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Diffstat (limited to 'usr.sbin/makefs/compat/pwcache.h')
-rw-r--r-- | usr.sbin/makefs/compat/pwcache.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/usr.sbin/makefs/compat/pwcache.h b/usr.sbin/makefs/compat/pwcache.h new file mode 100644 index 0000000..1708951 --- /dev/null +++ b/usr.sbin/makefs/compat/pwcache.h @@ -0,0 +1,73 @@ +/* $NetBSD: pwcache.h,v 1.5 2003/11/10 08:51:51 wiz 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 + * $FreeBSD$ + */ + +/* + * 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; |