Annotation of loncom/lond, revision 1.96
1.1 albertel 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60 www 4: #
1.96 ! foxr 5: # $Id: lond,v 1.95 2002/09/09 14:04:02 harris41 Exp $
1.60 www 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: #
1.1 albertel 29: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
1.2 www 30: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
1.6 www 31: # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16,
1.11 www 32: # 12/7,12/15,01/06,01/11,01/12,01/14,2/8,
1.12 harris41 33: # 03/07,05/31 Gerd Kortemeyer
1.13 www 34: # 06/26 Scott Harrison
1.20 www 35: # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
1.25 www 36: # 12/05 Scott Harrison
1.34 www 37: # 12/05,12/13,12/29 Gerd Kortemeyer
1.61 harris41 38: # YEAR=2001
1.36 www 39: # Jan 01 Scott Harrison
40: # 02/12 Gerd Kortemeyer
1.37 harris41 41: # 03/15 Scott Harrison
1.41 www 42: # 03/24 Gerd Kortemeyer
1.47 www 43: # 04/02 Scott Harrison
1.51 www 44: # 05/11,05/28,08/30 Gerd Kortemeyer
1.56 harris41 45: # 9/30,10/22,11/13,11/15,11/16 Scott Harrison
1.59 www 46: # 11/26,11/27 Gerd Kortemeyer
1.61 harris41 47: # 12/20 Scott Harrison
1.62 www 48: # 12/22 Gerd Kortemeyer
1.63 www 49: # YEAR=2002
1.65 www 50: # 01/20/02,02/05 Gerd Kortemeyer
1.71 www 51: # 02/05 Guy Albertelli
52: # 02/07 Scott Harrison
53: # 02/12 Gerd Kortemeyer
1.73 www 54: # 02/19 Matthew Hall
55: # 02/25 Gerd Kortemeyer
1.80 harris41 56: # 05/11 Scott Harrison
1.54 harris41 57: ###
58:
1.1 albertel 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:
1.80 harris41 65: use lib '/home/httpd/lib/perl/';
66: use LONCAPA::Configuration;
67:
1.1 albertel 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();
1.3 www 75: use GDBM_File;
76: use Authen::Krb4;
1.91 albertel 77: use Authen::Krb5;
1.49 albertel 78: use lib '/home/httpd/lib/perl/';
79: use localauth;
1.1 albertel 80:
1.77 foxr 81: my $DEBUG = 0; # Non zero to enable debug log entries.
82:
1.57 www 83: my $status='';
84: my $lastlog='';
85:
1.96 ! foxr 86: #
! 87: # The array below are password error strings."
! 88: #
! 89: my $lasterror = 10; # 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:
! 102: #
! 103: # Convert an error return code from lcpasswd to a string value.
! 104: #
! 105: sub lcpasswdstrerror {
! 106: my $ErrorCode = shift;
! 107: if(($ErrorCode < 0) || ($ErrorCode > $lasterror)) {
! 108: return "lcpasswd Unrecognized error return value ".$ErrorCode;
! 109: } else {
! 110: return $passwderrors($ErrorCode);
! 111: }
! 112: }
! 113:
1.23 harris41 114: # grabs exception and records it to log before exiting
115: sub catchexception {
1.27 albertel 116: my ($error)=@_;
1.25 www 117: $SIG{'QUIT'}='DEFAULT';
118: $SIG{__DIE__}='DEFAULT';
1.23 harris41 119: &logthis("<font color=red>CRITICAL: "
120: ."ABNORMAL EXIT. Child $$ for server $wasserver died through "
1.27 albertel 121: ."a crash with this error msg->[$error]</font>");
1.57 www 122: &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27 albertel 123: if ($client) { print $client "error: $error\n"; }
1.59 www 124: $server->close();
1.27 albertel 125: die($error);
1.23 harris41 126: }
127:
1.63 www 128: sub timeout {
129: &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
130: &catchexception('Timeout');
131: }
1.22 harris41 132: # -------------------------------- Set signal handlers to record abnormal exits
133:
134: $SIG{'QUIT'}=\&catchexception;
135: $SIG{__DIE__}=\&catchexception;
136:
1.81 matthew 137: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95 harris41 138: &status("Read loncapa.conf and loncapa_apache.conf");
139: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.80 harris41 140: my %perlvar=%{$perlvarref};
141: undef $perlvarref;
1.19 www 142:
1.35 harris41 143: # ----------------------------- Make sure this process is running from user=www
144: my $wwwid=getpwnam('www');
145: if ($wwwid!=$<) {
146: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
147: $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
1.37 harris41 148: system("echo 'User ID mismatch. lond must be run as user www.' |\
1.35 harris41 149: mailto $emailto -s '$subj' > /dev/null");
150: exit 1;
151: }
152:
1.19 www 153: # --------------------------------------------- Check if other instance running
154:
155: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
156:
157: if (-e $pidfile) {
158: my $lfh=IO::File->new("$pidfile");
159: my $pide=<$lfh>;
160: chomp($pide);
1.29 harris41 161: if (kill 0 => $pide) { die "already running"; }
1.19 www 162: }
1.1 albertel 163:
164: $PREFORK=4; # number of children to maintain, at least four spare
165:
166: # ------------------------------------------------------------- Read hosts file
167:
1.29 harris41 168: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
1.1 albertel 169:
170: while ($configline=<CONFIG>) {
171: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
1.70 harris41 172: chomp($ip); $ip=~s/\D+$//;
1.1 albertel 173: $hostid{$ip}=$id;
174: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
175: $PREFORK++;
176: }
177: close(CONFIG);
178:
179: # establish SERVER socket, bind and listen.
180: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
181: Type => SOCK_STREAM,
182: Proto => 'tcp',
183: Reuse => 1,
184: Listen => 10 )
1.29 harris41 185: or die "making socket: $@\n";
1.1 albertel 186:
187: # --------------------------------------------------------- Do global variables
188:
189: # global variables
190:
1.75 foxr 191: $MAX_CLIENTS_PER_CHILD = 50; # number of clients each child should
1.1 albertel 192: # process
193: %children = (); # keys are current child process IDs
194: $children = 0; # current number of children
195:
196: sub REAPER { # takes care of dead children
197: $SIG{CHLD} = \&REAPER;
198: my $pid = wait;
1.67 albertel 199: if (defined($children{$pid})) {
200: &logthis("Child $pid died");
201: $children --;
202: delete $children{$pid};
203: } else {
204: &logthis("Unknown Child $pid died");
205: }
1.1 albertel 206: }
207:
208: sub HUNTSMAN { # signal handler for SIGINT
209: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
210: kill 'INT' => keys %children;
1.59 www 211: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1 albertel 212: my $execdir=$perlvar{'lonDaemons'};
213: unlink("$execdir/logs/lond.pid");
1.9 www 214: &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.1 albertel 215: exit; # clean up with dignity
216: }
217:
218: sub HUPSMAN { # signal handler for SIGHUP
219: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
220: kill 'INT' => keys %children;
1.59 www 221: &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9 www 222: &logthis("<font color=red>CRITICAL: Restarting</font>");
1.30 harris41 223: unlink("$execdir/logs/lond.pid");
1.1 albertel 224: my $execdir=$perlvar{'lonDaemons'};
225: exec("$execdir/lond"); # here we go again
226: }
227:
1.57 www 228: sub checkchildren {
229: &initnewstatus();
230: &logstatus();
231: &logthis('Going to check on the children');
1.63 www 232: $docdir=$perlvar{'lonDocRoot'};
1.61 harris41 233: foreach (sort keys %children) {
1.57 www 234: sleep 1;
235: unless (kill 'USR1' => $_) {
236: &logthis ('Child '.$_.' is dead');
237: &logstatus($$.' is dead');
238: }
1.61 harris41 239: }
1.63 www 240: sleep 5;
241: foreach (sort keys %children) {
242: unless (-e "$docdir/lon-status/londchld/$_.txt") {
243: &logthis('Child '.$_.' did not respond');
1.67 albertel 244: kill 9 => $_;
245: $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
246: $subj="LON: $perlvar{'lonHostID'} killed lond process $_";
1.68 albertel 247: my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
1.66 www 248: $execdir=$perlvar{'lonDaemons'};
1.67 albertel 249: $result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`
1.63 www 250: }
251: }
1.57 www 252: }
253:
1.1 albertel 254: # --------------------------------------------------------------------- Logging
255:
256: sub logthis {
257: my $message=shift;
258: my $execdir=$perlvar{'lonDaemons'};
259: my $fh=IO::File->new(">>$execdir/logs/lond.log");
260: my $now=time;
261: my $local=localtime($now);
1.58 www 262: $lastlog=$local.': '.$message;
1.1 albertel 263: print $fh "$local ($$): $message\n";
264: }
265:
1.77 foxr 266: # ------------------------- Conditional log if $DEBUG true.
