/etc/dbus-1/system.d/wpa_supplicant.conf is in wpasupplicant 2.1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | <!DOCTYPE busconfig PUBLIC
"-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
<policy user="root">
<allow own="fi.epitest.hostap.WPASupplicant"/>
<allow send_destination="fi.epitest.hostap.WPASupplicant"/>
<allow send_interface="fi.epitest.hostap.WPASupplicant"/>
<allow own="fi.w1.wpa_supplicant1"/>
<allow send_destination="fi.w1.wpa_supplicant1"/>
<allow send_interface="fi.w1.wpa_supplicant1"/>
<allow receive_sender="fi.w1.wpa_supplicant1" receive_type="signal"/>
</policy>
<policy group="netdev">
<allow send_destination="fi.epitest.hostap.WPASupplicant"/>
<allow send_interface="fi.epitest.hostap.WPASupplicant"/>
<allow send_destination="fi.w1.wpa_supplicant1"/>
<allow send_interface="fi.w1.wpa_supplicant1"/>
<allow receive_sender="fi.w1.wpa_supplicant1" receive_type="signal"/>
</policy>
<policy context="default">
<deny own="fi.epitest.hostap.WPASupplicant"/>
<deny send_destination="fi.epitest.hostap.WPASupplicant"/>
<deny send_interface="fi.epitest.hostap.WPASupplicant"/>
<deny own="fi.w1.wpa_supplicant1"/>
<deny send_destination="fi.w1.wpa_supplicant1"/>
<deny send_interface="fi.w1.wpa_supplicant1"/>
<deny receive_sender="fi.w1.wpa_supplicant1" receive_type="signal"/>
</policy>
</busconfig>
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