1*2633Sahl /*
2*2633Sahl * CDDL HEADER START
3*2633Sahl *
4*2633Sahl * The contents of this file are subject to the terms of the
5*2633Sahl * Common Development and Distribution License (the "License").
6*2633Sahl * You may not use this file except in compliance with the License.
7*2633Sahl *
8*2633Sahl * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*2633Sahl * or http://www.opensolaris.org/os/licensing.
10*2633Sahl * See the License for the specific language governing permissions
11*2633Sahl * and limitations under the License.
12*2633Sahl *
13*2633Sahl * When distributing Covered Code, include this CDDL HEADER in each
14*2633Sahl * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*2633Sahl * If applicable, add the following below this CDDL HEADER, with the
16*2633Sahl * fields enclosed by brackets "[]" replaced with your own identifying
17*2633Sahl * information: Portions Copyright [yyyy] [name of copyright owner]
18*2633Sahl *
19*2633Sahl * CDDL HEADER END
20*2633Sahl */
21*2633Sahl
22*2633Sahl /*
23*2633Sahl * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24*2633Sahl * Use is subject to license terms.
25*2633Sahl */
26*2633Sahl
27*2633Sahl #pragma ident "%Z%%M% %I% %E% SMI"
28*2633Sahl
29*2633Sahl #include <assert.h>
30*2633Sahl #include <setjmp.h>
31*2633Sahl #include <signal.h>
32*2633Sahl #include <unistd.h>
33*2633Sahl #include <stdlib.h>
34*2633Sahl #include <stdio.h>
35*2633Sahl #include <fcntl.h>
36*2633Sahl
37*2633Sahl static sigjmp_buf env;
38*2633Sahl
39*2633Sahl static void
interrupt(int sig)40*2633Sahl interrupt(int sig)
41*2633Sahl {
42*2633Sahl siglongjmp(env, sig);
43*2633Sahl }
44*2633Sahl
45*2633Sahl int
main(int argc,char * argv[])46*2633Sahl main(int argc, char *argv[])
47*2633Sahl {
48*2633Sahl const char *file = "/dev/null";
49*2633Sahl int i, n, fds[10];
50*2633Sahl struct sigaction act;
51*2633Sahl
52*2633Sahl if (argc > 1) {
53*2633Sahl (void) fprintf(stderr, "Usage: %s\n", argv[0]);
54*2633Sahl return (EXIT_FAILURE);
55*2633Sahl }
56*2633Sahl
57*2633Sahl act.sa_handler = interrupt;
58*2633Sahl act.sa_flags = 0;
59*2633Sahl
60*2633Sahl (void) sigemptyset(&act.sa_mask);
61*2633Sahl (void) sigaction(SIGUSR1, &act, NULL);
62*2633Sahl
63*2633Sahl closefrom(0);
64*2633Sahl n = 0;
65*2633Sahl
66*2633Sahl /*
67*2633Sahl * With all of our file descriptors closed, wait here spinning in bogus
68*2633Sahl * ioctl() calls until DTrace hits us with a SIGUSR1 to start the test.
69*2633Sahl */
70*2633Sahl if (sigsetjmp(env, 1) == 0) {
71*2633Sahl for (;;)
72*2633Sahl (void) ioctl(-1, -1, NULL);
73*2633Sahl }
74*2633Sahl
75*2633Sahl /*
76*2633Sahl * To test the fds[] array, we open /dev/null (a file with reliable
77*2633Sahl * pathname and properties) using various flags and seek offsets.
78*2633Sahl */
79*2633Sahl fds[n++] = open(file, O_RDONLY);
80*2633Sahl fds[n++] = open(file, O_WRONLY);
81*2633Sahl fds[n++] = open(file, O_RDWR);
82*2633Sahl
83*2633Sahl fds[n++] = open(file, O_RDWR | O_APPEND | O_CREAT | O_DSYNC |
84*2633Sahl O_LARGEFILE | O_NOCTTY | O_NONBLOCK | O_NDELAY | O_RSYNC |
85*2633Sahl O_SYNC | O_TRUNC | O_XATTR);
86*2633Sahl
87*2633Sahl fds[n++] = open(file, O_RDWR);
88*2633Sahl (void) lseek(fds[n - 1], 123, SEEK_SET);
89*2633Sahl
90*2633Sahl /*
91*2633Sahl * Once we have all the file descriptors in the state we want to test,
92*2633Sahl * issue a bogus ioctl() on each fd with cmd -1 and arg NULL to whack
93*2633Sahl * our DTrace script into recording the content of the fds[] array.
94*2633Sahl */
95*2633Sahl for (i = 0; i < n; i++)
96*2633Sahl (void) ioctl(fds[i], -1, NULL);
97*2633Sahl
98*2633Sahl assert(n <= sizeof (fds) / sizeof (fds[0]));
99*2633Sahl exit(0);
100*2633Sahl }
101