Re: [RFA/libiberty] Darwin has case-insensitive filesystems

[Corinna Vinschen <vinschen@redhat.com>]

On Jun 14 18:01, DJ Delorie wrote:
> 
> > This is wrong as not all FSs are case insensitive.  In fact HFS+ can
> > be case sensitive too.  I think you need better check than just
> > saying all Darwin is case insensitive.  This is just like using
> > FAT32 on Linux.  In fact I think HAVE_DOS_BASED_FILE_SYSTEM is
> > incorrect also for NTFS as it can also be case sensitive.
> 
> There's a difference between case preserving and case sensitive,
> though, and we really don't have a portable way to detect
> case-sensitivity on a per-directory basis, sow how can we do better?

As Andrew points out, NTFS can be case-sensitive as well, and on Windows
the case-sensitivity vs. case-preserving behaviour can be chosen for
each file or directory descriptor at the time the file is opened.

IMHO it's actually a pity that the filename comparison behaves differently
on different systems.  I think it would make sense to behave identical on
all systems.  What about this:  Always search case-sensitive.  If file has
been found, return.  Otherwise, search case-insensitive.

Talking about case-insensitive comparison, the filename_cmp and
filename_ncmp functions don't work for multibyte codesets, only for
singlebyte codesets.  Given that UTF-8 is standard nowadays, shouldn't
these functions be replaced with multibyte-aware versions?  Along the
same lines, the entire set of safe-ctype functions only work for ASCII
and EBCDIC...


Corinna

-- 
Corinna Vinschen
Cygwin Project Co-Leader
Red Hat