comedi_set_write_subdevice3

Usage

#include <comedilib.h>

Status

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

Overview

The function comedi_set_write_subdevice sets subdevice as the current “write” subdevice if the subdevice supports streaming output commands.

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

Return value

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