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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | HISTORY | SEE ALSO | NOTES | COLOPHON |
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SD_BUS_LIST_NAMES(3) sd_bus_list_names SD_BUS_LIST_NAMES(3)
sd_bus_list_names - Retrieve information about registered names on
a bus
#include <systemd/sd-bus.h>
int sd_bus_list_names(sd_bus *bus, char ***acquired,
char ***activatable);
sd_bus_list_names() retrieves information about the registered
names on a bus. If acquired is not NULL, this function calls
org.freedesktop.DBus.ListNames[1] to retrieve the list of
currently-owned names on the bus. If acquired is not NULL, the
function calls org.freedesktop.DBus.ListActivableNames[2] to
retrieve the list of all names on the bus that can be activated.
Note that ownership of the arrays returned by sd_bus_list_names()
in acquired and activatable is transferred to the caller and
hence, the caller is responsible for freeing these arrays and
their contents.
On success, sd_bus_list_names() returns a non-negative integer. On
failure, it returns a negative errno-style error code.
Errors
Returned errors may indicate the following problems:
-EINVAL
bus or both acquired and activatable were NULL.
-ENOPKG
The bus cannot be resolved.
-ECHILD
The bus was created in a different process, library or module
instance.
-ENOMEM
Memory allocation failed.
-ENOTCONN
The bus is not connected.
Functions described here are available as a shared library, which
can be compiled against and linked to with the
libsystemd pkg-config(1) file.
All functions listed here are thread-agnostic and only a single
thread may operate on a given object at any given time. Different
threads may access the same object at different times. Multiple
independent objects may be used from different threads in
parallel.
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_list_names() was added in version 221.
systemd(1), sd-bus(3)
1. org.freedesktop.DBus.ListNames
https://dbus.freedesktop.org/doc/dbus-specification.html#bus-messages-list-names
2. org.freedesktop.DBus.ListActivableNames
https://dbus.freedesktop.org/doc/dbus-specification.html#bus-messages-list-activatable-names
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 2026-08-04. (At that
time, the date of the most recent commit that was found in the
repository was 2026-08-03.) 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 262~devel SD_BUS_LIST_NAMES(3)
Pages that refer to this page: sd-bus(3), systemd.directives(7), systemd.index(7)
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HTML rendering created 2026-09-09 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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