Date: Tue, 15 Jul 2008 14:50:24 -0700 From: Gary Kline <kline@thought.org> To: David Kelly <dkelly@hiwaay.net> Cc: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>, FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: why is this script failing? Message-ID: <20080715215024.GA82902@thought.org> In-Reply-To: <20080715190224.GC21840@Grumpy.DynDNS.org> References: <20080714201241.GA22443@thought.org> <20080715073651.P1638@wojtek.tensor.gdynia.pl> <20080715183500.GA76088@thought.org> <20080715190224.GC21840@Grumpy.DynDNS.org>
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On Tue, Jul 15, 2008 at 02:02:24PM -0500, David Kelly wrote:
> On Tue, Jul 15, 2008 at 11:35:00AM -0700, Gary Kline wrote:
> > On Tue, Jul 15, 2008 at 07:37:02AM +0200, Wojciech Puchar wrote:
> > > >
> > > > why is this script not finding them?
> > > >
> > > >
> > > >wav=/tmp/kde-kline/\*wav\*
> > >
> > > why you put \ before *
> >
> > to allow the shell to catch various formsof strings with "wav"
> > embedded.
>
> I questioned that escape earlier.
>
> Without the \ escape the variable ${wav} will contain all the files
> matching the pattern. But with the escape it will literally be
> "/tmp/kde-kline/*wav*". Wildcard expansion doesn't occur until later
> when Gary does something like this:
>
> rm ${wav}
>
> which is processed as if he had just now typed:
>
> rm /tmp/kde-kline/*wav*
>
> while without the escape it might appear like this:
>
> rm /tmp/kde-kline/file1.wav /tmp/kde-kline/file2.wav
>
> Is probably best to postpone wildcard expansion until the last moment
> because if any of the filenames contain spaces the space will probably
> cause a break between arguments. The first time the wildcard expands to
> a filename with a space the space will be escaped. But the second time
> you use it that escape is lost. So its best to expand it in the place
> its needed.
>
thanks for this clarification! until yesterday, whe you
mmentioned blanks[whitespace], as id a song title, i hadn't
tought about songs like "Not Ready to Make Nice.ogg" e.g.
I am not sure why these players store the song in wav format
without deleting the files, but when my limited /tmp is full,
certain aps fail mysteriously. with a fwdozen more line of code
they could at least fail more gracefully.
-g
> --
> David Kelly N4HHE, dkelly@HiWAAY.net
> ========================================================================
> Whom computers would destroy, they must first drive mad.
--
Gary Kline kline@thought.org www.thought.org Public Service Unix
http://jottings.thought.org http://transfinite.thought.org
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