getpwent.c revision 1.78
1 /* $NetBSD: getpwent.c,v 1.78 2012/03/29 13:05:10 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2000, 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) 1988, 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, 1995, 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[] = "@(#)getpwent.c 8.2 (Berkeley) 4/27/95"; 90 #else 91 __RCSID("$NetBSD: getpwent.c,v 1.78 2012/03/29 13:05:10 christos 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 <db.h> 102 #include <errno.h> 103 #include <fcntl.h> 104 #include <limits.h> 105 #include <netgroup.h> 106 #include <nsswitch.h> 107 #include <pwd.h> 108 #include <stdarg.h> 109 #include <stdio.h> 110 #include <stdlib.h> 111 #include <string.h> 112 #include <syslog.h> 113 #include <unistd.h> 114 115 #ifdef HESIOD 116 #include <hesiod.h> 117 #endif 118 119 #ifdef YP 120 #include <machine/param.h> 121 #include <rpc/rpc.h> 122 #include <rpcsvc/yp_prot.h> 123 #include <rpcsvc/ypclnt.h> 124 #endif 125 126 #include "pw_private.h" 127 128 #define _PASSWD_COMPAT /* "passwd" defaults to compat, so always provide it */ 129 130 #ifdef __weak_alias 131 __weak_alias(endpwent,_endpwent) 132 __weak_alias(setpassent,_setpassent) 133 __weak_alias(setpwent,_setpwent) 134 #endif 135 136 #ifdef _REENTRANT 137 static mutex_t _pwmutex = MUTEX_INITIALIZER; 138 #endif 139 140 const char __yp_token[] = "__YP!"; /* Let pwd_mkdb pull this in. */ 141 142 143 /* 144 * The pwd.db lookup techniques and data extraction code here must be kept 145 * in sync with that in `pwd_mkdb'. 146 */ 147 148 #if defined(YP) || defined(HESIOD) 149 /* 150 * _pw_parse 151 * Parses entry using pw_scan(3) (without the trailing \n) 152 * after copying to buf, and fills in pw with corresponding values. 153 * If old is non-zero, entry is in _PASSWORD_OLDFMT. 154 * Returns 1 if parsed successfully, 0 on parse failure. 155 */ 156 static int 157 _pw_parse(const char *entry, struct passwd *pw, char *buf, size_t buflen, 158 int old) 159 { 160 int flags; 161 162 _DIAGASSERT(entry != NULL); 163 _DIAGASSERT(pw != NULL); 164 _DIAGASSERT(buf != NULL); 165 166 if (strlcpy(buf, entry, buflen) >= buflen) 167 return 0; 168 flags = _PASSWORD_NOWARN; 169 if (old) 170 flags |= _PASSWORD_OLDFMT; 171 return __pw_scan(buf, pw, &flags); 172 } 173 #endif /* YP || HESIOD */ 174 175 /* 176 * _pw_opendb 177 * if *db is NULL, dbopen(3) /etc/spwd.db or /etc/pwd.db (depending 178 * upon permissions, etc) 179 */ 180 static int 181 _pw_opendb(DB **db, int *version) 182 { 183 static int warned; 184 DBT key; 185 DBT value; 186 187 const char *dbfile = NULL; 188 189 _DIAGASSERT(db != NULL); 190 _DIAGASSERT(version != NULL); 191 if (*db != NULL) /* open *db */ 192 return NS_SUCCESS; 193 194 if (geteuid() == 0) { 195 dbfile = _PATH_SMP_DB; 196 *db = dbopen(dbfile, O_RDONLY, 0, DB_HASH, NULL); 197 } 198 if (*db == NULL) { 199 dbfile = _PATH_MP_DB; 200 *db = dbopen(dbfile, O_RDONLY, 0, DB_HASH, NULL); 201 } 202 if (*db == NULL) { 203 if (!warned) { 204 int serrno = errno; 205 syslog(LOG_ERR, "%s: %m", dbfile); 206 errno = serrno; 207 } 208 warned = 1; 209 return NS_UNAVAIL; 210 } 211 key.data = __UNCONST("VERSION"); 212 key.size = strlen((char *)key.data) + 1; 213 switch ((*(*db)->get)(*db, &key, &value, 0)) { 214 case 0: 215 if (sizeof(*version) != value.size) 216 return NS_UNAVAIL; 217 (void)memcpy(version, value.data, value.size); 218 break; /* found */ 219 case 1: 220 *version = 0; /* not found */ 221 break; 222 case -1: 223 return NS_UNAVAIL; /* error in db routines */ 224 default: 225 abort(); 226 } 227 return NS_SUCCESS; 228 } 229 230 /* 231 * _pw_getkey 232 * Lookup key in *db, filling in pw 233 * with the result, allocating memory from buffer (size buflen). 234 * (The caller may point key.data to buffer on entry; the contents 235 * of key.data will be invalid on exit.) 236 */ 237 static int 238 _pw_getkey(DB *db, DBT *key, 239 struct passwd *pw, char *buffer, size_t buflen, int *pwflags, 240 int version) 241 { 242 char *p, *t; 243 DBT data; 244 245 _DIAGASSERT(db != NULL); 246 _DIAGASSERT(key != NULL); 247 _DIAGASSERT(pw != NULL); 248 _DIAGASSERT(buffer != NULL); 249 /* pwflags may be NULL (if we don't care about them */ 250 251 if (db == NULL) /* this shouldn't happen */ 252 return NS_UNAVAIL; 253 254 switch ((db->get)(db, key, &data, 0)) { 255 case 0: 256 break; /* found */ 257 case 1: 258 return NS_NOTFOUND; /* not found */ 259 case -1: 260 return NS_UNAVAIL; /* error in db routines */ 261 default: 262 abort(); 263 } 264 265 p = (char *)data.data; 266 if (data.size > buflen) { 267 errno = ERANGE; 268 return NS_UNAVAIL; 269 } 270 271 /* 272 * THE DECODING BELOW MUST MATCH THAT IN pwd_mkdb. 273 */ 274 t = buffer; 275 #define MACRO(a) do { a } while (/*CONSTCOND*/0) 276 #define EXPAND(e) MACRO(e = t; while ((*t++ = *p++));) 277 #define SCALAR(v) MACRO(memmove(&(v), p, sizeof v); p += sizeof v;) 278 EXPAND(pw->pw_name); 279 EXPAND(pw->pw_passwd); 280 SCALAR(pw->pw_uid); 281 SCALAR(pw->pw_gid); 282 if (version == 0) { 283 int32_t tmp; 284 SCALAR(tmp); 285 pw->pw_change = tmp; 286 } else 287 SCALAR(pw->pw_change); 288 EXPAND(pw->pw_class); 289 EXPAND(pw->pw_gecos); 290 EXPAND(pw->pw_dir); 291 EXPAND(pw->pw_shell); 292 if (version == 0) { 293 int32_t tmp; 294 SCALAR(tmp); 295 pw->pw_expire = tmp; 296 } else 297 SCALAR(pw->pw_expire); 298 if (pwflags) { 299 /* See if there's any data left. If so, read in flags. */ 300 if (data.size > (size_t) (p - (char *)data.data)) { 301 SCALAR(*pwflags); 302 } else { /* default */ 303 *pwflags = _PASSWORD_NOUID|_PASSWORD_NOGID; 304 } 305 } 306 307 return NS_SUCCESS; 308 } 309 310 /* 311 * _pw_memfrombuf 312 * Obtain want bytes from buffer (of size buflen) and return a pointer 313 * to the available memory after adjusting buffer/buflen. 314 * Returns NULL if there is insufficient space. 315 */ 316 static char * 317 _pw_memfrombuf(size_t want, char **buffer, size_t *buflen) 318 { 319 char *rv; 320 321 if (want > *buflen) { 322 errno = ERANGE; 323 return NULL; 324 } 325 rv = *buffer; 326 *buffer += want; 327 *buflen -= want; 328 return rv; 329 } 330 331 /* 332 * _pw_copy 333 * Copy the contents of frompw to pw; memory for strings 334 * and arrays will be allocated from buf (of size buflen). 335 * If proto != NULL, use various fields in proto in preference to frompw. 336 * Returns 1 if copied successfully, 0 on copy failure. 337 * NOTE: frompw must not use buf for its own pointers. 338 */ 339 static int 340 _pw_copy(const struct passwd *frompw, struct passwd *pw, 341 char *buf, size_t buflen, const struct passwd *protopw, int protoflags) 342 { 343 size_t count; 344 int useproto; 345 346 _DIAGASSERT(frompw != NULL); 347 _DIAGASSERT(pw != NULL); 348 _DIAGASSERT(buf != NULL); 349 /* protopw may be NULL */ 350 351 useproto = protopw && protopw->pw_name; 352 353 #define COPYSTR(to, from) \ 354 do { \ 355 count = strlen((from)); \ 356 (to) = _pw_memfrombuf(count+1, &buf, &buflen); \ 357 if ((to) == NULL) \ 358 return 0; \ 359 memmove((to), (from), count); \ 360 to[count] = '\0'; \ 361 } while (0) /* LINTED */ 362 363 #define COPYFIELD(field) COPYSTR(pw->field, frompw->field) 364 365 #define COPYPROTOFIELD(field) COPYSTR(pw->field, \ 366 (useproto && *protopw->field ? protopw->field : frompw->field)) 367 368 COPYFIELD(pw_name); 369 370 #ifdef PW_OVERRIDE_PASSWD 371 COPYPROTOFIELD(pw_passwd); 372 #else 373 COPYFIELD(pw_passwd); 374 #endif 375 376 if (useproto && !(protoflags & _PASSWORD_NOUID)) 377 pw->pw_uid = protopw->pw_uid; 378 else 379 pw->pw_uid = frompw->pw_uid; 380 381 if (useproto && !