linux-kernel - Re: [PATCH] selftests: ftrace: Use md5sum to take less time of checking logs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 28 Jun 2017 08:00:35 -0600
From:   Shuah Khan <shuah@...nel.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>,
        linux-kselftest@...r.kernel.org,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH] selftests: ftrace: Use md5sum to take less time of
 checking logs

On 06/27/2017 04:28 AM, Masami Hiramatsu wrote:
> Use md5sum so that it takes less time of checking
> trace logs update. Since busybox tail/cat takes too
> long time to read the trace log, this uses md5sum
> to check whether trace log is updated or not.
> 
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>

Applied to linux-kselftest next for 4.13-rc1

thanks,
-- Shuah

> ---
>  .../test.d/ftrace/func_traceonoff_triggers.tc      |    6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc
> index 9cf3852..7a9ab4f 100644
> --- a/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc
> +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc
> @@ -103,11 +103,11 @@ if [ $on != "0" ]; then
>      fail "Tracing is not off"
>  fi
>  
> -line1=`cat trace | tail -1`
> +csum1=`md5sum trace`
>  sleep $SLEEP_TIME
> -line2=`cat trace | tail -1`
> +csum2=`md5sum trace`
>  
> -if [ "$line1" != "$line2" ]; then
> +if [ "$csum1" != "$csum2" ]; then
>      fail "Tracing file is still changing"
>  fi
>  
> 
> 
>