Re: 64-bit time_t and __WORDSIZE_TIME64_COMPAT32

[Thorsten Kukuk <kukuk@suse.com>]

On Tue, Feb 14, Florian Weimer wrote:

> * Thorsten Kukuk via Libc-alpha:

> > So the main consumer of utmp is glibc itself: getlogin()/getlogin_r()
> > Is there any idea how to replace that, if utmp/wtmp gets deprecated?
> 
> We use /proc/self/loginuid already, and try to resolve that UID using
> NSS.  We still have fallback to __getutline_r.  I think it would be
> really helpful if you could discover why that fallback is used.  I would
> have thought it's dead code.
> 
> Is it because /proc/self/loginuid is missing, or because NSS fails for
> some reason?  If it's about /proc/self/loginuid, maybe we can look at
> the owner of /dev/tty instead.

I made an half-automatic analysis of the binaries and corresponding
source code and it seems I looked at the wrong sysdeps file in the glibc
sources :( I didn't checked at runtime as I never know if I hit the
correct execution path or not.
Sorry, with the current glibc implementation we should be fine, so I
will create bug reports against the projects who implemented their own
getlogin() function based on utmp.

Thanks, I will fix my document.

  Thorsten

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Thorsten Kukuk, Distinguished Engineer, Senior Architect, Future Technologies
SUSE Software Solutions Germany GmbH, Frankenstraße 146, 90461 Nuernberg, Germany
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