ref: 5bb11ec674b1d8ea7693a5f9120280f1102c5796
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,
USAGE,
}err;