On Thu, Aug 16, 2001 at 04:17:48PM -0400, Calin Culianu wrote:
> Notice that unlike the rtf_put() function in rt-linux, the read() system
> call actually was well enough written to work with void *. It escapes me
> why the rt-linux developers chose char * as opposed to void * for their
> second argument to rtf_put(). All I have seen it to do to date was
> confuse novices. Can anyone enlighten me on this fine point?
Yes. The answer is "lack of thought" - rtf_put was quite early and the early
UNIX "read" was prior to the invention of "void *" so we didn't think about
it.
Note that RTLinux now has a POSIX interface to RTF and you can do
fd = open("/dev/rft2",O_WRONLY | O_NBLK );
write(fd, voidpointer, n);
To make things nicely symmetrical.
>
> -Calin
>
> >
> > mbuff looks interesting but I have found the doc to be sparse.
> >
> > I am sure that many of you have had to do this, so I would like to hear your
> > opinions. Code snippets would be appreciated to help me along.
> >
> > Thank-you!
> >
> > Oliver
> > National Test Pilot School
> >
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