File:
[LON-CAPA] /
loncom /
lond
Revision
1.112:
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Fri Mar 7 15:04:00 2003 UTC (21 years, 1 month ago) by
matthew
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CVS tags:
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Since GDBM does not bother to check to see if the file it wants exists before
trying to open it a 'bad block error' will result when a non-existant file
is tied. lond now reports: "error:No such file or GDBM reported bad block
error\n" when this occurs on a 'get' call so we don't bother logging the
error every time a file is requested that does not exist.
&Apache::lonnet::EXT() in particular expects an error of this form.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: #
5: # $Id: lond,v 1.112 2003/03/07 15:04:00 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: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
35: # 12/05,12/13,12/29 Gerd Kortemeyer
36: # YEAR=2001
37: # 02/12 Gerd Kortemeyer
38: # 03/24 Gerd Kortemeyer
39: # 05/11,05/28,08/30 Gerd Kortemeyer
40: # 11/26,11/27 Gerd Kortemeyer
41: # 12/22 Gerd Kortemeyer
42: # YEAR=2002
43: # 01/20/02,02/05 Gerd Kortemeyer
44: # 02/05 Guy Albertelli
45: # 02/12 Gerd Kortemeyer
46: # 02/19 Matthew Hall
47: # 02/25 Gerd Kortemeyer
48: # 01/xx/2003 Ron Fox.. Remove preforking. This makes the general daemon
49: # logic simpler (and there were problems maintaining the preforked
50: # population). Since the time averaged connection rate is close to zero
51: # because lonc's purpose is to maintain near continuous connnections,
52: # preforking is not really needed.
53: ###
54:
55:
56: use lib '/home/httpd/lib/perl/';
57: use LONCAPA::Configuration;
58:
59: use IO::Socket;
60: use IO::File;
61: use Apache::File;
62: use Symbol;
63: use POSIX;
64: use Crypt::IDEA;
65: use LWP::UserAgent();
66: use GDBM_File;
67: use Authen::Krb4;
68: use Authen::Krb5;
69: use lib '/home/httpd/lib/perl/';
70: use localauth;
71:
72: my $DEBUG = 0; # Non zero to enable debug log entries.
73:
74: my $status='';
75: my $lastlog='';
76:
77: #
78: # The array below are password error strings."
79: #
80: my $lastpwderror = 13; # Largest error number from lcpasswd.
81: my @passwderrors = ("ok",
82: "lcpasswd must be run as user 'www'",
83: "lcpasswd got incorrect number of arguments",
84: "lcpasswd did not get the right nubmer of input text lines",
85: "lcpasswd too many simultaneous pwd changes in progress",
86: "lcpasswd User does not exist.",
87: "lcpasswd Incorrect current passwd",
88: "lcpasswd Unable to su to root.",
89: "lcpasswd Cannot set new passwd.",
90: "lcpasswd Username has invalid characters",
91: "lcpasswd Invalid characters in password",
92: "11", "12",
93: "lcpasswd Password mismatch");
94:
95:
96: # The array below are lcuseradd error strings.:
97:
98: my $lastadderror = 13;
99: my @adderrors = ("ok",
100: "User ID mismatch, lcuseradd must run as user www",
101: "lcuseradd Incorrect number of command line parameters must be 3",
102: "lcuseradd Incorrect number of stdinput lines, must be 3",
103: "lcuseradd Too many other simultaneous pwd changes in progress",
104: "lcuseradd User does not exist",
105: "lcuseradd Unabel to mak ewww member of users's group",
106: "lcuseradd Unable to su to root",
107: "lcuseradd Unable to set password",
108: "lcuseradd Usrname has invbalid charcters",
109: "lcuseradd Password has an invalid character",
110: "lcuseradd User already exists",
111: "lcuseradd Could not add user.",
112: "lcuseradd Password mismatch");
113:
114:
115: #
116: # Convert an error return code from lcpasswd to a string value.
117: #
118: sub lcpasswdstrerror {
119: my $ErrorCode = shift;
120: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
121: return "lcpasswd Unrecognized error return value ".$ErrorCode;
122: } else {
123: return $passwderrors[$ErrorCode];
124: }
125: }
126:
127: #
128: # Convert an error return code from lcuseradd to a string value:
129: #
130: sub lcuseraddstrerror {
131: my $ErrorCode = shift;
132: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
133: return "lcuseradd - Unrecognized error code: ".$ErrorCode;
134: } else {
135: return $adderrors[$ErrorCode];
136: }
137: }
138:
139: # grabs exception and records it to log before exiting
140: sub catchexception {
141: my ($error)=@_;
142: $SIG{'QUIT'}='DEFAULT';
143: $SIG{__DIE__}='DEFAULT';
144: &logthis("<font color=red>CRITICAL: "
145: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
146: ."a crash with this error msg->[$error]</font>");
147: &logthis('Famous last words: '.$status.' - '.$lastlog);
148: if ($client) { print $client "error: $error\n"; }
149: $server->close();
150: die($error);
151: }
152:
153: sub timeout {
154: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
155: &catchexception('Timeout');
156: }
157: # -------------------------------- Set signal handlers to record abnormal exits
158:
159: $SIG{'QUIT'}=\&catchexception;
160: $SIG{__DIE__}=\&catchexception;
161:
162: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
163: &status("Read loncapa.conf and loncapa_apache.conf");
164: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
165: my %perlvar=%{$perlvarref};
166: undef $perlvarref;
167:
168: # ----------------------------- Make sure this process is running from user=www
169: my $wwwid=getpwnam('www');
170: if ($wwwid!=$<) {
171: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
172: $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
173: system("echo 'User ID mismatch. lond must be run as user www.' |\
174: mailto $emailto -s '$subj' > /dev/null");
175: exit 1;
176: }
177:
178: # --------------------------------------------- Check if other instance running
179:
180: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
181:
182: if (-e $pidfile) {
183: my $lfh=IO::File->new("$pidfile");
184: my $pide=<$lfh>;
185: chomp($pide);
186: if (kill 0 => $pide) { die "already running"; }
187: }
188:
189: $PREFORK=4; # number of children to maintain, at least four spare
190:
191: # ------------------------------------------------------------- Read hosts file
192:
193: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
194:
195: while ($configline=<CONFIG>) {
196: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
197: chomp($ip); $ip=~s/\D+$//;
198: $hostid{$ip}=$id;
199: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
200: $PREFORK++;
201: }
202: close(CONFIG);
203:
204: # establish SERVER socket, bind and listen.
205: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
206: Type => SOCK_STREAM,
207: Proto => 'tcp',
208: Reuse => 1,
209: Listen => 10 )
210: or die "making socket: $@\n";
211:
212: # --------------------------------------------------------- Do global variables
213:
214: # global variables
215:
216: $MAX_CLIENTS_PER_CHILD = 50; # number of clients each child should
217: # process
218: %children = (); # keys are current child process IDs
219: $children = 0; # current number of children
220:
221: sub REAPER { # takes care of dead children
222: $SIG{CHLD} = \&REAPER;
223: my $pid = wait;
224: if (defined($children{$pid})) {
225: &logthis("Child $pid died");
226: $children --;
227: delete $children{$pid};
228: } else {
229: &logthis("Unknown Child $pid died");
230: }
231: }
232:
233: sub HUNTSMAN { # signal handler for SIGINT
234: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
235: kill 'INT' => keys %children;
236: &logthis("Free socket: ".shutdown($server,2)); # free up socket
237: my $execdir=$perlvar{'lonDaemons'};
238: unlink("$execdir/logs/lond.pid");
239: &logthis("<font color=red>CRITICAL: Shutting down</font>");
240: exit; # clean up with dignity
241: }
242:
243: sub HUPSMAN { # signal handler for SIGHUP
244: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
245: kill 'INT' => keys %children;
246: &logthis("Free socket: ".shutdown($server,2)); # free up socket
247: &logthis("<font color=red>CRITICAL: Restarting</font>");
248: unlink("$execdir/logs/lond.pid");
249: my $execdir=$perlvar{'lonDaemons'};
250: exec("$execdir/lond"); # here we go again
251: }
252:
253: sub checkchildren {
254: &initnewstatus();
255: &logstatus();
256: &logthis('Going to check on the children');
257: $docdir=$perlvar{'lonDocRoot'};
258: foreach (sort keys %children) {
259: sleep 1;
260: unless (kill 'USR1' => $_) {
261: &logthis ('Child '.$_.' is dead');
262: &logstatus($$.' is dead');
263: }
264: }
265: sleep 5;
266: foreach (sort keys %children) {
267: unless (-e "$docdir/lon-status/londchld/$_.txt") {
268: &logthis('Child '.$_.' did not respond');
269: kill 9 => $_;
270: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
271: $subj="LON: $perlvar{'lonHostID'} killed lond process $_";
272: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
273: $execdir=$perlvar{'lonDaemons'};
274: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`
275: }
276: }
277: }
278:
279: # --------------------------------------------------------------------- Logging
280:
281: sub logthis {
282: my $message=shift;
283: my $execdir=$perlvar{'lonDaemons'};
284: my $fh=IO::File->new(">>$execdir/logs/lond.log");
285: my $now=time;
286: my $local=localtime($now);
287: $lastlog=$local.': '.$message;
288: print $fh "$local ($$): $message\n";
289: }
290:
291: # ------------------------- Conditional log if $DEBUG true.
