Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Mon, 23 Feb 2015 01:08:40 -0500
From: Rich Felker <>
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.


View attachment "nscd-addl-changes.diff" of type "text/plain" (3391 bytes)

View attachment "fake-nscd.c" of type "text/plain" (676 bytes)

Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.