1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.103.2.1 2003/03/14 21:25:44 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: # 06/26 Scott Harrison
35: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
36: # 12/05 Scott Harrison
37: # 12/05,12/13,12/29 Gerd Kortemeyer
38: # YEAR=2001
39: # Jan 01 Scott Harrison
40: # 02/12 Gerd Kortemeyer
41: # 03/15 Scott Harrison
42: # 03/24 Gerd Kortemeyer
43: # 04/02 Scott Harrison
44: # 05/11,05/28,08/30 Gerd Kortemeyer
45: # 9/30,10/22,11/13,11/15,11/16 Scott Harrison
46: # 11/26,11/27 Gerd Kortemeyer
47: # 12/20 Scott Harrison
48: # 12/22 Gerd Kortemeyer
49: # YEAR=2002
50: # 01/20/02,02/05 Gerd Kortemeyer
51: # 02/05 Guy Albertelli
52: # 02/07 Scott Harrison
53: # 02/12 Gerd Kortemeyer
54: # 02/19 Matthew Hall
55: # 02/25 Gerd Kortemeyer
56: # 05/11 Scott Harrison
57: ###
58:
59: # based on "Perl Cookbook" ISBN 1-56592-243-3
60: # preforker - server who forks first
61: # runs as a daemon
62: # HUPs
63: # uses IDEA encryption
64:
65: use lib '/home/httpd/lib/perl/';
66: use LONCAPA::Configuration;
67:
68: use IO::Socket;
69: use IO::File;
70: use Apache::File;
71: use Symbol;
72: use POSIX;
73: use Crypt::IDEA;
74: use LWP::UserAgent();
75: use GDBM_File;
76: use Authen::Krb4;
77: use Authen::Krb5;
78: use lib '/home/httpd/lib/perl/';
79: use localauth;
80:
81: my $DEBUG = 0; # Non zero to enable debug log entries.
82:
83: my $status='';
84: my $lastlog='';
85:
86: #
87: # The array below are password error strings."
88: #
89: my $lastpwderror = 13; # Largest error number from lcpasswd.
90: my @passwderrors = ("ok",
91: "lcpasswd must be run as user 'www'",
92: "lcpasswd got incorrect number of arguments",
93: "lcpasswd did not get the right nubmer of input text lines",
94: "lcpasswd too many simultaneous pwd changes in progress",
95: "lcpasswd User does not exist.",
96: "lcpasswd Incorrect current passwd",
97: "lcpasswd Unable to su to root.",
98: "lcpasswd Cannot set new passwd.",
99: "lcpasswd Username has invalid characters",
100: "lcpasswd Invalid characters in password",
101: "11", "12",
102: "lcpasswd Password mismatch");
103:
104:
105: # The array below are lcuseradd error strings.:
106:
107: my $lastadderror = 13;
108: my @adderrors = ("ok",
109: "User ID mismatch, lcuseradd must run as user www",
110: "lcuseradd Incorrect number of command line parameters must be 3",
111: "lcuseradd Incorrect number of stdinput lines, must be 3",
112: "lcuseradd Too many other simultaneous pwd changes in progress",
113: "lcuseradd User does not exist",
114: "lcuseradd Unabel to mak ewww member of users's group",
115: "lcuseradd Unable to su to root",
116: "lcuseradd Unable to set password",
117: "lcuseradd Usrname has invbalid charcters",
118: "lcuseradd Password has an invalid character",
119: "lcuseradd User already exists",
120: "lcuseradd Could not add user.",
121: "lcuseradd Password mismatch");
122:
123:
124: #
125: # Convert an error return code from lcpasswd to a string value.
126: #
127: sub lcpasswdstrerror {
128: my $ErrorCode = shift;
129: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
130: return "lcpasswd Unrecognized error return value ".$ErrorCode;
131: } else {
132: return $passwderrors[$ErrorCode];
133: }
134: }
135:
136: #
137: # Convert an error return code from lcuseradd to a string value:
138: #
139: sub lcuseraddstrerror {
140: my $ErrorCode = shift;
141: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
142: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
143: } else {
144: return $adderrors[$ErrorCode];
145: }
146: }
147:
148: # grabs exception and records it to log before exiting
149: sub catchexception {
150: my ($error)=@_;
151: $SIG{'QUIT'}='DEFAULT';
152: $SIG{__DIE__}='DEFAULT';
153: &logthis("<font color=red>CRITICAL: "
154: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
155: ."a crash with this error msg->[$error]</font>");
156: &logthis('Famous last words: '.$status.' - '.$lastlog);
157: if ($client) { print $client "error: $error\n"; }
158: $server->close();
159: die($error);
160: }
161:
162: sub timeout {
163: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
164: &catchexception('Timeout');
165: }
166: # -------------------------------- Set signal handlers to record abnormal exits
167:
168: $SIG{'QUIT'}=\&catchexception;
169: $SIG{__DIE__}=\&catchexception;
170:
171: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
172: &status("Read loncapa.conf and loncapa_apache.conf");
173: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
174: my %perlvar=%{$perlvarref};
175: undef $perlvarref;
176:
177: # ----------------------------- Make sure this process is running from user=www
178: my $wwwid=getpwnam('www');
179: if ($wwwid!=$<) {
180: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
181: $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
182: system("echo 'User ID mismatch. lond must be run as user www.' |\
183: mailto $emailto -s '$subj' > /dev/null");
184: exit 1;
185: }
186:
187: # --------------------------------------------- Check if other instance running
188:
189: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
190:
191: if (-e $pidfile) {
192: my $lfh=IO::File->new("$pidfile");
193: my $pide=<$lfh>;
194: chomp($pide);
195: if (kill 0 => $pide) { die "already running"; }
196: }
197:
198: $PREFORK=4; # number of children to maintain, at least four spare
199:
200: # ------------------------------------------------------------- Read hosts file
201:
202: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
203:
204: while ($configline=<CONFIG>) {
205: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
206: chomp($ip); $ip=~s/\D+$//;
207: $hostid{$ip}=$id;
208: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
209: $PREFORK++;
210: }
211: close(CONFIG);
212:
213: # establish SERVER socket, bind and listen.
214: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
215: Type => SOCK_STREAM,
216: Proto => 'tcp',
217: Reuse => 1,
218: Listen => 10 )
219: or die "making socket: $@\n";
220:
221: # --------------------------------------------------------- Do global variables
222:
223: # global variables
224:
225: $MAX_CLIENTS_PER_CHILD = 50; # number of clients each child should
226: # process
227: %children = (); # keys are current child process IDs
228: $children = 0; # current number of children
229:
230: sub REAPER { # takes care of dead children
231: $SIG{CHLD} = \&REAPER;
232: my $pid = wait;
233: if (defined($children{$pid})) {
234: &logthis("Child $pid died");
235: $children --;
236: delete $children{$pid};
237: } else {
238: &logthis("Unknown Child $pid died");
239: }
240: }
241:
242: sub HUNTSMAN { # signal handler for SIGINT
243: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
244: kill 'INT' => keys %children;
245: &logthis("Free socket: ".shutdown($server,2)); # free up socket
246: my $execdir=$perlvar{'lonDaemons'};
247: unlink("$execdir/logs/lond.pid");
248: &logthis("<font color=red>CRITICAL: Shutting down</font>");
249: exit; # clean up with dignity
250: }
251:
252: sub HUPSMAN { # signal handler for SIGHUP
253: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
254: kill 'INT' => keys %children;
255: &logthis("Free socket: ".shutdown($server,2)); # free up socket
256: &logthis("<font color=red>CRITICAL: Restarting</font>");
257: unlink("$execdir/logs/lond.pid");
258: my $execdir=$perlvar{'lonDaemons'};
259: exec("$execdir/lond"); # here we go again
260: }
261:
262: sub checkchildren {
263: &initnewstatus();
264: &logstatus();
265: &logthis('Going to check on the children');
266: $docdir=$perlvar{'lonDocRoot'};
267: foreach (sort keys %children) {
268: sleep 1;
269: unless (kill 'USR1' => $_) {
270: &logthis ('Child '.$_.' is dead');
271: &logstatus($$.' is dead');
272: }
273: }
274: sleep 5;
275: $SIG{ALRM} = sub { die "timeout" };
276: $SIG{__DIE__} = 'DEFAULT';
277: foreach (sort keys %children) {
278: unless (-e "$docdir/lon-status/londchld/$_.txt") {
279: eval {
280: alarm(300);
281: &logthis('Child '.$_.' did not respond');
282: kill 9 => $_;
283: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
284: $subj="LON: $perlvar{'lonHostID'} killed lond process $_";
285: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
286: $execdir=$perlvar{'lonDaemons'};
287: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
288: alarm(0);
289: }
290: }
291: }
292: $SIG{ALRM} = 'DEFAULT';
293: $SIG{__DIE__} = \&cathcexception;
294: }
295:
296: # --------------------------------------------------------------------- Logging
297:
298: sub logthis {
299: my $message=shift;
300: my $execdir=$perlvar{'lonDaemons'};
301: my $fh=IO::File->new(">>$execdir/logs/lond.log");
302: my $now=time;
303: my $local=localtime($now);
304: $lastlog=$local.': '.$message;
305: print $fh "$local ($$): $message\n";
306: }
307:
308: # ------------------------- Conditional log if $DEBUG true.
