agent: New function agent_print_status.

* common/asshelp2.c (vprint_assuan_status): New.
(print_assuan_status): Re-implement using above func.
* agent/command.c (agent_print_status): New.

agent/agent.h

@@ -288,6 +288,9 @@ int map_pk_openpgp_to_gcry (int openpgp_algo);
 gpg_error_t agent_inq_pinentry_launched (ctrl_t ctrl, unsigned long pid);
 gpg_error_t agent_write_status (ctrl_t ctrl, const char *keyword, ...)
      GNUPG_GCC_A_SENTINEL(0);
+gpg_error_t agent_print_status (ctrl_t ctrl, const char *keyword,
+                                const char *format, ...)
+     JNLIB_GCC_A_PRINTF(3,4);
 void bump_key_eventcounter (void);
 void bump_card_eventcounter (void);
 void start_command_handler (ctrl_t, gnupg_fd_t, gnupg_fd_t);

agent/command.c

@@ -413,6 +413,22 @@ agent_write_status (ctrl_t ctrl, const char *keyword, ...)
 }
 
 
+/* This function is similar to print_assuan_status but takes a CTRL
+   arg instead of an assuan context as first argument.  */
+gpg_error_t
+agent_print_status (ctrl_t ctrl, const char *keyword, const char *format, ...)
+{
+  gpg_error_t err;
+  va_list arg_ptr;
+  assuan_context_t ctx = ctrl->server_local->assuan_ctx;
+
+  va_start (arg_ptr, format);
+  err = vprint_assuan_status (ctx, keyword, format, arg_ptr);
+  va_end (arg_ptr);
+  return err;
+}
+
+
 /* Helper to notify the client about a launched Pinentry.  Because
    that might disturb some older clients, this is only done if enabled
    via an option.  Returns an gpg error code. */

common/asshelp.h

@@ -72,6 +72,10 @@ gpg_error_t print_assuan_status (assuan_context_t ctx,
                                  const char *keyword,
                                  const char *format,
                                  ...) JNLIB_GCC_A_PRINTF(3,4);
+gpg_error_t vprint_assuan_status (assuan_context_t ctx,
+                                  const char *keyword,
+                                  const char *format,
+                                  va_list arg_ptr) JNLIB_GCC_A_PRINTF(3,0);
 
 
 #endif /*GNUPG_COMMON_ASSHELP_H*/

common/asshelp2.c

@@ -30,20 +30,34 @@
 /* Helper function to print an assuan status line using a printf
    format string.  */
 gpg_error_t
-print_assuan_status (assuan_context_t ctx,
+vprint_assuan_status (assuan_context_t ctx,
                       const char *keyword,
-                     const char *format, ...)
+                      const char *format, va_list arg_ptr)
 {
-  va_list arg_ptr;
   int rc;
   char *buf;
 
-  va_start (arg_ptr, format);
   rc = estream_vasprintf (&buf, format, arg_ptr);
-  va_end (arg_ptr);
   if (rc < 0)
     return gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
   rc = assuan_write_status (ctx, keyword, buf);
   xfree (buf);
   return rc;
 }
+
+
+/* Helper function to print an assuan status line using a printf
+   format string.  */
+gpg_error_t
+print_assuan_status (assuan_context_t ctx,
+                     const char *keyword,
+                     const char *format, ...)
+{
+  va_list arg_ptr;
+  gpg_error_t err;
+
+  va_start (arg_ptr, format);
+  err = vprint_assuan_status (ctx, keyword, format, arg_ptr);
+  va_end (arg_ptr);
+  return err;
+}