Annotation of loncom/lonsql, revision 1.52
1.1 harris41 1: #!/usr/bin/perl
1.39 harris41 2:
3: # The LearningOnline Network
1.40 harris41 4: # lonsql - LON TCP-MySQL-Server Daemon for handling database requests.
1.39 harris41 5: #
1.52 ! matthew 6: # $Id: lonsql,v 1.51 2002/08/06 13:48:47 matthew Exp $
1.41 harris41 7: #
8: # Copyright Michigan State University Board of Trustees
9: #
10: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
11: #
12: # LON-CAPA is free software; you can redistribute it and/or modify
13: # it under the terms of the GNU General Public License as published by
14: # the Free Software Foundation; either version 2 of the License, or
15: # (at your option) any later version.
16: #
17: # LON-CAPA is distributed in the hope that it will be useful,
18: # but WITHOUT ANY WARRANTY; without even the implied warranty of
19: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20: # GNU General Public License for more details.
21: #
22: # You should have received a copy of the GNU General Public License
23: # along with LON-CAPA; if not, write to the Free Software
24: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25: #
26: # /home/httpd/html/adm/gpl.txt
27: #
28: # http://www.lon-capa.org/
29: #
1.51 matthew 30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsql - LON TCP-MySQL-Server Daemon for handling database requests.
36:
37: =head1 SYNOPSIS
38:
39: This script should be run as user=www.
40: Note that a lonsql.pid file contains the pid of the parent process.
41:
42: =head1 DESCRIPTION
43:
44: lonsql is many things to many people. To me, it is a source file in need
45: of documentation.
46:
47: =head1 Internals
48:
49: =over 4
50:
51: =cut
52:
53: use strict;
1.36 www 54:
1.42 harris41 55: use lib '/home/httpd/lib/perl/';
56: use LONCAPA::Configuration;
57:
1.2 harris41 58: use IO::Socket;
59: use Symbol;
1.1 harris41 60: use POSIX;
61: use IO::Select;
62: use IO::File;
63: use Socket;
64: use Fcntl;
65: use Tie::RefHash;
66: use DBI;
1.51 matthew 67: use File::Find;
68:
69: ########################################################
70: ########################################################
71:
72: =pod
73:
74: =item Global Variables
75:
76: =over 4
77:
78: =item dbh
79:
80: =back
81:
82: =cut
83:
84: ########################################################
85: ########################################################
86: my $dbh;
87:
88: ########################################################
89: ########################################################
90:
91: =pod
92:
93: =item Variables required for forking
1.1 harris41 94:
1.51 matthew 95: =over 4
96:
97: =item $MAX_CLIENTS_PER_CHILD
98:
99: The number of clients each child should process.
100:
101: =item %children
102:
103: The keys to %children are the current child process IDs
104:
105: =item $children
106:
107: The current number of children
108:
109: =back
110:
111: =cut
1.9 harris41 112:
1.51 matthew 113: ########################################################
114: ########################################################
115: my $MAX_CLIENTS_PER_CHILD = 5; # number of clients each child should process
116: my %children = (); # keys are current child process IDs
117: my $children = 0; # current number of children
118:
119: ###################################################################
120: ###################################################################
121:
122: =pod
123:
124: =item Main body of code.
125:
126: =over 4
1.45 www 127:
1.51 matthew 128: =item Read data from loncapa_apache.conf and loncapa.conf.
129:
130: =item Ensure we can access the database.
131:
132: =item Determine if there are other instances of lonsql running.
133:
134: =item Read the hosts file.
135:
136: =item Create a socket for lonsql.
137:
138: =item Fork once and dissociate from parent.
139:
140: =item Write PID to disk.
141:
142: =item Prefork children and maintain the population of children.
