From: Jani Nikula <jani@nikula.org>
To: Felipe Contreras <felipe.contreras@gmail.com>
Subject: Re: [PATCH v2 1/3] Add 'compose' command
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User-Agent: Notmuch/0.11.1+222~ga47a98c (http://notmuchmail.org) Emacs/23.1.1
	(i686-pc-linux-gnu)
Date: Wed, 18 Apr 2012 14:20:16 +0000
Message-ID: <87vckxazq7.fsf@nikula.org>
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Cc: Felipe Contreras <felipe.contreras@ngmail.com>, notmuch@notmuchmail.org
Precedence: list

On Wed, 18 Apr 2012 16:34:30 +0300, Felipe Contreras <felipe.contreras@gmail.com> wrote:
> On Wed, Apr 18, 2012 at 4:06 PM, Jani Nikula <jani@nikula.org> wrote:
> 
> > Running "notmuch compose" more than once within a second would result in
> > identical message ids for the messages, which is not a good idea. That's
> > not likely in interactive use, but the notmuch cli is highly scriptable,
> > so someone is bound to hit this.
> >
> > Some paranoid might also be worried about "leaking" the time you run
> > "notmuch compose"... which may be different from the actual time you
> > send the message.
> 
> It's still better than the current situation; nothing. In any case,
> people that have not needed this would not be affected; their UI would
> override the Message-ID.
> 
> So do you have a better suggestion for a Message-ID?

The easy way would be to just use g_mime_utils_generate_message_id()
[1]. It doesn't give you any control of the part before @, but I'm not
sure if that really matters.

Alternatively you can write your own according to e.g. [2]. Glib appears
to have decent and portable support for pseudo random number
generation. But why bother? I'd go with gmime.

BR,
Jani.


[1] http://developer.gnome.org/gmime/stable/gmime-gmime-utils.html#g-mime-utils-generate-message-id
[2] http://www.jwz.org/doc/mid.html