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StumpWM: rewrote backlight changing command using sysfs

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This commit is contained in:
Marcel Kapfer 2018-09-03 00:06:01 +02:00
parent 5ffa8fc7cc
commit 7b7125538d
Signed by: mmk2410
GPG key ID: CADE6F0C09F21B09
1 changed files with 26 additions and 7 deletions
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33
stumpwm/stumpwmrc
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@ -175,14 +175,33 @@
;; (if (not (head-mode-line (current-head)))
;; (toggle-mode-line (current-screen) (current-head)))
;; set backlight
(defcommand set-backlight (value)
((:string "Backlight in %: "))
"Setting a new value for the backlight"
(run-shell-command (concatenate 'string "xbacklight -set " value))
(echo (concatenate 'string "Backlight set to " value)))
(defparameter *backlight-sysfs* "/sys/class/backlight/intel_backlight/")
(define-key *root-map* (kbd "B") "set-backlight")
(defun get-max-backlight ()
"Retrieve maximal backlight brightness from sysfs"
(let ((max-backlight-file (concatenate 'string *backlight-sysfs* "max_brightness")))
(if (probe-file max-backlight-file)
(with-open-file (in max-backlight-file)
(read-line in))
nil)))
(defun set-backlight (value)
"Set backlight to given value"
(let ((backlight-file (concatenate 'string *backlight-sysfs* "brightness")))
(if (probe-file backlight-file)
(with-open-file (out backlight-file
:direction :output
:if-exists :overwrite)
(format out "~D" (truncate value))))))
;; set backlight
(defcommand change-backlight (value)
((:number "Backlight in %: "))
"Setting a new backlight value"
(let ((max-backlight (get-max-backlight)))
(if max-backlight
(set-backlight (* 0.01 value (parse-integer max-backlight)))
(echo "Can't set backlight"))))
;; tweet
(defcommand tweet (tweet)