tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
2.. c:namespace:: DTV.video
3
4.. _video_fwrite:
5
6=================
7dvb video write()
8=================
9
10Name
11----
12
13dvb video write()
14
15.. attention:: This ioctl is deprecated.
16
17Synopsis
18--------
19
20.. c:function:: size_t write(int fd, const void *buf, size_t count)
21
22Arguments
23---------
24
25.. flat-table::
26 :header-rows: 0
27 :stub-columns: 0
28
29 - .. row 1
30
31 - int fd
32
33 - File descriptor returned by a previous call to open().
34
35 - .. row 2
36
37 - void \*buf
38
39 - Pointer to the buffer containing the PES data.
40
41 - .. row 3
42
43 - size_t count
44
45 - Size of buf.
46
47Description
48-----------
49
50This system call can only be used if VIDEO_SOURCE_MEMORY is selected
51in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in
52PES format, unless the capability allows other formats. If O_NONBLOCK
53is not specified the function will block until buffer space is
54available. The amount of data to be transferred is implied by count.
55
56Return Value
57------------
58
59.. flat-table::
60 :header-rows: 0
61 :stub-columns: 0
62
63 - .. row 1
64
65 - ``EPERM``
66
67 - Mode VIDEO_SOURCE_MEMORY not selected.
68
69 - .. row 2
70
71 - ``ENOMEM``
72
73 - Attempted to write more data than the internal buffer can hold.
74
75 - .. row 3
76
77 - ``EBADF``
78
79 - fd is not a valid open file descriptor.