
160: # -------------------------------- Set signal handlers to record abnormal exits
161:
162: $SIG{'QUIT'}=\&catchexception;
163: $SIG{__DIE__}=\&catchexception;
164:
165: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
166: &status("Read loncapa.conf and loncapa_apache.conf");
167: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
168: my %perlvar=%{$perlvarref};
169: undef $perlvarref;
170:
171: # ----------------------------- Make sure this process is running from user=www
172: my $wwwid=getpwnam('www');
173: if ($wwwid!=$<) {
174: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
175: $subj="LON: $currenthostid User ID mismatch";
176: system("echo 'User ID mismatch. lond must be run as user www.' |\
177: mailto $emailto -s '$subj' > /dev/null");
178: exit 1;
179: }
180:
181: # --------------------------------------------- Check if other instance running
182:
183: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
184:
185: if (-e $pidfile) {
186: my $lfh=IO::File->new("$pidfile");
187: my $pide=<$lfh>;
188: chomp($pide);
189: if (kill 0 => $pide) { die "already running"; }
190: }
191:
192: $PREFORK=4; # number of children to maintain, at least four spare
193:
194: # ------------------------------------------------------------- Read hosts file
195:
196: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
197:
198: while ($configline=<CONFIG>) {
199: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
200: chomp($ip); $ip=~s/\D+$//;
201: $hostid{$ip}=$id;
202: $hostdom{$id}=$domain;
203: $hostip{$id}=$ip;
204: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
205: $PREFORK++;
206: }
207: close(CONFIG);
208:
209: # establish SERVER socket, bind and listen.
210: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
211: Type => SOCK_STREAM,
212: Proto => 'tcp',
213: Reuse => 1,
214: Listen => 10 )
215: or die "making socket: $@\n";
216:
217: # --------------------------------------------------------- Do global variables
218:
219: # global variables
220:
221: $MAX_CLIENTS_PER_CHILD = 50; # number of clients each child should
222: # process
223: %children = (); # keys are current child process IDs
224: $children = 0; # current number of children
225:
226: sub REAPER { # takes care of dead children
227: $SIG{CHLD} = \&REAPER;
228: my $pid = wait;
229: if (defined($children{$pid})) {
230: &logthis("Child $pid died");
231: $children --;
232: delete $children{$pid};
233: } else {
234: &logthis("Unknown Child $pid died");
235: }
236: }
237:
238: sub HUNTSMAN { # signal handler for SIGINT
239: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
240: kill 'INT' => keys %children;
241: &logthis("Free socket: ".shutdown($server,2)); # free up socket
242: my $execdir=$perlvar{'lonDaemons'};
243: unlink("$execdir/logs/lond.pid");
244: &logthis("<font color=red>CRITICAL: Shutting down</font>");
245: exit; # clean up with dignity
246: }
247:
248: sub HUPSMAN { # signal handler for SIGHUP
249: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
250: kill 'INT' => keys %children;
251: &logthis("Free socket: ".shutdown($server,2)); # free up socket
252: &logthis("<font color=red>CRITICAL: Restarting</font>");
253: unlink("$execdir/logs/lond.pid");
254: my $execdir=$perlvar{'lonDaemons'};
255: exec("$execdir/lond"); # here we go again
256: }
257:
258: sub checkchildren {
259: &initnewstatus();
260: &logstatus();
261: &logthis('Going to check on the children');
262: $docdir=$perlvar{'lonDocRoot'};
263: foreach (sort keys %children) {
264: sleep 1;
265: unless (kill 'USR1' => $_) {
266: &logthis ('Child '.$_.' is dead');
267: &logstatus($$.' is dead');
268: }
269: }
270: sleep 5;
271: $SIG{ALRM} = sub { die "timeout" };
272: $SIG{__DIE__} = 'DEFAULT';
273: foreach (sort keys %children) {
274: unless (-e "$docdir/lon-status/londchld/$_.txt") {
275: eval {
276: alarm(300);
277: &logthis('Child '.$_.' did not respond');
278: kill 9 => $_;
279: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
280: $subj="LON: $currenthostid killed lond process $_";
281: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
282: $execdir=$perlvar{'lonDaemons'};
283: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
284: alarm(0);
285: }
286: }
287: }
288: $SIG{ALRM} = 'DEFAULT';
289: $SIG{__DIE__} = \&cathcexception;
290: }
291:
292: # --------------------------------------------------------------------- Logging
293:
294: sub logthis {
295: my $message=shift;
296: my $execdir=$perlvar{'lonDaemons'};
297: my $fh=IO::File->new(">>$execdir/logs/lond.log");
298: my $now=time;
299: my $local=localtime($now);
300: $lastlog=$local.': '.$message;
301: print $fh "$local ($$): $message\n";
302: }
303:
304: # ------------------------- Conditional log if $DEBUG true.
305: sub Debug {
306: my $message = shift;
307: if($DEBUG) {
308: &logthis($message);
309: }
310: }
311: # ------------------------------------------------------------------ Log status
312:
313: sub logstatus {
314: my $docdir=$perlvar{'lonDocRoot'};
315: {
316: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
317: print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
318: $fh->close();
319: }
320: {
321: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
322: print $fh $status."\n".$lastlog."\n".time;
323: $fh->close();
324: }
325: }
326:
327: sub initnewstatus {
328: my $docdir=$perlvar{'lonDocRoot'};
329: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
330: my $now=time;
331: my $local=localtime($now);
332: print $fh "LOND status $local - parent $$\n\n";
333: opendir(DIR,"$docdir/lon-status/londchld");
334: while ($filename=readdir(DIR)) {
335: unlink("$docdir/lon-status/londchld/$filename");
336: }
337: closedir(DIR);
338: }
339:
340: # -------------------------------------------------------------- Status setting
341:
342: sub status {
343: my $what=shift;
344: my $now=time;
345: my $local=localtime($now);
346: $status=$local.': '.$what;
347: $0='lond: '.$what.' '.$local;
348: }
349:
350: # -------------------------------------------------------- Escape Special Chars
351:
352: sub escape {
353: my $str=shift;
354: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
355: return $str;
356: }
357:
358: # ----------------------------------------------------- Un-Escape Special Chars
359:
360: sub unescape {
361: my $str=shift;
362: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
363: return $str;
364: }
365:
366: # ----------------------------------------------------------- Send USR1 to lonc
367:
368: sub reconlonc {
369: my $peerfile=shift;
370: &logthis("Trying to reconnect for $peerfile");
371: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
372: if (my $fh=IO::File->new("$loncfile")) {
373: my $loncpid=<$fh>;
374: chomp($loncpid);
375: if (kill 0 => $loncpid) {
376: &logthis("lonc at pid $loncpid responding, sending USR1");
377: kill USR1 => $loncpid;
378: } else {
379: &logthis(
380: "<font color=red>CRITICAL: "
381: ."lonc at pid $loncpid not responding, giving up</font>");
382: }
383: } else {
384: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
385: }
386: }
387:
388: # -------------------------------------------------- Non-critical communication
389:
390: sub subreply {
391: my ($cmd,$server)=@_;
392: my $peerfile="$perlvar{'lonSockDir'}/$server";
393: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
394: Type => SOCK_STREAM,
395: Timeout => 10)
396: or return "con_lost";
397: print $sclient "$cmd\n";
398: my $answer=<$sclient>;
399: chomp($answer);
400: if (!$answer) { $answer="con_lost"; }
401: return $answer;
402: }
403:
404: sub reply {
405: my ($cmd,$server)=@_;
406: my $answer;
407: if ($server ne $currenthostid) {
408: $answer=subreply($cmd,$server);
409: if ($answer eq 'con_lost') {
410: $answer=subreply("ping",$server);
411: if ($answer ne $server) {
412: &logthis("sub reply: answer != server answer is $answer, server is $server");
413: &reconlonc("$perlvar{'lonSockDir'}/$server");
414: }
415: $answer=subreply($cmd,$server);
416: }
417: } else {
418: $answer='self_reply';
419: }
420: return $answer;
421: }
422:
423: # -------------------------------------------------------------- Talk to lonsql
424:
425: sub sqlreply {
426: my ($cmd)=@_;
427: my $answer=subsqlreply($cmd);
428: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
429: return $answer;
430: }
431:
432: sub subsqlreply {
433: my ($cmd)=@_;
434: my $unixsock="mysqlsock";
435: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
436: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
437: Type => SOCK_STREAM,
438: Timeout => 10)
439: or return "con_lost";
440: print $sclient "$cmd\n";
441: my $answer=<$sclient>;
442: chomp($answer);
443: if (!$answer) { $answer="con_lost"; }
444: return $answer;
445: }
446:
447: # -------------------------------------------- Return path to profile directory
448:
449: sub propath {
450: my ($udom,$uname)=@_;
451: $udom=~s/\W//g;
452: $uname=~s/\W//g;
453: my $subdir=$uname.'__';
454: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
455: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
456: return $proname;
457: }
458:
459: # --------------------------------------- Is this the home server of an author?
