SYS_EXIT    = 1
SYS_READ    = 3
SYS_WRITE   = 4
SYS_OPEN    = 5
SYS_CLOSE   = 6
SYS_LSEEK   = 19

SEEK_SET    = 0
SEEK_CUR    = 1
SEEK_END    = 2

O_RDONLY    = 0
O_LARGEFILE = 0x8000

STDIN       = 0
STDOUT      = 1
STDERR      = 2