1.\" Copyright (c) 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the Institute of Electrical and Electronics Engineers, Inc. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by the University of 18.\" California, Berkeley and its contributors. 19.\" 4. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)id.1 8.1 (Berkeley) 6/6/93 36.\" $FreeBSD$ 37.\" 38.Dd September 26, 2006 39.Dt ID 1 40.Os 41.Sh NAME 42.Nm id 43.Nd return user identity 44.Sh SYNOPSIS 45.Nm 46.Op Ar user 47.Nm 48.Fl A 49.Nm 50.Fl G Op Fl n 51.Op Ar user 52.Nm 53.Fl M 54.Nm 55.Fl P 56.Op Ar user 57.Nm 58.Fl g Op Fl nr 59.Op Ar user 60.Nm 61.Fl p 62.Op Ar user 63.Nm 64.Fl u Op Fl nr 65.Op Ar user 66.Sh DESCRIPTION 67The 68.Nm 69utility displays the user and group names and numeric IDs, of the 70calling process, to the standard output. 71If the real and effective IDs are different, both are displayed, 72otherwise only the real ID is displayed. 73.Pp 74If a 75.Ar user 76(login name or user ID) 77is specified, the user and group IDs of that user are displayed. 78In this case, the real and effective IDs are assumed to be the same. 79.Pp 80The options are as follows: 81.Bl -tag -width indent 82.It Fl A 83Display the process audit user ID and other process audit properties, which 84requires privilege. 85.It Fl G 86Display the different group IDs (effective, real and supplementary) 87as white-space separated numbers, in no particular order. 88.It Fl M 89Display the MAC label of the current process. 90.It Fl P 91Display the id as a password file entry. 92.It Fl a 93Ignored for compatibility with other 94.Nm 95implementations. 96.It Fl g 97Display the effective group ID as a number. 98.It Fl n 99Display the name of the user or group ID for the 100.Fl G , 101.Fl g 102and 103.Fl u 104options instead of the number. 105If any of the ID numbers cannot be mapped into names, the number will be 106displayed as usual. 107.It Fl p 108Make the output human-readable. 109If the user name returned by 110.Xr getlogin 2 111is different from the login name referenced by the user ID, the name 112returned by 113.Xr getlogin 2 114is displayed, preceded by the keyword 115.Dq login . 116The user ID as a name is displayed, preceded by the keyword 117.Dq uid . 118If the effective user ID is different from the real user ID, the real user 119ID is displayed as a name, preceded by the keyword 120.Dq euid . 121If the effective group ID is different from the real group ID, the real group 122ID is displayed as a name, preceded by the keyword 123.Dq rgid . 124The list of groups to which the user belongs is then displayed as names, 125preceded by the keyword 126.Dq groups . 127Each display is on a separate line. 128.It Fl r 129Display the real ID for the 130.Fl g 131and 132.Fl u 133options instead of the effective ID. 134.It Fl u 135Display the effective user ID as a number. 136.El 137.Sh EXIT STATUS 138.Ex -std 139.Sh SEE ALSO 140.Xr who 1 141.Sh STANDARDS 142The 143.Nm 144function is expected to conform to 145.St -p1003.2 . 146.Sh HISTORY 147The 148historic 149.Xr groups 1 150command is equivalent to 151.Dq Nm id Fl Gn Op Ar user . 152.Pp 153The 154historic 155.Xr whoami 1 156command is equivalent to 157.Dq Nm id Fl un . 158.Pp 159The 160.Nm 161command appeared in 162.Bx 4.4 . 163