const STDIN_FILENO   = 0
const STDOUT_FILENO  = 1

const SIGABRT        = 6

const AT_FDCWD       = -100

const S_IFDIR        = 16384
const S_IFMT         = 61440

const PROT_READ      = 1
const PROT_WRITE     = 2

const MAP_PRIVATE    = 2
const MAP_ANONYMOUS  = 32

const O_RDONLY       = 0
const O_WRONLY       = 1
const O_CREAT        = 64
const O_TRUNC        = 512

const SEEK_SET       = 0
const SEEK_END       = 2

const F_OK           = 0

const CLOCK_REALTIME = 0