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