/etc/X11/Xsession.d/95dbus_update-activation-env is in dbus-x11 1.10.6-1ubuntu3.
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 | # vim:set ft=sh sw=2 sts=2 et:
if [ -n "$DBUS_SESSION_BUS_ADDRESS" ] && \
[ -x "/usr/bin/dbus-update-activation-environment" ]; then
# subshell so we can unset environment variables
(
# unset login-session-specifics
unset XDG_SEAT
unset XDG_SESSION_ID
unset XDG_VTNR
# tell dbus-daemon --session (and systemd --user, if running)
# to put the Xsession's environment in activated services'
# environments
dbus-update-activation-environment --verbose --systemd --all
)
fi
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