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brightness script: correctly build sysfs path

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LordMZTE 2023-11-19 11:52:26 +01:00
parent c7a67aeb4c
commit d04f3bb2df
Signed by: LordMZTE
GPG key ID: B64802DC33A64FF6
1 changed files with 5 additions and 2 deletions
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7
scripts/brightness.rkt
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@ -20,9 +20,12 @@
(when (sysfs)
(for ([dir (directory-list "/sys/class/backlight")])
(printf "sysfs: ~a\n" dir)
(let* ([max-brightness (string->number (file->string (build-path dir "max_brightness")))]
(let* ([max-brightness (string->number
(string-trim
(file->string
(build-path "/sys/class/backlight" dir "max_brightness"))))]
[rel-brightness (exact-round (* brightness (/ max-brightness 100)))]
[brightness-path (build-path dir "brightness")])
[brightness-path (build-path "/sys/class/backlight" dir "brightness")])
(display-to-file rel-brightness brightness-path #:exists 'truncate))))
(match* ((ddc) (find-executable-path "ddcutil"))