linux-kernel - Re: [BUGFIX PATCH] selftests: Use real temporary working directory for archiving

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Date:   Wed, 9 Oct 2019 11:44:52 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     <Tim.Bird@...y.com>
Cc:     <shuah@...nel.org>, <linux-kselftest@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <jaswinder.singh@...aro.org>
Subject: Re: [BUGFIX PATCH] selftests: Use real temporary working directory
 for archiving

On Tue, 8 Oct 2019 23:39:40 +0000
<Tim.Bird@...y.com> wrote:

> 
> 
> > -----Original Message-----
> > From: Masami Hiramatsu on Thursday, October 03, 2019 7:13 PM
> > 
> > Use real temporary working directory for generating kselftest
> > archive.
> > 
> > tools/testing/selftests/kselftest directory has been used for
> > the temporary working directory for making a tar archive from
> > gen_kselftest_tar.sh, and it removes the directory for cleanup.
> > 
> > However, since the kselftest directory became a part of the
> > repository, it must not be used as a working dir.
> 
> I'm not objecting to the test, but I would like to understand this
> point better.  Under normal circumstances (i.e. when not using O= or KBUILD_OUTPUT)
> the rest of the kernel directory structure holds generated files.
> What is the issue with using kselftest to hold generated files?

OK, after running ./gen_kselftest_tar.sh in tools/testing/selftests,
I found there is no tools/testing/selftests/kselftest was there.
Actually, this was found when I searched "runner.sh" on the tree
after building kselftest.tar.gz. I couldn't find it and realized that
the gen_kselftest_tar.sh removed kselftest directory.

This is not happen if you run gen_kselftest_tar.sh.

Thank you,

>  -- Tim
> 
> > 
> > Introduce mktemp to prepare a temporary working directory
> > for archiving kselftests.
> > 
> > Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> > ---
> >  tools/testing/selftests/gen_kselftest_tar.sh |    8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/tools/testing/selftests/gen_kselftest_tar.sh
> > b/tools/testing/selftests/gen_kselftest_tar.sh
> > index a27e2eec3586..eba1e9987ffc 100755
> > --- a/tools/testing/selftests/gen_kselftest_tar.sh
> > +++ b/tools/testing/selftests/gen_kselftest_tar.sh
> > @@ -38,16 +38,16 @@ main()
> >  	esac
> >  	fi
> > 
> > -	install_dir=./kselftest
> > +	tmpdir=`mktemp -d ./install-XXXXXX` || exit 1
> > 
> >  # Run install using INSTALL_KSFT_PATH override to generate install
> >  # directory
> > -./kselftest_install.sh
> > -tar $copts kselftest${ext} $install_dir
> > +./kselftest_install.sh $tmpdir
> > +tar $copts kselftest${ext} -C $tmpdir kselftest
> >  echo "Kselftest archive kselftest${ext} created!"
> > 
> >  # clean up install directory
> > -rm -rf kselftest
> > +rm -rf $tmpdir
> >  }
> > 
> >  main "$@"
> 


-- 
Masami Hiramatsu <mhiramat@...nel.org>