Memoria Compartida - Perez Facundo - Final

#include <sys/shm.h>
#include <unistd.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <wait.h>
#include <fcntl.h>
#include<sys/ipc.h>

int main ()
{
	key_t Clave;
	int Id_Memoria;
	int * Memoria;
	int aux;
	int maxNum = 10;
	int pid1, pid2;

	Clave = ftok ("/bin/ls", 33);
	if (Clave == -1)
	{
		printf("Error, no existe la clave\n");
		exit(EXIT_FAILURE);
	}

	Id_Memoria = shmget (Clave, sizeof(int)*100, 0777 | IPC_CREAT);
	if (Id_Memoria == -1)
	{
		printf("Error, no existe el ID para la memoria\n");
		exit(EXIT_FAILURE);
	}

	Memoria = shmat (Id_Memoria, 0, 0);

	if (Memoria < 0)
	{
		printf("Error, no existe la memoria compartida\n");
		exit(EXIT_FAILURE);
	}

	*Memoria = 0;
	shmdt(Memoria);

	printf("fin primera etapa\n");

	pid1 = fork();

	if(pid1 == -1)
	{
		printf("ERROR\n");
		exit(EXIT_FAILURE);
	}

	if (pid1 == 0)
	{
		printf("Soy H1, mi PID: %d\n Mi padre es: %d\n", getpid(), getppid());
		Memoria = shmat (Id_Memoria, 0, 0);
		if (Memoria < 0)
		{
			printf("Error no se consigue la memoria compartida\n");
			exit(EXIT_FAILURE);
		}

		while (*Memoria <= maxNum)
		{
			aux=*Memoria;
			if ((aux%2) == 0)
			{
				aux++;
				if (aux <= maxNum)
					printf("%d\n", aux);
					*Memoria = aux;
			}
		}

		shmdt (Memoria);
		exit(EXIT_SUCCESS);
	}
	else
	{
		pid2 = fork();
		if(pid2 == -1)
		{
			printf("ERROR\n");
			exit(EXIT_FAILURE);
		}

		if (pid2 == 0)
		{
			Memoria = shmat (Id_Memoria, 0, 0);
			if (Memoria < 0)
			{
				printf("Error, no existe la memoria compartida\n");
				exit(EXIT_FAILURE);
			}

			while (*Memoria <= maxNum)
			{
				aux=*Memoria;
				if ((aux%2) == 1)
				{
					aux++;
					if (aux <= maxNum)
						printf("%d\n", aux);
						*Memoria = aux;
				}
			}
			shmdt (Memoria);
			printf("Soy H2, mi PID: %d\n Mi padre es: %d\n", getpid(), getppid());
			exit(EXIT_SUCCESS);
		}
		exit(EXIT_SUCCESS);
	}
}