(protoflags & _PASSWORD_NOGID)) 382 pw->pw_gid = protopw->pw_gid; 383 else 384 pw->pw_gid = frompw->pw_gid; 385 386 pw->pw_change = frompw->pw_change; 387 COPYFIELD(pw_class); 388 COPYPROTOFIELD(pw_gecos); 389 COPYPROTOFIELD(pw_dir); 390 COPYPROTOFIELD(pw_shell); 391 392 #undef COPYSTR 393 #undef COPYFIELD 394 #undef COPYPROTOFIELD 395 396 return 1; 397 } 398 399 400 /* 401 * files methods 402 */ 403 404 /* state shared between files methods */ 405 struct files_state { 406 int stayopen; /* see getpassent(3) */ 407 DB *db; /* passwd file handle */ 408 int keynum; /* key counter, -1 if no more */ 409 int version; 410 }; 411 412 static struct files_state _files_state; 413 /* storage for non _r functions */ 414 static struct passwd _files_passwd; 415 static char _files_passwdbuf[_GETPW_R_SIZE_MAX]; 416 417 static int 418 _files_start(struct files_state *state) 419 { 420 int rv; 421 422 _DIAGASSERT(state != NULL); 423 424 state->keynum = 0; 425 rv = _pw_opendb(&state->db, &state->version); 426 if (rv != NS_SUCCESS) 427 return rv; 428 return NS_SUCCESS; 429 } 430 431 static int 432 _files_end(struct files_state *state) 433 { 434 435 _DIAGASSERT(state != NULL); 436 437 state->keynum = 0; 438 if (state->db) { 439 (void)(state->db->close)(state->db); 440 state->db = NULL; 441 } 442 return NS_SUCCESS; 443 } 444 445 /* 446 * _files_pwscan 447 * Search state->db for the next desired entry. 448 * If search is _PW_KEYBYNUM, look for state->keynum. 449 * If search is _PW_KEYBYNAME, look for name. 450 * If search is _PW_KEYBYUID, look for uid. 451 * Sets *retval to the errno if the result is not NS_SUCCESS 452 * or NS_NOTFOUND. 453 */ 454 static int 455 _files_pwscan(int *retval, struct passwd *pw, char *buffer, size_t buflen, 456 struct files_state *state, int search, const char *name, uid_t uid) 457 { 458 const void *from; 459 size_t fromlen; 460 DBT key; 461 int rv; 462 463 _DIAGASSERT(retval != NULL); 464 _DIAGASSERT(pw != NULL); 465 _DIAGASSERT(buffer != NULL); 466 _DIAGASSERT(state != NULL); 467 /* name is NULL to indicate searching for uid */ 468 469 *retval = 0; 470 471 if (state->db == NULL) { /* only start if file not open yet */ 472 rv = _files_start(state); 473 if (rv != NS_SUCCESS) 474 goto filespwscan_out; 475 } 476 477 for (;;) { /* search for a match */ 478 switch (search) { 479 case _PW_KEYBYNUM: 480 if (state->keynum == -1) 481 return NS_NOTFOUND; /* no more records */ 482 state->keynum++; 483 from = &state->keynum; 484 fromlen = sizeof(state->keynum); 485 break; 486 case _PW_KEYBYNAME: 487 from = name; 488 fromlen = strlen(name); 489 break; 490 case _PW_KEYBYUID: 491 from = &uid; 492 fromlen = sizeof(uid); 493 break; 494 default: 495 abort(); 496 } 497 498 if (buflen <= fromlen) { /* buffer too small */ 499 *retval = ERANGE; 500 return NS_UNAVAIL; 501 } 502 buffer[0] = search; /* setup key */ 503 memmove(buffer + 1, from, fromlen); 504 key.size = fromlen + 1; 505 key.data = (u_char *)buffer; 506 507 /* search for key */ 508 rv = _pw_getkey(state->db, &key, pw, buffer, buflen, NULL, 509 state->version); 510 if (rv != NS_SUCCESS) /* no match */ 511 break; 512 if (pw->pw_name[0] == '+' || pw->pw_name[0] == '-') { 513 /* if a compat line */ 514 if (search == _PW_KEYBYNUM) 515 continue; /* read next if pwent */ 516 rv = NS_NOTFOUND; /* don't match if pw{nam,uid} */ 517 break; 518 } 519 break; 520 } 521 522 if (rv == NS_NOTFOUND && search == _PW_KEYBYNUM) 523 state->keynum = -1; /* flag `no more records' */ 524 525 if (rv == NS_SUCCESS) { 526 if ((search == _PW_KEYBYUID && pw->pw_uid != uid) || 527 (search == _PW_KEYBYNAME && strcmp(pw->pw_name, name) != 0)) 528 rv = NS_NOTFOUND; 529 } 530 531 filespwscan_out: 532 if (rv != NS_SUCCESS && rv != NS_NOTFOUND) 533 *retval = errno; 534 return rv; 535 } 536 537 /*ARGSUSED*/ 538 static int 539 _files_setpwent(void *nsrv, void *nscb, va_list ap) 540 { 541 542 _files_state.stayopen = 0; 543 return _files_start(&_files_state); 544 } 545 546 /*ARGSUSED*/ 547 static int 548 _files_setpassent(void *nsrv, void *nscb, va_list ap) 549 { 550 int *retval = va_arg(ap, int *); 551 int stayopen = va_arg(ap, int); 552 553 int rv; 554 555 _files_state.stayopen = stayopen; 556 rv = _files_start(&_files_state); 557 *retval = (rv == NS_SUCCESS); 558 return rv; 559 } 560 561 /*ARGSUSED*/ 562 static int 563 _files_endpwent(void *nsrv, void *nscb, va_list ap) 564 { 565 566 _files_state.stayopen = 0; 567 return _files_end(&_files_state); 568 } 569 570 /*ARGSUSED*/ 571 static int 572 _files_getpwent(void *nsrv, void *nscb, va_list ap) 573 { 574 struct passwd **retval = va_arg(ap, struct passwd **); 575 576 int rv, rerror; 577 578 _DIAGASSERT(retval != NULL); 579 580 *retval = NULL; 581 rv = _files_pwscan(&rerror, &_files_passwd, 582 _files_passwdbuf, sizeof(_files_passwdbuf), 583 &_files_state, _PW_KEYBYNUM, NULL, 0); 584 if (rv == NS_SUCCESS) 585 *retval = &_files_passwd; 586 return rv; 587 } 588 589 /*ARGSUSED*/ 590 static int 591 _files_getpwent_r(void *nsrv, void *nscb, va_list ap) 592 { 593 int *retval = va_arg(ap, int *); 594 struct passwd *pw = va_arg(ap, struct passwd *); 595 char *buffer = va_arg(ap, char *); 596 size_t buflen = va_arg(ap, size_t); 597 struct passwd **result = va_arg(ap, struct passwd **); 598 599 int rv; 600 601 _DIAGASSERT(retval != NULL); 602 _DIAGASSERT(pw != NULL); 603 _DIAGASSERT(buffer != NULL); 604 _DIAGASSERT(result != NULL); 605 606 rv = _files_pwscan(retval, pw, buffer, buflen, &_files_state, 607 _PW_KEYBYNUM, NULL, 0); 608 if (rv == NS_SUCCESS) 609 *result = pw; 610 else 611 *result = NULL; 612 return rv; 613 } 614 615 /*ARGSUSED*/ 616 static int 617 _files_getpwnam(void *nsrv, void *nscb, va_list ap) 618 { 619 struct passwd **retval = va_arg(ap, struct passwd **); 620 const char *name = va_arg(ap, const char *); 621 622 int rv, rerror; 623 624 _DIAGASSERT(retval != NULL); 625 626 *retval = NULL; 627 rv = _files_start(&_files_state); 628 if (rv != NS_SUCCESS) 629 return rv; 630 rv = _files_pwscan(&rerror, &_files_passwd, 631 _files_passwdbuf, sizeof(_files_passwdbuf), 632 &_files_state, _PW_KEYBYNAME, name, 0); 633 if (!_files_state.stayopen) 634 _files_end(&_files_state); 635 if (rv == NS_SUCCESS) 636 *retval = &_files_passwd; 637 return rv; 638 } 639 640 /*ARGSUSED*/ 641 static int 642 _files_getpwnam_r(void *nsrv, void *nscb, va_list ap) 643 { 644 int *retval = va_arg(ap, int *); 645 const char *name = va_arg(ap, const char *); 646 struct passwd *pw = va_arg(ap, struct passwd *); 647 char *buffer = va_arg(ap, char *); 648 size_t buflen = va_arg(ap, size_t); 649 struct passwd **result = va_arg(ap, struct passwd **); 650 651 struct files_state state; 652 int rv; 653 654 _DIAGASSERT(retval != NULL); 655 _DIAGASSERT(pw != NULL); 656 _DIAGASSERT(buffer != NULL); 657 _DIAGASSERT(result != NULL); 658 659 *result = NULL; 660 memset(&state, 0, sizeof(state)); 661 rv = _files_pwscan(retval, pw, buffer, buflen, &state, 662 _PW_KEYBYNAME, name, 0); 663 _files_end(&state); 664 if (rv == NS_SUCCESS) 665 *result = pw; 666 return rv; 667 } 668 669 /*ARGSUSED*/ 670 static int 671 _files_getpwuid(void *nsrv, void *nscb, va_list ap) 672 { 673 struct passwd **retval = va_arg(ap, struct passwd **); 674 uid_t uid = va_arg(ap, uid_t); 675 676 int rv, rerror; 677 678 _DIAGASSERT(retval != NULL); 679 680 *retval = NULL; 681 rv = _files_start(&_files_state); 682 if (rv != NS_SUCCESS) 683 return rv; 684 rv = _files_pwscan(&rerror, &_files_passwd, 685 _files_passwdbuf, sizeof(_files_passwdbuf), 686 &_files_state, _PW_KEYBYUID, NULL, uid); 687 if (!_files_state.stayopen) 688 _files_end(&_files_state); 689 if (rv == NS_SUCCESS) 690 *retval = &_files_passwd; 691 return rv; 692 } 693 694 /*ARGSUSED*/ 695 static int 696 _files_getpwuid_r(void *nsrv, void *nscb, va_list ap) 697 { 698 int *retval = va_arg(ap, int *); 699 uid_t uid = va_arg(ap, uid_t); 700 struct passwd *pw = va_arg(ap, struct passwd *); 701 char *buffer = va_arg(ap, char *); 702 size_t buflen = va_arg(ap, size_t); 703 struct passwd **result = va_arg(ap, struct passwd **); 704 705 struct files_state state; 706 int rv; 707 708 _DIAGASSERT(retval != NULL); 709 _DIAGASSERT(pw != NULL); 710 _DIAGASSERT(buffer != NULL); 711 _DIAGASSERT(result != NULL); 712 713 *result = NULL; 714 memset(&state, 0, sizeof(state)); 715 rv = _files_pwscan(retval, pw, buffer, buflen, &state, 716 _PW_KEYBYUID, NULL, uid); 717 _files_end(&state); 718 if (rv == NS_SUCCESS) 719 *result = pw; 720 return rv; 721 } 722 723 724 #ifdef HESIOD 725 /* 726 * dns methods 727 */ 728 729 /* state shared between dns methods */ 730 struct dns_state { 731 int stayopen; /* see getpassent(3) */ 732 void *context; /* Hesiod context */ 733 int num; /* passwd index, -1 if no more */ 734 }; 735 736 static struct dns_state _dns_state; 737 /* storage for non _r functions */ 738 static struct passwd _dns_passwd; 739 static char _dns_passwdbuf[_GETPW_R_SIZE_MAX]; 740 741 static int 742 _dns_start(struct dns_state *state) 743 { 744 745 _DIAGASSERT(state != NULL); 746 747 state->num = 0; 748 if (state->context == NULL) { /* setup Hesiod */ 749 if (hesiod_init(&state->context) == -1) 750 return NS_UNAVAIL; 751 } 752 753 return NS_SUCCESS; 754 } 755 756 static int 757 _dns_end(struct dns_state *state) 758 { 759 760 _DIAGASSERT(state != NULL); 761 762 state->num = 0; 763 if (state->context) { 764 hesiod_end(state->context); 765 state->context = NULL; 766 } 767 return NS_SUCCESS; 768 } 769 770 /* 771 * _dns_pwscan 772 * Look for the Hesiod name provided in buffer in the NULL-terminated 773 * list of zones, 774 * and decode into pw/buffer/buflen. 