#!/bin/bash --norc

# Generate an initramfs image that isolates dump capture capability within

# the default initramfs using zz-fadumpinit dracut module.

if [ -f /etc/sysconfig/kdump ]; then

	. /etc/sysconfig/kdump

fi

[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut

. $dracutbasedir/dracut-functions.sh

. /lib/kdump/kdump-lib.sh

. /lib/kdump/kdump-logger.sh

#initiate the kdump logger

if ! dlog_init; then

	echo "mkfadumprd: failed to initiate the kdump logger."

	exit 1

fi

readonly MKFADUMPRD_TMPDIR="$(mktemp -d -t mkfadumprd.XXXXXX)"

[ -d "$MKFADUMPRD_TMPDIR" ] || perror_exit "mkfadumprd: mktemp -d -t mkfadumprd.XXXXXX failed."

trap '

    ret=$?;

    [[ -d $MKFADUMPRD_TMPDIR ]] && rm --one-file-system -rf -- "$MKFADUMPRD_TMPDIR";

    exit $ret;

    ' EXIT

# clean up after ourselves no matter how we die.

trap 'exit 1;' SIGINT

MKDUMPRD="/sbin/mkdumprd -f"

# Default boot initramfs to be rebuilt

REBUILD_INITRD="$1" && shift

TARGET_INITRD="$1" && shift

FADUMP_INITRD="$MKFADUMPRD_TMPDIR/fadump.img"

### First build an initramfs with dump capture capability

# this file tells the initrd is fadump enabled

touch "$MKFADUMPRD_TMPDIR/fadump.initramfs"

ddebug "rebuild fadump initrd: $FADUMP_INITRD $DEFAULT_INITRD $KDUMP_KERNELVER"

if ! $MKDUMPRD "$FADUMP_INITRD" -i "$MKFADUMPRD_TMPDIR/fadump.initramfs" /etc/fadump.initramfs; then

	perror_exit "mkfadumprd: failed to build image with dump capture support"

fi

### Unpack the initramfs having dump capture capability

mkdir -p "$MKFADUMPRD_TMPDIR/fadumproot"

if ! (pushd "$MKFADUMPRD_TMPDIR/fadumproot" > /dev/null && lsinitrd --unpack "$MKFADUMPRD_TMPDIR/fadump.img" && \

	popd > /dev/null); then

	derror "mkfadumprd: failed to unpack '$MKFADUMPRD_TMPDIR'"

	exit 1

fi

### Pack it into the normal boot initramfs with zz-fadumpinit module

_dracut_isolate_args="--rebuild $REBUILD_INITRD --add zz-fadumpinit -i $MKFADUMPRD_TMPDIR/fadumproot /fadumproot"

if is_squash_available; then

	_dracut_isolate_args="$_dracut_isolate_args --add squash"

fi

if ! dracut --force --quiet $_dracut_isolate_args $@ "$TARGET_INITRD"; then

	perror_exit "mkfadumprd: failed to setup '$TARGET_INITRD' with dump capture capability"

fi