460:
461: sub ishome {
462: my $author=shift;
463: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
464: my ($udom,$uname)=split(/\//,$author);
465: my $proname=propath($udom,$uname);
466: if (-e $proname) {
467: return 'owner';
468: } else {
469: return 'not_owner';
470: }
471: }
472:
473: # ======================================================= Continue main program
474: # ---------------------------------------------------- Fork once and dissociate
475:
476: $fpid=fork;
477: exit if $fpid;
478: die "Couldn't fork: $!" unless defined ($fpid);
479:
480: POSIX::setsid() or die "Can't start new session: $!";
481:
482: # ------------------------------------------------------- Write our PID on disk
483:
484: $execdir=$perlvar{'lonDaemons'};
485: open (PIDSAVE,">$execdir/logs/lond.pid");
486: print PIDSAVE "$$\n";
487: close(PIDSAVE);
488: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
489: &status('Starting');
490:
491:
492:
493: # ----------------------------------------------------- Install signal handlers
494:
495:
496: $SIG{CHLD} = \&REAPER;
497: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
498: $SIG{HUP} = \&HUPSMAN;
499: $SIG{USR1} = \&checkchildren;
500:
501:
502:
503: # --------------------------------------------------------------
504: # Accept connections. When a connection comes in, it is validated
505: # and if good, a child process is created to process transactions
506: # along the connection.
507:
508: while (1) {
509: $client = $server->accept() or next;
510: make_new_child($client);
511: }
512:
513: sub make_new_child {
514: my $client;
515: my $pid;
516: my $cipher;
517: my $sigset;
518:
519: $client = shift;
520: &logthis("Attempting to start child");
521: # block signal for fork
522: $sigset = POSIX::SigSet->new(SIGINT);
523: sigprocmask(SIG_BLOCK, $sigset)
524: or die "Can't block SIGINT for fork: $!\n";
525:
526: die "fork: $!" unless defined ($pid = fork);
527:
528: if ($pid) {
529: # Parent records the child's birth and returns.
530: sigprocmask(SIG_UNBLOCK, $sigset)
531: or die "Can't unblock SIGINT for fork: $!\n";
532: $children{$pid} = 1;
533: $children++;
534: &status('Started child '.$pid);
535: return;
536: } else {
537: # Child can *not* return from this subroutine.
538: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
539: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns
540: #don't get intercepted
541: $SIG{USR1}= \&logstatus;
542: $SIG{ALRM}= \&timeout;
543: $lastlog='Forked ';
544: $status='Forked';
545:
546: # unblock signals
547: sigprocmask(SIG_UNBLOCK, $sigset)
548: or die "Can't unblock SIGINT for fork: $!\n";
549:
550: $tmpsnum=0;
551: #---------------------------------------------------- kerberos 5 initialization
552: &Authen::Krb5::init_context();
553: &Authen::Krb5::init_ets();
554:
555: &status('Accepted connection');
556: # =============================================================================
557: # do something with the connection
558: # -----------------------------------------------------------------------------
559: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
560: # connection liveness.
561: # see if we know client and check for spoof IP by challenge
562: my $caller = getpeername($client);
563: my ($port,$iaddr)=unpack_sockaddr_in($caller);
564: my $clientip=inet_ntoa($iaddr);
565: my $clientrec=($hostid{$clientip} ne undef);
566: &logthis(
567: "<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
568: );
569: &status("Connecting $clientip ($hostid{$clientip})");
570: my $clientok;
571: if ($clientrec) {
572: &status("Waiting for init from $clientip ($hostid{$clientip})");
573: my $remotereq=<$client>;
574: $remotereq=~s/[^\w:]//g;
575: if ($remotereq =~ /^init/) {
576: &sethost("sethost:$perlvar{'lonHostID'}");
577: my $challenge="$$".time;
578: print $client "$challenge\n";
579: &status(
580: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
581: $remotereq=<$client>;
582: $remotereq=~s/\W//g;
583: if ($challenge eq $remotereq) {
584: $clientok=1;
585: print $client "ok\n";
586: } else {
587: &logthis(
588: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
589: &status('No challenge reply '.$clientip);
590: }
591: } else {
592: &logthis(
593: "<font color=blue>WARNING: "
594: ."$clientip failed to initialize: >$remotereq< </font>");
595: &status('No init '.$clientip);
596: }
597: } else {
598: &logthis(
599: "<font color=blue>WARNING: Unknown client $clientip</font>");
600: &status('Hung up on '.$clientip);
601: }
602: if ($clientok) {
603: # ---------------- New known client connecting, could mean machine online again
604:
605: foreach my $id (keys(%hostip)) {
606: if ($hostip{$id} ne $clientip ||
607: $hostip{$currenthostid} eq $clientip) {
608: # no need to try to do recon's to myself
609: next;
610: }
611: &reconlonc("$perlvar{'lonSockDir'}/$id");
612: }
613: &logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
614: &status('Will listen to '.$hostid{$clientip});
615: # ------------------------------------------------------------ Process requests
616: while (my $userinput=<$client>) {
617: chomp($userinput);
618: Debug("Request = $userinput\n");
619: &status('Processing '.$hostid{$clientip}.': '.$userinput);
620: my $wasenc=0;
621: alarm(120);
622: # ------------------------------------------------------------ See if encrypted
623: if ($userinput =~ /^enc/) {
624: if ($cipher) {
625: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
626: $userinput='';
627: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
628: $userinput.=
629: $cipher->decrypt(
630: pack("H16",substr($encinput,$encidx,16))
631: );
632: }
633: $userinput=substr($userinput,0,$cmdlength);
634: $wasenc=1;
635: }
636: }
637:
638: # ------------------------------------------------------------- Normal commands
639: # ------------------------------------------------------------------------ ping
640: if ($userinput =~ /^ping/) {
641: print $client "$currenthostid\n";
642: # ------------------------------------------------------------------------ pong
643: } elsif ($userinput =~ /^pong/) {
644: $reply=reply("ping",$hostid{$clientip});
645: print $client "$currenthostid:$reply\n";
646: # ------------------------------------------------------------------------ ekey
647: } elsif ($userinput =~ /^ekey/) {
648: my $buildkey=time.$$.int(rand 100000);
649: $buildkey=~tr/1-6/A-F/;
650: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
651: my $key=$currenthostid.$hostid{$clientip};
652: $key=~tr/a-z/A-Z/;
653: $key=~tr/G-P/0-9/;
654: $key=~tr/Q-Z/0-9/;
655: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
656: $key=substr($key,0,32);
657: my $cipherkey=pack("H32",$key);
658: $cipher=new IDEA $cipherkey;
659: print $client "$buildkey\n";
660: # ------------------------------------------------------------------------ load
661: } elsif ($userinput =~ /^load/) {
662: my $loadavg;
663: {
664: my $loadfile=IO::File->new('/proc/loadavg');
665: $loadavg=<$loadfile>;
666: }
667: $loadavg =~ s/\s.*//g;
668: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
669: print $client "$loadpercent\n";
670: # ----------------------------------------------------------------- currentauth
671: } elsif ($userinput =~ /^currentauth/) {
672: if ($wasenc==1) {
673: my ($cmd,$udom,$uname)=split(/:/,$userinput);
674: my $result = GetAuthType($udom, $uname);
675: if($result eq "nouser") {
676: print $client "unknown_user\n";
677: }
678: else {
679: print $client "$result\n"
680: }
681: } else {
682: print $client "refused\n";
683: }
684: # ------------------------------------------------------------------------ auth
685: } elsif ($userinput =~ /^auth/) {
686: if ($wasenc==1) {
687: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
688: chomp($upass);
689: $upass=unescape($upass);
690: my $proname=propath($udom,$uname);
691: my $passfilename="$proname/passwd";
692: if (-e $passfilename) {
693: my $pf = IO::File->new($passfilename);
694: my $realpasswd=<$pf>;
695: chomp($realpasswd);
696: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
697: my $pwdcorrect=0;
698: if ($howpwd eq 'internal') {
699: &Debug("Internal auth");
700: $pwdcorrect=
701: (crypt($upass,$contentpwd) eq $contentpwd);
702: } elsif ($howpwd eq 'unix') {
703: &Debug("Unix auth");
704: if((getpwnam($uname))[1] eq "") { #no such user!
705: $pwdcorrect = 0;
706: } else {
707: $contentpwd=(getpwnam($uname))[1];
708: my $pwauth_path="/usr/local/sbin/pwauth";
709: unless ($contentpwd eq 'x') {
710: $pwdcorrect=
711: (crypt($upass,$contentpwd) eq
712: $contentpwd);
713: }
714:
715: elsif (-e $pwauth_path) {
716: open PWAUTH, "|$pwauth_path" or
717: die "Cannot invoke authentication";
718: print PWAUTH "$uname\n$upass\n";
719: close PWAUTH;
720: $pwdcorrect=!$?;
721: }
722: }
723: } elsif ($howpwd eq 'krb4') {
724: $null=pack("C",0);
725: unless ($upass=~/$null/) {
726: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
727: ($uname,"",$contentpwd,'krbtgt',
728: $contentpwd,1,$upass);
729: if (!$krb4_error) {
730: $pwdcorrect = 1;
731: } else {
732: $pwdcorrect=0;
733: # log error if it is not a bad password
734: if ($krb4_error != 62) {
735: &logthis('krb4:'.$uname.','.$contentpwd.','.