143:
144: =back
145:
146: =cut
147:
148: ###################################################################
149: ###################################################################
150: my $childmaxattempts=10;
151: my $run =0; # running counter to generate the query-id
152: #
153: # Read loncapa_apache.conf and loncapa.conf
154: #
155: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa_apache.conf',
156: 'loncapa.conf');
157: my %perlvar=%{$perlvarref};
158: #
159: # Make sure that database can be accessed
160: #
161: my $dbh;
162: unless ($dbh = DBI->connect("DBI:mysql:loncapa","www",
163: $perlvar{'lonSqlAccess'},
164: { RaiseError =>0,PrintError=>0})) {
165: print "Cannot connect to database!\n";
166: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
167: my $subj="LON: $perlvar{'lonHostID'} Cannot connect to database!";
168: system("echo 'Cannot connect to MySQL database!' |".
169: " mailto $emailto -s '$subj' > /dev/null");
170: exit 1;
171: } else {
172: $dbh->disconnect;
173: }
1.52 ! matthew 174:
1.51 matthew 175: #
176: # Check if other instance running
177: #
178: my $pidfile="$perlvar{'lonDaemons'}/logs/lonsql.pid";
179: if (-e $pidfile) {
180: my $lfh=IO::File->new("$pidfile");
181: my $pide=<$lfh>;
182: chomp($pide);
183: if (kill 0 => $pide) { die "already running"; }
184: }
1.52 ! matthew 185:
1.49 www 186: #
1.51 matthew 187: # Read hosts file
1.49 www 188: #
1.51 matthew 189: my %hostip;
190: my $thisserver;
191: my $PREFORK=4; # number of children to maintain, at least four spare
192: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
193: while (my $configline=<CONFIG>) {
194: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
195: chomp($ip);
196: $hostip{$ip}=$id;
197: $thisserver=$name if ($id eq $perlvar{'lonHostID'});
198: $PREFORK++;
1.45 www 199: }
1.51 matthew 200: close(CONFIG);
201: #
202: $PREFORK=int($PREFORK/4);
1.52 ! matthew 203:
1.51 matthew 204: #
205: # Create a socket to talk to lond
206: #
207: my $unixsock = "mysqlsock";
208: my $localfile="$perlvar{'lonSockDir'}/$unixsock";
209: my $server;
210: unlink ($localfile);
211: unless ($server=IO::Socket::UNIX->new(Local =>"$localfile",
212: Type => SOCK_STREAM,
213: Listen => 10)) {
214: print "in socket error:$@\n";
1.45 www 215: }
1.52 ! matthew 216:
1.51 matthew 217: #
218: # Fork once and dissociate
1.52 ! matthew 219: #
1.51 matthew 220: my $fpid=fork;
1.1 harris41 221: exit if $fpid;
222: die "Couldn't fork: $!" unless defined ($fpid);
223: POSIX::setsid() or die "Can't start new session: $!";
1.52 ! matthew 224:
1.51 matthew 225: #
226: # Write our PID on disk
227: my $execdir=$perlvar{'lonDaemons'};
1.1 harris41 228: open (PIDSAVE,">$execdir/logs/lonsql.pid");
229: print PIDSAVE "$$\n";
230: close(PIDSAVE);
231: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.52 ! matthew 232:
1.51 matthew 233: #
234: # Ignore signals generated during initial startup
1.1 harris41 235: $SIG{HUP}=$SIG{USR1}='IGNORE';
1.51 matthew 236: # Now we are on our own
237: # Fork off our children.
1.2 harris41 238: for (1 .. $PREFORK) {
239: make_new_child();
1.1 harris41 240: }
1.52 ! matthew 241:
1.51 matthew 242: #
1.2 harris41 243: # Install signal handlers.
1.1 harris41 244: $SIG{CHLD} = \&REAPER;
245: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
246: $SIG{HUP} = \&HUPSMAN;
1.52 ! matthew 247:
1.51 matthew 248: #
1.1 harris41 249: # And maintain the population.
