TD3/exo4/exo4.c

   1 #include <unistd.h>
   2 #include <signal.h>
   3 #include <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         return 0;
  48 }