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+PR_Sync
+=======
+
+Synchronizes any buffered data for a file descriptor to its backing
+device (disk).
+
+
+Syntax
+------
+
+.. code::
+
+   #include <prio.h>
+
+   PRStatus PR_Sync(PRFileDesc *fd);
+
+
+Parameter
+~~~~~~~~~
+
+The function has the following parameter:
+
+``fd``
+   Pointer to a :ref:`PRFileDesc` object representing a file.
+
+
+Returns
+~~~~~~~
+
+The function returns one of the following values:
+
+-  On successful completion, ``PR_SUCCESS``.
+-  If the function fails, ``PR_FAILURE``.
+
+
+Description
+-----------
+
+:ref:`PR_Sync` writes all the in-memory buffered data of the specified file
+to the disk.