| .. -*- 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:: |
| :header-rows: 0 |
| :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:: |
| :header-rows: 0 |
| :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. |
