Re: [Qemu-devel] [PATCH v2 4/5] block: qemu-iotests - fix image cleanup when using spaced pathnames

[Fam Zheng <famz@redhat.com>]

On Thu, 04/10 14:09, Jeff Cody wrote:
> On Thu, Apr 10, 2014 at 08:48:10AM -0600, Eric Blake wrote:
> > On 04/10/2014 08:43 AM, Eric Blake wrote:
> > > On 04/10/2014 06:53 AM, Jeff Cody wrote:
> > > 
> > >>>> +++ b/tests/qemu-iotests/common.rc
> > >>>> @@ -178,10 +178,10 @@ _rm_test_img()
> > >>>>      local img=$1
> > >>>
> > >>> Since we are quoting $img, should we quote $1 as well?
> > >>>
> > 
> > > 
> > > http://austingroupbugs.net/view.php?id=351
> > > 
> > > But even with the notion of an assignment-context argument added to a
> > > future version of POSIX, the reality is that given the present standard,
> > > it's safer to either use "" to ensure no word splitting:
> > 
> > Well, if you were trying to be portable to multiple shells, then it
> > would matter.  But as this script is explicitly being run under
> > /bin/bash, and as bash already has support for declaration utilities
> > where local is one such utility, your script as written is safe without
> > "" in the arguments to local.  So I'm fine whether you choose to change
> > it in a respin or to leave it as written in this version.

Thanks for the thorough explanation, Eric!

> 
> Hi Eric,
> 
> Thanks - I consulted specifically with just the bash documentation, so
> you are right, this script (and likely most of qemu-iotests) is
> bash-only.
> 
> That particular line is context as well, and not an actual change - so
> while it may be a good idea to quote it to make the scripts closer to
> posix-only, my guess is there are quite a few similar lines throughout
> all the qemu-iotests scripts.
> 
> Given that, if we address that it would probably make sense to do that
> in a bash->posix conversion series for all the scripts (likely a low
> priority, however).
> 

OK :)

Thanks,
Fam