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Mon Oct 7 13:50:36 2002 UTC (21 years, 6 months ago) by
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Toward bug 531.
Can address most recent version.
Can find out with lonnet::getversion what the most recent version is
Shows versions in lonmeta
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.102 2002/10/07 13:50:36 www Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
30: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
31: # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
32: # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
33: # 03/07,05/31 Gerd Kortemeyer
34: # 06/26 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($$.' is dead');
272: }
273: }
274: sleep 5;
275: foreach (sort keys %children) {
276: unless (-e "$docdir/lon-status/londchld/$_.txt") {
277: &logthis('Child '.$_.' did not respond');
278: kill 9 => $_;
279: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
280: $subj="LON: $perlvar{'lonHostID'} killed lond process $_";
281: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
282: $execdir=$perlvar{'lonDaemons'};
283: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`
284: }
285: }
286: }
287:
288: # --------------------------------------------------------------------- Logging
289:
290: sub logthis {
291: my $message=shift;
292: my $execdir=$perlvar{'lonDaemons'};
293: my $fh=IO::File->new(">>$execdir/logs/lond.log");
294: my $now=time;
295: my $local=localtime($now);
296: $lastlog=$local.': '.$message;
297: print $fh "$local ($$): $message\n";
298: }
299:
300: # ------------------------- Conditional log if $DEBUG true.
301: sub Debug {
302: my $message = shift;
303: if($DEBUG) {
304: &logthis($message);
305: }
306: }
307: # ------------------------------------------------------------------ Log status
308:
309: sub logstatus {
310: my $docdir=$perlvar{'lonDocRoot'};
311: {
312: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
313: print $fh $$."\t".$status."\t".$lastlog."\n";
314: $fh->close();
315: }
316: {
317: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
318: print $fh $status."\n".$lastlog."\n".time;
319: $fh->close();
320: }
321: }
322:
323: sub initnewstatus {
324: my $docdir=$perlvar{'lonDocRoot'};
325: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
326: my $now=time;
327: my $local=localtime($now);
328: print $fh "LOND status $local - parent $$\n\n";
329: opendir(DIR,"$docdir/lon-status/londchld");
330: while ($filename=readdir(DIR)) {
331: unlink("$docdir/lon-status/londchld/$filename");
332: }
333: closedir(DIR);
334: }
335:
336: # -------------------------------------------------------------- Status setting
337:
338: sub status {
339: my $what=shift;
340: my $now=time;
341: my $local=localtime($now);
342: $status=$local.': '.$what;
343: }
344:
345: # -------------------------------------------------------- Escape Special Chars
346:
347: sub escape {
348: my $str=shift;
349: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
350: return $str;
351: }
352:
353: # ----------------------------------------------------- Un-Escape Special Chars
354:
355: sub unescape {
356: my $str=shift;
357: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
358: return $str;
359: }
360:
361: # ----------------------------------------------------------- Send USR1 to lonc
362:
363: sub reconlonc {
364: my $peerfile=shift;
365: &logthis("Trying to reconnect for $peerfile");
366: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
367: if (my $fh=IO::File->new("$loncfile")) {
368: my $loncpid=<$fh>;
369: chomp($loncpid);
370: if (kill 0 => $loncpid) {
371: &logthis("lonc at pid $loncpid responding, sending USR1");
372: kill USR1 => $loncpid;
373: sleep 5;
374: if (-e "$peerfile") { return; }
375: &logthis("$peerfile still not there, give it another try");
376: sleep 10;
377: if (-e "$peerfile") { return; }
378: &logthis(
379: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
380: } else {
381: &logthis(
382: "<font color=red>CRITICAL: "
383: ."lonc at pid $loncpid not responding, giving up</font>");
384: }
385: } else {
386: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
387: }
388: }
389:
390: # -------------------------------------------------- Non-critical communication
391:
392: sub subreply {
393: my ($cmd,$server)=@_;
394: my $peerfile="$perlvar{'lonSockDir'}/$server";
395: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
396: Type => SOCK_STREAM,
397: Timeout => 10)
398: or return "con_lost";
399: print $sclient "$cmd\n";
400: my $answer=<$sclient>;
401: chomp($answer);
402: if (!$answer) { $answer="con_lost"; }
403: return $answer;
404: }
405:
406: sub reply {
407: my ($cmd,$server)=@_;
408: my $answer;
409: if ($server ne $perlvar{'lonHostID'}) {
410: $answer=subreply($cmd,$server);
411: if ($answer eq 'con_lost') {
412: $answer=subreply("ping",$server);
413: if ($answer ne $server) {
414: &logthis("sub reply: answer != server");
415: &reconlonc("$perlvar{'lonSockDir'}/$server");
416: }
417: $answer=subreply($cmd,$server);
418: }
419: } else {
420: $answer='self_reply';
421: }
422: return $answer;
423: }
424:
425: # -------------------------------------------------------------- Talk to lonsql
426:
427: sub sqlreply {
428: my ($cmd)=@_;
429: my $answer=subsqlreply($cmd);
430: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
431: return $answer;
432: }
433:
434: sub subsqlreply {
435: my ($cmd)=@_;
436: my $unixsock="mysqlsock";
437: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
438: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
439: Type => SOCK_STREAM,
440: Timeout => 10)
441: or return "con_lost";
442: print $sclient "$cmd\n";
443: my $answer=<$sclient>;
444: chomp($answer);
445: if (!$answer) { $answer="con_lost"; }
446: return $answer;
447: }
448:
449: # -------------------------------------------- Return path to profile directory
450:
451: sub propath {
452: my ($udom,$uname)=@_;
453: $udom=~s/\W//g;
454: $uname=~s/\W//g;
455: my $subdir=$uname.'__';
456: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
457: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
458: return $proname;
459: }
460:
461: # --------------------------------------- Is this the home server of an author?
462:
463: sub ishome {
464: my $author=shift;
465: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
466: my ($udom,$uname)=split(/\//,$author);
467: my $proname=propath($udom,$uname);
468: if (-e $proname) {
469: return 'owner';
470: } else {
471: return 'not_owner';
472: }
473: }
474:
475: # ======================================================= Continue main program
476: # ---------------------------------------------------- Fork once and dissociate
477:
478: $fpid=fork;
479: exit if $fpid;
480: die "Couldn't fork: $!" unless defined ($fpid);
481:
482: POSIX::setsid() or die "Can't start new session: $!";
483:
484: # ------------------------------------------------------- Write our PID on disk
485:
486: $execdir=$perlvar{'lonDaemons'};
487: open (PIDSAVE,">$execdir/logs/lond.pid");
488: print PIDSAVE "$$\n";
489: close(PIDSAVE);
490: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
491: &status('Starting');
492:
493: # ------------------------------------------------------- Now we are on our own
494:
495: # Fork off our children.
496: for (1 .. $PREFORK) {
497: make_new_child();
498: }
499:
500: # ----------------------------------------------------- Install signal handlers
501:
502: &status('Forked children');
503:
504: $SIG{CHLD} = \&REAPER;
505: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
506: $SIG{HUP} = \&HUPSMAN;
507: $SIG{USR1} = \&checkchildren;
508:
509: # And maintain the population.
