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bug#22795: 25.0.91; Can't write read only file on w32

From: Ota, Takaaki
Subject: bug#22795: 25.0.91; Can't write read only file on w32
Date: Thu, 25 Feb 2016 10:15:40 -0800

Thu, 25 Feb 2016 20:09:34 +0200: Eli Zaretskii <address@hidden> wrote:

> > Date: Thu, 25 Feb 2016 09:08:38 -0800
> > CC: <address@hidden>
> > From: "Ota, Takaaki" <address@hidden>
> > 
> > Yes, I own and have full permission of the directory.  I noticed one
> > thing when I tried other than C: drive.  An external USB drive with
> > NTFS file system exhibits the same problem as C: drive.  A flash drive
> > with FAT32 doesn't show the same problem.  Have you tried with NTFS?
> I tried only with NTFS.
> > I tried "emacs -Q" (actually "./runemacs -Q") and the result is the
> > same.  On FAT32 the writing succeeds.  On NTFS the writing fails by
> > Permission denied error.
> Very strange.  I guess the only way forward is for you to step with
> Edebug through save-buffer and its subroutines in files.el, and tell
> what fails there and why.  Can you do that?  (Since this works on
> FAT32, I suspect some issue with NT security, although 24.5 also used
> ACLs...)
> Thanks.

I will try.


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