/*
 * 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.
 */

#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));
}