617 lines
15 KiB
Perl
617 lines
15 KiB
Perl
#!/usr/bin/perl -wT
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#
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# ==========================================================================
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#
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# ZoneMinder Daemon Control Script, $Date$, $Revision$
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# Copyright (C) 2003, 2004, 2005 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 the gateway for controlling the various ZoneMinder
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# daemons. All starting, stopping and restarting goes through here.
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# On the first invocation it starts up a server which subsequently
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# records what's running and what's not. Other invocations just
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# connect to the server and pass instructions to it.
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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 => "zmdc"; # 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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# ==========================================================================
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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 POSIX;
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use Socket;
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use IO::Handle;
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use Data::Dumper;
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use constant DC_SOCK_FILE => ZM_PATH_SOCKS.'/zmdc.sock';
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use constant DC_LOG_FILE => ZM_PATH_LOGS.'/zmdc.log';
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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, DBG_LEVEL );
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my @daemons = ( 'zmc', 'zma', 'zmf', 'zmfilter.pl', 'zmaudit.pl', 'zmtrigger.pl', 'zmx10.pl', 'zmwatch.pl', 'zmupdate.pl', 'zmtrack.pl' );
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my $command = shift @ARGV;
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die( "No command given" ) unless( $command );
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my $needs_daemon = $command !~ /(?:shutdown|status|check)/;
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my $daemon = shift( @ARGV );
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die( "No daemon given" ) unless( !$needs_daemon || $daemon );
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my @args;
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my $daemon_patt = '('.join( '|', @daemons ).')';
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if ( $needs_daemon )
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{
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if ( $daemon =~ /^${daemon_patt}$/ )
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{
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$daemon = $1;
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}
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else
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{
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die( "Invalid daemon '$daemon' specified" );
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}
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}
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foreach my $arg ( @ARGV )
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{
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# Detaint arguments, if they look ok
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#if ( $arg =~ /^(-{0,2}[\w]+)/ )
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if ( $arg =~ /^(-{0,2}[\w\/?&=.-]+)$/ )
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{
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push( @args, $1 );
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}
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else
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{
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die( "Bogus argument '$arg' found" );
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}
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}
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socket( CLIENT, PF_UNIX, SOCK_STREAM, 0 ) or die( "Can't open socket: $!" );
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my $saddr = sockaddr_un( DC_SOCK_FILE );
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if ( !connect( CLIENT, $saddr ) )
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{
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if ( $command eq "check" )
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{
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print( "stopped\n" );
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exit();
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}
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# The server isn't there
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print( "Unable to connect, starting server\n" );
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close( CLIENT );
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if ( my $cpid = fork() )
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{
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# Parent process just sleep and fall through
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socket( CLIENT, PF_UNIX, SOCK_STREAM, 0 ) or die( "Can't open socket: $!" );
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my $attempts = 0;
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while (!connect( CLIENT, $saddr ))
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{
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$attempts++;
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die( "Can't connect: $!" ) if ($attempts > MAX_CONNECT_DELAY);
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sleep(1);
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}
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}
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elsif ( defined($cpid) )
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{
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setpgrp();
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open( LOG, ">>".DC_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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dprint( "Server starting at ".strftime( '%y/%m/%d %H:%M:%S', localtime() )."\n" );
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kill_all( 1 );
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socket( SERVER, PF_UNIX, SOCK_STREAM, 0 ) or Fatal( "Can't open socket: $!" );
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unlink( DC_SOCK_FILE );
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bind( SERVER, $saddr ) or Fatal( "Can't bind: $!" );
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listen( SERVER, SOMAXCONN ) or Fatal( "Can't listen: $!" );
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$SIG{CHLD} = \&reaper;
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$SIG{INT} = \&shutdown_all;
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$SIG{TERM} = \&shutdown_all;
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$SIG{ABRT} = \&shutdown_all;
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$SIG{HUP} = \&status;
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my %cmd_hash;
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my %pid_hash;
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sub cprint
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{
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if ( fileno(CLIENT) )
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{
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print CLIENT @_
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}
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}
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sub dprint
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{
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if ( fileno(CLIENT) )
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{
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print CLIENT @_
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}
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Info( @_ );
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}
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sub start
