qemu/tests/qemu-iotests/068
Eric Blake b43671f80c tests: Avoid non-portable 'echo -ARG'
POSIX says that backslashes in the arguments to 'echo', as well as
any use of 'echo -n' and 'echo -e', are non-portable; it recommends
people should favor 'printf' instead.  This is definitely true where
we do not control which shell is running (such as in makefile snippets
or in documentation examples).  But even for scripts where we
require bash (and therefore, where echo does what we want by default),
it is still possible to use 'shopt -s xpg_echo' to change bash's
behavior of echo.  And setting a good example never hurts when we are
not sure if a snippet will be copied from a bash-only script to a
general shell script (although I don't change the use of non-portable
\e for ESC when we know the running shell is bash).

Replace 'echo -n "..."' with 'printf %s "..."', and 'echo -e "..."'
with 'printf %b "...\n"', with the optimization that the %s/%b
argument can be omitted if the string being printed is a strict
literal with no '%', '$', or '`' (we could technically also make
this optimization when there are $ or `` substitutions but where
we can prove their results will not be problematic, but proving
that such substitutions are safe makes the patch less trivial
compared to just being consistent).

In the qemu-iotests check script, fix unusual shell quoting
that would result in word-splitting if 'date' outputs a space.

In test 051, take an opportunity to shorten the line.

In test 068, get rid of a pointless second invocation of bash.

CC: qemu-trivial@nongnu.org
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-id: 20170703180950.9895-1-eblake@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-07-11 17:45:00 +02:00

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#!/bin/bash
#
# Test case for loading a saved VM state from a qcow2 image
#
# Copyright (C) 2013 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# creator
owner=mreitz@redhat.com
seq="$(basename $0)"
echo "QA output created by $seq"
here="$PWD"
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
# This tests qocw2-specific low-level functionality
_supported_fmt qcow2
_supported_proto generic
_supported_os Linux
IMGOPTS="compat=1.1"
IMG_SIZE=128K
case "$QEMU_DEFAULT_MACHINE" in
s390-ccw-virtio)
platform_parm="-no-shutdown"
hba=virtio-scsi-ccw
;;
*)
platform_parm=""
hba=virtio-scsi-pci
;;
esac
_qemu()
{
$QEMU $platform_parm -nographic -monitor stdio -serial none \
-drive if=none,id=drive0,file="$TEST_IMG",format="$IMGFMT" \
-device $hba,id=hba0 \
-device scsi-hd,drive=drive0 \
"$@" |\
_filter_qemu | _filter_hmp
}
for extra_args in \
"" \
"-object iothread,id=iothread0 -set device.hba0.iothread=iothread0"; do
echo
echo "=== Saving and reloading a VM state to/from a qcow2 image ($extra_args) ==="
echo
_make_test_img $IMG_SIZE
# Give qemu some time to boot before saving the VM state
{ sleep 1; printf "savevm 0\nquit\n"; } | _qemu $extra_args
# Now try to continue from that VM state (this should just work)
echo quit | _qemu $extra_args -loadvm 0
done
# success, all done
echo "*** done"
rm -f $seq.full
status=0