#!/usr/bin/perl -wT
#
# ==========================================================================
#
# ZoneMinder Package Control Script, $Date$, $Revision$
# Copyright (C) 2001-2008 Philip Coombes
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# ==========================================================================

=head1 NAME

zmpkg.pl - ZoneMinder Package Control Script

=head1 SYNOPSIS

 zmpkg.pl {start|stop|restart|status|logrot|'state'|version}

=head1 DESCRIPTION

This script is used to start and stop the ZoneMinder package primarily to
allow command line control for automatic restart on reboot (see zm script)

=cut
use strict;
use bytes;

# ==========================================================================
#
# Don't change anything below here
#
# ==========================================================================

# Include from system perl paths only
use ZoneMinder;
use DBI;
use POSIX;
use Time::HiRes qw/gettimeofday/;
use autouse 'Pod::Usage'=>qw(pod2usage);

# Detaint our environment
$ENV{PATH}  = '/bin:/usr/bin:/usr/local/bin';
$ENV{SHELL} = '/bin/sh' if exists $ENV{SHELL};
delete @ENV{qw(IFS CDPATH ENV BASH_ENV)};
my $store_state=""; # PP - will remember state name passed

logInit();

my $command = $ARGV[0]||'';
if ( $command eq 'version' ) {
    print ZoneMinder::Base::ZM_VERSION . "\n";
    exit(0);
}

my $state;

my $dbh;

if ( !$command || $command !~ /^(?:start|stop|restart|status|logrot|version)$/ )
{
    if ( $command )
    {
        $dbh = zmDbConnect();
        # Check to see if it's a valid run state
        my $sql = 'select * from States where Name = ?';
        my $sth = $dbh->prepare_cached( $sql )
            or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
        my $res = $sth->execute( $command )
            or Fatal( "Can't execute: ".$sth->errstr() );
        if ( $state = $sth->fetchrow_hashref() )
        {
            $state->{Name} = $command;
            $state->{Definitions} = [];
            foreach( split( /,/, $state->{Definition} ) )
            {
                my ( $id, $function, $enabled ) = split( /:/, $_ );
                push( @{$state->{Definitions}},
                      { Id=>$id, Function=>$function, Enabled=>$enabled }
                );
            }
 	    $store_state=$command; # PP - Remember the name that was passed to search in DB
            $command = 'state';
        }
        else
        {
            $command = undef;
        }
    }
    if ( !$command )
    {
        pod2usage(-exitstatus => -1);
    }
}
$dbh = zmDbConnect() if ! $dbh;
# PP - Sane state check
isActiveSanityCheck();

# Move to the right place
chdir( $Config{ZM_PATH_WEB} )
    or Fatal( "Can't chdir to '".$Config{ZM_PATH_WEB}."': $!" );

my $dbg_id = "";

Info( "Command: $command\n" );

my $retval = 0;

if ( $command eq "state" )
{
    Info( "Updating DB: $state->{Name}\n" );
    my $sql = $Config{ZM_SERVER_ID} ? 'SELECT * FROM Monitors WHERE ServerId=? ORDER BY Id ASC' : 'SELECT * FROM Monitors ORDER BY Id ASC';
    my $sth = $dbh->prepare_cached( $sql )
        or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
    my $res = $sth->execute( $Config{ZM_SERVER_ID} ? $Config{ZM_SERVER_ID}: () )
        or Fatal( "Can't execute: ".$sth->errstr() );
    while( my $monitor = $sth->fetchrow_hashref() )
    {
        foreach my $definition ( @{$state->{Definitions}} )
        {
            if ( $monitor->{Id} =~ /^$definition->{Id}$/ )
            {
                $monitor->{NewFunction} = $definition->{Function};
                $monitor->{NewEnabled} = $definition->{Enabled};
            }
        }
        #next if ( !$monitor->{NewFunction} );
        $monitor->{NewFunction} = 'None'
            if ( !$monitor->{NewFunction} );
        $monitor->{NewEnabled} = 0
            if ( !$monitor->{NewEnabled} );
        if ( $monitor->{Function} ne $monitor->{NewFunction}
             || $monitor->{Enabled} ne $monitor->{NewEnabled}
        )
        {
            my $sql = "update Monitors set Function = ?, Enabled = ? where Id = ?";
            my $sth = $dbh->prepare_cached( $sql )
                or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
            my $res = $sth->execute( $monitor->{NewFunction}, $monitor->{NewEnabled}, $monitor->{Id} )
                or Fatal( "Can't execute: ".$sth->errstr() );
        }
    }
    $sth->finish();
      