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{
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my $daemon = shift;
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my @args = @_;
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my $command = $daemon;
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$command .= ' '.join( ' ', ( @args ) ) if ( @args );
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my $process = $cmd_hash{$command};
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if ( !$process )
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{
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# It's not running, or at least it's not been started by us
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$process = { daemon=>$daemon, args=>\@args, command=>$command, keepalive=>!undef };
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}
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elsif ( $process->{pid} && $pid_hash{$process->{pid}} )
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{
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dprint( "'$process->{command}' already running at ".strftime( '%y/%m/%d %H:%M:%S', localtime( $process->{started}) ).", pid = $process->{pid}\n" );
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return();
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}
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if ( my $cpid = fork() )
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{
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my $sigset = POSIX::SigSet->new;
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my $blockset = POSIX::SigSet->new( SIGCHLD );
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sigprocmask( SIG_BLOCK, $blockset, $sigset ) or Fatal( "Can't block SIGCHLD: $!" );
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$process->{pid} = $cpid;
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$process->{started} = time();
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delete( $process->{pending} );
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dprint( "'$command' starting at ".strftime( '%y/%m/%d %H:%M:%S', localtime( $process->{started}) ).", pid = $process->{pid}\n" );
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$cmd_hash{$process->{command}} = $pid_hash{$cpid} = $process;
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sigprocmask( SIG_SETMASK, $sigset ) or Fatal( "Can't restore SIGCHLD: $!" );
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}
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elsif ( defined($cpid ) )
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{
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# Child process
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$SIG{CHLD} = 'DEFAULT';
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$SIG{INT} = 'DEFAULT';
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$SIG{TERM} = 'DEFAULT';
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$SIG{ABRT} = 'DEFAULT';
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$SIG{HUP} = 'DEFAULT';
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dprint( "'".join( ' ', ( $daemon, @args ) )."' started at ".strftime( '%y/%m/%d %H:%M:%S', localtime() )."\n" );
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if ( $daemon =~ /^${daemon_patt}$/ )
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{
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$daemon = ZM_PATH_BIN.'/'.$1;
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}
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else
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{
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Fatal( "Invalid daemon '$daemon' specified" );
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}
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my @good_args;
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foreach my $arg ( @args )
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{
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# Detaint arguments, if they look ok
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if ( $arg =~ /^(-{0,2}[\w\/?&=.-]+)$/ )
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{
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push( @good_args, $1 );
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}
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else
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{
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Fatal( "Bogus argument '$arg' found" );
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}
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}
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exec( $daemon, @good_args ) or Fatal( "Can't exec: $!" );
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}
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else
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{
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Fatal( "Can't fork: $!" );
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}
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}
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sub _stop
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{
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my $final = shift;
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my $daemon = shift;
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my @args = @_;
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my $command = $daemon;
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$command .= ' '.join( ' ', ( @args ) ) if ( @args );
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my $process = $cmd_hash{$command};
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if ( !$process )
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{
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dprint( "Can't find process with command of '$command'\n" );
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return();
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}
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elsif ( $process->{pending} )
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{
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delete( $cmd_hash{$command} );
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dprint( "Command '$command' removed from pending list at ".strftime( '%y/%m/%d %H:%M:%S', localtime() )."\n" );
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return();
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}
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my $cpid = $process->{pid};
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if ( !$pid_hash{$cpid} )
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{
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dprint( "No process with command of '$command' is running\n" );
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return();
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}
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print( "'$daemon ".join( ' ', @args )."' stopping at ".strftime( '%y/%m/%d %H:%M:%S', localtime() )."\n" );
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$process->{keepalive} = !$final;
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kill( 'TERM', $cpid );
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delete( $cmd_hash{$command} );
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# Now check it has actually gone away, if not kill -9 it
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my $count = 0;
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while( $cpid && kill( 0, $cpid ) )
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{
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if ( $count++ > 5 )
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{
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kill( 'KILL', $cpid );
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}
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sleep( 1 );
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}
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}
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sub stop
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{
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_stop( 1, @_ );
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}
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sub restart
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{
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my $daemon = shift;
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my @args = @_;
