1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.132.2.3 2003/10/08 20:39:42 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: 1.132.2.3 $'; #' 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($$.' is dead');
268: }
269: }
270: sleep 5;
271: $SIG{ALRM} = sub { die "timeout" };
272: $SIG{__DIE__} = 'DEFAULT';
273: foreach (sort keys %children) {
274: unless (-e "$docdir/lon-status/londchld/$_.txt") {
275: eval {
276: alarm(300);
277: &logthis('Child '.$_.' did not respond');
278: kill 9 => $_;
279: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
280: #$subj="LON: $currenthostid killed lond process $_";
281: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
282: #$execdir=$perlvar{'lonDaemons'};
283: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
284: alarm(0);
285: }
286: }
287: }
288: $SIG{ALRM} = 'DEFAULT';
289: $SIG{__DIE__} = \&catchexception;
290: }
291:
292: # --------------------------------------------------------------------- Logging
293:
294: sub logthis {
295: my $message=shift;
296: my $execdir=$perlvar{'lonDaemons'};
297: my $fh=IO::File->new(">>$execdir/logs/lond.log");
298: my $now=time;
299: my $local=localtime($now);
300: $lastlog=$local.': '.$message;
301: print $fh "$local ($$): $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: # -------------------------------------------------------------------- userload
671: } elsif ($userinput =~ /^userload/) {
672: my $userloadpercent=&userload();
673: print $client "$userloadpercent\n";
674: # ----------------------------------------------------------------- currentauth
675: } elsif ($userinput =~ /^currentauth/) {
676: if ($wasenc==1) {
677: my ($cmd,$udom,$uname)=split(/:/,$userinput);
678: my $result = GetAuthType($udom, $uname);
679: if($result eq "nouser") {
680: print $client "unknown_user\n";
681: }
682: else {
683: print $client "$result\n"
684: }
685: } else {
686: print $client "refused\n";
687: }
688: # ------------------------------------------------------------------------ auth
689: } elsif ($userinput =~ /^auth/) {
690: if ($wasenc==1) {
691: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
692: chomp($upass);
693: $upass=unescape($upass);
694: my $proname=propath($udom,$uname);
695: my $passfilename="$proname/passwd";
696: if (-e $passfilename) {
697: my $pf = IO::File->new($passfilename);
698: my $realpasswd=<$pf>;
699: chomp($realpasswd);
700: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
701: my $pwdcorrect=0;
702: if ($howpwd eq 'internal') {
703: &Debug("Internal auth");
704: $pwdcorrect=
705: (crypt($upass,$contentpwd) eq $contentpwd);
706: } elsif ($howpwd eq 'unix') {
707: &Debug("Unix auth");
708: if((getpwnam($uname))[1] eq "") { #no such user!
709: $pwdcorrect = 0;
710: } else {
711: $contentpwd=(getpwnam($uname))[1];
712: my $pwauth_path="/usr/local/sbin/pwauth";
713: unless ($contentpwd eq 'x') {
714: $pwdcorrect=
715: (crypt($upass,$contentpwd) eq
716: $contentpwd);
717: }
718:
719: elsif (-e $pwauth_path) {
720: open PWAUTH, "|$pwauth_path" or
721: die "Cannot invoke authentication";
722: print PWAUTH "$uname\n$upass\n";
723: close PWAUTH;
724: $pwdcorrect=!$?;
725: }
726: }
727: } elsif ($howpwd eq 'krb4') {
728: $null=pack("C",0);
729: unless ($upass=~/$null/) {
730: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
731: ($uname,"",$contentpwd,'krbtgt',
732: $contentpwd,1,$upass);
733: if (!$krb4_error) {
734: $pwdcorrect = 1;
735: } else {
736: $pwdcorrect=0;
737: # log error if it is not a bad password
738: if ($krb4_error != 62) {
739: &logthis('krb4:'.$uname.','.$contentpwd.','.
740: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
741: }
742: }
743: }
744: } elsif ($howpwd eq 'krb5') {
745: $null=pack("C",0);
746: unless ($upass=~/$null/) {
747: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
748: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
749: my $krbserver=&Authen::Krb5::parse_name($krbservice);
750: my $credentials=&Authen::Krb5::cc_default();
751: $credentials->initialize($krbclient);
752: my $krbreturn =
753: &Authen::Krb5::get_in_tkt_with_password(
754: $krbclient,$krbserver,$upass,$credentials);
755: # unless ($krbreturn) {
756: # &logthis("Krb5 Error: ".
757: # &Authen::Krb5::error());
758: # }
759: $pwdcorrect = ($krbreturn == 1);
760: } else { $pwdcorrect=0; }
761: } elsif ($howpwd eq 'localauth') {
762: $pwdcorrect=&localauth::localauth($uname,$upass,
763: $contentpwd);
764: }
765: if ($pwdcorrect) {
766: print $client "authorized\n";
767: } else {
768: print $client "non_authorized\n";
769: }
770: } else {
771: print $client "unknown_user\n";
772: }
773: } else {
774: print $client "refused\n";
775: }
776: # ---------------------------------------------------------------------- passwd
777: } elsif ($userinput =~ /^passwd/) {
778: if ($wasenc==1) {
779: my
780: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
781: chomp($npass);
782: $upass=&unescape($upass);
783: $npass=&unescape($npass);
784: &Debug("Trying to change password for $uname");
785: my $proname=propath($udom,$uname);
786: my $passfilename="$proname/passwd";
787: if (-e $passfilename) {
788: my $realpasswd;
789: { my $pf = IO::File->new($passfilename);
790: $realpasswd=<$pf>; }
791: chomp($realpasswd);
792: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
793: if ($howpwd eq 'internal') {
794: &Debug("internal auth");
795: if (crypt($upass,$contentpwd) eq $contentpwd) {
796: my $salt=time;
797: $salt=substr($salt,6,2);
798: my $ncpass=crypt($npass,$salt);
799: { my $pf = IO::File->new(">$passfilename");
800: print $pf "internal:$ncpass\n"; }
801: &logthis("Result of password change for $uname: pwchange_success");
802: print $client "ok\n";
803: } else {
804: print $client "non_authorized\n";
805: }
806: } elsif ($howpwd eq 'unix') {
807: # Unix means we have to access /etc/password
808: # one way or another.
809: # First: Make sure the current password is
810: # correct
811: &Debug("auth is unix");
812: $contentpwd=(getpwnam($uname))[1];
813: my $pwdcorrect = "0";
814: my $pwauth_path="/usr/local/sbin/pwauth";
815: unless ($contentpwd eq 'x') {
816: $pwdcorrect=
817: (crypt($upass,$contentpwd) eq $contentpwd);
818: } elsif (-e $pwauth_path) {
819: open PWAUTH, "|$pwauth_path" or
820: die "Cannot invoke authentication";
821: print PWAUTH "$uname\n$upass\n";
822: close PWAUTH;
823: &Debug("exited pwauth with $? ($uname,$upass) ");
824: $pwdcorrect=($? == 0);
825: }
826: if ($pwdcorrect) {
827: my $execdir=$perlvar{'lonDaemons'};
828: &Debug("Opening lcpasswd pipeline");
829: my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
830: print $pf "$uname\n$npass\n$npass\n";
831: close $pf;
832: my $err = $?;
833: my $result = ($err>0 ? 'pwchange_failure'
834: : 'ok');
835: &logthis("Result of password change for $uname: ".
