1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)getpwent.c 8.2 (Berkeley) 4/27/95"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <stdio.h> 39 #include <sys/param.h> 40 #include <fcntl.h> 41 #include <db.h> 42 #include <syslog.h> 43 #include <pwd.h> 44 #include <utmp.h> 45 #include <errno.h> 46 #include <unistd.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <limits.h> 50 #include <grp.h> 51 52 extern void setnetgrent __P(( char * )); 53 extern int getnetgrent __P(( char **, char **, char ** )); 54 extern int innetgr __P(( const char *, const char *, const char *, const char * )); 55 56 /* 57 * The lookup techniques and data extraction code here must be kept 58 * in sync with that in `pwd_mkdb'. 59 */ 60 61 static struct passwd _pw_passwd; /* password structure */ 62 static DB *_pw_db; /* password database */ 63 static int _pw_keynum; /* key counter */ 64 static int _pw_stayopen; /* keep fd's open */ 65 #ifdef YP 66 #include <rpc/rpc.h> 67 #include <rpcsvc/yp_prot.h> 68 #include <rpcsvc/ypclnt.h> 69 70 static struct passwd _pw_copy; 71 static DBT empty = { NULL, 0 }; 72 static DB *_ypcache = (DB *)NULL; 73 static int _yp_exclusions = 0; 74 static int _yp_enabled = -1; 75 static int _pw_stepping_yp; /* set true when stepping thru map */ 76 static char _ypnam[YPMAXRECORD]; 77 #define YP_HAVE_MASTER 2 78 #define YP_HAVE_ADJUNCT 1 79 #define YP_HAVE_NONE 0 80 static int _gotmaster; 81 static char *_pw_yp_domain; 82 static inline int unwind __P(( char * )); 83 static void _ypinitdb __P(( void )); 84 static int _havemaster __P((char *)); 85 static int _getyppass __P((struct passwd *, const char *, const char * )); 86 static int _nextyppass __P((struct passwd *)); 87 static inline int lookup __P((const char *)); 88 static inline void store __P((const char *)); 89 static inline int ingr __P((const char *, const char*)); 90 static inline int verf __P((const char *)); 91 static char * _get_adjunct_pw __P((const char *)); 92 #endif 93 static int __hashpw(DBT *); 94 static int __initdb(void); 95 96 struct passwd * 97 getpwent() 98 { 99 DBT key; 100 char bf[sizeof(_pw_keynum) + 1]; 101 int rv; 102 103 if (!_pw_db && !__initdb()) 104 return((struct passwd *)NULL); 105 106 #ifdef YP 107 if(_pw_stepping_yp) { 108 _pw_passwd = _pw_copy; 109 if (unwind((char *)&_ypnam)) 110 return(&_pw_passwd); 111 } 112 #endif 113 tryagain: 114 115 ++_pw_keynum; 116 bf[0] = _PW_KEYBYNUM; 117 bcopy((char *)&_pw_keynum, bf + 1, sizeof(_pw_keynum)); 118 key.data = (u_char *)bf; 119 key.size = sizeof(_pw_keynum) + 1; 120 rv = __hashpw(&key); 121 if(!rv) return (struct passwd *)NULL; 122 #ifdef YP 123 if(_pw_passwd.pw_name[0] == '+' || _pw_passwd.pw_name[0] == '-') { 124 if (_yp_enabled == -1) 125 _ypinitdb(); 126 bzero((char *)&_ypnam, sizeof(_ypnam)); 127 bcopy(_pw_passwd.pw_name, _ypnam, 128 strlen(_pw_passwd.pw_name)); 129 _pw_copy = _pw_passwd; 130 if (unwind((char *)&_ypnam) == 0) 131 goto tryagain; 132 else 133 return(&_pw_passwd); 134 } 135 #else 136 /* Ignore YP password file entries when YP is disabled. */ 137 if(_pw_passwd.pw_name[0] == '+' || _pw_passwd.pw_name[0] == '-') { 138 goto tryagain; 139 } 140 #endif 141 return(&_pw_passwd); 142 } 143 144 struct passwd * 145 getpwnam(name) 146 const char *name; 147 { 148 DBT key; 149 int len, rval; 150 char bf[UT_NAMESIZE + 2]; 151 152 if (!_pw_db && !