'\" t
.TH "SD_BUS_GET_NAME_MACHINE_ID" "3" "" "systemd 255" "sd_bus_get_name_machine_id"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
sd_bus_get_name_machine_id \- Retrieve a bus client\*(Aqs machine identity
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <systemd/sd\-bus\&.h>
.fi
.ft
.HP \w'int\ sd_bus_get_name_machine_id('u
.BI "int sd_bus_get_name_machine_id(sd_bus\ *" "bus" ", const\ char\ *" "name" ", sd_id128_t\ *" "machine" ");"
.SH "DESCRIPTION"
.PP
\fBsd_bus_get_name_machine_id()\fR
retrieves the D\-Bus machine identity of the machine that the bus client identified by
\fIname\fR
is running on\&. Internally, it calls the
\fBGetMachineId\fR
method of the
\fBorg\&.freedesktop\&.DBus\&.Peer\fR
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
\fImachine\fR\&.
.SH "RETURN VALUE"
.PP
On success, this function returns a non\-negative integer\&. On failure, it returns a negative errno\-style error code\&.
.SS "Errors"
.PP
Returned errors may indicate the following problems:
.PP
\fB\-EINVAL\fR
.RS 4
An argument is invalid\&.
.sp
Added in version 246\&.
.RE
.PP
\fB\-ENOPKG\fR
.RS 4
The bus cannot be resolved\&.
.sp
Added in version 246\&.
.RE
.PP
\fB\-ECHILD\fR
.RS 4
The bus was created in a different process, library or module instance\&.
.sp
Added in version 246\&.
.RE
.PP
\fB\-ENOMEM\fR
.RS 4
Memory allocation failed\&.
.sp
Added in version 246\&.
.RE
.SH "NOTES"
.PP
Functions described here are available as a shared library, which can be compiled against and linked to with the
\fBlibsystemd\fR\ \&\fBpkg-config\fR(1)
file\&.
.PP
The code described here uses
\fBgetenv\fR(3), which is declared to be not multi\-thread\-safe\&. This means that the code calling the functions described here must not call
\fBsetenv\fR(3)
from a parallel thread\&. It is recommended to only do calls to
\fBsetenv()\fR
from an early phase of the program when no other threads have been started\&.
.SH "HISTORY"
.PP
\fBsd_bus_get_name_machine_id()\fR
was added in version 246\&.
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1),
\fBsd-bus\fR(3)