/*

 * 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.

 */

/*

 * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T

 * All Rights Reserved

 *

 * Portions of this source code were derived from Berkeley

 * 4.3 BSD under license from the regents of the University of

 * California.

 */

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

#include <sys/feature_tests.h>

#if !defined(_LP64) && _FILE_OFFSET_BITS == 64

#define	mkstemp		mkstemp64

#define	mkstemps	mkstemps64

#define	libc_mkstemps	libc_mkstemps64		/* prefer unique statics */

#pragma weak _mkstemp64 = mkstemp64

#else

#pragma weak _mkstemp = mkstemp

#endif

#include "lint.h"

#include <sys/fcntl.h>

#include <stdlib.h>

#include <string.h>

#include <errno.h>

#include <alloca.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

extern char *libc_mktemps(char *, int);

static int

libc_mkstemps(char *as, int slen)

{

	int	fd;

	int	len;

	char	*tstr, *str, *mkret;

	if (as == NULL || *as == NULL)

		return (-1);

	len = (int)strlen(as);

	tstr = alloca(len + 1);

	(void) strcpy(tstr, as);

	if (slen < 0 || slen >= len)

		return (-1);

	str = tstr + (len - 1 - slen);

	/*

	 * The following for() loop is doing work.  mktemp() will generate

	 * a different name each time through the loop.  So if the first

	 * name is used then keep trying until you find a free filename.

	 */

	for (;;) {

		if (*str == 'X') { /* If no trailing X's don't call mktemp. */

			mkret = libc_mktemps(as, slen);

			if (*mkret == '\0') {

				return (-1);

			}

		}

#if _FILE_OFFSET_BITS == 64

		if ((fd = open64(as, O_CREAT|O_EXCL|O_RDWR, 0600)) != -1) {

			return (fd);

		}

#else

		if ((fd = open(as, O_CREAT|O_EXCL|O_RDWR, 0600)) != -1) {

			return (fd);

		}

#endif  /* _FILE_OFFSET_BITS == 64 */

		/*

		 * If the error condition is other than EEXIST or if the

		 * file exists and there are no X's in the string

		 * return -1.

		 */

		if ((errno != EEXIST) || (*str != 'X')) {

			return (-1);

		}

		(void) strcpy(as, tstr);

	}

}

int

mkstemp(char *as)

{

	return (libc_mkstemps(as, 0));

}

int

mkstemps(char *as, int slen)

{

	return (libc_mkstemps(as, slen));

}