SD_BUS_LIST_NAMES(3)           sd_bus_list_names          SD_BUS_LIST_NAMES(3)

NAME
       sd_bus_list_names - Retrieve information about registered names on a
       bus

SYNOPSIS
       #include <systemd/sd-bus.h>

       int sd_bus_list_names(sd_bus *bus, char ***acquired,
                             char ***activatable);

DESCRIPTION
       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.

RETURN VALUE
       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.

           Added in version 246.

       -ENOPKG
           The bus cannot be resolved.

           Added in version 246.

       -ECHILD
           The bus was created in a different process, library or module
           instance.

           Added in version 246.

       -ENOMEM
           Memory allocation failed.

           Added in version 246.

       -ENOTCONN
           The bus is not connected.

           Added in version 246.

NOTES
       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.

HISTORY
       sd_bus_list_names() was added in version 246.

SEE ALSO
       systemd(1), sd-bus(3)

NOTES
        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

systemd 255                                               SD_BUS_LIST_NAMES(3)