iface_restart

#!/bin/sh

filename=${0##*/}

usage()
{
cat<<EOF
Usage:
	$filename <iface>
EOF
}

_iface_restart()
{
	local iface="$1"
	local module="$2"

	echo "inerface: $iface"
	echo "module: $module"
	echo "==== reload start ===="

sudo -s <<EOF
	echo "interface down: $iface"
	ifconfig $iface down

	echo "module remove: $module"
	modprobe --remove $module
	sleep 1

	echo "module probe: $module"
	modprobe $module
	sleep 1

	echo "interface up: $iface"
	ifconfig $iface up
	echo "==== reload done ===="
EOF
}


main()
{
	iface="${1}"
	if [ -z "$iface" ]; then
		usage
		exit 1
	fi

	module="$(basename $(readlink -f /sys/class/net/$iface/device/driver 2>/dev/null) 2>/dev/null)"

	if [ -z "$module" ]; then
		echo "Error: no module found" 1>&2
		exit 1
	fi

	_iface_restart "$iface" "$module"
}

main "$@"