agent: Stop scdaemon after reload when disable_scdaemon.

* agent/call-scd.c (agent_card_killscd): New.
* agent/gpg-agent.c (agent_sighup_action): Call agent_card_killscd.

--

GnuPG-bug-id: 4326
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

agent/agent.h

@@ -618,6 +618,7 @@ int agent_card_scd (ctrl_t ctrl, const char *cmdline,
 void agent_card_free_keyinfo (struct card_key_info_s *l);
 gpg_error_t agent_card_keyinfo (ctrl_t ctrl, const char *keygrip,
                                 struct card_key_info_s **result);
+void agent_card_killscd (void);
 
 
 /*-- learncard.c --*/

agent/call-scd.c

@@ -1515,3 +1515,12 @@ agent_card_scd (ctrl_t ctrl, const char *cmdline,
 
   return unlock_scd (ctrl, 0);
 }
+
+void
+agent_card_killscd (void)
+{
+  if (primary_scd_ctx == NULL)
+    return;
+  assuan_transact (primary_scd_ctx, "KILLSCD",
+                   NULL, NULL, NULL, NULL, NULL, NULL);
+}

agent/gpg-agent.c

@@ -2441,6 +2441,9 @@ agent_sighup_action (void)
      "pinentry" binary that one can be used in case the
      "pinentry-basic" fallback was in use.  */
   gnupg_module_name_flush_some ();
+
+  if (opt.disable_scdaemon)
+    agent_card_killscd ();
 }