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Current File : /proc/thread-self/root/sbin/mkfadumprd
#!/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 "$FADUMP_INITRD" && \
	popd > /dev/null); then
	derror "mkfadumprd: failed to unpack '$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 \
	-i $MKFADUMPRD_TMPDIR/fadumproot/usr/lib/dracut/loaded-kernel-modules.txt
	   /usr/lib/dracut/fadump-kernel-modules.txt"

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

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