For sure. The chorus of "Clearly you should be writing your own buffering" has been bugging me - it's not hard but there's a lot of room for an error and you're doing a lot of obfuscating of the code actually solving your problem reimplementing infrastructure that already exists in libc... If you're consuming a single character at a time from a single thread, I don't think you're likely to beat getc_unlocked by much anyway.