510: while (1) {
511: &status('Sleeping');
512: sleep; # wait for a signal (i.e., child's death)
513: &logthis('Woke up');
514: &status('Woke up');
515: for ($i = $children; $i < $PREFORK; $i++) {
516: make_new_child(); # top up the child pool
517: }
518: }
519:
520: sub make_new_child {
521: my $pid;
522: my $cipher;
523: my $sigset;
524: &logthis("Attempting to start child");
525: # block signal for fork
526: $sigset = POSIX::SigSet->new(SIGINT);
527: sigprocmask(SIG_BLOCK, $sigset)
528: or die "Can't block SIGINT for fork: $!\n";
529:
530: die "fork: $!" unless defined ($pid = fork);
531:
532: if ($pid) {
533: # Parent records the child's birth and returns.
534: sigprocmask(SIG_UNBLOCK, $sigset)
535: or die "Can't unblock SIGINT for fork: $!\n";
536: $children{$pid} = 1;
537: $children++;
538: &status('Started child '.$pid);
539: return;
540: } else {
541: # Child can *not* return from this subroutine.
542: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
543: $SIG{USR1}= \&logstatus;
544: $SIG{ALRM}= \&timeout;
545: $lastlog='Forked ';
546: $status='Forked';
547:
548: # unblock signals
549: sigprocmask(SIG_UNBLOCK, $sigset)
550: or die "Can't unblock SIGINT for fork: $!\n";
551:
552: $tmpsnum=0;
553: #---------------------------------------------------- kerberos 5 initialization
554: &Authen::Krb5::init_context();
555: &Authen::Krb5::init_ets();
556:
557: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
558: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
559: &status('Idle, waiting for connection');
560: $client = $server->accept() or last;
561: &status('Accepted connection');
562: # =============================================================================
563: # do something with the connection
564: # -----------------------------------------------------------------------------
565: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
566: # connection liveness.
567: # see if we know client and check for spoof IP by challenge
568: my $caller=getpeername($client);
569: my ($port,$iaddr)=unpack_sockaddr_in($caller);
570: my $clientip=inet_ntoa($iaddr);
571: my $clientrec=($hostid{$clientip} ne undef);
572: &logthis(
573: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
574: );
575: &status("Connecting $clientip ($hostid{$clientip})");
576: my $clientok;
577: if ($clientrec) {
578: &status("Waiting for init from $clientip ($hostid{$clientip})");
579: my $remotereq=<$client>;
580: $remotereq=~s/\W//g;
581: if ($remotereq eq 'init') {
582: my $challenge="$$".time;
583: print $client "$challenge\n";
584: &status(
585: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
586: $remotereq=<$client>;
587: $remotereq=~s/\W//g;
588: if ($challenge eq $remotereq) {
589: $clientok=1;
590: print $client "ok\n";
591: } else {
592: &logthis(
593: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
594: &status('No challenge reply '.$clientip);
595: }
596: } else {
597: &logthis(
598: "<font color=blue>WARNING: "
599: ."$clientip failed to initialize: >$remotereq< </font>");
600: &status('No init '.$clientip);
601: }
602: } else {
603: &logthis(
604: "<font color=blue>WARNING: Unknown client $clientip</font>");
605: &status('Hung up on '.$clientip);
606: }
607: if ($clientok) {
608: # ---------------- New known client connecting, could mean machine online again
609:
610: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
611: &logthis(
612: "<font color=green>Established connection: $hostid{$clientip}</font>");
613: &status('Will listen to '.$hostid{$clientip});
614: # ------------------------------------------------------------ Process requests
615: while (my $userinput=<$client>) {
616: chomp($userinput);
617: Debug("Request = $userinput\n");
618: &status('Processing '.$hostid{$clientip}.': '.$userinput);
619: my $wasenc=0;
620: alarm(120);
621: # ------------------------------------------------------------ See if encrypted
622: if ($userinput =~ /^enc/) {
623: if ($cipher) {
624: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
625: $userinput='';
626: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
627: $userinput.=
628: $cipher->decrypt(
629: pack("H16",substr($encinput,$encidx,16))
630: );
631: }
632: $userinput=substr($userinput,0,$cmdlength);
633: $wasenc=1;
634: }
635: }
636:
637: # ------------------------------------------------------------- Normal commands
638: # ------------------------------------------------------------------------ ping
639: if ($userinput =~ /^ping/) {
640: print $client "$perlvar{'lonHostID'}\n";
641: # ------------------------------------------------------------------------ pong
642: } elsif ($userinput =~ /^pong/) {
643: $reply=reply("ping",$hostid{$clientip});
644: print $client "$perlvar{'lonHostID'}:$reply\n";
645: # ------------------------------------------------------------------------ ekey
646: } elsif ($userinput =~ /^ekey/) {
647: my $buildkey=time.$$.int(rand 100000);
648: $buildkey=~tr/1-6/A-F/;
649: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
650: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
651: $key=~tr/a-z/A-Z/;
652: $key=~tr/G-P/0-9/;
653: $key=~tr/Q-Z/0-9/;
654: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
655: $key=substr($key,0,32);
656: my $cipherkey=pack("H32",$key);
657: $cipher=new IDEA $cipherkey;
658: print $client "$buildkey\n";
659: # ------------------------------------------------------------------------ load
660: } elsif ($userinput =~ /^load/) {
661: my $loadavg;
662: {
663: my $loadfile=IO::File->new('/proc/loadavg');
664: $loadavg=<$loadfile>;
665: }
666: $loadavg =~ s/\s.*//g;
667: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
668: print $client "$loadpercent\n";
669: # ----------------------------------------------------------------- currentauth
670: } elsif ($userinput =~ /^currentauth/) {
671: if ($wasenc==1) {
672: my ($cmd,$udom,$uname)=split(/:/,$userinput);
673: my $result = GetAuthType($udom, $uname);
674: if($result eq "nouser") {
675: print $client "unknown_user\n";
676: }
677: else {
678: print $client "$result\n"
679: }
680: } else {
681: print $client "refused\n";
682: }
683: # ------------------------------------------------------------------------ auth
684: } elsif ($userinput =~ /^auth/) {
685: if ($wasenc==1) {
686: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
687: chomp($upass);
688: $upass=unescape($upass);
689: my $proname=propath($udom,$uname);
690: my $passfilename="$proname/passwd";
691: if (-e $passfilename) {
692: my $pf = IO::File->new($passfilename);
693: my $realpasswd=<$pf>;
694: chomp($realpasswd);
695: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
696: my $pwdcorrect=0;
697: if ($howpwd eq 'internal') {
698: &Debug("Internal auth");
699: $pwdcorrect=
700: (crypt($upass,$contentpwd) eq $contentpwd);
701: } elsif ($howpwd eq 'unix') {
702: &Debug("Unix auth");
703: if((getpwnam($uname))[1] eq "") { #no such user!
704: $pwdcorrect = 0;
705: } else {
706: $contentpwd=(getpwnam($uname))[1];
707: my $pwauth_path="/usr/local/sbin/pwauth";
708: unless ($contentpwd eq 'x') {
709: $pwdcorrect=
710: (crypt($upass,$contentpwd) eq
711: $contentpwd);
712: }
713:
714: elsif (-e $pwauth_path) {
715: open PWAUTH, "|$pwauth_path" or
716: die "Cannot invoke authentication";
717: print PWAUTH "$uname\n$upass\n";
718: close PWAUTH;
719: $pwdcorrect=!$?;
720: }
721: }
722: } elsif ($howpwd eq 'krb4') {
723: $null=pack("C",0);
724: unless ($upass=~/$null/) {
725: $pwdcorrect=(
726: Authen::Krb4::get_pw_in_tkt($uname,"",
727: $contentpwd,'krbtgt',$contentpwd,1,
728: $upass) == 0);
729: } else { $pwdcorrect=0; }
730: } elsif ($howpwd eq 'krb5') {
731: $null=pack("C",0);
732: unless ($upass=~/$null/) {
733: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
734: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
735: my $krbserver=&Authen::Krb5::parse_name($krbservice);
736: my $credentials=&Authen::Krb5::cc_default();
737: $credentials->initialize($krbclient);
738: my $krbreturn =
739: &Authen::Krb5::get_in_tkt_with_password(
740: $krbclient,$krbserver,$upass,$credentials);
741: # unless ($krbreturn) {
742: # &logthis("Krb5 Error: ".
