* reuse of source code from (or not from) class
** any code from class is free to use
** code that's used unchanged doesn't need to be brought up to our standards
** anything you modify, is yours
** very limited use of other external code is OK, but also should
   meet our standards and be credited to the source
** if you've got concerns about whether some use is too much, just ask

* commenting and coding style reference
** be sure to read through the grading standards doc on the course website
** function headers in the source file please, very helpful for readers

* read and write syscalls
** in-kernel buffer size, something to use?
    > unless you're writing _very_ specialized code, or networking software
      you don't really need to know what the kernel's doing
    > you might want control over when the data gets written, and there are
      system calls for that
** how does the data transfer actually work?
    > the kernel is going to manage the buffer as long as your program is
      active, it writes whenever the buffer full _or_ the program terminates
      but you can force it to write with the sync or fsync

* use of pointers and dereferencing
** leveraging a struct for program state can really help simplify