250: while (1) {
251: sleep; # wait for a signal (i.e., child's death)
1.51 matthew 252: for (my $i = $children; $i < $PREFORK; $i++) {
1.2 harris41 253: make_new_child(); # top up the child pool
1.1 harris41 254: }
255: }
256:
1.51 matthew 257: ########################################################
258: ########################################################
259:
260: =pod
261:
262: =item &make_new_child
263:
264: Inputs: None
265:
266: Returns: None
267:
268: =cut
1.2 harris41 269:
1.51 matthew 270: ########################################################
271: ########################################################
1.1 harris41 272: sub make_new_child {
273: my $pid;
274: my $sigset;
1.51 matthew 275: #
1.1 harris41 276: # block signal for fork
277: $sigset = POSIX::SigSet->new(SIGINT);
278: sigprocmask(SIG_BLOCK, $sigset)
279: or die "Can't block SIGINT for fork: $!\n";
1.51 matthew 280: #
1.2 harris41 281: die "fork: $!" unless defined ($pid = fork);
1.51 matthew 282: #
1.1 harris41 283: if ($pid) {
284: # Parent records the child's birth and returns.
285: sigprocmask(SIG_UNBLOCK, $sigset)
286: or die "Can't unblock SIGINT for fork: $!\n";
287: $children{$pid} = 1;
288: $children++;
289: return;
290: } else {
1.2 harris41 291: # Child can *not* return from this subroutine.
1.1 harris41 292: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
293: # unblock signals
294: sigprocmask(SIG_UNBLOCK, $sigset)
295: or die "Can't unblock SIGINT for fork: $!\n";
1.2 harris41 296: #open database handle
297: # making dbh global to avoid garbage collector
1.51 matthew 298: unless ($dbh = DBI->connect("DBI:mysql:loncapa","www",
299: $perlvar{'lonSqlAccess'},
300: { RaiseError =>0,PrintError=>0})) {
301: sleep(10+int(rand(20)));
302: &logthis("<font color=blue>WARNING: Couldn't connect to database".
303: ": $@</font>");
304: # "($st secs): $@</font>");
305: print "database handle error\n";
306: exit;
307: }
308: # make sure that a database disconnection occurs with
309: # ending kill signals
1.2 harris41 310: $SIG{TERM}=$SIG{INT}=$SIG{QUIT}=$SIG{__DIE__}=\&DISCONNECT;
1.1 harris41 311: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
1.51 matthew 312: for (my $i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
313: my $client = $server->accept() or last;
1.2 harris41 314: # do something with the connection
1.1 harris41 315: $run = $run+1;
1.2 harris41 316: my $userinput = <$client>;
317: chomp($userinput);
1.51 matthew 318: #
1.45 www 319: my ($conserver,$query,
320: $arg1,$arg2,$arg3)=split(/&/,$userinput);
321: my $query=unescape($query);
1.51 matthew 322: #
1.2 harris41 323: #send query id which is pid_unixdatetime_runningcounter
1.51 matthew 324: my $queryid = $thisserver;
1.2 harris41 325: $queryid .="_".($$)."_";
326: $queryid .= time."_";
327: $queryid .= $run;
328: print $client "$queryid\n";
1.51 matthew 329: #
1.47 www 330: &logthis("QUERY: $query - $arg1 - $arg2 - $arg3");
1.25 harris41 331: sleep 1;
1.51 matthew 332: #
1.45 www 333: my $result='';
1.51 matthew 334: #
335: # At this point, query is received, query-ID assigned and sent
336: # back, $query eq 'logquery' will mean that this is a query
337: # against log-files
338: if (($query eq 'userlog') || ($query eq 'courselog')) {
339: # beginning of log query
340: my $udom = &unescape($arg1);
341: my $uname = &unescape($arg2);
342: my $command = &unescape($arg3);
343: my $path = &propath($udom,$uname);
344: if (-e "$path/activity.log") {
345: if ($query eq 'userlog') {
346: $result=&userlog($path,$command);
347: } else {
348: $result=&courselog($path,$command);
349: }
350: } else {
351: &logthis('Unable to do log query: '.$uname.'@'.$udom);
352: $result='no_such_file';
353: }
354: # end of log query
355: } else {
356: # Do an sql query
357: $result = &do_sql_query($query,$arg1,$arg2);
358: }
1.50 matthew 359: # result does not need to be escaped because it has already been
360: # escaped.
