linux/scripts/config at master · multikernel/linux · GitHub

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#!/usr/bin/env bash

# SPDX-License-Identifier: GPL-2.0

# Manipulate options in a .config file from the command line

myname=${0##*/}

# If no prefix forced, use the default CONFIG_

CONFIG_="${CONFIG_-CONFIG_}"

# We use an uncommon delimiter for sed substitutions

SED_DELIM=$(echo -en "\001")

usage() {

cat >&2 <<EOL

Manipulate options in a .config file from the command line.

Usage:

$myname options command ...

commands:

--enable|-e option Enable option

--disable|-d option Disable option

--module|-m option Turn option into a module

--set-str option string

Set option to "string"

--set-val option value

Set option to value

--undefine|-u option Undefine option

--state|-s option Print state of option (n,y,m,undef)

--enable-after|-E beforeopt option

Enable option directly after other option

--disable-after|-D beforeopt option

Disable option directly after other option

--module-after|-M beforeopt option

Turn option into module directly after other option

--refresh Refresh the config using old settings

commands can be repeated multiple times

options:

--file config-file .config file to change (default .config)

--keep-case|-k Keep next symbols' case (dont' upper-case it)

$myname doesn't check the validity of the .config file. This is done at next

make time.

By default, $myname will upper-case the given symbol. Use --keep-case to keep

the case of all following symbols unchanged.

$myname uses 'CONFIG_' as the default symbol prefix. Set the environment

variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" $myname ...

EOL

exit 1

}

checkarg() {

ARG="$1"

if [ "$ARG" = "" ] ; then

usage

case "$ARG" in

${CONFIG_}*)

ARG="${ARG/${CONFIG_}/}"

;;

esac

if [ "$MUNGE_CASE" = "yes" ] ; then

ARG="`echo $ARG | tr a-z A-Z`"

}

txt_append() {

local anchor="$1"

local insert="$2"

local infile="$3"

local tmpfile="$infile.swp"

# sed append cmd: 'a\' + newline + text + newline

cmd="$(printf "a\\%b$insert" "\n")"

sed -e "/$anchor/$cmd" "$infile" >"$tmpfile"

# replace original file with the edited one

mv "$tmpfile" "$infile"

}

txt_subst() {

local before="$1"

local after="$2"

local infile="$3"

local tmpfile="$infile.swp"

sed -e "s$SED_DELIM$before$SED_DELIM$after$SED_DELIM" "$infile" >"$tmpfile"

# replace original file with the edited one

mv "$tmpfile" "$infile"

}

txt_delete() {

local text="$1"

local infile="$2"

local tmpfile="$infile.swp"

sed -e "/$text/d" "$infile" >"$tmpfile"

# replace original file with the edited one

mv "$tmpfile" "$infile"

}

set_var() {

local name=$1 new=$2 before=$3

name_re="^($name=|# $name is not set)"

before_re="^($before=|# $before is not set)"

if test -n "$before" && grep -Eq "$before_re" "$FN"; then

txt_append "^$before=" "$new" "$FN"

txt_append "^# $before is not set" "$new" "$FN"

elif grep -Eq "$name_re" "$FN"; then

txt_subst "^$name=.*" "$new" "$FN"

txt_subst "^# $name is not set" "$new" "$FN"

else

echo "$new" >>"$FN"

}

undef_var() {

local name=$1

txt_delete "^$name=" "$FN"

txt_delete "^# $name is not set" "$FN"

}

FN=.config

CMDS=()

while [[ $# -gt 0 ]]; do

if [ "$1" = "--file" ]; then

if [ "$2" = "" ]; then

usage

FN="$2"

shift 2

else

CMDS+=("$1")

shift

done

set -- "${CMDS[@]}"

if [ "$1" = "" ] ; then

usage

MUNGE_CASE=yes

while [ "$1" != "" ] ; do

CMD="$1"

shift

case "$CMD" in

--keep-case|-k)

MUNGE_CASE=no

continue

;;

--refresh)

;;

--*-after|-E|-D|-M)

checkarg "$1"

A=$ARG

checkarg "$2"

B=$ARG

shift 2

;;

-*)

checkarg "$1"

shift

;;

esac

case "$CMD" in

--enable|-e)

set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=y"

;;

--disable|-d)

set_var "${CONFIG_}$ARG" "# ${CONFIG_}$ARG is not set"

;;

--module|-m)

set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=m"

;;

--set-str)

# sed swallows one level of escaping, so we need double-escaping

set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=\"${1//\"/\\\\\"}\""

shift

;;

--set-val)

set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=$1"

shift

;;

--undefine|-u)

undef_var "${CONFIG_}$ARG"

;;

--state|-s)

if grep -q "# ${CONFIG_}$ARG is not set" $FN ; then

echo n

else

V="$(grep "^${CONFIG_}$ARG=" $FN)"

if [ $? != 0 ] ; then

echo undef

else

V="${V/#${CONFIG_}$ARG=/}"

V="${V/#\"/}"

V="${V/%\"/}"

V="${V//\\\"/\"}"

echo "${V}"

;;

--enable-after|-E)

set_var "${CONFIG_}$B" "${CONFIG_}$B=y" "${CONFIG_}$A"

;;

--disable-after|-D)

set_var "${CONFIG_}$B" "# ${CONFIG_}$B is not set" "${CONFIG_}$A"

;;

--module-after|-M)

set_var "${CONFIG_}$B" "${CONFIG_}$B=m" "${CONFIG_}$A"

;;

--refresh)

yes "" | make oldconfig KCONFIG_CONFIG=$FN

;;

echo "bad command: $CMD" >&2

usage

;;

esac

done

linux/scripts/config at master · multikernel/linux · GitHub

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