JezK
Edit File: kernel-install
#!/bin/sh # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*- # ex: ts=8 sw=4 sts=4 et filetype=sh # SPDX-License-Identifier: LGPL-2.1-or-later # # This file is part of systemd. # # systemd is free software; you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as published by # the Free Software Foundation; either version 2.1 of the License, or # (at your option) any later version. # # systemd is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # You should have received a copy of the GNU Lesser General Public License # along with systemd; If not, see <https://www.gnu.org/licenses/>. skip_remaining=77 set -e usage() { echo "Usage:" echo " kernel-install [OPTIONS...] add KERNEL-VERSION KERNEL-IMAGE [INITRD-FILE...]" echo " kernel-install [OPTIONS...] remove KERNEL-VERSION" echo " kernel-install [OPTIONS...] inspect" echo "Options:" echo " -h, --help Print this help and exit" echo " --version Print version string and exit" echo " -v, --verbose Increase verbosity" } dropindirs_sort() { suffix="$1" shift for d; do for i in "$d/"*"$suffix"; do [ -e "$i" ] && echo "${i##*/}" done done | sort -Vu | while read -r f; do for d; do if [ -e "$d/$f" ]; then [ -x "$d/$f" ] && echo "$d/$f" continue 2 fi done done } export LC_COLLATE=C for i; do if [ "$i" = "--help" ] || [ "$i" = "-h" ]; then usage exit 0 fi done for i; do if [ "$i" = "--version" ]; then echo "kernel-install 252 (252.39-1~deb12u2)" exit 0 fi done if [ "$KERNEL_INSTALL_BYPASS" = "1" ]; then echo "kernel-install: Skipping execution because KERNEL_INSTALL_BYPASS=1" exit 0 fi export KERNEL_INSTALL_VERBOSE=0 if [ "$1" = "--verbose" ] || [ "$1" = "-v" ]; then shift export KERNEL_INSTALL_VERBOSE=1 log_verbose() { printf "%s\n" "$*"; } else log_verbose() { :; } fi if [ "${0##*/}" = "installkernel" ]; then COMMAND=add # kernel's install.sh invokes us as # /sbin/installkernel <version> <vmlinuz> <map> <installation-dir> # We ignore the last two arguments. set -- "${1:?}" "${2:?}" else COMMAND="$1" [ $# -ge 1 ] && shift fi if [ "$COMMAND" = "inspect" ]; then KERNEL_VERSION="" else if [ $# -lt 1 ]; then echo "Error: not enough arguments" >&2 exit 1 fi KERNEL_VERSION="$1" shift fi # These two settings are only settable via install.conf layout= initrd_generator= # These two settings can be inherited from the environment _MACHINE_ID_SAVED="$MACHINE_ID" _BOOT_ROOT_SAVED="$BOOT_ROOT" if [ -n "$KERNEL_INSTALL_CONF_ROOT" ]; then install_conf="$KERNEL_INSTALL_CONF_ROOT/install.conf" elif [ -f "/etc/kernel/install.conf" ]; then install_conf="/etc/kernel/install.conf" elif [ -f "/usr/lib/kernel/install.conf" ]; then install_conf="/usr/lib/kernel/install.conf" else install_conf= fi if [ -f "$install_conf" ]; then log_verbose "Reading $install_conf…" # shellcheck source=/dev/null . "$install_conf" fi [ -n "$layout" ] && log_verbose "$install_conf configures layout=$layout" [ -n "$initrd_generator" ] && \ log_verbose "$install_conf configures initrd_generator=$initrd_generator" if [ -n "$_MACHINE_ID_SAVED" ]; then MACHINE_ID="$_MACHINE_ID_SAVED" log_verbose "MACHINE_ID=$MACHINE_ID set via environment" else [ -n "$MACHINE_ID" ] && log_verbose "MACHINE_ID=$MACHINE_ID set via install.conf" fi if [ -n "$_BOOT_ROOT_SAVED" ]; then BOOT_ROOT="$_BOOT_ROOT_SAVED" log_verbose "BOOT_ROOT=$BOOT_ROOT set via environment" else [ -n "$BOOT_ROOT" ] && log_verbose "BOOT_ROOT=$BOOT_ROOT set via install.conf" fi # If /etc/machine-id is initialized we'll use it, otherwise we'll use a freshly # generated one. If the user configured an explicit machine ID to use in # /etc/machine-info to use for our purpose, we'll use that instead (for # compatibility). # shellcheck source=/dev/null if [ -z "$MACHINE_ID" ] && [ -f /etc/machine-info ]; then . /etc/machine-info