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Re: Noob dumb question (extending emacs)
From: |
Jean Louis |
Subject: |
Re: Noob dumb question (extending emacs) |
Date: |
Mon, 25 Oct 2021 23:00:26 +0300 |
User-agent: |
Mutt/2.0.7+183 (3d24855) (2021-05-28) |
* Emanuel Berg via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org> [2021-10-25 22:48]:
> Jean Louis wrote:
>
> > (defun rcd-read-urandom (&optional length)
> > "I am also free to modify the Emacs Lisp unlimited times."
> > (shell-command-to-string "head -n 1 /dev/urandom"))
>
> So you had one as well ...
>
> Check how head does it then ... that's how to get aHEAD in
> software piracy ...
>
> (defun urandom (bits)
> (interactive "nbits: ")
> (let*((bytes (/ bits 8))
> (bytes-opt (format "--bytes=%s" bytes)) )
> (with-temp-buffer
> (set-buffer-multibyte nil)
> (call-process "head" "/dev/urandom" t nil bytes-opt)
> (string-to-list
> (buffer-substring-no-properties (point-min) (point-max)) ))))
> ;; (urandom 100)
Really great, though complicated.
I expect in future to run only GNU Emacs on computer, so external
commands I wish to eradicate.
I think that description of nano, micro and milliseconds from
`format-time-string' plus Emcas uptime, create enough randomity for my
needs.
%N is the nanosecond, %6N the microsecond, %3N the millisecond, etc.
(md5 (concat (emacs-uptime) (format-time-string "%N %6N %3N"))) ⇒
"ed542b20ba78029ceda9a3a3824e7154"
With or without md5 is enough random.
Can anybody predict my Emacs uptime concatenated with the current
nanoseconds, microseconds and milliseconds?
--
Jean
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- Re: Noob dumb question (extending emacs), (continued)
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/24
- Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/25
- Re: Noob dumb question (extending emacs), Yuri Khan, 2021/10/25
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/25
- Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/25
- Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/25
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/25
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/25
- About randomity, entropy, random passwords - was Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/25
- Re: About randomity, entropy, random passwords - was Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/25
- Re: Noob dumb question (extending emacs),
Jean Louis <=
- Re: Noob dumb question (extending emacs), Yuri Khan, 2021/10/25
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/25
- Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/25
- About randomity, entropy, random passwords - was Re: Noob dumb question (extending emacs), Jean Louis, 2021/10/25
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/28
- Re: Noob dumb question (extending emacs), Michael Heerdegen, 2021/10/23
- Re: Noob dumb question (extending emacs), Yuri Khan, 2021/10/23
- Re: Noob dumb question (extending emacs), Michael Heerdegen, 2021/10/23
- Re: Noob dumb question (extending emacs), Emanuel Berg, 2021/10/23
- Re: Noob dumb question (extending emacs), Michael Heerdegen, 2021/10/24