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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.
This commit is contained in:
gson 2013-05-31 14:40:48 +00:00
parent ed2038fadf
commit 321ad68594
1 changed files with 9 additions and 9 deletions
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18
tests/kernel/t_umountstress.sh
View File

@ -1,4 +1,4 @@
# $NetBSD: t_umountstress.sh,v 1.4 2013/04/28 15:49:58 mlelstv Exp $
# $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.
@ -69,16 +69,16 @@ EOF
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
echo 1 >result
exit
fi
done
done
echo 0
) > result &
echo 0 >result
) &
busypid=$!
while kill 2>/dev/null -0 $busypid; do
while ! test -f result; do
if err=$(umount ${TMPMP} 2>&1); then
kill $busypid
exec 9<&-
@ -150,16 +150,16 @@ EOF
for j in 0 1 2 3 4 5 6 7 8 9; do
for k in 0 1 2 3 4 5 6 7 8 9; do
if ! out=$(mount); then
echo 1
echo 1 >result
exit
fi
done
done
echo 0
) > result &
echo 0 >result
) &
busypid=$!
while kill 2>/dev/null -0 $busypid; do
while ! test -f result; do
if err=$(umount ${TMPMP} 2>&1); then
if ! mount -o async ${BVND}${MPART} ${TMPMP}; then
kill $busypid