1 /* $OpenBSD: fcntl.c,v 1.1.1.1 2001/08/15 14:37:11 fgsch Exp $ */
2 /*
3 * Copyright (c) 1993, 1994, 1995, 1996 by Chris Provenzano and contributors,
4 * proven@mit.edu All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Chris Provenzano,
17 * the University of California, Berkeley, and contributors.
18 * 4. Neither the name of Chris Provenzano, the University, nor the names of
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO, THE REGENTS OR
26 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 /*
36 * Test fcntl() flag inheritance across a fork()
37 */
38
39 #include <sys/types.h>
40 #include <sys/wait.h>
41 #include <fcntl.h>
42 #include <stdio.h>
43 #include <unistd.h>
44 #include "test.h"
45
46 int
main()47 main()
48 {
49 int flags, newflags, child;
50
51 CHECKe(flags = fcntl(0, F_GETFL));
52 printf("flags = %x\n", flags);
53
54 CHECKe(child = fork());
55 switch(child) {
56 case 0: /* child */
57 CHECKe(execlp("./pthread_create", "./pthread_create",
58 (char *)NULL));
59 /* NOTREACHED */
60 default: /* parent */
61 CHECKe(wait(NULL));
62 break;
63 }
64
65 while(1){
66 CHECKe(newflags = fcntl(0, F_GETFL));
67 printf ("parent %d flags = %x\n", child, newflags);
68 sleep(1);
69 }
70 }
71