2 * Copyright (C) Stefan Metzmacher 2007 <metze@samba.org>
3 * Copyright (C) Guenther Deschner 2009 <gd@samba.org>
4 * Copyright (C) Andreas Schneider 2013 <asn@samba.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the author nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 #include <sys/types.h>
42 #include <sys/socket.h>
59 * Defining _POSIX_PTHREAD_SEMANTICS before including pwd.h and grp.h gives us
60 * the posix getpwnam_r(), getpwuid_r(), getgrnam_r and getgrgid_r calls on
63 #ifndef _POSIX_PTHREAD_SEMANTICS
64 #define _POSIX_PTHREAD_SEMANTICS
71 #endif /* HAVE_SHADOW_H */
74 #include <arpa/inet.h>
75 #include <netinet/in.h>
79 #if defined(HAVE_NSS_H)
83 typedef enum nss_status NSS_STATUS;
84 #elif defined(HAVE_NSS_COMMON_H)
86 #include <nss_common.h>
87 #include <nss_dbdefs.h>
90 typedef nss_status_t NSS_STATUS;
92 # define NSS_STATUS_SUCCESS NSS_SUCCESS
93 # define NSS_STATUS_NOTFOUND NSS_NOTFOUND
94 # define NSS_STATUS_UNAVAIL NSS_UNAVAIL
95 # define NSS_STATUS_TRYAGAIN NSS_TRYAGAIN
97 # error "No nsswitch support detected"
101 #define PTR_DIFF(p1, p2) ((ptrdiff_t)(((const char *)(p1)) - (const char *)(p2)))
109 #define EAI_NODATA EAI_NONAME
112 #ifndef EAI_ADDRFAMILY
113 #define EAI_ADDRFAMILY EAI_FAMILY
117 #define __STRING(x) #x
120 #ifndef __STRINGSTRING
121 #define __STRINGSTRING(x) __STRING(x)
125 #define __LINESTR__ __STRINGSTRING(__LINE__)
129 #define __location__ __FILE__ ":" __LINESTR__
133 #define DNS_NAME_MAX 255
136 /* GCC have printf type attribute check. */
137 #ifdef HAVE_ATTRIBUTE_PRINTF_FORMAT
138 #define PRINTF_ATTRIBUTE(a,b) __attribute__ ((__format__ (__printf__, a, b)))
140 #define PRINTF_ATTRIBUTE(a,b)
141 #endif /* HAVE_ATTRIBUTE_PRINTF_FORMAT */
143 #ifdef HAVE_DESTRUCTOR_ATTRIBUTE
144 #define DESTRUCTOR_ATTRIBUTE __attribute__ ((destructor))
146 #define DESTRUCTOR_ATTRIBUTE
147 #endif /* HAVE_DESTRUCTOR_ATTRIBUTE */
149 #define ZERO_STRUCTP(x) do { if ((x) != NULL) memset((char *)(x), 0, sizeof(*(x))); } while(0)
152 #define SAFE_FREE(x) do { if ((x) != NULL) {free(x); (x)=NULL;} } while(0)
156 #define NWRAP_INET_ADDRSTRLEN INET6_ADDRSTRLEN
158 #define NWRAP_INET_ADDRSTRLEN INET_ADDRSTRLEN
161 #define NWRAP_LOCK(m) do { \
162 pthread_mutex_lock(&( m ## _mutex)); \
165 #define NWRAP_UNLOCK(m) do { \
166 pthread_mutex_unlock(&( m ## _mutex)); \
170 static bool nwrap_initialized = false;
171 static pthread_mutex_t nwrap_initialized_mutex = PTHREAD_MUTEX_INITIALIZER;
173 /* The mutex or accessing the id */
174 static pthread_mutex_t nwrap_global_mutex = PTHREAD_MUTEX_INITIALIZER;
175 static pthread_mutex_t nwrap_gr_global_mutex = PTHREAD_MUTEX_INITIALIZER;
176 static pthread_mutex_t nwrap_he_global_mutex = PTHREAD_MUTEX_INITIALIZER;
177 static pthread_mutex_t nwrap_pw_global_mutex = PTHREAD_MUTEX_INITIALIZER;
178 static pthread_mutex_t nwrap_sp_global_mutex = PTHREAD_MUTEX_INITIALIZER;
180 /* Add new global locks here please */
181 /* Also don't forget to add locks to
182 * nwrap_init() function.
184 # define NWRAP_LOCK_ALL do { \
185 NWRAP_LOCK(nwrap_initialized); \
186 NWRAP_LOCK(nwrap_global); \
187 NWRAP_LOCK(nwrap_gr_global); \
188 NWRAP_LOCK(nwrap_he_global); \
189 NWRAP_LOCK(nwrap_pw_global); \
190 NWRAP_LOCK(nwrap_sp_global); \
193 # define NWRAP_UNLOCK_ALL do {\
194 NWRAP_UNLOCK(nwrap_sp_global); \
195 NWRAP_UNLOCK(nwrap_pw_global); \
196 NWRAP_UNLOCK(nwrap_he_global); \
197 NWRAP_UNLOCK(nwrap_gr_global); \
198 NWRAP_UNLOCK(nwrap_global); \
199 NWRAP_UNLOCK(nwrap_initialized); \
202 static void nwrap_thread_prepare(void)
207 static void nwrap_thread_parent(void)
212 static void nwrap_thread_child(void)
217 enum nwrap_dbglvl_e {
225 # define NWRAP_LOG(...)
228 static void nwrap_log(enum nwrap_dbglvl_e dbglvl, const char *func, const char *format, ...) PRINTF_ATTRIBUTE(3, 4);
229 # define NWRAP_LOG(dbglvl, ...) nwrap_log((dbglvl), __func__, __VA_ARGS__)
231 static void nwrap_log(enum nwrap_dbglvl_e dbglvl,
233 const char *format, ...)
238 unsigned int lvl = 0;
241 d = getenv("NSS_WRAPPER_DEBUGLEVEL");
246 va_start(va, format);
247 vsnprintf(buffer, sizeof(buffer), format, va);
252 case NWRAP_LOG_ERROR:
254 "NWRAP_ERROR(%d) - %s: %s\n",
259 "NWRAP_WARN(%d) - %s: %s\n",
262 case NWRAP_LOG_DEBUG:
264 "NWRAP_DEBUG(%d) - %s: %s\n",
267 case NWRAP_LOG_TRACE:
269 "NWRAP_TRACE(%d) - %s: %s\n",
275 #endif /* NDEBUG NWRAP_LOG */
277 struct nwrap_libc_fns {
278 struct passwd *(*_libc_getpwnam)(const char *name);
279 int (*_libc_getpwnam_r)(const char *name, struct passwd *pwd,
280 char *buf, size_t buflen, struct passwd **result);
281 struct passwd *(*_libc_getpwuid)(uid_t uid);
282 int (*_libc_getpwuid_r)(uid_t uid, struct passwd *pwd, char *buf, size_t buflen, struct passwd **result);
283 void (*_libc_setpwent)(void);
284 struct passwd *(*_libc_getpwent)(void);
285 #ifdef HAVE_SOLARIS_GETPWENT_R
286 struct passwd *(*_libc_getpwent_r)(struct passwd *pwbuf, char *buf, size_t buflen);
288 int (*_libc_getpwent_r)(struct passwd *pwbuf, char *buf, size_t buflen, struct passwd **pwbufp);
290 void (*_libc_endpwent)(void);
291 int (*_libc_initgroups)(const char *user, gid_t gid);
292 struct group *(*_libc_getgrnam)(const char *name);
293 int (*_libc_getgrnam_r)(const char *name, struct group *grp, char *buf, size_t buflen, struct group **result);
294 struct group *(*_libc_getgrgid)(gid_t gid);
295 int (*_libc_getgrgid_r)(gid_t gid, struct group *grp, char *buf, size_t buflen, struct group **result);
296 void (*_libc_setgrent)(void);
297 struct group *(*_libc_getgrent)(void);
298 #ifdef HAVE_SOLARIS_GETGRENT_R
299 struct group *(*_libc_getgrent_r)(struct group *group, char *buf, size_t buflen);
301 int (*_libc_getgrent_r)(struct group *group, char *buf, size_t buflen, struct group **result);
303 void (*_libc_endgrent)(void);
304 int (*_libc_getgrouplist)(const char *user, gid_t group, gid_t *groups, int *ngroups);
306 void (*_libc_sethostent)(int stayopen);
307 struct hostent *(*_libc_gethostent)(void);
308 void (*_libc_endhostent)(void);
310 struct hostent *(*_libc_gethostbyname)(const char *name);
311 #ifdef HAVE_GETHOSTBYNAME2 /* GNU extension */
312 struct hostent *(*_libc_gethostbyname2)(const char *name, int af);
314 struct hostent *(*_libc_gethostbyaddr)(const void *addr, socklen_t len, int type);
316 int (*_libc_getaddrinfo)(const char *node, const char *service,
317 const struct addrinfo *hints,
318 struct addrinfo **res);
319 int (*_libc_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
320 char *host, size_t hostlen,
321 char *serv, size_t servlen,
323 int (*_libc_gethostname)(char *name, size_t len);
324 #ifdef HAVE_GETHOSTBYNAME_R
325 int (*_libc_gethostbyname_r)(const char *name,
327 char *buf, size_t buflen,
328 struct hostent **result, int *h_errnop);
330 #ifdef HAVE_GETHOSTBYADDR_R
331 int (*_libc_gethostbyaddr_r)(const void *addr, socklen_t len, int type,
333 char *buf, size_t buflen,
334 struct hostent **result, int *h_errnop);
338 struct nwrap_module_nss_fns {
339 NSS_STATUS (*_nss_getpwnam_r)(const char *name, struct passwd *result, char *buffer,
340 size_t buflen, int *errnop);
341 NSS_STATUS (*_nss_getpwuid_r)(uid_t uid, struct passwd *result, char *buffer,
342 size_t buflen, int *errnop);
343 NSS_STATUS (*_nss_setpwent)(void);
344 NSS_STATUS (*_nss_getpwent_r)(struct passwd *result, char *buffer,
345 size_t buflen, int *errnop);
346 NSS_STATUS (*_nss_endpwent)(void);
347 NSS_STATUS (*_nss_initgroups)(const char *user, gid_t group, long int *start,
348 long int *size, gid_t **groups, long int limit, int *errnop);
349 NSS_STATUS (*_nss_getgrnam_r)(const char *name, struct group *result, char *buffer,
350 size_t buflen, int *errnop);
351 NSS_STATUS (*_nss_getgrgid_r)(gid_t gid, struct group *result, char *buffer,
352 size_t buflen, int *errnop);
353 NSS_STATUS (*_nss_setgrent)(void);
354 NSS_STATUS (*_nss_getgrent_r)(struct group *result, char *buffer,
355 size_t buflen, int *errnop);
356 NSS_STATUS (*_nss_endgrent)(void);
359 struct nwrap_backend {
363 struct nwrap_ops *ops;
364 struct nwrap_module_nss_fns *fns;
368 struct passwd * (*nw_getpwnam)(struct nwrap_backend *b,
370 int (*nw_getpwnam_r)(struct nwrap_backend *b,
371 const char *name, struct passwd *pwdst,
372 char *buf, size_t buflen, struct passwd **pwdstp);
373 struct passwd * (*nw_getpwuid)(struct nwrap_backend *b,
375 int (*nw_getpwuid_r)(struct nwrap_backend *b,
376 uid_t uid, struct passwd *pwdst,
377 char *buf, size_t buflen, struct passwd **pwdstp);
378 void (*nw_setpwent)(struct nwrap_backend *b);
379 struct passwd * (*nw_getpwent)(struct nwrap_backend *b);
380 int (*nw_getpwent_r)(struct nwrap_backend *b,
381 struct passwd *pwdst, char *buf,
382 size_t buflen, struct passwd **pwdstp);
383 void (*nw_endpwent)(struct nwrap_backend *b);
384 int (*nw_initgroups)(struct nwrap_backend *b,
385 const char *user, gid_t group);
386 struct group * (*nw_getgrnam)(struct nwrap_backend *b,
388 int (*nw_getgrnam_r)(struct nwrap_backend *b,
389 const char *name, struct group *grdst,
390 char *buf, size_t buflen, struct group **grdstp);
391 struct group * (*nw_getgrgid)(struct nwrap_backend *b,
393 int (*nw_getgrgid_r)(struct nwrap_backend *b,
394 gid_t gid, struct group *grdst,
395 char *buf, size_t buflen, struct group **grdstp);
396 void (*nw_setgrent)(struct nwrap_backend *b);
397 struct group * (*nw_getgrent)(struct nwrap_backend *b);
398 int (*nw_getgrent_r)(struct nwrap_backend *b,
399 struct group *grdst, char *buf,
400 size_t buflen, struct group **grdstp);
401 void (*nw_endgrent)(struct nwrap_backend *b);
404 /* Public prototypes */
406 bool nss_wrapper_enabled(void);
407 bool nss_wrapper_shadow_enabled(void);
408 bool nss_wrapper_hosts_enabled(void);
410 /* prototypes for files backend */
413 static struct passwd *nwrap_files_getpwnam(struct nwrap_backend *b,
415 static int nwrap_files_getpwnam_r(struct nwrap_backend *b,
416 const char *name, struct passwd *pwdst,
417 char *buf, size_t buflen, struct passwd **pwdstp);
418 static struct passwd *nwrap_files_getpwuid(struct nwrap_backend *b,
420 static int nwrap_files_getpwuid_r(struct nwrap_backend *b,
421 uid_t uid, struct passwd *pwdst,
422 char *buf, size_t buflen, struct passwd **pwdstp);
423 static void nwrap_files_setpwent(struct nwrap_backend *b);
424 static struct passwd *nwrap_files_getpwent(struct nwrap_backend *b);
425 static int nwrap_files_getpwent_r(struct nwrap_backend *b,
426 struct passwd *pwdst, char *buf,
427 size_t buflen, struct passwd **pwdstp);
428 static void nwrap_files_endpwent(struct nwrap_backend *b);
429 static int nwrap_files_initgroups(struct nwrap_backend *b,
430 const char *user, gid_t group);
431 static struct group *nwrap_files_getgrnam(struct nwrap_backend *b,
433 static int nwrap_files_getgrnam_r(struct nwrap_backend *b,
434 const char *name, struct group *grdst,
435 char *buf, size_t buflen, struct group **grdstp);
436 static struct group *nwrap_files_getgrgid(struct nwrap_backend *b,
438 static int nwrap_files_getgrgid_r(struct nwrap_backend *b,
439 gid_t gid, struct group *grdst,
440 char *buf, size_t buflen, struct group **grdstp);
441 static void nwrap_files_setgrent(struct nwrap_backend *b);
442 static struct group *nwrap_files_getgrent(struct nwrap_backend *b);
443 static int nwrap_files_getgrent_r(struct nwrap_backend *b,
444 struct group *grdst, char *buf,
445 size_t buflen, struct group **grdstp);
446 static void nwrap_files_endgrent(struct nwrap_backend *b);
448 /* prototypes for module backend */
450 static struct passwd *nwrap_module_getpwent(struct nwrap_backend *b);
451 static int nwrap_module_getpwent_r(struct nwrap_backend *b,
452 struct passwd *pwdst, char *buf,
453 size_t buflen, struct passwd **pwdstp);
454 static struct passwd *nwrap_module_getpwnam(struct nwrap_backend *b,
456 static int nwrap_module_getpwnam_r(struct nwrap_backend *b,
457 const char *name, struct passwd *pwdst,
458 char *buf, size_t buflen, struct passwd **pwdstp);
459 static struct passwd *nwrap_module_getpwuid(struct nwrap_backend *b,
461 static int nwrap_module_getpwuid_r(struct nwrap_backend *b,
462 uid_t uid, struct passwd *pwdst,
463 char *buf, size_t buflen, struct passwd **pwdstp);
464 static void nwrap_module_setpwent(struct nwrap_backend *b);
465 static void nwrap_module_endpwent(struct nwrap_backend *b);
466 static struct group *nwrap_module_getgrent(struct nwrap_backend *b);
467 static int nwrap_module_getgrent_r(struct nwrap_backend *b,
468 struct group *grdst, char *buf,
469 size_t buflen, struct group **grdstp);
470 static struct group *nwrap_module_getgrnam(struct nwrap_backend *b,
472 static int nwrap_module_getgrnam_r(struct nwrap_backend *b,
473 const char *name, struct group *grdst,
474 char *buf, size_t buflen, struct group **grdstp);
475 static struct group *nwrap_module_getgrgid(struct nwrap_backend *b,
477 static int nwrap_module_getgrgid_r(struct nwrap_backend *b,
478 gid_t gid, struct group *grdst,
479 char *buf, size_t buflen, struct group **grdstp);
480 static void nwrap_module_setgrent(struct nwrap_backend *b);
481 static void nwrap_module_endgrent(struct nwrap_backend *b);
482 static int nwrap_module_initgroups(struct nwrap_backend *b,
483 const char *user, gid_t group);
485 struct nwrap_ops nwrap_files_ops = {
486 .nw_getpwnam = nwrap_files_getpwnam,
487 .nw_getpwnam_r = nwrap_files_getpwnam_r,
488 .nw_getpwuid = nwrap_files_getpwuid,
489 .nw_getpwuid_r = nwrap_files_getpwuid_r,
490 .nw_setpwent = nwrap_files_setpwent,
491 .nw_getpwent = nwrap_files_getpwent,
492 .nw_getpwent_r = nwrap_files_getpwent_r,
493 .nw_endpwent = nwrap_files_endpwent,
494 .nw_initgroups = nwrap_files_initgroups,
495 .nw_getgrnam = nwrap_files_getgrnam,
496 .nw_getgrnam_r = nwrap_files_getgrnam_r,
497 .nw_getgrgid = nwrap_files_getgrgid,
498 .nw_getgrgid_r = nwrap_files_getgrgid_r,
499 .nw_setgrent = nwrap_files_setgrent,
500 .nw_getgrent = nwrap_files_getgrent,
501 .nw_getgrent_r = nwrap_files_getgrent_r,
502 .nw_endgrent = nwrap_files_endgrent,
505 struct nwrap_ops nwrap_module_ops = {
506 .nw_getpwnam = nwrap_module_getpwnam,
507 .nw_getpwnam_r = nwrap_module_getpwnam_r,
508 .nw_getpwuid = nwrap_module_getpwuid,
509 .nw_getpwuid_r = nwrap_module_getpwuid_r,
510 .nw_setpwent = nwrap_module_setpwent,
511 .nw_getpwent = nwrap_module_getpwent,
512 .nw_getpwent_r = nwrap_module_getpwent_r,
513 .nw_endpwent = nwrap_module_endpwent,
514 .nw_initgroups = nwrap_module_initgroups,
515 .nw_getgrnam = nwrap_module_getgrnam,
516 .nw_getgrnam_r = nwrap_module_getgrnam_r,
517 .nw_getgrgid = nwrap_module_getgrgid,
518 .nw_getgrgid_r = nwrap_module_getgrgid_r,
519 .nw_setgrent = nwrap_module_setgrent,
520 .nw_getgrent = nwrap_module_getgrent,
521 .nw_getgrent_r = nwrap_module_getgrent_r,
522 .nw_endgrent = nwrap_module_endgrent,
529 struct nwrap_libc_fns *fns;
534 struct nwrap_backend *backends;
535 struct nwrap_libc *libc;
538 static struct nwrap_main *nwrap_main_global;
539 static struct nwrap_main __nwrap_main_global;
544 static int nwrap_convert_he_ai(const struct hostent *he,
546 const struct addrinfo *hints,
547 struct addrinfo **pai,
548 bool skip_canonname);
554 #define DEFAULT_VECTOR_CAPACITY 16
556 struct nwrap_vector {
562 /* Macro returns pointer to first element of vector->items array.
