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Message-ID: <20150223060840.GB23507@brightrain.aerifal.cx>
Date: Mon, 23 Feb 2015 01:08:40 -0500
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: [PATCH] support alternate backends for the passwd and
group dbs
On Sun, Feb 22, 2015 at 08:58:10PM -0600, Josiah Worcester wrote:
> when we fail to find the entry in the commonly accepted files, we
> query a server over a Unix domain socket on /var/run/nscd/socket.
> the protocol used here is compatible with glibc's nscd protocol on
> most systems (all that use 32-bit numbers for all the protocol fields,
> which appears to be everything but Alpha).
I'm committing with the attached additional changes amended in as
discussed on #musl. With these changes it at least passes the
following checks:
- With no nscd running, lookups return negative with no error.
- With bad nscd running and dropping connections with no reply,
reverse-endian fallback code retries the query and then fails with
EIO indicating inability to provide a definitive negative answer.
- Replies that don't match the query produce EIO.
- Replies that do match the query produce successful results.
Tested using the attached fake-nscd.c. This code still needs further
testing before release to ensure that we're not introducing
significant bugs.
Rich
View attachment "nscd-addl-changes.diff" of type "text/plain" (3391 bytes)
View attachment "fake-nscd.c" of type "text/plain" (676 bytes)
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