On Thu, Aug 9, 2012 at 5:31 AM, Mark Kettenis <mark.kette...@xs4all.nl> wrote:
>> Date: Thu, 9 Aug 2012 11:30:13 +0200
>> From: Landry Breuil <lan...@rhaalovely.net>
...
>> in the context of https://bugzilla.mozilla.org/show_bug.cgi?id=781461
>> i've stumbled upon the following issue:
>> (our pdksh)
>>
> $FOO=1
>> $cat <<EOF
>> > echo ${FOO:+'blah'aa}
>> > EOF
>> echo blahaa
>>
>> bash-4.2# FOO=1
>> bash-4.2# cat <<EOF
>> > echo ${FOO:+'blah'aa}
>> > EOF
>> echo 'blah'aa
>>
>> Apparently the ksh from solaris, hpux and debian don't strip the quotes
>> in that usecase, and none of the other shells do (bash, dash, zsh...)
>>
>> So maybe it can be considered as a bug in our pdksh..
>
> I think it is. POSIX says in 2.6.2 Parameter Expansion that:
>
> "...word shall be subjected to tilde expansion, parameter expansion,
> command substitution, and arithmetic expansion."
>
> which suggests that quote removal isn't supposed to happen.
I agree. The bug applies to the simple double-quoted case too:
$ foo=1
$ echo "${foo:+'blah'}"
blah
$
The correct output there should include the single-quotes, ala:
'blah'
Philip Guenther
