1 /* $OpenBSD: aa.c,v 1.1 2014/11/23 08:46:49 guenther Exp $ */
2
3 /*
4 * Copyright (c) 2014 Philip Guenther <guenther@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <pthread.h>
22
23 #define CALLBACK(file, name) \
24 static void name(void) \
25 { \
26 fprintf(file, "libaa "#name"\n"); \
27 fflush(file); \
28 }
29
CALLBACK(stdout,cleanup)30 CALLBACK(stdout, cleanup)
31
32 void
33 aa(void)
34 {
35 atexit(cleanup);
36 }
37
38 static FILE *otherf;
39
CALLBACK(stdout,atfork_prepare)40 CALLBACK(stdout, atfork_prepare)
41 CALLBACK(stdout, atfork_parent)
42 CALLBACK(otherf, atfork_child)
43
44 void
45 aa_atfork(FILE *f)
46 {
47 otherf = f;
48 pthread_atfork(atfork_prepare, atfork_parent, atfork_child);
49 }
50