Re: [Qemu-devel] [PATCH v3 2/3] block: Remove inner quotation marks in iotest 085

[Eric Blake]

On 11/03/2015 03:32 AM, Alberto Garcia wrote:
> This patch removes the inner quotation marks in all cases like this:
> 
>    cmd=" ... "${variable}" ... "
> 
> Signed-off-by: Alberto Garcia <address@hidden>
> ---
>  tests/qemu-iotests/085 | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)

Reviewed-by: Eric Blake <address@hidden>

I might have worded the commit message differently, though:

block: Remove incorrect "" in iotest 085

We had the patterns:
   cmd="..."${variable}"..."
   _send_qemu_cmd ... "..."${variable}"..."

which is equivalent to using ${variable} unquoted.  In the cmd= usage,
that happened to be okay even though it is unusual (because no word
splitting occurs on variable assignment); but where the usage appeared
as an argument to _send_qemu_cmd, it was actively wrong (any whitespace
in ${variable} would have caused word splitting).

Fix it by removing the inner "", leaving ${variable} to be expanded
inside the outer "" as desired.


> @@ -152,7 +152,7 @@ echo === Invalid command - missing device and nodename ===
>  echo
>  
>  _send_qemu_cmd $h "{ 'execute': 'blockdev-snapshot-sync',
> -                         'arguments': { 
> 'snapshot-file':'"${TEST_DIR}/1-${snapshot_virt0}"',
> +                         'arguments': { 
> 'snapshot-file':'${TEST_DIR}/1-${snapshot_virt0}',
>                                       'format': 'qcow2' } }" "error"
>  

Here's an example of the actual bug being fixed.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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