Add power consumption

dwmstatus.c

@@ -100,7 +100,11 @@ readfile(char *base, char *file)
 
 	memset(line, 0, sizeof(line));
 
+    if (file != NULL)
 	    path = smprintf("%s/%s", base, file);
+    else {
+        path = smprintf("%s", base);
+    }
 	fd = fopen(path, "r");
 	free(path);
 	if (fd == NULL)
@@ -194,6 +198,26 @@ getBrightness(char *base) {
 
     return smprintf("%s %d%% ", status, percentage);
 }
+char *
+getPowerConsumption(char *base) {
+    char *co;
+    long usageRead;
+    float usage;
+
+    co = readfile(base, NULL);
+    if (co == NULL)
+        return smprintf("");
+
+    sscanf(co, "%ld", &usageRead);
+    free(co);
+
+    if (usage == 0)
+        return smprintf("");
+
+    usage = usageRead/ 1e6;
+
+    return smprintf("%.2lf W ", usage);
+}
 
 char *
 gettemperature(char *base, char *sensor)
@@ -213,15 +237,17 @@ void update() {
     char *t0;
     char *bat;
     char *brightness;
+    char *powerConsumption;
 
     avgs = loadavg();
     tmbln = mktimes("%H:%M %d.%m.%Y", tzwarsaw);
     t0 = gettemperature("/sys/class//hwmon/hwmon1", "temp1_input");
     bat = getbattery("/sys/class/power_supply/BAT0");
     brightness = getBrightness("/sys/class/backlight/amdgpu_bl0");
+    powerConsumption = getPowerConsumption("/sys/class/power_supply/BAT0/power_now");
 
-    status = smprintf("%s%s%s%s%s",
+    status = smprintf("%s%s%s%s%s%s",
-                      bat, brightness, t0, avgs, tmbln);
+                      powerConsumption, bat, brightness, t0, avgs, tmbln);
     setstatus(status);
 
     free(t0);