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+#!/bin/bash
+#
+# functions used by dracut and other tools.
+#
+# 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
+
+# is_func <command>
+# Check whether $1 is a function.
+is_func() {
+ [[ "$(type -t "$1")" == "function" ]]
+}
+
+# Generic substring function. If $2 is in $1, return 0.
+strstr() { [[ $1 == *"$2"* ]]; }
+# Generic glob matching function. If glob pattern $2 matches anywhere in $1, OK
+strglobin() { [[ $1 == *$2* ]]; }
+# Generic glob matching function. If glob pattern $2 matches all of $1, OK
+# shellcheck disable=SC2053
+strglob() { [[ $1 == $2 ]]; }
+# returns OK if $1 contains literal string $2 at the beginning, and isn't empty
+str_starts() { [ "${1#"$2"*}" != "$1" ]; }
+# returns OK if $1 contains literal string $2 at the end, and isn't empty
+str_ends() { [ "${1%*"$2"}" != "$1" ]; }
+
+trim() {
+ local var="$*"
+ var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters
+ var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters
+ printf "%s" "$var"
+}
+
+# find a binary. If we were not passed the full path directly,
+# search in the usual places to find the binary.
+find_binary() {
+ local _delim
+ local _path
+ local l
+ local p
+ [[ -z ${1##/*} ]] || _delim="/"
+
+ if [[ $1 == *.so* ]]; then
+ for l in $libdirs; do
+ _path="${l}${_delim}${1}"
+ if { $DRACUT_LDD "${dracutsysrootdir}${_path}" &> /dev/null; }; then
+ printf "%s\n" "${_path}"
+ return 0
+ fi
+ done
+ _path="${_delim}${1}"
+ if { $DRACUT_LDD "${dracutsysrootdir}${_path}" &> /dev/null; }; then
+ printf "%s\n" "${_path}"
+ return 0
+ fi
+ fi
+ if [[ $1 == */* ]]; then
+ _path="${_delim}${1}"
+ if [[ -L ${dracutsysrootdir}${_path} ]] || [[ -x ${dracutsysrootdir}${_path} ]]; then
+ printf "%s\n" "${_path}"
+ return 0
+ fi
+ fi
+ for p in $DRACUT_PATH; do
+ _path="${p}${_delim}${1}"
+ if [[ -L ${dracutsysrootdir}${_path} ]] || [[ -x ${dracutsysrootdir}${_path} ]]; then
+ printf "%s\n" "${_path}"
+ return 0
+ fi
+ done
+
+ [[ -n $dracutsysrootdir ]] && return 1
+ type -P "${1##*/}"
+}
+
+ldconfig_paths() {
+ $DRACUT_LDCONFIG ${dracutsysrootdir:+-r ${dracutsysrootdir} -f /etc/ld.so.conf} -pN 2> /dev/null | grep -E -v '/(lib|lib64|usr/lib|usr/lib64)/[^/]*$' | sed -n 's,.* => \(.*\)/.*,\1,p' | sort | uniq
+}
+
+# Version comparison function. Assumes Linux style version scheme.
+# $1 = version a
+# $2 = comparison op (gt, ge, eq, le, lt, ne)
+# $3 = version b
+vercmp() {
+ local _n1
+ read -r -a _n1 <<< "${1//./ }"
+ local _op=$2
+ local _n2
+ read -r -a _n2 <<< "${3//./ }"
+ local _i _res
+
+ for ((_i = 0; ; _i++)); do
+ if [[ ! ${_n1[_i]}${_n2[_i]} ]]; then
+ _res=0
+ elif ((${_n1[_i]:-0} > ${_n2[_i]:-0})); then
+ _res=1
+ elif ((${_n1[_i]:-0} < ${_n2[_i]:-0})); then
+ _res=2
+ else
+ continue
+ fi
+ break
+ done
+
+ case $_op in
+ gt) ((_res == 1)) ;;
+ ge) ((_res != 2)) ;;
+ eq) ((_res == 0)) ;;
+ le) ((_res != 1)) ;;
+ lt) ((_res == 2)) ;;
+ ne) ((_res != 0)) ;;
+ esac
+}
+
+# Create all subdirectories for given path without creating the last element.
+# $1 = path
+mksubdirs() {
+ # shellcheck disable=SC2174
+ [[ -e ${1%/*} ]] || mkdir -m 0755 -p -- "${1%/*}"
+}
+
+# Function prints global variables in format name=value line by line.
+# $@ = list of global variables' name
+print_vars() {
+ local _var _value
+
+ for _var in "$@"; do
+ eval printf -v _value "%s" \""\$$_var"\"
+ [[ ${_value} ]] && printf '%s="%s"\n' "$_var" "$_value"
+ done
+}
+
+# normalize_path <path>
+# Prints the normalized path, where it removes any duplicated
+# and trailing slashes.
