NAME

       sd_bus_set_description, sd_bus_get_description, sd_bus_set_anonymous, sd_bus_set_trusted,
       sd_bus_set_allow_interactive_authorization, sd_bus_get_allow_interactive_authorization -
       Set or query properties of a bus object

SYNOPSIS

       #include <systemd/sd-bus.h>

       int sd_bus_set_description(sd_bus *bus, const char *description);

       int sd_bus_get_description(sd_bus *bus, const char **description);

       int sd_bus_set_anonymous(sd_bus *bus, int b);

       int sd_bus_set_trusted(sd_bus *bus, int b);

       int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b);

       int sd_bus_get_allow_interactive_authorization(sd_bus *bus);

DESCRIPTION

       sd_bus_set_description() sets the description string that is used in logging to the
       specified string. The string is copied internally and freed when the bus object is
       deallocated. The description argument may be NULL, in which case the description is unset.
       This function must be called before the bus has been started.

       sd_bus_get_description() returns a description string in description. This string may have
       been previously set with sd_bus_set_description() or sd_bus_open_with_description(3) or
       similar. If not set this way, a default string like "system" or "user" will be returned
       for the system or user buses, and NULL otherwise.

       sd_bus_set_anonymous() enables or disables "anonymous authentication", i.e. lack of
       authentication, of the bus peer. This function must be called before the bus has been
       started. See the Authentication Mechanisms[1] section of the D-Bus specification for
       details.

       sd_bus_set_trusted() sets the "trusted" state on the bus object. If true, all connections
       on the bus are trusted and access to all privileged and unprivileged methods is granted.
       This function must be called before the bus has been started.

       sd_bus_set_allow_interactive_authorization() enables or disables interactive authorization
       for method calls. If true, messages are marked with the ALLOW_INTERACTIVE_AUTHORIZATION
       flag specified by the D-Bus[2] specification, informing the receiving side that the caller
       is prepared to wait for interactive authorization, which might take a considerable time to
       complete. If this flag is set, the user may be queried for passwords or confirmation via
       polkit[3] or a similar framework.

       sd_bus_get_allow_interactive_authorization() returns true if interactive authorization is
       allowed and false if not.

RETURN VALUE

       On success, these functions return 0 or a positive integer. On failure, they return a
       negative errno-style error code.

   Errors
       Returned errors may indicate the following problems:

       -EINVAL
           An argument is invalid.

       -ENOPKG
           The bus cannot be resolved.

       -EPERM
           The bus has already been started.

       -ECHILD
           The bus was created in a different process.

       -ENOMEM
           Memory allocation failed.

NOTES

       These APIs are implemented as a shared library, which can be compiled and linked to with
       the libsystemd pkg-config(1) file.

SEE ALSO

       systemd(1), sd-bus(3), sd_bus_default_user(3), sd_bus_default_system(3),
       sd_bus_open_user(3), sd_bus_open_system(3)

NOTES

        1. Authentication Mechanisms
           view-source:https://dbus.freedesktop.org/doc/dbus-specification.html#auth-mechanisms

        2. D-Bus
           view-source:https://dbus.freedesktop.org/doc/dbus-specification.html

        3. polkit
           http://www.freedesktop.org/wiki/Software/polkit