Commit | Line | Data |
---|---|---|
01d700ab JB |
1 | #include <unistd.h> |
2 | #include <stdio.h> | |
3 | #include <stdlib.h> | |
4 | #include <sys/types.h> | |
5 | #include <wait.h> | |
6 | ||
7 | int main() | |
8 | { | |
9 | pid_t pid; | |
10 | ||
11 | if ((pid = fork()) == -1) { | |
12 | perror("erreur"); | |
13 | exit(EXIT_FAILURE); | |
14 | } else if (pid == 0) { | |
15 | execlp("who", "who", NULL); | |
16 | perror("execlp"); | |
17 | exit(1); | |
18 | } | |
19 | ||
20 | // without it just exec with the & | |
21 | // with it exec with the ; | |
22 | wait(NULL); | |
23 | ||
24 | if ((pid = fork()) == -1) { | |
25 | perror("erreur"); | |
26 | exit(EXIT_FAILURE); | |
27 | } else if (pid == 0) { | |
28 | execlp("ps", "ps", NULL); | |
29 | perror("execlp"); | |
30 | exit(1); | |
31 | } | |
32 | ||
33 | wait(NULL); | |
34 | ||
35 | execlp("ls", "ls", "-l", NULL); | |
36 | perror("execlp"); | |
37 | } |