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/*	Copyright (c) 1988 AT&T	*/
23/*	  All Rights Reserved  	*/
24
25
26/*
27 * Copyright (c) 1999 by Sun Microsystems, Inc.
28 * All rights reserved.
29 */
30
31#pragma ident	"%Z%%M%	%I%	%E% SMI"
32
33#include <sys/types.h>	/* needed by stat.h */
34#include <sys/stat.h>	/* stat */
35#include <stdio.h>	/* NULL */
36#include <string.h>	/* string functions */
37#include <stdlib.h>
38
39/*
40 * if the ksh PWD environment variable matches the current
41 * working directory, don't call getwd()
42 */
43
44char *
45mygetwd(char *dir)
46{
47	char	*pwd;			/* PWD environment variable value */
48	struct	stat	d_sb;  		/* current directory status */
49	struct	stat	tmp_sb; 	/* temporary stat buffer */
50	char	*getwd();
51
52	/* get the current directory's status */
53	if (stat(".", &d_sb) < 0) {
54		return (NULL);
55	}
56	/* use $PWD if it matches this directory */
57	if ((pwd = getenv("PWD")) != NULL && *pwd != '\0' &&
58	    stat(pwd, &tmp_sb) == 0 &&
59	    d_sb.st_ino == tmp_sb.st_ino && d_sb.st_dev == tmp_sb.st_dev) {
60		(void) strcpy(dir, pwd);
61		return (pwd);
62	}
63	return (getwd(dir));
64}
65