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>
55 #include <netinet/in.h>
61 * Defining _POSIX_PTHREAD_SEMANTICS before including pwd.h and grp.h gives us
62 * the posix getpwnam_r(), getpwuid_r(), getgrnam_r and getgrgid_r calls on
65 #ifndef _POSIX_PTHREAD_SEMANTICS
66 #define _POSIX_PTHREAD_SEMANTICS
73 #endif /* HAVE_SHADOW_H */
76 #include <arpa/inet.h>
77 #include <netinet/in.h>
81 #if defined(HAVE_NSS_H)
85 typedef enum nss_status NSS_STATUS;
86 #elif defined(HAVE_NSS_COMMON_H)
88 #include <nss_common.h>
89 #include <nss_dbdefs.h>
92 typedef nss_status_t NSS_STATUS;
94 # define NSS_STATUS_SUCCESS NSS_SUCCESS
95 # define NSS_STATUS_NOTFOUND NSS_NOTFOUND
96 # define NSS_STATUS_UNAVAIL NSS_UNAVAIL
97 # define NSS_STATUS_TRYAGAIN NSS_TRYAGAIN
99 # error "No nsswitch support detected"
103 #define PTR_DIFF(p1, p2) ((ptrdiff_t)(((const char *)(p1)) - (const char *)(p2)))
111 #define EAI_NODATA EAI_NONAME
114 #ifndef EAI_ADDRFAMILY
115 #define EAI_ADDRFAMILY EAI_FAMILY
119 #define __STRING(x) #x
122 #ifndef __STRINGSTRING
123 #define __STRINGSTRING(x) __STRING(x)
127 #define __LINESTR__ __STRINGSTRING(__LINE__)
131 #define __location__ __FILE__ ":" __LINESTR__
135 #define DNS_NAME_MAX 255
138 /* GCC have printf type attribute check. */
139 #ifdef HAVE_ATTRIBUTE_PRINTF_FORMAT
140 #define PRINTF_ATTRIBUTE(a,b) __attribute__ ((__format__ (__printf__, a, b)))
142 #define PRINTF_ATTRIBUTE(a,b)
143 #endif /* HAVE_ATTRIBUTE_PRINTF_FORMAT */
145 #ifdef HAVE_DESTRUCTOR_ATTRIBUTE
146 #define DESTRUCTOR_ATTRIBUTE __attribute__ ((destructor))
148 #define DESTRUCTOR_ATTRIBUTE
149 #endif /* HAVE_DESTRUCTOR_ATTRIBUTE */
151 #define ZERO_STRUCTP(x) do { if ((x) != NULL) memset((char *)(x), 0, sizeof(*(x))); } while(0)
154 #define SAFE_FREE(x) do { if ((x) != NULL) {free(x); (x)=NULL;} } while(0)
158 #define NWRAP_INET_ADDRSTRLEN INET6_ADDRSTRLEN
160 #define NWRAP_INET_ADDRSTRLEN INET_ADDRSTRLEN
163 #define NWRAP_LOCK(m) do { \
164 pthread_mutex_lock(&( m ## _mutex)); \
167 #define NWRAP_UNLOCK(m) do { \
168 pthread_mutex_unlock(&( m ## _mutex)); \
172 static bool nwrap_initialized = false;
173 static pthread_mutex_t nwrap_initialized_mutex = PTHREAD_MUTEX_INITIALIZER;
175 /* The mutex or accessing the id */
176 static pthread_mutex_t nwrap_global_mutex = PTHREAD_MUTEX_INITIALIZER;
177 static pthread_mutex_t nwrap_gr_global_mutex = PTHREAD_MUTEX_INITIALIZER;
178 static pthread_mutex_t nwrap_he_global_mutex = PTHREAD_MUTEX_INITIALIZER;
179 static pthread_mutex_t nwrap_pw_global_mutex = PTHREAD_MUTEX_INITIALIZER;
180 static pthread_mutex_t nwrap_sp_global_mutex = PTHREAD_MUTEX_INITIALIZER;
182 /* Add new global locks here please */
183 /* Also don't forget to add locks to
184 * nwrap_init() function.
186 # define NWRAP_LOCK_ALL do { \
187 NWRAP_LOCK(nwrap_initialized); \
188 NWRAP_LOCK(nwrap_global); \
189 NWRAP_LOCK(nwrap_gr_global); \
190 NWRAP_LOCK(nwrap_he_global); \
191 NWRAP_LOCK(nwrap_pw_global); \
192 NWRAP_LOCK(nwrap_sp_global); \
195 # define NWRAP_UNLOCK_ALL do {\
196 NWRAP_UNLOCK(nwrap_sp_global); \
197 NWRAP_UNLOCK(nwrap_pw_global); \
198 NWRAP_UNLOCK(nwrap_he_global); \
199 NWRAP_UNLOCK(nwrap_gr_global); \
200 NWRAP_UNLOCK(nwrap_global); \
201 NWRAP_UNLOCK(nwrap_initialized); \
204 static void nwrap_thread_prepare(void)
209 static void nwrap_thread_parent(void)
214 static void nwrap_thread_child(void)
219 enum nwrap_dbglvl_e {
227 # define NWRAP_LOG(...)
230 static void nwrap_log(enum nwrap_dbglvl_e dbglvl, const char *func, const char *format, ...) PRINTF_ATTRIBUTE(3, 4);
231 # define NWRAP_LOG(dbglvl, ...) nwrap_log((dbglvl), __func__, __VA_ARGS__)
233 static void nwrap_log(enum nwrap_dbglvl_e dbglvl,
235 const char *format, ...)
240 unsigned int lvl = 0;
243 d = getenv("NSS_WRAPPER_DEBUGLEVEL");
248 va_start(va, format);
249 vsnprintf(buffer, sizeof(buffer), format, va);
254 case NWRAP_LOG_ERROR:
256 "NWRAP_ERROR(%d) - %s: %s\n",
261 "NWRAP_WARN(%d) - %s: %s\n",
264 case NWRAP_LOG_DEBUG:
266 "NWRAP_DEBUG(%d) - %s: %s\n",
269 case NWRAP_LOG_TRACE:
271 "NWRAP_TRACE(%d) - %s: %s\n",
277 #endif /* NDEBUG NWRAP_LOG */
279 struct nwrap_libc_fns {
280 struct passwd *(*_libc_getpwnam)(const char *name);
281 int (*_libc_getpwnam_r)(const char *name, struct passwd *pwd,
282 char *buf, size_t buflen, struct passwd **result);
283 struct passwd *(*_libc_getpwuid)(uid_t uid);
284 int (*_libc_getpwuid_r)(uid_t uid, struct passwd *pwd, char *buf, size_t buflen, struct passwd **result);
285 void (*_libc_setpwent)(void);
286 struct passwd *(*_libc_getpwent)(void);
287 #ifdef HAVE_SOLARIS_GETPWENT_R
288 struct passwd *(*_libc_getpwent_r)(struct passwd *pwbuf, char *buf, size_t buflen);
290 int (*_libc_getpwent_r)(struct passwd *pwbuf, char *buf, size_t buflen, struct passwd **pwbufp);
292 void (*_libc_endpwent)(void);
293 int (*_libc_initgroups)(const char *user, gid_t gid);
294 struct group *(*_libc_getgrnam)(const char *name);
295 int (*_libc_getgrnam_r)(const char *name, struct group *grp, char *buf, size_t buflen, struct group **result);
296 struct group *(*_libc_getgrgid)(gid_t gid);
297 int (*_libc_getgrgid_r)(gid_t gid, struct group *grp, char *buf, size_t buflen, struct group **result);
298 void (*_libc_setgrent)(void);
299 struct group *(*_libc_getgrent)(void);
300 #ifdef HAVE_SOLARIS_GETGRENT_R
301 struct group *(*_libc_getgrent_r)(struct group *group, char *buf, size_t buflen);
303 int (*_libc_getgrent_r)(struct group *group, char *buf, size_t buflen, struct group **result);
305 void (*_libc_endgrent)(void);
306 int (*_libc_getgrouplist)(const char *user, gid_t group, gid_t *groups, int *ngroups);
308 void (*_libc_sethostent)(int stayopen);
309 struct hostent *(*_libc_gethostent)(void);
310 void (*_libc_endhostent)(void);
312 struct hostent *(*_libc_gethostbyname)(const char *name);
313 #ifdef HAVE_GETHOSTBYNAME2 /* GNU extension */
314 struct hostent *(*_libc_gethostbyname2)(const char *name, int af);
316 struct hostent *(*_libc_gethostbyaddr)(const void *addr, socklen_t len, int type);
318 int (*_libc_getaddrinfo)(const char *node, const char *service,
319 const struct addrinfo *hints,
320 struct addrinfo **res);
321 int (*_libc_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
322 char *host, size_t hostlen,
323 char *serv, size_t servlen,
325 int (*_libc_gethostname)(char *name, size_t len);
326 #ifdef HAVE_GETHOSTBYNAME_R
327 int (*_libc_gethostbyname_r)(const char *name,
329 char *buf, size_t buflen,
330 struct hostent **result, int *h_errnop);
332 #ifdef HAVE_GETHOSTBYADDR_R
333 int (*_libc_gethostbyaddr_r)(const void *addr, socklen_t len, int type,
335 char *buf, size_t buflen,
336 struct hostent **result, int *h_errnop);
340 struct nwrap_module_nss_fns {
341 NSS_STATUS (*_nss_getpwnam_r)(const char *name, struct passwd *result, char *buffer,
342 size_t buflen, int *errnop);
343 NSS_STATUS (*_nss_getpwuid_r)(uid_t uid, struct passwd *result, char *buffer,
344 size_t buflen, int *errnop);
345 NSS_STATUS (*_nss_setpwent)(void);
346 NSS_STATUS (*_nss_getpwent_r)(struct passwd *result, char *buffer,
347 size_t buflen, int *errnop);
348 NSS_STATUS (*_nss_endpwent)(void);
349 NSS_STATUS (*_nss_initgroups)(const char *user, gid_t group, long int *start,
350 long int *size, gid_t **groups, long int limit, int *errnop);
351 NSS_STATUS (*_nss_getgrnam_r)(const char *name, struct group *result, char *buffer,
352 size_t buflen, int *errnop);
353 NSS_STATUS (*_nss_getgrgid_r)(gid_t gid, struct group *result, char *buffer,
354 size_t buflen, int *errnop);
355 NSS_STATUS (*_nss_setgrent)(void);
356 NSS_STATUS (*_nss_getgrent_r)(struct group *result, char *buffer,
357 size_t buflen, int *errnop);
358 NSS_STATUS (*_nss_endgrent)(void);
361 struct nwrap_backend {
365 struct nwrap_ops *ops;
366 struct nwrap_module_nss_fns *fns;
370 struct passwd * (*nw_getpwnam)(struct nwrap_backend *b,
372 int (*nw_getpwnam_r)(struct nwrap_backend *b,
373 const char *name, struct passwd *pwdst,
374 char *buf, size_t buflen, struct passwd **pwdstp);
375 struct passwd * (*nw_getpwuid)(struct nwrap_backend *b,
377 int (*nw_getpwuid_r)(struct nwrap_backend *b,
378 uid_t uid, struct passwd *pwdst,
379 char *buf, size_t buflen, struct passwd **pwdstp);
380 void (*nw_setpwent)(struct nwrap_backend *b);
381 struct passwd * (*nw_getpwent)(struct nwrap_backend *b);
382 int (*nw_getpwent_r)(struct nwrap_backend *b,
383 struct passwd *pwdst, char *buf,
384 size_t buflen, struct passwd **pwdstp);
385 void (*nw_endpwent)(struct nwrap_backend *b);
386 int (*nw_initgroups)(struct nwrap_backend *b,
387 const char *user, gid_t group);
388 struct group * (*nw_getgrnam)(struct nwrap_backend *b,
390 int (*nw_getgrnam_r)(struct nwrap_backend *b,
391 const char *name, struct group *grdst,
392 char *buf, size_t buflen, struct group **grdstp);
393 struct group * (*nw_getgrgid)(struct nwrap_backend *b,
395 int (*nw_getgrgid_r)(struct nwrap_backend *b,
396 gid_t gid, struct group *grdst,
397 char *buf, size_t buflen, struct group **grdstp);
398 void (*nw_setgrent)(struct nwrap_backend *b);
399 struct group * (*nw_getgrent)(struct nwrap_backend *b);
400 int (*nw_getgrent_r)(struct nwrap_backend *b,
401 struct group *grdst, char *buf,
402 size_t buflen, struct group **grdstp);
403 void (*nw_endgrent)(struct nwrap_backend *b);
406 /* Public prototypes */
408 bool nss_wrapper_enabled(void);
409 bool nss_wrapper_shadow_enabled(void);
410 bool nss_wrapper_hosts_enabled(void);
412 /* prototypes for files backend */
415 static struct passwd *nwrap_files_getpwnam(struct nwrap_backend *b,
417 static int nwrap_files_getpwnam_r(struct nwrap_backend *b,
418 const char *name, struct passwd *pwdst,
419 char *buf, size_t buflen, struct passwd **pwdstp);
420 static struct passwd *nwrap_files_getpwuid(struct nwrap_backend *b,
422 static int nwrap_files_getpwuid_r(struct nwrap_backend *b,
423 uid_t uid, struct passwd *pwdst,
424 char *buf, size_t buflen, struct passwd **pwdstp);
425 static void nwrap_files_setpwent(struct nwrap_backend *b);
426 static struct passwd *nwrap_files_getpwent(struct nwrap_backend *b);
427 static int nwrap_files_getpwent_r(struct nwrap_backend *b,
428 struct passwd *pwdst, char *buf,
429 size_t buflen, struct passwd **pwdstp);
430 static void nwrap_files_endpwent(struct nwrap_backend *b);
431 static int nwrap_files_initgroups(struct nwrap_backend *b,
432 const char *user, gid_t group);
433 static struct group *nwrap_files_getgrnam(struct nwrap_backend *b,
435 static int nwrap_files_getgrnam_r(struct nwrap_backend *b,
436 const char *name, struct group *grdst,
437 char *buf, size_t buflen, struct group **grdstp);
438 static struct group *nwrap_files_getgrgid(struct nwrap_backend *b,
440 static int nwrap_files_getgrgid_r(struct nwrap_backend *b,
441 gid_t gid, struct group *grdst,
442 char *buf, size_t buflen, struct group **grdstp);
443 static void nwrap_files_setgrent(struct nwrap_backend *b);
444 static struct group *nwrap_files_getgrent(struct nwrap_backend *b);
445 static int nwrap_files_getgrent_r(struct nwrap_backend *b,
446 struct group *grdst, char *buf,
447 size_t buflen, struct group **grdstp);
448 static void nwrap_files_endgrent(struct nwrap_backend *b);
450 /* prototypes for module backend */
452 static struct passwd *nwrap_module_getpwent(struct nwrap_backend *b);
453 static int nwrap_module_getpwent_r(struct nwrap_backend *b,
454 struct passwd *pwdst, char *buf,
455 size_t buflen, struct passwd **pwdstp);
456 static struct passwd *nwrap_module_getpwnam(struct nwrap_backend *b,
458 static int nwrap_module_getpwnam_r(struct nwrap_backend *b,
459 const char *name, struct passwd *pwdst,
460 char *buf, size_t buflen, struct passwd **pwdstp);
461 static struct passwd *nwrap_module_getpwuid(struct nwrap_backend *b,
463 static int nwrap_module_getpwuid_r(struct nwrap_backend *b,
464 uid_t uid, struct passwd *pwdst,
465 char *buf, size_t buflen, struct passwd **pwdstp);
466 static void nwrap_module_setpwent(struct nwrap_backend *b);
467 static void nwrap_module_endpwent(struct nwrap_backend *b);
468 static struct group *nwrap_module_getgrent(struct nwrap_backend *b);
469 static int nwrap_module_getgrent_r(struct nwrap_backend *b,
470 struct group *grdst, char *buf,
471 size_t buflen, struct group **grdstp);
472 static struct group *nwrap_module_getgrnam(struct nwrap_backend *b,
474 static int nwrap_module_getgrnam_r(struct nwrap_backend *b,
475 const char *name, struct group *grdst,
476 char *buf, size_t buflen, struct group **grdstp);
477 static struct group *nwrap_module_getgrgid(struct nwrap_backend *b,
479 static int nwrap_module_getgrgid_r(struct nwrap_backend *b,
480 gid_t gid, struct group *grdst,
481 char *buf, size_t buflen, struct group **grdstp);
482 static void nwrap_module_setgrent(struct nwrap_backend *b);
483 static void nwrap_module_endgrent(struct nwrap_backend *b);
484 static int nwrap_module_initgroups(struct nwrap_backend *b,
485 const char *user, gid_t group);
487 struct nwrap_ops nwrap_files_ops = {
488 .nw_getpwnam = nwrap_files_getpwnam,
489 .nw_getpwnam_r = nwrap_files_getpwnam_r,
490 .nw_getpwuid = nwrap_files_getpwuid,
491 .nw_getpwuid_r = nwrap_files_getpwuid_r,
492 .nw_setpwent = nwrap_files_setpwent,
493 .nw_getpwent = nwrap_files_getpwent,
494 .nw_getpwent_r = nwrap_files_getpwent_r,
495 .nw_endpwent = nwrap_files_endpwent,
496 .nw_initgroups = nwrap_files_initgroups,
497 .nw_getgrnam = nwrap_files_getgrnam,
498 .nw_getgrnam_r = nwrap_files_getgrnam_r,
499 .nw_getgrgid = nwrap_files_getgrgid,
500 .nw_getgrgid_r = nwrap_files_getgrgid_r,
501 .nw_setgrent = nwrap_files_setgrent,
502 .nw_getgrent = nwrap_files_getgrent,
503 .nw_getgrent_r = nwrap_files_getgrent_r,
504 .nw_endgrent = nwrap_files_endgrent,
507 struct nwrap_ops nwrap_module_ops = {
508 .nw_getpwnam = nwrap_module_getpwnam,
509 .nw_getpwnam_r = nwrap_module_getpwnam_r,
510 .nw_getpwuid = nwrap_module_getpwuid,
511 .nw_getpwuid_r = nwrap_module_getpwuid_r,
512 .nw_setpwent = nwrap_module_setpwent,
513 .nw_getpwent = nwrap_module_getpwent,
514 .nw_getpwent_r = nwrap_module_getpwent_r,
515 .nw_endpwent = nwrap_module_endpwent,
516 .nw_initgroups = nwrap_module_initgroups,
517 .nw_getgrnam = nwrap_module_getgrnam,
518 .nw_getgrnam_r = nwrap_module_getgrnam_r,
519 .nw_getgrgid = nwrap_module_getgrgid,
520 .nw_getgrgid_r = nwrap_module_getgrgid_r,
521 .nw_setgrent = nwrap_module_setgrent,
522 .nw_getgrent = nwrap_module_getgrent,
523 .nw_getgrent_r = nwrap_module_getgrent_r,
524 .nw_endgrent = nwrap_module_endgrent,
531 struct nwrap_libc_fns *fns;
536 struct nwrap_backend *backends;
537 struct nwrap_libc *libc;
540 static struct nwrap_main *nwrap_main_global;
541 static struct nwrap_main __nwrap_main_global;
546 static int nwrap_convert_he_ai(const struct hostent *he,
548 const struct addrinfo *hints,
549 struct addrinfo **pai,
550 bool skip_canonname);
556 #define DEFAULT_VECTOR_CAPACITY 16
558 struct nwrap_vector {
564 /* Macro returns pointer to first element of vector->items array.
