read(fd int, buffer *any, length int) -> int { return syscall(0, fd, buffer, length) } write(fd int, buffer *any, length int) -> int { return syscall(1, fd, buffer, length) } open(path *any, flags int, mode int) -> int { return syscall(2, path, flags, mode) } close(fd int) -> int { return syscall(3, fd) }