267: sub Debug {
268: my $message = shift;
269: if($DEBUG) {
270: &logthis($message);
271: }
272: }
1.57 www 273: # ------------------------------------------------------------------ Log status
274:
275: sub logstatus {
276: my $docdir=$perlvar{'lonDocRoot'};
1.63 www 277: {
1.57 www 278: my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
279: print $fh $$."\t".$status."\t".$lastlog."\n";
1.63 www 280: $fh->close();
281: }
282: {
283: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
284: print $fh $status."\n".$lastlog."\n".time;
285: $fh->close();
286: }
1.57 www 287: }
288:
289: sub initnewstatus {
290: my $docdir=$perlvar{'lonDocRoot'};
291: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
292: my $now=time;
293: my $local=localtime($now);
294: print $fh "LOND status $local - parent $$\n\n";
1.64 www 295: opendir(DIR,"$docdir/lon-status/londchld");
296: while ($filename=readdir(DIR)) {
297: unlink("$docdir/lon-status/londchld/$filename");
298: }
299: closedir(DIR);
1.57 www 300: }
301:
302: # -------------------------------------------------------------- Status setting
303:
304: sub status {
305: my $what=shift;
306: my $now=time;
307: my $local=localtime($now);
308: $status=$local.': '.$what;
309: }
1.11 www 310:
311: # -------------------------------------------------------- Escape Special Chars
312:
313: sub escape {
314: my $str=shift;
315: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
316: return $str;
317: }
318:
319: # ----------------------------------------------------- Un-Escape Special Chars
320:
321: sub unescape {
322: my $str=shift;
323: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
324: return $str;
325: }
326:
1.1 albertel 327: # ----------------------------------------------------------- Send USR1 to lonc
328:
329: sub reconlonc {
330: my $peerfile=shift;
331: &logthis("Trying to reconnect for $peerfile");
332: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
333: if (my $fh=IO::File->new("$loncfile")) {
334: my $loncpid=<$fh>;
335: chomp($loncpid);
336: if (kill 0 => $loncpid) {
337: &logthis("lonc at pid $loncpid responding, sending USR1");
338: kill USR1 => $loncpid;
1.75 foxr 339: sleep 5;
1.1 albertel 340: if (-e "$peerfile") { return; }
341: &logthis("$peerfile still not there, give it another try");
1.75 foxr 342: sleep 10;
1.1 albertel 343: if (-e "$peerfile") { return; }
1.9 www 344: &logthis(
345: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
1.1 albertel 346: } else {
1.9 www 347: &logthis(
348: "<font color=red>CRITICAL: "
349: ."lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 350: }
351: } else {
1.9 www 352: &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1 albertel 353: }
354: }
355:
356: # -------------------------------------------------- Non-critical communication
1.11 www 357:
1.1 albertel 358: sub subreply {
359: my ($cmd,$server)=@_;
360: my $peerfile="$perlvar{'lonSockDir'}/$server";
361: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
362: Type => SOCK_STREAM,
363: Timeout => 10)
364: or return "con_lost";
365: print $sclient "$cmd\n";
366: my $answer=<$sclient>;
367: chomp($answer);
368: if (!$answer) { $answer="con_lost"; }
369: return $answer;
370: }
371:
372: sub reply {
373: my ($cmd,$server)=@_;
374: my $answer;
375: if ($server ne $perlvar{'lonHostID'}) {
376: $answer=subreply($cmd,$server);
377: if ($answer eq 'con_lost') {
378: $answer=subreply("ping",$server);
379: if ($answer ne $server) {
1.75 foxr 380: &logthis("sub reply: answer != server");
1.1 albertel 381: &reconlonc("$perlvar{'lonSockDir'}/$server");
382: }
383: $answer=subreply($cmd,$server);
384: }
385: } else {
386: $answer='self_reply';
387: }
388: return $answer;
389: }
390:
1.13 www 391: # -------------------------------------------------------------- Talk to lonsql
392:
1.12 harris41 393: sub sqlreply {
394: my ($cmd)=@_;
395: my $answer=subsqlreply($cmd);
396: if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
397: return $answer;
398: }
399:
400: sub subsqlreply {
401: my ($cmd)=@_;
402: my $unixsock="mysqlsock";
403: my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
404: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
405: Type => SOCK_STREAM,
406: Timeout => 10)
407: or return "con_lost";
408: print $sclient "$cmd\n";
409: my $answer=<$sclient>;
410: chomp($answer);
411: if (!$answer) { $answer="con_lost"; }
412: return $answer;
413: }
414:
1.1 albertel 415: # -------------------------------------------- Return path to profile directory
1.11 www 416:
1.1 albertel 417: sub propath {
418: my ($udom,$uname)=@_;
419: $udom=~s/\W//g;
420: $uname=~s/\W//g;
1.16 www 421: my $subdir=$uname.'__';
1.1 albertel 422: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
423: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
424: return $proname;
425: }
426:
427: # --------------------------------------- Is this the home server of an author?
1.11 www 428:
1.1 albertel 429: sub ishome {
430: my $author=shift;
431: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
432: my ($udom,$uname)=split(/\//,$author);
433: my $proname=propath($udom,$uname);
434: if (-e $proname) {
435: return 'owner';
436: } else {
437: return 'not_owner';
438: }
439: }
440:
441: # ======================================================= Continue main program
442: # ---------------------------------------------------- Fork once and dissociate
443:
444: $fpid=fork;
445: exit if $fpid;
1.29 harris41 446: die "Couldn't fork: $!" unless defined ($fpid);
1.1 albertel 447:
1.29 harris41 448: POSIX::setsid() or die "Can't start new session: $!";
1.1 albertel 449:
450: # ------------------------------------------------------- Write our PID on disk
451:
452: $execdir=$perlvar{'lonDaemons'};
453: open (PIDSAVE,">$execdir/logs/lond.pid");
454: print PIDSAVE "$$\n";
455: close(PIDSAVE);
1.9 www 456: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57 www 457: &status('Starting');
1.1 albertel 458:
459: # ------------------------------------------------------- Now we are on our own
460:
461: # Fork off our children.
462: for (1 .. $PREFORK) {
463: make_new_child();
464: }
465:
466: # ----------------------------------------------------- Install signal handlers
467:
1.57 www 468: &status('Forked children');
469:
1.1 albertel 470: $SIG{CHLD} = \&REAPER;
471: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
472: $SIG{HUP} = \&HUPSMAN;
1.57 www 473: $SIG{USR1} = \&checkchildren;
1.1 albertel 474:
475: # And maintain the population.
476: while (1) {
1.57 www 477: &status('Sleeping');
1.1 albertel 478: sleep; # wait for a signal (i.e., child's death)
1.57 www 479: &logthis('Woke up');
480: &status('Woke up');
1.1 albertel 481: for ($i = $children; $i < $PREFORK; $i++) {
482: make_new_child(); # top up the child pool
483: }
484: }
485:
486: sub make_new_child {
487: my $pid;
488: my $cipher;
489: my $sigset;
490: &logthis("Attempting to start child");
491: # block signal for fork
492: $sigset = POSIX::SigSet->new(SIGINT);
493: sigprocmask(SIG_BLOCK, $sigset)
1.29 harris41 494: or die "Can't block SIGINT for fork: $!\n";
1.1 albertel 495:
1.29 harris41 496: die "fork: $!" unless defined ($pid = fork);
1.1 albertel 497:
498: if ($pid) {
499: # Parent records the child's birth and returns.
500: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 501: or die "Can't unblock SIGINT for fork: $!\n";
1.1 albertel 502: $children{$pid} = 1;
503: $children++;
1.57 www 504: &status('Started child '.$pid);
1.1 albertel 505: return;
506: } else {
507: # Child can *not* return from this subroutine.
508: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
1.57 www 509: $SIG{USR1}= \&logstatus;
1.63 www 510: $SIG{ALRM}= \&timeout;
1.57 www 511: $lastlog='Forked ';
512: $status='Forked';
513:
1.1 albertel 514: # unblock signals
515: sigprocmask(SIG_UNBLOCK, $sigset)
1.29 harris41 516: or die "Can't unblock SIGINT for fork: $!\n";
1.13 www 517:
518: $tmpsnum=0;
1.91 albertel 519: #---------------------------------------------------- kerberos 5 initialization
520: &Authen::Krb5::init_context();
521: &Authen::Krb5::init_ets();
522:
1.1 albertel 523: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
524: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
1.57 www 525: &status('Idle, waiting for connection');
1.1 albertel 526: $client = $server->accept() or last;
1.57 www 527: &status('Accepted connection');
1.1 albertel 528: # =============================================================================
529: # do something with the connection
530: # -----------------------------------------------------------------------------
1.94 albertel 531: $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
532: # connection liveness.
