lib/libc/gen/getpwent.c

   1 /*-
   2  * Copyright (c) 2003 Networks Associates Technology, Inc.
   3  * All rights reserved.
   4  *
   5  * This software was developed for the FreeBSD Project by
   6  * Jacques A. Vidrine, Safeport Network Services, and Network
   7  * Associates Laboratories, the Security Research Division of Network
   8  * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
   9  * ("CBOSS"), as part of the DARPA CHATS research program.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/lib/libc/gen/getpwent.c,v 1.90 2006/04/28 12:03:35 ume Exp $
  33  * $DragonFly: src/lib/libc/gen/getpwent.c,v 1.7 2005/11/19 22:32:53 swildner Exp $
  34  */
  35
  36 #include "namespace.h"
  37 #include <sys/param.h>
  38 #ifdef YP
  39 #include <rpc/rpc.h>
  40 #include <rpcsvc/yp_prot.h>
  41 #include <rpcsvc/ypclnt.h>
  42 #endif
  43 #include <arpa/inet.h>
  44 #include <errno.h>
  45 #include <fcntl.h>
  46 #ifdef HESIOD
  47 #include <hesiod.h>
  48 #endif
  49 #include <netdb.h>
  50 #include <nsswitch.h>
  51 #include <pthread.h>
  52 #include <pthread_np.h>
  53 #include <pwd.h>
  54 #include <stdlib.h>
  55 #include <stdio.h>
  56 #include <string.h>
  57 #include <syslog.h>
  58 #include <unistd.h>
  59 #include "un-namespace.h"
  60 #include <db.h>
  61 #include "libc_private.h"
  62 #include "pw_scan.h"
  63 #include "nss_tls.h"
  64 #ifdef NS_CACHING
  65 #include "nscache.h"
  66 #endif
  67
  68 #ifndef CTASSERT
  69 #define CTASSERT(x)             _CTASSERT(x, __LINE__)
  70 #define _CTASSERT(x, y)         __CTASSERT(x, y)
  71 #define __CTASSERT(x, y)        typedef char __assert_ ## y [(x) ? 1 : -1]
  72 #endif
  73
  74 /* Counter as stored in /etc/pwd.db */
  75 typedef int             pwkeynum;
  76
  77 CTASSERT(MAXLOGNAME > sizeof(uid_t));
  78 CTASSERT(MAXLOGNAME > sizeof(pwkeynum));
  79
  80 enum constants {
  81         PWD_STORAGE_INITIAL     = 1 << 10, /* 1 KByte */
  82         PWD_STORAGE_MAX         = 1 << 20, /* 1 MByte */
  83         SETPWENT                = 1,
  84         ENDPWENT                = 2,
  85         HESIOD_NAME_MAX         = 256
  86 };
  87
  88 static const ns_src defaultsrc[] = {
  89         { NSSRC_COMPAT, NS_SUCCESS },
  90         { NULL, 0 }
  91 };
  92
  93 int     __pw_match_entry(const char *, size_t, enum nss_lookup_type,
  94             const char *, uid_t);
  95 int     __pw_parse_entry(char *, size_t, struct passwd *, int, int *errnop);
  96
  97 static  void     pwd_init(struct passwd *);
  98
  99 union key {
 100         const char      *name;
 101         uid_t            uid;
 102 };
 103
 104 static  struct passwd *getpw(int (*fn)(union key, struct passwd *, char *,
 105                     size_t, struct passwd **), union key);
 106 static  int      wrap_getpwnam_r(union key, struct passwd *, char *,
 107                     size_t, struct passwd **);
 108 static  int      wrap_getpwuid_r(union key, struct passwd *, char *, size_t,
 109                     struct passwd **);
 110 static  int      wrap_getpwent_r(union key, struct passwd *, char *, size_t,
 111                     struct passwd **);
 112
 113 static  int      pwdb_match_entry_v3(char *, size_t, enum nss_lookup_type,
 114                     const char *, uid_t);
 115 static  int      pwdb_parse_entry_v3(char *, size_t, struct passwd *, int *);
 116 static  int      pwdb_match_entry_v4(char *, size_t, enum nss_lookup_type,
 117                     const char *, uid_t);
 118 static  int      pwdb_parse_entry_v4(char *, size_t, struct passwd *, int *);
 119
 120
 121 struct {
 122         int     (*match)(char *, size_t, enum nss_lookup_type, const char *,
 123                     uid_t);
 124         int     (*parse)(char *, size_t, struct passwd *, int *);
 125 } pwdb_versions[] = {
 126         { NULL, NULL },                                 /* version 0 */
 127         { NULL, NULL },                                 /* version 1 */
 128         { NULL, NULL },                                 /* version 2 */
 129         { pwdb_match_entry_v3, pwdb_parse_entry_v3 },   /* version 3 */
 130         { pwdb_match_entry_v4, pwdb_parse_entry_v4 },   /* version 4 */
 131 };
 132
 133
 134 struct files_state {
 135         DB              *db;
 136         pwkeynum         keynum;
 137         int              stayopen;
 138         int              version;
 139 };
 140 static  void    files_endstate(void *);
 141 NSS_TLS_HANDLING(files);
 142 static  DB      *pwdbopen(int *);
 143 static  void     files_endstate(void *);
 144 static  int      files_setpwent(void *, void *, va_list);
 145 static  int      files_passwd(void *, void *, va_list);
 146
 147
 148 #ifdef HESIOD
 149 struct dns_state {
 150         long    counter;
 151 };
 152 static  void    dns_endstate(void *);
 153 NSS_TLS_HANDLING(dns);
 154 static  int      dns_setpwent(void *, void *, va_list);
 155 static  int      dns_passwd(void *, void *, va_list);
 156 #endif
 157
 158
 159 #ifdef YP
 160 struct nis_state {
 161         char     domain[MAXHOSTNAMELEN];
 162         int      done;
 163         char    *key;
 164         int      keylen;
 165 };
 166 static  void     nis_endstate(void *);
 167 NSS_TLS_HANDLING(nis);
 168 static  int      nis_setpwent(void *, void *, va_list);
 169 static  int      nis_passwd(void *, void *, va_list);
 170 static  int      nis_map(char *, enum nss_lookup_type, char *, size_t, int *);
 171 static  int      nis_adjunct(char *, const char *, char *, size_t);
 172 #endif
 173
 174
 175 struct compat_state {
 176         DB              *db;
 177         pwkeynum         keynum;
 178         int              stayopen;
 179         int              version;
 180         DB              *exclude;
 181         struct passwd    template;
 182         char            *name;
 183         enum _compat {
 184                 COMPAT_MODE_OFF = 0,
 185                 COMPAT_MODE_ALL,
 186                 COMPAT_MODE_NAME,
 187                 COMPAT_MODE_NETGROUP
 188         }                compat;
 189 };
 190 static  void     compat_endstate(void *);
 191 NSS_TLS_HANDLING(compat);
 192 static  int      compat_setpwent(void *, void *, va_list);
 193 static  int      compat_passwd(void *, void *, va_list);
 194 static  void     compat_clear_template(struct passwd *);
 195 static  int      compat_set_template(struct passwd *, struct passwd *);
 196 static  int      compat_use_template(struct passwd *, struct passwd *, char *,
 197                     size_t);
 198 static  int      compat_redispatch(struct compat_state *, enum nss_lookup_type,
 199                     enum nss_lookup_type, const char *, const char *, uid_t,
 200                     struct passwd *, char *, size_t, int *);
 201
 202 #ifdef NS_CACHING
 203 static  int      pwd_id_func(char *, size_t *, va_list ap, void *);
 204 static  int      pwd_marshal_func(char *, size_t *, void *, va_list, void *);
 205 static  int      pwd_unmarshal_func(char *, size_t, void *, va_list, void *);
 206
 207 static int
 208 pwd_id_func(char *buffer, size_t *buffer_size, va_list ap, void *cache_mdata)
 209 {
 210         char    *name;
 211         uid_t   uid;
 212         size_t  size, desired_size;
 213         int     res = NS_UNAVAIL;
 214         enum nss_lookup_type lookup_type;
 215
 216         lookup_type = (enum nss_lookup_type)cache_mdata;
 217         switch (lookup_type) {
 218         case nss_lt_name:
 219                 name = va_arg(ap, char *);
 220                 size = strlen(name);
 221                 desired_size = sizeof(enum nss_lookup_type) + size + 1;
 222                 if (desired_size > *buffer_size) {
 223                         res = NS_RETURN;
 224                         goto fin;
 225                 }
 226
 227                 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
 228                 memcpy(buffer + sizeof(enum nss_lookup_type), name, size + 1);
 229
 230                 res = NS_SUCCESS;
 231                 break;
 232         case nss_lt_id:
 233                 uid = va_arg(ap, uid_t);
 234                 desired_size = sizeof(enum nss_lookup_type) + sizeof(uid_t);
 235                 if (desired_size > *buffer_size) {
 236                         res = NS_RETURN;
 237                         goto fin;
 238                 }
 239
 240                 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
 241                 memcpy(buffer + sizeof(enum nss_lookup_type), &uid,
 242                     sizeof(uid_t));
 243
 244                 res = NS_SUCCESS;
 245                 break;
 246         default:
