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 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 38 no_ret(int i) 39 { 40 exit(i); 41 } 42 43 int 44 main(void) 45 { 46 var_arg("Test output: %d\n", 42); 47 no_ret(0); 48 } 49