_dbus_server_init_base: raise a DBusError

This can currently only fail from OOM, but I'm about to make
it possible to fail from insufficient entropy.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=90414
Reviewed-by: Ralf Habacker <ralf.habacker@freenet.de>
[smcv: document @error]
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>

4 files changed, 24 insertions, 14 deletions

diff --git a/dbus/dbus-server-debug-pipe.c b/dbus/dbus-server-debug-pipe.c
index a7abe058..ca0be876 100644
--- a/dbus/dbus-server-debug-pipe.c
+++ b/dbus/dbus-server-debug-pipe.c
@@ -166,8 +166,9 @@ _dbus_server_debug_pipe_new (const char     *server_name,
     goto nomem_2;
   
   if (!_dbus_server_init_base (&debug_server->base,
-			       &debug_vtable, &address))
-    goto nomem_3;
+			       &debug_vtable, &address,
+                               error))
+    goto fail_3;
 
   if (!_dbus_hash_table_insert_string (server_pipe_hash,
 				       debug_server->name,
@@ -183,7 +184,7 @@ _dbus_server_debug_pipe_new (const char     *server_name,
 
  nomem_4:
   _dbus_server_finalize_base (&debug_server->base);
- nomem_3:
+ fail_3:
   dbus_free (debug_server->name);
  nomem_2:
   _dbus_string_free (&address);
@@ -191,7 +192,8 @@ _dbus_server_debug_pipe_new (const char     *server_name,
   dbus_free (debug_server);
  nomem_0:
   pipe_hash_unref ();
-  dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+  if (error != NULL && !dbus_error_is_set (error))
+    _DBUS_SET_OOM (error);
   return NULL;
 }
 
diff --git a/dbus/dbus-server-protected.h b/dbus/dbus-server-protected.h
index 44f53eeb..f613bf34 100644
--- a/dbus/dbus-server-protected.h
+++ b/dbus/dbus-server-protected.h
@@ -93,7 +93,8 @@ struct DBusServer
 
 dbus_bool_t _dbus_server_init_base      (DBusServer             *server,
                                          const DBusServerVTable *vtable,
-                                         const DBusString       *address);
+                                         const DBusString       *address,
+                                         DBusError              *error);
 void        _dbus_server_finalize_base  (DBusServer             *server);
 dbus_bool_t _dbus_server_add_watch      (DBusServer             *server,
                                          DBusWatch              *watch);
diff --git a/dbus/dbus-server-socket.c b/dbus/dbus-server-socket.c
index cf28b7cc..d716f500 100644
--- a/dbus/dbus-server-socket.c
+++ b/dbus/dbus-server-socket.c
@@ -324,7 +324,8 @@ _dbus_server_new_for_socket (DBusSocket       *fds,
     }
 
   if (!_dbus_server_init_base (&socket_server->base,
-                               &socket_vtable, address))
+                               &socket_vtable, address,
+                               error))
     goto failed_2;
 
   server = (DBusServer*)socket_server;
diff --git a/dbus/dbus-server.c b/dbus/dbus-server.c
index 7b810792..42891bde 100644
--- a/dbus/dbus-server.c
+++ b/dbus/dbus-server.c
@@ -105,12 +105,14 @@ copy_address_with_guid_appended (const DBusString *address,
  * @param server the server.
  * @param vtable the vtable for the subclass.
  * @param address the server's address
+ * @param error location to store reason for failure
  * @returns #TRUE on success.
  */
 dbus_bool_t
 _dbus_server_init_base (DBusServer             *server,
                         const DBusServerVTable *vtable,
-                        const DBusString       *address)
+                        const DBusString       *address,
+                        DBusError              *error)
 {
   server->vtable = vtable;
 
@@ -130,29 +132,32 @@ _dbus_server_init_base (DBusServer             *server,
   server->published_address = FALSE;
 
   if (!_dbus_string_init (&server->guid_hex))
-    return FALSE;
+    {
+      _DBUS_SET_OOM (error);
+      return FALSE;
+    }
 
   _dbus_generate_uuid (&server->guid);
 
   if (!_dbus_uuid_encode (&server->guid, &server->guid_hex))
-    goto failed;
+    goto oom;
   
   server->address = copy_address_with_guid_appended (address,
                                                      &server->guid_hex);
   if (server->address == NULL)
-    goto failed;
+    goto oom;
   
   _dbus_rmutex_new_at_location (&server->mutex);
   if (server->mutex == NULL)
-    goto failed;
+    goto oom;
   
   server->watches = _dbus_watch_list_new ();
   if (server->watches == NULL)
-    goto failed;
+    goto oom;
 
   server->timeouts = _dbus_timeout_list_new ();
   if (server->timeouts == NULL)
-    goto failed;
+    goto oom;
 
   _dbus_data_slot_list_init (&server->slot_list);
 
@@ -160,7 +165,8 @@ _dbus_server_init_base (DBusServer             *server,
   
   return TRUE;
 
- failed:
+ oom:
+  _DBUS_SET_OOM (error);
   _dbus_rmutex_free_at_location (&server->mutex);
   server->mutex = NULL;
   if (server->watches)