Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Date: Fri, 25 Mar 2005 14:19:06 -0500 (EST)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Eric Blake <ericblake AT comcast DOT net>
cc: cygwin AT cygwin DOT com
Subject: Re: base-files patch
In-Reply-To: <032520051834.18021.424459B2000099DD0000466522058891160A050E040D0C079D0A@comcast.net>
Message-ID: <Pine.GSO.4.61.0503251417170.9662@slinky.cs.nyu.edu>
References: <032520051834 DOT 18021 DOT 424459B2000099DD0000466522058891160A050E040D0C079D0A AT comcast DOT net>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

On Fri, 25 Mar 2005, Eric Blake wrote:

> >  In fact, in this particular case,
> > it's probably better to use "``" instead of `""`, IMO.
>
> No, "`echo $0|tr ...`" does the wrong thing if $0 is "two spaces/sh" (it
> passes just one space to tr, instead of two), while `echo "$0"|tr ...`
> works correctly.

In *this particular* case, the value will be compared with a constant set
of space-free values, so the number of spaces doesn't matter -- it still
won't match any values from that set...  :-)
In general you're correct -- quoting is a way of preserving spaces, among
other things.
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"The Sun will pass between the Earth and the Moon tonight for a total
Lunar eclipse..." -- WCBS Radio Newsbrief, Oct 27 2004, 12:01 pm EDT

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/