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 */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 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 <assert.h> 44 #include <ctype.h> 45 #include <errno.h> 46 #ifdef HESIOD 47 #include <hesiod.h> 48 #endif 49 #include <grp.h> 50 #include <nsswitch.h> 51 #include <pthread.h> 52 #include <pthread_np.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <syslog.h> 57 #include <unistd.h> 58 #include "un-namespace.h" 59 #include "libc_private.h" 60 #include "nss_tls.h" 61 #ifdef NS_CACHING 62 #include "nscache.h" 63 #endif 64 65 enum constants { 66 GRP_STORAGE_INITIAL = 1 << 10, /* 1 KByte */ 67 GRP_STORAGE_MAX = 1 << 20, /* 1 MByte */ 68 SETGRENT = 1, 69 ENDGRENT = 2, 70 HESIOD_NAME_MAX = 256, 71 }; 72 73 static const ns_src defaultsrc[] = { 74 { NSSRC_COMPAT, NS_SUCCESS }, 75 { NULL, 0 } 76 }; 77 78 int __getgroupmembership(const char *, gid_t, gid_t *, int, int *); 79 int __gr_match_entry(const char *, size_t, enum nss_lookup_type, 80 const char *, gid_t); 81 int __gr_parse_entry(char *, size_t, struct group *, char *, size_t, 82 int *); 83 84 static int is_comment_line(const char *, size_t); 85 86 union key { 87 const char *name; 88 gid_t gid; 89 }; 90 static struct group *getgr(int (*)(union key, struct group *, char *, size_t, 91 struct group **), union key); 92 static int wrap_getgrnam_r(union key, struct group *, char *, size_t, 93 struct group **); 94 static int wrap_getgrgid_r(union key, struct group *, char *, size_t, 95 struct group **); 96 static int wrap_getgrent_r(union key, struct group *, char *, size_t, 97 struct group **); 98 99 struct files_state { 100 FILE *fp; 101 int stayopen; 102 }; 103 static void files_endstate(void *); 104 NSS_TLS_HANDLING(files); 105 static int files_setgrent(void *, void *, va_list); 106 static int files_group(void *, void *, va_list); 107 108 109 #ifdef HESIOD 110 struct dns_state { 111 long counter; 112 }; 113 static void dns_endstate(void *); 114 NSS_TLS_HANDLING(dns); 115 static int dns_setgrent(void *, void *, va_list); 116 static int dns_group(void *, void *, va_list); 117 #endif 118 119 120 #ifdef YP 121 struct nis_state { 122 char domain[MAXHOSTNAMELEN]; 123 int done; 124 char *key; 125 int keylen; 126 }; 127 static void nis_endstate(void *); 128 NSS_TLS_HANDLING(nis); 129 static int nis_setgrent(void *, void *, va_list); 130 static int nis_group(void *, void *, va_list); 131 #endif 132 133 struct compat_state { 134 FILE *fp; 135 int stayopen; 136 char *name; 137 enum _compat { 138 COMPAT_MODE_OFF = 0, 139 COMPAT_MODE_ALL, 140 COMPAT_MODE_NAME 141 } compat; 142 }; 143 static void compat_endstate(void *); 144 NSS_TLS_HANDLING(compat); 145 static int compat_setgrent(void *, void *, va_list); 146 static int compat_group(void *, void *, va_list); 147 148 static int gr_addgid(gid_t, gid_t *, int, int *); 149 static int getgroupmembership_fallback(void *, void *, va_list); 150 151 #ifdef NS_CACHING 152 static int grp_id_func(char *, size_t *, va_list, void *); 153 static int grp_marshal_func(char *, size_t *, void *, va_list, void *); 154 static int grp_unmarshal_func(char *, size_t, void *, va_list, void *); 155 156 static int 157 grp_id_func(char *buffer, size_t *buffer_size, va_list ap, void *cache_mdata) 158 { 159 char *name; 160 gid_t gid; 161 162 size_t desired_size, size; 163 int res = NS_UNAVAIL; 164 enum nss_lookup_type lookup_type; 165 166 167 lookup_type = (enum nss_lookup_type)cache_mdata; 168 switch (lookup_type) { 169 case nss_lt_name: 170 name = va_arg(ap, char *); 171 size = strlen(name); 172 desired_size = sizeof(enum nss_lookup_type) + size + 1; 173 if (desired_size > *buffer_size) { 174 res = NS_RETURN; 175 goto fin; 176 } 177 178 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type)); 179 memcpy(buffer + sizeof(enum nss_lookup_type), name, size + 1); 180 181 res = NS_SUCCESS; 182 break; 183 case nss_lt_id: 184 gid = va_arg(ap, gid_t); 185 desired_size = sizeof(enum nss_lookup_type) + sizeof(gid_t); 186 if (desired_size > *buffer_size) { 187 res = NS_RETURN; 188 goto fin; 189 } 190 191 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type)); 192 memcpy(buffer + sizeof(enum nss_lookup_type), &gid, 193 sizeof(gid_t)); 194 195 res = NS_SUCCESS; 196 break; 197 default: 198 /* should be unreachable */ 199 return (NS_UNAVAIL); 200 } 201 202 fin: 203 *buffer_size = desired_size; 204 return (res); 205 } 206 207 static int 208 grp_marshal_func(char *buffer, size_t *buffer_size, void *retval, va_list ap, 209 void *cache_mdata) 210 { 211 char *name; 212 gid_t gid; 213 struct group *grp; 214 char *orig_buf; 215 size_t orig_buf_size; 216 217 struct group new_grp; 218 size_t desired_size, size, mem_size; 219 char *p, **mem; 220 221 switch ((enum nss_lookup_type)cache_mdata) { 222 case nss_lt_name: 223 name = va_arg(ap, char *); 224 break; 225 case nss_lt_id: 226 gid = va_arg(ap, gid_t); 227 break; 228 case nss_lt_all: 229 break; 230 default: 231 /* should be unreachable */ 232 return (NS_UNAVAIL); 233 } 234 235 grp = va_arg(ap, struct group *); 236 orig_buf = va_arg(ap, char *); 237 orig_buf_size = va_arg(ap, size_t); 238 239 desired_size = _ALIGNBYTES + sizeof(struct group) + sizeof(char *); 240 241 if (grp->gr_name != NULL) 242 desired_size += strlen(grp->gr_name) + 1; 243 if (grp->gr_passwd != NULL) 244 desired_size += strlen(grp->gr_passwd) + 1; 245 246 if (grp->gr_mem != NULL) { 247 mem_size = 0; 248 for (mem = grp->gr_mem; *mem; ++mem) { 249 desired_size += strlen(*mem) + 1; 250 ++mem_size; 251 } 252 253 desired_size += _ALIGNBYTES + (mem_size + 1) * sizeof(char *); 254 } 255 256 if (desired_size > *buffer_size) { 257 /* this assignment is here for future use */ 258 *buffer_size = desired_size; 259 return (NS_RETURN); 260 } 261 262 memcpy(&new_grp, grp, sizeof(struct group)); 263 memset(buffer, 0, desired_size); 264 265 *buffer_size = desired_size; 266 p = buffer + sizeof(struct group) + sizeof(char *); 267 memcpy(buffer + sizeof(struct group), &p, sizeof(char *)); 268 p = (char *)_ALIGN(p); 269 270 if (new_grp.gr_name != NULL) { 271 size = strlen(new_grp.gr_name); 272 memcpy(p, new_grp.gr_name, size); 273 new_grp.gr_name = p; 274 p += size + 1; 275 } 276 277 if (new_grp.gr_passwd != NULL) { 278 size = strlen(new_grp.gr_passwd); 279 memcpy(p, new_grp.gr_passwd, size); 280 new_grp.gr_passwd = p; 281 p += size + 1; 282 } 283 284 if (new_grp.gr_mem != NULL) { 285 p = (char *)_ALIGN(p); 286 memcpy(p, new_grp.gr_mem, sizeof(char *) * mem_size); 287 new_grp.gr_mem = (char **)p; 288 p += sizeof(char *) * (mem_size + 1); 289 290 for (mem = new_grp.gr_mem; *mem; ++mem) { 291 size = strlen(*mem); 292 memcpy(p, *mem, size); 293 *mem = p; 294 p += size + 1; 295 } 296 } 297 298 memcpy(buffer, &new_grp, sizeof(struct group)); 299 return (NS_SUCCESS); 300 } 301 302 static int 303 grp_unmarshal_func(char *buffer, size_t buffer_size, void *retval, va_list ap, 304 void *cache_mdata) 305 { 306 char *name; 307 gid_t gid; 308 struct group *grp; 309 char *orig_buf; 310 size_t orig_buf_size; 311 int *ret_errno; 312 313 char *p; 314 char **mem; 315 316 switch ((enum nss_lookup_type)cache_mdata) { 317 case nss_lt_name: 318 name = va_arg(ap, char *); 319 break; 320 case nss_lt_id: 321 gid = va_arg(ap, gid_t); 322 break; 323 case nss_lt_all: 324 break; 325 default: 326 /* should be unreachable */ 327 return (NS_UNAVAIL); 328 } 329 330 grp = va_arg(ap, struct group *); 331 orig_buf = va_arg(ap, char *); 332 orig_buf_size = va_arg(ap, size_t); 333 ret_errno = va_arg(ap, int *); 334 335 if (orig_buf_size < 336 buffer_size - sizeof(struct group) - sizeof(char *)) { 337 *ret_errno = ERANGE; 338 return (NS_RETURN); 339 } 340 341 memcpy(grp, buffer, sizeof(struct group)); 342 memcpy(&p, buffer + sizeof(struct group), sizeof(char *)); 343 344 orig_buf = (char *)_ALIGN(orig_buf); 345 memcpy(orig_buf, buffer + sizeof(struct group) + sizeof(char *) + 346 _ALIGN(p) - (size_t)p, 347 buffer_size - sizeof(struct group) - sizeof(char *) - 348 _ALIGN(p) + (size_t)p); 349 p = (char *)_ALIGN(p); 350 351 NS_APPLY_OFFSET(grp->gr_name, orig_buf, p, char *); 352 NS_APPLY_OFFSET(grp->gr_passwd, orig_buf, p, char *); 353 if (grp->gr_mem != NULL) { 354 NS_APPLY_OFFSET(grp->gr_mem, orig_buf, p, char **); 355 356 for (mem = grp->gr_mem; *mem; ++mem) 357 NS_APPLY_OFFSET(*mem, orig_buf, p, char *); 358 } 359 360 if (retval != NULL) 361 *((struct group **)retval) = grp; 362 363 return (NS_SUCCESS); 364 } 365 366 NSS_MP_CACHE_HANDLING(group); 367 #endif /* NS_CACHING */ 368 369 #ifdef NS_CACHING 370 static const nss_cache_info setgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER( 371 group, (void *)nss_lt_all, 372 NULL, NULL); 373 #endif 374 375 static const ns_dtab setgrent_dtab[] = { 376 { NSSRC_FILES, files_setgrent, (void *)SETGRENT }, 377 #ifdef HESIOD 378 { NSSRC_DNS, dns_setgrent, (void *)SETGRENT }, 379 #endif 380 #ifdef YP 381 { NSSRC_NIS, nis_setgrent, (void *)SETGRENT }, 382 #endif 383 { NSSRC_COMPAT, compat_setgrent, (void *)SETGRENT }, 384 #ifdef NS_CACHING 385 NS_CACHE_CB(&setgrent_cache_info) 386 #endif 387 { NULL, NULL, NULL } 388 }; 389 390 #ifdef NS_CACHING 391 static const nss_cache_info endgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER( 392 group, (void *)nss_lt_all, 393 NULL, NULL); 394 #endif 395 396 static const ns_dtab endgrent_dtab[] = { 397 { NSSRC_FILES, files_setgrent, (void *)ENDGRENT }, 398 #ifdef HESIOD 399 { NSSRC_DNS, dns_setgrent, (void *)ENDGRENT }, 400 #endif 401 #ifdef YP 402 { NSSRC_NIS, nis_setgrent, (void *)ENDGRENT }, 403 #endif 404 { NSSRC_COMPAT, compat_setgrent, (void *)ENDGRENT }, 405 #ifdef NS_CACHING 406 NS_CACHE_CB(&endgrent_cache_info) 407 #endif 408 { NULL, NULL, NULL } 409 }; 410 411 #ifdef NS_CACHING 412 static const nss_cache_info getgrent_r_cache_info = NS_MP_CACHE_INFO_INITIALIZER( 413 group, (void *)nss_lt_all, 414 grp_marshal_func, grp_unmarshal_func); 415 #endif 416 417 static const ns_dtab getgrent_r_dtab[] = { 418 { NSSRC_FILES, files_group, (void *)nss_lt_all }, 419 #ifdef HESIOD 420 { NSSRC_DNS, dns_group, (void *)nss_lt_all }, 421 #endif 422 #ifdef YP 423 { NSSRC_NIS, nis_group, (void *)nss_lt_all }, 424 #endif 425 { NSSRC_COMPAT, compat_group, (void *)nss_lt_all }, 426 #ifdef NS_CACHING 427 NS_CACHE_CB(&getgrent_r_cache_info) 428 #endif 429 { NULL, NULL, NULL } 430 }; 431 432 static int 433 gr_addgid(gid_t gid, gid_t *groups, int maxgrp, int *grpcnt) 434 { 435 int ret, dupc; 436 437 for (dupc = 0; dupc < MIN(maxgrp, *grpcnt); dupc++) { 438 if (groups[dupc] == gid) 439 return 1; 440 } 441 442 ret = 1; 443 if (*grpcnt < maxgrp) 444 groups[*grpcnt] = gid; 445 else 446 ret = 0; 447 448 (*grpcnt)++; 449 450 return ret; 451 } 452 453 static int 454 getgroupmembership_fallback(void *retval, void *mdata, va_list ap) 455 { 456 const ns_src src[] = { 457 { mdata, NS_SUCCESS }, 458 { NULL, 0} 459 }; 460 struct group grp; 461 struct group *grp_p; 462 char *buf; 463 size_t bufsize; 464 const char *uname; 465 gid_t *groups; 466 gid_t agroup; 467 int maxgrp, *grpcnt; 468 int i, rv, ret_errno; 469 470 /* 471 * As this is a fallback method, only provided src 472 * list will be respected during methods search. 473 */ 474 assert(src[0].name != NULL); 475 476 uname = va_arg(ap, const char *); 477 agroup = va_arg(ap, gid_t); 478 groups = va_arg(ap, gid_t *); 479 maxgrp = va_arg(ap, int); 480 grpcnt = va_arg(ap, int *); 481 482 rv = NS_UNAVAIL; 483 484 buf = malloc(GRP_STORAGE_INITIAL); 485 if (buf == NULL) 486 goto out; 487 488 bufsize = GRP_STORAGE_INITIAL; 489 490 gr_addgid(agroup, groups, maxgrp, grpcnt); 491 492 _nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", src, 0); 493 for (;;) { 494 do { 495 ret_errno = 0; 496 grp_p = NULL; 497 rv = _nsdispatch(&grp_p, getgrent_r_dtab, NSDB_GROUP, 498 "getgrent_r", src, &grp, buf, bufsize, &ret_errno); 499 500 if (grp_p == NULL && ret_errno == ERANGE) { 501 free(buf); 502 if ((bufsize << 1) > GRP_STORAGE_MAX) { 503 buf = NULL; 504 errno = ERANGE; 505 goto out; 506 } 507 508 bufsize <<= 1; 509 buf = malloc(bufsize); 510 if (buf == NULL) { 511 goto out; 512 } 513 } 514 } while (grp_p == NULL && ret_errno == ERANGE); 515 516 if (ret_errno != 0) { 517 errno = ret_errno; 518 goto out; 519 } 520 521 if (grp_p == NULL) 522 break; 523 524 for (i = 0; grp.gr_mem[i]; i++) { 525 if (strcmp(grp.gr_mem[i], uname) == 0) 526 gr_addgid(grp.gr_gid, groups, maxgrp, grpcnt); 527 } 528 } 529 530 _nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", src); 531 out: 532 free(buf); 533 return (rv); 534 } 535 536 /* XXX IEEE Std 1003.1, 2003 specifies `void setgrent(void)' */ 537 int 538 setgrent(void) 539 { 540 (void)_nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc, 0); 541 return (1); 542 } 543 544 545 int 546 setgroupent(int stayopen) 547 { 548 (void)_nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc, 549 stayopen); 550 return (1); 551 } 552 553 554 void 555 endgrent(void) 556 { 557 (void)_nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", defaultsrc); 558 } 559 560 561 int 562 getgrent_r(struct group *grp, char *buffer, size_t bufsize, 563 struct group **result) 564 { 565 int rv, ret_errno; 566 567 ret_errno = 0; 568 *result = NULL; 569 rv = _nsdispatch(result, getgrent_r_dtab, NSDB_GROUP, "getgrent_r", defaultsrc, 570 grp, buffer, bufsize, &ret_errno); 571 if (rv == NS_SUCCESS) 572 return (0); 573 else 574 return (ret_errno); 575 } 576 577 578 int 579 getgrnam_r(const char *name, struct group *grp, char *buffer, size_t bufsize, 580 struct group **result) 581 { 582 #ifdef NS_CACHING 583 static const nss_cache_info cache_info = 584 NS_COMMON_CACHE_INFO_INITIALIZER( 585 group, (void *)nss_lt_name, 586 grp_id_func, grp_marshal_func, grp_unmarshal_func); 587 #endif 588 589 static const ns_dtab dtab[] = { 590 { NSSRC_FILES, files_group, (void *)nss_lt_name }, 591 #ifdef HESIOD 592 { NSSRC_DNS, dns_group, (void *)nss_lt_name }, 593 #endif 594 #ifdef YP 595 { NSSRC_NIS, nis_group, (void *)nss_lt_name }, 596 #endif 597 { NSSRC_COMPAT, compat_group, (void *)nss_lt_name }, 598 #ifdef NS_CACHING 599 NS_CACHE_CB(&cache_info) 600 #endif 601 { NULL, NULL, NULL } 602 }; 603 int rv, ret_errno; 604 605 ret_errno = 0; 606 *result = NULL; 607 rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrnam_r", defaultsrc, 608 name, grp, buffer, bufsize, &ret_errno); 609 if (rv == NS_SUCCESS) 610 return (0); 611 else 612 return (ret_errno); 613 } 614 615 616 int 617 getgrgid_r(gid_t gid, struct group *grp, char *buffer, size_t bufsize, 618 struct group **result) 619 { 620 #ifdef NS_CACHING 621 static const nss_cache_info cache_info = 622 NS_COMMON_CACHE_INFO_INITIALIZER( 623 group, (void *)nss_lt_id, 624 grp_id_func, grp_marshal_func, grp_unmarshal_func); 625 #endif 626 627 static const ns_dtab dtab[] = { 628 { NSSRC_FILES, files_group, (void *)nss_lt_id }, 629 #ifdef HESIOD 630 { NSSRC_DNS, dns_group, (void *)nss_lt_id }, 631 #endif 632 #ifdef YP 633 { NSSRC_NIS, nis_group, (void *)nss_lt_id }, 634 #endif 635 { NSSRC_COMPAT, compat_group, (void *)nss_lt_id }, 636 #ifdef NS_CACHING 637 NS_CACHE_CB(&cache_info) 638 #endif 639 { NULL, NULL, NULL } 640 }; 641 int rv, ret_errno; 642 643 ret_errno = 0; 644 *result = NULL; 645 rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrgid_r", defaultsrc, 646 gid, grp, buffer, bufsize, &ret_errno); 647 if (rv == NS_SUCCESS) 648 return (0); 649 else 650 return (ret_errno); 651 } 652 653 654 655 int 656 __getgroupmembership(const char *uname, gid_t agroup, gid_t *groups, 657 int maxgrp, int *grpcnt) 658 { 659 static const ns_dtab dtab[] = { 660 NS_FALLBACK_CB(getgroupmembership_fallback) 661 { NULL, NULL, NULL } 662 }; 663 664 assert(uname != NULL); 665 /* groups may be NULL if just sizing when invoked with maxgrp = 0 */ 666 assert(grpcnt != NULL); 667 668 *grpcnt = 0; 669 (void)_nsdispatch(NULL, dtab, NSDB_GROUP, "getgroupmembership", 670 defaultsrc, uname, agroup, groups, maxgrp, grpcnt); 671 672 /* too many groups found? */ 673 return (*grpcnt > maxgrp ? -1 : 0); 674 } 675 676 677 static struct group grp; 678 static char *grp_storage; 679 static size_t grp_storage_size; 680 681 static struct group * 682 getgr(int (*fn)(union key, struct group *, char *, size_t, struct group **), 683 union key key) 684 { 685 int rv; 686 struct group *res; 687 688 if (grp_storage == NULL) { 689 grp_storage = malloc(GRP_STORAGE_INITIAL); 690 if (grp_storage == NULL) 691 return (NULL); 692 grp_storage_size = GRP_STORAGE_INITIAL; 693 } 694 do { 695 rv = fn(key, &grp, grp_storage, grp_storage_size, &res); 696 if (res == NULL && rv == ERANGE) { 697 free(grp_storage); 698 if ((grp_storage_size << 1) > GRP_STORAGE_MAX) { 699 grp_storage = NULL; 700 errno = ERANGE; 701 return (NULL); 702 } 703 grp_storage_size <<= 1; 704 grp_storage = malloc(grp_storage_size); 705 if (grp_storage == NULL) 706 return (NULL); 707 } 708 } while (res == NULL && rv == ERANGE); 709 if (rv != 0) 710 errno = rv; 711 return (res); 712 } 713 714 715 static int 716 wrap_getgrnam_r(union key key, struct group *grp, char *buffer, size_t bufsize, 717 struct group **res) 718 { 719 return (getgrnam_r(key.name, grp, buffer, bufsize, res)); 720 } 721 722 723 static int 724 wrap_getgrgid_r(union key key, struct group *grp, char *buffer, size_t bufsize, 725 struct group **res) 726 { 727 return (getgrgid_r(key.gid, grp, buffer, bufsize, res)); 728 } 729 730 731 static int 732 wrap_getgrent_r(union key key __unused, struct group *grp, char *buffer, 733 size_t bufsize, struct group **res) 734 { 735 return (getgrent_r(grp, buffer, bufsize, res)); 736 } 737 738 739 struct group * 740 getgrnam(const char *name) 741 { 742 union key key; 743 744 key.name = name; 745 return (getgr(wrap_getgrnam_r, key)); 746 } 747 748 749 struct group * 750 getgrgid(gid_t gid) 751 { 752 union key key; 753 754 key.gid = gid; 755 return (getgr(wrap_getgrgid_r, key)); 756 } 757 758 759 struct group * 760 getgrent(void) 761 { 762 union key key; 763 764 key.gid = 0; /* not used */ 765 return (getgr(wrap_getgrent_r, key)); 766 } 767 768 769 static int 770 is_comment_line(const char *s, size_t n) 771 { 772 const char *eom; 773 774 eom = &s[n]; 775 776 for (; s < eom; s++) 777 if (*s == '#' || !isspace((unsigned char)*s)) 778 break; 779 return (*s == '#' || s == eom); 780 } 781 782 783 /* 784 * files backend 785 */ 786 static void 787 files_endstate(void *p) 788 { 789 790 if (p == NULL) 791 