LXR linux-old/scripts/mkconfigs.c

   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
  30static 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
  59int include_all_lines = 1;      // whether to include "=n" lines in the output
  60
  61void 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
  69void 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
  79void 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
  86void 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
 133void make_configs (FILE *configfile, FILE *sourcefile)
 134{
 135        make_intro (sourcefile);
 136        make_lines (configfile, sourcefile);
 137        make_ending (sourcefile);
 138}
 139
 140int 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