extern bool recvline(int fd, char *line, size_t len);
extern int check_port(char *name);
extern FILE *fopenmask(const char *filename, const char *mode, mode_t perms);
extern bool recvline(int fd, char *line, size_t len);
extern int check_port(char *name);
extern FILE *fopenmask(const char *filename, const char *mode, mode_t perms);