diff options
Diffstat (limited to 'kernel/scripts/config')
| -rwxr-xr-x | kernel/scripts/config | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/kernel/scripts/config b/kernel/scripts/config new file mode 100755 index 000000000..026aeb4f3 --- /dev/null +++ b/kernel/scripts/config @@ -0,0 +1,225 @@ +#!/bin/bash +# Manipulate options in a .config file from the command line + +myname=${0##*/} + +# If no prefix forced, use the default CONFIG_ +CONFIG_="${CONFIG_-CONFIG_}" + +usage() { + cat >&2 <<EOL +Manipulate options in a .config file from the command line. +Usage: +$myname options command ... +commands: + --enable|-e option Enable option + --disable|-d option Disable option + --module|-m option Turn option into a module + --set-str option string + Set option to "string" + --set-val option value + Set option to value + --undefine|-u option Undefine option + --state|-s option Print state of option (n,y,m,undef) + + --enable-after|-E beforeopt option + Enable option directly after other option + --disable-after|-D beforeopt option + Disable option directly after other option + --module-after|-M beforeopt option + Turn option into module directly after other option + + commands can be repeated multiple times + +options: + --file config-file .config file to change (default .config) + --keep-case|-k Keep next symbols' case (dont' upper-case it) + +$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 + fi + case "$ARG" in + ${CONFIG_}*) + ARG="${ARG/${CONFIG_}/}" + ;; + esac + if [ "$MUNGE_CASE" = "yes" ] ; then + ARG="`echo $ARG | tr a-z A-Z`" + fi +} + +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:$before:$after:" "$infile" >"$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" + fi +} + +undef_var() { + local name=$1 + + txt_delete "^$name=" "$FN" + txt_delete "^# $name is not set" "$FN" +} + +if [ "$1" = "--file" ]; then + FN="$2" + if [ "$FN" = "" ] ; then + usage + fi + shift 2 +else + FN=.config +fi + +if [ "$1" = "" ] ; then + usage +fi + +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}" + fi + fi + ;; + + --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" + ;; + + # undocumented because it ignores --file (fixme) + --refresh) + yes "" | make oldconfig + ;; + + *) + usage + ;; + esac +done |