292: sub Debug {
293: my $message = shift;
294: if($DEBUG) {
295: &logthis($message);
296: }
297: }
298: # ------------------------------------------------------------------ Log status
299:
300: sub logstatus {
301: my $docdir=$perlvar{'lonDocRoot'};
302: {
303: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
304: print $fh $$."\t".$status."\t".$lastlog."\n";
305: $fh->close();
306: }
307: {
308: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
309: print $fh $status."\n".$lastlog."\n".time;
310: $fh->close();
311: }
312: }
313:
314: sub initnewstatus {
315: my $docdir=$perlvar{'lonDocRoot'};
316: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
317: my $now=time;
318: my $local=localtime($now);
319: print $fh "LOND status $local - parent $$\n\n";
320: opendir(DIR,"$docdir/lon-status/londchld");
321: while ($filename=readdir(DIR)) {
322: unlink("$docdir/lon-status/londchld/$filename");
323: }
324: closedir(DIR);
325: }
326:
327: # -------------------------------------------------------------- Status setting
328:
329: sub status {
330: my $what=shift;
331: my $now=time;
332: my $local=localtime($now);
333: $status=$local.': '.$what;
334: $0='lond: '.$what.' '.$local;
335: }
336:
337: # -------------------------------------------------------- Escape Special Chars
338:
339: sub escape {
340: my $str=shift;
341: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
342: return $str;
343: }
344:
345: # ----------------------------------------------------- Un-Escape Special Chars
346:
347: sub unescape {
348: my $str=shift;
349: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
350: return $str;
351: }
352:
353: # ----------------------------------------------------------- Send USR1 to lonc
354:
355: sub reconlonc {
356: my $peerfile=shift;
357: &logthis("Trying to reconnect for $peerfile");
358: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
359: if (my $fh=IO::File->new("$loncfile")) {
360: my $loncpid=<$fh>;
361: chomp($loncpid);
362: if (kill 0 => $loncpid) {
363: &logthis("lonc at pid $loncpid responding, sending USR1");
364: kill USR1 => $loncpid;
365: sleep 5;
366: if (-e "$peerfile") { return; }
367: &logthis("$peerfile still not there, give it another try");
368: sleep 10;
369: if (-e "$peerfile") { return; }
370: &logthis(
371: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
372: } else {
373: &logthis(
374: "<font color=red>CRITICAL: "
375: ."lonc at pid $loncpid not responding, giving up</font>");
376: }
377: } else {
378: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
379: }
380: }
381:
382: # -------------------------------------------------- Non-critical communication
383:
384: sub subreply {
385: my ($cmd,$server)=@_;
386: my $peerfile="$perlvar{'lonSockDir'}/$server";
387: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
388: Type => SOCK_STREAM,
389: Timeout => 10)
390: or return "con_lost";
391: print $sclient "$cmd\n";
392: my $answer=<$sclient>;
393: chomp($answer);
394: if (!$answer) { $answer="con_lost"; }
395: return $answer;
396: }
397:
398: sub reply {
399: my ($cmd,$server)=@_;
400: my $answer;
401: if ($server ne $perlvar{'lonHostID'}) {
402: $answer=subreply($cmd,$server);
403: if ($answer eq 'con_lost') {
404: $answer=subreply("ping",$server);
405: if ($answer ne $server) {
406: &logthis("sub reply: answer != server");
407: &reconlonc("$perlvar{'lonSockDir'}/$server");
408: }
409: $answer=subreply($cmd,$server);
410: }
411: } else {
412: $answer='self_reply';
413: }
414: return $answer;
415: }
416:
417: # -------------------------------------------------------------- Talk to lonsql
418:
419: sub sqlreply {
420: my ($cmd)=@_;
421: my $answer=subsqlreply($cmd);
422: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
423: return $answer;
424: }
425:
426: sub subsqlreply {
427: my ($cmd)=@_;
428: my $unixsock="mysqlsock";
429: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
430: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
431: Type => SOCK_STREAM,
432: Timeout => 10)
433: or return "con_lost";
434: print $sclient "$cmd\n";
435: my $answer=<$sclient>;
436: chomp($answer);
437: if (!$answer) { $answer="con_lost"; }
438: return $answer;
439: }
440:
441: # -------------------------------------------- Return path to profile directory
442:
443: sub propath {
444: my ($udom,$uname)=@_;
445: $udom=~s/\W//g;
446: $uname=~s/\W//g;
447: my $subdir=$uname.'__';
448: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
449: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
450: return $proname;
451: }
452:
453: # --------------------------------------- Is this the home server of an author?
454:
455: sub ishome {
456: my $author=shift;
457: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
458: my ($udom,$uname)=split(/\//,$author);
459: my $proname=propath($udom,$uname);
460: if (-e $proname) {
461: return 'owner';
462: } else {
463: return 'not_owner';
464: }
465: }
466:
467: # ======================================================= Continue main program
468: # ---------------------------------------------------- Fork once and dissociate
469:
470: $fpid=fork;
471: exit if $fpid;
472: die "Couldn't fork: $!" unless defined ($fpid);
473:
474: POSIX::setsid() or die "Can't start new session: $!";
475:
476: # ------------------------------------------------------- Write our PID on disk
477:
478: $execdir=$perlvar{'lonDaemons'};
479: open (PIDSAVE,">$execdir/logs/lond.pid");
480: print PIDSAVE "$$\n";
481: close(PIDSAVE);
482: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
483: &status('Starting');
484:
485:
486:
487: # ----------------------------------------------------- Install signal handlers
488:
489:
490: $SIG{CHLD} = \&REAPER;
491: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
492: $SIG{HUP} = \&HUPSMAN;
493: $SIG{USR1} = \&checkchildren;
494:
495:
496:
497: # --------------------------------------------------------------
498: # Accept connections. When a connection comes in, it is validated
499: # and if good, a child process is created to process transactions
500: # along the connection.
501:
502: while (1) {
503: $client = $server->accept() or next;
504: make_new_child($client);
505: }
506:
507: sub make_new_child {
508: my $client;
509: my $pid;
510: my $cipher;
511: my $sigset;
512:
513: $client = shift;
514: &logthis("Attempting to start child");
515: # block signal for fork
516: $sigset = POSIX::SigSet->new(SIGINT);
517: sigprocmask(SIG_BLOCK, $sigset)
518: or die "Can't block SIGINT for fork: $!\n";
519:
520: die "fork: $!" unless defined ($pid = fork);
521:
522: if ($pid) {
523: # Parent records the child's birth and returns.
524: sigprocmask(SIG_UNBLOCK, $sigset)
525: or die "Can't unblock SIGINT for fork: $!\n";
526: $children{$pid} = 1;
527: $children++;
528: &status('Started child '.$pid);
529: return;
530: } else {
531: # Child can *not* return from this subroutine.
532: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
533: $SIG{USR1}= \&logstatus;
534: $SIG{ALRM}= \&timeout;
535: $lastlog='Forked ';
536: $status='Forked';
537:
538: # unblock signals
539: sigprocmask(SIG_UNBLOCK, $sigset)
540: or die "Can't unblock SIGINT for fork: $!\n";
541:
542: $tmpsnum=0;
543: #---------------------------------------------------- kerberos 5 initialization
544: &Authen::Krb5::init_context();
545: &Authen::Krb5::init_ets();
546:
547: &status('Accepted connection');
548: # =============================================================================
549: # do something with the connection
550: # -----------------------------------------------------------------------------
551: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
552: # connection liveness.
