bug#22300: 25.1.50; Dired -- renaming folders/files to CamelCase/UPPERCASE/lowercase.

[Eli Zaretskii]

> From: John Wiegley <jwiegley@gmail.com>
> Cc: drew.adams@oracle.com,  22300@debbugs.gnu.org,  esq@lawlist.com
> Date: Mon, 04 Jan 2016 11:48:57 -0800
> 
> >>>>> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Is there a C-callable API that could establish which one is it? Something
> > like the Posix 'pathconf', perhaps, with some magic _PC_something argument?
> 
> It looks like getattrlist(2) is what you need:
> 
> https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man2/getattrlist.2.html
> 
> Specifically, the volume attribute VOL_CAP_FMT_CASE_SENSITIVE.

Thanks.  Patches are welcome to use this in rename-file.  I would
suggest a Darwin-specific version of string-equal that would compare
case-insensitively or case-sensitively as the volume requires that.
Then we could call that function from rename-file, like we do with
string-equal in the DOS_NT part there.