#!/bin/sh /etc/rc.common

START=01
USE_PROCD=1
PROCD_DEBUG=1
NAME=cgroupd

CGBASEDIR=/sys/fs/cgroup
CGCONFIG="cgroups"

DBGLOG=/tmp/cginit.log
DEBUG=0


cgroupinit_set_knob_value () {
	local knob_val=$1
	local dir=$2
	local knob val

	knob=$(echo $knob_val |awk -F= '{print $1}')
	val=$(echo $knob_val |awk -F= '{print $2}')
	/bin/echo $val > $CGBASEDIR/$dir/$knob
	[ "$DEBUG" == "1" ] && \
	    echo "/bin/echo $val > $CGBASEDIR/$dir/$knob (ret=$?)" >> $DBGLOG
}

cgroupinit_create_group () {
	local cgrp=$1
	local dir

	[ "$DEBUG" == "1" ] && echo "Create group $cgrp:" >> $DBGLOG
	if [ "$cgrp" == "_root_" ]; then
		dir=.
	else
		dir=$(echo $cgrp |tr '_' '/')

		if [ ! -d $CGBASEDIR/$dir ]; then
			mkdir $CGBASEDIR/$dir
			[ "$DEBUG" == "1" ] && \
			    echo "mkdir $CGBASEDIR/$dir (ret=$?)" >> $DBGLOG
		fi
	fi

	config_list_foreach $cgrp option cgroupinit_set_knob_value $dir
}

cgroupinit_configure_cgroups () {
	local enab defgrp

	[ "$DEBUG" == "1" ] && echo "$0 started $(date)" >> $DBGLOG
	config_load $CGCONFIG

	config_get enab cgroups enabled "1"
	[ $enab -eq 0 ] && return 1

	config_get defgrp cgroups defgroup "_undef_"
	[ "$defgrp" == "_undef_" ] && return 1

	if ! grep -q " $CGBASEDIR cgroup " /proc/mounts; then
		mount -t cgroup -o nodev,noexec,nosuid cgroup $CGBASEDIR
		[ $? -eq 0 ] || return 1
	fi

	config_foreach cgroupinit_create_group cgroup
	return 0
}

start_service () {
	cgroupinit_configure_cgroups
	[ $? -eq 0 ] || return

	procd_open_instance
	procd_set_param command /sbin/cgroupd $CGBASEDIR $CGCONFIG
	procd_set_param respawn
	procd_close_instance
}

stop_service () {
	local cgdir procs prc

	for cgdir in $(find $CGBASEDIR -type d -mindepth 1 -depth); do
		procs=$(cat $cgdir/cgroup.procs)
		for prc in $procs; do
			echo $prc > $CGBASEDIR/cgroup.procs
		done
		rmdir $cgdir
	done
}

service_triggers() {
        procd_add_reload_trigger $CGCONFIG
}