command: don't allow adding local files on WIN32

There are no unix sockets on WIN32, and therefore no authentication.
WIN32 might have similar capabilities, but until we implement them,
disable that MPD feature.

src/command.c

@@ -451,8 +451,12 @@ handle_add(struct client *client, G_GNUC_UNUSED int argc, char *argv[])
 	enum playlist_result result;
 
 	if (strncmp(path, "file:///", 8) == 0) {
+#ifndef WIN32
+		result = PLAYLIST_RESULT_DENIED;
+#else
 		result = playlist_append_file(path + 7, client_get_uid(client),
 					      NULL);
+#endif
 		return print_playlist_result(client, result);
 	}
 

src/playlist.c

@@ -517,6 +517,7 @@ static void clearPlayerQueue(void)
 	pc_cancel();
 }
 
+#ifndef WIN32
 enum playlist_result
 playlist_append_file(const char *path, int uid, unsigned *added_id)
 {
@@ -542,6 +543,7 @@ playlist_append_file(const char *path, int uid, unsigned *added_id)
 
 	return addSongToPlaylist(song, added_id);
 }
+#endif
 
 static struct song *
 song_by_url(const char *url)

src/playlist.h

@@ -75,12 +75,14 @@ void savePlaylistState(FILE *);
 
 void clearPlaylist(void);
 
+#ifndef WIN32
 /**
  * Appends a local file (outside the music database) to the playlist,
  * but only if the file's owner is equal to the specified uid.
  */
 enum playlist_result
 playlist_append_file(const char *path, int uid, unsigned *added_id);
+#endif
 
 enum playlist_result addToPlaylist(const char *file, unsigned *added_id);