Re: sqlite3

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> If Emacs 1 attempts to open and read the file while Emacs 2 still
> writes to it, Windows will not let Emacs 1 open the file, and the
> failure will be EACCES, as your report shows.  That's because the
> default way of opening files which we use in Emacs opens them in
> "unshared" mode, so they cannot be shared between different processes.

But in this case, Emacs 2 should have exited already before we try to
read the file...  I think.  I'll try to debug this more thoroughly;
perhaps I was misinterpreting what I was seeing.

> Which probably means multisession.el should have some mechanism to
> deal with this gracefully, like retrying the open/read several times
> before giving up.  After all, the window for such races should be
> quite short, given that we write very small files.

Yup.  It does this in the sqlite case, so I'll replicate the logic in
the files case, too.  But it seemed very mysterious to me that I was
getting a permission denied after Emacs 2 had exited.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no