 247                 /* should be unreachable */
 248                 return (NS_UNAVAIL);
 249         }
 250
 251 fin:
 252         *buffer_size = desired_size;
 253         return (res);
 254 }
 255
 256 static int
 257 pwd_marshal_func(char *buffer, size_t *buffer_size, void *retval, va_list ap,
 258     void *cache_mdata)
 259 {
 260         char *name;
 261         uid_t uid;
 262         struct passwd *pwd;
 263         char *orig_buf;
 264         size_t orig_buf_size;
 265
 266         struct passwd new_pwd;
 267         size_t desired_size, size;
 268         char *p;
 269
 270         switch ((enum nss_lookup_type)cache_mdata) {
 271         case nss_lt_name:
 272                 name = va_arg(ap, char *);
 273                 break;
 274         case nss_lt_id:
 275                 uid = va_arg(ap, uid_t);
 276                 break;
 277         case nss_lt_all:
 278                 break;
 279         default:
 280                 /* should be unreachable */
 281                 return (NS_UNAVAIL);
 282         }
 283
 284         pwd = va_arg(ap, struct passwd *);
 285         orig_buf = va_arg(ap, char *);
 286         orig_buf_size = va_arg(ap, size_t);
 287
 288         desired_size = sizeof(struct passwd) + sizeof(char *) +
 289             strlen(pwd->pw_name) + 1;
 290         if (pwd->pw_passwd != NULL)
 291                 desired_size += strlen(pwd->pw_passwd) + 1;
 292         if (pwd->pw_class != NULL)
 293                 desired_size += strlen(pwd->pw_class) + 1;
 294         if (pwd->pw_gecos != NULL)
 295                 desired_size += strlen(pwd->pw_gecos) + 1;
 296         if (pwd->pw_dir != NULL)
 297                 desired_size += strlen(pwd->pw_dir) + 1;
 298         if (pwd->pw_shell != NULL)
 299                 desired_size += strlen(pwd->pw_shell) + 1;
 300
 301         if (*buffer_size < desired_size) {
 302                 /* this assignment is here for future use */
 303                 *buffer_size = desired_size;
 304                 return (NS_RETURN);
 305         }
 306
 307         memcpy(&new_pwd, pwd, sizeof(struct passwd));
 308         memset(buffer, 0, desired_size);
 309
 310         *buffer_size = desired_size;
 311         p = buffer + sizeof(struct passwd) + sizeof(char *);
 312         memcpy(buffer + sizeof(struct passwd), &p, sizeof(char *));
 313
 314         if (new_pwd.pw_name != NULL) {
 315                 size = strlen(new_pwd.pw_name);
 316                 memcpy(p, new_pwd.pw_name, size);
 317                 new_pwd.pw_name = p;
 318                 p += size + 1;
 319         }
 320
 321         if (new_pwd.pw_passwd != NULL) {
 322                 size = strlen(new_pwd.pw_passwd);
 323                 memcpy(p, new_pwd.pw_passwd, size);
 324                 new_pwd.pw_passwd = p;
 325                 p += size + 1;
 326         }
 327
 328         if (new_pwd.pw_class != NULL) {
 329                 size = strlen(new_pwd.pw_class);
 330                 memcpy(p, new_pwd.pw_class, size);
 331                 new_pwd.pw_class = p;
 332                 p += size + 1;
 333         }
 334
 335         if (new_pwd.pw_gecos != NULL) {
 336                 size = strlen(new_pwd.pw_gecos);
 337                 memcpy(p, new_pwd.pw_gecos, size);
 338                 new_pwd.pw_gecos = p;
 339                 p += size + 1;
 340         }
 341
 342         if (new_pwd.pw_dir != NULL) {
 343                 size = strlen(new_pwd.pw_dir);
 344                 memcpy(p, new_pwd.pw_dir, size);
 345                 new_pwd.pw_dir = p;
 346                 p += size + 1;
 347         }
 348
 349         if (new_pwd.pw_shell != NULL) {
 350                 size = strlen(new_pwd.pw_shell);
 351                 memcpy(p, new_pwd.pw_shell, size);
 352                 new_pwd.pw_shell = p;
 353                 p += size + 1;
 354         }
 355
 356         memcpy(buffer, &new_pwd, sizeof(struct passwd));
 357         return (NS_SUCCESS);
 358 }
 359
 360 static int
 361 pwd_unmarshal_func(char *buffer, size_t buffer_size, void *retval, va_list ap,
 362     void *cache_mdata)
 363 {
 364         char *name;
 365         uid_t uid;
 366         struct passwd *pwd;
 367         char *orig_buf;
 368         size_t orig_buf_size;
 369         int *ret_errno;
 370
 371         char *p;
 372
 373         switch ((enum nss_lookup_type)cache_mdata) {
 374         case nss_lt_name:
 375                 name = va_arg(ap, char *);
 376                 break;
 377         case nss_lt_id:
 378                 uid = va_arg(ap, uid_t);
 379                 break;
 380         case nss_lt_all:
 381                 break;
 382         default:
 383                 /* should be unreachable */
 384                 return (NS_UNAVAIL);
 385         }
 386
 387         pwd = va_arg(ap, struct passwd *);
 388         orig_buf = va_arg(ap, char *);
 389         orig_buf_size = va_arg(ap, size_t);
 390         ret_errno = va_arg(ap, int *);
 391
 392         if (orig_buf_size <
 393             buffer_size - sizeof(struct passwd) - sizeof(char *)) {
 394                 *ret_errno = ERANGE;
 395                 return (NS_RETURN);
 396         }
 397
 398         memcpy(pwd, buffer, sizeof(struct passwd));
 399         memcpy(&p, buffer + sizeof(struct passwd), sizeof(char *));
 400         memcpy(orig_buf, buffer + sizeof(struct passwd) + sizeof(char *),
 401             buffer_size - sizeof(struct passwd) - sizeof(char *));
 402
 403         NS_APPLY_OFFSET(pwd->pw_name, orig_buf, p, char *);
 404         NS_APPLY_OFFSET(pwd->pw_passwd, orig_buf, p, char *);
 405         NS_APPLY_OFFSET(pwd->pw_class, orig_buf, p, char *);
 406         NS_APPLY_OFFSET(pwd->pw_gecos, orig_buf, p, char *);
 407         NS_APPLY_OFFSET(pwd->pw_dir, orig_buf, p, char *);
 408         NS_APPLY_OFFSET(pwd->pw_shell, orig_buf, p, char *);
 409
 410         if (retval != NULL)
 411                 *((struct passwd **)retval) = pwd;
 412
 413         return (NS_SUCCESS);
 414 }
 415
 416 NSS_MP_CACHE_HANDLING(passwd);
 417 #endif /* NS_CACHING */
 418
 419 void
 420 setpwent(void)
 421 {
 422 #ifdef NS_CACHING
 423         static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
 424                 passwd, (void *)nss_lt_all,
 425                 NULL, NULL);
 426 #endif
 427
 428         static const ns_dtab dtab[] = {
 429                 { NSSRC_FILES, files_setpwent, (void *)SETPWENT },
 430 #ifdef HESIOD
 431                 { NSSRC_DNS, dns_setpwent, (void *)SETPWENT },
 432 #endif
 433 #ifdef YP
 434                 { NSSRC_NIS, nis_setpwent, (void *)SETPWENT },
 435 #endif
 436                 { NSSRC_COMPAT, compat_setpwent, (void *)SETPWENT },
 437 #ifdef NS_CACHING
 438                 NS_CACHE_CB(&cache_info)
 439 #endif
 440                 { NULL, NULL, NULL }
 441         };
 442         _nsdispatch(NULL, dtab, NSDB_PASSWD, "setpwent", defaultsrc, 0);
 443 }
 444
 445
 446 int
 447 setpassent(int stayopen)
 448 {
 449 #ifdef NS_CACHING
 450         static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
 451                 passwd, (void *)nss_lt_all,
 452                 NULL, NULL);
 453 #endif
 454
 455         static const ns_dtab dtab[] = {
 456                 { NSSRC_FILES, files_setpwent, (void *)SETPWENT },
 457 #ifdef HESIOD
 458                 { NSSRC_DNS, dns_setpwent, (void *)SETPWENT },
 459 #endif
 460 #ifdef YP
 461                 { NSSRC_NIS, nis_setpwent, (void *)SETPWENT },
 462 #endif
 463                 { NSSRC_COMPAT, compat_setpwent, (void *)SETPWENT },
 464 #ifdef NS_CACHING
 465                 NS_CACHE_CB(&cache_info)
 466 #endif
 467                 { NULL, NULL, NULL }
 468         };
 469         _nsdispatch(NULL, dtab, NSDB_PASSWD, "setpwent", defaultsrc, stayopen);
 470         return (1);
 471 }
 472
 473
 474 void
 475 endpwent(void)
 476 {
 477 #ifdef NS_CACHING
 478         static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
 479                 passwd, (void *)nss_lt_all,
 480                 NULL, NULL);
 481 #endif
 482
 483         static const ns_dtab dtab[] = {
 484                 { NSSRC_FILES, files_setpwent, (void *)ENDPWENT },
 485 #ifdef HESIOD
 486                 { NSSRC_DNS, dns_setpwent, (void *)ENDPWENT },
 487 #endif
 488 #ifdef YP
 489                 { NSSRC_NIS, nis_setpwent, (void *)ENDPWENT },
 490 #endif
 491                 { NSSRC_COMPAT, compat_setpwent, (void *)ENDPWENT },
 492 #ifdef NS_CACHING
 493                 NS_CACHE_CB(&cache_info)
 494 #endif
 495                 { NULL, NULL, NULL }
 496         };
 497         _nsdispatch(NULL, dtab, NSDB_PASSWD, "endpwent", defaultsrc);
