1 /* $NetBSD: getgrent.c,v 1.63 2011/06/09 05:11:17 sjg Exp $ */ 2 3 /*- 4 * Copyright (c) 1999-2000, 2004-2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 */ 60 61 /* 62 * Portions Copyright (c) 1994, Jason Downs. All Rights Reserved. 63 * 64 * Redistribution and use in source and binary forms, with or without 65 * modification, are permitted provided that the following conditions 66 * are met: 67 * 1. Redistributions of source code must retain the above copyright 68 * notice, this list of conditions and the following disclaimer. 69 * 2. Redistributions in binary form must reproduce the above copyright 70 * notice, this list of conditions and the following disclaimer in the 71 * documentation and/or other materials provided with the distribution. 72 * 73 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS 74 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 75 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 76 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, 77 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 78 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 79 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 80 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 81 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 82 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 83 * SUCH DAMAGE. 84 */ 85 86 #include <sys/cdefs.h> 87 #if defined(LIBC_SCCS) && !defined(lint) 88 #if 0 89 static char sccsid[] = "@(#)getgrent.c 8.2 (Berkeley) 3/21/94"; 90 #else 91 __RCSID("$NetBSD: getgrent.c,v 1.63 2011/06/09 05:11:17 sjg Exp $"); 92 #endif 93 #endif /* LIBC_SCCS and not lint */ 94 95 #include "namespace.h" 96 #include "reentrant.h" 97 98 #include <sys/param.h> 99 100 #include <assert.h> 101 #include <errno.h> 102 #include <grp.h> 103 #include <limits.h> 104 #include <nsswitch.h> 105 #include <stdarg.h> 106 #include <stdio.h> 107 #include <stdlib.h> 108 #include <string.h> 109 #include <syslog.h> 110 111 #ifdef HESIOD 112 #include <hesiod.h> 113 #endif 114 115 #ifdef YP 116 #include <rpc/rpc.h> 117 #include <rpcsvc/yp_prot.h> 118 #include <rpcsvc/ypclnt.h> 119 #endif 120 121 #include "gr_private.h" 122 123 #ifdef __weak_alias 124 __weak_alias(endgrent,_endgrent) 125 __weak_alias(getgrent,_getgrent) 126 __weak_alias(getgrent_r,_getgrent_r) 127 __weak_alias(getgrgid,_getgrgid) 128 __weak_alias(getgrgid_r,_getgrgid_r) 129 __weak_alias(getgrnam,_getgrnam) 130 __weak_alias(getgrnam_r,_getgrnam_r) 131 __weak_alias(setgrent,_setgrent) 132 __weak_alias(setgroupent,_setgroupent) 133 #endif 134 135 #ifdef _REENTRANT 136 mutex_t __grmutex = MUTEX_INITIALIZER; 137 #endif 138 139 /* 140 * _gr_memfrombuf 141 * Obtain want bytes from buffer (of size buflen) and return a pointer 142 * to the available memory after adjusting buffer/buflen. 143 * Returns NULL if there is insufficient space. 144 */ 145 static char * 146 _gr_memfrombuf(size_t want, char **buffer, size_t *buflen) 147 { 148 char *rv; 149 150 if (want > *buflen) { 151 errno = ERANGE; 152 return NULL; 153 } 154 rv = *buffer; 155 *buffer += want; 156 *buflen -= want; 157 return rv; 158 } 159 160 /* 161 * _gr_parse 162 * Parses entry as a line per group(5) (without the trailing \n) 163 * and fills in grp with corresponding values; memory for strings 164 * and arrays will be allocated from buf (of size buflen). 165 * Returns 1 if parsed successfully, 0 on parse failure. 166 */ 167 static int 168 _gr_parse(const char *entry, struct group *grp, char *buf, size_t buflen) 169 { 170 unsigned long id; 171 const char *bp; 172 char *ep; 173 size_t count; 174 int memc; 175 176 _DIAGASSERT(entry != NULL); 177 _DIAGASSERT(grp != NULL); 178 _DIAGASSERT(buf != NULL); 179 180 #define COPYTOBUF(to) \ 181 do { \ 182 (to) = _gr_memfrombuf(count+1, &buf, &buflen); \ 183 if ((to) == NULL) \ 184 return 0; \ 185 memmove((to), entry, count); \ 186 to[count] = '\0'; \ 187 } while (0) /* LINTED */ 188 189 #if 0 190 if (*entry == '+') /* fail on compat `+' token */ 191 return 0; 192 #endif 193 194 count = strcspn(entry, ":"); /* parse gr_name */ 195 if (entry[count] == '\0') 196 return 0; 197 COPYTOBUF(grp->gr_name); 198 entry += count + 1; 199 200 count = strcspn(entry, ":"); /* parse gr_passwd */ 201 if (entry[count] == '\0') 202 return 0; 203 COPYTOBUF(grp->gr_passwd); 204 entry += count + 1; 205 206 count = strcspn(entry, ":"); /* parse gr_gid */ 207 if (entry[count] == '\0') 208 return 0; 209 id = strtoul(entry, &ep, 10); 210 if (id > GID_MAX || *ep != ':') 211 return 0; 212 grp->gr_gid = (gid_t)id; 213 entry += count + 1; 214 215 memc = 1; /* for final NULL */ 216 if (*entry != '\0') 217 memc++; /* for first item */ 218 for (bp = entry; *bp != '\0'; bp++) { 219 if (*bp == ',') 220 memc++; 221 } 222 /* grab ALIGNed char **gr_mem from buf */ 223 ep = _gr_memfrombuf(memc * sizeof(char *) + ALIGNBYTES, &buf, &buflen); 224 grp->gr_mem = (char **)ALIGN(ep); 225 if (grp->gr_mem == NULL) 226 return 0; 227 228 for (memc = 0; *entry != '\0'; memc++) { 229 count = strcspn(entry, ","); /* parse member */ 230 COPYTOBUF(grp->gr_mem[memc]); 231 entry += count; 232 if (*entry == ',') 233 entry++; 234 } 235 236 #undef COPYTOBUF 237 238 grp->gr_mem[memc] = NULL; 239 return 1; 240 } 241 242 /* 243 * _gr_copy 244 * Copy the contents of fromgrp to grp; memory for strings 245 * and arrays will be allocated from buf (of size buflen). 246 * Returns 1 if copied successfully, 0 on copy failure. 247 * NOTE: fromgrp must not use buf for its own pointers. 