Hi Eric,
* Eric Blake wrote on Mon, Aug 30, 2010 at 06:41:47PM CEST:
> On 08/27/2010 01:24 PM, Eric Blake wrote:
> >- tmp=
> >+ tmp= ac_tmp=
> > trap 'exit_status=$?
> >- { test -z "$tmp" || test ! -d "$tmp" || rm -fr "$tmp"; }&& exit
> >$exit_status
> >+ { test ! -d "${ac_tmp:=$tmp}" || rm -fr "$ac_tmp"; }&& exit $exit_status
>
> And then I promptly used it incorrectly. Per what we just
> documented, we cannot assume that ${a=b} takes effect in the parent
> shell if we are executing a child command like test
I don't follow this. Surely that Posix reference hints at
http://austingroupbugs.net/view.php?id=255
and is meant for assignments *before* commands only, as in for example
ac_tmp=$tmp test ! -d "$ac_tmp"
but not the code above.
Can you help me understand?
Thanks,
Ralf