 498 }
 499
 500
 501 int
 502 getpwent_r(struct passwd *pwd, char *buffer, size_t bufsize,
 503     struct passwd **result)
 504 {
 505 #ifdef NS_CACHING
 506         static const nss_cache_info cache_info = NS_MP_CACHE_INFO_INITIALIZER(
 507                 passwd, (void *)nss_lt_all,
 508                 pwd_marshal_func, pwd_unmarshal_func);
 509 #endif
 510
 511         static const ns_dtab dtab[] = {
 512                 { NSSRC_FILES, files_passwd, (void *)nss_lt_all },
 513 #ifdef HESIOD
 514                 { NSSRC_DNS, dns_passwd, (void *)nss_lt_all },
 515 #endif
 516 #ifdef YP
 517                 { NSSRC_NIS, nis_passwd, (void *)nss_lt_all },
 518 #endif
 519                 { NSSRC_COMPAT, compat_passwd, (void *)nss_lt_all },
 520 #ifdef NS_CACHING
 521                 NS_CACHE_CB(&cache_info)
 522 #endif
 523                 { NULL, NULL, NULL }
 524         };
 525         int     rv, ret_errno;
 526
 527         pwd_init(pwd);
 528         ret_errno = 0;
 529         *result = NULL;
 530         rv = _nsdispatch(result, dtab, NSDB_PASSWD, "getpwent_r", defaultsrc,
 531             pwd, buffer, bufsize, &ret_errno);
 532         if (rv == NS_SUCCESS)
 533                 return (0);
 534         else
 535                 return (ret_errno);
 536 }
 537
 538
 539 int
 540 getpwnam_r(const char *name, struct passwd *pwd, char *buffer, size_t bufsize,
 541     struct passwd **result)
 542 {
 543 #ifdef NS_CACHING
 544         static const nss_cache_info cache_info =
 545                 NS_COMMON_CACHE_INFO_INITIALIZER(
 546                 passwd, (void *)nss_lt_name,
 547                 pwd_id_func, pwd_marshal_func, pwd_unmarshal_func);
 548 #endif
 549
 550         static const ns_dtab dtab[] = {
 551                 { NSSRC_FILES, files_passwd, (void *)nss_lt_name },
 552 #ifdef HESIOD
 553                 { NSSRC_DNS, dns_passwd, (void *)nss_lt_name },
 554 #endif
 555 #ifdef YP
 556                 { NSSRC_NIS, nis_passwd, (void *)nss_lt_name },
 557 #endif
 558                 { NSSRC_COMPAT, compat_passwd, (void *)nss_lt_name },
 559 #ifdef NS_CACHING
 560                 NS_CACHE_CB(&cache_info)
 561 #endif
 562                 { NULL, NULL, NULL }
 563         };
 564         int     rv, ret_errno;
 565
 566         pwd_init(pwd);
 567         ret_errno = 0;
 568         *result = NULL;
 569         rv = _nsdispatch(result, dtab, NSDB_PASSWD, "getpwnam_r", defaultsrc,
 570             name, pwd, buffer, bufsize, &ret_errno);
 571         if (rv == NS_SUCCESS)
 572                 return (0);
 573         else
 574                 return (ret_errno);
 575 }
 576
 577
 578 int
 579 getpwuid_r(uid_t uid, struct passwd *pwd, char *buffer, size_t bufsize,
 580     struct passwd **result)
 581 {
 582 #ifdef NS_CACHING
 583         static const nss_cache_info cache_info =
 584                 NS_COMMON_CACHE_INFO_INITIALIZER(
 585                 passwd, (void *)nss_lt_id,
 586                 pwd_id_func, pwd_marshal_func, pwd_unmarshal_func);
 587 #endif
 588
 589         static const ns_dtab dtab[] = {
 590                 { NSSRC_FILES, files_passwd, (void *)nss_lt_id },
 591 #ifdef HESIOD
 592                 { NSSRC_DNS, dns_passwd, (void *)nss_lt_id },
 593 #endif
 594 #ifdef YP
 595                 { NSSRC_NIS, nis_passwd, (void *)nss_lt_id },
 596 #endif
 597                 { NSSRC_COMPAT, compat_passwd, (void *)nss_lt_id },
 598 #ifdef NS_CACHING
 599                 NS_CACHE_CB(&cache_info)
 600 #endif
 601                 { NULL, NULL, NULL }
 602         };
 603         int     rv, ret_errno;
 604
 605         pwd_init(pwd);
 606         ret_errno = 0;
 607         *result = NULL;
 608         rv = _nsdispatch(result, dtab, NSDB_PASSWD, "getpwuid_r", defaultsrc,
 609             uid, pwd, buffer, bufsize, &ret_errno);
 610         if (rv == NS_SUCCESS)
 611                 return (0);
 612         else
 613                 return (ret_errno);
 614 }
 615
 616
 617 static void
 618 pwd_init(struct passwd *pwd)
 619 {
 620         static char nul[] = "";
 621
 622         memset(pwd, 0, sizeof(*pwd));
 623         pwd->pw_uid = (uid_t)-1;  /* Considered least likely to lead to */
 624         pwd->pw_gid = (gid_t)-1;  /* a security issue.                  */
 625         pwd->pw_name = nul;
 626         pwd->pw_passwd = nul;
 627         pwd->pw_class = nul;
 628         pwd->pw_gecos = nul;
 629         pwd->pw_dir = nul;
 630         pwd->pw_shell = nul;
 631 }
 632
 633
 634 static struct passwd     pwd;
 635 static char             *pwd_storage;
 636 static size_t            pwd_storage_size;
 637
 638
 639 static struct passwd *
 640 getpw(int (*fn)(union key, struct passwd *, char *, size_t, struct passwd **),
 641     union key key)
 642 {
 643         int              rv;
 644         struct passwd   *res;
 645
 646         if (pwd_storage == NULL) {
 647                 pwd_storage = malloc(PWD_STORAGE_INITIAL);
 648                 if (pwd_storage == NULL)
 649                         return (NULL);
 650                 pwd_storage_size = PWD_STORAGE_INITIAL;
 651         }
 652         do {
 653                 rv = fn(key, &pwd, pwd_storage, pwd_storage_size, &res);
 654                 if (res == NULL && rv == ERANGE) {
 655                         free(pwd_storage);
 656                         if ((pwd_storage_size << 1) > PWD_STORAGE_MAX) {
 657                                 pwd_storage = NULL;
 658                                 errno = ERANGE;
 659                                 return (NULL);
 660                         }
 661                         pwd_storage_size <<= 1;
 662                         pwd_storage = malloc(pwd_storage_size);
 663                         if (pwd_storage == NULL)
 664                                 return (NULL);
 665                 }
 666         } while (res == NULL && rv == ERANGE);
 667         if (rv != 0)
 668                 errno = rv;
 669         return (res);
 670 }
 671
 672
 673 static int
 674 wrap_getpwnam_r(union key key, struct passwd *pwd, char *buffer,
 675     size_t bufsize, struct passwd **res)
 676 {
 677         return (getpwnam_r(key.name, pwd, buffer, bufsize, res));
 678 }
 679
 680
 681 static int
 682 wrap_getpwuid_r(union key key, struct passwd *pwd, char *buffer,
 683     size_t bufsize, struct passwd **res)
 684 {
 685         return (getpwuid_r(key.uid, pwd, buffer, bufsize, res));
 686 }
 687
 688
 689 static int
 690 wrap_getpwent_r(union key key __unused, struct passwd *pwd, char *buffer,
 691     size_t bufsize, struct passwd **res)
 692 {
 693         return (getpwent_r(pwd, buffer, bufsize, res));
 694 }
 695
 696
 697 struct passwd *
 698 getpwnam(const char *name)
 699 {
 700         union key key;
 701
 702         key.name = name;
 703         return (getpw(wrap_getpwnam_r, key));
 704 }
 705
 706
 707 struct passwd *
 708 getpwuid(uid_t uid)
 709 {
 710         union key key;
 711
 712         key.uid = uid;
 713         return (getpw(wrap_getpwuid_r, key));
 714 }
 715
 716
 717 struct passwd *
 718 getpwent(void)
 719 {
 720         union key key;
 721
 722         key.uid = 0; /* not used */
 723         return (getpw(wrap_getpwent_r, key));
 724 }
 725
 726
 727 /*
 728  * files backend
 729  */
 730 static DB *
 731 pwdbopen(int *version)
 732 {
 733         DB      *res;
 734         DBT      key, entry;
 735         int      rv;
 736
 737         if (geteuid() != 0 ||
 738             (res = dbopen(_PATH_SMP_DB, O_RDONLY, 0, DB_HASH, NULL)) == NULL)
 739                 res = dbopen(_PATH_MP_DB, O_RDONLY, 0, DB_HASH, NULL);
 740         if (res == NULL)
 741                 return (NULL);
 742         key.data = _PWD_VERSION_KEY;
 743         key.size = strlen(_PWD_VERSION_KEY);
 744         rv = res->get(res, &key, &entry, 0);
 745         if (rv == 0)
 746                 *version = *(unsigned char *)entry.data;
 747         else
 748                 *version = 3;
 749         if (*version < 3 ||
 750             *version >= sizeof(pwdb_versions)/sizeof(pwdb_versions[0])) {
 751                 syslog(LOG_CRIT, "Unsupported password database version %d",
 752                     *version);
 753                 res->close(res);
 754                 res = NULL;
 755         }
 756         return (res);
 757 }
 758
 759
 760 static void
 761 files_endstate(void *p)
 762 {
 763         DB      *db;
 764
 765         if (p == NULL)
 766                 return;
 767         db = ((struct files_state *)p)->db;
 768         if (db != NULL)
 769                 db->close(db);
 770         free(p);
 771 }
 772
 773
 774 static int
