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bpo-37129: Add os.RWF_APPEND flag for os.pwritev() (GH-20336)

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YoSTEALTH 2020-05-27 15:32:22 -06:00 • committed by GitHub
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Doc/library/os.rst
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@ -1211,6 +1211,7 @@ or `the MSDN <https://msdn.microsoft.com/en-us/library/z0kc8e3z.aspx>`_ on Windo
- :data:`RWF_DSYNC`
- :data:`RWF_SYNC`
- :data:`RWF_APPEND`
Return the total number of bytes actually written.
@ -1228,8 +1229,8 @@ or `the MSDN <https://msdn.microsoft.com/en-us/library/z0kc8e3z.aspx>`_ on Windo
.. data:: RWF_DSYNC
Provide a per-write equivalent of the :data:`O_DSYNC` ``open(2)`` flag. This
flag effect applies only to the data range written by the system call.
Provide a per-write equivalent of the :data:`O_DSYNC` :func:`os.open` flag.
This flag effect applies only to the data range written by the system call.
.. availability:: Linux 4.7 and newer.
@ -1238,14 +1239,28 @@ or `the MSDN <https://msdn.microsoft.com/en-us/library/z0kc8e3z.aspx>`_ on Windo
.. data:: RWF_SYNC
Provide a per-write equivalent of the :data:`O_SYNC` ``open(2)`` flag. This
flag effect applies only to the data range written by the system call.
Provide a per-write equivalent of the :data:`O_SYNC` :func:`os.open` flag.
This flag effect applies only to the data range written by the system call.
.. availability:: Linux 4.7 and newer.
.. versionadded:: 3.7
.. data:: RWF_APPEND
Provide a per-write equivalent of the :data:`O_APPEND` :func:`os.open`
flag. This flag is meaningful only for :func:`os.pwritev`, and its
effect applies only to the data range written by the system call. The
*offset* argument does not affect the write operation; the data is always
appended to the end of the file. However, if the *offset* argument is
``-1``, the current file *offset* is updated.
.. availability:: Linux 4.16 and newer.
.. versionadded:: 3.10
.. function:: read(fd, n)
Read at most *n* bytes from file descriptor *fd*.