553: # see if we know client and check for spoof IP by challenge
554: my $caller = getpeername($client);
555: my ($port,$iaddr)=unpack_sockaddr_in($caller);
556: my $clientip=inet_ntoa($iaddr);
557: my $clientrec=($hostid{$clientip} ne undef);
558: &logthis(
559: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
560: );
561: &status("Connecting $clientip ($hostid{$clientip})");
562: my $clientok;
563: if ($clientrec) {
564: &status("Waiting for init from $clientip ($hostid{$clientip})");
565: my $remotereq=<$client>;
566: $remotereq=~s/\W//g;
567: if ($remotereq eq 'init') {
568: my $challenge="$$".time;
569: print $client "$challenge\n";
570: &status(
571: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
572: $remotereq=<$client>;
573: $remotereq=~s/\W//g;
574: if ($challenge eq $remotereq) {
575: $clientok=1;
576: print $client "ok\n";
577: } else {
578: &logthis(
579: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
580: &status('No challenge reply '.$clientip);
581: }
582: } else {
583: &logthis(
584: "<font color=blue>WARNING: "
585: ."$clientip failed to initialize: >$remotereq< </font>");
586: &status('No init '.$clientip);
587: }
588: } else {
589: &logthis(
590: "<font color=blue>WARNING: Unknown client $clientip</font>");
591: &status('Hung up on '.$clientip);
592: }
593: if ($clientok) {
594: # ---------------- New known client connecting, could mean machine online again
595:
596: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
597: &logthis(
598: "<font color=green>Established connection: $hostid{$clientip}</font>");
599: &status('Will listen to '.$hostid{$clientip});
600: # ------------------------------------------------------------ Process requests
601: while (my $userinput=<$client>) {
602: chomp($userinput);
603: Debug("Request = $userinput\n");
604: &status('Processing '.$hostid{$clientip}.': '.$userinput);
605: my $wasenc=0;
606: alarm(120);
607: # ------------------------------------------------------------ See if encrypted
608: if ($userinput =~ /^enc/) {
609: if ($cipher) {
610: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
611: $userinput='';
612: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
613: $userinput.=
614: $cipher->decrypt(
615: pack("H16",substr($encinput,$encidx,16))
616: );
617: }
618: $userinput=substr($userinput,0,$cmdlength);
619: $wasenc=1;
620: }
621: }
622:
623: # ------------------------------------------------------------- Normal commands
624: # ------------------------------------------------------------------------ ping
625: if ($userinput =~ /^ping/) {
626: print $client "$perlvar{'lonHostID'}\n";
627: # ------------------------------------------------------------------------ pong
628: } elsif ($userinput =~ /^pong/) {
629: $reply=reply("ping",$hostid{$clientip});
630: print $client "$perlvar{'lonHostID'}:$reply\n";
631: # ------------------------------------------------------------------------ ekey
632: } elsif ($userinput =~ /^ekey/) {
633: my $buildkey=time.$$.int(rand 100000);
634: $buildkey=~tr/1-6/A-F/;
635: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
636: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
637: $key=~tr/a-z/A-Z/;
638: $key=~tr/G-P/0-9/;
639: $key=~tr/Q-Z/0-9/;
640: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
641: $key=substr($key,0,32);
642: my $cipherkey=pack("H32",$key);
643: $cipher=new IDEA $cipherkey;
644: print $client "$buildkey\n";
645: # ------------------------------------------------------------------------ load
646: } elsif ($userinput =~ /^load/) {
647: my $loadavg;
648: {
649: my $loadfile=IO::File->new('/proc/loadavg');
650: $loadavg=<$loadfile>;
651: }
652: $loadavg =~ s/\s.*//g;
653: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
654: print $client "$loadpercent\n";
655: # ----------------------------------------------------------------- currentauth
656: } elsif ($userinput =~ /^currentauth/) {
657: if ($wasenc==1) {
658: my ($cmd,$udom,$uname)=split(/:/,$userinput);
659: my $result = GetAuthType($udom, $uname);
660: if($result eq "nouser") {
661: print $client "unknown_user\n";
662: }
663: else {
664: print $client "$result\n"
665: }
666: } else {
667: print $client "refused\n";
668: }
669: # ------------------------------------------------------------------------ auth
670: } elsif ($userinput =~ /^auth/) {
671: if ($wasenc==1) {
672: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
673: chomp($upass);
674: $upass=unescape($upass);
675: my $proname=propath($udom,$uname);
676: my $passfilename="$proname/passwd";
677: if (-e $passfilename) {
678: my $pf = IO::File->new($passfilename);
679: my $realpasswd=<$pf>;
680: chomp($realpasswd);
681: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
682: my $pwdcorrect=0;
683: if ($howpwd eq 'internal') {
684: &Debug("Internal auth");
685: $pwdcorrect=
686: (crypt($upass,$contentpwd) eq $contentpwd);
687: } elsif ($howpwd eq 'unix') {
688: &Debug("Unix auth");
689: if((getpwnam($uname))[1] eq "") { #no such user!
690: $pwdcorrect = 0;
691: } else {
692: $contentpwd=(getpwnam($uname))[1];
693: my $pwauth_path="/usr/local/sbin/pwauth";
694: unless ($contentpwd eq 'x') {
695: $pwdcorrect=
696: (crypt($upass,$contentpwd) eq
697: $contentpwd);
698: }
699:
700: elsif (-e $pwauth_path) {
701: open PWAUTH, "|$pwauth_path" or
702: die "Cannot invoke authentication";
703: print PWAUTH "$uname\n$upass\n";
704: close PWAUTH;
705: $pwdcorrect=!$?;
706: }
707: }
708: } elsif ($howpwd eq 'krb4') {
709: $null=pack("C",0);
710: unless ($upass=~/$null/) {
711: my $krb4_error = &Authen::Krb4::get_pw_in_tkt
712: ($uname,"",$contentpwd,'krbtgt',
713: $contentpwd,1,$upass);
714: if (!$krb4_error) {
715: $pwdcorrect = 1;
716: } else {
717: $pwdcorrect=0;
718: # log error if it is not a bad password
719: if ($krb4_error != 62) {
720: &logthis('krb4:'.$uname.','.$contentpwd.','.
721: &Authen::Krb4::get_err_txt($Authen::Krb4::error));
722: }
723: }
724: }
725: } elsif ($howpwd eq 'krb5') {
726: $null=pack("C",0);
727: unless ($upass=~/$null/) {
728: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
729: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
730: my $krbserver=&Authen::Krb5::parse_name($krbservice);
731: my $credentials=&Authen::Krb5::cc_default();
732: $credentials->initialize($krbclient);
733: my $krbreturn =
734: &Authen::Krb5::get_in_tkt_with_password(
735: $krbclient,$krbserver,$upass,$credentials);
736: # unless ($krbreturn) {
737: # &logthis("Krb5 Error: ".
738: # &Authen::Krb5::error());
739: # }
740: $pwdcorrect = ($krbreturn == 1);
741: } else { $pwdcorrect=0; }
742: } elsif ($howpwd eq 'localauth') {
743: $pwdcorrect=&localauth::localauth($uname,$upass,
744: $contentpwd);
745: }
746: if ($pwdcorrect) {
747: print $client "authorized\n";
748: } else {
749: print $client "non_authorized\n";
750: }
751: } else {
752: print $client "unknown_user\n";
753: }
754: } else {
755: print $client "refused\n";
756: }
757: # ---------------------------------------------------------------------- passwd
758: } elsif ($userinput =~ /^passwd/) {
759: if ($wasenc==1) {
760: my
761: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
762: chomp($npass);
763: $upass=&unescape($upass);
764: $npass=&unescape($npass);
765: &Debug("Trying to change password for $uname");
766: my $proname=propath($udom,$uname);
767: my $passfilename="$proname/passwd";
768: if (-e $passfilename) {
769: my $realpasswd;
770: { my $pf = IO::File->new($passfilename);
771: $realpasswd=<$pf>; }
772: chomp($realpasswd);
773: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
774: if ($howpwd eq 'internal') {
775: &Debug("internal auth");
776: if (crypt($upass,$contentpwd) eq $contentpwd) {
777: my $salt=time;
778: $salt=substr($salt,6,2);
779: my $ncpass=crypt($npass,$salt);
780: { my $pf = IO::File->new(">$passfilename");
781: print $pf "internal:$ncpass\n"; }
782: &logthis("Result of password change for $uname: pwchange_success");
783: print $client "ok\n";
784: } else {
785: print $client "non_authorized\n";
786: }
787: } elsif ($howpwd eq 'unix') {
788: # Unix means we have to access /etc/password
789: # one way or another.
790: # First: Make sure the current password is
791: # correct
792: &Debug("auth is unix");
793: $contentpwd=(getpwnam($uname))[1];
794: my $pwdcorrect = "0";
795: my $pwauth_path="/usr/local/sbin/pwauth";
796: unless ($contentpwd eq 'x') {
797: $pwdcorrect=
798: (crypt($upass,$contentpwd) eq $contentpwd);
799: } elsif (-e $pwauth_path) {
800: open PWAUTH, "|$pwauth_path" or
801: die "Cannot invoke authentication";
802: print PWAUTH "$uname\n$upass\n";
803: close PWAUTH;
804: &Debug("exited pwauth with $? ($uname,$upass) ");
805: $pwdcorrect=($? == 0);
806: }
807: if ($pwdcorrect) {
808: my $execdir=$perlvar{'lonDaemons'};
809: &Debug("Opening lcpasswd pipeline");
810: my $pf = IO::File->new("|$execdir/lcpasswd > /home/www/lcpasswd.log");
811: print $pf "$uname\n$npass\n$npass\n";
812: close $pf;
813: my $err = $?;
814: my $result = ($err>0 ? 'pwchange_failure'
815: : 'ok');
816: &logthis("Result of password change for $uname: ".
817: &lcpasswdstrerror($?));
818: print $client "$result\n";
819: } else {
820: print $client "non_authorized\n";
821: }
822: } else {
823: print $client "auth_mode_error\n";
824: }
825: } else {
826: print $client "unknown_user\n";
827: }
828: } else {
829: print $client "refused\n";
830: }
831: # -------------------------------------------------------------------- makeuser
832: } elsif ($userinput =~ /^makeuser/) {
833: &Debug("Make user received");
834: my $oldumask=umask(0077);
835: if ($wasenc==1) {
836: my
837: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
838: &Debug("cmd =".$cmd." $udom =".$udom.