743: # &Authen::Krb5::error());
744: # }
745: $pwdcorrect = ($krbreturn == 1);
746: } else { $pwdcorrect=0; }
747: } elsif ($howpwd eq 'localauth') {
748: $pwdcorrect=&localauth::localauth($uname,$upass,
749: $contentpwd);
750: }
751: if ($pwdcorrect) {
752: print $client "authorized\n";
753: } else {
754: print $client "non_authorized\n";
755: }
756: } else {
757: print $client "unknown_user\n";
758: }
759: } else {
760: print $client "refused\n";
761: }
762: # ---------------------------------------------------------------------- passwd
763: } elsif ($userinput =~ /^passwd/) {
764: if ($wasenc==1) {
765: my
766: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
767: chomp($npass);
768: $upass=&unescape($upass);
769: $npass=&unescape($npass);
770: &Debug("Trying to change password for $uname");
771: my $proname=propath($udom,$uname);
772: my $passfilename="$proname/passwd";
773: if (-e $passfilename) {
774: my $realpasswd;
775: { my $pf = IO::File->new($passfilename);
776: $realpasswd=<$pf>; }
777: chomp($realpasswd);
778: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
779: if ($howpwd eq 'internal') {
780: &Debug("internal auth");
781: if (crypt($upass,$contentpwd) eq $contentpwd) {
782: my $salt=time;
783: $salt=substr($salt,6,2);
784: my $ncpass=crypt($npass,$salt);
785: { my $pf = IO::File->new(">$passfilename");
786: print $pf "internal:$ncpass\n"; }
787: &logthis("Result of password change for $uname: pwchange_success");
788: print $client "ok\n";
789: } else {
790: print $client "non_authorized\n";
791: }
792: } elsif ($howpwd eq 'unix') {
793: # Unix means we have to access /etc/password
794: # one way or another.
795: # First: Make sure the current password is
796: # correct
797: &Debug("auth is unix");
798: $contentpwd=(getpwnam($uname))[1];
799: my $pwdcorrect = "0";
800: my $pwauth_path="/usr/local/sbin/pwauth";
801: unless ($contentpwd eq 'x') {
802: $pwdcorrect=
803: (crypt($upass,$contentpwd) eq $contentpwd);
804: } elsif (-e $pwauth_path) {
805: open PWAUTH, "|$pwauth_path" or
806: die "Cannot invoke authentication";
807: print PWAUTH "$uname\n$upass\n";
808: close PWAUTH;
809: &Debug("exited pwauth with $? ($uname,$upass) ");
810: $pwdcorrect=($? == 0);
811: }
812: if ($pwdcorrect) {
813: my $execdir=$perlvar{'lonDaemons'};
814: &Debug("Opening lcpasswd pipeline");
815: my $pf = IO::File->new("|$execdir/lcpasswd > /home/www/lcpasswd.log");
816: print $pf "$uname\n$npass\n$npass\n";
817: close $pf;
818: my $err = $?;
819: my $result = ($err>0 ? 'pwchange_failure'
820: : 'ok');
821: &logthis("Result of password change for $uname: ".
822: &lcpasswdstrerror($?));
823: print $client "$result\n";
824: } else {
825: print $client "non_authorized\n";
826: }
827: } else {
828: print $client "auth_mode_error\n";
829: }
830: } else {
831: print $client "unknown_user\n";
832: }
833: } else {
834: print $client "refused\n";
835: }
836: # -------------------------------------------------------------------- makeuser
837: } elsif ($userinput =~ /^makeuser/) {
838: &Debug("Make user received");
839: my $oldumask=umask(0077);
840: if ($wasenc==1) {
841: my
842: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
843: &Debug("cmd =".$cmd." $udom =".$udom.
844: " uname=".$uname);
845: chomp($npass);
846: $npass=&unescape($npass);
847: my $proname=propath($udom,$uname);
848: my $passfilename="$proname/passwd";
849: &Debug("Password file created will be:".
850: $passfilename);
851: if (-e $passfilename) {
852: print $client "already_exists\n";
853: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
854: print $client "not_right_domain\n";
855: } else {
856: @fpparts=split(/\//,$proname);
857: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
858: $fperror='';
859: for ($i=3;$i<=$#fpparts;$i++) {
860: $fpnow.='/'.$fpparts[$i];
861: unless (-e $fpnow) {
862: unless (mkdir($fpnow,0777)) {
863: $fperror="error:$!";
864: }
865: }
866: }
867: unless ($fperror) {
868: my $result=&make_passwd_file($uname, $umode,$npass,
869: $passfilename);
870: print $client $result;
871: } else {
872: print $client "$fperror\n";
873: }
874: }
875: } else {
876: print $client "refused\n";
877: }
878: umask($oldumask);
879: # -------------------------------------------------------------- changeuserauth
880: } elsif ($userinput =~ /^changeuserauth/) {
881: &Debug("Changing authorization");
882: if ($wasenc==1) {
883: my
884: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
885: chomp($npass);
886: &Debug("cmd = ".$cmd." domain= ".$udom.
