lib/nss_wrapper/nss_wrapper.c

   1 /*
   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>
   5  *
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  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.
  18  *
  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.
  22  *
  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
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "config.h"
  37
  38 #include <pthread.h>
  39
  40 #include <sys/types.h>
  41 #include <sys/stat.h>
  42 #include <sys/socket.h>
  43 #include <errno.h>
  44 #include <fcntl.h>
  45 #include <stdarg.h>
  46 #include <stdbool.h>
  47 #include <stddef.h>
  48 #include <stdio.h>
  49 #include <stdint.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <unistd.h>
  53 #include <ctype.h>
  54
  55 #include <netinet/in.h>
  56
  57 #include <search.h>
  58 #include <assert.h>
  59
  60 /*
  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
  63  * Solaris
  64  */
  65 #ifndef _POSIX_PTHREAD_SEMANTICS
  66 #define _POSIX_PTHREAD_SEMANTICS
  67 #endif
  68
  69 #include <pwd.h>
  70 #include <grp.h>
  71 #ifdef HAVE_SHADOW_H
  72 #include <shadow.h>
  73 #endif /* HAVE_SHADOW_H */
  74
  75 #include <netdb.h>
  76 #include <arpa/inet.h>
  77 #include <netinet/in.h>
  78
  79 #include <dlfcn.h>
  80
  81 #if defined(HAVE_NSS_H)
  82 /* Linux and BSD */
  83 #include <nss.h>
  84
  85 typedef enum nss_status NSS_STATUS;
  86 #elif defined(HAVE_NSS_COMMON_H)
  87 /* Solaris */
  88 #include <nss_common.h>
  89 #include <nss_dbdefs.h>
  90 #include <nsswitch.h>
  91
  92 typedef nss_status_t NSS_STATUS;
  93
  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
  98 #else
  99 # error "No nsswitch support detected"
 100 #endif
 101
 102 #ifndef PTR_DIFF
 103 #define PTR_DIFF(p1, p2) ((ptrdiff_t)(((const char *)(p1)) - (const char *)(p2)))
 104 #endif
 105
 106 #ifndef _PUBLIC_
 107 #define _PUBLIC_
 108 #endif
 109
 110 #ifndef EAI_NODATA
 111 #define EAI_NODATA EAI_NONAME
 112 #endif
 113
 114 #ifndef EAI_ADDRFAMILY
 115 #define EAI_ADDRFAMILY EAI_FAMILY
 116 #endif
 117
 118 #ifndef __STRING
 119 #define __STRING(x)    #x
 120 #endif
 121
 122 #ifndef __STRINGSTRING
 123 #define __STRINGSTRING(x) __STRING(x)
 124 #endif
 125
 126 #ifndef __LINESTR__
 127 #define __LINESTR__ __STRINGSTRING(__LINE__)
 128 #endif
 129
 130 #ifndef __location__
 131 #define __location__ __FILE__ ":" __LINESTR__
 132 #endif
 133
 134 #ifndef DNS_NAME_MAX
 135 #define DNS_NAME_MAX 255
 136 #endif
 137
 138 /* GCC have printf type attribute check. */
 139 #ifdef HAVE_ATTRIBUTE_PRINTF_FORMAT
 140 #define PRINTF_ATTRIBUTE(a,b) __attribute__ ((__format__ (__printf__, a, b)))
 141 #else
 142 #define PRINTF_ATTRIBUTE(a,b)
 143 #endif /* HAVE_ATTRIBUTE_PRINTF_FORMAT */
 144
 145 #ifdef HAVE_DESTRUCTOR_ATTRIBUTE
 146 #define DESTRUCTOR_ATTRIBUTE __attribute__ ((destructor))
 147 #else
 148 #define DESTRUCTOR_ATTRIBUTE
 149 #endif /* HAVE_DESTRUCTOR_ATTRIBUTE */
 150
 151 #define ZERO_STRUCTP(x) do { if ((x) != NULL) memset((char *)(x), 0, sizeof(*(x))); } while(0)
 152
 153 #ifndef SAFE_FREE
 154 #define SAFE_FREE(x) do { if ((x) != NULL) {free(x); (x)=NULL;} } while(0)
 155 #endif
 156
 157 #ifdef HAVE_IPV6
 158 #define NWRAP_INET_ADDRSTRLEN INET6_ADDRSTRLEN
 159 #else
 160 #define NWRAP_INET_ADDRSTRLEN INET_ADDRSTRLEN
 161 #endif
 162
 163 #define NWRAP_LOCK(m) do { \
 164         pthread_mutex_lock(&( m ## _mutex)); \
 165 } while(0)
 166
 167 #define NWRAP_UNLOCK(m) do { \
 168         pthread_mutex_unlock(&( m ## _mutex)); \
 169 } while(0)
 170
 171
 172 static bool nwrap_initialized = false;
 173 static pthread_mutex_t nwrap_initialized_mutex = PTHREAD_MUTEX_INITIALIZER;
 174
 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;
 181
 182 /* Add new global locks here please */
 183 /* Also don't forget to add locks to
 184  * nwrap_init() function.
 185  */
 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); \
 193 } while (0);
 194
 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); \
 202 } while (0);
 203
 204 static void nwrap_thread_prepare(void)
 205 {
 206         NWRAP_LOCK_ALL;
 207 }
 208
 209 static void nwrap_thread_parent(void)
 210 {
 211         NWRAP_UNLOCK_ALL;
 212 }
 213
 214 static void nwrap_thread_child(void)
 215 {
 216         NWRAP_UNLOCK_ALL;
 217 }
 218
 219 enum nwrap_dbglvl_e {
 220         NWRAP_LOG_ERROR = 0,
 221         NWRAP_LOG_WARN,
 222         NWRAP_LOG_DEBUG,
 223         NWRAP_LOG_TRACE
 224 };
 225
 226 #ifdef NDEBUG
 227 # define NWRAP_LOG(...)
 228 #else
 229
 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__)
 232
 233 static void nwrap_log(enum nwrap_dbglvl_e dbglvl,
 234                       const char *func,
 235                       const char *format, ...)
 236 {
 237         char buffer[1024];
 238         va_list va;
 239         const char *d;
 240         unsigned int lvl = 0;
 241         int pid = getpid();
 242
 243         d = getenv("NSS_WRAPPER_DEBUGLEVEL");
 244         if (d != NULL) {
 245                 lvl = atoi(d);
 246         }
 247
 248         va_start(va, format);
 249         vsnprintf(buffer, sizeof(buffer), format, va);
 250         va_end(va);
 251
 252         if (lvl >= dbglvl) {
 253                 switch (dbglvl) {
 254                         case NWRAP_LOG_ERROR:
 255                                 fprintf(stderr,
 256                                         "NWRAP_ERROR(%d) - %s: %s\n",
 257                                         pid, func, buffer);
 258                                 break;
 259                         case NWRAP_LOG_WARN:
 260                                 fprintf(stderr,
 261                                         "NWRAP_WARN(%d) - %s: %s\n",
 262                                         pid, func, buffer);
 263                                 break;
 264                         case NWRAP_LOG_DEBUG:
 265                                 fprintf(stderr,
 266                                         "NWRAP_DEBUG(%d) - %s: %s\n",
 267                                         pid, func, buffer);
 268                                 break;
 269                         case NWRAP_LOG_TRACE:
 270                                 fprintf(stderr,
 271                                         "NWRAP_TRACE(%d) - %s: %s\n",
 272                                         pid, func, buffer);
 273                                 break;
 274                 }
 275         }
 276 }
 277 #endif /* NDEBUG NWRAP_LOG */
 278
 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);
 289 #else
 290         int (*_libc_getpwent_r)(struct passwd *pwbuf, char *buf, size_t buflen, struct passwd **pwbufp);
 291 #endif
 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);
 302 #else
 303         int (*_libc_getgrent_r)(struct group *group, char *buf, size_t buflen, struct group **result);
 304 #endif
 305         void (*_libc_endgrent)(void);
 306         int (*_libc_getgrouplist)(const char *user, gid_t group, gid_t *groups, int *ngroups);
 307
 308         void (*_libc_sethostent)(int stayopen);
 309         struct hostent *(*_libc_gethostent)(void);
 310         void (*_libc_endhostent)(void);
 311
 312         struct hostent *(*_libc_gethostbyname)(const char *name);
 313 #ifdef HAVE_GETHOSTBYNAME2 /* GNU extension */
 314         struct hostent *(*_libc_gethostbyname2)(const char *name, int af);
 315 #endif
 316         struct hostent *(*_libc_gethostbyaddr)(const void *addr, socklen_t len, int type);
 317
 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,
 324                                  int flags);
 325         int (*_libc_gethostname)(char *name, size_t len);
 326 #ifdef HAVE_GETHOSTBYNAME_R
 327         int (*_libc_gethostbyname_r)(const char *name,
 328                                      struct hostent *ret,
 329                                      char *buf, size_t buflen,
 330                                      struct hostent **result, int *h_errnop);
 331 #endif
 332 #ifdef HAVE_GETHOSTBYADDR_R
 333         int (*_libc_gethostbyaddr_r)(const void *addr, socklen_t len, int type,
 334                                      struct hostent *ret,
 335                                      char *buf, size_t buflen,
 336                                      struct hostent **result, int *h_errnop);
 337 #endif
 338 };
 339
 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);
 359 };
 360
 361 struct nwrap_backend {
 362         const char *name;
 363         const char *so_path;
 364         void *so_handle;
 365         struct nwrap_ops *ops;
 366         struct nwrap_module_nss_fns *fns;
 367 };
 368
 369 struct nwrap_ops {
 370         struct passwd * (*nw_getpwnam)(struct nwrap_backend *b,
 371                                        const char *name);
 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,
 376                                        uid_t uid);
 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,
 389                                        const char *name);
 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,
 394                                        gid_t gid);
 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);
 404 };
 405
 406 /* Public prototypes */
 407
 408 bool nss_wrapper_enabled(void);
 409 bool nss_wrapper_shadow_enabled(void);
 410 bool nss_wrapper_hosts_enabled(void);
 411
 412 /* prototypes for files backend */
 413
 414
 415 static struct passwd *nwrap_files_getpwnam(struct nwrap_backend *b,
 416                                            const char *name);
 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,
 421                                            uid_t uid);
 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,
 434                                           const char *name);
 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,
 439                                           gid_t gid);
 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);
 449
 450 /* prototypes for module backend */
 451
 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,
 457                                             const char *name);
 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,
 462                                             uid_t uid);
 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,
 473                                            const char *name);
 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,
 478                                            gid_t gid);
 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);
 486
 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,
 505 };
 506
 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,
 525 };
 526
 527 struct nwrap_libc {
 528         void *handle;
 529         void *nsl_handle;
 530         void *sock_handle;
 531         struct nwrap_libc_fns *fns;
 532 };
 533
 534 struct nwrap_main {
 535         int num_backends;
 536         struct nwrap_backend *backends;
 537         struct nwrap_libc *libc;
 538 };
 539
 540 static struct nwrap_main *nwrap_main_global;
 541 static struct nwrap_main __nwrap_main_global;
 542
 543 /*
 544  * PROTOTYPES
 545  */
 546 static int nwrap_convert_he_ai(const struct hostent *he,
 547                                unsigned short port,
 548                                const struct addrinfo *hints,
 549                                struct addrinfo **pai,
 550                                bool skip_canonname);
 551
 552 /*
 553  * VECTORS
 554  */
 555
 556 #define DEFAULT_VECTOR_CAPACITY 16
 557
 558 struct nwrap_vector {
 559         void **items;
 560         size_t count;
 561         size_t capacity;
 562 };
 563
 564 /* Macro returns pointer to first element of vector->items array.
 565  *
 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
 570  * calls.
 571  *
 572  * nwrap_vector->items is array inside nwrap_vector which can be
 573  * directly pointed by libc structure assembled by cwrap itself.
 574  *
 575  * EXAMPLE:
 576  *
 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
 580  *    file parsing etc.
 581  *
 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
 585  * implementation.
 586  * (Yes, not fully - array terminated by NULL is needed because
 587  * it's result expected by libc function caller.)
 588  *
 589  *
 590  * CODE EXAMPLE:
 591  *
 592  * struct hostent he;
 593  * struct nwrap_vector *vector = malloc(sizeof(struct nwrap_vector));
 594  * ... don't care about failed allocation now ...
 595  *
 596  * ... fill nwrap vector ...
 597  *
 598  * struct hostent he;
 599  * he.h_addr_list = nwrap_vector_head(vector);
 600  *
 601  */
 602 #define nwrap_vector_head(vect) ((void *)((vect)->items))
 603
 604 #define nwrap_vector_foreach(item, vect, iter) \
 605         for (iter = 0, (item) = (vect).items == NULL ? NULL : (vect).items[0]; \
 606              item != NULL; \
 607              (item) = (vect).items[++iter])
 608
 609 #define nwrap_vector_is_initialized(vector) ((vector)->items != NULL)
 610
 611 static inline bool nwrap_vector_init(struct nwrap_vector *const vector)
 612 {
 613         if (vector == NULL) {
 614                 return false;
 615         }
 616
 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) {
 621                 return false;
 622         }
 623         vector->capacity = DEFAULT_VECTOR_CAPACITY;
 624         memset(vector->items, '\0', sizeof(void *) * (DEFAULT_VECTOR_CAPACITY + 1));
 625
 626         return true;
 627 }
 628
 629 static bool nwrap_vector_add_item(struct nwrap_vector *vector, void *const item)
 630 {
 631         assert (vector != NULL);
 632
 633         if (vector->items == NULL) {
 634                 nwrap_vector_init(vector);
 635         }
 636
 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.
 640                  */
 641                 void **items = realloc(vector->items, sizeof(void *) * ((vector->capacity * 2) + 1));
 642                 if (items == NULL) {
 643                         return false;
 644                 }
 645                 vector->items = items;
 646
 647                 /* Don't count ending NULL to capacity */
 648                 vector->capacity *= 2;
 649         }
 650
 651         vector->items[vector->count] = item;
 652
 653         vector->count += 1;
 654         vector->items[vector->count] = NULL;
 655
 656         return true;
 657 }
 658
 659 static bool nwrap_vector_merge(struct nwrap_vector *dst,
 660                                struct nwrap_vector *src)
 661 {
 662         void **dst_items = NULL;
 663         size_t count;
 664
 665         if (src->count == 0) {
 666                 return true;
 667         }
 668
 669         count = dst->count + src->count;
 670
 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) {
 675                         return false;
 676                 }
 677                 dst->items = dst_items;
 678                 dst->capacity = count;
 679         }
 680
 681         memcpy((void *)(((long *)dst->items) + dst->count),
 682                src->items,
 683                src->count * sizeof(void *));
 684         dst->count = count;
 685
 686         return true;
 687 }
 688
 689 struct nwrap_cache {
 690         const char *path;
 691         int fd;
 692         FILE *fp;
 693         struct stat st;
 694         void *private_data;
 695
 696         struct nwrap_vector lines;
 697
 698         bool (*parse_line)(struct nwrap_cache *, char *line);
 699         void (*unload)(struct nwrap_cache *);
 700 };
 701
 702 /* passwd */
 703 struct nwrap_pw {
 704         struct nwrap_cache *cache;
 705
 706         struct passwd *list;
 707         int num;
 708         int idx;
 709 };
 710
 711 struct nwrap_cache __nwrap_cache_pw;
 712 struct nwrap_pw nwrap_pw_global;
 713
 714 static bool nwrap_pw_parse_line(struct nwrap_cache *nwrap, char *line);
 715 static void nwrap_pw_unload(struct nwrap_cache *nwrap);
 716
 717 /* shadow */
 718 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
 719 struct nwrap_sp {
 720         struct nwrap_cache *cache;
 721
 722         struct spwd *list;
 723         int num;
 724         int idx;
 725 };
 726
 727 struct nwrap_cache __nwrap_cache_sp;
 728 struct nwrap_sp nwrap_sp_global;
 729
 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) */
 733
 734 /* group */
 735 struct nwrap_gr {
 736         struct nwrap_cache *cache;
 737
 738         struct group *list;
 739         int num;
 740         int idx;
 741 };
 742
 743 struct nwrap_cache __nwrap_cache_gr;
 744 struct nwrap_gr nwrap_gr_global;
 745
 746 /* hosts */
 747 static bool nwrap_he_parse_line(struct nwrap_cache *nwrap, char *line);
 748 static void nwrap_he_unload(struct nwrap_cache *nwrap);
 749
 750 struct nwrap_addrdata {
 751         unsigned char host_addr[16]; /* IPv4 or IPv6 address */
 752 };
 753
 754 static size_t max_hostents = 100;
 755
 756 struct nwrap_entdata {
 757         struct nwrap_addrdata addr;
 758         struct hostent ht;
 759
 760         struct nwrap_vector nwrap_addrdata;
 761
 762         ssize_t aliases_count;
 763 };
 764
 765 struct nwrap_entlist {
 766         struct nwrap_entlist *next;
 767         struct nwrap_entdata *ed;
 768 };
 769
 770 struct nwrap_he {
 771         struct nwrap_cache *cache;
 772
 773         struct nwrap_vector entries;
 774         struct nwrap_vector lists;
 775
 776         int num;
 777         int idx;
 778 };
 779
 780 static struct nwrap_cache __nwrap_cache_he;
 781 static struct nwrap_he nwrap_he_global;
 782
 783
 784 /*********************************************************
 785  * NWRAP PROTOTYPES
 786  *********************************************************/
 787
 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;
 792
 793 /*********************************************************
 794  * NWRAP LIBC LOADER FUNCTIONS
 795  *********************************************************/
 796
 797 enum nwrap_lib {
 798     NWRAP_LIBC,
 799     NWRAP_LIBNSL,
 800     NWRAP_LIBSOCKET,
 801 };
 802
 803 #ifndef NDEBUG
 804 static const char *nwrap_str_lib(enum nwrap_lib lib)
 805 {
 806         switch (lib) {
 807         case NWRAP_LIBC:
 808                 return "libc";
 809         case NWRAP_LIBNSL:
 810                 return "libnsl";
 811         case NWRAP_LIBSOCKET:
 812                 return "libsocket";
 813         }
 814
 815         /* Compiler would warn us about unhandled enum value if we get here */
 816         return "unknown";
 817 }
 818 #endif
 819
 820 static void *nwrap_load_lib_handle(enum nwrap_lib lib)
 821 {
 822         int flags = RTLD_LAZY;
 823         void *handle = NULL;
 824         int i;
 825
 826 #ifdef RTLD_DEEPBIND
 827         flags |= RTLD_DEEPBIND;
 828 #endif
 829
 830         switch (lib) {
 831         case NWRAP_LIBNSL:
 832 #ifdef HAVE_LIBNSL
 833                 handle = nwrap_main_global->libc->nsl_handle;
 834                 if (handle == NULL) {
 835                         for (i = 10; i >= 0; i--) {
 836                                 char soname[256] = {0};
 837
 838                                 snprintf(soname, sizeof(soname), "libnsl.so.%d", i);
 839                                 handle = dlopen(soname, flags);
 840                                 if (handle != NULL) {
 841                                         break;
 842                                 }
 843                         }
 844
 845                         nwrap_main_global->libc->nsl_handle = handle;
 846                 }
 847                 break;
 848 #endif
 849                 /* FALL TROUGH */
 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};
 856
 857                                 snprintf(soname, sizeof(soname), "libsocket.so.%d", i);
 858                                 handle = dlopen(soname, flags);
 859                                 if (handle != NULL) {
 860                                         break;
 861                                 }
 862                         }
 863
 864                         nwrap_main_global->libc->sock_handle = handle;
 865                 }
 866                 break;
 867 #endif
 868                 /* FALL TROUGH */
 869         case NWRAP_LIBC:
 870                 handle = nwrap_main_global->libc->handle;
 871                 if (handle == NULL) {
 872                         for (i = 10; i >= 0; i--) {
 873                                 char soname[256] = {0};
 874
 875                                 snprintf(soname, sizeof(soname), "libc.so.%d", i);
 876                                 handle = dlopen(soname, flags);
 877                                 if (handle != NULL) {
 878                                         break;
 879                                 }
 880                         }
 881
 882                         nwrap_main_global->libc->handle = handle;
 883                 }
 884                 break;
 885         }
 886
 887         if (handle == NULL) {
 888 #ifdef RTLD_NEXT
 889                 handle = nwrap_main_global->libc->handle
 890                        = nwrap_main_global->libc->sock_handle
 891                        = nwrap_main_global->libc->nsl_handle
 892                        = RTLD_NEXT;
 893 #else
 894                 NWRAP_LOG(NWRAP_LOG_ERROR,
 895                           "Failed to dlopen library: %s\n",
 896                           dlerror());
 897                 exit(-1);
 898 #endif
 899         }
 900
 901         return handle;
 902 }
 903
 904 static void *_nwrap_load_lib_function(enum nwrap_lib lib, const char *fn_name)
 905 {
 906         void *handle;
 907         void *func;
 908
 909         nwrap_init();
 910
 911         handle = nwrap_load_lib_handle(lib);
 912
 913         func = dlsym(handle, fn_name);
 914         if (func == NULL) {
 915                 NWRAP_LOG(NWRAP_LOG_ERROR,
 916                                 "Failed to find %s: %s\n",
 917                                 fn_name, dlerror());
 918                 exit(-1);
 919         }
 920
 921         NWRAP_LOG(NWRAP_LOG_TRACE,
 922                         "Loaded %s from %s",
 923                         fn_name, nwrap_str_lib(lib));
 924         return func;
 925 }
 926
 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); \
 931         }
 932
 933 /* INTERNAL HELPER FUNCTIONS */
 934 static void nwrap_lines_unload(struct nwrap_cache *const nwrap)
 935 {
 936         size_t p;
 937         void *item;
 938         nwrap_vector_foreach(item, nwrap->lines, p) {
 939                 /* Maybe some vectors were merged ... */
 940                 SAFE_FREE(item);
 941         }
 942         SAFE_FREE(nwrap->lines.items);
 943         ZERO_STRUCTP(&nwrap->lines);
 944 }
 945
 946 /*
 947  * IMPORTANT
 948  *
 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.
