commit 37724ac2c3f496f4736223d0d8e5d8fecb933590
parent cbbf59fd3dde3f7cfbdc9807da5f5f42b664cf49
Author: David Demelier <[email protected]>
Date: Tue, 22 May 2018 09:23:29 +0200
Add basic backlight percentage support
At the moment linux only, but will add support for OpenBSD as well.
Diffstat:
6 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -6,6 +6,7 @@ include config.mk
REQ = util
COM =\
+ components/backlight\
components/battery\
components/cpu\
components/datetime\
diff --git a/README b/README
@@ -6,6 +6,7 @@ slstatus is a suckless status monitor for window managers that use WM_NAME
Features
--------
+- Backlight percentage
- Battery percentage/state/time left
- CPU usage
- CPU frequency
diff --git a/components/backlight.c b/components/backlight.c
@@ -0,0 +1,32 @@
+/* See LICENSE file for copyright and license details. */
+#include "../util.h"
+
+#if defined(__linux__)
+ #include <limits.h>
+
+ #define BRIGHTNESS_MAX "/sys/class/backlight/%s/max_brightness"
+ #define BRIGHTNESS_CUR "/sys/class/backlight/%s/brightness"
+
+ const char *
+ backlight_perc(const char *card)
+ {
+ char path[PATH_MAX];
+ int max, cur;
+
+ if (esnprintf(path, sizeof (path), BRIGHTNESS_MAX, card) < 0 ||
+ pscanf(path, "%d", &max) != 1) {
+ return NULL;
+ }
+
+ if (esnprintf(path, sizeof (path), BRIGHTNESS_CUR, card) < 0 ||
+ pscanf(path, "%d", &cur) != 1) {
+ return NULL;
+ }
+
+ if (max == 0) {
+ return NULL;
+ }
+
+ return bprintf("%d", cur * 100 / max);
+ }
+#endif
diff --git a/config.def.h b/config.def.h
@@ -12,6 +12,8 @@ static const char unknown_str[] = "n/a";
/*
* function description argument (example)
*
+ * backlight_perc backlight percentage device name
+ * (intel_backlight)
* battery_perc battery percentage battery name (BAT0)
* NULL on OpenBSD
* battery_state battery charging state battery name (BAT0)
diff --git a/slstatus.h b/slstatus.h
@@ -1,5 +1,8 @@
/* See LICENSE file for copyright and license details. */
+/* backlight */
+const char *backlight_perc(const char *);
+
/* battery */
const char *battery_perc(const char *);
const char *battery_state(const char *);
diff --git a/util.h b/util.h
@@ -1,4 +1,6 @@
/* See LICENSE file for copyright and license details. */
+#include <stddef.h>
+
extern char buf[1024];
#define LEN(x) (sizeof (x) / sizeof *(x))
