Man page - dbus-update-activation-environment(1)

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DBUS-UPDATE-ACTIVA

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
EXIT STATUS
ENVIRONMENT
LIMITATIONS
BUGS
AUTHOR
SEE ALSO
COPYRIGHT

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 https://www.freedesktop.org/wiki/Software/dbus/ .

AUTHOR

See https://dbus.freedesktop.org/doc/AUTHORS

COPYRIGHT

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.