sd_bus_list_names - Man Page

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);

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.
-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.

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.