309: sub Debug {
310: my $message = shift;
311: if($DEBUG) {
312: &logthis($message);
313: }
314: }
315: # ------------------------------------------------------------------ Log status
316:
317: sub logstatus {
318: my $docdir=$perlvar{'lonDocRoot'};
319: {
320: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
321: print $fh $$."\t".$status."\t".$lastlog."\n";
322: $fh->close();
323: }
324: {
325: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
326: print $fh $status."\n".$lastlog."\n".time;
327: $fh->close();
328: }
329: }
330:
331: sub initnewstatus {
332: my $docdir=$perlvar{'lonDocRoot'};
333: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
334: my $now=time;
335: my $local=localtime($now);
336: print $fh "LOND status $local - parent $$\n\n";
337: opendir(DIR,"$docdir/lon-status/londchld");
338: while ($filename=readdir(DIR)) {
339: unlink("$docdir/lon-status/londchld/$filename");
340: }
341: closedir(DIR);
342: }
343:
344: # -------------------------------------------------------------- Status setting
345:
346: sub status {
347: my $what=shift;
348: my $now=time;
349: my $local=localtime($now);
350: $status=$local.': '.$what;
351: $0='lond: '.$what.' '.$local;
352: }
353:
354: # -------------------------------------------------------- Escape Special Chars
355:
356: sub escape {
357: my $str=shift;
358: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
359: return $str;
360: }
361:
362: # ----------------------------------------------------- Un-Escape Special Chars
363:
364: sub unescape {
365: my $str=shift;
366: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
367: return $str;
368: }
369:
370: # ----------------------------------------------------------- Send USR1 to lonc
371:
372: sub reconlonc {
373: my $peerfile=shift;
374: &logthis("Trying to reconnect for $peerfile");
375: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
376: if (my $fh=IO::File->new("$loncfile")) {
377: my $loncpid=<$fh>;
378: chomp($loncpid);
379: if (kill 0 => $loncpid) {
380: &logthis("lonc at pid $loncpid responding, sending USR1");
381: kill USR1 => $loncpid;
382: sleep 5;
383: if (-e "$peerfile") { return; }
384: &logthis("$peerfile still not there, give it another try");
385: sleep 10;
386: if (-e "$peerfile") { return; }
387: &logthis(
388: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
389: } else {
390: &logthis(
391: "<font color=red>CRITICAL: "
392: ."lonc at pid $loncpid not responding, giving up</font>");
393: }
394: } else {
395: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
396: }
397: }
398:
399: # -------------------------------------------------- Non-critical communication
400:
401: sub subreply {
402: my ($cmd,$server)=@_;
403: my $peerfile="$perlvar{'lonSockDir'}/$server";
404: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
405: Type => SOCK_STREAM,
406: Timeout => 10)
407: or return "con_lost";
408: print $sclient "$cmd\n";
409: my $answer=<$sclient>;
410: chomp($answer);
411: if (!$answer) { $answer="con_lost"; }
412: return $answer;
413: }
414:
415: sub reply {
416: my ($cmd,$server)=@_;
417: my $answer;
418: if ($server ne $perlvar{'lonHostID'}) {
419: $answer=subreply($cmd,$server);
420: if ($answer eq 'con_lost') {
421: $answer=subreply("ping",$server);
422: if ($answer ne $server) {
423: &logthis("sub reply: answer != server");
424: &reconlonc("$perlvar{'lonSockDir'}/$server");
425: }
426: $answer=subreply($cmd,$server);
427: }
428: } else {
429: $answer='self_reply';
430: }
431: return $answer;
432: }
433:
434: # -------------------------------------------------------------- Talk to lonsql
435:
436: sub sqlreply {
437: my ($cmd)=@_;
438: my $answer=subsqlreply($cmd);
439: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
440: return $answer;
441: }
442:
443: sub subsqlreply {
444: my ($cmd)=@_;
445: my $unixsock="mysqlsock";
446: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
447: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
448: Type => SOCK_STREAM,
449: Timeout => 10)
450: or return "con_lost";
451: print $sclient "$cmd\n";
452: my $answer=<$sclient>;
453: chomp($answer);
454: if (!$answer) { $answer="con_lost"; }
455: return $answer;
456: }
457:
458: # -------------------------------------------- Return path to profile directory
459:
460: sub propath {
461: my ($udom,$uname)=@_;
462: $udom=~s/\W//g;
463: $uname=~s/\W//g;
464: my $subdir=$uname.'__';
465: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
466: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
467: return $proname;
468: }
469:
470: # --------------------------------------- Is this the home server of an author?
471:
472: sub ishome {
473: my $author=shift;
474: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
475: my ($udom,$uname)=split(/\//,$author);
476: my $proname=propath($udom,$uname);
477: if (-e $proname) {
478: return 'owner';
479: } else {
480: return 'not_owner';
481: }
482: }
483:
484: # ======================================================= Continue main program
485: # ---------------------------------------------------- Fork once and dissociate
486:
487: $fpid=fork;
488: exit if $fpid;
489: die "Couldn't fork: $!" unless defined ($fpid);
490:
491: POSIX::setsid() or die "Can't start new session: $!";
492:
493: # ------------------------------------------------------- Write our PID on disk
494:
495: $execdir=$perlvar{'lonDaemons'};
496: open (PIDSAVE,">$execdir/logs/lond.pid");
497: print PIDSAVE "$$\n";
498: close(PIDSAVE);
499: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
500: &status('Starting');
501:
502: # ------------------------------------------------------- Now we are on our own
503:
504: # Fork off our children.
505: for (1 .. $PREFORK) {
506: make_new_child();
507: }
508:
509: # ----------------------------------------------------- Install signal handlers
510:
511: &status('Forked children');
512:
513: $SIG{CHLD} = \&REAPER;
514: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
515: $SIG{HUP} = \&HUPSMAN;
516: $SIG{USR1} = \&checkchildren;
517:
518: # And maintain the population.
519: while (1) {
520: &status('Sleeping');
521: sleep; # wait for a signal (i.e., child's death)
522: &logthis('Woke up');
523: &status('Woke up');
524: for ($i = $children; $i < $PREFORK; $i++) {
525: make_new_child(); # top up the child pool
526: }
527: }
528:
529: sub make_new_child {
530: my $pid;
531: my $cipher;
532: my $sigset;
533: &logthis("Attempting to start child");
534: # block signal for fork
535: $sigset = POSIX::SigSet->new(SIGINT);
536: sigprocmask(SIG_BLOCK, $sigset)
537: or die "Can't block SIGINT for fork: $!\n";
538:
539: die "fork: $!" unless defined ($pid = fork);
540:
541: if ($pid) {
542: # Parent records the child's birth and returns.
543: sigprocmask(SIG_UNBLOCK, $sigset)
544: or die "Can't unblock SIGINT for fork: $!\n";
545: $children{$pid} = 1;
546: $children++;
547: &status('Started child '.$pid);
548: return;
549: } else {
550: # Child can *not* return from this subroutine.
551: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
552: $SIG{USR1}= \&logstatus;
553: $SIG{ALRM}= \&timeout;
554: $lastlog='Forked ';
555: $status='Forked';
556:
557: # unblock signals
558: sigprocmask(SIG_UNBLOCK, $sigset)
559: or die "Can't unblock SIGINT for fork: $!\n";
560:
561: $tmpsnum=0;
562: #---------------------------------------------------- kerberos 5 initialization
563: &Authen::Krb5::init_context();
564: &Authen::Krb5::init_ets();
565:
566: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
567: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
568: &status('Idle, waiting for connection');
569: $client = $server->accept() or last;
570: &status('Accepted connection');
571: # =============================================================================
572: # do something with the connection
573: # -----------------------------------------------------------------------------
574: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
575: # connection liveness.
