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 # SPDX-License-Identifier: LGPL-2.1+
   5 #
   6 # This file is part of systemd.
   7 #
   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 SKIP_REMAINING=77
  23
  24 usage()
  25 {
  26     echo "Usage:"
  27     echo "        $0 add KERNEL-VERSION KERNEL-IMAGE"
  28     echo "        $0 remove KERNEL-VERSION"
  29 }
  30
  31 dropindirs_sort()
  32 {
  33     local suffix=$1; shift
  34     local -a files
  35     local f d i
  36
  37     readarray -t files <<<"$(
  38         for d in "$@"; do
  39             for i in "$d/"*"$suffix"; do
  40                 if [[ -e "$i" ]]; then
  41                     echo "${i##*/}"
  42                 fi
  43             done
  44         done | sort -Vu
  45     )"
  46
  47     for f in "${files[@]}"; do
  48         for d in "$@"; do
  49             if [[ -e "$d/$f" ]]; then
  50                 echo "$d/$f"
  51                 continue 2
  52             fi
  53         done
  54     done
  55 }
  56
  57 export LC_COLLATE=C
  58
  59 for i in "$@"; do
  60     if [ "$i" == "--help" -o "$i" == "-h" ]; then
  61         usage
  62         exit 0
  63     fi
  64 done
  65
  66 if [[ "${0##*/}" == 'installkernel' ]]; then
  67     COMMAND='add'
  68 else
  69     COMMAND="$1"
  70     shift
  71 fi
  72
  73 KERNEL_VERSION="$1"
  74 KERNEL_IMAGE="$2"
  75
  76 if [[ -f /etc/machine-id ]]; then
  77     read MACHINE_ID < /etc/machine-id
  78 fi
  79
  80 if [[ ! $COMMAND ]] || [[ ! $KERNEL_VERSION ]]; then
  81     echo "Not enough arguments" >&2
  82     exit 1
  83 fi
  84
  85 if ! [[ $MACHINE_ID ]]; then
  86     BOOT_DIR_ABS=$(mktemp -d /tmp/kernel-install.XXXXX) || exit 1
  87     trap "rm -rf '$BOOT_DIR_ABS'" EXIT INT QUIT PIPE
  88 elif [[ -d /efi/loader/entries ]] || [[ -d /efi/$MACHINE_ID ]]; then
  89     BOOT_DIR_ABS="/efi/$MACHINE_ID/$KERNEL_VERSION"
  90 elif [[ -d /boot/loader/entries ]] || [[ -d /boot/$MACHINE_ID ]]; then
  91     BOOT_DIR_ABS="/boot/$MACHINE_ID/$KERNEL_VERSION"
  92 elif [[ -d /boot/efi/loader/entries ]] || [[ -d /boot/efi/$MACHINE_ID ]]; then
  93     BOOT_DIR_ABS="/boot/efi/$MACHINE_ID/$KERNEL_VERSION"
  94 elif mountpoint -q /efi; then
  95     BOOT_DIR_ABS="/efi/$MACHINE_ID/$KERNEL_VERSION"
  96 elif mountpoint -q /boot/efi; then
  97     BOOT_DIR_ABS="/boot/efi/$MACHINE_ID/$KERNEL_VERSION"
  98 else
  99     BOOT_DIR_ABS="/boot/$MACHINE_ID/$KERNEL_VERSION"
 100 fi
 101
 102 export KERNEL_INSTALL_MACHINE_ID=$MACHINE_ID
 103
 104 ret=0
 105
 106 readarray -t PLUGINS <<<"$(
 107     dropindirs_sort ".install" \
 108         "/etc/kernel/install.d" \
 109         "/usr/lib/kernel/install.d"
 110 )"
 111
 112 case $COMMAND in
 113     add)
 114         if [[ ! "$KERNEL_IMAGE" ]]; then
 115             echo "Command 'add' requires an argument" >&2
 116             exit 1
 117         fi
 118
 119         mkdir -p "$BOOT_DIR_ABS" || {
 120             echo "Could not create boot directory '$BOOT_DIR_ABS'." >&2
 121             exit 1
 122         }
 123
 124         for f in "${PLUGINS[@]}"; do
 125             if [[ -x $f ]]; then
 126                 "$f" add "$KERNEL_VERSION" "$BOOT_DIR_ABS" "$KERNEL_IMAGE"
 127                 x=$?
 128                 if [[ $x == $SKIP_REMAINING ]]; then
 129                     ret=0
 130                     break
 131                 fi
 132                 ((ret+=$x))
 133             fi
 134         done
 135
 136         if ! [[ $MACHINE_ID ]] && ! rmdir "$BOOT_DIR_ABS"; then
 137             echo "Warning: In kernel-install plugins, requiring BOOT_DIR_ABS to be preset is deprecated." >&2
 138             echo "         All plugins should not put anything in BOOT_DIR_ABS if the environment" >&2
 139             echo "         variable KERNEL_INSTALL_MACHINE_ID is empty." >&2
 140             rm -rf "$BOOT_DIR_ABS"
 141             ((ret+=$?))
 142         fi
 143         ;;
 144
 145     remove)
 146         for f in "${PLUGINS[@]}"; do
 147             if [[ -x $f ]]; then
 148                 "$f" remove "$KERNEL_VERSION" "$BOOT_DIR_ABS"
 149                 x=$?
 150                 if [[ $x == $SKIP_REMAINING ]]; then
 151                     ret=0
 152                     break
 153                 fi
 154                 ((ret+=$x))
 155             fi
 156         done
 157
 158         rm -rf "$BOOT_DIR_ABS"
 159         ((ret+=$?))
 160         ;;
 161
 162     *)
 163         echo "Unknown command '$COMMAND'" >&2
 164         exit 1
 165         ;;
 166 esac
 167
 168 exit $ret