Re: bash syntax

[Charles Menzes <charles@lunarmedia.net>]

okay, so -z only checks to see if the variable has zero-length. that
definitely makes a lot of sense. 

On Tue, 20 Jun 2000, Steven Pritchard wrote:

> 
> Erving Blake said:
> > I tried your script... wont work for me either because the "-z" is
> > checking for a FILE THAT ALREADY EXISTS having zero length.
> 
> No, actually, it really only checks the variable.
> 
>     osiris:~$ foo="" ; if [ -z "$foo" ]; then echo "foo" ; fi
>     foo
>     osiris:~$ foo="foo" ; if [ -z "$foo" ]; then echo "foo" ; fi
>     osiris:~$ 
> 
> BTW, for reference, the opposite of -z is -n.
> 
> Steve
> -- 
> steve@silug.org           | Linux Users of Central Illinois
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> Steven Pritchard          | http://www.luci.org/ for more info
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