+ const char *
+ battery_remaining(const char *bat)
+ {
+ int charge_now, current_now, m, h;
+ float timeleft;
+ 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;
+ }
+
+ if (!strcmp(state, "Discharging")) {
+ snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
+ bat, "/charge_now");
+ if (pscanf(path, "%d", &charge_now) != 1) {
+ return NULL;
+ }
+ snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
+ bat, "/current_now");
+ if (pscanf(path, "%d", ¤t_now) != 1) {
+ return NULL;
+ }
+
+ timeleft = (float)charge_now / (float)current_now;
+ h = timeleft;
+ m = (timeleft - (float)h) * 60;
+
+ return bprintf("%dh %dm", h, m);
+ }
+
+ return "";
+ }
+#elif defined(__OpenBSD__)
+ #include <fcntl.h>
+ #include <machine/apmvar.h>
+ #include <sys/ioctl.h>
+ #include <unistd.h>
+
+ static int
+ load_apm_power_info(struct apm_power_info *apm_info)
+ {
+ int fd;
+
+ fd = open("/dev/apm", O_RDONLY);
+ if (fd < 0) {
+ warn("open '/dev/apm':");
+ return 0;
+ }
+
+ memset(apm_info, 0, sizeof(struct apm_power_info));
+ if (ioctl(fd, APM_IOC_GETPOWER, apm_info) < 0) {
+ warn("ioctl 'APM_IOC_GETPOWER':");
+ close(fd);
+ return 0;
+ }
+ return close(fd), 1;
+ }
+
+ const char *
+ battery_perc(const char *unused)
+ {
+ struct apm_power_info apm_info;
+
+ if (load_apm_power_info(&apm_info)) {
+ return bprintf("%d", apm_info.battery_life);
+ }
+