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dracut-init.sh
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dracut-init.sh
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#!/bin/bash
#
# functions used only by dracut and dracut modules
#
# Copyright 2005-2009 Red Hat, Inc. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
export LC_MESSAGES=C
if [[ $EUID == "0" ]] && ! [[ $DRACUT_NO_XATTR ]]; then
export DRACUT_CP="cp --reflink=auto --sparse=auto --preserve=mode,timestamps,xattr,links -dfr"
else
export DRACUT_CP="cp --reflink=auto --sparse=auto --preserve=mode,timestamps,links -dfr"
fi
# is_func <command>
# Check whether $1 is a function.
is_func() {
[[ "$(type -t "$1")" == "function" ]]
}
if ! [[ $dracutbasedir ]]; then
dracutbasedir=${BASH_SOURCE[0]%/*}
[[ $dracutbasedir == dracut-functions* ]] && dracutbasedir="."
[[ $dracutbasedir ]] || dracutbasedir="."
dracutbasedir="$(readlink -f $dracutbasedir)"
fi
if ! is_func dinfo > /dev/null 2>&1; then
# shellcheck source=./dracut-logger.sh
. "$dracutbasedir/dracut-logger.sh"
dlog_init
fi
# shellcheck disable=SC2154
if ! [[ $initdir ]]; then
dfatal "initdir not set"
exit 1
fi
if ! [[ -d $initdir ]]; then
mkdir -p "$initdir"
fi
if ! [[ $kernel ]]; then
kernel=$(uname -r)
export kernel
fi
# shellcheck disable=SC2154
srcmods="$dracutsysrootdir/lib/modules/$kernel/"
# shellcheck disable=SC2154
[[ $drivers_dir ]] && {
if ! command -v kmod &> /dev/null && vercmp "$(modprobe --version | cut -d' ' -f3)" lt 3.7; then
dfatal 'To use --kmoddir option module-init-tools >= 3.7 is required.'
exit 1
fi
srcmods="$drivers_dir"
}
export srcmods
# export standard hookdirs
[[ $hookdirs ]] || {
hookdirs="cmdline pre-udev pre-trigger netroot "
hookdirs+="initqueue initqueue/settled initqueue/online initqueue/finished initqueue/timeout "
hookdirs+="pre-mount pre-pivot cleanup mount "
hookdirs+="emergency shutdown-emergency pre-shutdown shutdown "
export hookdirs
}
DRACUT_LDD=${DRACUT_LDD:-ldd}
DRACUT_TESTBIN=${DRACUT_TESTBIN:-/bin/sh}
DRACUT_LDCONFIG=${DRACUT_LDCONFIG:-ldconfig}
# shellcheck source=./dracut-functions.sh
. "$dracutbasedir"/dracut-functions.sh
# Detect lib paths
if ! [[ $libdirs ]]; then
if [[ $("$DRACUT_LDD" "$dracutsysrootdir$DRACUT_TESTBIN") == */lib64/* ]] &> /dev/null \
&& [[ -d $dracutsysrootdir/lib64 ]]; then
libdirs+=" /lib64"
[[ -d $dracutsysrootdir/usr/lib64 ]] && libdirs+=" /usr/lib64"
else
libdirs+=" /lib"
[[ -d $dracutsysrootdir/usr/lib ]] && libdirs+=" /usr/lib"
fi
libdirs+=" $(ldconfig_paths)"
export libdirs
fi
# ldd needs LD_LIBRARY_PATH pointing to the libraries within the sysroot directory
if [[ -n $dracutsysrootdir ]]; then
for lib in $libdirs; do
LD_LIBRARY_PATH="${LD_LIBRARY_PATH:+"$LD_LIBRARY_PATH":}$dracutsysrootdir$lib"
done
export LD_LIBRARY_PATH
fi
# helper function for check() in module-setup.sh
# to check for required installed binaries
# issues a standardized warning message
require_binaries() {
# shellcheck disable=SC2154
local _module_name="${moddir##*/}"
local _ret=0
if [[ $1 == "-m" ]]; then
_module_name="$2"
shift 2
fi
for cmd in "$@"; do
if ! find_binary "$cmd" &> /dev/null; then
dinfo "Module '${_module_name#[0-9][0-9]}' will not be installed, because command '$cmd' could not be found!"
