NAME

       dbus-update-activation-environment - update environment used for D-Bus session services

SYNOPSIS

       dbus-update-activation-environment [--systemd] [--verbose] --all | VAR... | VAR=VAL...

DESCRIPTION

       dbus-update-activation-environment updates the list of environment variables used by
       dbus-daemon --session when it activates session services without using systemd.

       With the --systemd option, if an instance of systemd --user is available on D-Bus, it also
       updates the list of environment variables used by systemd --user when it activates user
       services, including D-Bus session services for which dbus-daemon has been configured to
       delegate activation to systemd. This is very similar to the import-environment command
       provided by systemctl(1)).

       Variables that are special to dbus-daemon or systemd may be set, but their values will be
       overridden when a service is started. For instance, it is not useful to add
       DBUS_SESSION_BUS_ADDRESS to dbus-daemon's activation environment, although it might still
       be useful to add it to systemd's activation environment.

OPTIONS

       --all
           Set all environment variables present in the environment used by
           dbus-update-activation-environment.

       --systemd
           Set environment variables for systemd user services as well as for traditional D-Bus
           session services.

       --verbose
           Output messages to standard error explaining what dbus-update-activation-environment
           is doing.

       VAR
           If VAR is present in the environment of dbus-update-activation-environment, set it to
           the same value for D-Bus services. Its value must be UTF-8 (if not, it is skipped with
           a warning). If VAR is not present in the environment, this argument is silently
           ignored.

       VAR=VAL
           Set VAR to VAL, which must be UTF-8.

EXAMPLES

       dbus-update-activation-environment is primarily designed to be used in Linux
       distributions' X11 session startup scripts, in conjunction with the "user bus" design.

       To propagate DISPLAY and XAUTHORITY to dbus-daemon and, if present, systemd, and propagate
       DBUS_SESSION_BUS_ADDRESS to systemd:

                   dbus-update-activation-environment --systemd \
                       DBUS_SESSION_BUS_ADDRESS DISPLAY XAUTHORITY

       To propagate all environment variables except XDG_SEAT, XDG_SESSION_ID and XDG_VTNR to
       dbus-daemon (and, if present, systemd) for compatibility with legacy X11 session startup
       scripts:

                   # in a subshell so the variables remain set in the
                   # parent script
                   (
                     unset XDG_SEAT
                     unset XDG_SESSION_ID
                     unset XDG_VTNR

                     dbus-update-activation-environment --systemd --all
                   )

EXIT STATUS

       dbus-update-activation-environment exits with status 0 on success, EX_USAGE (64) on
       invalid command-line options, EX_OSERR (71) if unable to connect to the session bus, or
       EX_UNAVAILABLE (69) if unable to set the environment variables. Other nonzero exit codes
       might be added in future versions.

ENVIRONMENT

       DBUS_SESSION_BUS_ADDRESS, XDG_RUNTIME_DIR and/or DISPLAY are used to find the address of
       the session bus.

LIMITATIONS

       dbus-daemon does not provide a way to unset environment variables after they have been set
       (although systemd does), so dbus-update-activation-environment does not offer this
       functionality either.

       POSIX does not specify the encoding of non-ASCII environment variable names or values and
       allows them to contain any non-zero byte, but neither dbus-daemon nor systemd supports
       environment variables with non-UTF-8 names or values. Accordingly,
       dbus-update-activation-environment assumes that any name or value that appears to be valid
       UTF-8 is intended to be UTF-8, and ignores other names or values with a warning.

BUGS

       Please send bug reports to the D-Bus bug tracker or mailing list. See
       http://www.freedesktop.org/software/dbus/.

SEE ALSO

       dbus-daemon(1), systemd(1), the import-environment command of systemctl(1)

COPYRIGHT

       Copyright © 2015 Collabora Ltd.

       This man page is distributed under the same terms as dbus-update-activation-environment
       (MIT/X11). There is NO WARRANTY, to the extent permitted by law.