1.2 www 533: # see if we know client and check for spoof IP by challenge
1.1 albertel 534: my $caller=getpeername($client);
535: my ($port,$iaddr)=unpack_sockaddr_in($caller);
536: my $clientip=inet_ntoa($iaddr);
537: my $clientrec=($hostid{$clientip} ne undef);
1.9 www 538: &logthis(
1.51 www 539: "<font color=yellow>INFO: Connection $i, $clientip ($hostid{$clientip})</font>"
540: );
1.57 www 541: &status("Connecting $clientip ($hostid{$clientip})");
1.2 www 542: my $clientok;
1.1 albertel 543: if ($clientrec) {
1.57 www 544: &status("Waiting for init from $clientip ($hostid{$clientip})");
1.2 www 545: my $remotereq=<$client>;
546: $remotereq=~s/\W//g;
547: if ($remotereq eq 'init') {
548: my $challenge="$$".time;
549: print $client "$challenge\n";
1.57 www 550: &status(
551: "Waiting for challenge reply from $clientip ($hostid{$clientip})");
1.2 www 552: $remotereq=<$client>;
553: $remotereq=~s/\W//g;
554: if ($challenge eq $remotereq) {
555: $clientok=1;
556: print $client "ok\n";
557: } else {
1.9 www 558: &logthis(
559: "<font color=blue>WARNING: $clientip did not reply challenge</font>");
1.57 www 560: &status('No challenge reply '.$clientip);
1.2 www 561: }
562: } else {
1.9 www 563: &logthis(
564: "<font color=blue>WARNING: "
565: ."$clientip failed to initialize: >$remotereq< </font>");
1.57 www 566: &status('No init '.$clientip);
1.2 www 567: }
568: } else {
1.9 www 569: &logthis(
570: "<font color=blue>WARNING: Unknown client $clientip</font>");
1.57 www 571: &status('Hung up on '.$clientip);
1.2 www 572: }
573: if ($clientok) {
1.1 albertel 574: # ---------------- New known client connecting, could mean machine online again
1.75 foxr 575:
1.76 foxr 576: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
1.9 www 577: &logthis(
578: "<font color=green>Established connection: $hostid{$clientip}</font>");
1.58 www 579: &status('Will listen to '.$hostid{$clientip});
1.1 albertel 580: # ------------------------------------------------------------ Process requests
581: while (my $userinput=<$client>) {
582: chomp($userinput);
1.79 foxr 583: Debug("Request = $userinput\n");
1.57 www 584: &status('Processing '.$hostid{$clientip}.': '.$userinput);
1.1 albertel 585: my $wasenc=0;
1.63 www 586: alarm(120);
1.1 albertel 587: # ------------------------------------------------------------ See if encrypted
588: if ($userinput =~ /^enc/) {
589: if ($cipher) {
590: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
591: $userinput='';
592: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
593: $userinput.=
594: $cipher->decrypt(
595: pack("H16",substr($encinput,$encidx,16))
596: );
597: }
598: $userinput=substr($userinput,0,$cmdlength);
599: $wasenc=1;
600: }
1.75 foxr 601: }
602:
1.1 albertel 603: # ------------------------------------------------------------- Normal commands
604: # ------------------------------------------------------------------------ ping
605: if ($userinput =~ /^ping/) {
606: print $client "$perlvar{'lonHostID'}\n";
607: # ------------------------------------------------------------------------ pong
608: } elsif ($userinput =~ /^pong/) {
609: $reply=reply("ping",$hostid{$clientip});
610: print $client "$perlvar{'lonHostID'}:$reply\n";
611: # ------------------------------------------------------------------------ ekey
612: } elsif ($userinput =~ /^ekey/) {
613: my $buildkey=time.$$.int(rand 100000);
614: $buildkey=~tr/1-6/A-F/;
615: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
616: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
617: $key=~tr/a-z/A-Z/;
618: $key=~tr/G-P/0-9/;
619: $key=~tr/Q-Z/0-9/;
620: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
621: $key=substr($key,0,32);
622: my $cipherkey=pack("H32",$key);
623: $cipher=new IDEA $cipherkey;
624: print $client "$buildkey\n";
625: # ------------------------------------------------------------------------ load
626: } elsif ($userinput =~ /^load/) {
627: my $loadavg;
628: {
629: my $loadfile=IO::File->new('/proc/loadavg');
630: $loadavg=<$loadfile>;
631: }
632: $loadavg =~ s/\s.*//g;
633: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
634: print $client "$loadpercent\n";
1.54 harris41 635: # ----------------------------------------------------------------- currentauth
636: } elsif ($userinput =~ /^currentauth/) {
637: if ($wasenc==1) {
638: my ($cmd,$udom,$uname)=split(/:/,$userinput);
1.79 foxr 639: my $result = GetAuthType($udom, $uname);
1.78 foxr 640: if($result eq "nouser") {
641: print $client "unknown_user\n";
642: }
643: else {
644: print $client "$result\n"
645: }
1.54 harris41 646: } else {
647: print $client "refused\n";
648: }
1.1 albertel 649: # ------------------------------------------------------------------------ auth
650: } elsif ($userinput =~ /^auth/) {
651: if ($wasenc==1) {
652: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
653: chomp($upass);
1.11 www 654: $upass=unescape($upass);
1.1 albertel 655: my $proname=propath($udom,$uname);
656: my $passfilename="$proname/passwd";
657: if (-e $passfilename) {
658: my $pf = IO::File->new($passfilename);
659: my $realpasswd=<$pf>;
660: chomp($realpasswd);
1.2 www 661: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
662: my $pwdcorrect=0;
663: if ($howpwd eq 'internal') {
664: $pwdcorrect=
665: (crypt($upass,$contentpwd) eq $contentpwd);
666: } elsif ($howpwd eq 'unix') {
667: $contentpwd=(getpwnam($uname))[1];
1.52 harris41 668: my $pwauth_path="/usr/local/sbin/pwauth";
669: unless ($contentpwd eq 'x') {
670: $pwdcorrect=
671: (crypt($upass,$contentpwd) eq $contentpwd);
672: }
673: elsif (-e $pwauth_path) {
674: open PWAUTH, "|$pwauth_path" or
675: die "Cannot invoke authentication";
676: print PWAUTH "$uname\n$upass\n";
677: close PWAUTH;
678: $pwdcorrect=!$?;
679: }
1.3 www 680: } elsif ($howpwd eq 'krb4') {
1.71 www 681: $null=pack("C",0);
682: unless ($upass=~/$null/) {
1.3 www 683: $pwdcorrect=(
684: Authen::Krb4::get_pw_in_tkt($uname,"",
685: $contentpwd,'krbtgt',$contentpwd,1,
686: $upass) == 0);
1.71 www 687: } else { $pwdcorrect=0; }
1.91 albertel 688: } elsif ($howpwd eq 'krb5') {
689: $null=pack("C",0);
690: unless ($upass=~/$null/) {
691: my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
692: my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
693: my $krbserver=&Authen::Krb5::parse_name($krbservice);
694: my $credentials=&Authen::Krb5::cc_default();
695: $credentials->initialize($krbclient);
696: my $krbreturn =
697: &Authen::Krb5::get_in_tkt_with_password(
698: $krbclient,$krbserver,$upass,$credentials);
1.92 albertel 699: # unless ($krbreturn) {
700: # &logthis("Krb5 Error: ".
701: # &Authen::Krb5::error());
702: # }
1.91 albertel 703: $pwdcorrect = ($krbreturn == 1);
704: } else { $pwdcorrect=0; }
1.50 albertel 705: } elsif ($howpwd eq 'localauth') {
1.49 albertel 706: $pwdcorrect=&localauth::localauth($uname,$upass,
707: $contentpwd);
708: }
1.2 www 709: if ($pwdcorrect) {
1.1 albertel 710: print $client "authorized\n";
711: } else {
712: print $client "non_authorized\n";
713: }
714: } else {
715: print $client "unknown_user\n";
716: }
717: } else {
718: print $client "refused\n";
719: }
720: # ---------------------------------------------------------------------- passwd
721: } elsif ($userinput =~ /^passwd/) {
722: if ($wasenc==1) {
723: my
724: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
725: chomp($npass);
1.32 www 726: $upass=&unescape($upass);
727: $npass=&unescape($npass);
1.72 matthew 728: &logthis("Trying to change password for $uname");
729: my $proname=propath($udom,$uname);
1.1 albertel 730: my $passfilename="$proname/passwd";
731: if (-e $passfilename) {
732: my $realpasswd;
733: { my $pf = IO::File->new($passfilename);
734: $realpasswd=<$pf>; }
735: chomp($realpasswd);
1.2 www 736: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
737: if ($howpwd eq 'internal') {
738: if (crypt($upass,$contentpwd) eq $contentpwd) {
739: my $salt=time;
740: $salt=substr($salt,6,2);
741: my $ncpass=crypt($npass,$salt);
1.1 albertel 742: { my $pf = IO::File->new(">$passfilename");
1.31 www 743: print $pf "internal:$ncpass\n"; }
1.72 matthew 744: &logthis("Result of password change for $uname: pwchange_success");
1.1 albertel 745: print $client "ok\n";
1.2 www 746: } else {
747: print $client "non_authorized\n";
748: }
1.72 matthew 749: } elsif ($howpwd eq 'unix') {
750: # Unix means we have to access /etc/password
751: # one way or another.
