Date: Thu, 5 Jan 2006 22:09:03 +1030 From: Malcolm Kay <malcolm.kay@internode.on.net> To: user <user@dhp.com> Cc: freebsd-questions@freebsd.org Subject: Re: how can I find out which md device I just used ? (mdconfig) Message-ID: <200601052209.03310.malcolm.kay@internode.on.net> In-Reply-To: <Pine.LNX.4.21.0601050122090.8684-100000@shell.dhp.com> References: <Pine.LNX.4.21.0601050122090.8684-100000@shell.dhp.com>
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On Thu, 5 Jan 2006 04:54 pm, user wrote:
> On Thu, 5 Jan 2006, Malcolm Kay wrote:
> > On my system (5.4) mdconfig reports the created device to
> > stdout: So:
> > memdevice=`mdconfig -a -t malloc -s10M`
> > sets the device name in $memdevice.
>
> Thank you very much - I have just verified that this works the
> same way on FreeBSD 6.0. I appreciate your help.
>
> I am curious, I am doing two things at one here - setting the
> variable _and_ configging the md device. What is the best
> way, in a shell script, to also test to make sure that the
> device configured properly ?
>
> If the device does not configure properly, all I see is that I
> get a empty variable ... would it be appropriate to `text -z`
> that variable to see if it is zero ? Or is there a better way
> to approach that ?
>
I imagine that like most unix utilities it returns status 0 on
success and non-zero on failure.
So imediately after:
memdevice=`mdconfig -a -t malloc -s10M`
Use:
if [ $? -ne 0 ]
then
echo "mdconfig failed"
exit 1
fi
Malcolm Kay
> Basically I do not want to act unless I am sure that the
> mdconfig actually happened, and there really is a variable
> defined...
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