loncom/lonsql - view

File: [LON-CAPA] / loncom / lonsql
Revision 1.61: download - view: text, annotated - select for diffs
Thu May 20 14:15:29 2004 UTC (19 years, 11 months ago) by matthew
Branches: MAIN
CVS tags: version_1_1_99_0, HEAD

Bug 3026: Remove logging spew.

1: #!/usr/bin/perl 2: 3: # The LearningOnline Network 4: # lonsql - LON TCP-MySQL-Server Daemon for handling database requests. 5: # 6: # $Id: lonsql,v 1.61 2004/05/20 14:15:29 matthew Exp $ 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: # 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 OVERVIEW 43: 44: =head2 Purpose within LON-CAPA 45: 46: LON-CAPA is meant to distribute A LOT of educational content to A LOT 47: of people. It is ineffective to directly rely on contents within the 48: ext2 filesystem to be speedily scanned for on-the-fly searches of 49: content descriptions. (Simply put, it takes a cumbersome amount of 50: time to open, read, analyze, and close thousands of files.) 51: 52: The solution is to index various data fields that are descriptive of 53: the educational resources on a LON-CAPA server machine in a 54: database. Descriptive data fields are referred to as "metadata". The 55: question then arises as to how this metadata is handled in terms of 56: the rest of the LON-CAPA network without burdening client and daemon 57: processes. 58: 59: The obvious solution, using lonc to send a query to a lond process, 60: doesn't work so well in general as you can see in the following 61: example: 62: 63: lonc= loncapa client process A-lonc= a lonc process on Server A 64: lond= loncapa daemon process 65: 66: database command 67: A-lonc --------TCP/IP----------------> B-lond 68: 69: The problem emerges that A-lonc and B-lond are kept waiting for the 70: MySQL server to "do its stuff", or in other words, perform the 71: conceivably sophisticated, data-intensive, time-sucking database 72: transaction. By tying up a lonc and lond process, this significantly 73: cripples the capabilities of LON-CAPA servers. 74: 75: The solution is to offload the work onto another process, and use 76: lonc and lond just for requests and notifications of completed 77: processing: 78: 79: database command 80: 81: A-lonc ---------TCP/IP-----------------> B-lond =====> B-lonsql 82: <---------------------------------/ | 83: "ok, I'll get back to you..." | 84: | 85: / 86: A-lond <------------------------------- B-lonc <====== 87: "Guess what? I have the result!" 88: 89: Of course, depending on success or failure, the messages may vary, but 90: the principle remains the same where a separate pool of children 91: processes (lonsql's) handle the MySQL database manipulations. 92: 93: Thus, lonc and lond spend effectively no time waiting on results from 94: the database. 95: 96: =head1 Internals 97: 98: =over 4 99: 100: =cut 101: 102: use strict; 103: 104: use lib '/home/httpd/lib/perl/'; 105: use LONCAPA::Configuration; 106: use LONCAPA::lonmetadata(); 107: 108: use IO::Socket; 109: use Symbol; 110: use POSIX; 111: use IO::Select; 112: use IO::File; 113: use Socket; 114: use Fcntl; 115: use Tie::RefHash; 116: use DBI; 117: use File::Find; 118: 119: ######################################################## 120: ######################################################## 121: 122: =pod 123: 124: =item Global Variables 125: 126: =over 4 127: 128: =item dbh 129: 130: =back 131: 132: =cut 133: 134: ######################################################## 135: ######################################################## 136: my $dbh; 137: 138: ######################################################## 139: ######################################################## 140: 141: =pod 142: 143: =item Variables required for forking 144: 145: =over 4 146: 147: =item $MAX_CLIENTS_PER_CHILD 148: 149: The number of clients each child should process. 150: 151: =item %children 152: 153: The keys to %children are the current child process IDs 154: 155: =item $children 156: 157: The current number of children 158: 159: =back 160: 161: =cut 162: 163: ######################################################## 164: ######################################################## 165: my $MAX_CLIENTS_PER_CHILD = 5; # number of clients each child should process 166: my %children = (); # keys are current child process IDs 167: my $children = 0; # current number of children 168: 169: ################################################################### 170: ################################################################### 171: 172: =pod 173: 174: =item Main body of code. 175: 176: =over 4 177: 178: =item Read data from loncapa_apache.conf and loncapa.conf. 179: 180: =item Ensure we can access the database. 