#!/usr/bin/pkexec /usr/bin/perl
#
# ==========================================================================
#
# ZoneMinder systemctl wrapper, $Date$, $Revision$
# 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

zmsystemctl.pl - ZoneMinder systemctl wrapper

=head1 SYNOPSIS

 zmsystemctl.pl {start|stop|restart|version}

=head1 DESCRIPTION

This script allows an unpriveledged user to start, stop, or restart the
zoneminder service on a system running systemd. It does this by redirecting
commands through pkexec, which checks the available polkit policy files. The
default policy file grants the system web account user permission. This can be
changed or expanded by modifying the policy file. See man polkit for details.

=head1 SEE ALSO

polkit(8), pkexec(1)

=cut
use warnings;
use strict;
use bytes;
use autouse 'Pod::Usage'=>qw(pod2usage);

@EXTRA_PERL_LIB@
use ZoneMinder;

my $command = $ARGV[0];

if ( (scalar(@ARGV) == 1)
     && ($command =~ /^(start|stop|restart|version)$/ )
){
    $command = $1;
} else {
    pod2usage(-exitstatus => -1);
}

my $path = qx(which systemctl);
chomp($path);

my $status = $? >> 8;
if ( !$path || $status ) {
    Fatal( "Unable to determine systemctl executable. Is systemd in use?" );
}

Info( "Redirecting command through systemctl\n" );
exec("$path $command zoneminder");