[geary] "View Source" creates tmp files only readable by user: Bug #724436

[Jim Nelson <jnelson src gnome org>]

commit 4f8cadc3e8ceb6a382c8c598d095e14137b5b662
Author: Jim Nelson <jim yorba org>
Date:   Thu Oct 9 13:54:37 2014 -0700

    "View Source" creates tmp files only readable by user: Bug #724436

 .../conversation-viewer/conversation-viewer.vala   |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/client/conversation-viewer/conversation-viewer.vala 
b/src/client/conversation-viewer/conversation-viewer.vala
index 0148335..140ccc2 100644
--- a/src/client/conversation-viewer/conversation-viewer.vala
+++ b/src/client/conversation-viewer/conversation-viewer.vala
@@ -2176,6 +2176,11 @@ public class ConversationViewer : Gtk.Box {
                 out temporary_filename);
             FileUtils.set_contents(temporary_filename, source);
             FileUtils.close(temporary_handle);
+            
+            // ensure this file is only readable by the user ... this needs to be done after the
+            // file is closed
+            FileUtils.chmod(temporary_filename, (int) (Posix.S_IRUSR | Posix.S_IWUSR));
+            
             string temporary_uri = Filename.to_uri(temporary_filename, null);
             Gtk.show_uri(web_view.get_screen(), temporary_uri, Gdk.CURRENT_TIME);
         } catch (Error error) {