From: Florian Weimer <fw@deneb.enyo.de>
To: Glenn Golden <gdg@zplane.com>
Cc: libc-help@sourceware.org
Subject: Re: getent ahostsv4 seems to interact with network interface addressing
Date: Sun, 05 Nov 2023 21:10:50 +0100 [thread overview]
Message-ID: <875y2ggdv9.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: <ZUZF7JMvAILKhosE@huh.zplane.com> (Glenn Golden's message of "Sat, 4 Nov 2023 07:23:56 -0600")
* Glenn Golden:
> System:
> Arch linux, glibc 2.38-7, kernel 6.1.59-1, commodity i686 laptop.
>
> Description of issue:
> Not sure if this is a bug or just a misunderstanding on my part as to how
> getent ought to be behaving when attempting lookups using the ahostsv4
> database, expecting it to query and return results from /etc/hosts.
>
> The behavior of "getent ahostsv4 HOSTNAME" seems to strangely depend on
> whether there are any network interfaces presently having an assigned v4
> address, as demonstrated in detail in "Steps to reproduce" below.
By default, getent uses AI_ADDRCONFIG under the covers, and what you
see is the expected behavior of that getaddrinfo option. Recent glibc
versions have a getent option that switches of AI_ADDRCONFIG:
-A, --no-addrconfig do not filter out unsupported IPv4/IPv6 addresses
(with ahosts*)
next prev parent reply other threads:[~2023-11-05 20:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-04 13:23 Glenn Golden
2023-11-05 20:10 ` Florian Weimer [this message]
2023-11-06 0:43 ` Glenn Golden
2023-11-06 5:58 ` Florian Weimer
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