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/* $OpenBSD: cache.h,v 1.6 2014/07/14 05:59:26 guenther Exp $ */
/* $NetBSD: cache.h,v 1.3 1995/03/21 09:07:12 cgd Exp $ */
/*-
* 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 adress 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 user_name/uid cache */
#define UNM_SZ 317 /* size of user_name/uid cache */
#define GID_SZ 251 /* size of gid cache */
#define GNM_SZ 317 /* size of group name 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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