version 1.35, 2001/04/17 15:47:19
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version 1.46, 2002/06/18 15:04:05
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#!/usr/bin/perl |
#!/usr/bin/perl |
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# The LearningOnline Network |
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# lonsql - LON TCP-MySQL-Server Daemon for handling database requests. |
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# |
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# $Id$ |
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# |
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# Copyright Michigan State University Board of Trustees |
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# |
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# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
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# |
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# LON-CAPA is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# LON-CAPA is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with LON-CAPA; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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# /home/httpd/html/adm/gpl.txt |
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# |
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# http://www.lon-capa.org/ |
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# |
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# YEAR=2000 |
# lonsql-based on the preforker:harsha jagasia:date:5/10/00 |
# lonsql-based on the preforker:harsha jagasia:date:5/10/00 |
# 7/25 Gerd Kortemeyer |
# 7/25 Gerd Kortemeyer |
# many different dates Scott Harrison |
# many different dates Scott Harrison |
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# YEAR=2001 |
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# many different dates Scott Harrison |
# 03/22/2001 Scott Harrison |
# 03/22/2001 Scott Harrison |
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# 8/30 Gerd Kortemeyer |
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# 10/17,11/28,11/29,12/20 Scott Harrison |
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# YEAR=2001 |
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# 5/11 Scott Harrison |
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# |
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### |
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############################################################################### |
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## ## |
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## ORGANIZATION OF THIS PERL SCRIPT ## |
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## 1. Modules used ## |
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## 2. Enable find subroutine ## |
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## 3. Read httpd config files and get variables ## |
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## 4. Make sure that database can be accessed ## |
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## 5. Make sure this process is running from user=www ## |
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## 6. Check if other instance is running ## |
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## 7. POD (plain old documentation, CPAN style) ## |
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## ## |
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############################################################################### |
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use lib '/home/httpd/lib/perl/'; |
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use LONCAPA::Configuration; |
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use IO::Socket; |
use IO::Socket; |
use Symbol; |
use Symbol; |
use POSIX; |
use POSIX; |
Line 26 sub wanted {
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Line 80 sub wanted {
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$childmaxattempts=10; |
$childmaxattempts=10; |
$run =0;#running counter to generate the query-id |
$run =0;#running counter to generate the query-id |
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# ------------------------------------ Read httpd access.conf and get variables |
# -------------------------------- Read loncapa_apache.conf and loncapa.conf |
open (CONFIG,"/etc/httpd/conf/access.conf") || die "Can't read access.conf"; |
my $perlvarref=LONCAPA::Configuration::read_conf('loncapa_apache.conf', |
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'loncapa.conf'); |
while ($configline=<CONFIG>) { |
my %perlvar=%{$perlvarref}; |
if ($configline =~ /PerlSetVar/) { |
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my ($dummy,$varname,$varvalue)=split(/\s+/,$configline); |
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chomp($varvalue); |
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$perlvar{$varname}=$varvalue; |
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} |
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} |
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close(CONFIG); |
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# ------------------------------------- Make sure that database can be accessed |
# ------------------------------------- Make sure that database can be accessed |
{ |
{ |
Line 45 close(CONFIG);
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Line 92 close(CONFIG);
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$dbh = DBI->connect("DBI:mysql:loncapa","www",$perlvar{'lonSqlAccess'},{ RaiseError =>0,PrintError=>0}) |
$dbh = DBI->connect("DBI:mysql:loncapa","www",$perlvar{'lonSqlAccess'},{ RaiseError =>0,PrintError=>0}) |
) { |
) { |
print "Cannot connect to database!\n"; |
print "Cannot connect to database!\n"; |
exit; |
$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}"; |
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$subj="LON: $perlvar{'lonHostID'} Cannot connect to database!"; |
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system("echo 'Cannot connect to MySQL database!' |\ |
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mailto $emailto -s '$subj' > /dev/null"); |
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exit 1; |
} |
} |
else { |
else { |
$dbh->disconnect; |
$dbh->disconnect; |
Line 79 while ($configline=<CONFIG>) {
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Line 130 while ($configline=<CONFIG>) {
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} |
} |
close(CONFIG); |
close(CONFIG); |
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$PREFORK=int($PREFORK/4); |
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$unixsock = "mysqlsock"; |
$unixsock = "mysqlsock"; |
my $localfile="$perlvar{'lonSockDir'}/$unixsock"; |
my $localfile="$perlvar{'lonSockDir'}/$unixsock"; |
my $server; |
my $server; |
Line 136 sub logthis {
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Line 189 sub logthis {
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my $local=localtime($now); |
my $local=localtime($now); |
print $fh "$local ($$): $message\n"; |
print $fh "$local ($$): $message\n"; |
} |
} |
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# ------------------------------------------------------------------ Course log |
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sub courselog { |
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my ($path,$command)=@_; |
