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 May 3, 2004 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 M 52.Nm 53.Fl P 54.Op Ar user 55.Nm 56.Fl g Op Fl nr 57.Op Ar user 58.Nm 59.Fl p 60.Op Ar user 61.Nm 62.Fl u Op Fl nr 63.Op Ar user 64.Sh DESCRIPTION 65The 66.Nm 67utility displays the user and group names and numeric IDs, of the 68calling process, to the standard output. 69If the real and effective IDs are different, both are displayed, 70otherwise only the real ID is displayed. 71.Pp 72If a 73.Ar user 74(login name or user ID) 75is specified, the user and group IDs of that user are displayed. 76In this case, the real and effective IDs are assumed to be the same. 77.Pp 78The options are as follows: 79.Bl -tag -width indent 80.It Fl G 81Display the different group IDs (effective, real and supplementary) 82as white-space separated numbers, in no particular order. 83.It Fl M 84Display the MAC label of the current prorcess. 85.It Fl P 86Display the id as a password file entry. 87.It Fl g 88Display the effective group ID as a number. 89.It Fl n 90Display the name of the user or group ID for the 91.Fl G , 92.Fl g 93and 94.Fl u 95options instead of the number. 96If any of the ID numbers cannot be mapped into names, the number will be 97displayed as usual. 98.It Fl p 99Make the output human-readable. 100If the user name returned by 101.Xr getlogin 2 102is different from the login name referenced by the user ID, the name 103returned by 104.Xr getlogin 2 105is displayed, preceded by the keyword 106.Dq login . 107The user ID as a name is displayed, preceded by the keyword 108.Dq uid . 109If the effective user ID is different from the real user ID, the real user 110ID is displayed as a name, preceded by the keyword 111.Dq euid . 112If the effective group ID is different from the real group ID, the real group 113ID is displayed as a name, preceded by the keyword 114.Dq rgid . 115The list of groups to which the user belongs is then displayed as names, 116preceded by the keyword 117.Dq groups . 118Each display is on a separate line. 119.It Fl r 120Display the real ID for the 121.Fl g 122and 123.Fl u 124options instead of the effective ID. 125.It Fl u 126Display the effective user ID as a number. 127.El 128.Sh DIAGNOSTICS 129.Ex -std 130.Sh SEE ALSO 131.Xr who 1 132.Sh STANDARDS 133The 134.Nm 135function is expected to conform to 136.St -p1003.2 . 137.Sh HISTORY 138The 139historic 140.Xr groups 1 141command is equivalent to 142.Dq Nm id Fl Gn Op Ar user . 143.Pp 144The 145historic 146.Xr whoami 1 147command is equivalent to 148.Dq Nm id Fl un . 149.Pp 150The 151.Nm 152command appeared in 153.Bx 4.4 . 154