 953  */
 954 static struct passwd *libc_getpwnam(const char *name)
 955 {
 956         nwrap_load_lib_function(NWRAP_LIBC, getpwnam);
 957
 958         return nwrap_main_global->libc->fns->_libc_getpwnam(name);
 959 }
 960
 961 #ifdef HAVE_GETPWNAM_R
 962 static int libc_getpwnam_r(const char *name,
 963                            struct passwd *pwd,
 964                            char *buf,
 965                            size_t buflen,
 966                            struct passwd **result)
 967 {
 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");
 972         }
 973 #else
 974         nwrap_load_lib_function(NWRAP_LIBC, getpwnam_r);
 975 #endif
 976
 977         return nwrap_main_global->libc->fns->_libc_getpwnam_r(name,
 978                                                               pwd,
 979                                                               buf,
 980                                                               buflen,
 981                                                               result);
 982 }
 983 #endif
 984
 985 static struct passwd *libc_getpwuid(uid_t uid)
 986 {
 987         nwrap_load_lib_function(NWRAP_LIBC, getpwuid);
 988
 989         return nwrap_main_global->libc->fns->_libc_getpwuid(uid);
 990 }
 991
 992 #ifdef HAVE_GETPWUID_R
 993 static int libc_getpwuid_r(uid_t uid,
 994                            struct passwd *pwd,
 995                            char *buf,
 996                            size_t buflen,
 997                            struct passwd **result)
 998 {
 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");
1003         }
1004 #else
1005         nwrap_load_lib_function(NWRAP_LIBC, getpwuid_r);
1006 #endif
1007
1008         return nwrap_main_global->libc->fns->_libc_getpwuid_r(uid,
1009                                                               pwd,
1010                                                               buf,
1011                                                               buflen,
1012                                                               result);
1013 }
1014 #endif
1015
1016 static inline void str_tolower(char *dst, char *src)
1017 {
1018         register char *src_tmp = src;
1019         register char *dst_tmp = dst;
1020
1021         while (*src_tmp != '\0') {
1022                 *dst_tmp = tolower(*src_tmp);
1023                 ++src_tmp;
1024                 ++dst_tmp;
1025         }
1026 }
1027
1028 static bool str_tolower_copy(char **dst_name, const char *const src_name)
1029 {
1030         char *h_name_lower;
1031
1032         if ((dst_name == NULL) || (src_name == NULL)) {
1033                 return false;
1034         }
1035
1036         h_name_lower = strdup(src_name);
1037         if (h_name_lower == NULL) {
1038                 NWRAP_LOG(NWRAP_LOG_DEBUG, "Out of memory while strdup");
1039                 return false;
1040         }
1041
1042         str_tolower(h_name_lower, h_name_lower);
1043         *dst_name = h_name_lower;
1044         return true;
1045 }
1046
1047 static void libc_setpwent(void)
1048 {
1049         nwrap_load_lib_function(NWRAP_LIBC, setpwent);
1050
1051         nwrap_main_global->libc->fns->_libc_setpwent();
1052 }
1053
1054 static struct passwd *libc_getpwent(void)
1055 {
1056         nwrap_load_lib_function(NWRAP_LIBC, getpwent);
1057
1058         return nwrap_main_global->libc->fns->_libc_getpwent();
1059 }
1060
1061 #ifdef HAVE_SOLARIS_GETPWENT_R
1062 static struct passwd *libc_getpwent_r(struct passwd *pwdst,
1063                                       char *buf,
1064                                       int buflen)
1065 {
1066         nwrap_load_lib_function(NWRAP_LIBC, getpwent_r);
1067
1068         return nwrap_main_global->libc->fns->_libc_getpwent_r(pwdst,
1069                                                               buf,
1070                                                               buflen);
1071 }
1072 #else /* HAVE_SOLARIS_GETPWENT_R */
1073 static int libc_getpwent_r(struct passwd *pwdst,
1074                            char *buf,
1075                            size_t buflen,
1076                            struct passwd **pwdstp)
1077 {
1078         nwrap_load_lib_function(NWRAP_LIBC, getpwent_r);
1079
1080         return nwrap_main_global->libc->fns->_libc_getpwent_r(pwdst,
1081                                                               buf,
1082                                                               buflen,
1083                                                               pwdstp);
1084 }
1085 #endif /* HAVE_SOLARIS_GETPWENT_R */
1086
1087 static void libc_endpwent(void)
1088 {
1089         nwrap_load_lib_function(NWRAP_LIBC, endpwent);
1090
1091         nwrap_main_global->libc->fns->_libc_endpwent();
1092 }
1093
1094 static int libc_initgroups(const char *user, gid_t gid)
1095 {
1096         nwrap_load_lib_function(NWRAP_LIBC, initgroups);
1097
1098         return nwrap_main_global->libc->fns->_libc_initgroups(user, gid);
1099 }
1100
1101 static struct group *libc_getgrnam(const char *name)
1102 {
1103         nwrap_load_lib_function(NWRAP_LIBC, getgrnam);
1104
1105         return nwrap_main_global->libc->fns->_libc_getgrnam(name);
1106 }
1107
1108 #ifdef HAVE_GETGRNAM_R
1109 static int libc_getgrnam_r(const char *name,
1110                            struct group *grp,
1111                            char *buf,
1112                            size_t buflen,
1113                            struct group **result)
1114 {
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");
1119         }
1120 #else
1121         nwrap_load_lib_function(NWRAP_LIBC, getgrnam_r);
1122 #endif
1123
1124         return nwrap_main_global->libc->fns->_libc_getgrnam_r(name,
1125                                                               grp,
1126                                                               buf,
1127                                                               buflen,
1128                                                               result);
1129 }
1130 #endif
1131
1132 static struct group *libc_getgrgid(gid_t gid)
1133 {
1134         nwrap_load_lib_function(NWRAP_LIBC, getgrgid);
1135
1136         return nwrap_main_global->libc->fns->_libc_getgrgid(gid);
1137 }
1138
1139 #ifdef HAVE_GETGRGID_R
1140 static int libc_getgrgid_r(gid_t gid,
1141                            struct group *grp,
1142                            char *buf,
1143                            size_t buflen,
1144                            struct group **result)
1145 {
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");
1150         }
1151 #else
1152         nwrap_load_lib_function(NWRAP_LIBC, getgrgid_r);
1153 #endif
1154
1155         return nwrap_main_global->libc->fns->_libc_getgrgid_r(gid,
1156                                                               grp,
1157                                                               buf,
1158                                                               buflen,
1159                                                               result);
1160 }
1161 #endif
1162
1163 static void libc_setgrent(void)
1164 {
1165         nwrap_load_lib_function(NWRAP_LIBC, setgrent);
1166
1167         nwrap_main_global->libc->fns->_libc_setgrent();
1168 }
1169
1170 static struct group *libc_getgrent(void)
1171 {
1172         nwrap_load_lib_function(NWRAP_LIBC, getgrent);
1173
1174         return nwrap_main_global->libc->fns->_libc_getgrent();
1175 }
1176
1177 #ifdef HAVE_GETGRENT_R
1178 #ifdef HAVE_SOLARIS_GETGRENT_R
1179 static struct group *libc_getgrent_r(struct group *group,
1180                                      char *buf,
1181                                      size_t buflen)
1182 {
1183         nwrap_load_lib_function(NWRAP_LIBC, getgrent_r);
1184
1185         return nwrap_main_global->libc->fns->_libc_getgrent_r(group,
1186                                                               buf,
1187                                                               buflen);
1188 }
1189 #else /* !HAVE_SOLARIS_GETGRENT_R */
1190 static int libc_getgrent_r(struct group *group,
1191                            char *buf,
1192                            size_t buflen,
1193                            struct group **result)
1194 {
1195         nwrap_load_lib_function(NWRAP_LIBC, getgrent_r);
1196
1197         return nwrap_main_global->libc->fns->_libc_getgrent_r(group,
1198                                                               buf,
1199                                                               buflen,
1200                                                               result);
1201 }
1202 #endif /* HAVE_SOLARIS_GETGRENT_R */
1203 #endif /* HAVE_GETGRENT_R */
1204
1205 static void libc_endgrent(void)
1206 {
1207         nwrap_load_lib_function(NWRAP_LIBC, endgrent);
1208
1209         nwrap_main_global->libc->fns->_libc_endgrent();
1210 }
1211
1212 #ifdef HAVE_GETGROUPLIST
1213 static int libc_getgrouplist(const char *user,
1214                              gid_t group,
1215                              gid_t *groups,
1216                              int *ngroups)
1217 {
1218         nwrap_load_lib_function(NWRAP_LIBC, getgrouplist);
1219
1220         return nwrap_main_global->libc->fns->_libc_getgrouplist(user,
1221                                                                 group,
1222                                                                 groups,
1223                                                                 ngroups);
1224 }
1225 #endif
1226
1227 static void libc_sethostent(int stayopen)
1228 {
1229         nwrap_load_lib_function(NWRAP_LIBNSL, sethostent);
1230
1231         nwrap_main_global->libc->fns->_libc_sethostent(stayopen);
1232 }
1233
1234 static struct hostent *libc_gethostent(void)
1235 {
1236         nwrap_load_lib_function(NWRAP_LIBNSL, gethostent);
1237
1238         return nwrap_main_global->libc->fns->_libc_gethostent();
1239 }
1240
1241 static void libc_endhostent(void)
1242 {
1243         nwrap_load_lib_function(NWRAP_LIBNSL, endhostent);
1244
1245         nwrap_main_global->libc->fns->_libc_endhostent();
1246 }
1247
1248 static struct hostent *libc_gethostbyname(const char *name)
1249 {
1250         nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyname);
1251
1252         return nwrap_main_global->libc->fns->_libc_gethostbyname(name);
1253 }
1254
1255 #ifdef HAVE_GETHOSTBYNAME2 /* GNU extension */
1256 static struct hostent *libc_gethostbyname2(const char *name, int af)
1257 {
1258         nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyname2);
1259
1260         return nwrap_main_global->libc->fns->_libc_gethostbyname2(name, af);
1261 }
1262 #endif
1263
1264 static struct hostent *libc_gethostbyaddr(const void *addr,
1265                                           socklen_t len,
1266                                           int type)
1267 {
1268         nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyaddr);
1269
1270         return nwrap_main_global->libc->fns->_libc_gethostbyaddr(addr,
1271                                                                  len,
1272                                                                  type);
1273 }
1274
1275 static int libc_gethostname(char *name, size_t len)
1276 {
1277         nwrap_load_lib_function(NWRAP_LIBNSL, gethostname);
1278
1279         return nwrap_main_global->libc->fns->_libc_gethostname(name, len);
1280 }
1281
1282 #ifdef HAVE_GETHOSTBYNAME_R
1283 static int libc_gethostbyname_r(const char *name,
1284                                 struct hostent *ret,
1285                                 char *buf,
1286                                 size_t buflen,
1287                                 struct hostent **result,
1288                                 int *h_errnop)
1289 {
1290         nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyname_r);
1291
1292         return nwrap_main_global->libc->fns->_libc_gethostbyname_r(name,
1293                                                                    ret,
1294                                                                    buf,
1295                                                                    buflen,
1296                                                                    result,
1297                                                                    h_errnop);
1298 }
1299 #endif
1300
1301 #ifdef HAVE_GETHOSTBYADDR_R
1302 static int libc_gethostbyaddr_r(const void *addr,
1303                                 socklen_t len,
1304                                 int type,
1305                                 struct hostent *ret,
1306                                 char *buf,
1307                                 size_t buflen,
1308                                 struct hostent **result,
1309                                 int *h_errnop)
1310 {
1311         nwrap_load_lib_function(NWRAP_LIBNSL, gethostbyaddr_r);
1312
1313         return nwrap_main_global->libc->fns->_libc_gethostbyaddr_r(addr,
1314                                                                    len,
1315                                                                    type,
1316                                                                    ret,
1317                                                                    buf,
1318                                                                    buflen,
1319                                                                    result,
1320                                                                    h_errnop);
1321 }
1322 #endif
1323
1324 static int libc_getaddrinfo(const char *node,
1325                             const char *service,
1326                             const struct addrinfo *hints,
1327                             struct addrinfo **res)
1328 {
1329         nwrap_load_lib_function(NWRAP_LIBSOCKET, getaddrinfo);
1330
1331         return nwrap_main_global->libc->fns->_libc_getaddrinfo(node,
1332                                                                service,
1333                                                                hints,
1334                                                                res);
1335 }
1336
1337 static int libc_getnameinfo(const struct sockaddr *sa,
1338                             socklen_t salen,
1339                             char *host,
1340                             size_t hostlen,
1341                             char *serv,
1342                             size_t servlen,
1343                             int flags)
1344 {
1345         nwrap_load_lib_function(NWRAP_LIBSOCKET, getnameinfo);
1346
1347         return nwrap_main_global->libc->fns->_libc_getnameinfo(sa,
1348                                                                salen,
1349                                                                host,
1350                                                                hostlen,
1351                                                                serv,
1352                                                                servlen,
1353                                                                flags);
1354 }
1355
1356 /*********************************************************
1357  * NWRAP NSS MODULE LOADER FUNCTIONS
1358  *********************************************************/
1359
1360 static void *nwrap_load_module_fn(struct nwrap_backend *b,
1361                                   const char *fn_name)
1362 {
1363         void *res;
1364         char *s;
1365
1366         if (!b->so_handle) {
1367                 NWRAP_LOG(NWRAP_LOG_ERROR, "No handle");
1368                 return NULL;
1369         }
1370
1371         if (asprintf(&s, "_nss_%s_%s", b->name, fn_name) == -1) {
1372                 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
1373                 return NULL;
1374         }
1375
1376         res = dlsym(b->so_handle, s);
1377         if (!res) {
1378                 NWRAP_LOG(NWRAP_LOG_ERROR,
1379                           "Cannot find function %s in %s",
1380                           s, b->so_path);
1381         }
1382         SAFE_FREE(s);
1383         return res;
1384 }
1385
1386 static struct nwrap_module_nss_fns *nwrap_load_module_fns(struct nwrap_backend *b)
1387 {
1388         struct nwrap_module_nss_fns *fns;
1389
1390         if (!b->so_handle) {
1391                 return NULL;
1392         }
1393
1394         fns = (struct nwrap_module_nss_fns *)malloc(sizeof(struct nwrap_module_nss_fns));
1395         if (!fns) {
1396                 return NULL;
1397         }
1398
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");
1421
1422         return fns;
1423 }
1424
1425 static void *nwrap_load_module(const char *so_path)
1426 {
1427         void *h;
1428
1429         if (!so_path || !strlen(so_path)) {
1430                 return NULL;
1431         }
1432
1433         h = dlopen(so_path, RTLD_LAZY);
1434         if (!h) {
1435                 NWRAP_LOG(NWRAP_LOG_ERROR,
1436                           "Cannot open shared library %s",
1437                           so_path);
1438                 return NULL;
1439         }
1440
1441         return h;
1442 }
1443
1444 static bool nwrap_module_init(const char *name,
1445                               struct nwrap_ops *ops,
1446                               const char *so_path,
1447                               int *num_backends,
1448                               struct nwrap_backend **backends)
1449 {
1450         struct nwrap_backend *b;
1451
1452         *backends = (struct nwrap_backend *)realloc(*backends,
1453                 sizeof(struct nwrap_backend) * ((*num_backends) + 1));
1454         if (!*backends) {
1455                 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
1456                 return false;
1457         }
1458
1459         b = &((*backends)[*num_backends]);
1460
1461         b->name = name;
1462         b->ops = ops;
1463         b->so_path = so_path;
1464
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) {
1469                         return false;
1470                 }
1471         } else {
1472                 b->so_handle = NULL;
1473                 b->fns = NULL;
1474         }
1475
1476         (*num_backends)++;
1477
1478         return true;
1479 }
1480
1481 static void nwrap_libc_init(struct nwrap_main *r)
1482 {
1483         r->libc = malloc(sizeof(struct nwrap_libc));
1484         if (r->libc == NULL) {
1485                 printf("Failed to allocate memory for libc");
1486                 exit(-1);
1487         }
1488         ZERO_STRUCTP(r->libc);
1489
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");
1493                 exit(-1);
1494         }
1495         ZERO_STRUCTP(r->libc->fns);
1496 }
1497
1498 static void nwrap_backend_init(struct nwrap_main *r)
1499 {
1500         const char *module_so_path = getenv("NSS_WRAPPER_MODULE_SO_PATH");
1501         const char *module_fn_name = getenv("NSS_WRAPPER_MODULE_FN_PREFIX");
1502
1503         r->num_backends = 0;
1504         r->backends = NULL;
1505
1506         if (!nwrap_module_init("files", &nwrap_files_ops, NULL,
1507                                &r->num_backends,
1508                                &r->backends)) {
1509                 NWRAP_LOG(NWRAP_LOG_ERROR,
1510                           "Failed to initialize 'files' backend");
1511                 return;
1512         }
1513
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,
1519                                        &nwrap_module_ops,
1520                                        module_so_path,
1521                                        &r->num_backends,
1522                                        &r->backends)) {
1523                         NWRAP_LOG(NWRAP_LOG_ERROR,
1524                                   "Failed to initialize '%s' backend",
1525                                   module_fn_name);
1526                         return;
1527                 }
1528         }
1529 }
1530
1531 static void nwrap_init(void)
1532 {
1533         const char *env;
1534         char *endptr;
1535         size_t max_hostents_tmp;
1536
1537         NWRAP_LOCK(nwrap_initialized);
1538         if (nwrap_initialized) {
1539                 NWRAP_UNLOCK(nwrap_initialized);
1540                 return;
1541         }
1542
1543         /*
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.
