#!/bin/sh

# This script is called by "systemctl enable/disable" when the given unit is a

# SysV init.d script. It needs to call the distribution's mechanism for

# enabling/disabling those, such as chkconfig, update-rc.d, or similar. This

# can optionally take a --root argument for enabling a SysV init script

# in a chroot or similar.

set -e

usage() {

    echo "Usage: $0 [--root=path] enable|disable|is-enabled <sysv script name>" >&2

    exit 1

}

# parse options

eval set -- "$(getopt -o r: --long root: -- "$@")"

while true; do

    case "$1" in

        -r|--root)

            ROOT="$2"

            shift 2 ;;

        --) shift ; break ;;

        *) usage ;;

    esac

done

if [ -n "$ROOT" ] && [ "$ROOT" != "/" ]; then

    CHROOT="chroot '$ROOT'"

fi

NAME="$2"

[ -n "$NAME" ] || usage

case "$1" in

    enable)

        # call the command to enable SysV init script $NAME here

        # (consider optional $ROOT)

        $CHROOT /sbin/chkconfig --add $NAME

        ;;

    disable)

        # call the command to disable SysV init script $NAME here

        # (consider optional $ROOT)

        $CHROOT /sbin/chkconfig --del $NAME

        ;;

    is-enabled)

        # exit with 0 if $NAME is enabled, non-zero if it is disabled

        # (consider optional $ROOT)

	ls $ROOT/etc/rc.d/rc[S5].d/S??$NAME >/dev/null 2>/dev/null

        ;;

    *)

        usage ;;

esac