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test-tap.sh
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Editing: test-tap.sh
#!/bin/sh # Copyright (C) 2012 ADARA Networks. All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # # $FreeBSD$ tap_exists() { ls -1 /dev | grep -q "$1" } if [ $(id -u) -ne 0 ]; then echo "Must be root" >&2 exit 1 fi set -e # Base case create & destroy tap=$(ifconfig tap create) tap_exists $tap ifconfig $tap destroy ! tap_exists $tap # kern/172075: INVARIANTS kernel panicked when destroying an in-use tap(4) # Fixed in HEAD r240938. tap=$(ifconfig tap create) tap_exists $tap cat /dev/$tap > /dev/null & catpid=$! sleep 0.1 ifconfig $tap destroy & sleep 0.1 kill $catpid ! tap_exists $tap echo PASS exit 0
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