576: # see if we know client and check for spoof IP by challenge
577: my $caller=getpeername($client);
578: my ($port,$iaddr)=unpack_sockaddr_in($caller);
579: my $clientip=inet_ntoa($iaddr);
580: my $clientrec=($hostid{$clientip} ne undef);
581: &logthis(
582: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
583: );
584: &status("Connecting $clientip ($hostid{$clientip})");
585: my $clientok;
586: if ($clientrec) {
587: &status("Waiting for init from $clientip ($hostid{$clientip})");
588: my $remotereq=<$client>;
589: $remotereq=~s/\W//g;
590: if ($remotereq eq 'init') {
591: my $challenge="$$".time;
592: print $client "$challenge\n";
593: &status(
594: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
595: $remotereq=<$client>;
596: $remotereq=~s/\W//g;
597: if ($challenge eq $remotereq) {
598: $clientok=1;
599: print $client "ok\n";
600: } else {
601: &logthis(
602: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
603: &status('No challenge reply '.$clientip);
604: }
605: } else {
606: &logthis(
607: "<font color=blue>WARNING: "
608: ."$clientip failed to initialize: >$remotereq< </font>");
609: &status('No init '.$clientip);
610: }
611: } else {
612: &logthis(
613: "<font color=blue>WARNING: Unknown client $clientip</font>");
614: &status('Hung up on '.$clientip);
615: }
616: if ($clientok) {
617: # ---------------- New known client connecting, could mean machine online again
618:
619: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
620: &logthis(
621: "<font color=green>Established connection: $hostid{$clientip}</font>");
622: &status('Will listen to '.$hostid{$clientip});
623: # ------------------------------------------------------------ Process requests
624: while (my $userinput=<$client>) {
625: chomp($userinput);
626: Debug("Request = $userinput\n");
627: &status('Processing '.$hostid{$clientip}.': '.$userinput);
628: my $wasenc=0;
629: alarm(120);
630: # ------------------------------------------------------------ See if encrypted
631: if ($userinput =~ /^enc/) {
632: if ($cipher) {
633: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
634: $userinput='';
635: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
636: $userinput.=
637: $cipher->decrypt(
638: pack("H16",substr($encinput,$encidx,16))
639: );
640: }
641: $userinput=substr($userinput,0,$cmdlength);
642: $wasenc=1;
643: }
644: }
645:
646: # ------------------------------------------------------------- Normal commands
647: # ------------------------------------------------------------------------ ping
648: if ($userinput =~ /^ping/) {
649: print $client "$perlvar{'lonHostID'}\n";
650: # ------------------------------------------------------------------------ pong
651: } elsif ($userinput =~ /^pong/) {
652: $reply=reply("ping",$hostid{$clientip});
653: print $client "$perlvar{'lonHostID'}:$reply\n";
654: # ------------------------------------------------------------------------ ekey
655: } elsif ($userinput =~ /^ekey/) {
656: my $buildkey=time.$$.int(rand 100000);
657: $buildkey=~tr/1-6/A-F/;
658: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
659: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
660: $key=~tr/a-z/A-Z/;
661: $key=~tr/G-P/0-9/;
662: $key=~tr/Q-Z/0-9/;
663: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
664: $key=substr($key,0,32);
665: my $cipherkey=pack("H32",$key);
666: $cipher=new IDEA $cipherkey;
667: print $client "$buildkey\n";
668: # ------------------------------------------------------------------------ load
669: } elsif ($userinput =~ /^load/) {
670: my $loadavg;
671: {
672: my $loadfile=IO::File->new('/proc/loadavg');
673: $loadavg=<$loadfile>;
674: }
675: $loadavg =~ s/\s.*//g;
676: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
677: print $client "$loadpercent\n";
678: # ----------------------------------------------------------------- currentauth
679: } elsif ($userinput =~ /^currentauth/) {
680: if ($wasenc==1) {
681: my ($cmd,$udom,$uname)=split(/:/,$userinput);
682: my $result = GetAuthType($udom, $uname);
683: if($result eq "nouser") {
684: print $client "unknown_user\n";
685: }
686: else {
687: print $client "$result\n"
688: }
689: } else {
690: print $client "refused\n";
691: }
692: # ------------------------------------------------------------------------ auth
693: } elsif ($userinput =~ /^auth/) {
694: if ($wasenc==1) {
695: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
696: chomp($upass);
697: $upass=unescape($upass);
698: my $proname=propath($udom,$uname);
699: my $passfilename="$proname/passwd";
700: if (-e $passfilename) {
701: my $pf = IO::File->new($passfilename);
702: my $realpasswd=<$pf>;
703: chomp($realpasswd);
704: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
705: my $pwdcorrect=0;
706: if ($howpwd eq 'internal') {
707: &Debug("Internal auth");
708: $pwdcorrect=
709: (crypt($upass,$contentpwd) eq $contentpwd);
710: } elsif ($howpwd eq 'unix') {
711: &Debug("Unix auth");
712: if((getpwnam($uname))[1] eq "") { #no such user!
713: $pwdcorrect = 0;
714: } else {
715: $contentpwd=(getpwnam($uname))[1];
716: my $pwauth_path="/usr/local/sbin/pwauth";
717: unless ($contentpwd eq 'x') {
718: $pwdcorrect=
719: (crypt($upass,$contentpwd) eq
720: $contentpwd);
721: }
722:
723: elsif (-e $pwauth_path) {
724: open PWAUTH, "|$pwauth_path" or
725: die "Cannot invoke authentication";
726: print PWAUTH "$uname\n$upass\n";
727: close PWAUTH;
728: $pwdcorrect=!$?;
729: }
730: }
731: } elsif ($howpwd eq 'krb4') {
732: $null=pack("C",0);
733: unless ($upass=~/$null/) {
734: $pwdcorrect=(
735: Authen::Krb4::get_pw_in_tkt($uname,"",
736: $contentpwd,'krbtgt',$contentpwd,1,
737: $upass) == 0);
738: } else { $pwdcorrect=0; }
739: } elsif ($howpwd eq 'krb5') {
740: $null=pack("C",0);
741: unless ($upass=~/$null/) {
742: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
743: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
744: my $krbserver=&Authen::Krb5::parse_name($krbservice);
745: my $credentials=&Authen::Krb5::cc_default();
746: $credentials->initialize($krbclient);
747: my $krbreturn =
748: &Authen::Krb5::get_in_tkt_with_password(
749: $krbclient,$krbserver,$upass,$credentials);
750: # unless ($krbreturn) {
751: # &logthis("Krb5 Error: ".
752: # &Authen::Krb5::error());
753: # }
754: $pwdcorrect = ($krbreturn == 1);
755: } else { $pwdcorrect=0; }
756: } elsif ($howpwd eq 'localauth') {
757: $pwdcorrect=&localauth::localauth($uname,$upass,
758: $contentpwd);
759: }
760: if ($pwdcorrect) {
761: print $client "authorized\n";
762: } else {
763: print $client "non_authorized\n";
764: }
765: } else {
766: print $client "unknown_user\n";
767: }
768: } else {
769: print $client "refused\n";
770: }
771: # ---------------------------------------------------------------------- passwd
772: } elsif ($userinput =~ /^passwd/) {
773: if ($wasenc==1) {
774: my
775: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
776: chomp($npass);
777: $upass=&unescape($upass);
778: $npass=&unescape($npass);
779: &Debug("Trying to change password for $uname");
780: my $proname=propath($udom,$uname);
781: my $passfilename="$proname/passwd";
782: if (-e $passfilename) {
783: my $realpasswd;
784: { my $pf = IO::File->new($passfilename);
785: $realpasswd=<$pf>; }
786: chomp($realpasswd);
787: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
788: if ($howpwd eq 'internal') {
789: &Debug("internal auth");
790: if (crypt($upass,$contentpwd) eq $contentpwd) {
791: my $salt=time;
792: $salt=substr($salt,6,2);
793: my $ncpass=crypt($npass,$salt);
794: { my $pf = IO::File->new(">$passfilename");
795: print $pf "internal:$ncpass\n"; }
796: &logthis("Result of password change for $uname: pwchange_success");
797: print $client "ok\n";
798: } else {
799: print $client "non_authorized\n";
800: }
801: } elsif ($howpwd eq 'unix') {
802: # Unix means we have to access /etc/password
803: # one way or another.