181: 182: =item Determine if there are other instances of lonsql running. 183: 184: =item Read the hosts file. 185: 186: =item Create a socket for lonsql. 187: 188: =item Fork once and dissociate from parent. 189: 190: =item Write PID to disk. 191: 192: =item Prefork children and maintain the population of children. 193: 194: =back 195: 196: =cut 197: 198: ################################################################### 199: ################################################################### 200: my $childmaxattempts=10; 201: my $run =0; # running counter to generate the query-id 202: # 203: # Read loncapa_apache.conf and loncapa.conf 204: # 205: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf'); 206: my %perlvar=%{$perlvarref}; 207: # 208: # Make sure that database can be accessed 209: # 210: my $dbh; 211: unless ($dbh = DBI->connect("DBI:mysql:loncapa","www", 212: $perlvar{'lonSqlAccess'}, 213: { RaiseError =>0,PrintError=>0})) { 214: print "Cannot connect to database!\n"; 215: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}"; 216: my $subj="LON: $perlvar{'lonHostID'} Cannot connect to database!"; 217: system("echo 'Cannot connect to MySQL database!' |". 218: " mailto $emailto -s '$subj' > /dev/null"); 219: 220: open(SMP,'>/home/httpd/html/lon-status/mysql.txt'); 221: print SMP 'time='.time.'&mysql=defunct'."\n"; 222: close(SMP); 223: 224: exit 1; 225: } else { 226: $dbh->disconnect; 227: } 228: 229: # 230: # Check if other instance running 231: # 232: my $pidfile="$perlvar{'lonDaemons'}/logs/lonsql.pid"; 233: if (-e $pidfile) { 234: my $lfh=IO::File->new("$pidfile"); 235: my $pide=<$lfh>; 236: chomp($pide); 237: if (kill 0 => $pide) { die "already running"; } 238: } 239: 240: # 241: # Read hosts file 242: # 243: my %hostip; 244: my $thisserver; 245: my $PREFORK=4; # number of children to maintain, at least four spare 246: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file"; 247: while (my $configline=<CONFIG>) { 248: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline); 249: chomp($ip); 250: $hostip{$ip}=$id; 251: $thisserver=$name if ($id eq $perlvar{'lonHostID'}); 252: $PREFORK++; 253: } 254: close(CONFIG); 255: # 256: $PREFORK=int($PREFORK/4); 257: 258: # 259: # Create a socket to talk to lond 260: # 261: my $unixsock = "mysqlsock"; 262: my $localfile="$perlvar{'lonSockDir'}/$unixsock"; 263: my $server; 264: unlink ($localfile); 265: unless ($server=IO::Socket::UNIX->new(Local =>"$localfile", 266: Type => SOCK_STREAM, 267: Listen => 10)) { 268: print "in socket error:$@\n"; 269: } 270: 271: # 272: # Fork once and dissociate 273: # 274: my $fpid=fork; 275: exit if $fpid; 276: die "Couldn't fork: $!" unless defined ($fpid); 277: POSIX::setsid() or die "Can't start new session: $!"; 278: 279: # 280: # Write our PID on disk 281: my $execdir=$perlvar{'lonDaemons'}; 282: open (PIDSAVE,">$execdir/logs/lonsql.pid"); 283: print PIDSAVE "$$\n"; 284: close(PIDSAVE); 285: &logthis("CRITICAL: ---------- Starting ----------"); 286: 287: # 288: # Ignore signals generated during initial startup 289: $SIG{HUP}=$SIG{USR1}='IGNORE'; 290: # Now we are on our own 291: # Fork off our children. 292: for (1 .. $PREFORK) { 293: make_new_child(); 294: } 295: 296: # 297: # Install signal handlers. 298: $SIG{CHLD} = \&REAPER; 299: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN; 300: $SIG{HUP} = \&HUPSMAN; 301: 302: # 303: # And maintain the population. 304: while (1) { 305: sleep; # wait for a signal (i.e., child's death) 306: for (my $i = $children; $i < $PREFORK; $i++) { 307: make_new_child(); # top up the child pool 308: } 309: } 310: 311: ######################################################## 312: ######################################################## 313: 314: =pod 315: 316: =item &make_new_child 317: 318: Inputs: None 319: 320: Returns: None 321: 322: =cut 323: 324: ######################################################## 325: ######################################################## 326: sub make_new_child { 327: my $pid; 328: my $sigset; 329: # 330: # block signal for fork 331: $sigset = POSIX::SigSet->new(SIGINT); 332: sigprocmask(SIG_BLOCK, $sigset) 333: or die "Can't block SIGINT for fork: $!