736: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
737: }
738: }
739: }
740: } elsif ($howpwd eq 'krb5') {
741: $null=pack("C",0);
742: unless ($upass=~/$null/) {
743: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
744: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
745: my $krbserver=&Authen::Krb5::parse_name($krbservice);
746: my $credentials=&Authen::Krb5::cc_default();
747: $credentials->initialize($krbclient);
748: my $krbreturn =
749: &Authen::Krb5::get_in_tkt_with_password(
750: $krbclient,$krbserver,$upass,$credentials);
751: # unless ($krbreturn) {
752: # &logthis("Krb5 Error: ".
753: # &Authen::Krb5::error());
754: # }
755: $pwdcorrect = ($krbreturn == 1);
756: } else { $pwdcorrect=0; }
757: } elsif ($howpwd eq 'localauth') {
758: $pwdcorrect=&localauth::localauth($uname,$upass,
759: $contentpwd);
760: }
761: if ($pwdcorrect) {
762: print $client "authorized\n";
763: } else {
764: print $client "non_authorized\n";
765: }
766: } else {
767: print $client "unknown_user\n";
768: }
769: } else {
770: print $client "refused\n";
771: }
772: # ---------------------------------------------------------------------- passwd
773: } elsif ($userinput =~ /^passwd/) {
774: if ($wasenc==1) {
775: my
776: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
777: chomp($npass);
778: $upass=&unescape($upass);
779: $npass=&unescape($npass);
780: &Debug("Trying to change password for $uname");
781: my $proname=propath($udom,$uname);
782: my $passfilename="$proname/passwd";
783: if (-e $passfilename) {
784: my $realpasswd;
785: { my $pf = IO::File->new($passfilename);
786: $realpasswd=<$pf>; }
787: chomp($realpasswd);
788: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
789: if ($howpwd eq 'internal') {
790: &Debug("internal auth");
791: if (crypt($upass,$contentpwd) eq $contentpwd) {
792: my $salt=time;
793: $salt=substr($salt,6,2);
794: my $ncpass=crypt($npass,$salt);
795: { my $pf = IO::File->new(">$passfilename");
796: print $pf "internal:$ncpass\n"; }
797: &logthis("Result of password change for $uname: pwchange_success");
798: print $client "ok\n";
799: } else {
800: print $client "non_authorized\n";
801: }
802: } elsif ($howpwd eq 'unix') {
803: # Unix means we have to access /etc/password
804: # one way or another.
805: # First: Make sure the current password is
806: # correct
807: &Debug("auth is unix");
808: $contentpwd=(getpwnam($uname))[1];
809: my $pwdcorrect = "0";
810: my $pwauth_path="/usr/local/sbin/pwauth";
811: unless ($contentpwd eq 'x') {
812: $pwdcorrect=
813: (crypt($upass,$contentpwd) eq $contentpwd);
814: } elsif (-e $pwauth_path) {
815: open PWAUTH, "|$pwauth_path" or
816: die "Cannot invoke authentication";
817: print PWAUTH "$uname\n$upass\n";
818: close PWAUTH;
819: &Debug("exited pwauth with $? ($uname,$upass) ");
820: $pwdcorrect=($? == 0);
821: }
822: if ($pwdcorrect) {
823: my $execdir=$perlvar{'lonDaemons'};
824: &Debug("Opening lcpasswd pipeline");
825: my $pf = IO::File->new("|$execdir/lcpasswd > /home/www/lcpasswd.log");
826: print $pf "$uname\n$npass\n$npass\n";
827: close $pf;
828: my $err = $?;
829: my $result = ($err>0 ? 'pwchange_failure'
830: : 'ok');
831: &logthis("Result of password change for $uname: ".
832: &lcpasswdstrerror($?));
833: print $client "$result\n";
834: } else {
835: print $client "non_authorized\n";
836: }
837: } else {
838: print $client "auth_mode_error\n";
839: }
840: } else {
841: print $client "unknown_user\n";
842: }
843: } else {
844: print $client "refused\n";
845: }
846: # -------------------------------------------------------------------- makeuser
847: } elsif ($userinput =~ /^makeuser/) {
848: &Debug("Make user received");
849: my $oldumask=umask(0077);
850: if ($wasenc==1) {
851: my
852: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
853: &Debug("cmd =".$cmd." $udom =".$udom.
854: " uname=".$uname);
855: chomp($npass);
856: $npass=&unescape($npass);
857: my $proname=propath($udom,$uname);
858: my $passfilename="$proname/passwd";
859: &Debug("Password file created will be:".
860: $passfilename);
861: if (-e $passfilename) {
862: print $client "already_exists\n";
863: } elsif ($udom ne $currentdomainid) {
864: print $client "not_right_domain\n";
865: } else {
866: @fpparts=split(/\//,$proname);
867: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
868: $fperror='';
869: for ($i=3;$i<=$#fpparts;$i++) {
870: $fpnow.='/'.$fpparts[$i];
871: unless (-e $fpnow) {
872: unless (mkdir($fpnow,0777)) {
873: $fperror="error: ".($!+0)
874: ." mkdir failed while attempting "
875: ."makeuser\n";
876: }
877: }
878: }
879: unless ($fperror) {
880: my $result=&make_passwd_file($uname, $umode,$npass,
881: $passfilename);
882: print $client $result;
883: } else {
884: print $client "$fperror\n";
885: }
886: }
887: } else {
888: print $client "refused\n";
889: }
890: umask($oldumask);
891: # -------------------------------------------------------------- changeuserauth
892: } elsif ($userinput =~ /^changeuserauth/) {
893: &Debug("Changing authorization");
894: if ($wasenc==1) {
895: my
896: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
897: chomp($npass);
898: &Debug("cmd = ".$cmd." domain= ".$udom.
899: "uname =".$uname." umode= ".$umode);
900: $npass=&unescape($npass);
901: my $proname=&propath($udom,$uname);
902: my $passfilename="$proname/passwd";
903: if ($udom ne $currentdomainid) {
904: print $client "not_right_domain\n";
905: } else {
906: my $result=&make_passwd_file($uname, $umode,$npass,
907: $passfilename);
908: print $client $result;
909: }
910: } else {
911: print $client "refused\n";
912: }
913: # ------------------------------------------------------------------------ home
914: } elsif ($userinput =~ /^home/) {
915: my ($cmd,$udom,$uname)=split(/:/,$userinput);
916: chomp($uname);
917: my $proname=propath($udom,$uname);
918: if (-e $proname) {
919: print $client "found\n";
920: } else {
921: print $client "not_found\n";
922: }
923: # ---------------------------------------------------------------------- update
924: } elsif ($userinput =~ /^update/) {
925: my ($cmd,$fname)=split(/:/,$userinput);
926: my $ownership=ishome($fname);
927: if ($ownership eq 'not_owner') {
928: if (-e $fname) {
929: my ($dev,$ino,$mode,$nlink,
930: $uid,$gid,$rdev,$size,
931: $atime,$mtime,$ctime,
932: $blksize,$blocks)=stat($fname);
933: $now=time;
934: $since=$now-$atime;
935: if ($since>$perlvar{'lonExpire'}) {
936: $reply=
937: reply("unsub:$fname","$hostid{$clientip}");
938: unlink("$fname");
939: } else {
940: my $transname="$fname.in.transfer";
941: my $remoteurl=
942: reply("sub:$fname","$hostid{$clientip}");
943: my $response;
944: {
945: my $ua=new LWP::UserAgent;
946: my $request=new HTTP::Request('GET',"$remoteurl");
947: $response=$ua->request($request,$transname);
948: }
949: if ($response->is_error()) {
950: unlink($transname);
951: my $message=$response->status_line;
952: &logthis(
953: "LWP GET: $message for $fname ($remoteurl)");
954: } else {
955: if ($remoteurl!~/\.meta$/) {
956: my $ua=new LWP::UserAgent;
957: my $mrequest=
958: new HTTP::Request('GET',$remoteurl.'.meta');
959: my $mresponse=
960: $ua->request($mrequest,$fname.'.meta');
961: if ($mresponse->is_error()) {
962: unlink($fname.'.meta');
963: }
964: }
965: rename($transname,$fname);
966: }
967: }
968: print $client "ok\n";
969: } else {
970: print $client "not_found\n";
971: }
972: } else {
973: print $client "rejected\n";
974: }
975: # -------------------------------------- fetch a user file from a remote server
976: } elsif ($userinput =~ /^fetchuserfile/) {
977: my ($cmd,$fname)=split(/:/,$userinput);
978: my ($udom,$uname,$ufile)=split(/\//,$fname);
979: my $udir=propath($udom,$uname).'/userfiles';
980: unless (-e $udir) { mkdir($udir,0770); }
981: if (-e $udir) {
982: $ufile=~s/^[\.\~]+//;
983: $ufile=~s/\///g;
984: my $transname=$udir.'/'.$ufile;
985: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
986: my $response;
987: {
988: my $ua=new LWP::UserAgent;
