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From: Robin Bowes <robin-lists@robinbowes.com>
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Subject: Re: Help with chpst -e
Date: Mon, 14 Apr 2008 00:52:25 +0100
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Robin Bowes wrote:
> Hi,
> 
> Is it possible to set vars using "chpst -e" and then use those vars 
> later in the same command line?
> 
> e.g.
> 
> mkdir env
> echo dnslog > env/LOGUSER
> echo /var/log/dnscache > env/LOGDIR
> 
> Then in run:
> #!/bin/sh
> exec chpst -e ./env -u $LOGUSER svlogd -tt $LOGDIR
> 
> I realise that this specific example won't work - $LOGUSER and $LOGDIR 
> will both retain the values they had when the script was launched.
> 
> Is what I describe above possible?

Answer: yes it is.

This works:

#!/bin/sh
exec \
   chpst -e ./env  sh -c '
     chpst -u ${LOGUSER} \
     svlogd -tt ${LOGDIR}
'

LOGUSER and LOGDIR are set in ./env

R.