128 lines
4.2 KiB
Perl
Executable File
128 lines
4.2 KiB
Perl
Executable File
#!/usr/bin/perl -wT
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#
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# ==========================================================================
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#
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# Zone Minder WatchDog Script, $Date$, $Revision$
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# Copyright (C) 2002 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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#
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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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#
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# ==========================================================================
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#
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# These are the elements you need to edit to suit your installation
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#
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# ==========================================================================
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use constant DB_NAME => "zm";
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use constant DB_USER => "zmadmin";
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use constant DB_PASS => "zmadminzm";
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use constant COMMAND_PATH => '@prefix@/bin/';
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use constant WATCH_LOG_FILE => '/tmp/zmwatch.log';
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use constant CHECK_INTERVAL => 10; # How often to check the FPS
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use constant NUM_BAD_CHECKS => 3; # How many bad checks before we restart
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use constant MIN_FPS => 0.5; # FPS at or below this are bad
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use constant VERBOSE => 0; # Whether to output more verbose debug
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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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use strict;
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use POSIX;
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use DBI;
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use Data::Dumper;
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$| = 1;
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$ENV{PATH} = '/bin:/usr/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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sub Usage
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{
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print( "
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Usage: zmwatch.pl
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");
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exit( -1 );
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}
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open( LOG, '>>'.WATCH_LOG_FILE ) or die( "Can't open log file: $!" );
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open( STDOUT, ">&LOG" ) || die( "Can't dup stdout: $!" );
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select( STDOUT ); $| = 1;
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open( STDERR, ">&LOG" ) || die( "Can't dup stderr: $!" );
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select( STDERR ); $| = 1;
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select( LOG ); $| = 1;
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print( "Watchdog starting at ".strftime( '%y/%m/%d %H:%M:%S', localtime() )."\n" );
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my $dbh = DBI->connect( "DBI:mysql@".DB_SERVER.":".DB_NAME, DB_USER, DB_PASS );
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my $sql = "select * from Monitors";
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my $sth = $dbh->prepare_cached( $sql ) or die( "Can't prepare '$sql': ".$dbh->errstr() );
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my %fps_hash;
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while( 1 )
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{
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my $res = $sth->execute() or die( "Can't execute: ".$sth->errstr() );
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while( my $monitor = $sth->fetchrow_hashref() )
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{
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if ( $monitor->{Function} ne 'None' )
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{
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my $fps_list = $fps_hash{$monitor->{Id}};
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if ( !$fps_list )
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{
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$fps_list = $fps_hash{$monitor->{Id}} = [];
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}
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# Check we are getting a decent FPS, if not then kill it
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my $command = COMMAND_PATH."zmu -m ".$monitor->{Id}." -f";
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print( "Getting FPS for monitor $monitor->{Id} ('$command')\n" ) if ( VERBOSE );
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my $fps = qx( $command );
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chomp($fps);
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print( "Monitor $monitor->{Id} capturing at $fps FPS\n" ) if ( VERBOSE );
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push( @$fps_list, $fps );
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if ( @$fps_list > NUM_BAD_CHECKS )
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{
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shift( @$fps_list );
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# See if we can find any good FPS readings
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my @good_fps = grep { $_ > MIN_FPS } @$fps_list;
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if ( @good_fps < NUM_BAD_CHECKS )
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{
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print( "Monitor $monitor->{Id} has ".(NUM_BAD_CHECKS-int(@good_fps))." samples below ".MIN_FPS." FPS\n" );
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}
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if ( @good_fps )
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{
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# Yes, so continue
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next;
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}
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# If we are here then something bad has happened
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$command = COMMAND_PATH."zmdc.pl restart zmc -d ".$monitor->{Device};
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print( "Restarting capture daemon ('$command')\n" );
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print( qx( $command ) );
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}
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}
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}
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sleep( CHECK_INTERVAL );
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}
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print( "Watchdog exiting at ".strftime( '%y/%m/%d %H:%M:%S', localtime() )."\n" );
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exit();
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