C basic shell external command I/O redirection Pipeline

Closed - This job posting has been filled and work has been completed.

Job Description

the program must compile and run on the OS lab Linux machines.
Your shell must support the internal commands described below. Feel free to include
other internal commands if you find this useful for your own testing.
-program must use the environment variable OSPATH as a list of directories to
search. It is possible that this environment variable will exist when your shell is started
more requirement will be emailed