xref: /openssh-portable/regress/mkdtemp.c (revision 829fc28a)
1 /*
2  * Copyright (c) 2017 Colin Watson <cjwatson@debian.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 /* Roughly equivalent to "mktemp -d -t TEMPLATE", but portable. */
18 
19 #include "includes.h"
20 
21 #include <limits.h>
22 #include <stdarg.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <unistd.h>
26 
27 #include "log.h"
28 
29 static void
usage(void)30 usage(void)
31 {
32 	fprintf(stderr, "mkdtemp template\n");
33 	exit(1);
34 }
35 
36 int
main(int argc,char ** argv)37 main(int argc, char **argv)
38 {
39 	const char *base;
40 	const char *tmpdir;
41 	char template[PATH_MAX];
42 	int r;
43 	char *dir;
44 
45 	if (argc != 2)
46 		usage();
47 	base = argv[1];
48 
49 	if ((tmpdir = getenv("TMPDIR")) == NULL)
50 		tmpdir = "/tmp";
51 	r = snprintf(template, sizeof(template), "%s/%s", tmpdir, base);
52 	if (r < 0 || (size_t)r >= sizeof(template))
53 		fatal("template string too long");
54 	dir = mkdtemp(template);
55 	if (dir == NULL) {
56 		perror("mkdtemp");
57 		exit(1);
58 	}
59 	puts(dir);
60 	return 0;
61 }
62