 775 files_setpwent(void *retval, void *mdata, va_list ap)
 776 {
 777         struct files_state      *st;
 778         int                      rv, stayopen;
 779
 780         rv = files_getstate(&st);
 781         if (rv != 0)
 782                 return (NS_UNAVAIL);
 783         switch ((enum constants)mdata) {
 784         case SETPWENT:
 785                 stayopen = va_arg(ap, int);
 786                 st->keynum = 0;
 787                 if (stayopen)
 788                         st->db = pwdbopen(&st->version);
 789                 st->stayopen = stayopen;
 790                 break;
 791         case ENDPWENT:
 792                 if (st->db != NULL) {
 793                         st->db->close(st->db);
 794                         st->db = NULL;
 795                 }
 796                 break;
 797         default:
 798                 break;
 799         }
 800         return (NS_UNAVAIL);
 801 }
 802
 803
 804 static int
 805 files_passwd(void *retval, void *mdata, va_list ap)
 806 {
 807         char                     keybuf[MAXLOGNAME + 1];
 808         DBT                      key, entry;
 809         struct files_state      *st;
 810         enum nss_lookup_type     how;
 811         const char              *name;
 812         struct passwd           *pwd;
 813         char                    *buffer;
 814         size_t                   bufsize, namesize;
 815         uid_t                    uid;
 816         uint32_t                 store;
 817         int                      rv, stayopen, *errnop;
 818
 819         name = NULL;
 820         uid = (uid_t)-1;
 821         how = (enum nss_lookup_type)mdata;
 822         switch (how) {
 823         case nss_lt_name:
 824                 name = va_arg(ap, const char *);
 825                 keybuf[0] = _PW_KEYBYNAME;
 826                 break;
 827         case nss_lt_id:
 828                 uid = va_arg(ap, uid_t);
 829                 keybuf[0] = _PW_KEYBYUID;
 830                 break;
 831         case nss_lt_all:
 832                 keybuf[0] = _PW_KEYBYNUM;
 833                 break;
 834         default:
 835                 rv = NS_NOTFOUND;
 836                 goto fin;
 837         }
 838         pwd = va_arg(ap, struct passwd *);
 839         buffer = va_arg(ap, char *);
 840         bufsize = va_arg(ap, size_t);
 841         errnop = va_arg(ap, int *);
 842         *errnop = files_getstate(&st);
 843         if (*errnop != 0)
 844                 return (NS_UNAVAIL);
 845         if (how == nss_lt_all && st->keynum < 0) {
 846                 rv = NS_NOTFOUND;
 847                 goto fin;
 848         }
 849         if (st->db == NULL &&
 850             (st->db = pwdbopen(&st->version)) == NULL) {
 851                 *errnop = errno;
 852                 rv = NS_UNAVAIL;
 853                 goto fin;
 854         }
 855         if (how == nss_lt_all)
 856                 stayopen = 1;
 857         else
 858                 stayopen = st->stayopen;
 859         key.data = keybuf;
 860         do {
 861                 switch (how) {
 862                 case nss_lt_name:
 863                         /* MAXLOGNAME includes NUL byte, but we do not
 864                          * include the NUL byte in the key.
 865                          */
 866                         namesize = strlcpy(&keybuf[1], name, sizeof(keybuf)-1);
 867                         if (namesize >= sizeof(keybuf)-1) {
 868                                 *errnop = EINVAL;
 869                                 rv = NS_NOTFOUND;
 870                                 goto fin;
 871                         }
 872                         key.size = namesize + 1;
 873                         break;
 874                 case nss_lt_id:
 875                         if (st->version < _PWD_CURRENT_VERSION) {
 876                                 memcpy(&keybuf[1], &uid, sizeof(uid));
 877                                 key.size = sizeof(uid) + 1;
 878                         } else {
 879                                 store = htonl(uid);
 880                                 memcpy(&keybuf[1], &store, sizeof(store));
 881                                 key.size = sizeof(store) + 1;
 882                         }
 883                         break;
 884                 case nss_lt_all:
 885                         st->keynum++;
 886                         if (st->version < _PWD_CURRENT_VERSION) {
 887                                 memcpy(&keybuf[1], &st->keynum,
 888                                     sizeof(st->keynum));
 889                                 key.size = sizeof(st->keynum) + 1;
 890                         } else {
 891                                 store = htonl(st->keynum);
 892                                 memcpy(&keybuf[1], &store, sizeof(store));
 893                                 key.size = sizeof(store) + 1;
 894                         }
 895                         break;
 896                 }
 897                 keybuf[0] = _PW_VERSIONED(keybuf[0], st->version);
 898                 rv = st->db->get(st->db, &key, &entry, 0);
 899                 if (rv < 0 || rv > 1) { /* should never return > 1 */
 900                         *errnop = errno;
 901                         rv = NS_UNAVAIL;
 902                         goto fin;
 903                 } else if (rv == 1) {
 904                         if (how == nss_lt_all)
 905                                 st->keynum = -1;
 906                         rv = NS_NOTFOUND;
 907                         goto fin;
 908                 }
 909                 rv = pwdb_versions[st->version].match(entry.data, entry.size,
 910                     how, name, uid);
 911                 if (rv != NS_SUCCESS)
 912                         continue;
 913                 if (entry.size > bufsize) {
 914                         *errnop = ERANGE;
 915                         rv = NS_RETURN;
 916                         break;
 917                 }
 918                 memcpy(buffer, entry.data, entry.size);
 919                 rv = pwdb_versions[st->version].parse(buffer, entry.size, pwd,
 920                     errnop);
 921         } while (how == nss_lt_all && !(rv & NS_TERMINATE));
 922 fin:
 923         if (!stayopen && st->db != NULL) {
 924                 st->db->close(st->db);
 925                 st->db = NULL;
 926         }
 927         if (rv == NS_SUCCESS) {
 928                 pwd->pw_fields &= ~_PWF_SOURCE;
 929                 pwd->pw_fields |= _PWF_FILES;
 930                 if (retval != NULL)
 931                         *(struct passwd **)retval = pwd;
 932         }
 933         return (rv);
 934 }
 935
 936
 937 static int
 938 pwdb_match_entry_v3(char *entry, size_t entrysize, enum nss_lookup_type how,
 939     const char *name, uid_t uid)
 940 {
 941         const char      *p, *eom;
 942         uid_t            uid2;
 943
 944         eom = &entry[entrysize];
 945         for (p = entry; p < eom; p++)
 946                 if (*p == '\0')
 947                         break;
 948         if (*p != '\0')
 949                 return (NS_NOTFOUND);
 950         if (how == nss_lt_all)
 951                 return (NS_SUCCESS);
 952         if (how == nss_lt_name)
 953                 return (strcmp(name, entry) == 0 ? NS_SUCCESS : NS_NOTFOUND);
 954         for (p++; p < eom; p++)
 955                 if (*p == '\0')
 956                         break;
 957         if (*p != '\0' || (++p) + sizeof(uid) >= eom)
 958                 return (NS_NOTFOUND);
 959         memcpy(&uid2, p, sizeof(uid2));
 960         return (uid == uid2 ? NS_SUCCESS : NS_NOTFOUND);
 961 }
 962
 963
 964 static int
 965 pwdb_parse_entry_v3(char *buffer, size_t bufsize, struct passwd *pwd,
 966     int *errnop)
 967 {
 968         char            *p, *eom;
 969         int32_t          pw_change, pw_expire;
 970
 971         /* THIS CODE MUST MATCH THAT IN pwd_mkdb. */
 972         p = buffer;
 973         eom = &buffer[bufsize];
 974 #define STRING(field)   do {                    \
 975                 (field) = p;                    \
 976                 while (p < eom && *p != '\0')   \
 977                         p++;                    \
 978                 if (p >= eom)                   \
 979                         return (NS_NOTFOUND);   \
 980                 p++;                            \
 981         } while (0)
 982 #define SCALAR(field)   do {                            \
 983                 if (p + sizeof(field) > eom)            \
 984                         return (NS_NOTFOUND);           \
 985                 memcpy(&(field), p, sizeof(field));     \