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my %filters=(); |
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foreach (split(/\=/,&unescape($command))) { |
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my ($name,$value)=split(/\=/,$_); |
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$filters{$name}=$value; |
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} |
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my @results=(); |
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open(IN,$path.'/activity.log') or return ('file_error'); |
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while ($line=<IN>) { |
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chomp($line); |
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my ($timestamp,$host,$log)=split(/\:/,$line); |
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foreach (split(/\&/,&unescape($log))) { |
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my ($res,$uname,$udom,$action,$values)=split(/\:/,$_); |
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my $include=1; |
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} |
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} |
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close IN; |
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return join('&',sort(@results)); |
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} |
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# -------------------------------------------------------------------- User log |
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sub userlog { |
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my ($path,$command)=@_; |
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my %filters=(); |
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foreach (split(/\=/,&unescape($command))) { |
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my ($name,$value)=split(/\=/,$_); |
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$filters{$name}=$value; |
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} |
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my @results=(); |
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open(IN,$path.'/activity.log') or return ('file_error'); |
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while ($line=<IN>) { |
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chomp($line); |
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my ($timestamp,$host,$log)=split(/\:/,$line); |
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$log=&unescape($log); |
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my $include=1; |
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if (($filters{'action'} eq 'log') && ($log!~/^Log/)) { $include=0; } |
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if ($include) { |
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push(@results,$timestamp.':'.$log); |
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} |
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} |
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close IN; |
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return join('&',sort(@results)); |
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} |
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# ---------------------------------------------------- Fork once and dissociate |
# ---------------------------------------------------- Fork once and dissociate |
$fpid=fork; |
$fpid=fork; |
exit if $fpid; |
exit if $fpid; |
Line 223 sub make_new_child {
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Line 326 sub make_new_child {
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my $userinput = <$client>; |
my $userinput = <$client>; |
chomp($userinput); |
chomp($userinput); |
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my ($conserver,$querytmp, |
my ($conserver,$query, |
$customtmp,$customshowtmp)=split(/&/,$userinput); |
$arg1,$arg2,$arg3)=split(/&/,$userinput); |
my $query=unescape($querytmp); |
my $query=unescape($query); |
my $custom=unescape($customtmp); |
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my $customshow=unescape($customshowtmp); |
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#send query id which is pid_unixdatetime_runningcounter |
#send query id which is pid_unixdatetime_runningcounter |
$queryid = $thisserver; |
$queryid = $thisserver; |
Line 237 sub make_new_child {
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Line 338 sub make_new_child {
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print $client "$queryid\n"; |
print $client "$queryid\n"; |
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&logthis("QUERY: $query"); |
&logthis("QUERY: $query"); |
&logthis("QUERY: $query"); |
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sleep 1; |
sleep 1; |
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my $result=''; |
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# ---------- At this point, query is received, query-ID assigned and sent back |
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# $query eq 'logquery' will mean that this is a query against log-files |
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if (($query eq 'userlog') || ($query eq 'courselog')) { |
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# ----------------------------------------------------- beginning of log query |
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# |
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# this goes against a user's log file |
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# |
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my $udom=&unescape($arg1); |
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my $uname=&unescape($arg2); |
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my $command=&unescape($arg3); |
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my $path=&propath($udom,$uname); |
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if (-e "$path/activity.log") { |
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if ($query eq 'userlog') { |
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$result=&userlog($path,$command); |
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} else { |
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$result=&courselog($path,$command); |
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} |
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} else { |
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&logthis('Unable to do log query: '.$uname.'@'.$udom); |
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$result='no_such_file'; |
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} |
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# ------------------------------------------------------------ end of log query |
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} else { |
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# -------------------------------------------------------- This is an sql query |
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my $custom=unescape($arg1); |
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my $customshow=unescape($arg2); |
#prepare and execute the query |
#prepare and execute the query |
my $sth = $dbh->prepare($query); |
my $sth = $dbh->prepare($query); |
my $result; |
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my @files; |
my @files; |
my $subsetflag=0; |
my $subsetflag=0; |
if ($query) { |