839: " uname=".$uname);
840: chomp($npass);
841: $npass=&unescape($npass);
842: my $proname=propath($udom,$uname);
843: my $passfilename="$proname/passwd";
844: &Debug("Password file created will be:".
845: $passfilename);
846: if (-e $passfilename) {
847: print $client "already_exists\n";
848: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
849: print $client "not_right_domain\n";
850: } else {
851: @fpparts=split(/\//,$proname);
852: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
853: $fperror='';
854: for ($i=3;$i<=$#fpparts;$i++) {
855: $fpnow.='/'.$fpparts[$i];
856: unless (-e $fpnow) {
857: unless (mkdir($fpnow,0777)) {
858: $fperror="error: ".($!+0)
859: ." mkdir failed while attempting "
860: ."makeuser\n";
861: }
862: }
863: }
864: unless ($fperror) {
865: my $result=&make_passwd_file($uname, $umode,$npass,
866: $passfilename);
867: print $client $result;
868: } else {
869: print $client "$fperror\n";
870: }
871: }
872: } else {
873: print $client "refused\n";
874: }
875: umask($oldumask);
876: # -------------------------------------------------------------- changeuserauth
877: } elsif ($userinput =~ /^changeuserauth/) {
878: &Debug("Changing authorization");
879: if ($wasenc==1) {
880: my
881: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
882: chomp($npass);
883: &Debug("cmd = ".$cmd." domain= ".$udom.
884: "uname =".$uname." umode= ".$umode);
885: $npass=&unescape($npass);
886: my $proname=&propath($udom,$uname);
887: my $passfilename="$proname/passwd";
888: if ($udom ne $perlvar{'lonDefDomain'}) {
889: print $client "not_right_domain\n";
890: } else {
891: my $result=&make_passwd_file($uname, $umode,$npass,
892: $passfilename);
893: print $client $result;
894: }
895: } else {
896: print $client "refused\n";
897: }
898: # ------------------------------------------------------------------------ home
899: } elsif ($userinput =~ /^home/) {
900: my ($cmd,$udom,$uname)=split(/:/,$userinput);
901: chomp($uname);
902: my $proname=propath($udom,$uname);
903: if (-e $proname) {
904: print $client "found\n";
905: } else {
906: print $client "not_found\n";
907: }
908: # ---------------------------------------------------------------------- update
909: } elsif ($userinput =~ /^update/) {
910: my ($cmd,$fname)=split(/:/,$userinput);
911: my $ownership=ishome($fname);
912: if ($ownership eq 'not_owner') {
913: if (-e $fname) {
914: my ($dev,$ino,$mode,$nlink,
915: $uid,$gid,$rdev,$size,
916: $atime,$mtime,$ctime,
917: $blksize,$blocks)=stat($fname);
918: $now=time;
919: $since=$now-$atime;
920: if ($since>$perlvar{'lonExpire'}) {
921: $reply=
922: reply("unsub:$fname","$hostid{$clientip}");
923: unlink("$fname");
924: } else {
925: my $transname="$fname.in.transfer";
926: my $remoteurl=
927: reply("sub:$fname","$hostid{$clientip}");
928: my $response;
929: {
930: my $ua=new LWP::UserAgent;
931: my $request=new HTTP::Request('GET',"$remoteurl");
932: $response=$ua->request($request,$transname);
933: }
934: if ($response->is_error()) {
935: unlink($transname);
936: my $message=$response->status_line;
937: &logthis(
938: "LWP GET: $message for $fname ($remoteurl)");
939: } else {
940: if ($remoteurl!~/\.meta$/) {
941: my $ua=new LWP::UserAgent;
942: my $mrequest=
943: new HTTP::Request('GET',$remoteurl.'.meta');
944: my $mresponse=
945: $ua->request($mrequest,$fname.'.meta');
946: if ($mresponse->is_error()) {
947: unlink($fname.'.meta');
948: }
949: }
950: rename($transname,$fname);
951: }
952: }
953: print $client "ok\n";
954: } else {
955: print $client "not_found\n";
956: }
957: } else {
958: print $client "rejected\n";
959: }
960: # -------------------------------------- fetch a user file from a remote server
961: } elsif ($userinput =~ /^fetchuserfile/) {
962: my ($cmd,$fname)=split(/:/,$userinput);
963: my ($udom,$uname,$ufile)=split(/\//,$fname);
964: my $udir=propath($udom,$uname).'/userfiles';
965: unless (-e $udir) { mkdir($udir,0770); }
966: if (-e $udir) {
967: $ufile=~s/^[\.\~]+//;
968: $ufile=~s/\///g;
969: my $transname=$udir.'/'.$ufile;
970: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
971: my $response;
972: {
973: my $ua=new LWP::UserAgent;
974: my $request=new HTTP::Request('GET',"$remoteurl");
975: $response=$ua->request($request,$transname);
976: }
977: if ($response->is_error()) {
978: unlink($transname);
979: my $message=$response->status_line;
980: &logthis(
981: "LWP GET: $message for $fname ($remoteurl)");
982: print $client "failed\n";
983: } else {
984: print $client "ok\n";
985: }
986: } else {
987: print $client "not_home\n";
988: }
989: # ------------------------------------------ authenticate access to a user file
990: } elsif ($userinput =~ /^tokenauthuserfile/) {
991: my ($cmd,$fname,$session)=split(/:/,$userinput);
992: chomp($session);
993: $reply='non_auth';
994: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
995: $session.'.id')) {
996: while ($line=<ENVIN>) {
997: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
998: }
999: close(ENVIN);
1000: print $client $reply."\n";
1001: } else {
1002: print $client "invalid_token\n";
1003: }
1004: # ----------------------------------------------------------------- unsubscribe
1005: } elsif ($userinput =~ /^unsub/) {
1006: my ($cmd,$fname)=split(/:/,$userinput);
1007: if (-e $fname) {
1008: print $client &unsub($client,$fname,$clientip);
1009: } else {
1010: print $client "not_found\n";
1011: }
1012: # ------------------------------------------------------------------- subscribe
1013: } elsif ($userinput =~ /^sub/) {
1014: print $client &subscribe($userinput,$clientip);
1015: # ------------------------------------------------------------- current version
1016: } elsif ($userinput =~ /^currentversion/) {
1017: my ($cmd,$fname)=split(/:/,$userinput);
1018: print $client ¤tversion($fname)."\n";
1019: # ------------------------------------------------------------------------- log
1020: } elsif ($userinput =~ /^log/) {
1021: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
1022: chomp($what);
1023: my $proname=propath($udom,$uname);
1024: my $now=time;
1025: {
1026: my $hfh;
1027: if ($hfh=IO::File->new(">>$proname/activity.log")) {
1028: print $hfh "$now:$hostid{$clientip}:$what\n";
1029: print $client "ok\n";
1030: } else {
1031: print $client "error: ".($!+0)
1032: ." IO::File->new Failed "
1033: ."while attempting log\n";
1034: }
1035: }
1036: # ------------------------------------------------------------------------- put
1037: } elsif ($userinput =~ /^put/) {
1038: my ($cmd,$udom,$uname,$namespace,$what)
1039: =split(/:/,$userinput);
1040: $namespace=~s/\//\_/g;
1041: $namespace=~s/\W//g;
1042: if ($namespace ne 'roles') {
1043: chomp($what);
1044: my $proname=propath($udom,$uname);
1045: my $now=time;
1046: unless ($namespace=~/^nohist\_/) {
1047: my $hfh;
1048: if (
1049: $hfh=IO::File->new(">>$proname/$namespace.hist")
1050: ) { print $hfh "P:$now:$what\n"; }
1051: }
1052: my @pairs=split(/\&/,$what);
1053: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1054: foreach $pair (@pairs) {
1055: ($key,$value)=split(/=/,$pair);
1056: $hash{$key}=$value;
1057: }
1058: if (untie(%hash)) {
1059: print $client "ok\n";
1060: } else {
1061: print $client "error: ".($!+0)
1062: ." untie(GDBM) failed ".
1063: "while attempting put\n";
1064: }
1065: } else {
1066: print $client "error: ".($!)
1067: ." tie(GDBM) Failed ".
1068: "while attempting put\n";
1069: }
1070: } else {
1071: print $client "refused\n";
1072: }
1073: # -------------------------------------------------------------------- rolesput
1074: } elsif ($userinput =~ /^rolesput/) {
1075: &Debug("rolesput");
1076: if ($wasenc==1) {
1077: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1078: =split(/:/,$userinput);
1079: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1080: "user = ".$exeuser." udom=".$udom.