 986                 p += sizeof(field);                     \
 987         } while (0)
 988         STRING(pwd->pw_name);
 989         STRING(pwd->pw_passwd);
 990         SCALAR(pwd->pw_uid);
 991         SCALAR(pwd->pw_gid);
 992         SCALAR(pw_change);
 993         STRING(pwd->pw_class);
 994         STRING(pwd->pw_gecos);
 995         STRING(pwd->pw_dir);
 996         STRING(pwd->pw_shell);
 997         SCALAR(pw_expire);
 998         SCALAR(pwd->pw_fields);
 999 #undef STRING
1000 #undef SCALAR
1001         pwd->pw_change = pw_change;
1002         pwd->pw_expire = pw_expire;
1003         return (NS_SUCCESS);
1004 }
1005
1006
1007 static int
1008 pwdb_match_entry_v4(char *entry, size_t entrysize, enum nss_lookup_type how,
1009     const char *name, uid_t uid)
1010 {
1011         const char      *p, *eom;
1012         uint32_t         uid2;
1013
1014         eom = &entry[entrysize];
1015         for (p = entry; p < eom; p++)
1016                 if (*p == '\0')
1017                         break;
1018         if (*p != '\0')
1019                 return (NS_NOTFOUND);
1020         if (how == nss_lt_all)
1021                 return (NS_SUCCESS);
1022         if (how == nss_lt_name)
1023                 return (strcmp(name, entry) == 0 ? NS_SUCCESS : NS_NOTFOUND);
1024         for (p++; p < eom; p++)
1025                 if (*p == '\0')
1026                         break;
1027         if (*p != '\0' || (++p) + sizeof(uid) >= eom)
1028                 return (NS_NOTFOUND);
1029         memcpy(&uid2, p, sizeof(uid2));
1030         uid2 = ntohl(uid2);
1031         return (uid == (uid_t)uid2 ? NS_SUCCESS : NS_NOTFOUND);
1032 }
1033
1034
1035 static int
1036 pwdb_parse_entry_v4(char *buffer, size_t bufsize, struct passwd *pwd,
1037     int *errnop)
1038 {
1039         char            *p, *eom;
1040         uint32_t         n;
1041
1042         /* THIS CODE MUST MATCH THAT IN pwd_mkdb. */
1043         p = buffer;
1044         eom = &buffer[bufsize];
1045 #define STRING(field)   do {                    \
1046                 (field) = p;                    \
1047                 while (p < eom && *p != '\0')   \
1048                         p++;                    \
1049                 if (p >= eom)                   \
1050                         return (NS_NOTFOUND);   \
1051                 p++;                            \
1052         } while (0)
1053 #define SCALAR(field)   do {                            \
1054                 if (p + sizeof(n) > eom)                \
1055                         return (NS_NOTFOUND);           \
1056                 memcpy(&n, p, sizeof(n));               \
1057                 (field) = ntohl(n);                     \
1058                 p += sizeof(n);                         \
1059         } while (0)
1060         STRING(pwd->pw_name);
1061         STRING(pwd->pw_passwd);
1062         SCALAR(pwd->pw_uid);
1063         SCALAR(pwd->pw_gid);
1064         SCALAR(pwd->pw_change);
1065         STRING(pwd->pw_class);
1066         STRING(pwd->pw_gecos);
1067         STRING(pwd->pw_dir);
1068         STRING(pwd->pw_shell);
1069         SCALAR(pwd->pw_expire);
1070         SCALAR(pwd->pw_fields);
1071 #undef STRING
1072 #undef SCALAR
1073         return (NS_SUCCESS);
1074 }
1075
1076
1077 #ifdef HESIOD
1078 /*
1079  * dns backend
1080  */
1081 static void
1082 dns_endstate(void *p)
1083 {
1084         free(p);
1085 }
1086
1087
1088 static int
1089 dns_setpwent(void *retval, void *mdata, va_list ap)
1090 {
1091         struct dns_state        *st;
1092         int                      rv;
1093
1094         rv = dns_getstate(&st);
1095         if (rv != 0)
1096                 return (NS_UNAVAIL);
1097         st->counter = 0;
1098         return (NS_UNAVAIL);
1099 }
1100
1101
1102 static int
1103 dns_passwd(void *retval, void *mdata, va_list ap)
1104 {
1105         char                     buf[HESIOD_NAME_MAX];
1106         struct dns_state        *st;
1107         struct passwd           *pwd;
1108         const char              *name, *label;
1109         void                    *ctx;
1110         char                    *buffer, **hes;
1111         size_t                   bufsize, linesize;
1112         uid_t                    uid;
1113         enum nss_lookup_type     how;
1114         int                      rv, *errnop;
1115
1116         ctx = NULL;
1117         hes = NULL;
1118         name = NULL;
1119         uid = (uid_t)-1;
1120         how = (enum nss_lookup_type)mdata;
1121         switch (how) {
1122         case nss_lt_name:
1123                 name = va_arg(ap, const char *);
1124                 break;
1125         case nss_lt_id:
1126                 uid = va_arg(ap, uid_t);
1127                 break;
1128         case nss_lt_all:
1129                 break;
1130         }
1131         pwd     = va_arg(ap, struct passwd *);
1132         buffer  = va_arg(ap, char *);
1133         bufsize = va_arg(ap, size_t);
1134         errnop  = va_arg(ap, int *);
1135         *errnop = dns_getstate(&st);
1136         if (*errnop != 0)
1137                 return (NS_UNAVAIL);
1138         if (hesiod_init(&ctx) != 0) {
1139                 *errnop = errno;
1140                 rv = NS_UNAVAIL;
1141                 goto fin;
1142         }
1143         do {
1144                 rv = NS_NOTFOUND;
1145                 switch (how) {
1146                 case nss_lt_name:
1147                         label = name;
1148                         break;
1149                 case nss_lt_id:
1150                         if (snprintf(buf, sizeof(buf), "%lu",
1151                             (unsigned long)uid) >= sizeof(buf))
1152                                 goto fin;
1153                         label = buf;
1154                         break;
1155                 case nss_lt_all:
1156                         if (st->counter < 0)
1157                                 goto fin;
1158                         if (snprintf(buf, sizeof(buf), "passwd-%ld",
1159                             st->counter++) >= sizeof(buf))
1160                                 goto fin;
1161                         label = buf;
1162                         break;
1163                 }
1164                 hes = hesiod_resolve(ctx, label,
1165                     how == nss_lt_id ? "uid" : "passwd");
1166                 if (hes == NULL) {
1167                         if (how == nss_lt_all)
1168                                 st->counter = -1;
1169                         if (errno != ENOENT)
1170                                 *errnop = errno;
1171                         goto fin;
1172                 }
1173                 rv = __pw_match_entry(hes[0], strlen(hes[0]), how, name, uid);
1174                 if (rv != NS_SUCCESS) {
1175                         hesiod_free_list(ctx, hes);
1176                         hes = NULL;
1177                         continue;
1178                 }
1179                 linesize = strlcpy(buffer, hes[0], bufsize);
1180                 if (linesize >= bufsize) {
1181                         *errnop = ERANGE;
1182                         rv = NS_RETURN;
1183                         continue;
1184                 }
1185                 hesiod_free_list(ctx, hes);
1186                 hes = NULL;
1187                 rv = __pw_parse_entry(buffer, bufsize, pwd, 0, errnop);
1188         } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1189 fin:
1190         if (hes != NULL)
1191                 hesiod_free_list(ctx, hes);
1192         if (ctx != NULL)
1193                 hesiod_end(ctx);
1194         if (rv == NS_SUCCESS) {
1195                 pwd->pw_fields &= ~_PWF_SOURCE;
1196                 pwd->pw_fields |= _PWF_HESIOD;
1197                 if (retval != NULL)
1198                         *(struct passwd **)retval = pwd;
1199         }
1200         return (rv);
1201 }
1202 #endif /* HESIOD */
1203
1204
1205 #ifdef YP
1206 /*
1207  * nis backend
1208  */
1209 static void
1210 nis_endstate(void *p)
1211 {
1212         free(((struct nis_state *)p)->key);
1213         free(p);
1214 }
1215
1216 /*
1217  * Test for the presence of special FreeBSD-specific master.passwd.by*
1218  * maps. We do this using yp_order(). If it fails, then either the server
1219  * doesn't have the map, or the YPPROC_ORDER procedure isn't supported by
1220  * the server (Sun NIS+ servers in YP compat mode behave this way). If
1221  * the master.passwd.by* maps don't exist, then let the lookup routine try
1222  * the regular passwd.by* maps instead. If the lookup routine fails, it
1223  * can return an error as needed.
