extern bool sendline(int fd, const char *format, ...) ATTR_FORMAT(printf, 2, 3);
extern bool recvline(int fd, char *line, size_t len);
extern int check_port(const char *name);
extern bool sendline(int fd, const char *format, ...) ATTR_FORMAT(printf, 2, 3);
extern bool recvline(int fd, char *line, size_t len);
extern int check_port(const char *name);