files_common.h revision 1219:f89f56c2d9ac 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23/*
24 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
25 * Use is subject to license terms.
26 */
27
28/*
29 * Common code and structures used by name-service-switch "files" backends.
30 */
31
32#ifndef _FILES_COMMON_H
33#define	_FILES_COMMON_H
34
35#pragma ident	"%Z%%M%	%I%	%E% SMI"
36
37#include "c_synonyms.h"
38#include <nss_common.h>
39#include <nss_dbdefs.h>
40#include <stdio.h>
41
42#include "../../../libnsl/include/nsl_stdio_prv.h"
43
44#ifdef	__cplusplus
45extern "C" {
46#endif
47
48typedef struct files_backend *files_backend_ptr_t;
49typedef nss_status_t	(*files_backend_op_t)(files_backend_ptr_t, void *);
50
51typedef u_int (*files_hash_func)(nss_XbyY_args_t *, int);
52
53typedef struct files_hashent {
54	struct files_hashent	*h_first;
55	struct files_hashent	*h_next;
56	u_int			h_hash;
57} files_hashent_t;
58
59typedef struct {
60	char			*l_start;
61	int			l_len;
62} files_linetab_t;
63
64typedef struct {
65	mutex_t		fh_lock;
66	int		fh_resultsize;
67	int		fh_bufsize;
68	int		fh_nhtab;
69	files_hash_func	*fh_hash_func;
70	int		fh_refcnt;
71	int		fh_size;
72	timestruc_t	fh_mtime;
73	char		*fh_file_start;
74	char		*fh_file_end;
75	files_linetab_t	*fh_line;
76	files_hashent_t	*fh_table;
77} files_hash_t;
78
79struct files_backend {
80	files_backend_op_t	*ops;
81	int			n_ops;
82	const char		*filename;
83	__NSL_FILE		*f;
84	int			minbuf;
85	char			*buf;
86	files_hash_t		*hashinfo;
87};
88
89/*
90 * Iterator function for _nss_files_do_all(), which probably calls yp_all().
91 *   NSS_NOTFOUND means "keep enumerating", NSS_SUCCESS means"return now",
92 *   other values don't make much sense.  In other words we're abusing
93 *   (overloading) the meaning of nss_status_t, but hey...
94 * _nss_files_XY_all() is a wrapper around _nss_files_do_all() that does the
95 *   generic work for nss_XbyY_args_t backends (calls cstr2ent etc).
96 */
97typedef nss_status_t	(*files_do_all_func_t)(const char *, int, void *args);
98typedef int		(*files_XY_check_func)(nss_XbyY_args_t *);
99
100#if defined(__STDC__)
101extern nss_backend_t	*_nss_files_constr(files_backend_op_t	*ops,
102					int			n_ops,
103					const char		*filename,
104					int			min_bufsize,
105					files_hash_t		*fhp);
106extern nss_status_t	_nss_files_destr (files_backend_ptr_t, void *dummy);
107extern nss_status_t	_nss_files_setent(files_backend_ptr_t, void *dummy);
108extern nss_status_t	_nss_files_endent(files_backend_ptr_t, void *dummy);
109extern nss_status_t	_nss_files_getent_rigid(files_backend_ptr_t, void *);
110extern nss_status_t	_nss_files_getent_netdb(files_backend_ptr_t, void *);
111extern nss_status_t 	_nss_files_do_all(files_backend_ptr_t,
112					void			*func_priv,
113					const char		*filter,
114					files_do_all_func_t	func);
115extern nss_status_t 	_nss_files_XY_all(files_backend_ptr_t	be,
116					nss_XbyY_args_t		*args,
117					int 			netdb,
118					const char		*filter,
119					files_XY_check_func	check);
120extern nss_status_t 	_nss_files_XY_hash(files_backend_ptr_t	be,
121					nss_XbyY_args_t		*args,
122					int 			netdb,
123					files_hash_t		*fhp,
124					int			hashop,
125					files_XY_check_func	check);
126int _nss_files_read_line(__NSL_FILE *f, char *buffer, int	buflen);
127#else
128extern nss_backend_t	*_nss_files_constr();
129extern nss_status_t	_nss_files_destr ();
130extern nss_status_t	_nss_files_setent();
131extern nss_status_t	_nss_files_endent();
132extern nss_status_t	_nss_files_getent_rigid();
133extern nss_status_t	_nss_files_getent_netdb();
134extern nss_status_t	_nss_files_do_all();
135extern nss_status_t	_nss_files_XY_all();
136extern nss_status_t	_nss_files_XY_hash();
137#endif
138
139#ifdef	__cplusplus
140}
141#endif
142
143#endif /* _FILES_COMMON_H */
144