Re: [gentoo-dev] Re: [gentoo-commits] gentoo-x86 commit in x11-libs/qt: ChangeLog qt-4.3.2.ebuild

[Roy Marples <uberlord@gentoo.org>]

On Thu, 2007-10-04 at 05:03 +0100, Steve Long wrote:
> Donnie Berkholz wrote:
> 
> > spec=$(echo ${CHOST} | cut -d- -f3)
> > 
> You can do this without resort to an external process:
> IFS=-
> read _ _ spec _ <<< "$CHOST"
> unset IFS
> - or you can do:
> IFS=-
> arr=($CHOST)
> unset IFS
> spec=${arr[2]}

See, another use of bash arrays just because you can?
IFS=-
set -- ${CHOST}
spec=$2

Works fine in bash - and other shells.

You need to preserve IFS when changing it, however. Unless of course,
you're doing this in a function so you can just local IFS=-

Here's a snippet from b2's localmount init script.

IFS=${IFS} SIFS=${IFS-y}
FS=$IFS:
for x in ${NO_UMOUNTS} ${RC_NO_UMOUNTS} ; do
   no_umounts="${no_umounts}|${x}"
one
if [ "${SIFS}" = "y" ] ; then
   IFS=$OIFS
else
   unset IFS
fi

Thanks

Roy

-- 
gentoo-dev@gentoo.org mailing list