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.
#
# EtherCAT master kernel modules
#
[Unit]
Description=EtherCAT Master Kernel Modules
#
# Uncomment this, if the generic Ethernet driver is used. It assures, that the
# network interfaces are configured, before the master starts.
#
#Requires=network.service # Stop master, if network is stopped
#After=network.service # Start master, after network is ready
#
# Uncomment this, if a native Ethernet driver is used. It assures, that the
# network interfaces are configured, after the Ethernet drivers have been
# replaced. Otherwise, the networking configuration tools could be confused.
#
#Before=network.service
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=@prefix@/sbin/ethercatctl start
ExecStop=@prefix@/sbin/ethercatctl stop
[Install]
WantedBy=multi-user.target