improve exit status handling for program map code

[unix-history] / usr / src / bin / pax / cache.h

/*-
 * 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.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)cache.h	8.1 (Berkeley) %G%
 */

/*
 * 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;