scripts/coccinelle: find constant additions that could be bit ors
[linux-3.10.git] / scripts / config
1 #!/bin/bash
2 # Manipulate options in a .config file from the command line
3
4 # If no prefix forced, use the default CONFIG_
5 CONFIG_="${CONFIG_-CONFIG_}"
6
7 usage() {
8         cat >&2 <<EOL
9 Manipulate options in a .config file from the command line.
10 Usage:
11 config options command ...
12 commands:
13         --enable|-e option   Enable option
14         --disable|-d option  Disable option
15         --module|-m option   Turn option into a module
16         --set-str option string
17                              Set option to "string"
18         --set-val option value
19                              Set option to value
20         --undefine|-u option Undefine option
21         --state|-s option    Print state of option (n,y,m,undef)
22
23         --enable-after|-E beforeopt option
24                              Enable option directly after other option
25         --disable-after|-D beforeopt option
26                              Disable option directly after other option
27         --module-after|-M beforeopt option
28                              Turn option into module directly after other option
29
30         commands can be repeated multiple times
31
32 options:
33         --file config-file   .config file to change (default .config)
34         --keep-case|-k       Keep next symbols' case (dont' upper-case it)
35
36 config doesn't check the validity of the .config file. This is done at next
37 make time.
38
39 By default, config will upper-case the given symbol. Use --keep-case to keep
40 the case of all following symbols unchanged.
41
42 config uses 'CONFIG_' as the default symbol prefix. Set the environment
43 variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" config ...
44 EOL
45         exit 1
46 }
47
48 checkarg() {
49         ARG="$1"
50         if [ "$ARG" = "" ] ; then
51                 usage
52         fi
53         case "$ARG" in
54         ${CONFIG_}*)
55                 ARG="${ARG/${CONFIG_}/}"
56                 ;;
57         esac
58         if [ "$MUNGE_CASE" = "yes" ] ; then
59                 ARG="`echo $ARG | tr a-z A-Z`"
60         fi
61 }
62
63 set_var() {
64         local name=$1 new=$2 before=$3
65
66         name_re="^($name=|# $name is not set)"
67         before_re="^($before=|# $before is not set)"
68         if test -n "$before" && grep -Eq "$before_re" "$FN"; then
69                 sed -ri "/$before_re/a $new" "$FN"
70         elif grep -Eq "$name_re" "$FN"; then
71                 sed -ri "s:$name_re.*:$new:" "$FN"
72         else
73                 echo "$new" >>"$FN"
74         fi
75 }
76
77 undef_var() {
78         local name=$1
79
80         sed -ri "/^($name=|# $name is not set)/d" "$FN"
81 }
82
83 if [ "$1" = "--file" ]; then
84         FN="$2"
85         if [ "$FN" = "" ] ; then
86                 usage
87         fi
88         shift 2
89 else
90         FN=.config
91 fi
92
93 if [ "$1" = "" ] ; then
94         usage
95 fi
96
97 MUNGE_CASE=yes
98 while [ "$1" != "" ] ; do
99         CMD="$1"
100         shift
101         case "$CMD" in
102         --keep-case|-k)
103                 MUNGE_CASE=no
104                 continue
105                 ;;
106         --refresh)
107                 ;;
108         --*-after)
109                 checkarg "$1"
110                 A=$ARG
111                 checkarg "$2"
112                 B=$ARG
113                 shift 2
114                 ;;
115         -*)
116                 checkarg "$1"
117                 shift
118                 ;;
119         esac
120         case "$CMD" in
121         --enable|-e)
122                 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=y"
123                 ;;
124
125         --disable|-d)
126                 set_var "${CONFIG_}$ARG" "# ${CONFIG_}$ARG is not set"
127                 ;;
128
129         --module|-m)
130                 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=m"
131                 ;;
132
133         --set-str)
134                 # sed swallows one level of escaping, so we need double-escaping
135                 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=\"${1//\"/\\\\\"}\""
136                 shift
137                 ;;
138
139         --set-val)
140                 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=$1"
141                 shift
142                 ;;
143         --undefine|-u)
144                 undef_var "${CONFIG_}$ARG"
145                 ;;
146
147         --state|-s)
148                 if grep -q "# ${CONFIG_}$ARG is not set" $FN ; then
149                         echo n
150                 else
151                         V="$(grep "^${CONFIG_}$ARG=" $FN)"
152                         if [ $? != 0 ] ; then
153                                 echo undef
154                         else
155                                 V="${V/#${CONFIG_}$ARG=/}"
156                                 V="${V/#\"/}"
157                                 V="${V/%\"/}"
158                                 V="${V//\\\"/\"}"
159                                 echo "${V}"
160                         fi
161                 fi
162                 ;;
163
164         --enable-after|-E)
165                 set_var "${CONFIG_}$B" "${CONFIG_}$B=y" "${CONFIG_}$A"
166                 ;;
167
168         --disable-after|-D)
169                 set_var "${CONFIG_}$B" "# ${CONFIG_}$B is not set" "${CONFIG_}$A"
170                 ;;
171
172         --module-after|-M)
173                 set_var "${CONFIG_}$B" "${CONFIG_}$B=m" "${CONFIG_}$A"
174                 ;;
175
176         # undocumented because it ignores --file (fixme)
177         --refresh)
178                 yes "" | make oldconfig
179                 ;;
180
181         *)
182                 usage
183                 ;;
184         esac
185 done
186