Re: How to show system messages

[Paul Davis <pbd Op Net>]

>> 2) Use 'tail -f filename' and it will constantly
>>    update whenever something is added.
>
>if you forked 'tail -f filename', you could monitor any new output with
>something like:
>
>outiomontag=gdk_input_add(stdout_pipe[0],GDK_INPUT_READ,
>                            (GdkInputFunction)dispout,NULL);
>

pretty pointless. tail -f just runs something like this:

       while (1) {
           now = get_current_time ();
           if (modification_time (file) > last_time) {
	        show_recent_data (file);
           }
	   last_time = now;
           sleep (1);
       }

wrap this up as a timeout function (rough pseudo-code):

      gint 
      check_file () 
      {
           struct stat statbuf;
           now = get_current_time ();
	   fstat (fd, &statbuf);
	   if (statbuf.st_mtime > last_time) {
	        show_recent_data (fd);
           }
	   last_time = now;
	   return TRUE;
      }		   		

and add with gtk_timeout_add (...)

--p