Date: Wed, 25 Jan 2006 01:19:18 -0500 (EST) From: Ensel Sharon <user@dhp.com> To: Luke Bakken <luke.bakken@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: shell scripting question (mdconfig device choosing) Message-ID: <Pine.LNX.4.21.0601250117150.8684-100000@shell.dhp.com> In-Reply-To: <6acc6ca40601241935h290738e1scee8af44dc144224@mail.gmail.com>
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Luke,
On Tue, 24 Jan 2006, Luke Bakken wrote:
> > Yeah, but I am looking for "0" ... 8,9,11,14 are all in use ... but 0-7
> > are not. I want to:
> >
> > "starting with zero, find the lowest number that is NOT in this list"
> >
> > (where "this list" is the output of mdconfig -l, which shows which md
> > devices are currently in use)
>
> Running mdconfig -l I don't get any output, however this works, it'll
> find the first unused number up to 25 in that list.
>
> echo '8 9 11 14' | perl -ane'@h{@F}=(1)x@F;for(0..25){if(not defined
> $h{$_}){print qq($_\n);exit}}'
>
> If you can give me the exact output of mdconfig -l, I can modify this for you.
Thank you very much - you got no output because you have no md devices in
use. I have a few in use and this is the output I get:
# mdconfig -l
md3 md2 md1 md0
But I could just as easily get:
# mdconfig -l
md9 md8 md5 md3
Hmm...I just saw that that line is in perl, and I do not have perl
installed on any of my 6.0 machines ... I am not sure I want to install it
just for this one shell script :(
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