mkdtemp.c revision 1475:0c7070c5774f 
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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29/*
30 * mkdtemp(3C) - create a directory with a unique name.
31 */
32
33#pragma weak mkdtemp = _mkdtemp
34
35#include "synonyms.h"
36
37#include <alloca.h>
38#include <errno.h>
39#include <stdlib.h>
40#include <string.h>
41#include <sys/stat.h>
42
43char *
44mkdtemp(char *template)
45{
46	char *t = alloca(strlen(template) + 1);
47	char *r;
48
49	/* Save template */
50	(void) strcpy(t, template);
51	for (; ; ) {
52		r = mktemp(template);
53
54		if (*r == '\0')
55			return (NULL);
56
57		if (mkdir(template, 0700) == 0)
58			return (r);
59
60		/* Other errors indicate persistent conditions. */
61		if (errno != EEXIST)
62			return (NULL);
63
64		/* Reset template */
65		(void) strcpy(template, t);
66	}
67}
68