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Re: bash "while do echo" can't function correctly

From: Greg Wooledge
Subject: Re: bash "while do echo" can't function correctly
Date: Wed, 13 Apr 2016 08:29:00 -0400
User-agent: Mutt/

On Wed, Apr 13, 2016 at 06:49:51AM -0500, John McKown wrote:
> ???Ah. Thanks. I only use BASH and the GNU infrastructure, so I have never
> run into that problem. I think I'll change my habits, just in case I run
> across a system which doesn't have it (especially in my scripts)

Every implementation of echo has *some* input on which it fails,
including bash's implementation.

imadev:~$ type echo
echo is a shell builtin
imadev:~$ x=-n
imadev:~$ echo "$x"
imadev:~$ printf '%s\n' "$x"

You simply hadn't run into any of the failure cases yet.

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