__initdb()) 153 return((struct passwd *)NULL); 154 155 bf[0] = _PW_KEYBYNAME; 156 len = strlen(name); 157 if (len > UT_NAMESIZE) 158 return(NULL); 159 bcopy(name, bf + 1, len); 160 key.data = (u_char *)bf; 161 key.size = len + 1; 162 rval = __hashpw(&key); 163 164 #ifdef YP 165 if (!rval) { 166 if (_yp_enabled == -1) 167 _ypinitdb(); 168 if (_yp_enabled) 169 rval = _getyppass(&_pw_passwd, name, "passwd.byname"); 170 } 171 #endif 172 /* 173 * Prevent login attempts when YP is not enabled but YP entries 174 * are in /etc/master.passwd. 175 */ 176 if (rval && (_pw_passwd.pw_name[0] == '+'|| 177 _pw_passwd.pw_name[0] == '-')) rval = 0; 178 179 endpwent(); 180 return(rval ? &_pw_passwd : (struct passwd *)NULL); 181 } 182 183 struct passwd * 184 getpwuid(uid) 185 uid_t uid; 186 { 187 DBT key; 188 int keyuid, rval; 189 char bf[sizeof(keyuid) + 1]; 190 191 if (!_pw_db && !__initdb()) 192 return((struct passwd *)NULL); 193 194 bf[0] = _PW_KEYBYUID; 195 keyuid = uid; 196 bcopy(&keyuid, bf + 1, sizeof(keyuid)); 197 key.data = (u_char *)bf; 198 key.size = sizeof(keyuid) + 1; 199 rval = __hashpw(&key); 200 201 #ifdef YP 202 if (!rval) { 203 if (_yp_enabled == -1) 204 _ypinitdb(); 205 if (_yp_enabled) { 206 char ypbuf[16]; /* big enough for 32-bit uids */ 207 snprintf(ypbuf, sizeof ypbuf, "%u", (unsigned)uid); 208 rval = _getyppass(&_pw_passwd, ypbuf, "passwd.byuid"); 209 } 210 } 211 #endif 212 /* 213 * Prevent login attempts when YP is not enabled but YP entries 214 * are in /etc/master.passwd. 215 */ 216 if (rval && (_pw_passwd.pw_name[0] == '+'|| 217 _pw_passwd.pw_name[0] == '-')) rval = 0; 218 219 endpwent(); 220 return(rval ? &_pw_passwd : (struct passwd *)NULL); 221 } 222 223 int 224 setpassent(stayopen) 225 int stayopen; 226 { 227 _pw_keynum = 0; 228 #ifdef YP 229 _pw_stepping_yp = 0; 230 #endif 231 _pw_stayopen = stayopen; 232 return(1); 233 } 234 235 void 236 setpwent() 237 { 238 (void)setpassent(0); 239 } 240 241 void 242 endpwent() 243 { 244 _pw_keynum = 0; 245 #ifdef YP 246 _pw_stepping_yp = 0; 247 #endif 248 if (_pw_db) { 249 (void)(_pw_db->close)(_pw_db); 250 _pw_db = (DB *)NULL; 251 } 252 #ifdef YP 253 if (_ypcache) { 254 (void)(_ypcache->close)(_ypcache); 255 _ypcache = (DB *)NULL; 256 _yp_exclusions = 0; 257 } 258 /* Fix for PR #12008 */ 259 _yp_enabled = -1; 260 #endif 261 } 262 263 static int 264 __initdb() 265 { 266 static int warned; 267 char *p; 268 269 p = (geteuid()) ? _PATH_MP_DB : _PATH_SMP_DB; 270 _pw_db = dbopen(p, O_RDONLY, 0, DB_HASH, NULL); 271 if (_pw_db) 272 return(1); 273 if (!warned++) 274 syslog(LOG_ERR, "%s: %m", p); 275 return(0); 276 } 277 278 static int 279 __hashpw(key) 280 DBT *key; 281 { 282 register char *p, *t; 283 static u_int max; 284 static char *line; 285 DBT data; 286 287 if ((_pw_db->get)(_pw_db, key, &data, 0)) 288 return(0); 289 p = (char *)data.data; 290 291 /* Increase buffer size for long lines if necessary. */ 292 if (data.size > max) { 293 max = data.size + 1024; 294 if (!(line = reallocf(line, max))) 295 return(0); 296 } 297 298 /* THIS CODE MUST MATCH THAT IN pwd_mkdb. */ 299 t = line; 300 #define EXPAND(e) e = t; while ( (*t++ = *p++) ); 301 #define SCALAR(v) memmove(&(v), p, sizeof v); p += sizeof v 302 EXPAND(_pw_passwd.pw_name); 303 EXPAND(_pw_passwd.pw_passwd); 304 SCALAR(_pw_passwd.pw_uid); 305 SCALAR(_pw_passwd.pw_gid); 306 SCALAR(_pw_passwd.pw_change); 307 EXPAND(_pw_passwd.pw_class); 308 EXPAND(_pw_passwd.pw_gecos); 309 EXPAND(_pw_passwd.pw_dir); 310 EXPAND(_pw_passwd.pw_shell); 311 SCALAR(_pw_passwd.pw_expire); 312 bcopy(p, (char *)&_pw_passwd.pw_fields, sizeof _pw_passwd.pw_fields); 313 p += sizeof _pw_passwd.pw_fields; 314 return(1); 315 } 316 317 #ifdef YP 318 319 static void 320 _ypinitdb() 321 { 322 DBT key, data; 323 char buf[] = { _PW_KEYYPENABLED }; 324 key.data = buf; 325 key.size = 1; 326 _yp_enabled = 0; 327 if ((_pw_db->get)(_pw_db, &key, &data, 0) == 0) { 328 _yp_enabled = (int)*((char *)data.data) - 2; 329 /* Don't even bother with this if we aren't root. */ 330 if (!geteuid()) { 331 if (!