\n"; 334: # 335: die "fork: $!" unless defined ($pid = fork); 336: # 337: if ($pid) { 338: # Parent records the child's birth and returns. 339: sigprocmask(SIG_UNBLOCK, $sigset) 340: or die "Can't unblock SIGINT for fork: $!\n"; 341: $children{$pid} = 1; 342: $children++; 343: return; 344: } else { 345: # Child can *not* return from this subroutine. 346: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before 347: # unblock signals 348: sigprocmask(SIG_UNBLOCK, $sigset) 349: or die "Can't unblock SIGINT for fork: $!\n"; 350: #open database handle 351: # making dbh global to avoid garbage collector 352: unless ($dbh = DBI->connect("DBI:mysql:loncapa","www", 353: $perlvar{'lonSqlAccess'}, 354: { RaiseError =>0,PrintError=>0})) { 355: sleep(10+int(rand(20))); 356: &logthis("WARNING: Couldn't connect to database". 357: ": $@"); 358: # "($st secs): $@"); 359: print "database handle error\n"; 360: exit; 361: } 362: # make sure that a database disconnection occurs with 363: # ending kill signals 364: $SIG{TERM}=$SIG{INT}=$SIG{QUIT}=$SIG{__DIE__}=\&DISCONNECT; 365: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD 366: for (my $i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) { 367: my $client = $server->accept() or last; 368: # do something with the connection 369: $run = $run+1; 370: my $userinput = <$client>; 371: chomp($userinput); 372: # 373: my ($conserver,$query, 374: $arg1,$arg2,$arg3)=split(/&/,$userinput); 375: my $query=unescape($query); 376: # 377: #send query id which is pid_unixdatetime_runningcounter 378: my $queryid = $thisserver; 379: $queryid .="_".($$)."_"; 380: $queryid .= time."_"; 381: $queryid .= $run; 382: print $client "$queryid\n"; 383: # 384: # &logthis("QUERY: $query - $arg1 - $arg2 - $arg3"); 385: sleep 1; 386: # 387: my $result=''; 388: # 389: # At this point, query is received, query-ID assigned and sent 390: # back, $query eq 'logquery' will mean that this is a query 391: # against log-files 392: if (($query eq 'userlog') || ($query eq 'courselog')) { 393: # beginning of log query 394: my $udom = &unescape($arg1); 395: my $uname = &unescape($arg2); 396: my $command = &unescape($arg3); 397: my $path = &propath($udom,$uname); 398: if (-e "$path/activity.log") { 399: if ($query eq 'userlog') { 400: $result=&userlog($path,$command); 401: } else { 402: $result=&courselog($path,$command); 403: } 404: } else { 405: &logthis('Unable to do log query: '.$uname.'@'.$udom); 406: $result='no_such_file'; 407: } 408: # end of log query 409: } else { 410: # Do an sql query 411: $result = &do_sql_query($query,$arg1,$arg2); 412: } 413: # result does not need to be escaped because it has already been 414: # escaped. 415: #$result=&escape($result); 416: &reply("queryreply:$queryid:$result",$conserver); 417: } 418: # tidy up gracefully and finish 419: # 420: # close the database handle 421: $dbh->disconnect 422: or &logthis("WARNING: Couldn't disconnect". 423: " from database $DBI::errstr : $@"); 424: # this exit is VERY important, otherwise the child will become 425: # a producer of more and more children, forking yourself into 426: # process death. 427: exit; 428: } 429: } 430: 431: ######################################################## 432: ######################################################## 433: 434: =pod 435: 436: =item &do_sql_query 437: 438: Runs an sql metadata table query. 439: 440: Inputs: $query, $custom, $customshow 441: 442: Returns: A string containing escaped results. 443: 444: =cut 445: 446: ######################################################## 447: ######################################################## 448: { 449: my @metalist; 450: 451: sub process_file { 452: if ( -e $_ && # file exists 453: -f $_ && # and is a normal file 454: /\.meta$/ && # ends in meta 455: ! /^.+\.\d+\.[^\.]+\.meta$/ # is not a previous version 456: ) { 457: push(@metalist,$File::Find::name); 458: } 459: } 460: 461: sub do_sql_query { 462: my ($query,$custom,$customshow) = @_; 463: $custom = &unescape($custom); 464: $customshow = &unescape($customshow); 465: # 466: @metalist = (); 467: # 468: my $result = ''; 469: my @results = (); 470: my @files; 471: my $subsetflag=0; 472: # 473: if ($query) { 474: #prepare and execute the query 475: my $sth = $dbh->prepare($query); 476: unless ($sth->execute()) { 477: &logthis(''. 