sd_bus_get_name

Name

sd_bus_get_name_creds, sd_bus_get_owner_creds — Query bus client credentials

Synopsis

#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)`;

Description¶

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.

Errors¶

Returned errors may indicate the following problems:

-EINVAL¶: An argument is invalid.
-ENOPKG¶: The bus cannot be resolved.
-EPERM¶: The bus has already been started.
-ECHILD¶: The bus was created in a different process, library or module instance.
-ENOMEM¶: Memory allocation failed.

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_get_name_creds() and sd_bus_get_owner_creds() were added in version 221.