Re: [PATCH] generic/074: _cleanup potentially removes local FS files

[Eryu Guan <eguan@redhat.com>]

On Sun, Jan 29, 2017 at 03:56:20PM +0200, Omer Zilberberg wrote:
> fstest_dir is set after _cleanup() is defined and _require_test is
> called. If _require_test fails (due to some unrelated bug in tested FS),
> _cleanup will attempt to remove $fstest_dir.*, which expands to .*
> This has the unfortunate effect of removing xfstests' .git and
> .gitignore.
> 
> Here is the 074.out.bad file for this case:
> QA output created by 074
> mount: permission denied
> common/rc: retrying test device mount with external set
> mount: permission denied
> common/rc: could not mount /dev/pmem0 on /mnt
> rm: refusing to remove '.' or '..' directory: skipping '.'
> rm: refusing to remove '.' or '..' directory: skipping '..'
> ----
> 
> The only other test which could face the same problem is generic/285.
> However, that test defines _cleanup after the _require* calls, and so on
> _require_test failure, 285.out.bad contains the harmless:
> ./common/rc: line 1: _cleanup: command not found

How about defining fstest_dir before _cleanup function? Along with
"here" and "tmp", which looks clearer and makes more sense to me.

Thanks,
Eryu

> 
> Signed-off-by: Omer Zilberberg <omzg@plexistor.com>
> ---
>  tests/generic/074 | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/tests/generic/074 b/tests/generic/074
> index 55264bd..ef84263 100755
> --- a/tests/generic/074
> +++ b/tests/generic/074
> @@ -33,7 +33,8 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>  
>  _cleanup()
>  {
> -    rm -rf $fstest_dir.* $tmp.*
> +    [ -n "$fstest_dir" ] && rm -rf $fstest_dir.*
> +    rm -rf $tmp.*
>  }
>  
>  # get standard environment, filters and checks
> -- 
> 2.9.3
> 
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