Re: [Qemu-devel] [PATCH v5 01/10] qemu-iotests: refuse to run if TEST_DIR contains spaces

[Jeff Cody <jcody@redhat.com>]

On Tue, Oct 17, 2017 at 08:03:56PM -0500, Eric Blake wrote:
> On 10/17/2017 11:31 AM, Jeff Cody wrote:
> > Currently, not all qemu-iotests work if TEST_DIR has spaces, and they
> > also might not be safe.  Refuse to run if TEST_DIR in this case, at
> > least until all tests are fixed sometime in the future.
> > 
> > Signed-off-by: Jeff Cody <jcody@redhat.com>
> > ---
> >  tests/qemu-iotests/check | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
> > index e6b6ff7..e2163cc 100755
> > --- a/tests/qemu-iotests/check
> > +++ b/tests/qemu-iotests/check
> > @@ -102,6 +102,14 @@ if [ -z "$TEST_DIR" ]; then
> >          TEST_DIR=`pwd`/scratch
> >  fi
> >  
> > +case $TEST_DIR in
> > +    *[[:blank:]]*)
> > +        echo "The TEST_DIR pathname '$TEST_DIR' contains whitespace. "
> 
> Echoes a trailing space. Do we care?
> 

Heh, spurious whitespcae, a bit ironic, I suppose...

Might as well take care of it with a v6, along with expanding the tests as
you hint at below.

> > +        echo "This is currently unsupported by qemu-iotests"
> 
> Is it just whitespace, or should we also be wary of other shell
> metacharacters (such as quotes or glob characters)?  In test 197, I did
> an alternative check for anything that is not alphanumeric, -, or _ (and
> allowing / between names).

I know that '-' works, because for years my work directory has been called
"qemu-kvm".  I'm not sure about globbing characters like *, or quotes, but
probably not a bad idea to exclude them as well (although, someone that
uses '*' in their directory names is probably no stranger to data
catastrophe!).

> 
> > +        exit 1
> > +        ;;
> > +esac
> > +
> >  if [ ! -e "$TEST_DIR" ]; then
> >          mkdir "$TEST_DIR"
> >  fi
> > 
> 
> -- 
> Eric Blake, Principal Software Engineer
> Red Hat, Inc.           +1-919-301-3266
> Virtualization:  qemu.org | libvirt.org
>