+# Example:
+# $ normalize_path ///test/test//
+# /test/test
+normalize_path() {
+ # shellcheck disable=SC2064
+ trap "$(shopt -p extglob)" RETURN
+ shopt -q -s extglob
+ local p=${1//+(\/)//}
+ printf "%s\n" "${p%/}"
+}
+
+# convert_abs_rel <from> <to>
+# Prints the relative path, when creating a symlink to <to> from <from>.
+# Example:
+# $ convert_abs_rel /usr/bin/test /bin/test-2
+# ../../bin/test-2
+# $ ln -s $(convert_abs_rel /usr/bin/test /bin/test-2) /usr/bin/test
+convert_abs_rel() {
+ local __current __absolute __abssize __cursize __newpath
+ local -i __i __level
+
+ set -- "$(normalize_path "$1")" "$(normalize_path "$2")"
+
+ # corner case #1 - self looping link
+ [[ $1 == "$2" ]] && {
+ printf "%s\n" "${1##*/}"
+ return
+ }
+
+ # corner case #2 - own dir link
+ [[ ${1%/*} == "$2" ]] && {
+ printf ".\n"
+ return
+ }
+
+ IFS=/ read -r -a __current <<< "$1"
+ IFS=/ read -r -a __absolute <<< "$2"
+
+ __abssize=${#__absolute[@]}
+ __cursize=${#__current[@]}
+
+ while [[ ${__absolute[__level]} == "${__current[__level]}" ]]; do
+ ((__level++))
+ if ((__level > __abssize || __level > __cursize)); then
+ break
+ fi
+ done
+
+ for ((__i = __level; __i < __cursize - 1; __i++)); do
+ if ((__i > __level)); then
+ __newpath=$__newpath"/"
+ fi
+ __newpath=$__newpath".."
+ done
+
+ for ((__i = __level; __i < __abssize; __i++)); do
+ if [[ -n $__newpath ]]; then
+ __newpath=$__newpath"/"
+ fi
+ __newpath=$__newpath${__absolute[__i]}
+ done
+
+ printf -- "%s\n" "$__newpath"
+}
+
+# get_fs_env <device>
+# Get and the ID_FS_TYPE variable from udev for a device.
+# Example:
+# $ get_fs_env /dev/sda2
+# ext4
+get_fs_env() {
+ [[ $1 ]] || return
+ unset ID_FS_TYPE
+ ID_FS_TYPE=$(blkid -u filesystem -o export -- "$1" \
+ | while read -r line || [ -n "$line" ]; do
+ if [[ $line == "TYPE="* ]]; then
+ printf "%s" "${line#TYPE=}"
+ exit 0
+ fi
+ done)
+ if [[ $ID_FS_TYPE ]]; then
+ printf "%s" "$ID_FS_TYPE"
+ return 0
+ fi
+ return 1
+}
+
+# get_maj_min <device>
+# Prints the major and minor of a device node.
+# Example:
+# $ get_maj_min /dev/sda2
+# 8:2
+get_maj_min() {
+ local _majmin
+ local _out
+
+ if [[ $get_maj_min_cache_file ]]; then
+ _out="$(grep -m1 -oE "^$1 \S+$" "$get_maj_min_cache_file" | awk '{print $NF}')"
+ fi
+
+ if ! [[ "$_out" ]]; then
+ _majmin="$(stat -L -c '%t:%T' "$1" 2> /dev/null)"
+ _out="$(printf "%s" "$((0x${_majmin%:*})):$((0x${_majmin#*:}))")"
+ if [[ $get_maj_min_cache_file ]]; then
+ echo "$1 $_out" >> "$get_maj_min_cache_file"
+ fi
+ fi
+ echo -n "$_out"
+}
+
+# get_devpath_block <device>
+# get the DEVPATH in /sys of a block device
+get_devpath_block() {
+ local _majmin _i
+ _majmin=$(get_maj_min "$1")
+
+ for _i in /sys/block/*/dev /sys/block/*/*/dev; do
+ [[ -e $_i ]] || continue
+ if [[ $_majmin == "$(< "$_i")" ]]; then
+ printf "%s" "${_i%/dev}"
+ return 0
+ fi
+ done
+ return 1
+}
+
+# get a persistent path from a device
+get_persistent_dev() {
+ local i _tmp _dev _pol
+
+ _dev=$(get_maj_min "$1")
+ [ -z "$_dev" ] && return
+
+ if [[ -n $persistent_policy ]]; then
+ _pol="/dev/disk/${persistent_policy}/*"
+ else
+ _pol=
+ fi
+
+ for i in \
+ $_pol \
+ /dev/mapper/* \
+ /dev/disk/by-uuid/* \
+ /dev/disk/by-label/* \
+ /dev/disk/by-partuuid/* \
+ /dev/disk/by-partlabel/* \
+ /dev/disk/by-id/* \
+ /dev/disk/by-path/*; do
+ [[ -e $i ]] || continue
+ [[ $i == /dev/mapper/control ]] && continue
+ [[ $i == /dev/mapper/mpath* ]] && continue
