retry on failure to connect to rc-unix socket. Patch by Greg Farrell (greg a ...

retry on failure to connect to rc-unix socket. Patch by Greg Farrell (greg  a  lincor.com), submitted by Dermot McGahon (dermot  a  dspsrv.com)

modules/control/rc.c

@@ -167,6 +167,10 @@ void __msg_rc( intf_thread_t *p_intf, const char *psz_fmt, ... )
 #define UNIX_LONGTEXT N_("Accept commands over a Unix socket rather than " \
                          "stdin." )
 
+#define OVERWRITE_TEXT N_("Over-write UNIX socket")
+#define OVERWRITE_LONGTEXT N_("If unable to bind RC interface to the specified " \
+			 " UNIX socket will attempt to unlink it then retry." )
+
 #define HOST_TEXT N_("TCP command input")
 #define HOST_LONGTEXT N_("Accept commands over a socket rather than stdin. " \
             "You can set the address and port the interface will bind to." )
@@ -191,6 +195,7 @@ vlc_module_begin();
 #endif
     add_string( "rc-unix", 0, NULL, UNIX_TEXT, UNIX_LONGTEXT, VLC_TRUE );
     add_string( "rc-host", 0, NULL, HOST_TEXT, HOST_LONGTEXT, VLC_TRUE );
+    add_bool( "rc-overwrite", 0, NULL, OVERWRITE_TEXT, OVERWRITE_LONGTEXT, VLC_TRUE );
 
 #ifdef WIN32
     add_bool( "rc-quiet", 0, NULL, QUIET_TEXT, QUIET_LONGTEXT, VLC_FALSE );
@@ -221,7 +226,10 @@ static int Activate( vlc_object_t *p_this )
     psz_unix_path = config_GetPsz( p_intf, "rc-unix" );
     if( psz_unix_path )
     {
-        int i_socket;
+        int i_socket, i_overwrite;
+
+	i_overwrite = config_GetInt( p_intf, "rc-overwrite" );
+
 
 #if !defined(AF_LOCAL) || defined(WIN32)
         msg_Warn( p_intf, "your OS doesn't support filesystem sockets" );
@@ -249,12 +257,23 @@ static int Activate( vlc_object_t *p_this )
         if( (i_ret = bind( i_socket, (struct sockaddr*)&addr,
                            sizeof(struct sockaddr_un) ) ) < 0 )
         {
+	    if( i_overwrite )
+            {
+                msg_Warn( p_intf, "Found old UNIX socket: %s, deleting and re-trying", psz_unix_path );
+	        unlink( psz_unix_path ); 
+            }
+	    
+            if( !i_overwrite || bind( i_socket, (struct sockaddr*)&addr,
+                           sizeof(struct sockaddr_un) ) < 0 )
+            {
+            
                 msg_Warn( p_intf, "couldn't bind socket to address: %s",
                            strerror(errno) );
                 free( psz_unix_path );
                 net_Close( i_socket );
                 return VLC_EGENERIC;
             }
+        }
 
         if( ( i_ret = listen( i_socket, 1 ) ) < 0 )
         {