1 .. -*- coding: utf-8; mode: rst -*-
18 .. cpp:function:: int open(const char *deviceName, int flags)
31 - const char \*deviceName
33 - Name of specific video device.
39 - A bit-wise OR of the following flags:
44 - O_RDONLY read-only access
49 - O_RDWR read/write access
54 - O_NONBLOCK open in non-blocking mode
59 - (blocking mode is the default)
65 This system call opens a named video device (e.g.
66 /dev/dvb/adapter0/video0) for subsequent use.
68 When an open() call has succeeded, the device will be ready for use. The
69 significance of blocking or non-blocking mode is described in the
70 documentation for functions where there is a difference. It does not
71 affect the semantics of the open() call itself. A device opened in
72 blocking mode can later be put into non-blocking mode (and vice versa)
73 using the F_SETFL command of the fcntl system call. This is a standard
74 system call, documented in the Linux manual page for fcntl. Only one
75 user can open the Video Device in O_RDWR mode. All other attempts to
76 open the device in this mode will fail, and an error-code will be
77 returned. If the Video Device is opened in O_RDONLY mode, the only
78 ioctl call that can be used is VIDEO_GET_STATUS. All other call will
94 - Device driver not loaded/available.
106 - Device or resource busy.