431 lines
12 KiB
Perl
431 lines
12 KiB
Perl
#!/usr/bin/perl -wT
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#
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# ==========================================================================
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#
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# ZoneMinder External Trigger Script, $Date$, $Revision$
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# Copyright (C) 2003, 2004, 2005, 2006 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 script is used to trigger and cancel alarms from external connections
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# using an arbitrary text based format
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#
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use strict;
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use bytes;
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# ==========================================================================
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#
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# User config
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#
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# ==========================================================================
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use constant DBG_ID => "zmtrigger"; # Tag that appears in debug to identify source
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use constant DBG_LEVEL => 0; # 0 is errors, warnings and info only, > 0 for debug
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use constant MAX_CONNECT_DELAY => 10;
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use constant MONITOR_RELOAD_INTERVAL => 300;
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use constant SELECT_TIMEOUT => 0.25;
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use ZoneMinder::Trigger::Channel::Inet;
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use ZoneMinder::Trigger::Channel::Unix;
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use ZoneMinder::Trigger::Channel::Serial;
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use ZoneMinder::Trigger::Connection;
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my @connections;
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push( @connections, ZoneMinder::Trigger::Connection->new( name=>"Chan1", channel=>ZoneMinder::Trigger::Channel::Inet->new( port=>6802 ), mode=>"rw" ) );
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push( @connections, ZoneMinder::Trigger::Connection->new( name=>"Chan2", channel=>ZoneMinder::Trigger::Channel::Unix->new( path=>'/tmp/test.sock' ), mode=>"rw" ) );
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#push( @connections, ZoneMinder::Trigger::Connection->new( name=>"Chan3", channel=>ZoneMinder::Trigger::Channel::File->new( path=>'/tmp/zmtrigger.out' ), mode=>"w" ) );
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push( @connections, ZoneMinder::Trigger::Connection->new( name=>"Chan4", channel=>ZoneMinder::Trigger::Channel::Serial->new( path=>'/dev/ttyS0' ), mode=>"rw" ) );
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# ==========================================================================
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#
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# Don't change anything from here on down
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#
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# ==========================================================================
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use ZoneMinder;
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use DBI;
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#use Socket;
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use Data::Dumper;
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use POSIX qw( EINTR );
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use Time::HiRes qw( usleep );
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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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zmDbgInit( DBG_ID, level=>DBG_LEVEL );
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zmDbgSetSignal();
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Info( "Trigger daemon starting\n" );
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my $dbh = zmDbConnect();
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my $base_rin = '';
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foreach my $connection ( @connections )
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{
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Info( "Opening connection '$connection->{name}'\n" );
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$connection->open();
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}
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my @in_select_connections = grep { $_->input() && $_->selectable() } @connections;
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my @in_poll_connections = grep { $_->input() && !$_->selectable() } @connections;
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my @out_connections = grep { $_->output() } @connections;
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foreach my $connection ( @in_select_connections )
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{
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vec( $base_rin, $connection->fileno(), 1 ) = 1;
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}
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my %spawned_connections;
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my %monitors;
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my $monitor_reload_time = 0;
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$! = undef;
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my $rin = '';
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my $win = $rin;
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my $ein = $win;
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my $timeout = SELECT_TIMEOUT;
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my %actions;
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while( 1 )
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{
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$rin = $base_rin;
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# Add the file descriptors of any spawned connections
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foreach my $fileno ( keys(%spawned_connections) )
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{
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vec( $rin, $fileno, 1 ) = 1;
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}
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my $nfound = select( my $rout = $rin, undef, my $eout = $ein, $timeout );
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if ( $nfound > 0 )
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{
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Debug( "Got input from $nfound connections\n" );
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foreach my $connection ( @in_select_connections )
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{
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if ( vec( $rout, $connection->fileno(), 1 ) )
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{
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Debug( "Got input from connection ".$connection->name()." (".$connection->fileno().")\n" );
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if ( $connection->spawns() )
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{
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my $new_connection = $connection->accept();
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$spawned_connections{$new_connection->fileno()} = $new_connection;
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Debug( "Added new spawned connection (".$new_connection->fileno()."), ".int(keys(%spawned_connections))." spawned connections\n" );
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}
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else
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{
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my $messages = $connection->getMessages();
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if ( defined($messages) )
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{
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foreach my $message ( @$messages )
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{
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handleMessage( $connection, $message );
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}
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}
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}
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}
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}
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foreach my $connection ( values(%spawned_connections) )
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{
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if ( vec( $rout, $connection->fileno(), 1 ) )
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{
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Debug( "Got input from spawned connection ".$connection->name()." (".$connection->fileno().")\n" );
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my $messages = $connection->getMessages();
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if ( defined($messages) )
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{
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foreach my $message ( @$messages )
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{
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handleMessage( $connection, $message );
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}
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}