836: &lcpasswdstrerror($?));
837: print $client "$result\n";
838: } else {
839: print $client "non_authorized\n";
840: }
841: } else {
842: print $client "auth_mode_error\n";
843: }
844: } else {
845: print $client "unknown_user\n";
846: }
847: } else {
848: print $client "refused\n";
849: }
850: # -------------------------------------------------------------------- makeuser
851: } elsif ($userinput =~ /^makeuser/) {
852: &Debug("Make user received");
853: my $oldumask=umask(0077);
854: if ($wasenc==1) {
855: my
856: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
857: &Debug("cmd =".$cmd." $udom =".$udom.
858: " uname=".$uname);
859: chomp($npass);
860: $npass=&unescape($npass);
861: my $proname=propath($udom,$uname);
862: my $passfilename="$proname/passwd";
863: &Debug("Password file created will be:".
864: $passfilename);
865: if (-e $passfilename) {
866: print $client "already_exists\n";
867: } elsif ($udom ne $currentdomainid) {
868: print $client "not_right_domain\n";
869: } else {
870: @fpparts=split(/\//,$proname);
871: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
872: $fperror='';
873: for ($i=3;$i<=$#fpparts;$i++) {
874: $fpnow.='/'.$fpparts[$i];
875: unless (-e $fpnow) {
876: unless (mkdir($fpnow,0777)) {
877: $fperror="error: ".($!+0)
878: ." mkdir failed while attempting "
879: ."makeuser\n";
880: }
881: }
882: }
883: unless ($fperror) {
884: my $result=&make_passwd_file($uname, $umode,$npass,
885: $passfilename);
886: print $client $result;
887: } else {
888: print $client "$fperror\n";
889: }
890: }
891: } else {
892: print $client "refused\n";
893: }
894: umask($oldumask);
895: # -------------------------------------------------------------- changeuserauth
896: } elsif ($userinput =~ /^changeuserauth/) {
897: &Debug("Changing authorization");
898: if ($wasenc==1) {
899: my
900: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
901: chomp($npass);
902: &Debug("cmd = ".$cmd." domain= ".$udom.
903: "uname =".$uname." umode= ".$umode);
904: $npass=&unescape($npass);
905: my $proname=&propath($udom,$uname);
906: my $passfilename="$proname/passwd";
907: if ($udom ne $currentdomainid) {
908: print $client "not_right_domain\n";
909: } else {
910: my $result=&make_passwd_file($uname, $umode,$npass,
911: $passfilename);
912: print $client $result;
913: }
914: } else {
915: print $client "refused\n";
916: }
917: # ------------------------------------------------------------------------ home
918: } elsif ($userinput =~ /^home/) {
919: my ($cmd,$udom,$uname)=split(/:/,$userinput);
920: chomp($uname);
921: my $proname=propath($udom,$uname);
922: if (-e $proname) {
923: print $client "found\n";
924: } else {
925: print $client "not_found\n";
926: }
927: # ---------------------------------------------------------------------- update
928: } elsif ($userinput =~ /^update/) {
929: my ($cmd,$fname)=split(/:/,$userinput);
930: my $ownership=ishome($fname);
931: if ($ownership eq 'not_owner') {
932: if (-e $fname) {
933: my ($dev,$ino,$mode,$nlink,
934: $uid,$gid,$rdev,$size,
935: $atime,$mtime,$ctime,
936: $blksize,$blocks)=stat($fname);
937: $now=time;
938: $since=$now-$atime;
939: if ($since>$perlvar{'lonExpire'}) {
940: $reply=
941: reply("unsub:$fname","$hostid{$clientip}");
942: unlink("$fname");
943: } else {
944: my $transname="$fname.in.transfer";
945: my $remoteurl=
946: reply("sub:$fname","$hostid{$clientip}");
947: my $response;
948: {
949: my $ua=new LWP::UserAgent;
950: my $request=new HTTP::Request('GET',"$remoteurl");
951: $response=$ua->request($request,$transname);
952: }
953: if ($response->is_error()) {
954: unlink($transname);
955: my $message=$response->status_line;
956: &logthis(
957: "LWP GET: $message for $fname ($remoteurl)");
958: } else {
959: if ($remoteurl!~/\.meta$/) {
960: my $ua=new LWP::UserAgent;
961: my $mrequest=
962: new HTTP::Request('GET',$remoteurl.'.meta');
963: my $mresponse=
964: $ua->request($mrequest,$fname.'.meta');
965: if ($mresponse->is_error()) {
966: unlink($fname.'.meta');
967: }
968: }
969: rename($transname,$fname);
970: }
971: }
972: print $client "ok\n";
973: } else {
974: print $client "not_found\n";
975: }
976: } else {
977: print $client "rejected\n";
978: }
979: # -------------------------------------- fetch a user file from a remote server
980: } elsif ($userinput =~ /^fetchuserfile/) {
981: my ($cmd,$fname)=split(/:/,$userinput);
982: my ($udom,$uname,$ufile)=split(/\//,$fname);
983: my $udir=propath($udom,$uname).'/userfiles';
984: unless (-e $udir) { mkdir($udir,0770); }
985: if (-e $udir) {
986: $ufile=~s/^[\.\~]+//;
987: $ufile=~s/\///g;
988: my $transname=$udir.'/'.$ufile;
989: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
990: my $response;
991: {
992: my $ua=new LWP::UserAgent;
993: my $request=new HTTP::Request('GET',"$remoteurl");
994: $response=$ua->request($request,$transname);
995: }
996: if ($response->is_error()) {
997: unlink($transname);
998: my $message=$response->status_line;
999: &logthis(
1000: "LWP GET: $message for $fname ($remoteurl)");
1001: print $client "failed\n";
1002: } else {
1003: print $client "ok\n";
1004: }
1005: } else {
1006: print $client "not_home\n";
1007: }
1008: # ------------------------------------------ authenticate access to a user file
1009: } elsif ($userinput =~ /^tokenauthuserfile/) {
1010: my ($cmd,$fname,$session)=split(/:/,$userinput);
1011: chomp($session);
1012: $reply='non_auth';
1013: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1014: $session.'.id')) {
1015: while ($line=<ENVIN>) {
1016: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1017: }
1018: close(ENVIN);
1019: print $client $reply."\n";
1020: } else {
1021: print $client "invalid_token\n";
1022: }
1023: # ----------------------------------------------------------------- unsubscribe
1024: } elsif ($userinput =~ /^unsub/) {
1025: my ($cmd,$fname)=split(/:/,$userinput);
1026: if (-e $fname) {
1027: print $client &unsub($client,$fname,$clientip);
1028: } else {
1029: print $client "not_found\n";
1030: }
1031: # ------------------------------------------------------------------- subscribe
1032: } elsif ($userinput =~ /^sub/) {
1033: print $client &subscribe($userinput,$clientip);
1034: # ------------------------------------------------------------- current version
1035: } elsif ($userinput =~ /^currentversion/) {
1036: my ($cmd,$fname)=split(/:/,$userinput);
1037: print $client ¤tversion($fname)."\n";
1038: # ------------------------------------------------------------------------- log
1039: } elsif ($userinput =~ /^log/) {
1040: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1041: chomp($what);
1042: my $proname=propath($udom,$uname);
1043: my $now=time;
1044: {
1045: my $hfh;
1046: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1047: print $hfh "$now:$hostid{$clientip}:$what\n";
1048: print $client "ok\n";
1049: } else {
1050: print $client "error: ".($!+0)
1051: ." IO::File->new Failed "
1052: ."while attempting log\n";
1053: }
1054: }
1055: # ------------------------------------------------------------------------- put
1056: } elsif ($userinput =~ /^put/) {
1057: my ($cmd,$udom,$uname,$namespace,$what)
1058: =split(/:/,$userinput);
1059: $namespace=~s/\//\_/g;
1060: $namespace=~s/\W//g;
1061: if ($namespace ne 'roles') {
1062: chomp($what);
1063: my $proname=propath($udom,$uname);
1064: my $now=time;
1065: unless ($namespace=~/^nohist\_/) {
1066: my $hfh;
1067: if (
1068: $hfh=IO::File->new(">>$proname/$namespace.hist")
1069: ) { print $hfh "P:$now:$what\n"; }
1070: }
1071: my @pairs=split(/\&/,$what);
1072: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1073: foreach $pair (@pairs) {
1074: ($key,$value)=split(/=/,$pair);
1075: $hash{$key}=$value;
1076: }
1077: if (untie(%hash)) {
1078: print $client "ok\n";
1079: } else {
1080: print $client "error: ".($!+0)
1081: ." untie(GDBM) failed ".
