1/*	$OpenBSD: mktemp.c,v 1.2 2024/01/19 19:45:02 millert Exp $ */
2/*
3 * Copyright (c) 2024 Todd C. Miller
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#include <sys/stat.h>
19#include <errno.h>
20#include <stdlib.h>
21
22static int
23mktemp_cb(const char *path, int flags)
24{
25	struct stat sb;
26
27	if (lstat(path, &sb) == 0)
28		errno = EEXIST;
29	return (errno == ENOENT ? 0 : -1);
30}
31
32/* Also called via tmpnam(3) and tempnam(3). */
33char *
34_mktemp(char *path)
35{
36	if (__mktemp4(path, 0, 0, mktemp_cb) == 0)
37		return path;
38	return NULL;
39}
40
41__warn_references(mktemp,
42    "mktemp() possibly used unsafely; consider using mkstemp()");
43
44char *
45mktemp(char *path)
46{
47	return _mktemp(path);
48}
49