getoldopt.c revision 1.22.42.1 
1/*	$NetBSD: getoldopt.c,v 1.22.42.1 2012/10/30 18:46:07 yamt Exp $	*/
2
3/*
4 * Plug-compatible replacement for getopt() for parsing tar-like
5 * arguments.  If the first argument begins with "-", it uses getopt;
6 * otherwise, it uses the old rules used by tar, dump, and ps.
7 *
8 * Written 25 August 1985 by John Gilmore (ihnp4!hoptoad!gnu) and placed
9 * in the Public Domain for your edification and enjoyment.
10 */
11
12#if HAVE_NBTOOL_CONFIG_H
13#include "nbtool_config.h"
14#endif
15
16#include <sys/cdefs.h>
17#if !defined(lint)
18__RCSID("$NetBSD: getoldopt.c,v 1.22.42.1 2012/10/30 18:46:07 yamt Exp $");
19#endif /* not lint */
20
21#if HAVE_NBTOOL_CONFIG_H
22#include "compat_getopt.h"
23#else
24#include <getopt.h>
25#endif
26#include <stdio.h>
27#include <string.h>
28#include <stdlib.h>
29#include <unistd.h>
30#include <stdint.h>
31#include <sys/stat.h>
32#include "pax.h"
33#include "extern.h"
34
35int
36getoldopt(int argc, char **argv, const char *optstring,
37	struct option *longopts, int *idx)
38{
39	static char	*key;		/* Points to next keyletter */
40	static char	use_getopt;	/* !=0 if argv[1][0] was '-' */
41	char		c;
42	char		*place;
43
44	optarg = NULL;
45
46	if (key == NULL) {		/* First time */
47		if (argc < 2) return -1;
48		key = argv[1];
49		if (*key == '-')
50			use_getopt++;
51		else
52			optind = 2;
53	}
54
55	c = '\0';
56	if (!use_getopt) {
57		c = *key++;
58		if (c == '\0') {
59			key--;
60			use_getopt = 1;
61		}
62	}
63	if (use_getopt) {
64		if (longopts != NULL) {
65			return getopt_long(argc, argv, optstring,
66			    longopts, idx);
67		} else {
68			return getopt(argc, argv, optstring);
69		}
70	}
71
72	place = strchr(optstring, c);
73
74	if (place == NULL || c == ':') {
75		fprintf(stderr, "%s: unknown option %c\n", argv[0], c);
76		return '?';
77	}
78
79	place++;
80	if (*place == ':') {
81		if (optind < argc) {
82			optarg = argv[optind];
83			optind++;
84		} else {
85			fprintf(stderr, "%s: %c argument missing\n",
86				argv[0], c);
87			return '?';
88		}
89	}
90
91	return c;
92}
93