1082: "while attempting put\n";
1083: }
1084: } else {
1085: print $client "error: ".($!)
1086: ." tie(GDBM) Failed ".
1087: "while attempting put\n";
1088: }
1089: } else {
1090: print $client "refused\n";
1091: }
1092: # -------------------------------------------------------------------- rolesput
1093: } elsif ($userinput =~ /^rolesput/) {
1094: &Debug("rolesput");
1095: if ($wasenc==1) {
1096: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1097: =split(/:/,$userinput);
1098: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1099: "user = ".$exeuser." udom=".$udom.
1100: "what = ".$what);
1101: my $namespace='roles';
1102: chomp($what);
1103: my $proname=propath($udom,$uname);
1104: my $now=time;
1105: {
1106: my $hfh;
1107: if (
1108: $hfh=IO::File->new(">>$proname/$namespace.hist")
1109: ) {
1110: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1111: }
1112: }
1113: my @pairs=split(/\&/,$what);
1114: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1115: foreach $pair (@pairs) {
1116: ($key,$value)=split(/=/,$pair);
1117: &ManagePermissions($key, $udom, $uname,
1118: &GetAuthType( $udom,
1119: $uname));
1120: $hash{$key}=$value;
1121:
1122: }
1123: if (untie(%hash)) {
1124: print $client "ok\n";
1125: } else {
1126: print $client "error: ".($!+0)
1127: ." untie(GDBM) Failed ".
1128: "while attempting rolesput\n";
1129: }
1130: } else {
1131: print $client "error: ".($!+0)
1132: ." tie(GDBM) Failed ".
1133: "while attempting rolesput\n";
1134: }
1135: } else {
1136: print $client "refused\n";
1137: }
1138: # -------------------------------------------------------------------- rolesdel
1139: } elsif ($userinput =~ /^rolesdel/) {
1140: &Debug("rolesdel");
1141: if ($wasenc==1) {
1142: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1143: =split(/:/,$userinput);
1144: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1145: "user = ".$exeuser." udom=".$udom.
1146: "what = ".$what);
1147: my $namespace='roles';
1148: chomp($what);
1149: my $proname=propath($udom,$uname);
1150: my $now=time;
1151: {
1152: my $hfh;
1153: if (
1154: $hfh=IO::File->new(">>$proname/$namespace.hist")
1155: ) {
1156: print $hfh "D:$now:$exedom:$exeuser:$what\n";
1157: }
1158: }
1159: my @rolekeys=split(/\&/,$what);
1160: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1161: foreach $key (@rolekeys) {
1162: delete $hash{$key};
1163:
1164: }
1165: if (untie(%hash)) {
1166: print $client "ok\n";
1167: } else {
1168: print $client "error: ".($!+0)
1169: ." untie(GDBM) Failed ".
1170: "while attempting rolesdel\n";
1171: }
1172: } else {
1173: print $client "error: ".($!+0)
1174: ." tie(GDBM) Failed ".
1175: "while attempting rolesdel\n";
1176: }
1177: } else {
1178: print $client "refused\n";
1179: }
1180: # ------------------------------------------------------------------------- get
1181: } elsif ($userinput =~ /^get/) {
1182: my ($cmd,$udom,$uname,$namespace,$what)
1183: =split(/:/,$userinput);
1184: $namespace=~s/\//\_/g;
1185: $namespace=~s/\W//g;
1186: chomp($what);
1187: my @queries=split(/\&/,$what);
1188: my $proname=propath($udom,$uname);
1189: my $qresult='';
1190: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1191: for ($i=0;$i<=$#queries;$i++) {
1192: $qresult.="$hash{$queries[$i]}&";
1193: }
1194: if (untie(%hash)) {
1195: $qresult=~s/\&$//;
1196: print $client "$qresult\n";
1197: } else {
1198: print $client "error: ".($!+0)
1199: ." untie(GDBM) Failed ".
1200: "while attempting get\n";
1201: }
1202: } else {
1203: if ($!+0 == 2) {
1204: print $client "error:No such file or ".
1205: "GDBM reported bad block error\n";
1206: } else {
1207: print $client "error: ".($!+0)
1208: ." tie(GDBM) Failed ".
1209: "while attempting get\n";
1210: }
1211: }
1212: # ------------------------------------------------------------------------ eget
1213: } elsif ($userinput =~ /^eget/) {
1214: my ($cmd,$udom,$uname,$namespace,$what)
1215: =split(/:/,$userinput);
1216: $namespace=~s/\//\_/g;
1217: $namespace=~s/\W//g;
1218: chomp($what);
1219: my @queries=split(/\&/,$what);
1220: my $proname=propath($udom,$uname);
1221: my $qresult='';
1222: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1223: for ($i=0;$i<=$#queries;$i++) {
1224: $qresult.="$hash{$queries[$i]}&";
1225: }
1226: if (untie(%hash)) {
1227: $qresult=~s/\&$//;
1228: if ($cipher) {
1229: my $cmdlength=length($qresult);
1230: $qresult.=" ";
1231: my $encqresult='';
1232: for
1233: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1234: $encqresult.=
1235: unpack("H16",
1236: $cipher->encrypt(substr($qresult,$encidx,8)));
1237: }
1238: print $client "enc:$cmdlength:$encqresult\n";
1239: } else {
1240: print $client "error:no_key\n";
1241: }
1242: } else {
1243: print $client "error: ".($!+0)
1244: ." untie(GDBM) Failed ".
1245: "while attempting eget\n";
1246: }
1247: } else {
1248: print $client "error: ".($!+0)
1249: ." tie(GDBM) Failed ".
1250: "while attempting eget\n";
1251: }
1252: # ------------------------------------------------------------------------- del
1253: } elsif ($userinput =~ /^del/) {
1254: my ($cmd,$udom,$uname,$namespace,$what)
1255: =split(/:/,$userinput);
1256: $namespace=~s/\//\_/g;
1257: $namespace=~s/\W//g;
1258: chomp($what);
1259: my $proname=propath($udom,$uname);
1260: my $now=time;
1261: unless ($namespace=~/^nohist\_/) {
1262: my $hfh;
1263: if (
1264: $hfh=IO::File->new(">>$proname/$namespace.hist")
1265: ) { print $hfh "D:$now:$what\n"; }
1266: }
1267: my @keys=split(/\&/,$what);
1268: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1269: foreach $key (@keys) {
1270: delete($hash{$key});
1271: }
1272: if (untie(%hash)) {
1273: print $client "ok\n";
1274: } else {
1275: print $client "error: ".($!+0)
1276: ." untie(GDBM) Failed ".
