1 /*-
2 * Copyright (c) 2003 Networks Associates Technology, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by
6 * Jacques A. Vidrine, Safeport Network Services, and Network
7 * Associates Laboratories, the Security Research Division of Network
8 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
9 * ("CBOSS"), as part of the DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * Compatibility shims for the GNU C Library-style nsswitch interface.
33 *
34 * $FreeBSD: src/lib/libc/net/nss_compat.c,v 1.3 2004/03/30 15:56:15 nectar Exp $
35 */
36
37 #include "namespace.h"
38 #include <sys/param.h>
39 #include <errno.h>
40 #include <nss.h>
41 #include <pthread.h>
42 #include <pthread_np.h>
43 #include "un-namespace.h"
44 #include "libc_private.h"
45
46
47 struct group;
48 struct passwd;
49
50 static int terminator;
51
52 #define DECLARE_TERMINATOR(x) \
53 static pthread_key_t _term_key_##x; \
54 static void \
55 _term_create_##x(void) \
56 { \
57 _pthread_key_create(&_term_key_##x, NULL); \
58 } \
59 static void *_term_main_##x; \
60 static pthread_once_t _term_once_##x = PTHREAD_ONCE_INIT
61
62 #define SET_TERMINATOR(x, y) \
63 do { \
64 if (!__isthreaded || _pthread_main_np()) \
65 _term_main_##x = (y); \
66 else { \
67 _pthread_once(&_term_once_##x, _term_create_##x); \
68 _pthread_setspecific(_term_key_##x, y); \
69 } \
70 } while (0)
71
72 #define CHECK_TERMINATOR(x) \
73 (!__isthreaded || _pthread_main_np() ? \
74 (_term_main_##x) : \
75 (_pthread_once(&_term_once_##x, _term_create_##x), \
76 _pthread_getspecific(_term_key_##x)))
77
78
79
80 DECLARE_TERMINATOR(group);
81
82 int __nss_compat_getgrnam_r(void *, void *, va_list);
83 int __nss_compat_getgrgid_r(void *, void *, va_list);
84 int __nss_compat_getgrent_r(void *, void *, va_list);
85 int __nss_compat_setgrent(void *, void *, va_list);
86 int __nss_compat_endgrent(void *, void *, va_list);
87
88 int
__nss_compat_getgrnam_r(void * retval,void * mdata,va_list ap)89 __nss_compat_getgrnam_r(void *retval, void *mdata, va_list ap)
90 {
91 int (*fn)(const char *, struct group *, char *, size_t, int *);
92 const char *name;
93 struct group *grp;
94 char *buffer;
95 int *errnop;
96 size_t bufsize;
97 enum nss_status status;
98
99 fn = mdata;
100 name = va_arg(ap, const char *);
101 grp = va_arg(ap, struct group *);
102 buffer = va_arg(ap, char *);
103 bufsize = va_arg(ap, size_t);
104 errnop = va_arg(ap, int *);
105 status = fn(name, grp, buffer, bufsize, errnop);
106 status = __nss_compat_result(status, *errnop);
107 if (status == NS_SUCCESS)
108 *(struct group **)retval = grp;
109 return (status);
110 }
111
112
113 int
__nss_compat_getgrgid_r(void * retval,void * mdata,va_list ap)114 __nss_compat_getgrgid_r(void *retval, void *mdata, va_list ap)
115 {
116 int (*fn)(gid_t, struct group *, char *, size_t, int *);
117 gid_t gid;
118 struct group *grp;
119 char *buffer;
120 int *errnop;
121 size_t bufsize;
122 enum nss_status status;
123
124 fn = mdata;
125 gid = va_arg(ap, gid_t);
126 grp = va_arg(ap, struct group *);
127 buffer = va_arg(ap, char *);
128 bufsize = va_arg(ap, size_t);
129 errnop = va_arg(ap, int *);
130 status = fn(gid, grp, buffer, bufsize, errnop);
131 status = __nss_compat_result(status, *errnop);
132 if (status == NS_SUCCESS)
133 *(struct group **)retval = grp;
134 return (status);
135 }
136
137
138 int
__nss_compat_getgrent_r(void * retval,void * mdata,va_list ap)139 __nss_compat_getgrent_r(void *retval, void *mdata, va_list ap)
140 {
141 int (*fn)(struct group *, char *, size_t, int *);
142 struct group *grp;
143 char *buffer;
144 int *errnop;
145 size_t bufsize;
146 enum nss_status status;
147
148 if (CHECK_TERMINATOR(group))
149 return (NS_NOTFOUND);
150 fn = mdata;
151 grp = va_arg(ap, struct group *);
152 buffer = va_arg(ap, char *);
153 bufsize = va_arg(ap, size_t);
154 errnop = va_arg(ap, int *);
155 status = fn(grp, buffer, bufsize, errnop);
