src/kernel-install/kernel-install

   1 #!/usr/bin/env 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 [OPTIONS...] add KERNEL-VERSION KERNEL-IMAGE [INITRD-FILE ...]"
  27     echo "  $0 [OPTIONS...] remove KERNEL-VERSION"
  28     echo "Options:"
  29     echo "  -h,--help     Print this help"
  30     echo "  -v,--verbose  Increase verbosity"
  31 }
  32
  33 dropindirs_sort()
  34 {
  35     local suffix=$1; shift
  36     local -a files
  37     local f d i
  38
  39     readarray -t files <<<"$(
  40         for d in "$@"; do
  41             for i in "$d/"*"$suffix"; do
  42                 if [[ -e "$i" ]]; then
  43                     echo "${i##*/}"
  44                 fi
  45             done
  46         done | sort -Vu
  47     )"
  48
  49     for f in "${files[@]}"; do
  50         for d in "$@"; do
  51             if [[ -e "$d/$f" ]]; then
  52                 echo "$d/$f"
  53                 continue 2
  54             fi
  55         done
  56     done
  57 }
  58
  59 export LC_COLLATE=C
  60
  61 for i in "$@"; do
  62     if [ "$i" == "--help" -o "$i" == "-h" ]; then
  63         usage
  64         exit 0
  65     fi
  66 done
  67
  68 KERNEL_INSTALL_VERBOSE=0
  69 if [ "$1" == "--verbose" -o "$1" == "-v" ]; then
  70     shift
  71     KERNEL_INSTALL_VERBOSE=1
  72 fi
  73 export KERNEL_INSTALL_VERBOSE
  74
  75 if [[ "${0##*/}" == 'installkernel' ]]; then
  76     COMMAND='add'
  77     # make install doesn't pass any parameter wrt initrd handling
  78     INITRD_OPTIONS=()
  79 else
  80     COMMAND="$1"
  81     shift
  82     INITRD_OPTIONS=( "${@:3}" )
  83 fi
  84
  85 KERNEL_VERSION="$1"
  86 KERNEL_IMAGE="$2"
  87
  88 # Reuse directory created without a machine ID present if it exists.
  89 if [[ -d /efi/Default ]] || [[ -d /boot/Default ]] || [[ -d /boot/efi/Default ]]; then
  90     MACHINE_ID="Default"
  91 elif [[ -f /etc/machine-id ]]; then
  92     read MACHINE_ID < /etc/machine-id
  93 else
  94     MACHINE_ID="Default"
  95 fi
  96
  97 if [[ ! $COMMAND ]] || [[ ! $KERNEL_VERSION ]]; then
  98     echo "Not enough arguments" >&2
  99     exit 1
 100 fi
 101
 102 if [[ -d /efi/loader/entries ]] || [[ -d /efi/$MACHINE_ID ]]; then
 103     ENTRY_DIR_ABS="/efi/$MACHINE_ID/$KERNEL_VERSION"
 104 elif [[ -d /boot/loader/entries ]] || [[ -d /boot/$MACHINE_ID ]]; then
 105     ENTRY_DIR_ABS="/boot/$MACHINE_ID/$KERNEL_VERSION"
 106 elif [[ -d /boot/efi/loader/entries ]] || [[ -d /boot/efi/$MACHINE_ID ]]; then
 107     ENTRY_DIR_ABS="/boot/efi/$MACHINE_ID/$KERNEL_VERSION"
 108 elif mountpoint -q /efi; then
 109     ENTRY_DIR_ABS="/efi/$MACHINE_ID/$KERNEL_VERSION"
 110 elif mountpoint -q /boot/efi; then
 111     ENTRY_DIR_ABS="/boot/efi/$MACHINE_ID/$KERNEL_VERSION"
 112 else
 113     ENTRY_DIR_ABS="/boot/$MACHINE_ID/$KERNEL_VERSION"
 114 fi
 115
 116 export KERNEL_INSTALL_MACHINE_ID=$MACHINE_ID
 117
 118 ret=0
 119
 120 readarray -t PLUGINS <<<"$(
 121     dropindirs_sort ".install" \
 122         "/etc/kernel/install.d" \
 123         "/usr/lib/kernel/install.d"
 124 )"
 125
 126 case $COMMAND in
 127     add)
 128         if [[ ! "$KERNEL_IMAGE" ]]; then
 129             echo "Command 'add' requires an argument" >&2
 130             exit 1
 131         fi
 132
 133         if [[ ! -f "$KERNEL_IMAGE" ]]; then
 134             echo "Kernel image argument ${KERNEL_IMAGE} not a file" >&2
 135             exit 1
 136         fi
 137
 138         for f in "${PLUGINS[@]}"; do
 139             if [[ -x $f ]]; then
 140                 [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 141                     echo "+$f add $KERNEL_VERSION $ENTRY_DIR_ABS $KERNEL_IMAGE ${INITRD_OPTIONS[@]}"
 142                 "$f" add "$KERNEL_VERSION" "$ENTRY_DIR_ABS" "$KERNEL_IMAGE" "${INITRD_OPTIONS[@]}"
 143                 x=$?
 144                 if [[ $x == $SKIP_REMAINING ]]; then
 145                     ret=0
 146                     break
 147                 fi
 148                 ((ret+=$x))
 149             fi
 150         done
 151         ;;
 152
 153     remove)
 154         for f in "${PLUGINS[@]}"; do
 155             if [[ -x $f ]]; then
 156                 [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 157                     echo "+$f remove $KERNEL_VERSION $ENTRY_DIR_ABS"
 158                 "$f" remove "$KERNEL_VERSION" "$ENTRY_DIR_ABS"
 159                 x=$?
 160                 if [[ $x == $SKIP_REMAINING ]]; then
 161                     ret=0
 162                     break
 163                 fi
 164                 ((ret+=$x))
 165             fi
 166         done
 167
 168         [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 169             echo "Removing $ENTRY_DIR_ABS"
 170
 171         rm -rf "$ENTRY_DIR_ABS"
 172         ((ret+=$?))
 173         ;;
 174
 175     *)
 176         echo "Unknown command '$COMMAND'" >&2
 177         exit 1
 178         ;;
 179 esac
 180
 181 exit $ret