src/kernel-install/90-loaderentry.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 COMMAND="$1"
   6 KERNEL_VERSION="$2"
   7 ENTRY_DIR_ABS="$3"
   8 KERNEL_IMAGE="$4"
   9 INITRD_OPTIONS_START="5"
  10
  11 if ! [[ $KERNEL_INSTALL_MACHINE_ID ]]; then
  12     exit 0
  13 fi
  14
  15 if ! [[ -d "$ENTRY_DIR_ABS" ]]; then
  16     exit 0
  17 fi
  18
  19 MACHINE_ID=$KERNEL_INSTALL_MACHINE_ID
  20
  21 ENTRY_DIR="/$MACHINE_ID/$KERNEL_VERSION"
  22 BOOT_ROOT=${ENTRY_DIR_ABS%$ENTRY_DIR}
  23
  24 if [[ $COMMAND == remove ]]; then
  25     rm -f "$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION.conf"
  26     rm -f "$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION+"*".conf"
  27     exit 0
  28 fi
  29
  30 if ! [[ $COMMAND == add ]]; then
  31     exit 1
  32 fi
  33
  34 if ! [[ $KERNEL_IMAGE ]]; then
  35     exit 1
  36 fi
  37
  38 if [[ -f /etc/os-release ]]; then
  39     . /etc/os-release
  40 elif [[ -f /usr/lib/os-release ]]; then
  41     . /usr/lib/os-release
  42 fi
  43
  44 if ! [[ $PRETTY_NAME ]]; then
  45     PRETTY_NAME="Linux $KERNEL_VERSION"
  46 fi
  47
  48 if [[ -f /etc/kernel/cmdline ]]; then
  49     read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
  50 elif [[ -f /usr/lib/kernel/cmdline ]]; then
  51     read -r -d '' -a BOOT_OPTIONS < /usr/lib/kernel/cmdline
  52 else
  53     declare -a BOOT_OPTIONS
  54
  55     read -r -d '' -a line < /proc/cmdline
  56     for i in "${line[@]}"; do
  57         [[ "${i#initrd=*}" != "$i" ]] && continue
  58         BOOT_OPTIONS+=("$i")
  59     done
  60 fi
  61
  62 if [[ -f /etc/kernel/tries ]]; then
  63     read -r TRIES </etc/kernel/tries
  64     if ! [[ "$TRIES" =~ ^[0-9]+$ ]] ; then
  65         echo "/etc/kernel/tries does not contain an integer." >&2
  66         exit 1
  67     fi
  68     LOADER_ENTRY="$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION+$TRIES.conf"
  69 else
  70     LOADER_ENTRY="$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION.conf"
  71 fi
  72
  73 cp "$KERNEL_IMAGE" "$ENTRY_DIR_ABS/linux" &&
  74    chown root:root "$ENTRY_DIR_ABS/linux" &&
  75    chmod 0644 "$ENTRY_DIR_ABS/linux" || {
  76     echo "Could not copy '$KERNEL_IMAGE to '$ENTRY_DIR_ABS/linux'." >&2
  77     exit 1
  78 }
  79
  80 INITRD_OPTIONS=( "${@:${INITRD_OPTIONS_START}}" )
  81
  82 for initrd in "${INITRD_OPTIONS[@]}"; do
  83     if [[ -f "${initrd}" ]]; then
  84         initrd_basename="$(basename ${initrd})"
  85         [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
  86             echo "Installing $ENTRY_DIR_ABS/${initrd_basename}"
  87         cp "${initrd}" "$ENTRY_DIR_ABS/${initrd_basename}" &&
  88             chown root:root "$ENTRY_DIR_ABS/${initrd_basename}" &&
  89             chmod 0644 "$ENTRY_DIR_ABS/${initrd_basename}" || {
  90              echo "Could not copy '${initrd}' to '$ENTRY_DIR_ABS/${initrd_basename}'." >&2
  91              exit 1
  92         }
  93     fi
  94 done
  95
  96 # If no initrd option is supplied, fallback to "initrd" which is
  97 # the name used by dracut when generating it in its kernel-install hook
  98 [[ ${#INITRD_OPTIONS[@]} == 0 ]] && INITRD_OPTIONS=( initrd )
  99
 100 mkdir -p "${LOADER_ENTRY%/*}" || {
 101     echo "Could not create loader entry directory '${LOADER_ENTRY%/*}'." >&2
 102     exit 1
 103 }
 104
 105 [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 106     echo "Creating $LOADER_ENTRY"
 107 {
 108     echo "title      $PRETTY_NAME"
 109     echo "version    $KERNEL_VERSION"
 110     echo "machine-id $MACHINE_ID"
 111     echo "options    ${BOOT_OPTIONS[*]}"
 112     echo "linux      $ENTRY_DIR/linux"
 113     for initrd in "${INITRD_OPTIONS[@]}"; do
 114         [[ -f $ENTRY_DIR_ABS/$(basename ${initrd}) ]] && \
 115             echo "initrd     $ENTRY_DIR/$(basename ${initrd})"
 116     done
 117     :
 118 } > "$LOADER_ENTRY" || {
 119     echo "Could not create loader entry '$LOADER_ENTRY'." >&2
 120     exit 1
 121 }
 122 exit 0