From 37724ac2c3f496f4736223d0d8e5d8fecb933590 Mon Sep 17 00:00:00 2001 From: David Demelier Date: Tue, 22 May 2018 09:23:29 +0200 Subject: [PATCH] Add basic backlight percentage support At the moment linux only, but will add support for OpenBSD as well. --- Makefile | 1 + README | 1 + components/backlight.c | 32 ++++++++++++++++++++++++++++++++ config.def.h | 2 ++ slstatus.h | 3 +++ util.h | 2 ++ 6 files changed, 41 insertions(+) create mode 100644 components/backlight.c diff --git a/Makefile b/Makefile index 0e925cc..8e18969 100644 --- 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 index c278599..f6041de 100644 --- 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 new file mode 100644 index 0000000..f9c4096 --- /dev/null +++ b/components/backlight.c @@ -0,0 +1,32 @@ +/* See LICENSE file for copyright and license details. */ +#include "../util.h" + +#if defined(__linux__) + #include + + #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 index f144393..45320a3 100644 --- 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 index 8bd8bb5..a18b881 100644 --- 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 index b474f88..f55c0eb 100644 --- a/util.h +++ b/util.h @@ -1,4 +1,6 @@ /* See LICENSE file for copyright and license details. */ +#include + extern char buf[1024]; #define LEN(x) (sizeof (x) / sizeof *(x))