Mailinglist Archive: opensuse-features (120 mails)

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[New: openFATE 310922] central system user registry
  • From: fate_noreply@xxxxxxx
  • Date: Thu, 2 Dec 2010 16:13:54 +0100 (CET)
  • Message-id: <feature-310922-1@xxxxxxxxxxxxxx>
Feature added by: Ludwig Nussel (lnussel)

Feature #310922, revision 1
Title: central system user registry

openSUSE-11.4: Unconfirmed
Priority
Requester: Important

Requested by: Ludwig Nussel (lnussel)
Partner organization: openSUSE.org

Description:
Once upon a time all systems users were defined in aaa_base via the default
/etc/passwd file. When the uid space below uid 100 got too small a new dynamic
range between 100 and 499 was introduced. So nowadays packages dynamically
create a user in %pre which gets a random uid in this range. Disadvantage: uids
are different on every system. Usually this is not a problem but for programs
that export files over the network it is. TV recordings made by VDR for
example. useradd has a --preferred-uid option for such cases. It's possible to
specify a uid and useradd tries to use it. If it's already taken another one is
chosen.

Thefore I'd propose to leverage that feature: - introduce a central uid
registry for system users, e.g a file in aaa_base - lower SYSTEM_UID_MAX
(/etc/login.defs) to e.g. 349 and assign "preferred uids" in the rage 350-499.
- change useradd calls in packages to a macro that transparently decides
whether a preferred uid needs to be used.

Use Case:
- two systems running vdr, one for recording, the other one for playback on a
TV want to share recordings via nfs.

--
openSUSE Feature:
https://features.opensuse.org/310922

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