887: "uname =".$uname." umode= ".$umode);
888: $npass=&unescape($npass);
889: my $proname=&propath($udom,$uname);
890: my $passfilename="$proname/passwd";
891: if ($udom ne $perlvar{'lonDefDomain'}) {
892: print $client "not_right_domain\n";
893: } else {
894: my $result=&make_passwd_file($uname, $umode,$npass,
895: $passfilename);
896: print $client $result;
897: }
898: } else {
899: print $client "refused\n";
900: }
901: # ------------------------------------------------------------------------ home
902: } elsif ($userinput =~ /^home/) {
903: my ($cmd,$udom,$uname)=split(/:/,$userinput);
904: chomp($uname);
905: my $proname=propath($udom,$uname);
906: if (-e $proname) {
907: print $client "found\n";
908: } else {
909: print $client "not_found\n";
910: }
911: # ---------------------------------------------------------------------- update
912: } elsif ($userinput =~ /^update/) {
913: my ($cmd,$fname)=split(/:/,$userinput);
914: my $ownership=ishome($fname);
915: if ($ownership eq 'not_owner') {
916: if (-e $fname) {
917: my ($dev,$ino,$mode,$nlink,
918: $uid,$gid,$rdev,$size,
919: $atime,$mtime,$ctime,
920: $blksize,$blocks)=stat($fname);
921: $now=time;
922: $since=$now-$atime;
923: if ($since>$perlvar{'lonExpire'}) {
924: $reply=
925: reply("unsub:$fname","$hostid{$clientip}");
926: unlink("$fname");
927: } else {
928: my $transname="$fname.in.transfer";
929: my $remoteurl=
930: reply("sub:$fname","$hostid{$clientip}");
931: my $response;
932: {
933: my $ua=new LWP::UserAgent;
934: my $request=new HTTP::Request('GET',"$remoteurl");
935: $response=$ua->request($request,$transname);
936: }
937: if ($response->is_error()) {
938: unlink($transname);
939: my $message=$response->status_line;
940: &logthis(
941: "LWP GET: $message for $fname ($remoteurl)");
942: } else {
943: if ($remoteurl!~/\.meta$/) {
944: my $ua=new LWP::UserAgent;
945: my $mrequest=
946: new HTTP::Request('GET',$remoteurl.'.meta');
947: my $mresponse=
948: $ua->request($mrequest,$fname.'.meta');
949: if ($mresponse->is_error()) {
950: unlink($fname.'.meta');
951: }
952: }
953: rename($transname,$fname);
954: }
955: }
956: print $client "ok\n";
957: } else {
958: print $client "not_found\n";
959: }
960: } else {
961: print $client "rejected\n";
962: }
963: # -------------------------------------- fetch a user file from a remote server
964: } elsif ($userinput =~ /^fetchuserfile/) {
965: my ($cmd,$fname)=split(/:/,$userinput);
966: my ($udom,$uname,$ufile)=split(/\//,$fname);
967: my $udir=propath($udom,$uname).'/userfiles';
968: unless (-e $udir) { mkdir($udir,0770); }
969: if (-e $udir) {
970: $ufile=~s/^[\.\~]+//;
971: $ufile=~s/\///g;
972: my $transname=$udir.'/'.$ufile;
973: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
974: my $response;
975: {
976: my $ua=new LWP::UserAgent;
977: my $request=new HTTP::Request('GET',"$remoteurl");
978: $response=$ua->request($request,$transname);
979: }
980: if ($response->is_error()) {
981: unlink($transname);
982: my $message=$response->status_line;
983: &logthis(
984: "LWP GET: $message for $fname ($remoteurl)");
985: print $client "failed\n";
986: } else {
987: print $client "ok\n";
988: }
989: } else {
990: print $client "not_home\n";
991: }
992: # ------------------------------------------ authenticate access to a user file
993: } elsif ($userinput =~ /^tokenauthuserfile/) {
994: my ($cmd,$fname,$session)=split(/:/,$userinput);
995: chomp($session);
996: $reply='non_auth';
997: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
998: $session.'.id')) {
999: while ($line=<ENVIN>) {
1000: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1001: }
1002: close(ENVIN);
1003: print $client $reply."\n";
1004: } else {
1005: print $client "invalid_token\n";
1006: }
1007: # ----------------------------------------------------------------- unsubscribe
1008: } elsif ($userinput =~ /^unsub/) {
1009: my ($cmd,$fname)=split(/:/,$userinput);
1010: if (-e $fname) {
1011: print $client &unsub($client,$fname,$clientip);
1012: } else {
1013: print $client "not_found\n";
1014: }
1015: # ------------------------------------------------------------------- subscribe
1016: } elsif ($userinput =~ /^sub/) {
1017: print $client &subscribe($userinput,$clientip);
1018: # ------------------------------------------------------------- current version
1019: } elsif ($userinput =~ /^currentversion/) {
1020: my ($cmd,$fname)=split(/:/,$userinput);
1021: print $client ¤tversion($fname)."\n";
1022: # ------------------------------------------------------------------------- log
1023: } elsif ($userinput =~ /^log/) {
1024: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1025: chomp($what);
1026: my $proname=propath($udom,$uname);
1027: my $now=time;
1028: {
1029: my $hfh;
1030: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1031: print $hfh "$now:$hostid{$clientip}:$what\n";
1032: print $client "ok\n";
1033: } else {
1034: print $client "error:$!\n";
1035: }
1036: }
1037: # ------------------------------------------------------------------------- put
1038: } elsif ($userinput =~ /^put/) {
1039: my ($cmd,$udom,$uname,$namespace,$what)
1040: =split(/:/,$userinput);
1041: $namespace=~s/\//\_/g;
1042: $namespace=~s/\W//g;
1043: if ($namespace ne 'roles') {
1044: chomp($what);
1045: my $proname=propath($udom,$uname);
1046: my $now=time;
1047: unless ($namespace=~/^nohist\_/) {
1048: my $hfh;
1049: if (
1050: $hfh=IO::File->new(">>$proname/$namespace.hist")
1051: ) { print $hfh "P:$now:$what\n"; }
1052: }
1053: my @pairs=split(/\&/,$what);
1054: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1055: foreach $pair (@pairs) {
1056: ($key,$value)=split(/=/,$pair);
1057: $hash{$key}=$value;
1058: }
1059: if (untie(%hash)) {
1060: print $client "ok\n";
1061: } else {
1062: print $client "error:$!\n";
1063: }
1064: } else {
1065: print $client "error:$!\n";
1066: }
1067: } else {
1068: print $client "refused\n";
1069: }
1070: # -------------------------------------------------------------------- rolesput
1071: } elsif ($userinput =~ /^rolesput/) {
1072: &Debug("rolesput");
1073: if ($wasenc==1) {
1074: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1075: =split(/:/,$userinput);
1076: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1077: "user = ".$exeuser." udom=".$udom.
