More missing lines from <sys/unistd.h>

[Victor Schneider <vischne at ibm dot net>]

Missing lines from <sys/unistd.h> (taken from linux/usr/include/sys/unistd.h):


/* Process the arguments in ARGV (ARGC of them, minus
   the program name) for options given in OPTS.

   If `opterr' is zero, no messages are generated
   for invalid options; it defaults to 1.
   `optind' is the current index into ARGV.
   `optarg' is the argument corresponding to the current option.
   Return the option character from OPTS just read.
   Return -1 when there are no more options.
   For unrecognized options, or options missing arguments,
   `optopt' is set to the option letter, and '?' is returned.

   The OPTS string is a list of characters which are recognized option
   letters, optionally followed by colons, specifying that that letter
   takes an argument, to be placed in `optarg'.

   If a letter in OPTS is followed by two colons, its argument is optional.
   This behavior is specific to the GNU `getopt'.

   The argument `--' causes premature termination of argument scanning,
   explicitly telling `getopt' that there are no more options.

   If OPTS begins with `--', then non-option arguments
   are treated as arguments to the option '\0'.
   This behavior is specific to the GNU `getopt'.  */
extern int _EXFUN (getopt, (int __argc, char *__const * __argv,
			__const char *__opts));
extern int opterr;
extern int optind;
extern int optopt;
extern char *optarg;


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