1547          */
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);
1553
1554         nwrap_initialized = true;
1555
1556         /* Initialize pthread_atfork handlers */
1557         pthread_atfork(&nwrap_thread_prepare, &nwrap_thread_parent,
1558                        &nwrap_thread_child);
1559
1560         env = getenv("NSS_WRAPPER_MAX_HOSTENTS");
1561         if (env != NULL) {
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);
1570                 } else {
1571                         max_hostents = max_hostents_tmp;
1572                 }
1573         }
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");
1581                 goto done;
1582         }
1583
1584         nwrap_main_global = &__nwrap_main_global;
1585
1586         nwrap_libc_init(nwrap_main_global);
1587
1588         nwrap_backend_init(nwrap_main_global);
1589
1590         /* passwd */
1591         nwrap_pw_global.cache = &__nwrap_cache_pw;
1592
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;
1599
1600         /* shadow */
1601 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
1602         nwrap_sp_global.cache = &__nwrap_cache_sp;
1603
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) */
1611
1612         /* group */
1613         nwrap_gr_global.cache = &__nwrap_cache_gr;
1614
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;
1621
1622         /* hosts */
1623         nwrap_he_global.cache = &__nwrap_cache_he;
1624
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;
1631
1632 done:
1633         /* We hold all locks here so we can use NWRAP_UNLOCK_ALL. */
1634         NWRAP_UNLOCK_ALL;
1635 }
1636
1637 bool nss_wrapper_enabled(void)
1638 {
1639         nwrap_init();
1640
1641         if (nwrap_pw_global.cache->path == NULL ||
1642             nwrap_pw_global.cache->path[0] == '\0') {
1643                 return false;
1644         }
1645         if (nwrap_gr_global.cache->path == NULL ||
1646             nwrap_gr_global.cache->path[0] == '\0') {
1647                 return false;
1648         }
1649
1650         return true;
1651 }
1652
1653 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
1654 bool nss_wrapper_shadow_enabled(void)
1655 {
1656         nwrap_init();
1657
1658         if (nwrap_sp_global.cache->path == NULL ||
1659             nwrap_sp_global.cache->path[0] == '\0') {
1660                 return false;
1661         }
1662
1663         return true;
1664 }
1665 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
1666
1667 bool nss_wrapper_hosts_enabled(void)
1668 {
1669         nwrap_init();
1670
1671         if (nwrap_he_global.cache->path == NULL ||
1672             nwrap_he_global.cache->path[0] == '\0') {
1673                 return false;
1674         }
1675
1676         return true;
1677 }
1678
1679 static bool nwrap_hostname_enabled(void)
1680 {
1681         nwrap_init();
1682
1683         if (getenv("NSS_WRAPPER_HOSTNAME") == NULL) {
1684                 return false;
1685         }
1686
1687         return true;
1688 }
1689
1690 static bool nwrap_parse_file(struct nwrap_cache *nwrap)
1691 {
1692         char *line = NULL;
1693         ssize_t n;
1694         /* Unused but getline needs it */
1695         size_t len;
1696         bool ok;
1697
1698         if (nwrap->st.st_size == 0) {
1699                 NWRAP_LOG(NWRAP_LOG_DEBUG, "size == 0");
1700                 return true;
1701         }
1702
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);
1708                 return false;
1709         }
1710
1711         rewind(nwrap->fp);
1712
1713         do {
1714                 n = getline(&line, &len, nwrap->fp);
1715                 if (n < 0) {
1716                         SAFE_FREE(line);
1717                         if (feof(nwrap->fp)) {
1718                                 break;
1719                         }
1720
1721                         NWRAP_LOG(NWRAP_LOG_ERROR,
1722                                   "Unable to read line from file: %s",
1723                                   nwrap->path);
1724                         return false;
1725                 }
1726
1727                 if (line[n - 1] == '\n') {
1728                         line[n - 1] = '\0';
1729                 }
1730
1731                 if (line[0] == '\0') {
1732                         SAFE_FREE(line);
1733                         continue;
1734                 }
1735
1736                 ok = nwrap->parse_line(nwrap, line);
1737                 if (!ok) {
1738                         NWRAP_LOG(NWRAP_LOG_ERROR,
1739                                   "Unable to parse line file: %s",
1740                                   line);
1741                         SAFE_FREE(line);
1742                         return false;
1743                 }
1744
1745                 /* Line is parsed without issues so add it to list */
1746                 ok = nwrap_vector_add_item(&(nwrap->lines), (void *const) line);
1747                 if (!ok) {
1748                         NWRAP_LOG(NWRAP_LOG_ERROR,
1749                                   "Unable to add line to vector");
1750                         return false;
1751                 }
1752
1753                 /* This forces getline to allocate new memory for line. */
1754                 line = NULL;
1755         } while (!feof(nwrap->fp));
1756
1757         return true;
1758 }
1759
1760 static void nwrap_files_cache_unload(struct nwrap_cache *nwrap)
1761 {
1762         nwrap->unload(nwrap);
1763
1764         nwrap_lines_unload(nwrap);
1765 }
1766
1767 static bool nwrap_files_cache_reload(struct nwrap_cache *nwrap)
1768 {
1769         struct stat st;
1770         int ret;
1771         bool ok;
1772         bool retried = false;
1773
1774         assert(nwrap != NULL);
1775
1776 reopen:
1777         if (nwrap->fd < 0) {
1778                 nwrap->fp = fopen(nwrap->path, "re");
1779                 if (nwrap->fp == NULL) {
1780                         nwrap->fd = -1;
1781                         NWRAP_LOG(NWRAP_LOG_ERROR,
1782                                   "Unable to open '%s' readonly %d:%s",
1783                                   nwrap->path, nwrap->fd,
1784                                   strerror(errno));
1785                         return false;
1786
1787                 }
1788                 nwrap->fd = fileno(nwrap->fp);
1789                 NWRAP_LOG(NWRAP_LOG_DEBUG, "Open '%s'", nwrap->path);
1790         }
1791
1792         ret = fstat(nwrap->fd, &st);
1793         if (ret != 0) {
1794                 NWRAP_LOG(NWRAP_LOG_ERROR,
1795                           "fstat(%s) - %d:%s",
1796                           nwrap->path,
1797                           ret,
1798                           strerror(errno));
1799                 fclose(nwrap->fp);
1800                 nwrap->fp = NULL;
1801                 nwrap->fd = -1;
1802                 return false;
1803         }
1804
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",
1809                           nwrap->path);
1810                 retried = true;
1811                 memset(&nwrap->st, 0, sizeof(nwrap->st));
1812                 fclose(nwrap->fp);
1813                 nwrap->fp = NULL;
1814                 nwrap->fd = -1;
1815                 goto reopen;
1816         }
1817
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);
1822                 return true;
1823         }
1824
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);
1829
1830         nwrap->st = st;
1831
1832         nwrap_files_cache_unload(nwrap);
1833
1834         ok = nwrap_parse_file(nwrap);
1835         if (!ok) {
1836                 NWRAP_LOG(NWRAP_LOG_ERROR, "Failed to reload %s", nwrap->path);
1837                 nwrap_files_cache_unload(nwrap);
1838                 return false;
1839         }
1840
1841         NWRAP_LOG(NWRAP_LOG_TRACE, "Reloaded %s", nwrap->path);
1842         return true;
1843 }
1844
1845 /*
1846  * the caller has to call nwrap_unload() on failure
1847  */
1848 static bool nwrap_pw_parse_line(struct nwrap_cache *nwrap, char *line)
1849 {
1850         struct nwrap_pw *nwrap_pw;
1851         char *c;
1852         char *p;
1853         char *e;
1854         struct passwd *pw;
1855         size_t list_size;
1856
1857         nwrap_pw = (struct nwrap_pw *)nwrap->private_data;
1858
1859         list_size = sizeof(*nwrap_pw->list) * (nwrap_pw->num+1);
1860         pw = (struct passwd *)realloc(nwrap_pw->list, list_size);
1861         if (!pw) {
1862                 NWRAP_LOG(NWRAP_LOG_ERROR,
1863                           "realloc(%u) failed",
1864                           (unsigned)list_size);
1865                 return false;
1866         }
1867         nwrap_pw->list = pw;
1868
1869         pw = &nwrap_pw->list[nwrap_pw->num];
1870
1871         c = line;
1872
1873         /* name */
1874         p = strchr(c, ':');
1875         if (!p) {
1876                 NWRAP_LOG(NWRAP_LOG_ERROR,
1877                           "Invalid line[%s]: '%s'",
1878                           line,
1879                           c);
1880                 return false;
1881         }
1882         *p = '\0';
1883         p++;
1884         pw->pw_name = c;
1885         c = p;
1886
1887         NWRAP_LOG(NWRAP_LOG_TRACE, "name[%s]\n", pw->pw_name);
1888
1889         /* password */
1890         p = strchr(c, ':');
1891         if (!p) {
1892                 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
1893                 return false;
1894         }
1895         *p = '\0';
1896         p++;
1897         pw->pw_passwd = c;
1898         c = p;
1899
1900         NWRAP_LOG(NWRAP_LOG_TRACE, "password[%s]\n", pw->pw_passwd);
1901
1902         /* uid */
1903         p = strchr(c, ':');
1904         if (!p) {
1905                 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
1906                 return false;
1907         }
1908         *p = '\0';
1909         p++;
1910         e = NULL;
1911         pw->pw_uid = (uid_t)strtoul(c, &e, 10);
1912         if (c == e) {
1913                 NWRAP_LOG(NWRAP_LOG_ERROR,
1914                           "Invalid line[%s]: '%s' - %s",
1915                           line, c, strerror(errno));
1916                 return false;
1917         }
1918         if (e == NULL) {
1919                 NWRAP_LOG(NWRAP_LOG_ERROR,
1920                           "Invalid line[%s]: '%s' - %s",
1921                           line, c, strerror(errno));
1922                 return false;
1923         }
1924         if (e[0] != '\0') {
1925                 NWRAP_LOG(NWRAP_LOG_ERROR,
1926                           "Invalid line[%s]: '%s' - %s",
1927                           line, c, strerror(errno));
1928                 return false;
1929         }
1930         c = p;
1931
1932         NWRAP_LOG(NWRAP_LOG_TRACE, "uid[%u]", pw->pw_uid);
1933
1934         /* gid */
1935         p = strchr(c, ':');
1936         if (!p) {
1937                 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
1938                 return false;
1939         }
1940         *p = '\0';
1941         p++;
1942         e = NULL;
1943         pw->pw_gid = (gid_t)strtoul(c, &e, 10);
1944         if (c == e) {
1945                 NWRAP_LOG(NWRAP_LOG_ERROR,
1946                           "Invalid line[%s]: '%s' - %s",
1947                           line, c, strerror(errno));
1948                 return false;
1949         }
1950         if (e == NULL) {
1951                 NWRAP_LOG(NWRAP_LOG_ERROR,
1952                           "Invalid line[%s]: '%s' - %s",
1953                           line, c, strerror(errno));
1954                 return false;
1955         }
1956         if (e[0] != '\0') {
1957                 NWRAP_LOG(NWRAP_LOG_ERROR,
1958                           "Invalid line[%s]: '%s' - %s",
1959                           line, c, strerror(errno));
1960                 return false;
1961         }
1962         c = p;
1963
1964         NWRAP_LOG(NWRAP_LOG_TRACE, "gid[%u]\n", pw->pw_gid);
1965
1966         /* gecos */
1967         p = strchr(c, ':');
1968         if (!p) {
1969                 NWRAP_LOG(NWRAP_LOG_ERROR, "invalid line[%s]: '%s'", line, c);
1970                 return false;
1971         }
1972         *p = '\0';
1973         p++;
1974         pw->pw_gecos = c;
1975         c = p;
1976
1977         NWRAP_LOG(NWRAP_LOG_TRACE, "gecos[%s]", pw->pw_gecos);
1978
1979         /* dir */
1980         p = strchr(c, ':');
1981         if (!p) {
1982                 NWRAP_LOG(NWRAP_LOG_ERROR, "'%s'", c);
1983                 return false;
1984         }
1985         *p = '\0';
1986         p++;
1987         pw->pw_dir = c;
1988         c = p;
1989
1990         NWRAP_LOG(NWRAP_LOG_TRACE, "dir[%s]", pw->pw_dir);
1991
1992         /* shell */
1993         pw->pw_shell = c;
1994         NWRAP_LOG(NWRAP_LOG_TRACE, "shell[%s]", pw->pw_shell);
1995
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);
2001
2002         nwrap_pw->num++;
2003         return true;
2004 }
2005
2006 static void nwrap_pw_unload(struct nwrap_cache *nwrap)
2007 {
2008         struct nwrap_pw *nwrap_pw;
2009         nwrap_pw = (struct nwrap_pw *)nwrap->private_data;
2010
2011         SAFE_FREE(nwrap_pw->list);
2012         nwrap_pw->num = 0;
2013         nwrap_pw->idx = 0;
2014 }
2015
2016 static int nwrap_pw_copy_r(const struct passwd *src, struct passwd *dst,
2017                            char *buf, size_t buflen, struct passwd **dstp)
2018 {
2019         char *first;
2020         char *last;
2021         off_t ofs;
2022
2023         first = src->pw_name;
2024
2025         last = src->pw_shell;
2026         while (*last) last++;
2027
2028         ofs = PTR_DIFF(last + 1, first);
2029
2030         if (ofs > (off_t) buflen) {
2031                 return ERANGE;
2032         }
2033
2034         memcpy(buf, first, ofs);
2035
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;
2048
2049         if (dstp) {
2050                 *dstp = dst;
2051         }
2052
2053         return 0;
2054 }
2055
2056 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
2057 static bool nwrap_sp_parse_line(struct nwrap_cache *nwrap, char *line)
2058 {
2059         struct nwrap_sp *nwrap_sp;
2060         struct spwd *sp;
2061         size_t list_size;
2062         char *c;
2063         char *e;
2064         char *p;
2065
2066         nwrap_sp = (struct nwrap_sp *)nwrap->private_data;
2067
2068         list_size = sizeof(*nwrap_sp->list) * (nwrap_sp->num+1);
2069         sp = (struct spwd *)realloc(nwrap_sp->list, list_size);
2070         if (sp == NULL) {
2071                 NWRAP_LOG(NWRAP_LOG_ERROR,
2072                           "realloc(%u) failed",
2073                           (unsigned)list_size);
2074                 return false;
2075         }
2076         nwrap_sp->list = sp;
2077
2078         sp = &nwrap_sp->list[nwrap_sp->num];
2079
2080         c = line;
2081
2082         /* name */
2083         p = strchr(c, ':');
2084         if (p == NULL) {
2085                 NWRAP_LOG(NWRAP_LOG_ERROR,
2086                           "name -- Invalid line[%s]: '%s'",
2087                           line,
2088                           c);
2089                 return false;
2090         }
2091         *p = '\0';
2092         p++;
2093         sp->sp_namp = c;
2094         c = p;
2095
2096         NWRAP_LOG(NWRAP_LOG_TRACE, "name[%s]\n", sp->sp_namp);
2097
2098         /* pwd */
2099         p = strchr(c, ':');
2100         if (p == NULL) {
2101                 NWRAP_LOG(NWRAP_LOG_ERROR,
2102                           "pwd -- Invalid line[%s]: '%s'",
2103                           line,
2104                           c);
2105                 return false;
2106         }
2107         *p = '\0';
2108         p++;
2109         sp->sp_pwdp = c;
2110         c = p;
2111
2112         /* lstchg (long) */
2113         if (c[0] == ':') {
2114                 sp->sp_lstchg = -1;
2115                 p++;
2116         } else {
2117                 p = strchr(c, ':');
2118                 if (p == NULL) {
2119                         NWRAP_LOG(NWRAP_LOG_ERROR,
2120                                   "lstchg -- Invalid line[%s]: '%s'",
2121                                   line,
2122                                   c);
2123                         return false;
2124                 }
2125                 *p = '\0';
2126                 p++;
2127                 sp->sp_lstchg = strtol(c, &e, 10);
2128                 if (c == e) {
2129                         NWRAP_LOG(NWRAP_LOG_ERROR,
2130                                   "lstchg -- Invalid line[%s]: '%s' - %s",
2131                                   line, c, strerror(errno));
2132                         return false;
2133                 }
2134                 if (e == NULL) {
2135                         NWRAP_LOG(NWRAP_LOG_ERROR,
2136                                   "lstchg -- Invalid line[%s]: '%s' - %s",
2137                                   line, c, strerror(errno));
2138                         return false;
2139                 }
2140                 if (e[0] != '\0') {
2141                         NWRAP_LOG(NWRAP_LOG_ERROR,
2142                                   "lstchg -- Invalid line[%s]: '%s' - %s",
2143                                   line, c, strerror(errno));
2144                         return false;
2145                 }
2146         }
2147         c = p;
2148
2149         /* min (long) */
2150         if (c[0] == ':') {
2151                 sp->sp_min = -1;
2152                 p++;
2153         } else {
2154                 p = strchr(c, ':');
2155                 if (p == NULL) {
2156                         NWRAP_LOG(NWRAP_LOG_ERROR,
2157                                   "min -- Invalid line[%s]: '%s'",
2158                                   line,
2159                                   c);
2160                         return false;
2161                 }
2162                 *p = '\0';
2163                 p++;
2164                 sp->sp_min = strtol(c, &e, 10);
2165                 if (c == e) {
2166                         NWRAP_LOG(NWRAP_LOG_ERROR,
2167                                   "min -- Invalid line[%s]: '%s' - %s",
2168                                   line, c, strerror(errno));
2169                         return false;
2170                 }
2171                 if (e == NULL) {
2172                         NWRAP_LOG(NWRAP_LOG_ERROR,
2173                                   "min -- Invalid line[%s]: '%s' - %s",
2174                                   line, c, strerror(errno));
2175                         return false;
2176                 }
2177                 if (e[0] != '\0') {
2178                         NWRAP_LOG(NWRAP_LOG_ERROR,
2179                                   "min -- Invalid line[%s]: '%s' - %s",
2180                                   line, c, strerror(errno));
2181                         return false;
2182                 }
2183         }
2184         c = p;
2185
2186         /* max (long) */
2187         if (c[0] == ':') {
2188                 sp->sp_max = -1;
2189                 p++;
2190         } else {
2191                 p = strchr(c, ':');
2192                 if (p == NULL) {
2193                         NWRAP_LOG(NWRAP_LOG_ERROR,
2194                                   "max -- Invalid line[%s]: '%s'",
2195                                   line,
2196                                   c);
2197                         return false;
2198                 }
2199                 *p = '\0';
2200                 p++;
2201                 sp->sp_max = strtol(c, &e, 10);
2202                 if (c == e) {
2203                         NWRAP_LOG(NWRAP_LOG_ERROR,
2204                                   "max -- Invalid line[%s]: '%s' - %s",
2205                                   line, c, strerror(errno));
2206                         return false;
2207                 }
2208                 if (e == NULL) {
2209                         NWRAP_LOG(NWRAP_LOG_ERROR,
2210                                   "max -- Invalid line[%s]: '%s' - %s",
2211                                   line, c, strerror(errno));
2212                         return false;
2213                 }
2214                 if (e[0] != '\0') {
2215                         NWRAP_LOG(NWRAP_LOG_ERROR,
2216                                   "max -- Invalid line[%s]: '%s' - %s",
2217                                   line, c, strerror(errno));
2218                         return false;
2219                 }
2220         }
2221         c = p;
2222
2223         /* warn (long) */
2224         if (c[0] == ':') {
2225                 sp->sp_warn = -1;
2226                 p++;
2227         } else {
2228                 p = strchr(c, ':');
2229                 if (p == NULL) {
2230                         NWRAP_LOG(NWRAP_LOG_ERROR,
2231                                   "warn -- Invalid line[%s]: '%s'",
2232                                   line,
2233                                   c);
2234                         return false;
2235                 }
2236                 *p = '\0';
2237                 p++;
2238                 sp->sp_warn = strtol(c, &e, 10);
2239                 if (c == e) {
2240                         NWRAP_LOG(NWRAP_LOG_ERROR,
2241                                   "warn -- Invalid line[%s]: '%s' - %s",
2242                                   line, c, strerror(errno));
2243                         return false;
2244                 }
2245                 if (e == NULL) {
2246                         NWRAP_LOG(NWRAP_LOG_ERROR,
