Date: Tue, 11 Jun 2013 09:10:15 +0200 From: Christoph Kukulies <kuku@kukulies.org> To: lconrad@go2france.com Cc: freebsd-questions@freebsd.org Subject: Re: Bourne shell "if" syntax Message-ID: <51B6CD57.1030908@kukulies.org> In-Reply-To: <51b620a6.42f.2b6a6400.5605dcf0@go2france.com> References: <51b620a6.42f.2b6a6400.5605dcf0@go2france.com>
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On 10.06.2013 20:53, lconrad@go2france.com wrote:
>
>
> script fragment:
>
> PTR=`dig @some.dns +short +norec -x a.b.c.d`
>
> echo "$PTR"
>
> if [ "$PTR" == "" ] ; then
Use something like (== is wrong, btw.)
#!/bin/sh
if [ "X$1" = "X" ] ; then
echo foo
fi
--
Christoph
>
> echo "$PTR" >> /path/to/PTR_absent.txt
>
> fi
>
> ===========
>
> output for an IP:
>
>
> a-b-c-d.domain.net.
> [: a-b-c-d.domain.net.: unexpected operator
>
> thanks
> Len
>
>
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