listen(sd1, 5);
printf("Listening on port 2346...\n");

      if((pid = fork()) == 0) {
        if((execl("program", "program", "-client", "127.0.0.1:2346", 0)) < 0) {
              printf("Error launching program");
              exit(0);
        }
      }

    sda = accept(sd1, (struct sockaddr *) &localgr, (&clilen));
              if(sda < 0) {
                  printf("There was an error connecting to the client.\n");
                  return 1;
              }
              else {
                  printf("Connection with the client has been established!\n");
                  printf("Connecting to the server...\n");
                  close(sd1);
              }

ETC...