+ _tmp=$(get_maj_min "$i")
+ if [ "$_tmp" = "$_dev" ]; then
+ printf -- "%s" "$i"
+ return
+ fi
+ done
+ printf -- "%s" "$1"
+}
+
+expand_persistent_dev() {
+ local _dev=$1
+
+ case "$_dev" in
+ LABEL=*)
+ _dev="/dev/disk/by-label/${_dev#LABEL=}"
+ ;;
+ UUID=*)
+ _dev="${_dev#UUID=}"
+ _dev="${_dev,,}"
+ _dev="/dev/disk/by-uuid/${_dev}"
+ ;;
+ PARTUUID=*)
+ _dev="${_dev#PARTUUID=}"
+ _dev="${_dev,,}"
+ _dev="/dev/disk/by-partuuid/${_dev}"
+ ;;
+ PARTLABEL=*)
+ _dev="/dev/disk/by-partlabel/${_dev#PARTLABEL=}"
+ ;;
+ esac
+ printf "%s" "$_dev"
+}
+
+shorten_persistent_dev() {
+ local _dev="$1"
+ case "$_dev" in
+ /dev/disk/by-uuid/*)
+ printf "%s" "UUID=${_dev##*/}"
+ ;;
+ /dev/disk/by-label/*)
+ printf "%s" "LABEL=${_dev##*/}"
+ ;;
+ /dev/disk/by-partuuid/*)
+ printf "%s" "PARTUUID=${_dev##*/}"
+ ;;
+ /dev/disk/by-partlabel/*)
+ printf "%s" "PARTLABEL=${_dev##*/}"
+ ;;
+ *)
+ printf "%s" "$_dev"
+ ;;
+ esac
+}
+
+# find_block_device <mountpoint>
+# Prints the major and minor number of the block device
+# for a given mountpoint.
+# Unless $use_fstab is set to "yes" the functions
+# uses /proc/self/mountinfo as the primary source of the
+# information and only falls back to /etc/fstab, if the mountpoint
+# is not found there.
+# Example:
+# $ find_block_device /usr
+# 8:4
+find_block_device() {
+ local _dev _majmin _find_mpt
+ _find_mpt="$1"
+
+ if [[ $use_fstab != yes ]]; then
+ [[ -d $_find_mpt/. ]]
+ findmnt -e -v -n -o 'MAJ:MIN,SOURCE' --target "$_find_mpt" | {
+ while read -r _majmin _dev || [ -n "$_dev" ]; do
+ if [[ -b $_dev ]]; then
+ if ! [[ $_majmin ]] || [[ $_majmin == 0:* ]]; then
+ _majmin=$(get_maj_min "$_dev")
+ fi
+ if [[ $_majmin ]]; then
+ printf "%s\n" "$_majmin"
+ else
+ printf "%s\n" "$_dev"
+ fi
+ return 0
+ fi
+ if [[ $_dev == *:* ]]; then
+ printf "%s\n" "$_dev"
+ return 0
+ fi
+ done
+ return 1
+ } && return 0
+ fi
+ # fall back to /etc/fstab
+ [[ ! -f "$dracutsysrootdir"/etc/fstab ]] && return 1
+
+ findmnt -e --fstab -v -n -o 'MAJ:MIN,SOURCE' --target "$_find_mpt" | {
+ while read -r _majmin _dev || [ -n "$_dev" ]; do
+ if ! [[ $_dev ]]; then
+ _dev="$_majmin"
+ unset _majmin
+ fi
+ if [[ -b $_dev ]]; then
+ [[ $_majmin ]] || _majmin=$(get_maj_min "$_dev")
+ if [[ $_majmin ]]; then
+ printf "%s\n" "$_majmin"
+ else
+ printf "%s\n" "$_dev"
+ fi
+ return 0
+ fi
+ if [[ $_dev == *:* ]]; then
+ printf "%s\n" "$_dev"
+ return 0
+ fi
+ done
+ return 1
+ } && return 0
+
+ return 1
+}
+
+# find_mp_fstype <mountpoint>
+# Echo the filesystem type for a given mountpoint.
+# /proc/self/mountinfo is taken as the primary source of information
+# and /etc/fstab is used as a fallback.
+# No newline is appended!
+# Example:
+# $ find_mp_fstype /;echo
+# ext4
+find_mp_fstype() {
+ local _fs
+
+ if [[ $use_fstab != yes ]]; then
+ findmnt -e -v -n -o 'FSTYPE' --target "$1" | {
+ while read -r _fs || [ -n "$_fs" ]; do
+ [[ $_fs ]] || continue
+ [[ $_fs == "autofs" ]] && continue
+ printf "%s" "$_fs"
+ return 0
+ done
+ return 1
+ } && return 0
+ fi
+
+ [[ ! -f "$dracutsysrootdir"/etc/fstab ]] && return 1
+
+ findmnt --fstab -e -v -n -o 'FSTYPE' --target "$1" | {
+ while read -r _fs || [ -n "$_fs" ]; do
+ [[ $_fs ]] || continue
+ [[ $_fs == "autofs" ]] && continue
+ printf "%s" "$_fs"
+ return 0
+ done
+ return 1
+ } && return 0
+
+ return 1
+}
+
+# find_dev_fstype <device>
+# Echo the filesystem type for a given device.
