1#!/bin/sh 2 3# Copyright (C) 2012 ADARA Networks. All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions 7# are met: 8# 1. Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# 2. Redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution. 13# 14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24# SUCH DAMAGE. 25# 26 27tap_exists() 28{ 29 ls -1 /dev | grep -q "$1" 30} 31 32if [ $(id -u) -ne 0 ]; then 33 echo "Must be root" >&2 34 exit 1 35fi 36 37set -e 38 39# Base case create & destroy 40tap=$(ifconfig tap create) 41tap_exists $tap 42ifconfig $tap destroy 43! tap_exists $tap 44 45# kern/172075: INVARIANTS kernel panicked when destroying an in-use tap(4) 46# Fixed in HEAD r240938. 47tap=$(ifconfig tap create) 48tap_exists $tap 49cat /dev/$tap > /dev/null & 50catpid=$! 51sleep 0.1 52ifconfig $tap destroy & 53sleep 0.1 54kill $catpid 55! tap_exists $tap 56 57echo PASS 58exit 0 59