752: # First: Make sure the current password is
753: # correct
754: $contentpwd=(getpwnam($uname))[1];
755: my $pwdcorrect = "0";
756: my $pwauth_path="/usr/local/sbin/pwauth";
757: unless ($contentpwd eq 'x') {
758: $pwdcorrect=
759: (crypt($upass,$contentpwd) eq $contentpwd);
760: } elsif (-e $pwauth_path) {
761: open PWAUTH, "|$pwauth_path" or
762: die "Cannot invoke authentication";
763: print PWAUTH "$uname\n$upass\n";
764: close PWAUTH;
765: $pwdcorrect=!$?;
766: }
767: if ($pwdcorrect) {
768: my $execdir=$perlvar{'lonDaemons'};
769: my $pf = IO::File->new("|$execdir/lcpasswd");
770: print $pf "$uname\n$npass\n$npass\n";
771: close $pf;
772: my $result = ($?>0 ? 'pwchange_failure'
773: : 'ok');
1.96 ! foxr 774: &logthis("Result of password change for $uname: ".
! 775: &lcpasswdstrerror($?));
1.72 matthew 776: print $client "$result\n";
777: } else {
778: print $client "non_authorized\n";
779: }
780: } else {
1.2 www 781: print $client "auth_mode_error\n";
1.1 albertel 782: }
783: } else {
784: print $client "unknown_user\n";
1.31 www 785: }
786: } else {
787: print $client "refused\n";
788: }
789: # -------------------------------------------------------------------- makeuser
790: } elsif ($userinput =~ /^makeuser/) {
1.91 albertel 791: &Debug("Make user received");
1.56 harris41 792: my $oldumask=umask(0077);
1.31 www 793: if ($wasenc==1) {
794: my
795: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1.77 foxr 796: &Debug("cmd =".$cmd." $udom =".$udom.
797: " uname=".$uname);
1.31 www 798: chomp($npass);
1.32 www 799: $npass=&unescape($npass);
1.31 www 800: my $proname=propath($udom,$uname);
801: my $passfilename="$proname/passwd";
1.77 foxr 802: &Debug("Password file created will be:".
803: $passfilename);
1.31 www 804: if (-e $passfilename) {
805: print $client "already_exists\n";
806: } elsif ($udom ne $perlvar{'lonDefDomain'}) {
807: print $client "not_right_domain\n";
808: } else {
809: @fpparts=split(/\//,$proname);
810: $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
811: $fperror='';
812: for ($i=3;$i<=$#fpparts;$i++) {
813: $fpnow.='/'.$fpparts[$i];
814: unless (-e $fpnow) {
815: unless (mkdir($fpnow,0777)) {
1.65 www 816: $fperror="error:$!";
1.31 www 817: }
818: }
819: }
820: unless ($fperror) {
1.91 albertel 821: my $result=&make_passwd_file($umode,$npass,
822: $passfilename);
823: print $client $result;
1.31 www 824: } else {
825: print $client "$fperror\n";
826: }
1.55 harris41 827: }
828: } else {
829: print $client "refused\n";
830: }
1.56 harris41 831: umask($oldumask);
1.55 harris41 832: # -------------------------------------------------------------- changeuserauth
833: } elsif ($userinput =~ /^changeuserauth/) {
1.77 foxr 834: &Debug("Changing authorization");
835: if ($wasenc==1) {
1.55 harris41 836: my
1.91 albertel 837: ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
1.55 harris41 838: chomp($npass);
1.77 foxr 839: &Debug("cmd = ".$cmd." domain= ".$udom.
840: "uname =".$uname." umode= ".$umode);
1.55 harris41 841: $npass=&unescape($npass);
1.91 albertel 842: my $proname=&propath($udom,$uname);
1.55 harris41 843: my $passfilename="$proname/passwd";
844: if ($udom ne $perlvar{'lonDefDomain'}) {
845: print $client "not_right_domain\n";
846: } else {
1.93 albertel 847: my $result=&make_passwd_file($umode,$npass,
848: $passfilename);
1.91 albertel 849: print $client $result;
1.1 albertel 850: }
851: } else {
852: print $client "refused\n";
853: }
854: # ------------------------------------------------------------------------ home
855: } elsif ($userinput =~ /^home/) {
856: my ($cmd,$udom,$uname)=split(/:/,$userinput);
857: chomp($uname);
858: my $proname=propath($udom,$uname);
859: if (-e $proname) {
860: print $client "found\n";
861: } else {
862: print $client "not_found\n";
863: }
864: # ---------------------------------------------------------------------- update
865: } elsif ($userinput =~ /^update/) {
866: my ($cmd,$fname)=split(/:/,$userinput);
867: my $ownership=ishome($fname);
868: if ($ownership eq 'not_owner') {
869: if (-e $fname) {
870: my ($dev,$ino,$mode,$nlink,
871: $uid,$gid,$rdev,$size,
872: $atime,$mtime,$ctime,
873: $blksize,$blocks)=stat($fname);
874: $now=time;
875: $since=$now-$atime;
876: if ($since>$perlvar{'lonExpire'}) {
877: $reply=
878: reply("unsub:$fname","$hostid{$clientip}");
879: unlink("$fname");
880: } else {
881: my $transname="$fname.in.transfer";
882: my $remoteurl=
883: reply("sub:$fname","$hostid{$clientip}");
884: my $response;
885: {
886: my $ua=new LWP::UserAgent;
887: my $request=new HTTP::Request('GET',"$remoteurl");
888: $response=$ua->request($request,$transname);
889: }
890: if ($response->is_error()) {
1.24 albertel 891: unlink($transname);
1.1 albertel 892: my $message=$response->status_line;
893: &logthis(
894: "LWP GET: $message for $fname ($remoteurl)");
895: } else {
1.14 www 896: if ($remoteurl!~/\.meta$/) {
1.28 www 897: my $ua=new LWP::UserAgent;
1.14 www 898: my $mrequest=
899: new HTTP::Request('GET',$remoteurl.'.meta');
900: my $mresponse=
901: $ua->request($mrequest,$fname.'.meta');
902: if ($mresponse->is_error()) {
903: unlink($fname.'.meta');
904: }
905: }
1.1 albertel 906: rename($transname,$fname);
907: }
908: }
909: print $client "ok\n";
910: } else {
911: print $client "not_found\n";
912: }
913: } else {
914: print $client "rejected\n";
915: }
1.85 www 916: # -------------------------------------- fetch a user file from a remote server
917: } elsif ($userinput =~ /^fetchuserfile/) {
1.86 www 918: my ($cmd,$fname)=split(/:/,$userinput);
919: my ($udom,$uname,$ufile)=split(/\//,$fname);
920: my $udir=propath($udom,$uname).'/userfiles';
1.88 albertel 921: unless (-e $udir) { mkdir($udir,0770); }
1.86 www 922: if (-e $udir) {
923: $ufile=~s/^[\.\~]+//;
924: $ufile=~s/\///g;
925: my $transname=$udir.'/'.$ufile;
926: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
927: my $response;
928: {
929: my $ua=new LWP::UserAgent;
930: my $request=new HTTP::Request('GET',"$remoteurl");
931: $response=$ua->request($request,$transname);
932: }
933: if ($response->is_error()) {
934: unlink($transname);
935: my $message=$response->status_line;
936: &logthis(
937: "LWP GET: $message for $fname ($remoteurl)");
938: print $client "failed\n";
939: } else {
940: print $client "ok\n";
941: }
942: } else {
943: print $client "not_home\n";
944: }
1.85 www 945: # ------------------------------------------ authenticate access to a user file
1.86 www 946: } elsif ($userinput =~ /^tokenauthuserfile/) {
1.85 www 947: my ($cmd,$fname,$session)=split(/:/,$userinput);
1.86 www 948: chomp($session);
949: $reply='non_auth';
950: if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
951: $session.'.id')) {
952: while ($line=<ENVIN>) {
953: if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
954: }
955: close(ENVIN);
956: print $client $reply."\n";
957: } else {
958: print $client "invalid_token\n";
959: }
1.1 albertel 960: # ----------------------------------------------------------------- unsubscribe
961: } elsif ($userinput =~ /^unsub/) {
962: my ($cmd,$fname)=split(/:/,$userinput);
963: if (-e $fname) {
1.84 albertel 964: print $client &unsub($client,$fname,$clientip);
1.1 albertel 965: } else {
966: print $client "not_found\n";
967: }
968: # ------------------------------------------------------------------- subscribe
969: } elsif ($userinput =~ /^sub/) {
1.84 albertel 970: print $client &subscribe($userinput,$clientip);
1.12 harris41 971: # ------------------------------------------------------------------------- log
972: } elsif ($userinput =~ /^log/) {
973: my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
974: chomp($what);
975: my $proname=propath($udom,$uname);
976: my $now=time;
977: {
978: my $hfh;
979: if ($hfh=IO::File->new(">>$proname/activity.log")) {
980: print $hfh "$now:$hostid{$clientip}:$what\n";
981: print $client "ok\n";
982: } else {
983: print $client "error:$!\n";
984: }
985: }
1.1 albertel 986: # ------------------------------------------------------------------------- put
987: } elsif ($userinput =~ /^put/) {
1.6 www 988: my ($cmd,$udom,$uname,$namespace,$what)
1.1 albertel 989: =split(/:/,$userinput);
1.8 www 990: $namespace=~s/\//\_/g;
1.6 www 991: $namespace=~s/\W//g;
992: if ($namespace ne 'roles') {
1.1 albertel 993: chomp($what);
994: my $proname=propath($udom,$uname);
995: my $now=time;
1.48 www 996: unless ($namespace=~/^nohist\_/) {
1.1 albertel 997: my $hfh;
998: if (
999: $hfh=IO::File->new(">>$proname/$namespace.hist")
1000: ) { print $hfh "P:$now:$what\n"; }
1001: }
1002: my @pairs=split(/\&/,$what);
1.4 www 1003: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1.1 albertel 1004: foreach $pair (@pairs) {
1005: ($key,$value)=split(/=/,$pair);
1006: $hash{$key}=$value;
1007: }
1.4 www 1008: if (untie(%hash)) {
1.1 albertel 1009: print $client "ok\n";
1010: } else {
1011: print $client "error:$!\n";
1012: }
1013: } else {
1014: print $client "error:$!\n";
1015: }
1.6 www 1016: } else {
1017: print $client "refused\n";
1018: }
1019: # -------------------------------------------------------------------- rolesput
1020: } elsif ($userinput =~ /^rolesput/) {
1.77 foxr 1021: &Debug("rolesput");
1.6 www 1022: if ($wasenc==1) {
1023: my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
1024: =split(/:/,$userinput);
1.77 foxr 1025: &Debug("cmd = ".$cmd." exedom= ".$exedom.
