Annotation of loncom/lonsql, revision 1.55
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: #
1.55 ! albertel 6: # $Id: lonsql,v 1.54 2003/02/03 05:08:06 harris41 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:
1.55 ! albertel 44: lonsql is
1.51 matthew 45:
46: =head1 Internals
47:
48: =over 4
49:
50: =cut
51:
52: use strict;
1.36 www 53:
1.42 harris41 54: use lib '/home/httpd/lib/perl/';
55: use LONCAPA::Configuration;
56:
1.2 harris41 57: use IO::Socket;
58: use Symbol;
1.1 harris41 59: use POSIX;
60: use IO::Select;
61: use IO::File;
62: use Socket;
63: use Fcntl;
64: use Tie::RefHash;
65: use DBI;
1.51 matthew 66: use File::Find;
67:
68: ########################################################
69: ########################################################
70:
71: =pod
72:
73: =item Global Variables
74:
75: =over 4
76:
77: =item dbh
78:
79: =back
80:
81: =cut
82:
83: ########################################################
84: ########################################################
85: my $dbh;
86:
87: ########################################################
88: ########################################################
89:
90: =pod
91:
92: =item Variables required for forking
1.1 harris41 93:
1.51 matthew 94: =over 4
95:
96: =item $MAX_CLIENTS_PER_CHILD
97:
98: The number of clients each child should process.
99:
100: =item %children
101:
102: The keys to %children are the current child process IDs
103:
104: =item $children
105:
106: The current number of children
107:
108: =back
109:
110: =cut
1.9 harris41 111:
1.51 matthew 112: ########################################################
113: ########################################################
114: my $MAX_CLIENTS_PER_CHILD = 5; # number of clients each child should process
115: my %children = (); # keys are current child process IDs
116: my $children = 0; # current number of children
117:
118: ###################################################################
119: ###################################################################
120:
121: =pod
122:
123: =item Main body of code.
124:
125: =over 4
1.45 www 126:
1.51 matthew 127: =item Read data from loncapa_apache.conf and loncapa.conf.
128:
129: =item Ensure we can access the database.
130:
131: =item Determine if there are other instances of lonsql running.
132:
133: =item Read the hosts file.
134:
135: =item Create a socket for lonsql.
136:
137: =item Fork once and dissociate from parent.
138:
139: =item Write PID to disk.
140:
141: =item Prefork children and maintain the population of children.
142:
143: =back
144:
145: =cut
146:
147: ###################################################################
148: ###################################################################
149: my $childmaxattempts=10;
150: my $run =0; # running counter to generate the query-id
151: #
152: # Read loncapa_apache.conf and loncapa.conf
153: #
1.53 harris41 154: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.51 matthew 155: my %perlvar=%{$perlvarref};
156: #
157: # Make sure that database can be accessed
158: #
159: my $dbh;
160: unless ($dbh = DBI->connect("DBI:mysql:loncapa","www",
161: $perlvar{'lonSqlAccess'},
162: { RaiseError =>0,PrintError=>0})) {
163: print "Cannot connect to database!\n";
164: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
165: my $subj="LON: $perlvar{'lonHostID'} Cannot connect to database!";
166: system("echo 'Cannot connect to MySQL database!' |".