564 * nwrap_vector is used as a memory backend which take care of
565 * memory allocations and other stuff like memory growing.
566 * nwrap_vectors should not be considered as some abstract structures.
567 * On this level, vectors are more handy than direct realloc/malloc
570 * nwrap_vector->items is array inside nwrap_vector which can be
571 * directly pointed by libc structure assembled by cwrap itself.
575 * 1) struct hostent contains char **h_addr_list element.
576 * 2) nwrap_vector holds array of pointers to addresses.
577 * It's easier to use vector to store results of
580 * Now, pretend that cwrap assembled struct hostent and
581 * we need to set h_addr_list to point to nwrap_vector.
582 * Idea behind is to shield users from internal nwrap_vector
584 * (Yes, not fully - array terminated by NULL is needed because
585 * it's result expected by libc function caller.)
591 * struct nwrap_vector *vector = malloc(sizeof(struct nwrap_vector));
592 * ... don't care about failed allocation now ...
594 * ... fill nwrap vector ...
597 * he.h_addr_list = nwrap_vector_head(vector);
600 #define nwrap_vector_head(vect) ((void *)((vect)->items))
602 #define nwrap_vector_foreach(item, vect, iter) \
603 for (iter = 0, (item) = (vect).items == NULL ? NULL : (vect).items[0]; \
605 (item) = (vect).items[++iter])
607 #define nwrap_vector_is_initialized(vector) ((vector)->items != NULL)
609 static inline bool nwrap_vector_init(struct nwrap_vector *const vector)
611 if (vector == NULL) {
615 /* count is initialized by ZERO_STRUCTP */
616 ZERO_STRUCTP(vector);
617 vector->items = malloc(sizeof(void *) * (DEFAULT_VECTOR_CAPACITY + 1));
618 if (vector->items == NULL) {
621 vector->capacity = DEFAULT_VECTOR_CAPACITY;
622 memset(vector->items, '\0', sizeof(void *) * (DEFAULT_VECTOR_CAPACITY + 1));
627 static bool nwrap_vector_add_item(struct nwrap_vector *vector, void *const item)
629 assert (vector != NULL);
631 if (vector->items == NULL) {
632 nwrap_vector_init(vector);
635 if (vector->count == vector->capacity) {
636 /* Items array _MUST_ be NULL terminated because it's passed
637 * as result to caller which expect NULL terminated array from libc.
639 void **items = realloc(vector->items, sizeof(void *) * ((vector->capacity * 2) + 1));
643 vector->items = items;
645 /* Don't count ending NULL to capacity */
646 vector->capacity *= 2;
649 vector->items[vector->count] = item;
652 vector->items[vector->count] = NULL;
657 static bool nwrap_vector_merge(struct nwrap_vector *dst,
658 struct nwrap_vector *src)
660 void **dst_items = NULL;
663 if (src->count == 0) {
667 count = dst->count + src->count;
669 /* We don't need reallocation if we have enough capacity. */
670 if (src->count > (dst->capacity - dst->count)) {
671 dst_items = (void **)realloc(dst->items, (count + 1) * sizeof(void *));
672 if (dst_items == NULL) {
675 dst->items = dst_items;
676 dst->capacity = count;
679 memcpy((void *)(((long *)dst->items) + dst->count),
681 src->count * sizeof(void *));
694 struct nwrap_vector lines;
696 bool (*parse_line)(struct nwrap_cache *, char *line);
697 void (*unload)(struct nwrap_cache *);
702 struct nwrap_cache *cache;
709 struct nwrap_cache __nwrap_cache_pw;
710 struct nwrap_pw nwrap_pw_global;
712 static bool nwrap_pw_parse_line(struct nwrap_cache *nwrap, char *line);
713 static void nwrap_pw_unload(struct nwrap_cache *nwrap);
716 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
718 struct nwrap_cache *cache;
725 struct nwrap_cache __nwrap_cache_sp;
726 struct nwrap_sp nwrap_sp_global;
728 static bool nwrap_sp_parse_line(struct nwrap_cache *nwrap, char *line);
729 static void nwrap_sp_unload(struct nwrap_cache *nwrap);
730 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
734 struct nwrap_cache *cache;
741 struct nwrap_cache __nwrap_cache_gr;
742 struct nwrap_gr nwrap_gr_global;
745 static bool nwrap_he_parse_line(struct nwrap_cache *nwrap, char *line);
746 static void nwrap_he_unload(struct nwrap_cache *nwrap);
748 struct nwrap_addrdata {
749 unsigned char host_addr[16]; /* IPv4 or IPv6 address */
752 static size_t max_hostents = 100;
754 struct nwrap_entdata {
755 struct nwrap_addrdata addr;
758 struct nwrap_vector nwrap_addrdata;
760 ssize_t aliases_count;
762 struct nwrap_entdata *ed_next;
763 struct nwrap_entdata *ed_tail;
767 struct nwrap_cache *cache;
769 struct nwrap_entdata *list;
770 struct nwrap_vector entdata;
776 static struct nwrap_cache __nwrap_cache_he;
777 static struct nwrap_he nwrap_he_global;
780 /*********************************************************
782 *********************************************************/
784 static void nwrap_init(void);
785 static bool nwrap_gr_parse_line(struct nwrap_cache *nwrap, char *line);
786 static void nwrap_gr_unload(struct nwrap_cache *nwrap);
787 void nwrap_destructor(void) DESTRUCTOR_ATTRIBUTE;
789 /*********************************************************
790 * NWRAP LIBC LOADER FUNCTIONS
791 *********************************************************/
800 static const char *nwrap_str_lib(enum nwrap_lib lib)
807 case NWRAP_LIBSOCKET:
811 /* Compiler would warn us about unhandled enum value if we get here */
816 static void *nwrap_load_lib_handle(enum nwrap_lib lib)
818 int flags = RTLD_LAZY;
823 flags |= RTLD_DEEPBIND;
829 handle = nwrap_main_global->libc->nsl_handle;
830 if (handle == NULL) {
831 for (i = 10; i >= 0; i--) {
832 char soname[256] = {0};
834 snprintf(soname, sizeof(soname), "libnsl.so.%d", i);
835 handle = dlopen(soname, flags);
836 if (handle != NULL) {
841 nwrap_main_global->libc->nsl_handle = handle;
846 case NWRAP_LIBSOCKET:
847 #ifdef HAVE_LIBSOCKET
848 handle = nwrap_main_global->libc->sock_handle;
849 if (handle == NULL) {
850 for (i = 10; i >= 0; i--) {
851 char soname[256] = {0};
853 snprintf(soname, sizeof(soname), "libsocket.so.%d", i);
854 handle = dlopen(soname, flags);
855 if (handle != NULL) {
860 nwrap_main_global->libc->sock_handle = handle;
866 handle = nwrap_main_global->libc->handle;
867 if (handle == NULL) {
868 for (i = 10; i >= 0; i--) {
869 char soname[256] = {0};
871 snprintf(soname, sizeof(soname), "libc.so.%d", i);
872 handle = dlopen(soname, flags);
873 if (handle != NULL) {
878 nwrap_main_global->libc->handle = handle;
883 if (handle == NULL) {
885 handle = nwrap_main_global->libc->handle
886 = nwrap_main_global->libc->sock_handle
887 = nwrap_main_global->libc->nsl_handle
890 NWRAP_LOG(NWRAP_LOG_ERROR,
891 "Failed to dlopen library: %s\n",
900 static void *_nwrap_load_lib_function(enum nwrap_lib lib, const char *fn_name)
907 handle = nwrap_load_lib_handle(lib);
909 func = dlsym(handle, fn_name);
911 NWRAP_LOG(NWRAP_LOG_ERROR,
912 "Failed to find %s: %s\n",
917 NWRAP_LOG(NWRAP_LOG_TRACE,
919 fn_name, nwrap_str_lib(lib));
923 #define nwrap_load_lib_function(lib, fn_name) \
924 if (nwrap_main_global->libc->fns->_libc_##fn_name == NULL) { \
925 *(void **) (&nwrap_main_global->libc->fns->_libc_##fn_name) = \
926 _nwrap_load_lib_function(lib, #fn_name); \
929 /* INTERNAL HELPER FUNCTIONS */
930 static void nwrap_lines_unload(struct nwrap_cache *const nwrap)
934 nwrap_vector_foreach(item, nwrap->lines, p) {
935 /* Maybe some vectors were merged ... */
938 SAFE_FREE(nwrap->lines.items);
939 ZERO_STRUCTP(&nwrap->lines);
945 * Functions expeciall from libc need to be loaded individually, you can't load
946 * all at once or gdb will segfault at startup. The same applies to valgrind and
947 * has probably something todo with with the linker.
948 * So we need load each function at the point it is called the first time.