248 */ 249 static int 250 _gr_copy(struct group *fromgrp, struct group *grp, char *buf, size_t buflen) 251 { 252 char *ep; 253 int memc; 254 255 _DIAGASSERT(fromgrp != NULL); 256 _DIAGASSERT(grp != NULL); 257 _DIAGASSERT(buf != NULL); 258 259 #define COPYSTR(to, from) \ 260 do { \ 261 size_t count = strlen((from)); \ 262 (to) = _gr_memfrombuf(count+1, &buf, &buflen); \ 263 if ((to) == NULL) \ 264 return 0; \ 265 memmove((to), (from), count); \ 266 to[count] = '\0'; \ 267 } while (0) /* LINTED */ 268 269 COPYSTR(grp->gr_name, fromgrp->gr_name); 270 COPYSTR(grp->gr_passwd, fromgrp->gr_passwd); 271 grp->gr_gid = fromgrp->gr_gid; 272 273 if (fromgrp->gr_mem == NULL) 274 return 0; 275 276 for (memc = 0; fromgrp->gr_mem[memc]; memc++) 277 continue; 278 memc++; /* for final NULL */ 279 280 /* grab ALIGNed char **gr_mem from buf */ 281 ep = _gr_memfrombuf(memc * sizeof(char *) + ALIGNBYTES, &buf, &buflen); 282 grp->gr_mem = (char **)ALIGN(ep); 283 if (grp->gr_mem == NULL) 284 return 0; 285 286 for (memc = 0; fromgrp->gr_mem[memc]; memc++) { 287 COPYSTR(grp->gr_mem[memc], fromgrp->gr_mem[memc]); 288 } 289 290 #undef COPYSTR 291 292 grp->gr_mem[memc] = NULL; 293 return 1; 294 } 295 296 /* 297 * files methods 298 */ 299 300 int 301 __grstart_files(struct __grstate_files *state) 302 { 303 304 _DIAGASSERT(state != NULL); 305 306 if (state->fp == NULL) { 307 state->fp = fopen(_PATH_GROUP, "r"); 308 if (state->fp == NULL) 309 return NS_UNAVAIL; 310 } else { 311 rewind(state->fp); 312 } 313 return NS_SUCCESS; 314 } 315 316 int 317 __grend_files(struct __grstate_files *state) 318 { 319 320 _DIAGASSERT(state != NULL); 321 322 if (state->fp) { 323 (void) fclose(state->fp); 324 state->fp = NULL; 325 } 326 return NS_SUCCESS; 327 } 328 329 /* 330 * __grscan_files 331 * Scan state->fp for the next desired entry. 332 * If search is zero, return the next entry. 333 * If search is non-zero, look for a specific name (if name != NULL), 334 * or a specific gid (if name == NULL). 335 * Sets *retval to the errno if the result is not NS_SUCCESS 336 * or NS_NOTFOUND. 337 */ 338 int 339 __grscan_files(int *retval, struct group *grp, char *buffer, size_t buflen, 340 struct __grstate_files *state, int search, const char *name, gid_t gid) 341 { 342 int rv; 343 char filebuf[_GETGR_R_SIZE_MAX], *ep; 344 345 _DIAGASSERT(retval != NULL); 346 _DIAGASSERT(grp != NULL); 347 _DIAGASSERT(buffer != NULL); 348 _DIAGASSERT(state != NULL); 349 /* name is NULL to indicate searching for gid */ 350 351 *retval = 0; 352 353 if (state->fp == NULL) { /* only start if file not open yet */ 354 rv = __grstart_files(state); 355 if (rv != NS_SUCCESS) 356 goto filesgrscan_out; 357 } 358 359 rv = NS_NOTFOUND; 360 361 /* scan line by line */ 362 while (fgets(filebuf, sizeof(filebuf), state->fp) != NULL) { 363 ep = strchr(filebuf, '\n'); 364 if (ep == NULL) { /* skip lines that are too big */ 365 int ch; 366 367 while ((ch = getc(state->fp)) != '\n' && ch != EOF) 368 continue; 369 continue; 370 } 371 *ep = '\0'; /* clear trailing \n */ 372 373 if (filebuf[0] == '+') /* skip compat line */ 374 continue; 375 376 /* validate line */ 377 if (! _gr_parse(filebuf, grp, buffer, buflen)) { 378 continue; /* skip bad lines */ 379 } 380 if (! search) { /* just want this one */ 381 rv = NS_SUCCESS; 382 break; 383 } 384 /* want specific */ 385 if ((name && strcmp(name, grp->gr_name) == 0) || 386 (!name && gid == grp->gr_gid)) { 387 rv = NS_SUCCESS; 388 break; 389 } 390 } 391 392 filesgrscan_out: 393 if (rv != NS_SUCCESS && rv != NS_NOTFOUND) 394 *retval = errno; 395 return rv; 396 } 397 398 399 static struct __grstate_files _files_state; 400 /* storage for non _r functions */ 401 static struct group _files_group; 402 static char _files_groupbuf[_GETGR_R_SIZE_MAX]; 403 404 /*ARGSUSED*/ 405 static int 406 _files_setgrent(void *nsrv, void *nscb, va_list ap) 407 { 408 409 _files_state.stayopen = 0; 410 return __grstart_files(&_files_state); 411 } 412 413 /*ARGSUSED*/ 414 static int 415 _files_setgroupent(void *nsrv, void *nscb, va_list ap) 416 { 417 int *retval = va_arg(ap, int *); 418 int stayopen = va_arg(ap, int); 419 420 int rv; 421 422 _files_state.stayopen = stayopen; 423 rv = __grstart_files(&_files_state); 424 *retval = (rv == NS_SUCCESS); 425 return rv; 426 } 427 428 /*ARGSUSED*/ 429 static int 430 _files_endgrent(void *nsrv, void *nscb, va_list ap) 431 { 432 433 _files_state.stayopen = 0; 434 return __grend_files(&_files_state); 435 } 436 437 /*ARGSUSED*/ 438 static int 439 _files_getgrent(void *nsrv, void *nscb, va_list ap) 440 { 441 struct group **retval = va_arg(ap, struct group **); 442 443 int rv, rerror; 444 445 _DIAGASSERT(retval != NULL); 446 447 *retval = NULL; 448 rv = __grscan_files(&rerror, &_files_group, 449 _files_groupbuf, sizeof(_files_groupbuf), 450 &_files_state, 0, NULL, 0); 451 if (rv == NS_SUCCESS) 452 *retval = &_files_group; 453 return rv; 454 } 455 456 /*ARGSUSED*/ 457 static int 458 _files_getgrent_r(void *nsrv, void *nscb, va_list ap) 459 { 460 int *retval = va_arg(ap, int *); 461 struct group *grp = va_arg(ap, struct group *); 462 char *buffer = va_arg(ap, char *); 463 size_t buflen = va_arg(ap, size_t); 464 struct group **result = va_arg(ap, struct group **); 465 466 int rv; 467 468 _DIAGASSERT(retval != NULL); 469 _DIAGASSERT(grp != NULL); 470 _DIAGASSERT(buffer != NULL); 471 _DIAGASSERT(result != NULL); 472 473 rv = __grscan_files(retval, grp, buffer, buflen, 474 &_files_state, 0, NULL, 0); 475 if (rv == NS_SUCCESS) 476 *result = grp; 477 else 478 *result = NULL; 479 return rv; 480 } 481 482 /*ARGSUSED*/ 483 static int 484 _files_getgrgid(void *nsrv, void *nscb, va_list ap) 485 { 486 struct group **retval = va_arg(ap, struct group **); 487 gid_t gid = va_arg(ap, gid_t); 488 489 int rv, rerror; 490 491 _DIAGASSERT(retval != NULL); 492 493 *retval = NULL; 494 rv = __grstart_files(&_files_state); 495 if (rv != NS_SUCCESS) 496 return rv; 497 rv = __grscan_files(&rerror, &_files_group, 498 _files_groupbuf, sizeof(_files_groupbuf), 499 &_files_state, 1, NULL, gid); 500 if (!