+# /proc/self/mountinfo is taken as the primary source of information
+# and /etc/fstab is used as a fallback.
+# No newline is appended!
+# Example:
+# $ find_dev_fstype /dev/sda2;echo
+# ext4
+find_dev_fstype() {
+ local _find_dev _fs
+ _find_dev="$1"
+ if ! [[ $_find_dev == /dev* ]]; then
+ [[ -b "/dev/block/$_find_dev" ]] && _find_dev="/dev/block/$_find_dev"
+ fi
+
+ if [[ $use_fstab != yes ]]; then
+ findmnt -e -v -n -o 'FSTYPE' --source "$_find_dev" | {
+ while read -r _fs || [ -n "$_fs" ]; do
+ [[ $_fs ]] || continue
+ [[ $_fs == "autofs" ]] && continue
+ printf "%s" "$_fs"
+ return 0
+ done
+ return 1
+ } && return 0
+ fi
+
+ [[ ! -f "$dracutsysrootdir"/etc/fstab ]] && return 1
+
+ findmnt --fstab -e -v -n -o 'FSTYPE' --source "$_find_dev" | {
+ while read -r _fs || [ -n "$_fs" ]; do
+ [[ $_fs ]] || continue
+ [[ $_fs == "autofs" ]] && continue
+ printf "%s" "$_fs"
+ return 0
+ done
+ return 1
+ } && return 0
+
+ return 1
+}
+
+# find_mp_fsopts <mountpoint>
+# Echo the filesystem options for a given mountpoint.
+# /proc/self/mountinfo is taken as the primary source of information
+# and /etc/fstab is used as a fallback.
+# No newline is appended!
+# Example:
+# $ find_mp_fsopts /;echo
+# rw,relatime,discard,data=ordered
+find_mp_fsopts() {
+ if [[ $use_fstab != yes ]]; then
+ findmnt -e -v -n -o 'OPTIONS' --target "$1" 2> /dev/null && return 0
+ fi
+
+ [[ ! -f "$dracutsysrootdir"/etc/fstab ]] && return 1
+
+ findmnt --fstab -e -v -n -o 'OPTIONS' --target "$1"
+}
+
+# find_dev_fsopts <device>
+# Echo the filesystem options for a given device.
+# /proc/self/mountinfo is taken as the primary source of information
+# and /etc/fstab is used as a fallback.
+# if `use_fstab == yes`, then only `/etc/fstab` is used.
+#
+# Example:
+# $ find_dev_fsopts /dev/sda2
+# rw,relatime,discard,data=ordered
+find_dev_fsopts() {
+ local _find_dev
+ _find_dev="$1"
+ if ! [[ $_find_dev == /dev* ]]; then
+ [[ -b "/dev/block/$_find_dev" ]] && _find_dev="/dev/block/$_find_dev"
+ fi
+
+ if [[ $use_fstab != yes ]]; then
+ findmnt -e -v -n -o 'OPTIONS' --source "$_find_dev" 2> /dev/null && return 0
+ fi
+
+ [[ ! -f "$dracutsysrootdir"/etc/fstab ]] && return 1
+
+ findmnt --fstab -e -v -n -o 'OPTIONS' --source "$_find_dev"
+}
+
+# finds the major:minor of the block device backing the root filesystem.
+find_root_block_device() { find_block_device /; }
+
+# for_each_host_dev_fs <func>
+# Execute "<func> <dev> <filesystem>" for every "<dev> <fs>" pair found
+# in ${host_fs_types[@]}
+for_each_host_dev_fs() {
+ local _func="$1"
+ local _dev
+ local _ret=1
+
+ [[ "${#host_fs_types[@]}" ]] || return 2
+
+ for _dev in "${!host_fs_types[@]}"; do
+ $_func "$_dev" "${host_fs_types[$_dev]}" && _ret=0
+ done
+ return $_ret
+}
+
+host_fs_all() {
+ printf "%s\n" "${host_fs_types[@]}"
+}
+
+# Walk all the slave relationships for a given block device.
+# Stop when our helper function returns success
+# $1 = function to call on every found block device
+# $2 = block device in major:minor format
+check_block_and_slaves() {
+ local _x
+ [[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry.
+ if ! lvm_internal_dev "$2"; then "$1" "$2" && return; fi
+ check_vol_slaves "$@" && return 0
+ if [[ -f /sys/dev/block/$2/../dev ]] && [[ /sys/dev/block/$2/../subsystem -ef /sys/class/block ]]; then
+ check_block_and_slaves "$1" "$(< "/sys/dev/block/$2/../dev")" && return 0
+ fi
+ for _x in /sys/dev/block/"$2"/slaves/*; do
+ [[ -f $_x/dev ]] || continue
+ [[ $_x/subsystem -ef /sys/class/block ]] || continue
+ check_block_and_slaves "$1" "$(< "$_x/dev")" && return 0
+ done
+ return 1
+}
+
+check_block_and_slaves_all() {
+ local _x _ret=1
+ [[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry.
