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Description of problem:
usbguard-daemon.conf(5) states:
RuleFile=path
The USBGuard daemon will use this file to load the policy rule set from it and to write new rules received via the IPC interface. Default: %sysconfdir%/usbguard/rules.conf
But when starting usbguard.service with minimal configuration without RuleFile:
Aug 29 10:11:14 localhost.localdomain usbguard-daemon[3996]: [1661757074.047] (W) RuleFile not set; Modification of the permanent policy won't be possible.
Aug 29 10:11:14 localhost.localdomain usbguard-daemon[3996]: RuleFile not set; Modification of the permanent policy won't be possible.
Based on the man page and the message it is unclear whether the default is used or not? I think it would be better to allow for maximum flexibility and leave RuleFile undefined (or use /dev/null) instead of setting it to some value unconditionally, so perhaps only the man page needs tweaking in this regard.
Also, the message is needlessly logged twice in system log and the first line has unhelpful timestamp on it.
Version-Release number of selected component (if applicable):
usbguard-1.0.0-10.el9.x86_64
Regarding message duplication inside logs, you can turn off logging to console by adding "-K" option in the service file:
ExecStart=/usr/sbin/usbguard-daemon -f -s -K -c /etc/usbguard/usbguard-daemon.conf
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (usbguard bug fix and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2023:2351