linux-kernel - Re: [PATCH v2] selftests/ftrace: Use printf for backslash included command

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Message-Id: <20200511230505.dc343ffa6ede2b45322e3965@kernel.org>
Date:   Mon, 11 May 2020 23:05:05 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     Shuah Khan <shuah@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Tom Zanussi <tom.zanussi@...ux.intel.com>,
        Li Philip <philip.li@...el.com>,
        Liu Yiding <yidingx.liu@...el.com>,
        Xiao Yang <yangx.jy@...fujitsu.com>,
        Andreas Schwab <schwab@...ux-m68k.org>
Subject: Re: [PATCH v2] selftests/ftrace: Use printf for backslash included
 command

On Mon, 11 May 2020 13:46:35 +0000
David Laight <David.Laight@...LAB.COM> wrote:

> From: Masami Hiramatsu
> > Sent: 11 May 2020 14:38
> > 
> > Hi Andreas and David,
> > 
> > OK, what about this fix?
> 
> No idea what it is trying to do or why.
> Just a way of avoiding the differences between SYSV and BSD /bin/echo.
> 
> IIRC Posix allows both behaviours (and probably others).

Ah, I got it. That's why POSIX said "the results are implementation-defined."

https://pubs.opengroup.org/onlinepubs/009695399/utilities/echo.html

Thank you!

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