tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1.. -*- coding: utf-8; mode: rst -*-
2
3.. _video_fwrite:
4
5=================
6dvb video write()
7=================
8
9Name
10----
11
12dvb video write()
13
14.. attention:: This ioctl is deprecated.
15
16Synopsis
17--------
18
19.. c:function:: size_t write(int fd, const void *buf, size_t count)
20
21
22Arguments
23---------
24
25.. flat-table::
26 :header-rows: 0
27 :stub-columns: 0
28
29
30 - .. row 1
31
32 - int fd
33
34 - File descriptor returned by a previous call to open().
35
36 - .. row 2
37
38 - void \*buf
39
40 - Pointer to the buffer containing the PES data.
41
42 - .. row 3
43
44 - size_t count
45
46 - Size of buf.
47
48
49Description
50-----------
51
52This system call can only be used if VIDEO_SOURCE_MEMORY is selected
53in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in
54PES format, unless the capability allows other formats. If O_NONBLOCK
55is not specified the function will block until buffer space is
56available. The amount of data to be transferred is implied by count.
57
58
59Return Value
60------------
61
62.. flat-table::
63 :header-rows: 0
64 :stub-columns: 0
65
66
67 - .. row 1
68
69 - ``EPERM``
70
71 - Mode VIDEO_SOURCE_MEMORY not selected.
72
73 - .. row 2
74
75 - ``ENOMEM``
76
77 - Attempted to write more data than the internal buffer can hold.
78
79 - .. row 3
80
81 - ``EBADF``
82
83 - fd is not a valid open file descriptor.