I'm having trouble getting my head round how hotplugged device
activation should work with systemctl enable/disable.
I have a udev rule that uses ENV{SYSTEMD_WANTS}="foo@%k.service" to hook
device hotplug to systemd and a template unit file for foo@.service that
uses BindTo=dev-%i.device to ensure the service starts and stops
properly and ExecStart=/bin/foo /dev/%i to actually manage the device.
This all works fine, but how do I allow the administrator to
enable/disable this facility with systemctl? The cups example uses an
indirection via cups.target, but this indirection only works because a
template is not being used and a single cupsd manages all printer
devices. The getty@ service can be enabled/disabled on a per-tty basis,
but I want to enable/disable for all potential hotplugged devices, not
ones I know the name of in advance (and I don't really understand how
the getty@ stuff works anyway).
Regards,
Chris.
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