566 * nwrap_vector is used as a memory backend which take care of
567 * memory allocations and other stuff like memory growing.
568 * nwrap_vectors should not be considered as some abstract structures.
569 * On this level, vectors are more handy than direct realloc/malloc
572 * nwrap_vector->items is array inside nwrap_vector which can be
573 * directly pointed by libc structure assembled by cwrap itself.
577 * 1) struct hostent contains char **h_addr_list element.
578 * 2) nwrap_vector holds array of pointers to addresses.
579 * It's easier to use vector to store results of
582 * Now, pretend that cwrap assembled struct hostent and
583 * we need to set h_addr_list to point to nwrap_vector.
584 * Idea behind is to shield users from internal nwrap_vector
586 * (Yes, not fully - array terminated by NULL is needed because
587 * it's result expected by libc function caller.)
593 * struct nwrap_vector *vector = malloc(sizeof(struct nwrap_vector));
594 * ... don't care about failed allocation now ...
596 * ... fill nwrap vector ...
599 * he.h_addr_list = nwrap_vector_head(vector);
602 #define nwrap_vector_head(vect) ((void *)((vect)->items))
604 #define nwrap_vector_foreach(item, vect, iter) \
605 for (iter = 0, (item) = (vect).items == NULL ? NULL : (vect).items[0]; \
607 (item) = (vect).items[++iter])
609 #define nwrap_vector_is_initialized(vector) ((vector)->items != NULL)
611 static inline bool nwrap_vector_init(struct nwrap_vector *const vector)
613 if (vector == NULL) {
617 /* count is initialized by ZERO_STRUCTP */
618 ZERO_STRUCTP(vector);
619 vector->items = malloc(sizeof(void *) * (DEFAULT_VECTOR_CAPACITY + 1));
620 if (vector->items == NULL) {
623 vector->capacity = DEFAULT_VECTOR_CAPACITY;
624 memset(vector->items, '\0', sizeof(void *) * (DEFAULT_VECTOR_CAPACITY + 1));
629 static bool nwrap_vector_add_item(struct nwrap_vector *vector, void *const item)
631 assert (vector != NULL);
633 if (vector->items == NULL) {
634 nwrap_vector_init(vector);
637 if (vector->count == vector->capacity) {
638 /* Items array _MUST_ be NULL terminated because it's passed
639 * as result to caller which expect NULL terminated array from libc.
641 void **items = realloc(vector->items, sizeof(void *) * ((vector->capacity * 2) + 1));
645 vector->items = items;
647 /* Don't count ending NULL to capacity */
648 vector->capacity *= 2;
651 vector->items[vector->count] = item;
654 vector->items[vector->count] = NULL;
659 static bool nwrap_vector_merge(struct nwrap_vector *dst,
660 struct nwrap_vector *src)
662 void **dst_items = NULL;
665 if (src->count == 0) {
669 count = dst->count + src->count;
671 /* We don't need reallocation if we have enough capacity. */
672 if (src->count > (dst->capacity - dst->count)) {
673 dst_items = (void **)realloc(dst->items, (count + 1) * sizeof(void *));
674 if (dst_items == NULL) {
677 dst->items = dst_items;
678 dst->capacity = count;
681 memcpy((void *)(((long *)dst->items) + dst->count),
683 src->count * sizeof(void *));
696 struct nwrap_vector lines;
698 bool (*parse_line)(struct nwrap_cache *, char *line);
699 void (*unload)(struct nwrap_cache *);
704 struct nwrap_cache *cache;
711 struct nwrap_cache __nwrap_cache_pw;
712 struct nwrap_pw nwrap_pw_global;
714 static bool nwrap_pw_parse_line(struct nwrap_cache *nwrap, char *line);
715 static void nwrap_pw_unload(struct nwrap_cache *nwrap);
718 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
720 struct nwrap_cache *cache;
727 struct nwrap_cache __nwrap_cache_sp;
728 struct nwrap_sp nwrap_sp_global;
730 static bool nwrap_sp_parse_line(struct nwrap_cache *nwrap, char *line);
731 static void nwrap_sp_unload(struct nwrap_cache *nwrap);
732 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
736 struct nwrap_cache *cache;
743 struct nwrap_cache __nwrap_cache_gr;
744 struct nwrap_gr nwrap_gr_global;
747 static bool nwrap_he_parse_line(struct nwrap_cache *nwrap, char *line);
748 static void nwrap_he_unload(struct nwrap_cache *nwrap);
750 struct nwrap_addrdata {
751 unsigned char host_addr[16]; /* IPv4 or IPv6 address */
754 static size_t max_hostents = 100;
756 struct nwrap_entdata {
757 struct nwrap_addrdata addr;
760 struct nwrap_vector nwrap_addrdata;
762 ssize_t aliases_count;
765 struct nwrap_entlist {
766 struct nwrap_entlist *next;
767 struct nwrap_entdata *ed;
771 struct nwrap_cache *cache;
773 struct nwrap_entdata *list;
774 struct nwrap_vector entdata;
780 static struct nwrap_cache __nwrap_cache_he;
781 static struct nwrap_he nwrap_he_global;
784 /*********************************************************
786 *********************************************************/
788 static void nwrap_init(void);
789 static bool nwrap_gr_parse_line(struct nwrap_cache *nwrap, char *line);
790 static void nwrap_gr_unload(struct nwrap_cache *nwrap);
791 void nwrap_destructor(void) DESTRUCTOR_ATTRIBUTE;
793 /*********************************************************
794 * NWRAP LIBC LOADER FUNCTIONS
795 *********************************************************/
804 static const char *nwrap_str_lib(enum nwrap_lib lib)
811 case NWRAP_LIBSOCKET:
815 /* Compiler would warn us about unhandled enum value if we get here */
820 static void *nwrap_load_lib_handle(enum nwrap_lib lib)
822 int flags = RTLD_LAZY;
827 flags |= RTLD_DEEPBIND;
833 handle = nwrap_main_global->libc->nsl_handle;
834 if (handle == NULL) {
835 for (i = 10; i >= 0; i--) {
836 char soname[256] = {0};
838 snprintf(soname, sizeof(soname), "libnsl.so.%d", i);
839 handle = dlopen(soname, flags);
840 if (handle != NULL) {
845 nwrap_main_global->libc->nsl_handle = handle;
850 case NWRAP_LIBSOCKET:
851 #ifdef HAVE_LIBSOCKET
852 handle = nwrap_main_global->libc->sock_handle;
853 if (handle == NULL) {
854 for (i = 10; i >= 0; i--) {
855 char soname[256] = {0};
857 snprintf(soname, sizeof(soname), "libsocket.so.%d", i);
858 handle = dlopen(soname, flags);
859 if (handle != NULL) {
864 nwrap_main_global->libc->sock_handle = handle;
870 handle = nwrap_main_global->libc->handle;
871 if (handle == NULL) {
872 for (i = 10; i >= 0; i--) {
873 char soname[256] = {0};
875 snprintf(soname, sizeof(soname), "libc.so.%d", i);
876 handle = dlopen(soname, flags);
877 if (handle != NULL) {
882 nwrap_main_global->libc->handle = handle;
887 if (handle == NULL) {
889 handle = nwrap_main_global->libc->handle
890 = nwrap_main_global->libc->sock_handle
891 = nwrap_main_global->libc->nsl_handle
894 NWRAP_LOG(NWRAP_LOG_ERROR,
895 "Failed to dlopen library: %s\n",
904 static void *_nwrap_load_lib_function(enum nwrap_lib lib, const char *fn_name)
911 handle = nwrap_load_lib_handle(lib);
913 func = dlsym(handle, fn_name);
915 NWRAP_LOG(NWRAP_LOG_ERROR,
916 "Failed to find %s: %s\n",
921 NWRAP_LOG(NWRAP_LOG_TRACE,
923 fn_name, nwrap_str_lib(lib));
927 #define nwrap_load_lib_function(lib, fn_name) \
928 if (nwrap_main_global->libc->fns->_libc_##fn_name == NULL) { \
929 *(void **) (&nwrap_main_global->libc->fns->_libc_##fn_name) = \
930 _nwrap_load_lib_function(lib, #fn_name); \
933 /* INTERNAL HELPER FUNCTIONS */
934 static void nwrap_lines_unload(struct nwrap_cache *const nwrap)
938 nwrap_vector_foreach(item, nwrap->lines, p) {
939 /* Maybe some vectors were merged ... */
942 SAFE_FREE(nwrap->lines.items);
943 ZERO_STRUCTP(&nwrap->lines);
949 * Functions expeciall from libc need to be loaded individually, you can't load
950 * all at once or gdb will segfault at startup. The same applies to valgrind and
951 * has probably something todo with with the linker.
952 * So we need load each function at the point it is called the first time.
