#! /bin/sh -e

### BEGIN INIT INFO
# Provides:          sysfsconf
# Required-Start:    mountkernfs
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      S 0 1 6
# Short-Description: Set sysfs variables from /etc/sysfs.conf
# Description:       Similarly to /etc/init.d/procps.sh, you can configure
#                    values for sysfs variables (such as power management
#                    defaults) and /sys file permissions in /etc/sysfs.conf.
### END INIT INFO

# /etc/init.d/sysfsutils: 
#
# (c) 2005 Martin Pitt <mpitt@debian.org>

CONFFILE=/etc/sysfs.conf

[ -r "$CONFFILE" ] || exit 0

case "$1" in
    start|restart|force-reload)
	echo -n "Setting sysfs variables..."

	sed  's/#.*$//; /^[[:space:]]*$/d; 
              s/^[[:space:]]*\([^=[:space:]]*\)[[:space:]]*\([^=[:space:]]*\)[[:space:]]*=[[:space:]]*\(.*\)/\1 \2 \3/' \
              $CONFFILE | {
	    while read f1 f2 f3; do
                if [ "$f1" = "mode" -a -n "$f2" -a -n "$f3" ]; then
                    if [ -f "/sys/$f2" ]; then
                        chmod "$f3" "/sys/$f2"
                    else
                        echo "unknown attribute $f2"
                    fi
                elif [ "$f1" = "owner" -a -n "$f2" -a -n "$f3" ]; then
                    if [ -f "/sys/$f2" ]; then
                        chown "$f3" "/sys/$f2"
                    else
                        echo "unknown attribute $f2"
                    fi
                elif [ "$f1" -a -n "$f2" -a -z "$f3" ]; then
                    if [ -f "/sys/$f1" ]; then
                        echo -n "$f2" > "/sys/$f1"
                    else
                        echo "unknown attribute $f1"
                    fi
                else
                    echo "syntax error in $CONFFILE: '$f1' '$f2' '$f3'"
                    exit 1
                fi
	    done
	}

	echo "done."
	;;
    stop)
	;;
    *)
	echo "Usage: /etc/init.d/sysfsutils {start|stop|force-reload|restart}"
	exit 1
	;;
esac


