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iotests: Make redirecting qemu's stderr optional

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Redirecting qemu's stderr to stdout makes working with the stderr output
difficult due to the other file descriptor magic performed in
_launch_qemu ("ambiguous redirect").

Add an option which specifies whether stderr should be redirected to
stdout or not (allowing for other modes to be added in the future).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2016-01-25 19:41:14 +01:00
parent 4a940d14b3
commit 15cfba693b
1 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
tests/qemu-iotests/common.qemu
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@ -129,6 +129,8 @@ function _send_qemu_cmd()
# $qemu_comm_method: set this variable to 'monitor' (case insensitive)
# to use the QEMU HMP monitor for communication.
# Otherwise, the default of QMP is used.
# $keep_stderr: Set this variable to 'y' to keep QEMU's stderr output on stderr.
# If this variable is empty, stderr will be redirected to stdout.
# Returns:
# $QEMU_HANDLE: set to a handle value to communicate with this QEMU instance.
#
@ -151,11 +153,20 @@ function _launch_qemu()
mkfifo "${fifo_out}"
mkfifo "${fifo_in}"
if [ -z "$keep_stderr" ]; then
QEMU_NEED_PID='y'\
${QEMU} -nographic -serial none ${comm} -machine accel=qtest "${@}" \
>"${fifo_out}" \
2>&1 \
<"${fifo_in}" &
elif [ "$keep_stderr" = "y" ]; then
QEMU_NEED_PID='y'\
${QEMU} -nographic -serial none ${comm} -machine accel=qtest "${@}" \
>"${fifo_out}" \
<"${fifo_in}" &
else
exit 1
fi
if [[ "${BASH_VERSINFO[0]}" -ge "5" ||
("${BASH_VERSINFO[0]}" -ge "4" && "${BASH_VERSINFO[1]}" -ge "1") ]]