include/getopt.h

   1 /*
   2  * getopt.h - a simple getopt(3) implementation.
   3  *
   4  * Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation.
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #ifndef __GETOPT_H
  21 #define __GETOPT_H
  22
  23 extern int opterr;
  24 extern int optind;
  25 extern int optopt;
  26 extern char *optarg;
  27
  28 /*
  29  * Simple getopt(3) implementation.
  30  * This version of getopt does not take long options but should
  31  * otherwise behave like one expects.
  32  *
  33  * - It takes ':' in optstring for required arguments and '::'
  34  *   for optional arguments.
  35  * - arguments can be followed directly by optargs (like -loptarg)
  36  *   or in the next argv[] element (like -l optarg).
  37  * - arguments can be grouped together (like ls -alR)
  38  * - options can be mixed with nonoptions (like ls /bin -R)
  39  */
  40
  41 int getopt(int argc, char *argv[], char *optstring);
  42
  43 /*
  44  * We do not start a new process for each getopt() run, so we
  45  * need this function to reset the static variables.
  46  */
  47 void getopt_reset(void);
  48
  49 #endif /* __GETOPT_H */