#!/bin/sh
#
# Copyright (c) 2009 by Thomas Renninger <trenn@suse.de>
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
#
### BEGIN INIT INFO
# Provides:       mcelog
# Required-Start: 
# Should-Start: $remote_fs $network $syslog
# Required-Stop:  
# Should-Stop: $remote_fs $network $syslog
# Default-Start:  2 3 5
# Default-Stop:
# Short-Description: Machine Check Architecture/Error (MCA/MCE) implementations
# Description:    Depending on the configuration, the mcelog service will log
#    HW initiated Machine Check Excpetions or also react on them intelligently
### END INIT INFO

. /etc/rc.status
[ -r /etc/sysconfig/mcelog ] && . /etc/sysconfig/mcelog

# Shell functions sourced from /etc/rc.status:
#      rc_check         check and set local and overall rc status
#      rc_status        check and set local and overall rc status
#      rc_status -v     ditto but be verbose in local rc status
#      rc_status -v -r  ditto and clear the local rc status
#      rc_failed        set local and overall rc status to failed
#      rc_reset         clear local rc status (overall remains)
#      rc_exit          exit appropriate to overall rc status

# First reset status of this service
rc_reset

mcelog="/usr/sbin/mcelog"
mcelog_pid="/var/run/mcelog.pid"
mcelog_params=" --daemon  --config-file /etc/mcelog/mcelog.conf"
if [ "${MCELOG_ADMIN_EMAIL}x" != "x"  ];then
    mcelog_params="$mcelog_params --email $MCELOG_ADMIN_EMAIL"
fi
mcedev=/dev/mcelog

check="checkproc ${mcelog}"
kill="killproc ${mcelog}"
start="startproc ${mcelog} ${mcelog_params}"

test_kernel_support()
{
    if [ ! -c ${mcedev} ];then
	echo -n "$mcedev not found - no kernel or HW support "
	return 1
    else
	return 0
    fi
}

case "$1" in
    start)
        echo -n "Starting mcelog... "
        if ! test_kernel_support; then
            rc_status -u
	elif ${check};then
	    echo -n "already running"
	else
	    load_amd_driver=0
	    if grep -q -i AuthenticAMD /proc/cpuinfo; then
		fam=`head /proc/cpuinfo |sed -n -e 's/cpu family.*: \([0-9]\+\)/\1/p'`
	        # On AMD family >= 16 (0x10, fam 10h)
		if [ $fam -ge 16 >& /dev/null ];then
		    load_amd_driver=1
		fi
	    fi

	    if [ $load_amd_driver -eq 1 ];then
		echo -n "AMD CPU detected, loading edac_mce_amd"
		modprobe -q edac_mce_amd
	    else
		${start}
	    fi
	fi
        rc_status -v
        ;;
    stop)
        echo -n "Shutting down mcelog... "
	${kill}
        rc_status -v
        ;;
    try-restart)
        ## Do a restart only if the service was active before.
        $0 status
        if test $? = 0; then
                $0 restart
        else
                rc_reset        # Not running is not a failure.
        fi
        # Remember status and be quiet
        rc_status
        ;;
    reload|restart)
	/etc/init.d/mcelog stop
	/etc/init.d/mcelog start
	;;
    status)
        echo -n "Checking for service mcelog... "
        if ! test_kernel_support; then
            rc_status -u
	else
	    if lsmod |grep -q edac_mce_amd;then
		true
	    else
		${check}
	    fi
	    rc_status -v
	fi
        ;;
    *)
	echo "Usage: $0 {start|stop|restart|reload|status}"
        exit 1
	;;
esac

rc_exit