989: my $request=new HTTP::Request('GET',"$remoteurl");
990: $response=$ua->request($request,$transname);
991: }
992: if ($response->is_error()) {
993: unlink($transname);
994: my $message=$response->status_line;
995: &logthis(
996: "LWP GET: $message for $fname ($remoteurl)");
997: print $client "failed\n";
998: } else {
999: print $client "ok\n";
1000: }
1001: } else {
1002: print $client "not_home\n";
1003: }
1004: # ------------------------------------------ authenticate access to a user file
1005: } elsif ($userinput =~ /^tokenauthuserfile/) {
1006: my ($cmd,$fname,$session)=split(/:/,$userinput);
1007: chomp($session);
1008: $reply='non_auth';
1009: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1010: $session.'.id')) {
1011: while ($line=<ENVIN>) {
1012: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1013: }
1014: close(ENVIN);
1015: print $client $reply."\n";
1016: } else {
1017: print $client "invalid_token\n";
1018: }
1019: # ----------------------------------------------------------------- unsubscribe
1020: } elsif ($userinput =~ /^unsub/) {
1021: my ($cmd,$fname)=split(/:/,$userinput);
1022: if (-e $fname) {
1023: print $client &unsub($client,$fname,$clientip);
1024: } else {
1025: print $client "not_found\n";
1026: }
1027: # ------------------------------------------------------------------- subscribe
1028: } elsif ($userinput =~ /^sub/) {
1029: print $client &subscribe($userinput,$clientip);
1030: # ------------------------------------------------------------- current version
1031: } elsif ($userinput =~ /^currentversion/) {
1032: my ($cmd,$fname)=split(/:/,$userinput);
1033: print $client ¤tversion($fname)."\n";
1034: # ------------------------------------------------------------------------- log
1035: } elsif ($userinput =~ /^log/) {
1036: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1037: chomp($what);
1038: my $proname=propath($udom,$uname);
1039: my $now=time;
1040: {
1041: my $hfh;
1042: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1043: print $hfh "$now:$hostid{$clientip}:$what\n";
1044: print $client "ok\n";
1045: } else {
1046: print $client "error: ".($!+0)
1047: ." IO::File->new Failed "
1048: ."while attempting log\n";
1049: }
1050: }
1051: # ------------------------------------------------------------------------- put
1052: } elsif ($userinput =~ /^put/) {
1053: my ($cmd,$udom,$uname,$namespace,$what)
1054: =split(/:/,$userinput);
1055: $namespace=~s/\//\_/g;
1056: $namespace=~s/\W//g;
1057: if ($namespace ne 'roles') {
1058: chomp($what);
1059: my $proname=propath($udom,$uname);
1060: my $now=time;
1061: unless ($namespace=~/^nohist\_/) {
1062: my $hfh;
1063: if (
1064: $hfh=IO::File->new(">>$proname/$namespace.hist")
1065: ) { print $hfh "P:$now:$what\n"; }
1066: }
1067: my @pairs=split(/\&/,$what);
1068: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1069: foreach $pair (@pairs) {
1070: ($key,$value)=split(/=/,$pair);
1071: $hash{$key}=$value;
1072: }
1073: if (untie(%hash)) {
1074: print $client "ok\n";
1075: } else {
1076: print $client "error: ".($!+0)
1077: ." untie(GDBM) failed ".
1078: "while attempting put\n";
1079: }
1080: } else {
1081: print $client "error: ".($!)
1082: ." tie(GDBM) Failed ".
1083: "while attempting put\n";
1084: }
1085: } else {
1086: print $client "refused\n";
1087: }
1088: # -------------------------------------------------------------------- rolesput
1089: } elsif ($userinput =~ /^rolesput/) {
1090: &Debug("rolesput");
1091: if ($wasenc==1) {
1092: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1093: =split(/:/,$userinput);
1094: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1095: "user = ".$exeuser." udom=".$udom.
1096: "what = ".$what);
1097: my $namespace='roles';
1098: chomp($what);
1099: my $proname=propath($udom,$uname);
1100: my $now=time;
1101: {
1102: my $hfh;
1103: if (
1104: $hfh=IO::File->new(">>$proname/$namespace.hist")
1105: ) {
1106: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1107: }
1108: }
1109: my @pairs=split(/\&/,$what);
1110: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1111: foreach $pair (@pairs) {
1112: ($key,$value)=split(/=/,$pair);
1113: &ManagePermissions($key, $udom, $uname,
1114: &GetAuthType( $udom,
1115: $uname));
1116: $hash{$key}=$value;
1117:
1118: }
1119: if (untie(%hash)) {
1120: print $client "ok\n";
1121: } else {
1122: print $client "error: ".($!+0)
1123: ." untie(GDBM) Failed ".
1124: "while attempting rolesput\n";
1125: }
1126: } else {
1127: print $client "error: ".($!+0)
1128: ." tie(GDBM) Failed ".
1129: "while attempting rolesput\n";
1130: }
1131: } else {
1132: print $client "refused\n";
1133: }
1134: # -------------------------------------------------------------------- rolesdel
1135: } elsif ($userinput =~ /^rolesdel/) {
1136: &Debug("rolesdel");
1137: if ($wasenc==1) {
1138: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1139: =split(/:/,$userinput);
1140: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1141: "user = ".$exeuser." udom=".$udom.
1142: "what = ".$what);
1143: my $namespace='roles';
1144: chomp($what);
1145: my $proname=propath($udom,$uname);
1146: my $now=time;
1147: {
1148: my $hfh;
1149: if (
1150: $hfh=IO::File->new(">>$proname/$namespace.hist")
1151: ) {
1152: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1153: }
1154: }
1155: my @rolekeys=split(/\&/,$what);
1156: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1157: foreach $key (@rolekeys) {
1158: delete $hash{$key};
1159:
1160: }
1161: if (untie(%hash)) {
1162: print $client "ok\n";
1163: } else {
1164: print $client "error: ".($!+0)
1165: ." untie(GDBM) Failed ".
1166: "while attempting rolesdel\n";
1167: }
1168: } else {
1169: print $client "error: ".($!+0)
1170: ." tie(GDBM) Failed ".
1171: "while attempting rolesdel\n";
1172: }
1173: } else {
1174: print $client "refused\n";
1175: }
1176: # ------------------------------------------------------------------------- get
1177: } elsif ($userinput =~ /^get/) {
1178: my ($cmd,$udom,$uname,$namespace,$what)
1179: =split(/:/,$userinput);
1180: $namespace=~s/\//\_/g;
1181: $namespace=~s/\W//g;
1182: chomp($what);
1183: my @queries=split(/\&/,$what);
1184: my $proname=propath($udom,$uname);
1185: my $qresult='';
1186: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1187: for ($i=0;$i<=$#queries;$i++) {
1188: $qresult.="$hash{$queries[$i]}&";
1189: }
1190: if (untie(%hash)) {
1191: $qresult=~s/\&$//;
1192: print $client "$qresult\n";
1193: } else {
1194: print $client "error: ".($!+0)
1195: ." untie(GDBM) Failed ".
1196: "while attempting get\n";
1197: }
1198: } else {
1199: if ($!+0 == 2) {
1200: print $client "error:No such file or ".
1201: "GDBM reported bad block error\n";
1202: } else {
1203: print $client "error: ".($!+0)
1204: ." tie(GDBM) Failed ".
1205: "while attempting get\n";
1206: }
1207: }
1208: # ------------------------------------------------------------------------ eget
1209: } elsif ($userinput =~ /^eget/) {
1210: my ($cmd,$udom,$uname,$namespace,$what)
1211: =split(/:/,$userinput);
1212: $namespace=~s/\//\_/g;
1213: $namespace=~s/\W//g;
1214: chomp($what);
1215: my @queries=split(/\&/,$what);
1216: my $proname=propath($udom,$uname);
1217: my $qresult='';
1218: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1219: for ($i=0;$i<=$#queries;$i++) {
1220: $qresult.="$hash{$queries[$i]}&";
1221: }
1222: if (untie(%hash)) {
1223: $qresult=~s/\&$//;
1224: if ($cipher) {
1225: my $cmdlength=length($qresult);
1226: $qresult.=" ";
1227: my $encqresult='';
1228: for
1229: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1230: $encqresult.=
1231: unpack("H16",
1232: $cipher->encrypt(substr($qresult,$encidx,8)));
1233: }
1234: print $client "enc:$cmdlength:$encqresult\n";
1235: } else {
1236: print $client "error:no_key\n";
1237: }
1238: } else {
1239: print $client "error: ".($!+0)
1240: ." untie(GDBM) Failed ".
1241: "while attempting eget\n";
1242: }
1243: } else {
1244: print $client "error: ".($!+0)
1245: ." tie(GDBM) Failed ".
