Re: autoconf test for deprecated readdir_r

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On Qui, 2016-06-30 at 17:42 +0200, Florian Weimer wrote:
> On 06/30/2016 05:38 PM, Zdenek Kabelac wrote:
> 
> > 
> > Cut & paste example code solution from lvm2:
> > 
> > #if !defined(__GLIBC__) || (__GLIBC__ < 2) || ((__GLIBC__ == 2) &&
> > (__GLIBC_MINOR__ < 23))
> >     /* readdir_r is deprecated with newer GLIBC */
> >     struct dirent entry, *iter = 0;
> >     while ( (errno = readdir_r( d.d, &entry, &iter )) == 0 && iter
> > ) {
> >         std::string ename( entry.d_name );
> > #else
> >     struct dirent *entry;
> >     errno = 0;
> >     while ( (entry = readdir( d.d )) ) {
> >         std::string ename( entry->d_name );
> > #endif
> Why not use readdir unconditionally?
> 
> The point of the deprecation was that readdir is much more portable
> than 
> readir_r.  Stack allocation of struct dirent is not supported; the
> above 
> has a buffer overflow in the d_name field on many systems.

I agree readdir_r should be replace with readdir

I made this patch : https://www.virtualbox.org/attachment/ticket/15205/
VirtualBox-5.0.16-glibc.patch 

can someone confirm that is correct ? 

> Florian
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-- 
Sérgio M. B.

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