1078: "what = ".$what);
1079: my $namespace='roles';
1080: chomp($what);
1081: my $proname=propath($udom,$uname);
1082: my $now=time;
1083: {
1084: my $hfh;
1085: if (
1086: $hfh=IO::File->new(">>$proname/$namespace.hist")
1087: ) {
1088: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1089: }
1090: }
1091: my @pairs=split(/\&/,$what);
1092: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1093: foreach $pair (@pairs) {
1094: ($key,$value)=split(/=/,$pair);
1095: &ManagePermissions($key, $udom, $uname,
1096: &GetAuthType( $udom,
1097: $uname));
1098: $hash{$key}=$value;
1099:
1100: }
1101: if (untie(%hash)) {
1102: print $client "ok\n";
1103: } else {
1104: print $client "error:$!\n";
1105: }
1106: } else {
1107: print $client "error:$!\n";
1108: }
1109: } else {
1110: print $client "refused\n";
1111: }
1112: # ------------------------------------------------------------------------- get
1113: } elsif ($userinput =~ /^get/) {
1114: my ($cmd,$udom,$uname,$namespace,$what)
1115: =split(/:/,$userinput);
1116: $namespace=~s/\//\_/g;
1117: $namespace=~s/\W//g;
1118: chomp($what);
1119: my @queries=split(/\&/,$what);
1120: my $proname=propath($udom,$uname);
1121: my $qresult='';
1122: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1123: for ($i=0;$i<=$#queries;$i++) {
1124: $qresult.="$hash{$queries[$i]}&";
1125: }
1126: if (untie(%hash)) {
1127: $qresult=~s/\&$//;
1128: print $client "$qresult\n";
1129: } else {
1130: print $client "error:$!\n";
1131: }
1132: } else {
1133: print $client "error:$!\n";
1134: }
1135: # ------------------------------------------------------------------------ eget
1136: } elsif ($userinput =~ /^eget/) {
1137: my ($cmd,$udom,$uname,$namespace,$what)
1138: =split(/:/,$userinput);
1139: $namespace=~s/\//\_/g;
1140: $namespace=~s/\W//g;
1141: chomp($what);
1142: my @queries=split(/\&/,$what);
1143: my $proname=propath($udom,$uname);
1144: my $qresult='';
1145: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1146: for ($i=0;$i<=$#queries;$i++) {
1147: $qresult.="$hash{$queries[$i]}&";
1148: }
1149: if (untie(%hash)) {
1150: $qresult=~s/\&$//;
1151: if ($cipher) {
1152: my $cmdlength=length($qresult);
1153: $qresult.=" ";
1154: my $encqresult='';
1155: for
1156: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1157: $encqresult.=
1158: unpack("H16",
1159: $cipher->encrypt(substr($qresult,$encidx,8)));
1160: }
1161: print $client "enc:$cmdlength:$encqresult\n";
1162: } else {
1163: print $client "error:no_key\n";
1164: }
1165: } else {
1166: print $client "error:$!\n";
1167: }
1168: } else {
1169: print $client "error:$!\n";
1170: }
1171: # ------------------------------------------------------------------------- del
1172: } elsif ($userinput =~ /^del/) {
1173: my ($cmd,$udom,$uname,$namespace,$what)
1174: =split(/:/,$userinput);
1175: $namespace=~s/\//\_/g;
1176: $namespace=~s/\W//g;
1177: chomp($what);
1178: my $proname=propath($udom,$uname);
1179: my $now=time;
1180: unless ($namespace=~/^nohist\_/) {
1181: my $hfh;
1182: if (
1183: $hfh=IO::File->new(">>$proname/$namespace.hist")
1184: ) { print $hfh "D:$now:$what\n"; }
1185: }
1186: my @keys=split(/\&/,$what);
1187: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1188: foreach $key (@keys) {
1189: delete($hash{$key});
1190: }
1191: if (untie(%hash)) {
1192: print $client "ok\n";
1193: } else {
1194: print $client "error:$!\n";
1195: }
1196: } else {
1197: print $client "error:$!\n";
1198: }
1199: # ------------------------------------------------------------------------ keys
1200: } elsif ($userinput =~ /^keys/) {
1201: my ($cmd,$udom,$uname,$namespace)
1202: =split(/:/,$userinput);
1203: $namespace=~s/\//\_/g;
1204: $namespace=~s/\W//g;
1205: my $proname=propath($udom,$uname);
1206: my $qresult='';
1207: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1208: foreach $key (keys %hash) {
1209: $qresult.="$key&";
1210: }
1211: if (untie(%hash)) {
1212: $qresult=~s/\&$//;
1213: print $client "$qresult\n";
1214: } else {
1215: print $client "error:$!\n";
1216: }
1217: } else {
1218: print $client "error:$!\n";
1219: }
1220: # ------------------------------------------------------------------------ dump
1221: } elsif ($userinput =~ /^dump/) {
1222: my ($cmd,$udom,$uname,$namespace,$regexp)
1223: =split(/:/,$userinput);
1224: $namespace=~s/\//\_/g;
1225: $namespace=~s/\W//g;
1226: if (defined($regexp)) {
1227: $regexp=&unescape($regexp);
1228: } else {
1229: $regexp='.';
1230: }
1231: my $qresult='';
1232: my $proname=propath($udom,$uname);
1233: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1234: study($regexp);
1235: while (($key,$value) = each(%hash)) {
1236: if ($regexp eq '.') {
1237: $qresult.=$key.'='.$value.'&';
1238: } else {
1239: my $unescapeKey = &unescape($key);
1240: if (eval('$unescapeKey=~/$regexp/')) {
1241: $qresult.="$key=$value&";
1242: }
1243: }
1244: }
1245: if (untie(%hash)) {
1246: chop($qresult);
1247: print $client "$qresult\n";
1248: } else {
1249: print $client "error:$!\n";
1250: }
1251: } else {
1252: print $client "error:$!\n";
1253: }
1254: # ----------------------------------------------------------------------- store
1255: } elsif ($userinput =~ /^store/) {
1256: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1257: =split(/:/,$userinput);
1258: $namespace=~s/\//\_/g;
1259: $namespace=~s/\W//g;
1260: if ($namespace ne 'roles') {
1261: chomp($what);
1262: my $proname=propath($udom,$uname);
1263: my $now=time;
1264: unless ($namespace=~/^nohist\_/) {
1265: my $hfh;
1266: if (
1267: $hfh=IO::File->new(">>$proname/$namespace.hist")
1268: ) { print $hfh "P:$now:$rid:$what\n"; }
1269: }
1270: my @pairs=split(/\&/,$what);
1271:
1272: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1273: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1274: my $key;
1275: $hash{"version:$rid"}++;
1276: my $version=$hash{"version:$rid"};
1277: my $allkeys='';
1278: foreach $pair (@pairs) {
1279: ($key,$value)=split(/=/,$pair);
1280: $allkeys.=$key.':';
1281: $hash{"$version:$rid:$key"}=$value;
1282: }
1283: $hash{"$version:$rid:timestamp"}=$now;
1284: $allkeys.='timestamp';
1285: $hash{"$version:keys:$rid"}=$allkeys;
1286: if (untie(%hash)) {
1287: print $client "ok\n";
1288: } else {
1289: print $client "error:$!\n";
1290: }
1291: } else {
1292: print $client "error:$!\n";
1293: }
1294: } else {
1295: print $client "refused\n";
1296: }
1297: # --------------------------------------------------------------------- restore
1298: } elsif ($userinput =~ /^restore/) {
1299: my ($cmd,$udom,$uname,$namespace,$rid)
1300: =split(/:/,$userinput);
1301: $namespace=~s/\//\_/g;
1302: $namespace=~s/\W//g;
1303: chomp($rid);
1304: my $proname=propath($udom,$uname);
1305: my $qresult='';
1306: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1307: my $version=$hash{"version:$rid"};
1308: $qresult.="version=$version&";
1309: my $scope;
1310: for ($scope=1;$scope<=$version;$scope++) {
1311: my $vkeys=$hash{"$scope:keys:$rid"};
1312: my @keys=split(/:/,$vkeys);
1313: my $key;
1314: $qresult.="$scope:keys=$vkeys&";
1315: foreach $key (@keys) {
1316: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1317: }
1318: }
1319: if (untie(%hash)) {
1320: $qresult=~s/\&$//;
1321: print $client "$qresult\n";
1322: } else {
1323: print $client "error:$!\n";
1324: }
1325: } else {
1326: print $client "error:$!\n";
1327: }
1328: # -------------------------------------------------------------------- chatsend
1329: } elsif ($userinput =~ /^chatsend/) {
1330: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1331: &chatadd($cdom,$cnum,$newpost);
1332: print $client "ok\n";
1333: # -------------------------------------------------------------------- chatretr
1334: } elsif ($userinput =~ /^chatretr/) {
1335: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1336: my $reply='';
1337: foreach (&getchat($cdom,$cnum)) {
1338: $reply.=&escape($_).':';
1339: }
1340: $reply=~s/\:$//;
1341: print $client $reply."\n";
1342: # ------------------------------------------------------------------- querysend
1343: } elsif ($userinput =~ /^querysend/) {
1344: my ($cmd,$query,
1345: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1346: $query=~s/\n*$//g;
1347: print $client "".
1348: sqlreply("$hostid{$clientip}\&$query".
