1.\" Copyright (c) 1989, 1991 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)pwcache.3 5.4 (Berkeley) 4/19/91 33.\" $Id: pwcache.3,v 1.3 1994/01/28 05:43:35 cgd Exp $ 34.\" 35.Dd April 19, 1991 36.Dt PWCACHE 3 37.Os 38.Sh NAME 39.Nm pwcache 40.Nd cache password and group entries 41.Sh SYNOPSIS 42.Fn user_from_uid "uid_t uid" "int nouser" 43.Fn group_from_gid "gid_t gid" "int nogroup" 44.Sh DESCRIPTION 45The 46.Fn user_from_uid 47function returns the user name associated with the argument 48.Fa uid . 49The user name is cached so that multiple calls with the same 50.Fa uid 51do not require additional calls to 52.Xr getpwuid 3 . 53If there is no user associated with the 54.Fa uid , 55a pointer is returned 56to an 57.Tn ASCII 58representation of the 59.Fa uid , 60unless the argument 61.Fa nouser 62is non-zero, in which case a 63.Dv NULL 64pointer is returned. 65.Pp 66The 67.Fn group_from_gid 68function returns the group name associated with the argument 69.Fa gid . 70The group name is cached so that multiple calls with the same 71.Fa gid 72do not require additional calls to 73.Xr getgrgid 3 . 74If there is no group associated with the 75.Fa gid , 76a pointer is returned 77to an 78.Tn ASCII 79representation of the 80.Fa gid , 81unless the argument 82.Fa nogroup 83is non-zero, in which case a 84.Dv NULL 85pointer is returned. 86.Sh SEE ALSO 87.Xr getgrgid 3 , 88.Xr getpwuid 3 89.Sh HISTORY 90The 91.Fn user_from_id 92and 93.Fn group_from_id 94functions are 95.Ud . 96