return; 792 if (((struct files_state *)p)->fp != NULL) 793 fclose(((struct files_state *)p)->fp); 794 free(p); 795 } 796 797 798 static int 799 files_setgrent(void *retval, void *mdata, va_list ap) 800 { 801 struct files_state *st; 802 int rv, stayopen; 803 804 rv = files_getstate(&st); 805 if (rv != 0) 806 return (NS_UNAVAIL); 807 switch ((enum constants)mdata) { 808 case SETGRENT: 809 stayopen = va_arg(ap, int); 810 if (st->fp != NULL) 811 rewind(st->fp); 812 else if (stayopen) 813 st->fp = fopen(_PATH_GROUP, "re"); 814 break; 815 case ENDGRENT: 816 if (st->fp != NULL) { 817 fclose(st->fp); 818 st->fp = NULL; 819 } 820 break; 821 default: 822 break; 823 } 824 return (NS_UNAVAIL); 825 } 826 827 828 static int 829 files_group(void *retval, void *mdata, va_list ap) 830 { 831 struct files_state *st; 832 enum nss_lookup_type how; 833 const char *name, *line; 834 struct group *grp; 835 gid_t gid; 836 char *buffer; 837 size_t bufsize, linesize; 838 off_t pos; 839 int rv, stayopen, *errnop; 840 841 name = NULL; 842 gid = (gid_t)-1; 843 how = (enum nss_lookup_type)mdata; 844 switch (how) { 845 case nss_lt_name: 846 name = va_arg(ap, const char *); 847 break; 848 case nss_lt_id: 849 gid = va_arg(ap, gid_t); 850 break; 851 case nss_lt_all: 852 break; 853 default: 854 return (NS_NOTFOUND); 855 } 856 grp = va_arg(ap, struct group *); 857 buffer = va_arg(ap, char *); 858 bufsize = va_arg(ap, size_t); 859 errnop = va_arg(ap, int *); 860 *errnop = files_getstate(&st); 861 if (*errnop != 0) 862 return (NS_UNAVAIL); 863 if (st->fp == NULL && 864 ((st->fp = fopen(_PATH_GROUP, "re")) == NULL)) { 865 *errnop = errno; 866 return (NS_UNAVAIL); 867 } 868 if (how == nss_lt_all) 869 stayopen = 1; 870 else { 871 rewind(st->fp); 872 stayopen = st->stayopen; 873 } 874 rv = NS_NOTFOUND; 875 pos = ftello(st->fp); 876 while ((line = fgetln(st->fp, &linesize)) != NULL) { 877 if (line[linesize-1] == '\n') 878 linesize--; 879 rv = __gr_match_entry(line, linesize, how, name, gid); 880 if (rv != NS_SUCCESS) 881 continue; 882 /* We need room at least for the line, a string NUL 883 * terminator, alignment padding, and one (char *) 884 * pointer for the member list terminator. 885 */ 886 if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) { 887 *errnop = ERANGE; 888 rv = NS_RETURN; 889 break; 890 } 891 memcpy(buffer, line, linesize); 892 buffer[linesize] = '\0'; 893 rv = __gr_parse_entry(buffer, linesize, grp, 894 &buffer[linesize + 1], bufsize - linesize - 1, errnop); 895 if (rv & NS_TERMINATE) 896 break; 897 pos = ftello(st->fp); 898 } 899 if (st->fp != NULL && !stayopen) { 900 fclose(st->fp); 901 st->fp = NULL; 902 } 903 if (rv == NS_SUCCESS && retval != NULL) 904 *(struct group **)retval = grp; 905 else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL) 906 fseeko(st->fp, pos, SEEK_SET); 907 return (rv); 908 } 909 910 911 #ifdef HESIOD 912 /* 913 * dns backend 914 */ 915 static void 916 dns_endstate(void *p) 917 { 918 919 free(p); 920 } 921 922 923 static int 924 dns_setgrent(void *retval, void *cb_data, va_list ap) 925 { 926 struct dns_state *st; 927 int rv; 928 929 rv = dns_getstate(&st); 930 if (rv != 0) 931 return (NS_UNAVAIL); 932 st->counter = 0; 933 return (NS_UNAVAIL); 934 } 935 936 937 static int 938 dns_group(void *retval, void *mdata, va_list ap) 939 { 940 char buf[HESIOD_NAME_MAX]; 941 struct dns_state *st; 942 struct group *grp; 943 const char *name, *label; 944 void *ctx; 945 char *buffer, **hes; 946 size_t bufsize, adjsize, linesize; 947 gid_t gid; 948 enum nss_lookup_type how; 949 int rv, *errnop; 950 951 ctx = NULL; 952 hes = NULL; 953 name = NULL; 954 gid = (gid_t)-1; 955 how = (enum nss_lookup_type)mdata; 956 switch (how) { 957 case nss_lt_name: 958 name = va_arg(ap, const char *); 959 break; 960 case nss_lt_id: 961 gid = va_arg(ap, gid_t); 962 break; 963 case nss_lt_all: 964 break; 965 } 966 grp = va_arg(ap, struct group *); 967 buffer = va_arg(ap, char *); 968 bufsize = va_arg(ap, size_t); 969 errnop = va_arg(ap, int *); 970 *errnop = dns_getstate(&st); 971 if (*errnop != 0) 972 return (NS_UNAVAIL); 973 if (hesiod_init(&ctx) != 0) { 974 *errnop = errno; 975 rv = NS_UNAVAIL; 976 goto fin; 977 } 978 do { 979 rv = NS_NOTFOUND; 980 switch (how) { 981 case nss_lt_name: 982 label = name; 983 break; 984 case nss_lt_id: 985 if (snprintf(buf, sizeof(buf), "%lu", 986 (unsigned long)gid) >= sizeof(buf)) 987 goto fin; 988 label = buf; 989 break; 990 case nss_lt_all: 991 if (st->counter < 0) 992 goto fin; 993 if (snprintf(buf, sizeof(buf), "group-%ld", 994 st->counter++) >= sizeof(buf)) 995 goto fin; 996 label = buf; 997 break; 998 } 999 hes = hesiod_resolve(ctx, label, 1000 how == nss_lt_id ? "gid" : "group"); 1001 if ((how == nss_lt_id && hes == NULL && 1002 (hes = hesiod_resolve(ctx, buf, "group")) == NULL) || 1003 hes == NULL) { 1004 if (how == nss_lt_all) 1005 st->counter = -1; 1006 if (errno != ENOENT) 1007 *errnop = errno; 1008 goto fin; 1009 } 1010 rv = __gr_match_entry(hes[0], strlen(hes[0]), how, name, gid); 1011 if (rv != NS_SUCCESS) { 1012 hesiod_free_list(ctx, hes); 1013 hes = NULL; 1014 continue; 1015 } 1016 /* We need room at least for the line, a string NUL 1017 * terminator, alignment padding, and one (char *) 1018 * pointer for the member list terminator. 