1246: "while attempting eget\n";
1247: }
1248: # ------------------------------------------------------------------------- del
1249: } elsif ($userinput =~ /^del/) {
1250: my ($cmd,$udom,$uname,$namespace,$what)
1251: =split(/:/,$userinput);
1252: $namespace=~s/\//\_/g;
1253: $namespace=~s/\W//g;
1254: chomp($what);
1255: my $proname=propath($udom,$uname);
1256: my $now=time;
1257: unless ($namespace=~/^nohist\_/) {
1258: my $hfh;
1259: if (
1260: $hfh=IO::File->new(">>$proname/$namespace.hist")
1261: ) { print $hfh "D:$now:$what\n"; }
1262: }
1263: my @keys=split(/\&/,$what);
1264: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1265: foreach $key (@keys) {
1266: delete($hash{$key});
1267: }
1268: if (untie(%hash)) {
1269: print $client "ok\n";
1270: } else {
1271: print $client "error: ".($!+0)
1272: ." untie(GDBM) Failed ".
1273: "while attempting del\n";
1274: }
1275: } else {
1276: print $client "error: ".($!+0)
1277: ." tie(GDBM) Failed ".
1278: "while attempting del\n";
1279: }
1280: # ------------------------------------------------------------------------ keys
1281: } elsif ($userinput =~ /^keys/) {
1282: my ($cmd,$udom,$uname,$namespace)
1283: =split(/:/,$userinput);
1284: $namespace=~s/\//\_/g;
1285: $namespace=~s/\W//g;
1286: my $proname=propath($udom,$uname);
1287: my $qresult='';
1288: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1289: foreach $key (keys %hash) {
1290: $qresult.="$key&";
1291: }
1292: if (untie(%hash)) {
1293: $qresult=~s/\&$//;
1294: print $client "$qresult\n";
1295: } else {
1296: print $client "error: ".($!+0)
1297: ." untie(GDBM) Failed ".
1298: "while attempting keys\n";
1299: }
1300: } else {
1301: print $client "error: ".($!+0)
1302: ." tie(GDBM) Failed ".
1303: "while attempting keys\n";
1304: }
1305: # ----------------------------------------------------------------- dumpcurrent
1306: } elsif ($userinput =~ /^currentdump/) {
1307: my ($cmd,$udom,$uname,$namespace)
1308: =split(/:/,$userinput);
1309: $namespace=~s/\//\_/g;
1310: $namespace=~s/\W//g;
1311: my $qresult='';
1312: my $proname=propath($udom,$uname);
1313: if (tie(%hash,'GDBM_File',
1314: "$proname/$namespace.db",
1315: &GDBM_READER(),0640)) {
1316: # Structure of %data:
1317: # $data{$symb}->{$parameter}=$value;
1318: # $data{$symb}->{'v.'.$parameter}=$version;
1319: # since $parameter will be unescaped, we do not
1320: # have to worry about silly parameter names...
1321: my %data = ();
1322: while (my ($key,$value) = each(%hash)) {
1323: my ($v,$symb,$param) = split(/:/,$key);
1324: next if ($v eq 'version' || $symb eq 'keys');
1325: next if (exists($data{$symb}) &&
1326: exists($data{$symb}->{$param}) &&
1327: $data{$symb}->{'v.'.$param} > $v);
1328: $data{$symb}->{$param}=$value;
1329: $data{$symb}->{'v.'.$param}=$v;
1330: }
1331: if (untie(%hash)) {
1332: while (my ($symb,$param_hash) = each(%data)) {
1333: while(my ($param,$value) = each (%$param_hash)){
1334: next if ($param =~ /^v\./);
1335: $qresult.=$symb.':'.$param.'='.$value.'&';
1336: }
1337: }
1338: chop($qresult);
1339: print $client "$qresult\n";
1340: } else {
1341: print $client "error: ".($!+0)
1342: ." untie(GDBM) Failed ".
1343: "while attempting currentdump\n";
1344: }
1345: } else {
1346: print $client "error: ".($!+0)
1347: ." tie(GDBM) Failed ".
1348: "while attempting currentdump\n";
1349: }
1350: # ------------------------------------------------------------------------ dump
1351: } elsif ($userinput =~ /^dump/) {
1352: my ($cmd,$udom,$uname,$namespace,$regexp)
1353: =split(/:/,$userinput);
1354: $namespace=~s/\//\_/g;
1355: $namespace=~s/\W//g;
1356: if (defined($regexp)) {
1357: $regexp=&unescape($regexp);
1358: } else {
1359: $regexp='.';
1360: }
1361: my $qresult='';
1362: my $proname=propath($udom,$uname);
1363: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1364: study($regexp);
1365: while (($key,$value) = each(%hash)) {
1366: if ($regexp eq '.') {
1367: $qresult.=$key.'='.$value.'&';
1368: } else {
1369: my $unescapeKey = &unescape($key);
1370: if (eval('$unescapeKey=~/$regexp/')) {
1371: $qresult.="$key=$value&";
1372: }
1373: }
1374: }
1375: if (untie(%hash)) {
1376: chop($qresult);
1377: print $client "$qresult\n";
1378: } else {
1379: print $client "error: ".($!+0)
1380: ." untie(GDBM) Failed ".
1381: "while attempting dump\n";
1382: }
1383: } else {
1384: print $client "error: ".($!+0)
1385: ." tie(GDBM) Failed ".
1386: "while attempting dump\n";
1387: }
1388: # ----------------------------------------------------------------------- store
1389: } elsif ($userinput =~ /^store/) {
1390: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1391: =split(/:/,$userinput);
1392: $namespace=~s/\//\_/g;
1393: $namespace=~s/\W//g;
1394: if ($namespace ne 'roles') {
1395: chomp($what);
1396: my $proname=propath($udom,$uname);
1397: my $now=time;
1398: unless ($namespace=~/^nohist\_/) {
1399: my $hfh;
1400: if (
1401: $hfh=IO::File->new(">>$proname/$namespace.hist")
1402: ) { print $hfh "P:$now:$rid:$what\n"; }
1403: }
1404: my @pairs=split(/\&/,$what);
1405:
1406: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1407: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1408: my $key;
1409: $hash{"version:$rid"}++;
1410: my $version=$hash{"version:$rid"};
1411: my $allkeys='';
1412: foreach $pair (@pairs) {
1413: ($key,$value)=split(/=/,$pair);
1414: $allkeys.=$key.':';
1415: $hash{"$version:$rid:$key"}=$value;
1416: }
1417: $hash{"$version:$rid:timestamp"}=$now;
1418: $allkeys.='timestamp';
1419: $hash{"$version:keys:$rid"}=$allkeys;
1420: if (untie(%hash)) {
1421: print $client "ok\n";
1422: } else {
1423: print $client "error: ".($!+0)
1424: ." untie(GDBM) Failed ".
1425: "while attempting store\n";
1426: }
1427: } else {
1428: print $client "error: ".($!+0)
1429: ." tie(GDBM) Failed ".
1430: "while attempting store\n";
1431: }
1432: } else {
1433: print $client "refused\n";
1434: }
1435: # --------------------------------------------------------------------- restore
1436: } elsif ($userinput =~ /^restore/) {
1437: my ($cmd,$udom,$uname,$namespace,$rid)
1438: =split(/:/,$userinput);
1439: $namespace=~s/\//\_/g;
1440: $namespace=~s/\W//g;
1441: chomp($rid);
1442: my $proname=propath($udom,$uname);
1443: my $qresult='';
1444: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1445: my $version=$hash{"version:$rid"};
1446: $qresult.="version=$version&";
1447: my $scope;
1448: for ($scope=1;$scope<=$version;$scope++) {
1449: my $vkeys=$hash{"$scope:keys:$rid"};
1450: my @keys=split(/:/,$vkeys);
1451: my $key;
1452: $qresult.="$scope:keys=$vkeys&";
1453: foreach $key (@keys) {
1454: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1455: }
1456: }
1457: if (untie(%hash)) {
1458: $qresult=~s/\&$//;
1459: print $client "$qresult\n";
1460: } else {
1461: print $client "error: ".($!+0)
1462: ." untie(GDBM) Failed ".
1463: "while attempting restore\n";
1464: }
1465: } else {
1466: print $client "error: ".($!+0)
1467: ." tie(GDBM) Failed ".
1468: "while attempting restore\n";
1469: }
1470: # -------------------------------------------------------------------- chatsend
1471: } elsif ($userinput =~ /^chatsend/) {
1472: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1473: &chatadd($cdom,$cnum,$newpost);
1474: print $client "ok\n";
1475: # -------------------------------------------------------------------- chatretr
1476: } elsif ($userinput =~ /^chatretr/) {
1477: my
1478: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
1479: my $reply='';
1480: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
1481: $reply.=&escape($_).':';
1482: }
1483: $reply=~s/\:$//;
1484: print $client $reply."\n";
1485: # ------------------------------------------------------------------- querysend
1486: } elsif ($userinput =~ /^querysend/) {
1487: my ($cmd,$query,
1488: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1489: $query=~s/\n*$//g;
1490: print $client "".
1491: sqlreply("$hostid{$clientip}\&$query".
