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 [INITRD-FILE ...]"
  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     # make install doesn't pass any parameter wrt initrd handling
  69     INITRD_OPTIONS=()
  70 else
  71     COMMAND="$1"
  72     shift
  73     INITRD_OPTIONS=( "${@:3}" )
  74 fi
  75
  76 KERNEL_VERSION="$1"
  77 KERNEL_IMAGE="$2"
  78
  79 if [[ -f /etc/machine-id ]]; then
  80     read MACHINE_ID < /etc/machine-id
  81 fi
  82
  83 if [[ ! $COMMAND ]] || [[ ! $KERNEL_VERSION ]]; then
  84     echo "Not enough arguments" >&2
  85     exit 1
  86 fi
  87
  88 if ! [[ $MACHINE_ID ]]; then
  89     BOOT_DIR_ABS=$(mktemp -d /tmp/kernel-install.XXXXX) || exit 1
  90     trap "rm -rf '$BOOT_DIR_ABS'" EXIT INT QUIT PIPE
  91 elif [[ -d /efi/loader/entries ]] || [[ -d /efi/$MACHINE_ID ]]; then
  92     BOOT_DIR_ABS="/efi/$MACHINE_ID/$KERNEL_VERSION"
  93 elif [[ -d /boot/loader/entries ]] || [[ -d /boot/$MACHINE_ID ]]; then
  94     BOOT_DIR_ABS="/boot/$MACHINE_ID/$KERNEL_VERSION"
  95 elif [[ -d /boot/efi/loader/entries ]] || [[ -d /boot/efi/$MACHINE_ID ]]; then
  96     BOOT_DIR_ABS="/boot/efi/$MACHINE_ID/$KERNEL_VERSION"
  97 elif mountpoint -q /efi; then
  98     BOOT_DIR_ABS="/efi/$MACHINE_ID/$KERNEL_VERSION"
  99 elif mountpoint -q /boot/efi; then
 100     BOOT_DIR_ABS="/boot/efi/$MACHINE_ID/$KERNEL_VERSION"
 101 else
 102     BOOT_DIR_ABS="/boot/$MACHINE_ID/$KERNEL_VERSION"
 103 fi
 104
 105 export KERNEL_INSTALL_MACHINE_ID=$MACHINE_ID
 106
 107 ret=0
 108
 109 readarray -t PLUGINS <<<"$(
 110     dropindirs_sort ".install" \
 111         "/etc/kernel/install.d" \
 112         "/usr/lib/kernel/install.d"
 113 )"
 114
 115 case $COMMAND in
 116     add)
 117         if [[ ! "$KERNEL_IMAGE" ]]; then
 118             echo "Command 'add' requires an argument" >&2
 119             exit 1
 120         fi
 121
 122         mkdir -p "$BOOT_DIR_ABS" || {
 123             echo "Could not create boot directory '$BOOT_DIR_ABS'." >&2
 124             exit 1
 125         }
 126
 127         for f in "${PLUGINS[@]}"; do
 128             if [[ -x $f ]]; then
 129                 "$f" add "$KERNEL_VERSION" "$BOOT_DIR_ABS" "$KERNEL_IMAGE" "${INITRD_OPTIONS[@]}"
 130                 x=$?
 131                 if [[ $x == $SKIP_REMAINING ]]; then
 132                     ret=0
 133                     break
 134                 fi
 135                 ((ret+=$x))
 136             fi
 137         done
 138
 139         if ! [[ $MACHINE_ID ]] && ! rmdir "$BOOT_DIR_ABS"; then
 140             echo "Warning: In kernel-install plugins, requiring BOOT_DIR_ABS to be preset is deprecated." >&2
 141             echo "         All plugins should not put anything in BOOT_DIR_ABS if the environment" >&2
 142             echo "         variable KERNEL_INSTALL_MACHINE_ID is empty." >&2
 143             rm -rf "$BOOT_DIR_ABS"
 144             ((ret+=$?))
 145         fi
 146         ;;
 147
 148     remove)
 149         for f in "${PLUGINS[@]}"; do
 150             if [[ -x $f ]]; then
 151                 "$f" remove "$KERNEL_VERSION" "$BOOT_DIR_ABS"
 152                 x=$?
 153                 if [[ $x == $SKIP_REMAINING ]]; then
 154                     ret=0
 155                     break
 156                 fi
 157                 ((ret+=$x))
 158             fi
 159         done
 160
 161         rm -rf "$BOOT_DIR_ABS"
 162         ((ret+=$?))
 163         ;;
 164
 165     *)
 166         echo "Unknown command '$COMMAND'" >&2
 167         exit 1
 168         ;;
 169 esac
 170
 171 exit $ret