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lond
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1.105:
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Mon Jan 13 21:52:11 2003 UTC (21 years, 3 months ago) by
matthew
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Added new lond command: dumpcurrent.
Added lonnet::dumpcurrent
Modified spreadsheet.pm to use dumpcurrent to retrieve user data.
Some logging information is active, some is not. More testing required.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.105 2003/01/13 21:52:11 matthew 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: $0='lond: '.$what.' '.$local;
344: }
345:
346: # -------------------------------------------------------- Escape Special Chars
347:
348: sub escape {
349: my $str=shift;
350: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
351: return $str;
352: }
353:
354: # ----------------------------------------------------- Un-Escape Special Chars
355:
356: sub unescape {
357: my $str=shift;
358: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
359: return $str;
360: }
361:
362: # ----------------------------------------------------------- Send USR1 to lonc
363:
364: sub reconlonc {
365: my $peerfile=shift;
366: &logthis("Trying to reconnect for $peerfile");
367: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
368: if (my $fh=IO::File->new("$loncfile")) {
369: my $loncpid=<$fh>;
370: chomp($loncpid);
371: if (kill 0 => $loncpid) {
372: &logthis("lonc at pid $loncpid responding, sending USR1");
373: kill USR1 => $loncpid;
374: sleep 5;
375: if (-e "$peerfile") { return; }
376: &logthis("$peerfile still not there, give it another try");
377: sleep 10;
378: if (-e "$peerfile") { return; }
379: &logthis(
380: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
381: } else {
382: &logthis(
383: "<font color=red>CRITICAL: "
384: ."lonc at pid $loncpid not responding, giving up</font>");
385: }
386: } else {
387: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
388: }
389: }
390:
391: # -------------------------------------------------- Non-critical communication
392:
393: sub subreply {
394: my ($cmd,$server)=@_;
395: my $peerfile="$perlvar{'lonSockDir'}/$server";
396: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
397: Type => SOCK_STREAM,
398: Timeout => 10)
399: or return "con_lost";
400: print $sclient "$cmd\n";
401: my $answer=<$sclient>;
402: chomp($answer);
403: if (!$answer) { $answer="con_lost"; }
404: return $answer;
405: }
406:
407: sub reply {
408: my ($cmd,$server)=@_;
409: my $answer;
410: if ($server ne $perlvar{'lonHostID'}) {
411: $answer=subreply($cmd,$server);
412: if ($answer eq 'con_lost') {
413: $answer=subreply("ping",$server);
414: if ($answer ne $server) {
415: &logthis("sub reply: answer != server");
416: &reconlonc("$perlvar{'lonSockDir'}/$server");
417: }
418: $answer=subreply($cmd,$server);
419: }
420: } else {
421: $answer='self_reply';
422: }
423: return $answer;
424: }
425:
426: # -------------------------------------------------------------- Talk to lonsql
427:
428: sub sqlreply {
429: my ($cmd)=@_;
430: my $answer=subsqlreply($cmd);
431: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
432: return $answer;
433: }
434:
435: sub subsqlreply {
436: my ($cmd)=@_;
437: my $unixsock="mysqlsock";
438: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
439: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
440: Type => SOCK_STREAM,
441: Timeout => 10)
442: or return "con_lost";
443: print $sclient "$cmd\n";
444: my $answer=<$sclient>;
445: chomp($answer);
446: if (!$answer) { $answer="con_lost"; }
447: return $answer;
448: }
449:
450: # -------------------------------------------- Return path to profile directory
451:
452: sub propath {
453: my ($udom,$uname)=@_;
454: $udom=~s/\W//g;
455: $uname=~s/\W//g;
456: my $subdir=$uname.'__';
457: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
458: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
459: return $proname;
460: }
461:
462: # --------------------------------------- Is this the home server of an author?
463:
464: sub ishome {
465: my $author=shift;
466: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
467: my ($udom,$uname)=split(/\//,$author);
468: my $proname=propath($udom,$uname);
469: if (-e $proname) {
470: return 'owner';
471: } else {
472: return 'not_owner';
473: }
474: }
475:
476: # ======================================================= Continue main program
477: # ---------------------------------------------------- Fork once and dissociate
478:
479: $fpid=fork;
480: exit if $fpid;
481: die "Couldn't fork: $!" unless defined ($fpid);
482:
483: POSIX::setsid() or die "Can't start new session: $!";
484:
485: # ------------------------------------------------------- Write our PID on disk
486:
487: $execdir=$perlvar{'lonDaemons'};
488: open (PIDSAVE,">$execdir/logs/lond.pid");
489: print PIDSAVE "$$\n";
490: close(PIDSAVE);
491: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
492: &status('Starting');
493:
494: # ------------------------------------------------------- Now we are on our own
495:
496: # Fork off our children.
497: for (1 .. $PREFORK) {
498: make_new_child();
499: }
500:
501: # ----------------------------------------------------- Install signal handlers
502:
503: &status('Forked children');
504:
505: $SIG{CHLD} = \&REAPER;
506: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
507: $SIG{HUP} = \&HUPSMAN;
508: $SIG{USR1} = \&checkchildren;
509:
510: # And maintain the population.
511: while (1) {
512: &status('Sleeping');
513: sleep; # wait for a signal (i.e., child's death)
514: &logthis('Woke up');
515: &status('Woke up');
516: for ($i = $children; $i < $PREFORK; $i++) {
517: make_new_child(); # top up the child pool
518: }
519: }
520:
521: sub make_new_child {
522: my $pid;
523: my $cipher;
524: my $sigset;
525: &logthis("Attempting to start child");
526: # block signal for fork
527: $sigset = POSIX::SigSet->new(SIGINT);
528: sigprocmask(SIG_BLOCK, $sigset)
529: or die "Can't block SIGINT for fork: $!\n";
530:
531: die "fork: $!" unless defined ($pid = fork);
532:
533: if ($pid) {
534: # Parent records the child's birth and returns.
535: sigprocmask(SIG_UNBLOCK, $sigset)
536: or die "Can't unblock SIGINT for fork: $!\n";
537: $children{$pid} = 1;
538: $children++;
539: &status('Started child '.$pid);
540: return;
541: } else {
542: # Child can *not* return from this subroutine.
543: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
544: $SIG{USR1}= \&logstatus;
545: $SIG{ALRM}= \&timeout;
546: $lastlog='Forked ';
547: $status='Forked';
548:
549: # unblock signals
550: sigprocmask(SIG_UNBLOCK, $sigset)
551: or die "Can't unblock SIGINT for fork: $!\n";
552:
553: $tmpsnum=0;
554: #---------------------------------------------------- kerberos 5 initialization
555: &Authen::Krb5::init_context();
556: &Authen::Krb5::init_ets();
557:
558: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
559: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
560: &status('Idle, waiting for connection');
561: $client = $server->accept() or last;
562: &status('Accepted connection');
563: # =============================================================================
564: # do something with the connection
565: # -----------------------------------------------------------------------------
566: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
567: # connection liveness.