950 static struct passwd *libc_getpwnam(const char *name)
952 nwrap_load_lib_function(NWRAP_LIBC, getpwnam);
954 return nwrap_main_global->libc->fns->_libc_getpwnam(name);
957 #ifdef HAVE_GETPWNAM_R
958 static int libc_getpwnam_r(const char *name,
962 struct passwd **result)
964 #ifdef HAVE___POSIX_GETPWNAM_R
965 if (nwrap_main_global->libc->fns->_libc_getpwnam_r == NULL) {
966 *(void **) (&nwrap_main_global->libc->fns->_libc_getpwnam_r) =
967 _nwrap_load_lib_function(NWRAP_LIBC, "__posix_getpwnam_r");
970 nwrap_load_lib_function(NWRAP_LIBC, getpwnam_r);
973 return nwrap_main_global->libc->fns->_libc_getpwnam_r(name,
981 static struct passwd *libc_getpwuid(uid_t uid)
983 nwrap_load_lib_function(NWRAP_LIBC, getpwuid);
985 return nwrap_main_global->libc->fns->_libc_getpwuid(uid);
988 #ifdef HAVE_GETPWUID_R
989 static int libc_getpwuid_r(uid_t uid,
993 struct passwd **result)
995 #ifdef HAVE___POSIX_GETPWUID_R
996 if (nwrap_main_global->libc->fns->_libc_getpwuid_r == NULL) {
997 *(void **) (&nwrap_main_global->libc->fns->_libc_getpwuid_r) =
998 _nwrap_load_lib_function(NWRAP_LIBC, "__posix_getpwuid_r");
1001 nwrap_load_lib_function(NWRAP_LIBC, getpwuid_r);
1004 return nwrap_main_global->libc->fns->_libc_getpwuid_r(uid,
1012 static inline void str_tolower(char *dst, char *src)
1014 register char *src_tmp = src;
1015 register char *dst_tmp = dst;
1017 while (*src_tmp != '\0') {
1018 *dst_tmp = tolower(*src_tmp);
1024 static bool str_tolower_copy(char **dst_name, const char *const src_name)
1028 if ((dst_name == NULL) || (src_name == NULL)) {
1032 h_name_lower = strdup(src_name);
1033 if (h_name_lower == NULL) {
1034 NWRAP_LOG(NWRAP_LOG_DEBUG, "Out of memory while strdup");
1038 str_tolower(h_name_lower, h_name_lower);
1039 *dst_name = h_name_lower;
1043 static void libc_setpwent(void)
1045 nwrap_load_lib_function(NWRAP_LIBC, setpwent);
1047 nwrap_main_global->libc->fns->_libc_setpwent();
1050 static struct passwd *libc_getpwent(void)
1052 nwrap_load_lib_function(NWRAP_LIBC, getpwent);
1054 return nwrap_main_global->libc->fns->_libc_getpwent();
1057 #ifdef HAVE_SOLARIS_GETPWENT_R
1058 static struct passwd *libc_getpwent_r(struct passwd *pwdst,
1062 nwrap_load_lib_function(NWRAP_LIBC, getpwent_r);
1064 return nwrap_main_global->libc->fns->_libc_getpwent_r(pwdst,
1068 #else /* HAVE_SOLARIS_GETPWENT_R */
1069 static int libc_getpwent_r(struct passwd *pwdst,
1072 struct passwd **pwdstp)
1074 nwrap_load_lib_function(NWRAP_LIBC, getpwent_r);
1076 return nwrap_main_global->libc->fns->_libc_getpwent_r(pwdst,
1081 #endif /* HAVE_SOLARIS_GETPWENT_R */
1083 static void libc_endpwent(void)
1085 nwrap_load_lib_function(NWRAP_LIBC, endpwent);
1087 nwrap_main_global->libc->fns->_libc_endpwent();
1090 static int libc_initgroups(const char *user, gid_t gid)
1092 nwrap_load_lib_function(NWRAP_LIBC, initgroups);
1094 return nwrap_main_global->libc->fns->_libc_initgroups(user, gid);
1097 static struct group *libc_getgrnam(const char *name)
1099 nwrap_load_lib_function(NWRAP_LIBC, getgrnam);
1101 return nwrap_main_global->libc->fns->_libc_getgrnam(name);
1104 #ifdef HAVE_GETGRNAM_R
1105 static int libc_getgrnam_r(const char *name,
1109 struct group **result)
1111 #ifdef HAVE___POSIX_GETGRNAM_R
1112 if (nwrap_main_global->libc->fns->_libc_getgrnam_r == NULL) {
1113 *(void **) (&nwrap_main_global->libc->fns->_libc_getgrnam_r) =
1114 _nwrap_load_lib_function(NWRAP_LIBC, "__posix_getgrnam_r");
1117 nwrap_load_lib_function(NWRAP_LIBC, getgrnam_r);
1120 return nwrap_main_global->libc->fns->_libc_getgrnam_r(name,
1128 static struct group *libc_getgrgid(gid_t gid)
1130 nwrap_load_lib_function(NWRAP_LIBC, getgrgid);
1132 return nwrap_main_global->libc->fns->_libc_getgrgid(gid);
1135 #ifdef HAVE_GETGRGID_R
1136 static int libc_getgrgid_r(gid_t gid,
1140 struct group **result)
1142 #ifdef HAVE___POSIX_GETGRGID_R
1143 if (nwrap_main_global->libc->fns->_libc_getgrgid_r == NULL) {
1144 *(void **) (&nwrap_main_global->libc->fns->_libc_getgrgid_r) =
1145 _nwrap_load_lib_function(NWRAP_LIBC, "__posix_getgrgid_r");
1148 nwrap_load_lib_function(NWRAP_LIBC, getgrgid_r);
1151 return nwrap_main_global->libc->fns->_libc_getgrgid_r(gid,
1159 static void libc_setgrent(void)
1161 nwrap_load_lib_function(NWRAP_LIBC, setgrent);
1163 nwrap_main_global->libc->fns->_libc_setgrent();
1166 static struct group *libc_getgrent(void)
1168 nwrap_load_lib_function(NWRAP_LIBC, getgrent);
1170 return nwrap_main_global->libc->fns->_libc_getgrent();
1173 #ifdef HAVE_GETGRENT_R
1174 #ifdef HAVE_SOLARIS_GETGRENT_R
1175 static struct group *libc_getgrent_r(struct group *group,
1179 nwrap_load_lib_function(NWRAP_LIBC, getgrent_r);
1181 return nwrap_main_global->libc->fns->_libc_getgrent_r(group,
1185 #else /* !HAVE_SOLARIS_GETGRENT_R */
1186 static int libc_getgrent_r(struct group *group,
1189 struct group **result)
1191 nwrap_load_lib_function(NWRAP_LIBC, getgrent_r);
1193 return nwrap_main_global->libc->fns->_libc_getgrent_r(group,
1198 #endif /* HAVE_SOLARIS_GETGRENT_R */
1199 #endif /* HAVE_GETGRENT_R */
1201 static void libc_endgrent(void)
1203 nwrap_load_lib_function(NWRAP_LIBC, endgrent);
1205 nwrap_main_global->libc->fns->_libc_endgrent();
1208 #ifdef HAVE_GETGROUPLIST
1209 static int libc_getgrouplist(const char *user,
1214 nwrap_load_lib_function(NWRAP_LIBC, getgrouplist);
1216 return nwrap_main_global->libc->fns->_libc_getgrouplist(user,
1223 static void libc_sethostent(int stayopen)
1225 nwrap_load_lib_function(NWRAP_LIBNSL, sethostent);
1227 nwrap_main_global->libc->fns->_libc_sethostent(stayopen);
1230 static struct hostent *libc_gethostent(void)
1232 nwrap_load_lib_function(NWRAP_LIBNSL, gethostent);
1234 return nwrap_main_global->libc->fns->_libc_gethostent();
1237 static void libc_endhostent(void)
1239 nwrap_load_lib_function(NWRAP_LIBNSL, endhostent);
1241 nwrap_main_global->libc->fns->_libc_endhostent();
1244 static struct hostent *libc_gethostbyname(const char *name)
1246 nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyname);
1248 return nwrap_main_global->libc->fns->_libc_gethostbyname(name);
1251 #ifdef HAVE_GETHOSTBYNAME2 /* GNU extension */
1252 static struct hostent *libc_gethostbyname2(const char *name, int af)
1254 nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyname2);
1256 return nwrap_main_global->libc->fns->_libc_gethostbyname2(name, af);
1260 static struct hostent *libc_gethostbyaddr(const void *addr,
1264 nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyaddr);
1266 return nwrap_main_global->libc->fns->_libc_gethostbyaddr(addr,
1271 static int libc_gethostname(char *name, size_t len)
1273 nwrap_load_lib_function(NWRAP_LIBNSL, gethostname);
1275 return nwrap_main_global->libc->fns->_libc_gethostname(name, len);
1278 #ifdef HAVE_GETHOSTBYNAME_R
1279 static int libc_gethostbyname_r(const char *name,
1280 struct hostent *ret,
1283 struct hostent **result,
1286 nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyname_r);
1288 return nwrap_main_global->libc->fns->_libc_gethostbyname_r(name,
1297 #ifdef HAVE_GETHOSTBYADDR_R
1298 static int libc_gethostbyaddr_r(const void *addr,
1301 struct hostent *ret,
1304 struct hostent **result,
1307 nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyaddr_r);
1309 return nwrap_main_global->libc->fns->_libc_gethostbyaddr_r(addr,
1320 static int libc_getaddrinfo(const char *node,
1321 const char *service,
1322 const struct addrinfo *hints,
1323 struct addrinfo **res)
1325 nwrap_load_lib_function(NWRAP_LIBSOCKET, getaddrinfo);
1327 return nwrap_main_global->libc->fns->_libc_getaddrinfo(node,
1333 static int libc_getnameinfo(const struct sockaddr *sa,
1341 nwrap_load_lib_function(NWRAP_LIBSOCKET, getnameinfo);
1343 return nwrap_main_global->libc->fns->_libc_getnameinfo(sa,
1352 /*********************************************************
1353 * NWRAP NSS MODULE LOADER FUNCTIONS
1354 *********************************************************/
1356 static void *nwrap_load_module_fn(struct nwrap_backend *b,
1357 const char *fn_name)
1362 if (!b->so_handle) {
1363 NWRAP_LOG(NWRAP_LOG_ERROR, "No handle");
1367 if (asprintf(&s, "_nss_%s_%s", b->name, fn_name) == -1) {
1368 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
1372 res = dlsym(b->so_handle, s);
1374 NWRAP_LOG(NWRAP_LOG_ERROR,
1375 "Cannot find function %s in %s",
1382 static struct nwrap_module_nss_fns *nwrap_load_module_fns(struct nwrap_backend *b)
1384 struct nwrap_module_nss_fns *fns;
1386 if (!b->so_handle) {
1390 fns = (struct nwrap_module_nss_fns *)malloc(sizeof(struct nwrap_module_nss_fns));
1395 *(void **)(&fns->_nss_getpwnam_r) =
1396 nwrap_load_module_fn(b, "getpwnam_r");
1397 *(void **)(&fns->_nss_getpwuid_r) =
1398 nwrap_load_module_fn(b, "getpwuid_r");
1399 *(void **)(&fns->_nss_setpwent) =
1400 nwrap_load_module_fn(b, "setpwent");
1401 *(void **)(&fns->_nss_getpwent_r) =
1402 nwrap_load_module_fn(b, "getpwent_r");
1403 *(void **)(&fns->_nss_endpwent) =
1404 nwrap_load_module_fn(b, "endpwent");
1405 *(void **)(&fns->_nss_initgroups) =
1406 nwrap_load_module_fn(b, "initgroups_dyn");
1407 *(void **)(&fns->_nss_getgrnam_r) =
1408 nwrap_load_module_fn(b, "getgrnam_r");
1409 *(void **)(&fns->_nss_getgrgid_r)=
1410 nwrap_load_module_fn(b, "getgrgid_r");
1411 *(void **)(&fns->_nss_setgrent) =
1412 nwrap_load_module_fn(b, "setgrent");
1413 *(void **)(&fns->_nss_getgrent_r) =
1414 nwrap_load_module_fn(b, "getgrent_r");
1415 *(void **)(&fns->_nss_endgrent) =
1416 nwrap_load_module_fn(b, "endgrent");
1421 static void *nwrap_load_module(const char *so_path)
1425 if (!so_path || !strlen(so_path)) {
1429 h = dlopen(so_path, RTLD_LAZY);
1431 NWRAP_LOG(NWRAP_LOG_ERROR,
1432 "Cannot open shared library %s",
1440 static bool nwrap_module_init(const char *name,
1441 struct nwrap_ops *ops,
1442 const char *so_path,
1444 struct nwrap_backend **backends)
1446 struct nwrap_backend *b;
1448 *backends = (struct nwrap_backend *)realloc(*backends,
1449 sizeof(struct nwrap_backend) * ((*num_backends) + 1));
1451 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
1455 b = &((*backends)[*num_backends]);
1459 b->so_path = so_path;
1461 if (so_path != NULL) {
1462 b->so_handle = nwrap_load_module(so_path);
1463 b->fns = nwrap_load_module_fns(b);
1464 if (b->fns == NULL) {
1468 b->so_handle = NULL;
1477 static void nwrap_libc_init(struct nwrap_main *r)
1479 r->libc = malloc(sizeof(struct nwrap_libc));
1480 if (r->libc == NULL) {
1481 printf("Failed to allocate memory for libc");
1484 ZERO_STRUCTP(r->libc);
1486 r->libc->fns = malloc(sizeof(struct nwrap_libc_fns));
1487 if (r->libc->fns == NULL) {
1488 printf("Failed to allocate memory for libc functions");
1491 ZERO_STRUCTP(r->libc->fns);
1494 static void nwrap_backend_init(struct nwrap_main *r)
1496 const char *module_so_path = getenv("NSS_WRAPPER_MODULE_SO_PATH");
1497 const char *module_fn_name = getenv("NSS_WRAPPER_MODULE_FN_PREFIX");
1499 r->num_backends = 0;
1502 if (!nwrap_module_init("files", &nwrap_files_ops, NULL,
1505 NWRAP_LOG(NWRAP_LOG_ERROR,
1506 "Failed to initialize 'files' backend");
1510 if (module_so_path != NULL &&
1511 module_so_path[0] != '\0' &&
1512 module_fn_name != NULL &&
1513 module_fn_name[0] != '\0') {
1514 if (!nwrap_module_init(module_fn_name,
1519 NWRAP_LOG(NWRAP_LOG_ERROR,
1520 "Failed to initialize '%s' backend",
1527 static void nwrap_init(void)
1531 size_t max_hostents_tmp;
1533 NWRAP_LOCK(nwrap_initialized);
1534 if (nwrap_initialized) {
1535 NWRAP_UNLOCK(nwrap_initialized);
1540 * Still holding nwrap_initialized lock here.
1541 * We don't use NWRAP_(UN)LOCK_ALL macros here because we
1542 * want to avoid overhead when other threads do their job.
