#!/bin/sh
#
# template	Set sysfs variables from /etc/sysfs.conf
#
# chkconfig: 2345 33 67
# description:	Set sysfs variables from /etc/sysfs.conf
# config: /etc/sysfs.conf

# Do not load RH compatibility interface.
WITHOUT_RC_COMPAT=1

# Source function library.
. /etc/init.d/functions

CONFIG=/etc/sysfs.conf
LOCKFILE=/var/lock/subsys/sysfs
RETVAL=0

[ -s "$CONFIG" -a -r "$CONFIG" ] || exit 0

config_error () {
	local lineno="$1" && shift
	echo "$CONFIG:$lineno: $*" >&2
}

apply_sysfs_rules () {
	local lineno=0 ret=0

	echo -n "Setting sysfs variables..."

	while read f1 f2 f3 f4; do
		lineno=$(( $lineno + 1 ))

		# Skip empty lines
		[ -z "$f1$f2$f3$f4" ] && continue
		# Skip comments
		[ -n "$f1" -a -z "${f1##\#*}" ] && continue

		case "$f1,$f2,$f3,$f4" in
			mode,?*,=,?*)
				if [ -f "/sys/$f2" ]; then
					chmod "$f4" "/sys/$f2" || ret=1
				else
					echo "Unknown attribute: $f2" >&2
				fi
				;;

			owner,?*,=,?*)
				if [ -f "/sys/$f2" ]; then
					chown "$f4" "/sys/$f2" || ret=1
				else
					echo "Unknown attribute: $f2" >&2
				fi
				;;
				
			?*,=,?*,)
				if [ -f "/sys/$f1" ]; then
					# Some fields need a terminating newline, others
					# need the terminating newline to be absent :-(
					echo -n "$f3" > "/sys/$f1" ||
						echo "$f3" > "/sys/$f1" ||
						ret=1
				else
					echo "Unknown attribute: $f1" >&2
				fi
				;;

			*,*,*,*)
				config_error $lineno "Synax error: $f1 $f2 $f3 $f4"
				return 1
				;;
		esac
	done < "$CONFIG"

	return $ret
}

# See how we were called.
case "$1" in
	start|reload|restart)
		apply_sysfs_rules && echo_success || echo_failure
		echo
		RETVAL=$?
		;;
	condrestart|condreload)
		if [ -e "$LOCKFILE" ]; then
			apply_sysfs_rules && echo_success || echo_failure
			echo
			RETVAL=$?
		fi
		;;
	status)
		echo -n "Subsystem was "
		[ -f "$LOCKFILE" ] || echo -n "not "
		echo "activated."
		RETVAL=$?
		;;
	stop|condstop)
		rm -f "$LOCKFILE"
		;;
	*)
		msg_usage "${0##*/} {start|stop|reload|restart|condstop|condrestart|condreload|status}"
		RETVAL=1
esac

exit $RETVAL