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Fix leds getting unset when closing the program

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dec05eba
2025-11-08 13:24:40 +01:00
parent f017f04bdc
commit 2506750243
6 changed files with 105 additions and 18 deletions
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60
tools/gsr-global-hotkeys/leds.c
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@@ -15,27 +15,37 @@
/* LINUX */
#include <linux/input.h>
static int get_max_brightness(const char *sys_class_path, const char *filename) {
char path[PATH_MAX];
snprintf(path, sizeof(path), "%s/%s/max_brightness", sys_class_path, filename);
const int fd = open(path, O_RDONLY);
/* Returns -1 on error */
static int read_int_from_file(const char *filepath) {
const int fd = open(filepath, O_RDONLY);
if(fd == -1) {
fprintf(stderr, "Warning: get_max_brightness open error: %s\n", strerror(errno));
return false;
return -1;
}
bool success = false;
int max_brightness = 0;
int value = 0;
char buffer[32];
const ssize_t num_bytes_read = read(fd, buffer, sizeof(buffer));
if(num_bytes_read > 0) {
buffer[num_bytes_read] = '\0';
success = sscanf(buffer, "%d", &max_brightness) == 1;
success = sscanf(buffer, "%d", &value) == 1;
}
close(fd);
return success;
return success ? value : -1;
}
static int get_max_brightness(const char *sys_class_path, const char *filename) {
char path[PATH_MAX];
snprintf(path, sizeof(path), "%s/%s/max_brightness", sys_class_path, filename);
return read_int_from_file(path);
}
static int get_brightness(const char *sys_class_path, const char *filename) {
char path[PATH_MAX];
snprintf(path, sizeof(path), "%s/%s/brightness", sys_class_path, filename);
return read_int_from_file(path);
}
static bool string_starts_with(const char *str, const char *sub) {
@@ -137,3 +147,35 @@ bool set_leds(const char *led_name, bool enabled) {
return false;
}
}
bool get_leds(int event_number, ggh_leds *leds) {
leds->scroll_lock_brightness = -1;
leds->num_lock_brightness = -1;
leds->caps_lock_brightness = -1;
char path[PATH_MAX];
snprintf(path, sizeof(path), "/sys/class/input/event%d/device", event_number);
DIR *dir = opendir(path);
if(!dir)
return false;
struct dirent *entry;
while((entry = readdir(dir)) != NULL) {
if(entry->d_name[0] == '.')
continue;
if(!string_starts_with(entry->d_name, "input"))
continue;
if(string_ends_with(entry->d_name, "::scrolllock"))
leds->scroll_lock_brightness = get_brightness(path, entry->d_name);
else if(string_ends_with(entry->d_name, "::numlock"))
leds->num_lock_brightness = get_brightness(path, entry->d_name);
else if(string_ends_with(entry->d_name, "::capslock"))
leds->caps_lock_brightness = get_brightness(path, entry->d_name);
}
closedir(dir);
return true;
}