568: # see if we know client and check for spoof IP by challenge
569: my $caller=getpeername($client);
570: my ($port,$iaddr)=unpack_sockaddr_in($caller);
571: my $clientip=inet_ntoa($iaddr);
572: my $clientrec=($hostid{$clientip} ne undef);
573: &logthis(
574: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
575: );
576: &status("Connecting $clientip ($hostid{$clientip})");
577: my $clientok;
578: if ($clientrec) {
579: &status("Waiting for init from $clientip ($hostid{$clientip})");
580: my $remotereq=<$client>;
581: $remotereq=~s/\W//g;
582: if ($remotereq eq 'init') {
583: my $challenge="$$".time;
584: print $client "$challenge\n";
585: &status(
586: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
587: $remotereq=<$client>;
588: $remotereq=~s/\W//g;
589: if ($challenge eq $remotereq) {
590: $clientok=1;
591: print $client "ok\n";
592: } else {
593: &logthis(
594: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
595: &status('No challenge reply '.$clientip);
596: }
597: } else {
598: &logthis(
599: "<font color=blue>WARNING: "
600: ."$clientip failed to initialize: >$remotereq< </font>");
601: &status('No init '.$clientip);
602: }
603: } else {
604: &logthis(
605: "<font color=blue>WARNING: Unknown client $clientip</font>");
606: &status('Hung up on '.$clientip);
607: }
608: if ($clientok) {
609: # ---------------- New known client connecting, could mean machine online again
610:
611: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
612: &logthis(
613: "<font color=green>Established connection: $hostid{$clientip}</font>");
614: &status('Will listen to '.$hostid{$clientip});
615: # ------------------------------------------------------------ Process requests
616: while (my $userinput=<$client>) {
617: chomp($userinput);
618: Debug("Request = $userinput\n");
619: &status('Processing '.$hostid{$clientip}.': '.$userinput);
620: my $wasenc=0;
621: alarm(120);
622: # ------------------------------------------------------------ See if encrypted
623: if ($userinput =~ /^enc/) {
624: if ($cipher) {
625: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
626: $userinput='';
627: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
628: $userinput.=
629: $cipher->decrypt(
630: pack("H16",substr($encinput,$encidx,16))
631: );
632: }
633: $userinput=substr($userinput,0,$cmdlength);
634: $wasenc=1;
635: }
636: }
637:
638: # ------------------------------------------------------------- Normal commands
639: # ------------------------------------------------------------------------ ping
640: if ($userinput =~ /^ping/) {
641: print $client "$perlvar{'lonHostID'}\n";
642: # ------------------------------------------------------------------------ pong
643: } elsif ($userinput =~ /^pong/) {
644: $reply=reply("ping",$hostid{$clientip});
645: print $client "$perlvar{'lonHostID'}:$reply\n";
646: # ------------------------------------------------------------------------ ekey
647: } elsif ($userinput =~ /^ekey/) {
648: my $buildkey=time.$$.int(rand 100000);
649: $buildkey=~tr/1-6/A-F/;
650: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
651: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
652: $key=~tr/a-z/A-Z/;
653: $key=~tr/G-P/0-9/;
654: $key=~tr/Q-Z/0-9/;
655: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
656: $key=substr($key,0,32);
657: my $cipherkey=pack("H32",$key);
658: $cipher=new IDEA $cipherkey;
659: print $client "$buildkey\n";
660: # ------------------------------------------------------------------------ load
661: } elsif ($userinput =~ /^load/) {
662: my $loadavg;
663: {
664: my $loadfile=IO::File->new('/proc/loadavg');
665: $loadavg=<$loadfile>;
666: }
667: $loadavg =~ s/\s.*//g;
668: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
669: print $client "$loadpercent\n";
670: # ----------------------------------------------------------------- currentauth
671: } elsif ($userinput =~ /^currentauth/) {
672: if ($wasenc==1) {
673: my ($cmd,$udom,$uname)=split(/:/,$userinput);
674: my $result = GetAuthType($udom, $uname);
675: if($result eq "nouser") {
676: print $client "unknown_user\n";
677: }
678: else {
679: print $client "$result\n"
680: }
681: } else {
682: print $client "refused\n";
683: }
684: # ------------------------------------------------------------------------ auth
685: } elsif ($userinput =~ /^auth/) {
686: if ($wasenc==1) {
687: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
688: chomp($upass);
689: $upass=unescape($upass);
690: my $proname=propath($udom,$uname);
691: my $passfilename="$proname/passwd";
692: if (-e $passfilename) {
693: my $pf = IO::File->new($passfilename);
694: my $realpasswd=<$pf>;
695: chomp($realpasswd);
696: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
697: my $pwdcorrect=0;
698: if ($howpwd eq 'internal') {
699: &Debug("Internal auth");
700: $pwdcorrect=
701: (crypt($upass,$contentpwd) eq $contentpwd);
702: } elsif ($howpwd eq 'unix') {
703: &Debug("Unix auth");
704: if((getpwnam($uname))[1] eq "") { #no such user!
705: $pwdcorrect = 0;
706: } else {
707: $contentpwd=(getpwnam($uname))[1];
708: my $pwauth_path="/usr/local/sbin/pwauth";
709: unless ($contentpwd eq 'x') {
710: $pwdcorrect=
711: (crypt($upass,$contentpwd) eq
712: $contentpwd);
713: }
714:
715: elsif (-e $pwauth_path) {
716: open PWAUTH, "|$pwauth_path" or
717: die "Cannot invoke authentication";
718: print PWAUTH "$uname\n$upass\n";
719: close PWAUTH;
720: $pwdcorrect=!$?;
721: }
722: }
723: } elsif ($howpwd eq 'krb4') {
724: $null=pack("C",0);
725: unless ($upass=~/$null/) {
726: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
727: ($uname,"",$contentpwd,'krbtgt',
728: $contentpwd,1,$upass);
729: if (!$krb4_error) {
730: $pwdcorrect = 1;
731: } else {
732: $pwdcorrect=0;
733: # log error if it is not a bad password
734: if ($krb4_error != 62) {
735: &logthis('krb4:'.$uname.','.$contentpwd.','.
736: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
737: }
738: }
739: }
740: } elsif ($howpwd eq 'krb5') {
741: $null=pack("C",0);
742: unless ($upass=~/$null/) {
743: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
744: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
745: my $krbserver=&Authen::Krb5::parse_name($krbservice);
746: my $credentials=&Authen::Krb5::cc_default();
747: $credentials->initialize($krbclient);
748: my $krbreturn =
749: &Authen::Krb5::get_in_tkt_with_password(
750: $krbclient,$krbserver,$upass,$credentials);
751: # unless ($krbreturn) {
752: # &logthis("Krb5 Error: ".
753: # &Authen::Krb5::error());
754: # }
755: $pwdcorrect = ($krbreturn == 1);
756: } else { $pwdcorrect=0; }
757: } elsif ($howpwd eq 'localauth') {
758: $pwdcorrect=&localauth::localauth($uname,$upass,
759: $contentpwd);
760: }
761: if ($pwdcorrect) {
762: print $client "authorized\n";
763: } else {
764: print $client "non_authorized\n";
765: }
766: } else {
767: print $client "unknown_user\n";
768: }
769: } else {
770: print $client "refused\n";
771: }
772: # ---------------------------------------------------------------------- passwd
773: } elsif ($userinput =~ /^passwd/) {
774: if ($wasenc==1) {
775: my
776: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
777: chomp($npass);
778: $upass=&unescape($upass);
779: $npass=&unescape($npass);
780: &Debug("Trying to change password for $uname");
781: my $proname=propath($udom,$uname);
782: my $passfilename="$proname/passwd";
783: if (-e $passfilename) {
784: my $realpasswd;
785: { my $pf = IO::File->new($passfilename);
786: $realpasswd=<$pf>; }
787: chomp($realpasswd);
788: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
789: if ($howpwd eq 'internal') {
790: &Debug("internal auth");
791: if (crypt($upass,$contentpwd) eq $contentpwd) {
792: my $salt=time;
793: $salt=substr($salt,6,2);
794: my $ncpass=crypt($npass,$salt);
795: { my $pf = IO::File->new(">$passfilename");
796: print $pf "internal:$ncpass\n"; }
797: &logthis("Result of password change for $uname: pwchange_success");
798: print $client "ok\n";
799: } else {
800: print $client "non_authorized\n";
801: }
802: } elsif ($howpwd eq 'unix') {
803: # Unix means we have to access /etc/password
804: # one way or another.
