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.\" 4. 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.\" $FreeBSD$ 33.\" 34.Dd September 26, 2006 35.Dt ID 1 36.Os 37.Sh NAME 38.Nm id 39.Nd return user identity 40.Sh SYNOPSIS 41.Nm 42.Op Ar user 43.Nm 44.Fl A 45.Nm 46.Fl G Op Fl n 47.Op Ar user 48.Nm 49.Fl M 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 A 79Display the process audit user ID and other process audit properties, which 80requires privilege. 81.It Fl G 82Display the different group IDs (effective, real and supplementary) 83as white-space separated numbers, in no particular order. 84.It Fl M 85Display the MAC label of the current process. 86.It Fl P 87Display the id as a password file entry. 88.It Fl a 89Ignored for compatibility with other 90.Nm 91implementations. 92.It Fl g 93Display the effective group ID as a number. 94.It Fl n 95Display the name of the user or group ID for the 96.Fl G , 97.Fl g 98and 99.Fl u 100options instead of the number. 101If any of the ID numbers cannot be mapped into names, the number will be 102displayed as usual. 103.It Fl p 104Make the output human-readable. 105If the user name returned by 106.Xr getlogin 2 107is different from the login name referenced by the user ID, the name 108returned by 109.Xr getlogin 2 110is displayed, preceded by the keyword 111.Dq login . 112The user ID as a name is displayed, preceded by the keyword 113.Dq uid . 114If the effective user ID is different from the real user ID, the real user 115ID is displayed as a name, preceded by the keyword 116.Dq euid . 117If the effective group ID is different from the real group ID, the real group 118ID is displayed as a name, preceded by the keyword 119.Dq rgid . 120The list of groups to which the user belongs is then displayed as names, 121preceded by the keyword 122.Dq groups . 123Each display is on a separate line. 124.It Fl r 125Display the real ID for the 126.Fl g 127and 128.Fl u 129options instead of the effective ID. 130.It Fl u 131Display the effective user ID as a number. 132.El 133.Sh EXIT STATUS 134.Ex -std 135.Sh SEE ALSO 136.Xr who 1 137.Sh STANDARDS 138The 139.Nm 140function is expected to conform to 141.St -p1003.2 . 142.Sh HISTORY 143The 144historic 145.Xr groups 1 146command is equivalent to 147.Dq Nm id Fl Gn Op Ar user . 148.Pp 149The 150historic 151.Xr whoami 1 152command is equivalent to 153.Dq Nm id Fl un . 154.Pp 155The 156.Nm 157command appeared in 158.Bx 4.4 . 159