Man page - sd_bus_get_name_machine_id(3)

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Manual

SD_BUS_GET_NAME_MACHINE_ID

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
Errors
NOTES
HISTORY
SEE ALSO

NAME

sd_bus_get_name_machine_id - Retrieve a bus client's machine identity

SYNOPSIS

#include <systemd/sd-bus.h>

int sd_bus_get_name_machine_id(sd_bus * bus , const char * name , sd_id128_t * machine );

DESCRIPTION

sd_bus_get_name_machine_id() retrieves the D-Bus machine identity of the machine that the bus client identified by name is running on. Internally, it calls the GetMachineId method of the org.freedesktop.DBus.Peer interface. The D-Bus machine identity is a 128-bit UUID. On Linux systems running systemd, this corresponds to the contents of /etc/machine-id. On success, the machine identity is stored in machine .

RETURN VALUE

On success, this function returns a non-negative integer. On failure, it returns 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.

-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_machine_id() was added in version 221.

SEE ALSO

systemd (1), sd-bus (3)