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#!/bin/bash # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*- # ex: ts=8 sw=4 sts=4 et filetype=sh export LANG=C COMMAND="$1" KERNEL_VERSION="$2" BOOT_DIR_ABS="${3%/*}/0-rescue" KERNEL_IMAGE="$4" 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 } [[ -f /etc/os-release ]] && . /etc/os-release if [[ ! -f /etc/machine-id ]] || [[ ! -s /etc/machine-id ]]; then systemd-machine-id-setup fi [[ -f /etc/machine-id ]] && read MACHINE_ID < /etc/machine-id if [[ -f /etc/kernel/cmdline ]]; then readarray -t BOOT_OPTIONS < /etc/kernel/cmdline fi if ! [[ "${BOOT_OPTIONS[@]}" ]]; then readarray -t BOOT_OPTIONS < /proc/cmdline fi if ! [[ $BOOT_OPTIONS ]]; then exit 1 fi LOADER_ENTRY="/boot/loader/entries/${MACHINE_ID}-0-rescue.conf" BOOT_DIR="/${MACHINE_ID}/0-rescue" ret=0 case "$COMMAND" in add) for i in "/boot/loader/entries/${MACHINE_ID}-0-rescue.conf"; do [[ -f $i ]] && exit 0 done # source our config dir for f in $(dropindirs_sort ".conf" "/etc/dracut.conf.d" "/usr/lib/dracut/dracut.conf.d"); do [[ -e $f ]] && . "$f" done [[ $dracut_rescue_image != "yes" ]] && exit 0 [[ -d "$BOOT_DIR_ABS" ]] || mkdir -p "$BOOT_DIR_ABS" if ! cp "$KERNEL_IMAGE" "$BOOT_DIR_ABS"/linux; then echo "Can't copy '$KERNEL_IMAGE to '$BOOT_DIR_ABS/linux'!" >&2 fi dracut --no-hostonly -a "rescue" "$BOOT_DIR_ABS"/initrd "$2" ((ret+=$?)) { 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" } > $LOADER_ENTRY ((ret+=$?)) ;; remove) exit 0 ;; *) usage ret=1;; esac ((ret+=$?)) exit $ret