Date: Mon, 15 Feb 2010 08:55:08 +0200 From: Eray Aslan <eray.aslan@caf.com.tr> To: freebsd-questions@freebsd.org Subject: Re: simple (and stupid) shell scripting question Message-ID: <4B78EFCC.2010102@caf.com.tr> In-Reply-To: <560f92641002142207w7eade79fr6a4f40ae5b92f4b9@mail.gmail.com> References: <560f92641002142207w7eade79fr6a4f40ae5b92f4b9@mail.gmail.com>
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On 15.02.2010 08:07, Nerius Landys wrote:
> DIRNAME="`dirname \"$0\"`"
> cd "$DIRNAME"
> SCRIPTDIR="`pwd`"
>
> What if I got rid of extra double quotes? Like this:
>
> DIRNAME=`dirname \"$0\"`
> cd "$DIRNAME"
> SCRIPTDIR=`pwd`
>
> Does this behave any differently in any kind of case? Are thes double
> quotes just superfluous?
>From the man page:
Command Substitution
[...]
If the substitution appears within double quotes, word splitting and
pathname expansion are not performed on the results.
In other words:
sh-4.0$ touch "x y"
sh-4.0$ for i in `ls`; do echo "$i"; done
x
y
sh-4.0$ for i in "`ls`"; do echo "$i"; done
x y
sh-4.0$
--
Eray
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