((_ret++))
fi
done
return "$_ret"
}
require_any_binary() {
local _module_name="${moddir##*/}"
local _ret=1
if [[ $1 == "-m" ]]; then
_module_name="$2"
shift 2
fi
for cmd in "$@"; do
if find_binary "$cmd" &> /dev/null; then
_ret=0
break
fi
done
if ((_ret != 0)); then
dinfo "$_module_name: Could not find any command of '$*'!"
return 1
fi
return 0
}
# helper function for check() in module-setup.sh
# to check for required kernel modules
# issues a standardized warning message
require_kernel_modules() {
# shellcheck disable=SC2154
local _module_name="${moddir##*/}"
local _ret=0
# Ignore kernel module requirement for no-kernel build
[[ $no_kernel == yes ]] && return 0
if [[ $1 == "-m" ]]; then
_module_name="$2"
shift 2
fi
for mod in "$@"; do
if ! check_kernel_module "$mod" &> /dev/null; then
dinfo "Module '${_module_name#[0-9][0-9]}' will not be installed, because kernel module '$mod' is not available!"
((_ret++))
fi
done
return "$_ret"
}
dracut_need_initqueue() {
: > "$initdir/lib/dracut/need-initqueue"
}
dracut_module_included() {
# shellcheck disable=SC2154
[[ " $mods_to_load $modules_loaded " == *\ $*\ * ]]
}
dracut_no_switch_root() {
: > "$initdir/lib/dracut/no-switch-root"
}
dracut_module_path() {
local _dir
# shellcheck disable=SC2231
for _dir in "${dracutbasedir}"/modules.d/??${1}; do
echo "$_dir"
return 0
done
return 1
}
if ! [[ $DRACUT_INSTALL ]]; then
DRACUT_INSTALL=$(find_binary dracut-install)
fi
if ! [[ $DRACUT_INSTALL ]] && [[ -x $dracutbasedir/dracut-install ]]; then
DRACUT_INSTALL=$dracutbasedir/dracut-install
elif ! [[ $DRACUT_INSTALL ]] && [[ -x $dracutbasedir/src/install/dracut-install ]]; then
DRACUT_INSTALL=$dracutbasedir/src/install/dracut-install
fi
# Test if dracut-install is a standalone executable with no options.
# E.g. DRACUT_INSTALL may be set externally as:
# DRACUT_INSTALL="valgrind dracut-install"
# or
# DRACUT_INSTALL="dracut-install --debug"
# in which case the string cannot be tested for being executable.
DRINSTALLPARTS=0
for i in $DRACUT_INSTALL; do
DRINSTALLPARTS=$((DRINSTALLPARTS + 1))
done
if [[ $DRINSTALLPARTS == 1 ]] && ! command -v "$DRACUT_INSTALL" > /dev/null 2>&1; then
dfatal "dracut-install not found!"
exit 10
fi
if [[ $hostonly == "-h" ]]; then
if ! [[ $DRACUT_KERNEL_MODALIASES ]] || ! [[ -f $DRACUT_KERNEL_MODALIASES ]]; then
export DRACUT_KERNEL_MODALIASES="${DRACUT_TMPDIR}/modaliases"
$DRACUT_INSTALL ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${srcmods:+--kerneldir "$srcmods"} --modalias > "$DRACUT_KERNEL_MODALIASES"
fi
fi
[[ $DRACUT_RESOLVE_LAZY ]] || export DRACUT_RESOLVE_DEPS=1
inst_dir() {
local _ret
[[ -e ${initdir}/"$1" ]] && return 0 # already there
if $DRACUT_INSTALL ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} -d "$@"; then
return 0
else
_ret=$?
derror FAILED: "$DRACUT_INSTALL" ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} -d "$@"
return $_ret
fi
}
inst() {
local _ret _hostonly_install
if [[ $1 == "-H" ]]; then
_hostonly_install="-H"
shift
fi
[[ -e ${initdir}/"${2:-$1}" ]] && return 0 # already there
if $DRACUT_INSTALL ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"; then
return 0
else
_ret=$?
