gpg: Do not require a trustdb with --always-trust.

* g10/tdbio.c (tdbio_set_dbname): Add arg R_NOFILE.
* g10/trustdb.c (trustdb_args): Add field no_trustdb.
(init_trustdb): Set that field.
(revalidation_mark):  Take care of a nonexistent trustdb file.
(read_trust_options): Ditto.
(tdb_get_ownertrust): Ditto.
(tdb_get_min_ownertrust): Ditto.
(tdb_update_ownertrust): Ditto.
(update_min_ownertrust): Ditto.
(tdb_clear_ownertrusts): Ditto.
(tdb_cache_disabled_value): Ditto.
(tdb_check_trustdb_stale): Ditto.
(tdb_get_validity_core): Ditto.
* g10/gpg.c (main): Do not create a trustdb with most commands for
trust-model always.
--

This slightly changes the semantics of most commands in that they
won't create a trustdb if --trust-model=always is used.  It just does
not make sense to create a trustdb if there is no need for it.

Signed-off-by: Werner Koch <[email protected]>
(cherry picked from commit 1a0eeaacd1bf09fe5125dbc3f56016bc20f3512e)

Resolved conflicts:
	NEWS
	g10/trustdb.c: Manually apply changes due to changed
                       function names.

Note that this also includes the fix for clear_ownertrust, see
GnuPG-bug-id: 1622.

1 files changed, 1 insertions, 5 deletions

diff --git a/g10/gpg.c b/g10/gpg.c
index 15cbe4bcc..65a9cab99 100644
--- a/g10/gpg.c
+++ b/g10/gpg.c
@@ -3539,15 +3539,11 @@ main (int argc, char **argv)
       case aListTrustDB:
         rc = setup_trustdb (argc? 1:0, trustdb_name);
         break;
-      case aEncr:
-      case aEncrFiles:
+      default:
         /* If we are using TM_ALWAYS, we do not need to create the
            trustdb.  */
         rc = setup_trustdb (opt.trust_model != TM_ALWAYS, trustdb_name);
         break;
-      default:
-        rc = setup_trustdb (1, trustdb_name );
-        break;
       }
     if (rc)
       log_error (_("failed to initialize the TrustDB: %s\n"), g10_errstr(rc));