A2P7.c

#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <wait.h>

#define SIZE 512

int main(int argc, char **argv) {
	pid_t pid;
	int a[2], b[2], readbytes;
	char buffer[SIZE];

	pipe (a);
	pipe (b);

	if((pid = fork()) == 0) {
		close(a[1]); //cierra escritura
		close(b[0]); //cierra lectura
		while((readbytes = read(a[0],buffer,SIZE)) > 0)
			write(1,buffer, readbytes);
		close(a[0]);
		strcpy(buffer, "Soy tu hijo hablandote por la otra tuberia\n");
		write(b[1],buffer, strlen(buffer));
		close(b[1]);
	}
	else{
		close(a[0]); //cierra lectura
		close(b[1]); //cierra escritura
		strcpy(buffer, "Soy tu padre hablandote por una tuberia\n");
			write(a[1],buffer,strlen(buffer));
		close(a[1]);
		while((readbytes = read(b[0],buffer,SIZE)) > 0)
			write(1,buffer, readbytes);
		close(b[0]);
	}
	waitpid (pid, NULL,0);
	exit(0);
}