id/id.1

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  35 .\"     @(#)id.1        8.1 (Berkeley) 6/6/93
  36 .\" $FreeBSD: src/usr.bin/id/id.1,v 1.11 2001/08/15 09:09:41 ru Exp $
  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
  63 The
  64 .Nm
  65 utility displays the user and group names and numeric IDs, of the
  66 calling process, to the standard output.
  67 If the real and effective IDs are different, both are displayed,
  68 otherwise only the real ID is displayed.
  69 .Pp
  70 If a
  71 .Ar user
  72 (login name or user ID)
  73 is specified, the user and group IDs of that user are displayed.
  74 In this case, the real and effective IDs are assumed to be the same.
  75 .Pp
  76 The options are as follows:
  77 .Bl -tag -width indent
  78 .It Fl G
  79 Display the different group IDs (effective, real and supplementary)
  80 as white-space separated numbers, in no particular order.
  81 .It Fl P
  82 Display the id as a password file entry.
  83 .It Fl g
  84 Display the effective group ID as a number.
  85 .It Fl n
  86 Display the name of the user or group ID for the
  87 .Fl G ,
  88 .Fl g
  89 and
  90 .Fl u
  91 options instead of the number.
  92 If any of the ID numbers cannot be mapped into names, the number will be
  93 displayed as usual.
  94 .It Fl p
  95 Make the output human-readable.
  96 If the user name returned by
  97 .Xr getlogin 2
  98 is different from the login name referenced by the user ID, the name
  99 returned by
 100 .Xr getlogin 2
 101 is displayed, preceded by the keyword
 102 .Dq login .
 103 The user ID as a name is displayed, preceded by the keyword
 104 .Dq uid .
 105 If the effective user ID is different from the real user ID, the real user
 106 ID is displayed as a name, preceded by the keyword
 107 .Dq euid .
 108 If the effective group ID is different from the real group ID, the real group
 109 ID is displayed as a name, preceded by the keyword
 110 .Dq rgid .
 111 The list of groups to which the user belongs is then displayed as names,
 112 preceded by the keyword
 113 .Dq groups .
 114 Each display is on a separate line.
 115 .It Fl r
 116 Display the real ID for the
 117 .Fl g
 118 and
 119 .Fl u
 120 options instead of the effective ID.
 121 .It Fl u
 122 Display 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
 129 The
 130 .Nm
 131 function is expected to conform to
 132 .St -p1003.2 .
 133 .Sh HISTORY
 134 The
 135 historic
 136 .Xr groups 1
 137 command is equivalent to
 138 .Dq Nm id Fl Gn Op Ar user .
 139 .Pp
 140 The
 141 historic
 142 .Xr whoami 1
 143 command is equivalent to
 144 .Dq Nm id Fl un .
 145 .Pp
 146 The
 147 .Nm
 148 command appeared in
 149 .Bx 4.4 .