devices/rtdmnet.c : abuse RTDM api to allow sendmsg and recvmsg to be called indirectly from userland cobalt process ioctl, while rtdm_socket is created from a kernel thread.
/******************************************************************************
*
* $Id$
*
* Copyright (C) 2006-2012 Florian Pose, Ingenieurgemeinschaft IgH
*
* This file is part of the IgH EtherCAT master userspace library.
*
* The IgH EtherCAT master userspace library is free software; you can
* redistribute it and/or modify it under the terms of the GNU Lesser General
* Public License as published by the Free Software Foundation; version 2.1
* of the License.
*
* The IgH EtherCAT master userspace library is distributed in the hope that
* it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the IgH EtherCAT master userspace library. If not, see
* <http://www.gnu.org/licenses/>.
*
* ---
*
* The license mentioned above concerns the source code only. Using the
* EtherCAT technology and brand is only permitted in compliance with the
* industrial property and similar rights of Beckhoff Automation GmbH.
*
*****************************************************************************/
#ifndef __EC_LIB_IOCTL_H__
#define __EC_LIB_IOCTL_H__
/*****************************************************************************/
#include <sys/ioctl.h>
/*****************************************************************************/
#include "master/ioctl.h"
/*****************************************************************************/
/* FIXME : historical code inherited from difference
between RTDM ioctl an normal ioctl
-> should ioctl.h be removed ? */
/* libc's ioctl() always returns -1 on error and sets errno */
#define EC_IOCTL_IS_ERROR(X) ((X) == -1)
#define EC_IOCTL_ERRNO(X) (errno)
#include <errno.h>
/*****************************************************************************/
#endif /* __EC_LIB_IOCTL_H__ */
/*****************************************************************************/