805: # First: Make sure the current password is
806: # correct
807: &Debug("auth is unix");
808: $contentpwd=(getpwnam($uname))[1];
809: my $pwdcorrect = "0";
810: my $pwauth_path="/usr/local/sbin/pwauth";
811: unless ($contentpwd eq 'x') {
812: $pwdcorrect=
813: (crypt($upass,$contentpwd) eq $contentpwd);
814: } elsif (-e $pwauth_path) {
815: open PWAUTH, "|$pwauth_path" or
816: die "Cannot invoke authentication";
817: print PWAUTH "$uname\n$upass\n";
818: close PWAUTH;
819: &Debug("exited pwauth with $? ($uname,$upass) ");
820: $pwdcorrect=($? == 0);
821: }
822: if ($pwdcorrect) {
823: my $execdir=$perlvar{'lonDaemons'};
824: &Debug("Opening lcpasswd pipeline");
825: my $pf = IO::File->new("|$execdir/lcpasswd > /home/www/lcpasswd.log");
826: print $pf "$uname\n$npass\n$npass\n";
827: close $pf;
828: my $err = $?;
829: my $result = ($err>0 ? 'pwchange_failure'
830: : 'ok');
831: &logthis("Result of password change for $uname: ".
832: &lcpasswdstrerror($?));
833: print $client "$result\n";
834: } else {
835: print $client "non_authorized\n";
836: }
837: } else {
838: print $client "auth_mode_error\n";
839: }
840: } else {
841: print $client "unknown_user\n";
842: }
843: } else {
844: print $client "refused\n";
845: }
846: # -------------------------------------------------------------------- makeuser
847: } elsif ($userinput =~ /^makeuser/) {
848: &Debug("Make user received");
849: my $oldumask=umask(0077);
850: if ($wasenc==1) {
851: my
852: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
853: &Debug("cmd =".$cmd." $udom =".$udom.
854: " uname=".$uname);
855: chomp($npass);
856: $npass=&unescape($npass);
857: my $proname=propath($udom,$uname);
858: my $passfilename="$proname/passwd";
859: &Debug("Password file created will be:".
860: $passfilename);
861: if (-e $passfilename) {
862: print $client "already_exists\n";
863: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
864: print $client "not_right_domain\n";
865: } else {
866: @fpparts=split(/\//,$proname);
867: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
868: $fperror='';
869: for ($i=3;$i<=$#fpparts;$i++) {
870: $fpnow.='/'.$fpparts[$i];
871: unless (-e $fpnow) {
872: unless (mkdir($fpnow,0777)) {
873: $fperror="error:$!";
874: }
875: }
876: }
877: unless ($fperror) {
878: my $result=&make_passwd_file($uname, $umode,$npass,
879: $passfilename);
880: print $client $result;
881: } else {
882: print $client "$fperror\n";
883: }
884: }
885: } else {
886: print $client "refused\n";
887: }
888: umask($oldumask);
889: # -------------------------------------------------------------- changeuserauth
890: } elsif ($userinput =~ /^changeuserauth/) {
891: &Debug("Changing authorization");
892: if ($wasenc==1) {
893: my
894: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
895: chomp($npass);
896: &Debug("cmd = ".$cmd." domain= ".$udom.
897: "uname =".$uname." umode= ".$umode);
898: $npass=&unescape($npass);
899: my $proname=&propath($udom,$uname);
900: my $passfilename="$proname/passwd";
901: if ($udom ne $perlvar{'lonDefDomain'}) {
902: print $client "not_right_domain\n";
903: } else {
904: my $result=&make_passwd_file($uname, $umode,$npass,
905: $passfilename);
906: print $client $result;
907: }
908: } else {
909: print $client "refused\n";
910: }
911: # ------------------------------------------------------------------------ home
912: } elsif ($userinput =~ /^home/) {
913: my ($cmd,$udom,$uname)=split(/:/,$userinput);
914: chomp($uname);
915: my $proname=propath($udom,$uname);
916: if (-e $proname) {
917: print $client "found\n";
918: } else {
919: print $client "not_found\n";
920: }
921: # ---------------------------------------------------------------------- update
922: } elsif ($userinput =~ /^update/) {
923: my ($cmd,$fname)=split(/:/,$userinput);
924: my $ownership=ishome($fname);
925: if ($ownership eq 'not_owner') {
926: if (-e $fname) {
927: my ($dev,$ino,$mode,$nlink,
928: $uid,$gid,$rdev,$size,
929: $atime,$mtime,$ctime,
930: $blksize,$blocks)=stat($fname);
931: $now=time;
932: $since=$now-$atime;
933: if ($since>$perlvar{'lonExpire'}) {
934: $reply=
935: reply("unsub:$fname","$hostid{$clientip}");
936: unlink("$fname");
937: } else {
938: my $transname="$fname.in.transfer";
939: my $remoteurl=
940: reply("sub:$fname","$hostid{$clientip}");
941: my $response;
942: {
943: my $ua=new LWP::UserAgent;
944: my $request=new HTTP::Request('GET',"$remoteurl");
945: $response=$ua->request($request,$transname);
946: }
947: if ($response->is_error()) {
948: unlink($transname);
949: my $message=$response->status_line;
950: &logthis(
951: "LWP GET: $message for $fname ($remoteurl)");
952: } else {
953: if ($remoteurl!~/\.meta$/) {
954: my $ua=new LWP::UserAgent;
955: my $mrequest=
956: new HTTP::Request('GET',$remoteurl.'.meta');
957: my $mresponse=
958: $ua->request($mrequest,$fname.'.meta');
959: if ($mresponse->is_error()) {
960: unlink($fname.'.meta');
961: }
962: }
963: rename($transname,$fname);
964: }
965: }
966: print $client "ok\n";
967: } else {
968: print $client "not_found\n";
969: }
970: } else {
971: print $client "rejected\n";
972: }
973: # -------------------------------------- fetch a user file from a remote server
974: } elsif ($userinput =~ /^fetchuserfile/) {
975: my ($cmd,$fname)=split(/:/,$userinput);
976: my ($udom,$uname,$ufile)=split(/\//,$fname);
977: my $udir=propath($udom,$uname).'/userfiles';
978: unless (-e $udir) { mkdir($udir,0770); }
979: if (-e $udir) {
980: $ufile=~s/^[\.\~]+//;
981: $ufile=~s/\///g;
982: my $transname=$udir.'/'.$ufile;
983: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
984: my $response;
985: {
986: my $ua=new LWP::UserAgent;
987: my $request=new HTTP::Request('GET',"$remoteurl");
988: $response=$ua->request($request,$transname);
989: }
990: if ($response->is_error()) {
991: unlink($transname);
992: my $message=$response->status_line;
993: &logthis(
994: "LWP GET: $message for $fname ($remoteurl)");
995: print $client "failed\n";
996: } else {
997: print $client "ok\n";
998: }
999: } else {
1000: print $client "not_home\n";
1001: }
1002: # ------------------------------------------ authenticate access to a user file
1003: } elsif ($userinput =~ /^tokenauthuserfile/) {
1004: my ($cmd,$fname,$session)=split(/:/,$userinput);
1005: chomp($session);
1006: $reply='non_auth';
1007: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
1008: $session.'.id')) {
1009: while ($line=<ENVIN>) {
1010: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
1011: }
1012: close(ENVIN);
1013: print $client $reply."\n";
1014: } else {
1015: print $client "invalid_token\n";
1016: }
1017: # ----------------------------------------------------------------- unsubscribe
1018: } elsif ($userinput =~ /^unsub/) {
1019: my ($cmd,$fname)=split(/:/,$userinput);
1020: if (-e $fname) {
1021: print $client &unsub($client,$fname,$clientip);
1022: } else {
1023: print $client "not_found\n";
1024: }
