.\"	$NetBSD: uname.3,v 1.13 2014/06/14 14:32:43 apb Exp $
.\"
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.\"	@(#)uname.3	8.1 (Berkeley) 1/4/94
.\"
.Dd June 14, 2014
.Dt UNAME 3
.Os
.Sh NAME
.Nm uname
.Nd get system identification
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/utsname.h
.Ft int
.Fn uname "struct utsname *name"
.Sh DESCRIPTION
The
.Fn uname
function stores nul-terminated strings of information identifying
the current system into the structure referenced by
.Fa name .
.Pp
The
.Em utsname
structure is defined in the
.In sys/utsname.h
header file, and contains the following members:
.Bl -tag -width nodenameXXXX -offset indent
.It Va sysname
Name of the operating system implementation.
Equivalent to the
.Xr sysctl 7
.Va kern.ostype
variable.
.It Va nodename
Network name of this machine.
Equivalent to the
.Xr sysctl 7
.Va kern.hostname
variable.
.It Va release
Release level of the operating system.
Equivalent to the
.Xr sysctl 7
.Va kern.osrelease
variable.
.It Va version
Version level of the operating system.
Equivalent to the
.Xr sysctl 7
.Va kern.version
variable, except that very long values are truncated,
and newlines are converted to spaces.
.It Va machine
Machine hardware platform.
Equivalent to the
.Xr sysctl 7
.Va hw.machine
variable.
.El
.Sh RETURN VALUES
If
.Nm uname
is successful, 0 is returned, otherwise, \-1 is returned and
.Va errno
is set appropriately.
.Sh ERRORS
The
.Fn uname
function may fail and set
.Va errno
for any of the errors specified for the library functions
.Xr sysctl 3 .
.Sh SEE ALSO
.Xr uname 1 ,
.Xr sysctl 3
.Sh STANDARDS
The
.Fn uname
function conforms to
.St -p1003.1-90 .
.Sh HISTORY
The
.Nm uname
function first appeared in
.Bx 4.4 .