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From: Charlie Brady <charlieb-supervision@budge.apana.org.au>
Newsgroups: gmane.comp.sysutils.supervision.general
Subject: Re: dnscache runs under daemontools, unable to bind (access denied)
 using runit
Date: Fri, 20 May 2005 13:22:52 -0400 (EDT)
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On Fri, 20 May 2005, Charles M. Gerungan wrote:

> -U user[:group]
>              envuidgid.   Set  the environment variables $UID and $GID to the
>              user's uid and gid.  If user is followed by a colon and a  group,
>              set $GID to the group's gid instead of user's gid.
>
> So the difference is that -u drops privileges before the program is invoked 
> and -U after?

-U doesn't do anything with privileges. It does exactly what the 
documentation says it does - it sets environment variables.

Read dnscache documentation for effect of any environment variable 
settings.

---
Charlie