#!/bin/sh

PREREQ=""

prereqs()
{
        echo "${PREREQ}"
}

case ${1} in
        prereqs)
                prereqs
                exit 0
                ;;
esac

#Check if VMCORE is available
if [ ! -f /proc/vmcore ]; then
        exit 0
fi

. /scripts/functions
. /scripts/local

log_end_msg
log_begin_msg "mounting  ${ROOT} over ${rootmnt}"
sleep 2
log_end_msg
mount -o remount,rw,relatime,errors=remount-ro ${ROOT} ${rootmnt}

log_begin_msg "Dumping the crashed kernel"
log_end_msg

KDUMP_DEFAULTS=${rootmnt}/etc/default/kdump-tools
[ -r $KDUMP_DEFAULTS ] && . $KDUMP_DEFAULTS

mkdir -p ${rootmnt}/var/crash
rm -fr /var/crash
ln -s ${rootmnt}/var/crash /var/crash

KDUMP_COREDIR=${KDUMP_COREDIR:=/var/crash}
KDUMP_SKIP_VMCORE=${KDUMP_SKIP_VMCORE:=1}
KDUMP_DUMP_DMESG=${KDUMP_DUMP_DMESG:=1}
KDUMP_NUM_DUMPS=${KDUMP_NUM_DUMPS:=0}
MAKEDUMP_ARGS=${MAKEDUMP_ARGS:="-c -d 31"}


IOMEM_ADDR=`grep -i "Crash kernel" /proc/iomem | sed "s/-..*//" | sed "s/^[ 0]*/0x/"`
vmcore_file=/proc/vmcore

KDUMP_STAMP=`date +"%Y%m%d%H%M"`
KDUMP_STAMPDIR="$KDUMP_COREDIR/$KDUMP_STAMP"
if [ -d $KDUMP_STAMPDIR ]; then
	log_failure_msg "Directory $KDUMP_STAMPDIR already exist"
	exit 1
fi

mkdir -p $KDUMP_STAMPDIR
KDUMP_COREFILE="$KDUMP_STAMPDIR/dump.$KDUMP_STAMP"
KDUMP_DMESGFILE="$KDUMP_STAMPDIR/dmesg.$KDUMP_STAMP"

if [ "$KDUMP_DUMP_DMESG" -eq 1 ] ; then
        log_begin_msg "running makedumpfile --dump-dmesg $vmcore file $KDUMP_DMESGFILE"
        sleep 2
        log_end_msg
        makedumpfile --dump-dmesg $vmcore_file $KDUMP_DMESGFILE
fi

if [ "$KDUMP_SKIP_VMCORE" -ne 1 ]; then
        log_begin_msg "running makedumpfile $MAKEDUMP_ARGS $vmcore_file $KDUMP_COREFILE"
        sleep 2
        log_end_msg
        makedumpfile $MAKEDUMP_ARGS $vmcore_file $KDUMP_COREFILE
fi

sync
umount ${rootmnt} 2> /dev/null

log_success_msg "Rebooting system"
sleep 2

echo 1 > /proc/sys/kernel/sysrq
echo b > /proc/sysrq-trigger