Having trouble with fork(), pipe(), dup2() and exec() in C

Question

Here\'s my code:

#include 
#include 
#include 
#include 
#include 

#         


        

Answer 1

the file descriptors from the pipe are reference counted, and incremented with each fork. for every fork, you have to issue a close on both descriptors in order to reduce the reference count to zero and allow the pipe to close. I'm guessing.