[Bug nscd/16878] nscd enters busy loop on long netgroup entry via nss_ldap of nslcd

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https://sourceware.org/bugzilla/show_bug.cgi?id=16878

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c3ec475c5dd16499aa040908e11d382c3ded9692

commit c3ec475c5dd16499aa040908e11d382c3ded9692
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date:   Mon May 26 11:40:08 2014 +0530

    Use NSS_STATUS_TRYAGAIN to indicate insufficient buffer (BZ #16878)

    The netgroups nss modules in the glibc tree use NSS_STATUS_UNAVAIL
    (with errno as ERANGE) when the supplied buffer does not have
    sufficient space for the result.  This is wrong, because the canonical
    way to indicate insufficient buffer is to set the errno to ERANGE and
    the status to NSS_STATUS_TRYAGAIN, as is used by all other modules.

    This fixes nscd behaviour when the nss_ldap module returns
    NSS_STATUS_TRYAGAIN to indicate that a netgroup entry is too long to
    fit into the supplied buffer.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                    |    8 ++++++++
 NEWS                         |    6 +++---
 nscd/netgroupcache.c         |   14 ++++++++------
 nss/nss_files/files-netgrp.c |    2 +-
 4 files changed, 20 insertions(+), 10 deletions(-)

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