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

@@ -597,6 +597,7 @@ int agent_card_scd (ctrl_t ctrl, const char *cmdline,
                     int (*getpin_cb)(void *, const char *,
                                      const char *, char*, size_t),
                     void *getpin_cb_arg, void *assuan_context);
+void agent_card_killscd (void);
 
 
 /*-- learncard.c --*/

agent/call-scd.c

@@ -1324,3 +1324,12 @@ 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

@@ -2434,6 +2434,9 @@ 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 ();
 }