1.\" Copyright (c) 1994 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)uname.3 8.1 (Berkeley) 1/4/94 33.\" $FreeBSD$ 34.\" 35.Dd December 2, 2005 36.Dt UNAME 3 37.Os 38.Sh NAME 39.Nm uname 40.Nd get system identification 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In sys/utsname.h 45.Ft int 46.Fn uname "struct utsname *name" 47.Sh DESCRIPTION 48The 49.Fn uname 50function stores 51.Dv NUL Ns -terminated 52strings of information identifying 53the current system into the structure referenced by 54.Fa name . 55.Pp 56The 57.Vt utsname 58structure is defined in the 59.In sys/utsname.h 60header file, and contains the following members: 61.Bl -tag -width nodenameXXXX -offset indent 62.It sysname 63Name of the operating system implementation. 64.It nodename 65Network name of this machine. 66.It release 67Release level of the operating system. 68.It version 69Version level of the operating system. 70.It machine 71Machine hardware platform. 72.El 73.Sh RETURN VALUES 74.Rv -std uname 75.Sh ENVIRONMENT 76.Bl -tag -width ".Ev UNAME_s" 77.It Ev UNAME_s 78If the environment variable 79.Ev UNAME_s 80is set, it will override the 81.Va sysname 82member. 83.It Ev UNAME_r 84If the environment variable 85.Ev UNAME_r 86is set, it will override the 87.Va release 88member. 89.It Ev UNAME_v 90If the environment variable 91.Ev UNAME_v 92is set, it will override the 93.Va version 94member. 95.It Ev UNAME_m 96If the environment variable 97.Ev UNAME_m 98is set, it will override the 99.Va machine 100member. 101.El 102.Sh ERRORS 103The 104.Fn uname 105function may fail and set 106.Va errno 107for any of the errors specified for the library functions 108.Xr sysctl 3 . 109.Sh SEE ALSO 110.Xr uname 1 , 111.Xr sysctl 3 112.Sh STANDARDS 113The 114.Fn uname 115function conforms to 116.St -p1003.1-88 . 117.Sh HISTORY 118The 119.Fn uname 120function first appeared in 121.Bx 4.4 . 122