MAX_FIDO_DEVICES
if ((devlist = fido_dev_info_new(MAX_FIDO_DEVICES)) == NULL) {
if ((r = fido_dev_info_manifest(devlist, MAX_FIDO_DEVICES,
fido_dev_info_free(&devlist, MAX_FIDO_DEVICES);
fido_dev_info_free(&devlist, MAX_FIDO_DEVICES);