open the .file
	for each line
		doIt()
close


while true
	get a line of input
	split it
	wordexp
	doIt()


doIt()
	if ";"
		doIT(left)
		doIt(right)
	if "."
		open
		for each line
			doIt()
		close
	if "cd"
		chdir
		error check
	else if "exit"
		cout 
		save histroy
		exit
	else if contains "="
		putenv
	else
		fork
		if kid
			if > // output which is fd = 1
				dup2
				remove from list			
			if < // input which is fd=0
				dup2
				remove from list			
			for each thing in path
				execvp(argv[0], argv);	
			exit
		if parent
			waitpid