1544 NWRAP_LOCK(nwrap_global);
1545 NWRAP_LOCK(nwrap_gr_global);
1546 NWRAP_LOCK(nwrap_he_global);
1547 NWRAP_LOCK(nwrap_pw_global);
1548 NWRAP_LOCK(nwrap_sp_global);
1550 nwrap_initialized = true;
1552 /* Initialize pthread_atfork handlers */
1553 pthread_atfork(&nwrap_thread_prepare, &nwrap_thread_parent,
1554 &nwrap_thread_child);
1556 env = getenv("NSS_WRAPPER_MAX_HOSTENTS");
1558 max_hostents_tmp = (size_t)strtol(env, &endptr, 10);
1559 if (((env != '\0') && (endptr == '\0')) ||
1560 (max_hostents_tmp == 0)) {
1561 NWRAP_LOG(NWRAP_LOG_DEBUG,
1562 "Error parsing NSS_WRAPPER_MAX_HOSTENTS "
1563 "value or value is too small. "
1564 "Using default value: %lu.",
1567 max_hostents = max_hostents_tmp;
1570 /* Initialize hash table */
1571 NWRAP_LOG(NWRAP_LOG_DEBUG,
1572 "Initializing hash table of size %lu items.", max_hostents);
1573 if (hcreate(max_hostents) == 0) {
1574 NWRAP_LOG(NWRAP_LOG_ERROR,
1575 "Failed to initialize hash table");
1579 nwrap_main_global = &__nwrap_main_global;
1581 nwrap_libc_init(nwrap_main_global);
1583 nwrap_backend_init(nwrap_main_global);
1586 nwrap_pw_global.cache = &__nwrap_cache_pw;
1588 nwrap_pw_global.cache->path = getenv("NSS_WRAPPER_PASSWD");
1589 nwrap_pw_global.cache->fp = NULL;
1590 nwrap_pw_global.cache->fd = -1;
1591 nwrap_pw_global.cache->private_data = &nwrap_pw_global;
1592 nwrap_pw_global.cache->parse_line = nwrap_pw_parse_line;
1593 nwrap_pw_global.cache->unload = nwrap_pw_unload;
1596 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
1597 nwrap_sp_global.cache = &__nwrap_cache_sp;
1599 nwrap_sp_global.cache->path = getenv("NSS_WRAPPER_SHADOW");
1600 nwrap_sp_global.cache->fp = NULL;
1601 nwrap_sp_global.cache->fd = -1;
1602 nwrap_sp_global.cache->private_data = &nwrap_sp_global;
1603 nwrap_sp_global.cache->parse_line = nwrap_sp_parse_line;
1604 nwrap_sp_global.cache->unload = nwrap_sp_unload;
1605 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
1608 nwrap_gr_global.cache = &__nwrap_cache_gr;
1610 nwrap_gr_global.cache->path = getenv("NSS_WRAPPER_GROUP");
1611 nwrap_gr_global.cache->fp = NULL;
1612 nwrap_gr_global.cache->fd = -1;
1613 nwrap_gr_global.cache->private_data = &nwrap_gr_global;
1614 nwrap_gr_global.cache->parse_line = nwrap_gr_parse_line;
1615 nwrap_gr_global.cache->unload = nwrap_gr_unload;
1618 nwrap_he_global.cache = &__nwrap_cache_he;
1620 nwrap_he_global.cache->path = getenv("NSS_WRAPPER_HOSTS");
1621 nwrap_he_global.cache->fp = NULL;
1622 nwrap_he_global.cache->fd = -1;
1623 nwrap_he_global.cache->private_data = &nwrap_he_global;
1624 nwrap_he_global.cache->parse_line = nwrap_he_parse_line;
1625 nwrap_he_global.cache->unload = nwrap_he_unload;
1628 /* We hold all locks here so we can use NWRAP_UNLOCK_ALL. */
1632 bool nss_wrapper_enabled(void)
1636 if (nwrap_pw_global.cache->path == NULL ||
1637 nwrap_pw_global.cache->path[0] == '\0') {
1640 if (nwrap_gr_global.cache->path == NULL ||
1641 nwrap_gr_global.cache->path[0] == '\0') {
1648 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
1649 bool nss_wrapper_shadow_enabled(void)
1653 if (nwrap_sp_global.cache->path == NULL ||
1654 nwrap_sp_global.cache->path[0] == '\0') {
1660 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
1662 bool nss_wrapper_hosts_enabled(void)
1666 if (nwrap_he_global.cache->path == NULL ||
1667 nwrap_he_global.cache->path[0] == '\0') {
1674 static bool nwrap_hostname_enabled(void)
1678 if (getenv("NSS_WRAPPER_HOSTNAME") == NULL) {
1685 static bool nwrap_parse_file(struct nwrap_cache *nwrap)
1689 /* Unused but getline needs it */
1693 if (nwrap->st.st_size == 0) {
1694 NWRAP_LOG(NWRAP_LOG_DEBUG, "size == 0");
1698 /* Support for 32-bit system I guess */
1699 if (nwrap->st.st_size > INT32_MAX) {
1700 NWRAP_LOG(NWRAP_LOG_ERROR,
1701 "Size[%u] larger than INT32_MAX",
1702 (unsigned)nwrap->st.st_size);
1709 n = getline(&line, &len, nwrap->fp);
1712 if (feof(nwrap->fp)) {
1716 NWRAP_LOG(NWRAP_LOG_ERROR,
1717 "Unable to read line from file: %s",
1722 if (line[n - 1] == '\n') {
1726 if (line[0] == '\0') {
1731 ok = nwrap->parse_line(nwrap, line);
1733 NWRAP_LOG(NWRAP_LOG_ERROR,
1734 "Unable to parse line file: %s",
1740 /* Line is parsed without issues so add it to list */
1741 ok = nwrap_vector_add_item(&(nwrap->lines), (void *const) line);
1743 NWRAP_LOG(NWRAP_LOG_ERROR,
1744 "Unable to add line to vector");
1748 /* This forces getline to allocate new memory for line. */
1750 } while (!feof(nwrap->fp));
1755 static void nwrap_files_cache_unload(struct nwrap_cache *nwrap)
1757 nwrap->unload(nwrap);
1759 nwrap_lines_unload(nwrap);
1762 static void nwrap_files_cache_reload(struct nwrap_cache *nwrap)
1767 bool retried = false;
1769 assert(nwrap != NULL);
1772 if (nwrap->fd < 0) {
1773 nwrap->fp = fopen(nwrap->path, "re");
1774 if (nwrap->fp == NULL) {
1776 NWRAP_LOG(NWRAP_LOG_ERROR,
1777 "Unable to open '%s' readonly %d:%s",
1778 nwrap->path, nwrap->fd,
1783 nwrap->fd = fileno(nwrap->fp);
1784 NWRAP_LOG(NWRAP_LOG_DEBUG, "Open '%s'", nwrap->path);
1787 ret = fstat(nwrap->fd, &st);
1789 NWRAP_LOG(NWRAP_LOG_ERROR,
1790 "fstat(%s) - %d:%s",
1800 if (retried == false && st.st_nlink == 0) {
1801 /* maybe someone has replaced the file... */
1802 NWRAP_LOG(NWRAP_LOG_TRACE,
1803 "st_nlink == 0, reopen %s",
1806 memset(&nwrap->st, 0, sizeof(nwrap->st));
1813 if (st.st_mtime == nwrap->st.st_mtime) {
1814 NWRAP_LOG(NWRAP_LOG_TRACE,
1815 "st_mtime[%u] hasn't changed, skip reload",
1816 (unsigned)st.st_mtime);
1820 NWRAP_LOG(NWRAP_LOG_TRACE,
1821 "st_mtime has changed [%u] => [%u], start reload",
1822 (unsigned)st.st_mtime,
1823 (unsigned)nwrap->st.st_mtime);
1827 nwrap_files_cache_unload(nwrap);
1829 ok = nwrap_parse_file(nwrap);
1831 NWRAP_LOG(NWRAP_LOG_ERROR, "Failed to reload %s", nwrap->path);
1832 nwrap_files_cache_unload(nwrap);
1835 NWRAP_LOG(NWRAP_LOG_TRACE, "Reloaded %s", nwrap->path);
1839 * the caller has to call nwrap_unload() on failure
1841 static bool nwrap_pw_parse_line(struct nwrap_cache *nwrap, char *line)
1843 struct nwrap_pw *nwrap_pw;
1850 nwrap_pw = (struct nwrap_pw *)nwrap->private_data;
1852 list_size = sizeof(*nwrap_pw->list) * (nwrap_pw->num+1);
1853 pw = (struct passwd *)realloc(nwrap_pw->list, list_size);
1855 NWRAP_LOG(NWRAP_LOG_ERROR,
1856 "realloc(%u) failed",
1857 (unsigned)list_size);
1860 nwrap_pw->list = pw;
1862 pw = &nwrap_pw->list[nwrap_pw->num];
1869 NWRAP_LOG(NWRAP_LOG_ERROR,
1870 "Invalid line[%s]: '%s'",
1880 NWRAP_LOG(NWRAP_LOG_TRACE, "name[%s]\n", pw->pw_name);
1885 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
1893 NWRAP_LOG(NWRAP_LOG_TRACE, "password[%s]\n", pw->pw_passwd);
1898 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
1904 pw->pw_uid = (uid_t)strtoul(c, &e, 10);
1906 NWRAP_LOG(NWRAP_LOG_ERROR,
1907 "Invalid line[%s]: '%s' - %s",
1908 line, c, strerror(errno));
1912 NWRAP_LOG(NWRAP_LOG_ERROR,
1913 "Invalid line[%s]: '%s' - %s",
1914 line, c, strerror(errno));
1918 NWRAP_LOG(NWRAP_LOG_ERROR,
1919 "Invalid line[%s]: '%s' - %s",
1920 line, c, strerror(errno));
1925 NWRAP_LOG(NWRAP_LOG_TRACE, "uid[%u]", pw->pw_uid);
1930 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
1936 pw->pw_gid = (gid_t)strtoul(c, &e, 10);
1938 NWRAP_LOG(NWRAP_LOG_ERROR,
1939 "Invalid line[%s]: '%s' - %s",
1940 line, c, strerror(errno));
1944 NWRAP_LOG(NWRAP_LOG_ERROR,
1945 "Invalid line[%s]: '%s' - %s",
1946 line, c, strerror(errno));
1950 NWRAP_LOG(NWRAP_LOG_ERROR,
1951 "Invalid line[%s]: '%s' - %s",
1952 line, c, strerror(errno));
1957 NWRAP_LOG(NWRAP_LOG_TRACE, "gid[%u]\n", pw->pw_gid);
1962 NWRAP_LOG(NWRAP_LOG_ERROR, "invalid line[%s]: '%s'", line, c);
1970 NWRAP_LOG(NWRAP_LOG_TRACE, "gecos[%s]", pw->pw_gecos);
1975 NWRAP_LOG(NWRAP_LOG_ERROR, "'%s'", c);
1983 NWRAP_LOG(NWRAP_LOG_TRACE, "dir[%s]", pw->pw_dir);
1987 NWRAP_LOG(NWRAP_LOG_TRACE, "shell[%s]", pw->pw_shell);
1989 NWRAP_LOG(NWRAP_LOG_DEBUG,
1990 "Added user[%s:%s:%u:%u:%s:%s:%s]",
1991 pw->pw_name, pw->pw_passwd,
1992 pw->pw_uid, pw->pw_gid,
1993 pw->pw_gecos, pw->pw_dir, pw->pw_shell);
1999 static void nwrap_pw_unload(struct nwrap_cache *nwrap)
2001 struct nwrap_pw *nwrap_pw;
2002 nwrap_pw = (struct nwrap_pw *)nwrap->private_data;
2004 SAFE_FREE(nwrap_pw->list);
2009 static int nwrap_pw_copy_r(const struct passwd *src, struct passwd *dst,
2010 char *buf, size_t buflen, struct passwd **dstp)
2016 first = src->pw_name;
2018 last = src->pw_shell;
2019 while (*last) last++;
2021 ofs = PTR_DIFF(last + 1, first);
2023 if (ofs > (off_t) buflen) {
2027 memcpy(buf, first, ofs);
2029 ofs = PTR_DIFF(src->pw_name, first);
2030 dst->pw_name = buf + ofs;
2031 ofs = PTR_DIFF(src->pw_passwd, first);
2032 dst->pw_passwd = buf + ofs;
2033 dst->pw_uid = src->pw_uid;
2034 dst->pw_gid = src->pw_gid;
2035 ofs = PTR_DIFF(src->pw_gecos, first);
2036 dst->pw_gecos = buf + ofs;
2037 ofs = PTR_DIFF(src->pw_dir, first);
2038 dst->pw_dir = buf + ofs;
2039 ofs = PTR_DIFF(src->pw_shell, first);
2040 dst->pw_shell = buf + ofs;
2049 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
2050 static bool nwrap_sp_parse_line(struct nwrap_cache *nwrap, char *line)
2052 struct nwrap_sp *nwrap_sp;
2059 nwrap_sp = (struct nwrap_sp *)nwrap->private_data;
2061 list_size = sizeof(*nwrap_sp->list) * (nwrap_sp->num+1);
2062 sp = (struct spwd *)realloc(nwrap_sp->list, list_size);
2064 NWRAP_LOG(NWRAP_LOG_ERROR,
2065 "realloc(%u) failed",
2066 (unsigned)list_size);
2069 nwrap_sp->list = sp;
2071 sp = &nwrap_sp->list[nwrap_sp->num];
2078 NWRAP_LOG(NWRAP_LOG_ERROR,
2079 "name -- Invalid line[%s]: '%s'",
2089 NWRAP_LOG(NWRAP_LOG_TRACE, "name[%s]\n", sp->sp_namp);
2094 NWRAP_LOG(NWRAP_LOG_ERROR,
2095 "pwd -- Invalid line[%s]: '%s'",
2112 NWRAP_LOG(NWRAP_LOG_ERROR,
2113 "lstchg -- Invalid line[%s]: '%s'",
2120 sp->sp_lstchg = strtol(c, &e, 10);
2122 NWRAP_LOG(NWRAP_LOG_ERROR,
2123 "lstchg -- Invalid line[%s]: '%s' - %s",
2124 line, c, strerror(errno));
2128 NWRAP_LOG(NWRAP_LOG_ERROR,
2129 "lstchg -- Invalid line[%s]: '%s' - %s",
2130 line, c, strerror(errno));
2134 NWRAP_LOG(NWRAP_LOG_ERROR,
2135 "lstchg -- Invalid line[%s]: '%s' - %s",
2136 line, c, strerror(errno));
2149 NWRAP_LOG(NWRAP_LOG_ERROR,
2150 "min -- Invalid line[%s]: '%s'",
2157 sp->sp_min = strtol(c, &e, 10);
2159 NWRAP_LOG(NWRAP_LOG_ERROR,
2160 "min -- Invalid line[%s]: '%s' - %s",
2161 line, c, strerror(errno));
2165 NWRAP_LOG(NWRAP_LOG_ERROR,
2166 "min -- Invalid line[%s]: '%s' - %s",
2167 line, c, strerror(errno));
2171 NWRAP_LOG(NWRAP_LOG_ERROR,
2172 "min -- Invalid line[%s]: '%s' - %s",
2173 line, c, strerror(errno));
2186 NWRAP_LOG(NWRAP_LOG_ERROR,
2187 "max -- Invalid line[%s]: '%s'",
2194 sp->sp_max = strtol(c, &e, 10);
2196 NWRAP_LOG(NWRAP_LOG_ERROR,
2197 "max -- Invalid line[%s]: '%s' - %s",
2198 line, c, strerror(errno));
2202 NWRAP_LOG(NWRAP_LOG_ERROR,
2203 "max -- Invalid line[%s]: '%s' - %s",
2204 line, c, strerror(errno));
2208 NWRAP_LOG(NWRAP_LOG_ERROR,
2209 "max -- Invalid line[%s]: '%s' - %s",
2210 line, c, strerror(errno));
2223 NWRAP_LOG(NWRAP_LOG_ERROR,
2224 "warn -- Invalid line[%s]: '%s'",
2231 sp->sp_warn = strtol(c, &e, 10);
2233 NWRAP_LOG(NWRAP_LOG_ERROR,
2234 "warn -- Invalid line[%s]: '%s' - %s",
2235 line, c, strerror(errno));
2239 NWRAP_LOG(NWRAP_LOG_ERROR,
2240 "warn -- Invalid line[%s]: '%s' - %s",
2241 line, c, strerror(errno));
2245 NWRAP_LOG(NWRAP_LOG_ERROR,
2246 "warn -- Invalid line[%s]: '%s' - %s",
2247 line, c, strerror(errno));
2260 NWRAP_LOG(NWRAP_LOG_ERROR,
2261 "inact -- Invalid line[%s]: '%s'",
2268 sp->sp_inact = strtol(c, &e, 10);
2270 NWRAP_LOG(NWRAP_LOG_ERROR,
2271 "inact -- Invalid line[%s]: '%s' - %s",
2272 line, c, strerror(errno));
2276 NWRAP_LOG(NWRAP_LOG_ERROR,
2277 "inact -- Invalid line[%s]: '%s' - %s",
2278 line, c, strerror(errno));
2282 NWRAP_LOG(NWRAP_LOG_ERROR,
2283 "inact -- Invalid line[%s]: '%s' - %s",
2284 line, c, strerror(errno));
2297 NWRAP_LOG(NWRAP_LOG_ERROR,
2298 "expire -- Invalid line[%s]: '%s'",
2305 sp->sp_expire = strtol(c, &e, 10);
2307 NWRAP_LOG(NWRAP_LOG_ERROR,
2308 "expire -- Invalid line[%s]: '%s' - %s",
2309 line, c, strerror(errno));
2313 NWRAP_LOG(NWRAP_LOG_ERROR,
2314 "expire -- Invalid line[%s]: '%s' - %s",
2315 line, c, strerror(errno));
2319 NWRAP_LOG(NWRAP_LOG_ERROR,
2320 "expire -- Invalid line[%s]: '%s' - %s",
2321 line, c, strerror(errno));
2331 static void nwrap_sp_unload(struct nwrap_cache *nwrap)
2333 struct nwrap_sp *nwrap_sp;
2334 nwrap_sp = (struct nwrap_sp *)nwrap->private_data;
2336 SAFE_FREE(nwrap_sp->list);
2340 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
2343 * the caller has to call nwrap_unload() on failure
2345 static bool nwrap_gr_parse_line(struct nwrap_cache *nwrap, char *line)
2347 struct nwrap_gr *nwrap_gr;
2355 nwrap_gr = (struct nwrap_gr *)nwrap->private_data;
2357 list_size = sizeof(*nwrap_gr->list) * (nwrap_gr->num+1);
2358 gr = (struct group *)realloc(nwrap_gr->list, list_size);
2360 NWRAP_LOG(NWRAP_LOG_ERROR, "realloc failed");
2363 nwrap_gr->list = gr;
2365 gr = &nwrap_gr->list[nwrap_gr->num];
2372 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
2380 NWRAP_LOG(NWRAP_LOG_TRACE, "name[%s]", gr->gr_name);
2385 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
2393 NWRAP_LOG(NWRAP_LOG_TRACE, "password[%s]", gr->gr_passwd);
2398 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
2404 gr->gr_gid = (gid_t)strtoul(c, &e, 10);
2406 NWRAP_LOG(NWRAP_LOG_ERROR,
2407 "Invalid line[%s]: '%s' - %s",
2408 line, c, strerror(errno));
2412 NWRAP_LOG(NWRAP_LOG_ERROR,
2413 "Invalid line[%s]: '%s' - %s",
2414 line, c, strerror(errno));
2418 NWRAP_LOG(NWRAP_LOG_ERROR,
2419 "Invalid line[%s]: '%s' - %s",
2420 line, c, strerror(errno));
2425 NWRAP_LOG(NWRAP_LOG_TRACE, "gid[%u]", gr->gr_gid);
2428 gr->gr_mem = (char **)malloc(sizeof(char *));
2430 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
2433 gr->gr_mem[0] = NULL;
2435 for(nummem=0; p; nummem++) {
2445 if (strlen(c) == 0) {
2449 m_size = sizeof(char *) * (nummem+2);
2450 m = (char **)realloc(gr->gr_mem, m_size);
2452 NWRAP_LOG(NWRAP_LOG_ERROR,
2453 "realloc(%zd) failed",
2458 gr->gr_mem[nummem] = c;
2459 gr->gr_mem[nummem+1] = NULL;
2461 NWRAP_LOG(NWRAP_LOG_TRACE,
2463 nummem, gr->gr_mem[nummem]);
2466 NWRAP_LOG(NWRAP_LOG_DEBUG,
2467 "Added group[%s:%s:%u:] with %u members",
2468 gr->gr_name, gr->gr_passwd, gr->gr_gid, nummem);
2474 static void nwrap_gr_unload(struct nwrap_cache *nwrap)
2477 struct nwrap_gr *nwrap_gr;
2478 nwrap_gr = (struct nwrap_gr *)nwrap->private_data;
2480 if (nwrap_gr->list) {
2481 for (i=0; i < nwrap_gr->num; i++) {
