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pwcache.3
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pwcache.c
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pwcache.h
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Editing: pwcache.h
/* $NetBSD: pwcache.h,v 1.5 2003/11/10 08:51:51 wiz Exp $ */ /* $FreeBSD$ */ /*- * Copyright (c) 1992 Keith Muller. * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Keith Muller of the University of California, San Diego. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)cache.h 8.1 (Berkeley) 5/31/93 */ /* * Constants and data structures used to implement group and password file * caches. Traditional passwd/group cache routines perform quite poorly with * archives. The chances of hitting a valid lookup with an archive is quite a * bit worse than with files already resident on the file system. These misses * create a MAJOR performance cost. To address this problem, these routines * cache both hits and misses. * * NOTE: name lengths must be as large as those stored in ANY PROTOCOL and * as stored in the passwd and group files. CACHE SIZES MUST BE PRIME */ #define UNMLEN 32 /* >= user name found in any protocol */ #define GNMLEN 32 /* >= group name found in any protocol */ #define UID_SZ 317 /* size of uid to user_name cache */ #define UNM_SZ 317 /* size of user_name to uid cache */ #define GID_SZ 251 /* size of gid to group_name cache */ #define GNM_SZ 251 /* size of group_name to gid cache */ #define VALID 1 /* entry and name are valid */ #define INVALID 2 /* entry valid, name NOT valid */ /* * Node structures used in the user, group, uid, and gid caches. */ typedef struct uidc { int valid; /* is this a valid or a miss entry */ char name[UNMLEN]; /* uid name */ uid_t uid; /* cached uid */ } UIDC; typedef struct gidc { int valid; /* is this a valid or a miss entry */ char name[GNMLEN]; /* gid name */ gid_t gid; /* cached gid */ } GIDC;
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