mygetwd.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1999 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h> /* needed by stat.h */
#include <sys/stat.h> /* stat */
#include <stdio.h> /* NULL */
#include <string.h> /* string functions */
#include <stdlib.h>
/*
* if the ksh PWD environment variable matches the current
* working directory, don't call getwd()
*/
char *
mygetwd(char *dir)
{
char *pwd; /* PWD environment variable value */
struct stat d_sb; /* current directory status */
struct stat tmp_sb; /* temporary stat buffer */
char *getwd();
/* get the current directory's status */
if (stat(".", &d_sb) < 0) {
return (NULL);
}
/* use $PWD if it matches this directory */
if ((pwd = getenv("PWD")) != NULL && *pwd != '\0' &&
stat(pwd, &tmp_sb) == 0 &&
d_sb.st_ino == tmp_sb.st_ino && d_sb.st_dev == tmp_sb.st_dev) {
(void) strcpy(dir, pwd);
return (pwd);
}
return (getwd(dir));
}