Re: [Groff] still exploring the last version: what is gremlin ?

[Larry Jones]

Daniel Senderowicz writes (quoting me):
> 
> >Actually, assuming that readmask is a mask for select, it should
> >probably be more like:
> >
> >     FD_ZERO(&readmask);
> >     FD_SET(ConnectionNumber(display), &readmask);
> 
> This couple of lines give the following error message:
> 
> main.c:595: request for member `fds_bits' in something not a structure or 
> union
> *** Error code 1

Which means that readmask isn't declared correctly -- it's probably
declared as an unsigned int or an unsigned long (or an array of them),
rather than being declared as an fd_set.  The original definition of
select used primitive types, but it quickly became apparent that that
created all kinds of portability problems so the fd_set type and the
FD_* macros were added to encapsulate all of the messy stuff. 
Unfortunately, a lot of programmers never bothered to learn to use them.

-Larry Jones

Things are never quite as scary when you've got a best friend. -- Calvin