DOCS-10737: server parameter honorSystemUmask

Author: steveren

source/reference/parameters.txt

@@ -1251,6 +1251,32 @@ Storage Parameters
    .. seealso:: :setting:`~storage.syncPeriodSecs` and
       :parameter:`journalCommitInterval`.
 
+.. parameter:: honorSystemUmask
+
+   .. versionadded:: 3.6
+
+   *Default*: ``false``
+
+   If :parameter:`honorSystemUmask` is set to ``true``, new files
+   created by MongoDB have permissions in accordance with the
+   user's ``umask`` settings.
+
+   If :parameter:`honorSystemUmask` is set to ``false``, new files
+   created by MongoDB have permissions set to ``600``, which gives
+   read and write permissions only to the owner. New directories have
+   permissions set to ``700``.
+
+   You can only set this parameter during start-up and cannot change
+   this setting using the :dbcommand:`setParameter` database command.
+
+   .. code-block:: sh
+
+      mongod --setParameter honorSystemUmask=true
+
+   .. note::
+
+      :parameter:`honorSystemUmask` is not available on Windows systems.
+
 WiredTiger Parameters
 ~~~~~~~~~~~~~~~~~~~~~