dist/lib/getopt.c

1 /*	$NetBSD: getopt.c,v 1.1.1.1 2016/01/13 03:15:30 christos Exp $	*/
4    NOTE: getopt is now part of the C library, so if you don't know what
26 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
69    contain conflicting prototypes for getopt.  */
93 /* This version of `getopt' appears to the caller like standard Unix `getopt'
97    As `getopt' works, it permutes the elements of ARGV so that,
107 #include "getopt.h"
109 /* For communication from `getopt' to the caller.
110    When `getopt' finds an option that takes an argument,
119    and for communication between successive calls to `getopt'.
121    On entry to `getopt', zero means this is the first call; initialize.
123    When `getopt' returns -1, this is the index of the first of the
132 /* Formerly, initialization of getopt depended on optind==0, which
133    causes problems with re-calling getopt as programs generally don't
154    system's own getopt implementation.  */
185    `--' can cause `getopt' to return -1 with `optind' != ARGC.  */
272    is valid for the getopt call we must make sure that the ARGV passed
273    to getopt is that one passed to the process.  */
472    (aside from the initial '-') are option characters.  If `getopt'
476    If `getopt' finds another option character, it returns that character,
477    updating `optind' and `nextchar' so that the next call to `getopt' can
480    If there are no more option characters, `getopt' returns -1.
505    When `getopt' finds a long-named option, it returns 0 if that option's
990 getopt (argc, argv, optstring)
1007    the above definition of `getopt'.  */
1021       c = getopt (argc, argv, "abc:d:0123456789");
1059 	  printf ("?? getopt returned character code 0%o ??\n", c);