804: # First: Make sure the current password is
805: # correct
806: &Debug("auth is unix");
807: $contentpwd=(getpwnam($uname))[1];
808: my $pwdcorrect = "0";
809: my $pwauth_path="/usr/local/sbin/pwauth";
810: unless ($contentpwd eq 'x') {
811: $pwdcorrect=
812: (crypt($upass,$contentpwd) eq $contentpwd);
813: } elsif (-e $pwauth_path) {
814: open PWAUTH, "|$pwauth_path" or
815: die "Cannot invoke authentication";
816: print PWAUTH "$uname\n$upass\n";
817: close PWAUTH;
818: &Debug("exited pwauth with $? ($uname,$upass) ");
819: $pwdcorrect=($? == 0);
820: }
821: if ($pwdcorrect) {
822: my $execdir=$perlvar{'lonDaemons'};
823: &Debug("Opening lcpasswd pipeline");
824: my $pf = IO::File->new("|$execdir/lcpasswd > /home/www/lcpasswd.log");
825: print $pf "$uname\n$npass\n$npass\n";
826: close $pf;
827: my $err = $?;
828: my $result = ($err>0 ? 'pwchange_failure'
829: : 'ok');
830: &logthis("Result of password change for $uname: ".
831: &lcpasswdstrerror($?));
832: print $client "$result\n";
833: } else {
834: print $client "non_authorized\n";
835: }
836: } else {
837: print $client "auth_mode_error\n";
838: }
839: } else {
840: print $client "unknown_user\n";
841: }
842: } else {
843: print $client "refused\n";
844: }
845: # -------------------------------------------------------------------- makeuser
846: } elsif ($userinput =~ /^makeuser/) {
847: &Debug("Make user received");
848: my $oldumask=umask(0077);
849: if ($wasenc==1) {
850: my
851: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
852: &Debug("cmd =".$cmd." $udom =".$udom.
853: " uname=".$uname);
854: chomp($npass);
855: $npass=&unescape($npass);
856: my $proname=propath($udom,$uname);
857: my $passfilename="$proname/passwd";
858: &Debug("Password file created will be:".
859: $passfilename);
860: if (-e $passfilename) {
861: print $client "already_exists\n";
862: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
863: print $client "not_right_domain\n";
864: } else {
865: @fpparts=split(/\//,$proname);
866: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
867: $fperror='';
868: for ($i=3;$i<=$#fpparts;$i++) {
869: $fpnow.='/'.$fpparts[$i];
870: unless (-e $fpnow) {
871: unless (mkdir($fpnow,0777)) {
872: $fperror="error:$!";
873: }
874: }
875: }
876: unless ($fperror) {
877: my $result=&make_passwd_file($uname, $umode,$npass,
878: $passfilename);
879: print $client $result;
880: } else {
881: print $client "$fperror\n";
882: }
883: }
884: } else {
885: print $client "refused\n";
886: }
887: umask($oldumask);
888: # -------------------------------------------------------------- changeuserauth
889: } elsif ($userinput =~ /^changeuserauth/) {
890: &Debug("Changing authorization");
891: if ($wasenc==1) {
892: my
893: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
894: chomp($npass);
895: &Debug("cmd = ".$cmd." domain= ".$udom.
896: "uname =".$uname." umode= ".$umode);
897: $npass=&unescape($npass);
898: my $proname=&propath($udom,$uname);
899: my $passfilename="$proname/passwd";
900: if ($udom ne $perlvar{'lonDefDomain'}) {
901: print $client "not_right_domain\n";
902: } else {
903: my $result=&make_passwd_file($uname, $umode,$npass,
904: $passfilename);
905: print $client $result;
906: }
907: } else {
908: print $client "refused\n";
909: }
910: # ------------------------------------------------------------------------ home
911: } elsif ($userinput =~ /^home/) {
912: my ($cmd,$udom,$uname)=split(/:/,$userinput);
913: chomp($uname);
914: my $proname=propath($udom,$uname);
915: if (-e $proname) {
916: print $client "found\n";
917: } else {
918: print $client "not_found\n";
919: }
920: # ---------------------------------------------------------------------- update
921: } elsif ($userinput =~ /^update/) {
922: my ($cmd,$fname)=split(/:/,$userinput);
923: my $ownership=ishome($fname);
924: if ($ownership eq 'not_owner') {
925: if (-e $fname) {
926: my ($dev,$ino,$mode,$nlink,
927: $uid,$gid,$rdev,$size,
928: $atime,$mtime,$ctime,
929: $blksize,$blocks)=stat($fname);
930: $now=time;
931: $since=$now-$atime;
932: if ($since>$perlvar{'lonExpire'}) {
933: $reply=
934: reply("unsub:$fname","$hostid{$clientip}");
935: unlink("$fname");
936: } else {
937: my $transname="$fname.in.transfer";
938: my $remoteurl=
939: reply("sub:$fname","$hostid{$clientip}");
940: my $response;
941: {
942: my $ua=new LWP::UserAgent;
943: my $request=new HTTP::Request('GET',"$remoteurl");
944: $response=$ua->request($request,$transname);
945: }
946: if ($response->is_error()) {
947: unlink($transname);
948: my $message=$response->status_line;
949: &logthis(
950: "LWP GET: $message for $fname ($remoteurl)");
951: } else {
952: if ($remoteurl!~/\.meta$/) {
953: my $ua=new LWP::UserAgent;
954: my $mrequest=
955: new HTTP::Request('GET',$remoteurl.'.meta');
956: my $mresponse=
957: $ua->request($mrequest,$fname.'.meta');
958: if ($mresponse->is_error()) {
959: unlink($fname.'.meta');
960: }
961: }
962: rename($transname,$fname);
963: }
964: }
965: print $client "ok\n";
966: } else {
967: print $client "not_found\n";
968: }
969: } else {
970: print $client "rejected\n";
971: }
972: # -------------------------------------- fetch a user file from a remote server
973: } elsif ($userinput =~ /^fetchuserfile/) {
974: my ($cmd,$fname)=split(/:/,$userinput);
975: my ($udom,$uname,$ufile)=split(/\//,$fname);
976: my $udir=propath($udom,$uname).'/userfiles';
977: unless (-e $udir) { mkdir($udir,0770); }
978: if (-e $udir) {
979: $ufile=~s/^[\.\~]+//;
980: $ufile=~s/\///g;
981: my $transname=$udir.'/'.$ufile;
982: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
983: my $response;
984: {
985: my $ua=new LWP::UserAgent;
986: my $request=new HTTP::Request('GET',"$remoteurl");
987: $response=$ua->request($request,$transname);
988: }
989: if ($response->is_error()) {
990: unlink($transname);
991: my $message=$response->status_line;
992: &logthis(
993: "LWP GET: $message for $fname ($remoteurl)");
994: print $client "failed\n";
995: } else {
996: print $client "ok\n";
997: }
998: } else {
999: print $client "not_home\n";
1000: }
1001: # ------------------------------------------ authenticate access to a user file
1002: } elsif ($userinput =~ /^tokenauthuserfile/) {
1003: my ($cmd,$fname,$session)=split(/:/,$userinput);
1004: chomp($session);
1005: $reply='non_auth';
1006: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1007: $session.'.id')) {
1008: while ($line=<ENVIN>) {
1009: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1010: }
1011: close(ENVIN);
1012: print $client $reply."\n";
1013: } else {
1014: print $client "invalid_token\n";
1015: }
1016: # ----------------------------------------------------------------- unsubscribe
1017: } elsif ($userinput =~ /^unsub/) {
1018: my ($cmd,$fname)=split(/:/,$userinput);
1019: if (-e $fname) {
1020: print $client &unsub($client,$fname,$clientip);
1021: } else {
1022: print $client "not_found\n";
1023: }
1024: # ------------------------------------------------------------------- subscribe
1025: } elsif ($userinput =~ /^sub/) {
1026: print $client &subscribe($userinput,$clientip);
1027: # ------------------------------------------------------------- current version
1028: } elsif ($userinput =~ /^currentversion/) {
1029: my ($cmd,$fname)=split(/:/,$userinput);
1030: print $client ¤tversion($fname)."\n";
1031: # ------------------------------------------------------------------------- log
1032: } elsif ($userinput =~ /^log/) {
1033: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1034: chomp($what);
1035: my $proname=propath($udom,$uname);
1036: my $now=time;
1037: {
1038: my $hfh;
1039: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1040: print $hfh "$now:$hostid{$clientip}:$what\n";
1041: print $client "ok\n";
1042: } else {
1043: print $client "error:$!\n";
1044: }
1045: }
1046: # ------------------------------------------------------------------------- put
1047: } elsif ($userinput =~ /^put/) {
1048: my ($cmd,$udom,$uname,$namespace,$what)
1049: =split(/:/,$userinput);
1050: $namespace=~s/\//\_/g;
1051: $namespace=~s/\W//g;
1052: if ($namespace ne 'roles') {
1053: chomp($what);
1054: my $proname=propath($udom,$uname);
1055: my $now=time;
1056: unless ($namespace=~/^nohist\_/) {
1057: my $hfh;
1058: if (
1059: $hfh=IO::File->new(">>$proname/$namespace.hist")
1060: ) { print $hfh "P:$now:$what\n"; }
1061: }
1062: my @pairs=split(/\&/,$what);
1063: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1064: foreach $pair (@pairs) {
1065: ($key,$value)=split(/=/,$pair);
1066: $hash{$key}=$value;
1067: }
1068: if (untie(%hash)) {
1069: print $client "ok\n";
1070: } else {
1071: print $client "error:$!\n";
1072: }
1073: } else {
1074: print $client "error:$!\n";
1075: }
1076: } else {
1077: print $client "refused\n";
1078: }
1079: # -------------------------------------------------------------------- rolesput
1080: } elsif ($userinput =~ /^rolesput/) {
1081: &Debug("rolesput");
1082: if ($wasenc==1) {
1083: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1084: =split(/:/,$userinput);
1085: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1086: "user = ".$exeuser." udom=".$udom.