478: 'WARNING: Could not retrieve from database:'. 479: $sth->errstr().''); 480: } else { 481: my $aref=$sth->fetchall_arrayref; 482: foreach my $row (@$aref) { 483: push @files,@{$row}[3] if ($custom or $customshow); 484: my @b=map { &escape($_); } @$row; 485: push @results,join(",", @b); 486: # Build up the @files array with the LON-CAPA urls 487: # of the resources. 488: } 489: } 490: } 491: # do custom metadata searching here and build into result 492: return join("&",@results) if (! ($custom or $customshow)); 493: # Only get here if there is a custom query or custom show request 494: &logthis("Doing custom query for $custom"); 495: if ($query) { 496: @metalist=map { 497: $perlvar{'lonDocRoot'}.$_.'.meta'; 498: } @files; 499: } else { 500: my $dir = "$perlvar{'lonDocRoot'}/res/$perlvar{'lonDefDomain'}"; 501: @metalist=(); 502: opendir(RESOURCES,$dir); 503: my @homeusers=grep { 504: &ishome($dir.'/'.$_); 505: } grep {!/^\.\.?$/} readdir(RESOURCES); 506: closedir RESOURCES; 507: # Define the 508: foreach my $user (@homeusers) { 509: find (\&process_file,$dir.'/'.$user); 510: } 511: } 512: # if file is indicated in sql database and 513: # not part of sql-relevant query, do not pattern match. 514: # 515: # if file is not in sql database, output error. 516: # 517: # if file is indicated in sql database and is 518: # part of query result list, then do the pattern match. 519: my $customresult=''; 520: my @results; 521: foreach my $metafile (@metalist) { 522: my $fh=IO::File->new($metafile); 523: my @lines=<$fh>; 524: my $stuff=join('',@lines); 525: if ($stuff=~/$custom/s) { 526: foreach my $f ('abstract','author','copyright', 527: 'creationdate','keywords','language', 528: 'lastrevisiondate','mime','notes', 529: 'owner','subject','title') { 530: $stuff=~s/\n?\<$f[^\>]*\>.*?<\/$f[^\>]*\>\n?//s; 531: } 532: my $mfile=$metafile; 533: my $docroot=$perlvar{'lonDocRoot'}; 534: $mfile=~s/^$docroot//; 535: $mfile=~s/\.meta$//; 536: unless ($query) { 537: my $q2="SELECT * FROM metadata WHERE url ". 538: " LIKE BINARY '?'"; 539: my $sth = $dbh->prepare($q2); 540: $sth->execute($mfile); 541: my $aref=$sth->fetchall_arrayref; 542: foreach my $a (@$aref) { 543: my @b=map { &escape($_)} @$a; 544: push @results,join(",", @b); 545: } 546: } 547: # &logthis("found: $stuff"); 548: $customresult.='&custom='.&escape($mfile).','. 549: escape($stuff); 550: } 551: } 552: $result=join("&",@results) unless $query; 553: $result.=$customresult; 554: # 555: return $result; 556: } # End of &do_sql_query 557: 558: } # End of scoping curly braces for &process_file and &do_sql_query 559: ######################################################## 560: ######################################################## 561: 562: =pod 563: 564: =item &logthis 565: 566: Inputs: $message, the message to log 567: 568: Returns: nothing 569: 570: Writes $message to the logfile. 571: 572: =cut 573: 574: ######################################################## 575: ######################################################## 576: sub logthis { 577: my $message=shift; 578: my $execdir=$perlvar{'lonDaemons'}; 579: my $fh=IO::File->new(">>$execdir/logs/lonsql.log"); 580: my $now=time; 581: my $local=localtime($now); 582: print $fh "$local ($$): $message\n"; 583: } 584: 585: # -------------------------------------------------- Non-critical communication 586: 587: ######################################################## 588: ######################################################## 589: 590: =pod 591: 592: =item &subreply 593: 594: Sends a command to a server. Called only by &reply. 595: 596: Inputs: $cmd,$server 597: 598: Returns: The results of the message or 'con_lost' on error. 599: 600: =cut 601: 602: ######################################################## 603: ######################################################## 604: sub subreply { 605: my ($cmd,$server)=@_; 606: my $peerfile="$perlvar{'lonSockDir'}/$server"; 607: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile", 608: Type => SOCK_STREAM, 609: Timeout => 10) 610: or return "con_lost"; 611: print $sclient "$cmd\n"; 612: my $answer=<$sclient>; 613: chomp($answer); 614: $answer="con_lost" if (!$answer); 615: return $answer; 616: } 617: 618: ######################################################## 619: ######################################################## 620: 621: =pod 622: 623: =item &reply 624: 625: Sends a command to a server. 