1 files changed, 47 insertions, 1 deletions
diff --git a/shell/main.c b/shell/main.c
index 9b38ee6..33cb14e 100644
--- a/shell/main.c
+++ b/shell/main.c
@@ -70,6 +70,48 @@ load_files (const char **files)
 }
 
 #ifdef ENABLE_DBUS
+
+#ifndef HAVE_GTK_WINDOW_PRESENT_WITH_TIME
+static guint32
+get_startup_time (void)
+{
+	const char *envvar, *timestamp;
+	unsigned long value;
+	char *end;
+
+	envvar = getenv ("DESKTOP_STARTUP_ID");
+
+	if (envvar == NULL)
+		return 0;
+
+/* DESKTOP_STARTUP_ID is of form "<unique>_TIME<timestamp>".
+ *
+ * <unique> might contain a T but <timestamp> is an integer.  As such,
+ * the last 'T' in the string must be the start of "TIME".
+ */
+	timestamp = rindex (envvar, 'T');
+
+/* Maybe the word "TIME" was not found... */
+	if (timestamp == NULL || strncmp (timestamp, "TIME", 4))
+		return 0;
+
+	timestamp += 4;
+
+/* strtoul sets errno = ERANGE on overflow, but it is not specified
+ * if it sets it to 0 on success.  Doing so ourselves is the only
+ * way to know for sure.
+ */
+	errno = 0;
+	value = strtoul (timestamp, &end, 10);
+
+/* unsigned long might be 64bit, so double-check! */
+	if (errno != 0 || *end != '\0' || value > G_MAXINT32)
+		return 0;
+
+	return value;
+}
+#endif
+
 static gboolean
 load_files_remote (const char **files)
 {
@@ -84,9 +126,13 @@ load_files_remote (const char **files)
 	GdkDisplay *display;
 	guint32 timestamp;
 
+#ifdef HAVE_GTK_WINDOW_PRESENT_WITH_TIME
 	display = gdk_display_get_default();
 	timestamp = gdk_x11_display_get_user_time (display);
-
+#else
+	/* Fake it for GTK+2.6 */
+	timestamp = get_startup_time ();
+#endif
 	connection = dbus_g_bus_get (DBUS_BUS_SESSION, &error);
 	if (connection == NULL) {
 		g_warning (error->message);