1081: "what = ".$what);
1082: my $namespace='roles';
1083: chomp($what);
1084: my $proname=propath($udom,$uname);
1085: my $now=time;
1086: {
1087: my $hfh;
1088: if (
1089: $hfh=IO::File->new(">>$proname/$namespace.hist")
1090: ) {
1091: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1092: }
1093: }
1094: my @pairs=split(/\&/,$what);
1095: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1096: foreach $pair (@pairs) {
1097: ($key,$value)=split(/=/,$pair);
1098: &ManagePermissions($key, $udom, $uname,
1099: &GetAuthType( $udom,
1100: $uname));
1101: $hash{$key}=$value;
1102:
1103: }
1104: if (untie(%hash)) {
1105: print $client "ok\n";
1106: } else {
1107: print $client "error: ".($!+0)
1108: ." untie(GDBM) Failed ".
1109: "while attempting rolesput\n";
1110: }
1111: } else {
1112: print $client "error: ".($!+0)
1113: ." tie(GDBM) Failed ".
1114: "while attempting rolesput\n";
1115: }
1116: } else {
1117: print $client "refused\n";
1118: }
1119: # ------------------------------------------------------------------------- get
1120: } elsif ($userinput =~ /^get/) {
1121: my ($cmd,$udom,$uname,$namespace,$what)
1122: =split(/:/,$userinput);
1123: $namespace=~s/\//\_/g;
1124: $namespace=~s/\W//g;
1125: chomp($what);
1126: my @queries=split(/\&/,$what);
1127: my $proname=propath($udom,$uname);
1128: my $qresult='';
1129: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1130: for ($i=0;$i<=$#queries;$i++) {
1131: $qresult.="$hash{$queries[$i]}&";
1132: }
1133: if (untie(%hash)) {
1134: $qresult=~s/\&$//;
1135: print $client "$qresult\n";
1136: } else {
1137: print $client "error: ".($!+0)
1138: ." untie(GDBM) Failed ".
1139: "while attempting get\n";
1140: }
1141: } else {
1142: if ($!+0 == 2) {
1143: print $client "error:No such file or ".
1144: "GDBM reported bad block error\n";
1145: } else {
1146: print $client "error: ".($!+0)
1147: ." tie(GDBM) Failed ".
1148: "while attempting get\n";
1149: }
1150: }
1151: # ------------------------------------------------------------------------ eget
1152: } elsif ($userinput =~ /^eget/) {
1153: my ($cmd,$udom,$uname,$namespace,$what)
1154: =split(/:/,$userinput);
1155: $namespace=~s/\//\_/g;
1156: $namespace=~s/\W//g;
1157: chomp($what);
1158: my @queries=split(/\&/,$what);
1159: my $proname=propath($udom,$uname);
1160: my $qresult='';
1161: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1162: for ($i=0;$i<=$#queries;$i++) {
1163: $qresult.="$hash{$queries[$i]}&";
1164: }
1165: if (untie(%hash)) {
1166: $qresult=~s/\&$//;
1167: if ($cipher) {
1168: my $cmdlength=length($qresult);
1169: $qresult.=" ";
1170: my $encqresult='';
1171: for
1172: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1173: $encqresult.=
1174: unpack("H16",
1175: $cipher->encrypt(substr($qresult,$encidx,8)));
1176: }
1177: print $client "enc:$cmdlength:$encqresult\n";
1178: } else {
1179: print $client "error:no_key\n";
1180: }
1181: } else {
1182: print $client "error: ".($!+0)
1183: ." untie(GDBM) Failed ".
1184: "while attempting eget\n";
1185: }
1186: } else {
1187: print $client "error: ".($!+0)
1188: ." tie(GDBM) Failed ".
1189: "while attempting eget\n";
1190: }
1191: # ------------------------------------------------------------------------- del
1192: } elsif ($userinput =~ /^del/) {
1193: my ($cmd,$udom,$uname,$namespace,$what)
1194: =split(/:/,$userinput);
1195: $namespace=~s/\//\_/g;
1196: $namespace=~s/\W//g;
1197: chomp($what);
1198: my $proname=propath($udom,$uname);
1199: my $now=time;
1200: unless ($namespace=~/^nohist\_/) {
1201: my $hfh;
1202: if (
1203: $hfh=IO::File->new(">>$proname/$namespace.hist")
1204: ) { print $hfh "D:$now:$what\n"; }
1205: }
1206: my @keys=split(/\&/,$what);
1207: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1208: foreach $key (@keys) {
1209: delete($hash{$key});
1210: }
1211: if (untie(%hash)) {
1212: print $client "ok\n";
1213: } else {
1214: print $client "error: ".($!+0)
1215: ." untie(GDBM) Failed ".
1216: "while attempting del\n";
1217: }
1218: } else {
1219: print $client "error: ".($!+0)
1220: ." tie(GDBM) Failed ".
1221: "while attempting del\n";
1222: }
1223: # ------------------------------------------------------------------------ keys
1224: } elsif ($userinput =~ /^keys/) {
1225: my ($cmd,$udom,$uname,$namespace)
1226: =split(/:/,$userinput);
1227: $namespace=~s/\//\_/g;
1228: $namespace=~s/\W//g;
1229: my $proname=propath($udom,$uname);
1230: my $qresult='';
1231: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1232: foreach $key (keys %hash) {
1233: $qresult.="$key&";
1234: }
1235: if (untie(%hash)) {
1236: $qresult=~s/\&$//;
1237: print $client "$qresult\n";
1238: } else {
1239: print $client "error: ".($!+0)
1240: ." untie(GDBM) Failed ".
1241: "while attempting keys\n";
1242: }
1243: } else {
1244: print $client "error: ".($!+0)
1245: ." tie(GDBM) Failed ".
1246: "while attempting keys\n";
1247: }
1248: # ----------------------------------------------------------------- dumpcurrent
1249: } elsif ($userinput =~ /^currentdump/) {
1250: my ($cmd,$udom,$uname,$namespace)
1251: =split(/:/,$userinput);
1252: $namespace=~s/\//\_/g;
1253: $namespace=~s/\W//g;
1254: my $qresult='';
1255: my $proname=propath($udom,$uname);
1256: if (tie(%hash,'GDBM_File',
1257: "$proname/$namespace.db",
1258: &GDBM_READER(),0640)) {
1259: # Structure of %data:
1260: # $data{$symb}->{$parameter}=$value;
1261: # $data{$symb}->{'v.'.$parameter}=$version;
1262: # since $parameter will be unescaped, we do not
1263: # have to worry about silly parameter names...
1264: my %data = ();
1265: while (my ($key,$value) = each(%hash)) {
1266: my ($v,$symb,$param) = split(/:/,$key);
1267: next if ($v eq 'version' || $symb eq 'keys');
1268: next if (exists($data{$symb}) &&
1269: exists($data{$symb}->{$param}) &&
1270: $data{$symb}->{'v.'.$param} > $v);
1271: $data{$symb}->{$param}=$value;
1272: $data{$symb}->{'v.'.$param}=$v;
1273: }
1274: if (untie(%hash)) {
1275: while (my ($symb,$param_hash) = each(%data)) {
1276: while(my ($param,$value) = each (%$param_hash)){
1277: next if ($param =~ /^v\./);
1278: $qresult.=$symb.':'.$param.'='.$value.'&';
1279: }
1280: }
1281: chop($qresult);
1282: print $client "$qresult\n";
1283: } else {
1284: print $client "error: ".($!+0)
1285: ." untie(GDBM) Failed ".
1286: "while attempting currentdump\n";
1287: }
1288: } else {
1289: print $client "error: ".($!+0)
1290: ." tie(GDBM) Failed ".
1291: "while attempting currentdump\n";
1292: }
1293: # ------------------------------------------------------------------------ dump
1294: } elsif ($userinput =~ /^dump/) {
1295: my ($cmd,$udom,$uname,$namespace,$regexp)
1296: =split(/:/,$userinput);
1297: $namespace=~s/\//\_/g;
1298: $namespace=~s/\W//g;
1299: if (defined($regexp)) {
1300: $regexp=&unescape($regexp);
1301: } else {
1302: $regexp='.';
1303: }
1304: my $qresult='';
1305: my $proname=propath($udom,$uname);
1306: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
1307: study($regexp);
1308: while (($key,$value) = each(%hash)) {
1309: if ($regexp eq '.') {
1310: $qresult.=$key.'='.$value.'&';
1311: } else {
1312: my $unescapeKey = &unescape($key);
1313: if (eval('$unescapeKey=~/$regexp/')) {
1314: $qresult.="$key=$value&";
1315: }
1316: }
1317: }
1318: if (untie(%hash)) {
1319: chop($qresult);
1320: print $client "$qresult\n";
1321: } else {
1322: print $client "error: ".($!+0)
1323: ." untie(GDBM) Failed ".
1324: "while attempting dump\n";
1325: }
1326: } else {
1327: print $client "error: ".($!+0)
1328: ." tie(GDBM) Failed ".