1277: "while attempting del\n";
1278: }
1279: } else {
1280: print $client "error: ".($!+0)
1281: ." tie(GDBM) Failed ".
1282: "while attempting del\n";
1283: }
1284: # ------------------------------------------------------------------------ keys
1285: } elsif ($userinput =~ /^keys/) {
1286: my ($cmd,$udom,$uname,$namespace)
1287: =split(/:/,$userinput);
1288: $namespace=~s/\//\_/g;
1289: $namespace=~s/\W//g;
1290: my $proname=propath($udom,$uname);
1291: my $qresult='';
1292: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1293: foreach $key (keys %hash) {
1294: $qresult.="$key&";
1295: }
1296: if (untie(%hash)) {
1297: $qresult=~s/\&$//;
1298: print $client "$qresult\n";
1299: } else {
1300: print $client "error: ".($!+0)
1301: ." untie(GDBM) Failed ".
1302: "while attempting keys\n";
1303: }
1304: } else {
1305: print $client "error: ".($!+0)
1306: ." tie(GDBM) Failed ".
1307: "while attempting keys\n";
1308: }
1309: # ----------------------------------------------------------------- dumpcurrent
1310: } elsif ($userinput =~ /^currentdump/) {
1311: my ($cmd,$udom,$uname,$namespace)
1312: =split(/:/,$userinput);
1313: $namespace=~s/\//\_/g;
1314: $namespace=~s/\W//g;
1315: my $qresult='';
1316: my $proname=propath($udom,$uname);
1317: if (tie(%hash,'GDBM_File',
1318: "$proname/$namespace.db",
1319: &GDBM_READER(),0640)) {
1320: # Structure of %data:
1321: # $data{$symb}->{$parameter}=$value;
1322: # $data{$symb}->{'v.'.$parameter}=$version;
1323: # since $parameter will be unescaped, we do not
1324: # have to worry about silly parameter names...
1325: my %data = ();
1326: while (my ($key,$value) = each(%hash)) {
1327: my ($v,$symb,$param) = split(/:/,$key);
1328: next if ($v eq 'version' || $symb eq 'keys');
1329: next if (exists($data{$symb}) &&
1330: exists($data{$symb}->{$param}) &&
1331: $data{$symb}->{'v.'.$param} > $v);
1332: $data{$symb}->{$param}=$value;
1333: $data{$symb}->{'v.'.$param}=$v;
1334: }
1335: if (untie(%hash)) {
1336: while (my ($symb,$param_hash) = each(%data)) {
1337: while(my ($param,$value) = each (%$param_hash)){
1338: next if ($param =~ /^v\./);
1339: $qresult.=$symb.':'.$param.'='.$value.'&';
1340: }
1341: }
1342: chop($qresult);
1343: print $client "$qresult\n";
1344: } else {
1345: print $client "error: ".($!+0)
1346: ." untie(GDBM) Failed ".
1347: "while attempting currentdump\n";
1348: }
1349: } else {
1350: print $client "error: ".($!+0)
1351: ." tie(GDBM) Failed ".
1352: "while attempting currentdump\n";
1353: }
1354: # ------------------------------------------------------------------------ dump
1355: } elsif ($userinput =~ /^dump/) {
1356: my ($cmd,$udom,$uname,$namespace,$regexp)
1357: =split(/:/,$userinput);
1358: $namespace=~s/\//\_/g;
1359: $namespace=~s/\W//g;
1360: if (defined($regexp)) {
1361: $regexp=&unescape($regexp);
1362: } else {
1363: $regexp='.';
1364: }
1365: my $qresult='';
1366: my $proname=propath($udom,$uname);
1367: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1368: study($regexp);
1369: while (($key,$value) = each(%hash)) {
1370: if ($regexp eq '.') {
1371: $qresult.=$key.'='.$value.'&';
1372: } else {
1373: my $unescapeKey = &unescape($key);
1374: if (eval('$unescapeKey=~/$regexp/')) {
1375: $qresult.="$key=$value&";
1376: }
1377: }
1378: }
1379: if (untie(%hash)) {
1380: chop($qresult);
1381: print $client "$qresult\n";
1382: } else {
1383: print $client "error: ".($!+0)
1384: ." untie(GDBM) Failed ".
1385: "while attempting dump\n";
1386: }
1387: } else {
1388: print $client "error: ".($!+0)
1389: ." tie(GDBM) Failed ".
1390: "while attempting dump\n";
1391: }
1392: # ----------------------------------------------------------------------- store
1393: } elsif ($userinput =~ /^store/) {
1394: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1395: =split(/:/,$userinput);
1396: $namespace=~s/\//\_/g;
1397: $namespace=~s/\W//g;
1398: if ($namespace ne 'roles') {
1399: chomp($what);
1400: my $proname=propath($udom,$uname);
1401: my $now=time;
1402: unless ($namespace=~/^nohist\_/) {
1403: my $hfh;
1404: if (
1405: $hfh=IO::File->new(">>$proname/$namespace.hist")
1406: ) { print $hfh "P:$now:$rid:$what\n"; }
1407: }
1408: my @pairs=split(/\&/,$what);
1409:
1410: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
1411: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1412: my $key;
1413: $hash{"version:$rid"}++;
1414: my $version=$hash{"version:$rid"};
1415: my $allkeys='';
1416: foreach $pair (@pairs) {
1417: ($key,$value)=split(/=/,$pair);
1418: $allkeys.=$key.':';
1419: $hash{"$version:$rid:$key"}=$value;
1420: }
1421: $hash{"$version:$rid:timestamp"}=$now;
1422: $allkeys.='timestamp';
1423: $hash{"$version:keys:$rid"}=$allkeys;
1424: if (untie(%hash)) {
1425: print $client "ok\n";
1426: } else {
1427: print $client "error: ".($!+0)
1428: ." untie(GDBM) Failed ".
1429: "while attempting store\n";
1430: }
1431: } else {
1432: print $client "error: ".($!+0)
1433: ." tie(GDBM) Failed ".
1434: "while attempting store\n";
1435: }
1436: } else {
1437: print $client "refused\n";
1438: }
1439: # --------------------------------------------------------------------- restore
1440: } elsif ($userinput =~ /^restore/) {
1441: my ($cmd,$udom,$uname,$namespace,$rid)
1442: =split(/:/,$userinput);
1443: $namespace=~s/\//\_/g;
1444: $namespace=~s/\W//g;
1445: chomp($rid);
1446: my $proname=propath($udom,$uname);
1447: my $qresult='';
1448: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1449: my $version=$hash{"version:$rid"};
1450: $qresult.="version=$version&";
1451: my $scope;
1452: for ($scope=1;$scope<=$version;$scope++) {
1453: my $vkeys=$hash{"$scope:keys:$rid"};
1454: my @keys=split(/:/,$vkeys);
1455: my $key;
1456: $qresult.="$scope:keys=$vkeys&";
1457: foreach $key (@keys) {
1458: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1459: }
1460: }
1461: if (untie(%hash)) {
1462: $qresult=~s/\&$//;
1463: print $client "$qresult\n";
1464: } else {
1465: print $client "error: ".($!+0)
1466: ." untie(GDBM) Failed ".
