On Tue, Jan 27, 2015 at 01:36:41PM +0100, Lennart Poettering wrote: > On Thu, 22.01.15 13:54, Dimitri John Ledkov (dimitri.j.led...@intel.com) > wrote: > > > Is there a way to remove / override wants that are specified via > > .wants directory, .d snippet with "Wants=", or wants specified in the > > unit itself? > > Dependencies are always additive and coalescing currently. We don't > track which configuration file or automatic logic created which > dependency, and hence it is not really possible right now do reset the > list of dependencies: we wouldn't know what to reset and what > not. Note that in many cases dependencies can be created from "both > sides", and if A wants some dependency on B, and B also wants it from > A, then we coalesce it one. If now some configuration in A wants to > reset its setting, what do we do with the request from B? Yes, I think attempting any kind of dependency removal *from loaded units* would be very complicated, and would require major surgery to current unit engine. And things would become conceptually more complicated, which we certainly don't need.
But masking of .wants/ links is something different I think. It is a *localized* modification to a single configuration file. We currently allow overridding of almost all configuration (units files, files in .d directories, recently even generators), but .wants and .requires are an exception. I think we should allow this. Apart from current use case, it would things more consistent for the user. For --user mode this is actually the only unprivileged way to achieve complete overriding of system supplied units, so I'm convinced we should allow this. Zbyszek > When we designed this initially this way I wasn't sure this would > suffice, but I kinda like the simplicity of this, and interestingly > you are the first one who wants to reset dependencies again. Which > makes me wonder if we canot find a better solution for this? > > > I thought that creating a symlink to /dev/null from a higher up > > directory would disable wants dependency but it didn't: > > > > e.g.: > > I was expecting for > > /run/systemd/system/getty.target.wants/getty@tty1.service -> > > /dev/null > > Wat precisely is the reason for trying to do this? What are you trying > to do here, and why? > > > So, is there a way to unwant something, as an override? > > Nope, currently there isn't. > > Lennart > > -- > Lennart Poettering, Red Hat > _______________________________________________ > systemd-devel mailing list > systemd-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/systemd-devel _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