954 static struct passwd *libc_getpwnam(const char *name)
956 nwrap_load_lib_function(NWRAP_LIBC, getpwnam);
958 return nwrap_main_global->libc->fns->_libc_getpwnam(name);
961 #ifdef HAVE_GETPWNAM_R
962 static int libc_getpwnam_r(const char *name,
966 struct passwd **result)
968 #ifdef HAVE___POSIX_GETPWNAM_R
969 if (nwrap_main_global->libc->fns->_libc_getpwnam_r == NULL) {
970 *(void **) (&nwrap_main_global->libc->fns->_libc_getpwnam_r) =
971 _nwrap_load_lib_function(NWRAP_LIBC, "__posix_getpwnam_r");
974 nwrap_load_lib_function(NWRAP_LIBC, getpwnam_r);
977 return nwrap_main_global->libc->fns->_libc_getpwnam_r(name,
985 static struct passwd *libc_getpwuid(uid_t uid)
987 nwrap_load_lib_function(NWRAP_LIBC, getpwuid);
989 return nwrap_main_global->libc->fns->_libc_getpwuid(uid);
992 #ifdef HAVE_GETPWUID_R
993 static int libc_getpwuid_r(uid_t uid,
997 struct passwd **result)
999 #ifdef HAVE___POSIX_GETPWUID_R
1000 if (nwrap_main_global->libc->fns->_libc_getpwuid_r == NULL) {
1001 *(void **) (&nwrap_main_global->libc->fns->_libc_getpwuid_r) =
1002 _nwrap_load_lib_function(NWRAP_LIBC, "__posix_getpwuid_r");
1005 nwrap_load_lib_function(NWRAP_LIBC, getpwuid_r);
1008 return nwrap_main_global->libc->fns->_libc_getpwuid_r(uid,
1016 static inline void str_tolower(char *dst, char *src)
1018 register char *src_tmp = src;
1019 register char *dst_tmp = dst;
1021 while (*src_tmp != '\0') {
1022 *dst_tmp = tolower(*src_tmp);
1028 static bool str_tolower_copy(char **dst_name, const char *const src_name)
1032 if ((dst_name == NULL) || (src_name == NULL)) {
1036 h_name_lower = strdup(src_name);
1037 if (h_name_lower == NULL) {
1038 NWRAP_LOG(NWRAP_LOG_DEBUG, "Out of memory while strdup");
1042 str_tolower(h_name_lower, h_name_lower);
1043 *dst_name = h_name_lower;
1047 static void libc_setpwent(void)
1049 nwrap_load_lib_function(NWRAP_LIBC, setpwent);
1051 nwrap_main_global->libc->fns->_libc_setpwent();
1054 static struct passwd *libc_getpwent(void)
1056 nwrap_load_lib_function(NWRAP_LIBC, getpwent);
1058 return nwrap_main_global->libc->fns->_libc_getpwent();
1061 #ifdef HAVE_SOLARIS_GETPWENT_R
1062 static struct passwd *libc_getpwent_r(struct passwd *pwdst,
1066 nwrap_load_lib_function(NWRAP_LIBC, getpwent_r);
1068 return nwrap_main_global->libc->fns->_libc_getpwent_r(pwdst,
1072 #else /* HAVE_SOLARIS_GETPWENT_R */
1073 static int libc_getpwent_r(struct passwd *pwdst,
1076 struct passwd **pwdstp)
1078 nwrap_load_lib_function(NWRAP_LIBC, getpwent_r);
1080 return nwrap_main_global->libc->fns->_libc_getpwent_r(pwdst,
1085 #endif /* HAVE_SOLARIS_GETPWENT_R */
1087 static void libc_endpwent(void)
1089 nwrap_load_lib_function(NWRAP_LIBC, endpwent);
1091 nwrap_main_global->libc->fns->_libc_endpwent();
1094 static int libc_initgroups(const char *user, gid_t gid)
1096 nwrap_load_lib_function(NWRAP_LIBC, initgroups);
1098 return nwrap_main_global->libc->fns->_libc_initgroups(user, gid);
1101 static struct group *libc_getgrnam(const char *name)
1103 nwrap_load_lib_function(NWRAP_LIBC, getgrnam);
1105 return nwrap_main_global->libc->fns->_libc_getgrnam(name);
1108 #ifdef HAVE_GETGRNAM_R
1109 static int libc_getgrnam_r(const char *name,
1113 struct group **result)
1115 #ifdef HAVE___POSIX_GETGRNAM_R
1116 if (nwrap_main_global->libc->fns->_libc_getgrnam_r == NULL) {
1117 *(void **) (&nwrap_main_global->libc->fns->_libc_getgrnam_r) =
1118 _nwrap_load_lib_function(NWRAP_LIBC, "__posix_getgrnam_r");
1121 nwrap_load_lib_function(NWRAP_LIBC, getgrnam_r);
1124 return nwrap_main_global->libc->fns->_libc_getgrnam_r(name,
1132 static struct group *libc_getgrgid(gid_t gid)
1134 nwrap_load_lib_function(NWRAP_LIBC, getgrgid);
1136 return nwrap_main_global->libc->fns->_libc_getgrgid(gid);
1139 #ifdef HAVE_GETGRGID_R
1140 static int libc_getgrgid_r(gid_t gid,
1144 struct group **result)
1146 #ifdef HAVE___POSIX_GETGRGID_R
1147 if (nwrap_main_global->libc->fns->_libc_getgrgid_r == NULL) {
1148 *(void **) (&nwrap_main_global->libc->fns->_libc_getgrgid_r) =
1149 _nwrap_load_lib_function(NWRAP_LIBC, "__posix_getgrgid_r");
1152 nwrap_load_lib_function(NWRAP_LIBC, getgrgid_r);
1155 return nwrap_main_global->libc->fns->_libc_getgrgid_r(gid,
1163 static void libc_setgrent(void)
1165 nwrap_load_lib_function(NWRAP_LIBC, setgrent);
1167 nwrap_main_global->libc->fns->_libc_setgrent();
1170 static struct group *libc_getgrent(void)
1172 nwrap_load_lib_function(NWRAP_LIBC, getgrent);
1174 return nwrap_main_global->libc->fns->_libc_getgrent();
1177 #ifdef HAVE_GETGRENT_R
1178 #ifdef HAVE_SOLARIS_GETGRENT_R
1179 static struct group *libc_getgrent_r(struct group *group,
1183 nwrap_load_lib_function(NWRAP_LIBC, getgrent_r);
1185 return nwrap_main_global->libc->fns->_libc_getgrent_r(group,
1189 #else /* !HAVE_SOLARIS_GETGRENT_R */
1190 static int libc_getgrent_r(struct group *group,
1193 struct group **result)
1195 nwrap_load_lib_function(NWRAP_LIBC, getgrent_r);
1197 return nwrap_main_global->libc->fns->_libc_getgrent_r(group,
1202 #endif /* HAVE_SOLARIS_GETGRENT_R */
1203 #endif /* HAVE_GETGRENT_R */
1205 static void libc_endgrent(void)
1207 nwrap_load_lib_function(NWRAP_LIBC, endgrent);
1209 nwrap_main_global->libc->fns->_libc_endgrent();
1212 #ifdef HAVE_GETGROUPLIST
1213 static int libc_getgrouplist(const char *user,
1218 nwrap_load_lib_function(NWRAP_LIBC, getgrouplist);
1220 return nwrap_main_global->libc->fns->_libc_getgrouplist(user,
1227 static void libc_sethostent(int stayopen)
1229 nwrap_load_lib_function(NWRAP_LIBNSL, sethostent);
1231 nwrap_main_global->libc->fns->_libc_sethostent(stayopen);
1234 static struct hostent *libc_gethostent(void)
1236 nwrap_load_lib_function(NWRAP_LIBNSL, gethostent);
1238 return nwrap_main_global->libc->fns->_libc_gethostent();
1241 static void libc_endhostent(void)
1243 nwrap_load_lib_function(NWRAP_LIBNSL, endhostent);
1245 nwrap_main_global->libc->fns->_libc_endhostent();
1248 static struct hostent *libc_gethostbyname(const char *name)
1250 nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyname);
1252 return nwrap_main_global->libc->fns->_libc_gethostbyname(name);
1255 #ifdef HAVE_GETHOSTBYNAME2 /* GNU extension */
1256 static struct hostent *libc_gethostbyname2(const char *name, int af)
1258 nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyname2);
1260 return nwrap_main_global->libc->fns->_libc_gethostbyname2(name, af);
1264 static struct hostent *libc_gethostbyaddr(const void *addr,
1268 nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyaddr);
1270 return nwrap_main_global->libc->fns->_libc_gethostbyaddr(addr,
1275 static int libc_gethostname(char *name, size_t len)
1277 nwrap_load_lib_function(NWRAP_LIBNSL, gethostname);
1279 return nwrap_main_global->libc->fns->_libc_gethostname(name, len);
1282 #ifdef HAVE_GETHOSTBYNAME_R
1283 static int libc_gethostbyname_r(const char *name,
1284 struct hostent *ret,
1287 struct hostent **result,
1290 nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyname_r);
1292 return nwrap_main_global->libc->fns->_libc_gethostbyname_r(name,
1301 #ifdef HAVE_GETHOSTBYADDR_R
1302 static int libc_gethostbyaddr_r(const void *addr,
1305 struct hostent *ret,
1308 struct hostent **result,
1311 nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyaddr_r);
1313 return nwrap_main_global->libc->fns->_libc_gethostbyaddr_r(addr,
1324 static int libc_getaddrinfo(const char *node,
1325 const char *service,
1326 const struct addrinfo *hints,
1327 struct addrinfo **res)
1329 nwrap_load_lib_function(NWRAP_LIBSOCKET, getaddrinfo);
1331 return nwrap_main_global->libc->fns->_libc_getaddrinfo(node,
1337 static int libc_getnameinfo(const struct sockaddr *sa,
1345 nwrap_load_lib_function(NWRAP_LIBSOCKET, getnameinfo);
1347 return nwrap_main_global->libc->fns->_libc_getnameinfo(sa,
1356 /*********************************************************
1357 * NWRAP NSS MODULE LOADER FUNCTIONS
1358 *********************************************************/
1360 static void *nwrap_load_module_fn(struct nwrap_backend *b,
1361 const char *fn_name)
1366 if (!b->so_handle) {
1367 NWRAP_LOG(NWRAP_LOG_ERROR, "No handle");
1371 if (asprintf(&s, "_nss_%s_%s", b->name, fn_name) == -1) {
1372 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
1376 res = dlsym(b->so_handle, s);
1378 NWRAP_LOG(NWRAP_LOG_ERROR,
1379 "Cannot find function %s in %s",
1386 static struct nwrap_module_nss_fns *nwrap_load_module_fns(struct nwrap_backend *b)
1388 struct nwrap_module_nss_fns *fns;
1390 if (!b->so_handle) {
1394 fns = (struct nwrap_module_nss_fns *)malloc(sizeof(struct nwrap_module_nss_fns));
1399 *(void **)(&fns->_nss_getpwnam_r) =
1400 nwrap_load_module_fn(b, "getpwnam_r");
1401 *(void **)(&fns->_nss_getpwuid_r) =
1402 nwrap_load_module_fn(b, "getpwuid_r");
1403 *(void **)(&fns->_nss_setpwent) =
1404 nwrap_load_module_fn(b, "setpwent");
1405 *(void **)(&fns->_nss_getpwent_r) =
1406 nwrap_load_module_fn(b, "getpwent_r");
1407 *(void **)(&fns->_nss_endpwent) =
1408 nwrap_load_module_fn(b, "endpwent");
1409 *(void **)(&fns->_nss_initgroups) =
1410 nwrap_load_module_fn(b, "initgroups_dyn");
1411 *(void **)(&fns->_nss_getgrnam_r) =
1412 nwrap_load_module_fn(b, "getgrnam_r");
1413 *(void **)(&fns->_nss_getgrgid_r)=
1414 nwrap_load_module_fn(b, "getgrgid_r");
1415 *(void **)(&fns->_nss_setgrent) =
1416 nwrap_load_module_fn(b, "setgrent");
1417 *(void **)(&fns->_nss_getgrent_r) =
1418 nwrap_load_module_fn(b, "getgrent_r");
1419 *(void **)(&fns->_nss_endgrent) =
1420 nwrap_load_module_fn(b, "endgrent");
1425 static void *nwrap_load_module(const char *so_path)
1429 if (!so_path || !strlen(so_path)) {
1433 h = dlopen(so_path, RTLD_LAZY);
1435 NWRAP_LOG(NWRAP_LOG_ERROR,
1436 "Cannot open shared library %s",
1444 static bool nwrap_module_init(const char *name,
1445 struct nwrap_ops *ops,
1446 const char *so_path,
1448 struct nwrap_backend **backends)
1450 struct nwrap_backend *b;
1452 *backends = (struct nwrap_backend *)realloc(*backends,
1453 sizeof(struct nwrap_backend) * ((*num_backends) + 1));
1455 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
1459 b = &((*backends)[*num_backends]);
1463 b->so_path = so_path;
1465 if (so_path != NULL) {
1466 b->so_handle = nwrap_load_module(so_path);
1467 b->fns = nwrap_load_module_fns(b);
1468 if (b->fns == NULL) {
1472 b->so_handle = NULL;
1481 static void nwrap_libc_init(struct nwrap_main *r)
1483 r->libc = malloc(sizeof(struct nwrap_libc));
1484 if (r->libc == NULL) {
1485 printf("Failed to allocate memory for libc");
1488 ZERO_STRUCTP(r->libc);
1490 r->libc->fns = malloc(sizeof(struct nwrap_libc_fns));
1491 if (r->libc->fns == NULL) {
1492 printf("Failed to allocate memory for libc functions");
1495 ZERO_STRUCTP(r->libc->fns);
1498 static void nwrap_backend_init(struct nwrap_main *r)
1500 const char *module_so_path = getenv("NSS_WRAPPER_MODULE_SO_PATH");
1501 const char *module_fn_name = getenv("NSS_WRAPPER_MODULE_FN_PREFIX");
1503 r->num_backends = 0;
1506 if (!nwrap_module_init("files", &nwrap_files_ops, NULL,
1509 NWRAP_LOG(NWRAP_LOG_ERROR,
1510 "Failed to initialize 'files' backend");
1514 if (module_so_path != NULL &&
1515 module_so_path[0] != '\0' &&
1516 module_fn_name != NULL &&
1517 module_fn_name[0] != '\0') {
1518 if (!nwrap_module_init(module_fn_name,
1523 NWRAP_LOG(NWRAP_LOG_ERROR,
1524 "Failed to initialize '%s' backend",
1531 static void nwrap_init(void)
1535 size_t max_hostents_tmp;
1537 NWRAP_LOCK(nwrap_initialized);
1538 if (nwrap_initialized) {
1539 NWRAP_UNLOCK(nwrap_initialized);
1544 * Still holding nwrap_initialized lock here.
1545 * We don't use NWRAP_(UN)LOCK_ALL macros here because we
1546 * want to avoid overhead when other threads do their job.
1548 NWRAP_LOCK(nwrap_global);
1549 NWRAP_LOCK(nwrap_gr_global);
1550 NWRAP_LOCK(nwrap_he_global);
1551 NWRAP_LOCK(nwrap_pw_global);
1552 NWRAP_LOCK(nwrap_sp_global);
1554 nwrap_initialized = true;
1556 /* Initialize pthread_atfork handlers */
1557 pthread_atfork(&nwrap_thread_prepare, &nwrap_thread_parent,
1558 &nwrap_thread_child);
1560 env = getenv("NSS_WRAPPER_MAX_HOSTENTS");
1562 max_hostents_tmp = (size_t)strtol(env, &endptr, 10);
1563 if (((env != '\0') && (endptr == '\0')) ||
1564 (max_hostents_tmp == 0)) {
1565 NWRAP_LOG(NWRAP_LOG_DEBUG,
1566 "Error parsing NSS_WRAPPER_MAX_HOSTENTS "
1567 "value or value is too small. "
1568 "Using default value: %lu.",
1569 (unsigned long)max_hostents);
1571 max_hostents = max_hostents_tmp;
1574 /* Initialize hash table */
1575 NWRAP_LOG(NWRAP_LOG_DEBUG,
1576 "Initializing hash table of size %lu items.",
1577 (unsigned long)max_hostents);
1578 if (hcreate(max_hostents) == 0) {
1579 NWRAP_LOG(NWRAP_LOG_ERROR,
1580 "Failed to initialize hash table");
1584 nwrap_main_global = &__nwrap_main_global;
1586 nwrap_libc_init(nwrap_main_global);
1588 nwrap_backend_init(nwrap_main_global);
1591 nwrap_pw_global.cache = &__nwrap_cache_pw;
1593 nwrap_pw_global.cache->path = getenv("NSS_WRAPPER_PASSWD");
1594 nwrap_pw_global.cache->fp = NULL;
1595 nwrap_pw_global.cache->fd = -1;
1596 nwrap_pw_global.cache->private_data = &nwrap_pw_global;
1597 nwrap_pw_global.cache->parse_line = nwrap_pw_parse_line;
1598 nwrap_pw_global.cache->unload = nwrap_pw_unload;
1601 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
1602 nwrap_sp_global.cache = &__nwrap_cache_sp;
1604 nwrap_sp_global.cache->path = getenv("NSS_WRAPPER_SHADOW");
1605 nwrap_sp_global.cache->fp = NULL;
1606 nwrap_sp_global.cache->fd = -1;
1607 nwrap_sp_global.cache->private_data = &nwrap_sp_global;
1608 nwrap_sp_global.cache->parse_line = nwrap_sp_parse_line;
1609 nwrap_sp_global.cache->unload = nwrap_sp_unload;
1610 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
1613 nwrap_gr_global.cache = &__nwrap_cache_gr;