+ if ! lvm_internal_dev "$2" && "$1" "$2"; then
+ _ret=0
+ fi
+ check_vol_slaves_all "$@" && return 0
+ if [[ -f /sys/dev/block/$2/../dev ]] && [[ /sys/dev/block/$2/../subsystem -ef /sys/class/block ]]; then
+ check_block_and_slaves_all "$1" "$(< "/sys/dev/block/$2/../dev")" && _ret=0
+ fi
+ for _x in /sys/dev/block/"$2"/slaves/*; do
+ [[ -f $_x/dev ]] || continue
+ [[ $_x/subsystem -ef /sys/class/block ]] || continue
+ check_block_and_slaves_all "$1" "$(< "$_x/dev")" && _ret=0
+ done
+ return $_ret
+}
+# for_each_host_dev_and_slaves <func>
+# Execute "<func> <dev>" for every "<dev>" found
+# in ${host_devs[@]} and their slaves
+for_each_host_dev_and_slaves_all() {
+ local _func="$1"
+ local _dev
+ local _ret=1
+
+ [[ "${host_devs[*]}" ]] || return 2
+
+ for _dev in "${host_devs[@]}"; do
+ [[ -b $_dev ]] || continue
+ if check_block_and_slaves_all "$_func" "$(get_maj_min "$_dev")"; then
+ _ret=0
+ fi
+ done
+ return $_ret
+}
+
+for_each_host_dev_and_slaves() {
+ local _func="$1"
+ local _dev
+
+ [[ "${host_devs[*]}" ]] || return 2
+
+ for _dev in "${host_devs[@]}"; do
+ [[ -b $_dev ]] || continue
+ check_block_and_slaves "$_func" "$(get_maj_min "$_dev")" && return 0
+ done
+ return 1
+}
+
+# /sys/dev/block/major:minor is symbol link to real hardware device
+# go downstream $(realpath /sys/dev/block/major:minor) to detect driver
+get_blockdev_drv_through_sys() {
+ local _block_mods=""
+ local _path
+
+ _path=$(realpath "$1")
+ while true; do
+ if [[ -L "$_path"/driver/module ]]; then
+ _mod=$(realpath "$_path"/driver/module)
+ _mod=$(basename "$_mod")
+ _block_mods="$_block_mods $_mod"
+ fi
+ _path=$(dirname "$_path")
+ if [[ $_path == '/sys/devices' ]] || [[ $_path == '/' ]]; then
+ break
+ fi
+ done
+ echo "$_block_mods"
+}
+
+# ugly workaround for the lvm design
+# There is no volume group device,
+# so, there are no slave devices for volume groups.
+# Logical volumes only have the slave devices they really live on,
+# but you cannot create the logical volume without the volume group.
+# And the volume group might be bigger than the devices the LV needs.
+check_vol_slaves() {
+ local _vg _pv _dm _majmin
+ _majmin="$2"
+ _dm=/sys/dev/block/$_majmin/dm
+ [[ -f $_dm/uuid && $(< "$_dm"/uuid) =~ LVM-* ]] || return 1
+ _vg=$(dmsetup splitname --noheadings -o vg_name "$(< "$_dm/name")")
+ # strip space
+ _vg="${_vg//[[:space:]]/}"
+ if [[ $_vg ]]; then
+ for _pv in $(lvm vgs --noheadings -o pv_name "$_vg" 2> /dev/null); do
+ check_block_and_slaves "$1" "$(get_maj_min "$_pv")" && return 0
+ done
+ fi
+ return 1
+}
+
+check_vol_slaves_all() {
+ local _vg _pv _majmin
+ _majmin="$2"
+ _dm="/sys/dev/block/$_majmin/dm"
+ [[ -f $_dm/uuid && $(< "$_dm"/uuid) =~ LVM-* ]] || return 1
+ _vg=$(dmsetup splitname --noheadings -o vg_name "$(< "$_dm/name")")
+ # strip space
+ _vg="${_vg//[[:space:]]/}"
+ if [[ $_vg ]]; then
+ # when filter/global_filter is set, lvm may be failed
+ if ! lvm lvs --noheadings -o vg_name "$_vg" 2> /dev/null 1> /dev/null; then
+ return 1
+ fi
+
+ for _pv in $(lvm vgs --noheadings -o pv_name "$_vg" 2> /dev/null); do
+ check_block_and_slaves_all "$1" "$(get_maj_min "$_pv")"
+ done
+ return 0
+ fi
+ return 1
+}
+
+# fs_get_option <filesystem options> <search for option>
+# search for a specific option in a bunch of filesystem options
+# and return the value
+fs_get_option() {
+ local _fsopts=$1
+ local _option=$2
+ local OLDIFS="$IFS"
+ IFS=,
+ # shellcheck disable=SC2086
+ set -- $_fsopts
+ IFS="$OLDIFS"
+ while [ $# -gt 0 ]; do
+ case $1 in
+ $_option=*)
+ echo "${1#"${_option}"=}"
+ break
+ ;;
+ esac
+ shift
