From: Johannes Sixt <j.sixt@viscovery.net>
Date: Thu, 29 Nov 2007 07:39:52 GMT
Subject: Re: [PATCH v2] Replace instances of export VAR=VAL with VAR=VAL; export VAR
Message-ID: <474E6CC8.8000301@viscovery.net>
In-Reply-To: <85sl2q6kyu.fsf@lola.goethe.zz>

David Kastrup schrieb:
> Junio C Hamano <gitster@pobox.com> writes:
>> I thought somebody already mention that ash mishandles "export VAR=VAL"
>> but otherwise Ok.
> 
> dak@lola:~$ ash
> $ export JUNK=woozle
> $ sh -c 'echo $JUNK'
> woozle
> $ exit
> dak@lola:~$ dash
> $ export JUNK=woozle
> $ sh -c 'echo $JUNK'
> woozle
> $ exit
> 
> What problem are we talking about exactly, and with what shell?

$ export foo="bar    baz"
$ bash
bash$ export JUNK=$foo
bash$ sh -c 'echo "$JUNK"'
bar    baz
bash$ exit
exit
$ ash
ash$ export JUNK=$foo
ash$ sh -c 'echo "$JUNK"'
bar
ash$ exit

The problem is $foo not being quoted on the RHS of the assignment of the 
export command: bash doesn't word-split, but ash does. Hence, *if*
export VAR=VAL is used, always quote VAL.

-- Hannes