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|
#!/bin/bash
export LANG=C
COMMAND="${1:?}"
KERNEL_VERSION="${2:?}"
BOOT_DIR_ABS="${3%/*}/0-rescue"
KERNEL_IMAGE="$4"
# If the initrd was provided on the kernel command line, we shouldn't generate our own.
if [[ "$COMMAND" = "add" && "$#" -gt 4 ]]; then
exit 0
fi
# Do not attempt to create initramfs if the supplied image is already a UKI
if [[ "$KERNEL_INSTALL_IMAGE_TYPE" = "uki" ]]; then
exit 0
fi
if [[ "$KERNEL_INSTALL_UKI_GENERATOR" = "dracut" ]]; then
# Rescue images currently not compatible with UKIs
exit 0
elif [[ "${KERNEL_INSTALL_INITRD_GENERATOR:-dracut}" != "dracut" ]]; then
# We are not the initrd generator
exit 0
fi
dropindirs_sort() {
suffix=$1
shift
args=("$@")
files=$(
while (($# > 0)); do
for i in "${1}"/*"${suffix}"; do
[[ -f $i ]] && echo "${i##*/}"
done
shift
done | sort -Vu
)
for f in $files; do
for d in "${args[@]}"; do
if [[ -f "$d/$f" ]]; then
echo "$d/$f"
continue 2
fi
done
done
}
if [[ -f /etc/os-release ]]; then
. /etc/os-release
elif [[ -f /usr/lib/os-release ]]; then
. /usr/lib/os-release
fi
[[ -n $PRETTY_NAME ]] || PRETTY_NAME="Linux $KERNEL_VERSION"
if [[ ${KERNEL_INSTALL_MACHINE_ID+x} ]]; then
MACHINE_ID=$KERNEL_INSTALL_MACHINE_ID
elif [[ -f /etc/machine-id ]]; then
read -r MACHINE_ID < /etc/machine-id
fi
if ! [[ $MACHINE_ID ]]; then
exit 0
fi
if [ -n "$KERNEL_INSTALL_CONF_ROOT" ]; then
if [ -f "$KERNEL_INSTALL_CONF_ROOT/cmdline" ]; then
read -r -d '' -a BOOT_OPTIONS < "$KERNEL_INSTALL_CONF_ROOT/cmdline"
fi
elif [[ -f /etc/kernel/cmdline ]]; then
read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
elif [[ -f /usr/lib/kernel/cmdline ]]; then
read -r -d '' -a BOOT_OPTIONS < /usr/lib/kernel/cmdline
else
declare -a BOOT_OPTIONS
read -r -d '' -a line < /proc/cmdline
for i in "${line[@]}"; do
[[ ${i#initrd=*} != "$i" ]] && continue
BOOT_OPTIONS+=("$i")
done
fi
if [[ -d ${BOOT_DIR_ABS%/*} ]]; then
BOOT_DIR="/${MACHINE_ID}/0-rescue"
BOOT_ROOT=${BOOT_DIR_ABS%"$BOOT_DIR"}
LOADER_ENTRY="$BOOT_ROOT/loader/entries/${MACHINE_ID}-0-rescue.conf"
KERNEL="linux"
INITRD="initrd"
else
BLS_DIR="/boot/loader/entries"
BOOT_DIR_ABS="/boot"
LOADER_ENTRY="$BLS_DIR/${MACHINE_ID}-0-rescue.conf"
KERNEL="vmlinuz-0-rescue-${MACHINE_ID}"
INITRD="initramfs-0-rescue-${MACHINE_ID}.img"
fi
ret=0
case "$COMMAND" in
add)
if [[ -f $LOADER_ENTRY ]] && [[ -f "$BOOT_DIR_ABS/$KERNEL" ]] \
&& [[ -f "$BOOT_DIR_ABS/$INITRD" ]]; then
[[ $KERNEL_INSTALL_VERBOSE == 1 ]] \
&& echo "Skipping, there is already a rescue image generated with the same input parameters"
exit 0
fi
# source our config dir
for f in $(dropindirs_sort ".conf" "/etc/dracut.conf.d" "/usr/lib/dracut/dracut.conf.d"); do
if [[ -e $f ]]; then
# shellcheck disable=SC1090
. "$f"
fi
done
if [[ $dracut_rescue_image != "yes" ]]; then
[[ $KERNEL_INSTALL_VERBOSE == 1 ]] \
&& echo "Skipping, 'dracut_rescue_image' not set to 'yes' in any dracut configuration file"
exit 0
fi
[[ -d $BOOT_DIR_ABS ]] || mkdir -p "$BOOT_DIR_ABS"
if ! cp --reflink=auto "$KERNEL_IMAGE" "$BOOT_DIR_ABS/$KERNEL"; then
echo "Can't copy '$KERNEL_IMAGE to '$BOOT_DIR_ABS/$KERNEL'!" >&2
fi
if [[ ! -f "$BOOT_DIR_ABS/$INITRD" ]]; then
# shellcheck disable=SC2046
dracut -f --no-hostonly --no-uefi \
-a "rescue" \
$([[ $KERNEL_INSTALL_VERBOSE == 1 ]] && echo --verbose) \
--kver "$KERNEL_VERSION" \
"$BOOT_DIR_ABS/$INITRD"
((ret += $?))
fi
[[ $KERNEL_INSTALL_VERBOSE == 1 ]] && echo "Creating $LOADER_ENTRY"
if [[ ${BOOT_DIR_ABS} != "/boot" ]]; then
{
echo "title $PRETTY_NAME - Rescue Image"
echo "version $KERNEL_VERSION"
echo "machine-id $MACHINE_ID"
echo "options ${BOOT_OPTIONS[*]} rd.auto=1"
echo "linux $BOOT_DIR/linux"
echo "initrd $BOOT_DIR/initrd"
} > "$LOADER_ENTRY"
else
if [[ -e "${BLS_DIR}/${MACHINE_ID}-${KERNEL_VERSION}.conf" ]]; then
cp -aT "${BLS_DIR}/${MACHINE_ID}-${KERNEL_VERSION}.conf" "$LOADER_ENTRY"
else
cp -aT "${KERNEL_IMAGE%/*}/bls.conf" "$LOADER_ENTRY"
fi
sed -i "s/${KERNEL_VERSION}/0-rescue-${MACHINE_ID}/" "$LOADER_ENTRY"
fi
((ret += $?))
;;
remove)
exit 0
;;
esac
exit $ret
|
