From: David Kastrup <dak@gnu.org>
Date: Thu, 23 Aug 2007 08:08:18 GMT
Subject: Re: confused about preserved permissions
Message-ID: <86fy2abrm5.fsf@lola.quinscape.zz>
In-Reply-To: <7vfy2avg2b.fsf@gitster.siamese.dyndns.org>

Junio C Hamano <gitster@pobox.com> writes:

> Benoit SIGOURE <tsuna@lrde.epita.fr> writes:
>
>> Let's look at the problem from another point of view then: I want my
>> *working tree* to be group readable even though my umask is 066.
>
> I have to wonder if there is any sane development tool that
> supports that kind of thing.  E.g. vi, emacs, gcc,...?  If you
> allowed a tool to do that, what's the point of having a umask?

Hm?  Are we talking about the same Emacs here?  The thing that has a
directory editor built into it with which one can do chmod and so on?

Here are a few functions:

    executable-make-buffer-file-executable-if-script-p is an autoloaded Lisp function in `executable'.
    (executable-make-buffer-file-executable-if-script-p)

    Make file executable according to umask if not already executable.
    If file already has any execute bits set at all, do not change existing
    file modes.


----------------
dired-do-chmod
  Command: Change the mode of the marked (or next ARG) files.
This calls chmod, thus symbolic modes like `g+w' are allowed.

(fn &optional ARG)

----------------
executable-set-magic
  Command: Set this buffer's interpreter to INTERPRETER with optional ARGUMENT.
The variables `executable-magicless-file-regexp', `executable-prefix',
`executable-insert', `executable-query' and `executable-chmod' control
when and how magic numbers are inserted or replaced and scripts made
executable.

(fn INTERPRETER &optional ARGUMENT NO-QUERY-FLAG INSERT-FLAG)



However, Emacs does not provide a hook into the system call as far as
I can see: it calls chmod explicitly.


-- 
David Kastrup