fingerprint

type Fake struct {
	// Results are returned by successive Verify calls; nil past the end.
	Results []error
	// EnrolledN and EnrolledErr answer Enrolled.
	EnrolledN   int
	EnrolledErr error
	// Calls counts Verify calls; Ready counts onReady calls.
	Calls, Ready int
	// Block makes Verify wait for ctx; the result is then ErrTimeout when
	// the deadline passed, ctx.Err() otherwise.
	Block bool
	// NeverReady returns the result without calling onReady (a reader that
	// was never claimed: busy, unavailable).
	NeverReady bool
}

type Fprintd struct {
	// contains filtered or unexported fields
}

type Options struct {
	// Address overrides the system bus (tests). Empty: dbus.SystemBus.
	Address string
	// User is the account whose prints must match. Required.
	User string
	// OwnerUID is the uid the name owner must run as; -1 disables the check.
	OwnerUID int
}

type Verifier interface {
	// Verify blocks until a print enrolled for the console account matches,
	// ctx ends (ErrTimeout when its deadline passed, ctx.Err() otherwise),
	// or the reader fails (ErrNoMatch, ErrUnavailable, ErrBusy). onReady,
	// when not nil, runs once the reader is claimed: the caller prompts the
	// human then, never before, so that a finger is never offered to a
	// reader another process holds.
	Verify(ctx context.Context, onReady func()) error
	// Enrolled is the number of prints enrolled for the console account.
	Enrolled(ctx context.Context) (int, error)
}