775 */ 776 static int 777 _dns_pwscan(int *retval, struct passwd *pw, char *buffer, size_t buflen, 778 struct dns_state *state, const char **zones) 779 { 780 const char **curzone; 781 char **hp, *ep; 782 int rv; 783 784 _DIAGASSERT(retval != NULL); 785 _DIAGASSERT(pw != NULL); 786 _DIAGASSERT(buffer != NULL); 787 _DIAGASSERT(state != NULL); 788 _DIAGASSERT(zones != NULL); 789 790 *retval = 0; 791 792 if (state->context == NULL) { /* only start if Hesiod not setup */ 793 rv = _dns_start(state); 794 if (rv != NS_SUCCESS) 795 return rv; 796 } 797 798 hp = NULL; 799 rv = NS_NOTFOUND; 800 801 for (curzone = zones; *curzone; curzone++) { /* search zones */ 802 hp = hesiod_resolve(state->context, buffer, *curzone); 803 if (hp != NULL) 804 break; 805 if (errno != ENOENT) { 806 rv = NS_UNAVAIL; 807 goto dnspwscan_out; 808 } 809 } 810 if (*curzone == NULL) 811 goto dnspwscan_out; 812 813 if ((ep = strchr(hp[0], '\n')) != NULL) 814 *ep = '\0'; /* clear trailing \n */ 815 if (_pw_parse(hp[0], pw, buffer, buflen, 1)) /* validate line */ 816 rv = NS_SUCCESS; 817 else 818 rv = NS_UNAVAIL; 819 820 dnspwscan_out: 821 if (rv != NS_SUCCESS && rv != NS_NOTFOUND) 822 *retval = errno; 823 if (hp) 824 hesiod_free_list(state->context, hp); 825 return rv; 826 } 827 828 /*ARGSUSED*/ 829 static int 830 _dns_setpwent(void *nsrv, void *nscb, va_list ap) 831 { 832 833 _dns_state.stayopen = 0; 834 return _dns_start(&_dns_state); 835 } 836 837 /*ARGSUSED*/ 838 static int 839 _dns_setpassent(void *nsrv, void *nscb, va_list ap) 840 { 841 int *retval = va_arg(ap, int *); 842 int stayopen = va_arg(ap, int); 843 844 int rv; 845 846 _dns_state.stayopen = stayopen; 847 rv = _dns_start(&_dns_state); 848 *retval = (rv == NS_SUCCESS); 849 return rv; 850 } 851 852 /*ARGSUSED*/ 853 static int 854 _dns_endpwent(void *nsrv, void *nscb, va_list ap) 855 { 856 857 _dns_state.stayopen = 0; 858 return _dns_end(&_dns_state); 859 } 860 861 /*ARGSUSED*/ 862 static int 863 _dns_getpwent(void *nsrv, void *nscb, va_list ap) 864 { 865 struct passwd **retval = va_arg(ap, struct passwd **); 866 867 char **hp, *ep; 868 int rv; 869 870 _DIAGASSERT(retval != NULL); 871 872 *retval = NULL; 873 874 if (_dns_state.num == -1) /* exhausted search */ 875 return NS_NOTFOUND; 876 877 if (_dns_state.context == NULL) { 878 /* only start if Hesiod not setup */ 879 rv = _dns_start(&_dns_state); 880 if (rv != NS_SUCCESS) 881 return rv; 882 } 883 884 next_dns_entry: 885 hp = NULL; 886 rv = NS_NOTFOUND; 887 888 /* find passwd-NNN */ 889 snprintf(_dns_passwdbuf, sizeof(_dns_passwdbuf), 890 "passwd-%u", _dns_state.num); 891 _dns_state.num++; 892 893 hp = hesiod_resolve(_dns_state.context, _dns_passwdbuf, "passwd"); 894 if (hp == NULL) { 895 if (errno == ENOENT) 896 _dns_state.num = -1; 897 else 898 rv = NS_UNAVAIL; 899 } else { 900 if ((ep = strchr(hp[0], '\n')) != NULL) 901 *ep = '\0'; /* clear trailing \n */ 902 /* validate line */ 903 if (_pw_parse(hp[0], &_dns_passwd, 904 _dns_passwdbuf, sizeof(_dns_passwdbuf), 1)) 905 rv = NS_SUCCESS; 906 else { /* dodgy entry, try again */ 907 hesiod_free_list(_dns_state.context, hp); 908 goto next_dns_entry; 909 } 910 } 911 912 if (hp) 913 hesiod_free_list(_dns_state.context, hp); 914 if (rv == NS_SUCCESS) 915 *retval = &_dns_passwd; 916 return rv; 917 } 918 919 /*ARGSUSED*/ 920 static int 921 _dns_getpwent_r(void *nsrv, void *nscb, va_list ap) 922 { 923 int *retval = va_arg(ap, int *); 924 struct passwd *pw = va_arg(ap, struct passwd *); 925 char *buffer = va_arg(ap, char *); 926 size_t buflen = va_arg(ap, size_t); 927 struct passwd **result = va_arg(ap, struct passwd **); 928 929 char **hp, *ep; 930 int rv; 931 932 _DIAGASSERT(retval != NULL); 933 _DIAGASSERT(pw != NULL); 934 _DIAGASSERT(buffer != NULL); 935 _DIAGASSERT(result != NULL); 936 937 *retval = 0; 938 939 if (_dns_state.num == -1) /* exhausted search */ 940 return NS_NOTFOUND; 941 942 if (_dns_state.context == NULL) { 943 /* only start if Hesiod not setup */ 944 rv = _dns_start(&_dns_state); 945 if (rv != NS_SUCCESS) 946 return rv; 947 } 948 949 next_dns_entry: 950 hp = NULL; 951 rv = NS_NOTFOUND; 952 953 /* find passwd-NNN */ 954 snprintf(buffer, buflen, "passwd-%u", _dns_state.num); 955 _dns_state.num++; 956 957 hp = hesiod_resolve(_dns_state.context, buffer, "passwd"); 958 if (hp == NULL) { 959 if (errno == ENOENT) 960 _dns_state.num = -1; 961 else 962 rv = NS_UNAVAIL; 963 } else { 964 if ((ep = strchr(hp[0], '\n')) != NULL) 965 *ep = '\0'; /* clear trailing \n */ 966 /* validate line */ 967 if (_pw_parse(hp[0], pw, buffer, buflen, 1)) 968 rv = NS_SUCCESS; 969 else { /* dodgy entry, try again */ 970 hesiod_free_list(_dns_state.context, hp); 971 goto next_dns_entry; 972 } 973 } 974 975 if (hp) 976 hesiod_free_list(_dns_state.context, hp); 977 if (rv == NS_SUCCESS) 978 *result = pw; 979 else 980 *result = NULL; 981 return rv; 982 } 983 984 static const char *_dns_uid_zones[] = { 985 "uid", 986 "passwd", 987 NULL 988 }; 989 990 /*ARGSUSED*/ 991 static int 992 _dns_getpwuid(void *nsrv, void *nscb, va_list ap) 993 { 994 struct passwd **retval = va_arg(ap, struct passwd **); 995 uid_t uid = va_arg(ap, uid_t); 996 997 int rv, rerror; 998 999 _DIAGASSERT(retval != NULL); 1000 1001 *retval = NULL; 1002 rv = _dns_start(&_dns_state); 1003 if (rv != NS_SUCCESS) 1004 return rv; 1005 snprintf(_dns_passwdbuf, sizeof(_dns_passwdbuf), 1006 "%u", (unsigned int)uid); 1007 rv = _dns_pwscan(&rerror, &_dns_passwd, 1008 _dns_passwdbuf, sizeof(_dns_passwdbuf), 1009 &_dns_state, _dns_uid_zones); 1010 if (!_dns_state.stayopen) 1011 _dns_end(&_dns_state); 1012 if (rv == NS_SUCCESS && uid == _dns_passwd.pw_uid) 1013 *retval = &_dns_passwd; 1014 return rv; 1015 } 1016 1017 /*ARGSUSED*/ 1018 static int 1019 _dns_getpwuid_r(void *nsrv, void *nscb, va_list ap) 1020 { 1021 int *retval = va_arg(ap, int *); 1022 uid_t uid = va_arg(ap, uid_t); 1023 struct passwd *pw = va_arg(ap, struct passwd *); 1024 char *buffer = va_arg(ap, char *); 1025 size_t buflen = va_arg(ap, size_t); 1026 struct passwd **result = va_arg(ap, struct passwd **); 1027 1028 struct dns_state state; 1029 int rv; 1030 1031 _DIAGASSERT(retval != NULL); 1032 _DIAGASSERT(pw != NULL); 1033 _DIAGASSERT(buffer != NULL); 1034 _DIAGASSERT(result != NULL); 1035 1036 *result = NULL; 1037 memset(&state, 0, sizeof(state)); 1038 snprintf(buffer, buflen, "%u", (unsigned int)uid); 1039 rv = _dns_pwscan(retval, pw, buffer, buflen, &state, _dns_uid_zones); 1040 _dns_end(&state); 1041 if (rv != NS_SUCCESS) 1042 return rv; 1043 if (uid == pw->pw_uid) { 1044 *result = pw; 1045 return NS_SUCCESS; 1046 } else 1047 return NS_NOTFOUND; 1048 } 1049 1050 static const char *_dns_nam_zones[] = { 1051 "passwd", 1052 NULL 1053 }; 1054 1055 /*ARGSUSED*/ 1056 static int 1057 _dns_getpwnam(void *nsrv, void *nscb, va_list ap) 1058 { 1059 struct passwd **retval = va_arg(ap, struct passwd **); 1060 const char *name = va_arg(ap, const char *); 1061 1062 int rv, rerror; 1063 1064 _DIAGASSERT(retval != NULL); 1065 1066 *retval = NULL; 1067 rv = _dns_start(&_dns_state); 1068 if (rv != NS_SUCCESS) 1069 return rv; 1070 snprintf(_dns_passwdbuf, sizeof(_dns_passwdbuf), "%s", name); 1071 rv = _dns_pwscan(&rerror, &_dns_passwd, 1072 _dns_passwdbuf, sizeof(_dns_passwdbuf), 1073 &_dns_state, _dns_nam_zones); 1074 if (!