Re: systemd-udevd -any way to list triggered rules with their files etc ?

[Lennart Poettering <lennart@xxxxxxxxxxxxxx>]

On Mo, 03.10.22 02:17, Branko (brankob@xxxxxxxxxxxxxx) wrote:

> cat /etc/udev/rules.d/99-zz-network.rules:
> ACTION=="add", DRIVERS=="?*", ATTR{address}=="11:22:33:44:55:66",
> NAME="wlan17", OWNER="chosen_user", GROUP="chosen_group",
> MODE="0666"

ACTION="add" is almost always the wrong expression. Because devices
will be triggered via "change" and similar, and thus your props will
be dropped again once that happens.

You want ACTION!="remove" instead, i.e. match all "positive" events,
i.e. where the device is still there afterwards (which is
systematically different from "remove" where it isn't).

> I know it does get triggered, since after replugging the WIFi stick I
> do get "wlan17" interface.But resulting created device in
> /dev/bus/usb/00x/00y gets created with MODE=0640 and root:usb

As mentioned elsewhere, what's a usbfs file, not a netif. network
interfaces have no ownership concept.

> I'm at a loss here. How is one supposed to get more detailed info on
> what's and WHY is going on with systemd-udevd tree processing ?

if you boot up with "debug" you should get tons of debug output to
wade through.

Lennart

--
Lennart Poettering, Berlin