361: #$result=&escape($result);
1.51 matthew 362: # reply with result, append \n unless already there
1.44 www 363: $result.="\n" unless ($result=~/\n$/);
1.17 harris41 364: &reply("queryreply:$queryid:$result",$conserver);
1.1 harris41 365: }
366: # tidy up gracefully and finish
1.51 matthew 367: #
368: # close the database handle
1.2 harris41 369: $dbh->disconnect
1.51 matthew 370: or &logthis("<font color=blue>WARNING: Couldn't disconnect".
371: " from database $DBI::errstr : $@</font>");
1.1 harris41 372: # this exit is VERY important, otherwise the child will become
373: # a producer of more and more children, forking yourself into
374: # process death.
375: exit;
376: }
1.2 harris41 377: }
1.1 harris41 378:
1.51 matthew 379: ########################################################
380: ########################################################
381:
382: =pod
383:
384: =item &do_sql_query
385:
386: Runs an sql metadata table query.
387:
388: Inputs: $query, $custom, $customshow
389:
390: Returns: A string containing escaped results.
391:
392: =cut
393:
394: ########################################################
395: ########################################################
396: {
397: my @metalist;
398:
399: sub process_file {
400: if ( -e $_ && # file exists
401: -f $_ && # and is a normal file
402: /\.meta$/ && # ends in meta
403: ! /^.+\.\d+\.[^\.]+\.meta$/ # is not a previous version
404: ) {
405: push(@metalist,$File::Find::name);
406: }
407: }
408:
409: sub do_sql_query {
410: my ($query,$custom,$customshow) = @_;
411: $custom = &unescape($custom);
412: $customshow = &unescape($customshow);
413: #
414: @metalist = ();
415: #
416: my $result = '';
417: my @results = ();
418: my @files;
419: my $subsetflag=0;
420: #
421: if ($query) {
422: #prepare and execute the query
423: my $sth = $dbh->prepare($query);
424: unless ($sth->execute()) {
425: &logthis("<font color=blue>WARNING: ".
426: "Could not retrieve from database: $@</font>");
427: } else {
428: my $aref=$sth->fetchall_arrayref;
429: foreach my $row (@$aref) {
430: push @files,@{$row}[3] if ($custom or $customshow);
431: my @b=map { &escape($_); } @$row;
432: push @results,join(",", @b);
433: # Build up the @files array with the LON-CAPA urls
434: # of the resources.
435: }
436: }
437: }
438: # do custom metadata searching here and build into result
439: return join("&",@results) if (! ($custom or $customshow));
440: # Only get here if there is a custom query or custom show request
441: &logthis("Doing custom query for $custom");
442: if ($query) {
443: @metalist=map {
444: $perlvar{'lonDocRoot'}.$_.'.meta';
445: } @files;
446: } else {
447: my $dir = "$perlvar{'lonDocRoot'}/res/$perlvar{'lonDefDomain'}";
448: @metalist=();
449: opendir(RESOURCES,$dir);
450: my @homeusers=grep {
451: &ishome($dir.'/'.$_);
452: } grep {!/^\.\.?$/} readdir(RESOURCES);
453: closedir RESOURCES;
454: # Define the
455: foreach my $user (@homeusers) {
456: find (\&process_file,$dir.'/'.$user);
457: }
458: }
459: # if file is indicated in sql database and
460: # not part of sql-relevant query, do not pattern match.
461: #
462: # if file is not in sql database, output error.
463: #
464: # if file is indicated in sql database and is
465: # part of query result list, then do the pattern match.
466: my $customresult='';
467: my @results;
468: foreach my $metafile (@metalist) {
469: my $fh=IO::File->new($metafile);
470: my @lines=<$fh>;
471: my $stuff=join('',@lines);
472: if ($stuff=~/$custom/s) {
473: foreach my $f ('abstract','author','copyright',
474: 'creationdate','keywords','language',
475: 'lastrevisiondate','mime','notes',
476: 'owner','subject','title') {
477: $stuff=~s/\n?\<$f[^\>]*\>.*?<\/$f[^\>]*\>\n?//s;
478: }
479: my $mfile=$metafile;
480: my $docroot=$perlvar{'lonDocRoot'};
481: $mfile=~s/^$docroot//;
482: $mfile=~s/\.meta$//;
483: unless ($query) {
484: my $q2="SELECT * FROM metadata WHERE url ".