626: 627: Inputs: $cmd,$server 628: 629: Returns: The results of the message or 'con_lost' on error. 630: 631: =cut 632: 633: ######################################################## 634: ######################################################## 635: sub reply { 636: my ($cmd,$server)=@_; 637: my $answer; 638: if ($server ne $perlvar{'lonHostID'}) { 639: $answer=subreply($cmd,$server); 640: if ($answer eq 'con_lost') { 641: $answer=subreply("ping",$server); 642: $answer=subreply($cmd,$server); 643: } 644: } else { 645: $answer='self_reply'; 646: $answer=subreply($cmd,$server); 647: } 648: return $answer; 649: } 650: 651: ######################################################## 652: ######################################################## 653: 654: =pod 655: 656: =item &escape 657: 658: Escape special characters in a string. 659: 660: Inputs: string to escape 661: 662: Returns: The input string with special characters escaped. 663: 664: =cut 665: 666: ######################################################## 667: ######################################################## 668: sub escape { 669: my $str=shift; 670: $str =~ s/(\W)/"%".unpack('H2',$1)/eg; 671: return $str; 672: } 673: 674: ######################################################## 675: ######################################################## 676: 677: =pod 678: 679: =item &unescape 680: 681: Unescape special characters in a string. 682: 683: Inputs: string to unescape 684: 685: Returns: The input string with special characters unescaped. 686: 687: =cut 688: 689: ######################################################## 690: ######################################################## 691: sub unescape { 692: my $str=shift; 693: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; 694: return $str; 695: } 696: 697: ######################################################## 698: ######################################################## 699: 700: =pod 701: 702: =item &ishome 703: 704: Determine if the current machine is the home server for a user. 705: The determination is made by checking the filesystem for the users information. 706: 707: Inputs: $author 708: 709: Returns: 0 - this is not the authors home server, 1 - this is. 710: 711: =cut 712: 713: ######################################################## 714: ######################################################## 715: sub ishome { 716: my $author=shift; 717: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/; 718: my ($udom,$uname)=split(/\//,$author); 719: my $proname=propath($udom,$uname); 720: if (-e $proname) { 721: return 1; 722: } else { 723: return 0; 724: } 725: } 726: 727: ######################################################## 728: ######################################################## 729: 730: =pod 731: 732: =item &propath 733: 734: Inputs: user name, user domain 735: 736: Returns: The full path to the users directory. 737: 738: =cut 739: 740: ######################################################## 741: ######################################################## 742: sub propath { 743: my ($udom,$uname)=@_; 744: $udom=~s/\W//g; 745: $uname=~s/\W//g; 746: my $subdir=$uname.'__'; 747: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/; 748: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname"; 749: return $proname; 750: } 751: 752: ######################################################## 753: ######################################################## 754: 755: =pod 756: 757: =item &courselog 758: 759: Inputs: $path, $command 760: 761: Returns: unescaped string of values. 762: 763: =cut 764: 765: ######################################################## 766: ######################################################## 767: sub courselog { 768: my ($path,$command)=@_; 769: my %filters=(); 770: foreach (split(/\:/,&unescape($command))) { 771: my ($name,$value)=split(/\=/,$_); 772: $filters{$name}=$value; 773: } 774: my @results=(); 775: open(IN,$path.'