1349: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1350: # ------------------------------------------------------------------ queryreply
1351: } elsif ($userinput =~ /^queryreply/) {
1352: my ($cmd,$id,$reply)=split(/:/,$userinput);
1353: my $store;
1354: my $execdir=$perlvar{'lonDaemons'};
1355: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1356: $reply=~s/\&/\n/g;
1357: print $store $reply;
1358: close $store;
1359: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1360: print $store2 "done\n";
1361: close $store2;
1362: print $client "ok\n";
1363: }
1364: else {
1365: print $client "error:$!\n";
1366: }
1367: # ----------------------------------------------------------------------- idput
1368: } elsif ($userinput =~ /^idput/) {
1369: my ($cmd,$udom,$what)=split(/:/,$userinput);
1370: chomp($what);
1371: $udom=~s/\W//g;
1372: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1373: my $now=time;
1374: {
1375: my $hfh;
1376: if (
1377: $hfh=IO::File->new(">>$proname.hist")
1378: ) { print $hfh "P:$now:$what\n"; }
1379: }
1380: my @pairs=split(/\&/,$what);
1381: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1382: foreach $pair (@pairs) {
1383: ($key,$value)=split(/=/,$pair);
1384: $hash{$key}=$value;
1385: }
1386: if (untie(%hash)) {
1387: print $client "ok\n";
1388: } else {
1389: print $client "error:$!\n";
1390: }
1391: } else {
1392: print $client "error:$!\n";
1393: }
1394: # ----------------------------------------------------------------------- idget
1395: } elsif ($userinput =~ /^idget/) {
1396: my ($cmd,$udom,$what)=split(/:/,$userinput);
1397: chomp($what);
1398: $udom=~s/\W//g;
1399: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1400: my @queries=split(/\&/,$what);
1401: my $qresult='';
1402: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1403: for ($i=0;$i<=$#queries;$i++) {
1404: $qresult.="$hash{$queries[$i]}&";
1405: }
1406: if (untie(%hash)) {
1407: $qresult=~s/\&$//;
1408: print $client "$qresult\n";
1409: } else {
1410: print $client "error:$!\n";
1411: }
1412: } else {
1413: print $client "error:$!\n";
1414: }
1415: # ---------------------------------------------------------------------- tmpput
1416: } elsif ($userinput =~ /^tmpput/) {
1417: my ($cmd,$what)=split(/:/,$userinput);
1418: my $store;
1419: $tmpsnum++;
1420: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1421: $id=~s/\W/\_/g;
1422: $what=~s/\n//g;
1423: my $execdir=$perlvar{'lonDaemons'};
1424: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1425: print $store $what;
1426: close $store;
1427: print $client "$id\n";
1428: }
1429: else {
1430: print $client "error:$!\n";
1431: }
1432:
1433: # ---------------------------------------------------------------------- tmpget
1434: } elsif ($userinput =~ /^tmpget/) {
1435: my ($cmd,$id)=split(/:/,$userinput);
1436: chomp($id);
1437: $id=~s/\W/\_/g;
1438: my $store;
1439: my $execdir=$perlvar{'lonDaemons'};
1440: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1441: my $reply=<$store>;
1442: print $client "$reply\n";
1443: close $store;
1444: }
1445: else {
1446: print $client "error:$!\n";
1447: }
1448:
1449: # -------------------------------------------------------------------------- ls
1450: } elsif ($userinput =~ /^ls/) {
1451: my ($cmd,$ulsdir)=split(/:/,$userinput);
1452: my $ulsout='';
1453: my $ulsfn;
1454: if (-e $ulsdir) {
1455: if(-d $ulsdir) {
1456: if (opendir(LSDIR,$ulsdir)) {
1457: while ($ulsfn=readdir(LSDIR)) {
1458: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1459: $ulsout.=$ulsfn.'&'.
1460: join('&',@ulsstats).':';
1461: }
1462: closedir(LSDIR);
1463: }
1464: } else {
1465: my @ulsstats=stat($ulsdir);
1466: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1467: }
1468: } else {
1469: $ulsout='no_such_dir';
1470: }
1471: if ($ulsout eq '') { $ulsout='empty'; }
1472: print $client "$ulsout\n";
1473: # ------------------------------------------------------------------ Hanging up
1474: } elsif (($userinput =~ /^exit/) ||
1475: ($userinput =~ /^init/)) {
1476: &logthis(
1477: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1478: print $client "bye\n";
1479: $client->close();
1480: last;
1481: # ------------------------------------------------------------- unknown command
1482: } else {
1483: # unknown command
1484: print $client "unknown_cmd\n";
1485: }
1486: # -------------------------------------------------------------------- complete
1487: alarm(0);
1488: &status('Listening to '.$hostid{$clientip});
1489: }
1490: # --------------------------------------------- client unknown or fishy, refuse
1491: } else {
1492: print $client "refused\n";
1493: $client->close();
1494: &logthis("<font color=blue>WARNING: "
1495: ."Rejected client $clientip, closing connection</font>");
1496: }
1497: }
1498:
1499: # =============================================================================
1500:
1501: &logthis("<font color=red>CRITICAL: "
1502: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1503: # tidy up gracefully and finish
1504:
1505: $server->close();
1506:
1507: # this exit is VERY important, otherwise the child will become
1508: # a producer of more and more children, forking yourself into
1509: # process death.
1510: exit;
1511: }
1512: }
1513:
1514:
1515: #
1516: # Checks to see if the input roleput request was to set
1517: # an author role. If so, invokes the lchtmldir script to set
1518: # up a correct public_html
1519: # Parameters:
1520: # request - The request sent to the rolesput subchunk.
1521: # We're looking for /domain/_au
1522: # domain - The domain in which the user is having roles doctored.
1523: # user - Name of the user for which the role is being put.
1524: # authtype - The authentication type associated with the user.
1525: #
1526: sub ManagePermissions
1527: {
1528: my $request = shift;
1529: my $domain = shift;
1530: my $user = shift;
1531: my $authtype= shift;
1532:
1533: # See if the request is of the form /$domain/_au
1534:
1535: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1536: my $execdir = $perlvar{'lonDaemons'};
1537: my $userhome= "/home/$user" ;
1538: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1539: system("$execdir/lchtmldir $userhome $user $authtype");
1540: }
1541: }
1542: #
1543: # GetAuthType - Determines the authorization type of a user in a domain.
1544:
1545: # Returns the authorization type or nouser if there is no such user.
