Re: how to use exec and expr

From: "Ming-Ching Tiew" <mingching.tiew@redtone.com>
To: <freeradius-users@lists.freeradius.org>
Sent: Tuesday, April 19, 2005 12:53 PM
Subject: how to use exec and expr


>
> I have exec and expr included in the instantiate{}. Then
> in mssql.conf, somewhere in the middle I do this :-
>
> Acct-Authentic = `%{exec: /bin/echo 123}`
>
> Then I checked the database and the log files, the values
> for Acct-Authentic did not change accordingly. What am
> I doing wrong ? I must be understanding something wrongly .....
>

OK I got the attribute changed by using attr_rewrite instead,
for example,

attr_rewrite getip
{
attribute = Acct-Session-Id
# search for IP address aaa.bbb.ccc.ddd
searchfor = ".*[^0-9]\(\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}\).*"
replacewith = "\\1"
append = no
}

The problem I have is the replacewith string. The way I understand it is
that the replace with is a static string. In my case, I would like to
looking for a match in the string, strip everything else except the
matched string.

In shell script, it is something like this :-

.... | sed -e 's/^.*[^0-9]\(\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}\).*$/\1/'

Note the \1 in the sed command, it strips everything except the matched.
How to do this using the attri_rewrite scheme ?

Cheers




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