1615 nwrap_gr_global.cache->path = getenv("NSS_WRAPPER_GROUP");
1616 nwrap_gr_global.cache->fp = NULL;
1617 nwrap_gr_global.cache->fd = -1;
1618 nwrap_gr_global.cache->private_data = &nwrap_gr_global;
1619 nwrap_gr_global.cache->parse_line = nwrap_gr_parse_line;
1620 nwrap_gr_global.cache->unload = nwrap_gr_unload;
1623 nwrap_he_global.cache = &__nwrap_cache_he;
1625 nwrap_he_global.cache->path = getenv("NSS_WRAPPER_HOSTS");
1626 nwrap_he_global.cache->fp = NULL;
1627 nwrap_he_global.cache->fd = -1;
1628 nwrap_he_global.cache->private_data = &nwrap_he_global;
1629 nwrap_he_global.cache->parse_line = nwrap_he_parse_line;
1630 nwrap_he_global.cache->unload = nwrap_he_unload;
1633 /* We hold all locks here so we can use NWRAP_UNLOCK_ALL. */
1637 bool nss_wrapper_enabled(void)
1641 if (nwrap_pw_global.cache->path == NULL ||
1642 nwrap_pw_global.cache->path[0] == '\0') {
1645 if (nwrap_gr_global.cache->path == NULL ||
1646 nwrap_gr_global.cache->path[0] == '\0') {
1653 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
1654 bool nss_wrapper_shadow_enabled(void)
1658 if (nwrap_sp_global.cache->path == NULL ||
1659 nwrap_sp_global.cache->path[0] == '\0') {
1665 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
1667 bool nss_wrapper_hosts_enabled(void)
1671 if (nwrap_he_global.cache->path == NULL ||
1672 nwrap_he_global.cache->path[0] == '\0') {
1679 static bool nwrap_hostname_enabled(void)
1683 if (getenv("NSS_WRAPPER_HOSTNAME") == NULL) {
1690 static bool nwrap_parse_file(struct nwrap_cache *nwrap)
1694 /* Unused but getline needs it */
1698 if (nwrap->st.st_size == 0) {
1699 NWRAP_LOG(NWRAP_LOG_DEBUG, "size == 0");
1703 /* Support for 32-bit system I guess */
1704 if (nwrap->st.st_size > INT32_MAX) {
1705 NWRAP_LOG(NWRAP_LOG_ERROR,
1706 "Size[%u] larger than INT32_MAX",
1707 (unsigned)nwrap->st.st_size);
1714 n = getline(&line, &len, nwrap->fp);
1717 if (feof(nwrap->fp)) {
1721 NWRAP_LOG(NWRAP_LOG_ERROR,
1722 "Unable to read line from file: %s",
1727 if (line[n - 1] == '\n') {
1731 if (line[0] == '\0') {
1736 ok = nwrap->parse_line(nwrap, line);
1738 NWRAP_LOG(NWRAP_LOG_ERROR,
1739 "Unable to parse line file: %s",
1745 /* Line is parsed without issues so add it to list */
1746 ok = nwrap_vector_add_item(&(nwrap->lines), (void *const) line);
1748 NWRAP_LOG(NWRAP_LOG_ERROR,
1749 "Unable to add line to vector");
1753 /* This forces getline to allocate new memory for line. */
1755 } while (!feof(nwrap->fp));
1760 static void nwrap_files_cache_unload(struct nwrap_cache *nwrap)
1762 nwrap->unload(nwrap);
1764 nwrap_lines_unload(nwrap);
1767 static bool nwrap_files_cache_reload(struct nwrap_cache *nwrap)
1772 bool retried = false;
1774 assert(nwrap != NULL);
1777 if (nwrap->fd < 0) {
1778 nwrap->fp = fopen(nwrap->path, "re");
1779 if (nwrap->fp == NULL) {
1781 NWRAP_LOG(NWRAP_LOG_ERROR,
1782 "Unable to open '%s' readonly %d:%s",
1783 nwrap->path, nwrap->fd,
1788 nwrap->fd = fileno(nwrap->fp);
1789 NWRAP_LOG(NWRAP_LOG_DEBUG, "Open '%s'", nwrap->path);
1792 ret = fstat(nwrap->fd, &st);
1794 NWRAP_LOG(NWRAP_LOG_ERROR,
1795 "fstat(%s) - %d:%s",
1805 if (retried == false && st.st_nlink == 0) {
1806 /* maybe someone has replaced the file... */
1807 NWRAP_LOG(NWRAP_LOG_TRACE,
1808 "st_nlink == 0, reopen %s",
1811 memset(&nwrap->st, 0, sizeof(nwrap->st));
1818 if (st.st_mtime == nwrap->st.st_mtime) {
1819 NWRAP_LOG(NWRAP_LOG_TRACE,
1820 "st_mtime[%u] hasn't changed, skip reload",
1821 (unsigned)st.st_mtime);
1825 NWRAP_LOG(NWRAP_LOG_TRACE,
1826 "st_mtime has changed [%u] => [%u], start reload",
1827 (unsigned)st.st_mtime,
1828 (unsigned)nwrap->st.st_mtime);
1832 nwrap_files_cache_unload(nwrap);
1834 ok = nwrap_parse_file(nwrap);
1836 NWRAP_LOG(NWRAP_LOG_ERROR, "Failed to reload %s", nwrap->path);
1837 nwrap_files_cache_unload(nwrap);
1841 NWRAP_LOG(NWRAP_LOG_TRACE, "Reloaded %s", nwrap->path);
1846 * the caller has to call nwrap_unload() on failure
1848 static bool nwrap_pw_parse_line(struct nwrap_cache *nwrap, char *line)
1850 struct nwrap_pw *nwrap_pw;
1857 nwrap_pw = (struct nwrap_pw *)nwrap->private_data;
1859 list_size = sizeof(*nwrap_pw->list) * (nwrap_pw->num+1);
1860 pw = (struct passwd *)realloc(nwrap_pw->list, list_size);
1862 NWRAP_LOG(NWRAP_LOG_ERROR,
1863 "realloc(%u) failed",
1864 (unsigned)list_size);
1867 nwrap_pw->list = pw;
1869 pw = &nwrap_pw->list[nwrap_pw->num];
1876 NWRAP_LOG(NWRAP_LOG_ERROR,
1877 "Invalid line[%s]: '%s'",
1887 NWRAP_LOG(NWRAP_LOG_TRACE, "name[%s]\n", pw->pw_name);
1892 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
1900 NWRAP_LOG(NWRAP_LOG_TRACE, "password[%s]\n", pw->pw_passwd);
1905 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
1911 pw->pw_uid = (uid_t)strtoul(c, &e, 10);
1913 NWRAP_LOG(NWRAP_LOG_ERROR,
1914 "Invalid line[%s]: '%s' - %s",
1915 line, c, strerror(errno));
1919 NWRAP_LOG(NWRAP_LOG_ERROR,
1920 "Invalid line[%s]: '%s' - %s",
1921 line, c, strerror(errno));
1925 NWRAP_LOG(NWRAP_LOG_ERROR,
1926 "Invalid line[%s]: '%s' - %s",
1927 line, c, strerror(errno));
1932 NWRAP_LOG(NWRAP_LOG_TRACE, "uid[%u]", pw->pw_uid);
1937 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
1943 pw->pw_gid = (gid_t)strtoul(c, &e, 10);
1945 NWRAP_LOG(NWRAP_LOG_ERROR,
1946 "Invalid line[%s]: '%s' - %s",
1947 line, c, strerror(errno));
1951 NWRAP_LOG(NWRAP_LOG_ERROR,
1952 "Invalid line[%s]: '%s' - %s",
1953 line, c, strerror(errno));
1957 NWRAP_LOG(NWRAP_LOG_ERROR,
1958 "Invalid line[%s]: '%s' - %s",
1959 line, c, strerror(errno));
1964 NWRAP_LOG(NWRAP_LOG_TRACE, "gid[%u]\n", pw->pw_gid);
1969 NWRAP_LOG(NWRAP_LOG_ERROR, "invalid line[%s]: '%s'", line, c);
1977 NWRAP_LOG(NWRAP_LOG_TRACE, "gecos[%s]", pw->pw_gecos);
1982 NWRAP_LOG(NWRAP_LOG_ERROR, "'%s'", c);
1990 NWRAP_LOG(NWRAP_LOG_TRACE, "dir[%s]", pw->pw_dir);
1994 NWRAP_LOG(NWRAP_LOG_TRACE, "shell[%s]", pw->pw_shell);
1996 NWRAP_LOG(NWRAP_LOG_DEBUG,
1997 "Added user[%s:%s:%u:%u:%s:%s:%s]",
1998 pw->pw_name, pw->pw_passwd,
1999 pw->pw_uid, pw->pw_gid,
2000 pw->pw_gecos, pw->pw_dir, pw->pw_shell);
2006 static void nwrap_pw_unload(struct nwrap_cache *nwrap)
2008 struct nwrap_pw *nwrap_pw;
2009 nwrap_pw = (struct nwrap_pw *)nwrap->private_data;
2011 SAFE_FREE(nwrap_pw->list);
2016 static int nwrap_pw_copy_r(const struct passwd *src, struct passwd *dst,
2017 char *buf, size_t buflen, struct passwd **dstp)
2023 first = src->pw_name;
2025 last = src->pw_shell;
2026 while (*last) last++;
2028 ofs = PTR_DIFF(last + 1, first);
2030 if (ofs > (off_t) buflen) {
2034 memcpy(buf, first, ofs);
2036 ofs = PTR_DIFF(src->pw_name, first);
2037 dst->pw_name = buf + ofs;
2038 ofs = PTR_DIFF(src->pw_passwd, first);
2039 dst->pw_passwd = buf + ofs;
2040 dst->pw_uid = src->pw_uid;
2041 dst->pw_gid = src->pw_gid;
2042 ofs = PTR_DIFF(src->pw_gecos, first);
2043 dst->pw_gecos = buf + ofs;
2044 ofs = PTR_DIFF(src->pw_dir, first);
2045 dst->pw_dir = buf + ofs;
2046 ofs = PTR_DIFF(src->pw_shell, first);
2047 dst->pw_shell = buf + ofs;
2056 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
2057 static bool nwrap_sp_parse_line(struct nwrap_cache *nwrap, char *line)
2059 struct nwrap_sp *nwrap_sp;
2066 nwrap_sp = (struct nwrap_sp *)nwrap->private_data;
2068 list_size = sizeof(*nwrap_sp->list) * (nwrap_sp->num+1);
2069 sp = (struct spwd *)realloc(nwrap_sp->list, list_size);
2071 NWRAP_LOG(NWRAP_LOG_ERROR,
2072 "realloc(%u) failed",
2073 (unsigned)list_size);
2076 nwrap_sp->list = sp;
2078 sp = &nwrap_sp->list[nwrap_sp->num];
2085 NWRAP_LOG(NWRAP_LOG_ERROR,
2086 "name -- Invalid line[%s]: '%s'",
2096 NWRAP_LOG(NWRAP_LOG_TRACE, "name[%s]\n", sp->sp_namp);
2101 NWRAP_LOG(NWRAP_LOG_ERROR,
2102 "pwd -- Invalid line[%s]: '%s'",
2119 NWRAP_LOG(NWRAP_LOG_ERROR,
2120 "lstchg -- Invalid line[%s]: '%s'",
2127 sp->sp_lstchg = strtol(c, &e, 10);
2129 NWRAP_LOG(NWRAP_LOG_ERROR,
2130 "lstchg -- Invalid line[%s]: '%s' - %s",
2131 line, c, strerror(errno));
2135 NWRAP_LOG(NWRAP_LOG_ERROR,
2136 "lstchg -- Invalid line[%s]: '%s' - %s",
2137 line, c, strerror(errno));
2141 NWRAP_LOG(NWRAP_LOG_ERROR,
2142 "lstchg -- Invalid line[%s]: '%s' - %s",
2143 line, c, strerror(errno));
2156 NWRAP_LOG(NWRAP_LOG_ERROR,
2157 "min -- Invalid line[%s]: '%s'",
2164 sp->sp_min = strtol(c, &e, 10);
2166 NWRAP_LOG(NWRAP_LOG_ERROR,
2167 "min -- Invalid line[%s]: '%s' - %s",
2168 line, c, strerror(errno));
2172 NWRAP_LOG(NWRAP_LOG_ERROR,
2173 "min -- Invalid line[%s]: '%s' - %s",
2174 line, c, strerror(errno));
2178 NWRAP_LOG(NWRAP_LOG_ERROR,
2179 "min -- Invalid line[%s]: '%s' - %s",
2180 line, c, strerror(errno));
2193 NWRAP_LOG(NWRAP_LOG_ERROR,
2194 "max -- Invalid line[%s]: '%s'",
2201 sp->sp_max = strtol(c, &e, 10);
2203 NWRAP_LOG(NWRAP_LOG_ERROR,
2204 "max -- Invalid line[%s]: '%s' - %s",
2205 line, c, strerror(errno));
2209 NWRAP_LOG(NWRAP_LOG_ERROR,
2210 "max -- Invalid line[%s]: '%s' - %s",
2211 line, c, strerror(errno));
2215 NWRAP_LOG(NWRAP_LOG_ERROR,
2216 "max -- Invalid line[%s]: '%s' - %s",
2217 line, c, strerror(errno));
2230 NWRAP_LOG(NWRAP_LOG_ERROR,
2231 "warn -- Invalid line[%s]: '%s'",
2238 sp->sp_warn = strtol(c, &e, 10);
2240 NWRAP_LOG(NWRAP_LOG_ERROR,
2241 "warn -- Invalid line[%s]: '%s' - %s",
2242 line, c, strerror(errno));
2246 NWRAP_LOG(NWRAP_LOG_ERROR,
2247 "warn -- Invalid line[%s]: '%s' - %s",
2248 line, c, strerror(errno));
2252 NWRAP_LOG(NWRAP_LOG_ERROR,
2253 "warn -- Invalid line[%s]: '%s' - %s",
2254 line, c, strerror(errno));
2267 NWRAP_LOG(NWRAP_LOG_ERROR,
2268 "inact -- Invalid line[%s]: '%s'",
2275 sp->sp_inact = strtol(c, &e, 10);
2277 NWRAP_LOG(NWRAP_LOG_ERROR,
2278 "inact -- Invalid line[%s]: '%s' - %s",
2279 line, c, strerror(errno));
2283 NWRAP_LOG(NWRAP_LOG_ERROR,
2284 "inact -- Invalid line[%s]: '%s' - %s",
2285 line, c, strerror(errno));
2289 NWRAP_LOG(NWRAP_LOG_ERROR,
2290 "inact -- Invalid line[%s]: '%s' - %s",
2291 line, c, strerror(errno));
2304 NWRAP_LOG(NWRAP_LOG_ERROR,
2305 "expire -- Invalid line[%s]: '%s'",
2312 sp->sp_expire = strtol(c, &e, 10);
2314 NWRAP_LOG(NWRAP_LOG_ERROR,
2315 "expire -- Invalid line[%s]: '%s' - %s",
2316 line, c, strerror(errno));
2320 NWRAP_LOG(NWRAP_LOG_ERROR,
2321 "expire -- Invalid line[%s]: '%s' - %s",
2322 line, c, strerror(errno));
2326 NWRAP_LOG(NWRAP_LOG_ERROR,
2327 "expire -- Invalid line[%s]: '%s' - %s",
2328 line, c, strerror(errno));
2338 static void nwrap_sp_unload(struct nwrap_cache *nwrap)
2340 struct nwrap_sp *nwrap_sp;
2341 nwrap_sp = (struct nwrap_sp *)nwrap->private_data;
2343 SAFE_FREE(nwrap_sp->list);
2347 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
2350 * the caller has to call nwrap_unload() on failure
2352 static bool nwrap_gr_parse_line(struct nwrap_cache *nwrap, char *line)
2354 struct nwrap_gr *nwrap_gr;
2362 nwrap_gr = (struct nwrap_gr *)nwrap->private_data;
2364 list_size = sizeof(*nwrap_gr->list) * (nwrap_gr->num+1);
2365 gr = (struct group *)realloc(nwrap_gr->list, list_size);
2367 NWRAP_LOG(NWRAP_LOG_ERROR, "realloc failed");
2370 nwrap_gr->list = gr;
2372 gr = &nwrap_gr->list[nwrap_gr->num];
2379 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
2387 NWRAP_LOG(NWRAP_LOG_TRACE, "name[%s]", gr->gr_name);
2392 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
2400 NWRAP_LOG(NWRAP_LOG_TRACE, "password[%s]", gr->gr_passwd);
2405 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
2411 gr->gr_gid = (gid_t)strtoul(c, &e, 10);
2413 NWRAP_LOG(NWRAP_LOG_ERROR,
2414 "Invalid line[%s]: '%s' - %s",
2415 line, c, strerror(errno));
2419 NWRAP_LOG(NWRAP_LOG_ERROR,
2420 "Invalid line[%s]: '%s' - %s",
2421 line, c, strerror(errno));
2425 NWRAP_LOG(NWRAP_LOG_ERROR,
2426 "Invalid line[%s]: '%s' - %s",
2427 line, c, strerror(errno));
2432 NWRAP_LOG(NWRAP_LOG_TRACE, "gid[%u]", gr->gr_gid);
2435 gr->gr_mem = (char **)malloc(sizeof(char *));
2437 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
2440 gr->gr_mem[0] = NULL;
2442 for(nummem=0; p; nummem++) {
2452 if (strlen(c) == 0) {
2456 m_size = sizeof(char *) * (nummem+2);
2457 m = (char **)realloc(gr->gr_mem, m_size);
2459 NWRAP_LOG(NWRAP_LOG_ERROR,
2460 "realloc(%zd) failed",
2465 gr->gr_mem[nummem] = c;
2466 gr->gr_mem[nummem+1] = NULL;
2468 NWRAP_LOG(NWRAP_LOG_TRACE,
2470 nummem, gr->gr_mem[nummem]);
2473 NWRAP_LOG(NWRAP_LOG_DEBUG,
2474 "Added group[%s:%s:%u:] with %u members",
2475 gr->gr_name, gr->gr_passwd, gr->gr_gid, nummem);
2481 static void nwrap_gr_unload(struct nwrap_cache *nwrap)
2484 struct nwrap_gr *nwrap_gr;
2485 nwrap_gr = (struct nwrap_gr *)nwrap->private_data;
2487 if (nwrap_gr->list) {
2488 for (i=0; i < nwrap_gr->num; i++) {
2489 SAFE_FREE(nwrap_gr->list[i].gr_mem);
2491 SAFE_FREE(nwrap_gr->list);
2498 static int nwrap_gr_copy_r(const struct group *src, struct group *dst,
2499 char *buf, size_t buflen, struct group **dstp)
2509 first = src->gr_name;
2511 lastm = src->gr_mem;
2518 last = src->gr_passwd;
2520 while (*last) last++;
2522 ofsb = PTR_DIFF(last + 1, first);
2523 ofsm = PTR_DIFF(lastm + 1, src->gr_mem);
2525 if ((ofsb + ofsm) > (off_t) buflen) {
2529 memcpy(buf, first, ofsb);
2530 memcpy(buf + ofsb, src->gr_mem, ofsm);
2532 ofs = PTR_DIFF(src->gr_name, first);
2533 dst->gr_name = buf + ofs;
2534 ofs = PTR_DIFF(src->gr_passwd, first);
2535 dst->gr_passwd = buf + ofs;
2536 dst->gr_gid = src->gr_gid;
2538 dst->gr_mem = (char **)(buf + ofsb);
2539 for (i=0; src->gr_mem[i]; i++) {
2540 ofs = PTR_DIFF(src->gr_mem[i], first);
2541 dst->gr_mem[i] = buf + ofs;
2551 static struct nwrap_entlist *nwrap_entlist_init(struct nwrap_entdata *ed)
2553 struct nwrap_entlist *el;
2556 NWRAP_LOG(NWRAP_LOG_ERROR,
2557 "entry is NULL, can't create list item");
2561 el = (struct nwrap_entlist *)malloc(sizeof(struct nwrap_entlist));
2563 NWRAP_LOG(NWRAP_LOG_ERROR, "malloc failed");