    # PP - Now mark a specific state as active
    resetStates();
    Info ("Marking $store_state as Enabled");
    $sql = "update States set IsActive = '1' where Name = ?";
    $sth = $dbh->prepare_cached( $sql )
         or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
    $res = $sth->execute( $store_state )
         or Fatal( "Can't execute: ".$sth->errstr() );

    # PP - zero out other states isActive
    $command = "restart";
}

# Check if we are running systemd and if we have been called by the system
if ( $command =~ /^(start|stop|restart)$/ )
{
    # We have to detaint to keep perl from complaining
    $command = $1;


    if ( systemdRunning() && !calledBysystem() ) {
        qx(/usr/bin/zmsystemctl.pl $command);
        $command = "";
    }
}

if ( $command =~ /^(?:stop|restart)$/ )
{
    my $status = runCommand( "zmdc.pl check" );

    if ( $status eq "running" )
    {
        runCommand( "zmdc.pl shutdown" );
        zmMemTidy();
    }
    else
    {
        $retval = 1;
    }
}

#runCommand( "zmupdate.pl -f" );

if ( $command =~ /^(?:start|restart)$/ )
{
    my $status = runCommand( "zmdc.pl check" );

    if ( $status eq "stopped" )
    {
        if ( $Config{ZM_DYN_DB_VERSION}
             and ( $Config{ZM_DYN_DB_VERSION} ne ZM_VERSION )
        )
        {
            Fatal( "Version mismatch, system is version ".ZM_VERSION
                   .", database is ".$Config{ZM_DYN_DB_VERSION}
                   .", please run zmupdate.pl to update."
            );
            exit( -1 );
        }

        # Recreate the temporary directory if it's been wiped
        verifyFolder("/var/lib/zoneminder/temp");

        # Recreate the run directory if it's been wiped
        verifyFolder("/run/zoneminder");

        # Recreate the sock directory if it's been wiped
        verifyFolder("/data/srv/zoneminder/sock");

        zmMemTidy();
        runCommand( "zmdc.pl startup" );

        if ( $Config{ZM_SERVER_ID} ) {
            Info( "Multi-server configuration detected. Starting up services for server $Config{ZM_SERVER_ID}\n");
        } else {
            Info( "Single server configuration detected. Starting up services." );
        }

        my $sql = $Config{ZM_SERVER_ID} ? 'SELECT * FROM Monitors WHERE ServerId=?' : 'SELECT * FROM Monitors';
        my $sth = $dbh->prepare_cached( $sql )
            or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
        my $res = $sth->execute( $Config{ZM_SERVER_ID} ? $Config{ZM_SERVER_ID} : () )
            or Fatal( "Can't execute: ".$sth->errstr() );
        while( my $monitor = $sth->fetchrow_hashref() )
        {
            if ( $monitor->{Function} ne 'None' )
            {
                if ( $monitor->{Type} eq 'Local' )
                {
                    runCommand( "zmdc.pl start zmc -d $monitor->{Device}" );
                }
                else
                {
                    runCommand( "zmdc.pl start zmc -m $monitor->{Id}" );
                }
                if ( $monitor->{Function} ne 'Monitor' )
                {
                    if ( $Config{ZM_OPT_FRAME_SERVER} )
                    {
                        runCommand( "zmdc.pl start zmf -m $monitor->{Id}" );
                    }
                    runCommand( "zmdc.pl start zma -m $monitor->{Id}" );
                }
                if ( $Config{ZM_OPT_CONTROL} )
                {
                    if ( $monitor->{Function} eq 'Modect' || $monitor->{Function} eq 'Mocord' )
                    {
                        if ( $monitor->{Controllable} && $monitor->{TrackMotion} )
                        {
                            runCommand( "zmdc.pl start zmtrack.pl -m $monitor->{Id}" );
                        }
                    }
                }
            }
        }
        $sth->finish();

