main(int argc, char *argv[]) {
int s = MakeServerSocket(7654);
while (1) {
      struct sockaddr_in sa;
      int sa_len = sizeof(sa);
      int fd = accept(s, (struct sockaddr *) &sa, (unsigned int *)&sa_len);
      errorCheck(fd,"No connection");
      int pid = fork();
      errorCheck(pid, "Forking error");           //error if pid == -1
      if (pid == 0) {                                        //child process
           close(s);                                           //close original listening socket
           chat(fd);                                           //read/write from client
           close(fd);                                          //close socket
           exit(1);
          }
      if (pid > 0) {
            int x; 
            waitpid(-1,&x,WNOHANG);               //waits 'till child has exited
            close(fd);                                         //closes parent
          }

}