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
|
#include <stdlib.h> /* exit(3), */
#include <unistd.h> /* fork(2), sleep(3), */
#include <sys/types.h> /* wait(2), */
#include <sys/wait.h> /* wait(2), */
int main(int argc, char *argv[])
{
int child_status;
int status;
switch (fork()) {
case -1:
exit(EXIT_FAILURE);
case 0: /* Child */
argc > 1 && sleep(2);
exit(EXIT_SUCCESS);
default: /* Parent */
argc <= 1 && sleep(2);
status = wait(&child_status);
if (status < 0 || !WIFEXITED(child_status))
exit(EXIT_FAILURE);
exit(WEXITSTATUS(child_status));
}
}
|