1546: #
1547: sub GetAuthType
1548: {
1549: my $domain = shift;
1550: my $user = shift;
1551:
1552: Debug("GetAuthType( $domain, $user ) \n");
1553: my $proname = &propath($domain, $user);
1554: my $passwdfile = "$proname/passwd";
1555: if( -e $passwdfile ) {
1556: my $pf = IO::File->new($passwdfile);
1557: my $realpassword = <$pf>;
1558: chomp($realpassword);
1559: Debug("Password info = $realpassword\n");
1560: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1561: Debug("Authtype = $authtype, content = $contentpwd\n");
1562: my $availinfo = '';
1563: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1564: $availinfo = $contentpwd;
1565: }
1566:
1567: return "$authtype:$availinfo";
1568: }
1569: else {
1570: Debug("Returning nouser");
1571: return "nouser";
1572: }
1573: }
1574:
1575: sub addline {
1576: my ($fname,$hostid,$ip,$newline)=@_;
1577: my $contents;
1578: my $found=0;
1579: my $expr='^'.$hostid.':'.$ip.':';
1580: $expr =~ s/\./\\\./g;
1581: if ($sh=IO::File->new("$fname.subscription")) {
1582: while (my $subline=<$sh>) {
1583: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1584: }
1585: $sh->close();
1586: }
1587: $sh=IO::File->new(">$fname.subscription");
1588: if ($contents) { print $sh $contents; }
1589: if ($newline) { print $sh $newline; }
1590: $sh->close();
1591: return $found;
1592: }
1593:
1594: sub getchat {
1595: my ($cdom,$cname)=@_;
1596: my %hash;
1597: my $proname=&propath($cdom,$cname);
1598: my @entries=();
1599: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1600: &GDBM_READER(),0640)) {
1601: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1602: untie %hash;
1603: }
1604: return @entries;
1605: }
1606:
1607: sub chatadd {
1608: my ($cdom,$cname,$newchat)=@_;
1609: my %hash;
1610: my $proname=&propath($cdom,$cname);
1611: my @entries=();
1612: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1613: &GDBM_WRCREAT(),0640)) {
1614: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1615: my $time=time;
1616: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1617: my ($thentime,$idnum)=split(/\_/,$lastid);
1618: my $newid=$time.'_000000';
1619: if ($thentime==$time) {
1620: $idnum=~s/^0+//;
1621: $idnum++;
1622: $idnum=substr('000000'.$idnum,-6,6);
1623: $newid=$time.'_'.$idnum;
1624: }
1625: $hash{$newid}=$newchat;
1626: my $expired=$time-3600;
1627: foreach (keys %hash) {
1628: my ($thistime)=($_=~/(\d+)\_/);
1629: if ($thistime<$expired) {
1630: delete $hash{$_};
1631: }
1632: }
1633: untie %hash;
1634: }
1635: }
1636:
1637: sub unsub {
1638: my ($fname,$clientip)=@_;
1639: my $result;
1640: if (unlink("$fname.$hostid{$clientip}")) {
1641: $result="ok\n";
1642: } else {
1643: $result="not_subscribed\n";
1644: }
1645: if (-e "$fname.subscription") {
1646: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1647: if ($found) { $result="ok\n"; }
1648: } else {
1649: if ($result != "ok\n") { $result="not_subscribed\n"; }
1650: }
1651: return $result;
1652: }
1653:
1654: sub currentversion {
1655: my $fname=shift;
1656: my $version=-1;
1657: my $ulsdir='';
1658: if ($fname=~/^(.+)\/[^\/]+$/) {
1659: $ulsdir=$1;
1660: }
1661: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1662: $fname=~s/\.(\w+(?:\.meta)*)$/\.\(\\d\+\)\.$1\$/;
1663:
1664: if (-e $fname) { $version=1; }
1665: if (-e $ulsdir) {
1666: if(-d $ulsdir) {
1667: if (opendir(LSDIR,$ulsdir)) {
1668: while ($ulsfn=readdir(LSDIR)) {
1669: # see if this is a regular file (ignore links produced earlier)
1670: my $thisfile=$ulsdir.'/'.$ulsfn;
1671: unless (-l $thisfile) {
1672: if ($thisfile=~/$fname/) {
1673: if ($1>$version) { $version=$1; }
1674: }
1675: }
1676: }
1677: closedir(LSDIR);
1678: $version++;
1679: }
1680: }
1681: }
1682: return $version;
1683: }
1684:
1685: sub thisversion {
1686: my $fname=shift;
1687: my $version=-1;
1688: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1689: $version=$1;
1690: }
1691: return $version;
1692: }
1693:
1694: sub subscribe {
1695: my ($userinput,$clientip)=@_;
1696: my $result;
1697: my ($cmd,$fname)=split(/:/,$userinput);
1698: my $ownership=&ishome($fname);
1699: if ($ownership eq 'owner') {
1700: # explitly asking for the current version?
1701: unless (-e $fname) {
1702: my $currentversion=¤tversion($fname);
1703: if (&thisversion($fname)==$currentversion) {
1704: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1705: my $root=$1;
1706: my $extension=$2;
1707: symlink($root.'.'.$extension,
1708: $root.'.'.$currentversion.'.'.$extension);
1709: unless ($extension=~/\.meta$/) {
1710: symlink($root.'.'.$extension.'.meta',
1711: $root.'.'.$currentversion.'.'.$extension.'.meta');
1712: }
1713: }
1714: }
1715: }
1716: if (-e $fname) {
1717: if (-d $fname) {
1718: $result="directory\n";
1719: } else {
1720: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1721: $now=time;
1722: my $found=&addline($fname,$hostid{$clientip},$clientip,
1723: "$hostid{$clientip}:$clientip:$now\n");
1724: if ($found) { $result="$fname\n"; }
1725: # if they were subscribed to only meta data, delete that
1726: # subscription, when you subscribe to a file you also get
1727: # the metadata
1728: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1729: $fname=~s/\/home\/httpd\/html\/res/raw/;
1730: $fname="http://$thisserver/".$fname;
1731: $result="$fname\n";
1732: }
1733: } else {
1734: $result="not_found\n";
1735: }
1736: } else {
1737: $result="rejected\n";
1738: }
1739: return $result;
1740: }
1741:
1742: sub make_passwd_file {
1743: my ($uname, $umode,$npass,$passfilename)=@_;
1744: my $result="ok\n";
1745: if ($umode eq 'krb4' or $umode eq 'krb5') {
1746: {
1747: my $pf = IO::File->new(">$passfilename");
1748: print $pf "$umode:$npass\n";
1749: }
1750: } elsif ($umode eq 'internal') {
1751: my $salt=time;
1752: $salt=substr($salt,6,2);
1753: my $ncpass=crypt($npass,$salt);
1754: {
1755: &Debug("Creating internal auth");
1756: my $pf = IO::File->new(">$passfilename");
1757: print $pf "internal:$ncpass\n";
1758: }
1759: } elsif ($umode eq 'localauth') {
1760: {
1761: my $pf = IO::File->new(">$passfilename");
1762: print $pf "localauth:$npass\n";
1763: }
1764: } elsif ($umode eq 'unix') {
1765: {
1766: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1767: {
1768: &Debug("Executing external: ".$execpath);
1769: &Debug("user = ".$uname.", Password =". $npass);
1770: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
1771: print $se "$uname\n";
1772: print $se "$npass\n";
1773: print $se "$npass\n";
1774: }
1775: my $useraddok = $?;
1776: if($useraddok > 0) {
1777: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1778: }
1779: my $pf = IO::File->new(">$passfilename");
1780: print $pf "unix:\n";
1781: }
1782: } elsif ($umode eq 'none') {
1783: {
1784: my $pf = IO::File->new(">$passfilename");
1785: print $pf "none:\n";
1786: }
1787: } else {
1788: $result="auth_mode_error\n";
1789: }
1790: return $result;
1791: }
1792:
1793: # ----------------------------------- POD (plain old documentation, CPAN style)
1794:
1795: =head1 NAME
1796:
1797: lond - "LON Daemon" Server (port "LOND" 5663)
1798:
1799: =head1 SYNOPSIS
1800:
1801: Usage: B<lond>
1802:
1803: Should only be run as user=www. This is a command-line script which
1804: is invoked by B<loncron>. There is no expectation that a typical user
1805: will manually start B<lond> from the command-line. (In other words,
1806: DO NOT START B<lond> YOURSELF.)
1807:
1808: =head1 DESCRIPTION
1809:
1810: There are two characteristics associated with the running of B<lond>,
1811: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1812: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1813: subscriptions, etc). These are described in two large
1814: sections below.