1224  */
1225 static int
1226 nis_map(char *domain, enum nss_lookup_type how, char *buffer, size_t bufsize,
1227     int *master)
1228 {
1229         int     rv, order;
1230
1231         *master = 0;
1232         if (geteuid() == 0) {
1233                 if (snprintf(buffer, bufsize, "master.passwd.by%s",
1234                     (how == nss_lt_id) ? "uid" : "name") >= bufsize)
1235                         return (NS_UNAVAIL);
1236                 rv = yp_order(domain, buffer, &order);
1237                 if (rv == 0) {
1238                         *master = 1;
1239                         return (NS_SUCCESS);
1240                 }
1241         }
1242
1243         if (snprintf(buffer, bufsize, "passwd.by%s",
1244             (how == nss_lt_id) ? "uid" : "name") >= bufsize)
1245                 return (NS_UNAVAIL);
1246
1247         return (NS_SUCCESS);
1248 }
1249
1250
1251 static int
1252 nis_adjunct(char *domain, const char *name, char *buffer, size_t bufsize)
1253 {
1254         int      rv;
1255         char    *result, *p, *q, *eor;
1256         int      resultlen;
1257
1258         result = NULL;
1259         rv = yp_match(domain, "passwd.adjunct.byname", name, strlen(name),
1260             &result, &resultlen);
1261         if (rv != 0)
1262                 rv = 1;
1263         else {
1264                 eor = &result[resultlen];
1265                 p = memchr(result, ':', eor - result);
1266                 if (p != NULL && ++p < eor &&
1267                     (q = memchr(p, ':', eor - p)) != NULL) {
1268                         if (q - p >= bufsize)
1269                                 rv = -1;
1270                         else {
1271                                 memcpy(buffer, p, q - p);
1272                                 buffer[q - p] ='\0';
1273                         }
1274                 } else
1275                         rv = 1;
1276         }
1277         free(result);
1278         return (rv);
1279 }
1280
1281
1282 static int
1283 nis_setpwent(void *retval, void *mdata, va_list ap)
1284 {
1285         struct nis_state        *st;
1286         int                      rv;
1287
1288         rv = nis_getstate(&st);
1289         if (rv != 0)
1290                 return (NS_UNAVAIL);
1291         st->done = 0;
1292         free(st->key);
1293         st->key = NULL;
1294         return (NS_UNAVAIL);
1295 }
1296
1297
1298 static int
1299 nis_passwd(void *retval, void *mdata, va_list ap)
1300 {
1301         char             map[YPMAXMAP];
1302         struct nis_state *st;
1303         struct passwd   *pwd;
1304         const char      *name;
1305         char            *buffer, *key, *result;
1306         size_t           bufsize;
1307         uid_t            uid;
1308         enum nss_lookup_type how;
1309         int             *errnop, keylen, resultlen, rv, master;
1310
1311         name = NULL;
1312         uid = (uid_t)-1;
1313         how = (enum nss_lookup_type)mdata;
1314         switch (how) {
1315         case nss_lt_name:
1316                 name = va_arg(ap, const char *);
1317                 break;
1318         case nss_lt_id:
1319                 uid = va_arg(ap, uid_t);
1320                 break;
1321         case nss_lt_all:
1322                 break;
1323         }
1324         pwd     = va_arg(ap, struct passwd *);
1325         buffer  = va_arg(ap, char *);
1326         bufsize = va_arg(ap, size_t);
1327         errnop  = va_arg(ap, int *);
1328         *errnop = nis_getstate(&st);
1329         if (*errnop != 0)
1330                 return (NS_UNAVAIL);
1331         if (st->domain[0] == '\0') {
1332                 if (getdomainname(st->domain, sizeof(st->domain)) != 0) {
1333                         *errnop = errno;
1334                         return (NS_UNAVAIL);
1335                 }
1336         }
1337         rv = nis_map(st->domain, how, map, sizeof(map), &master);
1338         if (rv != NS_SUCCESS)
1339                 return (rv);
1340         result = NULL;
1341         do {
1342                 rv = NS_NOTFOUND;
1343                 switch (how) {
1344                 case nss_lt_name:
1345                         if (strlcpy(buffer, name, bufsize) >= bufsize)
1346                                 goto erange;
1347                         break;
1348                 case nss_lt_id:
1349                         if (snprintf(buffer, bufsize, "%lu",
1350                             (unsigned long)uid) >= bufsize)
1351                                 goto erange;
1352                         break;
1353                 case nss_lt_all:
1354                         if (st->done)
1355                                 goto fin;
1356                         break;
1357                 }
1358                 result = NULL;
1359                 if (how == nss_lt_all) {
1360                         if (st->key == NULL)
1361                                 rv = yp_first(st->domain, map, &st->key,
1362                                     &st->keylen, &result, &resultlen);
1363                         else {
1364                                 key = st->key;
1365                                 keylen = st->keylen;
1366                                 st->key = NULL;
1367                                 rv = yp_next(st->domain, map, key, keylen,
1368                                     &st->key, &st->keylen, &result,
1369                                     &resultlen);
1370                                 free(key);
1371                         }
1372                         if (rv != 0) {
1373                                 free(result);
1374                                 free(st->key);
1375                                 st->key = NULL;
1376                                 if (rv == YPERR_NOMORE)
1377                                         st->done = 1;
1378                                 else
1379                                         rv = NS_UNAVAIL;
1380                                 goto fin;
1381                         }
1382                 } else {
1383                         rv = yp_match(st->domain, map, buffer, strlen(buffer),
1384                             &result, &resultlen);
1385                         if (rv == YPERR_KEY) {
1386                                 rv = NS_NOTFOUND;
1387                                 continue;
1388                         } else if (rv != 0) {
1389                                 free(result);
1390                                 rv = NS_UNAVAIL;
1391                                 continue;
1392                         }
1393                 }
1394                 if (resultlen >= bufsize)
1395                         goto erange;
1396                 memcpy(buffer, result, resultlen);
1397                 buffer[resultlen] = '\0';
1398                 free(result);
1399                 rv = __pw_match_entry(buffer, resultlen, how, name, uid);
1400                 if (rv == NS_SUCCESS)
1401                         rv = __pw_parse_entry(buffer, resultlen, pwd, master,
1402                             errnop);
1403         } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1404 fin:
1405         if (rv == NS_SUCCESS) {
1406                 if (strstr(pwd->pw_passwd, "##") != NULL) {
1407                         rv = nis_adjunct(st->domain, pwd->pw_name,
1408                             &buffer[resultlen+1], bufsize-resultlen-1);
1409                         if (rv < 0)
1410                                 goto erange;
1411                         else if (rv == 0)
1412                                 pwd->pw_passwd = &buffer[resultlen+1];
1413                 }
1414                 pwd->pw_fields &= ~_PWF_SOURCE;
1415                 pwd->pw_fields |= _PWF_NIS;
1416                 if (retval != NULL)
1417                         *(struct passwd **)retval = pwd;
1418                 rv = NS_SUCCESS;
1419         }
1420         return (rv);
1421 erange:
1422         *errnop = ERANGE;
1423         return (NS_RETURN);
1424 }
1425 #endif /* YP */
1426
1427
1428 /*
1429  * compat backend
1430  */
1431 static void
1432 compat_clear_template(struct passwd *template)
1433 {
1434
1435         free(template->pw_passwd);
1436         free(template->pw_gecos);
1437         free(template->pw_dir);
1438         free(template->pw_shell);
1439         memset(template, 0, sizeof(*template));
1440 }
1441
1442
1443 static int
1444 compat_set_template(struct passwd *src, struct passwd *template)
1445 {
1446
1447         compat_clear_template(template);
1448 #ifdef PW_OVERRIDE_PASSWD
1449         if ((src->pw_fields & _PWF_PASSWD) &&
1450             (template->pw_passwd = strdup(src->pw_passwd)) == NULL)
1451                 goto enomem;
1452 #endif
1453         if (src->pw_fields & _PWF_UID)
1454                 template->pw_uid = src->pw_uid;
1455         if (src->pw_fields & _PWF_GID)
1456                 template->pw_gid = src->pw_gid;
1457         if ((src->pw_fields & _PWF_GECOS) &&
1458             (template->pw_gecos = strdup(src->pw_gecos)) == NULL)
1459                 goto enomem;
1460         if ((src->pw_fields & _PWF_DIR) &&
1461             (template->pw_dir = strdup(src->pw_dir)) == NULL)
1462                 goto enomem;
1463         if ((src->pw_fields & _PWF_SHELL) &&
1464             (template->pw_shell = strdup(src->pw_shell)) == NULL)
1465                 goto enomem;
1466         template->pw_fields = src->pw_fields;
1467         return (0);
1468 enomem:
1469         syslog(LOG_ERR, "getpwent memory allocation failure");
1470         return (-1);
1471 }
1472
1473
1474 static int
1475 compat_use_template(struct passwd *pwd, struct passwd *template, char *buffer,
1476     size_t bufsize)
1477 {
1478         struct passwd hold;
1479         char    *copy, *p, *q, *eob;
1480         size_t   n;
1481
1482         /* We cannot know the layout of the password fields in `buffer',
1483          * so we have to copy everything.