2247                                   "warn -- Invalid line[%s]: '%s' - %s",
2248                                   line, c, strerror(errno));
2249                         return false;
2250                 }
2251                 if (e[0] != '\0') {
2252                         NWRAP_LOG(NWRAP_LOG_ERROR,
2253                                   "warn -- Invalid line[%s]: '%s' - %s",
2254                                   line, c, strerror(errno));
2255                         return false;
2256                 }
2257         }
2258         c = p;
2259
2260         /* inact (long) */
2261         if (c[0] == ':') {
2262                 sp->sp_inact = -1;
2263                 p++;
2264         } else {
2265                 p = strchr(c, ':');
2266                 if (p == NULL) {
2267                         NWRAP_LOG(NWRAP_LOG_ERROR,
2268                                   "inact -- Invalid line[%s]: '%s'",
2269                                   line,
2270                                   c);
2271                         return false;
2272                 }
2273                 *p = '\0';
2274                 p++;
2275                 sp->sp_inact = strtol(c, &e, 10);
2276                 if (c == e) {
2277                         NWRAP_LOG(NWRAP_LOG_ERROR,
2278                                   "inact -- Invalid line[%s]: '%s' - %s",
2279                                   line, c, strerror(errno));
2280                         return false;
2281                 }
2282                 if (e == NULL) {
2283                         NWRAP_LOG(NWRAP_LOG_ERROR,
2284                                   "inact -- Invalid line[%s]: '%s' - %s",
2285                                   line, c, strerror(errno));
2286                         return false;
2287                 }
2288                 if (e[0] != '\0') {
2289                         NWRAP_LOG(NWRAP_LOG_ERROR,
2290                                   "inact -- Invalid line[%s]: '%s' - %s",
2291                                   line, c, strerror(errno));
2292                         return false;
2293                 }
2294         }
2295         c = p;
2296
2297         /* expire (long) */
2298         if (c[0] == ':') {
2299                 sp->sp_expire = -1;
2300                 p++;
2301         } else {
2302                 p = strchr(c, ':');
2303                 if (p == NULL) {
2304                         NWRAP_LOG(NWRAP_LOG_ERROR,
2305                                   "expire -- Invalid line[%s]: '%s'",
2306                                   line,
2307                                   c);
2308                         return false;
2309                 }
2310                 *p = '\0';
2311                 p++;
2312                 sp->sp_expire = strtol(c, &e, 10);
2313                 if (c == e) {
2314                         NWRAP_LOG(NWRAP_LOG_ERROR,
2315                                   "expire -- Invalid line[%s]: '%s' - %s",
2316                                   line, c, strerror(errno));
2317                         return false;
2318                 }
2319                 if (e == NULL) {
2320                         NWRAP_LOG(NWRAP_LOG_ERROR,
2321                                   "expire -- Invalid line[%s]: '%s' - %s",
2322                                   line, c, strerror(errno));
2323                         return false;
2324                 }
2325                 if (e[0] != '\0') {
2326                         NWRAP_LOG(NWRAP_LOG_ERROR,
2327                                   "expire -- Invalid line[%s]: '%s' - %s",
2328                                   line, c, strerror(errno));
2329                         return false;
2330                 }
2331         }
2332         c = p;
2333
2334         nwrap_sp->num++;
2335         return true;
2336 }
2337
2338 static void nwrap_sp_unload(struct nwrap_cache *nwrap)
2339 {
2340         struct nwrap_sp *nwrap_sp;
2341         nwrap_sp = (struct nwrap_sp *)nwrap->private_data;
2342
2343         SAFE_FREE(nwrap_sp->list);
2344         nwrap_sp->num = 0;
2345         nwrap_sp->idx = 0;
2346 }
2347 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
2348
2349 /*
2350  * the caller has to call nwrap_unload() on failure
2351  */
2352 static bool nwrap_gr_parse_line(struct nwrap_cache *nwrap, char *line)
2353 {
2354         struct nwrap_gr *nwrap_gr;
2355         char *c;
2356         char *p;
2357         char *e;
2358         struct group *gr;
2359         size_t list_size;
2360         unsigned nummem;
2361
2362         nwrap_gr = (struct nwrap_gr *)nwrap->private_data;
2363
2364         list_size = sizeof(*nwrap_gr->list) * (nwrap_gr->num+1);
2365         gr = (struct group *)realloc(nwrap_gr->list, list_size);
2366         if (!gr) {
2367                 NWRAP_LOG(NWRAP_LOG_ERROR, "realloc failed");
2368                 return false;
2369         }
2370         nwrap_gr->list = gr;
2371
2372         gr = &nwrap_gr->list[nwrap_gr->num];
2373
2374         c = line;
2375
2376         /* name */
2377         p = strchr(c, ':');
2378         if (!p) {
2379                 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
2380                 return false;
2381         }
2382         *p = '\0';
2383         p++;
2384         gr->gr_name = c;
2385         c = p;
2386
2387         NWRAP_LOG(NWRAP_LOG_TRACE, "name[%s]", gr->gr_name);
2388
2389         /* password */
2390         p = strchr(c, ':');
2391         if (!p) {
2392                 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
2393                 return false;
2394         }
2395         *p = '\0';
2396         p++;
2397         gr->gr_passwd = c;
2398         c = p;
2399
2400         NWRAP_LOG(NWRAP_LOG_TRACE, "password[%s]", gr->gr_passwd);
2401
2402         /* gid */
2403         p = strchr(c, ':');
2404         if (!p) {
2405                 NWRAP_LOG(NWRAP_LOG_ERROR, "Invalid line[%s]: '%s'", line, c);
2406                 return false;
2407         }
2408         *p = '\0';
2409         p++;
2410         e = NULL;
2411         gr->gr_gid = (gid_t)strtoul(c, &e, 10);
2412         if (c == e) {
2413                 NWRAP_LOG(NWRAP_LOG_ERROR,
2414                           "Invalid line[%s]: '%s' - %s",
2415                           line, c, strerror(errno));
2416                 return false;
2417         }
2418         if (e == NULL) {
2419                 NWRAP_LOG(NWRAP_LOG_ERROR,
2420                           "Invalid line[%s]: '%s' - %s",
2421                           line, c, strerror(errno));
2422                 return false;
2423         }
2424         if (e[0] != '\0') {
2425                 NWRAP_LOG(NWRAP_LOG_ERROR,
2426                           "Invalid line[%s]: '%s' - %s",
2427                           line, c, strerror(errno));
2428                 return false;
2429         }
2430         c = p;
2431
2432         NWRAP_LOG(NWRAP_LOG_TRACE, "gid[%u]", gr->gr_gid);
2433
2434         /* members */
2435         gr->gr_mem = (char **)malloc(sizeof(char *));
2436         if (!gr->gr_mem) {
2437                 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
2438                 return false;
2439         }
2440         gr->gr_mem[0] = NULL;
2441
2442         for(nummem=0; p; nummem++) {
2443                 char **m;
2444                 size_t m_size;
2445                 c = p;
2446                 p = strchr(c, ',');
2447                 if (p) {
2448                         *p = '\0';
2449                         p++;
2450                 }
2451
2452                 if (strlen(c) == 0) {
2453                         break;
2454                 }
2455
2456                 m_size = sizeof(char *) * (nummem+2);
2457                 m = (char **)realloc(gr->gr_mem, m_size);
2458                 if (!m) {
2459                         NWRAP_LOG(NWRAP_LOG_ERROR,
2460                                   "realloc(%zd) failed",
2461                                   m_size);
2462                         return false;
2463                 }
2464                 gr->gr_mem = m;
2465                 gr->gr_mem[nummem] = c;
2466                 gr->gr_mem[nummem+1] = NULL;
2467
2468                 NWRAP_LOG(NWRAP_LOG_TRACE,
2469                           "member[%u]: '%s'",
2470                           nummem, gr->gr_mem[nummem]);
2471         }
2472
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);
2476
2477         nwrap_gr->num++;
2478         return true;
2479 }
2480
2481 static void nwrap_gr_unload(struct nwrap_cache *nwrap)
2482 {
2483         int i;
2484         struct nwrap_gr *nwrap_gr;
2485         nwrap_gr = (struct nwrap_gr *)nwrap->private_data;
2486
2487         if (nwrap_gr->list) {
2488                 for (i=0; i < nwrap_gr->num; i++) {
2489                         SAFE_FREE(nwrap_gr->list[i].gr_mem);
2490                 }
2491                 SAFE_FREE(nwrap_gr->list);
2492         }
2493
2494         nwrap_gr->num = 0;
2495         nwrap_gr->idx = 0;
2496 }
2497
2498 static int nwrap_gr_copy_r(const struct group *src, struct group *dst,
2499                            char *buf, size_t buflen, struct group **dstp)
2500 {
2501         char *first;
2502         char **lastm;
2503         char *last = NULL;
2504         off_t ofsb;
2505         off_t ofsm;
2506         off_t ofs;
2507         unsigned i;
2508
2509         first = src->gr_name;
2510
2511         lastm = src->gr_mem;
2512         while (*lastm) {
2513                 last = *lastm;
2514                 lastm++;
2515         }
2516
2517         if (last == NULL) {
2518                 last = src->gr_passwd;
2519         }
2520         while (*last) last++;
2521
2522         ofsb = PTR_DIFF(last + 1, first);
2523         ofsm = PTR_DIFF(lastm + 1, src->gr_mem);
2524
2525         if ((ofsb + ofsm) > (off_t) buflen) {
2526                 return ERANGE;
2527         }
2528
2529         memcpy(buf, first, ofsb);
2530         memcpy(buf + ofsb, src->gr_mem, ofsm);
2531
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;
2537
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;
2542         }
2543
2544         if (dstp) {
2545                 *dstp = dst;
2546         }
2547
2548         return 0;
2549 }
2550
2551 static struct nwrap_entlist *nwrap_entlist_init(struct nwrap_entdata *ed)
2552 {
2553         struct nwrap_entlist *el;
2554
2555         if (ed == NULL) {
2556                 NWRAP_LOG(NWRAP_LOG_ERROR,
2557                           "entry is NULL, can't create list item");
2558                 return NULL;
2559         }
2560
2561         el = (struct nwrap_entlist *)malloc(sizeof(struct nwrap_entlist));
2562         if (el == NULL) {
2563                 NWRAP_LOG(NWRAP_LOG_ERROR, "malloc failed");
2564                 return NULL;
2565         }
2566
2567         el->next = NULL;
2568         el->ed = ed;
2569
2570         return el;
2571 }
2572
2573 static bool nwrap_ed_inventarize_add_new(char *const h_name,
2574                                          struct nwrap_entdata *const ed)
2575 {
2576         ENTRY e;
2577         ENTRY *p;
2578         struct nwrap_entlist *el;
2579         bool ok;
2580
2581         if (h_name == NULL) {
2582                 NWRAP_LOG(NWRAP_LOG_ERROR, "h_name NULL - can't add");
2583                 return false;
2584         }
2585
2586         el = nwrap_entlist_init(ed);
2587         if (el == NULL) {
2588                 return false;
2589         }
2590
2591         e.key = h_name;
2592         e.data = (void *)el;
2593
2594         p = hsearch(e, ENTER);
2595         if (p == NULL) {
2596                 NWRAP_LOG(NWRAP_LOG_ERROR, "Hash table is full!");
2597                 return false;
2598         }
2599
2600         ok = nwrap_vector_add_item(&(nwrap_he_global.lists), (void *)el);
2601         if (!ok) {
2602                 NWRAP_LOG(NWRAP_LOG_ERROR,
2603                           "Failed to add list entry to vector.");
2604                 return false;
2605         }
2606
2607         return true;
2608 }
2609
2610 static bool nwrap_ed_inventarize_add_to_existing(struct nwrap_entdata *const ed,
2611                                                  struct nwrap_entlist *const el)
2612 {
2613         struct nwrap_entlist *cursor;
2614         struct nwrap_entlist *el_new;
2615
2616         if (el == NULL) {
2617                 NWRAP_LOG(NWRAP_LOG_ERROR, "list is NULL, can not add");
2618                 return false;
2619         }
2620
2621
2622         for (cursor = el; cursor->next != NULL; cursor = cursor->next)
2623         {
2624                 if (cursor->ed == ed) {
2625                         return false;
2626                 }
2627         }
2628
2629         if (cursor->ed == ed) {
2630                 return false;
2631         }
2632
2633         el_new = nwrap_entlist_init(ed);
2634         if (el_new == NULL) {
2635                 return false;
2636         }
2637
2638         cursor->next = el_new;
2639         return true;
2640 }
2641
2642 static bool nwrap_ed_inventarize(char *const name,
2643                                  struct nwrap_entdata *const ed)
2644 {
2645         ENTRY e;
2646         ENTRY *p;
2647         bool ok;
2648
2649         e.key = name;
2650         e.data = NULL;
2651
2652         NWRAP_LOG(NWRAP_LOG_DEBUG, "Searching name: %s", e.key);
2653
2654         p = hsearch(e, FIND);
2655         if (p == NULL) {
2656                 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s not found. Adding...", name);
2657                 ok = nwrap_ed_inventarize_add_new(name, ed);
2658         } else {
2659                 struct nwrap_entlist *el = (struct nwrap_entlist *)p->data;
2660
2661                 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s found. Add record to list.", name);
2662                 ok = nwrap_ed_inventarize_add_to_existing(ed, el);
2663         }
2664
2665         return ok;
2666 }
2667
2668 static bool nwrap_add_hname(struct nwrap_entdata *const ed)
2669 {
2670         char *const h_name = (char *const)(ed->ht.h_name);
2671         unsigned i;
2672         bool ok;
2673
2674         ok = nwrap_ed_inventarize(h_name, ed);
2675         if (!ok) {
2676                 return false;
2677         }
2678
2679         if (ed->ht.h_aliases == NULL) {
2680                 return true;
2681         }
2682
2683         /* Itemize aliases */
2684         for (i = 0; ed->ht.h_aliases[i] != NULL; ++i) {
2685                 char *h_name_alias;
2686
2687                 h_name_alias = ed->ht.h_aliases[i];
2688
2689                 NWRAP_LOG(NWRAP_LOG_DEBUG, "Add alias: %s", h_name_alias);
2690
2691                 if (!nwrap_ed_inventarize(h_name_alias, ed)) {
2692                         NWRAP_LOG(NWRAP_LOG_ERROR,
2693                                   "Unable to add alias: %s", h_name_alias);
2694                         return false;
2695                 }
2696         }
2697
2698         return true;
2699 }
2700
2701 static bool nwrap_he_parse_line(struct nwrap_cache *nwrap, char *line)
2702 {
2703         struct nwrap_he *nwrap_he = (struct nwrap_he *)nwrap->private_data;
2704         bool do_aliases = true;
2705         ssize_t aliases_count = 0;
2706         char *p;
2707         char *i;
2708         char *n;
2709
2710         char *ip;
2711         bool ok;
2712
2713         struct nwrap_entdata *ed = (struct nwrap_entdata *)
2714                                    malloc(sizeof(struct nwrap_entdata));
2715         if (ed == NULL) {
2716                 NWRAP_LOG(NWRAP_LOG_ERROR,
2717                           "Unable to allocate memory for nwrap_entdata");
2718                 return false;
2719         }
2720         ZERO_STRUCTP(ed);
2721
2722         i = line;
2723
2724         /*
2725          * IP
2726          */
2727
2728         /* Walk to first char */
2729         for (p = i; *p != '.' && *p != ':' && !isxdigit((int) *p); p++) {
2730                 if (*p == '\0') {
2731                         NWRAP_LOG(NWRAP_LOG_ERROR,
2732                                   "Invalid line[%s]: '%s'",
2733                                   line, i);
2734                         free(ed);
2735                         return false;
2736                 }
2737         }
2738
2739         for (i = p; !isspace((int)*p); p++) {
2740                 if (*p == '\0') {
2741                         NWRAP_LOG(NWRAP_LOG_ERROR,
2742                                   "Invalid line[%s]: '%s'",
2743                                   line, i);
2744                         free(ed);
2745                         return false;
2746                 }
2747         }
2748
2749         *p = '\0';
2750
2751         if (inet_pton(AF_INET, i, ed->addr.host_addr)) {
2752                 ed->ht.h_addrtype = AF_INET;
2753                 ed->ht.h_length = 4;
2754 #ifdef HAVE_IPV6
2755         } else if (inet_pton(AF_INET6, i, ed->addr.host_addr)) {
2756                 ed->ht.h_addrtype = AF_INET6;
2757                 ed->ht.h_length = 16;
2758 #endif
2759         } else {
2760                 NWRAP_LOG(NWRAP_LOG_ERROR,
2761                           "Invalid line[%s]: '%s'",
2762                           line, i);
2763
2764                 free(ed);
2765                 return false;
2766         }
2767         ip = i;
2768
2769         ok = nwrap_vector_add_item(&(ed->nwrap_addrdata),
2770                                    (void *const)ed->addr.host_addr);
2771         if (!ok) {
2772                 NWRAP_LOG(NWRAP_LOG_ERROR, "Unable to add addrdata to vector");
2773                 free(ed);
2774                 return false;
2775         }
2776         ed->ht.h_addr_list = nwrap_vector_head(&ed->nwrap_addrdata);
2777
2778         p++;
2779
2780         /*
2781          * FQDN
2782          */
2783
2784         /* Walk to first char */
2785         for (n = p; *p != '_' && !isalnum((int) *p); p++) {
2786                 if (*p == '\0') {
2787                         NWRAP_LOG(NWRAP_LOG_ERROR,
2788                                   "Invalid line[%s]: '%s'",
2789                                   line, n);
2790
2791                         free(ed);
2792                         return false;
2793                 }
2794         }
2795
2796         for (n = p; !isspace((int)*p); p++) {
2797                 if (*p == '\0') {
2798                         do_aliases = false;
2799                         break;
2800                 }
2801         }
2802
2803         *p = '\0';
2804
2805         /* Convert to lowercase. This operate on same memory region */
2806         str_tolower(n, n);
2807         ed->ht.h_name = n;
2808
2809         /* glib's getent always dereferences he->h_aliases */
2810         ed->ht.h_aliases = malloc(sizeof(char *));
2811         if (ed->ht.h_aliases == NULL) {
2812                 free(ed);
2813                 return false;
2814         }
2815         ed->ht.h_aliases[0] = NULL;
2816
2817         /*
2818          * Aliases
2819          */
2820         while (do_aliases) {
2821                 char **aliases;
2822                 char *a;
2823
2824                 p++;
2825
2826                 /* Walk to first char */
2827                 for (a = p; *p != '_' && !isalnum((int) *p); p++) {
2828                         if (*p == '\0') {
2829                                 do_aliases = false;
2830                                 break;
2831                         }
2832                 }
2833                 /* Only trailing spaces are left */
2834                 if (!do_aliases) {
2835                         break;
2836                 }
2837
2838                 for (a = p; !isspace((int)*p); p++) {
2839                         if (*p == '\0') {
2840                                 do_aliases = false;
2841                                 break;
2842                         }
2843                 }
2844
2845                 *p = '\0';
2846
2847                 aliases = realloc(ed->ht.h_aliases, sizeof(char *) * (aliases_count + 2));
2848                 if (aliases == NULL) {
2849                         free(ed);
2850                         return false;
2851                 }
2852                 ed->ht.h_aliases = aliases;
2853
2854                 str_tolower(a, a);
2855                 aliases[aliases_count] = a;
2856                 aliases[aliases_count + 1] = NULL;
2857
2858                 aliases_count += 1;
2859         }
2860
2861         ok = nwrap_vector_add_item(&(nwrap_he->entries), (void *const)ed);
2862         if (!ok) {
2863                 NWRAP_LOG(NWRAP_LOG_ERROR, "Unable to add entry to vector");
2864                 free(ed);
2865                 return false;
2866         }
2867
2868         ed->aliases_count = aliases_count;
2869         /* Inventarize item */
2870         ok = nwrap_add_hname(ed);
2871         if (!ok) {
2872                 return false;
2873         }
2874
2875         ok = nwrap_ed_inventarize(ip, ed);
2876         if (!ok) {
2877                 return false;
2878         }
2879
2880         nwrap_he->num++;
2881         return true;
2882 }
2883
2884 static void nwrap_he_unload(struct nwrap_cache *nwrap)
2885 {
2886         struct nwrap_he *nwrap_he =
2887                 (struct nwrap_he *)nwrap->private_data;
2888         struct nwrap_entdata *ed;
2889         struct nwrap_entlist *el;
2890         size_t i;
2891
2892         nwrap_vector_foreach (ed, nwrap_he->entries, i)
2893         {
2894                 SAFE_FREE(ed->nwrap_addrdata.items);
2895                 SAFE_FREE(ed->ht.h_aliases);
2896                 SAFE_FREE(ed);
2897         }
2898         SAFE_FREE(nwrap_he->entries.items);
