standards/142255: scandir prototype in dirent.h isn't compliant with POSIX 2008

[Kostik Belousov]

On Wed, Jan 06, 2010 at 06:55:47PM -0500, Garrett Wollman wrote:
> <<On Sun, 3 Jan 2010 15:00:11 GMT, Kostik Belousov <kostikbel at gmail.com> said:
> 
> >  The change of the prototype shall also fix alphasort(3). And then, each
> >  in-tree consumer should be updated.
>  
> >  scandir(3) is historical BSD interface, that only appeared in SUSv4.
> >  It seems that Solaris and possibly glibc are conforming, so FreeBSD
> >  should probably follow the route.
>  
> I believe someone at least complained about the Standard's broken
> prototypes, subsequent to the approval of the current standard,
> although I don't recall what the outcome was.
> 
> >  @@ -95,7 +95,7 @@ typedef	void *	DIR;
> >   __BEGIN_DECLS
> >   #if __BSD_VISIBLE
> >   DIR	*__opendir2(const char *, int);
> >  -int	 alphasort(const void *, const void *);
> >  +int	 alphasort(const struct dirent **, const struct dirent **);
> >   int	 getdents(int, char *, int);
> >   int	 getdirentries(int, char *, int, long *);
> >   #endif
> 
> If we're going to break the historical 4.4BSD prototype to match the
> broken one in SUSv4, the declaration should be moved to an appropriate
> section of the header file.  (I haven't checked -- is this interface
> in the base standard or the XSI option?  If the latter we should just
> ignore it -- we should not be trying to implement XSI's mistakes.)

See r201602.
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