On Wed, Mar 07, 2018 at 10:28:58AM +0000, Tom Hughes wrote:
> On 07/03/18 10:10, Florian Weimer wrote:
> >On 03/06/2018 03:24 PM, Zbigniew Jędrzejewski-Szmek wrote:
> >>It's a very simple tool to create system users and group in /etc/passwd.
> >>It just creates entries in/etc/{passwd,group,shadow}, and does not
> >>interact with audit in any way afaik.
> >
> >Does it perform any locking or cache invalidation?
> It appears to do locking:
> https://github.com/systemd/systemd/blob/master/src/sysusers/sysusers.c#L1953
> which is calling:
> https://github.com/systemd/systemd/blob/master/src/basic/user-util.c#L548
> which takes a write lock on /etc/.pwd.lock around everything.

Cache invalidation? I'm not sure what you mean, it just replaces the
file atomically and syncs the file system.

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