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 June 6, 1993 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 G Op Fl n 49.Op Ar user 50.Nm 51.Fl P 52.Op Ar user 53.Nm 54.Fl g Op Fl nr 55.Op Ar user 56.Nm 57.Fl p 58.Op Ar user 59.Nm 60.Fl u Op Fl nr 61.Op Ar user 62.Sh DESCRIPTION 63The 64.Nm 65utility displays the user and group names and numeric IDs, of the 66calling process, to the standard output. 67If the real and effective IDs are different, both are displayed, 68otherwise only the real ID is displayed. 69.Pp 70If a 71.Ar user 72(login name or user ID) 73is specified, the user and group IDs of that user are displayed. 74In this case, the real and effective IDs are assumed to be the same. 75.Pp 76The options are as follows: 77.Bl -tag -width indent 78.It Fl G 79Display the different group IDs (effective, real and supplementary) 80as white-space separated numbers, in no particular order. 81.It Fl P 82Display the id as a password file entry. 83.It Fl g 84Display the effective group ID as a number. 85.It Fl n 86Display the name of the user or group ID for the 87.Fl G , 88.Fl g 89and 90.Fl u 91options instead of the number. 92If any of the ID numbers cannot be mapped into names, the number will be 93displayed as usual. 94.It Fl p 95Make the output human-readable. 96If the user name returned by 97.Xr getlogin 2 98is different from the login name referenced by the user ID, the name 99returned by 100.Xr getlogin 2 101is displayed, preceded by the keyword 102.Dq login . 103The user ID as a name is displayed, preceded by the keyword 104.Dq uid . 105If the effective user ID is different from the real user ID, the real user 106ID is displayed as a name, preceded by the keyword 107.Dq euid . 108If the effective group ID is different from the real group ID, the real group 109ID is displayed as a name, preceded by the keyword 110.Dq rgid . 111The list of groups to which the user belongs is then displayed as names, 112preceded by the keyword 113.Dq groups . 114Each display is on a separate line. 115.It Fl r 116Display the real ID for the 117.Fl g 118and 119.Fl u 120options instead of the effective ID. 121.It Fl u 122Display the effective user ID as a number. 123.El 124.Sh DIAGNOSTICS 125.Ex -std 126.Sh SEE ALSO 127.Xr who 1 128.Sh STANDARDS 129The 130.Nm 131function is expected to conform to 132.St -p1003.2 . 133.Sh HISTORY 134The 135historic 136.Xr groups 1 137command is equivalent to 138.Dq Nm id Fl Gn Op Ar user . 139.Pp 140The 141historic 142.Xr whoami 1 143command is equivalent to 144.Dq Nm id Fl un . 145.Pp 146The 147.Nm 148command appeared in 149.Bx 4.4 . 150