You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
679 B
32 lines
679 B
/* 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
|
|
|