1467: "while attempting restore\n";
1468: }
1469: } else {
1470: print $client "error: ".($!+0)
1471: ." tie(GDBM) Failed ".
1472: "while attempting restore\n";
1473: }
1474: # -------------------------------------------------------------------- chatsend
1475: } elsif ($userinput =~ /^chatsend/) {
1476: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1477: &chatadd($cdom,$cnum,$newpost);
1478: print $client "ok\n";
1479: # -------------------------------------------------------------------- chatretr
1480: } elsif ($userinput =~ /^chatretr/) {
1481: my
1482: ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
1483: my $reply='';
1484: foreach (&getchat($cdom,$cnum,$udom,$uname)) {
1485: $reply.=&escape($_).':';
1486: }
1487: $reply=~s/\:$//;
1488: print $client $reply."\n";
1489: # ------------------------------------------------------------------- querysend
1490: } elsif ($userinput =~ /^querysend/) {
1491: my ($cmd,$query,
1492: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1493: $query=~s/\n*$//g;
1494: print $client "".
1495: sqlreply("$hostid{$clientip}\&$query".
1496: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1497: # ------------------------------------------------------------------ queryreply
1498: } elsif ($userinput =~ /^queryreply/) {
1499: my ($cmd,$id,$reply)=split(/:/,$userinput);
1500: my $store;
1501: my $execdir=$perlvar{'lonDaemons'};
1502: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1503: $reply=~s/\&/\n/g;
1504: print $store $reply;
1505: close $store;
1506: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1507: print $store2 "done\n";
1508: close $store2;
1509: print $client "ok\n";
1510: }
1511: else {
1512: print $client "error: ".($!+0)
1513: ." IO::File->new Failed ".
1514: "while attempting queryreply\n";
1515: }
1516: # ----------------------------------------------------------------- courseidput
1517: } elsif ($userinput =~ /^courseidput/) {
1518: my ($cmd,$udom,$what)=split(/:/,$userinput);
1519: chomp($what);
1520: $udom=~s/\W//g;
1521: my $proname=
1522: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1523: my $now=time;
1524: my @pairs=split(/\&/,$what);
1525: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1526: foreach $pair (@pairs) {
1527: ($key,$value)=split(/=/,$pair);
1528: $hash{$key}=$value.':'.$now;
1529: }
1530: if (untie(%hash)) {
1531: print $client "ok\n";
1532: } else {
1533: print $client "error: ".($!+0)
1534: ." untie(GDBM) Failed ".
1535: "while attempting courseidput\n";
1536: }
1537: } else {
1538: print $client "error: ".($!+0)
1539: ." tie(GDBM) Failed ".
1540: "while attempting courseidput\n";
1541: }
1542: # ---------------------------------------------------------------- courseiddump
1543: } elsif ($userinput =~ /^courseiddump/) {
1544: my ($cmd,$udom,$since,$description)
1545: =split(/:/,$userinput);
1546: if (defined($description)) {
1547: $description=&unescape($description);
1548: } else {
1549: $description='.';
1550: }
1551: unless (defined($since)) { $since=0; }
1552: my $qresult='';
1553: my $proname=
1554: "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
1555: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1556: while (($key,$value) = each(%hash)) {
1557: my ($descr,$lasttime)=split(/\:/,$value);
1558: if ($lasttime<$since) { next; }
1559: if ($regexp eq '.') {
1560: $qresult.=$key.'='.$descr.'&';
1561: } else {
1562: my $unescapeVal = &unescape($descr);
1563: if (eval('$unescapeVal=~/$description/i')) {
1564: $qresult.="$key=$descr&";
1565: }
1566: }
1567: }
1568: if (untie(%hash)) {
1569: chop($qresult);
1570: print $client "$qresult\n";
1571: } else {
1572: print $client "error: ".($!+0)
1573: ." untie(GDBM) Failed ".
1574: "while attempting courseiddump\n";
1575: }
1576: } else {
1577: print $client "error: ".($!+0)
1578: ." tie(GDBM) Failed ".
1579: "while attempting courseiddump\n";
1580: }
1581: # ----------------------------------------------------------------------- idput
1582: } elsif ($userinput =~ /^idput/) {
1583: my ($cmd,$udom,$what)=split(/:/,$userinput);
1584: chomp($what);
1585: $udom=~s/\W//g;
1586: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1587: my $now=time;
1588: {
1589: my $hfh;
1590: if (
1591: $hfh=IO::File->new(">>$proname.hist")
1592: ) { print $hfh "P:$now:$what\n"; }
1593: }
1594: my @pairs=split(/\&/,$what);
1595: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
1596: foreach $pair (@pairs) {
1597: ($key,$value)=split(/=/,$pair);
1598: $hash{$key}=$value;
1599: }
1600: if (untie(%hash)) {
1601: print $client "ok\n";
1602: } else {
1603: print $client "error: ".($!+0)
1604: ." untie(GDBM) Failed ".
1605: "while attempting idput\n";
1606: }
1607: } else {
1608: print $client "error: ".($!+0)
1609: ." tie(GDBM) Failed ".
1610: "while attempting idput\n";
1611: }
1612: # ----------------------------------------------------------------------- idget
1613: } elsif ($userinput =~ /^idget/) {
1614: my ($cmd,$udom,$what)=split(/:/,$userinput);
1615: chomp($what);
1616: $udom=~s/\W//g;
1617: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1618: my @queries=split(/\&/,$what);
1619: my $qresult='';
1620: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
1621: for ($i=0;$i<=$#queries;$i++) {
1622: $qresult.="$hash{$queries[$i]}&";
1623: }
1624: if (untie(%hash)) {
1625: $qresult=~s/\&$//;
1626: print $client "$qresult\n";
1627: } else {
1628: print $client "error: ".($!+0)
1629: ." untie(GDBM) Failed ".
1630: "while attempting idget\n";
1631: }
1632: } else {
1633: print $client "error: ".($!+0)
1634: ." tie(GDBM) Failed ".
1635: "while attempting idget\n";
1636: }
1637: # ---------------------------------------------------------------------- tmpput
1638: } elsif ($userinput =~ /^tmpput/) {
1639: my ($cmd,$what)=split(/:/,$userinput);
1640: my $store;
1641: $tmpsnum++;
1642: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1643: $id=~s/\W/\_/g;
1644: $what=~s/\n//g;
1645: my $execdir=$perlvar{'lonDaemons'};
1646: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1647: print $store $what;
1648: close $store;
1649: print $client "$id\n";
1650: }
1651: else {
1652: print $client "error: ".($!+0)
1653: ."IO::File->new Failed ".
1654: "while attempting tmpput\n";
1655: }
1656:
1657: # ---------------------------------------------------------------------- tmpget
1658: } elsif ($userinput =~ /^tmpget/) {
1659: my ($cmd,$id)=split(/:/,$userinput);
1660: chomp($id);
1661: $id=~s/\W/\_/g;
1662: my $store;
1663: my $execdir=$perlvar{'lonDaemons'};
1664: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1665: my $reply=<$store>;
1666: print $client "$reply\n";
1667: close $store;
1668: }
1669: else {
1670: print $client "error: ".($!+0)
1671: ."IO::File->new Failed ".