if ($query) { |
Line 253 sub make_new_child {
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Line 384 sub make_new_child {
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else { |
else { |
my $r1=$sth->fetchall_arrayref; |
my $r1=$sth->fetchall_arrayref; |
my @r2; |
my @r2; |
map {my $a=$_; |
foreach (@$r1) {my $a=$_; |
my @b=map {escape($_)} @$a; |
my @b=map {escape($_)} @$a; |
push @files,@{$a}[3]; |
push @files,@{$a}[3]; |
push @r2,join(",", @b) |
push @r2,join(",", @b) |
} (@$r1); |
} |
$result=join("&",@r2); |
$result=join("&",@r2); |
} |
} |
} |
} |
Line 295 sub make_new_child {
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Line 426 sub make_new_child {
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'creationdate','keywords','language', |
'creationdate','keywords','language', |
'lastrevisiondate','mime','notes', |
'lastrevisiondate','mime','notes', |
'owner','subject','title') { |
'owner','subject','title') { |
$stuff=~s/\n?\<$f[^\>]*\>.*?<\/$f[^\>]*\>\n?//; |
$stuff=~s/\n?\<$f[^\>]*\>.*?<\/$f[^\>]*\>\n?//s; |
} |
} |
my $m2=$m; my $docroot=$perlvar{'lonDocRoot'}; |
my $m2=$m; my $docroot=$perlvar{'lonDocRoot'}; |
$m2=~s/^$docroot//; |
$m2=~s/^$docroot//; |
Line 305 sub make_new_child {
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Line 436 sub make_new_child {
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my $sth = $dbh->prepare($q2); |
my $sth = $dbh->prepare($q2); |
$sth->execute(); |
$sth->execute(); |
my $r1=$sth->fetchall_arrayref; |
my $r1=$sth->fetchall_arrayref; |
map {my $a=$_; |
foreach (@$r1) {my $a=$_; |
my @b=map {escape($_)} @$a; |
my @b=map {escape($_)} @$a; |
push @files,@{$a}[3]; |
push @files,@{$a}[3]; |
push @r2,join(",", @b) |
push @r2,join(",", @b) |
} (@$r1); |
} |
} |
} |
# &logthis("found: $stuff"); |
# &logthis("found: $stuff"); |
$customresult.='&custom='.escape($m2).','.escape($stuff); |
$customresult.='&custom='.escape($m2).','.escape($stuff); |
Line 318 sub make_new_child {
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Line 449 sub make_new_child {
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$result=join("&",@r2) unless $query; |
$result=join("&",@r2) unless $query; |
$result.=$customresult; |
$result.=$customresult; |
} |
} |
# reply with result |
# ------------------------------------------------------------ end of sql query |
$result.="\n" if $result; |
} |
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# result does need to be escaped |
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$result=&escape($result); |
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# reply with result, append \n unless already there |
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$result.="\n" unless ($result=~/\n$/); |
&reply("queryreply:$queryid:$result",$conserver); |
&reply("queryreply:$queryid:$result",$conserver); |
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} |
} |
Line 416 sub propath {
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Line 555 sub propath {
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my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname"; |
my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname"; |
return $proname; |
return $proname; |
} |
} |
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# ----------------------------------- POD (plain old documentation, CPAN style) |
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=head1 NAME |
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lonsql - LON TCP-MySQL-Server Daemon for handling database requests. |
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=head1 SYNOPSIS |
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This script should be run as user=www. The following is an example invocation |
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from the loncron script. Note that a lonsql.pid file contains the pid of |
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the parent process. |
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if (-e $lonsqlfile) { |
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my $lfh=IO::File->new("$lonsqlfile"); |
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my $lonsqlpid=<$lfh>; |
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chomp($lonsqlpid); |
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if (kill 0 => $lonsqlpid) { |
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print $fh "<h3>lonsql at pid $lonsqlpid responding</h3>"; |
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$restartflag=0; |
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} else { |
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$errors++; $errors++; |
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print $fh "<h3>lonsql at pid $lonsqlpid not responding</h3>"; |
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$restartflag=1; |
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print $fh |
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"<h3>Decided to clean up stale .pid file and restart lonsql</h3>"; |
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} |
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} |
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if ($restartflag==1) { |
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$errors++; |
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print $fh '<br><font color="red">Killall lonsql: '. |
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system('killall lonsql').' - '; |
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sleep 60; |
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print $fh unlink($lonsqlfile).' - '. |
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system('killall -9 lonsql'). |
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'</font><br>'; |
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print $fh "<h3>lonsql not running, trying to start</h3>"; |
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system( |
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"$perlvar{'lonDaemons'}/lonsql 2>>$perlvar{'lonDaemons'}/logs/lonsql_errors"); |
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sleep 10; |
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=head1 DESCRIPTION |
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Not yet written. |
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=head1 README |
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Not yet written. |
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=head1 PREREQUISITES |
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IO::Socket |
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Symbol |
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POSIX |
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IO::Select |
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IO::File |
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Socket |
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Fcntl |
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Tie::RefHash |
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DBI |
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=head1 COREQUISITES |
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=head1 OSNAMES |
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linux |
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=head1 SCRIPT CATEGORIES |
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Server/Process |
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=cut |