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Don't rely on "kill -0" to check whether a background shell command
has exited; it does not work reliably because the process may still
exist as a zombie.  OK mlelstv.

# $NetBSD: t_umountstress.sh,v 1.5 2013/05/31 14:40:48 gson Exp $
#
# Copyright (c) 2013 The NetBSD Foundation, Inc.
# 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
#

TMPMP=umount-stress_mount
TMPIM=umount-stress.im

VND=vnd0
BVND=/dev/${VND}
CVND=/dev/r${VND}
MPART=a

atf_test_case fileop cleanup
fileop_head()
{
	atf_set "descr" "Checks unmounting a filesystem doing file operations"
	atf_set "require.user" "root"
}
fileop_body()
{
	cat >disktab <<EOF
floppy288|2.88MB 3.5in Extra High Density Floppy:\
	:ty=floppy:se#512:nt#2:rm#300:ns#36:nc#80:\
	:pa#5760:oa#0:ba#4096:fa#512:ta=4.2BSD:\
	:pb#5760:ob#0:\
	:pc#5760:oc#0:
EOF

	echo "*** Creating a dummy directory tree at" \
	     "${TMPMP} mounted on ${TMPIM}"

	atf_check -o ignore -e ignore mkdir ${TMPMP}
	atf_check -o ignore -e ignore dd if=/dev/zero of=${TMPIM} count=5860
	atf_check -o ignore -e ignore vnconfig -v ${VND} ${TMPIM}
	atf_check -o ignore -e ignore disklabel -f disktab -rw ${VND} floppy288
	atf_check -o ignore -e ignore newfs -i 500 -b 8192 -f 1024 ${CVND}${MPART}
	atf_check -o ignore -e ignore mount -o async ${BVND}${MPART} ${TMPMP}

	echo "*** Testing fileops"

	touch ${TMPMP}/hold
	exec 9< ${TMPMP}/hold

	(
		for j in 0 1 2; do
		for k in 0 1 2 3 4 5 6 7 8 9; do
			if ! dd msgfmt=quiet if=/dev/zero \
				count=1 of=${TMPMP}/test$i$j$k; then
				echo 1 >result
				exit
			fi
		done
		done
		echo 0 >result
	) &
	busypid=$!

	while ! test -f result; do
		if err=$(umount ${TMPMP} 2>&1); then
			kill $busypid
			exec 9<&-
			wait
			atf_fail "Unmount succeeded while busy"
			return
		fi

		case $err in
		*:\ Device\ busy)
			;;
		*)
			kill $busypid
			exec 9<&-
			wait
			atf_fail "Unmount failed: $err"
			return
			;;
		esac
	done

	exec 9<&-
	wait

	rc=`cat result`
	rm -f result

	case $rc in
	0) ;;
	*) atf_fail "File operation failed"
	esac
}
fileop_cleanup()
{
	echo "*** Cleaning up ${TMPMP}, ${TMPIM}."
	umount -f "${TMPMP}"
	vnconfig -u "${VND}"
}

atf_test_case mountlist cleanup
mountlist_head()
{
	atf_set "descr" "Checks unmounting a filesystem using mountlist"
	atf_set "require.user" "root"
}
mountlist_body()
{
	cat >disktab <<EOF
floppy288|2.88MB 3.5in Extra High Density Floppy:\
	:ty=floppy:se#512:nt#2:rm#300:ns#36:nc#80:\
	:pa#5760:oa#0:ba#4096:fa#512:ta=4.2BSD:\
	:pb#5760:ob#0:\
	:pc#5760:oc#0:
EOF

	echo "*** Creating a dummy directory tree at" \
	     "${TMPMP} mounted on ${TMPIM}"

	atf_check -o ignore -e ignore mkdir ${TMPMP}
	atf_check -o ignore -e ignore dd if=/dev/zero of=${TMPIM} count=5860
	atf_check -o ignore -e ignore vnconfig -v ${VND} ${TMPIM}
	atf_check -o ignore -e ignore disklabel -f disktab -rw ${VND} floppy288
	atf_check -o ignore -e ignore newfs -i 500 -b 8192 -f 1024 ${CVND}${MPART}
	atf_check -o ignore -e ignore mount -o async ${BVND}${MPART} ${TMPMP}

	echo "*** Testing mountlist"

	(
		for j in 0 1 2 3 4 5 6 7 8 9; do
		for k in 0 1 2 3 4 5 6 7 8 9; do
			if ! out=$(mount); then
				echo 1 >result
				exit
			fi
		done
		done
		echo 0 >result
	) &
	busypid=$!

	while ! test -f result; do
		if err=$(umount ${TMPMP} 2>&1); then
			if ! mount -o async ${BVND}${MPART} ${TMPMP}; then
				kill $busypid
				exec 9<&-
				wait
				atf_fail "Remount failed"
				return
			fi
			continue
		fi

		case $err in
		*:\ Device\ busy)
			;;
		*)
			kill $busypid
			exec 9<&-
			wait
			atf_fail "Unmount failed: $err"
			return
			;;
		esac
	done

	exec 9<&-
	wait

	rc=`cat result`
	rm -f result

	case $rc in
	0) ;;
	*) atf_fail "Mountlist operation failed"
	esac
}
mountlist_cleanup()
{
	echo "*** Cleaning up ${TMPMP}, ${TMPIM}."
	umount -f "${TMPMP}"
	vnconfig -u "${VND}"
}

atf_init_test_cases()
{
	atf_add_test_case fileop
	atf_add_test_case mountlist
}