1672: "while attempting tmpget\n";
1673: }
1674:
1675: # ---------------------------------------------------------------------- tmpdel
1676: } elsif ($userinput =~ /^tmpdel/) {
1677: my ($cmd,$id)=split(/:/,$userinput);
1678: chomp($id);
1679: $id=~s/\W/\_/g;
1680: my $execdir=$perlvar{'lonDaemons'};
1681: if (unlink("$execdir/tmp/$id.tmp")) {
1682: print $client "ok\n";
1683: } else {
1684: print $client "error: ".($!+0)
1685: ."Unlink tmp Failed ".
1686: "while attempting tmpdel\n";
1687: }
1688: # -------------------------------------------------------------------------- ls
1689: } elsif ($userinput =~ /^ls/) {
1690: my ($cmd,$ulsdir)=split(/:/,$userinput);
1691: my $ulsout='';
1692: my $ulsfn;
1693: if (-e $ulsdir) {
1694: if(-d $ulsdir) {
1695: if (opendir(LSDIR,$ulsdir)) {
1696: while ($ulsfn=readdir(LSDIR)) {
1697: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1698: $ulsout.=$ulsfn.'&'.
1699: join('&',@ulsstats).':';
1700: }
1701: closedir(LSDIR);
1702: }
1703: } else {
1704: my @ulsstats=stat($ulsdir);
1705: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1706: }
1707: } else {
1708: $ulsout='no_such_dir';
1709: }
1710: if ($ulsout eq '') { $ulsout='empty'; }
1711: print $client "$ulsout\n";
1712: # ------------------------------------------------------------------ Hanging up
1713: } elsif (($userinput =~ /^exit/) ||
1714: ($userinput =~ /^init/)) {
1715: &logthis(
1716: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1717: print $client "bye\n";
1718: $client->close();
1719: last;
1720: # ------------------------------------------------------------- unknown command
1721: } elsif ($userinput =~ /^sethost:/) {
1722: print $client &sethost($userinput)."\n";
1723: } elsif ($userinput =~/^version:/) {
1724: print $client &version($userinput)."\n";
1725: } else {
1726: # unknown command
1727: print $client "unknown_cmd\n";
1728: }
1729: # -------------------------------------------------------------------- complete
1730: alarm(0);
1731: &status('Listening to '.$hostid{$clientip});
1732: }
1733: # --------------------------------------------- client unknown or fishy, refuse
1734: } else {
1735: print $client "refused\n";
1736: $client->close();
1737: &logthis("<font color=blue>WARNING: "
1738: ."Rejected client $clientip, closing connection</font>");
1739: }
1740: }
1741:
1742: # =============================================================================
1743:
1744: &logthis("<font color=red>CRITICAL: "
1745: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1746:
1747:
1748: # this exit is VERY important, otherwise the child will become
1749: # a producer of more and more children, forking yourself into
1750: # process death.
1751: exit;
1752:
1753: }
1754:
1755:
1756: #
1757: # Checks to see if the input roleput request was to set
1758: # an author role. If so, invokes the lchtmldir script to set
1759: # up a correct public_html
1760: # Parameters:
1761: # request - The request sent to the rolesput subchunk.
1762: # We're looking for /domain/_au
1763: # domain - The domain in which the user is having roles doctored.
1764: # user - Name of the user for which the role is being put.
1765: # authtype - The authentication type associated with the user.
1766: #
1767: sub ManagePermissions
1768: {
1769: my $request = shift;
1770: my $domain = shift;
1771: my $user = shift;
1772: my $authtype= shift;
1773:
1774: # See if the request is of the form /$domain/_au
1775:
1776: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1777: my $execdir = $perlvar{'lonDaemons'};
1778: my $userhome= "/home/$user" ;
1779: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1780: system("$execdir/lchtmldir $userhome $user $authtype");
1781: }
1782: }
1783: #
1784: # GetAuthType - Determines the authorization type of a user in a domain.
1785:
1786: # Returns the authorization type or nouser if there is no such user.
1787: #
1788: sub GetAuthType
1789: {
1790: my $domain = shift;
1791: my $user = shift;
1792:
1793: Debug("GetAuthType( $domain, $user ) \n");
1794: my $proname = &propath($domain, $user);
1795: my $passwdfile = "$proname/passwd";
1796: if( -e $passwdfile ) {
1797: my $pf = IO::File->new($passwdfile);
1798: my $realpassword = <$pf>;
1799: chomp($realpassword);
1800: Debug("Password info = $realpassword\n");
1801: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1802: Debug("Authtype = $authtype, content = $contentpwd\n");
1803: my $availinfo = '';
1804: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1805: $availinfo = $contentpwd;
1806: }
1807:
1808: return "$authtype:$availinfo";
1809: }
1810: else {
1811: Debug("Returning nouser");
1812: return "nouser";
1813: }
1814: }
1815:
1816: sub addline {
1817: my ($fname,$hostid,$ip,$newline)=@_;
1818: my $contents;
1819: my $found=0;
1820: my $expr='^'.$hostid.':'.$ip.':';
1821: $expr =~ s/\./\\\./g;
1822: if ($sh=IO::File->new("$fname.subscription")) {
1823: while (my $subline=<$sh>) {
1824: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1825: }
1826: $sh->close();
1827: }
1828: $sh=IO::File->new(">$fname.subscription");
1829: if ($contents) { print $sh $contents; }
1830: if ($newline) { print $sh $newline; }
1831: $sh->close();
1832: return $found;
1833: }
1834:
1835: sub getchat {
1836: my ($cdom,$cname,$udom,$uname)=@_;
1837: my %hash;
1838: my $proname=&propath($cdom,$cname);
1839: my @entries=();
1840: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1841: &GDBM_READER(),0640)) {
1842: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1843: untie %hash;
1844: }
1845: my @participants=();
1846: $cutoff=time-60;
1847: if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1848: &GDBM_WRCREAT(),0640)) {
1849: $hash{$uname.':'.$udom}=time;
1850: foreach (sort keys %hash) {
1851: if ($hash{$_}>$cutoff) {
1852: $participants[$#participants+1]='active_participant:'.$_;
1853: }
1854: }
1855: untie %hash;
1856: }
1857: return (@participants,@entries);
1858: }
1859:
1860: sub chatadd {
1861: my ($cdom,$cname,$newchat)=@_;
1862: my %hash;
1863: my $proname=&propath($cdom,$cname);
1864: my @entries=();
1865: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1866: &GDBM_WRCREAT(),0640)) {
1867: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1868: my $time=time;
1869: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1870: my ($thentime,$idnum)=split(/\_/,$lastid);
1871: my $newid=$time.'_000000';
1872: if ($thentime==$time) {
1873: $idnum=~s/^0+//;
1874: $idnum++;
1875: $idnum=substr('000000'.$idnum,-6,6);
1876: $newid=$time.'_'.$idnum;
1877: }
1878: $hash{$newid}=$newchat;
1879: my $expired=$time-3600;
1880: foreach (keys %hash) {
1881: my ($thistime)=($_=~/(\d+)\_/);
1882: if ($thistime<$expired) {
1883: delete $hash{$_};
1884: }
1885: }
1886: untie %hash;
1887: }
1888: }
1889:
1890: sub unsub {
1891: my ($fname,$clientip)=@_;
1892: my $result;
1893: if (unlink("$fname.$hostid{$clientip}")) {
1894: $result="ok\n";
1895: } else {
1896: $result="not_subscribed\n";
1897: }
1898: if (-e "$fname.subscription") {
1899: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1900: if ($found) { $result="ok\n"; }
1901: } else {
1902: if ($result != "ok\n") { $result="not_subscribed\n"; }
1903: }
1904: return $result;
1905: }
1906:
1907: sub currentversion {
1908: my $fname=shift;
1909: my $version=-1;
1910: my $ulsdir='';
1911: if ($fname=~/^(.+)\/[^\/]+$/) {
1912: $ulsdir=$1;
1913: }
1914: my ($fnamere1,$fnamere2);
1915: # remove version if already specified
1916: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1917: # get the bits that go before and after the version number
1918: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
1919: $fnamere1=$1;
1920: $fnamere2='.'.$2;
1921: }
1922: if (-e $fname) { $version=1; }
1923: if (-e $ulsdir) {
1924: if(-d $ulsdir) {
1925: if (opendir(LSDIR,$ulsdir)) {
1926:
1927: while ($ulsfn=readdir(LSDIR)) {
1928: # see if this is a regular file (ignore links produced earlier)
1929: my $thisfile=$ulsdir.'/'.$ulsfn;
1930: unless (-l $thisfile) {
1931: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E/) {
1932: if ($1>$version) { $version=$1; }
1933: }
1934: }
1935: }
1936: closedir(LSDIR);
1937: $version++;
1938: }
1939: }
1940: }
1941: return $version;
1942: }
1943:
1944: sub thisversion {
1945: my $fname=shift;
1946: my $version=-1;
1947: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1948: $version=$1;
1949: }
1950: return $version;
1951: }
1952:
1953: sub subscribe {
1954: my ($userinput,$clientip)=@_;
1955: my $result;
1956: my ($cmd,$fname)=split(/:/,$userinput);
1957: my $ownership=&ishome($fname);
1958: if ($ownership eq 'owner') {
1959: # explitly asking for the current version?