2899         nwrap_he->entries.count = nwrap_he->entries.capacity = 0;
2900
2901         nwrap_vector_foreach(el, nwrap_he->lists, i)
2902         {
2903                 while (el != NULL) {
2904                         struct nwrap_entlist *el_next;
2905
2906                         el_next = el->next;
2907                         SAFE_FREE(el);
2908                         el = el_next;
2909                 }
2910         }
2911         SAFE_FREE(nwrap_he->lists.items);
2912         nwrap_he->lists.count = nwrap_he->lists.capacity = 0;
2913
2914         nwrap_he->num = 0;
2915         nwrap_he->idx = 0;
2916 }
2917
2918
2919 /* user functions */
2920 static struct passwd *nwrap_files_getpwnam(struct nwrap_backend *b,
2921                                            const char *name)
2922 {
2923         int i;
2924         bool ok;
2925
2926         (void) b; /* unused */
2927
2928         NWRAP_LOG(NWRAP_LOG_DEBUG, "Lookup user %s in files", name);
2929
2930         ok = nwrap_files_cache_reload(nwrap_pw_global.cache);
2931         if (!ok) {
2932                 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading passwd file");
2933                 return NULL;
2934         }
2935
2936         for (i=0; i<nwrap_pw_global.num; i++) {
2937                 if (strcmp(nwrap_pw_global.list[i].pw_name, name) == 0) {
2938                         NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] found", name);
2939                         return &nwrap_pw_global.list[i];
2940                 }
2941                 NWRAP_LOG(NWRAP_LOG_DEBUG,
2942                           "user[%s] does not match [%s]",
2943                           name,
2944                           nwrap_pw_global.list[i].pw_name);
2945         }
2946
2947         NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] not found\n", name);
2948
2949         errno = ENOENT;
2950         return NULL;
2951 }
2952
2953 static int nwrap_files_getpwnam_r(struct nwrap_backend *b,
2954                                   const char *name, struct passwd *pwdst,
2955                                   char *buf, size_t buflen, struct passwd **pwdstp)
2956 {
2957         struct passwd *pw;
2958
2959         pw = nwrap_files_getpwnam(b, name);
2960         if (!pw) {
2961                 if (errno == 0) {
2962                         return ENOENT;
2963                 }
2964                 return errno;
2965         }
2966
2967         return nwrap_pw_copy_r(pw, pwdst, buf, buflen, pwdstp);
2968 }
2969
2970 static struct passwd *nwrap_files_getpwuid(struct nwrap_backend *b,
2971                                            uid_t uid)
2972 {
2973         int i;
2974         bool ok;
2975
2976         (void) b; /* unused */
2977
2978         ok = nwrap_files_cache_reload(nwrap_pw_global.cache);
2979         if (!ok) {
2980                 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading passwd file");
2981                 return NULL;
2982         }
2983
2984         for (i=0; i<nwrap_pw_global.num; i++) {
2985                 if (nwrap_pw_global.list[i].pw_uid == uid) {
2986                         NWRAP_LOG(NWRAP_LOG_DEBUG, "uid[%u] found", uid);
2987                         return &nwrap_pw_global.list[i];
2988                 }
2989                 NWRAP_LOG(NWRAP_LOG_DEBUG,
2990                           "uid[%u] does not match [%u]",
2991                           uid,
2992                           nwrap_pw_global.list[i].pw_uid);
2993         }
2994
2995         NWRAP_LOG(NWRAP_LOG_DEBUG, "uid[%u] not found\n", uid);
2996
2997         errno = ENOENT;
2998         return NULL;
2999 }
3000
3001 static int nwrap_files_getpwuid_r(struct nwrap_backend *b,
3002                                   uid_t uid, struct passwd *pwdst,
3003                                   char *buf, size_t buflen, struct passwd **pwdstp)
3004 {
3005         struct passwd *pw;
3006
3007         pw = nwrap_files_getpwuid(b, uid);
3008         if (!pw) {
3009                 if (errno == 0) {
3010                         return ENOENT;
3011                 }
3012                 return errno;
3013         }
3014
3015         return nwrap_pw_copy_r(pw, pwdst, buf, buflen, pwdstp);
3016 }
3017
3018 /* user enum functions */
3019 static void nwrap_files_setpwent(struct nwrap_backend *b)
3020 {
3021         (void) b; /* unused */
3022
3023         nwrap_pw_global.idx = 0;
3024 }
3025
3026 static struct passwd *nwrap_files_getpwent(struct nwrap_backend *b)
3027 {
3028         struct passwd *pw;
3029
3030         (void) b; /* unused */
3031
3032         if (nwrap_pw_global.idx == 0) {
3033                 bool ok;
3034                 ok = nwrap_files_cache_reload(nwrap_pw_global.cache);
3035                 if (!ok) {
3036                         NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading passwd file");
3037                         return NULL;
3038                 }
3039         }
3040
3041         if (nwrap_pw_global.idx >= nwrap_pw_global.num) {
3042                 errno = ENOENT;
3043                 return NULL;
3044         }
3045
3046         pw = &nwrap_pw_global.list[nwrap_pw_global.idx++];
3047
3048         NWRAP_LOG(NWRAP_LOG_DEBUG,
3049                   "return user[%s] uid[%u]",
3050                   pw->pw_name, pw->pw_uid);
3051
3052         return pw;
3053 }
3054
3055 static int nwrap_files_getpwent_r(struct nwrap_backend *b,
3056                                   struct passwd *pwdst, char *buf,
3057                                   size_t buflen, struct passwd **pwdstp)
3058 {
3059         struct passwd *pw;
3060
3061         pw = nwrap_files_getpwent(b);
3062         if (!pw) {
3063                 if (errno == 0) {
3064                         return ENOENT;
3065                 }
3066                 return errno;
3067         }
3068
3069         return nwrap_pw_copy_r(pw, pwdst, buf, buflen, pwdstp);
3070 }
3071
3072 static void nwrap_files_endpwent(struct nwrap_backend *b)
3073 {
3074         (void) b; /* unused */
3075
3076         nwrap_pw_global.idx = 0;
3077 }
3078
3079 /* shadow */
3080
3081 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
3082
3083 #ifdef HAVE_SETSPENT
3084 static void nwrap_files_setspent(void)
3085 {
3086         nwrap_sp_global.idx = 0;
3087 }
3088
3089 static struct spwd *nwrap_files_getspent(void)
3090 {
3091         struct spwd *sp;
3092
3093         if (nwrap_sp_global.idx == 0) {
3094                 bool ok;
3095
3096                 ok = nwrap_files_cache_reload(nwrap_sp_global.cache);
3097                 if (!ok) {
3098                         NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading shadow file");
3099                         return NULL;
3100                 }
3101         }
3102
3103         if (nwrap_sp_global.idx >= nwrap_sp_global.num) {
3104                 errno = ENOENT;
3105                 return NULL;
3106         }
3107
3108         sp = &nwrap_sp_global.list[nwrap_sp_global.idx++];
3109
3110         NWRAP_LOG(NWRAP_LOG_DEBUG,
3111                   "return user[%s]",
3112                   sp->sp_namp);
3113
3114         return sp;
3115 }
3116
3117 static void nwrap_files_endspent(void)
3118 {
3119         nwrap_sp_global.idx = 0;
3120 }
3121 #endif /* HAVE_SETSPENT */
3122
3123 static struct spwd *nwrap_files_getspnam(const char *name)
3124 {
3125         int i;
3126         bool ok;
3127
3128         NWRAP_LOG(NWRAP_LOG_DEBUG, "Lookup user %s in files", name);
3129
3130         ok = nwrap_files_cache_reload(nwrap_sp_global.cache);
3131         if (!ok) {
3132                 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading shadow file");
3133                 return NULL;
3134         }
3135
3136         for (i=0; i<nwrap_sp_global.num; i++) {
3137                 if (strcmp(nwrap_sp_global.list[i].sp_namp, name) == 0) {
3138                         NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] found", name);
3139                         return &nwrap_sp_global.list[i];
3140                 }
3141                 NWRAP_LOG(NWRAP_LOG_DEBUG,
3142                           "user[%s] does not match [%s]",
3143                           name,
3144                           nwrap_sp_global.list[i].sp_namp);
3145         }
3146
3147         NWRAP_LOG(NWRAP_LOG_DEBUG, "user[%s] not found\n", name);
3148
3149         errno = ENOENT;
3150         return NULL;
3151 }
3152 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
3153
3154 /* misc functions */
3155 static int nwrap_files_initgroups(struct nwrap_backend *b,
3156                                   const char *user,
3157                                   gid_t group)
3158 {
3159         struct group *grp;
3160         gid_t *groups;
3161         int size = 1;
3162         int rc;
3163
3164         groups = (gid_t *)malloc(size * sizeof(gid_t));
3165         if (groups == NULL) {
3166                 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
3167                 errno = ENOMEM;
3168                 return -1;
3169         }
3170         groups[0] = group;
3171
3172         nwrap_files_setgrent(b);
3173         while ((grp = nwrap_files_getgrent(b)) != NULL) {
3174                 int i = 0;
3175
3176                 NWRAP_LOG(NWRAP_LOG_DEBUG,
3177                           "Inspecting %s for group membership",
3178                           grp->gr_name);
3179
3180                 for (i=0; grp->gr_mem && grp->gr_mem[i] != NULL; i++) {
3181                         if (group != grp->gr_gid &&
3182                             (strcmp(user, grp->gr_mem[i]) == 0)) {
3183                                 NWRAP_LOG(NWRAP_LOG_DEBUG,
3184                                           "%s is member of %s",
3185                                           user,
3186                                           grp->gr_name);
3187
3188                                 groups = (gid_t *)realloc(groups,
3189                                                           (size + 1) * sizeof(gid_t));
3190                                 if (groups == NULL) {
3191                                         NWRAP_LOG(NWRAP_LOG_ERROR,
3192                                                   "Out of memory");
3193                                         errno = ENOMEM;
3194                                         return -1;
3195                                 }
3196
3197                                 groups[size] = grp->gr_gid;
3198                                 size++;
3199                         }
3200                 }
3201         }
3202
3203         nwrap_files_endgrent(b);
3204
3205         NWRAP_LOG(NWRAP_LOG_DEBUG,
3206                   "%s is member of %d groups",
3207                   user, size);
3208
3209         /* This really only works if uid_wrapper is loaded */
3210         rc = setgroups(size, groups);
3211
3212         free(groups);
3213
3214         return rc;
3215 }
3216
3217 /* group functions */
3218 static struct group *nwrap_files_getgrnam(struct nwrap_backend *b,
3219                                           const char *name)
3220 {
3221         int i;
3222         bool ok;
3223
3224         (void) b; /* unused */
3225
3226         ok = nwrap_files_cache_reload(nwrap_gr_global.cache);
3227         if (!ok) {
3228                 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading group file");
3229                 return NULL;
3230         }
3231
3232         for (i=0; i<nwrap_gr_global.num; i++) {
3233                 if (strcmp(nwrap_gr_global.list[i].gr_name, name) == 0) {
3234                         NWRAP_LOG(NWRAP_LOG_DEBUG, "group[%s] found", name);
3235                         return &nwrap_gr_global.list[i];
3236                 }
3237                 NWRAP_LOG(NWRAP_LOG_DEBUG,
3238                           "group[%s] does not match [%s]",
3239                           name,
3240                           nwrap_gr_global.list[i].gr_name);
3241         }
3242
3243         NWRAP_LOG(NWRAP_LOG_DEBUG, "group[%s] not found", name);
3244
3245         errno = ENOENT;
3246         return NULL;
3247 }
3248
3249 static int nwrap_files_getgrnam_r(struct nwrap_backend *b,
3250                                   const char *name, struct group *grdst,
3251                                   char *buf, size_t buflen, struct group **grdstp)
3252 {
3253         struct group *gr;
3254
3255         gr = nwrap_files_getgrnam(b, name);
3256         if (!gr) {
3257                 if (errno == 0) {
3258                         return ENOENT;
3259                 }
3260                 return errno;
3261         }
3262
3263         return nwrap_gr_copy_r(gr, grdst, buf, buflen, grdstp);
3264 }
3265
3266 static struct group *nwrap_files_getgrgid(struct nwrap_backend *b,
3267                                           gid_t gid)
3268 {
3269         int i;
3270         bool ok;
3271
3272         (void) b; /* unused */
3273
3274         ok = nwrap_files_cache_reload(nwrap_gr_global.cache);
3275         if (!ok) {
3276                 NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading group file");
3277                 return NULL;
3278         }
3279
3280         for (i=0; i<nwrap_gr_global.num; i++) {
3281                 if (nwrap_gr_global.list[i].gr_gid == gid) {
3282                         NWRAP_LOG(NWRAP_LOG_DEBUG, "gid[%u] found", gid);
3283                         return &nwrap_gr_global.list[i];
3284                 }
3285                 NWRAP_LOG(NWRAP_LOG_DEBUG,
3286                           "gid[%u] does not match [%u]",
3287                           gid,
3288                           nwrap_gr_global.list[i].gr_gid);
3289         }
3290
3291         NWRAP_LOG(NWRAP_LOG_DEBUG, "gid[%u] not found", gid);
3292
3293         errno = ENOENT;
3294         return NULL;
3295 }
3296
3297 static int nwrap_files_getgrgid_r(struct nwrap_backend *b,
3298                                   gid_t gid, struct group *grdst,
3299                                   char *buf, size_t buflen, struct group **grdstp)
3300 {
3301         struct group *gr;
3302
3303         gr = nwrap_files_getgrgid(b, gid);
3304         if (!gr) {
3305                 if (errno == 0) {
3306                         return ENOENT;
3307                 }
3308                 return errno;
3309         }
3310
3311         return nwrap_gr_copy_r(gr, grdst, buf, buflen, grdstp);
3312 }
3313
3314 /* group enum functions */
3315 static void nwrap_files_setgrent(struct nwrap_backend *b)
3316 {
3317         (void) b; /* unused */
3318
3319         nwrap_gr_global.idx = 0;
3320 }
3321
3322 static struct group *nwrap_files_getgrent(struct nwrap_backend *b)
3323 {
3324         struct group *gr;
3325
3326         (void) b; /* unused */
3327
3328         if (nwrap_gr_global.idx == 0) {
3329                 bool ok;
3330
3331                 ok = nwrap_files_cache_reload(nwrap_gr_global.cache);
3332                 if (!ok) {
3333                         NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading group file");
3334                         return NULL;
3335                 }
3336         }
3337
3338         if (nwrap_gr_global.idx >= nwrap_gr_global.num) {
3339                 errno = ENOENT;
3340                 return NULL;
3341         }
3342
3343         gr = &nwrap_gr_global.list[nwrap_gr_global.idx++];
3344
3345         NWRAP_LOG(NWRAP_LOG_DEBUG,
3346                   "return group[%s] gid[%u]",
3347                   gr->gr_name, gr->gr_gid);
3348
3349         return gr;
3350 }
3351
3352 static int nwrap_files_getgrent_r(struct nwrap_backend *b,
3353                                   struct group *grdst, char *buf,
3354                                   size_t buflen, struct group **grdstp)
3355 {
3356         struct group *gr;
3357
3358         gr = nwrap_files_getgrent(b);
3359         if (!gr) {
3360                 if (errno == 0) {
3361                         return ENOENT;
3362                 }
3363                 return errno;
3364         }
3365
3366         return nwrap_gr_copy_r(gr, grdst, buf, buflen, grdstp);
3367 }
3368
3369 static void nwrap_files_endgrent(struct nwrap_backend *b)
3370 {
3371         (void) b; /* unused */
3372
3373         nwrap_gr_global.idx = 0;
3374 }
3375
3376 /* hosts functions */
3377 static int nwrap_files_gethostbyname(const char *name, int af,
3378                                      struct hostent *result,
3379                                      struct nwrap_vector *addr_list)
3380 {
3381         struct nwrap_entlist *el;
3382         struct hostent *he;
3383         char *h_name_lower;
3384         ENTRY e;
3385         ENTRY *e_p;
3386         char canon_name[DNS_NAME_MAX] = { 0 };
3387         size_t name_len;
3388         bool he_found = false;
3389         bool ok;
3390
3391         ok = nwrap_files_cache_reload(nwrap_he_global.cache);
3392         if (!ok) {
3393                 NWRAP_LOG(NWRAP_LOG_ERROR, "error loading hosts file");
3394                 goto no_ent;
3395         }
3396
3397         name_len = strlen(name);
3398         if (name_len < sizeof(canon_name) && name[name_len - 1] == '.') {
3399                 strncpy(canon_name, name, name_len - 1);
3400                 name = canon_name;
3401         }
3402
3403         if (!str_tolower_copy(&h_name_lower, name)) {
3404                 NWRAP_LOG(NWRAP_LOG_DEBUG,
3405                           "Out of memory while converting to lower case");
3406                 goto no_ent;
3407         }
3408
3409         /* Look at hash table for element */
3410         NWRAP_LOG(NWRAP_LOG_DEBUG, "Searching for name: %s", h_name_lower);
3411         e.key = h_name_lower;
3412         e.data = NULL;
3413         e_p = hsearch(e, FIND);
3414         if (e_p == NULL) {
3415                 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s not found.", h_name_lower);
3416                 SAFE_FREE(h_name_lower);
3417                 goto no_ent;
3418         }
3419         SAFE_FREE(h_name_lower);
3420
3421         /* Always cleanup vector and results */
3422         if (!nwrap_vector_is_initialized(addr_list)) {
3423                 if (!nwrap_vector_init(addr_list)) {
3424                         NWRAP_LOG(NWRAP_LOG_DEBUG,
3425                                   "Unable to initialize memory for addr_list vector");
3426                         goto no_ent;
3427                 }
3428         } else {
3429                 /* When vector is initialized data are valid no more.
3430                  * Quick way how to free vector is: */
3431                 addr_list->count = 0;
3432         }
3433
3434         /* Iterate through results */
3435         for (el = (struct nwrap_entlist *)e_p->data; el != NULL; el = el->next)
3436         {
3437                 he = &(el->ed->ht);
3438
3439                 /* Filter by address familiy if provided */
3440                 if (af != AF_UNSPEC && he->h_addrtype != af) {
3441                         continue;
3442                 }
3443
3444                 /*
3445                  * GLIBC HACK?
3446                  * glibc doesn't return ipv6 addresses when AF_UNSPEC is used
3447                  */
3448                 if (af == AF_UNSPEC && he->h_addrtype != AF_INET) {
3449                         continue;
3450                 }
3451
3452                 if (!he_found) {
3453                         memcpy(result, he, sizeof(struct hostent));
3454                         NWRAP_LOG(NWRAP_LOG_DEBUG,
3455                                   "Name found. Returning record for %s",
3456                                   he->h_name);
3457                         he_found = true;
3458                 }
3459                 nwrap_vector_merge(addr_list, &el->ed->nwrap_addrdata);
3460                 result->h_addr_list = nwrap_vector_head(addr_list);
3461         }
3462
3463         if (he_found) {
3464                 return 0;
3465         }
3466         NWRAP_LOG(NWRAP_LOG_DEBUG,
3467                   "Name found in database. No records matches type.");
3468
3469 no_ent:
3470         errno = ENOENT;
3471         return -1;
3472 }
3473
3474 #ifdef HAVE_GETHOSTBYNAME_R
3475 static int nwrap_gethostbyname_r(const char *name,
3476                                  struct hostent *ret,
3477                                  char *buf, size_t buflen,
3478                                  struct hostent **result, int *h_errnop)
3479 {
3480         struct nwrap_vector *addr_list = malloc(sizeof(struct nwrap_vector));
3481         int rc;
3482
3483         if (addr_list == NULL) {
3484                 NWRAP_LOG(NWRAP_LOG_ERROR,
3485                           "Unable to allocate memory for address list");
3486                 errno = ENOENT;
3487                 return -1;
3488         }
3489
3490         ZERO_STRUCTP(addr_list);
3491
3492         rc = nwrap_files_gethostbyname(name, AF_UNSPEC, ret, addr_list);
3493         if (rc == -1) {
3494                 *h_errnop = h_errno;
3495                 if (addr_list->items != NULL) {
3496                         free(addr_list->items);
3497                 }
3498                 SAFE_FREE(addr_list);
3499                 errno = ENOENT;
3500                 return -1;
3501         }
3502
3503         if (buflen < (addr_list->count * sizeof(void *))) {
3504                 SAFE_FREE(addr_list->items);
3505                 SAFE_FREE(addr_list);
3506                 return ERANGE;
3507         }
3508
3509         /* Copy all to user provided buffer and change
3510          * pointers in returned structure.
