#!/bin/sh
#----------------------------------------------------------------------------
# /etc/init.d/lvm-monitor - lvm-monitor start script
#
# Creation   :  2009-04-21 holbru
# Last update:  $Id$
#
# Copyright (c) 2001-@@YEAR@@ the eisfair team, team(at)eisfair(dot)org>
#
# 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.
#----------------------------------------------------------------------------
#
# ln -s /etc/init.d/lvm-monitor /etc/rc2.d/S05clvm-monitor
# ln -s /etc/init.d/lvm-monitor /etc/rc2.d/K95alvm-monitor
#

. /etc/init.d/functions

DAEMON=lvm-monitor

exec_prefix=/usr
sbindir=/usr/sbin

VGCHANGE=${sbindir}/vgchange
VGS=${sbindir}/vgs

LOCK_FILE="/var/lock/subsys/${DAEMON}"

# ---------------------------------------------------------------------------
# usage
# ---------------------------------------------------------------------------
usage()
{
cat <<EOF

 Usage:
 ${0}
                -q, --quiet      suppress all normal output
                [start]
                [stop]
                [restart]
EOF
}

# ---------------------------------------------------------------------------
# start lvm-monitor
# ---------------------------------------------------------------------------
lvm_monitor_start()
{
    if [ ! -f "${LOCK_FILE}" ]
    then
        ret=0
	    # TODO do we want to separate out already active groups only?
	    VGSLIST=$(${VGS} --noheadings -o name 2> /dev/null)
	    for vg in ${VGSLIST}
  	    do
	        boot_mesg " * Starting monitoring for VG ${vg}:" 
            loadproc  ${VGCHANGE} --monitor y --poll y ${vg}  
            ret=${?} 
	    done
    
        return ${ret}
    fi 
}

# ---------------------------------------------------------------------------
# stop lvm-monitor
# ---------------------------------------------------------------------------
lvm_monitor_stop()
{
    if [ -f "${LOCK_FILE}" ]
    then
        ret=0
	    # TODO do we want to separate out already active groups only?
	    VGSLIST=$(${VGS} --noheadings -o name 2> /dev/null)
	    for vg in ${VGSLIST}
	    do
	        boot_mesg " *Stopping monitoring for VG ${vg}:" 
            loadproc ${VGCHANGE} --monitor n ${vg} 
            ret=${?} 
	    done

        return ${ret}
    fi
}

# ---------------------------------------------------------------------------
# main
# ---------------------------------------------------------------------------

rtrn=1

while [ "${#}" -gt 0 ]
do
    case "${1}" in
    -q|--quiet)
        _quiet=true
        shift
        ;;
    *)
        _action="${1}"
        shift
        ;;
    esac
done

case "${_action}" in
    start)
	    lvm_monitor_start
	    rtrn=${?}
	    if [ ${rtrn:-1} -eq 0 ] 
        then
            touch ${LOCK_FILE}
        fi
 	;;
    stop)
	    lvm_monitor_stop
        rtrn=${?}
        if [ ${rtrn:-1} -eq 0 ] 
        then 
            rm -f ${LOCK_FILE}
        fi
  	;;
    restart)
	    if lvm_monitor_stop
	    then
		    lvm_monitor_start
	    fi 
	    rtrn=${?}
	;;
    *)
	  usage  
	;;
esac

exit ${rtrn}
# ---------------------------------------------------------------------------
# end
# ---------------------------------------------------------------------------