2573 static bool nwrap_ed_inventarize_add_new(char *const h_name,
2574 struct nwrap_entdata *const ed)
2578 struct nwrap_entlist *el;
2580 if (h_name == NULL) {
2581 NWRAP_LOG(NWRAP_LOG_ERROR, "h_name NULL - can't add");
2585 el = nwrap_entlist_init(ed);
2591 e.data = (void *)el;
2593 p = hsearch(e, ENTER);
2595 NWRAP_LOG(NWRAP_LOG_ERROR, "Hash table is full!");
2602 static bool nwrap_ed_inventarize_add_to_existing(struct nwrap_entdata *const ed,
2603 struct nwrap_entlist *const el)
2605 struct nwrap_entlist *cursor;
2606 struct nwrap_entlist *el_new;
2609 NWRAP_LOG(NWRAP_LOG_ERROR, "list is NULL, can not add");
2614 for (cursor = el; cursor->next != NULL; cursor = cursor->next)
2616 if (cursor->ed == ed) {
2621 if (cursor->ed == ed) {
2625 el_new = nwrap_entlist_init(ed);
2626 if (el_new == NULL) {
2630 cursor->next = el_new;
2634 static bool nwrap_ed_inventarize(char *const name,
2635 struct nwrap_entdata *const ed)
2644 NWRAP_LOG(NWRAP_LOG_DEBUG, "Searching name: %s", e.key);
2646 p = hsearch(e, FIND);
2648 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s not found. Adding...", name);
2649 ok = nwrap_ed_inventarize_add_new(name, ed);
2651 struct nwrap_entlist *el = (struct nwrap_entlist *)p->data;
2653 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s found. Add record to list.", name);
2654 ok = nwrap_ed_inventarize_add_to_existing(ed, el);
2660 static bool nwrap_add_hname(struct nwrap_entdata *const ed)
2662 char *const h_name = (char *const)(ed->ht.h_name);
2666 ok = nwrap_ed_inventarize(h_name, ed);
2671 if (ed->ht.h_aliases == NULL) {
2675 /* Itemize aliases */
2676 for (i = 0; ed->ht.h_aliases[i] != NULL; ++i) {
2679 h_name_alias = ed->ht.h_aliases[i];
2681 NWRAP_LOG(NWRAP_LOG_DEBUG, "Add alias: %s", h_name_alias);
2683 if (!nwrap_ed_inventarize(h_name_alias, ed)) {
2684 NWRAP_LOG(NWRAP_LOG_ERROR,
2685 "Unable to add alias: %s", h_name_alias);
2693 static bool nwrap_he_parse_line(struct nwrap_cache *nwrap, char *line)
2695 struct nwrap_he *nwrap_he = (struct nwrap_he *)nwrap->private_data;
2696 bool do_aliases = true;
2697 ssize_t aliases_count = 0;
2705 struct nwrap_entdata *ed = (struct nwrap_entdata *)
2706 malloc(sizeof(struct nwrap_entdata));
2708 NWRAP_LOG(NWRAP_LOG_ERROR,
2709 "Unable to allocate memory for nwrap_entdata");
2720 /* Walk to first char */
2721 for (p = i; *p != '.' && *p != ':' && !isxdigit((int) *p); p++) {
2723 NWRAP_LOG(NWRAP_LOG_ERROR,
2724 "Invalid line[%s]: '%s'",
2731 for (i = p; !isspace((int)*p); p++) {
2733 NWRAP_LOG(NWRAP_LOG_ERROR,
2734 "Invalid line[%s]: '%s'",
2743 if (inet_pton(AF_INET, i, ed->addr.host_addr)) {
2744 ed->ht.h_addrtype = AF_INET;
2745 ed->ht.h_length = 4;
2747 } else if (inet_pton(AF_INET6, i, ed->addr.host_addr)) {
2748 ed->ht.h_addrtype = AF_INET6;
2749 ed->ht.h_length = 16;
2752 NWRAP_LOG(NWRAP_LOG_ERROR,
2753 "Invalid line[%s]: '%s'",
2761 nwrap_vector_add_item(&(ed->nwrap_addrdata),
2762 (void *const)ed->addr.host_addr);
2763 ed->ht.h_addr_list = nwrap_vector_head(&ed->nwrap_addrdata);
2771 /* Walk to first char */
2772 for (n = p; *p != '_' && !isalnum((int) *p); p++) {
2774 NWRAP_LOG(NWRAP_LOG_ERROR,
2775 "Invalid line[%s]: '%s'",
2783 for (n = p; !isspace((int)*p); p++) {
2792 /* Convert to lowercase. This operate on same memory region */
2796 /* glib's getent always dereferences he->h_aliases */
2797 ed->ht.h_aliases = malloc(sizeof(char *));
2798 if (ed->ht.h_aliases == NULL) {
2802 ed->ht.h_aliases[0] = NULL;
2807 while (do_aliases) {
2813 /* Walk to first char */
2814 for (a = p; *p != '_' && !isalnum((int) *p); p++) {
2820 /* Only trailing spaces are left */
2825 for (a = p; !isspace((int)*p); p++) {
2834 aliases = realloc(ed->ht.h_aliases, sizeof(char *) * (aliases_count + 2));
2835 if (aliases == NULL) {
2839 ed->ht.h_aliases = aliases;
2842 aliases[aliases_count] = a;
2843 aliases[aliases_count + 1] = NULL;
2848 nwrap_vector_add_item(&(nwrap_he->entdata), (void *const)ed);
2850 ed->aliases_count = aliases_count;
2851 /* Inventarize item */
2852 ok = nwrap_add_hname(ed);
2857 ok = nwrap_ed_inventarize(ip, ed);
2866 static void nwrap_he_unload(struct nwrap_cache *nwrap)
2868 struct nwrap_he *nwrap_he =
2869 (struct nwrap_he *)nwrap->private_data;
2870 struct nwrap_entdata *ed;
2873 nwrap_vector_foreach (ed, nwrap_he->entdata, i)
2875 SAFE_FREE(ed->nwrap_addrdata.items);
2876 SAFE_FREE(ed->ht.h_aliases);
2879 SAFE_FREE(nwrap_he->entdata.items);
2880 nwrap_he->entdata.count = nwrap_he->entdata.capacity = 0;
2887 /* user functions */
2888 static struct passwd *nwrap_files_getpwnam(struct nwrap_backend *b,
2894 (void) b; /* unused */
2896 NWRAP_LOG(NWRAP_LOG_DEBUG, "Lookup user %s in files", name);
2898 ok = nwrap_files_cache_reload(nwrap_pw_global.cache);
2900 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading passwd file");
2904 for (i=0; i<nwrap_pw_global.num; i++) {
2905 if (strcmp(nwrap_pw_global.list[i].pw_name, name) == 0) {
2906 NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] found", name);
2907 return &nwrap_pw_global.list[i];
2909 NWRAP_LOG(NWRAP_LOG_DEBUG,
2910 "user[%s] does not match [%s]",
2912 nwrap_pw_global.list[i].pw_name);
2915 NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] not found\n", name);
2921 static int nwrap_files_getpwnam_r(struct nwrap_backend *b,
2922 const char *name, struct passwd *pwdst,
2923 char *buf, size_t buflen, struct passwd **pwdstp)
2927 pw = nwrap_files_getpwnam(b, name);
2935 return nwrap_pw_copy_r(pw, pwdst, buf, buflen, pwdstp);
2938 static struct passwd *nwrap_files_getpwuid(struct nwrap_backend *b,
2944 (void) b; /* unused */
2946 ok = nwrap_files_cache_reload(nwrap_pw_global.cache);
2948 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading passwd file");
2952 for (i=0; i<nwrap_pw_global.num; i++) {
2953 if (nwrap_pw_global.list[i].pw_uid == uid) {
2954 NWRAP_LOG(NWRAP_LOG_DEBUG, "uid[%u] found", uid);
2955 return &nwrap_pw_global.list[i];
2957 NWRAP_LOG(NWRAP_LOG_DEBUG,
2958 "uid[%u] does not match [%u]",
2960 nwrap_pw_global.list[i].pw_uid);
2963 NWRAP_LOG(NWRAP_LOG_DEBUG, "uid[%u] not found\n", uid);
2969 static int nwrap_files_getpwuid_r(struct nwrap_backend *b,
2970 uid_t uid, struct passwd *pwdst,
2971 char *buf, size_t buflen, struct passwd **pwdstp)
2975 pw = nwrap_files_getpwuid(b, uid);
2983 return nwrap_pw_copy_r(pw, pwdst, buf, buflen, pwdstp);
2986 /* user enum functions */
2987 static void nwrap_files_setpwent(struct nwrap_backend *b)
2989 (void) b; /* unused */
2991 nwrap_pw_global.idx = 0;
2994 static struct passwd *nwrap_files_getpwent(struct nwrap_backend *b)
2998 (void) b; /* unused */
3000 if (nwrap_pw_global.idx == 0) {
3002 ok = nwrap_files_cache_reload(nwrap_pw_global.cache);
3004 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading passwd file");
3009 if (nwrap_pw_global.idx >= nwrap_pw_global.num) {
3014 pw = &nwrap_pw_global.list[nwrap_pw_global.idx++];
3016 NWRAP_LOG(NWRAP_LOG_DEBUG,
3017 "return user[%s] uid[%u]",
3018 pw->pw_name, pw->pw_uid);
3023 static int nwrap_files_getpwent_r(struct nwrap_backend *b,
3024 struct passwd *pwdst, char *buf,
3025 size_t buflen, struct passwd **pwdstp)
3029 pw = nwrap_files_getpwent(b);
3037 return nwrap_pw_copy_r(pw, pwdst, buf, buflen, pwdstp);
3040 static void nwrap_files_endpwent(struct nwrap_backend *b)
3042 (void) b; /* unused */
3044 nwrap_pw_global.idx = 0;
3049 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
3051 #ifdef HAVE_SETSPENT
3052 static void nwrap_files_setspent(void)
3054 nwrap_sp_global.idx = 0;
3057 static struct spwd *nwrap_files_getspent(void)
3061 if (nwrap_sp_global.idx == 0) {
3064 ok = nwrap_files_cache_reload(nwrap_sp_global.cache);
3066 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading shadow file");
3071 if (nwrap_sp_global.idx >= nwrap_sp_global.num) {
3076 sp = &nwrap_sp_global.list[nwrap_sp_global.idx++];
3078 NWRAP_LOG(NWRAP_LOG_DEBUG,
3085 static void nwrap_files_endspent(void)
3087 nwrap_sp_global.idx = 0;
3089 #endif /* HAVE_SETSPENT */
3091 static struct spwd *nwrap_files_getspnam(const char *name)
3096 NWRAP_LOG(NWRAP_LOG_DEBUG, "Lookup user %s in files", name);
3098 ok = nwrap_files_cache_reload(nwrap_sp_global.cache);
3100 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading shadow file");
3104 for (i=0; i<nwrap_sp_global.num; i++) {
3105 if (strcmp(nwrap_sp_global.list[i].sp_namp, name) == 0) {
3106 NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] found", name);
3107 return &nwrap_sp_global.list[i];
3109 NWRAP_LOG(NWRAP_LOG_DEBUG,
3110 "user[%s] does not match [%s]",
3112 nwrap_sp_global.list[i].sp_namp);
3115 NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] not found\n", name);
3120 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
3122 /* misc functions */
3123 static int nwrap_files_initgroups(struct nwrap_backend *b,
3132 groups = (gid_t *)malloc(size * sizeof(gid_t));
3133 if (groups == NULL) {
3134 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
3140 nwrap_files_setgrent(b);
3141 while ((grp = nwrap_files_getgrent(b)) != NULL) {
3144 NWRAP_LOG(NWRAP_LOG_DEBUG,
3145 "Inspecting %s for group membership",
3148 for (i=0; grp->gr_mem && grp->gr_mem[i] != NULL; i++) {
3149 if (group != grp->gr_gid &&
3150 (strcmp(user, grp->gr_mem[i]) == 0)) {
3151 NWRAP_LOG(NWRAP_LOG_DEBUG,
3152 "%s is member of %s",
3156 groups = (gid_t *)realloc(groups,
3157 (size + 1) * sizeof(gid_t));
3158 if (groups == NULL) {
3159 NWRAP_LOG(NWRAP_LOG_ERROR,
3165 groups[size] = grp->gr_gid;
3171 nwrap_files_endgrent(b);
3173 NWRAP_LOG(NWRAP_LOG_DEBUG,
3174 "%s is member of %d groups",
3177 /* This really only works if uid_wrapper is loaded */
3178 rc = setgroups(size, groups);
3185 /* group functions */
3186 static struct group *nwrap_files_getgrnam(struct nwrap_backend *b,
3192 (void) b; /* unused */
3194 ok = nwrap_files_cache_reload(nwrap_gr_global.cache);
3196 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading group file");
3200 for (i=0; i<nwrap_gr_global.num; i++) {
3201 if (strcmp(nwrap_gr_global.list[i].gr_name, name) == 0) {
3202 NWRAP_LOG(NWRAP_LOG_DEBUG, "group[%s] found", name);
3203 return &nwrap_gr_global.list[i];
3205 NWRAP_LOG(NWRAP_LOG_DEBUG,
3206 "group[%s] does not match [%s]",
3208 nwrap_gr_global.list[i].gr_name);
3211 NWRAP_LOG(NWRAP_LOG_DEBUG, "group[%s] not found", name);
3217 static int nwrap_files_getgrnam_r(struct nwrap_backend *b,
3218 const char *name, struct group *grdst,
3219 char *buf, size_t buflen, struct group **grdstp)
3223 gr = nwrap_files_getgrnam(b, name);
3231 return nwrap_gr_copy_r(gr, grdst, buf, buflen, grdstp);
3234 static struct group *nwrap_files_getgrgid(struct nwrap_backend *b,
3240 (void) b; /* unused */
3242 ok = nwrap_files_cache_reload(nwrap_gr_global.cache);
3244 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading group file");
3248 for (i=0; i<nwrap_gr_global.num; i++) {
3249 if (nwrap_gr_global.list[i].gr_gid == gid) {
3250 NWRAP_LOG(NWRAP_LOG_DEBUG, "gid[%u] found", gid);
3251 return &nwrap_gr_global.list[i];
3253 NWRAP_LOG(NWRAP_LOG_DEBUG,
3254 "gid[%u] does not match [%u]",
3256 nwrap_gr_global.list[i].gr_gid);
3259 NWRAP_LOG(NWRAP_LOG_DEBUG, "gid[%u] not found", gid);
3265 static int nwrap_files_getgrgid_r(struct nwrap_backend *b,
3266 gid_t gid, struct group *grdst,
3267 char *buf, size_t buflen, struct group **grdstp)
3271 gr = nwrap_files_getgrgid(b, gid);
3279 return nwrap_gr_copy_r(gr, grdst, buf, buflen, grdstp);
3282 /* group enum functions */
3283 static void nwrap_files_setgrent(struct nwrap_backend *b)
3285 (void) b; /* unused */
3287 nwrap_gr_global.idx = 0;
3290 static struct group *nwrap_files_getgrent(struct nwrap_backend *b)
3294 (void) b; /* unused */
3296 if (nwrap_gr_global.idx == 0) {
3299 ok = nwrap_files_cache_reload(nwrap_gr_global.cache);
3301 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading group file");
3306 if (nwrap_gr_global.idx >= nwrap_gr_global.num) {
3311 gr = &nwrap_gr_global.list[nwrap_gr_global.idx++];
3313 NWRAP_LOG(NWRAP_LOG_DEBUG,
3314 "return group[%s] gid[%u]",
3315 gr->gr_name, gr->gr_gid);
3320 static int nwrap_files_getgrent_r(struct nwrap_backend *b,
3321 struct group *grdst, char *buf,
3322 size_t buflen, struct group **grdstp)
3326 gr = nwrap_files_getgrent(b);
3334 return nwrap_gr_copy_r(gr, grdst, buf, buflen, grdstp);
3337 static void nwrap_files_endgrent(struct nwrap_backend *b)
3339 (void) b; /* unused */
3341 nwrap_gr_global.idx = 0;
3344 /* hosts functions */
3345 static int nwrap_files_gethostbyname(const char *name, int af,
3346 struct hostent *result,
3347 struct nwrap_vector *addr_list)
3349 struct nwrap_entlist *el;
3354 char canon_name[DNS_NAME_MAX] = { 0 };
3356 bool he_found = false;
3359 ok = nwrap_files_cache_reload(nwrap_he_global.cache);
3361 NWRAP_LOG(NWRAP_LOG_ERROR, "error loading hosts file");
3365 name_len = strlen(name);
3366 if (name_len < sizeof(canon_name) && name[name_len - 1] == '.') {
3367 strncpy(canon_name, name, name_len - 1);
3371 if (!str_tolower_copy(&h_name_lower, name)) {
3372 NWRAP_LOG(NWRAP_LOG_DEBUG,
3373 "Out of memory while converting to lower case");
3377 /* Look at hash table for element */
3378 NWRAP_LOG(NWRAP_LOG_DEBUG, "Searching for name: %s", h_name_lower);
3379 e.key = h_name_lower;
3381 e_p = hsearch(e, FIND);
3383 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s not found.", h_name_lower);
3384 SAFE_FREE(h_name_lower);
3387 SAFE_FREE(h_name_lower);
3389 /* Always cleanup vector and results */
3390 if (!nwrap_vector_is_initialized(addr_list)) {
3391 if (!nwrap_vector_init(addr_list)) {
3392 NWRAP_LOG(NWRAP_LOG_DEBUG,
3393 "Unable to initialize memory for addr_list vector");
3397 /* When vector is initialized data are valid no more.