/activity.log') or return ('file_error'); 776: while (my $line=<IN>) { 777: chomp($line); 778: my ($timestamp,$host,$log)=split(/\:/,$line); 779: # 780: # $log has the actual log entries; currently still escaped, and 781: # %26(timestamp)%3a(url)%3a(user)%3a(domain) 782: # then additionally 783: # %3aPOST%3a(name)%3d(value)%3a(name)%3d(value) 784: # or 785: # %3aCSTORE%3a(name)%3d(value)%26(name)%3d(value) 786: # 787: # get delimiter between timestamped entries to be &&& 788: $log=~s/\%26(\d+)\%3a/\&\&\&$1\%3a/g; 789: # now go over all log entries 790: foreach (split(/\&\&\&/,&unescape($log))) { 791: my ($time,$res,$uname,$udom,$action,@values)=split(/\:/,$_); 792: my $values=&unescape(join(':',@values)); 793: $values=~s/\&/\:/g; 794: $res=&unescape($res); 795: my $include=1; 796: if (($filters{'username'}) && ($uname ne $filters{'username'})) 797: { $include=0; } 798: if (($filters{'domain'}) && ($udom ne $filters{'domain'})) 799: { $include=0; } 800: if (($filters{'url'}) && ($res!~/$filters{'url'}/)) 801: { $include=0; } 802: if (($filters{'start'}) && ($time<$filters{'start'})) 803: { $include=0; } 804: if (($filters{'end'}) && ($time>$filters{'end'})) 805: { $include=0; } 806: if (($filters{'action'} eq 'view') && ($action)) 807: { $include=0; } 808: if (($filters{'action'} eq 'submit') && ($action ne 'POST')) 809: { $include=0; } 810: if (($filters{'action'} eq 'grade') && ($action ne 'CSTORE')) 811: { $include=0; } 812: if ($include) { 813: push(@results,($time<1000000000?'0':'').$time.':'.$res.':'. 814: $uname.':'.$udom.':'. 815: $action.':'.$values); 816: } 817: } 818: } 819: close IN; 820: return join('&',sort(@results)); 821: } 822: 823: ######################################################## 824: ######################################################## 825: 826: =pod 827: 828: =item &userlog 829: 830: Inputs: $path, $command 831: 832: Returns: unescaped string of values. 833: 834: =cut 835: 836: ######################################################## 837: ######################################################## 838: sub userlog { 839: my ($path,$command)=@_; 840: my %filters=(); 841: foreach (split(/\:/,&unescape($command))) { 842: my ($name,$value)=split(/\=/,$_); 843: $filters{$name}=$value; 844: } 845: my @results=(); 846: open(IN,$path.'/activity.log') or return ('file_error'); 847: while (my $line=<IN>) { 848: chomp($line); 849: my ($timestamp,$host,$log)=split(/\:/,$line); 850: $log=&unescape($log); 851: my $include=1; 852: if (($filters{'start'}) && ($timestamp<$filters{'start'})) 853: { $include=0; } 854: if (($filters{'end'}) && ($timestamp>$filters{'end'})) 855: { $include=0; } 856: if (($filters{'action'} eq 'log') && ($log!~/^Log/)) { $include=0; } 857: if (($filters{'action'} eq 'check') && ($log!~/^Check/)) 858: { $include=0; } 859: if ($include) { 860: push(@results,$timestamp.':'.$log); 861: } 862: } 863: close IN; 864: return join('&',sort(@results)); 865: } 866: 867: ######################################################## 868: ######################################################## 869: 870: =pod 871: 872: =item Functions required for forking 873: 874: =over 4 875: 876: =item REAPER 877: 878: REAPER takes care of dead children. 879: 880: =item HUNTSMAN 881: 882: Signal handler for SIGINT. 883: 884: =item HUPSMAN 885: 886: Signal handler for SIGHUP 887: 888: =item DISCONNECT 889: 890: Disconnects from database. 891: 892: =back 893: 894: =cut 895: 896: ######################################################## 897: ######################################################## 898: sub REAPER { # takes care of dead children 899: $SIG{CHLD} = \&REAPER; 900: my $pid = wait; 901: $children --; 902: &logthis("Child $pid died"); 903: delete $children{$pid}; 904: } 905: 906: sub HUNTSMAN { # signal handler for SIGINT 907: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children 908: kill 'INT' => keys %children; 909: my $execdir=$perlvar{'lonDaemons'}; 910: unlink("$execdir/logs/lonsql.pid"); 911: &logthis("CRITICAL: Shutting down"); 912: $unixsock = "mysqlsock"; 913: my $port="$perlvar{'lonSockDir'}/$unixsock"; 914: unlink($port); 915: exit; # clean up with dignity 916: } 917: 918: sub HUPSMAN { # signal handler for SIGHUP 919: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children 920: kill 'INT' => keys %children; 921: close($server); # free up socket 922: &logthis("CRITICAL: Restarting"); 923: my $execdir=$perlvar{'lonDaemons'}; 924: $unixsock = "mysqlsock"; 925: my $port="$perlvar{'lonSockDir'}/$unixsock"; 926: unlink($port); 927: exec("$execdir/lonsql"); # here we go again 928: } 929: 930: sub DISCONNECT { 931: $dbh->disconnect or 932: &logthis("WARNING: Couldn't disconnect from database ". 933: " $DBI::errstr : $@"); 934: exit; 935: } 936: 937: 938: =pod 939: 940: =back 941: 942: =cut