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Directory : /usr/lib/kernel/install.d/

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Current File : /usr/lib/kernel/install.d/51-dracut-rescue.install

#!/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

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