Fortuned's Main Loop


     /* this is the main loop */
     while(1){
          FILE* pipe_in;
          char readbuf[1024];
          fd_set wset;
          /* first of all, open the device file for writing */
          fd = open(device_file, OPEN_FLAGS, OPEN_COMMON);
          log ("succesfully opened!");
          if (fd == -1){
               snprintf(errstring, sizeof(errstring), 
                        "failed to open the fifo. error '%s'", strerror(errno));
               goto cleanup;
          }

          /* first of all, make sure we handle SIGPIPE gracefully */
          signal(SIGPIPE, sigpipehandler);
          
          /* we open a pipe with the fortune binary */
          if ((pipe_in = popen(FORTUNE_BINARY, "r")) == NULL){
               snprintf(errstring, sizeof(errstring), 
                        "could not popen(%s)", FORTUNE_BINARY);
               goto cleanup;
          }