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1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3# Manipulate options in a .config file from the command line
4
5myname=${0##*/}
6
7# If no prefix forced, use the default CONFIG_
8CONFIG_="${CONFIG_-CONFIG_}"
9
10usage() {
11 cat >&2 <<EOL
12Manipulate options in a .config file from the command line.
13Usage:
14$myname options command ...
15commands:
16 --enable|-e option Enable option
17 --disable|-d option Disable option
18 --module|-m option Turn option into a module
19 --set-str option string
20 Set option to "string"
21 --set-val option value
22 Set option to value
23 --undefine|-u option Undefine option
24 --state|-s option Print state of option (n,y,m,undef)
25
26 --enable-after|-E beforeopt option
27 Enable option directly after other option
28 --disable-after|-D beforeopt option
29 Disable option directly after other option
30 --module-after|-M beforeopt option
31 Turn option into module directly after other option
32
33 commands can be repeated multiple times
34
35options:
36 --file config-file .config file to change (default .config)
37 --keep-case|-k Keep next symbols' case (dont' upper-case it)
38
39$myname doesn't check the validity of the .config file. This is done at next
40make time.
41
42By default, $myname will upper-case the given symbol. Use --keep-case to keep
43the case of all following symbols unchanged.
44
45$myname uses 'CONFIG_' as the default symbol prefix. Set the environment
46variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" $myname ...
47EOL
48 exit 1
49}
50
51checkarg() {
52 ARG="$1"
53 if [ "$ARG" = "" ] ; then
54 usage
55 fi
56 case "$ARG" in
57 ${CONFIG_}*)
58 ARG="${ARG/${CONFIG_}/}"
59 ;;
60 esac
61 if [ "$MUNGE_CASE" = "yes" ] ; then
62 ARG="`echo $ARG | tr a-z A-Z`"
63 fi
64}
65
66txt_append() {
67 local anchor="$1"
68 local insert="$2"
69 local infile="$3"
70 local tmpfile="$infile.swp"
71
72 # sed append cmd: 'a\' + newline + text + newline
73 cmd="$(printf "a\\%b$insert" "\n")"
74
75 sed -e "/$anchor/$cmd" "$infile" >"$tmpfile"
76 # replace original file with the edited one
77 mv "$tmpfile" "$infile"
78}
79
80txt_subst() {
81 local before="$1"
82 local after="$2"
83 local infile="$3"
84 local tmpfile="$infile.swp"
85
86 sed -e "s:$before:$after:" "$infile" >"$tmpfile"
87 # replace original file with the edited one
88 mv "$tmpfile" "$infile"
89}
90
91txt_delete() {
92 local text="$1"
93 local infile="$2"
94 local tmpfile="$infile.swp"
95
96 sed -e "/$text/d" "$infile" >"$tmpfile"
97 # replace original file with the edited one
98 mv "$tmpfile" "$infile"
99}
100
101set_var() {
102 local name=$1 new=$2 before=$3
103
104 name_re="^($name=|# $name is not set)"
105 before_re="^($before=|# $before is not set)"
106 if test -n "$before" && grep -Eq "$before_re" "$FN"; then
107 txt_append "^$before=" "$new" "$FN"
108 txt_append "^# $before is not set" "$new" "$FN"
109 elif grep -Eq "$name_re" "$FN"; then
110 txt_subst "^$name=.*" "$new" "$FN"
111 txt_subst "^# $name is not set" "$new" "$FN"
112 else
113 echo "$new" >>"$FN"
114 fi
115}
116
117undef_var() {
118 local name=$1
119
120 txt_delete "^$name=" "$FN"
121 txt_delete "^# $name is not set" "$FN"
122}
123
124if [ "$1" = "--file" ]; then
125 FN="$2"
126 if [ "$FN" = "" ] ; then
127 usage
128 fi
129 shift 2
130else
131 FN=.config
132fi
133
134if [ "$1" = "" ] ; then
135 usage
136fi
137
138MUNGE_CASE=yes
139while [ "$1" != "" ] ; do
140 CMD="$1"
141 shift
142 case "$CMD" in
143 --keep-case|-k)
144 MUNGE_CASE=no
145 continue
146 ;;
147 --refresh)
148 ;;
149 --*-after|-E|-D|-M)
150 checkarg "$1"
151 A=$ARG
152 checkarg "$2"
153 B=$ARG
154 shift 2
155 ;;
156 -*)
157 checkarg "$1"
158 shift
159 ;;
160 esac
161 case "$CMD" in
162 --enable|-e)
163 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=y"
164 ;;
165
166 --disable|-d)
167 set_var "${CONFIG_}$ARG" "# ${CONFIG_}$ARG is not set"
168 ;;
169
170 --module|-m)
171 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=m"
172 ;;
173
174 --set-str)
175 # sed swallows one level of escaping, so we need double-escaping
176 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=\"${1//\"/\\\\\"}\""
177 shift
178 ;;
179
180 --set-val)
181 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=$1"
182 shift
183 ;;
184 --undefine|-u)
185 undef_var "${CONFIG_}$ARG"
186 ;;
187
188 --state|-s)
189 if grep -q "# ${CONFIG_}$ARG is not set" $FN ; then
190 echo n
191 else
192 V="$(grep "^${CONFIG_}$ARG=" $FN)"
193 if [ $? != 0 ] ; then
194 echo undef
195 else
196 V="${V/#${CONFIG_}$ARG=/}"
197 V="${V/#\"/}"
198 V="${V/%\"/}"
199 V="${V//\\\"/\"}"
200 echo "${V}"
201 fi
202 fi
203 ;;
204
205 --enable-after|-E)
206 set_var "${CONFIG_}$B" "${CONFIG_}$B=y" "${CONFIG_}$A"
207 ;;
208
209 --disable-after|-D)
210 set_var "${CONFIG_}$B" "# ${CONFIG_}$B is not set" "${CONFIG_}$A"
211 ;;
212
213 --module-after|-M)
214 set_var "${CONFIG_}$B" "${CONFIG_}$B=m" "${CONFIG_}$A"
215 ;;
216
217 # undocumented because it ignores --file (fixme)
218 --refresh)
219 yes "" | make oldconfig
220 ;;
221
222 *)
223 usage
224 ;;
225 esac
226done
1#!/bin/bash
2# Manipulate options in a .config file from the command line
3
4usage() {
5 cat >&2 <<EOL
6Manipulate options in a .config file from the command line.