3398 * Quick way how to free vector is: */
3399 addr_list->count = 0;
3402 /* Iterate through results */
3403 for (el = (struct nwrap_entlist *)e_p->data; el != NULL; el = el->next)
3407 /* Filter by address familiy if provided */
3408 if (af != AF_UNSPEC && he->h_addrtype != af) {
3414 * glibc doesn't return ipv6 addresses when AF_UNSPEC is used
3416 if (af == AF_UNSPEC && he->h_addrtype != AF_INET) {
3421 memcpy(result, he, sizeof(struct hostent));
3422 NWRAP_LOG(NWRAP_LOG_DEBUG,
3423 "Name found. Returning record for %s",
3427 nwrap_vector_merge(addr_list, &el->ed->nwrap_addrdata);
3428 result->h_addr_list = nwrap_vector_head(addr_list);
3434 NWRAP_LOG(NWRAP_LOG_DEBUG,
3435 "Name found in database. No records matches type.");
3442 #ifdef HAVE_GETHOSTBYNAME_R
3443 static int nwrap_gethostbyname_r(const char *name,
3444 struct hostent *ret,
3445 char *buf, size_t buflen,
3446 struct hostent **result, int *h_errnop)
3448 struct nwrap_vector *addr_list = malloc(sizeof(struct nwrap_vector));
3451 if (addr_list == NULL) {
3452 NWRAP_LOG(NWRAP_LOG_ERROR,
3453 "Unable to allocate memory for address list");
3458 ZERO_STRUCTP(addr_list);
3460 rc = nwrap_files_gethostbyname(name, AF_UNSPEC, ret, addr_list);
3462 *h_errnop = h_errno;
3463 if (addr_list->items != NULL) {
3464 free(addr_list->items);
3466 SAFE_FREE(addr_list);
3471 if (buflen < (addr_list->count * sizeof(void *))) {
3472 SAFE_FREE(addr_list->items);
3473 SAFE_FREE(addr_list);
3477 /* Copy all to user provided buffer and change
3478 * pointers in returned structure.
3479 * +1 is for ending NULL pointer. */
3480 memcpy(buf, addr_list->items, (addr_list->count + 1) * sizeof(void *));
3482 free(addr_list->items);
3485 ret->h_addr_list = (char **)buf;
3490 int gethostbyname_r(const char *name,
3491 struct hostent *ret,
3492 char *buf, size_t buflen,
3493 struct hostent **result, int *h_errnop)
3495 if (!nss_wrapper_hosts_enabled()) {
3496 return libc_gethostbyname_r(name,
3504 return nwrap_gethostbyname_r(name, ret, buf, buflen, result, h_errnop);
3508 static int nwrap_files_getaddrinfo(const char *name,
3509 unsigned short port,
3510 const struct addrinfo *hints,
3511 struct addrinfo **ai)
3513 struct nwrap_entlist *el;
3515 struct addrinfo *ai_head = NULL;
3516 struct addrinfo *ai_cur = NULL;
3519 char canon_name[DNS_NAME_MAX] = { 0 };
3520 bool skip_canonname = false;
3528 ok = nwrap_files_cache_reload(nwrap_he_global.cache);
3530 NWRAP_LOG(NWRAP_LOG_ERROR, "error loading hosts file");
3534 name_len = strlen(name);
3535 if (name_len < DNS_NAME_MAX && name[name_len - 1] == '.') {
3536 strncpy(canon_name, name, name_len - 1);
3540 if (!str_tolower_copy(&h_name_lower, name)) {
3541 NWRAP_LOG(NWRAP_LOG_DEBUG,
3542 "Out of memory while converting to lower case");
3546 NWRAP_LOG(NWRAP_LOG_DEBUG, "Searching for name: %s", h_name_lower);
3547 e.key = h_name_lower;
3549 e_p = hsearch(e, FIND);
3551 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s not found.", h_name_lower);
3552 SAFE_FREE(h_name_lower);
3556 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name: %s found.", h_name_lower);
3557 SAFE_FREE(h_name_lower);
3560 for (el = (struct nwrap_entlist *)e_p->data; el != NULL; el = el->next)
3563 struct addrinfo *ai_new = NULL;
3567 if (hints->ai_family != AF_UNSPEC &&
3568 he->h_addrtype != hints->ai_family)
3570 NWRAP_LOG(NWRAP_LOG_DEBUG,
3571 "Entry found but with wrong AF - "
3572 "remembering EAI_ADDRINFO.");
3573 rc = EAI_ADDRFAMILY;
3577 /* Function allocates memory and returns it in ai. */
3578 rc2 = nwrap_convert_he_ai(he,
3584 NWRAP_LOG(NWRAP_LOG_ERROR, "Error converting he to ai");
3585 if (ai_head != NULL) {
3586 freeaddrinfo(ai_head);
3590 skip_canonname = true;
3592 if (ai_head == NULL) {
3595 if (ai_cur != NULL) {
3596 ai_cur->ai_next = ai_new;
3601 if (ai_head != NULL) {
3610 static struct hostent *nwrap_files_gethostbyaddr(const void *addr,
3611 socklen_t len, int type)
3614 char ip[NWRAP_INET_ADDRSTRLEN] = {0};
3615 struct nwrap_entdata *ed;
3620 (void) len; /* unused */
3622 ok = nwrap_files_cache_reload(nwrap_he_global.cache);
3624 NWRAP_LOG(NWRAP_LOG_ERROR, "error loading hosts file");
3628 a = inet_ntop(type, addr, ip, sizeof(ip));
3634 nwrap_vector_foreach(ed, nwrap_he_global.entdata, i)
3637 if (he->h_addrtype != type) {
3641 if (memcmp(addr, he->h_addr_list[0], he->h_length) == 0) {
3650 #ifdef HAVE_GETHOSTBYADDR_R
3651 static int nwrap_gethostbyaddr_r(const void *addr, socklen_t len, int type,
3652 struct hostent *ret,
3653 char *buf, size_t buflen,
3654 struct hostent **result, int *h_errnop)
3656 *result = nwrap_files_gethostbyaddr(addr, len, type);
3657 if (*result != NULL) {
3658 memset(buf, '\0', buflen);
3662 *h_errnop = h_errno;
3667 int gethostbyaddr_r(const void *addr, socklen_t len, int type,
3668 struct hostent *ret,
3669 char *buf, size_t buflen,
3670 struct hostent **result, int *h_errnop)
3672 if (!nss_wrapper_hosts_enabled()) {
3673 return libc_gethostbyaddr_r(addr,
3683 return nwrap_gethostbyaddr_r(addr, len, type, ret, buf, buflen, result, h_errnop);
3687 /* hosts enum functions */
3688 static void nwrap_files_sethostent(void)
3690 nwrap_he_global.idx = 0;
3693 static struct hostent *nwrap_files_gethostent(void)
3697 if (nwrap_he_global.idx == 0) {
3700 ok = nwrap_files_cache_reload(nwrap_he_global.cache);
3702 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading hosts file");
3707 if (nwrap_he_global.idx >= nwrap_he_global.num) {
3712 he = &((struct nwrap_entdata *)nwrap_he_global.entdata.items[nwrap_he_global.idx++])->ht;
3714 NWRAP_LOG(NWRAP_LOG_DEBUG, "return hosts[%s]", he->h_name);
3719 static void nwrap_files_endhostent(void)
3721 nwrap_he_global.idx = 0;
3729 static struct passwd *nwrap_module_getpwnam(struct nwrap_backend *b,
3732 static struct passwd pwd;
3733 static char buf[1000];
3736 if (!b->fns->_nss_getpwnam_r) {
3740 status = b->fns->_nss_getpwnam_r(name, &pwd, buf, sizeof(buf), &errno);
3741 if (status == NSS_STATUS_NOTFOUND) {
3744 if (status != NSS_STATUS_SUCCESS) {
3751 static int nwrap_module_getpwnam_r(struct nwrap_backend *b,
3752 const char *name, struct passwd *pwdst,
3753 char *buf, size_t buflen, struct passwd **pwdstp)
3757 (void) b; /* unused */
3758 (void) pwdst; /* unused */
3759 (void) pwdstp; /* unused */
3761 if (!b->fns->_nss_getpwnam_r) {
3762 return NSS_STATUS_NOTFOUND;
3765 ret = b->fns->_nss_getpwnam_r(name, pwdst, buf, buflen, &errno);
3767 case NSS_STATUS_SUCCESS:
3769 case NSS_STATUS_NOTFOUND:
3774 case NSS_STATUS_TRYAGAIN:
3787 static struct passwd *nwrap_module_getpwuid(struct nwrap_backend *b,
3790 static struct passwd pwd;
3791 static char buf[1000];
3794 if (!b->fns->_nss_getpwuid_r) {
3798 status = b->fns->_nss_getpwuid_r(uid, &pwd, buf, sizeof(buf), &errno);
3799 if (status == NSS_STATUS_NOTFOUND) {
3802 if (status != NSS_STATUS_SUCCESS) {
3808 static int nwrap_module_getpwuid_r(struct nwrap_backend *b,
3809 uid_t uid, struct passwd *pwdst,
3810 char *buf, size_t buflen, struct passwd **pwdstp)
3814 (void) pwdstp; /* unused */
3816 if (!b->fns->_nss_getpwuid_r) {
3820 ret = b->fns->_nss_getpwuid_r(uid, pwdst, buf, buflen, &errno);
3822 case NSS_STATUS_SUCCESS:
3824 case NSS_STATUS_NOTFOUND:
3829 case NSS_STATUS_TRYAGAIN:
3842 static void nwrap_module_setpwent(struct nwrap_backend *b)
3844 if (!b->fns->_nss_setpwent) {
3848 b->fns->_nss_setpwent();
3851 static struct passwd *nwrap_module_getpwent(struct nwrap_backend *b)
3853 static struct passwd pwd;
3854 static char buf[1000];
3857 if (!b->fns->_nss_getpwent_r) {
3861 status = b->fns->_nss_getpwent_r(&pwd, buf, sizeof(buf), &errno);
3862 if (status == NSS_STATUS_NOTFOUND) {
3865 if (status != NSS_STATUS_SUCCESS) {
3871 static int nwrap_module_getpwent_r(struct nwrap_backend *b,
3872 struct passwd *pwdst, char *buf,
3873 size_t buflen, struct passwd **pwdstp)
3877 (void) pwdstp; /* unused */
3879 if (!b->fns->_nss_getpwent_r) {
3883 ret = b->fns->_nss_getpwent_r(pwdst, buf, buflen, &errno);
3885 case NSS_STATUS_SUCCESS:
3887 case NSS_STATUS_NOTFOUND:
3892 case NSS_STATUS_TRYAGAIN:
3905 static void nwrap_module_endpwent(struct nwrap_backend *b)
3907 if (!b->fns->_nss_endpwent) {
3911 b->fns->_nss_endpwent();
3914 static int nwrap_module_initgroups(struct nwrap_backend *b,
3915 const char *user, gid_t group)
3921 if (!b->fns->_nss_initgroups) {
3922 return NSS_STATUS_UNAVAIL;
3925 return b->fns->_nss_initgroups(user, group, &start, &size, &groups, 0, &errno);
3928 static struct group *nwrap_module_getgrnam(struct nwrap_backend *b,
3931 static struct group grp;
3933 static int buflen = 1000;
3936 if (!b->fns->_nss_getgrnam_r) {
3941 buf = (char *)malloc(buflen);
3944 status = b->fns->_nss_getgrnam_r(name, &grp, buf, buflen, &errno);
3945 if (status == NSS_STATUS_TRYAGAIN) {
3947 buf = (char *)realloc(buf, buflen);
3953 if (status == NSS_STATUS_NOTFOUND) {
3957 if (status != NSS_STATUS_SUCCESS) {
3964 static int nwrap_module_getgrnam_r(struct nwrap_backend *b,
3965 const char *name, struct group *grdst,
3966 char *buf, size_t buflen, struct group **grdstp)
3970 (void) grdstp; /* unused */
3972 if (!b->fns->_nss_getgrnam_r) {
3976 ret = b->fns->_nss_getgrnam_r(name, grdst, buf, buflen, &errno);
3978 case NSS_STATUS_SUCCESS:
3980 case NSS_STATUS_NOTFOUND:
3985 case NSS_STATUS_TRYAGAIN:
3998 static struct group *nwrap_module_getgrgid(struct nwrap_backend *b,
4001 static struct group grp;
4003 static int buflen = 1000;
4006 if (!b->fns->_nss_getgrgid_r) {
4011 buf = (char *)malloc(buflen);
4015 status = b->fns->_nss_getgrgid_r(gid, &grp, buf, buflen, &errno);
4016 if (status == NSS_STATUS_TRYAGAIN) {
4018 buf = (char *)realloc(buf, buflen);
4024 if (status == NSS_STATUS_NOTFOUND) {
4028 if (status != NSS_STATUS_SUCCESS) {
4035 static int nwrap_module_getgrgid_r(struct nwrap_backend *b,
4036 gid_t gid, struct group *grdst,
4037 char *buf, size_t buflen, struct group **grdstp)
4041 (void) grdstp; /* unused */
4043 if (!b->fns->_nss_getgrgid_r) {
4047 ret = b->fns->_nss_getgrgid_r(gid, grdst, buf, buflen, &errno);
4049 case NSS_STATUS_SUCCESS:
4051 case NSS_STATUS_NOTFOUND:
4056 case NSS_STATUS_TRYAGAIN:
4069 static void nwrap_module_setgrent(struct nwrap_backend *b)
4071 if (!b->fns->_nss_setgrent) {
4075 b->fns->_nss_setgrent();
4078 static struct group *nwrap_module_getgrent(struct nwrap_backend *b)
4080 static struct group grp;
4082 static int buflen = 1024;
4085 if (!b->fns->_nss_getgrent_r) {
4090 buf = (char *)malloc(buflen);
4094 status = b->fns->_nss_getgrent_r(&grp, buf, buflen, &errno);
4095 if (status == NSS_STATUS_TRYAGAIN) {
4097 buf = (char *)realloc(buf, buflen);
4103 if (status == NSS_STATUS_NOTFOUND) {
4107 if (status != NSS_STATUS_SUCCESS) {
4114 static int nwrap_module_getgrent_r(struct nwrap_backend *b,
4115 struct group *grdst, char *buf,
4116 size_t buflen, struct group **grdstp)
4120 (void) grdstp; /* unused */
4122 if (!b->fns->_nss_getgrent_r) {
4126 ret = b->fns->_nss_getgrent_r(grdst, buf, buflen, &errno);
4128 case NSS_STATUS_SUCCESS:
4130 case NSS_STATUS_NOTFOUND:
4135 case NSS_STATUS_TRYAGAIN:
4148 static void nwrap_module_endgrent(struct nwrap_backend *b)
4150 if (!b->fns->_nss_endgrent) {
4154 b->fns->_nss_endgrent();
4157 /****************************************************************************
4159 ***************************************************************************/
4161 static struct passwd *nwrap_getpwnam(const char *name)
4166 for (i=0; i < nwrap_main_global->num_backends; i++) {
4167 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4168 pwd = b->ops->nw_getpwnam(b, name);
4177 struct passwd *getpwnam(const char *name)
4179 if (!nss_wrapper_enabled()) {
4180 return libc_getpwnam(name);
4183 return nwrap_getpwnam(name);
4186 /****************************************************************************
4188 ***************************************************************************/
4190 static int nwrap_getpwnam_r(const char *name, struct passwd *pwdst,
4191 char *buf, size_t buflen, struct passwd **pwdstp)
4195 for (i=0; i < nwrap_main_global->num_backends; i++) {
4196 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4197 ret = b->ops->nw_getpwnam_r(b, name, pwdst, buf, buflen, pwdstp);
4198 if (ret == ENOENT) {
4207 #ifdef HAVE_GETPWNAM_R
4208 # ifdef HAVE_SOLARIS_GETPWNAM_R
4209 int getpwnam_r(const char *name, struct passwd *pwdst,
4210 char *buf, int buflen, struct passwd **pwdstp)
