blob: f7988457df9a9e8dd822bc8229aded047da4311d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/* ==== test_execve.c ============================================================
* Copyright (c) 1994 by Chris Provenzano, proven@athena.mit.edu
*
* Description : Test execve() and dup2() calls.
*
* 1.00 94/04/29 proven
* -Started coding this file.
*/
#define PTHREAD_KERNEL
#include <pthread.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
extern char **environ;
char *argv[] = {
"/bin/echo",
"This message should be displayed after the execve system call",
NULL
};
char * should_succeed = "This line should be displayed\n";
char * should_fail = "Error: This line should NOT be displayed\n";
main()
{
pthread_t thread;
int fd;
pthread_init();
printf("This is the first message\n");
if (isatty(1)) {
if ((fd = open(ttyname(1), O_RDWR)) < OK) {
printf("Error: opening tty\n");
exit(1);
}
} else {
printf("Error: stdout not a tty\n");
exit(1);
}
printf("This output is necessary to set the stdout fd to NONBLOCKING\n");
/* do a dup2 */
dup2(fd, 1);
write(1, should_succeed, (size_t)strlen(should_succeed));
machdep_sys_write(1, should_fail, strlen(should_fail));
if (execve(argv[0], argv, environ) < OK) {
printf("Error: execve\n");
exit(1);
}
PANIC();
}
|
