int init_unix_addr(struct sockaddr_un *, const char *);
int recv_cred_buffer(int, char *, size_t);
ssize_t send_cred_buffer(int, char*);
int recv_pattern(int fd, const char *pattern, size_t bufsize);
int init_tcp_socket(int port);
int init_unix_addr(struct sockaddr_un *, const char *);
int recv_cred_buffer(int, char *, size_t);
ssize_t send_cred_buffer(int, char*);
int recv_pattern(int fd, const char *pattern, size_t bufsize);
int init_tcp_socket(int port);