Re: size_t changes and 32/64-bit, kernel uio_resid type changed.

[Garance A Drosihn <drosih@xxxxxxx>]

At 9:49 PM -0700 8/18/09, Matthew Dillon wrote:
>     size_t has been changed to unsigned long (and ssize_t to long).  I may
>     revert this prior to the release if we hit pkgsrc problems.  The change
>     will be kept for 64-bit machines.
>
>     The change on 32 bit machines seems to do a pretty good job generating
>     compiler warnings on 32-bit machines for code that will break on
>     64-bit machines.  Because of this I think it is worth seeing how badly
>     pkgsrc breaks with the change.  If it breaks too much we will revert
>     it on 32 bit machines.

Isn't this explicitly wrong?  Isn't ssize_t defined as holding all
valid values of size_t, *plus* some extra values which can be used
for error indications?

To quote SUSv3:

   "The type ssize_t shall be capable of storing values at least
    in the range [-1, {SSIZE_MAX}]"

So are you defining SSIZE_MAX to be smaller than maximum-long?

--
Garance Alistair Drosehn            =   gad@gilead.netel.rpi.edu
Senior Systems Programmer           or  gad@freebsd.org
Rensselaer Polytechnic Institute    or  drosih@rpi.edu