Re: [bug?] echo -n does not work as described

[Kevin Korb <kmk@xxxxxxxxxxxxxx>]

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For future reference, I did some reading in Gentoo's bugzilla...

Apparently the Gentoo devs broke dash's echo -n on purpose.  Their
intention is to cause any shell script that is called with /bin/sh to
fail if the script uses echo -n.  However, they didn't limit this
behaviour to dash as /bin/sh as it happens as /bin/dash too and they
didn't modify the man page and they didn't break bash this way.

So, I am calling this a stupid Gentooism and I am forking their ebuild
for my own systems with that patch commented out.

On 11/12/2015 11:18 AM, Kevin Korb wrote:
> AHA!  Now we are getting somewhere.  I compiled dash myself and it 
> behaved properly.  I then tracked my problem to this Gentoo patch: 
> https://gitweb.gentoo.org/repo/gentoo.git/tree/app-shells/dash/files/d
as
>
> 
h-0.5.8.1-dumb-echo.patch
> 
> So, apparently my problem is with Gentoo not dash.  Thanks for
> helping me figure that out.
> 
> On 11/12/2015 05:03 AM, Petr Šabata wrote:
>> On Wed, Nov 11, 2015 at 08:56:02PM -0500, Kevin Korb wrote:
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>>> 
>>> I am on dash version 0.5.8.2 on Gentoo Linux (USE=libedit 
>>> -static).
>>> 
>>> The echo builtin does not work as described.  In the man page:
>>>  echo [-n] args... Print the arguments on the standard output, 
>>> separated by spaces. Unless the -n option is present, a
>>> newline is output following the arguments.
>>> 
>>> However, in actual usage: % dash $ echo testing testing $ echo
>>> -n testing - -n testing $ /bin/echo -n testing testing$
>>> 
>>> This is causing me problems when I attempt to switch /bin/sh
>>> from bash to dash.
> 
>> Hmm, where does the 0.5.8.2 version come from, I wonder? The
>> latest release is 0.5.8 [0] and I cannot reproduce your issue
>> with it on Fedora [1] (and note that, afaik, Fedora doesn't apply
>> any special patches that could affect this behavior).
> 
>> Try rebuilding dash with USE=-libedit and see if it changes 
>> anything.  If not -- I would bug the Gentoo maintainers.
> 
>> P
> 
>> [0] http://gondor.apana.org.au/~herbert/dash/ [1] 
>> dash-0.5.8-3.fc23.x86_64
> 
> 
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