Re: [PATCH v2 1/2] selftests/ftrace: Replace echo -e with printf

From: Masami Hiramatsu
Date: Fri Feb 22 2019 - 09:58:16 EST


On Fri, 22 Feb 2019 10:10:20 +0100
Juerg Haefliger <juerg.haefliger@xxxxxxxxxxxxx> wrote:

> echo -e is not POSIX. Depending on what /bin/sh is, we can get
> incorrect output like:
> $ -e -n [1] Basic trace file check
> $ -e [PASS]
>
> Fix that by using printf instead.
>
> Signed-off-by: Juerg Haefliger <juergh@xxxxxxxxxxxxx>

Looks good to me.

Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>

Thanks!

> ---
> tools/testing/selftests/ftrace/ftracetest | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest
> index fc755e1b50f1..20c9c0ad8682 100755
> --- a/tools/testing/selftests/ftrace/ftracetest
> +++ b/tools/testing/selftests/ftrace/ftracetest
> @@ -173,8 +173,13 @@ strip_esc() {
> }
>
> prlog() { # messages
> - echo -e "$@"
> - [ "$LOG_FILE" ] && echo -e "$@" | strip_esc >> $LOG_FILE
> + newline="\n"
> + if [ "$1" = "-n" ] ; then
> + newline=
> + shift
> + fi
> + printf "$*$newline"
> + [ "$LOG_FILE" ] && printf "$*$newline" | strip_esc >> $LOG_FILE
> }
> catlog() { #file
> cat $1
> --
> 2.19.1
>


--
Masami Hiramatsu <mhiramat@xxxxxxxxxx>