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/* $OpenBSD: test_execve.c,v 1.5 2000/10/04 05:50:58 d Exp $ */
/*
* Copyright (c) 1994 by Chris Provenzano, proven@athena.mit.edu
*
* Test execve() and dup2() calls.
*/
#include <pthread.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include "test.h"
extern char **environ;
char *argv[] = {
"/bin/echo",
"This line should appear after the execve",
NULL
};
char * should_succeed = "This line should be displayed\n";
int
main()
{
int fd;
printf("This is the first message\n");
if (isatty(STDOUT_FILENO)) {
char *ttynm;
CHECKn(ttynm = ttyname(STDOUT_FILENO));
printf("tty is %s\n", ttynm);
CHECKe(fd = open(ttynm, O_RDWR));
} else
PANIC("stdout is not a tty: this test needs a tty");
CHECKn(printf("This output is necessary to set the stdout fd to NONBLOCKING\n"));
/* do a dup2 */
CHECKe(dup2(fd, STDOUT_FILENO));
CHECKe(write(STDOUT_FILENO, should_succeed,
(size_t)strlen(should_succeed)));
CHECKe(execve(argv[0], argv, environ));
DIE(errno, "execve %s", argv[0]);
}
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