485: " LIKE BINARY '?'";
486: my $sth = $dbh->prepare($q2);
487: $sth->execute($mfile);
488: my $aref=$sth->fetchall_arrayref;
489: foreach my $a (@$aref) {
490: my @b=map { &escape($_)} @$a;
491: push @results,join(",", @b);
492: }
493: }
494: # &logthis("found: $stuff");
495: $customresult.='&custom='.&escape($mfile).','.
496: escape($stuff);
497: }
498: }
499: $result=join("&",@results) unless $query;
500: $result.=$customresult;
501: #
502: return $result;
503: } # End of &do_sql_query
504:
505: } # End of scoping curly braces for &process_file and &do_sql_query
506: ########################################################
507: ########################################################
508:
509: =pod
510:
511: =item &logthis
512:
513: Inputs: $message, the message to log
514:
515: Returns: nothing
516:
517: Writes $message to the logfile.
518:
519: =cut
520:
521: ########################################################
522: ########################################################
523: sub logthis {
524: my $message=shift;
525: my $execdir=$perlvar{'lonDaemons'};
1.52 ! matthew 526: my $fh=IO::File->new(">>$execdir/logs/lonsql.log");
1.51 matthew 527: my $now=time;
528: my $local=localtime($now);
529: print $fh "$local ($$): $message\n";
1.2 harris41 530: }
1.1 harris41 531:
1.2 harris41 532: # -------------------------------------------------- Non-critical communication
1.1 harris41 533:
1.51 matthew 534: ########################################################
535: ########################################################
536:
537: =pod
538:
539: =item &subreply
540:
541: Sends a command to a server. Called only by &reply.
542:
543: Inputs: $cmd,$server
544:
545: Returns: The results of the message or 'con_lost' on error.
546:
547: =cut
548:
549: ########################################################
550: ########################################################
1.2 harris41 551: sub subreply {
552: my ($cmd,$server)=@_;
553: my $peerfile="$perlvar{'lonSockDir'}/$server";
554: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
555: Type => SOCK_STREAM,
556: Timeout => 10)
557: or return "con_lost";
558: print $sclient "$cmd\n";
559: my $answer=<$sclient>;
560: chomp($answer);
1.51 matthew 561: $answer="con_lost" if (!$answer);
1.2 harris41 562: return $answer;
563: }
1.1 harris41 564:
1.51 matthew 565: ########################################################
566: ########################################################
567:
568: =pod
569:
570: =item &reply
571:
572: Sends a command to a server.
573:
574: Inputs: $cmd,$server
575:
576: Returns: The results of the message or 'con_lost' on error.
577:
578: =cut
579:
580: ########################################################
581: ########################################################
1.2 harris41 582: sub reply {
583: my ($cmd,$server)=@_;
584: my $answer;
585: if ($server ne $perlvar{'lonHostID'}) {
586: $answer=subreply($cmd,$server);
587: if ($answer eq 'con_lost') {
588: $answer=subreply("ping",$server);
589: $answer=subreply($cmd,$server);
590: }
591: } else {
592: $answer='self_reply';
1.33 harris41 593: $answer=subreply($cmd,$server);
1.2 harris41 594: }
595: return $answer;
596: }
1.1 harris41 597:
1.51 matthew 598: ########################################################
599: ########################################################
600:
601: =pod
602:
603: =item &escape
604:
605: Escape special characters in a string.
1.3 harris41 606:
1.51 matthew 607: Inputs: string to escape
608:
609: Returns: The input string with special characters escaped.
610:
611: =cut
612:
613: ########################################################
614: ########################################################
1.3 harris41 615: sub escape {
616: my $str=shift;
617: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
618: return $str;
619: }
620:
1.51 matthew 621: ########################################################
622: ########################################################
623:
624: =pod
625:
626: =item &unescape
627:
628: Unescape special characters in a string.
1.3 harris41 629:
1.51 matthew 630: Inputs: string to unescape
631:
632: Returns: The input string with special characters unescaped.