1019 */ 1020 adjsize = bufsize - _ALIGNBYTES - sizeof(char *); 1021 linesize = strlcpy(buffer, hes[0], adjsize); 1022 if (linesize >= adjsize) { 1023 *errnop = ERANGE; 1024 rv = NS_RETURN; 1025 goto fin; 1026 } 1027 hesiod_free_list(ctx, hes); 1028 hes = NULL; 1029 rv = __gr_parse_entry(buffer, linesize, grp, 1030 &buffer[linesize + 1], bufsize - linesize - 1, errnop); 1031 } while (how == nss_lt_all && !(rv & NS_TERMINATE)); 1032 fin: 1033 if (hes != NULL) 1034 hesiod_free_list(ctx, hes); 1035 if (ctx != NULL) 1036 hesiod_end(ctx); 1037 if (rv == NS_SUCCESS && retval != NULL) 1038 *(struct group **)retval = grp; 1039 return (rv); 1040 } 1041 #endif /* HESIOD */ 1042 1043 1044 #ifdef YP 1045 /* 1046 * nis backend 1047 */ 1048 static void 1049 nis_endstate(void *p) 1050 { 1051 1052 if (p == NULL) 1053 return; 1054 free(((struct nis_state *)p)->key); 1055 free(p); 1056 } 1057 1058 1059 static int 1060 nis_setgrent(void *retval, void *cb_data, va_list ap) 1061 { 1062 struct nis_state *st; 1063 int rv; 1064 1065 rv = nis_getstate(&st); 1066 if (rv != 0) 1067 return (NS_UNAVAIL); 1068 st->done = 0; 1069 free(st->key); 1070 st->key = NULL; 1071 return (NS_UNAVAIL); 1072 } 1073 1074 1075 static int 1076 nis_group(void *retval, void *mdata, va_list ap) 1077 { 1078 char *map; 1079 struct nis_state *st; 1080 struct group *grp; 1081 const char *name; 1082 char *buffer, *key, *result; 1083 size_t bufsize; 1084 gid_t gid; 1085 enum nss_lookup_type how; 1086 int *errnop, keylen, resultlen, rv; 1087 1088 name = NULL; 1089 gid = (gid_t)-1; 1090 how = (enum nss_lookup_type)mdata; 1091 switch (how) { 1092 case nss_lt_name: 1093 name = va_arg(ap, const char *); 1094 map = "group.byname"; 1095 break; 1096 case nss_lt_id: 1097 gid = va_arg(ap, gid_t); 1098 map = "group.bygid"; 1099 break; 1100 case nss_lt_all: 1101 map = "group.byname"; 1102 break; 1103 } 1104 grp = va_arg(ap, struct group *); 1105 buffer = va_arg(ap, char *); 1106 bufsize = va_arg(ap, size_t); 1107 errnop = va_arg(ap, int *); 1108 *errnop = nis_getstate(&st); 1109 if (*errnop != 0) 1110 return (NS_UNAVAIL); 1111 if (st->domain[0] == '\0') { 1112 if (getdomainname(st->domain, sizeof(st->domain)) != 0) { 1113 *errnop = errno; 1114 return (NS_UNAVAIL); 1115 } 1116 } 1117 result = NULL; 1118 do { 1119 rv = NS_NOTFOUND; 1120 switch (how) { 1121 case nss_lt_name: 1122 if (strlcpy(buffer, name, bufsize) >= bufsize) 1123 goto erange; 1124 break; 1125 case nss_lt_id: 1126 if (snprintf(buffer, bufsize, "%lu", 1127 (unsigned long)gid) >= bufsize) 1128 goto erange; 1129 break; 1130 case nss_lt_all: 1131 if (st->done) 1132 goto fin; 1133 break; 1134 } 1135 result = NULL; 1136 if (how == nss_lt_all) { 1137 if (st->key == NULL) 1138 rv = yp_first(st->domain, map, &st->key, 1139 &st->keylen, &result, &resultlen); 1140 else { 1141 key = st->key; 1142 keylen = st->keylen; 1143 st->key = NULL; 1144 rv = yp_next(st->domain, map, key, keylen, 1145 &st->key, &st->keylen, &result, 1146 &resultlen); 1147 free(key); 1148 } 1149 if (rv != 0) { 1150 free(result); 1151 free(st->key); 1152 st->key = NULL; 1153 if (rv == YPERR_NOMORE) { 1154 st->done = 1; 1155 rv = NS_NOTFOUND; 1156 } else 1157 rv = NS_UNAVAIL; 1158 goto fin; 1159 } 1160 } else { 1161 rv = yp_match(st->domain, map, buffer, strlen(buffer), 1162 &result, &resultlen); 1163 if (rv == YPERR_KEY) { 1164 rv = NS_NOTFOUND; 1165 continue; 1166 } else if (rv != 0) { 1167 free(result); 1168 rv = NS_UNAVAIL; 1169 continue; 1170 } 1171 } 1172 /* We need room at least for the line, a string NUL 1173 * terminator, alignment padding, and one (char *) 1174 * pointer for the member list terminator. 1175 */ 1176 if (resultlen >= bufsize - _ALIGNBYTES - sizeof(char *)) { 1177 free(result); 1178 goto erange; 1179 } 1180 memcpy(buffer, result, resultlen); 1181 buffer[resultlen] = '\0'; 1182 free(result); 1183 rv = __gr_match_entry(buffer, resultlen, how, name, gid); 1184 if (rv == NS_SUCCESS) 1185 rv = __gr_parse_entry(buffer, resultlen, grp, 1186 &buffer[resultlen+1], bufsize - resultlen - 1, 1187 errnop); 1188 } while (how == nss_lt_all && !