derror FAILED: "$DRACUT_INSTALL" ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"
return $_ret
fi
}
inst_simple() {
local _ret _hostonly_install
if [[ $1 == "-H" ]]; then
_hostonly_install="-H"
shift
fi
[[ -e ${initdir}/"${2:-$1}" ]] && return 0 # already there
[[ -e $1 ]] || return 1 # no source
if $DRACUT_INSTALL ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${_hostonly_install:+-H} "$@"; then
return 0
else
_ret=$?
derror FAILED: "$DRACUT_INSTALL" ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${_hostonly_install:+-H} "$@"
return $_ret
fi
}
inst_symlink() {
local _ret _hostonly_install
if [[ $1 == "-H" ]]; then
_hostonly_install="-H"
shift
fi
[[ -e ${initdir}/"${2:-$1}" ]] && return 0 # already there
[[ -L $1 ]] || return 1
if $DRACUT_INSTALL ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"; then
return 0
else
_ret=$?
derror FAILED: "$DRACUT_INSTALL" ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"
return $_ret
fi
}
inst_multiple() {
local _ret _hostonly_install
if [[ $1 == "-H" ]]; then
_hostonly_install="-H"
shift
fi
if $DRACUT_INSTALL ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} -a ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"; then
return 0
else
_ret=$?
derror FAILED: "$DRACUT_INSTALL" ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} -a ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"
return $_ret
fi
}
dracut_install() {
inst_multiple "$@"
}
dracut_instmods() {
local _ret _silent=0
local i
# shellcheck disable=SC2154
[[ $no_kernel == yes ]] && return
for i in "$@"; do
[[ $i == "--silent" ]] && _silent=1
done
if $DRACUT_INSTALL \
${dracutsysrootdir:+-r "$dracutsysrootdir"} \
${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${hostonly:+-H} ${check_supported:+--check-supported} ${omit_drivers:+-N "$omit_drivers"} ${srcmods:+--kerneldir "$srcmods"} -m "$@"; then
return 0
else
_ret=$?
if ((_silent == 0)); then
derror FAILED: "$DRACUT_INSTALL" ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${hostonly:+-H} ${check_supported:+--check-supported} ${omit_drivers:+-N "$omit_drivers"} ${srcmods:+--kerneldir "$srcmods"} -m "$@"
fi
return $_ret
fi
}
inst_library() {
local _ret _hostonly_install
if [[ $1 == "-H" ]]; then
_hostonly_install="-H"
shift
fi
[[ -e ${initdir}/"${2:-$1}" ]] && return 0 # already there
[[ -e $1 ]] || return 1 # no source
if $DRACUT_INSTALL ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"; then
return 0
else
_ret=$?
derror FAILED: "$DRACUT_INSTALL" ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"
return $_ret
fi
}
inst_binary() {
local _ret
if $DRACUT_INSTALL ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} "$@"; then
return 0
else
_ret=$?
derror FAILED: "$DRACUT_INSTALL" ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} "$@"
return $_ret
fi
}
inst_script() {
local _ret
if $DRACUT_INSTALL ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} "$@"; then
return 0
else
_ret=$?
derror FAILED: "$DRACUT_INSTALL" ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} "$@"
return $_ret
fi
}
inst_fsck_help() {
local _ret _helper="/run/dracut/fsck/fsck_help_$1.txt"
if $DRACUT_INSTALL ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} "$2" "$_helper"; then
return 0
else
_ret=$?