1026: "user = ".$exeuser." udom=".$udom.
1027: "what = ".$what);
1.6 www 1028: my $namespace='roles';
1029: chomp($what);
1030: my $proname=propath($udom,$uname);
1031: my $now=time;
1032: {
1033: my $hfh;
1034: if (
1035: $hfh=IO::File->new(">>$proname/$namespace.hist")
1036: ) {
1037: print $hfh "P:$now:$exedom:$exeuser:$what\n";
1038: }
1039: }
1040: my @pairs=split(/\&/,$what);
1041: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1042: foreach $pair (@pairs) {
1043: ($key,$value)=split(/=/,$pair);
1.78 foxr 1044: &ManagePermissions($key, $udom, $uname,
1045: &GetAuthType( $udom,
1046: $uname));
1.6 www 1047: $hash{$key}=$value;
1.78 foxr 1048:
1.6 www 1049: }
1050: if (untie(%hash)) {
1051: print $client "ok\n";
1052: } else {
1053: print $client "error:$!\n";
1054: }
1055: } else {
1056: print $client "error:$!\n";
1057: }
1058: } else {
1059: print $client "refused\n";
1060: }
1.1 albertel 1061: # ------------------------------------------------------------------------- get
1062: } elsif ($userinput =~ /^get/) {
1063: my ($cmd,$udom,$uname,$namespace,$what)
1064: =split(/:/,$userinput);
1.8 www 1065: $namespace=~s/\//\_/g;
1.1 albertel 1066: $namespace=~s/\W//g;
1067: chomp($what);
1068: my @queries=split(/\&/,$what);
1069: my $proname=propath($udom,$uname);
1070: my $qresult='';
1.20 www 1071: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1.1 albertel 1072: for ($i=0;$i<=$#queries;$i++) {
1073: $qresult.="$hash{$queries[$i]}&";
1074: }
1.4 www 1075: if (untie(%hash)) {
1.1 albertel 1076: $qresult=~s/\&$//;
1077: print $client "$qresult\n";
1078: } else {
1079: print $client "error:$!\n";
1080: }
1081: } else {
1082: print $client "error:$!\n";
1083: }
1084: # ------------------------------------------------------------------------ eget
1085: } elsif ($userinput =~ /^eget/) {
1086: my ($cmd,$udom,$uname,$namespace,$what)
1087: =split(/:/,$userinput);
1.8 www 1088: $namespace=~s/\//\_/g;
1.1 albertel 1089: $namespace=~s/\W//g;
1090: chomp($what);
1091: my @queries=split(/\&/,$what);
1092: my $proname=propath($udom,$uname);
1093: my $qresult='';
1.20 www 1094: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1.1 albertel 1095: for ($i=0;$i<=$#queries;$i++) {
1096: $qresult.="$hash{$queries[$i]}&";
1097: }
1.4 www 1098: if (untie(%hash)) {
1.1 albertel 1099: $qresult=~s/\&$//;
1100: if ($cipher) {
1101: my $cmdlength=length($qresult);
1102: $qresult.=" ";
1103: my $encqresult='';
1104: for
1105: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
1106: $encqresult.=
1107: unpack("H16",
1108: $cipher->encrypt(substr($qresult,$encidx,8)));
1109: }
1110: print $client "enc:$cmdlength:$encqresult\n";
1111: } else {
1112: print $client "error:no_key\n";
1113: }
1114: } else {
1115: print $client "error:$!\n";
1116: }
1117: } else {
1118: print $client "error:$!\n";
1119: }
1120: # ------------------------------------------------------------------------- del
1121: } elsif ($userinput =~ /^del/) {
1122: my ($cmd,$udom,$uname,$namespace,$what)
1123: =split(/:/,$userinput);
1.8 www 1124: $namespace=~s/\//\_/g;
1.1 albertel 1125: $namespace=~s/\W//g;
1126: chomp($what);
1127: my $proname=propath($udom,$uname);
1128: my $now=time;
1.48 www 1129: unless ($namespace=~/^nohist\_/) {
1.1 albertel 1130: my $hfh;
1131: if (
1132: $hfh=IO::File->new(">>$proname/$namespace.hist")
1133: ) { print $hfh "D:$now:$what\n"; }
1134: }
1135: my @keys=split(/\&/,$what);
1.4 www 1136: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1.1 albertel 1137: foreach $key (@keys) {
1138: delete($hash{$key});
1139: }
1.4 www 1140: if (untie(%hash)) {
1.1 albertel 1141: print $client "ok\n";
1142: } else {
1143: print $client "error:$!\n";
1144: }
1145: } else {
1146: print $client "error:$!\n";
1147: }
1148: # ------------------------------------------------------------------------ keys
1149: } elsif ($userinput =~ /^keys/) {
1150: my ($cmd,$udom,$uname,$namespace)
1151: =split(/:/,$userinput);
1.8 www 1152: $namespace=~s/\//\_/g;
1.1 albertel 1153: $namespace=~s/\W//g;
1154: my $proname=propath($udom,$uname);
1155: my $qresult='';
1.20 www 1156: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1.1 albertel 1157: foreach $key (keys %hash) {
1158: $qresult.="$key&";
1159: }
1.4 www 1160: if (untie(%hash)) {
1.1 albertel 1161: $qresult=~s/\&$//;
1162: print $client "$qresult\n";
1163: } else {
1164: print $client "error:$!\n";
1165: }
1166: } else {
1167: print $client "error:$!\n";
1168: }
1169: # ------------------------------------------------------------------------ dump
1170: } elsif ($userinput =~ /^dump/) {
1.62 www 1171: my ($cmd,$udom,$uname,$namespace,$regexp)
1.1 albertel 1172: =split(/:/,$userinput);
1.8 www 1173: $namespace=~s/\//\_/g;
1.1 albertel 1174: $namespace=~s/\W//g;
1.62 www 1175: if (defined($regexp)) {
1176: $regexp=&unescape($regexp);
1177: } else {
1178: $regexp='.';
1179: }
1.1 albertel 1180: my $proname=propath($udom,$uname);
1181: my $qresult='';
1.20 www 1182: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1.90 stredwic 1183: study($regexp);
1.1 albertel 1184: foreach $key (keys %hash) {
1.90 stredwic 1185: my $unescapeKey = &unescape($key);
1186: if (eval('$unescapeKey=~/$regexp/')) {
1.62 www 1187: $qresult.="$key=$hash{$key}&";
1.90 stredwic 1188: }
1.7 www 1189: }
1190: if (untie(%hash)) {
1191: $qresult=~s/\&$//;
1192: print $client "$qresult\n";
1193: } else {
1194: print $client "error:$!\n";
1195: }
1196: } else {
1197: print $client "error:$!\n";
1198: }
1199: # ----------------------------------------------------------------------- store
1200: } elsif ($userinput =~ /^store/) {
1201: my ($cmd,$udom,$uname,$namespace,$rid,$what)
1202: =split(/:/,$userinput);
1.8 www 1203: $namespace=~s/\//\_/g;
1.7 www 1204: $namespace=~s/\W//g;
1205: if ($namespace ne 'roles') {
1206: chomp($what);
1207: my $proname=propath($udom,$uname);
1208: my $now=time;
1.48 www 1209: unless ($namespace=~/^nohist\_/) {
1.7 www 1210: my $hfh;
1211: if (
1212: $hfh=IO::File->new(">>$proname/$namespace.hist")
1213: ) { print $hfh "P:$now:$rid:$what\n"; }
1214: }
1215: my @pairs=split(/\&/,$what);
1216:
1217: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) {
1218: my @previouskeys=split(/&/,$hash{"keys:$rid"});
1219: my $key;
1220: $hash{"version:$rid"}++;
1221: my $version=$hash{"version:$rid"};
