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Old stuff/ecole_etude_fac_de_pau/licence_3/systeme-d-exploitation/tp4/exo2b.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>



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)
{
  pid_t pid;
  char* test=NULL;
  key_t cle= ftok("./prout",0);
  int id;
  const char source[] = "salut";
  
  
  id = shmget(cle,0,0);
  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); }

  char temp[100];
  while(strcmp("exit\n",test) != 0)
    {
      sleep(1);
      if (strcmp(temp,test)!=0)
	{
      printf("On lit : %s\n",test);
      memcpy(temp,test,sizeof(char)*100);
	}
    }
 
  
  
  return 1;
}