1087: "what = ".$what);
1088: my $namespace='roles';
1089: chomp($what);
1090: my $proname=propath($udom,$uname);
1091: my $now=time;
1092: {
1093: my $hfh;
1094: if (
1095: $hfh=IO::File->new(">>$proname/$namespace.hist")
1096: ) {
1097: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1098: }
1099: }
1100: my @pairs=split(/\&/,$what);
1101: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1102: foreach $pair (@pairs) {
1103: ($key,$value)=split(/=/,$pair);
1104: &ManagePermissions($key, $udom, $uname,
1105: &GetAuthType( $udom,
1106: $uname));
1107: $hash{$key}=$value;
1108:
1109: }
1110: if (untie(%hash)) {
1111: print $client "ok\n";
1112: } else {
1113: print $client "error:$!\n";
1114: }
1115: } else {
1116: print $client "error:$!\n";
1117: }
1118: } else {
1119: print $client "refused\n";
1120: }
1121: # ------------------------------------------------------------------------- get
1122: } elsif ($userinput =~ /^get/) {
1123: my ($cmd,$udom,$uname,$namespace,$what)
1124: =split(/:/,$userinput);
1125: $namespace=~s/\//\_/g;
1126: $namespace=~s/\W//g;
1127: chomp($what);
1128: my @queries=split(/\&/,$what);
1129: my $proname=propath($udom,$uname);
1130: my $qresult='';
1131: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1132: for ($i=0;$i<=$#queries;$i++) {
1133: $qresult.="$hash{$queries[$i]}&";
1134: }
1135: if (untie(%hash)) {
1136: $qresult=~s/\&$//;
1137: print $client "$qresult\n";
1138: } else {
1139: print $client "error:$!\n";
1140: }
1141: } else {
1142: print $client "error:$!\n";
1143: }
1144: # ------------------------------------------------------------------------ eget
1145: } elsif ($userinput =~ /^eget/) {
1146: my ($cmd,$udom,$uname,$namespace,$what)
1147: =split(/:/,$userinput);
1148: $namespace=~s/\//\_/g;
1149: $namespace=~s/\W//g;
1150: chomp($what);
1151: my @queries=split(/\&/,$what);
1152: my $proname=propath($udom,$uname);
1153: my $qresult='';
1154: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1155: for ($i=0;$i<=$#queries;$i++) {
1156: $qresult.="$hash{$queries[$i]}&";
1157: }
1158: if (untie(%hash)) {
1159: $qresult=~s/\&$//;
1160: if ($cipher) {
1161: my $cmdlength=length($qresult);
1162: $qresult.=" ";
1163: my $encqresult='';
1164: for
1165: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1166: $encqresult.=
1167: unpack("H16",
1168: $cipher->encrypt(substr($qresult,$encidx,8)));
1169: }
1170: print $client "enc:$cmdlength:$encqresult\n";
1171: } else {
1172: print $client "error:no_key\n";
1173: }
1174: } else {
1175: print $client "error:$!\n";
1176: }
1177: } else {
1178: print $client "error:$!\n";
1179: }
1180: # ------------------------------------------------------------------------- del
1181: } elsif ($userinput =~ /^del/) {
1182: my ($cmd,$udom,$uname,$namespace,$what)
1183: =split(/:/,$userinput);
1184: $namespace=~s/\//\_/g;
1185: $namespace=~s/\W//g;
1186: chomp($what);
1187: my $proname=propath($udom,$uname);
1188: my $now=time;
1189: unless ($namespace=~/^nohist\_/) {
1190: my $hfh;
1191: if (
1192: $hfh=IO::File->new(">>$proname/$namespace.hist")
1193: ) { print $hfh "D:$now:$what\n"; }
1194: }
1195: my @keys=split(/\&/,$what);
1196: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1197: foreach $key (@keys) {
1198: delete($hash{$key});
1199: }
1200: if (untie(%hash)) {
1201: print $client "ok\n";
1202: } else {
1203: print $client "error:$!\n";
1204: }
1205: } else {
1206: print $client "error:$!\n";
1207: }
1208: # ------------------------------------------------------------------------ keys
1209: } elsif ($userinput =~ /^keys/) {
1210: my ($cmd,$udom,$uname,$namespace)
1211: =split(/:/,$userinput);
1212: $namespace=~s/\//\_/g;
1213: $namespace=~s/\W//g;
1214: my $proname=propath($udom,$uname);
1215: my $qresult='';
1216: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1217: foreach $key (keys %hash) {
1218: $qresult.="$key&";
1219: }
1220: if (untie(%hash)) {
1221: $qresult=~s/\&$//;
1222: print $client "$qresult\n";
1223: } else {
1224: print $client "error:$!\n";
1225: }
1226: } else {
1227: print $client "error:$!\n";
1228: }
1229: # ------------------------------------------------------------------------ dump
1230: } elsif ($userinput =~ /^dump/) {
1231: my ($cmd,$udom,$uname,$namespace,$regexp)
1232: =split(/:/,$userinput);
1233: $namespace=~s/\//\_/g;
1234: $namespace=~s/\W//g;
1235: if (defined($regexp)) {
1236: $regexp=&unescape($regexp);
1237: } else {
1238: $regexp='.';
1239: }
1240: my $qresult='';
1241: my $proname=propath($udom,$uname);
1242: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1243: study($regexp);
1244: while (($key,$value) = each(%hash)) {
1245: if ($regexp eq '.') {
1246: $qresult.=$key.'='.$value.'&';
1247: } else {
1248: my $unescapeKey = &unescape($key);
1249: if (eval('$unescapeKey=~/$regexp/')) {
1250: $qresult.="$key=$value&";
1251: }
1252: }
1253: }
1254: if (untie(%hash)) {
1255: chop($qresult);
1256: print $client "$qresult\n";
1257: } else {
1258: print $client "error:$!\n";
1259: }
1260: } else {
1261: print $client "error:$!\n";
1262: }
1263: # ----------------------------------------------------------------------- store
1264: } elsif ($userinput =~ /^store/) {
1265: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1266: =split(/:/,$userinput);
1267: $namespace=~s/\//\_/g;
1268: $namespace=~s/\W//g;
1269: if ($namespace ne 'roles') {
1270: chomp($what);
1271: my $proname=propath($udom,$uname);
1272: my $now=time;
1273: unless ($namespace=~/^nohist\_/) {
1274: my $hfh;
1275: if (
1276: $hfh=IO::File->new(">>$proname/$namespace.hist")
1277: ) { print $hfh "P:$now:$rid:$what\n"; }
1278: }
1279: my @pairs=split(/\&/,$what);
1280:
1281: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1282: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1283: my $key;
1284: $hash{"version:$rid"}++;
1285: my $version=$hash{"version:$rid"};
1286: my $allkeys='';
1287: foreach $pair (@pairs) {
1288: ($key,$value)=split(/=/,$pair);
1289: $allkeys.=$key.':';
1290: $hash{"$version:$rid:$key"}=$value;
1291: }
1292: $hash{"$version:$rid:timestamp"}=$now;
1293: $allkeys.='timestamp';
1294: $hash{"$version:keys:$rid"}=$allkeys;
1295: if (untie(%hash)) {
1296: print $client "ok\n";
1297: } else {
1298: print $client "error:$!\n";
1299: }
1300: } else {
1301: print $client "error:$!\n";
1302: }
1303: } else {
1304: print $client "refused\n";
1305: }
1306: # --------------------------------------------------------------------- restore
1307: } elsif ($userinput =~ /^restore/) {
1308: my ($cmd,$udom,$uname,$namespace,$rid)
1309: =split(/:/,$userinput);
1310: $namespace=~s/\//\_/g;
1311: $namespace=~s/\W//g;
1312: chomp($rid);
1313: my $proname=propath($udom,$uname);
1314: my $qresult='';
1315: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1316: my $version=$hash{"version:$rid"};
1317: $qresult.="version=$version&";
1318: my $scope;
