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Subject: Re: [ANNOUNCEMENT] Updated: bash-4.3.39-2
To: cygwin AT cygwin DOT com
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From: Eric Blake <eblake AT redhat DOT com>
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Message-ID: <56098B80.8070301@redhat.com>
Date: Mon, 28 Sep 2015 12:48:32 -0600
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On 09/28/2015 10:48 AM, Mikhail Usenko wrote:
> On Mon, 28 Sep 2015 08:56:14 -0600
> Eric Blake <...> wrote:
>>
>> 'echo -n' and 'echo -e' are non-portable (even in bash; because I can
>> use 'shopt -s xpgecho' to get POSIX-mandated behavior).  Use 'printf'
>> instead.
>>
>=20
> xpg_echo doesn't change 'echo -ne' behavior

xpg_echo in isolation does not, and POSIXLY_CORRECT in isolation does
not, but together they DO affect echo:

$ bash -c 'echo -n hi'
hi
$ bash -c 'shopt -s xpg_echo; echo -n hi'
hi
$ bash -c 'POSIXLY_CORRECT=3D1; echo -n hi'
hi
$ bash -c 'POSIXLY_CORRECT=3D1; shopt -s xpg_echo; echo -n hi'
-n hi

--=20
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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