Date: Sat, 02 Aug 2008 18:37:35 +0100 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: Redd Vinylene <reddvinylene@gmail.com> Cc: freebsd-jail@freebsd.org, questions@freebsd.org Subject: Re: jail_box_ip="<insert hundreds of ips here>" Message-ID: <48949B5F.4070300@infracaninophile.co.uk> In-Reply-To: <f1019d520808021008r55b83507ia755b945d95a4345@mail.gmail.com> References: <f1019d520808021008r55b83507ia755b945d95a4345@mail.gmail.com>
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Redd Vinylene wrote:
> Hey, I got a couple of hundred IPs, is there an easy way to add them
> all to jail_box_ip="ip1,ip2,ip3" without making like the longest line
> ever?
>
> Like this?
>
> jail_box_ip="66.252.2.4,\
> 66.252.2.5,\
> 66.252.2.6,\
>
> Unfortunately that doesn't look too good.
>
> Nor does:
>
> export x=$(cat ips);export jail_ips=''; for ip in $x; do export
> jail_ips="$jail_ips,$ip"; done; export jail_ips=$(echo $jail_ips | sed
> s/,$/''/ | sed s/^,//);
>
> Is there a more beautiful alternative?
/etc/rc.conf is just /bin/sh code. All you need to do is set
the variables -- usually by assigning a static string, but you
can use whatever constructs you want. Well - within reason. Making
something as critical as the system boot process depend on a bunch of
other files or processes is not a good idea on the whole.
You can include multi-line whitespace in the variables by using single
quotes:
jail_box_ip='66.252.2.4,
66.252.2.5,
66.252.2.6,
66.252.2.7'
Assuming that the init script that processes this data isn't phased
by the inclusion of a bit of whitespace.
Or you can generate the required numbers, assuming they are
consecutive:
jail_box_ip=$( jot -w "66.252.2.%d" -s "," 5 4 )
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
Kent, CT11 9PW
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