_dns_state.stayopen) 1075 _dns_end(&_dns_state); 1076 if (rv == NS_SUCCESS && strcmp(name, _dns_passwd.pw_name) == 0) 1077 *retval = &_dns_passwd; 1078 return rv; 1079 } 1080 1081 /*ARGSUSED*/ 1082 static int 1083 _dns_getpwnam_r(void *nsrv, void *nscb, va_list ap) 1084 { 1085 int *retval = va_arg(ap, int *); 1086 const char *name = va_arg(ap, const char *); 1087 struct passwd *pw = va_arg(ap, struct passwd *); 1088 char *buffer = va_arg(ap, char *); 1089 size_t buflen = va_arg(ap, size_t); 1090 struct passwd **result = va_arg(ap, struct passwd **); 1091 1092 struct dns_state state; 1093 int rv; 1094 1095 _DIAGASSERT(retval != NULL); 1096 _DIAGASSERT(pw != NULL); 1097 _DIAGASSERT(buffer != NULL); 1098 _DIAGASSERT(result != NULL); 1099 1100 *result = NULL; 1101 memset(&state, 0, sizeof(state)); 1102 snprintf(buffer, buflen, "%s", name); 1103 rv = _dns_pwscan(retval, pw, buffer, buflen, &state, _dns_nam_zones); 1104 _dns_end(&state); 1105 if (rv != NS_SUCCESS) 1106 return rv; 1107 if (strcmp(name, pw->pw_name) == 0) { 1108 *result = pw; 1109 return NS_SUCCESS; 1110 } else 1111 return NS_NOTFOUND; 1112 } 1113 1114 #endif /* HESIOD */ 1115 1116 1117 #ifdef YP 1118 /* 1119 * nis methods 1120 */ 1121 /* state shared between nis methods */ 1122 struct nis_state { 1123 int stayopen; /* see getpassent(3) */ 1124 char *domain; /* NIS domain */ 1125 int done; /* non-zero if search exhausted */ 1126 char *current; /* current first/next match */ 1127 int currentlen; /* length of _nis_current */ 1128 enum { /* shadow map type */ 1129 NISMAP_UNKNOWN = 0, /* unknown ... */ 1130 NISMAP_NONE, /* none: use "passwd.by*" */ 1131 NISMAP_ADJUNCT, /* pw_passwd from "passwd.adjunct.*" */ 1132 NISMAP_MASTER /* all from "master.passwd.by*" */ 1133 } maptype; 1134 }; 1135 1136 static struct nis_state _nis_state; 1137 /* storage for non _r functions */ 1138 static struct passwd _nis_passwd; 1139 static char _nis_passwdbuf[_GETPW_R_SIZE_MAX]; 1140 1141 static const char __nis_pw_n_1[] = "master.passwd.byname"; 1142 static const char __nis_pw_n_2[] = "passwd.byname"; 1143 static const char __nis_pw_u_1[] = "master.passwd.byuid"; 1144 static const char __nis_pw_u_2[] = "passwd.byuid"; 1145 1146 static const char * const __nis_pw_n_map[4] = { __nis_pw_n_2, __nis_pw_n_2, __nis_pw_n_2, __nis_pw_n_1 }; 1147 static const char * const __nis_pw_u_map[4] = { __nis_pw_u_2, __nis_pw_u_2, __nis_pw_u_2, __nis_pw_u_1 }; 1148 1149 /* macros for deciding which NIS maps to use. */ 1150 #define PASSWD_BYNAME(x) ((x)->maptype == NISMAP_MASTER ? __nis_pw_n_1 : __nis_pw_n_2) 1151 #define PASSWD_BYUID(x) ((x)->maptype == NISMAP_MASTER ? __nis_pw_u_1 : __nis_pw_u_2) 1152 1153 static int 1154 _nis_start(struct nis_state *state) 1155 { 1156 1157 _DIAGASSERT(state != NULL); 1158 1159 state->done = 0; 1160 if (state->current) { 1161 free(state->current); 1162 state->current = NULL; 1163 } 1164 if (state->domain == NULL) { /* setup NIS */ 1165 switch (yp_get_default_domain(&state->domain)) { 1166 case 0: 1167 break; 1168 case YPERR_RESRC: 1169 return NS_TRYAGAIN; 1170 default: 1171 return NS_UNAVAIL; 1172 } 1173 } 1174 1175 /* determine where to get pw_passwd from */ 1176 if (state->maptype == NISMAP_UNKNOWN) { 1177 int r, order; 1178 1179 state->maptype = NISMAP_NONE; /* default to no adjunct */ 1180 if (geteuid() != 0) /* non-root can't use adjunct */ 1181 return NS_SUCCESS; 1182 1183 /* look for "master.passwd.*" */ 1184 r = yp_order(state->domain, "master.passwd.byname", &order); 1185 if (r == 0) { 1186 state->maptype = NISMAP_MASTER; 1187 return NS_SUCCESS; 1188 } 1189 1190 /* master.passwd doesn't exist, try passwd.adjunct */ 1191 if (r == YPERR_MAP) { 1192 r = yp_order(state->domain, "passwd.adjunct.byname", 1193 &order); 1194 if (r == 0) 1195 state->maptype = NISMAP_ADJUNCT; 1196 } 1197 } 1198 return NS_SUCCESS; 1199 } 1200 1201 static int 1202 _nis_end(struct nis_state *state) 1203 { 1204 1205 _DIAGASSERT(state != NULL); 1206 1207 if (state->domain) 1208 state->domain = NULL; 1209 state->done = 0; 1210 if (state->current) 1211 free(state->current); 1212 state->current = NULL; 1213 state->maptype = NISMAP_UNKNOWN; 1214 return NS_SUCCESS; 1215 } 1216 1217 /* 1218 * nis_parse 1219 * wrapper to _pw_parse that obtains the real password from the 1220 * "passwd.adjunct.byname" NIS map if the maptype is NISMAP_ADJUNCT. 1221 */ 1222 static int 1223 _nis_parse(const char *entry, struct passwd *pw, char *buf, size_t buflen, 1224 struct nis_state *state) 1225 { 1226 size_t elen; 1227 1228 _DIAGASSERT(entry != NULL); 1229 _DIAGASSERT(pw != NULL); 1230 _DIAGASSERT(buf != NULL); 1231 _DIAGASSERT(state != NULL); 1232 1233 elen = strlen(entry); 1234 if (elen >= buflen) 1235 return 0; 1236 if (! _pw_parse(entry, pw, buf, buflen, 1237 !(state->maptype == NISMAP_MASTER))) 1238 return 0; 1239 1240 if ((state->maptype == NISMAP_ADJUNCT) && 1241 (strstr(pw->pw_passwd, "##") != NULL)) { 1242 char *data; 1243 int datalen; 1244 1245 if (yp_match(state->domain, "passwd.adjunct.byname", 1246 pw->pw_name, (int)strlen(pw->pw_name), 1247 &data, &datalen) == 0) { 1248 char *bp, *ep; 1249 /* skip name to get password */ 1250 ep = data; 1251 if ((bp = strsep(&ep, ":")) != NULL && 1252 (bp = strsep(&ep, ":")) != NULL) { 1253 /* store new pw_passwd after entry */ 1254 strlcpy(buf + elen, bp, buflen - elen); 1255 pw->pw_passwd = &buf[elen]; 1256 } 1257 free(data); 1258 } 1259 } 1260 1261 return 1; 1262 } 1263 1264 1265 /* 1266 * _nis_pwscan 1267 * Look for the yp key provided in buffer from map, 1268 * and decode into pw/buffer/buflen. 1269 */ 1270 static int 1271 _nis_pwscan(int *retval, struct passwd *pw, char *buffer, size_t buflen, 1272 struct nis_state *state, const char * const *map_arr) 1273 { 1274 char *data; 1275 int nisr, rv, datalen; 1276 1277 _DIAGASSERT(retval != NULL); 1278 _DIAGASSERT(pw != NULL); 1279 _DIAGASSERT(buffer != NULL); 1280 _DIAGASSERT(state != NULL); 1281 _DIAGASSERT(map_arr != NULL); 1282 1283 *retval = 0; 1284 1285 if (state->domain == NULL) { /* only start if NIS not setup */ 1286 rv = _nis_start(state); 1287 if (rv != NS_SUCCESS) 1288 return rv; 1289 } 1290 1291 data = NULL; 1292 rv = NS_NOTFOUND; 1293 _DIAGASSERT(state->maptype > 0 && state->maptype < sizeof(map_arr)/sizeof(const char*)); 1294 1295 /* search map */ 1296 nisr = yp_match(state->domain, map_arr[state->maptype], buffer, (int)strlen(buffer), 1297 &data, &datalen); 1298 switch (nisr) { 1299 case 0: 1300 data[datalen] = '\0'; /* clear trailing \n */ 1301 if (_nis_parse(data, pw, buffer, buflen, state)) 1302 rv = NS_SUCCESS; /* validate line */ 1303 else 1304 rv = NS_UNAVAIL; 1305 break; 1306 case YPERR_KEY: 1307 break; 1308 default: 1309 rv = NS_UNAVAIL; 1310 break; 1311 } 1312 1313 if (rv != NS_SUCCESS && rv != NS_NOTFOUND) 1314 *retval = errno; 1315 if (data) 1316 free(data); 1317 return rv; 1318 } 1319 1320 /*ARGSUSED*/ 1321 static int 1322 _nis_setpwent(void *nsrv, void *nscb, va_list ap) 1323 { 1324 1325 _nis_state.stayopen = 0; 1326 return _nis_start(&_nis_state); 1327 } 1328 1329 /*ARGSUSED*/ 1330 static int 1331 _nis_setpassent(void *nsrv, void *nscb, va_list ap) 1332 { 1333 int *retval = va_arg(ap, int *); 1334 int stayopen = va_arg(ap, int); 1335 1336 int rv; 1337 1338 _nis_state.stayopen = stayopen; 1339 rv = _nis_start(&_nis_state); 1340 *retval = (rv == NS_SUCCESS); 1341 return rv; 1342 } 1343 1344 /*ARGSUSED*/ 1345 static int 1346 _nis_endpwent(void *nsrv, void *nscb, va_list ap) 1347 { 1348 1349 return _nis_end(&_nis_state); 1350 } 1351 1352 1353 /*ARGSUSED*/ 1354 static int 1355 _nis_getpwent(void *nsrv, void *nscb, va_list ap) 1356 { 1357 struct passwd **retval = va_arg(ap, struct passwd **); 1358 1359 char *key, *data; 1360 int keylen, datalen, rv, nisr; 1361 1362 _DIAGASSERT(retval != NULL); 1363 1364 *retval = NULL; 1365 1366 if (_nis_state.done) /* exhausted search */ 1367 return NS_NOTFOUND; 1368 if (_nis_state.domain == NULL) { 1369 /* only start if NIS not setup */ 1370 rv = _nis_start(&_nis_state); 1371 if (rv != NS_SUCCESS) 1372 return rv; 1373 } 1374 1375 next_nis_entry: 1376 key = NULL; 1377 data = NULL; 1378 rv = NS_NOTFOUND; 1379 1380 if (_nis_state.current) { /* already searching */ 1381 nisr = yp_next(_nis_state.domain, PASSWD_BYNAME(&_nis_state), 1382 _nis_state.current, _nis_state.currentlen, 1383 &key, &keylen, &data, &datalen); 1384 