_files_state.stayopen) 501 __grend_files(&_files_state); 502 if (rv == NS_SUCCESS) 503 *retval = &_files_group; 504 return rv; 505 } 506 507 /*ARGSUSED*/ 508 static int 509 _files_getgrgid_r(void *nsrv, void *nscb, va_list ap) 510 { 511 int *retval = va_arg(ap, int *); 512 gid_t gid = va_arg(ap, gid_t); 513 struct group *grp = va_arg(ap, struct group *); 514 char *buffer = va_arg(ap, char *); 515 size_t buflen = va_arg(ap, size_t); 516 struct group **result = va_arg(ap, struct group **); 517 518 struct __grstate_files state; 519 int rv; 520 521 _DIAGASSERT(retval != NULL); 522 _DIAGASSERT(grp != NULL); 523 _DIAGASSERT(buffer != NULL); 524 _DIAGASSERT(result != NULL); 525 526 *result = NULL; 527 memset(&state, 0, sizeof(state)); 528 rv = __grscan_files(retval, grp, buffer, buflen, &state, 1, NULL, gid); 529 __grend_files(&state); 530 if (rv == NS_SUCCESS) 531 *result = grp; 532 return rv; 533 } 534 535 /*ARGSUSED*/ 536 static int 537 _files_getgrnam(void *nsrv, void *nscb, va_list ap) 538 { 539 struct group **retval = va_arg(ap, struct group **); 540 const char *name = va_arg(ap, const char *); 541 542 int rv, rerror; 543 544 _DIAGASSERT(retval != NULL); 545 546 *retval = NULL; 547 rv = __grstart_files(&_files_state); 548 if (rv != NS_SUCCESS) 549 return rv; 550 rv = __grscan_files(&rerror, &_files_group, 551 _files_groupbuf, sizeof(_files_groupbuf), 552 &_files_state, 1, name, 0); 553 if (!_files_state.stayopen) 554 __grend_files(&_files_state); 555 if (rv == NS_SUCCESS) 556 *retval = &_files_group; 557 return rv; 558 } 559 560 /*ARGSUSED*/ 561 static int 562 _files_getgrnam_r(void *nsrv, void *nscb, va_list ap) 563 { 564 int *retval = va_arg(ap, int *); 565 const char *name = va_arg(ap, const char *); 566 struct group *grp = va_arg(ap, struct group *); 567 char *buffer = va_arg(ap, char *); 568 size_t buflen = va_arg(ap, size_t); 569 struct group **result = va_arg(ap, struct group **); 570 571 struct __grstate_files state; 572 int rv; 573 574 _DIAGASSERT(retval != NULL); 575 _DIAGASSERT(grp != NULL); 576 _DIAGASSERT(buffer != NULL); 577 _DIAGASSERT(result != NULL); 578 579 *result = NULL; 580 memset(&state, 0, sizeof(state)); 581 rv = __grscan_files(retval, grp, buffer, buflen, &state, 1, name, 0); 582 __grend_files(&state); 583 if (rv == NS_SUCCESS) 584 *result = grp; 585 return rv; 586 } 587 588 589 #ifdef HESIOD 590 /* 591 * dns methods 592 */ 593 594 int 595 __grstart_dns(struct __grstate_dns *state) 596 { 597 598 _DIAGASSERT(state != NULL); 599 600 state->num = 0; 601 if (state->context == NULL) { /* setup Hesiod */ 602 if (hesiod_init(&state->context) == -1) 603 return NS_UNAVAIL; 604 } 605 606 return NS_SUCCESS; 607 } 608 609 int 610 __grend_dns(struct __grstate_dns *state) 611 { 612 613 _DIAGASSERT(state != NULL); 614 615 state->num = 0; 616 if (state->context) { 617 hesiod_end(state->context); 618 state->context = NULL; 619 } 620 return NS_SUCCESS; 621 } 622 623 /* 624 * __grscan_dns 625 * Search Hesiod for the next desired entry. 626 * If search is zero, return the next entry. 627 * If search is non-zero, look for a specific name (if name != NULL), 628 * or a specific gid (if name == NULL). 629 */ 630 int 631 __grscan_dns(int *retval, struct group *grp, char *buffer, size_t buflen, 632 struct __grstate_dns *state, int search, const char *name, gid_t gid) 633 { 634 const char **curzone; 635 char **hp, *ep; 636 int rv; 637 638 static const char *zones_gid_group[] = { 639 "gid", 640 "group", 641 NULL 642 }; 643 644 static const char *zones_group[] = { 645 "group", 646 NULL 647 }; 648 649 _DIAGASSERT(retval != NULL); 650 _DIAGASSERT(grp != NULL); 651 _DIAGASSERT(buffer != NULL); 652 _DIAGASSERT(state != NULL); 653 /* name is NULL to indicate searching for gid */ 654 655 *retval = 0; 656 657 if (state->context == NULL) { /* only start if Hesiod not setup */ 658 rv = __grstart_dns(state); 659 if (rv != NS_SUCCESS) 660 return rv; 661 } 662 663 next_dns_entry: 664 hp = NULL; 665 rv = NS_NOTFOUND; 666 667 if (! search) { /* find next entry */ 668 if (state->num == -1) /* exhausted search */ 669 return NS_NOTFOUND; 670 /* find group-NNN */ 671 snprintf(buffer, buflen, "group-%u", state->num); 672 state->num++; 673 curzone = zones_group; 674 } else if (name) { /* find group name */ 675 snprintf(buffer, buflen, "%s", name); 676 curzone = zones_group; 677 } else { /* find gid */ 678 snprintf(buffer, buflen, "%u", (unsigned int)gid); 679 curzone = zones_gid_group; 680 } 681 682 for (; *curzone; curzone++) { /* search zones */ 683 hp = hesiod_resolve(state->context, buffer, *curzone); 684 if (hp != NULL) 685 break; 686 if (errno != ENOENT) { 687 rv = NS_UNAVAIL; 688 goto dnsgrscan_out; 689 } 690 } 691 if (*curzone == NULL) { 692 if (! search) 693 state->num = -1; 694 goto dnsgrscan_out; 695 } 696 697 if ((ep = strchr(hp[0], '\n')) != NULL) 698 *ep = '\0'; /* clear trailing \n */ 699 if (_gr_parse(hp[0], grp, buffer, buflen)) { /* validate line */ 700 if (! search) { /* just want this one */ 701 rv = NS_SUCCESS; 702 } else if ((name && strcmp(name, grp->gr_name) == 0) || 703 (!name && gid == grp->gr_gid)) { /* want specific */ 704 rv = NS_SUCCESS; 705 } 706 } else { /* dodgy entry */ 707 if (!search) { /* try again if ! searching */ 708 hesiod_free_list(state->context, hp); 709 goto next_dns_entry; 710 } 711 } 712 713 dnsgrscan_out: 714 if (rv != NS_SUCCESS && rv != NS_NOTFOUND) 715 *retval = errno; 716 if (hp) 717 hesiod_free_list(state->context, hp); 718 return rv; 719 } 720 721 static struct __grstate_dns _dns_state; 722 /* storage for non _r functions */ 723 static struct group _dns_group; 724 static char _dns_groupbuf[_GETGR_R_SIZE_MAX]; 725 726 /*ARGSUSED*/ 727 static int 728 _dns_setgrent(void *nsrv, void *nscb, va_list ap) 729 { 730 731 _dns_state.stayopen = 0; 732 return __grstart_dns(&_dns_state); 733 } 734 735 /*ARGSUSED*/ 736 static int 737 _dns_setgroupent(void *nsrv, void *nscb, va_list ap) 738 { 739 int *retval = va_arg(ap, int *); 740 int stayopen = va_arg(ap, int); 741 742 int rv; 743 744 _dns_state.stayopen = stayopen; 745 rv = __grstart_dns(&_dns_state); 746 *retval = (rv == NS_SUCCESS); 747 return rv; 748 } 749 750 /*ARGSUSED*/ 751 static int 752 _dns_endgrent(void *nsrv, void *nscb, va_list ap) 753 { 754 755 _dns_state.stayopen = 0; 756 return __grend_dns(&_dns_state); 757 } 758 759 /*ARGSUSED*/ 760 static int 761 _dns_getgrent(void *nsrv, void *nscb, va_list ap) 762 { 763 struct group **retval = va_arg(ap, struct group **); 764 765 int rv, rerror; 766 767 _DIAGASSERT(retval != NULL); 768 769 *retval = NULL; 770 rv = __grscan_dns(&rerror, &_dns_group, 771 _dns_groupbuf, sizeof(_dns_groupbuf), &_dns_state, 