dbus-update-activation-environment

DBUS-UPDATE-ACTIVA(1)            User Commands           DBUS-UPDATE-ACTIVA(1)

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 (C) 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.

D-Bus 1.12.16                                            DBUS-UPDATE-ACTIVA(1)