g13: Second chunk of code to support dm-crypt.

* g13/be-dmcrypt.c, g13/be-dmcrypt.h: New.
* g13/Makefile.am (g13_SOURCES): Add them.
* g13/backend.c: Include be-dmcrypt.h and call-syshelp.h.
(no_such_backend): Rename to _no_such_backend and provide replacement
macro.
(be_is_supported_conttype): Support DM-Crypt.
(be_take_lock_for_create): Call set_segvice for DM-Crypt.
(be_create_new_keys): Make it a dummy for DM-Crypt.
(be_create_container): Call be_dmcrypt_create_container.
(be_mount_container): call be_dmcrypt_mount_container.
* g13/g13-syshelp.c (main): Enable verbose mode.
* g13/g13tuple.c (get_tupledesc_data): New.
* g13/g13tuple.h (unref_tupledesc): New.
* g13/g13.h (server_control_): Add field "recipients".
* g13/g13.c (main): Fix setting of recipients via cmdline.
(g13_deinit_default_ctrl): Release recipients list.
(g13_request_shutdown): New.  Replace all direct update of
shutdown_pending by calls this function.
* g13/server.c (server_local_s): Remove field recipients which is now
part of CTRL.
(reset_notify, cmd_recipient, cmd_create): Adjust for this change.
* g13/create.c (encrypt_keyblob): Rename to g13_encrypt_keyblob.
(g13_create_container): Support DM-Crypt.
* g13/mount.c (parse_header): Allow for meta data copies.
(g13_mount_container): Support DM-Crypt.
* g13/sh-cmd.c (cmd_create): Make it work.
(cmd_mount): New.
* g13/sh-dmcrypt.c (sh_dmcrypt_create_container): Make it work.
(sh_dmcrypt_mount_container): New.
--

With this patch we can now create an encrypted partition and partly
mount it (i.e. setup keys and create the mapped device). We do not yet
create a file system or mount that file system

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

g13/g13.c

@@ -459,7 +459,7 @@ main ( int argc, char **argv)
           if (default_config)
             {
               if (parse_debug)
-                log_info (_("NOTE: no default option file '%s'\n"), configname);
+                log_info (_("Note: no default option file '%s'\n"), configname);
             }
           else
             {
@@ -625,6 +625,8 @@ main ( int argc, char **argv)
   /* Now that we have the options parsed we need to update the default
      control structure.  */
   g13_init_default_ctrl (&ctrl);
+  ctrl.recipients = recipients;
+  recipients = NULL;
 
   if (nogreeting)
     greeting = 0;
@@ -646,7 +648,7 @@ main ( int argc, char **argv)
 
       for (i=0; i < argc; i++)
         if (argv[i][0] == '-' && argv[i][1] == '-')
-          log_info (_("NOTE: '%s' is not considered an option\n"), argv[i]);
+          log_info (_("Note: '%s' is not considered an option\n"), argv[i]);
     }
 
 
@@ -698,7 +700,7 @@ main ( int argc, char **argv)
       strlist_t sl;
       int failed = 0;
 
-      for (sl = recipients; sl; sl = sl->next)
+      for (sl = ctrl->recipients; sl; sl = sl->next)
         if (check_encryption_key ())
           failed = 1;
       if (failed)
@@ -738,7 +740,7 @@ main ( int argc, char **argv)
           log_error ("server exited with error: %s <%s>\n",
                      gpg_strerror (err), gpg_strsource (err));
         else
-          shutdown_pending++;
+          g13_request_shutdown ();
       }
       break;
 
@@ -747,12 +749,12 @@ main ( int argc, char **argv)
         if (argc != 1)
           wrong_args ("--create filename");
         start_idle_task ();
-        err = g13_create_container (&ctrl, argv[0], recipients);
+        err = g13_create_container (&ctrl, argv[0]);
         if (err)
           log_error ("error creating a new container: %s <%s>\n",
                      gpg_strerror (err), gpg_strsource (err));
         else
-          shutdown_pending++;
+          g13_request_shutdown ();
       }
       break;
 
@@ -797,6 +799,16 @@ void
 g13_deinit_default_ctrl (ctrl_t ctrl)
 {
   call_syshelp_release (ctrl);
+  FREE_STRLIST (ctrl->recipients);
+}
+
+
+/* Request a shutdown.  This can be used when the process should
+ * finish instead of running the idle task.  */
+void
+g13_request_shutdown (void)
+{
+  shutdown_pending++;
 }
 
 
@@ -932,9 +944,11 @@ idle_task (void *dummy_arg)
 	}
 
       if (ret <= 0)
-	/* Interrupt or timeout.  Will be handled when calculating the
-	   next timeout.  */
-	continue;
+        {
+          /* Interrupt or timeout.  Will be handled when calculating the
+             next timeout.  */
+          continue;
+        }
 
       /* Here one would add processing of file descriptors.  */
     }