3511          * +1 is for ending NULL pointer. */
3512         memcpy(buf, addr_list->items, (addr_list->count + 1) * sizeof(void *));
3513
3514         free(addr_list->items);
3515         free(addr_list);
3516
3517         ret->h_addr_list = (char **)buf;
3518         *result = ret;
3519         return 0;
3520 }
3521
3522 int gethostbyname_r(const char *name,
3523                     struct hostent *ret,
3524                     char *buf, size_t buflen,
3525                     struct hostent **result, int *h_errnop)
3526 {
3527         if (!nss_wrapper_hosts_enabled()) {
3528                 return libc_gethostbyname_r(name,
3529                                             ret,
3530                                             buf,
3531                                             buflen,
3532                                             result,
3533                                             h_errnop);
3534         }
3535
3536         return nwrap_gethostbyname_r(name, ret, buf, buflen, result, h_errnop);
3537 }
3538 #endif
3539
3540 static int nwrap_files_getaddrinfo(const char *name,
3541                                    unsigned short port,
3542                                    const struct addrinfo *hints,
3543                                    struct addrinfo **ai)
3544 {
3545         struct nwrap_entlist *el;
3546         struct hostent *he;
3547         struct addrinfo *ai_head = NULL;
3548         struct addrinfo *ai_cur = NULL;
3549         char *h_name_lower;
3550         size_t name_len;
3551         char canon_name[DNS_NAME_MAX] = { 0 };
3552         bool skip_canonname = false;
3553         ENTRY e = {
3554                 .key = NULL,
3555         };
3556         ENTRY *e_p = NULL;
3557         int rc;
3558         bool ok;
3559
3560         ok = nwrap_files_cache_reload(nwrap_he_global.cache);
3561         if (!ok) {
3562                 NWRAP_LOG(NWRAP_LOG_ERROR, "error loading hosts file");
3563                 return EAI_SYSTEM;
3564         }
3565
3566         name_len = strlen(name);
3567         if (name_len < DNS_NAME_MAX && name[name_len - 1] == '.') {
3568                 strncpy(canon_name, name, name_len - 1);
3569                 name = canon_name;
3570         }
3571
3572         if (!str_tolower_copy(&h_name_lower, name)) {
3573                 NWRAP_LOG(NWRAP_LOG_DEBUG,
3574                           "Out of memory while converting to lower case");
3575                 return EAI_MEMORY;
3576         }
3577
3578         NWRAP_LOG(NWRAP_LOG_DEBUG, "Searching for name: %s", h_name_lower);
3579         e.key = h_name_lower;
3580         e.data = NULL;
3581         e_p = hsearch(e, FIND);
3582         if (e_p == NULL) {
3583                 NWRAP_LOG(NWRAP_LOG_DEBUG, "Name %s not found.", h_name_lower);
3584                 SAFE_FREE(h_name_lower);
3585                 errno = ENOENT;
3586                 return EAI_NONAME;
3587         }
3588         NWRAP_LOG(NWRAP_LOG_DEBUG, "Name: %s found.", h_name_lower);
3589         SAFE_FREE(h_name_lower);
3590
3591         rc = EAI_NONAME;
3592         for (el = (struct nwrap_entlist *)e_p->data; el != NULL; el = el->next)
3593         {
3594                 int rc2;
3595                 struct addrinfo *ai_new = NULL;
3596
3597                 he = &(el->ed->ht);
3598
3599                 if (hints->ai_family != AF_UNSPEC &&
3600                     he->h_addrtype != hints->ai_family)
3601                 {
3602                         NWRAP_LOG(NWRAP_LOG_DEBUG,
3603                                   "Entry found but with wrong AF - "
3604                                   "remembering EAI_ADDRINFO.");
3605                         rc = EAI_ADDRFAMILY;
3606                         continue;
3607                 }
3608
3609                 /* Function allocates memory and returns it in ai. */
3610                 rc2 = nwrap_convert_he_ai(he,
3611                                          port,
3612                                          hints,
3613                                          &ai_new,
3614                                          skip_canonname);
3615                 if (rc2 != 0) {
3616                         NWRAP_LOG(NWRAP_LOG_ERROR, "Error converting he to ai");
3617                         if (ai_head != NULL) {
3618                                 freeaddrinfo(ai_head);
3619                         }
3620                         return rc2;
3621                 }
3622                 skip_canonname = true;
3623
3624                 if (ai_head == NULL) {
3625                         ai_head = ai_new;
3626                 }
3627                 if (ai_cur != NULL) {
3628                         ai_cur->ai_next = ai_new;
3629                 }
3630                 ai_cur = ai_new;
3631         }
3632
3633         if (ai_head != NULL) {
3634                 rc = 0;
3635         }
3636
3637         *ai = ai_head;
3638
3639         return rc;
3640 }
3641
3642 static struct hostent *nwrap_files_gethostbyaddr(const void *addr,
3643                                                  socklen_t len, int type)
3644 {
3645         struct hostent *he;
3646         char ip[NWRAP_INET_ADDRSTRLEN] = {0};
3647         struct nwrap_entdata *ed;
3648         const char *a;
3649         size_t i;
3650         bool ok;
3651
3652         (void) len; /* unused */
3653
3654         ok = nwrap_files_cache_reload(nwrap_he_global.cache);
3655         if (!ok) {
3656                 NWRAP_LOG(NWRAP_LOG_ERROR, "error loading hosts file");
3657                 return NULL;
3658         }
3659
3660         a = inet_ntop(type, addr, ip, sizeof(ip));
3661         if (a == NULL) {
3662                 errno = EINVAL;
3663                 return NULL;
3664         }
3665
3666         nwrap_vector_foreach(ed, nwrap_he_global.entries, i)
3667         {
3668                 he = &(ed->ht);
3669                 if (he->h_addrtype != type) {
3670                         continue;
3671                 }
3672
3673                 if (memcmp(addr, he->h_addr_list[0], he->h_length) == 0) {
3674                         return he;
3675                 }
3676         }
3677
3678         errno = ENOENT;
3679         return NULL;
3680 }
3681
3682 #ifdef HAVE_GETHOSTBYADDR_R
3683 static int nwrap_gethostbyaddr_r(const void *addr, socklen_t len, int type,
3684                                  struct hostent *ret,
3685                                  char *buf, size_t buflen,
3686                                  struct hostent **result, int *h_errnop)
3687 {
3688         *result = nwrap_files_gethostbyaddr(addr, len, type);
3689         if (*result != NULL) {
3690                 memset(buf, '\0', buflen);
3691                 *ret = **result;
3692                 return 0;
3693         } else {
3694                 *h_errnop = h_errno;
3695                 return -1;
3696         }
3697 }
3698
3699 int gethostbyaddr_r(const void *addr, socklen_t len, int type,
3700                     struct hostent *ret,
3701                     char *buf, size_t buflen,
3702                     struct hostent **result, int *h_errnop)
3703 {
3704         if (!nss_wrapper_hosts_enabled()) {
3705                 return libc_gethostbyaddr_r(addr,
3706                                             len,
3707                                             type,
3708                                             ret,
3709                                             buf,
3710                                             buflen,
3711                                             result,
3712                                             h_errnop);
3713         }
3714
3715         return nwrap_gethostbyaddr_r(addr, len, type, ret, buf, buflen, result, h_errnop);
3716 }
3717 #endif
3718
3719 /* hosts enum functions */
3720 static void nwrap_files_sethostent(void)
3721 {
3722         nwrap_he_global.idx = 0;
3723 }
3724
3725 static struct hostent *nwrap_files_gethostent(void)
3726 {
3727         struct hostent *he;
3728
3729         if (nwrap_he_global.idx == 0) {
3730                 bool ok;
3731
3732                 ok = nwrap_files_cache_reload(nwrap_he_global.cache);
3733                 if (!ok) {
3734                         NWRAP_LOG(NWRAP_LOG_ERROR, "Error loading hosts file");
3735                         return NULL;
3736                 }
3737         }
3738
3739         if (nwrap_he_global.idx >= nwrap_he_global.num) {
3740                 errno = ENOENT;
3741                 return NULL;
3742         }
3743
3744         he = &((struct nwrap_entdata *)nwrap_he_global.entries.items[nwrap_he_global.idx++])->ht;
3745
3746         NWRAP_LOG(NWRAP_LOG_DEBUG, "return hosts[%s]", he->h_name);
3747
3748         return he;
3749 }
3750
3751 static void nwrap_files_endhostent(void)
3752 {
3753         nwrap_he_global.idx = 0;
3754 }
3755
3756 /*
3757  * module backend
3758  */
3759
3760
3761 static struct passwd *nwrap_module_getpwnam(struct nwrap_backend *b,
3762                                             const char *name)
3763 {
3764         static struct passwd pwd;
3765         static char buf[1000];
3766         NSS_STATUS status;
3767
3768         if (!b->fns->_nss_getpwnam_r) {
3769                 return NULL;
3770         }
3771
3772         status = b->fns->_nss_getpwnam_r(name, &pwd, buf, sizeof(buf), &errno);
3773         if (status == NSS_STATUS_NOTFOUND) {
3774                 return NULL;
3775         }
3776         if (status != NSS_STATUS_SUCCESS) {
3777                 return NULL;
3778         }
3779
3780         return &pwd;
3781 }
3782
3783 static int nwrap_module_getpwnam_r(struct nwrap_backend *b,
3784                                    const char *name, struct passwd *pwdst,
3785                                    char *buf, size_t buflen, struct passwd **pwdstp)
3786 {
3787         int ret;
3788
3789         (void) b; /* unused */
3790         (void) pwdst; /* unused */
3791         (void) pwdstp; /* unused */
3792
3793         if (!b->fns->_nss_getpwnam_r) {
3794                 return NSS_STATUS_NOTFOUND;
3795         }
3796
3797         ret = b->fns->_nss_getpwnam_r(name, pwdst, buf, buflen, &errno);
3798         switch (ret) {
3799         case NSS_STATUS_SUCCESS:
3800                 return 0;
3801         case NSS_STATUS_NOTFOUND:
3802                 if (errno != 0) {
3803                         return errno;
3804                 }
3805                 return ENOENT;
3806         case NSS_STATUS_TRYAGAIN:
3807                 if (errno != 0) {
3808                         return errno;
3809                 }
3810                 return ERANGE;
3811         default:
3812                 if (errno != 0) {
3813                         return errno;
3814                 }
3815                 return ret;
3816         }
3817 }
3818
3819 static struct passwd *nwrap_module_getpwuid(struct nwrap_backend *b,
3820                                             uid_t uid)
3821 {
3822         static struct passwd pwd;
3823         static char buf[1000];
3824         NSS_STATUS status;
3825
3826         if (!b->fns->_nss_getpwuid_r) {
3827                 return NULL;
3828         }
3829
3830         status = b->fns->_nss_getpwuid_r(uid, &pwd, buf, sizeof(buf), &errno);
3831         if (status == NSS_STATUS_NOTFOUND) {
3832                 return NULL;
3833         }
3834         if (status != NSS_STATUS_SUCCESS) {
3835                 return NULL;
3836         }
3837         return &pwd;
3838 }
3839
3840 static int nwrap_module_getpwuid_r(struct nwrap_backend *b,
3841                                    uid_t uid, struct passwd *pwdst,
3842                                    char *buf, size_t buflen, struct passwd **pwdstp)
3843 {
3844         int ret;
3845
3846         (void) pwdstp; /* unused */
3847
3848         if (!b->fns->_nss_getpwuid_r) {
3849                 return ENOENT;
3850         }
3851
3852         ret = b->fns->_nss_getpwuid_r(uid, pwdst, buf, buflen, &errno);
3853         switch (ret) {
3854         case NSS_STATUS_SUCCESS:
3855                 return 0;
3856         case NSS_STATUS_NOTFOUND:
3857                 if (errno != 0) {
3858                         return errno;
3859                 }
3860                 return ENOENT;
3861         case NSS_STATUS_TRYAGAIN:
3862                 if (errno != 0) {
3863                         return errno;
3864                 }
3865                 return ERANGE;
3866         default:
3867                 if (errno != 0) {
3868                         return errno;
3869                 }
3870                 return ret;
3871         }
3872 }
3873
3874 static void nwrap_module_setpwent(struct nwrap_backend *b)
3875 {
3876         if (!b->fns->_nss_setpwent) {
3877                 return;
3878         }
3879
3880         b->fns->_nss_setpwent();
3881 }
3882
3883 static struct passwd *nwrap_module_getpwent(struct nwrap_backend *b)
3884 {
3885         static struct passwd pwd;
3886         static char buf[1000];
3887         NSS_STATUS status;
3888
3889         if (!b->fns->_nss_getpwent_r) {
3890                 return NULL;
3891         }
3892
3893         status = b->fns->_nss_getpwent_r(&pwd, buf, sizeof(buf), &errno);
3894         if (status == NSS_STATUS_NOTFOUND) {
3895                 return NULL;
3896         }
3897         if (status != NSS_STATUS_SUCCESS) {
3898                 return NULL;
3899         }
3900         return &pwd;
3901 }
3902
3903 static int nwrap_module_getpwent_r(struct nwrap_backend *b,
3904                                    struct passwd *pwdst, char *buf,
3905                                    size_t buflen, struct passwd **pwdstp)
3906 {
3907         int ret;
3908
3909         (void) pwdstp; /* unused */
3910
3911         if (!b->fns->_nss_getpwent_r) {
3912                 return ENOENT;
3913         }
3914
3915         ret = b->fns->_nss_getpwent_r(pwdst, buf, buflen, &errno);
3916         switch (ret) {
3917         case NSS_STATUS_SUCCESS:
3918                 return 0;
3919         case NSS_STATUS_NOTFOUND:
3920                 if (errno != 0) {
3921                         return errno;
3922                 }
3923                 return ENOENT;
3924         case NSS_STATUS_TRYAGAIN:
3925                 if (errno != 0) {
3926                         return errno;
3927                 }
3928                 return ERANGE;
3929         default:
3930                 if (errno != 0) {
3931                         return errno;
3932                 }
3933                 return ret;
3934         }
3935 }
3936
3937 static void nwrap_module_endpwent(struct nwrap_backend *b)
3938 {
3939         if (!b->fns->_nss_endpwent) {
3940                 return;
3941         }
3942
3943         b->fns->_nss_endpwent();
3944 }
3945
3946 static int nwrap_module_initgroups(struct nwrap_backend *b,
3947                                    const char *user, gid_t group)
3948 {
3949         gid_t *groups;
3950         long int start;
3951         long int size;
3952
3953         if (!b->fns->_nss_initgroups) {
3954                 return NSS_STATUS_UNAVAIL;
3955         }
3956
3957         return b->fns->_nss_initgroups(user, group, &start, &size, &groups, 0, &errno);
3958 }
3959
3960 static struct group *nwrap_module_getgrnam(struct nwrap_backend *b,
3961                                            const char *name)
3962 {
3963         static struct group grp;
3964         static char *buf;
3965         static int buflen = 1000;
3966         NSS_STATUS status;
3967
3968         if (!b->fns->_nss_getgrnam_r) {
3969                 return NULL;
3970         }
3971
3972         if (!buf) {
3973                 buf = (char *)malloc(buflen);
3974         }
3975 again:
3976         status = b->fns->_nss_getgrnam_r(name, &grp, buf, buflen, &errno);
3977         if (status == NSS_STATUS_TRYAGAIN) {
3978                 buflen *= 2;
3979                 buf = (char *)realloc(buf, buflen);
3980                 if (!buf) {
3981                         return NULL;
3982                 }
3983                 goto again;
3984         }
3985         if (status == NSS_STATUS_NOTFOUND) {
3986                 SAFE_FREE(buf);
3987                 return NULL;
3988         }
3989         if (status != NSS_STATUS_SUCCESS) {
3990                 SAFE_FREE(buf);
3991                 return NULL;
3992         }
3993         return &grp;
3994 }
3995
3996 static int nwrap_module_getgrnam_r(struct nwrap_backend *b,
3997                                    const char *name, struct group *grdst,
3998                                    char *buf, size_t buflen, struct group **grdstp)
3999 {
4000         int ret;
4001
4002         (void) grdstp; /* unused */
4003
4004         if (!b->fns->_nss_getgrnam_r) {
4005                 return ENOENT;
4006         }
4007
4008         ret = b->fns->_nss_getgrnam_r(name, grdst, buf, buflen, &errno);
4009         switch (ret) {
4010         case NSS_STATUS_SUCCESS:
4011                 return 0;
4012         case NSS_STATUS_NOTFOUND:
4013                 if (errno != 0) {
4014                         return errno;
4015                 }
4016                 return ENOENT;
4017         case NSS_STATUS_TRYAGAIN:
4018                 if (errno != 0) {
4019                         return errno;
4020                 }
4021                 return ERANGE;
4022         default:
4023                 if (errno != 0) {
4024                         return errno;
4025                 }
4026                 return ret;
4027         }
4028 }
4029
4030 static struct group *nwrap_module_getgrgid(struct nwrap_backend *b,
4031                                            gid_t gid)
4032 {
4033         static struct group grp;
4034         static char *buf;
4035         static int buflen = 1000;
4036         NSS_STATUS status;
4037
4038         if (!b->fns->_nss_getgrgid_r) {
4039                 return NULL;
4040         }
4041
4042         if (!buf) {
4043                 buf = (char *)malloc(buflen);
4044         }
4045
4046 again:
4047         status = b->fns->_nss_getgrgid_r(gid, &grp, buf, buflen, &errno);
4048         if (status == NSS_STATUS_TRYAGAIN) {
4049                 buflen *= 2;
4050                 buf = (char *)realloc(buf, buflen);
4051                 if (!buf) {
4052                         return NULL;
4053                 }
4054                 goto again;
4055         }
4056         if (status == NSS_STATUS_NOTFOUND) {
4057                 SAFE_FREE(buf);
4058                 return NULL;
4059         }
4060         if (status != NSS_STATUS_SUCCESS) {
4061                 SAFE_FREE(buf);
4062                 return NULL;
4063         }
4064         return &grp;
4065 }
4066
4067 static int nwrap_module_getgrgid_r(struct nwrap_backend *b,
4068                                    gid_t gid, struct group *grdst,
4069                                    char *buf, size_t buflen, struct group **grdstp)
4070 {
4071         int ret;
4072
4073         (void) grdstp; /* unused */
4074
4075         if (!b->fns->_nss_getgrgid_r) {
4076                 return ENOENT;
4077         }
4078
4079         ret = b->fns->_nss_getgrgid_r(gid, grdst, buf, buflen, &errno);
4080         switch (ret) {
4081         case NSS_STATUS_SUCCESS:
4082                 return 0;
4083         case NSS_STATUS_NOTFOUND:
4084                 if (errno != 0) {
4085                         return errno;
4086                 }
4087                 return ENOENT;
4088         case NSS_STATUS_TRYAGAIN:
4089                 if (errno != 0) {
4090                         return errno;
4091                 }
4092                 return ERANGE;
4093         default:
4094                 if (errno != 0) {
4095                         return errno;
4096                 }
4097                 return ret;
4098         }
4099 }
4100
4101 static void nwrap_module_setgrent(struct nwrap_backend *b)
4102 {
4103         if (!b->fns->_nss_setgrent) {
4104                 return;
4105         }
4106
4107         b->fns->_nss_setgrent();
4108 }
4109
4110 static struct group *nwrap_module_getgrent(struct nwrap_backend *b)
4111 {
4112         static struct group grp;
4113         static char *buf;
4114         static int buflen = 1024;
4115         NSS_STATUS status;
4116
4117         if (!b->fns->_nss_getgrent_r) {
4118                 return NULL;
4119         }
4120
4121         if (!buf) {
4122                 buf = (char *)malloc(buflen);
4123         }
4124
4125 again:
4126         status = b->fns->_nss_getgrent_r(&grp, buf, buflen, &errno);
4127         if (status == NSS_STATUS_TRYAGAIN) {
4128                 buflen *= 2;
4129                 buf = (char *)realloc(buf, buflen);
4130                 if (!buf) {
4131                         return NULL;
4132                 }
4133                 goto again;
4134         }
4135         if (status == NSS_STATUS_NOTFOUND) {
4136                 SAFE_FREE(buf);
4137                 return NULL;
4138         }
4139         if (status != NSS_STATUS_SUCCESS) {
4140                 SAFE_FREE(buf);
4141                 return NULL;
4142         }
4143         return &grp;
4144 }
4145
4146 static int nwrap_module_getgrent_r(struct nwrap_backend *b,
4147                                    struct group *grdst, char *buf,
4148                                    size_t buflen, struct group **grdstp)
4149 {
4150         int ret;
4151
4152         (void) grdstp; /* unused */
4153
4154         if (!b->fns->_nss_getgrent_r) {
4155                 return ENOENT;
4156         }
4157
4158         ret = b->fns->_nss_getgrent_r(grdst, buf, buflen, &errno);
4159         switch (ret) {
4160         case NSS_STATUS_SUCCESS:
4161                 return 0;
4162         case NSS_STATUS_NOTFOUND:
4163                 if (errno != 0) {
4164                         return errno;
4165                 }
4166                 return ENOENT;
4167         case NSS_STATUS_TRYAGAIN:
4168                 if (errno != 0) {
4169                         return errno;
4170                 }
4171                 return ERANGE;
4172         default:
4173                 if (errno != 0) {
4174                         return errno;
4175                 }
4176                 return ret;
4177         }
4178 }
4179
4180 static void nwrap_module_endgrent(struct nwrap_backend *b)
4181 {
4182         if (!b->fns->_nss_endgrent) {
4183                 return;
4184         }
4185
4186         b->fns->_nss_endgrent();
4187 }
4188
4189 /****************************************************************************
4190  *   GETPWNAM
4191  ***************************************************************************/
4192
4193 static struct passwd *nwrap_getpwnam(const char *name)
4194 {
4195         int i;
4196         struct passwd *pwd;
4197
4198         for (i=0; i < nwrap_main_global->num_backends; i++) {
4199                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4200                 pwd = b->ops->nw_getpwnam(b, name);
4201                 if (pwd) {
4202                         return pwd;
4203                 }
4204         }
4205
4206         return NULL;
4207 }
4208
4209 struct passwd *getpwnam(const char *name)
