mpdclient: try IP connect if default local socket path fails

This is what libmpdclient does internally, and when ncmpc copied some
code from libmpdclient, it did not replicate this implementation
detail.

 https://bugs.musicpd.org/view.php?id=4672

diff --git a/NEWS b/NEWS
index 6956a1e50443562172eabd17bdf14393924718c8..5b3a4d036e7a08809284248673c13ce5205e28ad 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,5 @@
 ncmpc 0.27 - not yet released
+* work around connect failure if /var/run/mpd/socket does not exist
 * remove the status bar clock (option "display-time")
 * fix assertion failure after connect failure
 

diff --git a/src/mpdclient.c b/src/mpdclient.c
index 870839fd27dbb69ee8abd1d4b65e79d8c8567ee4..ffa1a5d84408e86757b82d2dbde1617dbf07c583 100644 (file)
--- a/src/mpdclient.c
+++ b/src/mpdclient.c
@@ -153,6 +153,25 @@ mpdclient_handle_error(struct mpdclient *c)
        return false;
 }
 
+#ifdef ENABLE_ASYNC_CONNECT
+#ifndef WIN32
+
+static bool
+is_local_socket(const char *host)
+{
+       return *host == '/' || *host == '@';
+}
+
+static bool
+settings_is_local_socket(const struct mpd_settings *settings)
+{
+       const char *host = mpd_settings_get_host(settings);
+       return host != NULL && is_local_socket(host);
+}
+
+#endif
+#endif
+
 struct mpdclient *
 mpdclient_new(const gchar *host, unsigned port,
              unsigned timeout_ms, const gchar *password)
@@ -164,6 +183,14 @@ mpdclient_new(const gchar *host, unsigned port,
                                       NULL, NULL);
        if (c->settings == NULL)
                g_error("Out of memory");
+
+#ifndef WIN32
+       c->settings2 = host == NULL && port == 0 &&
+               settings_is_local_socket(c->settings)
+               ? mpd_settings_new(host, 6600, timeout_ms, NULL, NULL)
+               : NULL;
+#endif
+
 #else
        c->host = host;
        c->port = port;
@@ -189,6 +216,11 @@ mpdclient_free(struct mpdclient *c)
 
 #ifdef ENABLE_ASYNC_CONNECT
        mpd_settings_free(c->settings);
+
+#ifndef WIN32
+       if (c->settings2 != NULL)
+               mpd_settings_free(c->settings2);
+#endif
 #endif
 
        g_free(c);
@@ -319,6 +351,10 @@ mpdclient_connected(struct mpdclient *c,
 
 #ifdef ENABLE_ASYNC_CONNECT
 
+static void
+mpdclient_aconnect_start(struct mpdclient *c,
+                        const struct mpd_settings *settings);
+
 static void
 mpdclient_connect_success(struct mpd_connection *connection, void *ctx)
 {
@@ -336,6 +372,14 @@ mpdclient_connect_error(const char *message, void *ctx)
        assert(c->async_connect != NULL);
        c->async_connect = NULL;
 
+#ifndef WIN32
+       if (!c->connecting2 && c->settings2 != NULL) {
+               c->connecting2 = true;
+               mpdclient_aconnect_start(c, c->settings2);
+               return;
+       }
+#endif
+
        mpdclient_error_callback(message);
        mpdclient_failed_callback();
 }
@@ -364,6 +408,9 @@ mpdclient_connect(struct mpdclient *c)
        mpdclient_disconnect(c);
 
 #ifdef ENABLE_ASYNC_CONNECT
+#ifndef WIN32
+       c->connecting2 = false;
+#endif
        mpdclient_aconnect_start(c, c->settings);
 #else
        /* connect to MPD */

diff --git a/src/mpdclient.h b/src/mpdclient.h
index d51013fc8c4176b29b4b23e1b1ccf1a74c9a3573..1d3b6e0b547d61f292480d6eff9da533230e4a03 100644 (file)
--- a/src/mpdclient.h
+++ b/src/mpdclient.h
@@ -11,7 +11,21 @@ struct filelist;
 
 struct mpdclient {
 #ifdef ENABLE_ASYNC_CONNECT
+       /**
+        * These settings are used to connect to MPD asynchronously.
+        */
        struct mpd_settings *settings;
+
+#ifndef WIN32
+       /**
+        * A second set of settings, just in case #settings did not
+        * work.  This is only used if #settings refers to a local
+        * socket path, and this one is supposed to be a fallback to
+        * IP on the default port (6600).
+        */
+       struct mpd_settings *settings2;
+#endif
+
 #else
        const char *host;
        unsigned port;
@@ -58,6 +72,10 @@ struct mpdclient {
         */
        enum mpd_idle events;
 
+#if defined(ENABLE_ASYNC_CONNECT) && !defined(WIN32)
+       bool connecting2;
+#endif
+
        /**
         * This attribute is true when the connection is currently in
         * "idle" mode, and the #mpd_glib_source waits for an event.