4211 # else /* HAVE_SOLARIS_GETPWNAM_R */
4212 int getpwnam_r(const char *name, struct passwd *pwdst,
4213 char *buf, size_t buflen, struct passwd **pwdstp)
4214 # endif /* HAVE_SOLARIS_GETPWNAM_R */
4216 if (!nss_wrapper_enabled()) {
4217 return libc_getpwnam_r(name, pwdst, buf, buflen, pwdstp);
4220 return nwrap_getpwnam_r(name, pwdst, buf, buflen, pwdstp);
4224 /****************************************************************************
4226 ***************************************************************************/
4228 static struct passwd *nwrap_getpwuid(uid_t uid)
4233 for (i=0; i < nwrap_main_global->num_backends; i++) {
4234 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4235 pwd = b->ops->nw_getpwuid(b, uid);
4244 struct passwd *getpwuid(uid_t uid)
4246 if (!nss_wrapper_enabled()) {
4247 return libc_getpwuid(uid);
4250 return nwrap_getpwuid(uid);
4253 /****************************************************************************
4255 ***************************************************************************/
4257 static int nwrap_getpwuid_r(uid_t uid, struct passwd *pwdst,
4258 char *buf, size_t buflen, struct passwd **pwdstp)
4262 for (i=0; i < nwrap_main_global->num_backends; i++) {
4263 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4264 ret = b->ops->nw_getpwuid_r(b, uid, pwdst, buf, buflen, pwdstp);
4265 if (ret == ENOENT) {
4274 #ifdef HAVE_SOLARIS_GETPWUID_R
4275 int getpwuid_r(uid_t uid, struct passwd *pwdst,
4276 char *buf, int buflen, struct passwd **pwdstp)
4278 int getpwuid_r(uid_t uid, struct passwd *pwdst,
4279 char *buf, size_t buflen, struct passwd **pwdstp)
4282 if (!nss_wrapper_enabled()) {
4283 return libc_getpwuid_r(uid, pwdst, buf, buflen, pwdstp);
4286 return nwrap_getpwuid_r(uid, pwdst, buf, buflen, pwdstp);
4289 /****************************************************************************
4291 ***************************************************************************/
4293 static void nwrap_setpwent(void)
4297 for (i=0; i < nwrap_main_global->num_backends; i++) {
4298 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4299 b->ops->nw_setpwent(b);
4305 if (!nss_wrapper_enabled()) {
4313 /****************************************************************************
4315 ***************************************************************************/
4317 static struct passwd *nwrap_getpwent(void)
4322 for (i=0; i < nwrap_main_global->num_backends; i++) {
4323 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4324 pwd = b->ops->nw_getpwent(b);
4333 struct passwd *getpwent(void)
4335 if (!nss_wrapper_enabled()) {
4336 return libc_getpwent();
4339 return nwrap_getpwent();
4342 /****************************************************************************
4344 ***************************************************************************/
4346 static int nwrap_getpwent_r(struct passwd *pwdst, char *buf,
4347 size_t buflen, struct passwd **pwdstp)
4351 for (i=0; i < nwrap_main_global->num_backends; i++) {
4352 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4353 ret = b->ops->nw_getpwent_r(b, pwdst, buf, buflen, pwdstp);
4354 if (ret == ENOENT) {
4363 #ifdef HAVE_SOLARIS_GETPWENT_R
4364 struct passwd *getpwent_r(struct passwd *pwdst, char *buf, int buflen)
4366 struct passwd *pwdstp = NULL;
4369 if (!nss_wrapper_enabled()) {
4370 return libc_getpwent_r(pwdst, buf, buflen);
4372 rc = nwrap_getpwent_r(pwdst, buf, buflen, &pwdstp);
4379 #else /* HAVE_SOLARIS_GETPWENT_R */
4380 int getpwent_r(struct passwd *pwdst, char *buf,
4381 size_t buflen, struct passwd **pwdstp)
4383 if (!nss_wrapper_enabled()) {
4384 return libc_getpwent_r(pwdst, buf, buflen, pwdstp);
4387 return nwrap_getpwent_r(pwdst, buf, buflen, pwdstp);
4389 #endif /* HAVE_SOLARIS_GETPWENT_R */
4391 /****************************************************************************
4393 ***************************************************************************/
4395 static void nwrap_endpwent(void)
4399 for (i=0; i < nwrap_main_global->num_backends; i++) {
4400 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4401 b->ops->nw_endpwent(b);
4407 if (!nss_wrapper_enabled()) {
4415 /****************************************************************************
4417 ***************************************************************************/
4419 static int nwrap_initgroups(const char *user, gid_t group)
4423 for (i=0; i < nwrap_main_global->num_backends; i++) {
4424 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4427 rc = b->ops->nw_initgroups(b, user, group);
4437 int initgroups(const char *user, gid_t group)
4439 if (!nss_wrapper_enabled()) {
4440 return libc_initgroups(user, group);
4443 return nwrap_initgroups(user, group);
4446 /****************************************************************************
4448 ***************************************************************************/
4450 static struct group *nwrap_getgrnam(const char *name)
4455 for (i=0; i < nwrap_main_global->num_backends; i++) {
4456 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4457 grp = b->ops->nw_getgrnam(b, name);
4466 struct group *getgrnam(const char *name)
4468 if (!nss_wrapper_enabled()) {
4469 return libc_getgrnam(name);
4472 return nwrap_getgrnam(name);
4475 /****************************************************************************
4477 ***************************************************************************/
4479 static int nwrap_getgrnam_r(const char *name, struct group *grdst,
4480 char *buf, size_t buflen, struct group **grdstp)
4484 for (i=0; i < nwrap_main_global->num_backends; i++) {
4485 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4486 ret = b->ops->nw_getgrnam_r(b, name, grdst, buf, buflen, grdstp);
4487 if (ret == ENOENT) {
4496 #ifdef HAVE_GETGRNAM_R
4497 # ifdef HAVE_SOLARIS_GETGRNAM_R
4498 int getgrnam_r(const char *name, struct group *grp,
4499 char *buf, int buflen, struct group **pgrp)
4500 # else /* HAVE_SOLARIS_GETGRNAM_R */
4501 int getgrnam_r(const char *name, struct group *grp,
4502 char *buf, size_t buflen, struct group **pgrp)
4503 # endif /* HAVE_SOLARIS_GETGRNAM_R */
4505 if (!nss_wrapper_enabled()) {
4506 return libc_getgrnam_r(name,
4513 return nwrap_getgrnam_r(name, grp, buf, buflen, pgrp);
4515 #endif /* HAVE_GETGRNAM_R */
4517 /****************************************************************************
4519 ***************************************************************************/
4521 static struct group *nwrap_getgrgid(gid_t gid)
4526 for (i=0; i < nwrap_main_global->num_backends; i++) {
4527 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4528 grp = b->ops->nw_getgrgid(b, gid);
4537 struct group *getgrgid(gid_t gid)
4539 if (!nss_wrapper_enabled()) {
4540 return libc_getgrgid(gid);
4543 return nwrap_getgrgid(gid);
4546 /****************************************************************************
4548 ***************************************************************************/
4550 static int nwrap_getgrgid_r(gid_t gid, struct group *grdst,
4551 char *buf, size_t buflen, struct group **grdstp)
4555 for (i=0; i < nwrap_main_global->num_backends; i++) {
4556 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4557 ret = b->ops->nw_getgrgid_r(b, gid, grdst, buf, buflen, grdstp);
4558 if (ret == ENOENT) {
4567 #ifdef HAVE_GETGRGID_R
4568 # ifdef HAVE_SOLARIS_GETGRGID_R
4569 int getgrgid_r(gid_t gid, struct group *grdst,
4570 char *buf, int buflen, struct group **grdstp)
4571 # else /* HAVE_SOLARIS_GETGRGID_R */
4572 int getgrgid_r(gid_t gid, struct group *grdst,
4573 char *buf, size_t buflen, struct group **grdstp)
4574 # endif /* HAVE_SOLARIS_GETGRGID_R */
4576 if (!nss_wrapper_enabled()) {
4577 return libc_getgrgid_r(gid, grdst, buf, buflen, grdstp);
4580 return nwrap_getgrgid_r(gid, grdst, buf, buflen, grdstp);
4584 /****************************************************************************
4586 ***************************************************************************/
4588 static void nwrap_setgrent(void)
4592 for (i=0; i < nwrap_main_global->num_backends; i++) {
4593 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4594 b->ops->nw_setgrent(b);
4598 #ifdef HAVE_BSD_SETGRENT
4604 if (!nss_wrapper_enabled()) {
4612 #ifdef HAVE_BSD_SETGRENT
4619 /****************************************************************************
4621 ***************************************************************************/
4623 static struct group *nwrap_getgrent(void)
4628 for (i=0; i < nwrap_main_global->num_backends; i++) {
4629 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4630 grp = b->ops->nw_getgrent(b);
4639 struct group *getgrent(void)
4641 if (!nss_wrapper_enabled()) {
4642 return libc_getgrent();
4645 return nwrap_getgrent();
4648 /****************************************************************************
4650 ***************************************************************************/
4652 static int nwrap_getgrent_r(struct group *grdst, char *buf,
4653 size_t buflen, struct group **grdstp)
4657 for (i=0; i < nwrap_main_global->num_backends; i++) {
4658 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4659 ret = b->ops->nw_getgrent_r(b, grdst, buf, buflen, grdstp);
4660 if (ret == ENOENT) {
4669 #ifdef HAVE_SOLARIS_GETGRENT_R
4670 struct group *getgrent_r(struct group *src, char *buf, int buflen)
4672 struct group *grdstp = NULL;
4675 if (!nss_wrapper_enabled()) {
4676 return libc_getgrent_r(src, buf, buflen);
4679 rc = nwrap_getgrent_r(src, buf, buflen, &grdstp);
4686 #else /* HAVE_SOLARIS_GETGRENT_R */
4687 int getgrent_r(struct group *src, char *buf,
4688 size_t buflen, struct group **grdstp)
4690 if (!nss_wrapper_enabled()) {
4691 return libc_getgrent_r(src, buf, buflen, grdstp);
4694 return nwrap_getgrent_r(src, buf, buflen, grdstp);
4696 #endif /* HAVE_SOLARIS_GETGRENT_R */
4698 /****************************************************************************
4700 ***************************************************************************/
4702 static void nwrap_endgrent(void)
4706 for (i=0; i < nwrap_main_global->num_backends; i++) {
4707 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4708 b->ops->nw_endgrent(b);
4714 if (!nss_wrapper_enabled()) {
4722 /****************************************************************************
4724 ***************************************************************************/
4726 #ifdef HAVE_GETGROUPLIST
4727 static int nwrap_getgrouplist(const char *user, gid_t group,
4728 gid_t *groups, int *ngroups)
4734 NWRAP_LOG(NWRAP_LOG_DEBUG, "getgrouplist called for %s", user);
4736 groups_tmp = (gid_t *)malloc(count * sizeof(gid_t));
4738 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
4742 groups_tmp[0] = group;
4745 while ((grp = nwrap_getgrent()) != NULL) {
4748 NWRAP_LOG(NWRAP_LOG_DEBUG,
4749 "Inspecting %s for group membership",
4752 for (i=0; grp->gr_mem && grp->gr_mem[i] != NULL; i++) {
4754 if (group != grp->gr_gid &&
4755 (strcmp(user, grp->gr_mem[i]) == 0)) {
4757 NWRAP_LOG(NWRAP_LOG_DEBUG,
4758 "%s is member of %s",
4762 groups_tmp = (gid_t *)realloc(groups_tmp, (count + 1) * sizeof(gid_t));
4764 NWRAP_LOG(NWRAP_LOG_ERROR,
4769 groups_tmp[count] = grp->gr_gid;
4778 NWRAP_LOG(NWRAP_LOG_DEBUG,
4779 "%s is member of %d groups",
4782 if (*ngroups < count) {
4789 memcpy(groups, groups_tmp, count * sizeof(gid_t));
4795 int getgrouplist(const char *user, gid_t group, gid_t *groups, int *ngroups)
4797 if (!nss_wrapper_enabled()) {
4798 return libc_getgrouplist(user, group, groups, ngroups);
4801 return nwrap_getgrouplist(user, group, groups, ngroups);
4805 /**********************************************************
4807 **********************************************************/
4809 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
4811 #ifdef HAVE_SETSPENT
4812 static void nwrap_setspent(void)
4814 nwrap_files_setspent();
4819 if (!nss_wrapper_shadow_enabled()) {
4826 static struct spwd *nwrap_getspent(void)
4828 return nwrap_files_getspent();
4831 struct spwd *getspent(void)
4833 if (!nss_wrapper_shadow_enabled()) {
4837 return nwrap_getspent();
4840 static void nwrap_endspent(void)
4842 nwrap_files_endspent();
4847 if (!nss_wrapper_shadow_enabled()) {
4853 #endif /* HAVE_SETSPENT */
4855 static struct spwd *nwrap_getspnam(const char *name)
4857 return nwrap_files_getspnam(name);
4860 struct spwd *getspnam(const char *name)
