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