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. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)uname.3 8.1 (Berkeley) 1/4/94 29.\" $FreeBSD: src/lib/libc/gen/uname.3,v 1.6.2.4 2001/12/14 18:33:51 ru Exp $ 30.\" 31.Dd March 1, 2016 32.Dt UNAME 3 33.Os 34.Sh NAME 35.Nm uname 36.Nd get system identification 37.Sh LIBRARY 38.Lb libc 39.Sh SYNOPSIS 40.In sys/utsname.h 41.Ft int 42.Fn uname "struct utsname *name" 43.Sh DESCRIPTION 44The 45.Fn uname 46function stores nul-terminated strings of information identifying 47the current system into the structure referenced by 48.Fa name . 49.Pp 50The 51.Vt utsname 52structure is defined in the 53.In sys/utsname.h 54header file, and contains the following members: 55.Bl -tag -width nodenameXXXX -offset indent 56.It sysname 57Name of the operating system implementation. 58.It nodename 59Network name of this machine. 60.It release 61Release level of the operating system. 62.It version 63Version level of the operating system. 64.It machine 65Machine hardware platform. 66.El 67.Sh RETURN VALUES 68.Rv -std uname 69.Sh ENVIRONMENT 70.Bl -tag -width ".Ev UNAME_s" 71.It Ev UNAME_s 72If the environment variable 73.Ev UNAME_s 74is set, it will override the 75.Va sysname 76member. 77.It Ev UNAME_r 78If the environment variable 79.Ev UNAME_r 80is set, it will override the 81.Va release 82member. 83.It Ev UNAME_v 84If the environment variable 85.Ev UNAME_v 86is set, it will override the 87.Va version 88member. 89.It Ev UNAME_m 90If the environment variable 91.Ev UNAME_m 92is set, it will override the 93.Va machine 94member. 95.El 96.Sh ERRORS 97The 98.Fn uname 99function may fail and set 100.Va errno 101for any of the errors specified for the library functions 102.Xr sysctl 3 . 103.Sh SEE ALSO 104.Xr uname 1 , 105.Xr sysctl 3 106.Sh STANDARDS 107The 108.Fn uname 109function conforms to 110.St -p1003.1-88 . 111.Sh HISTORY 112The 113.Fn uname 114function first appeared in 115.Bx 4.4 . 116