167: " mailto $emailto -s '$subj' > /dev/null");
168: exit 1;
169: } else {
170: $dbh->disconnect;
171: }
1.52 matthew 172:
1.51 matthew 173: #
174: # Check if other instance running
175: #
176: my $pidfile="$perlvar{'lonDaemons'}/logs/lonsql.pid";
177: if (-e $pidfile) {
178: my $lfh=IO::File->new("$pidfile");
179: my $pide=<$lfh>;
180: chomp($pide);
181: if (kill 0 => $pide) { die "already running"; }
182: }
1.52 matthew 183:
1.49 www 184: #
1.51 matthew 185: # Read hosts file
1.49 www 186: #
1.51 matthew 187: my %hostip;
188: my $thisserver;
189: my $PREFORK=4; # number of children to maintain, at least four spare
190: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
191: while (my $configline=<CONFIG>) {
192: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
193: chomp($ip);
194: $hostip{$ip}=$id;
195: $thisserver=$name if ($id eq $perlvar{'lonHostID'});
196: $PREFORK++;
1.45 www 197: }
1.51 matthew 198: close(CONFIG);
199: #
200: $PREFORK=int($PREFORK/4);
1.52 matthew 201:
1.51 matthew 202: #
203: # Create a socket to talk to lond
204: #
205: my $unixsock = "mysqlsock";
206: my $localfile="$perlvar{'lonSockDir'}/$unixsock";
207: my $server;
208: unlink ($localfile);
209: unless ($server=IO::Socket::UNIX->new(Local =>"$localfile",
210: Type => SOCK_STREAM,
211: Listen => 10)) {
212: print "in socket error:$@\n";
1.45 www 213: }
1.52 matthew 214:
1.51 matthew 215: #
216: # Fork once and dissociate
1.52 matthew 217: #
1.51 matthew 218: my $fpid=fork;
1.1 harris41 219: exit if $fpid;
220: die "Couldn't fork: $!" unless defined ($fpid);
221: POSIX::setsid() or die "Can't start new session: $!";
1.52 matthew 222:
1.51 matthew 223: #
224: # Write our PID on disk
225: my $execdir=$perlvar{'lonDaemons'};
1.1 harris41 226: open (PIDSAVE,">$execdir/logs/lonsql.pid");
227: print PIDSAVE "$$\n";
228: close(PIDSAVE);
229: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.52 matthew 230:
1.51 matthew 231: #
232: # Ignore signals generated during initial startup
1.1 harris41 233: $SIG{HUP}=$SIG{USR1}='IGNORE';
1.51 matthew 234: # Now we are on our own
235: # Fork off our children.
1.2 harris41 236: for (1 .. $PREFORK) {
237: make_new_child();
1.1 harris41 238: }
1.52 matthew 239:
1.51 matthew 240: #
1.2 harris41 241: # Install signal handlers.
1.1 harris41 242: $SIG{CHLD} = \&REAPER;
243: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
244: $SIG{HUP} = \&HUPSMAN;
1.52 matthew 245:
1.51 matthew 246: #
1.1 harris41 247: # And maintain the population.
248: while (1) {
249: sleep; # wait for a signal (i.e., child's death)
1.51 matthew 250: for (my $i = $children; $i < $PREFORK; $i++) {
1.2 harris41 251: make_new_child(); # top up the child pool
1.1 harris41 252: }
253: }
254:
1.51 matthew 255: ########################################################
256: ########################################################
257:
258: =pod
259:
260: =item &make_new_child
261:
262: Inputs: None
263:
264: Returns: None
265:
266: =cut
1.2 harris41 267:
1.51 matthew 268: ########################################################
269: ########################################################
1.1 harris41 270: sub make_new_child {
271: my $pid;
272: my $sigset;
1.51 matthew 273: #
1.1 harris41 274: # block signal for fork
275: $sigset = POSIX::SigSet->new(SIGINT);
276: sigprocmask(SIG_BLOCK, $sigset)
277: or die "Can't block SIGINT for fork: $!\n";
1.51 matthew 278: #
1.2 harris41 279: die "fork: $!" unless defined ($pid = fork);
1.51 matthew 280: #
1.1 harris41 281: if ($pid) {
282: # Parent records the child's birth and returns.
283: sigprocmask(SIG_UNBLOCK, $sigset)
284: or die "Can't unblock SIGINT for fork: $!\n";
285: $children{$pid} = 1;
286: $children++;
287: return;
288: } else {
1.2 harris41 289: # Child can *not* return from this subroutine.
1.1 harris41 290: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
291: # unblock signals
292: sigprocmask(SIG_UNBLOCK, $sigset)
293: or die "Can't unblock SIGINT for fork: $!\n";
1.2 harris41 294: #open database handle
295: # making dbh global to avoid garbage collector
1.51 matthew 296: unless ($dbh = DBI->connect("DBI:mysql:loncapa","www",
297: $perlvar{'lonSqlAccess'},
298: { RaiseError =>0,PrintError=>0})) {
299: sleep(10+int(rand(20)));
300: &logthis("<font color=blue>WARNING: Couldn't connect to database".
