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[slstatus.git] / components / battery.c

diff --git a/components/battery.c b/components/battery.c
index 3965e8f..f2b0f14 100644 (file)
--- a/components/battery.c
+++ b/components/battery.c
@@ -1,5 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
 #include <stdio.h>
 #include <string.h>
 
@@ -7,6 +6,25 @@
 
 #if defined(__linux__)
        #include <limits.h>
+       #include <stdint.h>
+       #include <unistd.h>
+
+       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;
+       }
 
        const char *
        battery_perc(const char *bat)
@@ -14,26 +32,35 @@
                int perc;
                char path[PATH_MAX];
 
-               snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
-                        bat, "/capacity");
-               return (pscanf(path, "%d", &perc) == 1) ? bprintf("%d", perc) : NULL;
+               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)
        {
-               struct {
+               static struct {
                        char *state;
                        char *symbol;
                } map[] = {
                        { "Charging",    "+" },
                        { "Discharging", "-" },
+                       { "Full",        "o" },
                };
                size_t i;
                char path[PATH_MAX], state[12];
 
-               snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
-                        bat, "/status");
+               if (esnprintf(path, sizeof(path),
+                             "/sys/class/power_supply/%s/status", bat) < 0) {
+                       return NULL;
+               }
                if (pscanf(path, "%12s", state) != 1) {
                        return NULL;
                }
@@ -49,33 +76,42 @@
        const char *
        battery_remaining(const char *bat)
        {
-               int charge_now, current_now, m, h;
-               float timeleft;
+               uintmax_t charge_now, current_now, m, h;
+               double timeleft;
                char path[PATH_MAX], state[12];
 
-               snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
-                        bat, "/status");
+               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, "/sys/class/power_supply/%s/charge_now",
+                         "/sys/class/power_supply/%s/energy_now", path,
+                         sizeof(path)) ||
+                   pscanf(path, "%ju", &charge_now) < 0) {
+                       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) {
+                       if (!pick(bat, "/sys/class/power_supply/%s/current_now",
+                                 "/sys/class/power_supply/%s/power_now", path,
+                                 sizeof(path)) ||
+                           pscanf(path, "%ju", &current_now) < 0) {
                                return NULL;
                        }
-                       snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
-                                        bat, "/current_now");
-                       if (pscanf(path, "%d", &current_now) != 1) {
+
+                       if (current_now == 0) {
                                return NULL;
                        }
 
-                       timeleft = (float)charge_now / (float)current_now;
+                       timeleft = (double)charge_now / (double)current_now;
                        h = timeleft;
-                       m = (timeleft - (float)h) * 60;
+                       m = (timeleft - (double)h) * 60;
 
-                       return bprintf("%dh %dm", h, m);
+                       return bprintf("%juh %jum", h, m);
                }
 
                return "";
@@ -121,8 +157,6 @@
        const char *
        battery_state(const char *unused)
        {
-               struct apm_power_info apm_info;
-               size_t i;
                struct {
                        unsigned int state;
                        char *symbol;
@@ -130,6 +164,8 @@
                        { 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++) {
@@ -150,7 +186,8 @@
 
                if (load_apm_power_info(&apm_info)) {
                        if (apm_info.ac_state != APM_AC_ON) {
-                               return bprintf("%uh %02um", apm_info.minutes_left / 60,
+                               return bprintf("%uh %02um",
+                                              apm_info.minutes_left / 60,
                                               apm_info.minutes_left % 60);
                        } else {
                                return "";
@@ -159,4 +196,57 @@
 
                return NULL;
        }
+#elif defined(__FreeBSD__)
+       #include <sys/sysctl.h>
+
+       const char *
+       battery_perc(const char *unused)
+       {
+               int cap;
+               size_t len;
+
+               len = sizeof(cap);
+               if (sysctlbyname("hw.acpi.battery.life", &cap, &len, NULL, 0) == -1
+                               || !len)
+                       return NULL;
+
+               return bprintf("%d", cap);
+       }
+
+       const char *
+       battery_state(const char *unused)
+       {
+               int state;
+               size_t len;
+
+               len = sizeof(state);
+               if (sysctlbyname("hw.acpi.battery.state", &state, &len, NULL, 0) == -1
+                               || !len)
+                       return NULL;
+
+               switch(state) {
+                       case 0:
+                       case 2:
+                               return "+";
+                       case 1:
+                               return "-";
+                       default:
+                               return "?";
+               }
+       }
+
+       const char *
+       battery_remaining(const char *unused)
+       {
+               int rem;
+               size_t len;
+
+               len = sizeof(rem);
+               if (sysctlbyname("hw.acpi.battery.time", &rem, &len, NULL, 0) == -1
+                               || !len
+                               || rem == -1)
+                       return NULL;
+
+               return bprintf("%uh %02um", rem / 60, rem % 60);
+       }
 #endif