1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/* $NetBSD: nsswitch.h,v 1.6 1999/01/26 01:04:07 lukem Exp $ */
/* $FreeBSD$ */
/*-
* Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#ifndef _NSSWITCH_H
#define _NSSWITCH_H 1
#include <sys/types.h>
#include <stdarg.h>
#define NSS_MODULE_INTERFACE_VERSION 1
#ifndef _PATH_NS_CONF
#define _PATH_NS_CONF "/etc/nsswitch.conf"
#endif
/* NSS source actions */
#define NS_ACTION_CONTINUE 0 /* try the next source */
#define NS_ACTION_RETURN 1 /* look no further */
#define NS_SUCCESS (1<<0) /* entry was found */
#define NS_UNAVAIL (1<<1) /* source not responding, or corrupt */
#define NS_NOTFOUND (1<<2) /* source responded 'no such entry' */
#define NS_TRYAGAIN (1<<3) /* source busy, may respond to retry */
#define NS_RETURN (1<<4) /* stop search, e.g. for ERANGE */
#define NS_TERMINATE (NS_SUCCESS|NS_RETURN) /* flags that end search */
#define NS_STATUSMASK 0x000000ff /* bitmask to get the status flags */
/*
* currently implemented sources
*/
#define NSSRC_FILES "files" /* local files */
#define NSSRC_DNS "dns" /* DNS; IN for hosts, HS for others */
#define NSSRC_NIS "nis" /* YP/NIS */
#define NSSRC_COMPAT "compat" /* passwd,group in YP compat mode */
/*
* currently implemented databases
*/
#define NSDB_HOSTS "hosts"
#define NSDB_GROUP "group"
#define NSDB_GROUP_COMPAT "group_compat"
#define NSDB_NETGROUP "netgroup"
#define NSDB_NETWORKS "networks"
#define NSDB_PASSWD "passwd"
#define NSDB_PASSWD_COMPAT "passwd_compat"
#define NSDB_SHELLS "shells"
/*
* suggested databases to implement
*/
#define NSDB_ALIASES "aliases"
#define NSDB_AUTH "auth"
#define NSDB_AUTOMOUNT "automount"
#define NSDB_BOOTPARAMS "bootparams"
#define NSDB_ETHERS "ethers"
#define NSDB_EXPORTS "exports"
#define NSDB_NETMASKS "netmasks"
#define NSDB_PHONES "phones"
#define NSDB_PRINTCAP "printcap"
#define NSDB_PROTOCOLS "protocols"
#define NSDB_REMOTE "remote"
#define NSDB_RPC "rpc"
#define NSDB_SENDMAILVARS "sendmailvars"
#define NSDB_SERVICES "services"
#define NSDB_TERMCAP "termcap"
#define NSDB_TTYS "ttys"
/*
* ns_dtab `method' function signature.
*/
typedef int (*nss_method)(void *_retval, void *_mdata, va_list _ap);
/*
* Macro for generating method prototypes.
*/
#define NSS_METHOD_PROTOTYPE(method) \
int method(void *, void *, va_list)
/*
* ns_dtab - `nsswitch dispatch table'
* Contains an entry for each source and the appropriate function to
* call. ns_dtabs are used in the nsdispatch() API in order to allow
* the application to override built-in actions.
*/
typedef struct _ns_dtab {
const char *src; /* Source this entry implements */
nss_method method; /* Method to be called */
void *mdata; /* Data passed to method */
} ns_dtab;
/*
* macros to help build an ns_dtab[]
*/
#define NS_FILES_CB(F,C) { NSSRC_FILES, F, C },
#define NS_COMPAT_CB(F,C) { NSSRC_COMPAT, F, C },
#ifdef HESIOD
# define NS_DNS_CB(F,C) { NSSRC_DNS, F, C },
#else
# define NS_DNS_CB(F,C)
#endif
#ifdef YP
# define NS_NIS_CB(F,C) { NSSRC_NIS, F, C },
#else
# define NS_NIS_CB(F,C)
#endif
/*
* ns_src - `nsswitch source'
* used by the nsparser routines to store a mapping between a source
* and its dispatch control flags for a given database.
*/
typedef struct _ns_src {
const char *name;
u_int32_t flags;
} ns_src;
/*
* default sourcelist (if nsswitch.conf is missing, corrupt,
* or the requested database doesn't have an entry.
*/
extern const ns_src __nsdefaultsrc[];
/*
* ns_mtab - NSS method table
* An NSS module provides a mapping from (database name, method name)
* tuples to the nss_method and associated data.
*/
typedef struct _ns_mtab {
const char *database;
const char *name;
nss_method method;
void *mdata;
} ns_mtab;
/*
* NSS module de-registration, called at module unload.
*/
typedef void (*nss_module_unregister_fn)(ns_mtab *, unsigned int);
/*
* NSS module registration, called at module load.
*/
typedef ns_mtab *(*nss_module_register_fn)(const char *, unsigned int *,
nss_module_unregister_fn *);
/*
* Many NSS interfaces follow the getXXnam, getXXid, getXXent pattern.
* Developers are encouraged to use nss_lookup_type where approriate.
*/
enum nss_lookup_type {
nss_lt_name = 1,
nss_lt_id = 2,
nss_lt_all = 3
};
#ifdef _NS_PRIVATE
/*
* private data structures for back-end nsswitch implementation
*/
/*
* ns_dbt - `nsswitch database thang'
* for each database in /etc/nsswitch.conf there is a ns_dbt, with its
* name and a list of ns_src's containing the source information.
*/
typedef struct _ns_dbt {
const char *name; /* name of database */
ns_src *srclist; /* list of sources */
int srclistsize; /* size of srclist */
} ns_dbt;
/*
* ns_mod - NSS module
*/
typedef struct _ns_mod {
char *name; /* module name */
void *handle; /* handle from dlopen */
ns_mtab *mtab; /* method table */
unsigned int mtabsize; /* count of entries in method table */
nss_module_unregister_fn unregister; /* called to unload module */
} ns_mod;
#endif /* _NS_PRIVATE */
#include <sys/cdefs.h>
__BEGIN_DECLS
extern int nsdispatch(void *, const ns_dtab [], const char *,
const char *, const ns_src [], ...);
#ifdef _NS_PRIVATE
extern void _nsdbtaddsrc(ns_dbt *, const ns_src *);
extern void _nsdbtput(const ns_dbt *);
extern void _nsyyerror(const char *);
extern int _nsyylex(void);
extern int _nsyyparse(void);
extern int _nsyylineno;
#ifdef _NSS_DEBUG
extern void _nsdbtdump(const ns_dbt *);
#endif
#endif /* _NS_PRIVATE */
__END_DECLS
#endif /* !_NSSWITCH_H */
|