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else
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{
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delete( $spawned_connections{$connection->fileno()} );
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Debug( "Removed spawned connection (".$connection->fileno()."), ".int(keys(%spawned_connections))." spawned connections\n" );
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$connection->close();
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}
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}
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}
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}
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elsif ( $nfound < 0 )
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{
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if ( $! == EINTR )
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{
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# Do nothing
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}
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else
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{
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Fatal( "Can't select: $!" );
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}
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}
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# Check polled connections
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foreach my $connection ( @in_poll_connections )
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{
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my $messages = $connection->getMessages();
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if ( defined($messages) )
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{
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foreach my $message ( @$messages )
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{
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handleMessage( $connection, $message );
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}
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}
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}
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# Check for alarms that might have happened
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my @out_messages;
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foreach my $monitor ( values(%monitors) )
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{
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my ( $state, $last_event ) = zmShmRead( $monitor, [ "shared_data:state", "shared_data:last_event" ] );
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#print( "$monitor->{Id}: S:$state, LE:$last_event\n" );
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#print( "$monitor->{Id}: mS:$monitor->{LastState}, mLE:$monitor->{LastEvent}\n" );
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if ( $state == STATE_ALARM || $state == STATE_ALERT ) # In alarm state
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{
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if ( !defined($monitor->{LastEvent}) || ($last_event != $monitor->{LastEvent}) ) # A new event
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{
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push( @out_messages, $monitor->{Id}."|on|".time()."|".$last_event );
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}
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else # The same one as last time, so ignore it
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{
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# Do nothing
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}
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}
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elsif ( $state == STATE_IDLE && $monitor->{LastState} > STATE_IDLE ) # Out of alarm state
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{
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push( @out_messages, $monitor->{Id}."|off|".time()."|".$last_event );
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}
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elsif ( defined($monitor->{LastEvent}) && ($last_event != $monitor->{LastEvent}) ) # We've missed a whole event
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{
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push( @out_messages, $monitor->{Id}."|on|".time()."|".$last_event );
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push( @out_messages, $monitor->{Id}."|off|".time()."|".$last_event );
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}
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$monitor->{LastState} = $state;
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$monitor->{LastEvent} = $last_event;
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}
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foreach my $connection ( @out_connections )
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{
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if ( $connection->canWrite() )
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{
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$connection->putMessages( \@out_messages );
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}
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}
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foreach my $connection ( values(%spawned_connections) )
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{
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if ( $connection->canWrite() )
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{
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$connection->putMessages( \@out_messages );
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}
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}
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Debug( "Checking for timed actions\n" ) if ( int(keys(%actions)) );
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my $now = time();
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foreach my $action_time ( sort( grep { $_ < $now } keys( %actions ) ) )
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{
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Info( "Found actions expiring at $action_time\n" );
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foreach my $action ( @{$actions{$action_time}} )
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{
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my $connection = $action->{connection};
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my $message = $action->{message};
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Info( "Found action '$message'\n" );
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handleMessage( $connection, $message );
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}
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delete( $actions{$action_time} );
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}
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# Allow connections to do their own timed actions
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foreach my $connection ( @connections )
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{
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my $messages = $connection->timedActions();
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if ( defined($messages) )
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{
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foreach my $message ( @$messages )
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{
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handleMessage( $connection, $message );
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}
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}
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}
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foreach my $connection ( values(%spawned_connections) )
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{
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my $messages = $connection->timedActions();
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if ( defined($messages) )
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{
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foreach my $message ( @$messages )
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{
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handleMessage( $connection, $message );
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}
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}
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}
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# If necessary reload monitors
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if ( (time() - $monitor_reload_time) > MONITOR_RELOAD_INTERVAL )
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{
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loadMonitors();
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}
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}
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Info( "Trigger daemon exiting\n" );
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exit;
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sub loadMonitors
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{
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Debug( "Loading monitors\n" );
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$monitor_reload_time = time();
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my %new_monitors = ();
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my $sql = "select * from Monitors where find_in_set( Function, 'Modect,Mocord,Nodect' )";
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my $sth = $dbh->prepare_cached( $sql ) or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
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my $res = $sth->execute() or Fatal( "Can't execute: ".$sth->errstr() );
