Add basic backlight percentage support
At the moment linux only, but will add support for OpenBSD as well.
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1
Makefile
1
Makefile
@ -6,6 +6,7 @@ include config.mk
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REQ = util
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COM =\
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components/backlight\
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components/battery\
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components/cpu\
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components/datetime\
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1
README
1
README
@ -6,6 +6,7 @@ slstatus is a suckless status monitor for window managers that use WM_NAME
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Features
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--------
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- Backlight percentage
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- Battery percentage/state/time left
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- CPU usage
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- CPU frequency
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32
components/backlight.c
Normal file
32
components/backlight.c
Normal file
@ -0,0 +1,32 @@
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/* See LICENSE file for copyright and license details. */
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#include "../util.h"
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#if defined(__linux__)
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#include <limits.h>
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#define BRIGHTNESS_MAX "/sys/class/backlight/%s/max_brightness"
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#define BRIGHTNESS_CUR "/sys/class/backlight/%s/brightness"
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const char *
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backlight_perc(const char *card)
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{
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char path[PATH_MAX];
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int max, cur;
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if (esnprintf(path, sizeof (path), BRIGHTNESS_MAX, card) < 0 ||
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pscanf(path, "%d", &max) != 1) {
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return NULL;
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}
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if (esnprintf(path, sizeof (path), BRIGHTNESS_CUR, card) < 0 ||
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pscanf(path, "%d", &cur) != 1) {
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return NULL;
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}
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if (max == 0) {
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return NULL;
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}
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return bprintf("%d", cur * 100 / max);
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}
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#endif
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@ -12,6 +12,8 @@ static const char unknown_str[] = "n/a";
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/*
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* function description argument (example)
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*
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* backlight_perc backlight percentage device name
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* (intel_backlight)
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* battery_perc battery percentage battery name (BAT0)
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* NULL on OpenBSD
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* battery_state battery charging state battery name (BAT0)
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@ -1,5 +1,8 @@
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/* See LICENSE file for copyright and license details. */
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/* backlight */
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const char *backlight_perc(const char *);
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/* battery */
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const char *battery_perc(const char *);
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const char *battery_state(const char *);
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