- fd = open("/dev/apm", O_RDONLY);
- if (fd < 0) {
- fprintf(stderr, "Failed to open file /dev/apm");
+ snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
+ bat, "/capacity");
+ return (pscanf(path, "%i", &perc) == 1) ? bprintf("%d", perc) : NULL;
+ }
+
+ const char *
+ battery_state(const char *bat)
+ {
+ struct {
+ char *state;
+ char *symbol;
+ } map[] = {
+ { "Charging", "+" },
+ { "Discharging", "-" },
+ };
+ size_t i;
+ char path[PATH_MAX], state[12];
+
+ snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
+ bat, "/status");
+ if (pscanf(path, "%12s", state) != 1) {
+ return NULL;
+ }
+
+ for (i = 0; i < LEN(map); i++) {
+ if (!strcmp(map[i].state, state)) {
+ break;
+ }
+ }
+ return (i == LEN(map)) ? "?" : map[i].symbol;
+ }
+
+ const char *
+ battery_remaining(const char *bat)
+ {
+ /* TODO: Implement */