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- .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
- .. c:namespace:: RC
- .. _lirc_set_transmitter_mask:
- *******************************
- ioctl LIRC_SET_TRANSMITTER_MASK
- *******************************
- Name
- ====
- LIRC_SET_TRANSMITTER_MASK - Enables send codes on a given set of transmitters
- Synopsis
- ========
- .. c:macro:: LIRC_SET_TRANSMITTER_MASK
- ``int ioctl(int fd, LIRC_SET_TRANSMITTER_MASK, __u32 *mask)``
- Arguments
- =========
- ``fd``
- File descriptor returned by open().
- ``mask``
- Mask with channels to enable tx. Channel 0 is the least significant bit.
- Description
- ===========
- Some IR TX devices have multiple output channels, in such case,
- :ref:`LIRC_CAN_SET_TRANSMITTER_MASK <LIRC-CAN-SET-TRANSMITTER-MASK>` is
- returned via :ref:`LIRC_GET_FEATURES` and this ioctl sets what channels will
- send IR codes.
- This ioctl enables the given set of transmitters. The first transmitter is
- encoded by the least significant bit and so on.
- When an invalid bit mask is given, i.e. a bit is set, even though the device
- does not have so many transitters, then this ioctl returns the number of
- available transitters and does nothing otherwise.
- Return Value
- ============
- On success 0 is returned, on error -1 and the ``errno`` variable is set
- appropriately. The generic error codes are described at the
- :ref:`Generic Error Codes <gen-errors>` chapter.
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