On the client, the connect() system call establishes a connection to the server.

int connect(int sockfd, struct sockaddr *serv_addr, int addrlen);

■	The first parameter is the socket descriptor from the socket() call, sockfd.
■	The second parameter is the server’s sockaddr address, to be filled in.
■	The third parameter is the length of the server’s sockaddr structure.

This is similar to the accept() system call, except that the client does not have to bind a local address to the socket descriptor before calling connect(). The server address pointed to by srv_addr must exist.

For example:

#define SERV_PORT 5432
     unsigned long inet_addr(char *ptr);
     bzero((char *) &serv_addr, sizeof(serv_addr));
     serv_addr.sin_family = AF_INET;
     serv_addr.sin_port = htons(SERV_PORT):
     serv_addr.sin_addr.s_addr = inet_addr(SERV_HOST_ADDR);
     connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));