Function validDeviceMode

cli/command/container/opts.go:1056–1072

validDeviceMode checks if the mode for device is valid or not. Valid mode is a composition of r (read), w (write), and m (mknod).

(mode string)

// validDeviceMode checks if the mode for device is valid or not.
// Valid mode is a composition of r (read), w (write), and m (mknod).
func validDeviceMode(mode string) bool {
	legalDeviceMode := map[rune]bool{
		'r': true,
		'w': true,
		'm': true,
	}
	if mode == "" {
		return false
	}
	for _, c := range mode {
		if !legalDeviceMode[c] {
			return false
		}
		legalDeviceMode[c] = false
	}
	return true
}

// validateDevice validates a path for devices
func validateDevice(val string, serverOS string) (string, error) {