2482 SAFE_FREE(nwrap_gr->list[i].gr_mem);
2484 SAFE_FREE(nwrap_gr->list);
2491 static int nwrap_gr_copy_r(const struct group *src, struct group *dst,
2492 char *buf, size_t buflen, struct group **dstp)
2502 first = src->gr_name;
2504 lastm = src->gr_mem;
2511 last = src->gr_passwd;
2513 while (*last) last++;
2515 ofsb = PTR_DIFF(last + 1, first);
2516 ofsm = PTR_DIFF(lastm + 1, src->gr_mem);
2518 if ((ofsb + ofsm) > (off_t) buflen) {
2522 memcpy(buf, first, ofsb);
2523 memcpy(buf + ofsb, src->gr_mem, ofsm);
2525 ofs = PTR_DIFF(src->gr_name, first);
2526 dst->gr_name = buf + ofs;
2527 ofs = PTR_DIFF(src->gr_passwd, first);
2528 dst->gr_passwd = buf + ofs;
2529 dst->gr_gid = src->gr_gid;
2531 dst->gr_mem = (char **)(buf + ofsb);
2532 for (i=0; src->gr_mem[i]; i++) {
2533 ofs = PTR_DIFF(src->gr_mem[i], first);
2534 dst->gr_mem[i] = buf + ofs;
2544 static bool nwrap_add_ai(char *const ip_addr, struct nwrap_entdata *const ed)
2552 p = hsearch(e, ENTER);
2554 NWRAP_LOG(NWRAP_LOG_DEBUG, "Hash table is full");
2562 static bool nwrap_add_hname_add_new(char *const h_name,
2563 struct nwrap_entdata *const ed)
2569 e.data = (void *)ed;
2573 p = hsearch(e, ENTER);
2575 NWRAP_LOG(NWRAP_LOG_DEBUG, "Hash table is full!");
2582 static void nwrap_add_hname_add_to_existing(struct nwrap_entdata *const ed,
2583 struct nwrap_entdata *const ed_dst)
2585 if (ed_dst->ed_tail != NULL) {
2586 ed_dst->ed_tail->ed_next = ed;
2587 if (ed_dst->ed_tail != ed) {
2588 ed_dst->ed_tail = ed;
2592 ed_dst->ed_tail = ed;
2596 static bool nwrap_add_hname_alias(char *const h_name_a,
2597 struct nwrap_entdata *const ed)
2603 assert(h_name_a != NULL);
2607 NWRAP_LOG(NWRAP_LOG_DEBUG, "Searching name: %s", e.key);
2608 p = hsearch(e, FIND);
2610 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s not found. Adding...", h_name_a);
2611 nwrap_add_hname_add_new(h_name_a, ed);
2613 struct nwrap_entdata *ed_dst = (struct nwrap_entdata *)p->data;
2615 assert(p->data != NULL);
2616 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s found. Add record to list.", h_name_a);
2617 nwrap_add_hname_add_to_existing(ed, ed_dst);
2623 static bool nwrap_add_hname(struct nwrap_entdata *const ed)
2625 char *const h_name = (char *const)(ed->ht.h_name);
2630 /* Maybe it's little bit late ... */
2632 assert(h_name != NULL);
2636 NWRAP_LOG(NWRAP_LOG_DEBUG, "Searching name: %s", e.key);
2637 p = hsearch(e, FIND);
2639 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s not found. Adding...", h_name);
2640 /* Just add alias and don't mess with metadata */
2641 nwrap_add_hname_add_new(h_name, ed);
2643 if (ed->ed_tail == NULL) {
2647 /* Element found. Add them to end of list */
2648 struct nwrap_entdata *ed_dst = (struct nwrap_entdata *)p->data;
2650 assert(p->data != NULL);
2651 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s found. Add record to list.", h_name);
2652 nwrap_add_hname_add_to_existing(ed, ed_dst);
2655 /* Return true when list of aliases is empty */
2656 if (ed->ht.h_aliases == NULL) {
2660 /* Itemize aliases */
2661 for (i = 0; ed->ht.h_aliases[i] != NULL; ++i) {
2664 h_name_alias = ed->ht.h_aliases[i];
2665 assert(h_name_alias != NULL);
2667 NWRAP_LOG(NWRAP_LOG_DEBUG, "Add alias: %s", h_name_alias);
2669 if (!nwrap_add_hname_alias(h_name_alias, ed)) {
2670 NWRAP_LOG(NWRAP_LOG_DEBUG,
2671 "Unable to add alias: %s", h_name_alias);
2678 static bool nwrap_he_parse_line(struct nwrap_cache *nwrap, char *line)
2680 struct nwrap_he *nwrap_he = (struct nwrap_he *)nwrap->private_data;
2681 bool do_aliases = true;
2682 ssize_t aliases_count = 0;
2689 struct nwrap_entdata *ed = (struct nwrap_entdata *)
2690 malloc(sizeof(struct nwrap_entdata));
2692 NWRAP_LOG(NWRAP_LOG_ERROR,
2693 "Unable to allocate memory for nwrap_entdata");
2704 /* Walk to first char */
2705 for (p = i; *p != '.' && *p != ':' && !isxdigit((int) *p); p++) {
2707 NWRAP_LOG(NWRAP_LOG_ERROR,
2708 "Invalid line[%s]: '%s'",
2715 for (i = p; !isspace((int)*p); p++) {
2717 NWRAP_LOG(NWRAP_LOG_ERROR,
2718 "Invalid line[%s]: '%s'",
2727 if (inet_pton(AF_INET, i, ed->addr.host_addr)) {
2728 ed->ht.h_addrtype = AF_INET;
2729 ed->ht.h_length = 4;
2731 } else if (inet_pton(AF_INET6, i, ed->addr.host_addr)) {
2732 ed->ht.h_addrtype = AF_INET6;
2733 ed->ht.h_length = 16;
2736 NWRAP_LOG(NWRAP_LOG_ERROR,
2737 "Invalid line[%s]: '%s'",
2745 nwrap_vector_add_item(&(ed->nwrap_addrdata),
2746 (void *const)ed->addr.host_addr);
2747 ed->ht.h_addr_list = nwrap_vector_head(&ed->nwrap_addrdata);
2755 /* Walk to first char */
2756 for (n = p; *p != '_' && !isalnum((int) *p); p++) {
2758 NWRAP_LOG(NWRAP_LOG_ERROR,
2759 "Invalid line[%s]: '%s'",
2767 for (n = p; !isspace((int)*p); p++) {
2776 /* Convert to lowercase. This operate on same memory region */
2780 /* glib's getent always dereferences he->h_aliases */
2781 ed->ht.h_aliases = malloc(sizeof(char *));
2782 if (ed->ht.h_aliases == NULL) {
2786 ed->ht.h_aliases[0] = NULL;
2791 while (do_aliases) {
2797 /* Walk to first char */
2798 for (a = p; *p != '_' && !isalnum((int) *p); p++) {
2804 /* Only trailing spaces are left */
2809 for (a = p; !isspace((int)*p); p++) {
2818 aliases = realloc(ed->ht.h_aliases, sizeof(char *) * (aliases_count + 2));
2819 if (aliases == NULL) {
2823 ed->ht.h_aliases = aliases;
2826 aliases[aliases_count] = a;
2827 aliases[aliases_count + 1] = NULL;
2832 nwrap_vector_add_item(&(nwrap_he->entdata), (void *const)ed);
2834 ed->aliases_count = aliases_count;
2835 /* Inventarize item */
2836 nwrap_add_hname(ed);
2837 nwrap_add_ai(ip, ed);
2843 static void nwrap_he_unload(struct nwrap_cache *nwrap)
2845 struct nwrap_he *nwrap_he =
2846 (struct nwrap_he *)nwrap->private_data;
2847 struct nwrap_entdata *ed;
2850 nwrap_vector_foreach (ed, nwrap_he->entdata, i)
2852 SAFE_FREE(ed->nwrap_addrdata.items);
2853 SAFE_FREE(ed->ht.h_aliases);
2856 SAFE_FREE(nwrap_he->entdata.items);
2857 nwrap_he->entdata.count = nwrap_he->entdata.capacity = 0;
2864 /* user functions */
2865 static struct passwd *nwrap_files_getpwnam(struct nwrap_backend *b,
2870 (void) b; /* unused */
2872 NWRAP_LOG(NWRAP_LOG_DEBUG, "Lookup user %s in files", name);
2874 nwrap_files_cache_reload(nwrap_pw_global.cache);
2876 for (i=0; i<nwrap_pw_global.num; i++) {
2877 if (strcmp(nwrap_pw_global.list[i].pw_name, name) == 0) {
2878 NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] found", name);
2879 return &nwrap_pw_global.list[i];
2881 NWRAP_LOG(NWRAP_LOG_DEBUG,
2882 "user[%s] does not match [%s]",
2884 nwrap_pw_global.list[i].pw_name);
2887 NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] not found\n", name);
2893 static int nwrap_files_getpwnam_r(struct nwrap_backend *b,
2894 const char *name, struct passwd *pwdst,
2895 char *buf, size_t buflen, struct passwd **pwdstp)
2899 pw = nwrap_files_getpwnam(b, name);
2907 return nwrap_pw_copy_r(pw, pwdst, buf, buflen, pwdstp);
2910 static struct passwd *nwrap_files_getpwuid(struct nwrap_backend *b,
2915 (void) b; /* unused */
2917 nwrap_files_cache_reload(nwrap_pw_global.cache);
2919 for (i=0; i<nwrap_pw_global.num; i++) {
2920 if (nwrap_pw_global.list[i].pw_uid == uid) {
2921 NWRAP_LOG(NWRAP_LOG_DEBUG, "uid[%u] found", uid);
2922 return &nwrap_pw_global.list[i];
2924 NWRAP_LOG(NWRAP_LOG_DEBUG,
2925 "uid[%u] does not match [%u]",
2927 nwrap_pw_global.list[i].pw_uid);
2930 NWRAP_LOG(NWRAP_LOG_DEBUG, "uid[%u] not found\n", uid);
2936 static int nwrap_files_getpwuid_r(struct nwrap_backend *b,
2937 uid_t uid, struct passwd *pwdst,
2938 char *buf, size_t buflen, struct passwd **pwdstp)
2942 pw = nwrap_files_getpwuid(b, uid);
2950 return nwrap_pw_copy_r(pw, pwdst, buf, buflen, pwdstp);
2953 /* user enum functions */
2954 static void nwrap_files_setpwent(struct nwrap_backend *b)
2956 (void) b; /* unused */
2958 nwrap_pw_global.idx = 0;
2961 static struct passwd *nwrap_files_getpwent(struct nwrap_backend *b)
2965 (void) b; /* unused */
2967 if (nwrap_pw_global.idx == 0) {
2968 nwrap_files_cache_reload(nwrap_pw_global.cache);
2971 if (nwrap_pw_global.idx >= nwrap_pw_global.num) {
2976 pw = &nwrap_pw_global.list[nwrap_pw_global.idx++];
2978 NWRAP_LOG(NWRAP_LOG_DEBUG,
2979 "return user[%s] uid[%u]",
2980 pw->pw_name, pw->pw_uid);
2985 static int nwrap_files_getpwent_r(struct nwrap_backend *b,
2986 struct passwd *pwdst, char *buf,
2987 size_t buflen, struct passwd **pwdstp)
2991 pw = nwrap_files_getpwent(b);
2999 return nwrap_pw_copy_r(pw, pwdst, buf, buflen, pwdstp);
3002 static void nwrap_files_endpwent(struct nwrap_backend *b)
3004 (void) b; /* unused */
3006 nwrap_pw_global.idx = 0;
3011 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
3013 #ifdef HAVE_SETSPENT
3014 static void nwrap_files_setspent(void)
3016 nwrap_sp_global.idx = 0;
3019 static struct spwd *nwrap_files_getspent(void)
3023 if (nwrap_sp_global.idx == 0) {
3024 nwrap_files_cache_reload(nwrap_sp_global.cache);
3027 if (nwrap_sp_global.idx >= nwrap_sp_global.num) {
3032 sp = &nwrap_sp_global.list[nwrap_sp_global.idx++];
3034 NWRAP_LOG(NWRAP_LOG_DEBUG,
3041 static void nwrap_files_endspent(void)
3043 nwrap_sp_global.idx = 0;
3045 #endif /* HAVE_SETSPENT */
3047 static struct spwd *nwrap_files_getspnam(const char *name)
3051 NWRAP_LOG(NWRAP_LOG_DEBUG, "Lookup user %s in files", name);
3053 nwrap_files_cache_reload(nwrap_sp_global.cache);
3055 for (i=0; i<nwrap_sp_global.num; i++) {
3056 if (strcmp(nwrap_sp_global.list[i].sp_namp, name) == 0) {
3057 NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] found", name);
3058 return &nwrap_sp_global.list[i];
3060 NWRAP_LOG(NWRAP_LOG_DEBUG,
3061 "user[%s] does not match [%s]",
3063 nwrap_sp_global.list[i].sp_namp);
3066 NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] not found\n", name);
3071 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
3073 /* misc functions */
3074 static int nwrap_files_initgroups(struct nwrap_backend *b,
3083 groups = (gid_t *)malloc(size * sizeof(gid_t));
3084 if (groups == NULL) {
3085 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
3091 nwrap_files_setgrent(b);
3092 while ((grp = nwrap_files_getgrent(b)) != NULL) {
3095 NWRAP_LOG(NWRAP_LOG_DEBUG,
3096 "Inspecting %s for group membership",
3099 for (i=0; grp->gr_mem && grp->gr_mem[i] != NULL; i++) {
3100 if (group != grp->gr_gid &&
3101 (strcmp(user, grp->gr_mem[i]) == 0)) {
3102 NWRAP_LOG(NWRAP_LOG_DEBUG,
3103 "%s is member of %s",
3107 groups = (gid_t *)realloc(groups,
3108 (size + 1) * sizeof(gid_t));
3109 if (groups == NULL) {
3110 NWRAP_LOG(NWRAP_LOG_ERROR,
3116 groups[size] = grp->gr_gid;
3122 nwrap_files_endgrent(b);
3124 NWRAP_LOG(NWRAP_LOG_DEBUG,
3125 "%s is member of %d groups",
3128 /* This really only works if uid_wrapper is loaded */
3129 rc = setgroups(size, groups);
3136 /* group functions */
3137 static struct group *nwrap_files_getgrnam(struct nwrap_backend *b,
3142 (void) b; /* unused */
3144 nwrap_files_cache_reload(nwrap_gr_global.cache);
3146 for (i=0; i<nwrap_gr_global.num; i++) {
3147 if (strcmp(nwrap_gr_global.list[i].gr_name, name) == 0) {
3148 NWRAP_LOG(NWRAP_LOG_DEBUG, "group[%s] found", name);
3149 return &nwrap_gr_global.list[i];
3151 NWRAP_LOG(NWRAP_LOG_DEBUG,
3152 "group[%s] does not match [%s]",
3154 nwrap_gr_global.list[i].gr_name);
3157 NWRAP_LOG(NWRAP_LOG_DEBUG, "group[%s] not found", name);
3163 static int nwrap_files_getgrnam_r(struct nwrap_backend *b,
3164 const char *name, struct group *grdst,
3165 char *buf, size_t buflen, struct group **grdstp)
3169 gr = nwrap_files_getgrnam(b, name);
3177 return nwrap_gr_copy_r(gr, grdst, buf, buflen, grdstp);
3180 static struct group *nwrap_files_getgrgid(struct nwrap_backend *b,
3185 (void) b; /* unused */
3187 nwrap_files_cache_reload(nwrap_gr_global.cache);
3189 for (i=0; i<nwrap_gr_global.num; i++) {
3190 if (nwrap_gr_global.list[i].gr_gid == gid) {
3191 NWRAP_LOG(NWRAP_LOG_DEBUG, "gid[%u] found", gid);
3192 return &nwrap_gr_global.list[i];
3194 NWRAP_LOG(NWRAP_LOG_DEBUG,
3195 "gid[%u] does not match [%u]",
3197 nwrap_gr_global.list[i].gr_gid);
3200 NWRAP_LOG(NWRAP_LOG_DEBUG, "gid[%u] not found", gid);
3206 static int nwrap_files_getgrgid_r(struct nwrap_backend *b,
3207 gid_t gid, struct group *grdst,
3208 char *buf, size_t buflen, struct group **grdstp)
3212 gr = nwrap_files_getgrgid(b, gid);
3220 return nwrap_gr_copy_r(gr, grdst, buf, buflen, grdstp);
3223 /* group enum functions */
3224 static void nwrap_files_setgrent(struct nwrap_backend *b)
3226 (void) b; /* unused */
3228 nwrap_gr_global.idx = 0;
3231 static struct group *nwrap_files_getgrent(struct nwrap_backend *b)
3235 (void) b; /* unused */
3237 if (nwrap_gr_global.idx == 0) {
3238 nwrap_files_cache_reload(nwrap_gr_global.cache);
3241 if (nwrap_gr_global.idx >= nwrap_gr_global.num) {
3246 gr = &nwrap_gr_global.list[nwrap_gr_global.idx++];
3248 NWRAP_LOG(NWRAP_LOG_DEBUG,
3249 "return group[%s] gid[%u]",
3250 gr->gr_name, gr->gr_gid);
3255 static int nwrap_files_getgrent_r(struct nwrap_backend *b,
3256 struct group *grdst, char *buf,
3257 size_t buflen, struct group **grdstp)
3261 gr = nwrap_files_getgrent(b);
3269 return nwrap_gr_copy_r(gr, grdst, buf, buflen, grdstp);
3272 static void nwrap_files_endgrent(struct nwrap_backend *b)
3274 (void) b; /* unused */
3276 nwrap_gr_global.idx = 0;
3279 /* hosts functions */
3280 static int nwrap_files_gethostbyname(const char *name, int af,
3281 struct hostent *result,
3282 struct nwrap_vector *addr_list)
3284 struct nwrap_entdata *ed_head;
3285 struct nwrap_entdata *ed_cur;
3290 char canon_name[DNS_NAME_MAX] = { 0 };
3292 bool he_found = false;
3294 nwrap_files_cache_reload(nwrap_he_global.cache);
3296 name_len = strlen(name);
3297 if (name_len < sizeof(canon_name) && name[name_len - 1] == '.') {
3298 strncpy(canon_name, name, name_len - 1);
3302 if (!str_tolower_copy(&h_name_lower, name)) {
3303 NWRAP_LOG(NWRAP_LOG_DEBUG,
3304 "Out of memory while converting to lower case");
3308 /* Look at hash table for element */
3309 NWRAP_LOG(NWRAP_LOG_DEBUG, "Searching for name: %s", h_name_lower);
3310 e.key = h_name_lower;
3312 e_p = hsearch(e, FIND);
3314 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s not found.", h_name_lower);
3315 SAFE_FREE(h_name_lower);
3318 SAFE_FREE(h_name_lower);
3320 /* Always cleanup vector and results */
3321 if (!nwrap_vector_is_initialized(addr_list)) {
3322 if (!nwrap_vector_init(addr_list)) {
3323 NWRAP_LOG(NWRAP_LOG_DEBUG,
3324 "Unable to initialize memory for addr_list vector");
3328 /* When vector is initialized data are valid no more.
