| 1 | #include <unistd.h> |
| 2 | #include <signal.h> |
| 3 | #include <sys/wait.h> |
| 4 | #include <stdio.h> |
| 5 | #include <stdlib.h> |
| 6 | |
| 7 | static void sigintP() |
| 8 | { |
| 9 | printf("pid=%d\n", getpid()); |
| 10 | signal(SIGINT, sigintP); |
| 11 | } |
| 12 | |
| 13 | static void sigalrm() |
| 14 | { |
| 15 | exit(1); |
| 16 | } |
| 17 | |
| 18 | static void sigintF() |
| 19 | { |
| 20 | signal(SIGINT, SIG_IGN); |
| 21 | signal(SIGALRM, sigalrm); |
| 22 | alarm(5); |
| 23 | } |
| 24 | |
| 25 | static void sigchld() |
| 26 | { |
| 27 | int status; |
| 28 | wait(&status); |
| 29 | exit(0); |
| 30 | } |
| 31 | |
| 32 | int main(void) |
| 33 | { |
| 34 | signal(SIGCHLD, sigchld); |
| 35 | if (fork() == 0) { |
| 36 | signal(SIGINT, sigintF); |
| 37 | while (1) { |
| 38 | printf("ici fils\n"); |
| 39 | sleep(1); |
| 40 | } |
| 41 | } |
| 42 | while (1) { |
| 43 | signal(SIGINT, sigintP); |
| 44 | printf("ici pere\n"); |
| 45 | sleep(1); |
| 46 | } |
| 47 | } |