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
22 static int
mktemp_cb(const char * path,int flags)23 mktemp_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). */
33 char *
_mktemp(char * path)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
44 char *
mktemp(char * path)45 mktemp(char *path)
46 {
47 return _mktemp(path);
48 }
49