-;;; battery.el --- display battery status information
+;;; battery.el --- display battery status information -*- coding: iso-8859-1 -*-
;; Copyright (C) 1997, 1998, 2000, 2001, 2002, 2003, 2004,
-;; 2005, 2006 Free Software Foundation, Inc.
+;; 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
;; Author: Ralph Schleicher <rs@nunatak.allgaeu.org>
;; Keywords: hardware
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; 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 2, or (at your option)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, 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.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
-;; There is at present support for GNU/Linux and OS X. This library
-;; supports both the `/proc/apm' file format of Linux version 1.3.58
-;; or newer and the `/proc/acpi/' directory structure of Linux 2.4.20
-;; and 2.6. Darwin (OS X) is supported by using the `pmset' program.
+;; There is at present support for GNU/Linux, OS X and Windows. This
+;; library supports both the `/proc/apm' file format of Linux version
+;; 1.3.58 or newer and the `/proc/acpi/' directory structure of Linux
+;; 2.4.20 and 2.6. Darwin (OS X) is supported by using the `pmset'
+;; program. Windows is supported by the GetSystemPowerStatus API call.
;;; Code:
((and (eq system-type 'gnu/linux)
(file-directory-p "/proc/acpi/battery"))
'battery-linux-proc-acpi)
+ ((and (eq system-type 'gnu/linux)
+ (file-directory-p "/sys/class/power_supply/")
+ (directory-files "/sys/class/power_supply/" nil "BAT[0-9]$"))
+ 'battery-linux-sysfs)
((and (eq system-type 'darwin)
- (condition-case nil
- (with-temp-buffer
+ (condition-case nil
+ (with-temp-buffer
(and (eq (call-process "pmset" nil t nil "-g" "ps") 0)
(> (buffer-size) 0)))
(error nil)))
- 'battery-pmset))
- "*Function for getting battery status information.
+ 'battery-pmset)
+ ((eq system-type 'windows-nt)
+ 'w32-battery-status))
+ "Function for getting battery status information.
The function has to return an alist of conversion definitions.
Its cons cells are of the form
:group 'battery)
(defcustom battery-echo-area-format
- (cond ((eq battery-status-function 'battery-linux-proc-apm)
- "Power %L, battery %B (%p%% load, remaining time %t)")
- ((eq battery-status-function 'battery-linux-proc-acpi)
+ (cond ((eq battery-status-function 'battery-linux-proc-acpi)
"Power %L, battery %B at %r (%p%% load, remaining time %t)")
+ ((eq battery-status-function 'battery-linux-sysfs)
+ "Power %L, battery %B (%p%% load)")
((eq battery-status-function 'battery-pmset)
- "%L power, battery %B (%p%% load, remaining time %t)"))
- "*Control string formatting the string to display in the echo area.
+ "%L power, battery %B (%p%% load, remaining time %t)")
+ (battery-status-function
+ "Power %L, battery %B (%p%% load, remaining time %t)"))
+ "Control string formatting the string to display in the echo area.
Ordinary characters in the control string are printed as-is, while
conversion specifications introduced by a `%' character in the control
string are substituted as defined by the current value of the variable
;;;###autoload (put 'battery-mode-line-string 'risky-local-variable t)
(defcustom battery-mode-line-format
- (cond ((eq battery-status-function 'battery-linux-proc-apm)
- "[%b%p%%]")
- ((eq battery-status-function 'battery-linux-proc-acpi)
+ (cond ((eq battery-status-function 'battery-linux-proc-acpi)
"[%b%p%%,%d°C]")
- ((eq battery-status-function 'battery-pmset)
+ (battery-status-function
"[%b%p%%]"))
- "*Control string formatting the string to display in the mode line.
+ "Control string formatting the string to display in the mode line.
Ordinary characters in the control string are printed as-is, while
conversion specifications introduced by a `%' character in the control
string are substituted as defined by the current value of the variable
:group 'battery)
(defcustom battery-update-interval 60
- "*Seconds after which the battery status will be updated."
