;;; battery.el --- display battery status information
-;; Copyright (C) 1997, 1998, 2000, 2001 Free Software Foundation, Inc.
+;; Copyright (C) 1997, 1998, 2000, 2001, 2003 Free Software Foundation, Inc.
;; Author: Ralph Schleicher <rs@nunatak.allgaeu.org>
;; Keywords: hardware
;;; Commentary:
-;; There is at present only a function interpreting the new `/proc/apm'
-;; file format of Linux version 1.3.58 or newer. That is, what a lucky
-;; coincidence, exactly the interface provided by the author's laptop.
+;; There is at present support for interpreting the new `/proc/apm'
+;; file format of Linux version 1.3.58 or newer and for the `/proc/acpi/'
+;; directory structure of Linux 2.4.20 and 2.6.
;;; Code:
(defcustom battery-status-function
(cond ((and (eq system-type 'gnu/linux)
(file-readable-p "/proc/apm"))
- 'battery-linux-proc-apm))
+ 'battery-linux-proc-apm)
+ ((and (eq system-type 'gnu/linux)
+ (file-directory-p "/proc/acpi/battery"))
+ 'battery-linux-proc-acpi))
"*Function for getting battery status information.
The function has to return an alist of conversion definitions.
Its cons cells are of the form
(defcustom battery-echo-area-format
(cond ((eq battery-status-function 'battery-linux-proc-apm)
- "Power %L, battery %B (%p%% load, remaining time %t)"))
+ "Power %L, battery %B (%p%% load, remaining time %t)")
+ ((eq battery-status-function 'battery-linux-proc-acpi)
+ "Power %L, battery %B at %r mA (%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
(defcustom battery-mode-line-format
(cond ((eq battery-status-function 'battery-linux-proc-apm)
- " [%b%p%%]"))
+ " [%b%p%%]")
+ ((eq battery-status-function 'battery-linux-proc-acpi)
+ " [%b%p%%,%d°C]"))
"*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
(cons ?t (or remaining-time "N/A")))))
\f
+;;; `/proc/acpi/' interface for Linux.
+
+(defun battery-linux-proc-acpi ()
+ "Get ACPI status information from Linux kernel.
+This function works only with the new `/proc/acpi/' format introduced
+in Linux version 2.4.20 and 2.6.0.
+
+The following %-sequences are provided:
+%c Current capacity (mAh)
+%B Battery status (verbose)
+%b Battery status, empty means high, `-' means low,
+ `!' means critical, and `+' means charging
+%d Temperature (in degrees Celsius)
+%L AC line status (verbose)
+%p battery load percentage
+%m Remaining time in minutes
+%h Remaining time in hours
+%t Remaining time in the form `h:min'"
+ (let (capacity design-capacity rate charging-state warn low minutes hours)
+ (when (file-directory-p "/proc/acpi/battery/")
+ ;; ACPI provides information about each battery present in the system in
+ ;; a separate subdirectory. We are going to merge the available
+ ;; information together since displaying for a variable amount of
+ ;; batteries seems overkill for format-strings.
+ (mapc
+ (lambda (dir)
+ (with-temp-buffer
+ (insert-file-contents (expand-file-name "state" dir))
+ (when (re-search-forward "present: +yes$" nil t)
+ (and (re-search-forward "charging state: +\\(.*\\)$" nil t)
+ (or (null charging-state) (string= charging-state
+ "unknown"))
+ ;; On most multi-battery systems, most of the time only one
+ ;; battery is "charging"/"discharging", the others are
+ ;; "unknown".
+ (setq charging-state (match-string 1)))
+ (when (re-search-forward "present rate: +\\([0-9]+\\) mA$" nil t)
+ (setq rate (+ (or rate 0) (string-to-int (match-string 1)))))
+ (when (re-search-forward "remaining capacity: +\\([0-9]+\\) mAh$"
+ nil t)
+ (setq capacity
+ (+ (or capacity 0) (string-to-int (match-string 1))))))
+ (goto-char (point-max))
+ (insert-file-contents (expand-file-name "info" dir))
+ (when (re-search-forward "present: +yes$" nil t)
+ (when (re-search-forward "design capacity: +\\([0-9]+\\) mAh$"
+ nil t)
+ (setq design-capacity (+ (or design-capacity 0)
+ (string-to-int (match-string 1)))))
+ (when (re-search-forward "design capacity warning: +\\([0-9]+\\) mAh$"
+ nil t)
+ (setq warn (+ (or warn 0) (string-to-int (match-string 1)))))
+ (when (re-search-forward "design capacity low: +\\([0-9]+\\) mAh$"
+ nil t)
+ (setq low (+ (or low 0)
+ (string-to-int (match-string 1))))))))
+ (directory-files "/proc/acpi/battery/" t "BAT")))
+ (and capacity rate
+ (setq minutes (floor (* (/ (float (if (string= charging-state
+ "charging")
+ (- design-capacity capacity)
+ capacity)) rate) 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: +\\(.*\\)$" nil t)
+ (match-string 1))))
+ "N/A"))
+ (cons ?d (or (when (file-exists-p
+ "/proc/acpi/thermal_zone/THRM/temperature")
+ (with-temp-buffer
+ (insert-file-contents
+ "/proc/acpi/thermal_zone/THRM/temperature")
+ (when (re-search-forward
+ "temperature: +\\([0-9]+\\) C$" nil t)
+ (match-string 1))))
+ "N/A"))
+ (cons ?r (or (and rate (number-to-string rate)) "N/A"))
+ (cons ?B (or charging-state "N/A"))
+ (cons ?b (or (and (string= charging-state "charging") "+")
+ (and low (< capacity low) "!")
+ (and warn (< capacity warn) "-")
+ ""))
+ (cons ?h (or (and hours (number-to-string hours)) "N/A"))
+ (cons ?m (or (and minutes (number-to-string minutes)) "N/A"))
+ (cons ?t (or (and minutes
+ (format "%d:%02d" hours (- minutes (* 60 hours))))
+ "N/A"))
+ (cons ?p (or (and design-capacity capacity
+ (number-to-string
+ (floor (/ capacity
+ (/ (float design-capacity) 100)))))
+ "N/A")))))
+
+\f
;;; Private functions.
(defun battery-format (format alist)
\f
(provide 'battery)
+;;; arch-tag: 65916f50-4754-4b6b-ac21-0b510f545a37
;;; battery.el ends here
HCoop / bpt / emacs.git / blobdiff