[Qemu-devel] [PULL for-2.1 4/4] qemu-iotests: fix 028 failure due to disk image path

[Stefan Hajnoczi <stefanha@redhat.com>]

The disk image path is echoed by QEMU's readline when the "drive_backup
disk ${TEST_IMG}.copy" HMP command is issued.  Unfortunately it is very
hard to filter out the path due to readline's character-by-character
output (with terminal escape sequences).  Just redirect this command to
/dev/null for now.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
---
 tests/qemu-iotests/028     | 4 +++-
 tests/qemu-iotests/028.out | 2 --
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tests/qemu-iotests/028 b/tests/qemu-iotests/028
index d5718c5..9e701e1 100755
--- a/tests/qemu-iotests/028
+++ b/tests/qemu-iotests/028
@@ -110,7 +110,9 @@ _launch_qemu -drive file="${TEST_IMG}",cache=${CACHEMODE},id=disk
 h=$QEMU_HANDLE
 QEMU_COMM_TIMEOUT=1
 
-_send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)"
+# Silence output since it contains the disk image path and QEMU's readline
+# character echoing makes it very hard to filter the output
+_send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)" >/dev/null
 qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs"
 _send_qemu_cmd $h 'quit' ""
 
diff --git a/tests/qemu-iotests/028.out b/tests/qemu-iotests/028.out
index 38099e4..0e1a5ae 100644
--- a/tests/qemu-iotests/028.out
+++ b/tests/qemu-iotests/028.out
@@ -468,8 +468,6 @@ No errors were found on the image.
 
 block-backup
 
-QEMU X.Y.Z monitor - type 'help' for more information
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 [D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Ddrive_backup disk /home/kwolf/source/qemu/tests/qemu-iotests/scr^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Ddrive_backup disk /home/kwolf/source/qemu/tests/qemu-iotests/scra^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Ddrive_backup disk /home/kwolf/source/qemu/tests/qemu-iotests/scrat^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Ddrive_backup disk /home/kwolf/source/qemu/tests/qemu-iot!
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 Formatting 'TEST_DIR/t.qcow2.copy', fmt=qcow2 size=4294968832 backing_file='TEST_DIR/t.qcow2.base' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
 (qemu) i^[[K^[[Din^[[K^[[D^[[Dinf^[[K^[[D^[[D^[[Dinfo^[[K^[[D^[[D^[[D^[[Dinfo ^[[K^[[D^[[D^[[D^[[D^[[Dinfo b^[[K^[[D^[[D^[[D^[[D^[[D^[[Dinfo bl^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[Dinfo blo^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Dinfo bloc^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Dinfo block^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Dinfo block-^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Dinfo block-j^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Dinfo block-jo^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Dinfo block-job^[[K^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[D^[[Dinfo block-jobs^[[K
 Type backup, device disk: Completed 0 of 4294968832 bytes, speed limit 0 bytes/s
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1.9.3