1222: my $allkeys='';
1223: foreach $pair (@pairs) {
1224: ($key,$value)=split(/=/,$pair);
1225: $allkeys.=$key.':';
1226: $hash{"$version:$rid:$key"}=$value;
1227: }
1.36 www 1228: $hash{"$version:$rid:timestamp"}=$now;
1229: $allkeys.='timestamp';
1.7 www 1230: $hash{"$version:keys:$rid"}=$allkeys;
1231: if (untie(%hash)) {
1232: print $client "ok\n";
1233: } else {
1234: print $client "error:$!\n";
1235: }
1236: } else {
1237: print $client "error:$!\n";
1238: }
1239: } else {
1240: print $client "refused\n";
1241: }
1242: # --------------------------------------------------------------------- restore
1243: } elsif ($userinput =~ /^restore/) {
1244: my ($cmd,$udom,$uname,$namespace,$rid)
1245: =split(/:/,$userinput);
1.8 www 1246: $namespace=~s/\//\_/g;
1.7 www 1247: $namespace=~s/\W//g;
1248: chomp($rid);
1249: my $proname=propath($udom,$uname);
1250: my $qresult='';
1.20 www 1251: if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) {
1.7 www 1252: my $version=$hash{"version:$rid"};
1253: $qresult.="version=$version&";
1254: my $scope;
1255: for ($scope=1;$scope<=$version;$scope++) {
1256: my $vkeys=$hash{"$scope:keys:$rid"};
1257: my @keys=split(/:/,$vkeys);
1258: my $key;
1259: $qresult.="$scope:keys=$vkeys&";
1260: foreach $key (@keys) {
1.21 www 1261: $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
1.7 www 1262: }
1.1 albertel 1263: }
1.4 www 1264: if (untie(%hash)) {
1.1 albertel 1265: $qresult=~s/\&$//;
1266: print $client "$qresult\n";
1267: } else {
1268: print $client "error:$!\n";
1269: }
1270: } else {
1271: print $client "error:$!\n";
1272: }
1.86 www 1273: # -------------------------------------------------------------------- chatsend
1274: } elsif ($userinput =~ /^chatsend/) {
1275: my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
1276: &chatadd($cdom,$cnum,$newpost);
1277: print $client "ok\n";
1278: # -------------------------------------------------------------------- chatretr
1279: } elsif ($userinput =~ /^chatretr/) {
1280: my ($cmd,$cdom,$cnum)=split(/\:/,$userinput);
1281: my $reply='';
1282: foreach (&getchat($cdom,$cnum)) {
1283: $reply.=&escape($_).':';
1284: }
1285: $reply=~s/\:$//;
1286: print $client $reply."\n";
1.12 harris41 1287: # ------------------------------------------------------------------- querysend
1288: } elsif ($userinput =~ /^querysend/) {
1.44 harris41 1289: my ($cmd,$query,
1.82 www 1290: $arg1,$arg2,$arg3)=split(/\:/,$userinput);
1.12 harris41 1291: $query=~s/\n*$//g;
1.82 www 1292: print $client "".
1.40 harris41 1293: sqlreply("$hostid{$clientip}\&$query".
1.82 www 1294: "\&$arg1"."\&$arg2"."\&$arg3")."\n";
1.12 harris41 1295: # ------------------------------------------------------------------ queryreply
1296: } elsif ($userinput =~ /^queryreply/) {
1297: my ($cmd,$id,$reply)=split(/:/,$userinput);
1298: my $store;
1.13 www 1299: my $execdir=$perlvar{'lonDaemons'};
1300: if ($store=IO::File->new(">$execdir/tmp/$id")) {
1.43 harris41 1301: $reply=~s/\&/\n/g;
1.12 harris41 1302: print $store $reply;
1303: close $store;
1.46 harris41 1304: my $store2=IO::File->new(">$execdir/tmp/$id.end");
1305: print $store2 "done\n";
1306: close $store2;
1.12 harris41 1307: print $client "ok\n";
1308: }
1309: else {
1310: print $client "error:$!\n";
1311: }
1.1 albertel 1312: # ----------------------------------------------------------------------- idput
1313: } elsif ($userinput =~ /^idput/) {
1314: my ($cmd,$udom,$what)=split(/:/,$userinput);
1315: chomp($what);
1316: $udom=~s/\W//g;
1317: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1318: my $now=time;
1319: {
1320: my $hfh;
1321: if (
1322: $hfh=IO::File->new(">>$proname.hist")
1323: ) { print $hfh "P:$now:$what\n"; }
1324: }
1325: my @pairs=split(/\&/,$what);
1.4 www 1326: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) {
1.1 albertel 1327: foreach $pair (@pairs) {
1328: ($key,$value)=split(/=/,$pair);
1329: $hash{$key}=$value;
1330: }
1.4 www 1331: if (untie(%hash)) {
1.1 albertel 1332: print $client "ok\n";
1333: } else {
1334: print $client "error:$!\n";
1335: }
1336: } else {
1337: print $client "error:$!\n";
1338: }
1339: # ----------------------------------------------------------------------- idget
1340: } elsif ($userinput =~ /^idget/) {
1341: my ($cmd,$udom,$what)=split(/:/,$userinput);
1342: chomp($what);
1343: $udom=~s/\W//g;
1344: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
1345: my @queries=split(/\&/,$what);
1346: my $qresult='';
1.20 www 1347: if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) {
1.1 albertel 1348: for ($i=0;$i<=$#queries;$i++) {
1349: $qresult.="$hash{$queries[$i]}&";
1350: }
1.4 www 1351: if (untie(%hash)) {
1.1 albertel 1352: $qresult=~s/\&$//;
1353: print $client "$qresult\n";
1354: } else {
1355: print $client "error:$!\n";
1356: }
1357: } else {
1358: print $client "error:$!\n";
1359: }
1.13 www 1360: # ---------------------------------------------------------------------- tmpput
1361: } elsif ($userinput =~ /^tmpput/) {
1362: my ($cmd,$what)=split(/:/,$userinput);
1363: my $store;
1364: $tmpsnum++;
1365: my $id=$$.'_'.$clientip.'_'.$tmpsnum;
1366: $id=~s/\W/\_/g;
1367: $what=~s/\n//g;
1368: my $execdir=$perlvar{'lonDaemons'};
1369: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
1370: print $store $what;
1371: close $store;
1372: print $client "$id\n";
1373: }
1374: else {
1375: print $client "error:$!\n";
1376: }
1377:
1378: # ---------------------------------------------------------------------- tmpget
1379: } elsif ($userinput =~ /^tmpget/) {
1380: my ($cmd,$id)=split(/:/,$userinput);
1381: chomp($id);
1382: $id=~s/\W/\_/g;
1383: my $store;
1384: my $execdir=$perlvar{'lonDaemons'};
1385: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
1386: my $reply=<$store>;
1387: print $client "$reply\n";
1388: close $store;
1389: }
1390: else {
1391: print $client "error:$!\n";
1392: }
1393:
1.5 www 1394: # -------------------------------------------------------------------------- ls
1395: } elsif ($userinput =~ /^ls/) {
1396: my ($cmd,$ulsdir)=split(/:/,$userinput);
1397: my $ulsout='';
1398: my $ulsfn;
1399: if (-e $ulsdir) {
1.83 stredwic 1400: if(-d $ulsdir) {
1401: if (opendir(LSDIR,$ulsdir)) {
1402: while ($ulsfn=readdir(LSDIR)) {
1403: my @ulsstats=stat($ulsdir.'/'.$ulsfn);
1404: $ulsout.=$ulsfn.'&'.