301: ": $@</font>");
302: # "($st secs): $@</font>");
303: print "database handle error\n";
304: exit;
305: }
306: # make sure that a database disconnection occurs with
307: # ending kill signals
1.2 harris41 308: $SIG{TERM}=$SIG{INT}=$SIG{QUIT}=$SIG{__DIE__}=\&DISCONNECT;
1.1 harris41 309: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
1.51 matthew 310: for (my $i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
311: my $client = $server->accept() or last;
1.2 harris41 312: # do something with the connection
1.1 harris41 313: $run = $run+1;
1.2 harris41 314: my $userinput = <$client>;
315: chomp($userinput);
1.51 matthew 316: #
1.45 www 317: my ($conserver,$query,
318: $arg1,$arg2,$arg3)=split(/&/,$userinput);
319: my $query=unescape($query);
1.51 matthew 320: #
1.2 harris41 321: #send query id which is pid_unixdatetime_runningcounter
1.51 matthew 322: my $queryid = $thisserver;
1.2 harris41 323: $queryid .="_".($$)."_";
324: $queryid .= time."_";
325: $queryid .= $run;
326: print $client "$queryid\n";
1.51 matthew 327: #
1.47 www 328: &logthis("QUERY: $query - $arg1 - $arg2 - $arg3");
1.25 harris41 329: sleep 1;
1.51 matthew 330: #
1.45 www 331: my $result='';
1.51 matthew 332: #
333: # At this point, query is received, query-ID assigned and sent
334: # back, $query eq 'logquery' will mean that this is a query
335: # against log-files
336: if (($query eq 'userlog') || ($query eq 'courselog')) {
337: # beginning of log query
338: my $udom = &unescape($arg1);
339: my $uname = &unescape($arg2);
340: my $command = &unescape($arg3);
341: my $path = &propath($udom,$uname);
342: if (-e "$path/activity.log") {
343: if ($query eq 'userlog') {
344: $result=&userlog($path,$command);
345: } else {
346: $result=&courselog($path,$command);
347: }
348: } else {
349: &logthis('Unable to do log query: '.$uname.'@'.$udom);
350: $result='no_such_file';
351: }
352: # end of log query
353: } else {
354: # Do an sql query
355: $result = &do_sql_query($query,$arg1,$arg2);
356: }
1.50 matthew 357: # result does not need to be escaped because it has already been
358: # escaped.
359: #$result=&escape($result);
1.51 matthew 360: # reply with result, append \n unless already there
1.44 www 361: $result.="\n" unless ($result=~/\n$/);
1.17 harris41 362: &reply("queryreply:$queryid:$result",$conserver);
1.1 harris41 363: }
364: # tidy up gracefully and finish
1.51 matthew 365: #
366: # close the database handle
1.2 harris41 367: $dbh->disconnect
1.51 matthew 368: or &logthis("<font color=blue>WARNING: Couldn't disconnect".
369: " from database $DBI::errstr : $@</font>");
1.1 harris41 370: # this exit is VERY important, otherwise the child will become
371: # a producer of more and more children, forking yourself into
372: # process death.
373: exit;
374: }
1.2 harris41 375: }
1.1 harris41 376:
1.51 matthew 377: ########################################################
378: ########################################################
379:
380: =pod
381:
382: =item &do_sql_query
383:
384: Runs an sql metadata table query.
385:
386: Inputs: $query, $custom, $customshow
387:
388: Returns: A string containing escaped results.
389:
390: =cut
391:
392: ########################################################
393: ########################################################
394: {
395: my @metalist;
396:
397: sub process_file {
398: if ( -e $_ && # file exists
399: -f $_ && # and is a normal file
400: /\.meta$/ && # ends in meta
401: ! /^.+\.\d+\.[^\.]+\.meta$/ # is not a previous version
402: ) {
403: push(@metalist,$File::Find::name);
404: }
405: }
406:
407: sub do_sql_query {
408: my ($query,$custom,$customshow) = @_;
409: $custom = &unescape($custom);
410: $customshow = &unescape($customshow);
411: #
412: @metalist = ();
413: #
414: my $result = '';
415: my @results = ();
416: my @files;
417: my $subsetflag=0;
418: #
419: if ($query) {
420: #prepare and execute the query
421: my $sth = $dbh->prepare($query);
422: unless ($sth->execute()) {
423: &logthis("<font color=blue>WARNING: ".
424: "Could not retrieve from database: $@</font>");
425: } else {
426: my $aref=$sth->fetchall_arrayref;
427: foreach my $row (@$aref) {
428: push @files,@{$row}[3] if ($custom or $customshow);
429: my @b=map { &escape($_); } @$row;
430: push @results,join(",", @b);
431: # Build up the @files array with the LON-CAPA urls
432: # of the resources.
