51-dracut-rescue.install

   1 #!/bin/bash
   2 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
   3 # ex: ts=8 sw=4 sts=4 et filetype=sh
   4
   5 export LANG=C
   6
   7 COMMAND="$1"
   8 KERNEL_VERSION="$2"
   9 BOOT_DIR_ABS="${3%/*}/0-rescue"
  10 KERNEL_IMAGE="$4"
  11
  12
  13 dropindirs_sort()
  14 {
  15     suffix=$1; shift
  16     args=("$@")
  17     files=$(
  18         while (( $# > 0 )); do
  19             for i in ${1}/*${suffix}; do
  20                 [[ -f $i ]] && echo ${i##*/}
  21             done
  22             shift
  23         done | sort -Vu
  24     )
  25
  26     for f in $files; do
  27         for d in "${args[@]}"; do
  28             if [[ -f "$d/$f" ]]; then
  29                 echo "$d/$f"
  30                 continue 2
  31             fi
  32         done
  33     done
  34 }
  35
  36 [[ -f /etc/os-release ]] && . /etc/os-release
  37
  38 if [[ ! -f /etc/machine-id ]] || [[ ! -s /etc/machine-id ]]; then
  39     systemd-machine-id-setup
  40 fi
  41
  42 [[ -f /etc/machine-id ]] && read MACHINE_ID < /etc/machine-id
  43
  44 if [[ -f /etc/kernel/cmdline ]]; then
  45     readarray -t BOOT_OPTIONS < /etc/kernel/cmdline
  46 fi
  47 if ! [[ "${BOOT_OPTIONS[@]}" ]]; then
  48     readarray -t BOOT_OPTIONS < /proc/cmdline
  49 fi
  50 if ! [[ $BOOT_OPTIONS ]]; then
  51     exit 1
  52 fi
  53
  54 LOADER_ENTRY="/boot/loader/entries/${MACHINE_ID}-0-rescue.conf"
  55 BOOT_DIR="/${MACHINE_ID}/0-rescue"
  56
  57 ret=0
  58
  59 case "$COMMAND" in
  60     add)
  61         for i in "/boot/loader/entries/${MACHINE_ID}-0-rescue.conf"; do
  62             [[ -f $i ]] && exit 0
  63         done
  64
  65         # source our config dir
  66         for f in $(dropindirs_sort ".conf" "/etc/dracut.conf.d" "/usr/lib/dracut/dracut.conf.d"); do
  67             [[ -e $f ]] && . "$f"
  68         done
  69
  70         [[ $dracut_rescue_image != "yes" ]] && exit 0
  71
  72         [[ -d "$BOOT_DIR_ABS" ]] || mkdir -p "$BOOT_DIR_ABS"
  73
  74         if ! cp "$KERNEL_IMAGE" "$BOOT_DIR_ABS"/linux; then
  75             echo "Can't copy '$KERNEL_IMAGE to '$BOOT_DIR_ABS/linux'!" >&2
  76         fi
  77
  78         dracut --no-hostonly  -a "rescue" "$BOOT_DIR_ABS"/initrd "$2"
  79         ((ret+=$?))
  80
  81         {
  82             echo "title      $PRETTY_NAME - Rescue Image"
  83             echo "version    $KERNEL_VERSION"
  84             echo "machine-id $MACHINE_ID"
  85             echo "options    ${BOOT_OPTIONS[@]} rd.auto=1"
  86             echo "linux      $BOOT_DIR/linux"
  87             echo "initrd     $BOOT_DIR/initrd"
  88         } > $LOADER_ENTRY
  89         ((ret+=$?))
  90         ;;
  91
  92     remove)
  93         exit 0
  94         ;;
  95
  96     *)
  97         usage
  98         ret=1;;
  99 esac
 100
 101 ((ret+=$?))
 102
 103 exit $ret