1025: # ------------------------------------------------------------------- subscribe
1026: } elsif ($userinput =~ /^sub/) {
1027: print $client &subscribe($userinput,$clientip);
1028: # ------------------------------------------------------------- current version
1029: } elsif ($userinput =~ /^currentversion/) {
1030: my ($cmd,$fname)=split(/:/,$userinput);
1031: print $client ¤tversion($fname)."\n";
1032: # ------------------------------------------------------------------------- log
1033: } elsif ($userinput =~ /^log/) {
1034: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1035: chomp($what);
1036: my $proname=propath($udom,$uname);
1037: my $now=time;
1038: {
1039: my $hfh;
1040: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1041: print $hfh "$now:$hostid{$clientip}:$what\n";
1042: print $client "ok\n";
1043: } else {
1044: print $client "error:$!\n";
1045: }
1046: }
1047: # ------------------------------------------------------------------------- put
1048: } elsif ($userinput =~ /^put/) {
1049: my ($cmd,$udom,$uname,$namespace,$what)
1050: =split(/:/,$userinput);
1051: $namespace=~s/\//\_/g;
1052: $namespace=~s/\W//g;
1053: if ($namespace ne 'roles') {
1054: chomp($what);
1055: my $proname=propath($udom,$uname);
1056: my $now=time;
1057: unless ($namespace=~/^nohist\_/) {
1058: my $hfh;
1059: if (
1060: $hfh=IO::File->new(">>$proname/$namespace.hist")
1061: ) { print $hfh "P:$now:$what\n"; }
1062: }
1063: my @pairs=split(/\&/,$what);
1064: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1065: foreach $pair (@pairs) {
1066: ($key,$value)=split(/=/,$pair);
1067: $hash{$key}=$value;
1068: }
1069: if (untie(%hash)) {
1070: print $client "ok\n";
1071: } else {
1072: print $client "error:$!\n";
1073: }
1074: } else {
1075: print $client "error:$!\n";
1076: }
1077: } else {
1078: print $client "refused\n";
1079: }
1080: # -------------------------------------------------------------------- rolesput
1081: } elsif ($userinput =~ /^rolesput/) {
1082: &Debug("rolesput");
1083: if ($wasenc==1) {
1084: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1085: =split(/:/,$userinput);
1086: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1087: "user = ".$exeuser." udom=".$udom.
1088: "what = ".$what);
1089: my $namespace='roles';
1090: chomp($what);
1091: my $proname=propath($udom,$uname);
1092: my $now=time;
1093: {
1094: my $hfh;
1095: if (
1096: $hfh=IO::File->new(">>$proname/$namespace.hist")
1097: ) {
1098: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1099: }
1100: }
1101: my @pairs=split(/\&/,$what);
1102: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1103: foreach $pair (@pairs) {
1104: ($key,$value)=split(/=/,$pair);
1105: &ManagePermissions($key, $udom, $uname,
1106: &GetAuthType( $udom,
1107: $uname));
1108: $hash{$key}=$value;
1109:
1110: }
1111: if (untie(%hash)) {
1112: print $client "ok\n";
1113: } else {
1114: print $client "error:$!\n";
1115: }
1116: } else {
1117: print $client "error:$!\n";
1118: }
1119: } else {
1120: print $client "refused\n";
1121: }
1122: # ------------------------------------------------------------------------- get
1123: } elsif ($userinput =~ /^get/) {
1124: my ($cmd,$udom,$uname,$namespace,$what)
1125: =split(/:/,$userinput);
1126: $namespace=~s/\//\_/g;
1127: $namespace=~s/\W//g;
1128: chomp($what);
1129: my @queries=split(/\&/,$what);
1130: my $proname=propath($udom,$uname);
1131: my $qresult='';
1132: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1133: for ($i=0;$i<=$#queries;$i++) {
1134: $qresult.="$hash{$queries[$i]}&";
1135: }
1136: if (untie(%hash)) {
1137: $qresult=~s/\&$//;
1138: print $client "$qresult\n";
1139: } else {
1140: print $client "error:$!\n";
1141: }
1142: } else {
1143: print $client "error:$!\n";
1144: }
1145: # ------------------------------------------------------------------------ eget
1146: } elsif ($userinput =~ /^eget/) {
1147: my ($cmd,$udom,$uname,$namespace,$what)
1148: =split(/:/,$userinput);
1149: $namespace=~s/\//\_/g;
1150: $namespace=~s/\W//g;
1151: chomp($what);
1152: my @queries=split(/\&/,$what);
1153: my $proname=propath($udom,$uname);
1154: my $qresult='';
1155: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1156: for ($i=0;$i<=$#queries;$i++) {
1157: $qresult.="$hash{$queries[$i]}&";
1158: }
1159: if (untie(%hash)) {
1160: $qresult=~s/\&$//;
1161: if ($cipher) {
1162: my $cmdlength=length($qresult);
1163: $qresult.=" ";
1164: my $encqresult='';
1165: for
1166: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1167: $encqresult.=
1168: unpack("H16",
1169: $cipher->encrypt(substr($qresult,$encidx,8)));
1170: }
1171: print $client "enc:$cmdlength:$encqresult\n";
1172: } else {
1173: print $client "error:no_key\n";
1174: }
1175: } else {
1176: print $client "error:$!\n";
1177: }
1178: } else {
1179: print $client "error:$!\n";
1180: }
1181: # ------------------------------------------------------------------------- del
1182: } elsif ($userinput =~ /^del/) {
1183: my ($cmd,$udom,$uname,$namespace,$what)
1184: =split(/:/,$userinput);
1185: $namespace=~s/\//\_/g;
1186: $namespace=~s/\W//g;
1187: chomp($what);
1188: my $proname=propath($udom,$uname);
1189: my $now=time;
1190: unless ($namespace=~/^nohist\_/) {
1191: my $hfh;
1192: if (
1193: $hfh=IO::File->new(">>$proname/$namespace.hist")
1194: ) { print $hfh "D:$now:$what\n"; }
1195: }
1196: my @keys=split(/\&/,$what);
1197: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1198: foreach $key (@keys) {
1199: delete($hash{$key});
1200: }
1201: if (untie(%hash)) {
1202: print $client "ok\n";
1203: } else {
1204: print $client "error:$!\n";
1205: }
1206: } else {
1207: print $client "error:$!\n";
1208: }
1209: # ------------------------------------------------------------------------ keys
1210: } elsif ($userinput =~ /^keys/) {
1211: my ($cmd,$udom,$uname,$namespace)
1212: =split(/:/,$userinput);
1213: $namespace=~s/\//\_/g;
1214: $namespace=~s/\W//g;
1215: my $proname=propath($udom,$uname);
1216: my $qresult='';
1217: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1218: foreach $key (keys %hash) {
1219: $qresult.="$key&";
1220: }
1221: if (untie(%hash)) {
1222: $qresult=~s/\&$//;
1223: print $client "$qresult\n";
1224: } else {
1225: print $client "error:$!\n";
1226: }
1227: } else {
1228: print $client "error:$!\n";
1229: }
1230: # ----------------------------------------------------------------- dumpcurrent
1231: } elsif ($userinput =~ /^dumpcurrent/) {
1232: my ($cmd,$udom,$uname,$namespace)
1233: =split(/:/,$userinput);
1234: $namespace=~s/\//\_/g;
1235: $namespace=~s/\W//g;
1236: my $qresult='';
1237: my $proname=propath($udom,$uname);
1238: if (tie(%hash,'GDBM_File',
1239: "$proname/$namespace.db",
1240: &GDBM_READER(),0640)) {
1241: # Structure of %data:
1242: # $data{$symb}->{$parameter}=$value;
1243: # $data{$symb}->{'v.'.$parameter}=$version;
1244: # since $parameter will be unescaped, we do not
1245: # have to worry about silly parameter names...