        # This is now started unconditionally
        runCommand( "zmdc.pl start zmfilter.pl" );
        if ( $Config{ZM_RUN_AUDIT} )
        {
            runCommand( "zmdc.pl start zmaudit.pl -c" );
        }
        if ( $Config{ZM_OPT_TRIGGERS} )
        {
            runCommand( "zmdc.pl start zmtrigger.pl" );
        }
        if ( $Config{ZM_OPT_X10} )
        {
            runCommand( "zmdc.pl start zmx10.pl -c start" );
        }
        runCommand( "zmdc.pl start zmwatch.pl" );
        if ( $Config{ZM_CHECK_FOR_UPDATES} )
        {
            runCommand( "zmdc.pl start zmupdate.pl -c" );
        }
        if ( $Config{ZM_TELEMETRY_DATA} )
        {
            runCommand( "zmdc.pl start zmtelemetry.pl" );
        }
    }
    else
    {
        $retval = 1;
    }
}

if ( $command eq "status" )
{
    my $status = runCommand( "zmdc.pl check" );

    print( STDOUT $status."\n" );
}

if ( $command eq "logrot" )
{
    runCommand( "zmdc.pl logrot" );
}

exit( $retval );

# PP - Make sure isActive is on and only one
sub isActiveSanityCheck
{

	Info ("Sanity checking States table...");
	$dbh = zmDbConnect() if ! $dbh;
	
	# PP - First, make sure default exists and there is only one
	my $sql = "select Name from States where Name = 'default'";
        my $sth = $dbh->prepare_cached( $sql )
                or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
        my $res = $sth->execute()
                or Fatal( "Can't execute: ".$sth->errstr() );

	if ($sth->rows != 1) # PP - no row, or too many rows. Either case is an error
	{
		Info( "Fixing States table - either no default state or duplicate default states" );
		$sql = "delete from States where Name = 'default'";
       		$sth = $dbh->prepare_cached( $sql )
             		or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
                $res = $sth->execute()
               		or Fatal( "Can't execute: ".$sth->errstr() );
		$sql = "insert into States (Name,Definition,IsActive) VALUES ('default','','1');";
       		$sth = $dbh->prepare_cached( $sql )
               		or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
                $res = $sth->execute()
                	or Fatal( "Can't execute: ".$sth->errstr() );
	}	


	# PP - Now make sure no two states have IsActive=1
        $sql = "select Name from States where IsActive = '1'";
        $sth = $dbh->prepare_cached( $sql )
                or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
        $res = $sth->execute()
                or Fatal( "Can't execute: ".$sth->errstr() );

        if ( $sth->rows != 1 )
	{
		Info( "Fixing States table so only one run state is active" );
		resetStates();
		$sql = "update States set IsActive='1' WHERE Name='default'";
        	$sth = $dbh->prepare_cached( $sql )
        	        or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
                $res = $sth->execute()
               		or Fatal( "Can't execute: ".$sth->errstr() );


	}
}


# PP - zeroes out isActive for all states
sub resetStates
{
        $dbh = zmDbConnect() if ! $dbh;
        my $sql = "update States set IsActive = '0'";
        my $sth = $dbh->prepare_cached( $sql )
                or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
        my $res = $sth->execute()
                or Fatal( "Can't execute: ".$sth->errstr() );

}

sub systemdRunning
{
    my $result = 0;

    my $output = qx(ps -o comm="" -p 1);
    chomp( $output );

    if ($output =~ /systemd/) {
        $result = 1;
    }

    return $result;
}

sub calledBysystem
{
    my $result = 0;
    my $ppid = getppid();

    my $output = qx(ps -o comm="" -p $ppid);
    chomp( $output );

    if ($output =~ /^(?:systemd|init)$/) {
        $result = 1;
    }

    return $result;
}

sub verifyFolder
{
    my $folder = shift;

        # Recreate the temporary directory if it's been wiped
        if ( !-e $folder )
        {
            Debug( "Recreating directory '$folder'" );
            mkdir( "$folder", 0774 )
                or Fatal( "Can't create missing temporary directory '$folder': $!" );
            my ( $runName ) = getpwuid( $> );
            if ( $runName ne $Config{ZM_WEB_USER} )
            {
                # Not running as web user, so should be root in which case
                # chown the directory
                my ( $webName, $webPass, $webUid, $webGid ) = getpwnam( $Config{ZM_WEB_USER} )
                    or Fatal( "Can't get user details for web user '"
                              .$Config{ZM_WEB_USER}."': $!"
                       );
                chown( $webUid, $webGid, "$folder" )
                    or Fatal( "Can't change ownership of directory '$folder' to '"
                              .$Config{ZM_WEB_USER}.":".$Config{ZM_WEB_GROUP}."': $!"
                       );
            }
        }
}
__END__
