Re: [RFC] Add pthread_detach_pwd call.

[Florian Weimer <fweimer at redhat dot com>]

On 10/21/2013 02:04 PM, Joseph S. Myers wrote:
> On Mon, 21 Oct 2013, Florian Weimer wrote:
>
> > On 10/21/2013 12:25 AM, Rich Felker wrote:
> >
> > > There is already a clean, portable way to achieve the exact same
> > > thing: the *at functions.
> >
> > fsetxattrat is missing, though.  Probably more.
>
> Feel free to propose/implement new *at functions for glibc.  That doesn't
> depend on kernel support (although kernel support would be good) because
> you can implement them in userspace using /proc/self/fd, just like many
> existing fallback implementations for !__ASSUME_ATFCTS.

Interesting.  Is constructing such names

      static const char procfd[] = "/proc/self/fd/%d/%s";

race-free?  I'm asking because the /proc/self/fd entries are presented 
as symbolic links.

--
Florian Weimer / Red Hat Product Security Team