1492: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1493: # ------------------------------------------------------------------ queryreply
1494: } elsif ($userinput =~ /^queryreply/) {
1495: my ($cmd,$id,$reply)=split(/:/,$userinput);
1496: my $store;
1497: my $execdir=$perlvar{'lonDaemons'};
1498: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1499: $reply=~s/\&/\n/g;
1500: print $store $reply;
1501: close $store;
1502: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1503: print $store2 "done\n";
1504: close $store2;
1505: print $client "ok\n";
1506: }
1507: else {
1508: print $client "error: ".($!+0)
1509: ." IO::File->new Failed ".
1510: "while attempting queryreply\n";
1511: }
1512: # ----------------------------------------------------------------- courseidput
1513: } elsif ($userinput =~ /^courseidput/) {
1514: my ($cmd,$udom,$what)=split(/:/,$userinput);
1515: chomp($what);
1516: $udom=~s/\W//g;
1517: my $proname=
1518: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1519: my $now=time;
1520: my @pairs=split(/\&/,$what);
1521: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1522: foreach $pair (@pairs) {
1523: ($key,$value)=split(/=/,$pair);
1524: $hash{$key}=$value.':'.$now;
1525: }
1526: if (untie(%hash)) {
1527: print $client "ok\n";
1528: } else {
1529: print $client "error: ".($!+0)
1530: ." untie(GDBM) Failed ".
1531: "while attempting courseidput\n";
1532: }
1533: } else {
1534: print $client "error: ".($!+0)
1535: ." tie(GDBM) Failed ".
1536: "while attempting courseidput\n";
1537: }
1538: # ---------------------------------------------------------------- courseiddump
1539: } elsif ($userinput =~ /^courseiddump/) {
1540: my ($cmd,$udom,$since,$description)
1541: =split(/:/,$userinput);
1542: if (defined($description)) {
1543: $description=&unescape($description);
1544: } else {
1545: $description='.';
1546: }
1547: unless (defined($since)) { $since=0; }
1548: my $qresult='';
1549: my $proname=
1550: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1551: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1552: while (($key,$value) = each(%hash)) {
1553: my ($descr,$lasttime)=split(/\:/,$value);
1554: if ($lasttime<$since) { next; }
1555: if ($regexp eq '.') {
1556: $qresult.=$key.'='.$descr.'&';
1557: } else {
1558: my $unescapeVal = &unescape($descr);
1559: if (eval('$unescapeVal=~/$description/i')) {
1560: $qresult.="$key=$descr&";
1561: }
1562: }
1563: }
1564: if (untie(%hash)) {
1565: chop($qresult);
1566: print $client "$qresult\n";
1567: } else {
1568: print $client "error: ".($!+0)
1569: ." untie(GDBM) Failed ".
1570: "while attempting courseiddump\n";
1571: }
1572: } else {
1573: print $client "error: ".($!+0)
1574: ." tie(GDBM) Failed ".
1575: "while attempting courseiddump\n";
1576: }
1577: # ----------------------------------------------------------------------- idput
1578: } elsif ($userinput =~ /^idput/) {
1579: my ($cmd,$udom,$what)=split(/:/,$userinput);
1580: chomp($what);
1581: $udom=~s/\W//g;
1582: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1583: my $now=time;
1584: {
1585: my $hfh;
1586: if (
1587: $hfh=IO::File->new(">>$proname.hist")
1588: ) { print $hfh "P:$now:$what\n"; }
1589: }
1590: my @pairs=split(/\&/,$what);
1591: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1592: foreach $pair (@pairs) {
1593: ($key,$value)=split(/=/,$pair);
1594: $hash{$key}=$value;
1595: }
1596: if (untie(%hash)) {
1597: print $client "ok\n";
1598: } else {
1599: print $client "error: ".($!+0)
1600: ." untie(GDBM) Failed ".
1601: "while attempting idput\n";
1602: }
1603: } else {
1604: print $client "error: ".($!+0)
1605: ." tie(GDBM) Failed ".
1606: "while attempting idput\n";
1607: }
1608: # ----------------------------------------------------------------------- idget
1609: } elsif ($userinput =~ /^idget/) {
1610: my ($cmd,$udom,$what)=split(/:/,$userinput);
1611: chomp($what);
1612: $udom=~s/\W//g;
1613: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1614: my @queries=split(/\&/,$what);
1615: my $qresult='';
1616: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1617: for ($i=0;$i<=$#queries;$i++) {
1618: $qresult.="$hash{$queries[$i]}&";
1619: }
1620: if (untie(%hash)) {
1621: $qresult=~s/\&$//;
1622: print $client "$qresult\n";
1623: } else {
1624: print $client "error: ".($!+0)
1625: ." untie(GDBM) Failed ".
1626: "while attempting idget\n";
1627: }
1628: } else {
1629: print $client "error: ".($!+0)
1630: ." tie(GDBM) Failed ".
1631: "while attempting idget\n";
1632: }
1633: # ---------------------------------------------------------------------- tmpput
1634: } elsif ($userinput =~ /^tmpput/) {
1635: my ($cmd,$what)=split(/:/,$userinput);
1636: my $store;
1637: $tmpsnum++;
1638: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1639: $id=~s/\W/\_/g;
1640: $what=~s/\n//g;
1641: my $execdir=$perlvar{'lonDaemons'};
1642: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1643: print $store $what;
1644: close $store;
1645: print $client "$id\n";
1646: }
1647: else {
1648: print $client "error: ".($!+0)
1649: ."IO::File->new Failed ".
1650: "while attempting tmpput\n";
1651: }
1652:
1653: # ---------------------------------------------------------------------- tmpget
1654: } elsif ($userinput =~ /^tmpget/) {
1655: my ($cmd,$id)=split(/:/,$userinput);
1656: chomp($id);
1657: $id=~s/\W/\_/g;
1658: my $store;
1659: my $execdir=$perlvar{'lonDaemons'};
1660: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1661: my $reply=<$store>;
1662: print $client "$reply\n";
1663: close $store;
1664: }
1665: else {
1666: print $client "error: ".($!+0)
1667: ."IO::File->new Failed ".
1668: "while attempting tmpget\n";
1669: }
1670:
1671: # ---------------------------------------------------------------------- tmpdel
1672: } elsif ($userinput =~ /^tmpdel/) {
1673: my ($cmd,$id)=split(/:/,$userinput);
1674: chomp($id);
1675: $id=~s/\W/\_/g;
1676: my $execdir=$perlvar{'lonDaemons'};
1677: if (unlink("$execdir/tmp/$id.tmp")) {
1678: print $client "ok\n";
1679: } else {
1680: print $client "error: ".($!+0)
1681: ."Unlink tmp Failed ".
1682: "while attempting tmpdel\n";
1683: }
1684: # -------------------------------------------------------------------------- ls
1685: } elsif ($userinput =~ /^ls/) {
1686: my ($cmd,$ulsdir)=split(/:/,$userinput);
1687: my $ulsout='';
1688: my $ulsfn;
1689: if (-e $ulsdir) {
1690: if(-d $ulsdir) {
1691: if (opendir(LSDIR,$ulsdir)) {
1692: while ($ulsfn=readdir(LSDIR)) {
1693: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1694: $ulsout.=$ulsfn.'&'.
1695: join('&',@ulsstats).':';
1696: }
1697: closedir(LSDIR);
1698: }
1699: } else {
1700: my @ulsstats=stat($ulsdir);
1701: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1702: }
1703: } else {
1704: $ulsout='no_such_dir';
1705: }
1706: if ($ulsout eq '') { $ulsout='empty'; }
1707: print $client "$ulsout\n";
1708: # ------------------------------------------------------------------ Hanging up
1709: } elsif (($userinput =~ /^exit/) ||
1710: ($userinput =~ /^init/)) {
1711: &logthis(
1712: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1713: print $client "bye\n";
1714: $client->close();
1715: last;
1716: # ------------------------------------------------------------- unknown command
1717: } elsif ($userinput =~ /^sethost:/) {
1718: print $client &sethost($userinput)."\n";
1719: } elsif ($userinput =~/^version:/) {
1720: print $client &version($userinput)."\n";
1721: } else {
1722: # unknown command
1723: print $client "unknown_cmd\n";
1724: }
1725: # -------------------------------------------------------------------- complete
1726: alarm(0);
1727: &status('Listening to '.$hostid{$clientip});
1728: }
1729: # --------------------------------------------- client unknown or fishy, refuse
1730: } else {
1731: print $client "refused\n";
1732: $client->close();
1733: &logthis("<font color=blue>WARNING: "
1734: ."Rejected client $clientip, closing connection</font>");
1735: }
1736: }
1737:
1738: # =============================================================================
1739:
1740: &logthis("<font color=red>CRITICAL: "
1741: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1742:
1743:
1744: # this exit is VERY important, otherwise the child will become
1745: # a producer of more and more children, forking yourself into
1746: # process death.
1747: exit;
1748:
1749: }
1750:
1751:
1752: #
1753: # Checks to see if the input roleput request was to set
1754: # an author role. If so, invokes the lchtmldir script to set
1755: # up a correct public_html
1756: # Parameters:
1757: # request - The request sent to the rolesput subchunk.