1484          */
1485         if (template->pw_fields == 0) /* nothing to fill-in */
1486                 return (0);
1487         n = 0;
1488         n += pwd->pw_name != NULL ? strlen(pwd->pw_name) + 1 : 0;
1489         n += pwd->pw_passwd != NULL ? strlen(pwd->pw_passwd) + 1 : 0;
1490         n += pwd->pw_class != NULL ? strlen(pwd->pw_class) + 1 : 0;
1491         n += pwd->pw_gecos != NULL ? strlen(pwd->pw_gecos) + 1 : 0;
1492         n += pwd->pw_dir != NULL ? strlen(pwd->pw_dir) + 1 : 0;
1493         n += pwd->pw_shell != NULL ? strlen(pwd->pw_shell) + 1 : 0;
1494         copy = malloc(n);
1495         if (copy == NULL) {
1496                 syslog(LOG_ERR, "getpwent memory allocation failure");
1497                 return (ENOMEM);
1498         }
1499         p = copy;
1500         eob = &copy[n];
1501 #define COPY(field) do {                                \
1502         if (pwd->field == NULL)                         \
1503                 hold.field = NULL;                      \
1504         else {                                          \
1505                 hold.field = p;                         \
1506                 p += strlcpy(p, pwd->field, eob-p) + 1; \
1507         }                                               \
1508 } while (0)
1509         COPY(pw_name);
1510         COPY(pw_passwd);
1511         COPY(pw_class);
1512         COPY(pw_gecos);
1513         COPY(pw_dir);
1514         COPY(pw_shell);
1515 #undef COPY
1516         p = buffer;
1517         eob = &buffer[bufsize];
1518 #define COPY(field, flag) do {                                           \
1519         q = (template->pw_fields & flag) ? template->field : hold.field; \
1520         if (q == NULL)                                                   \
1521                 pwd->field = NULL;                                       \
1522         else {                                                           \
1523                 pwd->field = p;                                          \
1524                 if ((n = strlcpy(p, q, eob-p)) >= eob-p) {               \
1525                         free(copy);                                      \
1526                         return (ERANGE);                                 \
1527                 }                                                        \
1528                 p += n + 1;                                              \
1529         }                                                                \
1530 } while (0)
1531         COPY(pw_name, 0);
1532 #ifdef PW_OVERRIDE_PASSWD
1533         COPY(pw_passwd, _PWF_PASSWD);
1534 #else
1535         COPY(pw_passwd, 0);
1536 #endif
1537         COPY(pw_class, 0);
1538         COPY(pw_gecos, _PWF_GECOS);
1539         COPY(pw_dir, _PWF_DIR);
1540         COPY(pw_shell, _PWF_SHELL);
1541 #undef COPY
1542 #define COPY(field, flag) do {                  \
1543         if (template->pw_fields & flag)         \
1544                 pwd->field = template->field;   \
1545 } while (0)
1546         COPY(pw_uid, _PWF_UID);
1547         COPY(pw_gid, _PWF_GID);
1548 #undef COPY
1549         free(copy);
1550         return (0);
1551 }
1552
1553
1554 static int
1555 compat_exclude(const char *name, DB **db)
1556 {
1557         DBT     key, data;
1558
1559         if (*db == NULL &&
1560             (*db = dbopen(NULL, O_RDWR, 600, DB_HASH, 0)) == NULL)
1561                 return (errno);
1562         key.size = strlen(name);
1563         key.data = (char *)name;
1564         data.size = 0;
1565         data.data = NULL;
1566
1567         if ((*db)->put(*db, &key, &data, 0) == -1)
1568                 return (errno);
1569         return (0);
1570 }
1571
1572
1573 static int
1574 compat_is_excluded(const char *name, DB *db)
1575 {
1576         DBT     key, data;
1577
1578         if (db == NULL)
1579                 return (0);
1580         key.size = strlen(name);
1581         key.data = (char *)name;
1582         return (db->get(db, &key, &data, 0) == 0);
1583 }
1584
1585
1586 static int
1587 compat_redispatch(struct compat_state *st, enum nss_lookup_type how,
1588     enum nss_lookup_type lookup_how, const char *name, const char *lookup_name,
1589     uid_t uid, struct passwd *pwd, char *buffer, size_t bufsize, int *errnop)
1590 {
1591         static const ns_src compatsrc[] = {
1592 #ifdef YP
1593                 { NSSRC_NIS, NS_SUCCESS },
1594 #endif
1595                 { NULL, 0 }
1596         };
1597         ns_dtab dtab[] = {
1598 #ifdef YP
1599                 { NSSRC_NIS, nis_passwd, NULL },
1600 #endif
1601 #ifdef HESIOD
1602                 { NSSRC_DNS, dns_passwd, NULL },
1603 #endif
1604                 { NULL, NULL, NULL }
1605         };
1606         void            *discard;
1607         int              rv, e, i;
1608
1609         for (i = 0; i < sizeof(dtab)/sizeof(dtab[0]) - 1; i++)
1610                 dtab[i].mdata = (void *)lookup_how;
1611 more:
1612         pwd_init(pwd);
1613         switch (lookup_how) {
1614         case nss_lt_all:
1615                 rv = _nsdispatch(&discard, dtab, NSDB_PASSWD_COMPAT,
1616                     "getpwent_r", compatsrc, pwd, buffer, bufsize,
1617                     errnop);
1618                 break;
1619         case nss_lt_id:
1620                 rv = _nsdispatch(&discard, dtab, NSDB_PASSWD_COMPAT,
1621                     "getpwuid_r", compatsrc, uid, pwd, buffer,
1622                     bufsize, errnop);
1623                 break;
1624         case nss_lt_name:
1625                 rv = _nsdispatch(&discard, dtab, NSDB_PASSWD_COMPAT,
1626                     "getpwnam_r", compatsrc, lookup_name, pwd, buffer,
1627                     bufsize, errnop);
1628                 break;
1629         default:
1630                 return (NS_UNAVAIL);
1631         }
1632         if (rv != NS_SUCCESS)
1633                 return (rv);
1634         if (compat_is_excluded(pwd->pw_name, st->exclude)) {
1635                 if (how == nss_lt_all)
1636                         goto more;
1637                 return (NS_NOTFOUND);
1638         }
1639         e = compat_use_template(pwd, &st->template, buffer, bufsize);
1640         if (e != 0) {
1641                 *errnop = e;
1642                 if (e == ERANGE)
1643                         return (NS_RETURN);
1644                 else
1645                         return (NS_UNAVAIL);
1646         }
1647         switch (how) {
1648         case nss_lt_name:
1649                 if (strcmp(name, pwd->pw_name) != 0)
1650                         return (NS_NOTFOUND);
1651                 break;
1652         case nss_lt_id:
1653                 if (uid != pwd->pw_uid)
1654                         return (NS_NOTFOUND);
1655                 break;
1656         default:
1657                 break;
1658         }
1659         return (NS_SUCCESS);
1660 }
1661
1662
1663 static void
1664 compat_endstate(void *p)
1665 {
1666         struct compat_state *st;
1667
1668         if (p == NULL)
1669                 return;
1670         st = (struct compat_state *)p;
1671         if (st->db != NULL)
1672                 st->db->close(st->db);
1673         if (st->exclude != NULL)
1674                 st->exclude->close(st->exclude);
1675         compat_clear_template(&st->template);
1676         free(p);
1677 }
1678
1679
1680 static int
1681 compat_setpwent(void *retval, void *mdata, va_list ap)
1682 {
1683         static const ns_src compatsrc[] = {
1684 #ifdef YP
1685                 { NSSRC_NIS, NS_SUCCESS },
1686 #endif
1687                 { NULL, 0 }
1688         };
1689         ns_dtab dtab[] = {
1690 #ifdef YP
1691                 { NSSRC_NIS, nis_setpwent, NULL },
1692 #endif
1693 #ifdef HESIOD
1694                 { NSSRC_DNS, dns_setpwent, NULL },
1695 #endif
1696                 { NULL, NULL, NULL }
1697         };
1698         struct compat_state     *st;
1699         int                      rv, stayopen;
1700
1701 #define set_setent(x, y) do {                                   \
1702         int i;                                                  \
1703                                                                 \
1704         for (i = 0; i < (sizeof(x)/sizeof(x[0])) - 1; i++)      \
1705                 x[i].mdata = (void *)y;                         \
1706 } while (0)
1707
1708         rv = compat_getstate(&st);
1709         if (rv != 0)
1710                 return (NS_UNAVAIL);
1711         switch ((enum constants)mdata) {
1712         case SETPWENT:
1713                 stayopen = va_arg(ap, int);
1714                 st->keynum = 0;
1715                 if (stayopen)
1716                         st->db = pwdbopen(&st->version);
1717                 st->stayopen = stayopen;
1718                 set_setent(dtab, mdata);
1719                 _nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "setpwent",
1720                     compatsrc, 0);
1721                 break;
1722         case ENDPWENT:
1723                 if (st->db != NULL) {
1724                         st->db->close(st->db);
1725                         st->db = NULL;
1726                 }
1727                 set_setent(dtab, mdata);
1728                 _nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "endpwent",
1729                     compatsrc, 0);
1730                 break;
1731         default:
1732                 break;
1733         }
1734         return (NS_UNAVAIL);
1735 #undef set_setent
1736 }
1737
1738
1739 static int
1740 compat_passwd(void *retval, void *mdata, va_list ap)
1741 {
1742         char                     keybuf[MAXLOGNAME + 1];
1743         DBT                      key, entry;
1744         struct compat_state     *st;
1745         enum nss_lookup_type     how;
1746         const char              *name;
1747         struct passwd           *pwd;
1748         char                    *buffer, *pw_name;
1749         char                    *host, *user, *domain;
1750         size_t                   bufsize;
1751         uid_t                    uid;
1752         uint32_t                 store;
1753         int                      rv, from_compat, stayopen, *errnop;
1754
1755         from_compat = 0;
1756         name = NULL;
1757         uid = (uid_t)-1;
1758         how = (enum nss_lookup_type)mdata;
1759         switch (how) {
1760         case nss_lt_name:
1761                 name = va_arg(ap, const char *);
1762                 break;
1763         case nss_lt_id:
1764                 uid = va_arg(ap, uid_t);
1765                 break;
1766         case nss_lt_all:
1767                 break;
1768         default:
1769                 rv = NS_NOTFOUND;
1770                 goto fin;
1771         }
1772         pwd = va_arg(ap, struct passwd *);
1773         buffer = va_arg(ap, char *);
1774         bufsize = va_arg(ap, size_t);
1775         errnop = va_arg(ap, int *);
1776         *errnop = compat_getstate(&st);
1777         if (*errnop != 0)
1778                 return (NS_UNAVAIL);
1779         if (how == nss_lt_all && st->keynum < 0) {
1780                 rv = NS_NOTFOUND;
1781                 goto fin;
1782         }
1783         if (st->db == NULL &&
1784             (st->db = pwdbopen(&st->version)) == NULL) {
1785                 *errnop = errno;
1786                 rv = NS_UNAVAIL;
1787                 goto fin;
1788         }
1789         if (how == nss_lt_all) {
1790                 if (st->keynum < 0) {
1791                         rv = NS_NOTFOUND;
1792                         goto fin;
1793                 }
1794                 stayopen = 1;
1795         } else {
1796                 st->keynum = 0;
1797                 stayopen = st->stayopen;
1798         }
1799 docompat:
1800         rv = NS_NOTFOUND;
1801         switch (st->compat) {
1802         case COMPAT_MODE_ALL:
1803                 rv = compat_redispatch(st, how, how, name, name, uid, pwd,
1804                     buffer, bufsize, errnop);
1805                 if (rv != NS_SUCCESS)
1806                         st->compat = COMPAT_MODE_OFF;
1807                 break;
1808         case COMPAT_MODE_NETGROUP:
1809                 /* XXX getnetgrent is not thread-safe. */
1810                 do {
1811                         rv = getnetgrent(&host, &user, &domain);
1812                         if (rv == 0) {
1813                                 endnetgrent();
1814                                 st->compat = COMPAT_MODE_OFF;
1815                                 rv = NS_NOTFOUND;
1816                                 continue;
1817                         } else if (user == NULL || user[0] == '\0')
1818                                 continue;
1819                         rv = compat_redispatch(st, how, nss_lt_name, name,
1820                             user, uid, pwd, buffer, bufsize, errnop);
1821                 } while (st->compat == COMPAT_MODE_NETGROUP &&
1822                     !(rv & NS_TERMINATE));
1823                 break;
1824         case COMPAT_MODE_NAME:
1825                 rv = compat_redispatch(st, how, nss_lt_name, name, st->name,
1826                     uid, pwd, buffer, bufsize, errnop);
1827                 free(st->name);
1828                 st->name = NULL;
1829                 st->compat = COMPAT_MODE_OFF;
1830                 break;
1831         default:
1832                 break;
1833         }
1834         if (rv & NS_TERMINATE) {
1835                 from_compat = 1;
1836                 goto fin;
1837         }
1838         key.data = keybuf;
1839         rv = NS_NOTFOUND;
1840         while (st->keynum >= 0) {
1841                 st->keynum++;
1842                 if (st->version < _PWD_CURRENT_VERSION) {
1843                         memcpy(&keybuf[1], &st->keynum, sizeof(st->keynum));
1844                         key.size = sizeof(st->keynum) + 1;
1845                 } else {
1846                         store = htonl(st->keynum);
1847                         memcpy(&keybuf[1], &store, sizeof(store));
1848                         key.size = sizeof(store) + 1;
1849                 }
1850                 keybuf[0] = _PW_VERSIONED(_PW_KEYBYNUM, st->version);
1851                 rv = st->db->get(st->db, &key, &entry, 0);
1852                 if (rv < 0 || rv > 1) { /* should never return > 1 */
1853                         *errnop = errno;
1854                         rv = NS_UNAVAIL;
1855                         goto fin;
1856                 } else if (rv == 1) {
1857                         st->keynum = -1;
1858                         rv = NS_NOTFOUND;
1859                         goto fin;
1860                 }
1861                 pw_name = (char *)entry.data;
1862                 switch (pw_name[0]) {
1863                 case '+':
1864                         switch (pw_name[1]) {
1865                         case '\0':
1866                                 st->compat = COMPAT_MODE_ALL;
1867                                 break;
1868                         case '@':
1869                                 setnetgrent(&pw_name[2]);
1870                                 st->compat = COMPAT_MODE_NETGROUP;
1871                                 break;
1872                         default:
1873                                 st->name = strdup(&pw_name[1]);
1874                                 if (st->name == NULL) {
1875                                         syslog(LOG_ERR,
1876                                          "getpwent memory allocation failure");
1877                                         *errnop = ENOMEM;
1878                                         rv = NS_UNAVAIL;
1879                                         break;
1880                                 }
1881                                 st->compat = COMPAT_MODE_NAME;
1882                         }
1883                         if (entry.size > bufsize) {
1884                                 *errnop = ERANGE;
1885                                 rv = NS_RETURN;
1886                                 goto fin;
1887                         }
1888                         memcpy(buffer, entry.data, entry.size);
1889                         rv = pwdb_versions[st->version].parse(buffer,
1890                             entry.size, pwd, errnop);
1891                         if (rv != NS_SUCCESS)
1892                                 ;
1893                         else if (compat_set_template(pwd, &st->template) < 0) {
1894                                 *errnop = ENOMEM;
1895                                 rv = NS_UNAVAIL;
1896                                 goto fin;
1897                         }
1898                         goto docompat;
1899                 case '-':
1900                         switch (pw_name[1]) {
1901                         case '\0':
1902                                 /* XXX Maybe syslog warning */
1903                                 continue;
1904                         case '@':
1905                                 setnetgrent(&pw_name[2]);
1906                                 while (getnetgrent(&host, &user, &domain) !=
1907                                     0) {
1908                                         if (user != NULL && user[0] != '\0')
1909                                                 compat_exclude(user,
1910                                                     &st->exclude);
1911                                 }
1912                                 endnetgrent();
1913                                 continue;
1914                         default:
1915                                 compat_exclude(&pw_name[1], &st->exclude);
1916                                 continue;
1917                         }
1918                         break;
1919                 default:
1920                         break;
1921                 }
1922                 if (compat_is_excluded((char *)entry.data, st->exclude))
1923                         continue;
1924                 rv = pwdb_versions[st->version].match(entry.data, entry.size,
1925                     how, name, uid);
1926                 if (rv == NS_RETURN)
1927                         break;
1928                 else if (rv != NS_SUCCESS)
1929                         continue;
1930                 if (entry.size > bufsize) {
1931                         *errnop = ERANGE;
1932                         rv = NS_RETURN;
1933                         break;
1934                 }
1935                 memcpy(buffer, entry.data, entry.size);
1936                 rv = pwdb_versions[st->version].parse(buffer, entry.size, pwd,
1937                     errnop);
1938                 if (rv & NS_TERMINATE)
1939                         break;
1940         }
1941 fin:
1942         if (!stayopen && st->db != NULL) {
1943                 st->db->close(st->db);
1944                 st->db = NULL;
1945         }
1946         if (rv == NS_SUCCESS) {
1947                 if (!from_compat) {
1948                         pwd->pw_fields &= ~_PWF_SOURCE;
1949                         pwd->pw_fields |= _PWF_FILES;
1950                 }
1951                 if (retval != NULL)
1952                         *(struct passwd **)retval = pwd;
1953         }
1954         return (rv);
1955 }
1956
1957
1958 /*
1959  * common passwd line matching and parsing
1960  */
1961 int
1962 __pw_match_entry(const char *entry, size_t entrysize, enum nss_lookup_type how,
1963     const char *name, uid_t uid)
1964 {
1965         const char      *p, *eom;
1966         char            *q;
1967         size_t           len;
1968         unsigned long    m;
1969
1970         eom = entry + entrysize;
1971         for (p = entry; p < eom; p++)
1972                 if (*p == ':')
1973                         break;
1974         if (*p != ':')
1975                 return (NS_NOTFOUND);
1976         if (how == nss_lt_all)
1977                 return (NS_SUCCESS);
1978         if (how == nss_lt_name) {
1979                 len = strlen(name);
1980                 if (len == (p - entry) && memcmp(name, entry, len) == 0)
1981                         return (NS_SUCCESS);
1982                 else
1983                         return (NS_NOTFOUND);
1984         }
1985         for (p++; p < eom; p++)
1986                 if (*p == ':')
1987                         break;
1988         if (*p != ':')
1989                 return (NS_NOTFOUND);
1990         m = strtoul(++p, &q, 10);
1991         if (q[0] != ':' || (uid_t)m != uid)
1992                 return (NS_NOTFOUND);
1993         else
1994                 return (NS_SUCCESS);
1995 }
1996
1997
1998 /* XXX buffer must be NUL-terminated.  errnop is not set correctly. */
1999 int
2000 __pw_parse_entry(char *buffer, size_t bufsize __unused, struct passwd *pwd,
2001     int master, int *errnop __unused)
2002 {
2003
2004         if (__pw_scan(buffer, pwd, master ? _PWSCAN_MASTER : 0) == 0)
2005                 return (NS_NOTFOUND);
2006         else
2007                 return (NS_SUCCESS);
2008 }