(rv & NS_TERMINATE)); 1189 fin: 1190 if (rv == NS_SUCCESS && retval != NULL) 1191 *(struct group **)retval = grp; 1192 return (rv); 1193 erange: 1194 *errnop = ERANGE; 1195 return (NS_RETURN); 1196 } 1197 #endif /* YP */ 1198 1199 1200 1201 /* 1202 * compat backend 1203 */ 1204 static void 1205 compat_endstate(void *p) 1206 { 1207 struct compat_state *st; 1208 1209 if (p == NULL) 1210 return; 1211 st = (struct compat_state *)p; 1212 free(st->name); 1213 if (st->fp != NULL) 1214 fclose(st->fp); 1215 free(p); 1216 } 1217 1218 1219 static int 1220 compat_setgrent(void *retval, void *mdata, va_list ap) 1221 { 1222 static const ns_src compatsrc[] = { 1223 #ifdef YP 1224 { NSSRC_NIS, NS_SUCCESS }, 1225 #endif 1226 { NULL, 0 } 1227 }; 1228 ns_dtab dtab[] = { 1229 #ifdef HESIOD 1230 { NSSRC_DNS, dns_setgrent, NULL }, 1231 #endif 1232 #ifdef YP 1233 { NSSRC_NIS, nis_setgrent, NULL }, 1234 #endif 1235 { NULL, NULL, NULL } 1236 }; 1237 struct compat_state *st; 1238 int rv, stayopen; 1239 1240 #define set_setent(x, y) do { \ 1241 int i; \ 1242 for (i = 0; i < (int)(nitems(x) - 1); i++) \ 1243 x[i].mdata = (void *)y; \ 1244 } while (0) 1245 1246 rv = compat_getstate(&st); 1247 if (rv != 0) 1248 return (NS_UNAVAIL); 1249 switch ((enum constants)mdata) { 1250 case SETGRENT: 1251 stayopen = va_arg(ap, int); 1252 if (st->fp != NULL) 1253 rewind(st->fp); 1254 else if (stayopen) 1255 st->fp = fopen(_PATH_GROUP, "re"); 1256 set_setent(dtab, mdata); 1257 (void)_nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "setgrent", 1258 compatsrc, 0); 1259 break; 1260 case ENDGRENT: 1261 if (st->fp != NULL) { 1262 fclose(st->fp); 1263 st->fp = NULL; 1264 } 1265 set_setent(dtab, mdata); 1266 (void)_nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "endgrent", 1267 compatsrc, 0); 1268 break; 1269 default: 1270 break; 1271 } 1272 st->compat = COMPAT_MODE_OFF; 1273 free(st->name); 1274 st->name = NULL; 1275 return (NS_UNAVAIL); 1276 #undef set_setent 1277 } 1278 1279 1280 static int 1281 compat_group(void *retval, void *mdata, va_list ap) 1282 { 1283 static const ns_src compatsrc[] = { 1284 #ifdef YP 1285 { NSSRC_NIS, NS_SUCCESS }, 1286 #endif 1287 { NULL, 0 } 1288 }; 1289 ns_dtab dtab[] = { 1290 #ifdef YP 1291 { NSSRC_NIS, nis_group, NULL }, 1292 #endif 1293 #ifdef HESIOD 1294 { NSSRC_DNS, dns_group, NULL }, 1295 #endif 1296 { NULL, NULL, NULL } 1297 }; 1298 struct compat_state *st; 1299 enum nss_lookup_type how; 1300 const char *name, *line; 1301 struct group *grp; 1302 gid_t gid; 1303 char *buffer, *p; 1304 void *discard; 1305 size_t bufsize, linesize; 1306 off_t pos; 1307 int rv, stayopen, *errnop; 1308 1309 #define set_lookup_type(x, y) do { \ 1310 int i; \ 1311 for (i = 0; i < (int)(nitems(x) - 1); i++) \ 1312 x[i].mdata = (void *)y; \ 1313 } while (0) 1314 1315 name = NULL; 1316 gid = (gid_t)-1; 1317 how = (enum nss_lookup_type)mdata; 1318 switch (how) { 1319 case nss_lt_name: 1320 name = va_arg(ap, const char *); 1321 break; 1322 case nss_lt_id: 1323 gid = va_arg(ap, gid_t); 1324 break; 1325 case nss_lt_all: 1326 break; 1327 default: 1328 return (NS_NOTFOUND); 1329 } 1330 grp = va_arg(ap, struct group *); 1331 buffer = va_arg(ap, char *); 1332 bufsize = va_arg(ap, size_t); 1333 errnop = va_arg(ap, int *); 1334 *errnop = compat_getstate(&st); 1335 if (*errnop != 0) 1336 return (NS_UNAVAIL); 1337 if (st->fp == NULL && 1338 ((st->fp = fopen(_PATH_GROUP, "re")) == NULL)) { 1339 *errnop = errno; 1340 rv = NS_UNAVAIL; 1341 goto fin; 1342 } 1343 if (how == nss_lt_all) 1344 stayopen = 1; 1345 else { 1346 rewind(st->fp); 1347 stayopen = st->stayopen; 1348 } 1349 docompat: 1350 switch (st->compat) { 1351 case COMPAT_MODE_ALL: 1352 set_lookup_type(dtab, how); 1353 switch (how) { 1354 case nss_lt_all: 1355 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT, 1356 "getgrent_r", compatsrc, grp, buffer, bufsize, 1357 errnop); 1358 break; 1359 case nss_lt_id: 1360 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT, 1361 "getgrgid_r", compatsrc, gid, grp, buffer, bufsize, 1362 errnop); 1363 break; 1364 case nss_lt_name: 1365 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT, 1366 "getgrnam_r", compatsrc, name, grp, buffer, 1367 bufsize, errnop); 1368 break; 1369 } 1370 if (rv & NS_TERMINATE) 1371 goto fin; 1372 st->compat = COMPAT_MODE_OFF; 1373 break; 1374 case COMPAT_MODE_NAME: 1375 set_lookup_type(dtab, nss_lt_name); 1376 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT, 