Programming :: How To Write A Toy Shell

I'm trying to write a toy linux shell. For starters this is what I'm trying to do:

1. Start a new process with fork.

2. Execute a program in the new process with execl().

3. Redirect the output from the new process from STDOUT to another file descriptor, using dup2(2).

4. In the parent process, read the output from the child process and write it to the screen.

Creating a new process and executing a program in it is no problems, the problem is that I can't seem to capture the output from it in the parent process.

Code:

//digenv
//C++arl 2011-03-24
#include <stdio.h>
#include <sys/types.h>

[code]...