633:
634: =cut
635:
636: ########################################################
637: ########################################################
1.3 harris41 638: sub unescape {
639: my $str=shift;
640: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
641: return $str;
642: }
1.34 harris41 643:
1.51 matthew 644: ########################################################
645: ########################################################
646:
647: =pod
648:
649: =item &ishome
650:
651: Determine if the current machine is the home server for a user.
652: The determination is made by checking the filesystem for the users information.
653:
654: Inputs: $author
655:
656: Returns: 0 - this is not the authors home server, 1 - this is.
657:
658: =cut
659:
660: ########################################################
661: ########################################################
1.34 harris41 662: sub ishome {
663: my $author=shift;
664: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
665: my ($udom,$uname)=split(/\//,$author);
666: my $proname=propath($udom,$uname);
667: if (-e $proname) {
668: return 1;
669: } else {
670: return 0;
671: }
672: }
673:
1.51 matthew 674: ########################################################
675: ########################################################
676:
677: =pod
678:
679: =item &propath
680:
681: Inputs: user name, user domain
682:
683: Returns: The full path to the users directory.
684:
685: =cut
686:
687: ########################################################
688: ########################################################
1.34 harris41 689: sub propath {
690: my ($udom,$uname)=@_;
691: $udom=~s/\W//g;
692: $uname=~s/\W//g;
693: my $subdir=$uname.'__';
694: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
695: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
696: return $proname;
697: }
1.40 harris41 698:
1.51 matthew 699: ########################################################
700: ########################################################
701:
702: =pod
703:
704: =item &courselog
705:
706: Inputs: $path, $command
707:
708: Returns: unescaped string of values.
709:
710: =cut
711:
712: ########################################################
713: ########################################################
714: sub courselog {
715: my ($path,$command)=@_;
716: my %filters=();
717: foreach (split(/\:/,&unescape($command))) {
718: my ($name,$value)=split(/\=/,$_);
719: $filters{$name}=$value;
720: }
721: my @results=();
722: open(IN,$path.'/activity.log') or return ('file_error');
723: while (my $line=<IN>) {
724: chomp($line);
725: my ($timestamp,$host,$log)=split(/\:/,$line);
726: #
727: # $log has the actual log entries; currently still escaped, and
728: # %26(timestamp)%3a(url)%3a(user)%3a(domain)
729: # then additionally
730: # %3aPOST%3a(name)%3d(value)%3a(name)%3d(value)
731: # or
732: # %3aCSTORE%3a(name)%3d(value)%26(name)%3d(value)
733: #
734: # get delimiter between timestamped entries to be &&&
735: $log=~s/\%26(\d+)\%3a/\&\&\&$1\%3a/g;
736: # now go over all log entries
737: foreach (split(/\&\&\&/,&unescape($log))) {
738: my ($time,$res,$uname,$udom,$action,@values)=split(/\:/,$_);
739: my $values=&unescape(join(':',@values));
740: $values=~s/\&/\:/g;
741: $res=&unescape($res);
742: my $include=1;
743: if (($filters{'username'}) && ($uname ne $filters{'username'}))
744: { $include=0; }
745: if (($filters{'domain'}) && ($udom ne $filters{'domain'}))
746: { $include=0; }
747: if (($filters{'url'}) && ($res!~/$filters{'url'}/))
748: { $include=0; }
749: if (($filters{'start'}) && ($time<$filters{'start'}))
750: { $include=0; }
751: if (($filters{'end'}) && ($time>$filters{'end'}))
752: { $include=0; }
753: if (($filters{'action'} eq 'view') && ($action))
754: { $include=0; }
755: if (($filters{'action'} eq 'submit') && ($action ne 'POST'))
756: { $include=0; }
757: if (($filters{'action'} eq 'grade') && ($action ne 'CSTORE'))
758: { $include=0; }
759: if ($include) {
760: push(@results,($time<1000000000?'0':'').$time.':'.$res.':'.
761: $uname.':'.$udom.':'.
762: $action.':'.$values);
763: }
764: }
765: }
766: close IN;
767: return join('&',sort(@results));
768: }
769:
770: ########################################################
771: ########################################################
772:
773: =pod
774:
775: =item &userlog
776:
777: Inputs: $path, $command
778:
779: Returns: unescaped string of values.
