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List:       busybox
Subject:    Re: [PATCH] new applet gethostbyname
From:       Laurent Bercot <ska-dietlibc () skarnet ! org>
Date:       2012-07-08 23:50:37
Message-ID: 20120708235037.GA21401 () skarnet ! org
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> Quick fix, major absolutely correct:
> 
> /etc/nsswitch contains line:
> 
> hosts: files dns
> 
> /etc/host.conf contains:
> 
> order hosts, bind

 Ah, yes, I confused the syntaxes, sorry about that.

 /etc/nsswitch.conf indeed contains something like "hosts: files dns"
to configure NSS.

 The thing is that libresolv, the BIND DNS client library, *also* adds
a compatibility layer to /etc/hosts, in case someone doesn't want to use
NSS *but* still wants a /etc/hosts file for local DNS definitions.
/etc/host.conf is a configuration file for the libresolv, and
"order hosts, bind" means that DNS queries will first be answered using
the data in /etc/hosts if possible, and fall back on real DNS mechanisms
otherwise.
 Compatibility layer on compatibility layer!

 Conclusion: for direct DNS access, use the djbdns command-line tools,
the djbdns client library, or my client library. Less bloat, less
complexity, better interfaces. :P

-- 
 Laurent
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