+ done
+}
+
+check_kernel_config() {
+ local _config_opt="$1"
+ local _config_file
+ [[ -f $dracutsysrootdir/boot/config-$kernel ]] \
+ && _config_file="/boot/config-$kernel"
+ [[ -f $dracutsysrootdir/lib/modules/$kernel/config ]] \
+ && _config_file="/lib/modules/$kernel/config"
+
+ # no kernel config file, so return true
+ [[ $_config_file ]] || return 0
+
+ grep -q -F "${_config_opt}=" "$dracutsysrootdir$_config_file" && return 0
+ return 1
+}
+
+# 0 if the kernel module is either built-in or available
+# 1 if the kernel module is not enabled
+check_kernel_module() {
+ modprobe -d "$dracutsysrootdir" -S "$kernel" --dry-run "$1" &> /dev/null || return 1
+}
+
+# get_cpu_vendor
+# Only two values are returned: AMD or Intel
+get_cpu_vendor() {
+ if grep -qE AMD /proc/cpuinfo; then
+ printf "AMD"
+ fi
+ if grep -qE Intel /proc/cpuinfo; then
+ printf "Intel"
+ fi
+}
+
+# get_host_ucode
+# Get the hosts' ucode file based on the /proc/cpuinfo
+get_ucode_file() {
+ local family
+ local model
+ local stepping
+ family=$(grep -E "cpu family" /proc/cpuinfo | head -1 | sed "s/.*:\ //")
+ model=$(grep -E "model" /proc/cpuinfo | grep -v name | head -1 | sed "s/.*:\ //")
+ stepping=$(grep -E "stepping" /proc/cpuinfo | head -1 | sed "s/.*:\ //")
+
+ if [[ "$(get_cpu_vendor)" == "AMD" ]]; then
+ if [[ $family -ge 21 ]]; then
+ printf "microcode_amd_fam%xh.bin" "$family"
+ else
+ printf "microcode_amd.bin"
+ fi
+ fi
+ if [[ "$(get_cpu_vendor)" == "Intel" ]]; then
+ # The /proc/cpuinfo are in decimal.
+ printf "%02x-%02x-%02x" "${family}" "${model}" "${stepping}"
+ fi
+}
+
+# Not every device in /dev/mapper should be examined.
+# If it is an LVM device, touch only devices which have /dev/VG/LV symlink.
+lvm_internal_dev() {
+ local dev_dm_dir=/sys/dev/block/$1/dm
+ [[ ! -f $dev_dm_dir/uuid || $(< "$dev_dm_dir"/uuid) != LVM-* ]] && return 1 # Not an LVM device
+ local DM_VG_NAME DM_LV_NAME DM_LV_LAYER
+ eval "$(dmsetup splitname --nameprefixes --noheadings --rows "$(< "$dev_dm_dir"/name)" 2> /dev/null)"
+ [[ ${DM_VG_NAME} ]] && [[ ${DM_LV_NAME} ]] || return 0 # Better skip this!
+ [[ ${DM_LV_LAYER} ]] || [[ ! -L /dev/${DM_VG_NAME}/${DM_LV_NAME} ]]
+}
+
+btrfs_devs() {
+ local _mp="$1"
+ btrfs device usage "$_mp" \
+ | while read -r _dev _; do
+ str_starts "$_dev" "/" || continue
+ _dev=${_dev%,}
+ printf -- "%s\n" "$_dev"
+ done
+}
+
+zfs_devs() {
+ local _mp="$1"
+ zpool list -H -v -P "${_mp%%/*}" | awk -F$'\t' '$2 ~ /^\// {print $2}' \
+ | while read -r _dev; do
+ realpath "${_dev}"
+ done
+}
+
+iface_for_remote_addr() {
+ # shellcheck disable=SC2046
+ set -- $(ip -o route get to "$1")
+ while [ $# -gt 0 ]; do
+ case $1 in
+ dev)
+ echo "$2"
+ return
+ ;;
+ esac
+ shift
+ done
+}
+
+local_addr_for_remote_addr() {
+ # shellcheck disable=SC2046
+ set -- $(ip -o route get to "$1")
+ while [ $# -gt 0 ]; do
+ case $1 in
+ src)
+ echo "$2"
+ return
+ ;;
+ esac
+ shift
+ done
+}
+
+peer_for_addr() {
+ local addr=$1
+ local qtd
+
+ # quote periods in IPv4 address
+ qtd=${addr//./\\.}
+ ip -o addr show \
+ | sed -n 's%^.* '"$qtd"' peer \([0-9a-f.:]\{1,\}\(/[0-9]*\)\?\).*$%\1%p'
+}
+
+netmask_for_addr() {
+ local addr=$1
+ local qtd
+
+ # quote periods in IPv4 address
+ qtd=${addr//./\\.}
+ ip -o addr show | sed -n 's,^.* '"$qtd"'/\([0-9]*\) .*$,\1,p'
+}
+
+gateway_for_iface() {
+ local ifname=$1 addr=$2
+
+ case $addr in
+ *.*) proto=4 ;;
+ *:*) proto=6 ;;
+ *) return ;;
+ esac
+ ip -o -$proto route show \
+ | sed -n "s/^default via \([0-9a-z.:]\{1,\}\) dev $ifname .*\$/\1/p"
+}
+
+# This works only for ifcfg-style network configuration!
