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