1815:
1816: B<PROCESS MANAGEMENT>
1817:
1818: Preforker - server who forks first. Runs as a daemon. HUPs.
1819: Uses IDEA encryption
1820:
1821: B<lond> forks off children processes that correspond to the other servers
1822: in the network. Management of these processes can be done at the
1823: parent process level or the child process level.
1824:
1825: B<logs/lond.log> is the location of log messages.
1826:
1827: The process management is now explained in terms of linux shell commands,
1828: subroutines internal to this code, and signal assignments:
1829:
1830: =over 4
1831:
1832: =item *
1833:
1834: PID is stored in B<logs/lond.pid>
1835:
1836: This is the process id number of the parent B<lond> process.
1837:
1838: =item *
1839:
1840: SIGTERM and SIGINT
1841:
1842: Parent signal assignment:
1843: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1844:
1845: Child signal assignment:
1846: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1847: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1848: to restart a new child.)
1849:
1850: Command-line invocations:
1851: B<kill> B<-s> SIGTERM I<PID>
1852: B<kill> B<-s> SIGINT I<PID>
1853:
1854: Subroutine B<HUNTSMAN>:
1855: This is only invoked for the B<lond> parent I<PID>.
1856: This kills all the children, and then the parent.
1857: The B<lonc.pid> file is cleared.
1858:
1859: =item *
1860:
1861: SIGHUP
1862:
1863: Current bug:
1864: This signal can only be processed the first time
1865: on the parent process. Subsequent SIGHUP signals
1866: have no effect.
1867:
1868: Parent signal assignment:
1869: $SIG{HUP} = \&HUPSMAN;
1870:
1871: Child signal assignment:
1872: none (nothing happens)
1873:
1874: Command-line invocations:
1875: B<kill> B<-s> SIGHUP I<PID>
1876:
1877: Subroutine B<HUPSMAN>:
1878: This is only invoked for the B<lond> parent I<PID>,
1879: This kills all the children, and then the parent.
1880: The B<lond.pid> file is cleared.
1881:
1882: =item *
1883:
1884: SIGUSR1
1885:
1886: Parent signal assignment:
1887: $SIG{USR1} = \&USRMAN;
1888:
1889: Child signal assignment:
1890: $SIG{USR1}= \&logstatus;
1891:
1892: Command-line invocations:
1893: B<kill> B<-s> SIGUSR1 I<PID>
1894:
1895: Subroutine B<USRMAN>:
1896: When invoked for the B<lond> parent I<PID>,
1897: SIGUSR1 is sent to all the children, and the status of
1898: each connection is logged.
1899:
1900: =item *
1901:
1902: SIGCHLD
1903:
1904: Parent signal assignment:
1905: $SIG{CHLD} = \&REAPER;
1906:
1907: Child signal assignment:
1908: none
1909:
1910: Command-line invocations:
1911: B<kill> B<-s> SIGCHLD I<PID>
1912:
1913: Subroutine B<REAPER>:
1914: This is only invoked for the B<lond> parent I<PID>.
1915: Information pertaining to the child is removed.
1916: The socket port is cleaned up.
1917:
1918: =back
1919:
1920: B<SERVER-SIDE ACTIVITIES>
1921:
1922: Server-side information can be accepted in an encrypted or non-encrypted
1923: method.
1924:
1925: =over 4
1926:
1927: =item ping
1928:
1929: Query a client in the hosts.tab table; "Are you there?"
1930:
1931: =item pong
1932:
1933: Respond to a ping query.
1934:
1935: =item ekey
1936:
1937: Read in encrypted key, make cipher. Respond with a buildkey.
1938:
1939: =item load
1940:
1941: Respond with CPU load based on a computation upon /proc/loadavg.
1942:
1943: =item currentauth
1944:
1945: Reply with current authentication information (only over an
1946: encrypted channel).
1947:
1948: =item auth
1949:
1950: Only over an encrypted channel, reply as to whether a user's
1951: authentication information can be validated.
1952:
1953: =item passwd
1954:
1955: Allow for a password to be set.
1956:
1957: =item makeuser
1958:
1959: Make a user.
1960:
1961: =item passwd
1962:
1963: Allow for authentication mechanism and password to be changed.
1964:
1965: =item home
1966:
1967: Respond to a question "are you the home for a given user?"
1968:
1969: =item update
1970:
1971: Update contents of a subscribed resource.
1972:
1973: =item unsubscribe
1974:
1975: The server is unsubscribing from a resource.
1976:
1977: =item subscribe
1978:
1979: The server is subscribing to a resource.
1980:
1981: =item log
1982:
1983: Place in B<logs/lond.log>
1984:
1985: =item put
1986:
1987: stores hash in namespace
1988:
1989: =item rolesput
1990:
1991: put a role into a user's environment
1992:
1993: =item get
1994:
1995: returns hash with keys from array
1996: reference filled in from namespace
1997:
1998: =item eget
1999:
2000: returns hash with keys from array
2001: reference filled in from namesp (encrypts the return communication)
2002:
2003: =item rolesget
2004:
2005: get a role from a user's environment
2006:
2007: =item del
2008:
2009: deletes keys out of array from namespace
2010:
2011: =item keys
2012:
2013: returns namespace keys
2014:
2015: =item dump
2016:
2017: dumps the complete (or key matching regexp) namespace into a hash
2018:
2019: =item store
2020:
2021: stores hash permanently
2022: for this url; hashref needs to be given and should be a \%hashname; the
2023: remaining args aren't required and if they aren't passed or are '' they will
2024: be derived from the ENV
2025:
2026: =item restore
2027:
2028: returns a hash for a given url
2029:
2030: =item querysend
2031:
2032: Tells client about the lonsql process that has been launched in response
2033: to a sent query.
2034:
2035: =item queryreply
2036:
2037: Accept information from lonsql and make appropriate storage in temporary
2038: file space.
2039:
2040: =item idput
2041:
2042: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2043: for each student, defined perhaps by the institutional Registrar.)
2044:
2045: =item idget
2046:
2047: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2048: for each student, defined perhaps by the institutional Registrar.)
2049:
2050: =item tmpput
2051:
2052: Accept and store information in temporary space.
2053:
2054: =item tmpget
2055:
2056: Send along temporarily stored information.
2057:
2058: =item ls
2059:
2060: List part of a user's directory.
2061:
2062: =item Hanging up (exit or init)
2063:
2064: What to do when a client tells the server that they (the client)
2065: are leaving the network.
2066:
2067: =item unknown command
2068:
2069: If B<lond> is sent an unknown command (not in the list above),
2070: it replys to the client "unknown_cmd".
2071:
2072: =item UNKNOWN CLIENT
2073:
2074: If the anti-spoofing algorithm cannot verify the client,
2075: the client is rejected (with a "refused" message sent
2076: to the client, and the connection is closed.
2077:
2078: =back
2079:
2080: =head1 PREREQUISITES
2081:
2082: IO::Socket
2083: IO::File
2084: Apache::File
2085: Symbol
2086: POSIX
2087: Crypt::IDEA
2088: LWP::UserAgent()
2089: GDBM_File
2090: Authen::Krb4
2091: Authen::Krb5
2092:
2093: =head1 COREQUISITES
2094:
2095: =head1 OSNAMES
2096:
2097: linux
2098:
2099: =head1 SCRIPT CATEGORIES
2100:
2101: Server/Process
2102:
2103: =cut
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