1405: join('&',@ulsstats).':';
1406: }
1407: closedir(LSDIR);
1408: }
1409: } else {
1410: my @ulsstats=stat($ulsdir);
1411: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
1412: }
1413: } else {
1.5 www 1414: $ulsout='no_such_dir';
1415: }
1.17 www 1416: if ($ulsout eq '') { $ulsout='empty'; }
1.5 www 1417: print $client "$ulsout\n";
1.51 www 1418: # ------------------------------------------------------------------ Hanging up
1419: } elsif (($userinput =~ /^exit/) ||
1420: ($userinput =~ /^init/)) {
1421: &logthis(
1422: "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
1423: print $client "bye\n";
1.59 www 1424: $client->close();
1.51 www 1425: last;
1.1 albertel 1426: # ------------------------------------------------------------- unknown command
1427: } else {
1428: # unknown command
1429: print $client "unknown_cmd\n";
1430: }
1.58 www 1431: # -------------------------------------------------------------------- complete
1.63 www 1432: alarm(0);
1.58 www 1433: &status('Listening to '.$hostid{$clientip});
1434: }
1.59 www 1435: # --------------------------------------------- client unknown or fishy, refuse
1.1 albertel 1436: } else {
1437: print $client "refused\n";
1.59 www 1438: $client->close();
1.9 www 1439: &logthis("<font color=blue>WARNING: "
1440: ."Rejected client $clientip, closing connection</font>");
1.75 foxr 1441: }
1442: }
1443:
1.1 albertel 1444: # =============================================================================
1.75 foxr 1445:
1446: &logthis("<font color=red>CRITICAL: "
1447: ."Disconnect from $clientip ($hostid{$clientip})</font>");
1.1 albertel 1448: # tidy up gracefully and finish
1449:
1.59 www 1450: $server->close();
1451:
1.1 albertel 1452: # this exit is VERY important, otherwise the child will become
1453: # a producer of more and more children, forking yourself into
1454: # process death.
1455: exit;
1456: }
1.78 foxr 1457: }
1458:
1459:
1460: #
1461: # Checks to see if the input roleput request was to set
1462: # an author role. If so, invokes the lchtmldir script to set
1463: # up a correct public_html
1464: # Parameters:
1465: # request - The request sent to the rolesput subchunk.
1466: # We're looking for /domain/_au
1467: # domain - The domain in which the user is having roles doctored.
1468: # user - Name of the user for which the role is being put.
1469: # authtype - The authentication type associated with the user.
1470: #
1471: sub ManagePermissions
1472: {
1473: my $request = shift;
1474: my $domain = shift;
1475: my $user = shift;
1476: my $authtype= shift;
1477:
1478: # See if the request is of the form /$domain/_au
1479:
1480: if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
1481: my $execdir = $perlvar{'lonDaemons'};
1482: my $userhome= "/home/$user" ;
1483: Debug("system $execdir/lchtmldir $userhome $system $authtype");
1484: system("$execdir/lchtmldir $userhome $user $authtype");
1485: }
1486: }
1487: #
1488: # GetAuthType - Determines the authorization type of a user in a domain.
1489:
1490: # Returns the authorization type or nouser if there is no such user.
1491: #
1492: sub GetAuthType
1493: {
1494: my $domain = shift;
1495: my $user = shift;
1496:
1.79 foxr 1497: Debug("GetAuthType( $domain, $user ) \n");
1.78 foxr 1498: my $proname = &propath($domain, $user);
1499: my $passwdfile = "$proname/passwd";
1500: if( -e $passwdfile ) {
1501: my $pf = IO::File->new($passwdfile);
1502: my $realpassword = <$pf>;
1503: chomp($realpassword);
1.79 foxr 1504: Debug("Password info = $realpassword\n");
1.78 foxr 1505: my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79 foxr 1506: Debug("Authtype = $authtype, content = $contentpwd\n");
1.78 foxr 1507: my $availinfo = '';
1.91 albertel 1508: if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78 foxr 1509: $availinfo = $contentpwd;
1510: }
1.79 foxr 1511:
1.78 foxr 1512: return "$authtype:$availinfo";
1513: }
1514: else {
1.79 foxr 1515: Debug("Returning nouser");
1.78 foxr 1516: return "nouser";
1517: }
1.1 albertel 1518: }
1519:
1.84 albertel 1520: sub addline {
1521: my ($fname,$hostid,$ip,$newline)=@_;
1522: my $contents;
1523: my $found=0;
1524: my $expr='^'.$hostid.':'.$ip.':';
1525: $expr =~ s/\./\\\./g;
1526: if ($sh=IO::File->new("$fname.subscription")) {
1527: while (my $subline=<$sh>) {
1528: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
1529: }
1530: $sh->close();
1531: }
1532: $sh=IO::File->new(">$fname.subscription");
1533: if ($contents) { print $sh $contents; }
1534: if ($newline) { print $sh $newline; }
1535: $sh->close();
1536: return $found;
1.86 www 1537: }
1538:
1539: sub getchat {
1540: my ($cdom,$cname)=@_;
1.87 www 1541: my %hash;
1542: my $proname=&propath($cdom,$cname);
1543: my @entries=();
1.88 albertel 1544: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1545: &GDBM_READER(),0640)) {
1546: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1547: untie %hash;
1.86 www 1548: }
1.87 www 1549: return @entries;
1.86 www 1550: }
1551:
1552: sub chatadd {
1.88 albertel 1553: my ($cdom,$cname,$newchat)=@_;
1554: my %hash;
1555: my $proname=&propath($cdom,$cname);
1556: my @entries=();
1557: if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
1558: &GDBM_WRCREAT(),0640)) {
1559: @entries=map { $_.':'.$hash{$_} } sort keys %hash;
1560: my $time=time;
1561: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
1562: my ($thentime,$idnum)=split(/\_/,$lastid);
1563: my $newid=$time.'_000000';
1564: if ($thentime==$time) {
1565: $idnum=~s/^0+//;
1566: $idnum++;
1567: $idnum=substr('000000'.$idnum,-6,6);
1568: $newid=$time.'_'.$idnum;
1569: }
1570: $hash{$newid}=$newchat;
1571: my $expired=$time-3600;
1572: foreach (keys %hash) {
1573: my ($thistime)=($_=~/(\d+)\_/);
1574: if ($thistime<$expired) {
1.89 www 1575: delete $hash{$_};
1.88 albertel 1576: }
1577: }
1578: untie %hash;
1.86 www 1579: }
1.84 albertel 1580: }
1581:
1582: sub unsub {
1583: my ($fname,$clientip)=@_;
1584: my $result;
1585: if (unlink("$fname.$hostid{$clientip}")) {
1586: $result="ok\n";
1587: } else {
1588: $result="not_subscribed\n";
1589: }
1590: if (-e "$fname.subscription") {
1591: my $found=&addline($fname,$hostid{$clientip},$clientip,'');
1592: if ($found) { $result="ok\n"; }
1593: } else {
1594: if ($result != "ok\n") { $result="not_subscribed\n"; }
1595: }
1596: return $result;
1597: }
1598:
1599: sub subscribe {
1600: my ($userinput,$clientip)=@_;
1601: my $result;
1602: my ($cmd,$fname)=split(/:/,$userinput);
1603: my $ownership=&ishome($fname);
1604: if ($ownership eq 'owner') {
1605: if (-e $fname) {
1606: if (-d $fname) {
1607: $result="directory\n";
1608: } else {
1609: if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
1610: $now=time;
1611: my $found=&addline($fname,$hostid{$clientip},$clientip,
1612: "$hostid{$clientip}:$clientip:$now\n");
1613: if ($found) { $result="$fname\n"; }
1614: # if they were subscribed to only meta data, delete that
1615: # subscription, when you subscribe to a file you also get
1616: # the metadata
1617: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
1618: $fname=~s/\/home\/httpd\/html\/res/raw/;
1619: $fname="http://$thisserver/".$fname;
1620: $result="$fname\n";
1621: }
1622: } else {
1623: $result="not_found\n";
1624: }
1625: } else {
1626: $result="rejected\n";
1627: }
1628: return $result;
1629: }
1.91 albertel 1630:
1631: sub make_passwd_file {
1632: my ($umode,$npass,$passfilename)=@_;
1633: my $result="ok\n";
1634: if ($umode eq 'krb4' or $umode eq 'krb5') {
1635: {
1636: my $pf = IO::File->new(">$passfilename");
1637: print $pf "$umode:$npass\n";
1638: }
1639: } elsif ($umode eq 'internal') {
1640: my $salt=time;
1641: $salt=substr($salt,6,2);
1642: my $ncpass=crypt($npass,$salt);
1643: {
1644: &Debug("Creating internal auth");
1645: my $pf = IO::File->new(">$passfilename");
1646: print $pf "internal:$ncpass\n";
1647: }
1648: } elsif ($umode eq 'localauth') {
1649: {
1650: my $pf = IO::File->new(">$passfilename");
1651: print $pf "localauth:$npass\n";
1652: }
1653: } elsif ($umode eq 'unix') {
1654: {
1655: my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
1656: {
1657: &Debug("Executing external: ".$execpath);
1658: my $se = IO::File->new("|$execpath");
1659: print $se "$uname\n";
1660: print $se "$npass\n";
1661: print $se "$npass\n";
1662: }
1663: my $pf = IO::File->new(">$passfilename");
1664: print $pf "unix:\n";
1665: }
1666: } elsif ($umode eq 'none') {
1667: {
1668: my $pf = IO::File->new(">$passfilename");
1669: print $pf "none:\n";
1670: }
1671: } else {
1672: $result="auth_mode_error\n";
1673: }
1674: return $result;
1675: }
1676:
1.61 harris41 1677: # ----------------------------------- POD (plain old documentation, CPAN style)
1678:
1679: =head1 NAME
1680:
1681: lond - "LON Daemon" Server (port "LOND" 5663)
1682:
1683: =head1 SYNOPSIS
1684:
1.74 harris41 1685: Usage: B<lond>
1686:
1687: Should only be run as user=www. This is a command-line script which
1688: is invoked by B<loncron>. There is no expectation that a typical user
1689: will manually start B<lond> from the command-line. (In other words,
1690: DO NOT START B<lond> YOURSELF.)
