18.104.22.168. dvb video open()¶
dvb video open()
This ioctl is deprecated.
|const char *deviceName||Name of specific video device.|
|int flags||A bit-wise OR of the following flags:|
|O_RDONLY read-only access|
|O_RDWR read/write access|
|O_NONBLOCK open in non-blocking mode|
|(blocking mode is the default)|
This system call opens a named video device (e.g. /dev/dvb/adapter0/video0) for subsequent use.
When an open() call has succeeded, the device will be ready for use. The significance of blocking or non-blocking mode is described in the documentation for functions where there is a difference. It does not affect the semantics of the open() call itself. A device opened in blocking mode can later be put into non-blocking mode (and vice versa) using the F_SETFL command of the fcntl system call. This is a standard system call, documented in the Linux manual page for fcntl. Only one user can open the Video Device in O_RDWR mode. All other attempts to open the device in this mode will fail, and an error-code will be returned. If the Video Device is opened in O_RDONLY mode, the only ioctl call that can be used is VIDEO_GET_STATUS. All other call will return an error code.
22.214.171.124.5. Return Value¶
||Device driver not loaded/available.|
||Device or resource busy.|