comedi_set_read_subdevice(3)

Usage

#include <comedilib.h>

int comedi_set_read_subdevice(comedi_t * device, unsigned int subdevice);

Works for Linux "in-tree" Comedi since kernel version 3.19.

The function comedi_set_read_subdevice sets subdevice as the current “read” subdevice if the subdevice supports streaming input commands.

No action is performed if subdevice is already the current “read” subdevice.

Changes are local to the open file description for this device and have no effect on other open file descriptions for the underlying device node.

On success, 0 is returned. On failure, -1 is returned.

4 releases since Debian 10 (Buster); the text changed 3 times.