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. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)id.1 8.1 (Berkeley) 6/6/93 32.\" $FreeBSD: src/usr.bin/id/id.1,v 1.7.2.3 2001/08/16 13:16:50 ru Exp $ 33.\" $DragonFly: src/usr.bin/id/id.1,v 1.2 2003/06/17 04:29:27 dillon Exp $ 34.\" 35.Dd August 11, 2021 36.Dt ID 1 37.Os 38.Sh NAME 39.Nm id 40.Nd return user identity 41.Sh SYNOPSIS 42.Nm 43.Op Ar user 44.Nm 45.Fl G Op Fl n 46.Op Ar user 47.Nm 48.Fl P 49.Op Ar user 50.Nm 51.Fl g Op Fl nr 52.Op Ar user 53.Nm 54.Fl p 55.Op Ar user 56.Nm 57.Fl u Op Fl nr 58.Op Ar user 59.Sh DESCRIPTION 60The 61.Nm 62utility displays the user and group names and numeric IDs, of the 63calling process, to the standard output. 64If the real and effective IDs are different, both are displayed, 65otherwise only the real ID is displayed. 66.Pp 67If a 68.Ar user 69(login name or user ID) 70is specified, the user and group IDs of that user are displayed. 71In this case, the real and effective IDs are assumed to be the same. 72.Pp 73The options are as follows: 74.Bl -tag -width indent 75.It Fl G 76Display the different group IDs (effective, real and supplementary) 77as white-space separated numbers, in no particular order. 78.It Fl P 79Display the id as a password file entry. 80.It Fl a 81Ignored for compatibility with other 82.Nm 83implementations. 84.It Fl g 85Display the effective group ID as a number. 86.It Fl n 87Display the name of the user or group ID for the 88.Fl G , 89.Fl g 90and 91.Fl u 92options instead of the number. 93If any of the ID numbers cannot be mapped into names, the number will be 94displayed as usual. 95.It Fl p 96Make the output human-readable. 97If the user name returned by 98.Xr getlogin 2 99is different from the login name referenced by the user ID, the name 100returned by 101.Xr getlogin 2 102is displayed, preceded by the keyword 103.Dq login . 104The user ID as a name is displayed, preceded by the keyword 105.Dq uid . 106If the effective user ID is different from the real user ID, the real user 107ID is displayed as a name, preceded by the keyword 108.Dq euid . 109If the effective group ID is different from the real group ID, the real group 110ID is displayed as a name, preceded by the keyword 111.Dq rgid . 112The list of groups to which the user belongs is then displayed as names, 113preceded by the keyword 114.Dq groups . 115Each display is on a separate line. 116.It Fl r 117Display the real ID for the 118.Fl g 119and 120.Fl u 121options instead of the effective ID. 122.It Fl u 123Display the effective user ID as a number. 124.El 125.Sh EXIT STATUS 126.Ex -std 127.Sh SEE ALSO 128.Xr who 1 129.Sh STANDARDS 130The 131.Nm 132function is expected to conform to 133.St -p1003.2 . 134.Sh HISTORY 135The 136historic 137.Xr groups 1 138command is equivalent to 139.Dq Nm id Fl Gn Op Ar user . 140.Pp 141The 142historic 143.Xr whoami 1 144command is equivalent to 145.Dq Nm id Fl un . 146.Pp 147The 148.Nm 149command appeared in 150.Bx 4.4 . 151