+bootproto_for_iface() {
+ local ifname=$1
+ local dir
+
+ # follow ifcfg settings for boot protocol
+ for dir in network-scripts network; do
+ [ -f "/etc/sysconfig/$dir/ifcfg-$ifname" ] && {
+ sed -n "s/BOOTPROTO=[\"']\?\([[:alnum:]]\{1,\}\)[\"']\?.*\$/\1/p" \
+ "/etc/sysconfig/$dir/ifcfg-$ifname"
+ return
+ }
+ done
+}
+
+is_unbracketed_ipv6_address() {
+ strglob "$1" '*:*' && ! strglob "$1" '\[*:*\]'
+}
+
+# Create an ip= string to set up networking such that the given
+# remote address can be reached
+ip_params_for_remote_addr() {
+ local remote_addr=$1
+ local ifname local_addr peer netmask gateway ifmac
+
+ [[ $remote_addr ]] || return 1
+ ifname=$(iface_for_remote_addr "$remote_addr")
+ [[ $ifname ]] || {
+ berror "failed to determine interface to connect to $remote_addr"
+ return 1
+ }
+
+ # ifname clause to bind the interface name to a MAC address
+ if [ -d "/sys/class/net/$ifname/bonding" ]; then
+ dinfo "Found bonded interface '${ifname}'. Make sure to provide an appropriate 'bond=' cmdline."
+ elif [ -e "/sys/class/net/$ifname/address" ]; then
+ ifmac=$(cat "/sys/class/net/$ifname/address")
+ [[ $ifmac ]] && printf 'ifname=%s:%s ' "${ifname}" "${ifmac}"
+ fi
+
+ bootproto=$(bootproto_for_iface "$ifname")
+ case $bootproto in
+ dhcp | dhcp6 | auto6) ;;
+ dhcp4)
+ bootproto=dhcp
+ ;;
+ static* | "")
+ bootproto=
+ ;;
+ *)
+ derror "bootproto \"$bootproto\" is unsupported by dracut, trying static configuration"
+ bootproto=
+ ;;
+ esac
+ if [[ $bootproto ]]; then
+ printf 'ip=%s:%s ' "${ifname}" "${bootproto}"
+ else
+ local_addr=$(local_addr_for_remote_addr "$remote_addr")
+ [[ $local_addr ]] || {
+ berror "failed to determine local address to connect to $remote_addr"
+ return 1
+ }
+ peer=$(peer_for_addr "$local_addr")
+ # Set peer or netmask, but not both
+ [[ $peer ]] || netmask=$(netmask_for_addr "$local_addr")
+ gateway=$(gateway_for_iface "$ifname" "$local_addr")
+ # Quote IPv6 addresses with brackets
+ is_unbracketed_ipv6_address "$local_addr" && local_addr="[$local_addr]"
+ is_unbracketed_ipv6_address "$peer" && peer="[$peer]"
+ is_unbracketed_ipv6_address "$gateway" && gateway="[$gateway]"
+ printf 'ip=%s:%s:%s:%s::%s:none ' \
+ "${local_addr}" "${peer}" "${gateway}" "${netmask}" "${ifname}"
+ fi
+
+}
+
+# block_is_nbd <maj:min>
+# Check whether $1 is an nbd device
+block_is_nbd() {
+ [[ -b /dev/block/$1 && $1 == 43:* ]]
+}
+
+# block_is_iscsi <maj:min>
+# Check whether $1 is an iSCSI device
+block_is_iscsi() {
+ local _dir
+ local _dev=$1
+ [[ -L "/sys/dev/block/$_dev" ]] || return
+ _dir="$(readlink -f "/sys/dev/block/$_dev")" || return
+ until [[ -d "$_dir/sys" || -d "$_dir/iscsi_session" ]]; do
+ _dir="$_dir/.."
+ done
+ [[ -d "$_dir/iscsi_session" ]]
+}
+
+# block_is_fcoe <maj:min>
+# Check whether $1 is an FCoE device
+# Will not work for HBAs that hide the ethernet aspect
+# completely and present a pure FC device
+block_is_fcoe() {
+ local _dir
+ local _dev=$1
+ [[ -L "/sys/dev/block/$_dev" ]] || return
+ _dir="$(readlink -f "/sys/dev/block/$_dev")"
+ until [[ -d "$_dir/sys" ]]; do
+ _dir="$_dir/.."
