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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | HISTORY | SEE ALSO | NOTES | COLOPHON |
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SD_BUS_A...T_MANAGER(3) sd_bus_add_object_managerSD_BUS_A...T_MANAGER(3)
sd_bus_add_object_manager - Add a D-Bus object manager for a
D-Bus object sub-tree
#include <systemd/sd-bus.h>
int sd_bus_add_object_manager(sd_bus *bus, sd_bus_slot **slot,
const char *path);
sd_bus_add_object_manager() installs a handler for the given path
that implements the GetManagedObjects() method of the
org.freedesktop.DBus.ObjectManager interface. See
org.freedesktop.DBus.ObjectManager[1] for more information.
To implement the InterfacesAdded and InterfacesRemoved signals of
the org.freedesktop.DBus.ObjectManager interface, call
sd_bus_emit_interfaces_added(3) and
sd_bus_emit_interfaces_removed(3) whenever interfaces are added
or removed from the sub-tree, respectively.
When sd_bus_add_object_manager() succeeds, a slot is created
internally. If the output parameter slot is NULL, a "floating"
slot object is created, see sd_bus_slot_set_floating(3).
Otherwise, a pointer to the slot object is returned. In that
case, the reference to the slot object should be dropped when the
object manager is not needed anymore, see sd_bus_slot_unref(3).
On success, sd_bus_add_object_manager() returns a non-negative
integer. On failure, it returns a negative errno-style error
code.
Errors
Returned errors may indicate the following problems:
-EINVAL
One of the required parameters is NULL or path is not a valid
object path.
-ENOPKG
The bus cannot be resolved.
-ECHILD
The bus was created in a different process, library or module
instance.
-ENOMEM
Memory allocation failed.
Functions described here are available as a shared library, which
can be compiled against and linked to with the
libsystemd pkg-config(1) file.
The code described here uses getenv(3), which is declared to be
not multi-thread-safe. This means that the code calling the
functions described here must not call setenv(3) from a parallel
thread. It is recommended to only do calls to setenv() from an
early phase of the program when no other threads have been
started.
sd_bus_add_object_manager() was added in version 221.
sd-bus(3), busctl(1), sd_bus_add_object_vtable(3),
sd_bus_emit_interfaces_added(3), sd_bus_slot_unref(3)
1. org.freedesktop.DBus.ObjectManager
https://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces-objectmanager
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have
a bug report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-13.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
systemd 257~devel SD_BUS_A...T_MANAGER(3)
Pages that refer to this page: sd-bus(3), sd_bus_emit_signal(3), systemd.directives(7), systemd.index(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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