1 /* $Id: test-attribute.c,v 1.1 2020/06/22 20:00:38 schwarze Exp $ */
2 /*
3 * Copyright (c) 2020 Ingo Schwarze <schwarze@openbsd.org>
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 <stdarg.h>
19 #include <stdio.h>
20 #include <stdlib.h>
21
22 void var_arg(const char *, ...)
23 __attribute__((__format__ (__printf__, 1, 2)));
24 void no_ret(int)
25 __attribute__((__noreturn__));
26
27 void
var_arg(const char * fmt,...)28 var_arg(const char *fmt, ...)
29 {
30 va_list ap;
31
32 va_start(ap, fmt);
33 vprintf(fmt, ap);
34 va_end(ap);
35 }
36
37 void
no_ret(int i)38 no_ret(int i)
39 {
40 exit(i);
41 }
42
43 int
main(void)44 main(void)
45 {
46 var_arg("Test output: %d\n", 42);
47 no_ret(0);
48 }
49