mkconfigs.c

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    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 
   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 
   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 
   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 
   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 
  133 void make_configs (FILE *configfile, FILE *sourcefile)
  134 {
  135         make_intro (sourcefile);
  136         make_lines (configfile, sourcefile);
  137         make_ending (sourcefile);
  138 }
  139 
  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 */

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FreeBSD/Linux Kernel Cross Reference sys/scripts/mkconfigs.c

FreeBSD/Linux Kernel Cross Reference
sys/scripts/mkconfigs.c