1 /* $OpenBSD: execve.c,v 1.4 2003/09/18 01:59:58 henning 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 * Copyright (c) 1994 by Chris Provenzano, proven@athena.mit.edu 37 * 38 * Test execve() and dup2() calls. 39 */ 40 41 #include <pthread.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include <fcntl.h> 45 #include <stdio.h> 46 #include "test.h" 47 48 extern char **environ; 49 char *new_argv[] = { 50 "/bin/echo", 51 "This line should appear after the execve", 52 NULL 53 }; 54 55 char * should_succeed = "This line should be displayed\n"; 56 57 int 58 main(int argc, char *argv[]) 59 { 60 int fd; 61 62 printf("This is the first message\n"); 63 if (isatty(STDOUT_FILENO)) { 64 char *ttynm; 65 66 CHECKn(ttynm = ttyname(STDOUT_FILENO)); 67 printf("tty is %s\n", ttynm); 68 CHECKe(fd = open(ttynm, O_RDWR)); 69 } else { 70 printf("IGNORED: stdout is not a tty: this test needs a tty\n"); 71 SUCCEED; 72 } 73 74 CHECKn(printf("This output is necessary to set the stdout fd to NONBLOCKING\n")); 75 76 /* do a dup2 */ 77 CHECKe(dup2(fd, STDOUT_FILENO)); 78 CHECKe(write(STDOUT_FILENO, should_succeed, 79 (size_t)strlen(should_succeed))); 80 CHECKe(execve(new_argv[0], new_argv, environ)); 81 DIE(errno, "execve %s", new_argv[0]); 82 } 83