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 BOOT_DIR_ABS="$3"
   8 KERNEL_IMAGE="$4"
   9
  10 if [[ -f /etc/machine-id ]]; then
  11     read MACHINE_ID < /etc/machine-id
  12 fi
  13
  14 if ! [[ $MACHINE_ID ]]; then
  15     exit 1
  16 fi
  17
  18 BOOT_DIR="/$MACHINE_ID/$KERNEL_VERSION"
  19 BOOT_ROOT=${BOOT_DIR_ABS%$BOOT_DIR}
  20 LOADER_ENTRY="$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION.conf"
  21
  22 if [[ $COMMAND == remove ]]; then
  23     exec rm -f "$LOADER_ENTRY"
  24 fi
  25
  26 if ! [[ $COMMAND == add ]]; then
  27     exit 1
  28 fi
  29
  30 if ! [[ $KERNEL_IMAGE ]]; then
  31     exit 1
  32 fi
  33
  34 if [[ -f /etc/os-release ]]; then
  35     . /etc/os-release
  36 elif [[ -f /usr/lib/os-release ]]; then
  37     . /usr/lib/os-release
  38 fi
  39
  40 if ! [[ $PRETTY_NAME ]]; then
  41     PRETTY_NAME="Linux $KERNEL_VERSION"
  42 fi
  43
  44 declare -a BOOT_OPTIONS
  45
  46 if [[ -f /etc/kernel/cmdline ]]; then
  47     read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
  48 fi
  49
  50 if ! [[ ${BOOT_OPTIONS[*]} ]]; then
  51     read -r -d '' -a line < /proc/cmdline
  52     for i in "${line[@]}"; do
  53         [[ "${i#initrd=*}" != "$i" ]] && continue
  54         BOOT_OPTIONS+=("$i")
  55     done
  56 fi
  57
  58 if ! [[ ${BOOT_OPTIONS[*]} ]]; then
  59     echo "Could not determine the kernel command line parameters." >&2
  60     echo "Please specify the kernel command line in /etc/kernel/cmdline!" >&2
  61     exit 1
  62 fi
  63
  64 cp "$KERNEL_IMAGE" "$BOOT_DIR_ABS/linux" &&
  65    chown root:root "$BOOT_DIR_ABS/linux" &&
  66    chmod 0644 "$BOOT_DIR_ABS/linux" || {
  67     echo "Could not copy '$KERNEL_IMAGE to '$BOOT_DIR_ABS/linux'." >&2
  68     exit 1
  69 }
  70
  71 mkdir -p "${LOADER_ENTRY%/*}" || {
  72     echo "Could not create loader entry directory '${LOADER_ENTRY%/*}'." >&2
  73     exit 1
  74 }
  75
  76 {
  77     echo "title      $PRETTY_NAME"
  78     echo "version    $KERNEL_VERSION"
  79     echo "machine-id $MACHINE_ID"
  80     echo "options    ${BOOT_OPTIONS[*]}"
  81     echo "linux      $BOOT_DIR/linux"
  82     [[ -f $BOOT_DIR_ABS/initrd ]] && \
  83         echo "initrd     $BOOT_DIR/initrd"
  84     :
  85 } > "$LOADER_ENTRY" || {
  86     echo "Could not create loader entry '$LOADER_ENTRY'." >&2
  87     exit 1
  88 }
  89 exit 0