установить или запросить свойства объекта шины (set or query properties of a bus object)
Дубль
(статьи:
sd_bus_get_allow_interactive_authorization - установить или запросить свойства объекта шины )
Имя (Name)
sd_bus_set_description, sd_bus_get_description,
sd_bus_set_anonymous, sd_bus_is_anonymous, sd_bus_set_trusted,
sd_bus_is_trusted, sd_bus_set_allow_interactive_authorization,
sd_bus_get_allow_interactive_authorization, sd_bus_get_scope,
sd_bus_get_tid, sd_bus_get_unique_name - Set or query properties
of a bus object
Синопсис (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_is_anonymous(sd_bus *bus);
int sd_bus_set_trusted(sd_bus *bus, int b);
int sd_bus_is_trusted(sd_bus *bus);
int sd_bus_set_allow_interactive_authorization(sd_bus *bus,
int b);
int sd_bus_get_allow_interactive_authorization(sd_bus *bus);
int sd_bus_get_scope(sd_bus *bus, const char **scope);
int sd_bus_get_tid(sd_bus *bus, pid_t *tid);
int sd_bus_get_unique_name(sd_bus *bus, const char **unique);
Описание (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 is 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 -ENXIO
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 is started. See the
Authentication Mechanisms
sd_bus_is_anonymous() returns true if the bus connection allows
anonymous authentication (in the sense described in previous
paragraph).
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 is started.
sd_bus_is_trusted() returns true if the bus connection is trusted
(in the sense described in previous paragraph).
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-Buspolkit
sd_bus_get_allow_interactive_authorization() returns true if
interactive authorization is allowed and false if not.
sd_bus_get_scope() stores the scope of the given bus object in
scope. The scope of the system bus is "system". The scope of a
user session bus is "user". If the given bus object is not the
system or a user session bus, sd_bus_get_scope() returns an
error.
sd_bus_get_tid() stores the kernel thread id of the thread
associated with the given bus object in tid. If bus is a default
bus object obtained by calling one of the functions of the
sd_bus_default(3) family of functions, it stores the thread id of
the thread the bus object was created in. Otherwise, if the bus
object is attached to an event loop, it stores the thread id of
the thread the event loop object was created in. If bus is not a
default bus object and is not attached to an event loop,
sd_bus_get_tid() returns an error.
sd_bus_get_unique_name() stores the unique name of the bus object
on the bus in unique. See The D-Bus specification
Возвращаемое значение (Return value)
On success, these functions return a non-negative 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.
-ENODATA
The bus object passed to sd_bus_get_scope() was not a system
or user session bus.
-ENXIO
The bus object passed to sd_bus_get_tid() was not a default
bus object and is not attached to an event loop.
The bus object passed to sd_bus_get_description() did not
have a description.
Примечание (Note)
These APIs are implemented as a shared library, which can be
compiled and linked to with the libsystemd pkg-config(1) file.
Смотри также (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)
Примечание (Note)
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
4. The D-Bus specification
https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-bus
