diff -r a49d313a28ae Doc/library/fcntl.rst --- a/Doc/library/fcntl.rst Tue Oct 08 21:08:48 2013 +0300 +++ b/Doc/library/fcntl.rst Tue Oct 08 22:49:24 2013 +0300 @@ -1,5 +1,5 @@ -:mod:`fcntl` --- The :func:`fcntl` and :func:`ioctl` system calls -================================================================= +:mod:`fcntl` --- The :c:func:`fcntl` and :c:func:`ioctl` system calls +===================================================================== .. module:: fcntl :platform: Unix @@ -17,7 +17,8 @@ All functions in this module take a file descriptor *fd* as their first argument. This can be an integer file descriptor, such as returned by ``sys.stdin.fileno()``, or a :class:`io.IOBase` object, such as ``sys.stdin`` -itself, which provides a :meth:`fileno` that returns a genuine file descriptor. +itself, which provides a :meth:`~io.IOBase.fileno` that returns a genuine file +descriptor. .. versionchanged:: 3.3 Operations in this module used to raise a :exc:`IOError` where they now @@ -30,7 +31,8 @@ .. function:: fcntl(fd, op[, arg]) Perform the requested operation on file descriptor *fd* (file objects providing - a :meth:`fileno` method are accepted as well). The operation is defined by *op* + a :meth:`~io.IOBase.fileno` method are accepted as well). The operation is + defined by *op* and is operating system dependent. These codes are also found in the :mod:`fcntl` module. The argument *arg* is optional, and defaults to the integer value ``0``. When present, it can either be an integer value, or a string. @@ -50,8 +52,8 @@ .. function:: ioctl(fd, op[, arg[, mutate_flag]]) - This function is identical to the :func:`fcntl` function, except that the - argument handling is even more complicated. + This function is identical to the :func:`~fcntl.fcntl` function, except + that the argument handling is even more complicated. The op parameter is limited to values that can fit in 32-bits. @@ -59,7 +61,8 @@ integer ``0``), an object supporting the read-only buffer interface (most likely a plain Python string) or an object supporting the read-write buffer interface. - In all but the last case, behaviour is as for the :func:`fcntl` function. + In all but the last case, behaviour is as for the :func:`~fcntl.fcntl` + function. If a mutable buffer is passed, then the behaviour is determined by the value of the *mutate_flag* parameter. @@ -94,16 +97,16 @@ .. function:: flock(fd, op) Perform the lock operation *op* on file descriptor *fd* (file objects providing - a :meth:`fileno` method are accepted as well). See the Unix manual + a :meth:`~io.IOBase.fileno` method are accepted as well). See the Unix manual :manpage:`flock(2)` for details. (On some systems, this function is emulated using :c:func:`fcntl`.) .. function:: lockf(fd, operation, [length, [start, [whence]]]) - This is essentially a wrapper around the :func:`fcntl` locking calls. *fd* is - the file descriptor of the file to lock or unlock, and *operation* is one of the - following values: + This is essentially a wrapper around the :func:`~fcntl.fcntl` locking calls. + *fd* is the file descriptor of the file to lock or unlock, and *operation* + is one of the following values: * :const:`LOCK_UN` -- unlock * :const:`LOCK_SH` -- acquire a shared lock @@ -118,13 +121,13 @@ systems, :const:`LOCK_EX` can only be used if the file descriptor refers to a file opened for writing. - *length* is the number of bytes to lock, *start* is the byte offset at which the - lock starts, relative to *whence*, and *whence* is as with :func:`fileobj.seek`, - specifically: + *length* is the number of bytes to lock, *start* is the byte offset at + which the lock starts, relative to *whence*, and *whence* is as with + :func:`io.IOBase.seek`, specifically: - * :const:`0` -- relative to the start of the file (:const:`SEEK_SET`) - * :const:`1` -- relative to the current buffer position (:const:`SEEK_CUR`) - * :const:`2` -- relative to the end of the file (:const:`SEEK_END`) + * :const:`0` -- relative to the start of the file (:const:`os.SEEK_SET`) + * :const:`1` -- relative to the current buffer position (:const:`os.SEEK_CUR`) + * :const:`2` -- relative to the end of the file (:const:`os.SEEK_END`) The default for *start* is 0, which means to start at the beginning of the file. The default for *length* is 0 which means to lock to the end of the file. The @@ -149,7 +152,8 @@ .. seealso:: Module :mod:`os` - If the locking flags :const:`O_SHLOCK` and :const:`O_EXLOCK` are present - in the :mod:`os` module (on BSD only), the :func:`os.open` function - provides an alternative to the :func:`lockf` and :func:`flock` functions. + If the locking flags :const:`~os.O_SHLOCK` and :const:`~os.O_EXLOCK` are + present in the :mod:`os` module (on BSD only), the :func:`os.open` + function provides an alternative to the :func:`lockf` and :func:`flock` + functions.