free(_nis_state.current); 1385 _nis_state.current = NULL; 1386 switch (nisr) { 1387 case 0: 1388 _nis_state.current = key; 1389 _nis_state.currentlen = keylen; 1390 key = NULL; 1391 break; 1392 case YPERR_NOMORE: 1393 _nis_state.done = 1; 1394 goto nisent_out; 1395 default: 1396 rv = NS_UNAVAIL; 1397 goto nisent_out; 1398 } 1399 } else { /* new search */ 1400 if (yp_first(_nis_state.domain, PASSWD_BYNAME(&_nis_state), 1401 &_nis_state.current, &_nis_state.currentlen, 1402 &data, &datalen)) { 1403 rv = NS_UNAVAIL; 1404 goto nisent_out; 1405 } 1406 } 1407 1408 data[datalen] = '\0'; /* clear trailing \n */ 1409 /* validate line */ 1410 if (_nis_parse(data, &_nis_passwd, 1411 _nis_passwdbuf, sizeof(_nis_passwdbuf), &_nis_state)) 1412 rv = NS_SUCCESS; 1413 else { /* dodgy entry, try again */ 1414 free(data); 1415 goto next_nis_entry; 1416 } 1417 1418 nisent_out: 1419 if (key) 1420 free(key); 1421 if (data) 1422 free(data); 1423 if (rv == NS_SUCCESS) 1424 *retval = &_nis_passwd; 1425 return rv; 1426 } 1427 1428 /*ARGSUSED*/ 1429 static int 1430 _nis_getpwent_r(void *nsrv, void *nscb, va_list ap) 1431 { 1432 int *retval = va_arg(ap, int *); 1433 struct passwd *pw = va_arg(ap, struct passwd *); 1434 char *buffer = va_arg(ap, char *); 1435 size_t buflen = va_arg(ap, size_t); 1436 struct passwd **result = va_arg(ap, struct passwd **); 1437 1438 char *key, *data; 1439 int keylen, datalen, rv, nisr; 1440 1441 _DIAGASSERT(retval != NULL); 1442 _DIAGASSERT(pw != NULL); 1443 _DIAGASSERT(buffer != NULL); 1444 _DIAGASSERT(result != NULL); 1445 1446 *retval = 0; 1447 1448 if (_nis_state.done) /* exhausted search */ 1449 return NS_NOTFOUND; 1450 if (_nis_state.domain == NULL) { 1451 /* only start if NIS not setup */ 1452 rv = _nis_start(&_nis_state); 1453 if (rv != NS_SUCCESS) 1454 return rv; 1455 } 1456 1457 next_nis_entry: 1458 key = NULL; 1459 data = NULL; 1460 rv = NS_NOTFOUND; 1461 1462 if (_nis_state.current) { /* already searching */ 1463 nisr = yp_next(_nis_state.domain, PASSWD_BYNAME(&_nis_state), 1464 _nis_state.current, _nis_state.currentlen, 1465 &key, &keylen, &data, &datalen); 1466 free(_nis_state.current); 1467 _nis_state.current = NULL; 1468 switch (nisr) { 1469 case 0: 1470 _nis_state.current = key; 1471 _nis_state.currentlen = keylen; 1472 key = NULL; 1473 break; 1474 case YPERR_NOMORE: 1475 _nis_state.done = 1; 1476 goto nisent_out; 1477 default: 1478 rv = NS_UNAVAIL; 1479 goto nisent_out; 1480 } 1481 } else { /* new search */ 1482 if (yp_first(_nis_state.domain, PASSWD_BYNAME(&_nis_state), 1483 &_nis_state.current, &_nis_state.currentlen, 1484 &data, &datalen)) { 1485 rv = NS_UNAVAIL; 1486 goto nisent_out; 1487 } 1488 } 1489 1490 data[datalen] = '\0'; /* clear trailing \n */ 1491 /* validate line */ 1492 if (_nis_parse(data, pw, buffer, buflen, &_nis_state)) 1493 rv = NS_SUCCESS; 1494 else { /* dodgy entry, try again */ 1495 if (key) 1496 free(key); 1497 free(data); 1498 goto next_nis_entry; 1499 } 1500 1501 nisent_out: 1502 if (key) 1503 free(key); 1504 if (data) 1505 free(data); 1506 if (rv == NS_SUCCESS) 1507 *result = pw; 1508 else 1509 *result = NULL; 1510 return rv; 1511 } 1512 1513 /*ARGSUSED*/ 1514 static int 1515 _nis_getpwuid(void *nsrv, void *nscb, va_list ap) 1516 { 1517 struct passwd **retval = va_arg(ap, struct passwd **); 1518 uid_t uid = va_arg(ap, uid_t); 1519 1520 int rv, rerror; 1521 1522 _DIAGASSERT(retval != NULL); 1523 1524 *retval = NULL; 1525 rv = _nis_start(&_nis_state); 1526 if (rv != NS_SUCCESS) 1527 return rv; 1528 snprintf(_nis_passwdbuf, sizeof(_nis_passwdbuf), "%u", (unsigned int)uid); 1529 rv = _nis_pwscan(&rerror, &_nis_passwd, 1530 _nis_passwdbuf, sizeof(_nis_passwdbuf), 1531 &_nis_state, __nis_pw_u_map); 1532 if (!_nis_state.stayopen) 1533 _nis_end(&_nis_state); 1534 if (rv == NS_SUCCESS && uid == _nis_passwd.pw_uid) 1535 *retval = &_nis_passwd; 1536 return rv; 1537 } 1538 1539 /*ARGSUSED*/ 1540 static int 1541 _nis_getpwuid_r(void *nsrv, void *nscb, va_list ap) 1542 { 1543 int *retval = va_arg(ap, int *); 1544 uid_t uid = va_arg(ap, uid_t); 1545 struct passwd *pw = va_arg(ap, struct passwd *); 1546 char *buffer = va_arg(ap, char *); 1547 size_t buflen = va_arg(ap, size_t); 1548 struct passwd **result = va_arg(ap, struct passwd **); 1549 1550 struct nis_state state; 1551 int rv; 1552 1553 _DIAGASSERT(retval != NULL); 1554 _DIAGASSERT(pw != NULL); 1555 _DIAGASSERT(buffer != NULL); 1556 _DIAGASSERT(result != NULL); 1557 1558 *result = NULL; 1559 snprintf(buffer, buflen, "%u", (unsigned int)uid); 1560 /* remark: we run under a global mutex inside of this module ... */ 1561 if (_nis_state.stayopen) 1562 { /* use global state only if stayopen is set - otherwise we would blow up getpwent_r() ... */ 1563 rv = _nis_pwscan(retval, pw, buffer, buflen, 1564 &_nis_state, __nis_pw_u_map); 1565 } 1566 else 1567 { /* keep old semantic if no stayopen set - no need to call _nis_start() here - _nis_pwscan() will do it for us ... */ 1568 /* use same way as in getgrent.c ... */ 1569 memset(&state, 0, sizeof(state)); 1570 rv = _nis_pwscan(retval, pw, buffer, buflen, 1571 &state, __nis_pw_u_map); 1572 _nis_end(&state); 1573 } 1574 if (rv != NS_SUCCESS) 1575 return rv; 1576 if (uid == pw->pw_uid) { 1577 *result = pw; 1578 return NS_SUCCESS; 1579 } else 1580 return NS_NOTFOUND; 1581 } 1582 1583 /*ARGSUSED*/ 1584 static int 1585 _nis_getpwnam(void *nsrv, void *nscb, va_list ap) 1586 { 1587 struct passwd **retval = va_arg(ap, struct passwd **); 1588 const char *name = va_arg(ap, const char *); 1589 1590 int rv, rerror; 1591 1592 _DIAGASSERT(retval != NULL); 1593 1594 *retval = NULL; 1595 rv = _nis_start(&_nis_state); 1596 if (rv != NS_SUCCESS) 1597 return rv; 1598 snprintf(_nis_passwdbuf, sizeof(_nis_passwdbuf), "%s", name); 1599 rv = _nis_pwscan(&rerror, &_nis_passwd, 1600 _nis_passwdbuf, sizeof(_nis_passwdbuf), 1601 &_nis_state, __nis_pw_n_map); 1602 if (!_nis_state.stayopen) 1603 _nis_end(&_nis_state); 1604 if (rv == NS_SUCCESS && strcmp(name, _nis_passwd.pw_name) == 0) 1605 *retval = &_nis_passwd; 1606 return rv; 1607 } 1608 1609 /*ARGSUSED*/ 1610 static int 1611 _nis_getpwnam_r(void *nsrv, void *nscb, va_list ap) 1612 { 1613 int *retval = va_arg(ap, int *); 1614 const char *name = va_arg(ap, const char *); 1615 struct passwd *pw = va_arg(ap, struct passwd *); 1616 char *buffer = va_arg(ap, char *); 1617 size_t buflen = va_arg(ap, size_t); 1618 struct passwd **result = va_arg(ap, struct passwd **); 1619 1620 struct nis_state state; 1621 int rv; 1622 1623 _DIAGASSERT(retval != NULL); 1624 _DIAGASSERT(pw != NULL); 1625 _DIAGASSERT(buffer != NULL); 1626 _DIAGASSERT(result != NULL); 1627 1628 *result = NULL; 1629 snprintf(buffer, buflen, "%s", name); 1630 /* remark: we run under a global mutex inside of this module ... */ 1631 if (_nis_state.stayopen) 1632 { /* use global state only if stayopen is set - otherwise we would blow up getpwent_r() ... */ 1633 rv = _nis_pwscan(retval, pw, buffer, buflen, 1634 &_nis_state, __nis_pw_n_map); 1635 } 1636 else 1637 { /* keep old semantic if no stayopen set - no need to call _nis_start() here - _nis_pwscan() will do it for us ... */ 1638 /* use same way as in getgrent.c ... */ 1639 memset(&state, 0, sizeof(state)); 1640 rv = _nis_pwscan(retval, pw, buffer, buflen, 1641 &state, __nis_pw_n_map); 1642 _nis_end(&state); 1643 } 1644 if (rv != NS_SUCCESS) 1645 return rv; 1646 if (strcmp(name, pw->pw_name) == 0) { 1647 *result = pw; 1648 return NS_SUCCESS; 1649 } else 1650 return NS_NOTFOUND; 1651 } 1652 1653 #endif /* YP */ 1654 1655 1656 #ifdef _PASSWD_COMPAT 1657 /* 1658 * compat methods 1659 */ 1660 1661 /* state shared between compat methods */ 1662 1663 struct compat_state { 1664 int stayopen; /* see getpassent(3) */ 1665 DB *db; /* passwd DB */ 1666 int keynum; /* key counter, -1 if no more */ 1667 enum { /* current compat mode */ 1668 COMPAT_NOTOKEN = 0, /* no compat token present */ 1669 COMPAT_NONE, /* parsing normal pwd.db line */ 1670 COMPAT_FULL, /* parsing `+' entries */ 1671 COMPAT_USER, /* parsing `+name' entries */ 1672 COMPAT_NETGROUP /* parsing `+@netgroup' entries */ 1673 } mode; 1674 char *user; /* COMPAT_USER "+name" */ 1675 DB *exclude; /* compat exclude DB */ 1676 struct passwd proto; /* proto passwd entry */ 1677 char protobuf[_GETPW_R_SIZE_MAX]; 1678 /* buffer for proto ptrs */ 1679 int protoflags; /* proto passwd flags */ 1680 int version; 1681 }; 1682 1683 static struct compat_state _compat_state; 1684 /* storage for non _r functions */ 1685 static struct passwd _compat_passwd; 1686 static char _compat_passwdbuf[_GETPW_R_SIZE_MAX]; 1687 1688 static int 1689 _compat_start(struct compat_state *state) 1690 { 1691 int rv; 1692 1693 _DIAGASSERT(state != NULL); 1694 1695 state->keynum = 0; 1696 if (state->db == NULL) { /* not open yet */ 1697 DBT key, data; 1698 DBT pkey, pdata; 1699 char bf[MAXLOGNAME]; 1700 1701 rv = _pw_opendb(&state->db, &state->version); 1702 if (rv != NS_SUCCESS) 1703 return rv; 1704 1705 state->mode = COMPAT_NOTOKEN; 1706 1707 /* 1708 * Determine if the "compat" token is present in pwd.db; 1709 * either "__YP!" or PW_KEYBYNAME+"+". 