2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2003 Networks Associates Technology, Inc.
7 * This software was developed for the FreeBSD Project by
8 * Jacques A. Vidrine, Safeport Network Services, and Network
9 * Associates Laboratories, the Security Research Division of Network
10 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
11 * ("CBOSS"), as part of the DARPA CHATS research program.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Compatibility shims for the GNU C Library-style nsswitch interface.
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include "namespace.h"
40 #include <sys/param.h>
44 #include <pthread_np.h>
45 #include "un-namespace.h"
46 #include "libc_private.h"
52 static int terminator;
54 #define DECLARE_TERMINATOR(x) \
55 static pthread_key_t _term_key_##x; \
57 _term_create_##x(void) \
59 (void)_pthread_key_create(&_term_key_##x, NULL); \
61 static void *_term_main_##x; \
62 static pthread_once_t _term_once_##x = PTHREAD_ONCE_INIT
64 #define SET_TERMINATOR(x, y) \
66 if (!__isthreaded || _pthread_main_np()) \
67 _term_main_##x = (y); \
69 (void)_pthread_once(&_term_once_##x, _term_create_##x); \
70 (void)_pthread_setspecific(_term_key_##x, y); \
74 #define CHECK_TERMINATOR(x) \
75 (!__isthreaded || _pthread_main_np() ? \
77 ((void)_pthread_once(&_term_once_##x, _term_create_##x), \
78 _pthread_getspecific(_term_key_##x)))
82 DECLARE_TERMINATOR(group);
84 int __nss_compat_getgrnam_r(void *retval, void *mdata, va_list ap);
85 int __nss_compat_getgrgid_r(void *retval, void *mdata, va_list ap);
86 int __nss_compat_getgrent_r(void *retval, void *mdata, va_list ap);
87 int __nss_compat_setgrent(void *retval, void *mdata, va_list ap);
88 int __nss_compat_endgrent(void *retval, void *mdata, va_list ap);
89 int __nss_compat_getpwnam_r(void *retval, void *mdata, va_list ap);
90 int __nss_compat_getpwuid_r(void *retval, void *mdata, va_list ap);
91 int __nss_compat_getpwent_r(void *retval, void *mdata, va_list ap);
92 int __nss_compat_setpwent(void *retval, void *mdata, va_list ap);
93 int __nss_compat_endpwent(void *retval, void *mdata, va_list ap);
96 __nss_compat_getgrnam_r(void *retval, void *mdata, va_list ap)
98 int (*fn)(const char *, struct group *, char *, size_t, int *);
102 int *errnop, ns_status;
104 enum nss_status nss_status;
107 name = va_arg(ap, const char *);
108 grp = va_arg(ap, struct group *);
109 buffer = va_arg(ap, char *);
110 bufsize = va_arg(ap, size_t);
111 errnop = va_arg(ap, int *);
112 nss_status = fn(name, grp, buffer, bufsize, errnop);
113 ns_status = __nss_compat_result(nss_status, *errnop);
114 if (ns_status == NS_SUCCESS)
115 *(struct group **)retval = grp;
121 __nss_compat_getgrgid_r(void *retval, void *mdata, va_list ap)
123 int (*fn)(gid_t, struct group *, char *, size_t, int *);
127 int *errnop, ns_status;
129 enum nss_status nss_status;
132 gid = va_arg(ap, gid_t);
133 grp = va_arg(ap, struct group *);
134 buffer = va_arg(ap, char *);
135 bufsize = va_arg(ap, size_t);
136 errnop = va_arg(ap, int *);
137 nss_status = fn(gid, grp, buffer, bufsize, errnop);
138 ns_status = __nss_compat_result(nss_status, *errnop);
139 if (ns_status == NS_SUCCESS)
140 *(struct group **)retval = grp;
146 __nss_compat_getgrent_r(void *retval, void *mdata, va_list ap)
148 int (*fn)(struct group *, char *, size_t, int *);
151 int *errnop, ns_status;
153 enum nss_status nss_status;
155 if (CHECK_TERMINATOR(group))
156 return (NS_NOTFOUND);
158 grp = va_arg(ap, struct group *);
159 buffer = va_arg(ap, char *);
160 bufsize = va_arg(ap, size_t);
161 errnop = va_arg(ap, int *);
162 nss_status = fn(grp, buffer, bufsize, errnop);
163 ns_status = __nss_compat_result(nss_status, *errnop);
164 if (ns_status == NS_SUCCESS)
165 *(struct group **)retval = grp;
166 else if (ns_status != NS_RETURN)
167 SET_TERMINATOR(group, &terminator);
173 __nss_compat_setgrent(void *retval, void *mdata, va_list ap)
176 SET_TERMINATOR(group, NULL);
177 ((int (*)(void))mdata)();
183 __nss_compat_endgrent(void *retval, void *mdata, va_list ap)
186 SET_TERMINATOR(group, NULL);
187 ((int (*)(void))mdata)();
193 DECLARE_TERMINATOR(passwd);
197 __nss_compat_getpwnam_r(void *retval, void *mdata, va_list ap)
199 int (*fn)(const char *, struct passwd *, char *, size_t, int *);
203 int *errnop, ns_status;
205 enum nss_status nss_status;
208 name = va_arg(ap, const char *);
209 pwd = va_arg(ap, struct passwd *);
210 buffer = va_arg(ap, char *);
211 bufsize = va_arg(ap, size_t);
212 errnop = va_arg(ap, int *);
213 nss_status = fn(name, pwd, buffer, bufsize, errnop);
214 ns_status = __nss_compat_result(nss_status, *errnop);
215 if (ns_status == NS_SUCCESS)
216 *(struct passwd **)retval = pwd;
222 __nss_compat_getpwuid_r(void *retval, void *mdata, va_list ap)
224 int (*fn)(uid_t, struct passwd *, char *, size_t, int *);
228 int *errnop, ns_status;
230 enum nss_status nss_status;
233 uid = va_arg(ap, uid_t);
234 pwd = va_arg(ap, struct passwd *);
235 buffer = va_arg(ap, char *);
236 bufsize = va_arg(ap, size_t);
237 errnop = va_arg(ap, int *);
238 nss_status = fn(uid, pwd, buffer, bufsize, errnop);
239 ns_status = __nss_compat_result(nss_status, *errnop);
240 if (ns_status == NS_SUCCESS)
241 *(struct passwd **)retval = pwd;
247 __nss_compat_getpwent_r(void *retval, void *mdata, va_list ap)
249 int (*fn)(struct passwd *, char *, size_t, int *);
252 int *errnop, ns_status;
254 enum nss_status nss_status;
256 if (CHECK_TERMINATOR(passwd))
257 return (NS_NOTFOUND);
259 pwd = va_arg(ap, struct passwd *);
260 buffer = va_arg(ap, char *);
261 bufsize = va_arg(ap, size_t);
262 errnop = va_arg(ap, int *);
263 nss_status = fn(pwd, buffer, bufsize, errnop);
264 ns_status = __nss_compat_result(nss_status, *errnop);
265 if (ns_status == NS_SUCCESS)
266 *(struct passwd **)retval = pwd;
267 else if (ns_status != NS_RETURN)
268 SET_TERMINATOR(passwd, &terminator);
274 __nss_compat_setpwent(void *retval, void *mdata, va_list ap)
277 SET_TERMINATOR(passwd, NULL);
278 ((int (*)(void))mdata)();
284 __nss_compat_endpwent(void *retval, void *mdata, va_list ap)
287 SET_TERMINATOR(passwd, NULL);
288 ((int (*)(void))mdata)();