bug#10021: [PATCH id] Add error-checking on GNU

[Eric Blake]

On 11/15/2011 10:09 AM, Eric Blake wrote:
> Still debatable.  POSIX explicitly states that the condition of errno
> after a successful call to a standardized function is unspecified; that
> is, a successful geteuid() may pollute errno, but it's okay, because the
> user shouldn't be inspecting errno after geteuid().
> 
> It might be worth proposing a change to POSIX to require that geteuid()
> and friends leave errno unchanged on success (in order to allow for the
> GNU extension of setting errno on failure, even though POSIX did not
> reserve a specific value for failure); I'll pursue that course.

Done: http://austingroupbugs.net/view.php?id=511

-- 
Eric Blake   address@hidden    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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