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Re: sysdeps/unix/sysv/linux/lseek.c on ILP32 question
On Tue, 2017-02-21 at 21:45 +0100, Andreas Schwab wrote:
> On Feb 21 2017, Steve Ellcey <sellcey@caviumnetworks.com> wrote:
>
> >
> > OK, I see if I change:
> >
> > val = lseek(fd, -(sizeof(crmsg) - 1), 1);
> >
> > to
> >
> > val = lseek(fd, -((off_t) sizeof(crmsg) - 1), 1);
> >
> > I get the result I want.
> >
> > But I am not entirely sure why, I guess it is a question of exactly
> > how
> > integer conversions are done.
> size_t is unsigned, and -size_t is still a positive value.
>
> Andreas.
OK, thanks for the help. This is a bug in the LTP (linux test project)
sources and I submitted an issue for it.
https://github.com/linux-test-project/ltp/issues/135
Steve Ellcey
sellcey@cavium.com