#!/bin/bash
#
# plc	Manages all PLC services on this machine
#
# chkconfig: 2345 99 5
#
# description:	Manages all PLC services on this machine
#
# $Id$
#

PATH=/sbin:/bin:/usr/bin:/usr/sbin

# Source function library.
if [ -f /etc/init.d/functions ] ; then
    . /etc/init.d/functions
fi

# If success() or failure() are not defined
if ! type -type success >/dev/null || ! type -type failure >/dev/null ; then
    success() {
	echo -ne "[  OK  ]\r"
	return 0
    }
    failure() {
	echo -ne "[FAILED]\r"
	return 1
    }
fi

# Source configuration
SERVICE=$(basename $0)
if [ ! -f /etc/sysconfig/$SERVICE ] ; then
    SERVICE=plc
fi
if [ -f /etc/sysconfig/$SERVICE -a -z "${PLC_ROOT}${PLC_DATA}" ] ; then
    . /etc/sysconfig/$SERVICE
fi

# Total number of errors
ERRORS=0

# Count the exit status of the last command
check ()
{
    ERRORS=$(($ERRORS+$?))
}

mounted ()
{
    if cut -d' ' -f2 /proc/mounts | grep -q "$1" ; then
	return 0
    else
	return 1
    fi
}

mount_plc ()
{
    echo -n $"Mounting PLC: "

    if ! mounted $PLC_ROOT ; then
	if ! e2fsck -a $PLC_ROOT.img | logger -t "PLC" ; then
	    e2fsck $PLC_ROOT.img
	fi
	mount -o loop $PLC_ROOT.img $PLC_ROOT
	check
    fi
    if ! mounted $PLC_ROOT/data ; then
	mount -t none -o bind,rw $PLC_DATA $PLC_ROOT/data
	check
    fi
    if [ -d /data/fedora ] ; then
      if ! mounted $PLC_ROOT/data/fedora ; then
	mount -t none -o bind,ro /data/fedora $PLC_ROOT/data/fedora 
	check
      fi
    fi
    if [ -d /svn ] ; then
      if ! mounted $PLC_ROOT/svn ; then
	mount -t none -o bind,ro /svn $PLC_ROOT/svn 
	check
      fi
    fi
    if ! mounted $PLC_ROOT/proc ; then
	mount -t proc none $PLC_ROOT/proc
	check
    fi

    [ $ERRORS -eq 0 ] && success $"PLC unmount" || failure $"PLC unmount"	
    echo

}

start ()
{
    # Starting everything
    if [ -z "$1" ] ; then
	mount_plc 
    fi

    chroot $PLC_ROOT /sbin/service plc $PLC_OPTIONS start $*
    check
}

umount_plc ()
{
    echo -n $"Unmounting PLC: "

    for dir in $PLC_ROOT/proc $PLC_ROOT/svn $PLC_ROOT/data/fedora $PLC_ROOT/data $PLC_ROOT ; do
	if mounted $dir ; then
	    umount $dir
	    check
	fi
    done

    [ $ERRORS -eq 0 ] && success $"PLC unmount" || failure $"PLC unmount"	
    echo
}

stop ()
{
    if mounted $PLC_ROOT ; then
	chroot $PLC_ROOT /sbin/service plc $PLC_OPTIONS stop $*
	check
    fi

    # Stopped everything
    if [ -z "$1" ] ; then
	umount_plc
    fi
}

mountstatus_plc ()
{
    for dir in $PLC_ROOT/proc $PLC_ROOT/svn $PLC_ROOT/data/fedora $PLC_ROOT/data $PLC_ROOT ; do
	if mounted $dir ; then
	    echo $dir
	fi
    done
}

# Get command
shift $(($OPTIND - 1))
command=$1

# Get step(s)
shift 1

case "$command" in
    start|stop)
	$command $*
	;;

    restart)
	stop $*
	start $*
	;;

    reload)
	chroot $PLC_ROOT /sbin/service plc $PLC_OPTIONS reload $*
	;;	

    mount|umount|mountstatus)
        ${command}_plc $*
	;;
  
    *)
	echo "Usage: $0 {start|stop|restart|reload|mount|umount|mountstatus}"
	RETVAL=1
	;;
esac

exit $ERRORS