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 # systemd is free software; you can redistribute it and/or modify it
   9 # under the terms of the GNU Lesser General Public License as published by
  10 # the Free Software Foundation; either version 2.1 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # systemd is distributed in the hope that it will be useful, but
  14 # WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16 # General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU Lesser General Public License
  19 # along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20
  21 SKIP_REMAINING=77
  22
  23 usage()
  24 {
  25     echo "Usage:"
  26     echo "        $0 add KERNEL-VERSION KERNEL-IMAGE [INITRD-FILE ...]"
  27     echo "        $0 remove KERNEL-VERSION"
  28 }
  29
  30 dropindirs_sort()
  31 {
  32     local suffix=$1; shift
  33     local -a files
  34     local f d i
  35
  36     readarray -t files <<<"$(
  37         for d in "$@"; do
  38             for i in "$d/"*"$suffix"; do
  39                 if [[ -e "$i" ]]; then
  40                     echo "${i##*/}"
  41                 fi
  42             done
  43         done | sort -Vu
  44     )"
  45
  46     for f in "${files[@]}"; do
  47         for d in "$@"; do
  48             if [[ -e "$d/$f" ]]; then
  49                 echo "$d/$f"
  50                 continue 2
  51             fi
  52         done
  53     done
  54 }
  55
  56 export LC_COLLATE=C
  57
  58 for i in "$@"; do
  59     if [ "$i" == "--help" -o "$i" == "-h" ]; then
  60         usage
  61         exit 0
  62     fi
  63 done
  64
  65 KERNEL_INSTALL_VERBOSE=0
  66 if [ "$1" == "--verbose" -o "$1" == "-v" ]; then
  67     shift
  68     KERNEL_INSTALL_VERBOSE=1
  69 fi
  70 export KERNEL_INSTALL_VERBOSE
  71
  72 if [[ "${0##*/}" == 'installkernel' ]]; then
  73     COMMAND='add'
  74     # make install doesn't pass any parameter wrt initrd handling
  75     INITRD_OPTIONS=()
  76 else
  77     COMMAND="$1"
  78     shift
  79     INITRD_OPTIONS=( "${@:3}" )
  80 fi
  81
  82 KERNEL_VERSION="$1"
  83 KERNEL_IMAGE="$2"
  84
  85 if [[ -f /etc/machine-id ]]; then
  86     read MACHINE_ID < /etc/machine-id
  87 fi
  88
  89 if [[ ! $COMMAND ]] || [[ ! $KERNEL_VERSION ]]; then
  90     echo "Not enough arguments" >&2
  91     exit 1
  92 fi
  93
  94 if ! [[ $MACHINE_ID ]]; then
  95     BOOT_DIR_ABS=$(mktemp -d /tmp/kernel-install.XXXXX) || exit 1
  96     trap "rm -rf '$BOOT_DIR_ABS'" EXIT INT QUIT PIPE
  97 elif [[ -d /efi/loader/entries ]] || [[ -d /efi/$MACHINE_ID ]]; then
  98     BOOT_DIR_ABS="/efi/$MACHINE_ID/$KERNEL_VERSION"
  99 elif [[ -d /boot/loader/entries ]] || [[ -d /boot/$MACHINE_ID ]]; then
 100     BOOT_DIR_ABS="/boot/$MACHINE_ID/$KERNEL_VERSION"
 101 elif [[ -d /boot/efi/loader/entries ]] || [[ -d /boot/efi/$MACHINE_ID ]]; then
 102     BOOT_DIR_ABS="/boot/efi/$MACHINE_ID/$KERNEL_VERSION"
 103 elif mountpoint -q /efi; then
 104     BOOT_DIR_ABS="/efi/$MACHINE_ID/$KERNEL_VERSION"
 105 elif mountpoint -q /boot/efi; then
 106     BOOT_DIR_ABS="/boot/efi/$MACHINE_ID/$KERNEL_VERSION"
 107 else
 108     BOOT_DIR_ABS="/boot/$MACHINE_ID/$KERNEL_VERSION"
 109 fi
 110
 111 export KERNEL_INSTALL_MACHINE_ID=$MACHINE_ID
 112
 113 ret=0
 114
 115 readarray -t PLUGINS <<<"$(
 116     dropindirs_sort ".install" \
 117         "/etc/kernel/install.d" \
 118         "/usr/lib/kernel/install.d"
 119 )"
 120
 121 case $COMMAND in
 122     add)
 123         if [[ ! "$KERNEL_IMAGE" ]]; then
 124             echo "Command 'add' requires an argument" >&2
 125             exit 1
 126         fi
 127
 128         mkdir -p "$BOOT_DIR_ABS" || {
 129             echo "Could not create boot directory '$BOOT_DIR_ABS'." >&2
 130             exit 1
 131         }
 132
 133         for f in "${PLUGINS[@]}"; do
 134             if [[ -x $f ]]; then
 135                 [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 136                     echo "+$f add $KERNEL_VERSION $BOOT_DIR_ABS $KERNEL_IMAGE ${INITRD_OPTIONS[@]}"
 137                 "$f" add "$KERNEL_VERSION" "$BOOT_DIR_ABS" "$KERNEL_IMAGE" "${INITRD_OPTIONS[@]}"
 138                 x=$?
 139                 if [[ $x == $SKIP_REMAINING ]]; then
 140                     ret=0
 141                     break
 142                 fi
 143                 ((ret+=$x))
 144             fi
 145         done
 146
 147         if ! [[ $MACHINE_ID ]] && ! rmdir "$BOOT_DIR_ABS"; then
 148             echo "Warning: In kernel-install plugins, requiring BOOT_DIR_ABS to be preset is deprecated." >&2
 149             echo "         All plugins should not put anything in BOOT_DIR_ABS if the environment" >&2
 150             echo "         variable KERNEL_INSTALL_MACHINE_ID is empty." >&2
 151             rm -rf "$BOOT_DIR_ABS"
 152             ((ret+=$?))
 153         fi
 154         ;;
 155
 156     remove)
 157         for f in "${PLUGINS[@]}"; do
 158             if [[ -x $f ]]; then
 159                 [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 160                     echo "+$f remove $KERNEL_VERSION $BOOT_DIR_ABS"
 161                 "$f" remove "$KERNEL_VERSION" "$BOOT_DIR_ABS"
 162                 x=$?
 163                 if [[ $x == $SKIP_REMAINING ]]; then
 164                     ret=0
 165                     break
 166                 fi
 167                 ((ret+=$x))
 168             fi
 169         done
 170
 171         [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 172             echo "Removing $BOOT_DIR_ABS"
 173
 174         rm -rf "$BOOT_DIR_ABS"
 175         ((ret+=$?))
 176         ;;
 177
 178     *)
 179         echo "Unknown command '$COMMAND'" >&2
 180         exit 1
 181         ;;
 182 esac
 183
 184 exit $ret