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Description of problem:
Upstream libc recently gained the possibility to merge group members from different Name Service modules. We should backport this feature to RHEL.

This would mainly enable deployments that depend on centralized directories to define members of well-known local groups (like wheel) in the centralized directory in addition to local files

Version-Release number of selected component (if applicable):
Whatever will be in RHEL-7.3

How reproducible:
always

Steps to Reproduce
1. set "group: files [SUCCESS=merge] sss" in nsswitch.con
2. define a group wheel in IPA or AD
3. getgrnam(wheel)

Actual results:
only local members are returned

Expected results:
getgrnam returns both members of the local wheel group as well as the members defined in the remote directory are returned


Additional info:
The related upstream bugzilla is https://sourceware.org/bugzilla/show_bug.cgi?id=19072

Cockpit would also benefit from this feature.

*** Bug 1204503 has been marked as a duplicate of this bug. ***

To clarify, the patch has not been accepted yet upstream.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:1916