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 if [[ $BOOT_MNT == '/' ]]; then
  40     ENTRY_DIR=$ENTRY_DIR_ABS
  41 else
  42     ENTRY_DIR=${ENTRY_DIR_ABS#$BOOT_MNT}
  43 fi
  44
  45 if [[ $COMMAND == remove ]]; then
  46     rm -f "$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION.conf"
  47     rm -f "$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION+"*".conf"
  48     exit 0
  49 fi
  50
  51 if ! [[ $COMMAND == add ]]; then
  52     exit 1
  53 fi
  54
  55 if ! [[ $KERNEL_IMAGE ]]; then
  56     exit 1
  57 fi
  58
  59 if [[ -f /etc/os-release ]]; then
  60     . /etc/os-release
  61 elif [[ -f /usr/lib/os-release ]]; then
  62     . /usr/lib/os-release
  63 fi
  64
  65 if ! [[ $PRETTY_NAME ]]; then
  66     PRETTY_NAME="Linux $KERNEL_VERSION"
  67 fi
  68
  69 if [[ -f /etc/kernel/cmdline ]]; then
  70     read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
  71 elif [[ -f /usr/lib/kernel/cmdline ]]; then
  72     read -r -d '' -a BOOT_OPTIONS < /usr/lib/kernel/cmdline
  73 else
  74     declare -a BOOT_OPTIONS
  75
  76     read -r -d '' -a line < /proc/cmdline
  77     for i in "${line[@]}"; do
  78         [[ "${i#initrd=*}" != "$i" ]] && continue
  79         [[ "${i#BOOT_IMAGE=*}" != "$i" ]] && continue
  80         BOOT_OPTIONS+=("$i")
  81     done
  82 fi
  83
  84 if [[ -f /etc/kernel/tries ]]; then
  85     read -r TRIES </etc/kernel/tries
  86     if ! [[ "$TRIES" =~ ^[0-9]+$ ]] ; then
  87         echo "/etc/kernel/tries does not contain an integer." >&2
  88         exit 1
  89     fi
  90     LOADER_ENTRY="$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION+$TRIES.conf"
  91 else
  92     LOADER_ENTRY="$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION.conf"
  93 fi
  94
  95 install -g root -o root -m 0644 "$KERNEL_IMAGE" "$ENTRY_DIR_ABS/linux" || {
  96     echo "Could not copy '$KERNEL_IMAGE' to '$ENTRY_DIR_ABS/linux'." >&2
  97     exit 1
  98 }
  99
 100 INITRD_OPTIONS=( "${@:${INITRD_OPTIONS_START}}" )
 101
 102 for initrd in "${INITRD_OPTIONS[@]}"; do
 103     if [[ -f "${initrd}" ]]; then
 104         initrd_basename="$(basename ${initrd})"
 105         [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 106             echo "Installing $ENTRY_DIR_ABS/${initrd_basename}"
 107         install -g root -o root -m 0644 "${initrd}" "$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