#!/usr/bin/bash
#
# rt-setup - script to handle setup for running an RT kernel
#
# SPDX-License-Identifier: GPL-2.0-or-later
# chkconfig:   2345 00 99
# description: This script is used to setup services for use with a \
#              realtime Linux kernel \
#              The main use now is to setup cgroups

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

prog="rt-setup"

[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog

# if rt-firmware is installed
if [ -d /lib/firmware/mrg-rt-firmware ]; then
    if ! grep mrg-rt-firmware /lib/udev/firmware.sh > /dev/null
    then
	logger -t rt-setup "adding rt-firmware to udev firmware search path"
        sed -i 's#) /lib/firmware"#) /lib/firmware"\nFIRMWARE_DIRS="/lib/firmware/mrg-rt-firmware $FIRMWARE_DIRS"#' /lib/udev/firmware.sh
    fi
fi

lockfile=/var/lock/subsys/$prog

isrt() {
    [ -f /sys/kernel/realtime ] || return 1
    return 0
}

start() {
    echo -n $"Starting $prog: "
    # if not running, start it up here, usually something like "daemon $exec"
    if [ "$SLUB_CPU_PARTIAL" == "off" ]; then
	slub_cpu_partial_off
	slub_retval=$?
    else
	slub_retval=0
    fi
    echo
    # Update /etc/mrg-rt-release based on the running kernel
    /usr/bin/update-mrg-rt-release --update-etc

    [ $slub_retval -eq 0 ] && touch $lockfile
    return $slub_retval
}

stop() {
    echo -n $"Stopping $prog: "
    rm -f $lockfile
    echo
    return 0
}

restart() {
    stop
    start
}

reload() {
    restart
}

force_reload() {
    restart
}

rh_status() {
    if ! isrt; then
	echo "$prog: Not running on an RT kernel!"
	return 1
    fi
    # make sure that cpusets are mounted
    if ! grep cpuset /proc/mounts >/dev/null 2>&1; then
	echo "$prog: cpusets not mounted!"
	return 2
    fi
    echo "$prog: Running RT kernel with cpusets mounted"
    return 0
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}



# if we're not running on an RT kernel then bail
#if ! isrt; then
#    exit 0
#fi

case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart)
        $1
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
        restart
        ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
        exit 2
esac
exit $?