1960: unless (-e $fname) {
1961: my $currentversion=¤tversion($fname);
1962: if (&thisversion($fname)==$currentversion) {
1963: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1964: my $root=$1;
1965: my $extension=$2;
1966: symlink($root.'.'.$extension,
1967: $root.'.'.$currentversion.'.'.$extension);
1968: unless ($extension=~/\.meta$/) {
1969: symlink($root.'.'.$extension.'.meta',
1970: $root.'.'.$currentversion.'.'.$extension.'.meta');
1971: }
1972: }
1973: }
1974: }
1975: if (-e $fname) {
1976: if (-d $fname) {
1977: $result="directory\n";
1978: } else {
1979: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1980: $now=time;
1981: my $found=&addline($fname,$hostid{$clientip},$clientip,
1982: "$hostid{$clientip}:$clientip:$now\n");
1983: if ($found) { $result="$fname\n"; }
1984: # if they were subscribed to only meta data, delete that
1985: # subscription, when you subscribe to a file you also get
1986: # the metadata
1987: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1988: $fname=~s/\/home\/httpd\/html\/res/raw/;
1989: $fname="http://$thisserver/".$fname;
1990: $result="$fname\n";
1991: }
1992: } else {
1993: $result="not_found\n";
1994: }
1995: } else {
1996: $result="rejected\n";
1997: }
1998: return $result;
1999: }
2000:
2001: sub make_passwd_file {
2002: my ($uname, $umode,$npass,$passfilename)=@_;
2003: my $result="ok\n";
2004: if ($umode eq 'krb4' or $umode eq 'krb5') {
2005: {
2006: my $pf = IO::File->new(">$passfilename");
2007: print $pf "$umode:$npass\n";
2008: }
2009: } elsif ($umode eq 'internal') {
2010: my $salt=time;
2011: $salt=substr($salt,6,2);
2012: my $ncpass=crypt($npass,$salt);
2013: {
2014: &Debug("Creating internal auth");
2015: my $pf = IO::File->new(">$passfilename");
2016: print $pf "internal:$ncpass\n";
2017: }
2018: } elsif ($umode eq 'localauth') {
2019: {
2020: my $pf = IO::File->new(">$passfilename");
2021: print $pf "localauth:$npass\n";
2022: }
2023: } elsif ($umode eq 'unix') {
2024: {
2025: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
2026: {
2027: &Debug("Executing external: ".$execpath);
2028: &Debug("user = ".$uname.", Password =". $npass);
2029: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
2030: print $se "$uname\n";
2031: print $se "$npass\n";
2032: print $se "$npass\n";
2033: }
2034: my $useraddok = $?;
2035: if($useraddok > 0) {
2036: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
2037: }
2038: my $pf = IO::File->new(">$passfilename");
2039: print $pf "unix:\n";
2040: }
2041: } elsif ($umode eq 'none') {
2042: {
2043: my $pf = IO::File->new(">$passfilename");
2044: print $pf "none:\n";
2045: }
2046: } else {
2047: $result="auth_mode_error\n";
2048: }
2049: return $result;
2050: }
2051:
2052: sub sethost {
2053: my ($remotereq) = @_;
2054: my (undef,$hostid)=split(/:/,$remotereq);
2055: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
2056: if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
2057: $currenthostid=$hostid;
2058: $currentdomainid=$hostdom{$hostid};
2059: &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
2060: } else {
2061: &logthis("Requested host id $hostid not an alias of ".
2062: $perlvar{'lonHostID'}." refusing connection");
2063: return 'unable_to_set';
2064: }
2065: return 'ok';
2066: }
2067:
2068: sub version {
2069: my ($userinput)=@_;
2070: $remoteVERSION=(split(/:/,$userinput))[1];
2071: return "version:$VERSION";
2072: }
2073:
2074: #There is a copy of this in lonnet.pm
2075: sub userload {
2076: my $numusers=0;
2077: {
2078: opendir(LONIDS,$perlvar{'lonIDsDir'});
2079: my $filename;
2080: my $curtime=time;
2081: while ($filename=readdir(LONIDS)) {
2082: if ($filename eq '.' || $filename eq '..') {next;}
2083: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
2084: if ($curtime-$mtime < 3600) { $numusers++; }
2085: }
2086: closedir(LONIDS);
2087: }
2088: my $userloadpercent=0;
2089: my $maxuserload=$perlvar{'lonUserLoadLim'};
2090: if ($maxuserload) {
2091: $userloadpercent=100*$numusers/$maxuserload;
2092: }
2093: $userloadpercent=sprintf("%.2f",$userloadpercent);
2094: return $userloadpercent;
2095: }
2096:
2097: # ----------------------------------- POD (plain old documentation, CPAN style)
2098:
2099: =head1 NAME
2100:
2101: lond - "LON Daemon" Server (port "LOND" 5663)
2102:
2103: =head1 SYNOPSIS
2104:
2105: Usage: B<lond>
2106:
2107: Should only be run as user=www. This is a command-line script which
2108: is invoked by B<loncron>. There is no expectation that a typical user
2109: will manually start B<lond> from the command-line. (In other words,
2110: DO NOT START B<lond> YOURSELF.)
2111:
2112: =head1 DESCRIPTION
2113:
2114: There are two characteristics associated with the running of B<lond>,
2115: PROCESS MANAGEMENT (starting, stopping, handling child processes)
2116: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
2117: subscriptions, etc). These are described in two large
2118: sections below.
