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.. -*- coding: utf-8; mode: rst -*-
.. _audio_fopen:
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=======================
Digital TV audio open()
=======================
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Name
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----
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Digital TV audio open()
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.. attention :: This ioctl is deprecated
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Synopsis
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--------
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.. c:function :: int open(const char *deviceName, int flags)
:name: dvb-audio-open
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Arguments
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---------
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.. flat-table ::
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- .. row 1
- const char \*deviceName
- Name of specific audio device.
- .. row 2
- int flags
- A bit-wise OR of the following flags:
- .. row 3
-
- O_RDONLY read-only access
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-
- O_RDWR read/write access
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-
- O_NONBLOCK open in non-blocking mode
- .. row 6
-
- (blocking mode is the default)
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Description
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-----------
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This system call opens a named audio device (e.g.
/dev/dvb/adapter0/audio0) for subsequent use. When an open() call has
succeeded, the device will be ready for use. The significance of
blocking or non-blocking mode is described in the documentation for
functions where there is a difference. It does not affect the semantics
of the open() call itself. A device opened in blocking mode can later be
put into non-blocking mode (and vice versa) using the F_SETFL command
of the fcntl system call. This is a standard system call, documented in
the Linux manual page for fcntl. Only one user can open the Audio Device
in O_RDWR mode. All other attempts to open the device in this mode will
fail, and an error code will be returned. If the Audio Device is opened
in O_RDONLY mode, the only ioctl call that can be used is
AUDIO_GET_STATUS. All other call will return with an error code.
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Return Value
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------------
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.. tabularcolumns :: |p{2.5cm}|p{15.0cm}|
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.. flat-table ::
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- .. row 1
- `` ENODEV ``
- Device driver not loaded/available.
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- `` EBUSY ``
- Device or resource busy.
- .. row 3
- `` EINVAL ``
- Invalid argument.