7Usage:
8config options command ...
9commands:
10 --enable|-e option Enable option
11 --disable|-d option Disable option
12 --module|-m option Turn option into a module
13 --set-str option string
14 Set option to "string"
15 --set-val option value
16 Set option to value
17 --state|-s option Print state of option (n,y,m,undef)
18
19 --enable-after|-E beforeopt option
20 Enable option directly after other option
21 --disable-after|-D beforeopt option
22 Disable option directly after other option
23 --module-after|-M beforeopt option
24 Turn option into module directly after other option
25
26 commands can be repeated multiple times
27
28options:
29 --file .config file to change (default .config)
30
31config doesn't check the validity of the .config file. This is done at next
32 make time.
33EOL
34 exit 1
35}
36
37checkarg() {
38 ARG="$1"
39 if [ "$ARG" = "" ] ; then
40 usage
41 fi
42 case "$ARG" in
43 CONFIG_*)
44 ARG="${ARG/CONFIG_/}"
45 ;;
46 esac
47 ARG="`echo $ARG | tr a-z A-Z`"
48}
49
50set_var() {
51 local name=$1 new=$2 before=$3
52
53 name_re="^($name=|# $name is not set)"
54 before_re="^($before=|# $before is not set)"
55 if test -n "$before" && grep -Eq "$before_re" "$FN"; then
56 sed -ri "/$before_re/a $new" "$FN"
57 elif grep -Eq "$name_re" "$FN"; then
58 sed -ri "s:$name_re.*:$new:" "$FN"
59 else
60 echo "$new" >>"$FN"
61 fi
62}
63
64if [ "$1" = "--file" ]; then
65 FN="$2"
66 if [ "$FN" = "" ] ; then
67 usage
68 fi
69 shift 2
70else
71 FN=.config
72fi
73
74if [ "$1" = "" ] ; then
75 usage
76fi
77
78while [ "$1" != "" ] ; do
79 CMD="$1"
80 shift
81 case "$CMD" in
82 --refresh)
83 ;;
84 --*-after)
85 checkarg "$1"
86 A=$ARG
87 checkarg "$2"
88 B=$ARG
89 shift 2
90 ;;
91 -*)
92 checkarg "$1"
93 shift
94 ;;
95 esac
96 case "$CMD" in
97 --enable|-e)
98 set_var "CONFIG_$ARG" "CONFIG_$ARG=y"
99 ;;
100
101 --disable|-d)
102 set_var "CONFIG_$ARG" "# CONFIG_$ARG is not set"
103 ;;
104
105 --module|-m)
106 set_var "CONFIG_$ARG" "CONFIG_$ARG=m"
107 ;;
108
109 --set-str)
110 set_var "CONFIG_$ARG" "CONFIG_$ARG=\"$1\""
111 shift
112 ;;
113
114 --set-val)
115 set_var "CONFIG_$ARG" "CONFIG_$ARG=$1"
116 shift
117 ;;
118
119 --state|-s)
120 if grep -q "# CONFIG_$ARG is not set" $FN ; then
121 echo n
122 else
123 V="$(grep "^CONFIG_$ARG=" $FN)"
124 if [ $? != 0 ] ; then
125 echo undef
126 else
127 V="${V/CONFIG_$ARG=/}"
128 V="${V/\"/}"
129 echo "$V"
130 fi
131 fi
132 ;;
133
134 --enable-after|-E)
135 set_var "CONFIG_$B" "CONFIG_$B=y" "CONFIG_$A"
136 ;;
137
138 --disable-after|-D)
139 set_var "CONFIG_$B" "# CONFIG_$B is not set" "CONFIG_$A"
140 ;;
141
142 --module-after|-M)
143 set_var "CONFIG_$B" "CONFIG_$B=m" "CONFIG_$A"
144 ;;
145
146 # undocumented because it ignores --file (fixme)
147 --refresh)
148 yes "" | make oldconfig
149 ;;
150
151 *)
152 usage
153 ;;
154 esac
155done
156