189 lines
6.5 KiB
Perl
189 lines
6.5 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 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\n" );
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Info( "Watchdog pausing for ".START_DELAY." seconds\n" );
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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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{
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my $now = time();
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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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{
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next if $monitor->{Function} eq 'None';
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my $restart = 0;
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if ( zmMemVerify( $monitor )
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&& zmMemRead( $monitor, "shared_data:valid" )
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)
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{
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# Check we have got an image recently
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my $image_time = zmGetLastWriteTime( $monitor );
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if ( !defined($image_time) ) {
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# Can't read from shared data
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Debug( "LastWriteTime is not defined." );
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next;
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}
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if ( !$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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Debug( "LastWriteTime is = $image_time." );
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next;
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}
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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 captured $image_delay seconds ago, max is $max_image_delay\n" );
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if ( $image_delay > $max_image_delay )
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{
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Info( "Restarting capture daemon for "
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.$monitor->{Name}.", time since last capture $image_delay seconds ($now-$image_time)\n"
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);
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$restart = 1;
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}
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}
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else
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{
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Info( "Restarting capture daemon for ".$monitor->{Name}.", shared data not valid\n" );
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$restart = 1;
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}
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if ( $restart )
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{
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my $command;
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if ( $monitor->{Type} eq 'Local' )
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{
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$command = "zmdc.pl restart zmc -d $monitor->{Device}";
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}
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else
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{
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$command = "zmdc.pl restart zmc -m $monitor->{Id}";
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}
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runCommand( $command );
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}
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elsif ( $monitor->{Function} ne 'Monitor' )
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{
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# Now check analysis daemon
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$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}\n");
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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( "Error getting last capture time for $$monitor{id} $$monitor{Name}\n");
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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\n" );
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if ( $image_delay > $max_image_delay )
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{
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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-$image_time)\n"
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);
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$restart = 1;
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}
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}
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if ( $restart )
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{
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Info( "Restarting analysis daemon for $$monitor{id} $$monitor{Name}\n");
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my $command = "zmdc.pl restart zma -m ".$monitor->{Id};
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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 );
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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\n" );
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exit();
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