433: }
434: }
435: }
436: # do custom metadata searching here and build into result
437: return join("&",@results) if (! ($custom or $customshow));
438: # Only get here if there is a custom query or custom show request
439: &logthis("Doing custom query for $custom");
440: if ($query) {
441: @metalist=map {
442: $perlvar{'lonDocRoot'}.$_.'.meta';
443: } @files;
444: } else {
445: my $dir = "$perlvar{'lonDocRoot'}/res/$perlvar{'lonDefDomain'}";
446: @metalist=();
447: opendir(RESOURCES,$dir);
448: my @homeusers=grep {
449: &ishome($dir.'/'.$_);
450: } grep {!/^\.\.?$/} readdir(RESOURCES);
451: closedir RESOURCES;
452: # Define the
453: foreach my $user (@homeusers) {
454: find (\&process_file,$dir.'/'.$user);
455: }
456: }
457: # if file is indicated in sql database and
458: # not part of sql-relevant query, do not pattern match.
459: #
460: # if file is not in sql database, output error.
461: #
462: # if file is indicated in sql database and is
463: # part of query result list, then do the pattern match.
464: my $customresult='';
465: my @results;
466: foreach my $metafile (@metalist) {
467: my $fh=IO::File->new($metafile);
468: my @lines=<$fh>;
469: my $stuff=join('',@lines);
470: if ($stuff=~/$custom/s) {
471: foreach my $f ('abstract','author','copyright',
472: 'creationdate','keywords','language',
473: 'lastrevisiondate','mime','notes',
474: 'owner','subject','title') {
475: $stuff=~s/\n?\<$f[^\>]*\>.*?<\/$f[^\>]*\>\n?//s;
476: }
477: my $mfile=$metafile;
478: my $docroot=$perlvar{'lonDocRoot'};
479: $mfile=~s/^$docroot//;
480: $mfile=~s/\.meta$//;
481: unless ($query) {
482: my $q2="SELECT * FROM metadata WHERE url ".
483: " LIKE BINARY '?'";
484: my $sth = $dbh->prepare($q2);
485: $sth->execute($mfile);
486: my $aref=$sth->fetchall_arrayref;
487: foreach my $a (@$aref) {
488: my @b=map { &escape($_)} @$a;
489: push @results,join(",", @b);
490: }
491: }
492: # &logthis("found: $stuff");
493: $customresult.='&custom='.&escape($mfile).','.
494: escape($stuff);
495: }
496: }
497: $result=join("&",@results) unless $query;
498: $result.=$customresult;
499: #
500: return $result;
501: } # End of &do_sql_query
502:
503: } # End of scoping curly braces for &process_file and &do_sql_query
504: ########################################################
505: ########################################################
506:
507: =pod
508:
509: =item &logthis
510:
511: Inputs: $message, the message to log
512:
513: Returns: nothing
514:
515: Writes $message to the logfile.
516:
517: =cut
518:
519: ########################################################
520: ########################################################
521: sub logthis {
522: my $message=shift;
523: my $execdir=$perlvar{'lonDaemons'};
1.52 matthew 524: my $fh=IO::File->new(">>$execdir/logs/lonsql.log");
1.51 matthew 525: my $now=time;
526: my $local=localtime($now);
527: print $fh "$local ($$): $message\n";
1.2 harris41 528: }
1.1 harris41 529:
1.2 harris41 530: # -------------------------------------------------- Non-critical communication
1.1 harris41 531:
1.51 matthew 532: ########################################################
533: ########################################################
534:
535: =pod
536:
537: =item &subreply
538:
539: Sends a command to a server. Called only by &reply.
540:
541: Inputs: $cmd,$server
542:
543: Returns: The results of the message or 'con_lost' on error.
544:
545: =cut
546:
547: ########################################################
548: ########################################################
1.2 harris41 549: sub subreply {
550: my ($cmd,$server)=@_;
551: my $peerfile="$perlvar{'lonSockDir'}/$server";
552: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
553: Type => SOCK_STREAM,
554: Timeout => 10)
555: or return "con_lost";
556: print $sclient "$cmd\n";
557: my $answer=<$sclient>;
558: chomp($answer);
1.51 matthew 559: $answer="con_lost" if (!$answer);
1.2 harris41 560: return $answer;
561: }
1.1 harris41 562:
1.51 matthew 563: ########################################################
564: ########################################################
565:
566: =pod
567:
568: =item &reply
569:
570: Sends a command to a server.
571:
572: Inputs: $cmd,$server
573:
574: Returns: The results of the message or 'con_lost' on error.