derror "$DRACUT_INSTALL" ${dracutsysrootdir:+-r "$dracutsysrootdir"} ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} "$2" "$_helper"
return $_ret
fi
}
# Use with form hostonly="$(optional_hostonly)" inst_xxxx <args>
# If hostonly mode is set to "strict", hostonly restrictions will still
# be applied, else will ignore hostonly mode and try to install all
# given modules.
optional_hostonly() {
# shellcheck disable=SC2154
if [[ $hostonly_mode == "strict" ]]; then
printf -- "%s" "$hostonly"
else
printf ""
fi
}
mark_hostonly() {
for i in "$@"; do
echo "$i" >> "$initdir/lib/dracut/hostonly-files"
done
}
# find symlinks linked to given library file
# $1 = library file
# Function searches for symlinks by stripping version numbers appended to
# library filename, checks if it points to the same target and finally
# prints the list of symlinks to stdout.
#
# Example:
# rev_lib_symlinks libfoo.so.8.1
# output: libfoo.so.8 libfoo.so
# (Only if libfoo.so.8 and libfoo.so exists on host system.)
rev_lib_symlinks() {
local _fn
local _orig
local _links
[[ ! $1 ]] && return 0
_fn="$1"
_orig="$(readlink -f "$1")"
_links=()
[[ ${_fn} == *.so.* ]] || return 1
until [[ ${_fn##*.} == so ]]; do
_fn="${_fn%.*}"
[[ -L ${_fn} ]] && [[ $(readlink -f "${_fn}") == "${_orig}" ]] && _links+=("${_fn}")
done
echo "${_links[*]}}"
}
# attempt to install any programs specified in a udev rule
inst_rule_programs() {
local _prog _bin
# shellcheck disable=SC2013
for _prog in $(sed -nr 's/.*PROGRAM==?"([^ "]+).*/\1/p' "$1"); do
_bin=""
# shellcheck disable=SC2154
if [[ -x ${udevdir}/$_prog ]]; then
_bin="${udevdir}"/$_prog
elif [[ ${_prog/\$env\{/} == "$_prog" ]]; then
_bin=$(find_binary "$_prog") || {
dinfo "Skipping program $_prog using in udev rule ${1##*/} as it cannot be found"
continue
}
fi
[[ $_bin ]] && inst_binary "$_bin"
done
# shellcheck disable=SC2013
for _prog in $(sed -nr 's/.*RUN[+=]=?"([^ "]+).*/\1/p' "$1"); do
_bin=""
if [[ -x ${udevdir}/$_prog ]]; then
_bin=${udevdir}/$_prog
elif [[ ${_prog/\$env\{/} == "$_prog" ]] && [[ ${_prog} != "/sbin/initqueue" ]]; then
_bin=$(find_binary "$_prog") || {
dinfo "Skipping program $_prog using in udev rule ${1##*/} as it cannot be found"
continue
}
fi
[[ $_bin ]] && inst_binary "$_bin"
done
# shellcheck disable=SC2013
for _prog in $(sed -nr 's/.*IMPORT\{program\}==?"([^ "]+).*/\1/p' "$1"); do
_bin=""
if [[ -x ${udevdir}/$_prog ]]; then
_bin=${udevdir}/$_prog
elif [[ ${_prog/\$env\{/} == "$_prog" ]]; then
_bin=$(find_binary "$_prog") || {
dinfo "Skipping program $_prog using in udev rule ${1##*/} as it cannot be found"
continue
}
fi
[[ $_bin ]] && dracut_install "$_bin"
done
}
# attempt to create any groups and users specified in a udev rule
inst_rule_group_owner() {
local i
# shellcheck disable=SC2013
for i in $(sed -nr 's/.*OWNER=?"([^ "]+).*/\1/p' "$1"); do
if ! grep -Eq "^$i:" "$initdir/etc/passwd" 2> /dev/null; then
grep -E "^$i:" "$dracutsysrootdir"/etc/passwd 2> /dev/null >> "$initdir/etc/passwd"
fi
done
# shellcheck disable=SC2013
for i in $(sed -nr 's/.*GROUP=?"([^ "]+).*/\1/p' "$1"); do
if ! grep -Eq "^$i:" "$initdir/etc/group" 2> /dev/null; then
grep -E "^$i:" "$dracutsysrootdir"/etc/group 2> /dev/null >> "$initdir/etc/group"