3329 * Quick way how to free vector is: */
3330 addr_list->count = 0;
3333 /* Iterate through results */
3334 ed_head = (struct nwrap_entdata *)e_p->data;
3335 for (ed_cur = ed_head; ed_cur != NULL; ed_cur = ed_cur->ed_next) {
3338 /* Filter by address familiy if provided */
3339 if (af != AF_UNSPEC && he->h_addrtype != af) {
3345 * glibc doesn't return ipv6 addresses when AF_UNSPEC is used
3347 if (af == AF_UNSPEC && he->h_addrtype != AF_INET) {
3352 memcpy(result, he, sizeof(struct hostent));
3353 NWRAP_LOG(NWRAP_LOG_DEBUG,
3354 "Name found. Returning record for %s",
3358 nwrap_vector_merge(addr_list, &ed_cur->nwrap_addrdata);
3359 result->h_addr_list = nwrap_vector_head(addr_list);
3365 NWRAP_LOG(NWRAP_LOG_DEBUG,
3366 "Name found in database. No records matches type.");
3373 #ifdef HAVE_GETHOSTBYNAME_R
3374 static int nwrap_gethostbyname_r(const char *name,
3375 struct hostent *ret,
3376 char *buf, size_t buflen,
3377 struct hostent **result, int *h_errnop)
3379 struct nwrap_vector *addr_list = malloc(sizeof(struct nwrap_vector));
3382 if (addr_list == NULL) {
3383 NWRAP_LOG(NWRAP_LOG_ERROR,
3384 "Unable to allocate memory for address list");
3389 ZERO_STRUCTP(addr_list);
3391 rc = nwrap_files_gethostbyname(name, AF_UNSPEC, ret, addr_list);
3393 *h_errnop = h_errno;
3394 if (addr_list->items != NULL) {
3395 free(addr_list->items);
3397 SAFE_FREE(addr_list);
3402 if (buflen < (addr_list->count * sizeof(void *))) {
3403 SAFE_FREE(addr_list->items);
3404 SAFE_FREE(addr_list);
3408 /* Copy all to user provided buffer and change
3409 * pointers in returned structure.
3410 * +1 is for ending NULL pointer. */
3411 memcpy(buf, addr_list->items, (addr_list->count + 1) * sizeof(void *));
3413 free(addr_list->items);
3416 ret->h_addr_list = (char **)buf;
3421 int gethostbyname_r(const char *name,
3422 struct hostent *ret,
3423 char *buf, size_t buflen,
3424 struct hostent **result, int *h_errnop)
3426 if (!nss_wrapper_hosts_enabled()) {
3427 return libc_gethostbyname_r(name,
3435 return nwrap_gethostbyname_r(name, ret, buf, buflen, result, h_errnop);
3439 static struct addrinfo *nwrap_files_getaddrinfo(const char *name,
3440 unsigned short port,
3441 const struct addrinfo *hints,
3442 struct addrinfo **ai_tail)
3444 struct nwrap_entdata *ed_head;
3445 struct nwrap_entdata *ed_cur;
3447 struct addrinfo *ai = NULL;
3448 struct addrinfo *ai_head = NULL;
3449 struct addrinfo *ai_prev = NULL;
3452 char canon_name[DNS_NAME_MAX] = { 0 };
3453 bool skip_canonname = false;
3457 nwrap_files_cache_reload(nwrap_he_global.cache);
3459 name_len = strlen(name);
3460 if (name_len < DNS_NAME_MAX && name[name_len - 1] == '.') {
3461 strncpy(canon_name, name, name_len - 1);
3465 if (!str_tolower_copy(&h_name_lower, name)) {
3466 NWRAP_LOG(NWRAP_LOG_DEBUG,
3467 "Out of memory while converting to lower case");
3471 NWRAP_LOG(NWRAP_LOG_DEBUG, "Searching for name: %s", h_name_lower);
3472 e.key = h_name_lower;
3474 e_p = hsearch(e, FIND);
3476 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s not found.", h_name_lower);
3477 SAFE_FREE(h_name_lower);
3481 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name: %s found.", h_name_lower);
3482 SAFE_FREE(h_name_lower);
3484 ed_head = (struct nwrap_entdata *)e_p->data;
3486 for (ed_cur = ed_head; ed_cur != NULL; ed_cur = ed_cur->ed_next) {
3491 if (hints->ai_family != AF_UNSPEC &&
3492 he->h_addrtype != hints->ai_family) {
3496 /* Function allocates memory and returns it in ai. */
3497 rc = nwrap_convert_he_ai(he,
3503 /* FIXME: Investigate if this is nice to do... */
3504 NWRAP_LOG(NWRAP_LOG_ERROR,
3505 "Error in converting he to ai! Skipping.");
3508 skip_canonname = true;
3510 if (ai_head == NULL) {
3513 if (ai_prev != NULL) {
3514 ai_prev->ai_next = ai;
3523 static struct hostent *nwrap_files_gethostbyaddr(const void *addr,
3524 socklen_t len, int type)
3527 char ip[NWRAP_INET_ADDRSTRLEN] = {0};
3528 struct nwrap_entdata *ed;
3532 (void) len; /* unused */
3534 nwrap_files_cache_reload(nwrap_he_global.cache);
3536 a = inet_ntop(type, addr, ip, sizeof(ip));
3542 nwrap_vector_foreach(ed, nwrap_he_global.entdata, i)
3545 if (he->h_addrtype != type) {
3549 if (memcmp(addr, he->h_addr_list[0], he->h_length) == 0) {
3558 #ifdef HAVE_GETHOSTBYADDR_R
3559 static int nwrap_gethostbyaddr_r(const void *addr, socklen_t len, int type,
3560 struct hostent *ret,
3561 char *buf, size_t buflen,
3562 struct hostent **result, int *h_errnop)
3564 *result = nwrap_files_gethostbyaddr(addr, len, type);
3565 if (*result != NULL) {
3566 memset(buf, '\0', buflen);
3570 *h_errnop = h_errno;
3575 int gethostbyaddr_r(const void *addr, socklen_t len, int type,
3576 struct hostent *ret,
3577 char *buf, size_t buflen,
3578 struct hostent **result, int *h_errnop)
3580 if (!nss_wrapper_hosts_enabled()) {
3581 return libc_gethostbyaddr_r(addr,
3591 return nwrap_gethostbyaddr_r(addr, len, type, ret, buf, buflen, result, h_errnop);
3595 /* hosts enum functions */
3596 static void nwrap_files_sethostent(void)
3598 nwrap_he_global.idx = 0;
3601 static struct hostent *nwrap_files_gethostent(void)
3605 if (nwrap_he_global.idx == 0) {
3606 nwrap_files_cache_reload(nwrap_he_global.cache);
3609 if (nwrap_he_global.idx >= nwrap_he_global.num) {
3614 he = &((struct nwrap_entdata *)nwrap_he_global.entdata.items[nwrap_he_global.idx++])->ht;
3616 NWRAP_LOG(NWRAP_LOG_DEBUG, "return hosts[%s]", he->h_name);
3621 static void nwrap_files_endhostent(void)
3623 nwrap_he_global.idx = 0;
3631 static struct passwd *nwrap_module_getpwnam(struct nwrap_backend *b,
3634 static struct passwd pwd;
3635 static char buf[1000];
3638 if (!b->fns->_nss_getpwnam_r) {
3642 status = b->fns->_nss_getpwnam_r(name, &pwd, buf, sizeof(buf), &errno);
3643 if (status == NSS_STATUS_NOTFOUND) {
3646 if (status != NSS_STATUS_SUCCESS) {
3653 static int nwrap_module_getpwnam_r(struct nwrap_backend *b,
3654 const char *name, struct passwd *pwdst,
3655 char *buf, size_t buflen, struct passwd **pwdstp)
3659 (void) b; /* unused */
3660 (void) pwdst; /* unused */
3661 (void) pwdstp; /* unused */
3663 if (!b->fns->_nss_getpwnam_r) {
3664 return NSS_STATUS_NOTFOUND;
3667 ret = b->fns->_nss_getpwnam_r(name, pwdst, buf, buflen, &errno);
3669 case NSS_STATUS_SUCCESS:
3671 case NSS_STATUS_NOTFOUND:
3676 case NSS_STATUS_TRYAGAIN:
3689 static struct passwd *nwrap_module_getpwuid(struct nwrap_backend *b,
3692 static struct passwd pwd;
3693 static char buf[1000];
3696 if (!b->fns->_nss_getpwuid_r) {
3700 status = b->fns->_nss_getpwuid_r(uid, &pwd, buf, sizeof(buf), &errno);
3701 if (status == NSS_STATUS_NOTFOUND) {
3704 if (status != NSS_STATUS_SUCCESS) {
3710 static int nwrap_module_getpwuid_r(struct nwrap_backend *b,
3711 uid_t uid, struct passwd *pwdst,
3712 char *buf, size_t buflen, struct passwd **pwdstp)
3716 (void) pwdstp; /* unused */
3718 if (!b->fns->_nss_getpwuid_r) {
3722 ret = b->fns->_nss_getpwuid_r(uid, pwdst, buf, buflen, &errno);
3724 case NSS_STATUS_SUCCESS:
3726 case NSS_STATUS_NOTFOUND:
3731 case NSS_STATUS_TRYAGAIN:
3744 static void nwrap_module_setpwent(struct nwrap_backend *b)
3746 if (!b->fns->_nss_setpwent) {
3750 b->fns->_nss_setpwent();
3753 static struct passwd *nwrap_module_getpwent(struct nwrap_backend *b)
3755 static struct passwd pwd;
3756 static char buf[1000];
3759 if (!b->fns->_nss_getpwent_r) {
3763 status = b->fns->_nss_getpwent_r(&pwd, buf, sizeof(buf), &errno);
3764 if (status == NSS_STATUS_NOTFOUND) {
3767 if (status != NSS_STATUS_SUCCESS) {
3773 static int nwrap_module_getpwent_r(struct nwrap_backend *b,
3774 struct passwd *pwdst, char *buf,
3775 size_t buflen, struct passwd **pwdstp)
3779 (void) pwdstp; /* unused */
3781 if (!b->fns->_nss_getpwent_r) {
3785 ret = b->fns->_nss_getpwent_r(pwdst, buf, buflen, &errno);
3787 case NSS_STATUS_SUCCESS:
3789 case NSS_STATUS_NOTFOUND:
3794 case NSS_STATUS_TRYAGAIN:
3807 static void nwrap_module_endpwent(struct nwrap_backend *b)
3809 if (!b->fns->_nss_endpwent) {
3813 b->fns->_nss_endpwent();
3816 static int nwrap_module_initgroups(struct nwrap_backend *b,
3817 const char *user, gid_t group)
3823 if (!b->fns->_nss_initgroups) {
3824 return NSS_STATUS_UNAVAIL;
3827 return b->fns->_nss_initgroups(user, group, &start, &size, &groups, 0, &errno);
3830 static struct group *nwrap_module_getgrnam(struct nwrap_backend *b,
3833 static struct group grp;
3835 static int buflen = 1000;
3838 if (!b->fns->_nss_getgrnam_r) {
3843 buf = (char *)malloc(buflen);
3846 status = b->fns->_nss_getgrnam_r(name, &grp, buf, buflen, &errno);
3847 if (status == NSS_STATUS_TRYAGAIN) {
3849 buf = (char *)realloc(buf, buflen);
3855 if (status == NSS_STATUS_NOTFOUND) {
3859 if (status != NSS_STATUS_SUCCESS) {
3866 static int nwrap_module_getgrnam_r(struct nwrap_backend *b,
3867 const char *name, struct group *grdst,
3868 char *buf, size_t buflen, struct group **grdstp)
3872 (void) grdstp; /* unused */
3874 if (!b->fns->_nss_getgrnam_r) {
3878 ret = b->fns->_nss_getgrnam_r(name, grdst, buf, buflen, &errno);
3880 case NSS_STATUS_SUCCESS:
3882 case NSS_STATUS_NOTFOUND:
3887 case NSS_STATUS_TRYAGAIN:
3900 static struct group *nwrap_module_getgrgid(struct nwrap_backend *b,
3903 static struct group grp;
3905 static int buflen = 1000;
3908 if (!b->fns->_nss_getgrgid_r) {
3913 buf = (char *)malloc(buflen);
3917 status = b->fns->_nss_getgrgid_r(gid, &grp, buf, buflen, &errno);
3918 if (status == NSS_STATUS_TRYAGAIN) {
3920 buf = (char *)realloc(buf, buflen);
3926 if (status == NSS_STATUS_NOTFOUND) {
3930 if (status != NSS_STATUS_SUCCESS) {
3937 static int nwrap_module_getgrgid_r(struct nwrap_backend *b,
3938 gid_t gid, struct group *grdst,
3939 char *buf, size_t buflen, struct group **grdstp)
3943 (void) grdstp; /* unused */
3945 if (!b->fns->_nss_getgrgid_r) {
3949 ret = b->fns->_nss_getgrgid_r(gid, grdst, buf, buflen, &errno);
3951 case NSS_STATUS_SUCCESS:
3953 case NSS_STATUS_NOTFOUND:
3958 case NSS_STATUS_TRYAGAIN:
3971 static void nwrap_module_setgrent(struct nwrap_backend *b)
3973 if (!b->fns->_nss_setgrent) {
3977 b->fns->_nss_setgrent();
3980 static struct group *nwrap_module_getgrent(struct nwrap_backend *b)
3982 static struct group grp;
3984 static int buflen = 1024;
3987 if (!b->fns->_nss_getgrent_r) {
3992 buf = (char *)malloc(buflen);
3996 status = b->fns->_nss_getgrent_r(&grp, buf, buflen, &errno);
3997 if (status == NSS_STATUS_TRYAGAIN) {
3999 buf = (char *)realloc(buf, buflen);
4005 if (status == NSS_STATUS_NOTFOUND) {
4009 if (status != NSS_STATUS_SUCCESS) {
4016 static int nwrap_module_getgrent_r(struct nwrap_backend *b,
4017 struct group *grdst, char *buf,
4018 size_t buflen, struct group **grdstp)
4022 (void) grdstp; /* unused */
4024 if (!b->fns->_nss_getgrent_r) {
4028 ret = b->fns->_nss_getgrent_r(grdst, buf, buflen, &errno);
4030 case NSS_STATUS_SUCCESS:
4032 case NSS_STATUS_NOTFOUND:
4037 case NSS_STATUS_TRYAGAIN:
4050 static void nwrap_module_endgrent(struct nwrap_backend *b)
4052 if (!b->fns->_nss_endgrent) {
4056 b->fns->_nss_endgrent();
4059 /****************************************************************************
4061 ***************************************************************************/
4063 static struct passwd *nwrap_getpwnam(const char *name)
4068 for (i=0; i < nwrap_main_global->num_backends; i++) {
4069 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4070 pwd = b->ops->nw_getpwnam(b, name);
4079 struct passwd *getpwnam(const char *name)
4081 if (!nss_wrapper_enabled()) {
4082 return libc_getpwnam(name);
4085 return nwrap_getpwnam(name);
4088 /****************************************************************************
4090 ***************************************************************************/
4092 static int nwrap_getpwnam_r(const char *name, struct passwd *pwdst,
4093 char *buf, size_t buflen, struct passwd **pwdstp)
4097 for (i=0; i < nwrap_main_global->num_backends; i++) {
4098 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4099 ret = b->ops->nw_getpwnam_r(b, name, pwdst, buf, buflen, pwdstp);
4100 if (ret == ENOENT) {
4109 #ifdef HAVE_GETPWNAM_R
4110 # ifdef HAVE_SOLARIS_GETPWNAM_R
4111 int getpwnam_r(const char *name, struct passwd *pwdst,
4112 char *buf, int buflen, struct passwd **pwdstp)
4113 # else /* HAVE_SOLARIS_GETPWNAM_R */
4114 int getpwnam_r(const char *name, struct passwd *pwdst,
