//fichier tst-fork.cpp , Patrick TRAU - IPST ULP
#include <iostream.h>
#include <unistd.h>

//pour un petit tuto : http://pficheux.free.fr/articles/lmf/threads/
// ou http://www.estvideo.com/dew/index/page/programmation-systeme-linux

int glob;

main (int argc, char *argv[])
{
  pid_t pid;
  int duree;
  glob = 1;
  duree=1;
  if(argc==2)duree=atoi(argv[1]);
  
  pid = fork();
  if (pid == 0) 
   {
    /* Dans le fils */
    cout<<"Je suis le fils, pid = "<< getpid() <<", glob = "<< glob <<"\n";
    int i;
    for(i=0;i<3;i++)
     {
      cout<<"boucle fils "<<i<<", glob = "<< glob <<"\n";
      sleep (duree*2);
      glob++;
     }
    //system("wc /usr/bin/*");
    cout<<"Fin du fils, glob = "<< glob <<"\n";
    exit (0);
   }
  else if (pid > 0) {
    /* Dans le pere */
    cout<<"Je suis le pere, pid = "<< getpid() <<", glob = "<< glob <<"\n";
    int i;
    for(i=0;i<5;i++)
     {
      cout<<"boucle pere "<<i<<", glob = "<< glob <<"\n";
      sleep (duree);
      glob++;
     }
    cout<<"Fin du pere, glob = "<< glob <<"\n";
    exit (0);
  }
  else {
    /* Erreur */
    perror ("fork");
    exit (1);
  }
}

Patrick TRAU, ULP - IPST nov 05