linux-kernel - Re: [PATCH] selftests/ftrace: Make the coloring POSIX compliant

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Date:   Wed, 20 Feb 2019 21:20:20 +0100
From:   Juerg Haefliger <juerg.haefliger@...onical.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Juerg Haefliger <juerg.haefliger@...onical.com>,
        linux-kernel@...r.kernel.org, mingo@...hat.com,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Shuah Khan <shuahkhan@...il.com>
Subject: Re: [PATCH] selftests/ftrace: Make the coloring POSIX compliant

On Wed, 20 Feb 2019 14:49:34 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Wed, 20 Feb 2019 17:13:33 +0100
> Juerg Haefliger <juerg.haefliger@...onical.com> wrote:
> 
> > echo -e and \e are not POSIX. Depending on what /bin/sh is, we can get
> > incorrect output like:  
> 
> I'm curious to which shell this is.

Quite frankly I don't know but that's the output we get when we run it in
Jenkins. I'll try to find out.


> > $ -e -n [1] Basic trace file check
> > $ -e 	[PASS]
> > 
> > Fix that by using \033 instead of \e and printf.
> > 
> > Signed-off-by: Juerg Haefliger <juergh@...onical.com>
> > ---
> >  tools/testing/selftests/ftrace/ftracetest | 17 +++++++++++------
> >  1 file changed, 11 insertions(+), 6 deletions(-)
> > 
> > diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest
> > index fc755e1b50f1..f200898e3e2c 100755
> > --- a/tools/testing/selftests/ftrace/ftracetest
> > +++ b/tools/testing/selftests/ftrace/ftracetest
> > @@ -161,10 +161,10 @@ color_green=
> >  color_blue=
> >  # If stdout exists and number of colors is eight or more, use them
> >  if [ -t 1 -a "$ncolors" -ge 8 ]; then
> > -  color_reset="\e[0m"
> > -  color_red="\e[31m"
> > -  color_green="\e[32m"
> > -  color_blue="\e[34m"
> > +  color_reset="\033[0m"
> > +  color_red="\033[31m"
> > +  color_green="\033[32m"
> > +  color_blue="\033[34m"
> >  fi
> >  
> >  strip_esc() {
> > @@ -173,8 +173,13 @@ strip_esc() {
> >  }
> >  
> >  prlog() { # messages
> > -  echo -e "$@"
> > -  [ "$LOG_FILE" ] && echo -e "$@" | strip_esc >> $LOG_FILE
> > +  newline="\n"
> > +  if [ "$1" = "-n" ] ; then
> > +    newline=
> > +    shift
> > +  fi
> > +  printf "$@...wline"
> > +  [ "$LOG_FILE" ] && printf "$@...wline" | strip_esc >> $LOG_FILE
> >  }
> >  catlog() { #file
> >    cat $1  
> 
> This should probably be split into two patches, as they are two
> different issues.

Will do.

...Juerg

 
> -- Steve


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