ioctl FE_SET_PROPERTY, FE_GET_PROPERTY &manvol; 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 int request struct dtv_properties *argp fd &fe_fd; request FE_SET_PROPERTY, FE_GET_PROPERTY argp pointer to &dtv-properties; All DVB frontend devices support the FE_SET_PROPERTY and FE_GET_PROPERTY ioctls. The supported properties and statistics depends on the delivery system and on the device: FE_SET_PROPERTY: 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 are updated to reflect the actual parameters used. FE_GET_PROPERTY: 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. &return-value-dvb;