1246: my %data = ();
1247: while (my ($key,$value) = each(%hash)) {
1248: my ($v,$symb,$param) = split(/:/,$key);
1249: next if ($v eq 'version' || $symb eq 'keys');
1250: next if (exists($data{$symb}) &&
1251: exists($data{$symb}->{$param}) &&
1252: $data{$symb}->{'v.'.$param} > $v);
1253: #&logthis("v = ".$v." p = ".$param." s = ".$symb);
1254: $data{$symb}->{$param}=$value;
1255: $data{$symb}->{'v.'.$param}=$value;
1256: }
1257: if (untie(%hash)) {
1258: while (my ($symb,$param_hash) = each(%data)) {
1259: while(my ($param,$value) = each (%$param_hash)){
1260: next if ($param =~ /^v\./);
1261: $qresult.=$symb.':'.$param.'='.$value.'&';
1262: }
1263: }
1264: chop($qresult);
1265: print $client "$qresult\n";
1266: } else {
1267: print $client "error:$!\n";
1268: }
1269: } else {
1270: print $client "error:$!\n";
1271: }
1272: # ------------------------------------------------------------------------ dump
1273: } elsif ($userinput =~ /^dump/) {
1274: my ($cmd,$udom,$uname,$namespace,$regexp)
1275: =split(/:/,$userinput);
1276: $namespace=~s/\//\_/g;
1277: $namespace=~s/\W//g;
1278: if (defined($regexp)) {
1279: $regexp=&unescape($regexp);
1280: } else {
1281: $regexp='.';
1282: }
1283: my $qresult='';
1284: my $proname=propath($udom,$uname);
1285: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1286: study($regexp);
1287: while (($key,$value) = each(%hash)) {
1288: if ($regexp eq '.') {
1289: $qresult.=$key.'='.$value.'&';
1290: } else {
1291: my $unescapeKey = &unescape($key);
1292: if (eval('$unescapeKey=~/$regexp/')) {
1293: $qresult.="$key=$value&";
1294: }
1295: }
1296: }
1297: if (untie(%hash)) {
1298: chop($qresult);
1299: print $client "$qresult\n";
1300: } else {
1301: print $client "error:$!\n";
1302: }
1303: } else {
1304: print $client "error:$!\n";
1305: }
1306: # ----------------------------------------------------------------------- store
1307: } elsif ($userinput =~ /^store/) {
1308: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1309: =split(/:/,$userinput);
1310: $namespace=~s/\//\_/g;
1311: $namespace=~s/\W//g;
1312: if ($namespace ne 'roles') {
1313: chomp($what);
1314: my $proname=propath($udom,$uname);
1315: my $now=time;
1316: unless ($namespace=~/^nohist\_/) {
1317: my $hfh;
1318: if (
1319: $hfh=IO::File->new(">>$proname/$namespace.hist")
1320: ) { print $hfh "P:$now:$rid:$what\n"; }
1321: }
1322: my @pairs=split(/\&/,$what);
1323:
1324: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1325: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1326: my $key;
1327: $hash{"version:$rid"}++;
1328: my $version=$hash{"version:$rid"};
1329: my $allkeys='';
1330: foreach $pair (@pairs) {
1331: ($key,$value)=split(/=/,$pair);
1332: $allkeys.=$key.':';
1333: $hash{"$version:$rid:$key"}=$value;
1334: }
1335: $hash{"$version:$rid:timestamp"}=$now;
1336: $allkeys.='timestamp';
1337: $hash{"$version:keys:$rid"}=$allkeys;
1338: if (untie(%hash)) {
1339: print $client "ok\n";
1340: } else {
1341: print $client "error:$!\n";
1342: }
1343: } else {
1344: print $client "error:$!\n";
1345: }
1346: } else {
1347: print $client "refused\n";
1348: }
1349: # --------------------------------------------------------------------- restore
1350: } elsif ($userinput =~ /^restore/) {
1351: my ($cmd,$udom,$uname,$namespace,$rid)
1352: =split(/:/,$userinput);
1353: $namespace=~s/\//\_/g;
1354: $namespace=~s/\W//g;
1355: chomp($rid);
1356: my $proname=propath($udom,$uname);
1357: my $qresult='';
1358: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1359: my $version=$hash{"version:$rid"};
1360: $qresult.="version=$version&";
1361: my $scope;
1362: for ($scope=1;$scope<=$version;$scope++) {
1363: my $vkeys=$hash{"$scope:keys:$rid"};
1364: my @keys=split(/:/,$vkeys);
1365: my $key;
1366: $qresult.="$scope:keys=$vkeys&";
1367: foreach $key (@keys) {
1368: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1369: }
1370: }
1371: if (untie(%hash)) {
1372: $qresult=~s/\&$//;
1373: print $client "$qresult\n";
1374: } else {
1375: print $client "error:$!\n";
1376: }
1377: } else {
1378: print $client "error:$!\n";
1379: }
1380: # -------------------------------------------------------------------- chatsend
1381: } elsif ($userinput =~ /^chatsend/) {
1382: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1383: &chatadd($cdom,$cnum,$newpost);
1384: print $client "ok\n";
1385: # -------------------------------------------------------------------- chatretr
1386: } elsif ($userinput =~ /^chatretr/) {
1387: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1388: my $reply='';
1389: foreach (&getchat($cdom,$cnum)) {
1390: $reply.=&escape($_).':';
1391: }
1392: $reply=~s/\:$//;
1393: print $client $reply."\n";
1394: # ------------------------------------------------------------------- querysend
1395: } elsif ($userinput =~ /^querysend/) {
1396: my ($cmd,$query,
1397: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1398: $query=~s/\n*$//g;
1399: print $client "".
1400: sqlreply("$hostid{$clientip}\&$query".