4115 char *buf, size_t buflen, struct passwd **pwdstp)
4116 # endif /* HAVE_SOLARIS_GETPWNAM_R */
4118 if (!nss_wrapper_enabled()) {
4119 return libc_getpwnam_r(name, pwdst, buf, buflen, pwdstp);
4122 return nwrap_getpwnam_r(name, pwdst, buf, buflen, pwdstp);
4126 /****************************************************************************
4128 ***************************************************************************/
4130 static struct passwd *nwrap_getpwuid(uid_t uid)
4135 for (i=0; i < nwrap_main_global->num_backends; i++) {
4136 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4137 pwd = b->ops->nw_getpwuid(b, uid);
4146 struct passwd *getpwuid(uid_t uid)
4148 if (!nss_wrapper_enabled()) {
4149 return libc_getpwuid(uid);
4152 return nwrap_getpwuid(uid);
4155 /****************************************************************************
4157 ***************************************************************************/
4159 static int nwrap_getpwuid_r(uid_t uid, struct passwd *pwdst,
4160 char *buf, size_t buflen, struct passwd **pwdstp)
4164 for (i=0; i < nwrap_main_global->num_backends; i++) {
4165 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4166 ret = b->ops->nw_getpwuid_r(b, uid, pwdst, buf, buflen, pwdstp);
4167 if (ret == ENOENT) {
4176 #ifdef HAVE_SOLARIS_GETPWUID_R
4177 int getpwuid_r(uid_t uid, struct passwd *pwdst,
4178 char *buf, int buflen, struct passwd **pwdstp)
4180 int getpwuid_r(uid_t uid, struct passwd *pwdst,
4181 char *buf, size_t buflen, struct passwd **pwdstp)
4184 if (!nss_wrapper_enabled()) {
4185 return libc_getpwuid_r(uid, pwdst, buf, buflen, pwdstp);
4188 return nwrap_getpwuid_r(uid, pwdst, buf, buflen, pwdstp);
4191 /****************************************************************************
4193 ***************************************************************************/
4195 static void nwrap_setpwent(void)
4199 for (i=0; i < nwrap_main_global->num_backends; i++) {
4200 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4201 b->ops->nw_setpwent(b);
4207 if (!nss_wrapper_enabled()) {
4215 /****************************************************************************
4217 ***************************************************************************/
4219 static struct passwd *nwrap_getpwent(void)
4224 for (i=0; i < nwrap_main_global->num_backends; i++) {
4225 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4226 pwd = b->ops->nw_getpwent(b);
4235 struct passwd *getpwent(void)
4237 if (!nss_wrapper_enabled()) {
4238 return libc_getpwent();
4241 return nwrap_getpwent();
4244 /****************************************************************************
4246 ***************************************************************************/
4248 static int nwrap_getpwent_r(struct passwd *pwdst, char *buf,
4249 size_t buflen, struct passwd **pwdstp)
4253 for (i=0; i < nwrap_main_global->num_backends; i++) {
4254 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4255 ret = b->ops->nw_getpwent_r(b, pwdst, buf, buflen, pwdstp);
4256 if (ret == ENOENT) {
4265 #ifdef HAVE_SOLARIS_GETPWENT_R
4266 struct passwd *getpwent_r(struct passwd *pwdst, char *buf, int buflen)
4268 struct passwd *pwdstp = NULL;
4271 if (!nss_wrapper_enabled()) {
4272 return libc_getpwent_r(pwdst, buf, buflen);
4274 rc = nwrap_getpwent_r(pwdst, buf, buflen, &pwdstp);
4281 #else /* HAVE_SOLARIS_GETPWENT_R */
4282 int getpwent_r(struct passwd *pwdst, char *buf,
4283 size_t buflen, struct passwd **pwdstp)
4285 if (!nss_wrapper_enabled()) {
4286 return libc_getpwent_r(pwdst, buf, buflen, pwdstp);
4289 return nwrap_getpwent_r(pwdst, buf, buflen, pwdstp);
4291 #endif /* HAVE_SOLARIS_GETPWENT_R */
4293 /****************************************************************************
4295 ***************************************************************************/
4297 static void nwrap_endpwent(void)
4301 for (i=0; i < nwrap_main_global->num_backends; i++) {
4302 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4303 b->ops->nw_endpwent(b);
4309 if (!nss_wrapper_enabled()) {
4317 /****************************************************************************
4319 ***************************************************************************/
4321 static int nwrap_initgroups(const char *user, gid_t group)
4325 for (i=0; i < nwrap_main_global->num_backends; i++) {
4326 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4329 rc = b->ops->nw_initgroups(b, user, group);
4339 int initgroups(const char *user, gid_t group)
4341 if (!nss_wrapper_enabled()) {
4342 return libc_initgroups(user, group);
4345 return nwrap_initgroups(user, group);
4348 /****************************************************************************
4350 ***************************************************************************/
4352 static struct group *nwrap_getgrnam(const char *name)
4357 for (i=0; i < nwrap_main_global->num_backends; i++) {
4358 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4359 grp = b->ops->nw_getgrnam(b, name);
4368 struct group *getgrnam(const char *name)
4370 if (!nss_wrapper_enabled()) {
4371 return libc_getgrnam(name);
4374 return nwrap_getgrnam(name);
4377 /****************************************************************************
4379 ***************************************************************************/
4381 static int nwrap_getgrnam_r(const char *name, struct group *grdst,
4382 char *buf, size_t buflen, struct group **grdstp)
4386 for (i=0; i < nwrap_main_global->num_backends; i++) {
4387 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4388 ret = b->ops->nw_getgrnam_r(b, name, grdst, buf, buflen, grdstp);
4389 if (ret == ENOENT) {
4398 #ifdef HAVE_GETGRNAM_R
4399 # ifdef HAVE_SOLARIS_GETGRNAM_R
4400 int getgrnam_r(const char *name, struct group *grp,
4401 char *buf, int buflen, struct group **pgrp)
4402 # else /* HAVE_SOLARIS_GETGRNAM_R */
4403 int getgrnam_r(const char *name, struct group *grp,
4404 char *buf, size_t buflen, struct group **pgrp)
4405 # endif /* HAVE_SOLARIS_GETGRNAM_R */
4407 if (!nss_wrapper_enabled()) {
4408 return libc_getgrnam_r(name,
4415 return nwrap_getgrnam_r(name, grp, buf, buflen, pgrp);
4417 #endif /* HAVE_GETGRNAM_R */
4419 /****************************************************************************
4421 ***************************************************************************/
4423 static struct group *nwrap_getgrgid(gid_t gid)
4428 for (i=0; i < nwrap_main_global->num_backends; i++) {
4429 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4430 grp = b->ops->nw_getgrgid(b, gid);
4439 struct group *getgrgid(gid_t gid)
4441 if (!nss_wrapper_enabled()) {
4442 return libc_getgrgid(gid);
4445 return nwrap_getgrgid(gid);
4448 /****************************************************************************
4450 ***************************************************************************/
4452 static int nwrap_getgrgid_r(gid_t gid, struct group *grdst,
4453 char *buf, size_t buflen, struct group **grdstp)
4457 for (i=0; i < nwrap_main_global->num_backends; i++) {
4458 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4459 ret = b->ops->nw_getgrgid_r(b, gid, grdst, buf, buflen, grdstp);
4460 if (ret == ENOENT) {
4469 #ifdef HAVE_GETGRGID_R
4470 # ifdef HAVE_SOLARIS_GETGRGID_R
4471 int getgrgid_r(gid_t gid, struct group *grdst,
4472 char *buf, int buflen, struct group **grdstp)
4473 # else /* HAVE_SOLARIS_GETGRGID_R */
4474 int getgrgid_r(gid_t gid, struct group *grdst,
4475 char *buf, size_t buflen, struct group **grdstp)
4476 # endif /* HAVE_SOLARIS_GETGRGID_R */
4478 if (!nss_wrapper_enabled()) {
4479 return libc_getgrgid_r(gid, grdst, buf, buflen, grdstp);
4482 return nwrap_getgrgid_r(gid, grdst, buf, buflen, grdstp);
4486 /****************************************************************************
4488 ***************************************************************************/
4490 static void nwrap_setgrent(void)
4494 for (i=0; i < nwrap_main_global->num_backends; i++) {
4495 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4496 b->ops->nw_setgrent(b);
4500 #ifdef HAVE_BSD_SETGRENT
4506 if (!nss_wrapper_enabled()) {
4514 #ifdef HAVE_BSD_SETGRENT
4521 /****************************************************************************
4523 ***************************************************************************/
4525 static struct group *nwrap_getgrent(void)
4530 for (i=0; i < nwrap_main_global->num_backends; i++) {
4531 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4532 grp = b->ops->nw_getgrent(b);
4541 struct group *getgrent(void)
4543 if (!nss_wrapper_enabled()) {
4544 return libc_getgrent();
4547 return nwrap_getgrent();
4550 /****************************************************************************
4552 ***************************************************************************/
4554 static int nwrap_getgrent_r(struct group *grdst, char *buf,
4555 size_t buflen, struct group **grdstp)
4559 for (i=0; i < nwrap_main_global->num_backends; i++) {
4560 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4561 ret = b->ops->nw_getgrent_r(b, grdst, buf, buflen, grdstp);
4562 if (ret == ENOENT) {
4571 #ifdef HAVE_SOLARIS_GETGRENT_R
4572 struct group *getgrent_r(struct group *src, char *buf, int buflen)
4574 struct group *grdstp = NULL;
4577 if (!nss_wrapper_enabled()) {
4578 return libc_getgrent_r(src, buf, buflen);
4581 rc = nwrap_getgrent_r(src, buf, buflen, &grdstp);
4588 #else /* HAVE_SOLARIS_GETGRENT_R */
4589 int getgrent_r(struct group *src, char *buf,
4590 size_t buflen, struct group **grdstp)
4592 if (!nss_wrapper_enabled()) {
4593 return libc_getgrent_r(src, buf, buflen, grdstp);
4596 return nwrap_getgrent_r(src, buf, buflen, grdstp);
4598 #endif /* HAVE_SOLARIS_GETGRENT_R */
4600 /****************************************************************************
4602 ***************************************************************************/
4604 static void nwrap_endgrent(void)
4608 for (i=0; i < nwrap_main_global->num_backends; i++) {
4609 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4610 b->ops->nw_endgrent(b);
4616 if (!nss_wrapper_enabled()) {
4624 /****************************************************************************
4626 ***************************************************************************/
4628 #ifdef HAVE_GETGROUPLIST
4629 static int nwrap_getgrouplist(const char *user, gid_t group,
4630 gid_t *groups, int *ngroups)
4636 NWRAP_LOG(NWRAP_LOG_DEBUG, "getgrouplist called for %s", user);
4638 groups_tmp = (gid_t *)malloc(count * sizeof(gid_t));
4640 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
4644 groups_tmp[0] = group;
4647 while ((grp = nwrap_getgrent()) != NULL) {
4650 NWRAP_LOG(NWRAP_LOG_DEBUG,
4651 "Inspecting %s for group membership",
4654 for (i=0; grp->gr_mem && grp->gr_mem[i] != NULL; i++) {
4656 if (group != grp->gr_gid &&
4657 (strcmp(user, grp->gr_mem[i]) == 0)) {
4659 NWRAP_LOG(NWRAP_LOG_DEBUG,
4660 "%s is member of %s",
4664 groups_tmp = (gid_t *)realloc(groups_tmp, (count + 1) * sizeof(gid_t));
4666 NWRAP_LOG(NWRAP_LOG_ERROR,
4671 groups_tmp[count] = grp->gr_gid;
4680 NWRAP_LOG(NWRAP_LOG_DEBUG,
4681 "%s is member of %d groups",
4684 if (*ngroups < count) {
4691 memcpy(groups, groups_tmp, count * sizeof(gid_t));
4697 int getgrouplist(const char *user, gid_t group, gid_t *groups, int *ngroups)
4699 if (!nss_wrapper_enabled()) {
4700 return libc_getgrouplist(user, group, groups, ngroups);
4703 return nwrap_getgrouplist(user, group, groups, ngroups);
4707 /**********************************************************
4709 **********************************************************/
4711 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
4713 #ifdef HAVE_SETSPENT
4714 static void nwrap_setspent(void)
4716 nwrap_files_setspent();
4721 if (!nss_wrapper_shadow_enabled()) {
4728 static struct spwd *nwrap_getspent(void)
4730 return nwrap_files_getspent();
4733 struct spwd *getspent(void)
4735 if (!nss_wrapper_shadow_enabled()) {
4739 return nwrap_getspent();
4742 static void nwrap_endspent(void)
4744 nwrap_files_endspent();
4749 if (!nss_wrapper_shadow_enabled()) {
4755 #endif /* HAVE_SETSPENT */
4757 static struct spwd *nwrap_getspnam(const char *name)
4759 return nwrap_files_getspnam(name);
4762 struct spwd *getspnam(const char *name)