1329: "while attempting dump\n";
1330: }
1331: # ----------------------------------------------------------------------- store
1332: } elsif ($userinput =~ /^store/) {
1333: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1334: =split(/:/,$userinput);
1335: $namespace=~s/\//\_/g;
1336: $namespace=~s/\W//g;
1337: if ($namespace ne 'roles') {
1338: chomp($what);
1339: my $proname=propath($udom,$uname);
1340: my $now=time;
1341: unless ($namespace=~/^nohist\_/) {
1342: my $hfh;
1343: if (
1344: $hfh=IO::File->new(">>$proname/$namespace.hist")
1345: ) { print $hfh "P:$now:$rid:$what\n"; }
1346: }
1347: my @pairs=split(/\&/,$what);
1348:
1349: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1350: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1351: my $key;
1352: $hash{"version:$rid"}++;
1353: my $version=$hash{"version:$rid"};
1354: my $allkeys='';
1355: foreach $pair (@pairs) {
1356: ($key,$value)=split(/=/,$pair);
1357: $allkeys.=$key.':';
1358: $hash{"$version:$rid:$key"}=$value;
1359: }
1360: $hash{"$version:$rid:timestamp"}=$now;
1361: $allkeys.='timestamp';
1362: $hash{"$version:keys:$rid"}=$allkeys;
1363: if (untie(%hash)) {
1364: print $client "ok\n";
1365: } else {
1366: print $client "error: ".($!+0)
1367: ." untie(GDBM) Failed ".
1368: "while attempting store\n";
1369: }
1370: } else {
1371: print $client "error: ".($!+0)
1372: ." tie(GDBM) Failed ".
1373: "while attempting store\n";
1374: }
1375: } else {
1376: print $client "refused\n";
1377: }
1378: # --------------------------------------------------------------------- restore
1379: } elsif ($userinput =~ /^restore/) {
1380: my ($cmd,$udom,$uname,$namespace,$rid)
1381: =split(/:/,$userinput);
1382: $namespace=~s/\//\_/g;
1383: $namespace=~s/\W//g;
1384: chomp($rid);
1385: my $proname=propath($udom,$uname);
1386: my $qresult='';
1387: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1388: my $version=$hash{"version:$rid"};
1389: $qresult.="version=$version&";
1390: my $scope;
1391: for ($scope=1;$scope<=$version;$scope++) {
1392: my $vkeys=$hash{"$scope:keys:$rid"};
1393: my @keys=split(/:/,$vkeys);
1394: my $key;
1395: $qresult.="$scope:keys=$vkeys&";
1396: foreach $key (@keys) {
1397: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1398: }
1399: }
1400: if (untie(%hash)) {
1401: $qresult=~s/\&$//;
1402: print $client "$qresult\n";
1403: } else {
1404: print $client "error: ".($!+0)
1405: ." untie(GDBM) Failed ".
1406: "while attempting restore\n";
1407: }
1408: } else {
1409: print $client "error: ".($!+0)
1410: ." tie(GDBM) Failed ".
1411: "while attempting restore\n";
1412: }
1413: # -------------------------------------------------------------------- chatsend
1414: } elsif ($userinput =~ /^chatsend/) {
1415: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1416: &chatadd($cdom,$cnum,$newpost);
1417: print $client "ok\n";
1418: # -------------------------------------------------------------------- chatretr
1419: } elsif ($userinput =~ /^chatretr/) {
1420: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1421: my $reply='';
1422: foreach (&getchat($cdom,$cnum)) {
1423: $reply.=&escape($_).':';
1424: }
1425: $reply=~s/\:$//;
1426: print $client $reply."\n";
1427: # ------------------------------------------------------------------- querysend
1428: } elsif ($userinput =~ /^querysend/) {
1429: my ($cmd,$query,
1430: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1431: $query=~s/\n*$//g;
1432: print $client "".
1433: sqlreply("$hostid{$clientip}\&$query".
1434: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1435: # ------------------------------------------------------------------ queryreply
1436: } elsif ($userinput =~ /^queryreply/) {
1437: my ($cmd,$id,$reply)=split(/:/,$userinput);
1438: my $store;
1439: my $execdir=$perlvar{'lonDaemons'};
1440: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1441: $reply=~s/\&/\n/g;
1442: print $store $reply;
1443: close $store;
1444: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1445: print $store2 "done\n";
1446: close $store2;
1447: print $client "ok\n";
1448: }
1449: else {
1450: print $client "error: ".($!+0)
1451: ." IO::File->new Failed ".
1452: "while attempting queryreply\n";
1453: }
1454: # ----------------------------------------------------------------------- idput
1455: } elsif ($userinput =~ /^idput/) {
1456: my ($cmd,$udom,$what)=split(/:/,$userinput);
1457: chomp($what);
1458: $udom=~s/\W//g;
1459: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1460: my $now=time;
1461: {
1462: my $hfh;
1463: if (
1464: $hfh=IO::File->new(">>$proname.hist")
1465: ) { print $hfh "P:$now:$what\n"; }
1466: }
1467: my @pairs=split(/\&/,$what);
1468: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1469: foreach $pair (@pairs) {
1470: ($key,$value)=split(/=/,$pair);
1471: $hash{$key}=$value;
1472: }
1473: if (untie(%hash)) {
1474: print $client "ok\n";
1475: } else {
1476: print $client "error: ".($!+0)
1477: ." untie(GDBM) Failed ".
1478: "while attempting idput\n";
1479: }
1480: } else {
1481: print $client "error: ".($!+0)
1482: ." tie(GDBM) Failed ".
1483: "while attempting idput\n";
1484: }
1485: # ----------------------------------------------------------------------- idget
1486: } elsif ($userinput =~ /^idget/) {
1487: my ($cmd,$udom,$what)=split(/:/,$userinput);
1488: chomp($what);
1489: $udom=~s/\W//g;
1490: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1491: my @queries=split(/\&/,$what);
1492: my $qresult='';
1493: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1494: for ($i=0;$i<=$#queries;$i++) {
1495: $qresult.="$hash{$queries[$i]}&";
1496: }
1497: if (untie(%hash)) {
1498: $qresult=~s/\&$//;
1499: print $client "$qresult\n";
1500: } else {
1501: print $client "error: ".($!+0)
1502: ." untie(GDBM) Failed ".
1503: "while attempting idget\n";
1504: }
1505: } else {
1506: print $client "error: ".($!+0)
1507: ." tie(GDBM) Failed ".
1508: "while attempting idget\n";
1509: }
1510: # ---------------------------------------------------------------------- tmpput
1511: } elsif ($userinput =~ /^tmpput/) {
1512: my ($cmd,$what)=split(/:/,$userinput);
1513: my $store;
1514: $tmpsnum++;
1515: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1516: $id=~s/\W/\_/g;
1517: $what=~s/\n//g;
1518: my $execdir=$perlvar{'lonDaemons'};
1519: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1520: print $store $what;
1521: close $store;
1522: print $client "$id\n";
1523: }
1524: else {
1525: print $client "error: ".($!+0)
1526: ."IO::File->new Failed ".
1527: "while attempting tmpput\n";
1528: }
1529:
1530: # ---------------------------------------------------------------------- tmpget
1531: } elsif ($userinput =~ /^tmpget/) {
1532: my ($cmd,$id)=split(/:/,$userinput);
1533: chomp($id);
1534: $id=~s/\W/\_/g;
1535: my $store;
1536: my $execdir=$perlvar{'lonDaemons'};
1537: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1538: my $reply=<$store>;
1539: print $client "$reply\n";
1540: close $store;
1541: }
1542: else {
1543: print $client "error: ".($!+0)
1544: ."IO::File->new Failed ".
1545: "while attempting tmpget\n";
1546: }
1547:
1548: # ---------------------------------------------------------------------- tmpdel
1549: } elsif ($userinput =~ /^tmpdel/) {
1550: my ($cmd,$id)=split(/:/,$userinput);
1551: chomp($id);
1552: $id=~s/\W/\_/g;
1553: my $execdir=$perlvar{'lonDaemons'};
1554: if (unlink("$execdir/tmp/$id.tmp")) {
1555: print $client "ok\n";
1556: } else {
1557: print $client "error: ".($!+0)
1558: ."Unlink tmp Failed ".
1559: "while attempting tmpdel\n";
1560: }
1561: # -------------------------------------------------------------------------- ls
1562: } elsif ($userinput =~ /^ls/) {
1563: my ($cmd,$ulsdir)=split(/:/,$userinput);
1564: my $ulsout='';
1565: my $ulsfn;
1566: if (-e $ulsdir) {
1567: if(-d $ulsdir) {
1568: if (opendir(LSDIR,$ulsdir)) {
1569: while ($ulsfn=readdir(LSDIR)) {
1570: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1571: $ulsout.=$ulsfn.'&'.