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my $command = $daemon;
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$command .= ' '.join( ' ', ( @args ) ) if ( @args );
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my $process = $cmd_hash{$command};
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if ( $process )
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{
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if ( $process->{pid} )
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{
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my $cpid = $process->{pid};
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if ( defined($pid_hash{$cpid}) )
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{
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_stop( 0, $daemon, @args );
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return;
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}
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}
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}
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start( $daemon, @args );
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}
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sub reaper
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{
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my $saved_status = $!;
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while ( (my $cpid = waitpid( -1, WNOHANG )) > 0 )
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{
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my $status = $?;
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my $process = $pid_hash{$cpid};
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delete( $pid_hash{$cpid} );
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if ( !$process )
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{
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dprint( "Can't find child with pid of '$cpid'\n" );
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next;
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}
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$process->{stopped} = time();
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$process->{runtime} = ($process->{stopped}-$process->{started});
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delete( $process->{pid} );
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my $exit_status = $status>>8;
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my $exit_signal = $status&0xfe;
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my $core_dumped = $status&0x01;
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my $out_str = "'$process->{daemon} ".join( ' ', @{$process->{args}} )."' ";
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$out_str .= ($exit_status==0)?"died":"crashed";
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$out_str .= ", exit status $exit_status" if ( $exit_status );
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$out_str .= ", signal $exit_signal" if ( $exit_signal );
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#print( ", core dumped" ) if ( $core_dumped );
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$out_str .= "\n";
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if ( $exit_status == 0 )
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{
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Info( $out_str );
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}
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else
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{
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Error( $out_str );
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}
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if ( $process->{keepalive} )
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{
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if ( !$process->{delay} || ($process->{runtime} > (10*$process->{delay})) )
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{
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#start( $process->{daemon}, @{$process->{args}} );
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# Schedule for immediate restart
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$cmd_hash{$process->{command}} = $process;
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$process->{pending} = $process->{stopped};
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$process->{delay} = 5;
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}
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else
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{
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$cmd_hash{$process->{command}} = $process;
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$process->{pending} = $process->{stopped}+$process->{delay};
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$process->{delay} *= 2;
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# Limit the start delay to 15 minutes max
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if ( $process->{delay} > ZM_MAX_RESTART_DELAY )
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{
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$process->{delay} = ZM_MAX_RESTART_DELAY;
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}
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}
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}
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}
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$SIG{CHLD} = \&reaper;
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$! = $saved_status;
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}
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sub kill_all
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{
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my $delay = shift;
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sleep( $delay );
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foreach my $daemon ( @daemons )
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{
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qx( killall --quiet --signal TERM $daemon );
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}
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sleep( $delay );
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foreach my $daemon ( @daemons )
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{
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qx( killall --quiet --signal KILL $daemon );
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}
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}
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sub restart_pending
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{
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# Restart any pending processes
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foreach my $process ( values( %cmd_hash ) )
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{
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if ( $process->{pending} && $process->{pending} <= time() )
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{
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dprint( "Starting pending process, $process->{command}\n" );
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start( $process->{daemon}, @{$process->{args}} );
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}
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}
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}
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sub shutdown_all()
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{
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foreach my $process ( values( %pid_hash ) )
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{
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stop( $process->{daemon}, @{$process->{args}} );
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}
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kill_all( 5 );
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dprint( "Server shutdown at ".strftime( '%y/%m/%d %H:%M:%S', localtime() )."\n" );
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unlink( DC_SOCK_FILE );
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close( CLIENT );
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close( SERVER );
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exit();
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}
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sub check
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{
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my $daemon = shift;
