projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 47d23e36 MCC |
1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
| 3 | .. _ca_fopen: | |
| 4 | ||
| 586027ce | 5 | ============= |
| 47d23e36 MCC |
6 | DVB CA open() |
| 7 | ============= | |
| 8 | ||
| 15e7d615 | 9 | Name |
| 586027ce | 10 | ---- |
| 47d23e36 | 11 | |
| 586027ce | 12 | DVB CA open() |
| 47d23e36 | 13 | |
| 15e7d615 MCC |
14 | |
| 15 | Synopsis | |
| 47d23e36 MCC |
16 | -------- |
| 17 | ||
| cf8076c3 MCC |
18 | .. c:function:: int open(const char *name, int flags) |
| 19 | :name: dvb-ca-open | |
| 47d23e36 | 20 | |
| 47d23e36 | 21 | |
| 15e7d615 | 22 | Arguments |
| 586027ce | 23 | --------- |
| 47d23e36 | 24 | |
| cf8076c3 MCC |
25 | ``name`` |
| 26 | Name of specific DVB CA device. | |
| 27 | ||
| 28 | ``flags`` | |
| 29 | A bit-wise OR of the following flags: | |
| 30 | ||
| 47d23e36 MCC |
31 | .. flat-table:: |
| 32 | :header-rows: 0 | |
| 33 | :stub-columns: 0 | |
| 34 | ||
| cf8076c3 MCC |
35 | - |
| 36 | - O_RDONLY | |
| 37 | - read-only access | |
| 47d23e36 | 38 | |
| cf8076c3 MCC |
39 | - |
| 40 | - O_RDWR | |
| 41 | - read/write access | |
| 47d23e36 | 42 | |
| cf8076c3 MCC |
43 | - |
| 44 | - O_NONBLOCK | |
| 45 | - open in non-blocking mode | |
| 46 | (blocking mode is the default) | |
| 47d23e36 MCC |
47 | |
| 48 | ||
| 15e7d615 | 49 | Description |
| 586027ce | 50 | ----------- |
| 47d23e36 | 51 | |
| 586027ce MCC |
52 | This system call opens a named ca device (e.g. /dev/ost/ca) for |
| 53 | subsequent use. | |
| 47d23e36 | 54 | |
| 586027ce MCC |
55 | When an open() call has succeeded, the device will be ready for use. The |
| 56 | significance of blocking or non-blocking mode is described in the | |
| 57 | documentation for functions where there is a difference. It does not | |
| 58 | affect the semantics of the open() call itself. A device opened in | |
| 59 | blocking mode can later be put into non-blocking mode (and vice versa) | |
| 60 | using the F_SETFL command of the fcntl system call. This is a standard | |
| 61 | system call, documented in the Linux manual page for fcntl. Only one | |
| 62 | user can open the CA Device in O_RDWR mode. All other attempts to open | |
| 63 | the device in this mode will fail, and an error code will be returned. | |
| 64 | ||
| 65 | ||
| 15e7d615 | 66 | Return Value |
| 586027ce | 67 | ------------ |
| 47d23e36 | 68 | |
| 16dac354 MCC |
69 | .. tabularcolumns:: |p{2.5cm}|p{15.0cm}| |
| 70 | ||
| 47d23e36 MCC |
71 | .. flat-table:: |
| 72 | :header-rows: 0 | |
| 73 | :stub-columns: 0 | |
| 74 | ||
| 75 | ||
| 76 | - .. row 1 | |
| 77 | ||
| 78 | - ``ENODEV`` | |
| 79 | ||
| 80 | - Device driver not loaded/available. | |
| 81 | ||
| 82 | - .. row 2 | |
| 83 | ||
| 84 | - ``EINTERNAL`` | |
| 85 | ||
| 86 | - Internal error. | |
| 87 | ||
| 88 | - .. row 3 | |
| 89 | ||
| 90 | - ``EBUSY`` | |
| 91 | ||
| 92 | - Device or resource busy. | |
| 93 | ||
| 94 | - .. row 4 | |
| 95 | ||
| 96 | - ``EINVAL`` | |
| 97 | ||
| 98 | - Invalid argument. |