-/* 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