1319: for ($scope=1;$scope<=$version;$scope++) {
1320: my $vkeys=$hash{"$scope:keys:$rid"};
1321: my @keys=split(/:/,$vkeys);
1322: my $key;
1323: $qresult.="$scope:keys=$vkeys&";
1324: foreach $key (@keys) {
1325: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1326: }
1327: }
1328: if (untie(%hash)) {
1329: $qresult=~s/\&$//;
1330: print $client "$qresult\n";
1331: } else {
1332: print $client "error:$!\n";
1333: }
1334: } else {
1335: print $client "error:$!\n";
1336: }
1337: # -------------------------------------------------------------------- chatsend
1338: } elsif ($userinput =~ /^chatsend/) {
1339: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1340: &chatadd($cdom,$cnum,$newpost);
1341: print $client "ok\n";
1342: # -------------------------------------------------------------------- chatretr
1343: } elsif ($userinput =~ /^chatretr/) {
1344: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1345: my $reply='';
1346: foreach (&getchat($cdom,$cnum)) {
1347: $reply.=&escape($_).':';
1348: }
1349: $reply=~s/\:$//;
1350: print $client $reply."\n";
1351: # ------------------------------------------------------------------- querysend
1352: } elsif ($userinput =~ /^querysend/) {
1353: my ($cmd,$query,
1354: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1355: $query=~s/\n*$//g;
1356: print $client "".
1357: sqlreply("$hostid{$clientip}\&$query".
1358: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1359: # ------------------------------------------------------------------ queryreply
1360: } elsif ($userinput =~ /^queryreply/) {
1361: my ($cmd,$id,$reply)=split(/:/,$userinput);
1362: my $store;
1363: my $execdir=$perlvar{'lonDaemons'};
1364: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1365: $reply=~s/\&/\n/g;
1366: print $store $reply;
1367: close $store;
1368: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1369: print $store2 "done\n";
1370: close $store2;
1371: print $client "ok\n";
1372: }
1373: else {
1374: print $client "error:$!\n";
1375: }
1376: # ----------------------------------------------------------------------- idput
1377: } elsif ($userinput =~ /^idput/) {
1378: my ($cmd,$udom,$what)=split(/:/,$userinput);
1379: chomp($what);
1380: $udom=~s/\W//g;
1381: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1382: my $now=time;
1383: {
1384: my $hfh;
1385: if (
1386: $hfh=IO::File->new(">>$proname.hist")
1387: ) { print $hfh "P:$now:$what\n"; }
1388: }
1389: my @pairs=split(/\&/,$what);
1390: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1391: foreach $pair (@pairs) {
1392: ($key,$value)=split(/=/,$pair);
1393: $hash{$key}=$value;
1394: }
1395: if (untie(%hash)) {
1396: print $client "ok\n";
1397: } else {
1398: print $client "error:$!\n";
1399: }
1400: } else {
1401: print $client "error:$!\n";
1402: }
1403: # ----------------------------------------------------------------------- idget
1404: } elsif ($userinput =~ /^idget/) {
1405: my ($cmd,$udom,$what)=split(/:/,$userinput);
1406: chomp($what);
1407: $udom=~s/\W//g;
1408: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1409: my @queries=split(/\&/,$what);
1410: my $qresult='';
1411: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1412: for ($i=0;$i<=$#queries;$i++) {
1413: $qresult.="$hash{$queries[$i]}&";
1414: }
1415: if (untie(%hash)) {
1416: $qresult=~s/\&$//;
1417: print $client "$qresult\n";
1418: } else {
1419: print $client "error:$!\n";
1420: }
1421: } else {
1422: print $client "error:$!\n";
1423: }
1424: # ---------------------------------------------------------------------- tmpput
1425: } elsif ($userinput =~ /^tmpput/) {
1426: my ($cmd,$what)=split(/:/,$userinput);
1427: my $store;
1428: $tmpsnum++;
1429: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1430: $id=~s/\W/\_/g;
1431: $what=~s/\n//g;
1432: my $execdir=$perlvar{'lonDaemons'};
1433: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1434: print $store $what;
1435: close $store;
1436: print $client "$id\n";
1437: }
1438: else {
1439: print $client "error:$!\n";
1440: }
1441:
1442: # ---------------------------------------------------------------------- tmpget
1443: } elsif ($userinput =~ /^tmpget/) {
1444: my ($cmd,$id)=split(/:/,$userinput);
1445: chomp($id);
1446: $id=~s/\W/\_/g;
1447: my $store;
1448: my $execdir=$perlvar{'lonDaemons'};
1449: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1450: my $reply=<$store>;
1451: print $client "$reply\n";
1452: close $store;
1453: }
1454: else {
1455: print $client "error:$!\n";
1456: }
1457:
1458: # -------------------------------------------------------------------------- ls
1459: } elsif ($userinput =~ /^ls/) {
1460: my ($cmd,$ulsdir)=split(/:/,$userinput);
1461: my $ulsout='';
1462: my $ulsfn;
1463: if (-e $ulsdir) {
1464: if(-d $ulsdir) {
1465: if (opendir(LSDIR,$ulsdir)) {
1466: while ($ulsfn=readdir(LSDIR)) {
1467: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1468: $ulsout.=$ulsfn.'&'.
1469: join('&',@ulsstats).':';
1470: }
1471: closedir(LSDIR);
1472: }
1473: } else {
1474: my @ulsstats=stat($ulsdir);
1475: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1476: }
1477: } else {
1478: $ulsout='no_such_dir';
1479: }
1480: if ($ulsout eq '') { $ulsout='empty'; }
1481: print $client "$ulsout\n";
1482: # ------------------------------------------------------------------ Hanging up
1483: } elsif (($userinput =~ /^exit/) ||
1484: ($userinput =~ /^init/)) {
1485: &logthis(
1486: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1487: print $client "bye\n";
1488: $client->close();
1489: last;
1490: # ------------------------------------------------------------- unknown command
1491: } else {
1492: # unknown command
1493: print $client "unknown_cmd\n";
1494: }
1495: # -------------------------------------------------------------------- complete
1496: alarm(0);
1497: &status('Listening to '.$hostid{$clientip});
1498: }
1499: # --------------------------------------------- client unknown or fishy, refuse
1500: } else {
1501: print $client "refused\n";
1502: $client->close();
1503: &logthis("<font color=blue>WARNING: "
1504: ."Rejected client $clientip, closing connection</font>");
1505: }
1506: }
1507:
1508: # =============================================================================
1509:
1510: &logthis("<font color=red>CRITICAL: "
1511: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1512: # tidy up gracefully and finish
1513:
1514: $server->close();
1515:
1516: # this exit is VERY important, otherwise the child will become
1517: # a producer of more and more children, forking yourself into
1518: # process death.
1519: exit;
1520: }
1521: }
1522:
1523:
1524: #
1525: # Checks to see if the input roleput request was to set
1526: # an author role. If so, invokes the lchtmldir script to set
1527: # up a correct public_html
1528: # Parameters:
1529: # request - The request sent to the rolesput subchunk.
