linux-kernel - Re: [PATCH v2] selftests/kselftest/runner/run_one(): Allow running non-executable files

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Date:   Fri, 15 Oct 2021 08:52:41 +0000
From:   SeongJae Park <sj@...nel.org>
To:     SeongJae Park <sj@...nel.org>
Cc:     SeongJae Park <sj38.park@...il.com>, shuah@...nel.org,
        gregkh@...uxfoundation.org, akpm@...ux-foundation.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        SeongJae Park <sjpark@...zon.de>
Subject: Re: [PATCH v2] selftests/kselftest/runner/run_one(): Allow running non-executable files

Gentle ping.

On Fri, 8 Oct 2021 09:58:28 +0000 SeongJae Park <sj@...nel.org> wrote:

> Hello Shuah,
> 
> 
> I was wondering if you had a chance to read this patch.
> 
> Without this patch, DAMON selftest fails as below:
> 
>     $ make -C tools/testing/selftests/damon/ run_tests
>     make: Entering directory '/home/sjpark/linux/tools/testing/selftests/damon'
>     TAP version 13
>     1..1
>     # selftests: damon: debugfs_attrs.sh
>     # Warning: file debugfs_attrs.sh is not executable, correct this.
>     not ok 1 selftests: damon: debugfs_attrs.sh
>     make: Leaving directory '/home/sjpark/linux/tools/testing/selftests/damon'
> 
> If you disagree in the approach, please also take a look in this one:
> https://lore.kernel.org/linux-kselftest/20210810112050.22225-1-sj38.park@gmail.com/
> 
> 
> Thanks,
> SJ
> 
> 
> On Mon, 13 Sep 2021 11:24:42 +0000 SeongJae Park <sj38.park@...il.com> wrote:
> 
> > From: SeongJae Park <sjpark@...zon.de>
> > 
> > Hello Shuah,
> > 
> > 
> > Could you I ask your comment for this patch?
> > 
> > 
> > Thanks,
> > SJ
> > 
> > On Tue, 10 Aug 2021 16:45:34 +0000 SeongJae Park <sj38.park@...il.com> wrote:
> > 
> > > From: SeongJae Park <sjpark@...zon.de>
> > > 
> > > When running a test program, 'run_one()' checks if the program has the
> > > execution permission and fails if it doesn't.  However, it's easy to
> > > mistakenly missing the permission, as some common tools like 'diff'
> > > don't support the permission change well[1].  Compared to that, making
> > > mistakes in the test program's path would only rare, as those are
> > > explicitly listed in 'TEST_PROGS'.  Therefore, it might make more sense
> > > to resolve the situation on our own and run the program.
> > > 
> > > For the reason, this commit makes the test program runner function to
> > > still print the warning message but try parsing the interpreter of the
> > > program and explicitly run it with the interpreter, in the case.
> > > 
> > > [1] https://lore.kernel.org/mm-commits/YRJisBs9AunccCD4@kroah.com/
> > > 
> > > Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > > Signed-off-by: SeongJae Park <sjpark@...zon.de>
> > > ---
> > > Changes from v1
> > > (https://lore.kernel.org/linux-kselftest/20210810140459.23990-1-sj38.park@gmail.com/)
> > > - Parse and use the interpreter instead of changing the file
> > > 
> > >  tools/testing/selftests/kselftest/runner.sh | 28 +++++++++++++--------
> > >  1 file changed, 18 insertions(+), 10 deletions(-)
> > > 
> > > diff --git a/tools/testing/selftests/kselftest/runner.sh b/tools/testing/selftests/kselftest/runner.sh
> > > index cc9c846585f0..a9ba782d8ca0 100644
> > > --- a/tools/testing/selftests/kselftest/runner.sh
> > > +++ b/tools/testing/selftests/kselftest/runner.sh
> > > @@ -33,9 +33,9 @@ tap_timeout()
> > >  {
> > >  	# Make sure tests will time out if utility is available.
> > >  	if [ -x /usr/bin/timeout ] ; then
> > > -		/usr/bin/timeout --foreground "$kselftest_timeout" "$1"
> > > +		/usr/bin/timeout --foreground "$kselftest_timeout" $1
> > >  	else
> > > -		"$1"
> > > +		$1
> > >  	fi
> > >  }
> > >  
> > > @@ -65,17 +65,25 @@ run_one()
> > >  
> > >  	TEST_HDR_MSG="selftests: $DIR: $BASENAME_TEST"
> > >  	echo "# $TEST_HDR_MSG"
> > > -	if [ ! -x "$TEST" ]; then
> > > -		echo -n "# Warning: file $TEST is "
> > > -		if [ ! -e "$TEST" ]; then
> > > -			echo "missing!"
> > > -		else
> > > -			echo "not executable, correct this."
> > > -		fi
> > > +	if [ ! -e "$TEST" ]; then
> > > +		echo "# Warning: file $TEST is missing!"
> > >  		echo "not ok $test_num $TEST_HDR_MSG"
> > >  	else
> > > +		cmd="./$BASENAME_TEST"
> > > +		if [ ! -x "$TEST" ]; then
> > > +			echo "# Warning: file $TEST is not executable"
> > > +
> > > +			if [ $(head -n 1 "$TEST" | cut -c -2) = "#!" ]
> > > +			then
> > > +				interpreter=$(head -n 1 "$TEST" | cut -c 3-)
> > > +				cmd="$interpreter ./$BASENAME_TEST"
> > > +			else
> > > +				echo "not ok $test_num $TEST_HDR_MSG"
> > > +				return
> > > +			fi
> > > +		fi
> > >  		cd `dirname $TEST` > /dev/null
> > > -		((((( tap_timeout ./$BASENAME_TEST 2>&1; echo $? >&3) |
> > > +		((((( tap_timeout "$cmd" 2>&1; echo $? >&3) |
> > >  			tap_prefix >&4) 3>&1) |
> > >  			(read xs; exit $xs)) 4>>"$logfile" &&
> > >  		echo "ok $test_num $TEST_HDR_MSG") ||
> > > -- 
> > > 2.17.1
> > >