pwcache.h revision 241233
12702Swollman/* $NetBSD: pwcache.h,v 1.5 2003/11/10 08:51:51 wiz Exp $ */ 22702Swollman 32702Swollman/*- 42702Swollman * Copyright (c) 1992 Keith Muller. 52702Swollman * Copyright (c) 1992, 1993 62702Swollman * The Regents of the University of California. All rights reserved. 72702Swollman * 82702Swollman * This code is derived from software contributed to Berkeley by 92702Swollman * Keith Muller of the University of California, San Diego. 102702Swollman * 112702Swollman * Redistribution and use in source and binary forms, with or without 122702Swollman * modification, are permitted provided that the following conditions 132702Swollman * are met: 142702Swollman * 1. Redistributions of source code must retain the above copyright 152702Swollman * notice, this list of conditions and the following disclaimer. 162702Swollman * 2. Redistributions in binary form must reproduce the above copyright 172702Swollman * notice, this list of conditions and the following disclaimer in the 182702Swollman * documentation and/or other materials provided with the distribution. 192702Swollman * 3. Neither the name of the University nor the names of its contributors 202702Swollman * may be used to endorse or promote products derived from this software 212702Swollman * without specific prior written permission. 222702Swollman * 232702Swollman * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 242702Swollman * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 252702Swollman * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 262702Swollman * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 272702Swollman * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 282702Swollman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 292702Swollman * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 302702Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 312702Swollman * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 322702Swollman * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 332702Swollman * SUCH DAMAGE. 342702Swollman * 352702Swollman * @(#)cache.h 8.1 (Berkeley) 5/31/93 362702Swollman */ 372702Swollman 382702Swollman/* 392702Swollman * Constants and data structures used to implement group and password file 402702Swollman * caches. Traditional passwd/group cache routines perform quite poorly with 412702Swollman * archives. The chances of hitting a valid lookup with an archive is quite a 422702Swollman * bit worse than with files already resident on the file system. These misses 432702Swollman * create a MAJOR performance cost. To address this problem, these routines 442702Swollman * cache both hits and misses. 452702Swollman * 462702Swollman * NOTE: name lengths must be as large as those stored in ANY PROTOCOL and 472702Swollman * as stored in the passwd and group files. CACHE SIZES MUST BE PRIME 482702Swollman */ 492702Swollman#define UNMLEN 32 /* >= user name found in any protocol */ 502702Swollman#define GNMLEN 32 /* >= group name found in any protocol */ 512702Swollman#define UID_SZ 317 /* size of uid to user_name cache */ 522702Swollman#define UNM_SZ 317 /* size of user_name to uid cache */ 532702Swollman#define GID_SZ 251 /* size of gid to group_name cache */ 542702Swollman#define GNM_SZ 251 /* size of group_name to gid cache */ 552702Swollman#define VALID 1 /* entry and name are valid */ 562702Swollman#define INVALID 2 /* entry valid, name NOT valid */ 572702Swollman 582702Swollman/* 592702Swollman * Node structures used in the user, group, uid, and gid caches. 602702Swollman */ 612702Swollman 622702Swollmantypedef struct uidc { 632702Swollman int valid; /* is this a valid or a miss entry */ 642702Swollman char name[UNMLEN]; /* uid name */ 652702Swollman uid_t uid; /* cached uid */ 662702Swollman} UIDC; 672702Swollman 682702Swollmantypedef struct gidc { 692702Swollman int valid; /* is this a valid or a miss entry */ 702702Swollman char name[GNMLEN]; /* gid name */ 712702Swollman gid_t gid; /* cached gid */ 722702Swollman} GIDC; 73