From: Ken Raeburn <raeburn@raeburn.org>
To: Emacs Dev <emacs-devel@gnu.org>
Subject: Re: Should Emacs provide a uuid function?
Date: Mon, 25 Apr 2011 03:21:23 -0400 [thread overview]
Message-ID: <42A7030B-DE0C-4CCA-A768-B82BE70C42F9@raeburn.org> (raw)
In-Reply-To: <871v0raqub.fsf@uwakimon.sk.tsukuba.ac.jp>
On Apr 25, 2011, at 00:37, Stephen J. Turnbull wrote:
> I have to agree with Yidong; there's no good reason not to inline
>
> (shell-command-to-string "uuidgen")
>
> in any of the applications you've mentioned if you want an
> uuidgen-format UUID.
How widespread is the uuidgen program these days? Several systems I just checked have it, but it's not a program I'd been aware of. Though, at least one version I ran across generates (by default?) the information-revealing "version 1" format that encodes the machine's MAC address, and while some versions have options to control which form is generated, not all do.
Using the version-4 random-number-based form described in wikipedia, it would probably be faster to just suck in 16 bytes from /dev/urandom or other good pseudo-random number source (which is a different portability question) and format the string directly. I wouldn't consider the elisp 'random' function to be remotely good enough though.
Ken
next prev parent reply other threads:[~2011-04-25 7:21 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-15 4:59 Should Emacs provide a uuid function? Leo
2011-04-24 20:43 ` Chong Yidong
2011-04-25 3:37 ` Leo
2011-04-25 4:37 ` Stephen J. Turnbull
2011-04-25 7:21 ` Ken Raeburn [this message]
2011-04-25 8:45 ` Stephen J. Turnbull
2011-04-25 9:53 ` Eli Zaretskii
2011-04-25 10:33 ` Stephen J. Turnbull
2011-04-25 12:30 ` Eli Zaretskii
2011-04-28 15:11 ` Ken Raeburn
2011-04-29 3:47 ` Stephen J. Turnbull
2011-04-30 8:00 ` Ken Raeburn
2011-04-30 18:39 ` Stephen J. Turnbull
2011-04-30 22:22 ` Ken Raeburn
2011-05-01 9:06 ` Stephen J. Turnbull
2011-04-30 13:32 ` Richard Stallman
2011-04-30 13:39 ` Eli Zaretskii
2011-04-25 19:52 ` Chong Yidong
2011-04-28 15:11 ` Ken Raeburn
2011-05-09 6:29 ` Leo
2011-05-09 7:23 ` Eli Zaretskii
2011-05-09 10:51 ` Ted Zlatanov
2011-05-09 11:35 ` Eli Zaretskii
2011-05-09 11:36 ` Leo
2011-05-09 14:38 ` Stefan Monnier
2011-05-09 14:51 ` Eli Zaretskii
2011-05-09 15:41 ` Stefan Monnier
2011-05-09 15:50 ` Eli Zaretskii
2011-05-09 17:03 ` Stefan Monnier
2011-05-09 19:32 ` Eli Zaretskii
2011-05-09 15:09 ` Chong Yidong
2011-05-09 15:26 ` Eli Zaretskii
2011-05-09 15:27 ` Ted Zlatanov
2011-05-09 15:36 ` Eli Zaretskii
2011-05-09 15:42 ` Ted Zlatanov
2011-05-09 15:53 ` Lars Magne Ingebrigtsen
2011-05-09 15:51 ` Stefan Monnier
2011-05-09 15:59 ` Lars Magne Ingebrigtsen
2011-05-09 17:05 ` Stefan Monnier
2011-05-09 17:45 ` joakim
2011-05-09 17:50 ` Lars Magne Ingebrigtsen
2011-05-10 14:03 ` Jason Rumney
2011-05-30 17:22 ` Lars Magne Ingebrigtsen
-- strict thread matches above, loose matches on Subject: below --
2011-04-26 21:06 Ben Key
2011-04-26 21:16 Ben Key
2011-04-26 22:51 ` Chong Yidong
2011-04-27 3:43 ` Leo
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