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my @args = @_;
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my $command = $daemon;
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$command .= ' '.join( ' ', ( @args ) ) if ( @args );
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my $process = $cmd_hash{$command};
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if ( !$process )
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{
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cprint( "unknown\n" );
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}
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elsif ( $process->{pending} )
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{
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cprint( "pending\n" );
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}
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else
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{
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my $cpid = $process->{pid};
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if ( !$pid_hash{$cpid} )
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{
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cprint( "stopped\n" );
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}
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else
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{
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cprint( "running\n" );
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}
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}
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}
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sub status
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{
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my $daemon = shift;
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my @args = @_;
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if ( defined($daemon) )
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{
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my $command = $daemon;
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$command .= ' '.join( ' ', ( @args ) ) if ( @args );
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my $process = $cmd_hash{$command};
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if ( !$process )
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{
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dprint( "'$command' not running\n" );
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return();
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}
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if ( $process->{pending} )
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{
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dprint( "'$process->{command}' pending at ".strftime( '%y/%m/%d %H:%M:%S', localtime( $process->{pending}) )."\n" );
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}
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else
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{
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my $cpid = $process->{pid};
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if ( !$pid_hash{$cpid} )
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{
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dprint( "'$command' not running\n" );
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return();
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}
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}
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dprint( "'$process->{command}' running since ".strftime( '%y/%m/%d %H:%M:%S', localtime( $process->{started}) ).", pid = $process->{pid}" );
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}
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else
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{
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foreach my $process ( values(%pid_hash) )
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{
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my $out_str = "'$process->{command}' running since ".strftime( '%y/%m/%d %H:%M:%S', localtime( $process->{started}) ).", pid = $process->{pid}";
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$out_str .= ", valid" if ( kill( 0, $process->{pid} ) );
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$out_str .= "\n";
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dprint( $out_str );
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}
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foreach my $process ( values( %cmd_hash ) )
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{
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if ( $process->{pending} )
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{
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dprint( "'$process->{command}' pending at ".strftime( '%y/%m/%d %H:%M:%S', localtime( $process->{pending}) )."\n" );
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}
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}
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}
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}
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my $rin = '';
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vec( $rin, fileno(SERVER), 1 ) = 1;
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my $win = $rin;
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my $ein = $win;
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my $timeout = 1;
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while( 1 )
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{
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my $nfound = select( my $rout = $rin, undef, undef, $timeout );
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if ( $nfound > 0 )
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{
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if ( vec( $rout, fileno(SERVER), 1 ) )
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{
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my $paddr = accept( CLIENT, SERVER );
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my $message = <CLIENT>;
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next if ( !$message );
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my ( $command, $daemon, @args ) = split( ';', $message );
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if ( $command eq 'start' )
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{
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start( $daemon, @args );
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}
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elsif ( $command eq 'stop' )
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{
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stop( $daemon, @args );
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}
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elsif ( $command eq 'restart' )
|
|
{
|
|
restart( $daemon, @args );
|
|
}
|
|
elsif ( $command eq 'shutdown' )
|
|
{
|
|
shutdown_all();
|
|
}
|
|
elsif ( $command eq 'check' )
|
|
{
|
|
check( $daemon, @args );
|
|
}
|
|
elsif ( $command eq 'status' )
|
|
{
|
|
if ( $daemon )
|
|
{
|
|
status( $daemon, @args );
|
|
}
|
|
else
|
|
{
|
|
status();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dprint( "Invalid command '$command'\n" );
|
|
}
|
|
close( CLIENT );
|
|
}
|
|
else
|
|
{
|
|
Fatal( "Bogus descriptor" );
|
|
}
|
|
}
|
|
elsif ( $nfound < 0 )
|
|
{
|
|
print( "Got: $nfound - $!\n" );
|
|
if ( $! == EINTR )
|
|
{
|
|
# Dead child, will be reaped
|
|
#print( "Probable dead child\n" );
|
|
# See if it needs to start up again
|
|
restart_pending();
|
|
}
|
|
elsif ( $! == EPIPE )
|
|
{
|
|
Error( "Can't select: $!" );
|
|
}
|
|
else
|
|
{
|
|
Fatal( "Can't select: $!" );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
#print( "Select timed out\n" );
|
|
restart_pending();
|
|
}
|
|
}
|
|
dprint( "Server exiting at ".strftime( '%y/%m/%d %H:%M:%S', localtime() )."\n" );
|
|
close( LOG );
|
|
exit();
|
|
}
|
|
else
|
|
{
|
|
Fatal( "Can't fork: $!" );
|
|
}
|
|
}
|
|
if ( $command eq "check" && !$daemon )
|
|
{
|
|
print( "running\n" );
|
|
exit();
|
|
}
|
|
# The server is there, connect to it
|
|
#print( "Writing commands\n" );
|
|
CLIENT->autoflush();
|
|
my $message = "$command";
|
|
$message .= ";$daemon" if ( $daemon );
|
|
$message .= ";".join( ';', @args ) if ( @args );
|
|
print( CLIENT $message );
|
|
shutdown( CLIENT, 1 );
|
|
while ( my $line = <CLIENT> )
|
|
{
|
|
chomp( $line );
|
|
print( "$line\n" );
|
|
}
|
|
close( CLIENT );
|
|
#print( "Finished writing, bye\n" );
|