Update 2022-12-05 22:40 OpenBSD/amd64

.config/spectrwm/cbar.c

@@ -2,6 +2,7 @@
 #include <unistd.h>
 #include <wchar.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include <fcntl.h>
 
@@ -10,6 +11,12 @@
 #include <sys/ioctl.h>
 #include <sys/sensors.h>
 
+#include <sys/audioio.h>
+#include <ifaddrs.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/param.h>
+
 #include <machine/apmvar.h>
 
 
@@ -18,24 +25,73 @@ static int cpu_temp = 46;
 static int fan_speed = 3392;
 static int cpu_base_speed = 2501;
 static int cpu_avg_speed = 468;
+static int volume = 50;
+
+
+void update_volume() {
+    static int                  cls = -1, fd, v;
+    static struct mixer_devinfo mdi;
+    static struct mixer_ctrl    mc;
+
+    if ((fd = open("/dev/mixer", O_RDONLY)) == -1) {
+        volume = -1;
+    }
+
+    for (mdi.index = 0; cls == -1; ++mdi.index) {
+        if (ioctl(fd, AUDIO_MIXER_DEVINFO, &mdi) == -1)
+            goto fail;
+        if (mdi.type == AUDIO_MIXER_CLASS &&
+                strcmp(mdi.label.name, AudioCoutputs) == 0)
+            cls = mdi.index;
+    }
+    for (mdi.index = 0, v = -1; v == -1; ++mdi.index) {
+        if (ioctl(fd, AUDIO_MIXER_DEVINFO, &mdi) == -1)
+            goto fail;
+        if (mdi.type == AUDIO_MIXER_VALUE &&
+                mdi.prev == AUDIO_MIXER_LAST &&
+                mdi.mixer_class == cls &&
+                strcmp(mdi.label.name, AudioNmaster) == 0) {
+            mc.dev = mdi.index;
+            if (ioctl(fd, AUDIO_MIXER_READ, &mc) == -1)
+                goto fail;
+            v = MAX(mc.un.value.level[AUDIO_MIXER_LEVEL_MONO],
+                    mc.un.value.level[AUDIO_MIXER_LEVEL_RIGHT]);
+        }
+    }
+
+    if (v == -1 || close(fd) == -1) {
+        volume = -1;
+        return;
+    }
+
+    volume = v * 100 / 255;
+
+fail:
+    (void)close(fd);
+    volume = -1;
+    return;
+}
 
 void update_fan_speed() {
     struct sensor sensor;
     size_t slen = sizeof(sensor);
     // XXX hw.sensors.acpithinkpad0.fan0
     int mib[5] = { CTL_HW, HW_SENSORS, 5, SENSOR_FANRPM, 0 }; // Lenovo x230
-    if (sysctl(mib, 5, &sensor, &slen, NULL, 0) != -1)
+    if (sysctl(mib, 5, &sensor, &slen, NULL, 0) != -1) {
         fan_speed = sensor.value;
+        return;
+    }
     fan_speed = -1;
 }
 
 void update_cpu_temp() {
     struct sensor sensor;
     size_t slen = sizeof(sensor);
-    // XXX hw.sensors.cpu0.temp0
-    int mib[5] = { CTL_HW, HW_SENSORS, 0, SENSOR_TEMP, 0 }; // Lenovo x230
-    if (sysctl(mib, 5, &sensor, &slen, NULL, 0) != -1)
+    int mib[5] = { CTL_HW, HW_SENSORS, 0, SENSOR_TEMP, 0 };
+    if (sysctl(mib, 5, &sensor, &slen, NULL, 0) != -1) {
         cpu_temp = (sensor.value  - 273150000) / 1000000.0;
+        return;
+    }
     cpu_temp = -1;
 }
 
@@ -45,12 +101,16 @@ void update_battery() {
 
     if ((fd = open("/dev/apm", O_RDONLY)) == -1 ||
             ioctl(fd, APM_IOC_GETPOWER, &pi) == -1 ||
-            close(fd) == -1)
+            close(fd) == -1) {
         battery_percent = -1;
+        return;
+    }
 
     if (pi.battery_state == APM_BATT_UNKNOWN ||
-            pi.battery_state == APM_BATTERY_ABSENT)
+            pi.battery_state == APM_BATTERY_ABSENT) {
         battery_percent = -1;
+        return;
+    }
 
     battery_percent = pi.battery_life;
 }
@@ -59,9 +119,13 @@ int main(int argc, const char *argv[])
 {
 
     while(1) {
+
+        // XXX can update at different intervals
         update_battery();
         update_cpu_temp();
         update_fan_speed();
+        update_volume();
+
         wprintf(L"%s %d%% %s %dC %s %4dRPM %s %4dMhz (~%4dMhz) %s\n",
                "", battery_percent,
              " ", cpu_temp,