1572: join('&',@ulsstats).':';
1573: }
1574: closedir(LSDIR);
1575: }
1576: } else {
1577: my @ulsstats=stat($ulsdir);
1578: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1579: }
1580: } else {
1581: $ulsout='no_such_dir';
1582: }
1583: if ($ulsout eq '') { $ulsout='empty'; }
1584: print $client "$ulsout\n";
1585: # ------------------------------------------------------------------ Hanging up
1586: } elsif (($userinput =~ /^exit/) ||
1587: ($userinput =~ /^init/)) {
1588: &logthis(
1589: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1590: print $client "bye\n";
1591: $client->close();
1592: last;
1593: # ------------------------------------------------------------- unknown command
1594: } else {
1595: # unknown command
1596: print $client "unknown_cmd\n";
1597: }
1598: # -------------------------------------------------------------------- complete
1599: alarm(0);
1600: &status('Listening to '.$hostid{$clientip});
1601: }
1602: # --------------------------------------------- client unknown or fishy, refuse
1603: } else {
1604: print $client "refused\n";
1605: $client->close();
1606: &logthis("<font color=blue>WARNING: "
1607: ."Rejected client $clientip, closing connection</font>");
1608: }
1609: }
1610:
1611: # =============================================================================
1612:
1613: &logthis("<font color=red>CRITICAL: "
1614: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1615:
1616:
1617: # this exit is VERY important, otherwise the child will become
1618: # a producer of more and more children, forking yourself into
1619: # process death.
1620: exit;
1621:
1622: }
1623:
1624:
1625: #
1626: # Checks to see if the input roleput request was to set
1627: # an author role. If so, invokes the lchtmldir script to set
1628: # up a correct public_html
1629: # Parameters:
1630: # request - The request sent to the rolesput subchunk.
1631: # We're looking for /domain/_au
1632: # domain - The domain in which the user is having roles doctored.
1633: # user - Name of the user for which the role is being put.
1634: # authtype - The authentication type associated with the user.
1635: #
1636: sub ManagePermissions
1637: {
1638: my $request = shift;
1639: my $domain = shift;
1640: my $user = shift;
1641: my $authtype= shift;
1642:
1643: # See if the request is of the form /$domain/_au
1644:
1645: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1646: my $execdir = $perlvar{'lonDaemons'};
1647: my $userhome= "/home/$user" ;
1648: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1649: system("$execdir/lchtmldir $userhome $user $authtype");
1650: }
1651: }
1652: #
1653: # GetAuthType - Determines the authorization type of a user in a domain.
1654:
1655: # Returns the authorization type or nouser if there is no such user.
1656: #
1657: sub GetAuthType
1658: {
1659: my $domain = shift;
1660: my $user = shift;
1661:
1662: Debug("GetAuthType( $domain, $user ) \n");
1663: my $proname = &propath($domain, $user);
1664: my $passwdfile = "$proname/passwd";
1665: if( -e $passwdfile ) {
1666: my $pf = IO::File->new($passwdfile);
1667: my $realpassword = <$pf>;
1668: chomp($realpassword);
1669: Debug("Password info = $realpassword\n");
1670: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1671: Debug("Authtype = $authtype, content = $contentpwd\n");
1672: my $availinfo = '';
1673: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1674: $availinfo = $contentpwd;
1675: }
1676:
1677: return "$authtype:$availinfo";
1678: }
1679: else {
1680: Debug("Returning nouser");
1681: return "nouser";
1682: }
1683: }
1684:
1685: sub addline {
1686: my ($fname,$hostid,$ip,$newline)=@_;
1687: my $contents;
1688: my $found=0;
1689: my $expr='^'.$hostid.':'.$ip.':';
1690: $expr =~ s/\./\\\./g;
1691: if ($sh=IO::File->new("$fname.subscription")) {
1692: while (my $subline=<$sh>) {
1693: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1694: }
1695: $sh->close();
1696: }
1697: $sh=IO::File->new(">$fname.subscription");
1698: if ($contents) { print $sh $contents; }
1699: if ($newline) { print $sh $newline; }
1700: $sh->close();
1701: return $found;
1702: }
1703:
1704: sub getchat {
1705: my ($cdom,$cname)=@_;
1706: my %hash;
1707: my $proname=&propath($cdom,$cname);
1708: my @entries=();
1709: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1710: &GDBM_READER(),0640)) {
1711: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1712: untie %hash;
1713: }
1714: return @entries;
1715: }
1716:
1717: sub chatadd {
1718: my ($cdom,$cname,$newchat)=@_;
1719: my %hash;
1720: my $proname=&propath($cdom,$cname);
1721: my @entries=();
1722: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1723: &GDBM_WRCREAT(),0640)) {
1724: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1725: my $time=time;
1726: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1727: my ($thentime,$idnum)=split(/\_/,$lastid);
1728: my $newid=$time.'_000000';
1729: if ($thentime==$time) {
1730: $idnum=~s/^0+//;
1731: $idnum++;
1732: $idnum=substr('000000'.$idnum,-6,6);
1733: $newid=$time.'_'.$idnum;
1734: }
1735: $hash{$newid}=$newchat;
1736: my $expired=$time-3600;
1737: foreach (keys %hash) {
1738: my ($thistime)=($_=~/(\d+)\_/);
1739: if ($thistime<$expired) {
1740: delete $hash{$_};
1741: }
1742: }
1743: untie %hash;
1744: }
1745: }
1746:
1747: sub unsub {
1748: my ($fname,$clientip)=@_;
1749: my $result;
1750: if (unlink("$fname.$hostid{$clientip}")) {
1751: $result="ok\n";
1752: } else {
1753: $result="not_subscribed\n";
1754: }
1755: if (-e "$fname.subscription") {
1756: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1757: if ($found) { $result="ok\n"; }
1758: } else {
1759: if ($result != "ok\n") { $result="not_subscribed\n"; }
1760: }
1761: return $result;
1762: }
1763:
1764: sub currentversion {
1765: my $fname=shift;
1766: my $version=-1;
1767: my $ulsdir='';
1768: if ($fname=~/^(.+)\/[^\/]+$/) {
1769: $ulsdir=$1;
1770: }
1771: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1772: $fname=~s/\.(\w+(?:\.meta)*)$/\.\(\\d\+\)\.$1\$/;
1773:
1774: if (-e $fname) { $version=1; }
1775: if (-e $ulsdir) {
1776: if(-d $ulsdir) {
1777: if (opendir(LSDIR,$ulsdir)) {
1778: while ($ulsfn=readdir(LSDIR)) {
1779: # see if this is a regular file (ignore links produced earlier)
1780: my $thisfile=$ulsdir.'/'.$ulsfn;
1781: unless (-l $thisfile) {
1782: if ($thisfile=~/$fname/) {
1783: if ($1>$version) { $version=$1; }
1784: }
1785: }
1786: }
1787: closedir(LSDIR);
1788: $version++;
1789: }
1790: }
1791: }
1792: return $version;
1793: }
1794:
1795: sub thisversion {
1796: my $fname=shift;
1797: my $version=-1;
1798: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
1799: $version=$1;
1800: }
1801: return $version;
1802: }
1803:
1804: sub subscribe {
1805: my ($userinput,$clientip)=@_;
1806: my $result;
1807: my ($cmd,$fname)=split(/:/,$userinput);
1808: my $ownership=&ishome($fname);
1809: if ($ownership eq 'owner') {
1810: # explitly asking for the current version?
1811: unless (-e $fname) {
1812: my $currentversion=¤tversion($fname);
1813: if (&thisversion($fname)==$currentversion) {
1814: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
1815: my $root=$1;
1816: my $extension=$2;
1817: symlink($root.'.'.$extension,
1818: $root.'.'.$currentversion.'.'.$extension);
1819: unless ($extension=~/\.meta$/) {
1820: symlink($root.'.'.$extension.'.meta',
1821: $root.'.'.$currentversion.'.'.$extension.'.meta');
1822: }
1823: }
1824: }
1825: }
1826: if (-e $fname) {
1827: if (-d $fname) {
1828: $result="directory\n";
1829: } else {
1830: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1831: $now=time;
1832: my $found=&addline($fname,$hostid{$clientip},$clientip,
1833: "$hostid{$clientip}:$clientip:$now\n");
1834: if ($found) { $result="$fname\n"; }
1835: # if they were subscribed to only meta data, delete that
1836: # subscription, when you subscribe to a file you also get
1837: # the metadata
1838: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1839: $fname=~s/\/home\/httpd\/html\/res/raw/;
1840: $fname="http://$thisserver/".$fname;
1841: $result="$fname\n";
1842: }
1843: } else {
1844: $result="not_found\n";
1845: }
1846: } else {
1847: $result="rejected\n";
1848: }
1849: return $result;
1850: }
1851:
1852: sub make_passwd_file {
1853: my ($uname, $umode,$npass,$passfilename)=@_;
1854: my $result="ok\n";
1855: if ($umode eq 'krb4' or $umode eq 'krb5') {
1856: {
1857: my $pf = IO::File->new(">$passfilename");
1858: print $pf "$umode:$npass\n";
1859: }
1860: } elsif ($umode eq 'internal') {
1861: my $salt=time;
1862: $salt=substr($salt,6,2);
1863: my $ncpass=crypt($npass,$salt);
1864: {
1865: &Debug("Creating internal auth");
1866: my $pf = IO::File->new(">$passfilename");
1867: print $pf "internal:$ncpass\n";
1868: }
1869: } elsif ($umode eq 'localauth') {
1870: {
1871: my $pf = IO::File->new(">$passfilename");
1872: print $pf "localauth:$npass\n";
1873: }
1874: } elsif ($umode eq 'unix') {
1875: {
1876: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1877: {
1878: &Debug("Executing external: ".$execpath);
1879: &Debug("user = ".$uname.", Password =". $npass);
1880: my $se = IO::File->new("|$execpath > /home/www/lcuseradd.log");
1881: print $se "$uname\n";
1882: print $se "$npass\n";
1883: print $se "$npass\n";
1884: }
1885: my $useraddok = $?;
1886: if($useraddok > 0) {
1887: &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1888: }
1889: my $pf = IO::File->new(">$passfilename");
1890: print $pf "unix:\n";
1891: }
1892: } elsif ($umode eq 'none') {
1893: {
1894: my $pf = IO::File->new(">$passfilename");
1895: print $pf "none:\n";
1896: }
1897: } else {
1898: $result="auth_mode_error\n";
1899: }
1900: return $result;
1901: }
1902:
1903: # ----------------------------------- POD (plain old documentation, CPAN style)
1904:
1905: =head1 NAME
1906:
1907: lond - "LON Daemon" Server (port "LOND" 5663)
1908:
1909: =head1 SYNOPSIS
1910:
1911: Usage: B<lond>
1912:
1913: Should only be run as user=www. This is a command-line script which
1914: is invoked by B<loncron>. There is no expectation that a typical user
1915: will manually start B<lond> from the command-line. (In other words,
1916: DO NOT START B<lond> YOURSELF.)
