[Bug 1303649] Re: systemd-logind spins in cgmanager_ping_sync()

[Serge Hallyn]

Actually the source of the problem is that I was calling
nih_dbus_setup(), which actually sets up the mainloop.  It is not needed
- as I thought it was - for making *_sync calls from cgmanager-
client.so.  So the right fix is to not call that.

Two comments on this.  First, nih_dbus_setup() seems misleadingly named,
though that may just be how I read it.  The comments above that function
are plenty clear and I should have seen those.

Second, the default nih dbus connection is a shared one, which always
does nih_dbus_setup().  So for anyone to use libcgmanager without a nih
mainloop, they  *must* use the dbus_connection_open_private().  We
should probably mention that somewhere  in the libcgmanager
documentation.

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https://bugs.launchpad.net/bugs/1303649

Title:
  systemd-logind spins in cgmanager_ping_sync()

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