fi
done
}
inst_rule_initqueue() {
if grep -q -F initqueue "$1"; then
dracut_need_initqueue
fi
}
# udev rules always get installed in the same place, so
# create a function to install them to make life simpler.
inst_rules() {
local _target=/etc/udev/rules.d _rule _found
inst_dir "${udevdir}/rules.d"
inst_dir "$_target"
for _rule in "$@"; do
if [ "${_rule#/}" = "$_rule" ]; then
for r in "$dracutsysrootdir${udevdir}/rules.d" ${hostonly:+"$dracutsysrootdir"/etc/udev/rules.d}; do
[[ -e $r/$_rule ]] || continue
_found="$r/$_rule"
inst_rule_programs "$_found"
inst_rule_group_owner "$_found"
inst_rule_initqueue "$_found"
inst_simple "$_found"
done
fi
for r in '' "$dracutsysrootdir$dracutbasedir/rules.d/"; do
# skip rules without an absolute path
[[ "${r}$_rule" != /* ]] && continue
[[ -f ${r}$_rule ]] || continue
_found="${r}$_rule"
inst_rule_programs "$_found"
inst_rule_group_owner "$_found"
inst_rule_initqueue "$_found"
inst_simple "$_found" "$_target/${_found##*/}"
done
[[ $_found ]] || ddebug "Skipping udev rule: $_rule"
done
}
inst_rules_wildcard() {
local _target=/etc/udev/rules.d _rule _found
inst_dir "${udevdir}/rules.d"
inst_dir "$_target"
for _rule in ${udevdir}/rules.d/$1 ${dracutbasedir}/rules.d/$1; do
[[ -e $_rule ]] || continue
inst_rule_programs "$_rule"
inst_rule_group_owner "$_rule"
inst_rule_initqueue "$_rule"
inst_simple "$_rule"
_found=$_rule
done
if [[ -n ${hostonly} ]]; then
for _rule in ${_target}/$1; do
[[ -f $_rule ]] || continue
inst_rule_programs "$_rule"
inst_rule_group_owner "$_rule"
inst_rule_initqueue "$_rule"
inst_simple "$_rule"
_found=$_rule
done
fi
[[ $_found ]] || ddebug "Skipping udev rule: $_rule"
}
# make sure that library links are correct and up to date
build_ld_cache() {
for f in "$dracutsysrootdir"/etc/ld.so.conf "$dracutsysrootdir"/etc/ld.so.conf.d/*; do
[[ -f $f ]] && inst_simple "${f#"$dracutsysrootdir"}"
done
if ! $DRACUT_LDCONFIG -r "$initdir" -f /etc/ld.so.conf; then
if [[ $EUID == 0 ]]; then
derror "ldconfig exited ungracefully"
else
derror "ldconfig might need uid=0 (root) for chroot()"
fi
fi
}
prepare_udev_rules() {
if [ -z "$UDEVVERSION" ]; then
UDEVVERSION=$(udevadm --version)
export UDEVVERSION
fi
if [ -z "$UDEVVERSION" ]; then
derror "Failed to detect udev version!"
return 1
fi
if [ -z "${UDEVVERSION##*[!0-9]*}" ]; then
derror "udevadm --version did not report an integer, udev version cannot be determined!"
return 1
fi
for f in "$@"; do
f="${initdir}/etc/udev/rules.d/$f"
[ -e "$f" ] || continue
while read -r line || [ -n "$line" ]; do
if [ "${line%%IMPORT PATH_ID}" != "$line" ]; then
if ((UDEVVERSION >= 174)); then
printf '%sIMPORT{builtin}="path_id"\n' "${line%%IMPORT PATH_ID}"
else
printf '%sIMPORT{program}="path_id %%p"\n' "${line%%IMPORT PATH_ID}"
fi
elif [ "${line%%IMPORT BLKID}" != "$line" ]; then
if ((UDEVVERSION >= 176)); then
printf '%sIMPORT{builtin}="blkid"\n' "${line%%IMPORT BLKID}"
else
# shellcheck disable=SC2016
printf '%sIMPORT{program}="/sbin/blkid -o udev -p $tempnode"\n' "${line%%IMPORT BLKID}"
fi
else
echo "$line"
fi
done < "${f}" > "${f}.new"
mv "${f}.new" "$f"
done
}
# install function specialized for hooks
# $1 = type of hook, $2 = hook priority (lower runs first), $3 = hook
# All hooks should be POSIX/SuS compliant, they will be sourced by init.
inst_hook() {
local hook
if ! [[ -f $3 ]]; then
dfatal "Cannot install a hook ($3) that does not exist."
