that shell business again.

I just thought I'd say thanks for all the advice.
Some people wanted more details on what I'm trying to do so I decided to make a new post rather than lots of separate replies.

I'm required to write "a simple Unix Shell program".
It's to act as a command interpreter and should have cd, set, echo, pwd and exit built into the shell.

commands are to be run in foreground.
when the child process dies the reason for the death should be printed to screen.

Thanks people.