+ if [[ -d "$_dir/subsystem" ]]; then
+ subsystem=$(basename "$(readlink "$_dir"/subsystem)")
+ [[ $subsystem == "fcoe" ]] && return 0
+ fi
+ done
+ return 1
+}
+
+# block_is_netdevice <maj:min>
+# Check whether $1 is a net device
+block_is_netdevice() {
+ block_is_nbd "$1" || block_is_iscsi "$1" || block_is_fcoe "$1"
+}
+
+# convert the driver name given by udevadm to the corresponding kernel module name
+get_module_name() {
+ local dev_driver
+ while read -r dev_driver; do
+ case "$dev_driver" in
+ mmcblk)
+ echo "mmc_block"
+ ;;
+ *)
+ echo "$dev_driver"
+ ;;
+ esac
+ done
+}
+
+# get the corresponding kernel modules of a /sys/class/*/* or/dev/* device
+get_dev_module() {
+ local dev_attr_walk
+ local dev_drivers
+ local dev_paths
+ dev_attr_walk=$(udevadm info -a "$1")
+ dev_drivers=$(echo "$dev_attr_walk" \
+ | sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p' \
+ | get_module_name)
+
+ # also return modalias info from sysfs paths parsed by udevadm
+ dev_paths=$(echo "$dev_attr_walk" | sed -n 's/.*\(\/devices\/.*\)'\'':/\1/p')
+ local dev_path
+ for dev_path in $dev_paths; do
+ local modalias_file="/sys$dev_path/modalias"
+ if [ -e "$modalias_file" ]; then
+ dev_drivers="$(printf "%s\n%s" "$dev_drivers" "$(cat "$modalias_file")")"
+ fi
+ done
+
+ # if no kernel modules found and device is in a virtual subsystem, follow symlinks
+ if [[ -z $dev_drivers && $(udevadm info -q path "$1") == "/devices/virtual"* ]]; then
+ local dev_vkernel
+ local dev_vsubsystem
+ local dev_vpath
+ dev_vkernel=$(echo "$dev_attr_walk" | sed -n 's/\s*KERNELS=="\(\S\+\)"/\1/p' | tail -1)
+ dev_vsubsystem=$(echo "$dev_attr_walk" | sed -n 's/\s*SUBSYSTEMS=="\(\S\+\)"/\1/p' | tail -1)
+ dev_vpath="/sys/devices/virtual/$dev_vsubsystem/$dev_vkernel"
+ if [[ -n $dev_vkernel && -n $dev_vsubsystem && -d $dev_vpath ]]; then
+ local dev_links
+ local dev_link
+ dev_links=$(find "$dev_vpath" -maxdepth 1 -type l ! -name "subsystem" -exec readlink {} \;)
+ for dev_link in $dev_links; do
+ [[ -n $dev_drivers && ${dev_drivers: -1} != $'\n' ]] && dev_drivers+=$'\n'
+ dev_drivers+=$(udevadm info -a "$dev_vpath/$dev_link" \
+ | sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p' \
+ | get_module_name \
+ | grep -v -e pcieport)
+ done
+ fi
+ fi
+ echo "$dev_drivers"
+}
+
+# Check if file is in PE format
+pe_file_format() {
+ if [[ $# -eq 1 ]]; then
+ local magic
+ magic=$(objdump -p "$1" \
+ | gawk '{if ($1 == "Magic"){print strtonum("0x"$2)}}')
+ magic=$(printf "0x%x" "$magic")
+ # 0x10b (PE32), 0x20b (PE32+)
+ [[ $magic == 0x20b || $magic == 0x10b ]] && return 0
+ fi
+ return 1
+}
+
+# Get specific data from the PE header
+pe_get_header_data() {
+ local data_header
+ [[ $# -ne "2" ]] && return 1
+ [[ $(pe_file_format "$1") -eq 1 ]] && return 1
+ data_header=$(objdump -p "$1" \
+ | awk -v data="$2" '{if ($1 == data){print $2}}')
+ echo "$data_header"
+}
+
+# Get the SectionAlignment data from the PE header
+pe_get_section_align() {
+ local align_hex
+ [[ $# -ne "1" ]] && return 1
+ align_hex=$(pe_get_header_data "$1" "SectionAlignment")
+ [[ $? -eq 1 ]] && return 1
+ echo "$((16#$align_hex))"
+}
+
+# Get the ImageBase data from the PE header
+pe_get_image_base() {
+ local base_image
+ [[ $# -ne "1" ]] && return 1
+ base_image=$(pe_get_header_data "$1" "ImageBase")
+ [[ $? -eq 1 ]] && return 1
+ echo "$((16#$base_image))"
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 00:31:36 +0000