[LTP] [PATCH] tst_res: Print errno number in addition to error name

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
> >> > > It appears we are atleast missing ENOTSUPP (524) which is probably returned by
> >> > > create_timer for some alarm clocks on none x86 arches. This isn't entirely
> >> > > clear, but what is clear is that it would help to know what the error number
> >> > > is without using strace.
> >> >
> >> > Can we please also patch the lib/errnos.h so that the ENOTSUPP is
> >> > included there as well?
> >>
> >> Not sure if we should do that since it(from google) says ENOTSUPP is
> >> not intended to used in userland.
> 
> I suppose we could print a warning/fail if any error value over 512
> (ERESTARTSYS) is seen by tst_res(). We can define these error numbers in
> user land for debugging purposes.

Sounds good to me, I wouldn't do it a fail, even simple TINFO message
that would say that we got unexpected errno.

And we should btw do that for the tst_strerrno() as well.

> > Looks like there are two of these ENOTSUP and ENOTSUPP so the syscall
> > returning ENOTSUPP is a bug itself since it should return ENOTSUP. Also
> > btw ENOTSUP == EOPNOTSUPP and we do have EOPNOTSUPP in errnos.h.
> 
> I think there is quite a lot of stuff missing. Maybe it is time to
> create a script for generating this list?

We can but I would just commit the resulting header to LTP since the
list will not change frequently or at all.

-- 
Cyril Hrubis
chrubis@suse.cz