Re: [Qemu-devel] [PATCH v3 6/6] qemu-iotests: Additional info from qemu-img info

[Fam Zheng <famz@redhat.com>]

On Wed, 09/11 09:26, Max Reitz wrote:
> On 2013-09-11 08:23, Fam Zheng wrote:
> >On Tue, 09/10 11:33, Max Reitz wrote:
> >>Add a test for the additional information now provided by qemu-img info
> >>when used on qcow2 images.
> >>
> >>Signed-off-by: Max Reitz <mreitz@redhat.com>
> >>---
> >>  tests/qemu-iotests/064     | 72 ++++++++++++++++++++++++++++++++++++++++++++++
> >>  tests/qemu-iotests/064.out | 22 ++++++++++++++
> >>  tests/qemu-iotests/group   |  1 +
> >>  3 files changed, 95 insertions(+)
> >>  create mode 100755 tests/qemu-iotests/064
> >>  create mode 100644 tests/qemu-iotests/064.out
> >>
> >>diff --git a/tests/qemu-iotests/064 b/tests/qemu-iotests/064
> >>new file mode 100755
> >>index 0000000..4979db5
> >>--- /dev/null
> >>+++ b/tests/qemu-iotests/064
> >>@@ -0,0 +1,72 @@
> >>+#!/bin/bash
> >>+#
> >>+# Test for additional information emitted by qemu-img info on qcow2
> >>+# images
> >>+#
> >>+# 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`
> >>+tmp=/tmp/$$
> >>+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
> >>+
> >>+IMG_SIZE=64M
> >>+
> >>+echo
> >>+echo "=== Testing qcow2 image with -o compat=0.10 ==="
> >>+echo
> >>+IMGOPTS="compat=0.10" _make_test_img $IMG_SIZE
> >>+# don't use _img_info, since that function will filter out the
> >>+# additional information we're about to test for
> >>+$QEMU_IMG info "$TEST_IMG" | grep "Format specific information:" -A 42
> >For curiosity, where's 42 from?
> I want to read all format specific information there, and because
> this is the last information emitted by qemu_img -info, I have to
> grep everything after the line "Format specific information:" until
> EOF – I didn't find an easy way to do this, so I just chose a number
> of lines which seemed enough to fetch all of that format specific
> info (currently, 2 would suffice).
> 
Maybe
    $QEMU_IMG info "$TEST_IMG" | sed -n 'Format specific information:/,$ p'
?

Fam