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