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Old stuff/ecole_etude_fac_de_pau/licence_3/systeme-d-exploitation/tp4/exo2.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <errno.h>
#include <string.h>
#include <signal.h>

char* test=NULL;


void fonction(int n)
{
  char* test;
  key_t cle= ftok("./prout",0);  
  int id;
  id = shmget(cle,0,0);
  if (id == -1)
    {
      perror("shmget");
      exit(-1);
    }
  //      printf("Id = %d\n",id);
  test = (char*)shmat(id,0, 0);
  printf("On lit %s\n",test);
  shmdt(test);   
  exit(-1);
}


int main(int argc, char** argv)
{
 

  printf("J ai le pid: %d\n",getpid());
  //char* test=NULL;
  key_t cle= ftok("./prout",0);
  int id;
  
  
  id = shmget(cle,100*sizeof(char),IPC_CREAT|IPC_EXCL|0777);
  if (id == -1)
    {
      perror("shmget");
      exit(-1);
    }
  //     printf("Id = %d\n",id);
  test = (char*)shmat(id,0, 0);
  if ((int)test == -1) { perror("error shmat");  exit(-1); }
  
  //	printf("Adresse %d\n",test);

  while(strcmp("exit\n",test) != 0)
    {
     fgets(test,100,stdin);
     printf("On ecrit : %s\n",test);
    }

  shmdt(test);
  shmctl(id, IPC_RMID, NULL);
  
  
  return 1;
}