1710 * Only works if pwd_mkdb installs the token. 1711 */ 1712 key.data = (u_char *)__UNCONST(__yp_token); 1713 key.size = strlen(__yp_token); 1714 1715 bf[0] = _PW_KEYBYNAME; /* Pre-token database support. */ 1716 bf[1] = '+'; 1717 pkey.data = (u_char *)bf; 1718 pkey.size = 2; 1719 1720 if ((state->db->get)(state->db, &key, &data, 0) == 0 1721 || (state->db->get)(state->db, &pkey, &pdata, 0) == 0) 1722 state->mode = COMPAT_NONE; 1723 } 1724 return NS_SUCCESS; 1725 } 1726 1727 static int 1728 _compat_end(struct compat_state *state) 1729 { 1730 1731 _DIAGASSERT(state != NULL); 1732 1733 state->keynum = 0; 1734 if (state->db) { 1735 (void)(state->db->close)(state->db); 1736 state->db = NULL; 1737 } 1738 state->mode = COMPAT_NOTOKEN; 1739 if (state->user) 1740 free(state->user); 1741 state->user = NULL; 1742 if (state->exclude != NULL) 1743 (void)(state->exclude->close)(state->exclude); 1744 state->exclude = NULL; 1745 state->proto.pw_name = NULL; 1746 state->protoflags = 0; 1747 return NS_SUCCESS; 1748 } 1749 1750 /* 1751 * _compat_add_exclude 1752 * add the name to the exclude list in state->exclude. 1753 */ 1754 static int 1755 _compat_add_exclude(struct compat_state *state, const char *name) 1756 { 1757 DBT key, data; 1758 1759 _DIAGASSERT(state != NULL); 1760 _DIAGASSERT(name != NULL); 1761 1762 /* initialize the exclusion table if needed */ 1763 if (state->exclude == NULL) { 1764 state->exclude = dbopen(NULL, O_RDWR, 600, DB_HASH, NULL); 1765 if (state->exclude == NULL) 1766 return 0; 1767 } 1768 1769 key.size = strlen(name); /* set up the key */ 1770 key.data = (u_char *)__UNCONST(name); 1771 1772 data.data = NULL; /* data is nothing */ 1773 data.size = 0; 1774 1775 /* store it */ 1776 if ((state->exclude->put)(state->exclude, &key, &data, 0) == -1) 1777 return 0; 1778 1779 return 1; 1780 } 1781 1782 /* 1783 * _compat_is_excluded 1784 * test if a name is on the compat mode exclude list 1785 */ 1786 static int 1787 _compat_is_excluded(struct compat_state *state, const char *name) 1788 { 1789 DBT key, data; 1790 1791 _DIAGASSERT(state != NULL); 1792 _DIAGASSERT(name != NULL); 1793 1794 if (state->exclude == NULL) 1795 return 0; /* nothing excluded */ 1796 1797 key.size = strlen(name); /* set up the key */ 1798 key.data = (u_char *)__UNCONST(name); 1799 1800 if ((state->exclude->get)(state->exclude, &key, &data, 0) == 0) 1801 return 1; /* is excluded */ 1802 1803 return 0; 1804 } 1805 1806 1807 /* 1808 * _passwdcompat_bad 1809 * log an error if "files" or "compat" is specified in 1810 * passwd_compat database 1811 */ 1812 /*ARGSUSED*/ 1813 static int 1814 _passwdcompat_bad(void *nsrv, void *nscb, va_list ap) 1815 { 1816 static int warned; 1817 1818 _DIAGASSERT(nsrv != NULL); 1819 _DIAGASSERT(nscb != NULL); 1820 1821 if (!warned) { 1822 syslog(LOG_ERR, 1823 "nsswitch.conf passwd_compat database can't use '%s'", 1824 (char *)nscb); 1825 } 1826 warned = 1; 1827 return NS_UNAVAIL; 1828 } 1829 1830 /* 1831 * _passwdcompat_setpassent 1832 * Call setpassent for all passwd_compat sources. 1833 */ 1834 static int 1835 _passwdcompat_setpassent(int stayopen) 1836 { 1837 static const ns_dtab dtab[] = { 1838 NS_FILES_CB(_passwdcompat_bad, "files") 1839 NS_DNS_CB(_dns_setpassent, NULL) 1840 NS_NIS_CB(_nis_setpassent, NULL) 1841 NS_COMPAT_CB(_passwdcompat_bad, "compat") 1842 NS_NULL_CB 1843 }; 1844 1845 int rv, result; 1846 1847 rv = nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "setpassent", 1848 __nsdefaultnis_forceall, &result, stayopen); 1849 return rv; 1850 } 1851 1852 /* 1853 * _passwdcompat_endpwent 1854 * Call endpwent for all passwd_compat sources. 1855 */ 1856 static int 1857 _passwdcompat_endpwent(void) 1858 { 1859 static const ns_dtab dtab[] = { 1860 NS_FILES_CB(_passwdcompat_bad, "files") 1861 NS_DNS_CB(_dns_endpwent, NULL) 1862 NS_NIS_CB(_nis_endpwent, NULL) 1863 NS_COMPAT_CB(_passwdcompat_bad, "compat") 1864 NS_NULL_CB 1865 }; 1866 1867 return nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "endpwent", 1868 __nsdefaultnis_forceall); 1869 } 1870 1871 /* 1872 * _passwdcompat_pwscan 1873 * When a name lookup in compat mode is required (e.g., `+name', or a 1874 * name in `+@netgroup'), look it up in the 'passwd_compat' nsswitch 1875 * database. 1876 * Fail if passwd_compat contains files or compat. 1877 */ 1878 static int 1879 _passwdcompat_pwscan(struct passwd *pw, char *buffer, size_t buflen, 1880 int search, const char *name, uid_t uid) 1881 { 1882 static const ns_dtab compatentdtab[] = { 1883 NS_FILES_CB(_passwdcompat_bad, "files") 1884 NS_DNS_CB(_dns_getpwent_r, NULL) 1885 NS_NIS_CB(_nis_getpwent_r, NULL) 1886 NS_COMPAT_CB(_passwdcompat_bad, "compat") 1887 NS_NULL_CB 1888 }; 1889 static const ns_dtab compatuiddtab[] = { 1890 NS_FILES_CB(_passwdcompat_bad, "files") 1891 NS_DNS_CB(_dns_getpwuid_r, NULL) 1892 NS_NIS_CB(_nis_getpwuid_r, NULL) 1893 NS_COMPAT_CB(_passwdcompat_bad, "compat") 1894 NS_NULL_CB 1895 }; 1896 static const ns_dtab compatnamdtab[] = { 1897 NS_FILES_CB(_passwdcompat_bad, "files") 1898 NS_DNS_CB(_dns_getpwnam_r, NULL) 1899 NS_NIS_CB(_nis_getpwnam_r, NULL) 1900 NS_COMPAT_CB(_passwdcompat_bad, "compat") 1901 NS_NULL_CB 1902 }; 1903 1904 int rv, crv; 1905 struct passwd *cpw; 1906 1907 switch (search) { 1908 case _PW_KEYBYNUM: 1909 rv = nsdispatch(NULL, compatentdtab, 1910 NSDB_PASSWD_COMPAT, "getpwent_r", __nsdefaultnis, 1911 &crv, pw, buffer, buflen, &cpw); 1912 break; 1913 case _PW_KEYBYNAME: 1914 _DIAGASSERT(name != NULL); 1915 rv = nsdispatch(NULL, compatnamdtab, 1916 NSDB_PASSWD_COMPAT, "getpwnam_r", __nsdefaultnis, 1917 &crv, name, pw, buffer, buflen, &cpw); 1918 break; 1919 case _PW_KEYBYUID: 1920 rv = nsdispatch(NULL, compatuiddtab, 1921 NSDB_PASSWD_COMPAT, "getpwuid_r", __nsdefaultnis, 1922 &crv, uid, pw, buffer, buflen, &cpw); 1923 break; 1924 default: 1925 abort(); 1926 /*NOTREACHED*/ 1927 } 1928 return rv; 1929 } 1930 1931 /* 1932 * _compat_pwscan 1933 * Search state->db for the next desired entry. 1934 * If search is _PW_KEYBYNUM, look for state->keynum. 1935 * If search is _PW_KEYBYNAME, look for name. 1936 * If search is _PW_KEYBYUID, look for uid. 1937 * Sets *retval to the errno if the result is not NS_SUCCESS 1938 * or NS_NOTFOUND. 1939 */ 1940 static int 1941 _compat_pwscan(int *retval, struct passwd *pw, char *buffer, size_t buflen, 1942 struct compat_state *state, int search, const char *name, uid_t uid) 1943 { 1944 DBT key; 1945 int rv, r, pwflags; 1946 const char *user, *host, *dom; 1947 const void *from; 1948 size_t fromlen; 1949 1950 _DIAGASSERT(retval != NULL); 1951 _DIAGASSERT(pw != NULL); 1952 _DIAGASSERT(buffer != NULL); 1953 _DIAGASSERT(state != NULL); 1954 /* name may be NULL */ 1955 1956 *retval = 0; 1957 1958 if (state->db == NULL) { 1959 rv = _compat_start(state); 1960 if (rv != NS_SUCCESS) 1961 return rv; 1962 } 1963 if (buflen <= 1) { /* buffer too small */ 1964 *retval = ERANGE; 1965 return NS_UNAVAIL; 1966 } 1967 1968 for (;;) { /* loop over pwd.db */ 1969 rv = NS_NOTFOUND; 1970 if (state->mode != COMPAT_NOTOKEN && 1971 state->mode != COMPAT_NONE) { 1972 /* doing a compat lookup */ 1973 struct passwd cpw; 1974 char cbuf[_GETPW_R_SIZE_MAX]; 1975 1976 switch (state->mode) { 1977 1978 case COMPAT_FULL: 1979 /* get next user or lookup by key */ 1980 rv = _passwdcompat_pwscan(&cpw, 1981 cbuf, sizeof(cbuf), search, name, uid); 1982 if (rv != NS_SUCCESS) 1983 state->mode = COMPAT_NONE; 1984 break; 1985 1986 case COMPAT_NETGROUP: 1987 /* XXXREENTRANT: getnetgrent is not thread safe */ 1988 /* get next user from netgroup */ 1989 r = getnetgrent(&host, &user, &dom); 1990 if (r == 0) { /* end of group */ 1991 endnetgrent(); 1992 state->mode = COMPAT_NONE; 1993 break; 1994 } 1995 if (!user || !