From mboxrd@z Thu Jan  1 00:00:00 1970
From: pawa <pawa@tormail.net>
Subject: Re: tag process's future sockets for iptables rules?
Date: Sat, 22 Oct 2011 23:28:34 +0000
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> >| netfilter_add_tag("public-addresses-proxied-via-tor");
> >| netfilter_add_tag("internal-addresses-directly");
> >| netfilter_remove_tag("proxy-dns");
> >| execlp("wget", ...);
>
> A socket option, SO_MARK, for use with setsockopt/getsockopt.

but setsockopt is per socket. i'm looking for something that is
per process (and inherited by children - in the example, wget).
this is to replace what i do at the moment, namely

| setgid(123);
| execlp("wget", ...);

and

# iptables ... -m owner --gid-owner 123 ...