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authorMauro Carvalho Chehab <mchehab@s-opensource.com>2016-07-12 09:35:26 -0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2016-07-12 09:43:04 -0300
commitbd6a63f2e69ea16851a99b200cd2039186173775 (patch)
tree847ea21e7790244cc946d1d551658888714e28be /Documentation/media/uapi/rc/lirc-write.rst
parent048eb3ef7580ef5dd64c74a319e58b1c8568ed68 (diff)
[media] doc-rst: reorganize LIRC ReST files
Reorganize the LIRC rst files, using "-" instead of "_" on their names, and creating a separate chapter for syscalls. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _lirc-write:
+
+************
+LIRC write()
+************
+
+Name
+====
+
+lirc-write - Write to a LIRC device
+
+
+Synopsis
+========
+
+.. code-block:: c
+
+ #include <unistd.h>
+
+
+.. cpp:function:: ssize_t write( int fd, void *buf, size_t count )
+
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by ``open()``.
+
+``buf``
+``count``
+
+
+Description
+===========
+
+:ref:`write() <lirc-write>` writes up to ``count`` bytes to the device
+referenced by the file descriptor ``fd`` from the buffer starting at
+``buf``.
+
+The data written to the chardev is a pulse/space sequence of integer
+values. Pulses and spaces are only marked implicitly by their position.
+The data must start and end with a pulse, therefore, the data must
+always include an uneven number of samples. The write function must
+block until the data has been transmitted by the hardware. If more data
+is provided than the hardware can send, the driver returns ``EINVAL``.
+
+
+Return Value
+============
+
+On success, the number of bytes read is returned. It is not an error if
+this number is smaller than the number of bytes requested, or the amount
+of data required for one frame. On error, -1 is returned, and the ``errno``
+variable is set appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.