1.\" $NetBSD: uname.3,v 1.13 2014/06/14 14:32:43 apb Exp $ 2.\" 3.\" Copyright (c) 1994 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)uname.3 8.1 (Berkeley) 1/4/94 31.\" 32.Dd June 14, 2014 33.Dt UNAME 3 34.Os 35.Sh NAME 36.Nm uname 37.Nd get system identification 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In sys/utsname.h 42.Ft int 43.Fn uname "struct utsname *name" 44.Sh DESCRIPTION 45The 46.Fn uname 47function stores nul-terminated strings of information identifying 48the current system into the structure referenced by 49.Fa name . 50.Pp 51The 52.Em utsname 53structure is defined in the 54.In sys/utsname.h 55header file, and contains the following members: 56.Bl -tag -width nodenameXXXX -offset indent 57.It Va sysname 58Name of the operating system implementation. 59Equivalent to the 60.Xr sysctl 7 61.Va kern.ostype 62variable. 63.It Va nodename 64Network name of this machine. 65Equivalent to the 66.Xr sysctl 7 67.Va kern.hostname 68variable. 69.It Va release 70Release level of the operating system. 71Equivalent to the 72.Xr sysctl 7 73.Va kern.osrelease 74variable. 75.It Va version 76Version level of the operating system. 77Equivalent to the 78.Xr sysctl 7 79.Va kern.version 80variable, except that very long values are truncated, 81and newlines are converted to spaces. 82.It Va machine 83Machine hardware platform. 84Equivalent to the 85.Xr sysctl 7 86.Va hw.machine 87variable. 88.El 89.Sh RETURN VALUES 90If 91.Nm uname 92is successful, 0 is returned, otherwise, \-1 is returned and 93.Va errno 94is set appropriately. 95.Sh ERRORS 96The 97.Fn uname 98function may fail and set 99.Va errno 100for any of the errors specified for the library functions 101.Xr sysctl 3 . 102.Sh SEE ALSO 103.Xr uname 1 , 104.Xr sysctl 3 105.Sh STANDARDS 106The 107.Fn uname 108function conforms to 109.St -p1003.1-90 . 110.Sh HISTORY 111The 112.Nm uname 113function first appeared in 114.Bx 4.4 . 115