4862 if (!nss_wrapper_shadow_enabled()) {
4866 return nwrap_getspnam(name);
4869 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
4871 /**********************************************************
4873 **********************************************************/
4875 static void nwrap_sethostent(int stayopen) {
4876 (void) stayopen; /* ignored */
4878 nwrap_files_sethostent();
4881 #ifdef HAVE_SOLARIS_SETHOSTENT
4882 int sethostent(int stayopen)
4884 if (!nss_wrapper_hosts_enabled()) {
4885 libc_sethostent(stayopen);
4889 nwrap_sethostent(stayopen);
4893 #else /* HAVE_SOLARIS_SETHOSTENT */
4894 void sethostent(int stayopen)
4896 if (!nss_wrapper_hosts_enabled()) {
4897 libc_sethostent(stayopen);
4901 nwrap_sethostent(stayopen);
4903 #endif /* HAVE_SOLARIS_SETHOSTENT */
4905 static struct hostent *nwrap_gethostent(void)
4907 return nwrap_files_gethostent();
4910 struct hostent *gethostent(void) {
4911 if (!nss_wrapper_hosts_enabled()) {
4912 return libc_gethostent();
4915 return nwrap_gethostent();
4918 static void nwrap_endhostent(void) {
4919 nwrap_files_endhostent();
4922 #ifdef HAVE_SOLARIS_ENDHOSTENT
4923 int endhostent(void)
4925 if (!nss_wrapper_hosts_enabled()) {
4934 #else /* HAVE_SOLARIS_ENDHOSTENT */
4935 void endhostent(void)
4937 if (!nss_wrapper_hosts_enabled()) {
4944 #endif /* HAVE_SOLARIS_ENDHOSTENT */
4947 /* BSD implementation stores data in thread local storage but GLIBC does not */
4948 static __thread struct hostent user_he;
4949 static __thread struct nwrap_vector user_addrlist;
4951 static struct hostent user_he;
4952 static struct nwrap_vector user_addrlist;
4954 static struct hostent *nwrap_gethostbyname(const char *name)
4956 if (nwrap_files_gethostbyname(name, AF_UNSPEC, &user_he, &user_addrlist) == -1) {
4962 struct hostent *gethostbyname(const char *name)
4964 if (!nss_wrapper_hosts_enabled()) {
4965 return libc_gethostbyname(name);
4968 return nwrap_gethostbyname(name);
4971 /* This is a GNU extension - Also can be found on BSD systems */
4972 #ifdef HAVE_GETHOSTBYNAME2
4974 /* BSD implementation stores data in thread local storage but GLIBC not */
4975 static __thread struct hostent user_he2;
4976 static __thread struct nwrap_vector user_addrlist2;
4978 static struct hostent user_he2;
4979 static struct nwrap_vector user_addrlist2;
4981 static struct hostent *nwrap_gethostbyname2(const char *name, int af)
4983 if (nwrap_files_gethostbyname(name, af, &user_he2, &user_addrlist2) == -1) {
4989 struct hostent *gethostbyname2(const char *name, int af)
4991 if (!nss_wrapper_hosts_enabled()) {
4992 return libc_gethostbyname2(name, af);
4995 return nwrap_gethostbyname2(name, af);
4999 static struct hostent *nwrap_gethostbyaddr(const void *addr,
5000 socklen_t len, int type)
5002 return nwrap_files_gethostbyaddr(addr, len, type);
5005 struct hostent *gethostbyaddr(const void *addr,
5006 socklen_t len, int type)
5008 if (!nss_wrapper_hosts_enabled()) {
5009 return libc_gethostbyaddr(addr, len, type);
5012 return nwrap_gethostbyaddr(addr, len, type);
5015 static const struct addrinfo default_hints =
5017 .ai_flags = AI_ADDRCONFIG|AI_V4MAPPED,
5018 .ai_family = AF_UNSPEC,
5023 .ai_canonname = NULL,
5027 static int nwrap_convert_he_ai(const struct hostent *he,
5028 unsigned short port,
5029 const struct addrinfo *hints,
5030 struct addrinfo **pai,
5031 bool skip_canonname)
5033 struct addrinfo *ai;
5040 switch (he->h_addrtype) {
5042 socklen = sizeof(struct sockaddr_in);
5046 socklen = sizeof(struct sockaddr_in6);
5053 ai = (struct addrinfo *)malloc(sizeof(struct addrinfo) + socklen);
5058 ai->ai_flags = hints->ai_flags;
5059 ai->ai_family = he->h_addrtype;
5060 ai->ai_socktype = hints->ai_socktype;
5061 ai->ai_protocol = hints->ai_protocol;
5062 ai->ai_canonname = NULL;
5064 if (ai->ai_socktype == 0) {
5065 ai->ai_socktype = SOCK_DGRAM;
5067 if (ai->ai_protocol == 0) {
5068 if (ai->ai_socktype == SOCK_DGRAM) {
5069 ai->ai_protocol = IPPROTO_UDP;
5070 } else if (ai->ai_socktype == SOCK_STREAM) {
5071 ai->ai_protocol = IPPROTO_TCP;
5075 ai->ai_addrlen = socklen;
5076 ai->ai_addr = (void *)(ai + 1);
5078 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
5079 ai->ai_addr->sa_len = socklen;
5081 ai->ai_addr->sa_family = he->h_addrtype;
5083 switch (he->h_addrtype) {
5086 struct sockaddr_in *sinp =
5087 (struct sockaddr_in *) ai->ai_addr;
5089 memset(sinp, 0, sizeof(struct sockaddr_in));
5091 sinp->sin_port = htons(port);
5092 sinp->sin_family = AF_INET;
5094 memset (sinp->sin_zero, '\0', sizeof (sinp->sin_zero));
5095 memcpy(&sinp->sin_addr, he->h_addr_list[0], he->h_length);
5102 struct sockaddr_in6 *sin6p =
5103 (struct sockaddr_in6 *) ai->ai_addr;
5105 memset(sin6p, 0, sizeof(struct sockaddr_in6));
5107 sin6p->sin6_port = htons(port);
5108 sin6p->sin6_family = AF_INET6;
5110 memcpy(&sin6p->sin6_addr,
5120 if (he->h_name && !skip_canonname) {
5121 ai->ai_canonname = strdup(he->h_name);
5122 if (ai->ai_canonname == NULL) {
5132 static int nwrap_getaddrinfo(const char *node,
5133 const char *service,
5134 const struct addrinfo *hints,
5135 struct addrinfo **res)
5137 struct addrinfo *ai = NULL;
5138 unsigned short port = 0;
5148 .family = AF_UNSPEC,
5152 if (node == NULL && service == NULL) {
5156 if (hints == NULL) {
5157 hints = &default_hints;
5161 hints.ai_flags contains invalid flags; or, hints.ai_flags
5162 included AI_CANONNAME and name was NULL.
5164 if ((hints->ai_flags & AI_CANONNAME) && (node == NULL)) {
5165 return EAI_BADFLAGS;
5168 /* If no node has been specified, let glibc deal with it */
5171 struct addrinfo *p = NULL;
5173 ret = libc_getaddrinfo(node, service, hints, &p);
5181 if (service != NULL && service[0] != '\0') {
5182 const char *proto = NULL;
5188 sl = strtol(service, &end_ptr, 10);
5190 if (*end_ptr == '\0') {
5193 } else if (hints->ai_flags & AI_NUMERICSERV) {
5197 if (hints->ai_protocol != 0) {
5198 struct protoent *pent;
5200 pent = getprotobynumber(hints->ai_protocol);
5202 proto = pent->p_name;
5206 s = getservbyname(service, proto);
5210 port = ntohs(s->s_port);
5215 rc = inet_pton(AF_INET, node, &addr.in.v4);
5217 addr.family = AF_INET;
5220 if (addr.family == AF_UNSPEC) {
5221 rc = inet_pton(AF_INET6, node, &addr.in.v6);
5223 addr.family = AF_INET6;
5228 if (addr.family == AF_UNSPEC) {
5229 if (hints->ai_flags & AI_NUMERICHOST) {
5232 } else if ((hints->ai_family != AF_UNSPEC) &&
5233 (hints->ai_family != addr.family))
5235 return EAI_ADDRFAMILY;
5238 rc = nwrap_files_getaddrinfo(node, port, hints, &ai);
5241 struct addrinfo *p = NULL;
5243 ret = libc_getaddrinfo(node, service, hints, &p);
5247 * nwrap_files_getaddrinfo failed, but libc was
5248 * successful -- use the result from libc.
5258 * If the socktype was not specified, duplicate
5259 * each ai returned, so that we have variants for
5262 if (hints->ai_socktype == 0) {
5263 struct addrinfo *ai_cur;
5265 /* freeaddrinfo() frees ai_canonname and ai so allocate them */
5266 for (ai_cur = ai; ai_cur != NULL; ai_cur = ai_cur->ai_next) {
5267 struct addrinfo *ai_new;
5269 /* duplicate the current entry */
5271 ai_new = malloc(sizeof(struct addrinfo));
5272 if (ai_new == NULL) {
5277 memcpy(ai_new, ai_cur, sizeof(struct addrinfo));
5278 ai_new->ai_next = NULL;
5280 /* We need a deep copy or freeaddrinfo() will blow up */
5281 if (ai_cur->ai_canonname != NULL) {
5282 ai_new->ai_canonname =
5283 strdup(ai_cur->ai_canonname);
5286 if (ai_cur->ai_socktype == SOCK_DGRAM) {
5287 ai_new->ai_socktype = SOCK_STREAM;
5288 } else if (ai_cur->ai_socktype == SOCK_STREAM) {
5289 ai_new->ai_socktype = SOCK_DGRAM;
5291 if (ai_cur->ai_protocol == IPPROTO_TCP) {
5292 ai_new->ai_protocol = IPPROTO_UDP;
5293 } else if (ai_cur->ai_protocol == IPPROTO_UDP) {
5294 ai_new->ai_protocol = IPPROTO_TCP;
5297 /* now insert the new entry */
5299 ai_new->ai_next = ai_cur->ai_next;
5300 ai_cur->ai_next = ai_new;
5302 /* and move on (don't duplicate the new entry) */
5313 int getaddrinfo(const char *node, const char *service,
5314 const struct addrinfo *hints,
5315 struct addrinfo **res)
5317 if (!nss_wrapper_hosts_enabled()) {
5318 return libc_getaddrinfo(node, service, hints, res);
5321 return nwrap_getaddrinfo(node, service, hints, res);
5324 static int nwrap_getnameinfo(const struct sockaddr *sa, socklen_t salen,
5325 char *host, size_t hostlen,
5326 char *serv, size_t servlen,
5330 struct servent *service;
5337 if (sa == NULL || salen < sizeof(sa_family_t)) {
5341 if ((flags & NI_NAMEREQD) && host == NULL && serv == NULL) {
5345 type = sa->sa_family;
5348 if (salen < sizeof(struct sockaddr_in))
5350 addr = &((const struct sockaddr_in *)sa)->sin_addr;
5351 addrlen = sizeof(((const struct sockaddr_in *)sa)->sin_addr);
5352 port = ntohs(((const struct sockaddr_in *)sa)->sin_port);
5356 if (salen < sizeof(struct sockaddr_in6))
5358 addr = &((const struct sockaddr_in6 *)sa)->sin6_addr;
5359 addrlen = sizeof(((const struct sockaddr_in6 *)sa)->sin6_addr);
5360 port = ntohs(((const struct sockaddr_in6 *)sa)->sin6_port);
5369 if ((flags & NI_NUMERICHOST) == 0) {
5370 he = nwrap_files_gethostbyaddr(addr, addrlen, type);
5371 if ((flags & NI_NAMEREQD) && (he == NULL || he->h_name == NULL))
5374 if (he != NULL && he->h_name != NULL) {
5375 if (strlen(he->h_name) >= hostlen)
5376 return EAI_OVERFLOW;
5377 strcpy(host, he->h_name);
5378 if (flags & NI_NOFQDN)
5379 host[strcspn(host, ".")] = '\0';
5381 if (inet_ntop(type, addr, host, hostlen) == NULL)
5382 return (errno == ENOSPC) ? EAI_OVERFLOW : EAI_FAIL;
5388 if ((flags & NI_NUMERICSERV) == 0) {
5389 proto = (flags & NI_DGRAM) ? "udp" : "tcp";
5390 service = getservbyport(htons(port), proto);
5392 if (service != NULL) {
5393 if (strlen(service->s_name) >= servlen)
5394 return EAI_OVERFLOW;
5395 strcpy(serv, service->s_name);
5397 if (snprintf(serv, servlen, "%u", port) >= (int) servlen)
5398 return EAI_OVERFLOW;
5405 #ifdef HAVE_LINUX_GETNAMEINFO
5406 int getnameinfo(const struct sockaddr *sa, socklen_t salen,
5407 char *host, socklen_t hostlen,
5408 char *serv, socklen_t servlen,
5410 #elif defined(HAVE_LINUX_GETNAMEINFO_UNSIGNED)
5411 int getnameinfo(const struct sockaddr *sa, socklen_t salen,
5412 char *host, socklen_t hostlen,
5413 char *serv, socklen_t servlen,
5416 int getnameinfo(const struct sockaddr *sa, socklen_t salen,
5417 char *host, size_t hostlen,
5418 char *serv, size_t servlen,
5422 if (!nss_wrapper_hosts_enabled()) {
5423 return libc_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
5426 return nwrap_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
5429 static int nwrap_gethostname(char *name, size_t len)
5431 const char *hostname = getenv("NSS_WRAPPER_HOSTNAME");
5433 if (strlen(hostname) >= len) {
5434 errno = ENAMETOOLONG;
5437 snprintf(name, len, "%s", hostname);
5442 #ifdef HAVE_SOLARIS_GETHOSTNAME
5443 int gethostname(char *name, int len)
5444 #else /* HAVE_SOLARIS_GETHOSTNAME */
5445 int gethostname(char *name, size_t len)
5446 #endif /* HAVE_SOLARIS_GETHOSTNAME */
5448 if (!nwrap_hostname_enabled()) {
5449 return libc_gethostname(name, len);
5452 return nwrap_gethostname(name, len);
5455 /****************************
5457 ***************************/
5460 * This function is called when the library is unloaded and makes sure that
5461 * sockets get closed and the unix file for the socket are unlinked.
5463 void nwrap_destructor(void)
5468 if (nwrap_main_global != NULL) {
5469 struct nwrap_main *m = nwrap_main_global;
5472 SAFE_FREE(m->libc->fns);
5473 if (m->libc->handle != NULL) {
5474 dlclose(m->libc->handle);
5476 if (m->libc->nsl_handle != NULL) {
5477 dlclose(m->libc->nsl_handle);
5479 if (m->libc->sock_handle != NULL) {
5480 dlclose(m->libc->sock_handle);
5485 for (i = 0; i < m->num_backends; i++) {
5486 struct nwrap_backend *b = &(m->backends[i]);
5488 if (b->so_handle != NULL) {
5489 dlclose(b->so_handle);
5493 SAFE_FREE(m->backends);
5496 if (nwrap_pw_global.cache != NULL) {
5497 struct nwrap_cache *c = nwrap_pw_global.cache;
5499 nwrap_files_cache_unload(c);
5505 SAFE_FREE(nwrap_pw_global.list);
5506 nwrap_pw_global.num = 0;
5509 if (nwrap_gr_global.cache != NULL) {
5510 struct nwrap_cache *c = nwrap_gr_global.cache;
5512 nwrap_files_cache_unload(c);
5518 SAFE_FREE(nwrap_gr_global.list);
5519 nwrap_pw_global.num = 0;
5522 if (nwrap_he_global.cache != NULL) {
5523 struct nwrap_cache *c = nwrap_he_global.cache;
5525 nwrap_files_cache_unload(c);
5531 nwrap_he_global.num = 0;