gpgconf,w32: Print a warning for a suspicious homedir.

* tools/gpgconf.c (list_dirs): Check whether the homedir has been
taken from the registry.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 7f12fb55f9)

common/homedir.c

@@ -305,6 +305,9 @@ default_homedir (void)
             {
               char *tmp, *p;
 
+              /* This is deprecated; gpgconf --list-dirs prints a
+               * warning if the homedir has been taken from the
+               * registry.  */
               tmp = read_w32_registry_string (NULL,
                                               GNUPG_REGISTRY_DIR,
                                               "HomeDir");

tools/gpgconf.c

@@ -274,6 +274,20 @@ list_dirs (estream_t fp, char **names)
 
       xfree (tmp);
     }
+
+
+#ifdef HAVE_W32_SYSTEM
+  tmp = read_w32_registry_string (NULL,
+                                  GNUPG_REGISTRY_DIR,
+                                  "HomeDir");
+  if (tmp)
+    {
+      es_fflush (fp);
+      log_info ("Warning: homedir taken from registry key (%s %s)\n",
+                GNUPG_REGISTRY_DIR, "HomeDir");
+      xfree (tmp);
+    }
+#endif /*HAVE_W32_SYSTEM*/
 }