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Linux kernel mirror (for testing)
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1.. Permission is granted to copy, distribute and/or modify this
2.. document under the terms of the GNU Free Documentation License,
3.. Version 1.1 or any later version published by the Free Software
4.. Foundation, with no Invariant Sections, no Front-Cover Texts
5.. and no Back-Cover Texts. A copy of the license is included at
6.. Documentation/userspace-api/media/fdl-appendix.rst.
7..
8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
9
10.. _video_fwrite:
11
12=================
13dvb video write()
14=================
15
16Name
17----
18
19dvb video write()
20
21.. attention:: This ioctl is deprecated.
22
23Synopsis
24--------
25
26.. c:function:: size_t write(int fd, const void *buf, size_t count)
27
28
29Arguments
30---------
31
32.. flat-table::
33 :header-rows: 0
34 :stub-columns: 0
35
36
37 - .. row 1
38
39 - int fd
40
41 - File descriptor returned by a previous call to open().
42
43 - .. row 2
44
45 - void \*buf
46
47 - Pointer to the buffer containing the PES data.
48
49 - .. row 3
50
51 - size_t count
52
53 - Size of buf.
54
55
56Description
57-----------
58
59This system call can only be used if VIDEO_SOURCE_MEMORY is selected
60in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in
61PES format, unless the capability allows other formats. If O_NONBLOCK
62is not specified the function will block until buffer space is
63available. The amount of data to be transferred is implied by count.
64
65
66Return Value
67------------
68
69.. flat-table::
70 :header-rows: 0
71 :stub-columns: 0
72
73
74 - .. row 1
75
76 - ``EPERM``
77
78 - Mode VIDEO_SOURCE_MEMORY not selected.
79
80 - .. row 2
81
82 - ``ENOMEM``
83
84 - Attempted to write more data than the internal buffer can hold.
85
86 - .. row 3
87
88 - ``EBADF``
89
90 - fd is not a valid open file descriptor.