2119:
2120: B<PROCESS MANAGEMENT>
2121:
2122: Preforker - server who forks first. Runs as a daemon. HUPs.
2123: Uses IDEA encryption
2124:
2125: B<lond> forks off children processes that correspond to the other servers
2126: in the network. Management of these processes can be done at the
2127: parent process level or the child process level.
2128:
2129: B<logs/lond.log> is the location of log messages.
2130:
2131: The process management is now explained in terms of linux shell commands,
2132: subroutines internal to this code, and signal assignments:
2133:
2134: =over 4
2135:
2136: =item *
2137:
2138: PID is stored in B<logs/lond.pid>
2139:
2140: This is the process id number of the parent B<lond> process.
2141:
2142: =item *
2143:
2144: SIGTERM and SIGINT
2145:
2146: Parent signal assignment:
2147: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
2148:
2149: Child signal assignment:
2150: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
2151: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
2152: to restart a new child.)
2153:
2154: Command-line invocations:
2155: B<kill> B<-s> SIGTERM I<PID>
2156: B<kill> B<-s> SIGINT I<PID>
2157:
2158: Subroutine B<HUNTSMAN>:
2159: This is only invoked for the B<lond> parent I<PID>.
2160: This kills all the children, and then the parent.
2161: The B<lonc.pid> file is cleared.
2162:
2163: =item *
2164:
2165: SIGHUP
2166:
2167: Current bug:
2168: This signal can only be processed the first time
2169: on the parent process. Subsequent SIGHUP signals
2170: have no effect.
2171:
2172: Parent signal assignment:
2173: $SIG{HUP} = \&HUPSMAN;
2174:
2175: Child signal assignment:
2176: none (nothing happens)
2177:
2178: Command-line invocations:
2179: B<kill> B<-s> SIGHUP I<PID>
2180:
2181: Subroutine B<HUPSMAN>:
2182: This is only invoked for the B<lond> parent I<PID>,
2183: This kills all the children, and then the parent.
2184: The B<lond.pid> file is cleared.
2185:
2186: =item *
2187:
2188: SIGUSR1
2189:
2190: Parent signal assignment:
2191: $SIG{USR1} = \&USRMAN;
2192:
2193: Child signal assignment:
2194: $SIG{USR1}= \&logstatus;
2195:
2196: Command-line invocations:
2197: B<kill> B<-s> SIGUSR1 I<PID>
2198:
2199: Subroutine B<USRMAN>:
2200: When invoked for the B<lond> parent I<PID>,
2201: SIGUSR1 is sent to all the children, and the status of
2202: each connection is logged.
2203:
2204: =item *
2205:
2206: SIGCHLD
2207:
2208: Parent signal assignment:
2209: $SIG{CHLD} = \&REAPER;
2210:
2211: Child signal assignment:
2212: none
2213:
2214: Command-line invocations:
2215: B<kill> B<-s> SIGCHLD I<PID>
2216:
2217: Subroutine B<REAPER>:
2218: This is only invoked for the B<lond> parent I<PID>.
2219: Information pertaining to the child is removed.
2220: The socket port is cleaned up.
2221:
2222: =back
2223:
2224: B<SERVER-SIDE ACTIVITIES>
2225:
2226: Server-side information can be accepted in an encrypted or non-encrypted
2227: method.
2228:
2229: =over 4
2230:
2231: =item ping
2232:
2233: Query a client in the hosts.tab table; "Are you there?"
2234:
2235: =item pong
2236:
2237: Respond to a ping query.
2238:
2239: =item ekey
2240:
2241: Read in encrypted key, make cipher. Respond with a buildkey.
2242:
2243: =item load
2244:
2245: Respond with CPU load based on a computation upon /proc/loadavg.
2246:
2247: =item currentauth
2248:
2249: Reply with current authentication information (only over an
2250: encrypted channel).
2251:
2252: =item auth
2253:
2254: Only over an encrypted channel, reply as to whether a user's
2255: authentication information can be validated.
2256:
2257: =item passwd
2258:
2259: Allow for a password to be set.
2260:
2261: =item makeuser
2262:
2263: Make a user.
2264:
2265: =item passwd
2266:
2267: Allow for authentication mechanism and password to be changed.
2268:
2269: =item home
2270:
2271: Respond to a question "are you the home for a given user?"
2272:
2273: =item update
2274:
2275: Update contents of a subscribed resource.
2276:
2277: =item unsubscribe
2278:
2279: The server is unsubscribing from a resource.
2280:
2281: =item subscribe
2282:
2283: The server is subscribing to a resource.
2284:
2285: =item log
2286:
2287: Place in B<logs/lond.log>
2288:
2289: =item put
2290:
2291: stores hash in namespace
2292:
2293: =item rolesput
2294:
2295: put a role into a user's environment
2296:
2297: =item get
2298:
2299: returns hash with keys from array
2300: reference filled in from namespace
2301:
2302: =item eget
2303:
2304: returns hash with keys from array
2305: reference filled in from namesp (encrypts the return communication)
2306:
2307: =item rolesget
2308:
2309: get a role from a user's environment
2310:
2311: =item del
2312:
2313: deletes keys out of array from namespace
2314:
2315: =item keys
2316:
2317: returns namespace keys
2318:
2319: =item dump
2320:
2321: dumps the complete (or key matching regexp) namespace into a hash
2322:
2323: =item store
2324:
2325: stores hash permanently
2326: for this url; hashref needs to be given and should be a \%hashname; the
2327: remaining args aren't required and if they aren't passed or are '' they will
2328: be derived from the ENV
2329:
2330: =item restore
2331:
2332: returns a hash for a given url
2333:
2334: =item querysend
2335:
2336: Tells client about the lonsql process that has been launched in response
2337: to a sent query.
2338:
2339: =item queryreply
2340:
2341: Accept information from lonsql and make appropriate storage in temporary
2342: file space.
2343:
2344: =item idput
2345:
2346: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2347: for each student, defined perhaps by the institutional Registrar.)
2348:
2349: =item idget
2350:
2351: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2352: for each student, defined perhaps by the institutional Registrar.)
2353:
2354: =item tmpput
2355:
2356: Accept and store information in temporary space.
2357:
2358: =item tmpget
2359:
2360: Send along temporarily stored information.
2361:
2362: =item ls
2363:
2364: List part of a user's directory.
2365:
2366: =item Hanging up (exit or init)
2367:
2368: What to do when a client tells the server that they (the client)
2369: are leaving the network.
2370:
2371: =item unknown command
2372:
2373: If B<lond> is sent an unknown command (not in the list above),
2374: it replys to the client "unknown_cmd".
2375:
2376: =item UNKNOWN CLIENT
2377:
2378: If the anti-spoofing algorithm cannot verify the client,
2379: the client is rejected (with a "refused" message sent
2380: to the client, and the connection is closed.
2381:
2382: =back
2383:
2384: =head1 PREREQUISITES
2385:
2386: IO::Socket
2387: IO::File
2388: Apache::File
2389: Symbol
2390: POSIX
2391: Crypt::IDEA
2392: LWP::UserAgent()
2393: GDBM_File
2394: Authen::Krb4
2395: Authen::Krb5
2396:
2397: =head1 COREQUISITES
2398:
2399: =head1 OSNAMES
2400:
2401: linux
2402:
2403: =head1 SCRIPT CATEGORIES
2404:
2405: Server/Process
2406:
2407: =cut
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