#!/bin/bash
### BEGIN INIT INFO
# Provides:          util-vserver-netns
# Required-Start:    $remote_fs $syslog $time util-vserver
# Required-Stop:     $remote_fs $syslog $time util-vserver
# X-Start-Before:    vservers-default
# X-Stop-After:      vservers-default
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Sets the path to vshelper for netns handling
# Description:       Sets the path to vshelper for netns handling
### END INIT INFO

: ${UTIL_VSERVER_VARS:=/usr/share/util-vserver/netns/util-vserver-vars}
test -e "$UTIL_VSERVER_VARS" || {
    echo $"Can not find util-vserver installation (the file '$UTIL_VSERVER_VARS' would be expected); aborting..." >&2
    exit 1
}
. "$UTIL_VSERVER_VARS"

LOCKFILE=util-vserver-netns
. "$_LIB_VSERVER_INIT_FUNCTIONS"
. "$_LIB_FUNCTIONS"
. "$_LIB_VSERVER_FUNCTIONS"

function start()
{
    _beginResult $"Setting path to vshelper"

    local retval
    if test -r /proc/sys/kernel/vshelper; then
        grep -qv "$_VSHELPER" /proc/sys/kernel/vshelper && \
            cat /proc/sys/kernel/vshelper > "$lockfile.save"

        set_helper
        retval=$?
    else
        retval=1
    fi

    _endResult $retval
    test "$retval" -ne 0 || touch "$lockfile"
    return $retval
}

function stop()
{
    if test -r "$lockfile.save"; then
        _beginResult $"Setting old path to vshelper"
        _VSHELPER="$(cat "$lockfile.save")"
        set_helper
        _endResult $?

        $_RM -f "$lockfile.save"
    fi

    $_RM -f "$lockfile"
}

function restart()
{
    stop
    start
}

case "$1" in
    start|stop|restart)	$1;;
    reload)		;;
    condrestart)
	test -f $lockfile && restart || :
	;;
    status)
	test -f $lockfile && {
	    echo $"Path to vshelper.netns has been set"
	    exit 0
	}
	echo $"Path to vshelper.netns has not been set"
	exit 1
	;;
    *)
        echo "Usage: $0 {start|stop|reload|restart|condrestart|status}"
	exit 2
	;;
esac