1.40 harris41 780:
1.51 matthew 781: =cut
1.40 harris41 782:
1.51 matthew 783: ########################################################
784: ########################################################
785: sub userlog {
786: my ($path,$command)=@_;
787: my %filters=();
788: foreach (split(/\:/,&unescape($command))) {
789: my ($name,$value)=split(/\=/,$_);
790: $filters{$name}=$value;
791: }
792: my @results=();
793: open(IN,$path.'/activity.log') or return ('file_error');
794: while (my $line=<IN>) {
795: chomp($line);
796: my ($timestamp,$host,$log)=split(/\:/,$line);
797: $log=&unescape($log);
798: my $include=1;
799: if (($filters{'start'}) && ($timestamp<$filters{'start'}))
800: { $include=0; }
801: if (($filters{'end'}) && ($timestamp>$filters{'end'}))
802: { $include=0; }
803: if (($filters{'action'} eq 'log') && ($log!~/^Log/)) { $include=0; }
804: if (($filters{'action'} eq 'check') && ($log!~/^Check/))
805: { $include=0; }
806: if ($include) {
807: push(@results,$timestamp.':'.$log);
808: }
809: }
810: close IN;
811: return join('&',sort(@results));
1.52 ! matthew 812: }
! 813:
! 814: ########################################################
! 815: ########################################################
! 816:
! 817: =pod
! 818:
! 819: =item Functions required for forking
! 820:
! 821: =over 4
! 822:
! 823: =item REAPER
! 824:
! 825: REAPER takes care of dead children.
! 826:
! 827: =item HUNTSMAN
! 828:
! 829: Signal handler for SIGINT.
! 830:
! 831: =item HUPSMAN
! 832:
! 833: Signal handler for SIGHUP
! 834:
! 835: =item DISCONNECT
! 836:
! 837: Disconnects from database.
! 838:
! 839: =back
! 840:
! 841: =cut
! 842:
! 843: ########################################################
! 844: ########################################################
! 845: sub REAPER { # takes care of dead children
! 846: $SIG{CHLD} = \&REAPER;
! 847: my $pid = wait;
! 848: $children --;
! 849: &logthis("Child $pid died");
! 850: delete $children{$pid};
! 851: }
! 852:
! 853: sub HUNTSMAN { # signal handler for SIGINT
! 854: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
! 855: kill 'INT' => keys %children;
! 856: my $execdir=$perlvar{'lonDaemons'};
! 857: unlink("$execdir/logs/lonsql.pid");
! 858: &logthis("<font color=red>CRITICAL: Shutting down</font>");
! 859: $unixsock = "mysqlsock";
! 860: my $port="$perlvar{'lonSockDir'}/$unixsock";
! 861: unlink($port);
! 862: exit; # clean up with dignity
! 863: }
! 864:
! 865: sub HUPSMAN { # signal handler for SIGHUP
! 866: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
! 867: kill 'INT' => keys %children;
! 868: close($server); # free up socket
! 869: &logthis("<font color=red>CRITICAL: Restarting</font>");
! 870: my $execdir=$perlvar{'lonDaemons'};
! 871: $unixsock = "mysqlsock";
! 872: my $port="$perlvar{'lonSockDir'}/$unixsock";
! 873: unlink($port);
! 874: exec("$execdir/lonsql"); # here we go again
! 875: }
! 876:
! 877: sub DISCONNECT {
! 878: $dbh->disconnect or
! 879: &logthis("<font color=blue>WARNING: Couldn't disconnect from database ".
! 880: " $DBI::errstr : $@</font>");
! 881: exit;
1.51 matthew 882: }
1.40 harris41 883:
884:
885:
886:
887:
888:
889:
890:
891:
892:
893:
1.51 matthew 894: # ----------------------------------- POD (plain old documentation, CPAN style)
1.40 harris41 895:
1.51 matthew 896: =pod
1.40 harris41 897:
1.51 matthew 898: =back
1.40 harris41 899:
900: =cut
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