sgifford at suspectclass
Oct 13, 2003, 10:50 PM
Post #2 of 2
(969 views)
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Re: How to include value of an environment variable in a tcp rule
[In reply to]
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Sagara Wijetunga <sagaralists[at]yahoo.com> writes:
> Hi all
>
> The tcpserver program sets up several environment
> variables (eg. $TCPLOCALIP, TCPREMOTEIP, etc.) for TCP
> connections.
>
> Is it possible to include the value of an environment
> variable in a tcp rule to create a new environment
> variable?
>
> Eg.
> :allow,NEWVAR="something/Value of
> $TCPLOCALIP/something"
[...]
Not this way, but you can accomplish this by having tcpserver call a
wrapper script. For example, if you're currently running
tcpserver 0 25 /var/qmail/bin/qmail-smtpd
you could change it to
tcpserver 0 25 /var/qmail/bin/env-wrapper /var/qmail/bin/qmail-smtpd
and have env-wrapper be a short shell script like this:
#!/bin/sh
NEWVAR="something/$TCPLOCALIP/something"
export NEWVAR
exec "$@"
----ScottG.
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