1917:
1918: =head1 DESCRIPTION
1919:
1920: There are two characteristics associated with the running of B<lond>,
1921: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1922: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1923: subscriptions, etc). These are described in two large
1924: sections below.
1925:
1926: B<PROCESS MANAGEMENT>
1927:
1928: Preforker - server who forks first. Runs as a daemon. HUPs.
1929: Uses IDEA encryption
1930:
1931: B<lond> forks off children processes that correspond to the other servers
1932: in the network. Management of these processes can be done at the
1933: parent process level or the child process level.
1934:
1935: B<logs/lond.log> is the location of log messages.
1936:
1937: The process management is now explained in terms of linux shell commands,
1938: subroutines internal to this code, and signal assignments:
1939:
1940: =over 4
1941:
1942: =item *
1943:
1944: PID is stored in B<logs/lond.pid>
1945:
1946: This is the process id number of the parent B<lond> process.
1947:
1948: =item *
1949:
1950: SIGTERM and SIGINT
1951:
1952: Parent signal assignment:
1953: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1954:
1955: Child signal assignment:
1956: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1957: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1958: to restart a new child.)
1959:
1960: Command-line invocations:
1961: B<kill> B<-s> SIGTERM I<PID>
1962: B<kill> B<-s> SIGINT I<PID>
1963:
1964: Subroutine B<HUNTSMAN>:
1965: This is only invoked for the B<lond> parent I<PID>.
1966: This kills all the children, and then the parent.
1967: The B<lonc.pid> file is cleared.
1968:
1969: =item *
1970:
1971: SIGHUP
1972:
1973: Current bug:
1974: This signal can only be processed the first time
1975: on the parent process. Subsequent SIGHUP signals
1976: have no effect.
1977:
1978: Parent signal assignment:
1979: $SIG{HUP} = \&HUPSMAN;
1980:
1981: Child signal assignment:
1982: none (nothing happens)
1983:
1984: Command-line invocations:
1985: B<kill> B<-s> SIGHUP I<PID>
1986:
1987: Subroutine B<HUPSMAN>:
1988: This is only invoked for the B<lond> parent I<PID>,
1989: This kills all the children, and then the parent.
1990: The B<lond.pid> file is cleared.
1991:
1992: =item *
1993:
1994: SIGUSR1
1995:
1996: Parent signal assignment:
1997: $SIG{USR1} = \&USRMAN;
1998:
1999: Child signal assignment:
2000: $SIG{USR1}= \&logstatus;
2001:
2002: Command-line invocations:
2003: B<kill> B<-s> SIGUSR1 I<PID>
2004:
2005: Subroutine B<USRMAN>:
2006: When invoked for the B<lond> parent I<PID>,
2007: SIGUSR1 is sent to all the children, and the status of
2008: each connection is logged.
2009:
2010: =item *
2011:
2012: SIGCHLD
2013:
2014: Parent signal assignment:
2015: $SIG{CHLD} = \&REAPER;
2016:
2017: Child signal assignment:
2018: none
2019:
2020: Command-line invocations:
2021: B<kill> B<-s> SIGCHLD I<PID>
2022:
2023: Subroutine B<REAPER>:
2024: This is only invoked for the B<lond> parent I<PID>.
2025: Information pertaining to the child is removed.
2026: The socket port is cleaned up.
2027:
2028: =back
2029:
2030: B<SERVER-SIDE ACTIVITIES>
2031:
2032: Server-side information can be accepted in an encrypted or non-encrypted
2033: method.
2034:
2035: =over 4
2036:
2037: =item ping
2038:
2039: Query a client in the hosts.tab table; "Are you there?"
2040:
2041: =item pong
2042:
2043: Respond to a ping query.
2044:
2045: =item ekey
2046:
2047: Read in encrypted key, make cipher. Respond with a buildkey.
2048:
2049: =item load
2050:
2051: Respond with CPU load based on a computation upon /proc/loadavg.
2052:
2053: =item currentauth
2054:
2055: Reply with current authentication information (only over an
2056: encrypted channel).
2057:
2058: =item auth
2059:
2060: Only over an encrypted channel, reply as to whether a user's
2061: authentication information can be validated.
2062:
2063: =item passwd
2064:
2065: Allow for a password to be set.
2066:
2067: =item makeuser
2068:
2069: Make a user.
2070:
2071: =item passwd
2072:
2073: Allow for authentication mechanism and password to be changed.
2074:
2075: =item home
2076:
2077: Respond to a question "are you the home for a given user?"
2078:
2079: =item update
2080:
2081: Update contents of a subscribed resource.
2082:
2083: =item unsubscribe
2084:
2085: The server is unsubscribing from a resource.
2086:
2087: =item subscribe
2088:
2089: The server is subscribing to a resource.
2090:
2091: =item log
2092:
2093: Place in B<logs/lond.log>
2094:
2095: =item put
2096:
2097: stores hash in namespace
2098:
2099: =item rolesput
2100:
2101: put a role into a user's environment
2102:
2103: =item get
2104:
2105: returns hash with keys from array
2106: reference filled in from namespace
2107:
2108: =item eget
2109:
2110: returns hash with keys from array
2111: reference filled in from namesp (encrypts the return communication)
2112:
2113: =item rolesget
2114:
2115: get a role from a user's environment
2116:
2117: =item del
2118:
2119: deletes keys out of array from namespace
2120:
2121: =item keys
2122:
2123: returns namespace keys
2124:
2125: =item dump
2126:
2127: dumps the complete (or key matching regexp) namespace into a hash
2128:
2129: =item store
2130:
2131: stores hash permanently
2132: for this url; hashref needs to be given and should be a \%hashname; the
2133: remaining args aren't required and if they aren't passed or are '' they will
2134: be derived from the ENV
2135:
2136: =item restore
2137:
2138: returns a hash for a given url
2139:
2140: =item querysend
2141:
2142: Tells client about the lonsql process that has been launched in response
2143: to a sent query.
2144:
2145: =item queryreply
2146:
2147: Accept information from lonsql and make appropriate storage in temporary
2148: file space.
2149:
2150: =item idput
2151:
2152: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
2153: for each student, defined perhaps by the institutional Registrar.)
2154:
2155: =item idget
2156:
2157: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
2158: for each student, defined perhaps by the institutional Registrar.)
2159:
2160: =item tmpput
2161:
2162: Accept and store information in temporary space.
2163:
2164: =item tmpget
2165:
2166: Send along temporarily stored information.
2167:
2168: =item ls
2169:
2170: List part of a user's directory.
2171:
2172: =item Hanging up (exit or init)
2173:
2174: What to do when a client tells the server that they (the client)
2175: are leaving the network.
2176:
2177: =item unknown command
2178:
2179: If B<lond> is sent an unknown command (not in the list above),
2180: it replys to the client "unknown_cmd".
2181:
2182: =item UNKNOWN CLIENT
2183:
2184: If the anti-spoofing algorithm cannot verify the client,
2185: the client is rejected (with a "refused" message sent
2186: to the client, and the connection is closed.
2187:
2188: =back
2189:
2190: =head1 PREREQUISITES
2191:
2192: IO::Socket
2193: IO::File
2194: Apache::File
2195: Symbol
2196: POSIX
2197: Crypt::IDEA
2198: LWP::UserAgent()
2199: GDBM_File
2200: Authen::Krb4
2201: Authen::Krb5
2202:
2203: =head1 COREQUISITES
2204:
2205: =head1 OSNAMES
2206:
2207: linux
2208:
2209: =head1 SCRIPT CATEGORIES
2210:
2211: Server/Process
2212:
2213: =cut
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