4210 {
4211         if (!nss_wrapper_enabled()) {
4212                 return libc_getpwnam(name);
4213         }
4214
4215         return nwrap_getpwnam(name);
4216 }
4217
4218 /****************************************************************************
4219  *   GETPWNAM_R
4220  ***************************************************************************/
4221
4222 static int nwrap_getpwnam_r(const char *name, struct passwd *pwdst,
4223                             char *buf, size_t buflen, struct passwd **pwdstp)
4224 {
4225         int i,ret;
4226
4227         for (i=0; i < nwrap_main_global->num_backends; i++) {
4228                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4229                 ret = b->ops->nw_getpwnam_r(b, name, pwdst, buf, buflen, pwdstp);
4230                 if (ret == ENOENT) {
4231                         continue;
4232                 }
4233                 return ret;
4234         }
4235
4236         return ENOENT;
4237 }
4238
4239 #ifdef HAVE_GETPWNAM_R
4240 # ifdef HAVE_SOLARIS_GETPWNAM_R
4241 int getpwnam_r(const char *name, struct passwd *pwdst,
4242                char *buf, int buflen, struct passwd **pwdstp)
4243 # else /* HAVE_SOLARIS_GETPWNAM_R */
4244 int getpwnam_r(const char *name, struct passwd *pwdst,
4245                char *buf, size_t buflen, struct passwd **pwdstp)
4246 # endif /* HAVE_SOLARIS_GETPWNAM_R */
4247 {
4248         if (!nss_wrapper_enabled()) {
4249                 return libc_getpwnam_r(name, pwdst, buf, buflen, pwdstp);
4250         }
4251
4252         return nwrap_getpwnam_r(name, pwdst, buf, buflen, pwdstp);
4253 }
4254 #endif
4255
4256 /****************************************************************************
4257  *   GETPWUID
4258  ***************************************************************************/
4259
4260 static struct passwd *nwrap_getpwuid(uid_t uid)
4261 {
4262         int i;
4263         struct passwd *pwd;
4264
4265         for (i=0; i < nwrap_main_global->num_backends; i++) {
4266                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4267                 pwd = b->ops->nw_getpwuid(b, uid);
4268                 if (pwd) {
4269                         return pwd;
4270                 }
4271         }
4272
4273         return NULL;
4274 }
4275
4276 struct passwd *getpwuid(uid_t uid)
4277 {
4278         if (!nss_wrapper_enabled()) {
4279                 return libc_getpwuid(uid);
4280         }
4281
4282         return nwrap_getpwuid(uid);
4283 }
4284
4285 /****************************************************************************
4286  *   GETPWUID_R
4287  ***************************************************************************/
4288
4289 static int nwrap_getpwuid_r(uid_t uid, struct passwd *pwdst,
4290                             char *buf, size_t buflen, struct passwd **pwdstp)
4291 {
4292         int i,ret;
4293
4294         for (i=0; i < nwrap_main_global->num_backends; i++) {
4295                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4296                 ret = b->ops->nw_getpwuid_r(b, uid, pwdst, buf, buflen, pwdstp);
4297                 if (ret == ENOENT) {
4298                         continue;
4299                 }
4300                 return ret;
4301         }
4302
4303         return ENOENT;
4304 }
4305
4306 #ifdef HAVE_SOLARIS_GETPWUID_R
4307 int getpwuid_r(uid_t uid, struct passwd *pwdst,
4308                char *buf, int buflen, struct passwd **pwdstp)
4309 #else
4310 int getpwuid_r(uid_t uid, struct passwd *pwdst,
4311                char *buf, size_t buflen, struct passwd **pwdstp)
4312 #endif
4313 {
4314         if (!nss_wrapper_enabled()) {
4315                 return libc_getpwuid_r(uid, pwdst, buf, buflen, pwdstp);
4316         }
4317
4318         return nwrap_getpwuid_r(uid, pwdst, buf, buflen, pwdstp);
4319 }
4320
4321 /****************************************************************************
4322  *   SETPWENT
4323  ***************************************************************************/
4324
4325 static void nwrap_setpwent(void)
4326 {
4327         int i;
4328
4329         for (i=0; i < nwrap_main_global->num_backends; i++) {
4330                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4331                 b->ops->nw_setpwent(b);
4332         }
4333 }
4334
4335 void setpwent(void)
4336 {
4337         if (!nss_wrapper_enabled()) {
4338                 libc_setpwent();
4339                 return;
4340         }
4341
4342         nwrap_setpwent();
4343 }
4344
4345 /****************************************************************************
4346  *   GETPWENT
4347  ***************************************************************************/
4348
4349 static struct passwd *nwrap_getpwent(void)
4350 {
4351         int i;
4352         struct passwd *pwd;
4353
4354         for (i=0; i < nwrap_main_global->num_backends; i++) {
4355                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4356                 pwd = b->ops->nw_getpwent(b);
4357                 if (pwd) {
4358                         return pwd;
4359                 }
4360         }
4361
4362         return NULL;
4363 }
4364
4365 struct passwd *getpwent(void)
4366 {
4367         if (!nss_wrapper_enabled()) {
4368                 return libc_getpwent();
4369         }
4370
4371         return nwrap_getpwent();
4372 }
4373
4374 /****************************************************************************
4375  *   GETPWENT_R
4376  ***************************************************************************/
4377
4378 static int nwrap_getpwent_r(struct passwd *pwdst, char *buf,
4379                             size_t buflen, struct passwd **pwdstp)
4380 {
4381         int i,ret;
4382
4383         for (i=0; i < nwrap_main_global->num_backends; i++) {
4384                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4385                 ret = b->ops->nw_getpwent_r(b, pwdst, buf, buflen, pwdstp);
4386                 if (ret == ENOENT) {
4387                         continue;
4388                 }
4389                 return ret;
4390         }
4391
4392         return ENOENT;
4393 }
4394
4395 #ifdef HAVE_SOLARIS_GETPWENT_R
4396 struct passwd *getpwent_r(struct passwd *pwdst, char *buf, int buflen)
4397 {
4398         struct passwd *pwdstp = NULL;
4399         int rc;
4400
4401         if (!nss_wrapper_enabled()) {
4402                 return libc_getpwent_r(pwdst, buf, buflen);
4403         }
4404         rc = nwrap_getpwent_r(pwdst, buf, buflen, &pwdstp);
4405         if (rc < 0) {
4406                 return NULL;
4407         }
4408
4409         return pwdstp;
4410 }
4411 #else /* HAVE_SOLARIS_GETPWENT_R */
4412 int getpwent_r(struct passwd *pwdst, char *buf,
4413                size_t buflen, struct passwd **pwdstp)
4414 {
4415         if (!nss_wrapper_enabled()) {
4416                 return libc_getpwent_r(pwdst, buf, buflen, pwdstp);
4417         }
4418
4419         return nwrap_getpwent_r(pwdst, buf, buflen, pwdstp);
4420 }
4421 #endif /* HAVE_SOLARIS_GETPWENT_R */
4422
4423 /****************************************************************************
4424  *   ENDPWENT
4425  ***************************************************************************/
4426
4427 static void nwrap_endpwent(void)
4428 {
4429         int i;
4430
4431         for (i=0; i < nwrap_main_global->num_backends; i++) {
4432                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4433                 b->ops->nw_endpwent(b);
4434         }
4435 }
4436
4437 void endpwent(void)
4438 {
4439         if (!nss_wrapper_enabled()) {
4440                 libc_endpwent();
4441                 return;
4442         }
4443
4444         nwrap_endpwent();
4445 }
4446
4447 /****************************************************************************
4448  *   INITGROUPS
4449  ***************************************************************************/
4450
4451 static int nwrap_initgroups(const char *user, gid_t group)
4452 {
4453         int i;
4454
4455         for (i=0; i < nwrap_main_global->num_backends; i++) {
4456                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4457                 int rc;
4458
4459                 rc = b->ops->nw_initgroups(b, user, group);
4460                 if (rc == 0) {
4461                         return 0;
4462                 }
4463         }
4464
4465         errno = ENOENT;
4466         return -1;
4467 }
4468
4469 int initgroups(const char *user, gid_t group)
4470 {
4471         if (!nss_wrapper_enabled()) {
4472                 return libc_initgroups(user, group);
4473         }
4474
4475         return nwrap_initgroups(user, group);
4476 }
4477
4478 /****************************************************************************
4479  *   GETGRNAM
4480  ***************************************************************************/
4481
4482 static struct group *nwrap_getgrnam(const char *name)
4483 {
4484         int i;
4485         struct group *grp;
4486
4487         for (i=0; i < nwrap_main_global->num_backends; i++) {
4488                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4489                 grp = b->ops->nw_getgrnam(b, name);
4490                 if (grp) {
4491                         return grp;
4492                 }
4493         }
4494
4495         return NULL;
4496 }
4497
4498 struct group *getgrnam(const char *name)
4499 {
4500         if (!nss_wrapper_enabled()) {
4501                 return libc_getgrnam(name);
4502         }
4503
4504         return nwrap_getgrnam(name);
4505 }
4506
4507 /****************************************************************************
4508  *   GETGRNAM_R
4509  ***************************************************************************/
4510
4511 static int nwrap_getgrnam_r(const char *name, struct group *grdst,
4512                             char *buf, size_t buflen, struct group **grdstp)
4513 {
4514         int i, ret;
4515
4516         for (i=0; i < nwrap_main_global->num_backends; i++) {
4517                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4518                 ret = b->ops->nw_getgrnam_r(b, name, grdst, buf, buflen, grdstp);
4519                 if (ret == ENOENT) {
4520                         continue;
4521                 }
4522                 return ret;
4523         }
4524
4525         return ENOENT;
4526 }
4527
4528 #ifdef HAVE_GETGRNAM_R
4529 # ifdef HAVE_SOLARIS_GETGRNAM_R
4530 int getgrnam_r(const char *name, struct group *grp,
4531                 char *buf, int buflen, struct group **pgrp)
4532 # else /* HAVE_SOLARIS_GETGRNAM_R */
4533 int getgrnam_r(const char *name, struct group *grp,
4534                char *buf, size_t buflen, struct group **pgrp)
4535 # endif /* HAVE_SOLARIS_GETGRNAM_R */
4536 {
4537         if (!nss_wrapper_enabled()) {
4538                 return libc_getgrnam_r(name,
4539                                        grp,
4540                                        buf,
4541                                        buflen,
4542                                        pgrp);
4543         }
4544
4545         return nwrap_getgrnam_r(name, grp, buf, buflen, pgrp);
4546 }
4547 #endif /* HAVE_GETGRNAM_R */
4548
4549 /****************************************************************************
4550  *   GETGRGID
4551  ***************************************************************************/
4552
4553 static struct group *nwrap_getgrgid(gid_t gid)
4554 {
4555         int i;
4556         struct group *grp;
4557
4558         for (i=0; i < nwrap_main_global->num_backends; i++) {
4559                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4560                 grp = b->ops->nw_getgrgid(b, gid);
4561                 if (grp) {
4562                         return grp;
4563                 }
4564         }
4565
4566         return NULL;
4567 }
4568
4569 struct group *getgrgid(gid_t gid)
4570 {
4571         if (!nss_wrapper_enabled()) {
4572                 return libc_getgrgid(gid);
4573         }
4574
4575         return nwrap_getgrgid(gid);
4576 }
4577
4578 /****************************************************************************
4579  *   GETGRGID_R
4580  ***************************************************************************/
4581
4582 static int nwrap_getgrgid_r(gid_t gid, struct group *grdst,
4583                             char *buf, size_t buflen, struct group **grdstp)
4584 {
4585         int i,ret;
4586
4587         for (i=0; i < nwrap_main_global->num_backends; i++) {
4588                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4589                 ret = b->ops->nw_getgrgid_r(b, gid, grdst, buf, buflen, grdstp);
4590                 if (ret == ENOENT) {
4591                         continue;
4592                 }
4593                 return ret;
4594         }
4595
4596         return ENOENT;
4597 }
4598
4599 #ifdef HAVE_GETGRGID_R
4600 # ifdef HAVE_SOLARIS_GETGRGID_R
4601 int getgrgid_r(gid_t gid, struct group *grdst,
4602                char *buf, int buflen, struct group **grdstp)
4603 # else /* HAVE_SOLARIS_GETGRGID_R */
4604 int getgrgid_r(gid_t gid, struct group *grdst,
4605                char *buf, size_t buflen, struct group **grdstp)
4606 # endif /* HAVE_SOLARIS_GETGRGID_R */
4607 {
4608         if (!nss_wrapper_enabled()) {
4609                 return libc_getgrgid_r(gid, grdst, buf, buflen, grdstp);
4610         }
4611
4612         return nwrap_getgrgid_r(gid, grdst, buf, buflen, grdstp);
4613 }
4614 #endif
4615
4616 /****************************************************************************
4617  *   SETGRENT
4618  ***************************************************************************/
4619
4620 static void nwrap_setgrent(void)
4621 {
4622         int i;
4623
4624         for (i=0; i < nwrap_main_global->num_backends; i++) {
4625                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4626                 b->ops->nw_setgrent(b);
4627         }
4628 }
4629
4630 #ifdef HAVE_BSD_SETGRENT
4631 int setgrent(void)
4632 #else
4633 void setgrent(void)
4634 #endif
4635 {
4636         if (!nss_wrapper_enabled()) {
4637                 libc_setgrent();
4638                 goto out;
4639         }
4640
4641         nwrap_setgrent();
4642
4643 out:
4644 #ifdef HAVE_BSD_SETGRENT
4645         return 0;
4646 #else
4647         return;
4648 #endif
4649 }
4650
4651 /****************************************************************************
4652  *   GETGRENT
4653  ***************************************************************************/
4654
4655 static struct group *nwrap_getgrent(void)
4656 {
4657         int i;
4658         struct group *grp;
4659
4660         for (i=0; i < nwrap_main_global->num_backends; i++) {
4661                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4662                 grp = b->ops->nw_getgrent(b);
4663                 if (grp) {
4664                         return grp;
4665                 }
4666         }
4667
4668         return NULL;
4669 }
4670
4671 struct group *getgrent(void)
4672 {
4673         if (!nss_wrapper_enabled()) {
4674                 return libc_getgrent();
4675         }
4676
4677         return nwrap_getgrent();
4678 }
4679
4680 /****************************************************************************
4681  *   GETGRENT_R
4682  ***************************************************************************/
4683
4684 static int nwrap_getgrent_r(struct group *grdst, char *buf,
4685                             size_t buflen, struct group **grdstp)
4686 {
4687         int i,ret;
4688
4689         for (i=0; i < nwrap_main_global->num_backends; i++) {
4690                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4691                 ret = b->ops->nw_getgrent_r(b, grdst, buf, buflen, grdstp);
4692                 if (ret == ENOENT) {
4693                         continue;
4694                 }
4695                 return ret;
4696         }
4697
4698         return ENOENT;
4699 }
4700
4701 #ifdef HAVE_SOLARIS_GETGRENT_R
4702 struct group *getgrent_r(struct group *src, char *buf, int buflen)
4703 {
4704         struct group *grdstp = NULL;
4705         int rc;
4706
4707         if (!nss_wrapper_enabled()) {
4708                 return libc_getgrent_r(src, buf, buflen);
4709         }
4710
4711         rc = nwrap_getgrent_r(src, buf, buflen, &grdstp);
4712         if (rc < 0) {
4713                 return NULL;
4714         }
4715
4716         return grdstp;
4717 }
4718 #else /* HAVE_SOLARIS_GETGRENT_R */
4719 int getgrent_r(struct group *src, char *buf,
4720                size_t buflen, struct group **grdstp)
4721 {
4722         if (!nss_wrapper_enabled()) {
4723                 return libc_getgrent_r(src, buf, buflen, grdstp);
4724         }
4725
4726         return nwrap_getgrent_r(src, buf, buflen, grdstp);
4727 }
4728 #endif /* HAVE_SOLARIS_GETGRENT_R */
4729
4730 /****************************************************************************
4731  *   ENDGRENT
4732  ***************************************************************************/
4733
4734 static void nwrap_endgrent(void)
4735 {
4736         int i;
4737
4738         for (i=0; i < nwrap_main_global->num_backends; i++) {
4739                 struct nwrap_backend *b = &nwrap_main_global->backends[i];
4740                 b->ops->nw_endgrent(b);
4741         }
4742 }
4743
4744 void endgrent(void)
4745 {
4746         if (!nss_wrapper_enabled()) {
4747                 libc_endgrent();
4748                 return;
4749         }
4750
4751         nwrap_endgrent();
4752 }
4753
4754 /****************************************************************************
4755  *   GETGROUPLIST
4756  ***************************************************************************/
4757
4758 #ifdef HAVE_GETGROUPLIST
4759 static int nwrap_getgrouplist(const char *user, gid_t group,
4760                               gid_t *groups, int *ngroups)
4761 {
4762         struct group *grp;
4763         gid_t *groups_tmp;
4764         int count = 1;
4765
4766         NWRAP_LOG(NWRAP_LOG_DEBUG, "getgrouplist called for %s", user);
4767
4768         groups_tmp = (gid_t *)malloc(count * sizeof(gid_t));
4769         if (!groups_tmp) {
4770                 NWRAP_LOG(NWRAP_LOG_ERROR, "Out of memory");
4771                 errno = ENOMEM;
4772                 return -1;
4773         }
4774         groups_tmp[0] = group;
4775
4776         nwrap_setgrent();
4777         while ((grp = nwrap_getgrent()) != NULL) {
4778                 int i = 0;
4779
4780                 NWRAP_LOG(NWRAP_LOG_DEBUG,
4781                           "Inspecting %s for group membership",
4782                           grp->gr_name);
4783
4784                 for (i=0; grp->gr_mem && grp->gr_mem[i] != NULL; i++) {
4785
4786                         if (group != grp->gr_gid &&
4787                             (strcmp(user, grp->gr_mem[i]) == 0)) {
4788
4789                                 NWRAP_LOG(NWRAP_LOG_DEBUG,
4790                                           "%s is member of %s",
4791                                           user,
4792                                           grp->gr_name);
4793
4794                                 groups_tmp = (gid_t *)realloc(groups_tmp, (count + 1) * sizeof(gid_t));
4795                                 if (!groups_tmp) {
4796                                         NWRAP_LOG(NWRAP_LOG_ERROR,
4797                                                   "Out of memory");
4798                                         errno = ENOMEM;
4799                                         return -1;
4800                                 }
4801                                 groups_tmp[count] = grp->gr_gid;
4802
4803                                 count++;
4804                         }
4805                 }
4806         }
4807
4808         nwrap_endgrent();
4809
4810         NWRAP_LOG(NWRAP_LOG_DEBUG,
4811                   "%s is member of %d groups",
4812                   user, *ngroups);
4813
4814         if (*ngroups < count) {
4815                 *ngroups = count;
4816                 free(groups_tmp);
4817                 return -1;
4818         }
4819
4820         *ngroups = count;
4821         memcpy(groups, groups_tmp, count * sizeof(gid_t));
4822         free(groups_tmp);
4823
4824         return count;
4825 }
4826
4827 int getgrouplist(const char *user, gid_t group, gid_t *groups, int *ngroups)
4828 {
4829         if (!nss_wrapper_enabled()) {
4830                 return libc_getgrouplist(user, group, groups, ngroups);
4831         }
4832
4833         return nwrap_getgrouplist(user, group, groups, ngroups);
4834 }
4835 #endif
4836
4837 /**********************************************************
4838  * SHADOW
4839  **********************************************************/
4840
4841 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
4842
4843 #ifdef HAVE_SETSPENT
4844 static void nwrap_setspent(void)
4845 {
4846         nwrap_files_setspent();
4847 }
4848
4849 void setspent(void)
4850 {
4851         if (!nss_wrapper_shadow_enabled()) {
4852                 return;
4853         }
4854
4855         nwrap_setspent();
4856 }
4857
4858 static struct spwd *nwrap_getspent(void)
4859 {
4860         return nwrap_files_getspent();
4861 }
4862
4863 struct spwd *getspent(void)
4864 {
4865         if (!nss_wrapper_shadow_enabled()) {
4866                 return NULL;
4867         }
4868
4869         return nwrap_getspent();
4870 }
4871
4872 static void nwrap_endspent(void)
4873 {
4874         nwrap_files_endspent();
4875 }
4876
4877 void endspent(void)
4878 {
4879         if (!nss_wrapper_shadow_enabled()) {
4880                 return;
4881         }
4882
4883         nwrap_endspent();
4884 }
4885 #endif /* HAVE_SETSPENT */
4886
4887 static struct spwd *nwrap_getspnam(const char *name)
4888 {
4889         return nwrap_files_getspnam(name);
4890 }
4891
4892 struct spwd *getspnam(const char *name)
4893 {
4894         if (!nss_wrapper_shadow_enabled()) {
4895                 return NULL;
4896         }
4897
4898         return nwrap_getspnam(name);
4899 }
4900
4901 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
4902
4903 /**********************************************************
4904  * NETDB
4905  **********************************************************/
4906
4907 static void nwrap_sethostent(int stayopen) {
4908         (void) stayopen; /* ignored */
4909
4910         nwrap_files_sethostent();
4911 }
4912
4913 #ifdef HAVE_SOLARIS_SETHOSTENT
4914 int sethostent(int stayopen)
4915 {
4916         if (!nss_wrapper_hosts_enabled()) {
4917                 libc_sethostent(stayopen);
4918                 return 0;
4919         }
4920
4921         nwrap_sethostent(stayopen);
4922
4923         return 0;
4924 }
4925 #else /* HAVE_SOLARIS_SETHOSTENT */
4926 void sethostent(int stayopen)
4927 {
4928         if (!nss_wrapper_hosts_enabled()) {
4929                 libc_sethostent(stayopen);
4930                 return;
4931         }
4932
4933         nwrap_sethostent(stayopen);
4934 }
4935 #endif /* HAVE_SOLARIS_SETHOSTENT */
4936