0, NULL, 0); 772 if (rv == NS_SUCCESS) 773 *retval = &_dns_group; 774 return rv; 775 } 776 777 /*ARGSUSED*/ 778 static int 779 _dns_getgrent_r(void *nsrv, void *nscb, va_list ap) 780 { 781 int *retval = va_arg(ap, int *); 782 struct group *grp = va_arg(ap, struct group *); 783 char *buffer = va_arg(ap, char *); 784 size_t buflen = va_arg(ap, size_t); 785 struct group **result = va_arg(ap, struct group **); 786 787 int rv; 788 789 _DIAGASSERT(retval != NULL); 790 _DIAGASSERT(grp != NULL); 791 _DIAGASSERT(buffer != NULL); 792 _DIAGASSERT(result != NULL); 793 794 rv = __grscan_dns(retval, grp, buffer, buflen, 795 &_dns_state, 0, NULL, 0); 796 if (rv == NS_SUCCESS) 797 *result = grp; 798 else 799 *result = NULL; 800 return rv; 801 } 802 /*ARGSUSED*/ 803 static int 804 _dns_getgrgid(void *nsrv, void *nscb, va_list ap) 805 { 806 struct group **retval = va_arg(ap, struct group **); 807 gid_t gid = va_arg(ap, gid_t); 808 809 int rv, rerror; 810 811 _DIAGASSERT(retval != NULL); 812 813 *retval = NULL; 814 rv = __grstart_dns(&_dns_state); 815 if (rv != NS_SUCCESS) 816 return rv; 817 rv = __grscan_dns(&rerror, &_dns_group, 818 _dns_groupbuf, sizeof(_dns_groupbuf), &_dns_state, 1, NULL, gid); 819 if (!_dns_state.stayopen) 820 __grend_dns(&_dns_state); 821 if (rv == NS_SUCCESS) 822 *retval = &_dns_group; 823 return rv; 824 } 825 826 /*ARGSUSED*/ 827 static int 828 _dns_getgrgid_r(void *nsrv, void *nscb, va_list ap) 829 { 830 int *retval = va_arg(ap, int *); 831 gid_t gid = va_arg(ap, gid_t); 832 struct group *grp = va_arg(ap, struct group *); 833 char *buffer = va_arg(ap, char *); 834 size_t buflen = va_arg(ap, size_t); 835 struct group **result = va_arg(ap, struct group **); 836 837 struct __grstate_dns state; 838 int rv; 839 840 _DIAGASSERT(retval != NULL); 841 _DIAGASSERT(grp != NULL); 842 _DIAGASSERT(buffer != NULL); 843 _DIAGASSERT(result != NULL); 844 845 *result = NULL; 846 memset(&state, 0, sizeof(state)); 847 rv = __grscan_dns(retval, grp, buffer, buflen, &state, 1, NULL, gid); 848 __grend_dns(&state); 849 if (rv == NS_SUCCESS) 850 *result = grp; 851 return rv; 852 } 853 854 /*ARGSUSED*/ 855 static int 856 _dns_getgrnam(void *nsrv, void *nscb, va_list ap) 857 { 858 struct group **retval = va_arg(ap, struct group **); 859 const char *name = va_arg(ap, const char *); 860 861 int rv, rerror; 862 863 _DIAGASSERT(retval != NULL); 864 865 *retval = NULL; 866 rv = __grstart_dns(&_dns_state); 867 if (rv != NS_SUCCESS) 868 return rv; 869 rv = __grscan_dns(&rerror, &_dns_group, 870 _dns_groupbuf, sizeof(_dns_groupbuf), &_dns_state, 1, name, 0); 871 if (!_dns_state.stayopen) 872 __grend_dns(&_dns_state); 873 if (rv == NS_SUCCESS) 874 *retval = &_dns_group; 875 return rv; 876 } 877 878 /*ARGSUSED*/ 879 static int 880 _dns_getgrnam_r(void *nsrv, void *nscb, va_list ap) 881 { 882 int *retval = va_arg(ap, int *); 883 const char *name = va_arg(ap, const char *); 884 struct group *grp = va_arg(ap, struct group *); 885 char *buffer = va_arg(ap, char *); 886 size_t buflen = va_arg(ap, size_t); 887 struct group **result = va_arg(ap, struct group **); 888 889 struct __grstate_dns state; 890 int rv; 891 892 _DIAGASSERT(retval != NULL); 893 _DIAGASSERT(grp != NULL); 894 _DIAGASSERT(buffer != NULL); 895 _DIAGASSERT(result != NULL); 896 897 *result = NULL; 898 memset(&state, 0, sizeof(state)); 899 rv = __grscan_dns(retval, grp, buffer, buflen, &state, 1, name, 0); 900 __grend_dns(&state); 901 if (rv == NS_SUCCESS) 902 *result = grp; 903 return rv; 904 } 905 906 #endif /* HESIOD */ 907 908 909 #ifdef YP 910 /* 911 * nis methods 912 */ 913 914 int 915 __grstart_nis(struct __grstate_nis *state) 916 { 917 918 _DIAGASSERT(state != NULL); 919 920 state->done = 0; 921 if (state->current) { 922 free(state->current); 923 state->current = NULL; 924 } 925 if (state->domain == NULL) { /* setup NIS */ 926 switch (yp_get_default_domain(&state->domain)) { 927 case 0: 928 break; 929 case YPERR_RESRC: 930 return NS_TRYAGAIN; 931 default: 932 return NS_UNAVAIL; 933 } 934 } 935 return NS_SUCCESS; 936 } 937 938 int 939 __grend_nis(struct __grstate_nis *state) 940 { 941 942 _DIAGASSERT(state != NULL); 943 944 if (state->domain) { 945 state->domain = NULL; 946 } 947 state->done = 0; 948 if (state->current) { 949 free(state->current); 950 state->current = NULL; 951 } 952 return NS_SUCCESS; 953 } 954 955 /* 956 * __grscan_nis 957 * Search NIS for the next desired entry. 958 * If search is zero, return the next entry. 959 * If search is non-zero, look for a specific name (if name != NULL), 960 * or a specific gid (if name == NULL). 961 */ 962 int 963 __grscan_nis(int *retval, struct group *grp, char *buffer, size_t buflen, 964 struct __grstate_nis *state, int search, const char *name, gid_t gid) 965 { 966 const char *map; 967 char *key, *data; 968 int nisr, rv, keylen, datalen; 969 970 _DIAGASSERT(retval != NULL); 971 _DIAGASSERT(grp != NULL); 972 _DIAGASSERT(buffer != NULL); 973 _DIAGASSERT(state != NULL); 974 /* name is NULL to indicate searching for gid */ 975 976 *retval = 0; 977 978 if (state->domain == NULL) { /* only start if NIS not setup */ 979 rv = __grstart_nis(state); 980 if (rv != NS_SUCCESS) 981 return rv; 982 } 983 984 next_nis_entry: 985 key = NULL; 986 data = NULL; 987 rv = NS_SUCCESS; 988 989 if (! search) { /* find next entry */ 990 if (state->done) /* exhausted search */ 991 return NS_NOTFOUND; 992 map = "group.byname"; 993 if (state->current) { /* already searching */ 994 nisr = yp_next(state->domain, map, 995 state->current, state->currentlen, 996 &key, &keylen, &data, &datalen); 997 free(state->current); 998 state->current = NULL; 999 switch (nisr) { 1000 case 0: 1001 state->current = key; 1002 state->currentlen = keylen; 1003 key = NULL; 1004 break; 1005 case YPERR_NOMORE: 1006 rv = NS_NOTFOUND; 1007 state->done = 1; 1008 break; 1009 default: 1010 rv = NS_UNAVAIL; 1011 break; 1012 } 1013 } else { /* new search */ 1014 if (yp_first(state->domain, map, 1015 &state->current, &state->currentlen, 1016 &data, &datalen)) { 1017 rv = NS_UNAVAIL; 1018 } 1019 } 1020 } else { /* search for specific item */ 1021 if (name) { /* find group name */ 1022 snprintf(buffer, buflen, "%s", name); 1023 map = "group.byname"; 1024 } else { /* find gid */ 1025 snprintf(buffer, buflen, "%u", (unsigned int)gid); 1026 map = "group.bygid"; 1027 } 1028 nisr = yp_match(state->domain, map, buffer, (int)strlen(buffer), 1029 &data, &datalen); 1030 switch (nisr) { 1031 case 0: 1032 break; 1033 case YPERR_KEY: 1034 rv = NS_NOTFOUND; 1035 break; 1036 default: 1037 rv = NS_UNAVAIL; 1038 break; 1039 } 1040 } 1041 if (rv == NS_SUCCESS) { /* validate data */ 1042 data[datalen] = '\0'; /* clear trailing \n */ 1043 if (_gr_parse(data, grp, buffer, buflen)) { 1044 if (! search) { /* just want this one */ 1045 rv = NS_SUCCESS; 1046 } else if ((name && strcmp(name, grp->gr_name) == 0) || 1047 (!name && gid == grp->gr_gid)) { 1048 /* want specific */ 1049 rv = NS_SUCCESS; 1050 } 1051 } else { /* dodgy entry */ 1052 if (!search) { /* try again if ! searching */ 1053 free(data); 1054 goto next_nis_entry; 1055 } 1056 } 1057 } 1058 1059 if (rv != NS_SUCCESS && rv != NS_NOTFOUND) 1060 *retval = errno; 1061 if (key) 1062 free(key); 1063 if (data) 1064 free(data); 1065 return rv; 1066 } 1067 1068 static struct __grstate_nis _nis_state; 1069 /* storage for non _r functions */ 1070 static struct group _nis_group; 1071 static char _nis_groupbuf[_GETGR_R_SIZE_MAX]; 1072 1073 /*ARGSUSED*/ 1074 static int 1075 _nis_setgrent(void *nsrv, void *nscb, va_list ap) 1076 { 1077 1078 _nis_state.stayopen = 0; 1079 return __grstart_nis(&_nis_state); 1080 } 1081 1082 /*ARGSUSED*/ 1083 static int 1084 _nis_setgroupent(void *nsrv, void *nscb, va_list ap) 1085 { 1086 int *retval = va_arg(ap, int *); 1087 int stayopen = va_arg(ap, int); 1088 1089 int rv; 1090 1091 _nis_state.stayopen = stayopen; 1092 rv = __grstart_nis(&_nis_state); 1093 *retval = (rv == NS_SUCCESS); 1094 return rv; 1095 } 1096 1097 /*ARGSUSED*/ 1098 static int 1099 _nis_endgrent(void *nsrv, void *nscb, va_list ap) 1100 { 1101 1102 return __grend_nis(&_nis_state); 1103 } 1104 1105 /*ARGSUSED*/ 1106 static int 1107 _nis_getgrent(void *nsrv, void *nscb, va_list ap) 1108 { 1109 struct group **retval = va_arg(ap, struct group **); 1110 1111 int rv, rerror; 1112 1113 _DIAGASSERT(retval != NULL); 1114 1115 *retval = NULL; 1116 rv = __grscan_nis(&rerror, &_nis_group, 1117 _nis_groupbuf, sizeof(_nis_groupbuf), &_nis_state, 0, NULL, 0); 1118 if (rv == NS_SUCCESS) 1119 *retval = &_nis_group; 1120 return rv; 1121 } 1122 1123 /*ARGSUSED*/ 1124 static int 1125 _nis_getgrent_r(void *nsrv, void *nscb, va_list ap) 1126 { 1127 int *retval = va_arg(ap, int *); 1128 struct group *grp = va_arg(ap, struct group *); 1129 char *buffer = va_arg(ap, char *); 1130 size_t buflen = va_arg(ap, size_t); 1131 struct group **result = va_arg(ap, struct group **); 1132 1133 int rv; 1134 1135 _DIAGASSERT(retval != NULL); 1136 _DIAGASSERT(grp != NULL); 1137 _DIAGASSERT(buffer != NULL); 1138 _DIAGASSERT(result != NULL); 1139 1140 rv = __grscan_nis(retval, grp, buffer, buflen, 1141 &_nis_state, 0, NULL, 0); 1142 if (rv == NS_SUCCESS) 1143 *result = grp; 1144 else 1145 *result = NULL; 1146 return rv; 1147 } 1148 1149 /*ARGSUSED*/ 1150 static int 1151 _nis_getgrgid(void *nsrv, void *nscb, va_list ap) 1152 { 1153 struct group **retval = va_arg(ap, struct group **); 1154 gid_t gid = va_arg(ap, gid_t); 1155 1156 int rv, rerror; 1157 1158 _DIAGASSERT(retval != NULL); 1159 1160 *retval = NULL; 1161 rv = __grstart_nis(&_nis_state); 1162 if (rv != NS_SUCCESS) 1163 return rv; 1164 rv = __grscan_nis(&rerror, &_nis_group, 1165 _nis_groupbuf, sizeof(_nis_groupbuf), &_nis_state, 1, NULL, gid); 1166 if (!_nis_state.stayopen) 1167 __grend_nis(&_nis_state); 1168 if (rv == NS_SUCCESS) 1169 *retval = &_nis_group; 1170 return rv; 1171 } 1172 1173 /*ARGSUSED*/ 1174 static int 1175 _nis_getgrgid_r(void *nsrv, void *nscb, va_list ap) 1176 { 1177 int *retval = va_arg(ap, int *); 1178 gid_t gid = va_arg(ap, gid_t); 1179 struct group *grp = va_arg(ap, struct group *); 1180 char *buffer = va_arg(ap, char *); 1181 size_t buflen = va_arg(ap, size_t); 1182 struct group **result = va_arg(ap, struct group **); 1183 1184 struct __grstate_nis state; 1185 int rv; 1186 1187 _DIAGASSERT(retval != NULL); 1188 _DIAGASSERT(grp != NULL); 1189 _DIAGASSERT(buffer != NULL); 1190 _DIAGASSERT(result != NULL); 1191 1192 *result = NULL; 1193 memset(&state, 0, sizeof(state)); 1194 rv = __grscan_nis(retval, grp, buffer, buflen, &state, 1, NULL, gid); 1195 __grend_nis(&state); 1196 if (rv == NS_SUCCESS) 1197 *result = grp; 1198 return rv; 1199 } 1200 1201 /*ARGSUSED*/ 1202 static int 1203 _nis_getgrnam(void *nsrv, void *nscb, va_list ap) 1204 { 1205 struct group **retval = va_arg(ap, struct group **); 1206 const char *name = va_arg(ap, const char *); 1207 1208 int rv, rerror; 1209 1210 _DIAGASSERT(retval != NULL); 1211 1212 *retval = NULL; 1213 rv = __grstart_nis(&_nis_state); 1214 if (rv != NS_SUCCESS) 1215 return rv; 1216 rv = __grscan_nis(&rerror, &_nis_group, 1217 _nis_groupbuf, sizeof(_nis_groupbuf), &_nis_state, 1, name, 0); 1218 if (!_nis_state.stayopen) 1219 __grend_nis(&_nis_state); 1220 if (rv == NS_SUCCESS) 1221 *retval = &_nis_group; 1222 return rv; 1223 } 1224 1225 /*ARGSUSED*/ 1226 static int 1227 _nis_getgrnam_r(void *nsrv, void *nscb, va_list ap) 1228 { 1229 int *retval = va_arg(ap, int *); 1230 const char *name = va_arg(ap, const char *); 1231 struct group *grp = va_arg(ap, struct group *); 1232 char *buffer = va_arg(ap, char *); 1233 size_t buflen = va_arg(ap, size_t); 1234 struct group **result = va_arg(ap, struct group **); 1235 1236 struct __grstate_nis state; 1237 int rv; 1238 1239 _DIAGASSERT(retval != NULL); 1240 _DIAGASSERT(grp != NULL); 1241 _DIAGASSERT(buffer != NULL); 1242 _DIAGASSERT(result != NULL); 1243 1244 *result = NULL; 1245 memset(&state, 0, sizeof(state)); 1246 rv = __grscan_nis(retval, grp, buffer, buflen, &state, 1, name, 0); 1247 __grend_nis(&state); 1248 if (rv == NS_SUCCESS) 1249 *result = grp; 1250 return rv; 1251 } 1252 1253 #endif /* YP */ 1254 1255 