206 lines
7.0 KiB
Perl
206 lines
7.0 KiB
Perl
#!/usr/bin/perl -wT
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#
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# ==========================================================================
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#
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# ZoneMinder WatchDog Script, $Date$, $Revision$
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# Copyright (C) 2001-2008 Philip Coombes
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program 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 this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# ==========================================================================
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=head1 NAME
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zmwatch.pl - ZoneMinder WatchDog Script
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=head1 SYNOPSIS
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zmwatch.pl
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=head1 DESCRIPTION
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This does some basic setup for ZoneMinder to run and then periodically
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checks the fps output of the active daemons to check they haven't
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locked up. If they have then they are killed and restarted
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=cut
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use strict;
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use bytes;
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# ==========================================================================
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#
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# These are the elements you can edit to suit your installation
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#
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# ==========================================================================
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use constant START_DELAY => 30; # To give everything else time to start
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# ==========================================================================
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#
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# Don't change anything below here
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#
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# ==========================================================================
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@EXTRA_PERL_LIB@
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use ZoneMinder;
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use ZoneMinder::Storage;
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use POSIX;
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use DBI;
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use autouse 'Data::Dumper'=>qw(Dumper);
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$| = 1;
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$ENV{PATH} = '/bin:/usr/bin:/usr/local/bin';
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$ENV{SHELL} = '/bin/sh' if exists $ENV{SHELL};
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delete @ENV{qw(IFS CDPATH ENV BASH_ENV)};
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logInit();
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logSetSignal();
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Info('Watchdog starting, pausing for '.START_DELAY.' seconds');
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sleep(START_DELAY);
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my $dbh = zmDbConnect();
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my $sql = $Config{ZM_SERVER_ID} ? 'SELECT * FROM Monitors WHERE ServerId=?' : 'SELECT * FROM Monitors';
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my $sth = $dbh->prepare_cached($sql)
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or Fatal("Can't prepare '$sql': ".$dbh->errstr());
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while( 1 ) {
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while ( ! ( $dbh and $dbh->ping() ) ) {
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if ( ! ( $dbh = zmDbConnect() ) ) {
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sleep($Config{ZM_WATCH_CHECK_INTERVAL});
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}
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}
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my $res = $sth->execute( $Config{ZM_SERVER_ID} ? $Config{ZM_SERVER_ID} : () )
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or Fatal('Can\'t execute: '.$sth->errstr());
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while( my $monitor = $sth->fetchrow_hashref() ) {
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next if $monitor->{Function} eq 'None';
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next if $monitor->{Type} eq 'WebSite';
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my $now = time();
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my $restart = 0;
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if ( zmMemVerify($monitor) ) {
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# Check we have got an image recently
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my $capture_time = zmGetLastWriteTime($monitor);
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if ( !defined($capture_time) ) {
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# Can't read from shared data
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Debug('LastWriteTime is not defined.');
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zmMemInvalidate($monitor);
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next;
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}
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Debug("Monitor $$monitor{Id} LastWriteTime is $capture_time.");
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if ( !$capture_time ) {
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my $startup_time = zmGetStartupTime($monitor);
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if ( ( $now - $startup_time ) > $Config{ZM_WATCH_MAX_DELAY} ) {
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Info(
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"Restarting capture daemon for $$monitor{Name}, no image since startup. ".
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"Startup time was $startup_time - now $now > $Config{ZM_WATCH_MAX_DELAY}"
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);
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$restart = 1;
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} else {
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# We can't get the last capture time so can't be sure it's died, it might just be starting up.
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zmMemInvalidate($monitor);
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next;
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}
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}
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if ( ! $restart ) {
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my $max_image_delay = (
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$monitor->{MaxFPS}
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&&($monitor->{MaxFPS}>0)
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&&($monitor->{MaxFPS}<1)
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) ? (3/$monitor->{MaxFPS})
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: $Config{ZM_WATCH_MAX_DELAY}
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;
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my $image_delay = $now-$capture_time;
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Debug("Monitor $monitor->{Id} last captured $image_delay seconds ago, max is $max_image_delay");
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if ( $image_delay > $max_image_delay ) {
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Info("Restarting capture daemon for "
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.$monitor->{Name}.", time since last capture $image_delay seconds ($now-$capture_time)"
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);
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$restart = 1;
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}
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} # end if ! restart
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} else {
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Info("Restarting capture daemon for $monitor->{Name}, shared data not valid");
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$restart = 1;
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}
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if ( $restart ) {
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# Because zma depends on zmc, and zma can hold the shm in place, preventing zmc from using the space in /dev/shm,
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# we need to stop zma before restarting zmc.
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runCommand("zmdc.pl stop zma -m $$monitor{Id}") if $monitor->{Function} ne 'Monitor';
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my $command;
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if ( $monitor->{Type} eq 'Local' ) {
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$command = "zmdc.pl restart zmc -d $monitor->{Device}";
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} else {
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$command = "zmdc.pl restart zmc -m $monitor->{Id}";
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}
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runCommand($command);
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runCommand("zmdc.pl start zma -m $$monitor{Id}") if $monitor->{Function} ne 'Monitor';
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} elsif ( $monitor->{Function} ne 'Monitor' ) {
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# Now check analysis daemon
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$restart = 0;
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# Check we have got an image recently
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my $image_time = zmGetLastReadTime($monitor);
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if ( !defined($image_time) ) {
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# Can't read from shared data
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$restart = 1;
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Error("Error reading shared data for $$monitor{Id} $$monitor{Name}");
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} elsif ( !$image_time ) {
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# We can't get the last capture time so can't be sure it's died.
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$restart = 1;
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Error("Last analyse time for $$monitor{Id} $$monitor{Name} was zero.");
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} else {
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my $max_image_delay = ( $monitor->{MaxFPS}
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&&($monitor->{MaxFPS}>0)
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&&($monitor->{MaxFPS}<1)
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) ? (3/$monitor->{MaxFPS})
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: $Config{ZM_WATCH_MAX_DELAY}
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;
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my $image_delay = $now-$image_time;
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Debug("Monitor $monitor->{Id} last analysed $image_delay seconds ago, max is $max_image_delay");
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if ( $image_delay > $max_image_delay ) {
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Info("Analysis daemon for $$monitor{Id} $$monitor{Name} needs restarting,"
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." time since last analysis $image_delay seconds ($now-$image_time)"
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);
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$restart = 1;
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}
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}
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if ( $restart ) {
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Info("Restarting analysis daemon for $$monitor{Id} $$monitor{Name}\n");
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my $command;
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if ( $monitor->{Type} eq 'Local' ) {
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$command = "zmdc.pl restart zmc -d $monitor->{Device}";
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} else {
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$command = "zmdc.pl restart zmc -m $monitor->{Id}";
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}
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runCommand($command);
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} # end if restart
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} # end if check analysis daemon
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# Prevent open handles building up if we have connect to shared memory
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zmMemInvalidate($monitor); # Close our file handle to the zmc process we are about to end
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} # end foreach monitor
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sleep($Config{ZM_WATCH_CHECK_INTERVAL});
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} # end while (1)
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Info("Watchdog exiting");
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exit();
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1;
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__END__
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