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From: Richard Stallman
Subject: uptime.el
Date: Wed, 19 Dec 2007 05:12:31 -0500

What do people think of this?  (The patch in startup.el should be done

Message-ID: <address@hidden>
Date: Tue, 18 Dec 2007 00:01:18 +0100
From: "Francesc Rocher" <address@hidden>
To: "Richard M. Stallman" <address@hidden>
Subject: uptime.el
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Please consider adding this little piece of elisp code into GNU Emacs:

;;; uptime.el --- tell how long Emacs has been up and running

;; Copyright (C) 2007 Free Software Foundation, Inc.

;; Author: Francesc Rocher <address@hidden>
;; Keywords: time, uptime.

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;; This file provides a couple of functions: `emacs-uptime' tells you how
;; long Emacs has been up and running. `emacs-startup-time' return a string
;; containing the date and time Emacs was started up.

;;; Code:

(require 'time-date)

(defun emacs-uptime (&optional here) "\
Tell how long GNU Emacs has been running.
If the optional argument HERE is non-nil, insert string at point."
  (interactive "P")
  (let* ((days (time-to-number-of-days (time-since emacs-startup-time)))
         (hours (* 24 (- days (truncate days))))
         (minutes (* 60 (- hours (truncate hours))))
         (seconds (* 60 (- minutes (truncate minutes))))
          (format "%s,  up %s"
                  (format-time-string "%x %T %Z" (current-time))
                  (format "%s%02d:%02d:%02d"
                          (if (> (truncate days) 0)
                              (format "%d days, " days) "")
                          hours minutes seconds))))
    (if here
        (insert uptime-string)
      (if (interactive-p)
          (message "%s" uptime-string)

(defun emacs-startup-time (&optional here format) "\
Return string containing the date and time Emacs was started up.
If the optional argument FORMAT is non-nil, it is used to format
the string. See `format-time-string' for valid formats.
If the optional argument HERE is non-nil, insert string at point."
  (interactive "P")
  (let ((time-string (format-time-string
                      (if (stringp format)
                        "%x %T %Z")
    (if here
        (insert time-string)
      (if (interactive-p)
          (message "%s" time-string)

(provide 'uptime)

;;; arch-tag:
;;; uptime.el ends here

Complemented with this constant definition:

diff -u startup.el.~1.470.~ startup.el
--- startup.el.~1.470.~ 2007-12-09 12:08:54.000000000 +0100
+++ startup.el  2007-12-17 23:18:01.000000000 +0100
@@ -2243,5 +2243,9 @@
       (setq file (replace-match "/" t t file)))

+ (defconst emacs-startup-time (current-time)
+   "Time at which GNU Emacs was started up."))
 ;; arch-tag: 7e294698-244d-4758-984b-4047f887a5db
 ;;; startup.el ends here

Best regards,
Francesc Rocher

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