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while( my $monitor = $sth->fetchrow_hashref() )
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{
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next if ( !zmShmVerify( $monitor ) ); # Check shared memory ok
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if ( defined($monitors{$monitor->{Id}}->{LastState}) )
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{
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$monitor->{LastState} = $monitors{$monitor->{Id}}->{LastState};
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}
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else
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{
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$monitor->{LastState} = zmGetMonitorState( $monitor );
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}
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if ( defined($monitors{$monitor->{Id}}->{LastEvent}) )
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{
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$monitor->{LastEvent} = $monitors{$monitor->{Id}}->{LastEvent};
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}
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else
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{
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$monitor->{LastEvent} = zmGetLastEvent( $monitor );
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}
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$new_monitors{$monitor->{Id}} = $monitor;
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}
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%monitors = %new_monitors;
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}
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sub handleMessage
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{
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my $connection = shift;
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my $message = shift;
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my ( $id, $action, $score, $cause, $text, $showtext ) = split( /\|/, $message );
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$score = 0 if ( !defined($score) );
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$cause = "" if ( !defined($cause) );
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$text = "" if ( !defined($text) );
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my $monitor = $monitors{$id};
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if ( !$monitor )
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{
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Warning( "Can't find monitor '$id' for message '$message'\n" );
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return;
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}
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Debug( "Found monitor for id '$id'\n" );
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next if ( !zmShmVerify( $monitor ) );
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Debug( "Handling action '$action'\n" );
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if ( $action =~ /^(enable|disable)(?:\+(\d+))?$/ )
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{
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my $state = $1;
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my $delay = $2;
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if ( $state eq "enable" )
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{
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zmMonitorEnable( $monitor );
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}
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else
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{
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zmMonitorDisable( $monitor );
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}
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# Force a reload
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$monitor_reload_time = 0;
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Info( "Set monitor to $state\n" );
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if ( $delay )
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{
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my $action_time = time()+$delay;
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my $action_text = $id."|".(($state eq "enable")?"disable":"enable");
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my $action_array = $actions{$action_time};
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if ( !$action_array )
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{
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$action_array = $actions{$action_time} = [];
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}
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push( @$action_array, { connection=>$connection, message=>$action_text } );
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Debug( "Added timed event '$action_text', expires at $action_time (+$delay secs)\n" );
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}
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}
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elsif ( $action =~ /^(on|off)(?:\+(\d+))?$/ )
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{
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next if ( !$monitor->{Enabled} );
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my $trigger = $1;
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my $delay = $2;
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my $trigger_data;
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if ( $trigger eq "on" )
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{
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zmTriggerEventOn( $monitor, $score, $cause, $text );
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zmTriggerShowtext( $monitor, $showtext ) if defined($showtext);
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Info( "Trigger '$trigger' '$cause'\n" );
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}
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elsif ( $trigger eq "off" )
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{
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my $last_event = zmGetLastEvent( $monitor );
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zmTriggerEventOff( $monitor );
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zmTriggerShowtext( $monitor, $showtext ) if defined($showtext);
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Info( "Trigger '$trigger'\n" );
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# Wait til it's finished
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while( zmInAlarm( $monitor ) && ($last_event == zmGetLastEvent( $monitor )) )
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{
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# Tenth of a second
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usleep( 100000 );
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}
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zmTriggerEventCancel( $monitor );
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}
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else
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{
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Info( "Trigger '$trigger'\n" );
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zmTriggerEventCancel( $monitor );
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}
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if ( $delay )
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{
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my $action_time = time()+$delay;
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#my $action_text = $id."|cancel|0|".$cause."|".$text;
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my $action_text = $id."|cancel";
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my $action_array = $actions{$action_time};
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if ( !$action_array )
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{
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$action_array = $actions{$action_time} = [];
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}
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push( @$action_array, { connection=>$connection, message=>$action_text } );
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Debug( "Added timed event '$action_text', expires at $action_time (+$delay secs)\n" );
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}
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}
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elsif( $action eq "cancel" )
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{
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zmTriggerEventCancel( $monitor );
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zmTriggerShowtext( $monitor, $showtext ) if defined($showtext);
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Info( "Cancelled event\n" );
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}
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elsif( $action eq "show" )
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{
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zmTriggerShowtext( $monitor, $showtext );
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Info( "Updated show text to '$showtext'\n" );
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}
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else
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{
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Error( "Unrecognised action '$action' in message '$message'\n" );
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}
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}
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