1.61 harris41 1691:
1692: =head1 DESCRIPTION
1693:
1.74 harris41 1694: There are two characteristics associated with the running of B<lond>,
1695: PROCESS MANAGEMENT (starting, stopping, handling child processes)
1696: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
1697: subscriptions, etc). These are described in two large
1698: sections below.
1699:
1700: B<PROCESS MANAGEMENT>
1701:
1.61 harris41 1702: Preforker - server who forks first. Runs as a daemon. HUPs.
1703: Uses IDEA encryption
1704:
1.74 harris41 1705: B<lond> forks off children processes that correspond to the other servers
1706: in the network. Management of these processes can be done at the
1707: parent process level or the child process level.
1708:
1709: B<logs/lond.log> is the location of log messages.
1710:
1711: The process management is now explained in terms of linux shell commands,
1712: subroutines internal to this code, and signal assignments:
1713:
1714: =over 4
1715:
1716: =item *
1717:
1718: PID is stored in B<logs/lond.pid>
1719:
1720: This is the process id number of the parent B<lond> process.
1721:
1722: =item *
1723:
1724: SIGTERM and SIGINT
1725:
1726: Parent signal assignment:
1727: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
1728:
1729: Child signal assignment:
1730: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also)
1731: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
1732: to restart a new child.)
1733:
1734: Command-line invocations:
1735: B<kill> B<-s> SIGTERM I<PID>
1736: B<kill> B<-s> SIGINT I<PID>
1737:
1738: Subroutine B<HUNTSMAN>:
1739: This is only invoked for the B<lond> parent I<PID>.
1740: This kills all the children, and then the parent.
1741: The B<lonc.pid> file is cleared.
1742:
1743: =item *
1744:
1745: SIGHUP
1746:
1747: Current bug:
1748: This signal can only be processed the first time
1749: on the parent process. Subsequent SIGHUP signals
1750: have no effect.
1751:
1752: Parent signal assignment:
1753: $SIG{HUP} = \&HUPSMAN;
1754:
1755: Child signal assignment:
1756: none (nothing happens)
1757:
1758: Command-line invocations:
1759: B<kill> B<-s> SIGHUP I<PID>
1760:
1761: Subroutine B<HUPSMAN>:
1762: This is only invoked for the B<lond> parent I<PID>,
1763: This kills all the children, and then the parent.
1764: The B<lond.pid> file is cleared.
1765:
1766: =item *
1767:
1768: SIGUSR1
1769:
1770: Parent signal assignment:
1771: $SIG{USR1} = \&USRMAN;
1772:
1773: Child signal assignment:
1774: $SIG{USR1}= \&logstatus;
1775:
1776: Command-line invocations:
1777: B<kill> B<-s> SIGUSR1 I<PID>
1778:
1779: Subroutine B<USRMAN>:
1780: When invoked for the B<lond> parent I<PID>,
1781: SIGUSR1 is sent to all the children, and the status of
1782: each connection is logged.
1783:
1784: =item *
1785:
1786: SIGCHLD
1787:
1788: Parent signal assignment:
1789: $SIG{CHLD} = \&REAPER;
1790:
1791: Child signal assignment:
1792: none
1793:
1794: Command-line invocations:
1795: B<kill> B<-s> SIGCHLD I<PID>
1796:
1797: Subroutine B<REAPER>:
1798: This is only invoked for the B<lond> parent I<PID>.
1799: Information pertaining to the child is removed.
1800: The socket port is cleaned up.
1801:
1802: =back
1803:
1804: B<SERVER-SIDE ACTIVITIES>
1805:
1806: Server-side information can be accepted in an encrypted or non-encrypted
1807: method.
1808:
1809: =over 4
1810:
1811: =item ping
1812:
1813: Query a client in the hosts.tab table; "Are you there?"
1814:
1815: =item pong
1816:
1817: Respond to a ping query.
1818:
1819: =item ekey
1820:
1821: Read in encrypted key, make cipher. Respond with a buildkey.
1822:
1823: =item load
1824:
1825: Respond with CPU load based on a computation upon /proc/loadavg.
1826:
1827: =item currentauth
1828:
1829: Reply with current authentication information (only over an
1830: encrypted channel).
1831:
1832: =item auth
1833:
1834: Only over an encrypted channel, reply as to whether a user's
1835: authentication information can be validated.
1836:
1837: =item passwd
1838:
1839: Allow for a password to be set.
1840:
1841: =item makeuser
1842:
1843: Make a user.
1844:
1845: =item passwd
1846:
1847: Allow for authentication mechanism and password to be changed.
1848:
1849: =item home
1.61 harris41 1850:
1.74 harris41 1851: Respond to a question "are you the home for a given user?"
1852:
1853: =item update
1854:
1855: Update contents of a subscribed resource.
1856:
1857: =item unsubscribe
1858:
1859: The server is unsubscribing from a resource.
1860:
1861: =item subscribe
1862:
1863: The server is subscribing to a resource.
1864:
1865: =item log
1866:
1867: Place in B<logs/lond.log>
1868:
1869: =item put
1870:
1871: stores hash in namespace
1872:
1873: =item rolesput
1874:
1875: put a role into a user's environment
1876:
1877: =item get
1878:
1879: returns hash with keys from array
1880: reference filled in from namespace
1881:
1882: =item eget
1883:
1884: returns hash with keys from array
1885: reference filled in from namesp (encrypts the return communication)
1886:
1887: =item rolesget
1888:
1889: get a role from a user's environment
1890:
1891: =item del
1892:
1893: deletes keys out of array from namespace
1894:
1895: =item keys
1896:
1897: returns namespace keys
1898:
1899: =item dump
1900:
1901: dumps the complete (or key matching regexp) namespace into a hash
1902:
1903: =item store
1904:
1905: stores hash permanently
1906: for this url; hashref needs to be given and should be a \%hashname; the
1907: remaining args aren't required and if they aren't passed or are '' they will
1908: be derived from the ENV
1909:
1910: =item restore
1911:
1912: returns a hash for a given url
1913:
1914: =item querysend
1915:
1916: Tells client about the lonsql process that has been launched in response
1917: to a sent query.
1918:
1919: =item queryreply
1920:
1921: Accept information from lonsql and make appropriate storage in temporary
1922: file space.
1923:
1924: =item idput
1925:
1926: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers
1927: for each student, defined perhaps by the institutional Registrar.)
1928:
1929: =item idget
1930:
1931: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers
1932: for each student, defined perhaps by the institutional Registrar.)
1933:
1934: =item tmpput
1935:
1936: Accept and store information in temporary space.
1937:
1938: =item tmpget
1939:
1940: Send along temporarily stored information.
1941:
1942: =item ls
1943:
1944: List part of a user's directory.
1945:
1946: =item Hanging up (exit or init)
1947:
1948: What to do when a client tells the server that they (the client)
1949: are leaving the network.
1950:
1951: =item unknown command
1952:
1953: If B<lond> is sent an unknown command (not in the list above),
1954: it replys to the client "unknown_cmd".
1955:
1956: =item UNKNOWN CLIENT
1957:
1958: If the anti-spoofing algorithm cannot verify the client,
1959: the client is rejected (with a "refused" message sent
1960: to the client, and the connection is closed.
1961:
1962: =back
1.61 harris41 1963:
1964: =head1 PREREQUISITES
1965:
1966: IO::Socket
1967: IO::File
1968: Apache::File
1969: Symbol
1970: POSIX
1971: Crypt::IDEA
1972: LWP::UserAgent()
1973: GDBM_File
1974: Authen::Krb4
1.91 albertel 1975: Authen::Krb5
1.61 harris41 1976:
1977: =head1 COREQUISITES
1978:
1979: =head1 OSNAMES
1980:
1981: linux
1982:
1983: =head1 SCRIPT CATEGORIES
1984:
1985: Server/Process
1986:
1987: =cut
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