1530: # We're looking for /domain/_au
1531: # domain - The domain in which the user is having roles doctored.
1532: # user - Name of the user for which the role is being put.
1533: # authtype - The authentication type associated with the user.
1534: #
1535: sub ManagePermissions
1536: {
1537: my $request = shift;
1538: my $domain = shift;
1539: my $user = shift;
1540: my $authtype= shift;
1541:
1542: # See if the request is of the form /$domain/_au
1543:
1544: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1545: my $execdir = $perlvar{'lonDaemons'};
1546: my $userhome= "/home/$user" ;
1547: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1548: system("$execdir/lchtmldir $userhome $user $authtype");
1549: }
1550: }
1551: #
1552: # GetAuthType - Determines the authorization type of a user in a domain.
1553:
1554: # Returns the authorization type or nouser if there is no such user.
1555: #
1556: sub GetAuthType
1557: {
1558: my $domain = shift;
1559: my $user = shift;
1560:
1561: Debug("GetAuthType( $domain, $user ) \n");
1562: my $proname = &propath($domain, $user);
1563: my $passwdfile = "$proname/passwd";
1564: if( -e $passwdfile ) {
1565: my $pf = IO::File->new($passwdfile);
1566: my $realpassword = <$pf>;
1567: chomp($realpassword);
1568: Debug("Password info = $realpassword\n");
1569: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1570: Debug("Authtype = $authtype, content = $contentpwd\n");
1571: my $availinfo = '';
1572: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1573: $availinfo = $contentpwd;
1574: }
1575:
1576: return "$authtype:$availinfo";
1577: }
1578: else {
1579: Debug("Returning nouser");
1580: return "nouser";
1581: }
1582: }
1583:
1584: sub addline {
1585: my ($fname,$hostid,$ip,$newline)=@_;
1586: my $contents;
1587: my $found=0;
1588: my $expr='^'.$hostid.':'.$ip.':';
1589: $expr =~ s/\./\\\./g;
1590: if ($sh=IO::File->new("$fname.subscription")) {
1591: while (my $subline=<$sh>) {
1592: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1593: }
1594: $sh->close();
1595: }
1596: $sh=IO::File->new(">$fname.subscription");
1597: if ($contents) { print $sh $contents; }
1598: if ($newline) { print $sh $newline; }
1599: $sh->close();
1600: return $found;
1601: }
1602:
1603: sub getchat {
1604: my ($cdom,$cname)=@_;
1605: my %hash;
1606: my $proname=&propath($cdom,$cname);
1607: my @entries=();
1608: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1609: &GDBM_READER(),0640)) {
1610: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1611: untie %hash;
1612: }
1613: return @entries;
1614: }
1615:
1616: sub chatadd {
1617: my ($cdom,$cname,$newchat)=@_;
1618: my %hash;
1619: my $proname=&propath($cdom,$cname);
1620: my @entries=();
1621: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1622: &GDBM_WRCREAT(),0640)) {
1623: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1624: my $time=time;
1625: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1626: my ($thentime,$idnum)=split(/\_/,$lastid);
1627: my $newid=$time.'_000000';
1628: if ($thentime==$time) {
1629: $idnum=~s/^0+//;
1630: $idnum++;
1631: $idnum=substr('000000'.$idnum,-6,6);
1632: $newid=$time.'_'.$idnum;
1633: }
1634: $hash{$newid}=$newchat;
1635: my $expired=$time-3600;
1636: foreach (keys %hash) {
1637: my ($thistime)=($_=~/(\d+)\_/);
1638: if ($thistime<$expired) {
1639: delete $hash{$_};
1640: }
1641: }
1642: untie %hash;
1643: }
1644: }
1645:
1646: sub unsub {
1647: my ($fname,$clientip)=@_;
1648: my $result;
1649: if (unlink("$fname.$hostid{$clientip}")) {
1650: $result="ok\n";
1651: } else {
1652: $result="not_subscribed\n";
1653: }
1654: if (-e "$fname.subscription") {
1655: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1656: if ($found) { $result="ok\n"; }
1657: } else {
1658: if ($result != "ok\n") { $result="not_subscribed\n"; }
1659: }
1660: return $result;
1661: }
1662:
1663: sub currentversion {
1664: my $fname=shift;
1665: my $version=-1;
1666: my $ulsdir='';
1667: if ($fname=~/^(.+)\/[^\/]+$/) {
1668: $ulsdir=$1;
1669: }
1670: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1671: $fname=~s/\.(\w+(?:\.meta)*)$/\.\(\\d\+\)\.$1\$/;
1672:
1673: if (-e $fname) { $version=1; }
1674: if (-e $ulsdir) {
1675: if(-d $ulsdir) {
1676: if (opendir(LSDIR,$ulsdir)) {
1677: while ($ulsfn=readdir(LSDIR)) {
1678: # see if this is a regular file (ignore links produced earlier)
1679: my $thisfile=$ulsdir.'/'.$ulsfn;
1680: unless (-l $thisfile) {
1681: if ($thisfile=~/$fname/) {
1682: if ($1>$version) { $version=$1; }
1683: }
1684: }
1685: }
1686: closedir(LSDIR);
1687: $version++;
1688: }
1689: }
1690: }
1691: return $version;
1692: }
1693:
1694: sub thisversion {
1695: my $fname=shift;
1696: my $version=-1;
1697: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1698: $version=$1;
1699: }
1700: return $version;
1701: }
1702:
1703: sub subscribe {
1704: my ($userinput,$clientip)=@_;
1705: my $result;
1706: my ($cmd,$fname)=split(/:/,$userinput);
1707: my $ownership=&ishome($fname);
1708: if ($ownership eq 'owner') {
1709: # explitly asking for the current version?
1710: unless (-e $fname) {
1711: my $currentversion=¤tversion($fname);
1712: if (&thisversion($fname)==$currentversion) {
1713: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1714: my $root=$1;
1715: my $extension=$2;
1716: symlink($root.'.'.$extension,
1717: $root.'.'.$currentversion.'.'.$extension);
1718: unless ($extension=~/\.meta$/) {
1719: symlink($root.'.'.$extension.'.meta',
1720: $root.'.'.$currentversion.'.'.$extension.'.meta');
1721: }
1722: }
1723: }
1724: }
1725: if (-e $fname) {
1726: if (-d $fname) {
1727: $result="directory\n";
1728: } else {
1729: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1730: $now=time;
1731: my $found=&addline($fname,$hostid{$clientip},$clientip,
1732: "$hostid{$clientip}:$clientip:$now\n");
1733: if ($found) { $result="$fname\n"; }
1734: # if they were subscribed to only meta data, delete that
1735: # subscription, when you subscribe to a file you also get
1736: # the metadata
1737: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1738: $fname=~s/\/home\/httpd\/html\/res/raw/;
1739: $fname="http://$thisserver/".$fname;
1740: $result="$fname\n";
1741: }
1742: } else {
1743: $result="not_found\n";
1744: }
1745: } else {
1746: $result="rejected\n";
1747: }
1748: return $result;
1749: }
1750:
1751: sub make_passwd_file {
1752: my ($uname, $umode,$npass,$passfilename)=@_;
1753: my $result="ok\n";
1754: if ($umode eq 'krb4' or $umode eq 'krb5') {
1755: {
1756: my $pf = IO::File->new(">$passfilename");
1757: print $pf "$umode:$npass\n";
1758: }
1759: } elsif ($umode eq 'internal') {
1760: my $salt=time;
1761: $salt=substr($salt,6,2);
1762: my $ncpass=crypt($npass,$salt);
1763: {
1764: &Debug("Creating internal auth");
1765: my $pf = IO::File->new(">$passfilename");
1766: print $pf "internal:$ncpass\n";
1767: }
1768: } elsif ($umode eq 'localauth') {
1769: {
1770: my $pf = IO::File->new(">$passfilename");
1771: print $pf "localauth:$npass\n";
1772: }
1773: } elsif ($umode eq 'unix') {
1774: {
1775: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1776: {
1777: &Debug("Executing external: ".$execpath);
1778: &Debug("user = ".$uname.", Password =". $npass);
1779: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
1780: print $se "$uname\n";
1781: print $se "$npass\n";
1782: print $se "$npass\n";
1783: }
1784: my $useraddok = $?;
1785: if($useraddok > 0) {
1786: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1787: }
1788: my $pf = IO::File->new(">$passfilename");
1789: print $pf "unix:\n";
1790: }
1791: } elsif ($umode eq 'none') {
1792: {
1793: my $pf = IO::File->new(">$passfilename");
1794: print $pf "none:\n";
1795: }
1796: } else {
1797: $result="auth_mode_error\n";
1798: }
1799: return $result;
1800: }
1801:
1802: # ----------------------------------- POD (plain old documentation, CPAN style)
1803:
1804: =head1 NAME
1805:
1806: lond - "LON Daemon" Server (port "LOND" 5663)
1807:
1808: =head1 SYNOPSIS
1809:
1810: Usage: B<lond>
1811:
1812: Should only be run as user=www. This is a command-line script which
1813: is invoked by B<loncron>. There is no expectation that a typical user
1814: will manually start B<lond> from the command-line. (In other words,
1815: DO NOT START B<lond> YOURSELF.)
