1178476Sjb/* 2178476Sjb * CDDL HEADER START 3178476Sjb * 4178476Sjb * The contents of this file are subject to the terms of the 5178476Sjb * Common Development and Distribution License (the "License"). 6178476Sjb * You may not use this file except in compliance with the License. 7178476Sjb * 8178476Sjb * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9178476Sjb * or http://www.opensolaris.org/os/licensing. 10178476Sjb * See the License for the specific language governing permissions 11178476Sjb * and limitations under the License. 12178476Sjb * 13178476Sjb * When distributing Covered Code, include this CDDL HEADER in each 14178476Sjb * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15178476Sjb * If applicable, add the following below this CDDL HEADER, with the 16178476Sjb * fields enclosed by brackets "[]" replaced with your own identifying 17178476Sjb * information: Portions Copyright [yyyy] [name of copyright owner] 18178476Sjb * 19178476Sjb * CDDL HEADER END 20178476Sjb */ 21178476Sjb 22178476Sjb/* 23178476Sjb * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24178476Sjb * Use is subject to license terms. 25178476Sjb */ 26178476Sjb 27178476Sjb#pragma ident "%Z%%M% %I% %E% SMI" 28178476Sjb 29178476Sjb#include <assert.h> 30178476Sjb#include <setjmp.h> 31178476Sjb#include <signal.h> 32178476Sjb#include <unistd.h> 33178476Sjb#include <stdlib.h> 34178476Sjb#include <stdio.h> 35178476Sjb#include <fcntl.h> 36178476Sjb 37178476Sjbstatic sigjmp_buf env; 38178476Sjb 39178476Sjbstatic void 40178476Sjbinterrupt(int sig) 41178476Sjb{ 42178476Sjb siglongjmp(env, sig); 43178476Sjb} 44178476Sjb 45178476Sjbint 46178476Sjbmain(int argc, char *argv[]) 47178476Sjb{ 48178476Sjb const char *file = "/dev/null"; 49178476Sjb int i, n, fds[10]; 50178476Sjb struct sigaction act; 51178476Sjb 52178476Sjb if (argc > 1) { 53178476Sjb (void) fprintf(stderr, "Usage: %s\n", argv[0]); 54178476Sjb return (EXIT_FAILURE); 55178476Sjb } 56178476Sjb 57178476Sjb act.sa_handler = interrupt; 58178476Sjb act.sa_flags = 0; 59178476Sjb 60178476Sjb (void) sigemptyset(&act.sa_mask); 61178476Sjb (void) sigaction(SIGUSR1, &act, NULL); 62178476Sjb 63178476Sjb closefrom(0); 64178476Sjb n = 0; 65178476Sjb 66178476Sjb /* 67178476Sjb * With all of our file descriptors closed, wait here spinning in bogus 68178476Sjb * ioctl() calls until DTrace hits us with a SIGUSR1 to start the test. 69178476Sjb */ 70178476Sjb if (sigsetjmp(env, 1) == 0) { 71178476Sjb for (;;) 72178476Sjb (void) ioctl(-1, -1, NULL); 73178476Sjb } 74178476Sjb 75178476Sjb /* 76178476Sjb * To test the fds[] array, we open /dev/null (a file with reliable 77178476Sjb * pathname and properties) using various flags and seek offsets. 78178476Sjb */ 79178476Sjb fds[n++] = open(file, O_RDONLY); 80178476Sjb fds[n++] = open(file, O_WRONLY); 81178476Sjb fds[n++] = open(file, O_RDWR); 82178476Sjb 83178476Sjb fds[n++] = open(file, O_RDWR | O_APPEND | O_CREAT | O_DSYNC | 84178476Sjb O_LARGEFILE | O_NOCTTY | O_NONBLOCK | O_NDELAY | O_RSYNC | 85229468Spjd O_SYNC | O_TRUNC | O_XATTR, 0666); 86178476Sjb 87178476Sjb fds[n++] = open(file, O_RDWR); 88178476Sjb (void) lseek(fds[n - 1], 123, SEEK_SET); 89178476Sjb 90178476Sjb /* 91178476Sjb * Once we have all the file descriptors in the state we want to test, 92178476Sjb * issue a bogus ioctl() on each fd with cmd -1 and arg NULL to whack 93178476Sjb * our DTrace script into recording the content of the fds[] array. 94178476Sjb */ 95178476Sjb for (i = 0; i < n; i++) 96178476Sjb (void) ioctl(fds[i], -1, NULL); 97178476Sjb 98178476Sjb assert(n <= sizeof (fds) / sizeof (fds[0])); 99178476Sjb exit(0); 100178476Sjb} 101