1377 "getgrnam_r", compatsrc, st->name, grp, buffer, bufsize, 1378 errnop); 1379 switch (rv) { 1380 case NS_SUCCESS: 1381 switch (how) { 1382 case nss_lt_name: 1383 if (strcmp(name, grp->gr_name) != 0) 1384 rv = NS_NOTFOUND; 1385 break; 1386 case nss_lt_id: 1387 if (gid != grp->gr_gid) 1388 rv = NS_NOTFOUND; 1389 break; 1390 default: 1391 break; 1392 } 1393 break; 1394 case NS_RETURN: 1395 goto fin; 1396 default: 1397 break; 1398 } 1399 free(st->name); 1400 st->name = NULL; 1401 st->compat = COMPAT_MODE_OFF; 1402 if (rv == NS_SUCCESS) 1403 goto fin; 1404 break; 1405 default: 1406 break; 1407 } 1408 rv = NS_NOTFOUND; 1409 pos = ftello(st->fp); 1410 while ((line = fgetln(st->fp, &linesize)) != NULL) { 1411 if (line[linesize-1] == '\n') 1412 linesize--; 1413 if (linesize > 2 && line[0] == '+') { 1414 p = memchr(&line[1], ':', linesize); 1415 if (p == NULL || p == &line[1]) 1416 st->compat = COMPAT_MODE_ALL; 1417 else { 1418 st->name = malloc(p - line); 1419 if (st->name == NULL) { 1420 syslog(LOG_ERR, 1421 "getgrent memory allocation failure"); 1422 *errnop = ENOMEM; 1423 rv = NS_UNAVAIL; 1424 break; 1425 } 1426 memcpy(st->name, &line[1], p - line - 1); 1427 st->name[p - line - 1] = '\0'; 1428 st->compat = COMPAT_MODE_NAME; 1429 } 1430 goto docompat; 1431 } 1432 rv = __gr_match_entry(line, linesize, how, name, gid); 1433 if (rv != NS_SUCCESS) 1434 continue; 1435 /* We need room at least for the line, a string NUL 1436 * terminator, alignment padding, and one (char *) 1437 * pointer for the member list terminator. 1438 */ 1439 if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) { 1440 *errnop = ERANGE; 1441 rv = NS_RETURN; 1442 break; 1443 } 1444 memcpy(buffer, line, linesize); 1445 buffer[linesize] = '\0'; 1446 rv = __gr_parse_entry(buffer, linesize, grp, 1447 &buffer[linesize + 1], bufsize - linesize - 1, errnop); 1448 if (rv & NS_TERMINATE) 1449 break; 1450 pos = ftello(st->fp); 1451 } 1452 fin: 1453 if (st->fp != NULL && !stayopen) { 1454 fclose(st->fp); 1455 st->fp = NULL; 1456 } 1457 if (rv == NS_SUCCESS && retval != NULL) 1458 *(struct group **)retval = grp; 1459 else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL) 1460 fseeko(st->fp, pos, SEEK_SET); 1461 return (rv); 1462 #undef set_lookup_type 1463 } 1464 1465 1466 /* 1467 * common group line matching and parsing 1468 */ 1469 int 1470 __gr_match_entry(const char *line, size_t linesize, enum nss_lookup_type how, 1471 const char *name, gid_t gid) 1472 { 1473 size_t namesize; 1474 const char *p, *eol; 1475 char *q; 1476 unsigned long n; 1477 int i, needed; 1478 1479 if (linesize == 0 || is_comment_line(line, linesize)) 1480 return (NS_NOTFOUND); 1481 switch (how) { 1482 case nss_lt_name: needed = 1; break; 1483 case nss_lt_id: needed = 2; break; 1484 default: needed = 2; break; 1485 } 1486 eol = &line[linesize]; 1487 for (p = line, i = 0; i < needed && p < eol; p++) 1488 if (*p == ':') 1489 i++; 1490 if (i < needed) 1491 return (NS_NOTFOUND); 1492 switch (how) { 1493 case nss_lt_name: 1494 namesize = strlen(name); 1495 if (namesize + 1 == (size_t)(p - line) && 1496 memcmp(line, name, namesize) == 0) 1497 return (NS_SUCCESS); 1498 break; 1499 case nss_lt_id: 1500 n = strtoul(p, &q, 10); 1501 if (q < eol && *q == ':' && gid == (gid_t)n) 1502 return (NS_SUCCESS); 1503 break; 1504 case nss_lt_all: 1505 return (NS_SUCCESS); 1506 default: 1507 break; 1508 } 1509 return (NS_NOTFOUND); 1510 } 1511 1512 1513 int 1514 __gr_parse_entry(char *line, size_t linesize, struct group *grp, char *membuf, 1515 size_t membufsize, int *errnop) 1516 { 1517 char *s_gid, *s_mem, *p, **members; 1518 unsigned long n; 1519 int maxmembers; 1520 1521 memset(grp, 0, sizeof(*grp)); 1522 members = (char **)_ALIGN(membuf); 1523 membufsize -= (char *)members - membuf; 1524 maxmembers = membufsize / sizeof(*members); 1525 if (maxmembers <= 0 || 1526 (grp->gr_name = strsep(&line, ":")) == NULL || 1527 grp->gr_name[0] == '\0' || 1528 (grp->gr_passwd = strsep(&line, ":")) == NULL || 1529 (s_gid = strsep(&line, ":")) == NULL || 1530 s_gid[0] == '\0') 1531 return (NS_NOTFOUND); 1532 s_mem = line; 1533 n = strtoul(s_gid, &s_gid, 10); 1534 if (s_gid[0] != '\0') 1535 return (NS_NOTFOUND); 1536 grp->gr_gid = (gid_t)n; 1537 grp->gr_mem = members; 1538 while (maxmembers > 1 && s_mem != NULL) { 1539 p = strsep(&s_mem, ","); 1540 if (p != NULL && *p != '\0') { 1541 *members++ = p; 1542 maxmembers--; 1543 } 1544 } 1545 *members = NULL; 1546 if (s_mem == NULL) 1547 return (NS_SUCCESS); 1548 else { 1549 *errnop = ERANGE; 1550 return (NS_RETURN); 1551 } 1552 } 1553 1554 1555