1256 #ifdef _GROUP_COMPAT 1257 /* 1258 * compat methods 1259 */ 1260 1261 int 1262 __grstart_compat(struct __grstate_compat *state) 1263 { 1264 1265 _DIAGASSERT(state != NULL); 1266 1267 if (state->fp == NULL) { 1268 state->fp = fopen(_PATH_GROUP, "r"); 1269 if (state->fp == NULL) 1270 return NS_UNAVAIL; 1271 } else { 1272 rewind(state->fp); 1273 } 1274 return NS_SUCCESS; 1275 } 1276 1277 int 1278 __grend_compat(struct __grstate_compat *state) 1279 { 1280 1281 _DIAGASSERT(state != NULL); 1282 1283 if (state->name) { 1284 free(state->name); 1285 state->name = NULL; 1286 } 1287 if (state->fp) { 1288 (void) fclose(state->fp); 1289 state->fp = NULL; 1290 } 1291 return NS_SUCCESS; 1292 } 1293 1294 1295 /* 1296 * __grbad_compat 1297 * log an error if "files" or "compat" is specified in 1298 * group_compat database 1299 */ 1300 /*ARGSUSED*/ 1301 int 1302 __grbad_compat(void *nsrv, void *nscb, va_list ap) 1303 { 1304 static int warned; 1305 1306 _DIAGASSERT(nsrv != NULL); 1307 _DIAGASSERT(nscb != NULL); 1308 1309 if (!warned) { 1310 syslog(LOG_ERR, 1311 "nsswitch.conf group_compat database can't use '%s'", 1312 (const char *)nscb); 1313 } 1314 warned = 1; 1315 return NS_UNAVAIL; 1316 } 1317 1318 /* 1319 * __grscan_compat 1320 * Scan state->fp for the next desired entry. 1321 * If search is zero, return the next entry. 1322 * If search is non-zero, look for a specific name (if name != NULL), 1323 * or a specific gid (if name == NULL). 1324 * Sets *retval to the errno if the result is not NS_SUCCESS or 1325 * NS_NOTFOUND. 1326 * 1327 * searchfunc is invoked when a compat "+" lookup is required; 1328 * searchcookie is passed as the first argument to searchfunc, 1329 * the second argument is the group result. 1330 * This should return NS_NOTFOUND when "no more groups" from compat src. 1331 * If searchfunc is NULL then nsdispatch of getgrent is used. 1332 * This is primarily intended for getgroupmembership(3)'s compat backend. 1333 */ 1334 int 1335 __grscan_compat(int *retval, struct group *grp, char *buffer, size_t buflen, 1336 struct __grstate_compat *state, int search, const char *name, gid_t gid, 1337 int (*searchfunc)(void *, struct group **), void *searchcookie) 1338 { 1339 int rv; 1340 char filebuf[_GETGR_R_SIZE_MAX], *ep; 1341 1342 static const ns_dtab compatentdtab[] = { 1343 NS_FILES_CB(__grbad_compat, "files") 1344 NS_DNS_CB(_dns_getgrent_r, NULL) 1345 NS_NIS_CB(_nis_getgrent_r, NULL) 1346 NS_COMPAT_CB(__grbad_compat, "compat") 1347 NS_NULL_CB 1348 }; 1349 static const ns_dtab compatgiddtab[] = { 1350 NS_FILES_CB(__grbad_compat, "files") 1351 NS_DNS_CB(_dns_getgrgid_r, NULL) 1352 NS_NIS_CB(_nis_getgrgid_r, NULL) 1353 NS_COMPAT_CB(__grbad_compat, "compat") 1354 NS_NULL_CB 1355 }; 1356 static const ns_dtab compatnamdtab[] = { 1357 NS_FILES_CB(__grbad_compat, "files") 1358 NS_DNS_CB(_dns_getgrnam_r, NULL) 1359 NS_NIS_CB(_nis_getgrnam_r, NULL) 1360 NS_COMPAT_CB(__grbad_compat, "compat") 1361 NS_NULL_CB 1362 }; 1363 1364 _DIAGASSERT(retval != NULL); 1365 _DIAGASSERT(grp != NULL); 1366 _DIAGASSERT(buffer != NULL); 1367 _DIAGASSERT(state != NULL); 1368 /* name is NULL to indicate searching for gid */ 1369 1370 *retval = 0; 1371 1372 if (state->fp == NULL) { /* only start if file not open yet */ 1373 rv = __grstart_compat(state); 1374 if (rv != NS_SUCCESS) 1375 goto compatgrscan_out; 1376 } 1377 rv = NS_NOTFOUND; 1378 1379 for (;;) { /* loop through file */ 1380 if (state->name != NULL) { 1381 /* processing compat entry */ 1382 int crv, cretval; 1383 struct group cgrp, *cgrpres; 1384 1385 if (state->name[0]) { /* specific +group: */ 1386 crv = nsdispatch(NULL, compatnamdtab, 1387 NSDB_GROUP_COMPAT, "getgrnam_r", 1388 __nsdefaultnis, 1389 &cretval, state->name, 1390 &cgrp, filebuf, sizeof(filebuf), &cgrpres); 1391 free(state->name); /* (only check 1 grp) */ 1392 state->name = NULL; 1393 } else if (!search) { /* any group */ 1394 if (searchfunc) { 1395 crv = searchfunc(searchcookie, 1396 &cgrpres); 1397 } else { 1398 crv = nsdispatch(NULL, compatentdtab, 1399 NSDB_GROUP_COMPAT, "getgrent_r", 1400 __nsdefaultnis, 1401 &cretval, &cgrp, filebuf, 1402 sizeof(filebuf), &cgrpres); 1403 } 1404 } else if (name) { /* specific group */ 1405 crv = nsdispatch(NULL, compatnamdtab, 1406 NSDB_GROUP_COMPAT, "getgrnam_r", 1407 __nsdefaultnis, 1408 &cretval, name, 1409 &cgrp, filebuf, sizeof(filebuf), &cgrpres); 1410 } else { /* specific gid */ 1411 crv = nsdispatch(NULL, compatgiddtab, 1412 NSDB_GROUP_COMPAT, "getgrgid_r", 1413 __nsdefaultnis, 1414 &cretval, gid, 1415 &cgrp, filebuf, sizeof(filebuf), &cgrpres); 1416 } 1417 if (crv != NS_SUCCESS) { /* not found */ 1418 free(state->name); 1419 state->name = NULL; 1420 continue; /* try next line */ 1421 } 1422 if (!_gr_copy(cgrpres, grp, buffer, buflen)) { 1423 rv = NS_UNAVAIL; 1424 break; 1425 } 1426 goto compatgrscan_cmpgrp; /* skip to grp test */ 1427 } 1428 1429 /* get next file line */ 1430 if (fgets(filebuf, sizeof(filebuf), state->fp) == NULL) 1431 break; 1432 1433 ep = strchr(filebuf, '\n'); 1434 if (ep == NULL) { /* skip lines that are too big */ 1435 int ch; 1436 1437 while ((ch = getc(state->fp)) != '\n' && ch != EOF) 1438 continue; 1439 continue; 1440 } 1441 *ep = '\0'; /* clear trailing \n */ 1442 1443 if (filebuf[0] == '+') { /* parse compat line */ 1444 if (state->name) 1445 free(state->name); 1446 state->name = NULL; 1447 switch(filebuf[1]) { 1448 case ':': 1449 case '\0': 1450 state->name = strdup(""); 1451 break; 1452 default: 1453 ep = strchr(filebuf + 1, ':'); 1454 if (ep == NULL) 1455 break; 1456 *ep = '\0'; 1457 state->name = strdup(filebuf + 1); 1458 break; 1459 } 1460 if (state->name == NULL) { 1461 rv = NS_UNAVAIL; 1462 break; 1463 } 1464 continue; 1465 } 1466 1467 /* validate line */ 1468 if (! _gr_parse(filebuf, grp, buffer, buflen)) { 1469 continue; /* skip bad lines */ 1470 } 1471 1472 compatgrscan_cmpgrp: 1473 if (! search) { /* just want this one */ 1474 rv = NS_SUCCESS; 1475 break; 1476 } 1477 /* want specific */ 1478 if ((name && strcmp(name, grp->gr_name) == 0) || 1479 (!name && gid == grp->gr_gid)) { 1480 rv = NS_SUCCESS; 1481 break; 1482 } 1483 1484 } 1485 1486 compatgrscan_out: 1487 if (rv != NS_SUCCESS && rv != NS_NOTFOUND) 1488 *retval = errno; 1489 return rv; 1490 } 1491 1492 static struct __grstate_compat _compat_state; 1493 /* storage for non _r functions */ 1494 static struct group _compat_group; 1495 static char _compat_groupbuf[_GETGR_R_SIZE_MAX]; 1496 1497 /*ARGSUSED*/ 1498 static int 1499 _compat_setgrent(void *nsrv, void *nscb, va_list ap) 1500 { 1501 static const ns_dtab dtab[] = { 1502 NS_FILES_CB(__grbad_compat, "files") 1503 NS_DNS_CB(_dns_setgrent, NULL) 1504 NS_NIS_CB(_nis_setgrent, NULL) 1505 NS_COMPAT_CB(__grbad_compat, "compat") 1506 NS_NULL_CB 1507 }; 1508 1509 /* force group_compat setgrent() */ 1510 (void) nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "setgrent", 1511 __nsdefaultnis_forceall); 1512 1513 /* reset state, keep fp open */ 1514 _compat_state.stayopen = 0; 1515 return __grstart_compat(&_compat_state); 1516 } 1517 1518 /*ARGSUSED*/ 1519 static int 1520 _compat_setgroupent(void *nsrv, void *nscb, va_list ap) 1521 { 1522 int *retval = va_arg(ap, int *); 1523 int stayopen = va_arg(ap, int); 1524 1525 int rv; 1526 1527 static const ns_dtab dtab[] = { 1528 NS_FILES_CB(__grbad_compat, "files") 1529 NS_DNS_CB(_dns_setgroupent, NULL) 1530 NS_NIS_CB(_nis_setgroupent, NULL) 1531 NS_COMPAT_CB(__grbad_compat, "compat") 1532 NS_NULL_CB 1533 }; 1534 1535 /* force group_compat setgroupent() */ 1536 (void) nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "setgroupent", 1537 __nsdefaultnis_forceall, &rv, stayopen); 1538 1539 _compat_state.stayopen = stayopen; 1540 rv = __grstart_compat(&_compat_state); 1541 *retval = (rv == NS_SUCCESS); 1542 return rv; 1543 } 1544 1545 /*ARGSUSED*/ 1546 static int 1547 _compat_endgrent(void *nsrv, void *nscb, va_list ap) 1548 { 1549 static const ns_dtab dtab[] = { 1550 NS_FILES_CB(__grbad_compat, "files") 1551 NS_DNS_CB(_dns_endgrent, NULL) 1552 NS_NIS_CB(_nis_endgrent, NULL) 1553 NS_COMPAT_CB(__grbad_compat, "compat") 1554 NS_NULL_CB 1555 }; 1556 1557 /* force group_compat endgrent() */ 1558 (void) nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "endgrent", 1559 __nsdefaultnis_forceall); 1560 1561 /* reset state, close fp */ 1562 _compat_state.stayopen = 0; 1563 return __grend_compat(&_compat_state); 1564 } 1565 1566 /*ARGSUSED*/ 1567 static int 1568 _compat_getgrent(void *nsrv, void *nscb, va_list ap) 1569 { 1570 struct group **retval = va_arg(ap, struct group **); 1571 1572 int rv, rerror; 1573 1574 _DIAGASSERT(retval != NULL); 1575 1576 *retval = NULL; 1577 rv = __grscan_compat(&rerror, &_compat_group, 1578 _compat_groupbuf, sizeof(_compat_groupbuf), 1579 &_compat_state, 0, NULL, 0, NULL, NULL); 1580 if (rv == NS_SUCCESS) 1581 *retval = &_compat_group; 1582 return rv; 1583 } 1584 1585 /*ARGSUSED*/ 1586 static int 1587 _compat_getgrent_r(void *nsrv, void *nscb, va_list ap) 1588 { 1589 int *retval = va_arg(ap, int *); 1590 struct group *grp = va_arg(ap, struct group *); 1591 char *buffer = va_arg(ap, char *); 1592 size_t buflen = va_arg(ap, size_t); 1593 struct group **result = va_arg(ap, struct group **); 1594 1595 int rv; 1596 1597 _DIAGASSERT(retval != NULL); 1598 _DIAGASSERT(grp != NULL); 1599 _DIAGASSERT(buffer != NULL); 1600 _DIAGASSERT(result != NULL); 1601 1602 rv = __grscan_compat(retval, grp, buffer, buflen, 1603 &_compat_state, 0, NULL, 0, NULL, NULL); 1604 if (rv == NS_SUCCESS) 1605 *result = grp; 1606 else 1607 *result = NULL; 1608 return rv; 1609 } 1610 1611 /*ARGSUSED*/ 1612 static int 1613 _compat_getgrgid(void *nsrv, void *nscb, va_list ap) 1614 { 1615 struct group **retval = va_arg(ap, struct group **); 1616 gid_t gid = va_arg(ap, gid_t); 1617 1618 int rv, rerror; 1619 1620 _DIAGASSERT(retval != NULL); 1621 1622 *retval = NULL; 1623 rv = __grstart_compat(&_compat_state); 1624 if (rv != NS_SUCCESS) 1625 return rv; 1626 rv = __grscan_compat(&rerror, &_compat_group, 1627 _compat_groupbuf, sizeof(_compat_groupbuf), 1628 &_compat_state, 1, NULL, gid, NULL, NULL); 1629 if (!_compat_state.stayopen) 1630 __grend_compat(&_compat_state); 1631 if (rv == NS_SUCCESS) 1632 *retval = &_compat_group; 1633 return rv; 1634 } 1635 1636 /*ARGSUSED*/ 1637 static int 1638 _compat_getgrgid_r(void *nsrv, void *nscb, va_list ap) 1639 { 1640 int *retval = va_arg(ap, int *); 1641 gid_t gid = va_arg(ap, gid_t); 1642 struct group *grp = va_arg(ap, struct group *); 1643 char *buffer = va_arg(ap, char *); 1644 size_t buflen = va_arg(ap, size_t); 1645 struct group **result = va_arg(ap, struct group **); 1646 1647 struct __grstate_compat state; 1648 int rv; 1649 1650 _DIAGASSERT(retval != NULL); 1651 _DIAGASSERT(grp != NULL); 1652 _DIAGASSERT(buffer != NULL); 1653 _DIAGASSERT(result != NULL); 1654 1655 *result = NULL; 1656 memset(&state, 0, sizeof(state)); 1657 rv = __grscan_compat(retval, grp, buffer, buflen, &state, 1658 1, NULL, gid, NULL, NULL); 1659 __grend_compat(&state); 1660 if (rv == NS_SUCCESS) 1661 *result = grp; 1662 return rv; 1663 } 1664 1665 /*ARGSUSED*/ 1666 static int 1667 _compat_getgrnam(void *nsrv, void *nscb, va_list ap) 1668 { 1669 struct group **retval = va_arg(ap, struct group **); 1670 const char *name = va_arg(ap, const char *); 1671 1672 int rv, rerror; 1673 1674 _DIAGASSERT(retval != NULL); 1675 1676 *retval = NULL; 1677 rv = __grstart_compat(&_compat_state); 1678 if (rv != NS_SUCCESS) 1679 return rv; 1680 rv = __grscan_compat(&rerror, &_compat_group, 1681 _compat_groupbuf, sizeof(_compat_groupbuf), 1682 &_compat_state, 1, name, 0, NULL, NULL); 1683 if (!