2.4.5. ioctl FE_SET_PROPERTY, FE_GET_PROPERTY¶
FE_SET_PROPERTY - FE_GET_PROPERTY - FE_SET_PROPERTY sets one or more frontend properties. - FE_GET_PROPERTY returns one or more frontend properties.
int ioctl(int fd, FE_GET_PROPERTY, struct dtv_properties *argp)
int ioctl(int fd, FE_SET_PROPERTY, struct dtv_properties *argp)
All Digital TV frontend devices support the
FE_GET_PROPERTY ioctls. The supported properties and statistics
depends on the delivery system and on the device:
This ioctl is used to set one or more frontend properties.
This is the basic command to request the frontend to tune into some frequency and to start decoding the digital TV signal.
This call requires read/write access to the device.
At return, the values aren't updated to reflect the actual
parameters used. If the actual parameters are needed, an explicit
FE_GET_PROPERTY is needed.
This ioctl is used to get properties and statistics from the frontend.
No properties are changed, and statistics aren't reset.
This call only requires read-only access to the device.
18.104.22.168. Return Value¶
On success 0 is returned.
On error -1 is returned, and the
errno variable is set
Generic error codes are described at the Generic Error Codes chapter.