dfatal "Aborting initrd creation."
exit 1
elif ! [[ $hookdirs == *$1* ]]; then
dfatal "No such hook type $1. Aborting initrd creation."
exit 1
fi
hook="/var/lib/dracut/hooks/${1}/${2}-${3##*/}"
inst_simple "$3" "$hook"
chmod u+x "$initdir/$hook"
}
# install any of listed files
#
# If first argument is '-d' and second some destination path, first accessible
# source is installed into this path, otherwise it will installed in the same
# path as source. If none of listed files was installed, function return 1.
# On first successful installation it returns with 0 status.
#
# Example:
#
# inst_any -d /bin/foo /bin/bar /bin/baz
#
# Lets assume that /bin/baz exists, so it will be installed as /bin/foo in
# initramfs.
inst_any() {
local to f
[[ $1 == '-d' ]] && to="$2" && shift 2
for f in "$@"; do
[[ -e $f ]] || continue
[[ $to ]] && inst "$f" "$to" && return 0
inst "$f" && return 0
done
return 1
}
# inst_libdir_dir <dir> [<dir>...]
# Install a <dir> located on a lib directory to the initramfs image
inst_libdir_dir() {
local -a _dirs
for _dir in $libdirs; do
for _i in "$@"; do
for _d in "$dracutsysrootdir$_dir"/$_i; do
[[ -d $_d ]] && _dirs+=("${_d#"$dracutsysrootdir"}")
done
done
done
for _dir in "${_dirs[@]}"; do
inst_dir "$_dir"
done
}
# inst_libdir_file [-n <pattern>] <file> [<file>...]
# Install a <file> located on a lib directory to the initramfs image
# -n <pattern> install matching files
inst_libdir_file() {
local -a _files
if [[ $1 == "-n" ]]; then
local _pattern=$2
shift 2
for _dir in $libdirs; do
for _i in "$@"; do
for _f in "$dracutsysrootdir$_dir"/$_i; do
[[ ${_f#"$dracutsysrootdir"} =~ $_pattern ]] || continue
[[ -e $_f ]] && _files+=("${_f#"$dracutsysrootdir"}")
done
done
done
else
for _dir in $libdirs; do
for _i in "$@"; do
for _f in "$dracutsysrootdir$_dir"/$_i; do
[[ -e $_f ]] && _files+=("${_f#"$dracutsysrootdir"}")
done
done
done
fi
[[ ${#_files[@]} -gt 0 ]] && inst_multiple "${_files[@]}"
}
# get a command to decompress the given file
get_decompress_cmd() {
case "$1" in
*.gz) echo 'gzip -f -d' ;;
*.bz2) echo 'bzip2 -d' ;;
*.xz) echo 'xz -f -d' ;;
*.zst) echo 'zstd -f -d ' ;;
esac
}
# install function decompressing the target and handling symlinks
# $@ = list of compressed (gz or bz2) files or symlinks pointing to such files
#
# Function install targets in the same paths inside overlay but decompressed
# and without extensions (.gz, .bz2).
inst_decompress() {
local _src _cmd
for _src in "$@"; do
_cmd=$(get_decompress_cmd "${_src}")
[[ -z ${_cmd} ]] && return 1
inst_simple "${_src}"
# Decompress with chosen tool. We assume that tool changes name e.g.
# from 'name.gz' to 'name'.
${_cmd} "${initdir}${_src#"$dracutsysrootdir"}"