MACHINE_ID="$KERNEL_INSTALL_MACHINE_ID" [ -n "$MACHINE_ID" ] && \ log_verbose "machine-id $MACHINE_ID acquired from /etc/machine-info" fi if [ -z "$MACHINE_ID" ] && [ -s /etc/machine-id ]; then read -r MACHINE_ID </etc/machine-id [ "$MACHINE_ID" = "uninitialized" ] && unset MACHINE_ID [ -n "$MACHINE_ID" ] && \ log_verbose "machine-id $MACHINE_ID acquired from /etc/machine-id" fi if [ -z "$MACHINE_ID" ]; then MACHINE_ID="$(systemd-id128 new)" || exit 1 log_verbose "new machine-id $MACHINE_ID generated" fi # Now that we determined the machine ID to use, let's determine the "token" for # the boot loader entry to generate. We use that for naming the directory below # $BOOT where we want to place the kernel/initrd and related resources, as well # for naming the .conf boot loader spec entry. Typically this is just the # machine ID, but it can be anything else, too, if we are told so. ENTRY_TOKEN_FILE="${KERNEL_INSTALL_CONF_ROOT:-/etc/kernel}/entry-token" if [ -z "$ENTRY_TOKEN" ] && [ -f "$ENTRY_TOKEN_FILE" ]; then read -r ENTRY_TOKEN <"$ENTRY_TOKEN_FILE" log_verbose "entry-token \"$ENTRY_TOKEN\" acquired from $ENTRY_TOKEN_FILE" fi if [ -z "$ENTRY_TOKEN" ]; then # If not configured explicitly, then use a few candidates: the machine ID, # the IMAGE_ID= and ID= fields from /etc/os-release and finally the fixed # string "Default" ENTRY_TOKEN_SEARCH="$MACHINE_ID" # shellcheck source=/dev/null [ -f /etc/os-release ] && . /etc/os-release [ -n "$IMAGE_ID" ] && ENTRY_TOKEN_SEARCH="$ENTRY_TOKEN_SEARCH $IMAGE_ID" [ -n "$ID" ] && ENTRY_TOKEN_SEARCH="$ENTRY_TOKEN_SEARCH $ID" ENTRY_TOKEN_SEARCH="$ENTRY_TOKEN_SEARCH Default" else ENTRY_TOKEN_SEARCH="$ENTRY_TOKEN" fi log_verbose "Entry-token candidates: $ENTRY_TOKEN_SEARCH" # NB: The $MACHINE_ID is guaranteed to be a valid machine ID, but # $ENTRY_TOKEN can be any string that fits into a VFAT filename, though # typically is just the machine ID. if [ -n "$BOOT_ROOT" ]; then # If this was already configured, don't try to guess BOOT_ROOT_SEARCH="$BOOT_ROOT" else BOOT_ROOT_SEARCH="/efi /boot /boot/efi" fi for pref in $BOOT_ROOT_SEARCH; do for suff in $ENTRY_TOKEN_SEARCH; do if [ -d "$pref/$suff" ]; then [ -z "$BOOT_ROOT" ] && BOOT_ROOT="$pref" [ -z "$ENTRY_TOKEN" ] && ENTRY_TOKEN="$suff" log_verbose "$pref/$suff exists, using BOOT_ROOT=$BOOT_ROOT, ENTRY_TOKEN=$ENTRY_TOKEN" break 2 else [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && echo "$pref/$suff not found…" fi if [ -d "$pref/loader/entries" ]; then [ -z "$BOOT_ROOT" ] && BOOT_ROOT="$pref" log_verbose "$pref/loader/entries exists, using BOOT_ROOT=$BOOT_ROOT" break 2 else log_verbose "$pref/loader/entries not found…" fi done done [ -z "$BOOT_ROOT" ] && for pref in "/efi" "/boot/efi"; do if mountpoint -q "$pref"; then BOOT_ROOT="$pref" log_verbose "$pref is a mount point, using BOOT_ROOT=$BOOT_ROOT" break else log_verbose "$pref is not a mount point…" fi done if [ -z "$BOOT_ROOT" ]; then BOOT_ROOT="/boot" [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \ echo "KERNEL_INSTALL_BOOT_ROOT autodection yielded no candidates, using \"$BOOT_ROOT\"" fi if [ -z "$ENTRY_TOKEN" ]; then ENTRY_TOKEN="$MACHINE_ID" [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \ echo "No entry-token candidate matched, using \"$ENTRY_TOKEN\" from machine-id" fi if [ -z "$layout" ]; then # No layout configured by the administrator. Let's try to figure it out # automatically from metadata already contained in $BOOT_ROOT. if [ -e "$BOOT_ROOT/loader/entries.srel" ]; then read -r ENTRIES_SREL <"$BOOT_ROOT/loader/entries.srel" if [ "$ENTRIES_SREL" = "type1" ]; then # The loader/entries.srel file clearly indicates that the installed # boot loader implements the proper standard upstream boot loader # spec for Type #1 entries. Let's default to