// chance the file doesn't exist yet - keeps the number of tries in
// TempFile to a minimum.
//
//go:linkname runtime_rand runtime.rand
func runtime_rand() uint64

func nextRandom() string {
	return itoa.Uitoa(uint(uint32(runtime_rand())))
}

// CreateTemp creates a new temporary file in the directory dir,
// opens the file for reading and writing, and returns the resulting file.