done
}
# It's similar to above, but if file is not compressed, performs standard
# install.
# $@ = list of files
inst_opt_decompress() {
local _src
for _src in "$@"; do
inst_decompress "${_src}" || inst "${_src}"
done
}
# module_check <dracut module> [<forced>] [<module path>]
# execute the check() function of module-setup.sh of <dracut module>
# or the "check" script, if module-setup.sh is not found
# "check $hostonly" is called
module_check() {
local _moddir=$3
local _ret
local _forced=0
local _hostonly=$hostonly
[[ -z $_moddir ]] && _moddir=$(dracut_module_path "$1")
[ $# -ge 2 ] && _forced=$2
[[ -d $_moddir ]] || return 1
if [[ ! -f $_moddir/module-setup.sh ]]; then
# if we do not have a check script, we are unconditionally included
[[ -x $_moddir/check ]] || return 0
[[ $_forced != 0 ]] && unset hostonly
# don't quote $hostonly to leave argument empty
# shellcheck disable=SC2086
"$_moddir"/check $hostonly
_ret=$?
else
unset check depends cmdline install installkernel
check() { true; }
# shellcheck disable=SC1090
. "$_moddir"/module-setup.sh
is_func check || return 0
[[ $_forced != 0 ]] && unset hostonly
# don't quote $hostonly to leave argument empty
# shellcheck disable=SC2086
moddir="$_moddir" check $hostonly
_ret=$?
unset check depends cmdline install installkernel
fi
hostonly=$_hostonly
return $_ret
}
# module_check_mount <dracut module> [<module path>]
# execute the check() function of module-setup.sh of <dracut module>
# or the "check" script, if module-setup.sh is not found
# "mount_needs=1 check 0" is called
module_check_mount() {
local _moddir=$2
local _ret
export mount_needs=1
[[ -z $_moddir ]] && _moddir=$(dracut_module_path "$1")
[[ -d $_moddir ]] || return 1
if [[ ! -f $_moddir/module-setup.sh ]]; then
# if we do not have a check script, we are unconditionally included
[[ -x $_moddir/check ]] || return 0
mount_needs=1 "$_moddir"/check 0
_ret=$?
else
unset check depends cmdline install installkernel
check() { false; }
# shellcheck disable=SC1090
. "$_moddir"/module-setup.sh
moddir=$_moddir check 0
_ret=$?
unset check depends cmdline install installkernel
fi
unset mount_needs
return "$_ret"
}
# module_depends <dracut module> [<module path>]
# execute the depends() function of module-setup.sh of <dracut module>
# or the "depends" script, if module-setup.sh is not found
module_depends() {
local _moddir=$2
local _ret
[[ -z $_moddir ]] && _moddir=$(dracut_module_path "$1")
[[ -d $_moddir ]] || return 1
if [[ ! -f $_moddir/module-setup.sh ]]; then
# if we do not have a check script, we have no deps
[[ -x $_moddir/check ]] || return 0
"$_moddir"/check -d
return $?
else
unset check depends cmdline install installkernel
depends() { true; }
# shellcheck disable=SC1090
. "$_moddir"/module-setup.sh
moddir=$_moddir depends
_ret=$?
unset check depends cmdline install installkernel
return $_ret
fi
}
# module_cmdline <dracut module> [<module path>]
# execute the cmdline() function of module-setup.sh of <dracut module>
# or the "cmdline" script, if module-setup.sh is not found
module_cmdline() {
local _moddir=$2
local _ret
[[ -z $_moddir ]] && _moddir=$(dracut_module_path "$1")
[[ -d $_moddir ]] || return 1
if [[ ! -f $_moddir/module-setup.sh ]]; then
# shellcheck disable=SC1090
[[ -x $_moddir/cmdline ]] && . "$_moddir/cmdline"
return $?
else
unset check depends cmdline install installkernel
cmdline() { true; }
# shellcheck disable=SC1090
. "$_moddir"/module-setup.sh
moddir="$_moddir" cmdline
_ret=$?
unset check depends cmdline install installkernel
return $_ret
fi
}
# module_install <dracut module> [<module path>]
# execute the install() function of module-setup.sh of <dracut module>
# or the "install" script, if module-setup.sh is not found
module_install() {
local _moddir=$2
local _ret
[[ -z $_moddir ]] && _moddir=$(dracut_module_path "$1")
[[ -d $_moddir ]] || return 1
if [[ ! -f $_moddir/module-setup.sh ]]; then
# shellcheck disable=SC1090
[[ -x $_moddir/install ]] && . "$_moddir/install"
return $?
