/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (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 2008 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*

 * getcwd() returns the pathname of the current working directory.

 * On error, a NULL pointer is returned and errno is set.

 */

#pragma weak _getcwd = getcwd

#include "lint.h"

#include <sys/syscall.h>

#include <sys/types.h>

#include <errno.h>

#include <stdlib.h>

char *

getcwd(char *pathname, size_t size)

{

	int alloc = 0;

	if (size == 0) {

		errno = EINVAL;

		return (NULL);

	}

	if (pathname == NULL)  {

		if ((pathname = malloc(size)) == NULL) {

			errno = ENOMEM;

			return (NULL);

		}

		alloc = 1;

	}

	if (syscall(SYS_getcwd, pathname, size) == 0)

		return (pathname);

	if (alloc)

		free(pathname);

	return (NULL);

}