TD1/exo.c

   1 #include <sys/types.h>
   2 #include <sys/wait.h>
   3
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7
   8 void show_proc_pids() {
   9     pid_t current_pid = getpid();
  10     pid_t parent_pid = getppid();
  11
  12     printf("[%d] Mon PID: %d\n", current_pid, current_pid);
  13     printf("[%d] PID du parent: %d\n", current_pid, parent_pid);
  14 }
  15
  16 int main() {
  17     int status = 0;
  18     printf("Courant:\n");
  19     show_proc_pids();
  20
  21     pid_t rtf = fork();
  22
  23     if (rtf == -1) {
  24         printf("Erreur de clonage\n");
  25         exit(EXIT_FAILURE);
  26     } else if (rtf == 0) {
  27         printf("Fils:\n");
  28         show_proc_pids();
  29         exit(EXIT_FAILURE);
  30     } else {
  31         printf("Parent:\n");
  32         show_proc_pids();
  33         pid_t rtw = wait(&status);
  34         system("ps aux");
  35     }
  36
  37     return EXIT_SUCCESS;
  38 }