g10: Suppress error for card availability check.

* g10/call-agent.c (start_agent): Add semantics for card; Suppress
error for card check.
(warn_version_mismatch): Ignore an error for scdaemon.
(agent_scd_serialno): Call start_agent with
FLAG_FOR_CARD_SUPPRESS_ERRORS.

--

GnuPG-bug-id: 3165
Fixes-commit: 97a2394ecafaa6f58e4a1f70ecfd04408dc15606
Signed-off-by: NIIBE Yutaka <[email protected]>

1 files changed, 9 insertions, 6 deletions

diff --git a/g10/call-agent.c b/g10/call-agent.c
index be8c33d74..4698a25a7 100644
--- a/g10/call-agent.c
+++ b/g10/call-agent.c
@@ -184,7 +184,8 @@ default_inq_cb (void *opaque, const char *line)
 
 
 /* Print a warning if the server's version number is less than our
-   version number.  Returns an error code on a connection problem.  */
+   version number.  Returns an error code on a connection problem.
+   Ignore an error for scdaemon (MODE==2).  */
 static gpg_error_t
 warn_version_mismatch (assuan_context_t ctx, const char *servername, int mode)
 {
@@ -193,7 +194,7 @@ warn_version_mismatch (assuan_context_t ctx, const char *servername, int mode)
   const char *myversion = strusage (13);
 
   err = get_assuan_server_version (ctx, mode, &serverversion);
-  if (err)
+  if (err && mode != 2)
     log_error (_("error getting version from '%s': %s\n"),
                servername, gpg_strerror (err));
   else if (compare_version_strings (serverversion, myversion) < 0)
@@ -217,10 +218,12 @@ warn_version_mismatch (assuan_context_t ctx, const char *servername, int mode)
 }
 
 
+#define FLAG_FOR_CARD_SUPPRESS_ERRORS 2
+
 /* Try to connect to the agent via socket or fork it off and work by
    pipes.  Handle the server's initial greeting */
 static int
-start_agent (ctrl_t ctrl, int for_card)
+start_agent (ctrl_t ctrl, int flag_for_card)
 {
   int rc;
 
@@ -280,7 +283,7 @@ start_agent (ctrl_t ctrl, int for_card)
         }
     }
 
-  if (!rc && for_card && !did_early_card_test)
+  if (!rc && flag_for_card && !did_early_card_test)
     {
       /* Request the serial number of the card for an early test.  */
       struct agent_card_info_s info;
@@ -292,7 +295,7 @@ start_agent (ctrl_t ctrl, int for_card)
         rc = assuan_transact (agent_ctx, "SCD SERIALNO openpgp",
                               NULL, NULL, NULL, NULL,
                               learn_status_cb, &info);
-      if (rc)
+      if (rc && !(flag_for_card & FLAG_FOR_CARD_SUPPRESS_ERRORS))
         {
           switch (gpg_err_code (rc))
             {
@@ -1023,7 +1026,7 @@ agent_scd_serialno (char **r_serialno, const char *demand)
   char *serialno = NULL;
   char line[ASSUAN_LINELENGTH];
 
-  err = start_agent (NULL, 1);
+  err = start_agent (NULL, 1 | FLAG_FOR_CARD_SUPPRESS_ERRORS);
   if (err)
     return err;