src/kernel-install/kernel-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 # This file is part of systemd.
   6 #
   7 # Copyright 2013 Harald Hoyer
   8 #
   9 # systemd is free software; you can redistribute it and/or modify it
  10 # under the terms of the GNU Lesser General Public License as published by
  11 # the Free Software Foundation; either version 2.1 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # systemd is distributed in the hope that it will be useful, but
  15 # WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17 # General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU Lesser General Public License
  20 # along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21
  22 usage()
  23 {
  24     echo "Usage:" >&2
  25     echo "        $0 add <kernel-version> <kernel-image>" >&2
  26     echo "        $0 remove <kernel-version> <kernel-image>" >&2
  27 }
  28
  29 dropindirs_sort()
  30 {
  31     local suffix=$1; shift
  32     local -a files
  33     local f d i
  34
  35     readarray -t files < <(
  36         for d in "$@"; do
  37             for i in "$d/"*"$suffix"; do
  38                 if [[ -e "$i" ]]; then
  39                     echo "${i##*/}"
  40                 fi
  41             done
  42         done | sort -Vu
  43     )
  44
  45     for f in "${files[@]}"; do
  46         for d in "$@"; do
  47             if [[ -e "$d/$f" ]]; then
  48                 echo "$d/$f"
  49                 continue 2
  50             fi
  51         done
  52     done
  53 }
  54
  55 export LC_COLLATE=C
  56
  57 if [[ "${0##*/}" == 'installkernel' ]]; then
  58     COMMAND='add'
  59 else
  60     COMMAND="$1"
  61     shift
  62 fi
  63
  64 KERNEL_VERSION="$1"
  65 KERNEL_IMAGE="$2"
  66
  67 if [[ -f /etc/machine-id ]]; then
  68     read MACHINE_ID < /etc/machine-id
  69 fi
  70
  71 if ! [[ $MACHINE_ID ]]; then
  72     echo "Could not determine your machine ID from /etc/machine-id." >&2
  73     echo "Please run 'systemd-machine-id-setup' as root. See man:machine-id(5)" >&2
  74     exit 1
  75 fi
  76
  77 if [[ ! $COMMAND ]] || [[ ! $KERNEL_VERSION ]]; then
  78     usage
  79     exit 1
  80 fi
  81
  82 BOOT_DIR_ABS="/boot/$MACHINE_ID/$KERNEL_VERSION"
  83 ret=0
  84
  85 readarray -t PLUGINS < <(
  86     dropindirs_sort ".install" \
  87         "/etc/kernel/install.d" \
  88         "/usr/lib/kernel/install.d"
  89 )
  90
  91 case $COMMAND in
  92     add)
  93         if [[ ! $KERNEL_IMAGE ]]; then
  94             usage
  95             exit 1
  96         fi
  97
  98         mkdir -p "$BOOT_DIR_ABS" || {
  99             echo "Could not create boot directory '$BOOT_DIR_ABS'." >&2
 100             exit 1
 101         }
 102
 103         for f in "${PLUGINS[@]}"; do
 104             if [[ -x $f ]]; then
 105                 "$f" add "$KERNEL_VERSION" "$BOOT_DIR_ABS" "$KERNEL_IMAGE"
 106                 ((ret+=$?))
 107             fi
 108         done
 109         ;;
 110
 111     remove)
 112         for f in "${PLUGINS[@]}"; do
 113             if [[ -x $f ]]; then
 114                 "$f" remove "$KERNEL_VERSION" "$BOOT_DIR_ABS"
 115                 ((ret+=$?))
 116             fi
 117         done
 118
 119         rm -rf "$BOOT_DIR_ABS"
 120         ((ret+=$?))
 121         ;;
 122
 123     *)
 124         usage
 125         exit 1
 126         ;;
 127 esac
 128
 129 exit $ret