File fix-upstream-userdb-constpointer.patch of Package dbus-1.16688

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File fix-upstream-userdb-constpointer.patch of Package dbus-1.16688

commit 6ee66ff7bcc91803111d950512f02651e664f74f
Author: Simon McVittie <smcv@collabora.com>
Date:   Tue Jun 30 19:13:17 2020 +0100

userdb: Make lookups return a const pointer
    
    This makes it more obvious that the returned pointer points to a
    struct owned by the userdb, which must not be freed or have its
    contents modified, and is only valid to dereference until the next
    modification to the userdb's underlying hash tables (which in practice
    means until the lock is released, because after that we have no
    guarantees about what might be going on in another thread).
    
    Signed-off-by: Simon McVittie <smcv@collabora.com>

Index: dbus-1.12.2/dbus/dbus-userdb-util.c
===================================================================
--- dbus-1.12.2.orig/dbus/dbus-userdb-util.c
+++ dbus-1.12.2/dbus/dbus-userdb-util.c
@@ -240,9 +240,9 @@ _dbus_get_user_id_and_primary_group (con
  * @param gid the group ID or #DBUS_GID_UNSET
  * @param groupname group name or #NULL 
  * @param error error to fill in
- * @returns the entry in the database
+ * @returns the entry in the database (borrowed, do not free)
  */
-DBusGroupInfo*
+const DBusGroupInfo *
 _dbus_user_database_lookup_group (DBusUserDatabase *db,
                                   dbus_gid_t        gid,
                                   const DBusString *groupname,
@@ -328,6 +328,8 @@ _dbus_user_database_lookup_group (DBusUs
           return NULL;
         }
       
+      /* Return a borrowed reference to the DBusGroupInfo owned by the
+       * two hash tables */
       return info;
     }
 }
Index: dbus-1.12.2/dbus/dbus-userdb.c
===================================================================
--- dbus-1.12.2.orig/dbus/dbus-userdb.c
+++ dbus-1.12.2/dbus/dbus-userdb.c
@@ -122,9 +122,9 @@ _dbus_is_a_number (const DBusString *str
  * @param uid the user ID or #DBUS_UID_UNSET
  * @param username username or #NULL 
  * @param error error to fill in
- * @returns the entry in the database
+ * @returns the entry in the database (borrowed, do not free)
  */
-DBusUserInfo*
+const DBusUserInfo *
 _dbus_user_database_lookup (DBusUserDatabase *db,
                             dbus_uid_t        uid,
                             const DBusString *username,
@@ -211,6 +211,8 @@ _dbus_user_database_lookup (DBusUserData
           return NULL;
         }
       
+      /* Return a borrowed pointer to the DBusUserInfo owned by the
+       * hash tables */
       return info;
     }
 }
Index: dbus-1.12.2/dbus/dbus-userdb.h
===================================================================
--- dbus-1.12.2.orig/dbus/dbus-userdb.h
+++ dbus-1.12.2/dbus/dbus-userdb.h
@@ -76,15 +76,15 @@ dbus_bool_t       _dbus_user_database_ge
                                                      DBusError            *error);
 
 DBUS_PRIVATE_EXPORT
-DBusUserInfo*  _dbus_user_database_lookup       (DBusUserDatabase *db,
+const DBusUserInfo *_dbus_user_database_lookup  (DBusUserDatabase *db,
                                                  dbus_uid_t        uid,
                                                  const DBusString *username,
                                                  DBusError        *error);
 DBUS_PRIVATE_EXPORT
-DBusGroupInfo* _dbus_user_database_lookup_group (DBusUserDatabase *db,
-                                                 dbus_gid_t        gid,
-                                                 const DBusString *groupname,
-                                                 DBusError        *error);
+const DBusGroupInfo* _dbus_user_database_lookup_group (DBusUserDatabase *db,
+                                                       dbus_gid_t        gid,
+                                                       const DBusString *groupname,
+                                                       DBusError        *error);
 DBUS_PRIVATE_EXPORT
 void           _dbus_user_info_free_allocated   (DBusUserInfo     *info);
 DBUS_PRIVATE_EXPORT

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File fix-upstream-userdb-constpointer.patch of Package dbus-1.16688

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