4764 if (!nss_wrapper_shadow_enabled()) {
4768 return nwrap_getspnam(name);
4771 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
4773 /**********************************************************
4775 **********************************************************/
4777 static void nwrap_sethostent(int stayopen) {
4778 (void) stayopen; /* ignored */
4780 nwrap_files_sethostent();
4783 #ifdef HAVE_SOLARIS_SETHOSTENT
4784 int sethostent(int stayopen)
4786 if (!nss_wrapper_hosts_enabled()) {
4787 libc_sethostent(stayopen);
4791 nwrap_sethostent(stayopen);
4795 #else /* HAVE_SOLARIS_SETHOSTENT */
4796 void sethostent(int stayopen)
4798 if (!nss_wrapper_hosts_enabled()) {
4799 libc_sethostent(stayopen);
4803 nwrap_sethostent(stayopen);
4805 #endif /* HAVE_SOLARIS_SETHOSTENT */
4807 static struct hostent *nwrap_gethostent(void)
4809 return nwrap_files_gethostent();
4812 struct hostent *gethostent(void) {
4813 if (!nss_wrapper_hosts_enabled()) {
4814 return libc_gethostent();
4817 return nwrap_gethostent();
4820 static void nwrap_endhostent(void) {
4821 nwrap_files_endhostent();
4824 #ifdef HAVE_SOLARIS_ENDHOSTENT
4825 int endhostent(void)
4827 if (!nss_wrapper_hosts_enabled()) {
4836 #else /* HAVE_SOLARIS_ENDHOSTENT */
4837 void endhostent(void)
4839 if (!nss_wrapper_hosts_enabled()) {
4846 #endif /* HAVE_SOLARIS_ENDHOSTENT */
4849 /* BSD implementation stores data in thread local storage but GLIBC does not */
4850 static __thread struct hostent user_he;
4851 static __thread struct nwrap_vector user_addrlist;
4853 static struct hostent user_he;
4854 static struct nwrap_vector user_addrlist;
4856 static struct hostent *nwrap_gethostbyname(const char *name)
4858 if (nwrap_files_gethostbyname(name, AF_UNSPEC, &user_he, &user_addrlist) == -1) {
4864 struct hostent *gethostbyname(const char *name)
4866 if (!nss_wrapper_hosts_enabled()) {
4867 return libc_gethostbyname(name);
4870 return nwrap_gethostbyname(name);
4873 /* This is a GNU extension - Also can be found on BSD systems */
4874 #ifdef HAVE_GETHOSTBYNAME2
4876 /* BSD implementation stores data in thread local storage but GLIBC not */
4877 static __thread struct hostent user_he2;
4878 static __thread struct nwrap_vector user_addrlist2;
4880 static struct hostent user_he2;
4881 static struct nwrap_vector user_addrlist2;
4883 static struct hostent *nwrap_gethostbyname2(const char *name, int af)
4885 if (nwrap_files_gethostbyname(name, af, &user_he2, &user_addrlist2) == -1) {
4891 struct hostent *gethostbyname2(const char *name, int af)
4893 if (!nss_wrapper_hosts_enabled()) {
4894 return libc_gethostbyname2(name, af);
4897 return nwrap_gethostbyname2(name, af);
4901 static struct hostent *nwrap_gethostbyaddr(const void *addr,
4902 socklen_t len, int type)
4904 return nwrap_files_gethostbyaddr(addr, len, type);
4907 struct hostent *gethostbyaddr(const void *addr,
4908 socklen_t len, int type)
4910 if (!nss_wrapper_hosts_enabled()) {
4911 return libc_gethostbyaddr(addr, len, type);
4914 return nwrap_gethostbyaddr(addr, len, type);
4917 static const struct addrinfo default_hints =
4919 .ai_flags = AI_ADDRCONFIG|AI_V4MAPPED,
4920 .ai_family = AF_UNSPEC,
4925 .ai_canonname = NULL,
4929 static int nwrap_convert_he_ai(const struct hostent *he,
4930 unsigned short port,
4931 const struct addrinfo *hints,
4932 struct addrinfo **pai,
4933 bool skip_canonname)
4935 struct addrinfo *ai;
4942 switch (he->h_addrtype) {
4944 socklen = sizeof(struct sockaddr_in);
4948 socklen = sizeof(struct sockaddr_in6);
4955 ai = (struct addrinfo *)malloc(sizeof(struct addrinfo) + socklen);
4961 ai->ai_family = he->h_addrtype;
4962 ai->ai_socktype = hints->ai_socktype;
4963 ai->ai_protocol = hints->ai_protocol;
4964 ai->ai_canonname = NULL;
4966 ai->ai_addrlen = socklen;
4967 ai->ai_addr = (void *)(ai + 1);
4969 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
4970 ai->ai_addr->sa_len = socklen;
4972 ai->ai_addr->sa_family = he->h_addrtype;
4974 switch (he->h_addrtype) {
4977 struct sockaddr_in *sinp =
4978 (struct sockaddr_in *) ai->ai_addr;
4980 memset(sinp, 0, sizeof(struct sockaddr_in));
4982 sinp->sin_port = htons(port);
4983 sinp->sin_family = AF_INET;
4985 memset (sinp->sin_zero, '\0', sizeof (sinp->sin_zero));
4986 memcpy(&sinp->sin_addr, he->h_addr_list[0], he->h_length);
4993 struct sockaddr_in6 *sin6p =
4994 (struct sockaddr_in6 *) ai->ai_addr;
4996 memset(sin6p, 0, sizeof(struct sockaddr_in6));
4998 sin6p->sin6_port = htons(port);
4999 sin6p->sin6_family = AF_INET6;
5001 memcpy(&sin6p->sin6_addr,
5011 if (he->h_name && !skip_canonname) {
5012 ai->ai_canonname = strdup(he->h_name);
5013 if (ai->ai_canonname == NULL) {
5023 static int nwrap_getaddrinfo(const char *node,
5024 const char *service,
5025 const struct addrinfo *hints,
5026 struct addrinfo **res)
5028 struct addrinfo *ai = NULL;
5029 struct addrinfo *ai_tail;
5030 unsigned short port = 0;
5040 .family = AF_UNSPEC,
5043 if (node == NULL && service == NULL) {
5047 if (hints == NULL) {
5048 hints = &default_hints;
5052 hints.ai_flags contains invalid flags; or, hints.ai_flags
5053 included AI_CANONNAME and name was NULL.
5055 if ((hints->ai_flags & AI_CANONNAME) && (node == NULL)) {
5056 return EAI_BADFLAGS;
5059 /* If no node has been specified, let glibc deal with it */
5062 struct addrinfo *p = NULL;
5064 ret = libc_getaddrinfo(node, service, hints, &p);
5072 if (service != NULL && service[0] != '\0') {
5073 const char *proto = NULL;
5079 sl = strtol(service, &end_ptr, 10);
5081 if (*end_ptr == '\0') {
5084 } else if (hints->ai_flags & AI_NUMERICSERV) {
5088 if (hints->ai_protocol != 0) {
5089 struct protoent *pent;
5091 pent = getprotobynumber(hints->ai_protocol);
5093 proto = pent->p_name;
5097 s = getservbyname(service, proto);
5101 port = ntohs(s->s_port);
5105 if (hints->ai_family == AF_UNSPEC || hints->ai_family == AF_INET) {
5106 int rc = inet_pton(AF_INET, node, &addr.in.v4);
5108 addr.family = AF_INET;
5112 if (addr.family == AF_UNSPEC) {
5113 int rc = inet_pton(AF_INET6, node, &addr.in.v6);
5115 addr.family = AF_INET6;
5120 ai = nwrap_files_getaddrinfo(node, port, hints, &ai_tail);
5123 struct addrinfo *p = NULL;
5125 ret = libc_getaddrinfo(node, service, hints, &p);
5129 * nwrap_files_getaddrinfo failed, but libc was
5130 * successful -- use the result from libc.
5139 if (ai->ai_flags == 0) {
5140 ai->ai_flags = hints->ai_flags;
5142 if (ai->ai_socktype == 0) {
5143 ai->ai_socktype = SOCK_DGRAM;
5145 if (ai->ai_protocol == 0 && ai->ai_socktype == SOCK_DGRAM) {
5146 ai->ai_protocol = 17; /* UDP */
5147 } else if (ai->ai_protocol == 0 && ai->ai_socktype == SOCK_STREAM) {
5148 ai->ai_protocol = 6; /* TCP */
5151 if (hints->ai_socktype == 0) {
5153 struct addrinfo *ai_head = ai;
5154 struct addrinfo *ai_tmp;
5155 struct addrinfo *ai_new_tail = ai_tail;
5157 /* Add at least one more struct */
5160 ai_tmp = malloc(sizeof(struct addrinfo));
5161 memcpy(ai_tmp, ai_head, sizeof(struct addrinfo));
5162 ai_tmp->ai_next = NULL;
5164 /* We need a deep copy or freeaddrinfo() will blow up */
5165 if (ai_head->ai_canonname != NULL) {
5166 ai_tmp->ai_canonname =
5167 strdup(ai_head->ai_canonname);
5169 /* ai_head should point inside hints. */
5170 ai_tmp->ai_addr = ai_head->ai_addr;
5172 if (ai_head->ai_flags == 0) {
5173 ai_tmp->ai_flags = hints->ai_flags;
5175 if (ai_head->ai_socktype == SOCK_DGRAM) {
5176 ai_tmp->ai_socktype = SOCK_STREAM;
5177 } else if (ai_head->ai_socktype == SOCK_STREAM) {
5178 ai_tmp->ai_socktype = SOCK_DGRAM;
5180 if (ai_head->ai_socktype == SOCK_DGRAM) {
5181 ai_tmp->ai_protocol = 17; /* UDP */
5182 } else if (ai_head->ai_socktype == SOCK_STREAM) {
5183 ai_tmp->ai_protocol = 6; /* TCP */
5185 ai_new_tail->ai_next = ai_tmp;
5186 ai_new_tail = ai_tmp;
5188 if (ai_head == ai_tail) {
5191 ai_head = ai_head->ai_next;
5200 int getaddrinfo(const char *node, const char *service,
5201 const struct addrinfo *hints,
5202 struct addrinfo **res)
5204 if (!nss_wrapper_hosts_enabled()) {
5205 return libc_getaddrinfo(node, service, hints, res);
5208 return nwrap_getaddrinfo(node, service, hints, res);
5211 static int nwrap_getnameinfo(const struct sockaddr *sa, socklen_t salen,
5212 char *host, size_t hostlen,
5213 char *serv, size_t servlen,
5217 struct servent *service;
5224 if (sa == NULL || salen < sizeof(sa_family_t)) {
5228 if ((flags & NI_NAMEREQD) && host == NULL && serv == NULL) {
5232 type = sa->sa_family;
5235 if (salen < sizeof(struct sockaddr_in))
5237 addr = &((const struct sockaddr_in *)sa)->sin_addr;
5238 addrlen = sizeof(((const struct sockaddr_in *)sa)->sin_addr);
5239 port = ntohs(((const struct sockaddr_in *)sa)->sin_port);
5243 if (salen < sizeof(struct sockaddr_in6))
5245 addr = &((const struct sockaddr_in6 *)sa)->sin6_addr;
5246 addrlen = sizeof(((const struct sockaddr_in6 *)sa)->sin6_addr);
5247 port = ntohs(((const struct sockaddr_in6 *)sa)->sin6_port);
5256 if ((flags & NI_NUMERICHOST) == 0) {
5257 he = nwrap_files_gethostbyaddr(addr, addrlen, type);
5258 if ((flags & NI_NAMEREQD) && (he == NULL || he->h_name == NULL))
5261 if (he != NULL && he->h_name != NULL) {
5262 if (strlen(he->h_name) >= hostlen)
5263 return EAI_OVERFLOW;
5264 strcpy(host, he->h_name);
5265 if (flags & NI_NOFQDN)
5266 host[strcspn(host, ".")] = '\0';
5268 if (inet_ntop(type, addr, host, hostlen) == NULL)
5269 return (errno == ENOSPC) ? EAI_OVERFLOW : EAI_FAIL;
5275 if ((flags & NI_NUMERICSERV) == 0) {
5276 proto = (flags & NI_DGRAM) ? "udp" : "tcp";
5277 service = getservbyport(htons(port), proto);
5279 if (service != NULL) {
5280 if (strlen(service->s_name) >= servlen)
5281 return EAI_OVERFLOW;
5282 strcpy(serv, service->s_name);
5284 if (snprintf(serv, servlen, "%u", port) >= (int) servlen)
5285 return EAI_OVERFLOW;
5292 #ifdef HAVE_LINUX_GETNAMEINFO
5293 int getnameinfo(const struct sockaddr *sa, socklen_t salen,
5294 char *host, socklen_t hostlen,
5295 char *serv, socklen_t servlen,
5297 #elif defined(HAVE_LINUX_GETNAMEINFO_UNSIGNED)
5298 int getnameinfo(const struct sockaddr *sa, socklen_t salen,
5299 char *host, socklen_t hostlen,
5300 char *serv, socklen_t servlen,
5303 int getnameinfo(const struct sockaddr *sa, socklen_t salen,
5304 char *host, size_t hostlen,
5305 char *serv, size_t servlen,
5309 if (!nss_wrapper_hosts_enabled()) {
5310 return libc_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
5313 return nwrap_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
5316 static int nwrap_gethostname(char *name, size_t len)
5318 const char *hostname = getenv("NSS_WRAPPER_HOSTNAME");
5320 if (strlen(hostname) >= len) {
5321 errno = ENAMETOOLONG;
5324 snprintf(name, len, "%s", hostname);
5329 #ifdef HAVE_SOLARIS_GETHOSTNAME
5330 int gethostname(char *name, int len)
5331 #else /* HAVE_SOLARIS_GETHOSTNAME */
5332 int gethostname(char *name, size_t len)
5333 #endif /* HAVE_SOLARIS_GETHOSTNAME */
5335 if (!nwrap_hostname_enabled()) {
5336 return libc_gethostname(name, len);
5339 return nwrap_gethostname(name, len);
5342 /****************************
5344 ***************************/
5347 * This function is called when the library is unloaded and makes sure that
5348 * sockets get closed and the unix file for the socket are unlinked.
5350 void nwrap_destructor(void)
5355 if (nwrap_main_global != NULL) {
5356 struct nwrap_main *m = nwrap_main_global;
5359 SAFE_FREE(m->libc->fns);
5360 if (m->libc->handle != NULL) {
5361 dlclose(m->libc->handle);
5363 if (m->libc->nsl_handle != NULL) {
5364 dlclose(m->libc->nsl_handle);
5366 if (m->libc->sock_handle != NULL) {
5367 dlclose(m->libc->sock_handle);
5372 for (i = 0; i < m->num_backends; i++) {
5373 struct nwrap_backend *b = &(m->backends[i]);
5375 if (b->so_handle != NULL) {
5376 dlclose(b->so_handle);
5380 SAFE_FREE(m->backends);
5383 if (nwrap_pw_global.cache != NULL) {
5384 struct nwrap_cache *c = nwrap_pw_global.cache;
5386 nwrap_files_cache_unload(c);
5392 SAFE_FREE(nwrap_pw_global.list);
5393 nwrap_pw_global.num = 0;
5396 if (nwrap_gr_global.cache != NULL) {
5397 struct nwrap_cache *c = nwrap_gr_global.cache;
5399 nwrap_files_cache_unload(c);
5405 SAFE_FREE(nwrap_gr_global.list);
5406 nwrap_pw_global.num = 0;
5409 if (nwrap_he_global.cache != NULL) {
5410 struct nwrap_cache *c = nwrap_he_global.cache;
5412 nwrap_files_cache_unload(c);
5418 nwrap_he_global.num = 0;