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_NONE  = 0
const PROT_READ  = 1
const PROT_WRITE = 2
const PROT_EXEC  = 4

const MAP_FAILED          = -1
const MAP_SHARED          = 1
const MAP_PRIVATE         = 2
const MAP_FIXED           = 16
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