#!/bin/sh

# This is for RHEL systems
# chkconfig: 1235 25 25
# description: Scout script to boot time stack the mirror setup devices
# description: chkconfig 1234 25 25 for phase2

# This is for SLES systems
### BEGIN INIT INFO
# Provides: Scout_Boottimemirroring_Phase2
# Required-Start: 
# Required-Stop:
# Default-Start: 1 2 3 5
# Default-Stop:
# Description:   Scout script for setting up boot time mirror configuration-phase2
### END INIT INFO

# This script can be introduced into runlevel directories by just executing this command:
# "chkconfig --add boottimemirroring[_phase?]"
# RHEL chkconfig is a binary executable itself and also behaves well, i.e. the start/stop link numbers remain 92
# SLES chkconfig is a perl wrapper over insserv which is not at all under our control when it comes to link numbers
# TODO - So for SLES we have to use dependency mechanism
# For now, after running chkconfig, rename links to S92 and K92 (TODO)

# Adding bin dirs to PATH for 'sleep' command
PATH=/bin:/sbin:/usr/sbin:/usr/bin:$PATH
export PATH

get_runlevel()
{
    # Check for systemd
    which systemctl > /dev/null 2>&1
    if [ $? -eq 0 ]
    then
        # The 'runlevel' command in systemd works different than
        # sysvinit runlevels. On systemd, the a specific runlevel
        # is only returned when it is reached, while sysvinit would
        # return it as soon as the switch was requested. IOW, runlevel
        # is changed at start in sysv init and at the end by systemd
        # so we cant rely on runlevel command for systemd
        #
        # We check if shutdown.target (common for reboot and poweroff)
        # is currently active to set appropriate runlevel. Current logic
        # does not distinguish between poweroff and reboot and always
        # marks runlevel=0 == poweroff. Similarly, it always returns
        # runlevel=3 == multiuser+nw even for graphical env or single
        # user mode. This needs to be changed if finer distinction is 
        # required.
        #
        systemctl list-units --type=target | grep start | grep -q "shutdown\.target" && RUNLEVEL=0 || RUNLEVEL=3
    else
        # RUNLEVEL variable is set only when this control script is invoked by init
        # Other times, we have to fetch the runlevel ourselves
        RUNLEVEL=${RUNLEVEL:-`/sbin/runlevel | cut -d' ' -f2`}
    fi
}

#SUSE11 DRIVER LD OPTION
if [ -f /etc/SuSE-release ] &&  grep -q 'VERSION = 11' /etc/SuSE-release ; then
        OSN=SLES11
fi

CreateFiltDrvNode()
{
	if lsmod | grep involflt > /dev/null 2>&1 && [ ! -c /dev/involflt ]; then
		local FILTDRVNODE_MAJ_NUM=`cat /proc/devices | grep involflt | cut -d" " -f1`
		mknod /dev/involflt c $FILTDRVNODE_MAJ_NUM 0
	fi
}

case "$1" in

	start)
		echo "Starting boottimemirroring service"
        get_runlevel
		date 2>&1 >> /.boottimemirroring.log
		/etc/vxagent/bin/boottimemirroring.sh 2>&1 > /.boottimemirroring.log.tmp
		cat  /.boottimemirroring.log.tmp >> /.boottimemirroring.log
		RETVAL=$?

        # Touch /var/lock/subsys/boottimemirroring only if the OS is non-debian
        if [ ! -e /etc/debian_version ] ; then
		   [ ! -f /var/lock/subsys/boottimemirroring ] && touch /var/lock/subsys/boottimemirroring
        fi
		;;

	stop)
		echo "Stopping boottimemirroring service"
		RETVAL=0
		;;

	restart)
		echo "Restarting boottimemirroring service"
		RETVAL=$?
		;;

	status)
		echo "Checking status for  boottimemirroring service"
		RETVAL=0
		;;

	*)
		echo "Usage: $0 {start|stop|restart|status}"
		exit 1
		;;
esac

exit $RETVAL