4937 static struct hostent *nwrap_gethostent(void)
4938 {
4939         return nwrap_files_gethostent();
4940 }
4941
4942 struct hostent *gethostent(void) {
4943         if (!nss_wrapper_hosts_enabled()) {
4944                 return libc_gethostent();
4945         }
4946
4947         return nwrap_gethostent();
4948 }
4949
4950 static void nwrap_endhostent(void) {
4951         nwrap_files_endhostent();
4952 }
4953
4954 #ifdef HAVE_SOLARIS_ENDHOSTENT
4955 int endhostent(void)
4956 {
4957         if (!nss_wrapper_hosts_enabled()) {
4958                 libc_endhostent();
4959                 return 0;
4960         }
4961
4962         nwrap_endhostent();
4963
4964         return 0;
4965 }
4966 #else /* HAVE_SOLARIS_ENDHOSTENT */
4967 void endhostent(void)
4968 {
4969         if (!nss_wrapper_hosts_enabled()) {
4970                 libc_endhostent();
4971                 return;
4972         }
4973
4974         nwrap_endhostent();
4975 }
4976 #endif /* HAVE_SOLARIS_ENDHOSTENT */
4977
4978 #ifdef BSD
4979 /* BSD implementation stores data in thread local storage but GLIBC does not */
4980 static __thread struct hostent user_he;
4981 static __thread struct nwrap_vector user_addrlist;
4982 #else
4983 static struct hostent user_he;
4984 static struct nwrap_vector user_addrlist;
4985 #endif /* BSD */
4986 static struct hostent *nwrap_gethostbyname(const char *name)
4987 {
4988         if (nwrap_files_gethostbyname(name, AF_UNSPEC, &user_he, &user_addrlist) == -1) {
4989                 return NULL;
4990         }
4991         return &user_he;
4992 }
4993
4994 struct hostent *gethostbyname(const char *name)
4995 {
4996         if (!nss_wrapper_hosts_enabled()) {
4997                 return libc_gethostbyname(name);
4998         }
4999
5000         return nwrap_gethostbyname(name);
5001 }
5002
5003 /* This is a GNU extension - Also can be found on BSD systems */
5004 #ifdef HAVE_GETHOSTBYNAME2
5005 #ifdef BSD
5006 /* BSD implementation stores data in  thread local storage but GLIBC not */
5007 static __thread struct hostent user_he2;
5008 static __thread struct nwrap_vector user_addrlist2;
5009 #else
5010 static struct hostent user_he2;
5011 static struct nwrap_vector user_addrlist2;
5012 #endif /* BSD */
5013 static struct hostent *nwrap_gethostbyname2(const char *name, int af)
5014 {
5015         if (nwrap_files_gethostbyname(name, af, &user_he2, &user_addrlist2) == -1) {
5016                 return NULL;
5017         }
5018         return &user_he2;
5019 }
5020
5021 struct hostent *gethostbyname2(const char *name, int af)
5022 {
5023         if (!nss_wrapper_hosts_enabled()) {
5024                 return libc_gethostbyname2(name, af);
5025         }
5026
5027         return nwrap_gethostbyname2(name, af);
5028 }
5029 #endif
5030
5031 static struct hostent *nwrap_gethostbyaddr(const void *addr,
5032                                            socklen_t len, int type)
5033 {
5034         return nwrap_files_gethostbyaddr(addr, len, type);
5035 }
5036
5037 struct hostent *gethostbyaddr(const void *addr,
5038                               socklen_t len, int type)
5039 {
5040         if (!nss_wrapper_hosts_enabled()) {
5041                 return libc_gethostbyaddr(addr, len, type);
5042         }
5043
5044         return nwrap_gethostbyaddr(addr, len, type);
5045 }
5046
5047 static const struct addrinfo default_hints =
5048 {
5049         .ai_flags = AI_ADDRCONFIG|AI_V4MAPPED,
5050         .ai_family = AF_UNSPEC,
5051         .ai_socktype = 0,
5052         .ai_protocol = 0,
5053         .ai_addrlen = 0,
5054         .ai_addr = NULL,
5055         .ai_canonname = NULL,
5056         .ai_next = NULL
5057 };
5058
5059 static int nwrap_convert_he_ai(const struct hostent *he,
5060                                unsigned short port,
5061                                const struct addrinfo *hints,
5062                                struct addrinfo **pai,
5063                                bool skip_canonname)
5064 {
5065         struct addrinfo *ai;
5066         socklen_t socklen;
5067
5068         if (he == NULL) {
5069                 return EAI_MEMORY;
5070         }
5071
5072         switch (he->h_addrtype) {
5073                 case AF_INET:
5074                         socklen = sizeof(struct sockaddr_in);
5075                         break;
5076 #ifdef HAVE_IPV6
5077                 case AF_INET6:
5078                         socklen = sizeof(struct sockaddr_in6);
5079                         break;
5080 #endif
5081                 default:
5082                         return EAI_FAMILY;
5083         }
5084
5085         ai = (struct addrinfo *)malloc(sizeof(struct addrinfo) + socklen);
5086         if (ai == NULL) {
5087                 return EAI_MEMORY;
5088         }
5089
5090         ai->ai_flags = hints->ai_flags;
5091         ai->ai_family = he->h_addrtype;
5092         ai->ai_socktype = hints->ai_socktype;
5093         ai->ai_protocol = hints->ai_protocol;
5094         ai->ai_canonname = NULL;
5095
5096         if (ai->ai_socktype == 0) {
5097                 ai->ai_socktype = SOCK_DGRAM;
5098         }
5099         if (ai->ai_protocol == 0) {
5100                 if (ai->ai_socktype == SOCK_DGRAM) {
5101                         ai->ai_protocol = IPPROTO_UDP;
5102                 } else if (ai->ai_socktype == SOCK_STREAM) {
5103                         ai->ai_protocol = IPPROTO_TCP;
5104                 }
5105         }
5106
5107         ai->ai_addrlen = socklen;
5108         ai->ai_addr = (void *)(ai + 1);
5109
5110 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
5111         ai->ai_addr->sa_len = socklen;
5112 #endif
5113         ai->ai_addr->sa_family = he->h_addrtype;
5114
5115         switch (he->h_addrtype) {
5116                 case AF_INET:
5117                 {
5118                         struct sockaddr_in *sinp =
5119                                 (struct sockaddr_in *) ai->ai_addr;
5120
5121                         memset(sinp, 0, sizeof(struct sockaddr_in));
5122
5123                         sinp->sin_port = htons(port);
5124                         sinp->sin_family = AF_INET;
5125
5126                         memset (sinp->sin_zero, '\0', sizeof (sinp->sin_zero));
5127                         memcpy(&sinp->sin_addr, he->h_addr_list[0], he->h_length);
5128
5129                 }
5130                 break;
5131 #ifdef HAVE_IPV6
5132                 case AF_INET6:
5133                 {
5134                         struct sockaddr_in6 *sin6p =
5135                                 (struct sockaddr_in6 *) ai->ai_addr;
5136
5137                         memset(sin6p, 0, sizeof(struct sockaddr_in6));
5138
5139                         sin6p->sin6_port = htons(port);
5140                         sin6p->sin6_family = AF_INET6;
5141
5142                         memcpy(&sin6p->sin6_addr,
5143                                he->h_addr_list[0],
5144                                he->h_length);
5145                 }
5146                 break;
5147 #endif
5148         }
5149
5150         ai->ai_next = NULL;
5151
5152         if (he->h_name && !skip_canonname) {
5153                 ai->ai_canonname = strdup(he->h_name);
5154                 if (ai->ai_canonname == NULL) {
5155                         freeaddrinfo(ai);
5156                         return EAI_MEMORY;
5157                 }
5158         }
5159
5160         *pai = ai;
5161         return 0;
5162 }
5163
5164 static int nwrap_getaddrinfo(const char *node,
5165                              const char *service,
5166                              const struct addrinfo *hints,
5167                              struct addrinfo **res)
5168 {
5169         struct addrinfo *ai = NULL;
5170         unsigned short port = 0;
5171         struct {
5172                 int family;
5173                 union {
5174                         struct in_addr v4;
5175 #ifdef HAVE_IPV6
5176                         struct in6_addr v6;
5177                 } in;
5178 #endif
5179         } addr = {
5180                 .family = AF_UNSPEC,
5181         };
5182         int rc;
5183
5184         if (node == NULL && service == NULL) {
5185                 return EAI_NONAME;
5186         }
5187
5188         if (hints == NULL) {
5189                 hints = &default_hints;
5190         }
5191
5192         /* EAI_BADFLAGS
5193               hints.ai_flags   contains   invalid  flags;  or,  hints.ai_flags
5194               included AI_CANONNAME and name was NULL.
5195         */
5196         if ((hints->ai_flags & AI_CANONNAME) && (node == NULL)) {
5197                 return EAI_BADFLAGS;
5198         }
5199
5200         /* If no node has been specified, let glibc deal with it */
5201         if (node == NULL) {
5202                 int ret;
5203                 struct addrinfo *p = NULL;
5204
5205                 ret = libc_getaddrinfo(node, service, hints, &p);
5206
5207                 if (ret == 0) {
5208                         *res = p;
5209                 }
5210                 return ret;
5211         }
5212
5213         if (service != NULL && service[0] != '\0') {
5214                 const char *proto = NULL;
5215                 struct servent *s;
5216                 char *end_ptr;
5217                 long sl;
5218
5219                 errno = 0;
5220                 sl = strtol(service, &end_ptr, 10);
5221
5222                 if (*end_ptr == '\0') {
5223                         port = sl;
5224                         goto valid_port;
5225                 } else if (hints->ai_flags & AI_NUMERICSERV) {
5226                         return EAI_NONAME;
5227                 }
5228
5229                 if (hints->ai_protocol != 0) {
5230                         struct protoent *pent;
5231
5232                         pent = getprotobynumber(hints->ai_protocol);
5233                         if (pent != NULL) {
5234                                 proto = pent->p_name;
5235                         }
5236                 }
5237
5238                 s = getservbyname(service, proto);
5239                 if (s == NULL) {
5240                         return EAI_NONAME;
5241                 }
5242                 port = ntohs(s->s_port);
5243         }
5244
5245 valid_port:
5246
5247         rc = inet_pton(AF_INET, node, &addr.in.v4);
5248         if (rc == 1) {
5249                 addr.family = AF_INET;
5250         }
5251 #ifdef HAVE_IPV6
5252         if (addr.family == AF_UNSPEC) {
5253                 rc = inet_pton(AF_INET6, node, &addr.in.v6);
5254                 if (rc == 1) {
5255                         addr.family = AF_INET6;
5256                 }
5257         }
5258 #endif
5259
5260         if (addr.family == AF_UNSPEC) {
5261                if (hints->ai_flags & AI_NUMERICHOST) {
5262                         return EAI_NONAME;
5263                 }
5264         } else if ((hints->ai_family != AF_UNSPEC) &&
5265                    (hints->ai_family != addr.family))
5266         {
5267                 return EAI_ADDRFAMILY;
5268         }
5269
5270         rc = nwrap_files_getaddrinfo(node, port, hints, &ai);
5271         if (rc != 0) {
5272                 int ret;
5273                 struct addrinfo *p = NULL;
5274
5275                 ret = libc_getaddrinfo(node, service, hints, &p);
5276
5277                 if (ret == 0) {
5278                         /*
5279                          * nwrap_files_getaddrinfo failed, but libc was
5280                          * successful -- use the result from libc.
5281                          */
5282                         *res = p;
5283                         return 0;
5284                 }
5285
5286                 return rc;
5287         }
5288
5289         /*
5290          * If the socktype was not specified, duplicate
5291          * each ai returned, so that we have variants for
5292          * both UDP and TCP.
5293          */
5294         if (hints->ai_socktype == 0) {
5295                 struct addrinfo *ai_cur;
5296
5297                 /* freeaddrinfo() frees ai_canonname and ai so allocate them */
5298                 for (ai_cur = ai; ai_cur != NULL; ai_cur = ai_cur->ai_next) {
5299                         struct addrinfo *ai_new;
5300
5301                         /* duplicate the current entry */
5302
5303                         ai_new = malloc(sizeof(struct addrinfo));
5304                         if (ai_new == NULL) {
5305                                 freeaddrinfo(ai);
5306                                 return EAI_MEMORY;
5307                         }
5308
5309                         memcpy(ai_new, ai_cur, sizeof(struct addrinfo));
5310                         ai_new->ai_next = NULL;
5311
5312                         /* We need a deep copy or freeaddrinfo() will blow up */
5313                         if (ai_cur->ai_canonname != NULL) {
5314                                 ai_new->ai_canonname =
5315                                         strdup(ai_cur->ai_canonname);
5316                         }
5317
5318                         if (ai_cur->ai_socktype == SOCK_DGRAM) {
5319                                 ai_new->ai_socktype = SOCK_STREAM;
5320                         } else if (ai_cur->ai_socktype == SOCK_STREAM) {
5321                                 ai_new->ai_socktype = SOCK_DGRAM;
5322                         }
5323                         if (ai_cur->ai_protocol == IPPROTO_TCP) {
5324                                 ai_new->ai_protocol = IPPROTO_UDP;
5325                         } else if (ai_cur->ai_protocol == IPPROTO_UDP) {
5326                                 ai_new->ai_protocol = IPPROTO_TCP;
5327                         }
5328
5329                         /* now insert the new entry */
5330
5331                         ai_new->ai_next = ai_cur->ai_next;
5332                         ai_cur->ai_next = ai_new;
5333
5334                         /* and move on (don't duplicate the new entry) */
5335
5336                         ai_cur = ai_new;
5337                 }
5338         }
5339
5340         *res = ai;
5341
5342         return 0;
5343 }
5344
5345 int getaddrinfo(const char *node, const char *service,
5346                 const struct addrinfo *hints,
5347                 struct addrinfo **res)
5348 {
5349         if (!nss_wrapper_hosts_enabled()) {
5350                 return libc_getaddrinfo(node, service, hints, res);
5351         }
5352
5353         return nwrap_getaddrinfo(node, service, hints, res);
5354 }
5355
5356 static int nwrap_getnameinfo(const struct sockaddr *sa, socklen_t salen,
5357                              char *host, size_t hostlen,
5358                              char *serv, size_t servlen,
5359                              int flags)
5360 {
5361         struct hostent *he;
5362         struct servent *service;
5363         const char *proto;
5364         const void *addr;
5365         socklen_t addrlen;
5366         uint16_t port;
5367         sa_family_t type;
5368
5369         if (sa == NULL || salen < sizeof(sa_family_t)) {
5370                 return EAI_FAMILY;
5371         }
5372
5373         if ((flags & NI_NAMEREQD) && host == NULL && serv == NULL) {
5374                 return EAI_NONAME;
5375         }
5376
5377         type = sa->sa_family;
5378         switch (type) {
5379         case AF_INET:
5380                 if (salen < sizeof(struct sockaddr_in))
5381                         return EAI_FAMILY;
5382                 addr = &((const struct sockaddr_in *)sa)->sin_addr;
5383                 addrlen = sizeof(((const struct sockaddr_in *)sa)->sin_addr);
5384                 port = ntohs(((const struct sockaddr_in *)sa)->sin_port);
5385                 break;
5386 #ifdef HAVE_IPV6
5387         case AF_INET6:
5388                 if (salen < sizeof(struct sockaddr_in6))
5389                         return EAI_FAMILY;
5390                 addr = &((const struct sockaddr_in6 *)sa)->sin6_addr;
5391                 addrlen = sizeof(((const struct sockaddr_in6 *)sa)->sin6_addr);
5392                 port = ntohs(((const struct sockaddr_in6 *)sa)->sin6_port);
5393                 break;
5394 #endif
5395         default:
5396                 return EAI_FAMILY;
5397         }
5398
5399         if (host != NULL) {
5400                 he = NULL;
5401                 if ((flags & NI_NUMERICHOST) == 0) {
5402                         he = nwrap_files_gethostbyaddr(addr, addrlen, type);
5403                         if ((flags & NI_NAMEREQD) && (he == NULL || he->h_name == NULL))
5404                                 return EAI_NONAME;
5405                 }
5406                 if (he != NULL && he->h_name != NULL) {
5407                         if (strlen(he->h_name) >= hostlen)
5408                                 return EAI_OVERFLOW;
5409                         strcpy(host, he->h_name);
5410                         if (flags & NI_NOFQDN)
5411                                 host[strcspn(host, ".")] = '\0';
5412                 } else {
5413                         if (inet_ntop(type, addr, host, hostlen) == NULL)
5414                                 return (errno == ENOSPC) ? EAI_OVERFLOW : EAI_FAIL;
5415                 }
5416         }
5417
5418         if (serv != NULL) {
5419                 service = NULL;
5420                 if ((flags & NI_NUMERICSERV) == 0) {
5421                         proto = (flags & NI_DGRAM) ? "udp" : "tcp";
5422                         service = getservbyport(htons(port), proto);
5423                 }
5424                 if (service != NULL) {
5425                         if (strlen(service->s_name) >= servlen)
5426                                 return EAI_OVERFLOW;
5427                         strcpy(serv, service->s_name);
5428                 } else {
5429                         if (snprintf(serv, servlen, "%u", port) >= (int) servlen)
5430                                 return EAI_OVERFLOW;
5431                 }
5432         }
5433
5434         return 0;
5435 }
5436
5437 #ifdef HAVE_LINUX_GETNAMEINFO
5438 int getnameinfo(const struct sockaddr *sa, socklen_t salen,
5439                 char *host, socklen_t hostlen,
5440                 char *serv, socklen_t servlen,
5441                 int flags)
5442 #elif defined(HAVE_LINUX_GETNAMEINFO_UNSIGNED)
5443 int getnameinfo(const struct sockaddr *sa, socklen_t salen,
5444                 char *host, socklen_t hostlen,
5445                 char *serv, socklen_t servlen,
5446                 unsigned int flags)
5447 #else
5448 int getnameinfo(const struct sockaddr *sa, socklen_t salen,
5449                 char *host, size_t hostlen,
5450                 char *serv, size_t servlen,
5451                 int flags)
5452 #endif
5453 {
5454         if (!nss_wrapper_hosts_enabled()) {
5455                 return libc_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
5456         }
5457
5458         return nwrap_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
5459 }
5460
5461 static int nwrap_gethostname(char *name, size_t len)
5462 {
5463         const char *hostname = getenv("NSS_WRAPPER_HOSTNAME");
5464
5465         if (strlen(hostname) >= len) {
5466                 errno = ENAMETOOLONG;
5467                 return -1;
5468         }
5469         snprintf(name, len, "%s", hostname);
5470
5471         return 0;
5472 }
5473
5474 #ifdef HAVE_SOLARIS_GETHOSTNAME
5475 int gethostname(char *name, int len)
5476 #else /* HAVE_SOLARIS_GETHOSTNAME */
5477 int gethostname(char *name, size_t len)
5478 #endif /* HAVE_SOLARIS_GETHOSTNAME */
5479 {
5480         if (!nwrap_hostname_enabled()) {
5481                 return libc_gethostname(name, len);
5482         }
5483
5484         return nwrap_gethostname(name, len);
5485 }
5486
5487 /****************************
5488  * DESTRUCTOR
5489  ***************************/
5490
5491 /*
5492  * This function is called when the library is unloaded and makes sure that
5493  * sockets get closed and the unix file for the socket are unlinked.
5494  */
5495 void nwrap_destructor(void)
5496 {
5497         int i;
5498
5499         NWRAP_LOCK_ALL;
5500         if (nwrap_main_global != NULL) {
5501                 struct nwrap_main *m = nwrap_main_global;
5502
5503                 /* libc */
5504                 SAFE_FREE(m->libc->fns);
5505                 if (m->libc->handle != NULL) {
5506                         dlclose(m->libc->handle);
5507                 }
5508                 if (m->libc->nsl_handle != NULL) {
5509                         dlclose(m->libc->nsl_handle);
5510                 }
5511                 if (m->libc->sock_handle != NULL) {
5512                         dlclose(m->libc->sock_handle);
5513                 }
5514                 SAFE_FREE(m->libc);
5515
5516                 /* backends */
5517                 for (i = 0; i < m->num_backends; i++) {
5518                         struct nwrap_backend *b = &(m->backends[i]);
5519
5520                         if (b->so_handle != NULL) {
5521                                 dlclose(b->so_handle);
5522                         }
5523                         SAFE_FREE(b->fns);
5524                 }
5525                 SAFE_FREE(m->backends);
5526         }
5527
5528         if (nwrap_pw_global.cache != NULL) {
5529                 struct nwrap_cache *c = nwrap_pw_global.cache;
5530
5531                 nwrap_files_cache_unload(c);
5532                 if (c->fd >= 0) {
5533                         fclose(c->fp);
5534                         c->fd = -1;
5535                 }
5536
5537                 SAFE_FREE(nwrap_pw_global.list);
5538                 nwrap_pw_global.num = 0;
5539         }
5540
5541         if (nwrap_gr_global.cache != NULL) {
5542                 struct nwrap_cache *c = nwrap_gr_global.cache;
5543
5544                 nwrap_files_cache_unload(c);
5545                 if (c->fd >= 0) {
5546                         fclose(c->fp);
5547                         c->fd = -1;
5548                 }
5549
5550                 SAFE_FREE(nwrap_gr_global.list);
5551                 nwrap_pw_global.num = 0;
5552         }
5553
5554 #if defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM)
5555         if (nwrap_sp_global.cache != NULL) {
5556                 struct nwrap_cache *c = nwrap_sp_global.cache;
5557
5558                 nwrap_files_cache_unload(c);
5559                 if (c->fd >= 0) {
5560                         fclose(c->fp);
5561                         c->fd = -1;
5562                 }
5563
5564                 nwrap_sp_global.num = 0;
5565         }
5566 #endif /* defined(HAVE_SHADOW_H) && defined(HAVE_GETSPNAM) */
5567
5568         if (nwrap_he_global.cache != NULL) {
5569                 struct nwrap_cache *c = nwrap_he_global.cache;
5570
5571                 nwrap_files_cache_unload(c);
5572                 if (c->fd >= 0) {
5573                         fclose(c->fp);
5574                         c->fd = -1;
5575                 }
5576
5577                 nwrap_he_global.num = 0;
5578         }
5579
5580         free(user_addrlist.items);
5581 #ifdef HAVE_GETHOSTBYNAME2
5582         free(user_addrlist2.items);
5583 #endif
5584
5585         hdestroy();
5586         NWRAP_UNLOCK_ALL;
5587 }