Index · Directives systemd 250


sd_bus_get_name_creds, sd_bus_get_owner_creds — Query bus client credentials


#include <systemd/sd-bus.h>
int sd_bus_get_name_creds(sd_bus *bus,
 const char *name,
 uint64_t mask,
 sd_bus_creds **creds);
int sd_bus_get_owner_creds(sd_bus *bus,
 uint64_t mask,
 sd_bus_creds **creds);


sd_bus_get_name_creds() queries the credentials of the bus client identified by name. The mask parameter is a combo of SD_BUS_CREDS_* flags that indicate which credential info the caller is interested in. See sd_bus_creds_new_from_pid(3) for a list of possible flags. On success, creds contains a new sd_bus_creds instance with the requested information. Ownership of this instance belongs to the caller and it should be freed once no longer needed by calling sd_bus_creds_unref(3).

sd_bus_get_owner_creds() queries the credentials of the creator of the given bus. The mask and creds parameters behave the same as in sd_bus_get_name_creds().

Return Value

On success, these functions return a non-negative integer. On failure, they return a negative errno-style error code.


Returned errors may indicate the following problems:


An argument is invalid.


The bus cannot be resolved.


The bus has already been started.


The bus was created in a different process.


Memory allocation failed.


These APIs are implemented as a shared library, which can be compiled and linked to with the libsystemd pkg-config(1) file.

See Also

systemd(1), sd-bus(3), sd_bus_creds_unref(3)