//go:nosplit
func write1(fd uintptr, buf unsafe.Pointer, nbyte int32) int32 {
	r1, err := sysvicall3Err(&libc_write, fd, uintptr(buf), uintptr(nbyte))
	if c := int32(r1); c >= 0 {
		return c
	}
	return -int32(err)
}

//go:nosplit
func pipe2(flags int32) (r, w int32, errno int32) {
	var p [2]int32
	_, e := sysvicall2Err(&libc_pipe2, uintptr(noescape(unsafe.Pointer(&p))), uintptr(flags))
	return p[0], p[1], int32(e)
}