Enviornment Variables
	Declaring
	Path
	Fixed Position
	Adding
	Deleting
	strncmp
	replacement
		How
		When


Execing
	Choosing the right one
	Finding the executable
	What happens on error
	What about shell scripts
	What about permissions and owners and suid
	Waiting and waitpid and when to print the prompt
	What if the kid never exits?

File Redirection
	dup2
		errors
		fd 0
		fd 1
		fd 2
	open
		setting permissions
		errors


Piping
	pipe
	be sure to close
	be SURE to close
	symptiums of failure to close
	circular pipes


GLOBing
	just run glob

Changing directories
	chdir
	errors
	permissions


Parsing
	Replace vars first
	Glob second
	Can be recursive

Choosing the right language
	C++ is kinda bad
		char* vs string
	Python or Perl or PHP might be better
		need pipe, dup2, exec
		no credit for builtins


Extra Credit
	Readline +1
	Perfect Parsing +1
	Vending machine??