1758: # We're looking for /domain/_au
1759: # domain - The domain in which the user is having roles doctored.
1760: # user - Name of the user for which the role is being put.
1761: # authtype - The authentication type associated with the user.
1762: #
1763: sub ManagePermissions
1764: {
1765: my $request = shift;
1766: my $domain = shift;
1767: my $user = shift;
1768: my $authtype= shift;
1769:
1770: # See if the request is of the form /$domain/_au
1771:
1772: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1773: my $execdir = $perlvar{'lonDaemons'};
1774: my $userhome= "/home/$user" ;
1775: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1776: system("$execdir/lchtmldir $userhome $user $authtype");
1777: }
1778: }
1779: #
1780: # GetAuthType - Determines the authorization type of a user in a domain.
1781:
1782: # Returns the authorization type or nouser if there is no such user.
1783: #
1784: sub GetAuthType
1785: {
1786: my $domain = shift;
1787: my $user = shift;
1788:
1789: Debug("GetAuthType( $domain, $user ) \n");
1790: my $proname = &propath($domain, $user);
1791: my $passwdfile = "$proname/passwd";
1792: if( -e $passwdfile ) {
1793: my $pf = IO::File->new($passwdfile);
1794: my $realpassword = <$pf>;
1795: chomp($realpassword);
1796: Debug("Password info = $realpassword\n");
1797: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1798: Debug("Authtype = $authtype, content = $contentpwd\n");
1799: my $availinfo = '';
1800: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1801: $availinfo = $contentpwd;
1802: }
1803:
1804: return "$authtype:$availinfo";
1805: }
1806: else {
1807: Debug("Returning nouser");
1808: return "nouser";
1809: }
1810: }
1811:
1812: sub addline {
1813: my ($fname,$hostid,$ip,$newline)=@_;
1814: my $contents;
1815: my $found=0;
1816: my $expr='^'.$hostid.':'.$ip.':';
1817: $expr =~ s/\./\\\./g;
1818: if ($sh=IO::File->new("$fname.subscription")) {
1819: while (my $subline=<$sh>) {
1820: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1821: }
1822: $sh->close();
1823: }
1824: $sh=IO::File->new(">$fname.subscription");
1825: if ($contents) { print $sh $contents; }
1826: if ($newline) { print $sh $newline; }
1827: $sh->close();
1828: return $found;
1829: }
1830:
1831: sub getchat {
1832: my ($cdom,$cname,$udom,$uname)=@_;
1833: my %hash;
1834: my $proname=&propath($cdom,$cname);
1835: my @entries=();
1836: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1837: &GDBM_READER(),0640)) {
1838: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1839: untie %hash;
1840: }
1841: my @participants=();
1842: $cutoff=time-60;
1843: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1844: &GDBM_WRCREAT(),0640)) {
1845: $hash{$uname.':'.$udom}=time;
1846: foreach (sort keys %hash) {
1847: if ($hash{$_}>$cutoff) {
1848: $participants[$#participants+1]='active_participant:'.$_;
1849: }
1850: }
1851: untie %hash;
1852: }
1853: return (@participants,@entries);
1854: }
1855:
1856: sub chatadd {
1857: my ($cdom,$cname,$newchat)=@_;
1858: my %hash;
1859: my $proname=&propath($cdom,$cname);
1860: my @entries=();
1861: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1862: &GDBM_WRCREAT(),0640)) {
1863: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1864: my $time=time;
1865: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1866: my ($thentime,$idnum)=split(/\_/,$lastid);
1867: my $newid=$time.'_000000';
1868: if ($thentime==$time) {
1869: $idnum=~s/^0+//;
1870: $idnum++;
1871: $idnum=substr('000000'.$idnum,-6,6);
1872: $newid=$time.'_'.$idnum;
1873: }
1874: $hash{$newid}=$newchat;
1875: my $expired=$time-3600;
1876: foreach (keys %hash) {
1877: my ($thistime)=($_=~/(\d+)\_/);
1878: if ($thistime<$expired) {
1879: delete $hash{$_};
1880: }
1881: }
1882: untie %hash;
1883: }
1884: }
1885:
1886: sub unsub {
1887: my ($fname,$clientip)=@_;
1888: my $result;
1889: if (unlink("$fname.$hostid{$clientip}")) {
1890: $result="ok\n";
1891: } else {
1892: $result="not_subscribed\n";
1893: }
1894: if (-e "$fname.subscription") {
1895: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1896: if ($found) { $result="ok\n"; }
1897: } else {
1898: if ($result != "ok\n") { $result="not_subscribed\n"; }
1899: }
1900: return $result;
1901: }
1902:
1903: sub currentversion {
1904: my $fname=shift;
1905: my $version=-1;
1906: my $ulsdir='';
1907: if ($fname=~/^(.+)\/[^\/]+$/) {
1908: $ulsdir=$1;
1909: }
1910: my ($fnamere1,$fnamere2);
1911: # remove version if already specified
1912: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1913: # get the bits that go before and after the version number
1914: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
1915: $fnamere1=$1;
1916: $fnamere2='.'.$2;
1917: }
1918: if (-e $fname) { $version=1; }
1919: if (-e $ulsdir) {
1920: if(-d $ulsdir) {
1921: if (opendir(LSDIR,$ulsdir)) {
1922:
1923: while ($ulsfn=readdir(LSDIR)) {
1924: # see if this is a regular file (ignore links produced earlier)
1925: my $thisfile=$ulsdir.'/'.$ulsfn;
1926: unless (-l $thisfile) {
1927: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
1928: if ($1>$version) { $version=$1; }
1929: }
1930: }
1931: }
1932: closedir(LSDIR);
1933: $version++;
1934: }
1935: }
1936: }
1937: return $version;
1938: }
1939:
1940: sub thisversion {
1941: my $fname=shift;
1942: my $version=-1;
1943: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1944: $version=$1;
1945: }
1946: return $version;
1947: }
1948:
1949: sub subscribe {
1950: my ($userinput,$clientip)=@_;
1951: my $result;
1952: my ($cmd,$fname)=split(/:/,$userinput);
1953: my $ownership=&ishome($fname);
1954: if ($ownership eq 'owner') {
1955: # explitly asking for the current version?
1956: unless (-e $fname) {
1957: my $currentversion=¤tversion($fname);
1958: if (&thisversion($fname)==$currentversion) {
1959: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1960: my $root=$1;
1961: my $extension=$2;
1962: symlink($root.'.'.$extension,
1963: $root.'.'.$currentversion.'.'.$extension);
1964: unless ($extension=~/\.meta$/) {
1965: symlink($root.'.'.$extension.'.meta',
1966: $root.'.'.$currentversion.'.'.$extension.'.meta');
1967: }
1968: }
1969: }
1970: }
1971: if (-e $fname) {
1972: if (-d $fname) {
1973: $result="directory\n";
1974: } else {
1975: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1976: $now=time;
1977: my $found=&addline($fname,$hostid{$clientip},$clientip,
1978: "$hostid{$clientip}:$clientip:$now\n");
1979: if ($found) { $result="$fname\n"; }
1980: # if they were subscribed to only meta data, delete that
1981: # subscription, when you subscribe to a file you also get
1982: # the metadata
1983: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1984: $fname=~s/\/home\/httpd\/html\/res/raw/;
1985: $fname="http://$thisserver/".$fname;
1986: $result="$fname\n";
1987: }
1988: } else {
1989: $result="not_found\n";
1990: }
1991: } else {
1992: $result="rejected\n";
1993: }
1994: return $result;
1995: }
1996:
1997: sub make_passwd_file {
1998: my ($uname, $umode,$npass,$passfilename)=@_;
1999: my $result="ok\n";
2000: if ($umode eq 'krb4' or $umode eq 'krb5') {
2001: {
2002: my $pf = IO::File->new(">$passfilename");
2003: print $pf "$umode:$npass\n";
2004: }
2005: } elsif ($umode eq 'internal') {
2006: my $salt=time;
2007: $salt=substr($salt,6,2);
2008: my $ncpass=crypt($npass,$salt);
2009: {
2010: &Debug("Creating internal auth");
2011: my $pf = IO::File->new(">$passfilename");
2012: print $pf "internal:$ncpass\n";
2013: }
2014: } elsif ($umode eq 'localauth') {
2015: {
2016: my $pf = IO::File->new(">$passfilename");
2017: print $pf "localauth:$npass\n";
2018: }
2019: } elsif ($umode eq 'unix') {
2020: {
2021: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
2022: {
2023: &Debug("Executing external: ".$execpath);
2024: &Debug("user = ".$uname.", Password =". $npass);
2025: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
2026: print $se "$uname\n";
2027: print $se "$npass\n";
2028: print $se "$npass\n";
2029: }
2030: my $useraddok = $?;
2031: if($useraddok > 0) {
2032: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
2033: }
2034: my $pf = IO::File->new(">$passfilename");
2035: print $pf "unix:\n";
2036: }
2037: } elsif ($umode eq 'none') {
2038: {
2039: my $pf = IO::File->new(">$passfilename");
2040: print $pf "none:\n";
2041: }
2042: } else {
2043: $result="auth_mode_error\n";
2044: }
2045: return $result;
2046: }
2047:
2048: sub sethost {
2049: my ($remotereq) = @_;
2050: my (undef,$hostid)=split(/:/,$remotereq);
2051: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
2052: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
2053: $currenthostid=$hostid;
2054: $currentdomainid=$hostdom{$hostid};
2055: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
2056: } else {
2057: &logthis("Requested host id $hostid not an alias of ".