1401: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1402: # ------------------------------------------------------------------ queryreply
1403: } elsif ($userinput =~ /^queryreply/) {
1404: my ($cmd,$id,$reply)=split(/:/,$userinput);
1405: my $store;
1406: my $execdir=$perlvar{'lonDaemons'};
1407: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1408: $reply=~s/\&/\n/g;
1409: print $store $reply;
1410: close $store;
1411: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1412: print $store2 "done\n";
1413: close $store2;
1414: print $client "ok\n";
1415: }
1416: else {
1417: print $client "error:$!\n";
1418: }
1419: # ----------------------------------------------------------------------- idput
1420: } elsif ($userinput =~ /^idput/) {
1421: my ($cmd,$udom,$what)=split(/:/,$userinput);
1422: chomp($what);
1423: $udom=~s/\W//g;
1424: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1425: my $now=time;
1426: {
1427: my $hfh;
1428: if (
1429: $hfh=IO::File->new(">>$proname.hist")
1430: ) { print $hfh "P:$now:$what\n"; }
1431: }
1432: my @pairs=split(/\&/,$what);
1433: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1434: foreach $pair (@pairs) {
1435: ($key,$value)=split(/=/,$pair);
1436: $hash{$key}=$value;
1437: }
1438: if (untie(%hash)) {
1439: print $client "ok\n";
1440: } else {
1441: print $client "error:$!\n";
1442: }
1443: } else {
1444: print $client "error:$!\n";
1445: }
1446: # ----------------------------------------------------------------------- idget
1447: } elsif ($userinput =~ /^idget/) {
1448: my ($cmd,$udom,$what)=split(/:/,$userinput);
1449: chomp($what);
1450: $udom=~s/\W//g;
1451: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1452: my @queries=split(/\&/,$what);
1453: my $qresult='';
1454: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1455: for ($i=0;$i<=$#queries;$i++) {
1456: $qresult.="$hash{$queries[$i]}&";
1457: }
1458: if (untie(%hash)) {
1459: $qresult=~s/\&$//;
1460: print $client "$qresult\n";
1461: } else {
1462: print $client "error:$!\n";
1463: }
1464: } else {
1465: print $client "error:$!\n";
1466: }
1467: # ---------------------------------------------------------------------- tmpput
1468: } elsif ($userinput =~ /^tmpput/) {
1469: my ($cmd,$what)=split(/:/,$userinput);
1470: my $store;
1471: $tmpsnum++;
1472: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1473: $id=~s/\W/\_/g;
1474: $what=~s/\n//g;
1475: my $execdir=$perlvar{'lonDaemons'};
1476: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1477: print $store $what;
1478: close $store;
1479: print $client "$id\n";
1480: }
1481: else {
1482: print $client "error:$!\n";
1483: }
1484:
1485: # ---------------------------------------------------------------------- tmpget
1486: } elsif ($userinput =~ /^tmpget/) {
1487: my ($cmd,$id)=split(/:/,$userinput);
1488: chomp($id);
1489: $id=~s/\W/\_/g;
1490: my $store;
1491: my $execdir=$perlvar{'lonDaemons'};
1492: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1493: my $reply=<$store>;
1494: print $client "$reply\n";
1495: close $store;
1496: }
1497: else {
1498: print $client "error:$!\n";
1499: }
1500:
1501: # -------------------------------------------------------------------------- ls
1502: } elsif ($userinput =~ /^ls/) {
1503: my ($cmd,$ulsdir)=split(/:/,$userinput);
1504: my $ulsout='';
1505: my $ulsfn;
1506: if (-e $ulsdir) {
1507: if(-d $ulsdir) {
1508: if (opendir(LSDIR,$ulsdir)) {
1509: while ($ulsfn=readdir(LSDIR)) {
1510: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1511: $ulsout.=$ulsfn.'&'.
1512: join('&',@ulsstats).':';
1513: }
1514: closedir(LSDIR);
1515: }
1516: } else {
1517: my @ulsstats=stat($ulsdir);
1518: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1519: }
1520: } else {
1521: $ulsout='no_such_dir';
1522: }
1523: if ($ulsout eq '') { $ulsout='empty'; }
1524: print $client "$ulsout\n";
1525: # ------------------------------------------------------------------ Hanging up
1526: } elsif (($userinput =~ /^exit/) ||
1527: ($userinput =~ /^init/)) {
1528: &logthis(
1529: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1530: print $client "bye\n";
1531: $client->close();
1532: last;
1533: # ------------------------------------------------------------- unknown command
1534: } else {
1535: # unknown command
1536: print $client "unknown_cmd\n";
1537: }
1538: # -------------------------------------------------------------------- complete
1539: alarm(0);
1540: &status('Listening to '.$hostid{$clientip});
1541: }
1542: # --------------------------------------------- client unknown or fishy, refuse
1543: } else {
1544: print $client "refused\n";
1545: $client->close();
1546: &logthis("<font color=blue>WARNING: "
1547: ."Rejected client $clientip, closing connection</font>");
1548: }
1549: }
1550:
1551: # =============================================================================
1552:
1553: &logthis("<font color=red>CRITICAL: "
1554: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1555: # tidy up gracefully and finish
1556:
1557: $server->close();
1558:
1559: # this exit is VERY important, otherwise the child will become
1560: # a producer of more and more children, forking yourself into
1561: # process death.
1562: exit;
1563: }
1564: }
1565:
1566:
1567: #
1568: # Checks to see if the input roleput request was to set
1569: # an author role. If so, invokes the lchtmldir script to set
1570: # up a correct public_html
1571: # Parameters:
1572: # request - The request sent to the rolesput subchunk.
1573: # We're looking for /domain/_au
1574: # domain - The domain in which the user is having roles doctored.
1575: # user - Name of the user for which the role is being put.
1576: # authtype - The authentication type associated with the user.
1577: #
1578: sub ManagePermissions
1579: {
1580: my $request = shift;
1581: my $domain = shift;
1582: my $user = shift;
1583: my $authtype= shift;
1584:
1585: # See if the request is of the form /$domain/_au
1586:
1587: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1588: my $execdir = $perlvar{'lonDaemons'};
1589: my $userhome= "/home/$user" ;
1590: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1591: system("$execdir/lchtmldir $userhome $user $authtype");
1592: }
1593: }
1594: #
1595: # GetAuthType - Determines the authorization type of a user in a domain.
1596:
1597: # Returns the authorization type or nouser if there is no such user.
