1 /* $OpenBSD: execve.c,v 1.5 2011/11/25 00:31:43 guenther 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 *bad_argv[] = { 50 "/NO SUCH FILE", 51 NULL 52 }; 53 char *new_argv[] = { 54 "/bin/sh", 55 "-c", 56 "sleep 3; echo 'This line should appear after the execve'", 57 NULL 58 }; 59 60 char * should_succeed = "This line should be displayed\n"; 61 62 void * 63 other(void *arg) 64 { 65 sleep(2); 66 printf("%s\n", (char *)arg); 67 return NULL; 68 } 69 70 int 71 main(int argc, char *argv[]) 72 { 73 int fd; 74 pthread_t t1; 75 76 printf("This is the first message\n"); 77 if (isatty(STDOUT_FILENO)) { 78 char *ttynm; 79 80 CHECKn(ttynm = ttyname(STDOUT_FILENO)); 81 printf("tty is %s\n", ttynm); 82 CHECKe(fd = open(ttynm, O_RDWR)); 83 } else { 84 printf("IGNORED: stdout is not a tty: this test needs a tty\n"); 85 SUCCEED; 86 } 87 88 CHECKn(printf("This output is necessary to set the stdout fd to NONBLOCKING\n")); 89 90 /* create another thread to make things interesting */ 91 CHECKr(pthread_create(&t1, NULL, other, "Should see this too")); 92 93 /* do a dup2 */ 94 CHECKe(dup2(fd, STDOUT_FILENO)); 95 CHECKe(write(STDOUT_FILENO, should_succeed, 96 (size_t)strlen(should_succeed))); 97 CHECKn(execve(bad_argv[0], bad_argv, environ)); 98 pthread_join(t1, NULL); 99 CHECKr(pthread_create(&t1, NULL, other, "failed!")); 100 sleep(1); 101 CHECKe(execve(new_argv[0], new_argv, environ)); 102 DIE(errno, "execve %s", new_argv[0]); 103 } 104 105