2058: $perlvar{'lonHostID'}." refusing connection");
2059: return 'unable_to_set';
2060: }
2061: return 'ok';
2062: }
2063:
2064: sub version {
2065: my ($userinput)=@_;
2066: $remoteVERSION=(split(/:/,$userinput))[1];
2067: return "version:$VERSION";
2068: }
2069:
2070: # ----------------------------------- POD (plain old documentation, CPAN style)
2071:
2072: =head1 NAME
2073:
2074: lond - "LON Daemon" Server (port "LOND" 5663)
2075:
2076: =head1 SYNOPSIS
2077:
2078: Usage: B<lond>
2079:
2080: Should only be run as user=www. This is a command-line script which
2081: is invoked by B<loncron>. There is no expectation that a typical user
2082: will manually start B<lond> from the command-line. (In other words,
2083: DO NOT START B<lond> YOURSELF.)
2084:
2085: =head1 DESCRIPTION
2086:
2087: There are two characteristics associated with the running of B<lond>,
2088: PROCESS MANAGEMENT (starting, stopping, handling child processes)
2089: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
2090: subscriptions, etc). These are described in two large
2091: sections below.
2092:
2093: B<PROCESS MANAGEMENT>
2094:
2095: Preforker - server who forks first. Runs as a daemon. HUPs.
2096: Uses IDEA encryption
2097:
2098: B<lond> forks off children processes that correspond to the other servers
2099: in the network. Management of these processes can be done at the
2100: parent process level or the child process level.
2101:
2102: B<logs/lond.log> is the location of log messages.
2103:
2104: The process management is now explained in terms of linux shell commands,
2105: subroutines internal to this code, and signal assignments:
2106:
2107: =over 4
2108:
2109: =item *
2110:
2111: PID is stored in B<logs/lond.pid>
2112:
2113: This is the process id number of the parent B<lond> process.
2114:
2115: =item *
2116:
2117: SIGTERM and SIGINT
2118:
2119: Parent signal assignment:
2120: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
2121:
2122: Child signal assignment:
2123: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
2124: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
2125: to restart a new child.)
2126:
2127: Command-line invocations:
2128: B<kill> B<-s> SIGTERM I<PID>
2129: B<kill> B<-s> SIGINT I<PID>
2130:
2131: Subroutine B<HUNTSMAN>:
2132: This is only invoked for the B<lond> parent I<PID>.
2133: This kills all the children, and then the parent.
2134: The B<lonc.pid> file is cleared.
2135:
2136: =item *
2137:
2138: SIGHUP
2139:
2140: Current bug:
2141: This signal can only be processed the first time
2142: on the parent process. Subsequent SIGHUP signals
2143: have no effect.
2144:
2145: Parent signal assignment:
2146: $SIG{HUP} = \&HUPSMAN;
2147:
2148: Child signal assignment:
2149: none (nothing happens)
2150:
2151: Command-line invocations:
2152: B<kill> B<-s> SIGHUP I<PID>
2153:
2154: Subroutine B<HUPSMAN>:
2155: This is only invoked for the B<lond> parent I<PID>,
2156: This kills all the children, and then the parent.
2157: The B<lond.pid> file is cleared.
2158:
2159: =item *
2160:
2161: SIGUSR1
2162:
2163: Parent signal assignment:
2164: $SIG{USR1} = \&USRMAN;
2165:
2166: Child signal assignment:
2167: $SIG{USR1}= \&logstatus;
2168:
2169: Command-line invocations:
2170: B<kill> B<-s> SIGUSR1 I<PID>
2171:
2172: Subroutine B<USRMAN>:
2173: When invoked for the B<lond> parent I<PID>,
2174: SIGUSR1 is sent to all the children, and the status of
2175: each connection is logged.
2176:
2177: =item *
2178:
2179: SIGCHLD
2180:
2181: Parent signal assignment:
2182: $SIG{CHLD} = \&REAPER;
2183:
2184: Child signal assignment:
2185: none
2186:
2187: Command-line invocations:
2188: B<kill> B<-s> SIGCHLD I<PID>
2189:
2190: Subroutine B<REAPER>:
2191: This is only invoked for the B<lond> parent I<PID>.
2192: Information pertaining to the child is removed.
2193: The socket port is cleaned up.
2194:
2195: =back
2196:
2197: B<SERVER-SIDE ACTIVITIES>
2198:
2199: Server-side information can be accepted in an encrypted or non-encrypted
2200: method.
2201:
2202: =over 4
2203:
2204: =item ping
2205:
2206: Query a client in the hosts.tab table; "Are you there?"
2207:
2208: =item pong
2209:
2210: Respond to a ping query.
2211:
2212: =item ekey
2213:
2214: Read in encrypted key, make cipher. Respond with a buildkey.
2215:
2216: =item load
2217:
2218: Respond with CPU load based on a computation upon /proc/loadavg.
2219:
2220: =item currentauth
2221:
2222: Reply with current authentication information (only over an
2223: encrypted channel).
2224:
2225: =item auth
2226:
2227: Only over an encrypted channel, reply as to whether a user's
2228: authentication information can be validated.
2229:
2230: =item passwd
2231:
2232: Allow for a password to be set.
2233:
2234: =item makeuser
2235:
2236: Make a user.
2237:
2238: =item passwd
2239:
2240: Allow for authentication mechanism and password to be changed.
2241:
2242: =item home
2243:
2244: Respond to a question "are you the home for a given user?"
2245:
2246: =item update
2247:
2248: Update contents of a subscribed resource.
2249:
2250: =item unsubscribe
2251:
2252: The server is unsubscribing from a resource.
2253:
2254: =item subscribe
2255:
2256: The server is subscribing to a resource.
2257:
2258: =item log
2259:
2260: Place in B<logs/lond.log>
2261:
2262: =item put
2263:
2264: stores hash in namespace
2265:
2266: =item rolesput
2267:
2268: put a role into a user's environment
2269:
2270: =item get
2271:
2272: returns hash with keys from array
2273: reference filled in from namespace
2274:
2275: =item eget
2276:
2277: returns hash with keys from array
2278: reference filled in from namesp (encrypts the return communication)
2279:
2280: =item rolesget
2281:
2282: get a role from a user's environment
2283:
2284: =item del
2285:
2286: deletes keys out of array from namespace
2287:
2288: =item keys
2289:
2290: returns namespace keys
2291:
2292: =item dump
2293:
2294: dumps the complete (or key matching regexp) namespace into a hash
2295:
2296: =item store
2297:
2298: stores hash permanently
2299: for this url; hashref needs to be given and should be a \%hashname; the
2300: remaining args aren't required and if they aren't passed or are '' they will
2301: be derived from the ENV
2302:
2303: =item restore
2304:
2305: returns a hash for a given url
2306:
2307: =item querysend
2308:
2309: Tells client about the lonsql process that has been launched in response
2310: to a sent query.
2311:
2312: =item queryreply
2313:
2314: Accept information from lonsql and make appropriate storage in temporary
2315: file space.
2316:
2317: =item idput
2318:
2319: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2320: for each student, defined perhaps by the institutional Registrar.)
2321:
2322: =item idget
2323:
2324: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2325: for each student, defined perhaps by the institutional Registrar.)
2326:
2327: =item tmpput
2328:
2329: Accept and store information in temporary space.
2330:
2331: =item tmpget
2332:
2333: Send along temporarily stored information.
2334:
2335: =item ls
2336:
2337: List part of a user's directory.
2338:
2339: =item Hanging up (exit or init)
2340:
2341: What to do when a client tells the server that they (the client)
2342: are leaving the network.
2343:
2344: =item unknown command
2345:
2346: If B<lond> is sent an unknown command (not in the list above),
2347: it replys to the client "unknown_cmd".
2348:
2349: =item UNKNOWN CLIENT
2350:
2351: If the anti-spoofing algorithm cannot verify the client,
2352: the client is rejected (with a "refused" message sent
2353: to the client, and the connection is closed.
2354:
2355: =back
2356:
2357: =head1 PREREQUISITES
2358:
2359: IO::Socket
2360: IO::File
2361: Apache::File
2362: Symbol
2363: POSIX
2364: Crypt::IDEA
2365: LWP::UserAgent()
2366: GDBM_File
2367: Authen::Krb4
2368: Authen::Krb5
2369:
2370: =head1 COREQUISITES
2371:
2372: =head1 OSNAMES
2373:
2374: linux
2375:
2376: =head1 SCRIPT CATEGORIES
2377:
2378: Server/Process
2379:
2380: =cut
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