1 /***************************************************************************
2 * mkconfigs.c
3 * (C) 2002 Randy Dunlap <rddunlap@osdl.org>
4
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
9 #
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
14 #
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18
19 # Rules for scripts/mkconfigs.c input.config output.c
20 # to generate configs.c from linux/.config:
21 # - drop lines that begin with '#'
22 # - drop blank lines
23 # - lines that use double-quotes must \\-escape-quote them
24
25 ################## skeleton configs.c file: ####################
26
27 #include <linux/init.h>
28 #include <linux/module.h>
29
30 static char *configs[] __initdata =
31
32 <insert lines selected lines of .config, quoted, with added '\n'>,
33
34 ;
35
36 ################### end configs.c file ######################
37
38 * Changelog for ver. 0.2, 2002-02-15, rddunlap@osdl.org:
39 - strip leading "CONFIG_" from config option strings;
40 - use "static" and "__attribute__((unused))";
41 - don't use EXPORT_SYMBOL();
42 - separate each config line with \newline instead of space;
43
44 * Changelog for ver. 0.3, 2002-02-18, rddunlap@osdl.org:
45 - keep all "not set" comment lines from .config so that 'make *config'
46 will be happy, but don't keep other comments;
47 - keep leading "CONFIG_" on each line;
48
49 ****************************************************************/
50
51 #include <stdio.h>
52 #include <stdlib.h>
53 #include <string.h>
54 #include <errno.h>
55
56 #define VERSION "0.2"
57 #define LINE_SIZE 1000
58
59 int include_all_lines = 1; // whether to include "=n" lines in the output
60
usage(const char * progname)61 void usage (const char *progname)
62 {
63 fprintf (stderr, "%s ver. %s\n", progname, VERSION);
64 fprintf (stderr, "usage: %s input.config.name path/configs.c\n",
65 progname);
66 exit (1);
67 }
68
make_intro(FILE * sourcefile)69 void make_intro (FILE *sourcefile)
70 {
71 fprintf (sourcefile, "#include <linux/init.h>\n");
72 ///// fprintf (sourcefile, "#include <linux/module.h>\n");
73 fprintf (sourcefile, "\n");
74 ///// fprintf (sourcefile, "char *configs[] __initdata = {\n");
75 fprintf (sourcefile, "static char __attribute__ ((unused)) *configs[] __initdata = {\n");
76 fprintf (sourcefile, " \"CONFIG_BEGIN=n\\n\" ,\n");
77 }
78
make_ending(FILE * sourcefile)79 void make_ending (FILE *sourcefile)
80 {
81 fprintf (sourcefile, " \"CONFIG_END=n\\n\"\n");
82 fprintf (sourcefile, "};\n");
83 ///// fprintf (sourcefile, "EXPORT_SYMBOL (configs);\n");
84 }
85
make_lines(FILE * configfile,FILE * sourcefile)86 void make_lines (FILE *configfile, FILE *sourcefile)
87 {
88 char cfgline[LINE_SIZE];
89 char *ch;
90
91 while (fgets (cfgline, LINE_SIZE, configfile)) {
92 /* kill the trailing newline in cfgline */
93 cfgline[strlen (cfgline) - 1] = '\0';
94
95 /* don't keep #-only line or an empty/blank line */
96 if ((cfgline[0] == '#' && cfgline[1] == '\0') ||
97 cfgline[0] == '\0')
98 continue;
99
100 if (!include_all_lines &&
101 cfgline[0] == '#') // strip out all comment lines
102 continue;
103
104 /* really only want to keep lines that begin with
105 * "CONFIG_" or "# CONFIG_" */
106 if (strncmp (cfgline, "CONFIG_", 7) &&
107 strncmp (cfgline, "# CONFIG_", 9))
108 continue;
109
110 /*
111 * use strchr() to check for "-quote in cfgline;
112 * if not found, output the line, quoted;
113 * if found, output a char at a time, with \\-quote
114 * preceding double-quote chars
115 */
116 if (!strchr (cfgline, '"')) {
117 fprintf (sourcefile, " \"%s\\n\" ,\n", cfgline);
118 continue;
119 }
120
121 /* go to char-at-a-time mode for this config and
122 * precede any double-quote with a backslash */
123 fprintf (sourcefile, " \""); /* lead-in */
124 for (ch = cfgline; *ch; ch++) {
125 if (*ch == '"')
126 fputc ('\\', sourcefile);
127 fputc (*ch, sourcefile);
128 }
129 fprintf (sourcefile, "\\n\" ,\n");
130 }
131 }
132
make_configs(FILE * configfile,FILE * sourcefile)133 void make_configs (FILE *configfile, FILE *sourcefile)
134 {
135 make_intro (sourcefile);
136 make_lines (configfile, sourcefile);
137 make_ending (sourcefile);
138 }
139
main(int argc,char * argv[])140 int main (int argc, char *argv[])
141 {
142 char *progname = argv[0];
143 char *configname, *sourcename;
144 FILE *configfile, *sourcefile;
145
146 if (argc != 3)
147 usage (progname);
148
149 configname = argv[1];
150 sourcename = argv[2];
151
152 configfile = fopen (configname, "r");
153 if (!configfile) {
154 fprintf (stderr, "%s: cannot open '%s'\n",
155 progname, configname);
156 exit (2);
157 }
158 sourcefile = fopen (sourcename, "w");
159 if (!sourcefile) {
160 fprintf (stderr, "%s: cannot open '%s'\n",
161 progname, sourcename);
162 exit (2);
163 }
164
165 make_configs (configfile, sourcefile);
166
167 if (fclose (sourcefile)) {
168 fprintf (stderr, "%s: error %d closing '%s'\n",
169 progname, errno, sourcename);
170 exit (3);
171 }
172 if (fclose (configfile)) {
173 fprintf (stderr, "%s: error %d closing '%s'\n",
174 progname, errno, configname);
175 exit (3);
176 }
177
178 exit (0);
179 }
180
181 /* end mkconfigs.c */
182