575:
576: =cut
577:
578: ########################################################
579: ########################################################
1.2 harris41 580: sub reply {
581: my ($cmd,$server)=@_;
582: my $answer;
583: if ($server ne $perlvar{'lonHostID'}) {
584: $answer=subreply($cmd,$server);
585: if ($answer eq 'con_lost') {
586: $answer=subreply("ping",$server);
587: $answer=subreply($cmd,$server);
588: }
589: } else {
590: $answer='self_reply';
1.33 harris41 591: $answer=subreply($cmd,$server);
1.2 harris41 592: }
593: return $answer;
594: }
1.1 harris41 595:
1.51 matthew 596: ########################################################
597: ########################################################
598:
599: =pod
600:
601: =item &escape
602:
603: Escape special characters in a string.
1.3 harris41 604:
1.51 matthew 605: Inputs: string to escape
606:
607: Returns: The input string with special characters escaped.
608:
609: =cut
610:
611: ########################################################
612: ########################################################
1.3 harris41 613: sub escape {
614: my $str=shift;
615: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
616: return $str;
617: }
618:
1.51 matthew 619: ########################################################
620: ########################################################
621:
622: =pod
623:
624: =item &unescape
625:
626: Unescape special characters in a string.
1.3 harris41 627:
1.51 matthew 628: Inputs: string to unescape
629:
630: Returns: The input string with special characters unescaped.
631:
632: =cut
633:
634: ########################################################
635: ########################################################
1.3 harris41 636: sub unescape {
637: my $str=shift;
638: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
639: return $str;
640: }
1.34 harris41 641:
1.51 matthew 642: ########################################################
643: ########################################################
644:
645: =pod
646:
647: =item &ishome
648:
649: Determine if the current machine is the home server for a user.
650: The determination is made by checking the filesystem for the users information.
651:
652: Inputs: $author
653:
654: Returns: 0 - this is not the authors home server, 1 - this is.
655:
656: =cut
657:
658: ########################################################
659: ########################################################
1.34 harris41 660: sub ishome {
661: my $author=shift;
662: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
663: my ($udom,$uname)=split(/\//,$author);
664: my $proname=propath($udom,$uname);
665: if (-e $proname) {
666: return 1;
667: } else {
668: return 0;
669: }
670: }
671:
1.51 matthew 672: ########################################################
673: ########################################################
674:
675: =pod
676:
677: =item &propath
678:
679: Inputs: user name, user domain
680:
681: Returns: The full path to the users directory.
682:
683: =cut
684:
685: ########################################################
686: ########################################################
1.34 harris41 687: sub propath {
688: my ($udom,$uname)=@_;
689: $udom=~s/\W//g;
690: $uname=~s/\W//g;
691: my $subdir=$uname.'__';
692: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
693: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
694: return $proname;
695: }
1.40 harris41 696:
1.51 matthew 697: ########################################################
698: ########################################################
699:
700: =pod
701:
702: =item &courselog
703:
704: Inputs: $path, $command
705:
706: Returns: unescaped string of values.
707:
708: =cut
709:
710: ########################################################
711: ########################################################
712: sub courselog {
713: my ($path,$command)=@_;
714: my %filters=();
715: foreach (split(/\:/,&unescape($command))) {
716: my ($name,$value)=split(/\=/,$_);
717: $filters{$name}=$value;
718: }
719: my @results=();
720: open(IN,$path.'/activity.log') or return ('file_error');
721: while (my $line=<IN>) {
722: chomp($line);
723: my ($timestamp,$host,$log)=split(/\:/,$line);
724: #
725: # $log has the actual log entries; currently still escaped, and
726: # %26(timestamp)%3a(url)%3a(user)%3a(domain)
727: # then additionally
728: # %3aPOST%3a(name)%3d(value)%3a(name)%3d(value)
729: # or
730: # %3aCSTORE%3a(name)%3d(value)%26(name)%3d(value)
731: #
732: # get delimiter between timestamped entries to be &&&
733: $log=~s/\%26(\d+)\%3a/\&\&\&$1\%3a/g;
734: # now go over all log entries
735: foreach (split(/\&\&\&/,&unescape($log))) {
736: my ($time,$res,$uname,$udom,$action,@values)=split(/\:/,$_);
737: my $values=&unescape(join(':',@values));
738: $values=~s/\&/\:/g;
739: $res=&unescape($res);
740: my $include=1;
741: if (($filters{'username'}) && ($uname ne $filters{'username'}))
742: { $include=0; }
743: if (($filters{'domain'}) && ($udom ne $filters{'domain'}))
744: { $include=0; }
745: if (($filters{'url'}) && ($res!~/$filters{'url'}/))
746: { $include=0; }
747: if (($filters{'start'}) && ($time<$filters{'start'}))
748: { $include=0; }
749: if (($filters{'end'}) && ($time>$filters{'end'}))
750: { $include=0; }
751: if (($filters{'action'} eq 'view') && ($action))
752: { $include=0; }
753: if (($filters{'action'} eq 'submit') && ($action ne 'POST'))
754: { $include=0; }
755: if (($filters{'action'} eq 'grade') && ($action ne 'CSTORE'))
756: { $include=0; }
757: if ($include) {
758: push(@results,($time<1000000000?'0':'').$time.':'.$res.':'.