156 status = __nss_compat_result(status, *errnop);
157 if (status == NS_SUCCESS)
158 *(struct group **)retval = grp;
159 else if (status != NS_RETURN)
160 SET_TERMINATOR(group, &terminator);
161 return (status);
162 }
163
164
165 int
__nss_compat_setgrent(void * retval __unused,void * mdata,va_list ap __unused)166 __nss_compat_setgrent(void *retval __unused, void *mdata, va_list ap __unused)
167 {
168
169 SET_TERMINATOR(group, NULL);
170 ((int (*)(void))mdata)();
171 return (NS_UNAVAIL);
172 }
173
174
175 int
__nss_compat_endgrent(void * retval __unused,void * mdata,va_list ap __unused)176 __nss_compat_endgrent(void *retval __unused, void *mdata, va_list ap __unused)
177 {
178
179 SET_TERMINATOR(group, NULL);
180 ((int (*)(void))mdata)();
181 return (NS_UNAVAIL);
182 }
183
184
185
186 DECLARE_TERMINATOR(passwd);
187
188 int __nss_compat_getpwnam_r(void *, void *, va_list);
189 int __nss_compat_getpwuid_r(void *, void *, va_list);
190 int __nss_compat_getpwent_r(void *, void *, va_list);
191 int __nss_compat_setpwent(void *, void *, va_list);
192 int __nss_compat_endpwent(void *, void *, va_list);
193
194 int
__nss_compat_getpwnam_r(void * retval,void * mdata,va_list ap)195 __nss_compat_getpwnam_r(void *retval, void *mdata, va_list ap)
196 {
197 int (*fn)(const char *, struct passwd *, char *, size_t, int *);
198 const char *name;
199 struct passwd *pwd;
200 char *buffer;
201 int *errnop;
202 size_t bufsize;
203 enum nss_status status;
204
205 fn = mdata;
206 name = va_arg(ap, const char *);
207 pwd = va_arg(ap, struct passwd *);
208 buffer = va_arg(ap, char *);
209 bufsize = va_arg(ap, size_t);
210 errnop = va_arg(ap, int *);
211 status = fn(name, pwd, buffer, bufsize, errnop);
212 status = __nss_compat_result(status, *errnop);
213 if (status == NS_SUCCESS)
214 *(struct passwd **)retval = pwd;
215 return (status);
216 }
217
218
219 int
__nss_compat_getpwuid_r(void * retval,void * mdata,va_list ap)220 __nss_compat_getpwuid_r(void *retval, void *mdata, va_list ap)
221 {
222 int (*fn)(uid_t, struct passwd *, char *, size_t, int *);
223 uid_t uid;
224 struct passwd *pwd;
225 char *buffer;
226 int *errnop;
227 size_t bufsize;
228 enum nss_status status;
229
230 fn = mdata;
231 uid = va_arg(ap, uid_t);
232 pwd = va_arg(ap, struct passwd *);
233 buffer = va_arg(ap, char *);
234 bufsize = va_arg(ap, size_t);
235 errnop = va_arg(ap, int *);
236 status = fn(uid, pwd, buffer, bufsize, errnop);
237 status = __nss_compat_result(status, *errnop);
238 if (status == NS_SUCCESS)
239 *(struct passwd **)retval = pwd;
240 return (status);
241 }
242
243
244 int
__nss_compat_getpwent_r(void * retval,void * mdata,va_list ap)245 __nss_compat_getpwent_r(void *retval, void *mdata, va_list ap)
246 {
247 int (*fn)(struct passwd *, char *, size_t, int *);
248 struct passwd *pwd;
249 char *buffer;
250 int *errnop;
251 size_t bufsize;
252 enum nss_status status;
253
254 if (CHECK_TERMINATOR(passwd))
255 return (NS_NOTFOUND);
256 fn = mdata;
257 pwd = va_arg(ap, struct passwd *);
258 buffer = va_arg(ap, char *);
259 bufsize = va_arg(ap, size_t);
260 errnop = va_arg(ap, int *);
261 status = fn(pwd, buffer, bufsize, errnop);
262 status = __nss_compat_result(status, *errnop);
263 if (status == NS_SUCCESS)
264 *(struct passwd **)retval = pwd;
265 else if (status != NS_RETURN)
266 SET_TERMINATOR(passwd, &terminator);
267 return (status);
268 }
269
270
271 int
__nss_compat_setpwent(void * retval __unused,void * mdata,va_list ap __unused)272 __nss_compat_setpwent(void *retval __unused, void *mdata, va_list ap __unused)
273 {
274
275 SET_TERMINATOR(passwd, NULL);
276 ((int (*)(void))mdata)();
277 return (NS_UNAVAIL);
278 }
279
280
281 int
__nss_compat_endpwent(void * retval __unused,void * mdata,va_list ap __unused)282 __nss_compat_endpwent(void *retval __unused, void *mdata, va_list ap __unused)
283 {
284
285 SET_TERMINATOR(passwd, NULL);
286 ((int (*)(void))mdata)();
287 return (NS_UNAVAIL);
288 }
289