int ask_password_tty(const char *message, usec_t until, const char *flag_file, char **_passphrase);
void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);
int ask_password_tty(const char *message, usec_t until, const char *flag_file, char **_passphrase);
void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);