File initd_cgconfig of Package libcgroup1.import4148

#!/bin/bash
#
# Start/Stop the workload manager
#
# Copyright IBM Corporation. 2008
#
# Copyright (c) 2008, Jiri Slaby <jslaby@suse.cz>
#
# Authors:     Balbir Singh <balbir@linux.vnet.ibm.com>
# This program is free software; you can redistribute it and/or modify it
# under the terms of version 2.1 of the GNU Lesser General Public License
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# cgconfig Control Groups Configuration Startup
# chkconfig: 2345 80 20
# description: This script runs the cgconfigparser utility to parse and setup
#              the control group filesystem. It uses /etc/cgconfig.conf
#              and parses the configuration specified in there.

### BEGIN INIT INFO
# Provides:             cgconfig
# Required-Start:       $local_fs $remote_fs $syslog $time
# Required-Stop:        $local_fs $remote_fs $syslog $time
# Should-Start:
# Should-Stop:
# Default-Start:        2 3 4 5
# Default-Stop:         0 1 6
# Short-Description:    start and stop the WLM configuration
# Description:          This script allows us to create a default configuration
### END INIT INFO

CGCONFIG_BIN=/usr/sbin/cgconfigparser
test -x $CGCONFIG_BIN || exit 5

PATH=/bin:/usr/bin:/sbin:/usr/sbin:.
MOUNTS_FILE=/proc/mounts
PROC_CGROUPS_FILE=/proc/cgroups
CGROUP_FS=cgroup
CONFIG_FILE=/etc/cgconfig.conf

# support multiple mount points
declare -a MOUNTPOINT
declare -a MOUNTOPTS
maxindex=0
servicename=cgconfig

#
# Source LSB routines
#
. /lib/lsb/init-functions

parse_mounts() {
    while read name mountpt fs opts other; do
	if echo $name | grep -q $CGROUP_FS; then
	    maxindex=$(($maxindex+1))
	    MOUNTPOINT[$maxindex]=$mountpt
	    MOUNTOPTS[$maxindex]=$opts
	fi
    done < $MOUNTS_FILE

    return 0;
}

umount_fs() {
	for i in `seq 1 $maxindex`; do
		umount ${MOUNTPOINT[$i]}
		rmdir ${MOUNTPOINT[$i]}
	done
}

start() {
	if [ -f /var/lock/subsys/$servicename ]; then
		log_warning_msg "lock file already exists"
		return 1
	fi

	#log_progress_msg "Starting cgconfig service: "
	$CGCONFIG_BIN -l $CONFIG_FILE
	[ $? -ne 0 ] && return 7
	touch /var/lock/subsys/$servicename

	defaultcgroup=

	if [ -f /etc/cgrules.conf ]; then
		read user ctrl defaultcgroup <<< \
			`grep -m1 '^*' /etc/cgrules.conf`
		if [ "X$defaultcgroup" = "X*" ]; then
			log_warning_msg "/etc/cgrules.conf default cgroup" \
				"incorrect. Overriding it"
			defaultcgroup=
		fi
	fi

	if [ -z $defaultcgroup ]; then
		defaultcgroup=sysdefault/
	fi
	#
	# Create a default class for tasks to return back to
	#
	parse_mounts
	for i in `seq 1 $maxindex`; do
		#
		# Ignore if directory already exists
		#
		mkdir ${MOUNTPOINT[$i]}/$defaultcgroup 2> /dev/null
		chmod a+rw ${MOUNTPOINT[$i]}/$defaultcgroup/tasks
		#
		# special rule for cpusets
		#
		if echo ${MOUNTOPTS[$i]} | grep -q -w cpuset; then
			cat ${MOUNTPOINT[$i]}/cpuset.cpus > \
				${MOUNTPOINT[$i]}/$defaultcgroup/cpuset.cpus
			cat ${MOUNTPOINT[$i]}/cpuset.mems > \
				${MOUNTPOINT[$i]}/$defaultcgroup/cpuset.mems
		fi
		#
		# classify everything to default cgroup
		#
		for j in `ps --no-headers -eL o tid`; do
			echo $j > ${MOUNTPOINT[$i]}/$defaultcgroup/tasks \
				2>/dev/null
		done
	done
	return 0
}

move_all_to_init_class() {
    for i in `seq 1 $maxindex`; do
	cd ${MOUNTPOINT[$i]}
	if ! grep -wq ${MOUNTPOINT[$i]} /proc/mounts; then
	    log_failure_msg "resource control filesystem not mounted"
	    exit 1
	fi

	for i in `find . -depth -type d`; do
	    case $i in
	    '.')
		;;
	    *)
		class=${i#./*}
		#log_progress_msg "Removing class $class"
		sed -nu p < ./$i/tasks > tasks
		rmdir $i
		;;
	    esac
	done
	cd - > /dev/null
    done
}


stop() {
    move_all_to_init_class
    umount_fs
    rm -f /var/lock/subsys/$servicename
}

trapped() {
    true
}

common() {
    #
    # main script work done here
    #
    trap "trapped ABRT" ABRT
    trap "trapped QUIT" QUIT
    trap "trapped TERM" TERM
    trap "trapped INT"   INT

    parse_mounts
}

restart() {
    common
    stop
    start
}

case $1 in
    'stop')
	echo -n "Stopping service $servicename"
	common
	stop
	rc_failed 0
	rc_status -v
	;;
    'start')
	echo -n "Starting service $servicename"
	common
	start
	rc_status -v
	;;
    'restart')
	restart
	rc_status
	;;
    'reload')
	restart
	rc_status -v
	;;
    'condrestart')
	test -f /var/lock/subsys/$servicename && restart
	rc_status
	;;
    'status')
	echo -n "Checking for service $servicename"
	if [ -f /var/lock/subsys/$servicename ] ; then
	    rc_failed 0
	else
	    rc_failed 3
	fi
	rc_status -v
	;;
    *)
	echo "$0 <start|stop|restart|condrestart|status>"
	exit 1
	;;
esac