ref: b9d66bc012e6a431a75bf4d9a138cf6c2a8eb6f6
dir: /include/err.h/
#pragma once enum { OK = 0, /* you don't want these mass up with your values */ PERM_DENIED = -128, NAME_TOO_LONG, NO_FILE, FS_NOT_READY, DIR_NOT_EMPTY , NO_MEM, LL_ERR, NO_SUCH_CMD, }err;