| 1 | #include <assert.h> |
|---|---|
| 2 | #include <signal.h> |
| 3 | #include <stdio.h> |
| 4 | #include <unistd.h> |
| 5 | #include <sys/wait.h> |
| 6 | |
| 7 | void handler(int signo) { |
| 8 | printf(format: "SIGCHLD\n"); |
| 9 | } |
| 10 | |
| 11 | int main() { |
| 12 | void *ret = signal(SIGINT, handler: handler); |
| 13 | assert (ret != SIG_ERR); |
| 14 | |
| 15 | pid_t child_pid = fork(); |
| 16 | assert (child_pid != -1); |
| 17 | |
| 18 | if (child_pid == 0) { |
| 19 | sleep(seconds: 1); |
| 20 | _exit(status: 14); |
| 21 | } |
| 22 | |
| 23 | printf(format: "signo = %d\n", SIGCHLD); |
| 24 | printf(format: "code = %d\n", CLD_EXITED); |
| 25 | printf(format: "child_pid = %d\n", child_pid); |
| 26 | printf(format: "uid = %d\n", getuid()); |
| 27 | pid_t waited = wait(NULL); |
| 28 | assert(waited == child_pid); |
| 29 | |
| 30 | return 0; |
| 31 | } |
| 32 |