1598: #
1599: sub GetAuthType
1600: {
1601: my $domain = shift;
1602: my $user = shift;
1603:
1604: Debug("GetAuthType( $domain, $user ) \n");
1605: my $proname = &propath($domain, $user);
1606: my $passwdfile = "$proname/passwd";
1607: if( -e $passwdfile ) {
1608: my $pf = IO::File->new($passwdfile);
1609: my $realpassword = <$pf>;
1610: chomp($realpassword);
1611: Debug("Password info = $realpassword\n");
1612: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1613: Debug("Authtype = $authtype, content = $contentpwd\n");
1614: my $availinfo = '';
1615: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1616: $availinfo = $contentpwd;
1617: }
1618:
1619: return "$authtype:$availinfo";
1620: }
1621: else {
1622: Debug("Returning nouser");
1623: return "nouser";
1624: }
1625: }
1626:
1627: sub addline {
1628: my ($fname,$hostid,$ip,$newline)=@_;
1629: my $contents;
1630: my $found=0;
1631: my $expr='^'.$hostid.':'.$ip.':';
1632: $expr =~ s/\./\\\./g;
1633: if ($sh=IO::File->new("$fname.subscription")) {
1634: while (my $subline=<$sh>) {
1635: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1636: }
1637: $sh->close();
1638: }
1639: $sh=IO::File->new(">$fname.subscription");
1640: if ($contents) { print $sh $contents; }
1641: if ($newline) { print $sh $newline; }
1642: $sh->close();
1643: return $found;
1644: }
1645:
1646: sub getchat {
1647: my ($cdom,$cname)=@_;
1648: my %hash;
1649: my $proname=&propath($cdom,$cname);
1650: my @entries=();
1651: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1652: &GDBM_READER(),0640)) {
1653: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1654: untie %hash;
1655: }
1656: return @entries;
1657: }
1658:
1659: sub chatadd {
1660: my ($cdom,$cname,$newchat)=@_;
1661: my %hash;
1662: my $proname=&propath($cdom,$cname);
1663: my @entries=();
1664: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1665: &GDBM_WRCREAT(),0640)) {
1666: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1667: my $time=time;
1668: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1669: my ($thentime,$idnum)=split(/\_/,$lastid);
1670: my $newid=$time.'_000000';
1671: if ($thentime==$time) {
1672: $idnum=~s/^0+//;
1673: $idnum++;
1674: $idnum=substr('000000'.$idnum,-6,6);
1675: $newid=$time.'_'.$idnum;
1676: }
1677: $hash{$newid}=$newchat;
1678: my $expired=$time-3600;
1679: foreach (keys %hash) {
1680: my ($thistime)=($_=~/(\d+)\_/);
1681: if ($thistime<$expired) {
1682: delete $hash{$_};
1683: }
1684: }
1685: untie %hash;
1686: }
1687: }
1688:
1689: sub unsub {
1690: my ($fname,$clientip)=@_;
1691: my $result;
1692: if (unlink("$fname.$hostid{$clientip}")) {
1693: $result="ok\n";
1694: } else {
1695: $result="not_subscribed\n";
1696: }
1697: if (-e "$fname.subscription") {
1698: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1699: if ($found) { $result="ok\n"; }
1700: } else {
1701: if ($result != "ok\n") { $result="not_subscribed\n"; }
1702: }
1703: return $result;
1704: }
1705:
1706: sub currentversion {
1707: my $fname=shift;
1708: my $version=-1;
1709: my $ulsdir='';
1710: if ($fname=~/^(.+)\/[^\/]+$/) {
1711: $ulsdir=$1;
1712: }
1713: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1714: $fname=~s/\.(\w+(?:\.meta)*)$/\.\(\\d\+\)\.$1\$/;
1715:
1716: if (-e $fname) { $version=1; }
1717: if (-e $ulsdir) {
1718: if(-d $ulsdir) {
1719: if (opendir(LSDIR,$ulsdir)) {
1720: while ($ulsfn=readdir(LSDIR)) {
1721: # see if this is a regular file (ignore links produced earlier)
1722: my $thisfile=$ulsdir.'/'.$ulsfn;
1723: unless (-l $thisfile) {
1724: if ($thisfile=~/$fname/) {
1725: if ($1>$version) { $version=$1; }
1726: }
1727: }
1728: }
1729: closedir(LSDIR);
1730: $version++;
1731: }
1732: }
1733: }
1734: return $version;
1735: }
1736:
1737: sub thisversion {
1738: my $fname=shift;
1739: my $version=-1;
1740: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1741: $version=$1;
1742: }
1743: return $version;
1744: }
1745:
1746: sub subscribe {
1747: my ($userinput,$clientip)=@_;
1748: my $result;
1749: my ($cmd,$fname)=split(/:/,$userinput);
1750: my $ownership=&ishome($fname);
1751: if ($ownership eq 'owner') {
1752: # explitly asking for the current version?
1753: unless (-e $fname) {
1754: my $currentversion=¤tversion($fname);
1755: if (&thisversion($fname)==$currentversion) {
1756: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1757: my $root=$1;
1758: my $extension=$2;
1759: symlink($root.'.'.$extension,
1760: $root.'.'.$currentversion.'.'.$extension);
1761: unless ($extension=~/\.meta$/) {
1762: symlink($root.'.'.$extension.'.meta',
1763: $root.'.'.$currentversion.'.'.$extension.'.meta');
1764: }
1765: }
1766: }
1767: }
1768: if (-e $fname) {
1769: if (-d $fname) {
1770: $result="directory\n";
1771: } else {
1772: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1773: $now=time;
1774: my $found=&addline($fname,$hostid{$clientip},$clientip,
1775: "$hostid{$clientip}:$clientip:$now\n");
1776: if ($found) { $result="$fname\n"; }
1777: # if they were subscribed to only meta data, delete that
1778: # subscription, when you subscribe to a file you also get
1779: # the metadata
1780: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1781: $fname=~s/\/home\/httpd\/html\/res/raw/;
1782: $fname="http://$thisserver/".$fname;
1783: $result="$fname\n";
1784: }
1785: } else {
1786: $result="not_found\n";
1787: }
1788: } else {
1789: $result="rejected\n";
1790: }
1791: return $result;
1792: }
1793:
1794: sub make_passwd_file {
1795: my ($uname, $umode,$npass,$passfilename)=@_;
1796: my $result="ok\n";
1797: if ($umode eq 'krb4' or $umode eq 'krb5') {
1798: {
1799: my $pf = IO::File->new(">$passfilename");
1800: print $pf "$umode:$npass\n";
1801: }
1802: } elsif ($umode eq 'internal') {
1803: my $salt=time;
1804: $salt=substr($salt,6,2);
1805: my $ncpass=crypt($npass,$salt);
1806: {
1807: &Debug("Creating internal auth");
1808: my $pf = IO::File->new(">$passfilename");
1809: print $pf "internal:$ncpass\n";
1810: }
1811: } elsif ($umode eq 'localauth') {
1812: {
1813: my $pf = IO::File->new(">$passfilename");
1814: print $pf "localauth:$npass\n";
1815: }
1816: } elsif ($umode eq 'unix') {
1817: {
1818: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1819: {
1820: &Debug("Executing external: ".$execpath);
1821: &Debug("user = ".$uname.", Password =". $npass);
1822: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
1823: print $se "$uname\n";
1824: print $se "$npass\n";
1825: print $se "$npass\n";
1826: }
1827: my $useraddok = $?;
1828: if($useraddok > 0) {
1829: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1830: }
1831: my $pf = IO::File->new(">$passfilename");
1832: print $pf "unix:\n";
1833: }
1834: } elsif ($umode eq 'none') {
1835: {
1836: my $pf = IO::File->new(">$passfilename");
1837: print $pf "none:\n";
1838: }
1839: } else {
1840: $result="auth_mode_error\n";
1841: }
1842: return $result;
1843: }
1844:
1845: # ----------------------------------- POD (plain old documentation, CPAN style)
1846:
1847: =head1 NAME
1848:
1849: lond - "LON Daemon" Server (port "LOND" 5663)
1850:
1851: =head1 SYNOPSIS
1852:
1853: Usage: B<lond>
1854:
1855: Should only be run as user=www. This is a command-line script which
1856: is invoked by B<loncron>. There is no expectation that a typical user
1857: will manually start B<lond> from the command-line. (In other words,
1858: DO NOT START B<lond> YOURSELF.)
1859:
1860: =head1 DESCRIPTION
1861:
1862: There are two characteristics associated with the running of B<lond>,
1863: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1864: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1865: subscriptions, etc). These are described in two large
1866: sections below.