+ "Seconds after which the battery status will be updated."
:type 'integer
:group 'battery)
(defcustom battery-load-low 25
- "*Upper bound of low battery load percentage.
+ "Upper bound of low battery load percentage.
A battery load percentage below this number is considered low."
:type 'integer
:group 'battery)
(defcustom battery-load-critical 10
- "*Upper bound of critical battery load percentage.
+ "Upper bound of critical battery load percentage.
A battery load percentage below this number is considered critical."
:type 'integer
:group 'battery)
(defun battery-linux-proc-acpi ()
"Get ACPI status information from Linux kernel.
-This function works only with the new `/proc/acpi/' format introduced
+This function works only with the `/proc/acpi/' format introduced
in Linux version 2.4.20 and 2.6.0.
The following %-sequences are provided:
60)))
hours (/ minutes 60)))
(list (cons ?c (or (and capacity (number-to-string capacity)) "N/A"))
- (cons ?L (or (when (file-exists-p "/proc/acpi/ac_adapter/AC/state")
- (with-temp-buffer
- (insert-file-contents
- "/proc/acpi/ac_adapter/AC/state")
- (when (re-search-forward "state: +\\(.*\\)$" nil t)
- (match-string 1))))
+ (cons ?L (or (battery-search-for-one-match-in-files
+ (mapcar (lambda (e) (concat e "/state"))
+ (ignore-errors
+ (directory-files "/proc/acpi/ac_adapter/"
+ t "\\`[^.]")))
+ "state: +\\(.*\\)$" 1)
+
"N/A"))
- (cons ?d (or (when (file-exists-p
- "/proc/acpi/thermal_zone/THRM/temperature")
- (with-temp-buffer
- (insert-file-contents
- "/proc/acpi/thermal_zone/THRM/temperature")
- (when (re-search-forward
- "temperature: +\\([0-9]+\\) C$" nil t)
- (match-string 1))))
- (when (file-exists-p
- "/proc/acpi/thermal_zone/THM/temperature")
- (with-temp-buffer
- (insert-file-contents
- "/proc/acpi/thermal_zone/THM/temperature")
- (when (re-search-forward
- "temperature: +\\([0-9]+\\) C$" nil t)
- (match-string 1))))
- (when (file-exists-p
- "/proc/acpi/thermal_zone/THM0/temperature")
- (with-temp-buffer
- (insert-file-contents
- "/proc/acpi/thermal_zone/THM0/temperature")
- (when (re-search-forward
- "temperature: +\\([0-9]+\\) C$" nil t)
- (match-string 1))))
- (when (file-exists-p
- "/proc/acpi/thermal_zone/THR2/temperature")
- (with-temp-buffer
- (insert-file-contents
- "/proc/acpi/thermal_zone/THR2/temperature")
- (when (re-search-forward
- "temperature: +\\([0-9]+\\) C$" nil t)
- (match-string 1))))
+ (cons ?d (or (battery-search-for-one-match-in-files
+ (mapcar (lambda (e) (concat e "/temperature"))
+ (ignore-errors
+ (directory-files "/proc/acpi/thermal_zone/"
+ t "\\`[^.]")))
+ "temperature: +\\([0-9]+\\) C$" 1)
+
"N/A"))
(cons ?r (or (and rate (concat (number-to-string rate) " "
rate-type)) "N/A"))
(format "%d:%02d" hours (- minutes (* 60 hours))))
"N/A"))
(cons ?p (or (and full-capacity capacity
+ (> full-capacity 0)
(number-to-string
(floor (/ capacity
(/ (float full-capacity) 100)))))
"N/A")))))
\f
+;;; `/sys/class/power_supply/BATN' interface for Linux.
+
+(defun battery-linux-sysfs ()
+ "Get ACPI status information from Linux kernel.
+This function works only with the new `/sys/class/power_supply/'
+format introduced in Linux version 2.4.25.
