dirname.c revision 986:1fdad750240e 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <locale.h>
30#include <stdio.h>
31#include <stdlib.h>
32#include <string.h>
33#include <unistd.h>
34#include <libintl.h>
35
36int
37main(int argc, char **argv)
38{
39	char	*p;
40	char	*string;
41
42	/*
43	 * For better performance, defer the setlocale()/textdomain()
44	 * calls until they get really required.
45	 */
46#if !defined(TEXT_DOMAIN)
47#define	TEXT_DOMAIN "SYS_TEST"
48#endif
49	if (argc == 1) {
50		(void) puts(".");
51		return (0);
52	}
53	if (strcmp(argv[1], "--") == 0) {
54		argv++;
55		argc--;
56		if (argc == 1) {
57			(void) puts(".");
58			return (0);
59		}
60	}
61	if (argc > 2) {
62		(void) setlocale(LC_ALL, "");
63		(void) textdomain(TEXT_DOMAIN);
64		(void) fprintf(stderr, gettext("Usage: dirname [ path ]\n"));
65		return (1);
66	}
67
68	string = argv[1];
69
70	if (*string == '\0') {
71		(void) puts(".");
72		return (0);
73	}
74
75	/* remove trailing slashes */
76	p = string + strlen(string) - 1;
77	while (p >= string && *p == '/')
78		*p-- = '\0';
79
80	if (*string == '\0') {
81		/* string contained only slashes */
82		(void) puts("/");
83		return (0);
84	}
85
86	/* remove non-slashes */
87	while (p >= string && *p != '/')
88		*p-- = '\0';
89
90	if (*string == '\0') {
91		/* string did not begin with a slash */
92		(void) puts(".");
93		return (0);
94	}
95
96	/* remove slashes delimiting dirname and basename */
97	while (p >= string && *p == '/')
98		*p-- = '\0';
99
100	if (*string == '\0') {
101		/* no dirname part found */
102		(void) puts("/");
103		return (0);
104	}
105	/* now string points to dirname part */
106	(void) puts(string);
107	return (0);
108}
109