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systemd-stable/extras/run_directory/README
Kay Sievers a37610d0f8 remove example rules and put the dev.d stuff into the run_directory folder
The distro rules are the best example you can get and the use of
dev.d/ is no longer recommended.

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
2005-08-09 20:11:26 +02:00

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Use these binaries only if you need backward compatibility with
older udev versions. The use of /etc/dev.d/ is no longer recommended
Use explicit udev rules with RUN keys to hook into the processing.
/etc/dev.d/ + /etc/hotplug.d/ directory multiplexing is completely
removed from udev itself and must be emulated by calling small
helper binaries provided by these helpers:
make EXTRAS=extras/run_directory/
will build udev_run_devd and udev_run_hotplugd, which can be called
from a rule if needed:
RUN+="/sbin/udev_run_hotplugd"
The recommended way to handle this is to convert all the calls from
the directories to explicit udev rules and get completely rid of the
multiplexing. (To catch a ttyUSB event, you now no longer need to
fork and exit 300 tty script instances you are not interested in, it
is just one rule that matches exactly the device.)