gpg,sm: Avoid useless ASFW diagnostic in loopback mode.

* common/sysutils.c (inhibit_set_foregound_window): New var.
(gnupg_inhibit_set_foregound_window): New func.
(gnupg_allow_set_foregound_window): Use var.
* g10/gpg.c (main): Inhibit in loopback mode.
* sm/gpgsm.c (main): Ditto.
--

Signed-off-by: Werner Koch <wk@gnupg.org>

common/sysutils.c

@@ -87,6 +87,11 @@
  * an explanation of these file names.  */
 static int allow_special_filenames;
 
+#ifdef HAVE_W32_SYSTEM
+/* State of gnupg_inhibit_set_foregound_window.  */
+static int inhibit_set_foregound_window;
+#endif
+
 
 static GPGRT_INLINE gpg_error_t
 my_error_from_syserror (void)
@@ -612,6 +617,20 @@ gnupg_reopen_std (const char *pgmname)
 }
 
 
+/* Inhibit calls to AllowSetForegroundWindow on Windows.  Calling this
+ * with YES set to true calls to gnupg_allow_set_foregound_window are
+ * shunted.  */
+void
+gnupg_inhibit_set_foregound_window (int yes)
+{
+#ifdef HAVE_W32_SYSTEM
+  inhibit_set_foregound_window = yes;
+#else
+  (void)yes;
+#endif
+}
+
+
 /* Hack required for Windows.  */
 void
 gnupg_allow_set_foregound_window (pid_t pid)
@@ -620,6 +639,8 @@ gnupg_allow_set_foregound_window (pid_t pid)
     log_info ("%s called with invalid pid %lu\n",
               "gnupg_allow_set_foregound_window", (unsigned long)pid);
 #if defined(HAVE_W32_SYSTEM) && !defined(HAVE_W32CE_SYSTEM)
+  else if (inhibit_set_foregound_window)
+    ;
   else if (!AllowSetForegroundWindow ((pid_t)pid == (pid_t)(-1)?ASFW_ANY:pid))
     log_info ("AllowSetForegroundWindow(%lu) failed: %s\n",
                (unsigned long)pid, w32_strerror (-1));

common/sysutils.h

@@ -61,6 +61,7 @@ int translate_sys2libc_fd_int (int fd, int for_write);
 int check_special_filename (const char *fname, int for_write, int notranslate);
 FILE *gnupg_tmpfile (void);
 void gnupg_reopen_std (const char *pgmname);
+void gnupg_inhibit_set_foregound_window (int yes);
 void gnupg_allow_set_foregound_window (pid_t pid);
 int  gnupg_remove (const char *fname);
 gpg_error_t gnupg_rename_file (const char *oldname, const char *newname,

g10/gpg.c

@@ -4167,6 +4167,15 @@ main (int argc, char **argv)
 	opt.passphrase_repeat = 0;
       }
 
+    /* If no pinentry is expected shunt
+     * gnupg_allow_set_foregound_window to avoid useless error
+     * messages on Windows.  */
+    if (opt.pinentry_mode != PINENTRY_MODE_ASK)
+      {
+        gnupg_inhibit_set_foregound_window (1);
+      }
+
+
     if (cmd == aGPGConfTest)
       g10_exit(0);
 

sm/gpgsm.c

@@ -1737,6 +1737,14 @@ main ( int argc, char **argv)
   if (!cmd && opt.fingerprint && !with_fpr)
     set_cmd (&cmd, aListKeys);
 
+  /* If no pinentry is expected shunt
+   * gnupg_allow_set_foregound_window to avoid useless error
+   * messages on Windows.  */
+  if (opt.pinentry_mode != PINENTRY_MODE_ASK)
+    {
+      gnupg_inhibit_set_foregound_window (1);
+    }
+
   /* Add default keybox. */
   if (!nrings && default_keyring)
     {