that, then. layout="bls" else # The loader/entries.srel file indicates some other spec is # implemented and owns the /loader/entries/ directory. Since we # have no idea what that means, let's stay away from it by default. layout="other" fi [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \ echo "$BOOT_ROOT/loader/entries.srel with '$ENTRIES_SREL' found, using layout=$layout" elif [ -d "$BOOT_ROOT/$ENTRY_TOKEN" ]; then # If the metadata in $BOOT_ROOT doesn't tell us anything, then check if # the entry token directory already exists. If so, let's assume it's # the standard boot loader spec, too. layout="bls" log_verbose "$BOOT_ROOT/$ENTRY_TOKEN exists, using layout=$layout" else # There's no metadata in $BOOT_ROOT, and apparently no entry token # directory installed? Then we really don't know anything. layout="other" log_verbose "Entry-token directory not found, using layout=$layout" fi fi ENTRY_DIR_ABS="$BOOT_ROOT/$ENTRY_TOKEN/$KERNEL_VERSION" log_verbose "Using ENTRY_DIR_ABS=$ENTRY_DIR_ABS" # Provide a directory where to store generated initrds cleanup() { [ -n "$KERNEL_INSTALL_STAGING_AREA" ] && rm -rf "$KERNEL_INSTALL_STAGING_AREA" } trap cleanup EXIT KERNEL_INSTALL_STAGING_AREA="$(mktemp -d -t kernel-install.staging.XXXXXXX)" export KERNEL_INSTALL_MACHINE_ID="$MACHINE_ID" export KERNEL_INSTALL_ENTRY_TOKEN="$ENTRY_TOKEN" export KERNEL_INSTALL_BOOT_ROOT="$BOOT_ROOT" export KERNEL_INSTALL_LAYOUT="$layout" export KERNEL_INSTALL_INITRD_GENERATOR="$initrd_generator" export KERNEL_INSTALL_STAGING_AREA MAKE_ENTRY_DIR_ABS=0 [ "$layout" = "bls" ] || MAKE_ENTRY_DIR_ABS=1 ret=0 if [ -z "$KERNEL_INSTALL_PLUGINS" ]; then KERNEL_INSTALL_PLUGINS="$( dropindirs_sort ".install" \ "/etc/kernel/install.d" \ "/usr/lib/kernel/install.d" )" fi if [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ]; then printf '%s\n' "Plugin files:" for f in $KERNEL_INSTALL_PLUGINS; do printf '%s\n' "$f" done fi case "$COMMAND" in add) if [ $# -lt 1 ]; then echo "Error: command 'add' requires a kernel image" >&2 exit 1 fi if ! [ -f "$1" ]; then echo "Error: kernel image argument $1 not a file" >&2 exit 1 fi if [ "$MAKE_ENTRY_DIR_ABS" -eq 0 ]; then # Compatibility with earlier versions that used the presence of $BOOT_ROOT/$ENTRY_TOKEN # to signal to 00-entry-directory to create $ENTRY_DIR_ABS # to serve as the indication to use or to not use the BLS if [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ]; then echo "+mkdir -v -p $ENTRY_DIR_ABS" mkdir -v -p "$ENTRY_DIR_ABS" || exit 1 else mkdir -p "$ENTRY_DIR_ABS" || exit 1 fi fi for f in $KERNEL_INSTALL_PLUGINS; do log_verbose "+$f add $KERNEL_VERSION $ENTRY_DIR_ABS" "$@" err=0 "$f" add "$KERNEL_VERSION" "$ENTRY_DIR_ABS" "$@" || err=$? [ $err -eq $skip_remaining ] && break [ $err -ne 0 ] && exit $err done ;; remove) for f in $KERNEL_INSTALL_PLUGINS; do log_verbose "+$f remove $KERNEL_VERSION $ENTRY_DIR_ABS" err=0 "$f" remove "$KERNEL_VERSION" "$ENTRY_DIR_ABS" || err=$? [ $err -eq $skip_remaining ] && break [ $err -ne 0 ] && exit $err done if [ "$MAKE_ENTRY_DIR_ABS" -eq 0 ]; then log_verbose "Removing $ENTRY_DIR_ABS/" rm -rf "$ENTRY_DIR_ABS" fi ;; inspect) echo "KERNEL_INSTALL_MACHINE_ID: $KERNEL_INSTALL_MACHINE_ID" echo "KERNEL_INSTALL_ENTRY_TOKEN: $KERNEL_INSTALL_ENTRY_TOKEN" echo "KERNEL_INSTALL_BOOT_ROOT: $KERNEL_INSTALL_BOOT_ROOT" echo "KERNEL_INSTALL_LAYOUT: $KERNEL_INSTALL_LAYOUT" echo "KERNEL_INSTALL_INITRD_GENERATOR: $KERNEL_INSTALL_INITRD_GENERATOR" echo "ENTRY_DIR_ABS: $KERNEL_INSTALL_BOOT_ROOT/$ENTRY_TOKEN/\$KERNEL_VERSION" # Assert that ENTRY_DIR_ABS actually matches what we are printing here [ "${ENTRY_DIR_ABS%/*}" = "$KERNEL_INSTALL_BOOT_ROOT/$ENTRY_TOKEN" ] || { echo "Assertion didn't pass." >&2; exit 1; } ;; *) echo "Error: unknown command '$COMMAND'" >&2 exit 1 ;; esac exit "$ret"