+
+The following %-sequences are provided:
+%c Current capacity (mAh or mWh)
+%B Battery status (verbose)
+%p Battery load percentage
+%L AC line status (verbose)"
+ (let (charging-state
+ (charge-full 0.0)
+ (charge-now 0.0)
+ (energy-full 0.0)
+ (energy-now 0.0))
+ ;; SysFS provides information about each battery present in the
+ ;; system in a separate subdirectory. We are going to merge the
+ ;; available information together.
+ (with-temp-buffer
+ (dolist (dir (ignore-errors
+ (directory-files
+ "/sys/class/power_supply/" t "BAT[0-9]$")))
+ (erase-buffer)
+ (ignore-errors (insert-file-contents
+ (expand-file-name "uevent" dir)))
+ (when (re-search-forward "POWER_SUPPLY_PRESENT=1$" nil t)
+ (goto-char (point-min))
+ (and (re-search-forward "POWER_SUPPLY_STATUS=\\(.*\\)$" nil t)
+ (member charging-state '("Unknown" "Full" nil))
+ (setq charging-state (match-string 1)))
+ (let (full-string now-string)
+ ;; Sysfs may list either charge (mAh) or energy (mWh).
+ ;; Keep track of both, and choose which to report later.
+ (cond ((and (re-search-forward
+ "POWER_SUPPLY_CHARGE_FULL=\\([0-9]*\\)$" nil t)
+ (setq full-string (match-string 1))
+ (re-search-forward
+ "POWER_SUPPLY_CHARGE_NOW=\\([0-9]*\\)$" nil t)
+ (setq now-string (match-string 1)))
+ (setq charge-full (+ charge-full
+ (string-to-number full-string))
+ charge-now (+ charge-now
+ (string-to-number now-string))))
+ ((and (re-search-forward
+ "POWER_SUPPLY_ENERGY_FULL=\\([0-9]*\\)$" nil t)
+ (setq full-string (match-string 1))
+ (re-search-forward
+ "POWER_SUPPLY_ENERGY_NOW=\\([0-9]*\\)$" nil t)
+ (setq now-string (match-string 1)))
+ (setq energy-full (+ energy-full
+ (string-to-number full-string))
+ energy-now (+ energy-now
+ (string-to-number now-string)))))))))
+ (list (cons ?c (cond ((or (> charge-full 0) (> charge-now 0))
+ (number-to-string charge-now))
+ ((or (> energy-full 0) (> energy-now 0))
+ (number-to-string energy-now))
+ (t "N/A")))
+ (cons ?B (or charging-state "N/A"))
+ (cons ?p (cond ((> charge-full 0)
+ (format "%.1f"
+ (/ (* 100 charge-now) charge-full)))
+ ((> energy-full 0)
+ (format "%.1f"
+ (/ (* 100 energy-now) energy-full)))
+ (t "N/A")))
+ (cons ?L (if (file-readable-p "/sys/class/power_supply/AC/online")
+ (if (battery-search-for-one-match-in-files
+ (list "/sys/class/power_supply/AC/online"
+ "/sys/class/power_supply/ACAD/online")
+ "1" 0)
+ "AC"
+ "BAT")
+ "N/A")))))
+
+
+\f
;;; `pmset' interface for Darwin (OS X).
(defun battery-pmset ()
(or (cdr (assoc char alist)) ""))))
format t t))
+(defun battery-search-for-one-match-in-files (files regexp match-num)
+ "Search REGEXP in the content of the files listed in FILES.
+If a match occurred, return the parenthesized expression numbered by
+MATCH-NUM in the match. Otherwise, return nil."
+ (with-temp-buffer
+ (catch 'found
+ (dolist (file files)
+ (and (ignore-errors (insert-file-contents file nil nil nil 'replace))
+ (re-search-forward regexp nil t)
+ (throw 'found (match-string match-num)))))))
+
\f
(provide 'battery)
HCoop / bpt / emacs.git / blobdiff