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/***************************************************************************
* mkconfigs.c
* (C) 2002 Randy Dunlap <rddunlap@osdl.org>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
# Rules for scripts/mkconfigs.c input.config output.c
# to generate configs.c from linux/.config:
# - drop lines that begin with '#'
# - drop blank lines
# - lines that use double-quotes must \\-escape-quote them
################## skeleton configs.c file: ####################
#include <linux/init.h>
#include <linux/module.h>
static char *configs[] __initdata =
<insert lines selected lines of .config, quoted, with added '\n'>,
;
################### end configs.c file ######################
* Changelog for ver. 0.2, 2002-02-15, rddunlap@osdl.org:
- strip leading "CONFIG_" from config option strings;
- use "static" and "__attribute__((unused))";
- don't use EXPORT_SYMBOL();
- separate each config line with \newline instead of space;
* Changelog for ver. 0.3, 2002-02-18, rddunlap@osdl.org:
- keep all "not set" comment lines from .config so that 'make *config'
will be happy, but don't keep other comments;
- keep leading "CONFIG_" on each line;
****************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#define VERSION "0.2"
#define LINE_SIZE 1000
int include_all_lines = 1; // whether to include "=n" lines in the output
void usage (const char *progname)
{
fprintf (stderr, "%s ver. %s\n", progname, VERSION);
fprintf (stderr, "usage: %s input.config.name path/configs.c\n",
progname);
exit (1);
}
void make_intro (FILE *sourcefile)
{
fprintf (sourcefile, "#include <linux/init.h>\n");
///// fprintf (sourcefile, "#include <linux/module.h>\n");
fprintf (sourcefile, "\n");
///// fprintf (sourcefile, "char *configs[] __initdata = {\n");
fprintf (sourcefile, "static char __attribute__ ((unused)) *configs[] __initdata = {\n");
fprintf (sourcefile, " \"CONFIG_BEGIN=n\\n\" ,\n");
}
void make_ending (FILE *sourcefile)
{
fprintf (sourcefile, " \"CONFIG_END=n\\n\"\n");
fprintf (sourcefile, "};\n");
///// fprintf (sourcefile, "EXPORT_SYMBOL (configs);\n");
}
void make_lines (FILE *configfile, FILE *sourcefile)
{
char cfgline[LINE_SIZE];
char *ch;
while (fgets (cfgline, LINE_SIZE, configfile)) {
/* kill the trailing newline in cfgline */
cfgline[strlen (cfgline) - 1] = '\0';
/* don't keep #-only line or an empty/blank line */
if ((cfgline[0] == '#' && cfgline[1] == '\0') ||
cfgline[0] == '\0')
continue;
if (!include_all_lines &&
cfgline[0] == '#') // strip out all comment lines
continue;
/* really only want to keep lines that begin with
* "CONFIG_" or "# CONFIG_" */
if (strncmp (cfgline, "CONFIG_", 7) &&
strncmp (cfgline, "# CONFIG_", 9))
continue;
/*
* use strchr() to check for "-quote in cfgline;
* if not found, output the line, quoted;
* if found, output a char at a time, with \\-quote
* preceding double-quote chars
*/
if (!strchr (cfgline, '"')) {
fprintf (sourcefile, " \"%s\\n\" ,\n", cfgline);
continue;
}
/* go to char-at-a-time mode for this config and
* precede any double-quote with a backslash */
fprintf (sourcefile, " \""); /* lead-in */
for (ch = cfgline; *ch; ch++) {
if (*ch == '"')
fputc ('\\', sourcefile);
fputc (*ch, sourcefile);
}
fprintf (sourcefile, "\\n\" ,\n");
}
}
void make_configs (FILE *configfile, FILE *sourcefile)
{
make_intro (sourcefile);
make_lines (configfile, sourcefile);
make_ending (sourcefile);
}
int main (int argc, char *argv[])
{
char *progname = argv[0];
char *configname, *sourcename;
FILE *configfile, *sourcefile;
if (argc != 3)
usage (progname);
configname = argv[1];
sourcename = argv[2];
configfile = fopen (configname, "r");
if (!configfile) {
fprintf (stderr, "%s: cannot open '%s'\n",
progname, configname);
exit (2);
}
sourcefile = fopen (sourcename, "w");
if (!sourcefile) {
fprintf (stderr, "%s: cannot open '%s'\n",
progname, sourcename);
exit (2);
}
make_configs (configfile, sourcefile);
if (fclose (sourcefile)) {
fprintf (stderr, "%s: error %d closing '%s'\n",
progname, errno, sourcename);
exit (3);
}
if (fclose (configfile)) {
fprintf (stderr, "%s: error %d closing '%s'\n",
progname, errno, configname);
exit (3);
}
exit (0);
}
/* end mkconfigs.c */
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