759: $uname.':'.$udom.':'.
760: $action.':'.$values);
761: }
762: }
763: }
764: close IN;
765: return join('&',sort(@results));
766: }
767:
768: ########################################################
769: ########################################################
770:
771: =pod
772:
773: =item &userlog
774:
775: Inputs: $path, $command
776:
777: Returns: unescaped string of values.
1.40 harris41 778:
1.51 matthew 779: =cut
1.40 harris41 780:
1.51 matthew 781: ########################################################
782: ########################################################
783: sub userlog {
784: my ($path,$command)=@_;
785: my %filters=();
786: foreach (split(/\:/,&unescape($command))) {
787: my ($name,$value)=split(/\=/,$_);
788: $filters{$name}=$value;
789: }
790: my @results=();
791: open(IN,$path.'/activity.log') or return ('file_error');
792: while (my $line=<IN>) {
793: chomp($line);
794: my ($timestamp,$host,$log)=split(/\:/,$line);
795: $log=&unescape($log);
796: my $include=1;
797: if (($filters{'start'}) && ($timestamp<$filters{'start'}))
798: { $include=0; }
799: if (($filters{'end'}) && ($timestamp>$filters{'end'}))
800: { $include=0; }
801: if (($filters{'action'} eq 'log') && ($log!~/^Log/)) { $include=0; }
802: if (($filters{'action'} eq 'check') && ($log!~/^Check/))
803: { $include=0; }
804: if ($include) {
805: push(@results,$timestamp.':'.$log);
806: }
807: }
808: close IN;
809: return join('&',sort(@results));
1.52 matthew 810: }
811:
812: ########################################################
813: ########################################################
814:
815: =pod
816:
817: =item Functions required for forking
818:
819: =over 4
820:
821: =item REAPER
822:
823: REAPER takes care of dead children.
824:
825: =item HUNTSMAN
826:
827: Signal handler for SIGINT.
828:
829: =item HUPSMAN
830:
831: Signal handler for SIGHUP
832:
833: =item DISCONNECT
834:
835: Disconnects from database.
836:
837: =back
838:
839: =cut
840:
841: ########################################################
842: ########################################################
843: sub REAPER { # takes care of dead children
844: $SIG{CHLD} = \&REAPER;
845: my $pid = wait;
846: $children --;
847: &logthis("Child $pid died");
848: delete $children{$pid};
849: }
850:
851: sub HUNTSMAN { # signal handler for SIGINT
852: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
853: kill 'INT' => keys %children;
854: my $execdir=$perlvar{'lonDaemons'};
855: unlink("$execdir/logs/lonsql.pid");
856: &logthis("<font color=red>CRITICAL: Shutting down</font>");
857: $unixsock = "mysqlsock";
858: my $port="$perlvar{'lonSockDir'}/$unixsock";
859: unlink($port);
860: exit; # clean up with dignity
861: }
862:
863: sub HUPSMAN { # signal handler for SIGHUP
864: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
865: kill 'INT' => keys %children;
866: close($server); # free up socket
867: &logthis("<font color=red>CRITICAL: Restarting</font>");
868: my $execdir=$perlvar{'lonDaemons'};
869: $unixsock = "mysqlsock";
870: my $port="$perlvar{'lonSockDir'}/$unixsock";
871: unlink($port);
872: exec("$execdir/lonsql"); # here we go again
873: }
874:
875: sub DISCONNECT {
876: $dbh->disconnect or
877: &logthis("<font color=blue>WARNING: Couldn't disconnect from database ".
878: " $DBI::errstr : $@</font>");
879: exit;
1.51 matthew 880: }
1.40 harris41 881:
882:
883:
884:
885:
886:
887:
888:
889:
890:
891:
1.51 matthew 892: # ----------------------------------- POD (plain old documentation, CPAN style)
1.40 harris41 893:
1.51 matthew 894: =pod
1.40 harris41 895:
1.51 matthew 896: =back
1.40 harris41 897:
898: =cut
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