add configs

components/volume.c

@@ -219,3 +219,33 @@
 		return bprintf("%d", v & 0xff);
 	}
 #endif
+
+const char *
+vol_perc_pw(const char *sink)
+{
+	FILE *fp;
+	char buf[64], cmd[64];
+	double v;
+
+	if (esnprintf(cmd, sizeof(cmd), "wpctl get-volume %s", sink) < 0)
+		return NULL;
+
+	if (!(fp = popen(cmd, "r"))) {
+		warn("popen '%s':", cmd);
+		return NULL;
+	}
+
+	if (!fgets(buf, sizeof(buf), fp)) {
+		pclose(fp);
+		return NULL;
+	}
+	pclose(fp);
+
+	if (strstr(buf, "[MUTED]"))
+		return "mute";
+
+	if (sscanf(buf, "Volume: %lf", &v) != 1)
+		return NULL;
+
+	return bprintf("%d%%", (int)(v * 100 + 0.5));
+}