Lab - xprog

Usage:

xprog (program name)

Checks if this is a suitable name for a program, and if so, launches editor and makes sure file is executable by default.

1. don't allow use of system program names like "ls"
2. use "which" to see if command exists
3. check return code "$?"
4. touch (program)
5. make new prog executable
6. launch editor

Testing

• xprog grep - rejected
• xprog newprog - ok, created, is executable, editor launched