dbus-update-activation-environment - Online in the Cloud

PROGRAM:

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.

Use dbus-update-activation-environment online using onworks.net services