*user) 1996 break; 1997 rv = _passwdcompat_pwscan(&cpw, 1998 cbuf, sizeof(cbuf), 1999 _PW_KEYBYNAME, user, 0); 2000 break; 2001 2002 case COMPAT_USER: 2003 /* get specific user */ 2004 if (state->user == NULL) { 2005 state->mode = COMPAT_NONE; 2006 break; 2007 } 2008 rv = _passwdcompat_pwscan(&cpw, 2009 cbuf, sizeof(cbuf), 2010 _PW_KEYBYNAME, state->user, 0); 2011 free(state->user); 2012 state->user = NULL; 2013 state->mode = COMPAT_NONE; 2014 break; 2015 2016 case COMPAT_NOTOKEN: 2017 case COMPAT_NONE: 2018 abort(); 2019 2020 } 2021 if (rv != NS_SUCCESS) /* if not matched, next loop */ 2022 continue; 2023 2024 /* copy cpw to pw, applying prototype */ 2025 if (! _pw_copy(&cpw, pw, buffer, buflen, 2026 &state->proto, state->protoflags)) { 2027 rv = NS_UNAVAIL; 2028 break; 2029 } 2030 2031 if (_compat_is_excluded(state, pw->pw_name)) 2032 continue; /* excluded; next loop */ 2033 2034 if ((search == _PW_KEYBYNAME 2035 && strcmp(pw->pw_name, name) != 0) 2036 || (search == _PW_KEYBYUID && pw->pw_uid != uid)) { 2037 continue; /* not specific; next loop */ 2038 } 2039 2040 break; /* exit loop if found */ 2041 } else { /* not a compat line */ 2042 state->proto.pw_name = NULL; 2043 /* clear prototype */ 2044 } 2045 2046 if (state->mode == COMPAT_NOTOKEN) { 2047 /* no compat token; do direct lookup */ 2048 switch (search) { 2049 case _PW_KEYBYNUM: 2050 if (state->keynum == -1) /* no more records */ 2051 return NS_NOTFOUND; 2052 state->keynum++; 2053 from = &state->keynum; 2054 fromlen = sizeof(state->keynum); 2055 break; 2056 case _PW_KEYBYNAME: 2057 from = name; 2058 fromlen = strlen(name); 2059 break; 2060 case _PW_KEYBYUID: 2061 from = &uid; 2062 fromlen = sizeof(uid); 2063 break; 2064 default: 2065 abort(); 2066 } 2067 buffer[0] = search; 2068 } else { 2069 /* compat token; do line by line */ 2070 if (state->keynum == -1) /* no more records */ 2071 return NS_NOTFOUND; 2072 state->keynum++; 2073 from = &state->keynum; 2074 fromlen = sizeof(state->keynum); 2075 buffer[0] = _PW_KEYBYNUM; 2076 } 2077 2078 if (buflen <= fromlen) { /* buffer too small */ 2079 *retval = ERANGE; 2080 return NS_UNAVAIL; 2081 } 2082 memmove(buffer + 1, from, fromlen); /* setup key */ 2083 key.size = fromlen + 1; 2084 key.data = (u_char *)buffer; 2085 2086 rv = _pw_getkey(state->db, &key, pw, buffer, buflen, &pwflags, 2087 state->version); 2088 if (rv != NS_SUCCESS) /* stop on error */ 2089 break; 2090 2091 if (state->mode == COMPAT_NOTOKEN) 2092 break; /* stop if no compat token */ 2093 2094 if (pw->pw_name[0] == '+') { 2095 /* compat inclusion */ 2096 switch(pw->pw_name[1]) { 2097 case '\0': /* `+' */ 2098 state->mode = COMPAT_FULL; 2099 /* reset passwd_compat search */ 2100 /* XXXREENTRANT: setpassent is not thread safe ? */ 2101 (void) _passwdcompat_setpassent(_compat_state.stayopen); 2102 break; 2103 case '@': /* `+@netgroup' */ 2104 state->mode = COMPAT_NETGROUP; 2105 /* reset netgroup search */ 2106 /* XXXREENTRANT: setnetgrent is not thread safe */ 2107 setnetgrent(pw->pw_name + 2); 2108 break; 2109 default: /* `+name' */ 2110 state->mode = COMPAT_USER; 2111 if (state->user) 2112 free(state->user); 2113 state->user = strdup(pw->pw_name + 1); 2114 break; 2115 } 2116 /* save the prototype */ 2117 state->protoflags = pwflags; 2118 if (! _pw_copy(pw, &state->proto, state->protobuf, 2119 sizeof(state->protobuf), NULL, 0)) { 2120 rv = NS_UNAVAIL; 2121 break; 2122 } 2123 continue; /* loop again after inclusion */ 2124 } else if (pw->pw_name[0] == '-') { 2125 /* compat exclusion */ 2126 rv = NS_SUCCESS; 2127 switch(pw->pw_name[1]) { 2128 case '\0': /* `-' */ 2129 break; 2130 case '@': /* `-@netgroup' */ 2131 /* XXXREENTRANT: {set,get,end}netgrent is not thread safe */ 2132 setnetgrent(pw->pw_name + 2); 2133 while (getnetgrent(&host, &user, &dom)) { 2134 if (!user || !*user) 2135 continue; 2136 if (! _compat_add_exclude(state,user)) { 2137 rv = NS_UNAVAIL; 2138 break; 2139 } 2140 } 2141 endnetgrent(); 2142 break; 2143 default: /* `-name' */ 2144 if (! _compat_add_exclude(state, 2145 pw->pw_name + 1)) { 2146 rv = NS_UNAVAIL; 2147 } 2148 break; 2149 } 2150 if (rv != NS_SUCCESS) /* exclusion failure */ 2151 break; 2152 continue; /* loop again after exclusion */ 2153 } 2154 if (search == _PW_KEYBYNUM || 2155 (search == _PW_KEYBYUID && pw->pw_uid == uid) || 2156 (search == _PW_KEYBYNAME && strcmp(pw->pw_name, name) == 0)) 2157 break; /* token mode match found */ 2158 } 2159 2160 if (rv == NS_NOTFOUND && 2161 (search == _PW_KEYBYNUM || state->mode != COMPAT_NOTOKEN)) 2162 state->keynum = -1; /* flag `no more records' */ 2163 2164 if (rv == NS_SUCCESS) { 2165 if ((search == _PW_KEYBYNAME && strcmp(pw->pw_name, name) != 0) 2166 || (search == _PW_KEYBYUID && pw->pw_uid != uid)) 2167 rv = NS_NOTFOUND; 2168 } 2169 2170 if (rv != NS_SUCCESS && rv != NS_NOTFOUND) 2171 *retval = errno; 2172 return rv; 2173 } 2174 2175 /*ARGSUSED*/ 2176 static int 2177 _compat_setpwent(void *nsrv, void *nscb, va_list ap) 2178 { 2179 2180 /* force passwd_compat setpwent() */ 2181 (void) _passwdcompat_setpassent(0); 2182 2183 /* reset state, keep db open */ 2184 _compat_state.stayopen = 0; 2185 return _compat_start(&_compat_state); 2186 } 2187 2188 /*ARGSUSED*/ 2189 static int 2190 _compat_setpassent(void *nsrv, void *nscb, va_list ap) 2191 { 2192 int *retval = va_arg(ap, int *); 2193 int stayopen = va_arg(ap, int); 2194 2195 int rv; 2196 2197 /* force passwd_compat setpassent() */ 2198 (void) _passwdcompat_setpassent(stayopen); 2199 2200 _compat_state.stayopen = stayopen; 2201 rv = _compat_start(&_compat_state); 2202 *retval = (rv == NS_SUCCESS); 2203 return rv; 2204 } 2205 2206 /*ARGSUSED*/ 2207 static int 2208 _compat_endpwent(void *nsrv, void *nscb, va_list ap) 2209 { 2210 2211 /* force passwd_compat endpwent() */ 2212 (void) _passwdcompat_endpwent(); 2213 2214 /* reset state, close db */ 2215 _compat_state.stayopen = 0; 2216 return _compat_end(&_compat_state); 2217 } 2218 2219 2220 /*ARGSUSED*/ 2221 static int 2222 _compat_getpwent(void *nsrv, void *nscb, va_list ap) 2223 { 2224 struct passwd **retval = va_arg(ap, struct passwd **); 2225 2226 int rv, rerror; 2227 2228 _DIAGASSERT(retval != NULL); 2229 2230 *retval = NULL; 2231 rv = _compat_pwscan(&rerror, &_compat_passwd, 2232 _compat_passwdbuf, sizeof(_compat_passwdbuf), 2233 &_compat_state, _PW_KEYBYNUM, NULL, 0); 2234 if (rv == NS_SUCCESS) 2235 *retval = &_compat_passwd; 2236 return rv; 2237 } 2238 2239 /*ARGSUSED*/ 2240 static int 2241 _compat_getpwent_r(void *nsrv, void *nscb, va_list ap) 2242 { 2243 int *retval = va_arg(ap, int *); 2244 struct passwd *pw = va_arg(ap, struct passwd *); 2245 char *buffer = va_arg(ap, char *); 2246 size_t buflen = va_arg(ap, size_t); 2247 struct passwd **result = va_arg(ap, struct passwd **); 2248 2249 int rv; 2250 2251 _DIAGASSERT(retval != NULL); 2252 _DIAGASSERT(pw != NULL); 2253 _DIAGASSERT(buffer != NULL); 2254 _DIAGASSERT(result != NULL); 2255 2256 rv = _compat_pwscan(retval, pw, buffer, buflen, &_compat_state, 2257 _PW_KEYBYNUM, NULL, 0); 2258 if (rv == NS_SUCCESS) 2259 *result = pw; 2260 else 2261 *result = NULL; 2262 return rv; 2263 } 2264 2265 2266 /*ARGSUSED*/ 2267 static int 2268 _compat_getpwnam(void *nsrv, void *nscb, va_list ap) 2269 { 2270 struct passwd **retval = va_arg(ap, struct passwd **); 2271 const char *name = va_arg(ap, const char *); 2272 2273 int rv, rerror; 2274 2275 _DIAGASSERT(retval != NULL); 2276 2277 *retval = NULL; 2278 rv = _compat_start(&_compat_state); 2279 if (rv != NS_SUCCESS) 2280 return rv; 2281 rv = _compat_pwscan(&rerror, &_compat_passwd, 2282 _compat_passwdbuf, sizeof(_compat_passwdbuf), 2283 &_compat_state, _PW_KEYBYNAME, name, 0); 2284 if (!