_compat_state.stayopen) 1684 __grend_compat(&_compat_state); 1685 if (rv == NS_SUCCESS) 1686 *retval = &_compat_group; 1687 return rv; 1688 } 1689 1690 /*ARGSUSED*/ 1691 static int 1692 _compat_getgrnam_r(void *nsrv, void *nscb, va_list ap) 1693 { 1694 int *retval = va_arg(ap, int *); 1695 const char *name = va_arg(ap, const char *); 1696 struct group *grp = va_arg(ap, struct group *); 1697 char *buffer = va_arg(ap, char *); 1698 size_t buflen = va_arg(ap, size_t); 1699 struct group **result = va_arg(ap, struct group **); 1700 1701 struct __grstate_compat state; 1702 int rv; 1703 1704 _DIAGASSERT(retval != NULL); 1705 _DIAGASSERT(grp != NULL); 1706 _DIAGASSERT(buffer != NULL); 1707 _DIAGASSERT(result != NULL); 1708 1709 *result = NULL; 1710 memset(&state, 0, sizeof(state)); 1711 rv = __grscan_compat(retval, grp, buffer, buflen, &state, 1712 1, name, 0, NULL, NULL); 1713 __grend_compat(&state); 1714 if (rv == NS_SUCCESS) 1715 *result = grp; 1716 return rv; 1717 } 1718 1719 #endif /* _GROUP_COMPAT */ 1720 1721 1722 /* 1723 * public functions 1724 */ 1725 1726 struct group * 1727 getgrent(void) 1728 { 1729 int rv; 1730 struct group *retval; 1731 1732 static const ns_dtab dtab[] = { 1733 NS_FILES_CB(_files_getgrent, NULL) 1734 NS_DNS_CB(_dns_getgrent, NULL) 1735 NS_NIS_CB(_nis_getgrent, NULL) 1736 NS_COMPAT_CB(_compat_getgrent, NULL) 1737 NS_NULL_CB 1738 }; 1739 1740 mutex_lock(&__grmutex); 1741 rv = nsdispatch(NULL, dtab, NSDB_GROUP, "getgrent", __nsdefaultcompat, 1742 &retval); 1743 mutex_unlock(&__grmutex); 1744 return (rv == NS_SUCCESS) ? retval : NULL; 1745 } 1746 1747 int 1748 getgrent_r(struct group *grp, char *buffer, size_t buflen, 1749 struct group **result) 1750 { 1751 int rv, retval; 1752 1753 static const ns_dtab dtab[] = { 1754 NS_FILES_CB(_files_getgrent_r, NULL) 1755 NS_DNS_CB(_dns_getgrent_r, NULL) 1756 NS_NIS_CB(_nis_getgrent_r, NULL) 1757 NS_COMPAT_CB(_compat_getgrent_r, NULL) 1758 NS_NULL_CB 1759 }; 1760 1761 mutex_lock(&__grmutex); 1762 rv = nsdispatch(NULL, dtab, NSDB_GROUP, "getgrent_r", __nsdefaultcompat, 1763 &retval, grp, buffer, buflen, result); 1764 mutex_unlock(&__grmutex); 1765 switch (rv) { 1766 case NS_SUCCESS: 1767 case NS_NOTFOUND: 1768 return 0; 1769 default: 1770 return retval; 1771 } 1772 } 1773 1774 1775 struct group * 1776 getgrgid(gid_t gid) 1777 { 1778 int rv; 1779 struct group *retval; 1780 1781 static const ns_dtab dtab[] = { 1782 NS_FILES_CB(_files_getgrgid, NULL) 1783 NS_DNS_CB(_dns_getgrgid, NULL) 1784 NS_NIS_CB(_nis_getgrgid, NULL) 1785 NS_COMPAT_CB(_compat_getgrgid, NULL) 1786 NS_NULL_CB 1787 }; 1788 1789 mutex_lock(&__grmutex); 1790 rv = nsdispatch(NULL, dtab, NSDB_GROUP, "getgrgid", __nsdefaultcompat, 1791 &retval, gid); 1792 mutex_unlock(&__grmutex); 1793 return (rv == NS_SUCCESS) ? retval : NULL; 1794 } 1795 1796 int 1797 getgrgid_r(gid_t gid, struct group *grp, char *buffer, size_t buflen, 1798 struct group **result) 1799 { 1800 int rv, retval; 1801 1802 static const ns_dtab dtab[] = { 1803 NS_FILES_CB(_files_getgrgid_r, NULL) 1804 NS_DNS_CB(_dns_getgrgid_r, NULL) 1805 NS_NIS_CB(_nis_getgrgid_r, NULL) 1806 NS_COMPAT_CB(_compat_getgrgid_r, NULL) 1807 NS_NULL_CB 1808 }; 1809 1810 _DIAGASSERT(grp != NULL); 1811 _DIAGASSERT(buffer != NULL); 1812 _DIAGASSERT(result != NULL); 1813 1814 *result = NULL; 1815 retval = 0; 1816 mutex_lock(&__grmutex); 1817 rv = nsdispatch(NULL, dtab, NSDB_GROUP, "getgrgid_r", __nsdefaultcompat, 1818 &retval, gid, grp, buffer, buflen, result); 1819 mutex_unlock(&__grmutex); 1820 switch (rv) { 1821 case NS_SUCCESS: 1822 case NS_NOTFOUND: 1823 return 0; 1824 default: 1825 return retval; 1826 } 1827 } 1828 1829 struct group * 1830 getgrnam(const char *name) 1831 { 1832 int rv; 1833 struct group *retval; 1834 1835 static const ns_dtab dtab[] = { 1836 NS_FILES_CB(_files_getgrnam, NULL) 1837 NS_DNS_CB(_dns_getgrnam, NULL) 1838 NS_NIS_CB(_nis_getgrnam, NULL) 1839 NS_COMPAT_CB(_compat_getgrnam, NULL) 1840 NS_NULL_CB 1841 }; 1842 1843 mutex_lock(&__grmutex); 1844 rv = nsdispatch(NULL, dtab, NSDB_GROUP, "getgrnam", __nsdefaultcompat, 1845 &retval, name); 1846 mutex_unlock(&__grmutex); 1847 return (rv == NS_SUCCESS) ? retval : NULL; 1848 } 1849 1850 int 1851 getgrnam_r(const char *name, struct group *grp, char *buffer, size_t buflen, 1852 struct group **result) 1853 { 1854 int rv, retval; 1855 1856 static const ns_dtab dtab[] = { 1857 NS_FILES_CB(_files_getgrnam_r, NULL) 1858 NS_DNS_CB(_dns_getgrnam_r, NULL) 1859 NS_NIS_CB(_nis_getgrnam_r, NULL) 1860 NS_COMPAT_CB(_compat_getgrnam_r, NULL) 1861 NS_NULL_CB 1862 }; 1863 1864 _DIAGASSERT(name != NULL); 1865 _DIAGASSERT(grp != NULL); 1866 _DIAGASSERT(buffer != NULL); 1867 _DIAGASSERT(result != NULL); 1868 1869 *result = NULL; 1870 retval = 0; 1871 mutex_lock(&__grmutex); 1872 rv = nsdispatch(NULL, dtab, NSDB_GROUP, "getgrnam_r", __nsdefaultcompat, 1873 &retval, name, grp, buffer, buflen, result); 1874 mutex_unlock(&__grmutex); 1875 switch (rv) { 1876 case NS_SUCCESS: 1877 case NS_NOTFOUND: 1878 return 0; 1879 default: 1880 return retval; 1881 } 1882 } 1883 1884 void 1885 endgrent(void) 1886 { 1887 static const ns_dtab dtab[] = { 1888 NS_FILES_CB(_files_endgrent, NULL) 1889 NS_DNS_CB(_dns_endgrent, NULL) 1890 NS_NIS_CB(_nis_endgrent, NULL) 1891 NS_COMPAT_CB(_compat_endgrent, NULL) 1892 NS_NULL_CB 1893 }; 1894 1895 mutex_lock(&__grmutex); 1896 /* force all endgrent() methods */ 1897 (void) nsdispatch(NULL, dtab, NSDB_GROUP, "endgrent", 1898 __nsdefaultcompat_forceall); 1899 mutex_unlock(&__grmutex); 1900 } 1901 1902 int 1903 setgroupent(int stayopen) 1904 { 1905 static const ns_dtab dtab[] = { 1906 NS_FILES_CB(_files_setgroupent, NULL) 1907 NS_DNS_CB(_dns_setgroupent, NULL) 1908 NS_NIS_CB(_nis_setgroupent, NULL) 1909 NS_COMPAT_CB(_compat_setgroupent, NULL) 1910 NS_NULL_CB 1911 }; 1912 int rv, retval; 1913 1914 mutex_lock(&__grmutex); 1915 /* force all setgroupent() methods */ 1916 rv = nsdispatch(NULL, dtab, NSDB_GROUP, "setgroupent", 1917 __nsdefaultcompat_forceall, &retval, stayopen); 1918 mutex_unlock(&__grmutex); 1919 return (rv == NS_SUCCESS) ? retval : 0; 1920 } 1921 1922 void 1923 setgrent(void) 1924 { 1925 static const ns_dtab dtab[] = { 1926 NS_FILES_CB(_files_setgrent, NULL) 1927 NS_DNS_CB(_dns_setgrent, NULL) 1928 NS_NIS_CB(_nis_setgrent, NULL) 1929 NS_COMPAT_CB(_compat_setgrent, NULL) 1930 NS_NULL_CB 1931 }; 1932 1933 mutex_lock(&__grmutex); 1934 /* force all setgrent() methods */ 1935 (void) nsdispatch(NULL, dtab, NSDB_GROUP, "setgrent", 1936 __nsdefaultcompat_forceall); 1937 mutex_unlock(&__grmutex); 1938 } 1939