From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Andrew Bird (Sphere Systems)" <ajb@spheresystems.co.uk>
Subject: Re: piping escape into dosemu
Date: Thu, 11 Mar 2010 09:19:04 +0000
Message-ID: <201003110919.04676.ajb@spheresystems.co.uk>
References: <4B918324.6000308@sbcglobal.net> <4B9893EC.70401@sbcglobal.net> <ca6f72e21003110111n386a7260je3244d24b51245b8@mail.gmail.com>
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To: TW <zupftom@googlemail.com>
Cc: Mike McCarty <Mike.McCarty@sbcglobal.net>, FreeDOS <linux-msdos@vger.kernel.org>

Hi TW,
	You might want to investigate the command 'printf', it's rarely implem=
ented=20
by the shell and has consistent behaviour (no implicit NL etc) across=20
different platforms. For that reason many shell script writers shy away=
 from=20
echo and use printf instead. See man 1 printf for details.


Hope that helps,


Andrew

On Thursday 11 March 2010, TW wrote:
> 2010/3/11 Mike McCarty <Mike.McCarty@sbcglobal.net>:
> > In fact...
> >=20
> > $ echo -ne "\033" | od -x
> > 0000000 001b
> > 0000001
> >=20
> > So, od got exactly one character, which was an ESC.
>=20
> O.K., one more pitfall.  Obviously, the shells use their own internal
> echo and don't call /bin/echo.  sh and dash give me
>=20
> $ echo -ne "\033" | od -x
> 0000000 6e2d 2065 0a1b
> 0000006
>=20
> i.e. echo is actually echoing the switch "-ne", followed by a space,
> ESC and newline.  In bash, I get
>=20
> tom@tom-desktop:~$ echo --version
> --version
> tom@tom-desktop:~$ /bin/echo --version
> echo (GNU coreutils) 7.4
> Copyright =A9 2009 Free Software Foundation, Inc.
> Lizenz GPLv3+: GNU GPL Version 3 oder h=F6her
> <http://gnu.org/licenses/gpl.html> Dies ist freie Software: Sie k=F6n=
nen sie
> =E4ndern und weitergeben.
> Es gibt keinerlei Garantien, soweit wie es das Gesetz erlaubt.
>=20
> Geschrieben von Brian Fox und Chet Ramey.
>=20
> I'll be using /bin/echo now to make sure the same echo is used in bas=
h and
> sh. --
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