_compat_state.stayopen) 2285 _compat_end(&_compat_state); 2286 if (rv == NS_SUCCESS) 2287 *retval = &_compat_passwd; 2288 return rv; 2289 } 2290 2291 /*ARGSUSED*/ 2292 static int 2293 _compat_getpwnam_r(void *nsrv, void *nscb, va_list ap) 2294 { 2295 int *retval = va_arg(ap, int *); 2296 const char *name = va_arg(ap, const char *); 2297 struct passwd *pw = va_arg(ap, struct passwd *); 2298 char *buffer = va_arg(ap, char *); 2299 size_t buflen = va_arg(ap, size_t); 2300 struct passwd **result = va_arg(ap, struct passwd **); 2301 2302 struct compat_state state; 2303 int rv; 2304 2305 _DIAGASSERT(retval != NULL); 2306 _DIAGASSERT(pw != NULL); 2307 _DIAGASSERT(buffer != NULL); 2308 _DIAGASSERT(result != NULL); 2309 2310 *result = NULL; 2311 memset(&state, 0, sizeof(state)); 2312 rv = _compat_pwscan(retval, pw, buffer, buflen, &state, 2313 _PW_KEYBYNAME, name, 0); 2314 _compat_end(&state); 2315 if (rv == NS_SUCCESS) 2316 *result = pw; 2317 return rv; 2318 } 2319 2320 /*ARGSUSED*/ 2321 static int 2322 _compat_getpwuid(void *nsrv, void *nscb, va_list ap) 2323 { 2324 struct passwd **retval = va_arg(ap, struct passwd **); 2325 uid_t uid = va_arg(ap, uid_t); 2326 2327 int rv, rerror; 2328 2329 _DIAGASSERT(retval != NULL); 2330 2331 *retval = NULL; 2332 rv = _compat_start(&_compat_state); 2333 if (rv != NS_SUCCESS) 2334 return rv; 2335 rv = _compat_pwscan(&rerror, &_compat_passwd, 2336 _compat_passwdbuf, sizeof(_compat_passwdbuf), 2337 &_compat_state, _PW_KEYBYUID, NULL, uid); 2338 if (!_compat_state.stayopen) 2339 _compat_end(&_compat_state); 2340 if (rv == NS_SUCCESS) 2341 *retval = &_compat_passwd; 2342 return rv; 2343 } 2344 2345 /*ARGSUSED*/ 2346 static int 2347 _compat_getpwuid_r(void *nsrv, void *nscb, va_list ap) 2348 { 2349 int *retval = va_arg(ap, int *); 2350 uid_t uid = va_arg(ap, uid_t); 2351 struct passwd *pw = va_arg(ap, struct passwd *); 2352 char *buffer = va_arg(ap, char *); 2353 size_t buflen = va_arg(ap, size_t); 2354 struct passwd **result = va_arg(ap, struct passwd **); 2355 2356 struct compat_state state; 2357 int rv; 2358 2359 _DIAGASSERT(retval != NULL); 2360 _DIAGASSERT(pw != NULL); 2361 _DIAGASSERT(buffer != NULL); 2362 _DIAGASSERT(result != NULL); 2363 2364 *result = NULL; 2365 memset(&state, 0, sizeof(state)); 2366 rv = _compat_pwscan(retval, pw, buffer, buflen, &state, 2367 _PW_KEYBYUID, NULL, uid); 2368 _compat_end(&state); 2369 if (rv == NS_SUCCESS) 2370 *result = pw; 2371 return rv; 2372 } 2373 2374 #endif /* _PASSWD_COMPAT */ 2375 2376 2377 /* 2378 * public functions 2379 */ 2380 2381 struct passwd * 2382 getpwent(void) 2383 { 2384 int r; 2385 struct passwd *retval; 2386 2387 static const ns_dtab dtab[] = { 2388 NS_FILES_CB(_files_getpwent, NULL) 2389 NS_DNS_CB(_dns_getpwent, NULL) 2390 NS_NIS_CB(_nis_getpwent, NULL) 2391 NS_COMPAT_CB(_compat_getpwent, NULL) 2392 NS_NULL_CB 2393 }; 2394 2395 mutex_lock(&_pwmutex); 2396 r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwent", __nsdefaultcompat, 2397 &retval); 2398 mutex_unlock(&_pwmutex); 2399 return (r == NS_SUCCESS) ? retval : NULL; 2400 } 2401 2402 int 2403 getpwent_r(struct passwd *pwd, char *buffer, size_t buflen, 2404 struct passwd **result) 2405 { 2406 int r, retval; 2407 2408 static const ns_dtab dtab[] = { 2409 NS_FILES_CB(_files_getpwent_r, NULL) 2410 NS_DNS_CB(_dns_getpwent_r, NULL) 2411 NS_NIS_CB(_nis_getpwent_r, NULL) 2412 NS_COMPAT_CB(_compat_getpwent_r, NULL) 2413 NS_NULL_CB 2414 }; 2415 2416 _DIAGASSERT(pwd != NULL); 2417 _DIAGASSERT(buffer != NULL); 2418 _DIAGASSERT(result != NULL); 2419 2420 *result = NULL; 2421 retval = 0; 2422 mutex_lock(&_pwmutex); 2423 r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwent_r", __nsdefaultcompat, 2424 &retval, pwd, buffer, buflen, result); 2425 mutex_unlock(&_pwmutex); 2426 switch (r) { 2427 case NS_SUCCESS: 2428 case NS_NOTFOUND: 2429 return 0; 2430 default: 2431 return retval; 2432 } 2433 } 2434 2435 2436 struct passwd * 2437 getpwnam(const char *name) 2438 { 2439 int rv; 2440 struct passwd *retval; 2441 2442 static const ns_dtab dtab[] = { 2443 NS_FILES_CB(_files_getpwnam, NULL) 2444 NS_DNS_CB(_dns_getpwnam, NULL) 2445 NS_NIS_CB(_nis_getpwnam, NULL) 2446 NS_COMPAT_CB(_compat_getpwnam, NULL) 2447 NS_NULL_CB 2448 }; 2449 2450 mutex_lock(&_pwmutex); 2451 rv = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwnam", __nsdefaultcompat, 2452 &retval, name); 2453 mutex_unlock(&_pwmutex); 2454 return (rv == NS_SUCCESS) ? retval : NULL; 2455 } 2456 2457 int 2458 getpwnam_r(const char *name, struct passwd *pwd, char *buffer, size_t buflen, 2459 struct passwd **result) 2460 { 2461 int r, retval; 2462 2463 static const ns_dtab dtab[] = { 2464 NS_FILES_CB(_files_getpwnam_r, NULL) 2465 NS_DNS_CB(_dns_getpwnam_r, NULL) 2466 NS_NIS_CB(_nis_getpwnam_r, NULL) 2467 NS_COMPAT_CB(_compat_getpwnam_r, NULL) 2468 NS_NULL_CB 2469 }; 2470 2471 _DIAGASSERT(name != NULL); 2472 _DIAGASSERT(pwd != NULL); 2473 _DIAGASSERT(buffer != NULL); 2474 _DIAGASSERT(result != NULL); 2475 2476 *result = NULL; 2477 retval = 0; 2478 mutex_lock(&_pwmutex); 2479 r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwnam_r", __nsdefaultcompat, 2480 &retval, name, pwd, buffer, buflen, result); 2481 mutex_unlock(&_pwmutex); 2482 switch (r) { 2483 case NS_SUCCESS: 2484 case NS_NOTFOUND: 2485 return 0; 2486 default: 2487 return retval; 2488 } 2489 } 2490 2491 struct passwd * 2492 getpwuid(uid_t uid) 2493 { 2494 int rv; 2495 struct passwd *retval; 2496 2497 static const ns_dtab dtab[] = { 2498 NS_FILES_CB(_files_getpwuid, NULL) 2499 NS_DNS_CB(_dns_getpwuid, NULL) 2500 NS_NIS_CB(_nis_getpwuid, NULL) 2501 NS_COMPAT_CB(_compat_getpwuid, NULL) 2502 NS_NULL_CB 2503 }; 2504 2505 mutex_lock(&_pwmutex); 2506 rv = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwuid", __nsdefaultcompat, 2507 &retval, uid); 2508 mutex_unlock(&_pwmutex); 2509 return (rv == NS_SUCCESS) ? retval : NULL; 2510 } 2511 2512 int 2513 getpwuid_r(uid_t uid, struct passwd *pwd, char *buffer, size_t buflen, 2514 struct passwd **result) 2515 { 2516 int r, retval; 2517 2518 static const ns_dtab dtab[] = { 2519 NS_FILES_CB(_files_getpwuid_r, NULL) 2520 NS_DNS_CB(_dns_getpwuid_r, NULL) 2521 NS_NIS_CB(_nis_getpwuid_r, NULL) 2522 NS_COMPAT_CB(_compat_getpwuid_r, NULL) 2523 NS_NULL_CB 2524 }; 2525 2526 _DIAGASSERT(pwd != NULL); 2527 _DIAGASSERT(buffer != NULL); 2528 _DIAGASSERT(result != NULL); 2529 2530 *result = NULL; 2531 retval = 0; 2532 mutex_lock(&_pwmutex); 2533 r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwuid_r", __nsdefaultcompat, 2534 &retval, uid, pwd, buffer, buflen, result); 2535 mutex_unlock(&_pwmutex); 2536 switch (r) { 2537 case NS_SUCCESS: 2538 case NS_NOTFOUND: 2539 return 0; 2540 default: 2541 return retval; 2542 } 2543 } 2544 2545 void 2546 endpwent(void) 2547 { 2548 static const ns_dtab dtab[] = { 2549 NS_FILES_CB(_files_endpwent, NULL) 2550 NS_DNS_CB(_dns_endpwent, NULL) 2551 NS_NIS_CB(_nis_endpwent, NULL) 2552 NS_COMPAT_CB(_compat_endpwent, NULL) 2553 NS_NULL_CB 2554 }; 2555 2556 mutex_lock(&_pwmutex); 2557 /* force all endpwent() methods */ 2558 (void) nsdispatch(NULL, dtab, NSDB_PASSWD, "endpwent", 2559 __nsdefaultcompat_forceall); 2560 mutex_unlock(&_pwmutex); 2561 } 2562 2563 /*ARGSUSED*/ 2564 int 2565 setpassent(int stayopen) 2566 { 2567 static const ns_dtab dtab[] = { 2568 NS_FILES_CB(_files_setpassent, NULL) 2569 NS_DNS_CB(_dns_setpassent, NULL) 2570 NS_NIS_CB(_nis_setpassent, NULL) 2571 NS_COMPAT_CB(_compat_setpassent, NULL) 2572 NS_NULL_CB 2573 }; 2574 int rv, retval; 2575 2576 mutex_lock(&_pwmutex); 2577 /* force all setpassent() methods */ 2578 rv = nsdispatch(NULL, dtab, NSDB_PASSWD, "setpassent", 2579 __nsdefaultcompat_forceall, &retval, stayopen); 2580 mutex_unlock(&_pwmutex); 2581 return (rv == NS_SUCCESS) ? retval : 0; 2582 } 2583 2584 void 2585 setpwent(void) 2586 { 2587 static const ns_dtab dtab[] = { 2588 NS_FILES_CB(_files_setpwent, NULL) 2589 NS_DNS_CB(_dns_setpwent, NULL) 2590 NS_NIS_CB(_nis_setpwent, NULL) 2591 NS_COMPAT_CB(_compat_setpwent, NULL) 2592 NS_NULL_CB 2593 }; 2594 2595 mutex_lock(&_pwmutex); 2596 /* force all setpwent() methods */ 2597 (void) nsdispatch(NULL, dtab, NSDB_PASSWD, "setpwent", 2598 __nsdefaultcompat_forceall); 2599 mutex_unlock(&_pwmutex); 2600 } 2601
Indexes created Mon Sep 22 13:09:51 GMT 2025