X-Git-Url: https://git.xinqibao.xyz/slstatus.git/blobdiff_plain/42edfea89a47cbf0623d1aaf5673a4e5ca79fb52..fa7c266e2b7adbc2a87bd44057b9e561d9ed61e3:/components/battery.c

diff --git a/components/battery.c b/components/battery.c
index 955d8ab..99e09d5 100644
--- a/components/battery.c
+++ b/components/battery.c
@@ -1,91 +1,202 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <stdio.h>
 #include <string.h>
-#if defined(__linux__)
-#include <limits.h>
-#include <string.h>
-#elif defined(__OpenBSD__)
-#include <sys/ioctl.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <machine/apmvar.h>
-#endif
 
 #include "../util.h"
 
 #if defined(__linux__)
-const char *
-battery_perc(const char *bat)
-{
-	int perc;
-	char path[PATH_MAX];
-
-	snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/capacity");
-	return (pscanf(path, "%i", &perc) == 1) ?
-	       bprintf("%d", perc) : NULL;
-}
-#elif defined(__OpenBSD__)
-const char *
-battery_perc(const char *null)
-{
-	struct apm_power_info apm_info;
-	int fd;
-
-	fd = open("/dev/apm", O_RDONLY);
-	if (fd < 0) {
-		fprintf(stderr, "open '/dev/apm': %s\n", strerror(errno));
+	#include <limits.h>
+	#include <unistd.h>
+
+	#define CHARGE_NOW "/sys/class/power_supply/%s/charge_now"
+	#define ENERGY_NOW "/sys/class/power_supply/%s/energy_now"
+	#define CURRENT_NOW "/sys/class/power_supply/%s/current_now"
+	#define POWER_NOW "/sys/class/power_supply/%s/power_now"
+
+	static const char *
+	pick(const char *bat, const char *f1, const char *f2, char *path,
+	     size_t length)
+	{
+		if (esnprintf(path, length, f1, bat) > 0 &&
+		    access(path, R_OK) == 0) {
+			return f1;
+		}
+
+		if (esnprintf(path, length, f2, bat) > 0 &&
+		    access(path, R_OK) == 0) {
+			return f2;
+		}
+
 		return NULL;
 	}
 
-	if (ioctl(fd, APM_IOC_GETPOWER, &apm_info) < 0) {
-		fprintf(stderr, "ioctl 'APM_IOC_GETPOWER': %s\n", strerror(errno));
-		close(fd);
+	const char *
+	battery_perc(const char *bat)
+	{
+		int perc;
+		char path[PATH_MAX];
+
+		if (esnprintf(path, sizeof(path),
+		              "/sys/class/power_supply/%s/capacity",
+		              bat) < 0) {
+			return NULL;
+		}
+		if (pscanf(path, "%d", &perc) != 1) {
+			return NULL;
+		}
+
+		return bprintf("%d", perc);
+	}
+
+	const char *
+	battery_state(const char *bat)
+	{
+		static struct {
+			char *state;
+			char *symbol;
+		} map[] = {
+			{ "Charging",    "+" },
+			{ "Discharging", "-" },
+		};
+		size_t i;
+		char path[PATH_MAX], state[12];
+
+		if (esnprintf(path, sizeof(path),
+		              "/sys/class/power_supply/%s/status",
+		              bat) < 0) {
+			return NULL;
+		}
+		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)
+	{
+		int charge_now, current_now, m, h;
+		double timeleft;
+		char path[PATH_MAX], state[12];
+
+		if (esnprintf(path, sizeof(path),
+		              "/sys/class/power_supply/%s/status",
+		              bat) < 0) {
+			return NULL;
+		}
+		if (pscanf(path, "%12s", state) != 1) {
+			return NULL;
+		}
+
+		if (!pick(bat, CHARGE_NOW, ENERGY_NOW, path, sizeof(path)) ||
+		    pscanf(path, "%d", &charge_now) < 0) {
+			return NULL;
+		}
+
+		if (!strcmp(state, "Discharging")) {
+			if (!pick(bat, CURRENT_NOW, POWER_NOW, path,
+			          sizeof(path)) ||
+			    pscanf(path, "%d", &current_now) < 0) {
+				return NULL;
+			}
+
+			if (current_now == 0) {
+				return NULL;
+			}
+
+			timeleft = (double)charge_now / (double)current_now;
+			h = timeleft;
+			m = (timeleft - (double)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);
+		}
+
 		return NULL;
 	}
-	close(fd);
 
-	return bprintf("%d", apm_info.battery_life);
-}
-#endif
+	const char *
+	battery_state(const char *unused)
+	{
+		struct {
+			unsigned int state;
+			char *symbol;
+		} map[] = {
+			{ APM_AC_ON,      "+" },
+			{ APM_AC_OFF,     "-" },
+		};
+		struct apm_power_info apm_info;
+		size_t i;
+
+		if (load_apm_power_info(&apm_info)) {
+			for (i = 0; i < LEN(map); i++) {
+				if (map[i].state == apm_info.ac_state) {
+					break;
+				}
+			}
+			return (i == LEN(map)) ? "?" : map[i].symbol;
+		}
 
-#if defined(__linux__)
-const char *
-battery_power(const char *bat)
-{
-	int watts;
-	char path[PATH_MAX];
-
-	snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/power_now");
-	return (pscanf(path, "%i", &watts) == 1) ?
-	       bprintf("%d", (watts + 500000) / 1000000) : NULL;
-}
-
-const char *
-battery_state(const char *bat)
-{
-	struct {
-		char *state;
-		char *symbol;
-	} map[] = {
-		{ "Charging",    "+" },
-		{ "Discharging", "-" },
-		{ "Full",        "=" },
-		{ "Unknown",     "/" },
-	};
-	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;
+	const char *
+	battery_remaining(const char *unused)
+	{
+		struct apm_power_info apm_info;
+
+		if (load_apm_power_info(&apm_info)) {
+			if (apm_info.ac_state != APM_AC_ON) {
+				return bprintf("%uh %02um",
+			                       apm_info.minutes_left / 60,
+				               apm_info.minutes_left % 60);
+			} else {
+				return "";
+			}
 		}
+
+		return NULL;
 	}
-	return (i == LEN(map)) ? "?" : map[i].symbol;
-}
 #endif