I've been having a heck of a time trying to link filesystem
into my program on my Unix
machine and so I'm going to give up and try another library if a good one exists. Come to think of it, the only functionalities I need are:
(1) Verifying the existence of a folder by its full path given by a user in the command line
(2) Checking whether a filename/extension combination exists in a directory given by a user in the command line
Can I get that from the standard library?