add playing song

config.h

@@ -66,5 +66,11 @@ static const char unknown_str[] = "n/a";
  */
 static const struct arg args[] = {
     /* function          format          argument */
-    {wifi_essid, "%s", "wlp3s0"}, {wifi_perc, " %s%% |", "wlp3s0"}, {battery_perc, " bat %s%%", "BAT0"}, {battery_state, "%s |", "BAT0"}, {vol_perc_pw, " vol %s |", "@DEFAULT_AUDIO_SINK@"}, {datetime, " %s", "%d.%m.%Y | %H:%M"},
+    {run_command, "%s | ", "playerctl metadata --player=spotify --format '{{artist}} - {{title}}'"},
+    {wifi_essid, "%s", "wlp3s0"},
+    {wifi_perc, " %s%% |", "wlp3s0"},
+    {battery_perc, " bat %s%%", "BAT0"},
+    {battery_state, "%s |", "BAT0"},
+    {vol_perc_pw, " vol %s |", "@DEFAULT_AUDIO_SINK@"},
+    {datetime, " %s", "%d.%m.%Y | %H:%M"},
 };