1816:
1817: =head1 DESCRIPTION
1818:
1819: There are two characteristics associated with the running of B<lond>,
1820: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1821: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1822: subscriptions, etc). These are described in two large
1823: sections below.
1824:
1825: B<PROCESS MANAGEMENT>
1826:
1827: Preforker - server who forks first. Runs as a daemon. HUPs.
1828: Uses IDEA encryption
1829:
1830: B<lond> forks off children processes that correspond to the other servers
1831: in the network. Management of these processes can be done at the
1832: parent process level or the child process level.
1833:
1834: B<logs/lond.log> is the location of log messages.
1835:
1836: The process management is now explained in terms of linux shell commands,
1837: subroutines internal to this code, and signal assignments:
1838:
1839: =over 4
1840:
1841: =item *
1842:
1843: PID is stored in B<logs/lond.pid>
1844:
1845: This is the process id number of the parent B<lond> process.
1846:
1847: =item *
1848:
1849: SIGTERM and SIGINT
1850:
1851: Parent signal assignment:
1852: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1853:
1854: Child signal assignment:
1855: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1856: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1857: to restart a new child.)
1858:
1859: Command-line invocations:
1860: B<kill> B<-s> SIGTERM I<PID>
1861: B<kill> B<-s> SIGINT I<PID>
1862:
1863: Subroutine B<HUNTSMAN>:
1864: This is only invoked for the B<lond> parent I<PID>.
1865: This kills all the children, and then the parent.
1866: The B<lonc.pid> file is cleared.
1867:
1868: =item *
1869:
1870: SIGHUP
1871:
1872: Current bug:
1873: This signal can only be processed the first time
1874: on the parent process. Subsequent SIGHUP signals
1875: have no effect.
1876:
1877: Parent signal assignment:
1878: $SIG{HUP} = \&HUPSMAN;
1879:
1880: Child signal assignment:
1881: none (nothing happens)
1882:
1883: Command-line invocations:
1884: B<kill> B<-s> SIGHUP I<PID>
1885:
1886: Subroutine B<HUPSMAN>:
1887: This is only invoked for the B<lond> parent I<PID>,
1888: This kills all the children, and then the parent.
1889: The B<lond.pid> file is cleared.
1890:
1891: =item *
1892:
1893: SIGUSR1
1894:
1895: Parent signal assignment:
1896: $SIG{USR1} = \&USRMAN;
1897:
1898: Child signal assignment:
1899: $SIG{USR1}= \&logstatus;
1900:
1901: Command-line invocations:
1902: B<kill> B<-s> SIGUSR1 I<PID>
1903:
1904: Subroutine B<USRMAN>:
1905: When invoked for the B<lond> parent I<PID>,
1906: SIGUSR1 is sent to all the children, and the status of
1907: each connection is logged.
1908:
1909: =item *
1910:
1911: SIGCHLD
1912:
1913: Parent signal assignment:
1914: $SIG{CHLD} = \&REAPER;
1915:
1916: Child signal assignment:
1917: none
1918:
1919: Command-line invocations:
1920: B<kill> B<-s> SIGCHLD I<PID>
1921:
1922: Subroutine B<REAPER>:
1923: This is only invoked for the B<lond> parent I<PID>.
1924: Information pertaining to the child is removed.
1925: The socket port is cleaned up.
1926:
1927: =back
1928:
1929: B<SERVER-SIDE ACTIVITIES>
1930:
1931: Server-side information can be accepted in an encrypted or non-encrypted
1932: method.
1933:
1934: =over 4
1935:
1936: =item ping
1937:
1938: Query a client in the hosts.tab table; "Are you there?"
1939:
1940: =item pong
1941:
1942: Respond to a ping query.
1943:
1944: =item ekey
1945:
1946: Read in encrypted key, make cipher. Respond with a buildkey.
1947:
1948: =item load
1949:
1950: Respond with CPU load based on a computation upon /proc/loadavg.
1951:
1952: =item currentauth
1953:
1954: Reply with current authentication information (only over an
1955: encrypted channel).
1956:
1957: =item auth
1958:
1959: Only over an encrypted channel, reply as to whether a user's
1960: authentication information can be validated.
1961:
1962: =item passwd
1963:
1964: Allow for a password to be set.
1965:
1966: =item makeuser
1967:
1968: Make a user.
1969:
1970: =item passwd
1971:
1972: Allow for authentication mechanism and password to be changed.
1973:
1974: =item home
1975:
1976: Respond to a question "are you the home for a given user?"
1977:
1978: =item update
1979:
1980: Update contents of a subscribed resource.
1981:
1982: =item unsubscribe
1983:
1984: The server is unsubscribing from a resource.
1985:
1986: =item subscribe
1987:
1988: The server is subscribing to a resource.
1989:
1990: =item log
1991:
1992: Place in B<logs/lond.log>
1993:
1994: =item put
1995:
1996: stores hash in namespace
1997:
1998: =item rolesput
1999:
2000: put a role into a user's environment
2001:
2002: =item get
2003:
2004: returns hash with keys from array
2005: reference filled in from namespace
2006:
2007: =item eget
2008:
2009: returns hash with keys from array
2010: reference filled in from namesp (encrypts the return communication)
2011:
2012: =item rolesget
2013:
2014: get a role from a user's environment
2015:
2016: =item del
2017:
2018: deletes keys out of array from namespace
2019:
2020: =item keys
2021:
2022: returns namespace keys
2023:
2024: =item dump
2025:
2026: dumps the complete (or key matching regexp) namespace into a hash
2027:
2028: =item store
2029:
2030: stores hash permanently
2031: for this url; hashref needs to be given and should be a \%hashname; the
2032: remaining args aren't required and if they aren't passed or are '' they will
2033: be derived from the ENV
2034:
2035: =item restore
2036:
2037: returns a hash for a given url
2038:
2039: =item querysend
2040:
2041: Tells client about the lonsql process that has been launched in response
2042: to a sent query.
2043:
2044: =item queryreply
2045:
2046: Accept information from lonsql and make appropriate storage in temporary
2047: file space.
2048:
2049: =item idput
2050:
2051: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2052: for each student, defined perhaps by the institutional Registrar.)
2053:
2054: =item idget
2055:
2056: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2057: for each student, defined perhaps by the institutional Registrar.)
2058:
2059: =item tmpput
2060:
2061: Accept and store information in temporary space.
2062:
2063: =item tmpget
2064:
2065: Send along temporarily stored information.
2066:
2067: =item ls
2068:
2069: List part of a user's directory.
2070:
2071: =item Hanging up (exit or init)
2072:
2073: What to do when a client tells the server that they (the client)
2074: are leaving the network.
2075:
2076: =item unknown command
2077:
2078: If B<lond> is sent an unknown command (not in the list above),
2079: it replys to the client "unknown_cmd".
2080:
2081: =item UNKNOWN CLIENT
2082:
2083: If the anti-spoofing algorithm cannot verify the client,
2084: the client is rejected (with a "refused" message sent
2085: to the client, and the connection is closed.
2086:
2087: =back
2088:
2089: =head1 PREREQUISITES
2090:
2091: IO::Socket
2092: IO::File
2093: Apache::File
2094: Symbol
2095: POSIX
2096: Crypt::IDEA
2097: LWP::UserAgent()
2098: GDBM_File
2099: Authen::Krb4
2100: Authen::Krb5
2101:
2102: =head1 COREQUISITES
2103:
2104: =head1 OSNAMES
2105:
2106: linux
2107:
2108: =head1 SCRIPT CATEGORIES
2109:
2110: Server/Process
2111:
2112: =cut
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