src/kernel-install/90-loaderentry.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-or-later
   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 COMMAND="$1"
  22 KERNEL_VERSION="$2"
  23 ENTRY_DIR_ABS="$3"
  24 KERNEL_IMAGE="$4"
  25 INITRD_OPTIONS_START="5"
  26
  27 if ! [[ $KERNEL_INSTALL_MACHINE_ID ]]; then
  28     exit 0
  29 fi
  30
  31 if ! [[ -d "$ENTRY_DIR_ABS" ]]; then
  32     exit 0
  33 fi
  34
  35 MACHINE_ID=$KERNEL_INSTALL_MACHINE_ID
  36
  37 BOOT_ROOT=${ENTRY_DIR_ABS%/$MACHINE_ID/$KERNEL_VERSION}
  38 BOOT_MNT=$(stat -c %m $BOOT_ROOT)
  39 ENTRY_DIR=${ENTRY_DIR_ABS#$BOOT_MNT}
  40
  41 if [[ $COMMAND == remove ]]; then
  42     rm -f "$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION.conf"
  43     rm -f "$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION+"*".conf"
  44     exit 0
  45 fi
  46
  47 if ! [[ $COMMAND == add ]]; then
  48     exit 1
  49 fi
  50
  51 if ! [[ $KERNEL_IMAGE ]]; then
  52     exit 1
  53 fi
  54
  55 if [[ -f /etc/os-release ]]; then
  56     . /etc/os-release
  57 elif [[ -f /usr/lib/os-release ]]; then
  58     . /usr/lib/os-release
  59 fi
  60
  61 if ! [[ $PRETTY_NAME ]]; then
  62     PRETTY_NAME="Linux $KERNEL_VERSION"
  63 fi
  64
  65 if [[ -f /etc/kernel/cmdline ]]; then
  66     read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
  67 elif [[ -f /usr/lib/kernel/cmdline ]]; then
  68     read -r -d '' -a BOOT_OPTIONS < /usr/lib/kernel/cmdline
  69 else
  70     declare -a BOOT_OPTIONS
  71
  72     read -r -d '' -a line < /proc/cmdline
  73     for i in "${line[@]}"; do
  74         [[ "${i#initrd=*}" != "$i" ]] && continue
  75         [[ "${i#BOOT_IMAGE=*}" != "$i" ]] && continue
  76         BOOT_OPTIONS+=("$i")
  77     done
  78 fi
  79
  80 if [[ -f /etc/kernel/tries ]]; then
  81     read -r TRIES </etc/kernel/tries
  82     if ! [[ "$TRIES" =~ ^[0-9]+$ ]] ; then
  83         echo "/etc/kernel/tries does not contain an integer." >&2
  84         exit 1
  85     fi
  86     LOADER_ENTRY="$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION+$TRIES.conf"
  87 else
  88     LOADER_ENTRY="$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION.conf"
  89 fi
  90
  91 cp "$KERNEL_IMAGE" "$ENTRY_DIR_ABS/linux" &&
  92     chown root:root "$ENTRY_DIR_ABS/linux" &&
  93     chmod 0644 "$ENTRY_DIR_ABS/linux" || {
  94         echo "Could not copy '$KERNEL_IMAGE to '$ENTRY_DIR_ABS/linux'." >&2
  95         exit 1
  96     }
  97
  98 INITRD_OPTIONS=( "${@:${INITRD_OPTIONS_START}}" )
  99
 100 for initrd in "${INITRD_OPTIONS[@]}"; do
 101     if [[ -f "${initrd}" ]]; then
 102         initrd_basename="$(basename ${initrd})"
 103         [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 104             echo "Installing $ENTRY_DIR_ABS/${initrd_basename}"
 105         cp "${initrd}" "$ENTRY_DIR_ABS/${initrd_basename}" &&
 106             chown root:root "$ENTRY_DIR_ABS/${initrd_basename}" &&
 107             chmod 0644 "$ENTRY_DIR_ABS/${initrd_basename}" || {
 108                 echo "Could not copy '${initrd}' to '$ENTRY_DIR_ABS/${initrd_basename}'." >&2
 109                 exit 1
 110             }
 111     fi
 112 done
 113
 114 # If no initrd option is supplied, fall back to "initrd" which is
 115 # the name used by dracut when generating it in its kernel-install hook
 116 [[ ${#INITRD_OPTIONS[@]} == 0 ]] && INITRD_OPTIONS=( initrd )
 117
 118 mkdir -p "${LOADER_ENTRY%/*}" || {
 119     echo "Could not create loader entry directory '${LOADER_ENTRY%/*}'." >&2
 120     exit 1
 121 }
 122
 123 [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 124     echo "Creating $LOADER_ENTRY"
 125 {
 126     echo "title      $PRETTY_NAME"
 127     echo "version    $KERNEL_VERSION"
 128     echo "machine-id $MACHINE_ID"
 129     echo "options    ${BOOT_OPTIONS[*]}"
 130     echo "linux      $ENTRY_DIR/linux"
 131     for initrd in "${INITRD_OPTIONS[@]}"; do
 132         [[ -f $ENTRY_DIR_ABS/$(basename ${initrd}) ]] && \
 133             echo "initrd     $ENTRY_DIR/$(basename ${initrd})"
 134     done
 135     :
 136 } > "$LOADER_ENTRY" || {
 137     echo "Could not create loader entry '$LOADER_ENTRY'." >&2
 138     exit 1
 139 }
 140 exit 0