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.. -*- coding: utf-8; mode: rst -*-
.. _ca_fopen:
=============
DVB CA open()
=============
Name
----
DVB CA open()
Synopsis
--------
.. c:function:: int open(const char *name, int flags)
:name: dvb-ca-open
Arguments
---------
``name``
Name of specific DVB CA device.
``flags``
A bit-wise OR of the following flags:
.. flat-table::
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:stub-columns: 0
-
- O_RDONLY
- read-only access
-
- O_RDWR
- read/write access
-
- O_NONBLOCK
- open in non-blocking mode
(blocking mode is the default)
Description
-----------
This system call opens a named ca device (e.g. /dev/ost/ca) 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 CA Device in O_RDWR mode. All other attempts to open
the device in this mode will fail, and an error code will be returned.
Return Value
------------
.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
.. flat-table::
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:stub-columns: 0
- .. row 1
- ``ENODEV``
- Device driver not loaded/available.
- .. row 2
- ``EINTERNAL``
- Internal error.
- .. row 3
- ``EBUSY``
- Device or resource busy.
- .. row 4
- ``EINVAL``
- Invalid argument.
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