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@aLucaz
Created April 4, 2019 21:02
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#define BUFSIZE1 10
#define BUFSIZE2 13
#define WLOOP 5
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <sys/wait.h>
int main(void){
int fd[2];
pid_t haschild;
pipe(fd); /* pipe a */
dup2(fd[0], STDIN_FILENO);
dup2(fd[1], STDOUT_FILENO);
close(fd[0]);
close(fd[1]);
pipe(fd); /* pipe b */
haschild = fork();
if (haschild > 0)
dup2(fd[1], STDOUT_FILENO); /* parent(A) redirects std output */
else if (!haschild)
dup2(fd[0], STDIN_FILENO); /* child(B) redirects std input */
close(fd[0]);
close(fd[1]);
//luego de tener las cañerias unidireccionales
char message1[] = "Hello son";
char message2[] = "Hello father";
char respuesta1[BUFSIZE2];
char respuesta2[BUFSIZE1];
if (haschild > 0){
write(STDOUT_FILENO,message1,10);
close(STDOUT_FILENO);
read(STDIN_FILENO,respuesta1,13);
close(STDIN_FILENO);
fprintf(stderr,"respuesta de mi hijo: %s\n",respuesta1);
}
else{
write(STDOUT_FILENO,message2,13);
close(STDOUT_FILENO);
read(STDIN_FILENO,respuesta2,10);
close(STDIN_FILENO);
fprintf(stderr,"respuesta de mi padre: %s\n",respuesta2);
}
return 0;
}
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