else
unset check depends cmdline install installkernel
install() { true; }
# shellcheck disable=SC1090
. "$_moddir"/module-setup.sh
moddir="$_moddir" install
_ret=$?
unset check depends cmdline install installkernel
return $_ret
fi
}
# module_installkernel <dracut module> [<module path>]
# execute the installkernel() function of module-setup.sh of <dracut module>
# or the "installkernel" script, if module-setup.sh is not found
module_installkernel() {
local _moddir=$2
local _ret
[[ -z $_moddir ]] && _moddir=$(dracut_module_path "$1")
[[ -d $_moddir ]] || return 1
if [[ ! -f $_moddir/module-setup.sh ]]; then
# shellcheck disable=SC1090
[[ -x $_moddir/installkernel ]] && . "$_moddir/installkernel"
return $?
else
unset check depends cmdline install installkernel
installkernel() { true; }
# shellcheck disable=SC1090
. "$_moddir"/module-setup.sh
moddir="$_moddir" installkernel
_ret=$?
unset check depends cmdline install installkernel
return $_ret
fi
}
# check_mount <dracut module> [<use_as_dep>] [<module path>]
# check_mount checks, if a dracut module is needed for the given
# device and filesystem types in "${host_fs_types[@]}"
check_mount() {
local _mod=$1
local _moddir=$3
local _ret
local _moddep
[[ -z $_moddir ]] && _moddir=$(dracut_module_path "$1")
# shellcheck disable=SC2154
[ "${#host_fs_types[@]}" -le 0 ] && return 1
# If we are already scheduled to be loaded, no need to check again.
[[ " $mods_to_load " == *\ $_mod\ * ]] && return 0
[[ " $mods_checked_as_dep " == *\ $_mod\ * ]] && return 1
# This should never happen, but...
[[ -d $_moddir ]] || return 1
[[ $2 ]] || mods_checked_as_dep+=" $_mod "
# shellcheck disable=SC2154
if [[ " $omit_dracutmodules " == *\ $_mod\ * ]]; then
return 1
fi
if [[ " $dracutmodules $add_dracutmodules $force_add_dracutmodules" == *\ $_mod\ * ]]; then
module_check_mount "$_mod" "$_moddir"
_ret=$?
# explicit module, so also accept _ret=255
[[ $_ret == 0 || $_ret == 255 ]] || return 1
else
# module not in our list
if [[ $dracutmodules == all ]]; then
# check, if we can and should install this module
module_check_mount "$_mod" "$_moddir" || return 1
else
# skip this module
return 1
fi
fi
for _moddep in $(module_depends "$_mod" "$_moddir"); do
# handle deps as if they were manually added
[[ " $dracutmodules " == *\ $_mod\ * ]] \
&& [[ " $dracutmodules " != *\ $_moddep\ * ]] \
&& dracutmodules+=" $_moddep "
[[ " $add_dracutmodules " == *\ $_mod\ * ]] \
&& [[ " $add_dracutmodules " != *\ $_moddep\ * ]] \
&& add_dracutmodules+=" $_moddep "
[[ " $force_add_dracutmodules " == *\ $_mod\ * ]] \
&& [[ " $force_add_dracutmodules " != *\ $_moddep\ * ]] \
&& force_add_dracutmodules+=" $_moddep "
# if a module we depend on fail, fail also
if ! check_module "$_moddep"; then
derror "Module '$_mod' depends on '$_moddep', which can't be installed"
return 1
fi
done
[[ " $mods_to_load " == *\ $_mod\ * ]] \
|| mods_to_load+=" $_mod "
return 0
}
# check_module <dracut module> [<use_as_dep>] [<module path>]
# check if a dracut module is to be used in the initramfs process
# if <use_as_dep> is set, then the process also keeps track
# that the modules were checked for the dependency tracking process
check_module() {
local _mod=$1
local _moddir=$3
local _ret