s390utils/52-zipl-rescue.install

#!/bin/bash

[[ -f /etc/os-release ]] && . /etc/os-release
[[ -f /etc/sysconfig/kernel ]] && . /etc/sysconfig/kernel

COMMAND="$1"
KERNEL_VERSION="$2"
BOOT_DIR_ABS="$3"
KERNEL_IMAGE="$4"

MACHINE_ID=$KERNEL_INSTALL_MACHINE_ID

BLS_DIR="/boot/loader/entries"

[[ "$KERNEL_VERSION" == *\+* ]] && flavor=-"${KERNEL_VERSION##*+}"
case "$COMMAND" in
    add)
        if [[ ! -f /sbin/new-kernel-pkg || -d "${BLS_DIR}" ]]; then
            declare -a BOOT_OPTIONS
            if [[ -f /etc/kernel/cmdline ]]; then
                read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
            fi

            if ! [[ ${BOOT_OPTIONS[*]} ]]; then
                read -r -d '' -a line < /proc/cmdline
                for i in "${line[@]}"; do
                    [[ "${i#initrd=*}" != "$i" ]] && continue
                    BOOT_OPTIONS+=("$i")
                done
            fi

            BLS_RESCUE="${BLS_DIR}/${MACHINE_ID}-0-rescue.conf"
            if [[ -f "${BLS_RESCUE}" ]] && grep -q '^options.*$kernelopts' "${BLS_RESCUE}"; then
               sed -i -e "s,^linux.*,linux /boot/vmlinuz-0-rescue-${MACHINE_ID},g" "${BLS_RESCUE}"
               sed -i -e "s,^initrd.*,initrd /boot/initramfs-0-rescue-${MACHINE_ID}.img,g" "${BLS_RESCUE}"
               sed -i -e "s#^options.*#options ${BOOT_OPTIONS[*]}#g" "${BLS_RESCUE}"
            fi
        fi
        ;;
    *)
        ;;
esac