blob: 8a6171ebfcfad6107ff63efac0c780058cf70600 (
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
|
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main(int argc, char **argv)
{
int fildes;
if (argc < 2) {
write(STDOUT_FILENO, "nohup utility [argument...]\n", 29);
return 1;
}
if (signal(SIGHUP, SIG_IGN) == SIG_ERR) {
perror("nohup: signal");
return 1;
}
if (isatty(STDOUT_FILENO)) {
fildes = open("nohup.out", O_WRONLY | O_APPEND | O_CREAT);
if (fildes < 0) {
perror("nohup: open");
return 1;
}
if (dup2(fildes, STDOUT_FILENO) < 0) {
perror("nohup: dup2");
return 1;
}
close(fildes);
}
if (isatty(STDERR_FILENO)) {
if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) {
perror("nohup: dup2");
return 1;
}
}
execvp(argv[0], argv);
perror("nohup: execvp");
return 127 + (errno == ENOENT);
}
|
