sm: Avoid warnings about useless assignments.

* sm/call-dirmngr.c (prepare_dirmngr): Remove setting of ERR.
(unhexify_fpr): Remove useless computation on N.
* sm/certchain.c (do_validate_chain): Remove clearing of RC.  Remove
useless setting of RC.
* sm/fingerprint.c (gpgsm_get_keygrip): Remove setting of RC.
* sm/gpgsm.c (build_list): Replace final stpcpy by strcpy.
* sm/keydb.c (keydb_clear_some_cert_flags): Remove clearing of RC.
* sm/server.c (cmd_getauditlog): Comment unused skip_options.

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

sm/call-dirmngr.c

@@ -181,9 +181,11 @@ prepare_dirmngr (ctrl_t ctrl, assuan_context_t ctx, gpg_error_t err)
 		server->host, server->port, user, pass, base);
       line[DIM (line) - 1] = 0;
 
-      err = assuan_transact (ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
-      if (gpg_err_code (err) == GPG_ERR_ASS_UNKNOWN_CMD)
-	err = 0;  /* Allow the use of old dirmngr versions.  */
+      assuan_transact (ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
+      /* The code below is not required becuase we don't return an error.  */
+      /* err = [above call]  */
+      /* if (gpg_err_code (err) == GPG_ERR_ASS_UNKNOWN_CMD) */
+      /*   err = 0;  /\* Allow the use of old dirmngr versions.  *\/ */
 
       server = server->next;
     }
@@ -402,7 +404,6 @@ unhexify_fpr (const char *hexstr, unsigned char *fpr)
     ;
   if (*s || (n != 40))
     return 0; /* no fingerprint (invalid or wrong length). */
-  n /= 2;
   for (s=hexstr, n=0; *s; s += 2, n++)
     fpr[n] = xtoi_2 (s);
   return 1; /* okay */

sm/certchain.c

@@ -405,7 +405,9 @@ check_cert_policy (ksba_cert_t cert, int listmode, estream_t fplist)
         }
       while (!*p || *p == '\n' || *p == '#');
 
-      /* parse line */
+      /* Parse line.  Note that the line has always a LF and spacep
+         does not consider a LF a space.  Thus strpbrk will always
+         succeed.  */
       for (allowed=line; spacep (allowed); allowed++)
         ;
       p = strpbrk (allowed, " :\n");
@@ -1389,10 +1391,7 @@ do_validate_chain (ctrl_t ctrl, ksba_cert_t cert, ksba_isotime_t checktime_arg,
                                     exptime, listmode, listfp,
                                     (depth && is_root)? -1: depth);
       if (gpg_err_code (rc) == GPG_ERR_CERT_EXPIRED)
-        {
-          any_expired = 1;
-          rc = 0;
-        }
+        any_expired = 1;
       else if (rc)
         goto leave;
 
@@ -1409,7 +1408,7 @@ do_validate_chain (ctrl_t ctrl, ksba_cert_t cert, ksba_isotime_t checktime_arg,
           if (gpg_err_code (rc) == GPG_ERR_NO_POLICY_MATCH)
             {
               any_no_policy_match = 1;
-              rc = 1;
+              rc = 1;  /* Be on the safe side and set RC.  */
             }
           else if (rc)
             goto leave;
@@ -1612,7 +1611,8 @@ do_validate_chain (ctrl_t ctrl, ksba_cert_t cert, ksba_isotime_t checktime_arg,
                       /* The find next did not work or returned an
                          identical certificate.  We better stop here
                          to avoid infinite checks. */
-                      rc = gpg_error (GPG_ERR_BAD_SIGNATURE);
+                      /* No need to set RC because it is not used:
+                         rc = gpg_error (GPG_ERR_BAD_SIGNATURE);  */
                       ksba_cert_release (tmp_cert);
                     }
                   else

sm/fingerprint.c

@@ -192,7 +192,6 @@ gpgsm_get_keygrip (ksba_cert_t cert, unsigned char *array)
   gcry_sexp_release (s_pkey);
   if (!array)
     {
-      rc = gpg_error (GPG_ERR_GENERAL);
       log_error ("can't calculate keygrip\n");
       return NULL;
     }

sm/gpgsm.c

@@ -630,7 +630,7 @@ build_list (const char *text, const char * (*mapf)(int), int (*chkf)(int))
 	}
     }
   if (p)
-    p = stpcpy(p, "\n" );
+    strcpy (p, "\n" );
   return list;
 }
 

sm/keydb.c

@@ -1291,11 +1291,7 @@ keydb_clear_some_cert_flags (ctrl_t ctrl, strlist_t names)
         {
           rc = classify_user_id (sl->d, desc+ndesc, 0);
           if (rc)
-            {
-              log_error ("key '%s' not found: %s\n",
-                         sl->d, gpg_strerror (rc));
-              rc = 0;
-            }
+            log_error ("key '%s' not found: %s\n", sl->d, gpg_strerror (rc));
           else
             ndesc++;
         }

sm/server.c

@@ -1083,7 +1083,7 @@ cmd_getauditlog (assuan_context_t ctx, char *line)
 
   opt_data = has_option (line, "--data");
   opt_html = has_option (line, "--html");
-  line = skip_options (line);
+  /* Not needed: line = skip_options (line); */
 
   if (!ctrl->audit)
     return gpg_error (GPG_ERR_NO_DATA);