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#!/usr/bin/perl
#
# ClamAV updater. Original code by Julian Field. Timeout code by
# Alessandro Bianchi. Timeout code is not perfect but should be okay.
#
use Sys::Syslog;
# If you have a web proxy or cache server, put its value in the next line
# in the syntax "full.host.name:port".
$HTTPproxy = "";
$PackageDir = shift || "/opt/vba/vbacl";
$UpdateCommand = "$PackageDir/vbaupdx";
$LockFile = shift || "/var/spool/MailScanner/incoming/Locks/vba32Busy.lock";
$LOCK_SH = 1;
$LOCK_EX = 2;
$LOCK_NB = 4;
$LOCK_UN = 8;
eval { Sys::Syslog::setlogsock('unix'); }; # This may fail!
Sys::Syslog::openlog("vba32-autoupdate", 'pid, nowait', 'mail');
if (-x $UpdateCommand) {
# Timeout prevention
$SIG{ALRM} = sub { die "timeout"};
&Lock();
eval {
alarm 300;
$Command = "$UpdateCommand $PackageDir";
$Command .= " --http-proxy $HTTPproxy" if $HTTPproxy;
$retval = &Update($Command); # system($Command)>>8;
&Unlock();
alarm 0;
};
if ($@) {
if ($@ =~ /timeout/) {
# We timed out!
&Unlock();
Sys::Syslog::syslog('err', "WARNING vba32 update timed out");
alarm 0;
}
} else {
alarm 0;
if ($retval == 0 ) {
Sys::Syslog::syslog('info', "vba32 updated");
}
}
} else {
Sys::Syslog::syslog('err', "vba32 updater $UpdateCommand cannot be run");
}
Sys::Syslog::closelog();
exit 0;
sub Lock {
open(LOCK, ">$LockFile") or return;
flock(LOCK, $LOCK_EX);
print LOCK "Locked for updating vba32 definitions by $$\n";
}
sub Unlock {
print LOCK "Unlocked after updating vba32 definitions by $$\n";
flock(LOCK, $LOCK_UN);
close LOCK;
}
sub Update {
my($cmd) = @_;
open(CMD, "$cmd 2>&1 |") or return $?;
while(<CMD>) {
chomp;
Sys::Syslog::syslog('err', "vba32 update warning: $_")
if /warning|error|fatal/i;
}
close CMD;
return $?>>8;
}
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