1867:
1868: B<PROCESS MANAGEMENT>
1869:
1870: Preforker - server who forks first. Runs as a daemon. HUPs.
1871: Uses IDEA encryption
1872:
1873: B<lond> forks off children processes that correspond to the other servers
1874: in the network. Management of these processes can be done at the
1875: parent process level or the child process level.
1876:
1877: B<logs/lond.log> is the location of log messages.
1878:
1879: The process management is now explained in terms of linux shell commands,
1880: subroutines internal to this code, and signal assignments:
1881:
1882: =over 4
1883:
1884: =item *
1885:
1886: PID is stored in B<logs/lond.pid>
1887:
1888: This is the process id number of the parent B<lond> process.
1889:
1890: =item *
1891:
1892: SIGTERM and SIGINT
1893:
1894: Parent signal assignment:
1895: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1896:
1897: Child signal assignment:
1898: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1899: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1900: to restart a new child.)
1901:
1902: Command-line invocations:
1903: B<kill> B<-s> SIGTERM I<PID>
1904: B<kill> B<-s> SIGINT I<PID>
1905:
1906: Subroutine B<HUNTSMAN>:
1907: This is only invoked for the B<lond> parent I<PID>.
1908: This kills all the children, and then the parent.
1909: The B<lonc.pid> file is cleared.
1910:
1911: =item *
1912:
1913: SIGHUP
1914:
1915: Current bug:
1916: This signal can only be processed the first time
1917: on the parent process. Subsequent SIGHUP signals
1918: have no effect.
1919:
1920: Parent signal assignment:
1921: $SIG{HUP} = \&HUPSMAN;
1922:
1923: Child signal assignment:
1924: none (nothing happens)
1925:
1926: Command-line invocations:
1927: B<kill> B<-s> SIGHUP I<PID>
1928:
1929: Subroutine B<HUPSMAN>:
1930: This is only invoked for the B<lond> parent I<PID>,
1931: This kills all the children, and then the parent.
1932: The B<lond.pid> file is cleared.
1933:
1934: =item *
1935:
1936: SIGUSR1
1937:
1938: Parent signal assignment:
1939: $SIG{USR1} = \&USRMAN;
1940:
1941: Child signal assignment:
1942: $SIG{USR1}= \&logstatus;
1943:
1944: Command-line invocations:
1945: B<kill> B<-s> SIGUSR1 I<PID>
1946:
1947: Subroutine B<USRMAN>:
1948: When invoked for the B<lond> parent I<PID>,
1949: SIGUSR1 is sent to all the children, and the status of
1950: each connection is logged.
1951:
1952: =item *
1953:
1954: SIGCHLD
1955:
1956: Parent signal assignment:
1957: $SIG{CHLD} = \&REAPER;
1958:
1959: Child signal assignment:
1960: none
1961:
1962: Command-line invocations:
1963: B<kill> B<-s> SIGCHLD I<PID>
1964:
1965: Subroutine B<REAPER>:
1966: This is only invoked for the B<lond> parent I<PID>.
1967: Information pertaining to the child is removed.
1968: The socket port is cleaned up.
1969:
1970: =back
1971:
1972: B<SERVER-SIDE ACTIVITIES>
1973:
1974: Server-side information can be accepted in an encrypted or non-encrypted
1975: method.
1976:
1977: =over 4
1978:
1979: =item ping
1980:
1981: Query a client in the hosts.tab table; "Are you there?"
1982:
1983: =item pong
1984:
1985: Respond to a ping query.
1986:
1987: =item ekey
1988:
1989: Read in encrypted key, make cipher. Respond with a buildkey.
1990:
1991: =item load
1992:
1993: Respond with CPU load based on a computation upon /proc/loadavg.
1994:
1995: =item currentauth
1996:
1997: Reply with current authentication information (only over an
1998: encrypted channel).
1999:
2000: =item auth
2001:
2002: Only over an encrypted channel, reply as to whether a user's
2003: authentication information can be validated.
2004:
2005: =item passwd
2006:
2007: Allow for a password to be set.
2008:
2009: =item makeuser
2010:
2011: Make a user.
2012:
2013: =item passwd
2014:
2015: Allow for authentication mechanism and password to be changed.
2016:
2017: =item home
2018:
2019: Respond to a question "are you the home for a given user?"
2020:
2021: =item update
2022:
2023: Update contents of a subscribed resource.
2024:
2025: =item unsubscribe
2026:
2027: The server is unsubscribing from a resource.
2028:
2029: =item subscribe
2030:
2031: The server is subscribing to a resource.
2032:
2033: =item log
2034:
2035: Place in B<logs/lond.log>
2036:
2037: =item put
2038:
2039: stores hash in namespace
2040:
2041: =item rolesput
2042:
2043: put a role into a user's environment
2044:
2045: =item get
2046:
2047: returns hash with keys from array
2048: reference filled in from namespace
2049:
2050: =item eget
2051:
2052: returns hash with keys from array
2053: reference filled in from namesp (encrypts the return communication)
2054:
2055: =item rolesget
2056:
2057: get a role from a user's environment
2058:
2059: =item del
2060:
2061: deletes keys out of array from namespace
2062:
2063: =item keys
2064:
2065: returns namespace keys
2066:
2067: =item dump
2068:
2069: dumps the complete (or key matching regexp) namespace into a hash
2070:
2071: =item store
2072:
2073: stores hash permanently
2074: for this url; hashref needs to be given and should be a \%hashname; the
2075: remaining args aren't required and if they aren't passed or are '' they will
2076: be derived from the ENV
2077:
2078: =item restore
2079:
2080: returns a hash for a given url
2081:
2082: =item querysend
2083:
2084: Tells client about the lonsql process that has been launched in response
2085: to a sent query.
2086:
2087: =item queryreply
2088:
2089: Accept information from lonsql and make appropriate storage in temporary
2090: file space.
2091:
2092: =item idput
2093:
2094: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2095: for each student, defined perhaps by the institutional Registrar.)
2096:
2097: =item idget
2098:
2099: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2100: for each student, defined perhaps by the institutional Registrar.)
2101:
2102: =item tmpput
2103:
2104: Accept and store information in temporary space.
2105:
2106: =item tmpget
2107:
2108: Send along temporarily stored information.
2109:
2110: =item ls
2111:
2112: List part of a user's directory.
2113:
2114: =item Hanging up (exit or init)
2115:
2116: What to do when a client tells the server that they (the client)
2117: are leaving the network.
2118:
2119: =item unknown command
2120:
2121: If B<lond> is sent an unknown command (not in the list above),
2122: it replys to the client "unknown_cmd".
2123:
2124: =item UNKNOWN CLIENT
2125:
2126: If the anti-spoofing algorithm cannot verify the client,
2127: the client is rejected (with a "refused" message sent
2128: to the client, and the connection is closed.
2129:
2130: =back
2131:
2132: =head1 PREREQUISITES
2133:
2134: IO::Socket
2135: IO::File
2136: Apache::File
2137: Symbol
2138: POSIX
2139: Crypt::IDEA
2140: LWP::UserAgent()
2141: GDBM_File
2142: Authen::Krb4
2143: Authen::Krb5
2144:
2145: =head1 COREQUISITES
2146:
2147: =head1 OSNAMES
2148:
2149: linux
2150:
2151: =head1 SCRIPT CATEGORIES
2152:
2153: Server/Process
2154:
2155: =cut
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