_pw_yp_domain) 332 if (yp_get_default_domain(&_pw_yp_domain)) 333 return; 334 _gotmaster = _havemaster(_pw_yp_domain); 335 } else _gotmaster = YP_HAVE_NONE; 336 /* 337 * Create a DB hash database in memory. Bet you didn't know you 338 * could do a dbopen() with a NULL filename, did you. 339 */ 340 if (_ypcache == (DB *)NULL) 341 _ypcache = dbopen(NULL, O_RDWR, 600, DB_HASH, NULL); 342 } 343 } 344 345 /* 346 * See if a user is in the blackballed list. 347 */ 348 static inline int 349 lookup(name) 350 const char *name; 351 { 352 DBT key; 353 354 if (!_yp_exclusions) 355 return(0); 356 357 key.data = (char *)name; 358 key.size = strlen(name); 359 360 if ((_ypcache->get)(_ypcache, &key, &empty, 0)) { 361 return(0); 362 } 363 364 return(1); 365 } 366 367 /* 368 * Store a blackballed user in an in-core hash database. 369 */ 370 static inline void 371 store(key) 372 const char *key; 373 { 374 DBT lkey; 375 /* 376 if (lookup(key)) 377 return; 378 */ 379 380 _yp_exclusions = 1; 381 382 lkey.data = (char *)key; 383 lkey.size = strlen(key); 384 385 (void)(_ypcache->put)(_ypcache, &lkey, &empty, R_NOOVERWRITE); 386 } 387 388 /* 389 * Parse the + entries in the password database and do appropriate 390 * NIS lookups. While ugly to look at, this is optimized to do only 391 * as many lookups as are absolutely necessary in any given case. 392 * Basically, the getpwent() function will feed us + and - lines 393 * as they appear in the database. For + lines, we do netgroup/group 394 * and user lookups to find all usernames that match the rule and 395 * extract them from the NIS passwd maps. For - lines, we save the 396 * matching names in a database and a) exlude them, and b) make sure 397 * we don't consider them when processing other + lines that appear 398 * later. 399 */ 400 static inline int 401 unwind(grp) 402 char *grp; 403 { 404 char *user, *host, *domain; 405 static int latch = 0; 406 static struct group *gr = NULL; 407 int rv = 0; 408 409 if (grp[0] == '+') { 410 if (strlen(grp) == 1) { 411 return(_nextyppass(&_pw_passwd)); 412 } 413 if (grp[1] == '@') { 414 _pw_stepping_yp = 1; 415 grpagain: 416 if (gr != NULL) { 417 if (*gr->gr_mem != NULL) { 418 if (lookup(*gr->gr_mem)) { 419 gr->gr_mem++; 420 goto grpagain; 421 } 422 rv = _getyppass(&_pw_passwd, 423 *gr->gr_mem, 424 "passwd.byname"); 425 gr->gr_mem++; 426 return(rv); 427 } else { 428 endgrent(); 429 latch = 0; 430 gr = NULL; 431 return(0); 432 } 433 } 434 if (!latch) { 435 setnetgrent(grp+2); 436 latch++; 437 } 438 again: 439 if (getnetgrent(&host, &user, &domain) == 0) { 440 if ((gr = getgrnam(grp+2)) != NULL) 441 goto grpagain; 442 latch = 0; 443 _pw_stepping_yp = 0; 444 return(0); 445 } else { 446 if (lookup(user)) 447 goto again; 448 if (_getyppass(&_pw_passwd, user, 449 "passwd.byname")) 450 return(1); 451 else 452 goto again; 453 } 454 } else { 455 if (lookup(grp+1)) 456 return(0); 457 return(_getyppass(&_pw_passwd, grp+1, "passwd.byname")); 458 } 459 } else { 460 if (grp[1] == '@') { 461 setnetgrent(grp+2); 462 rv = 0; 463 while(getnetgrent(&host, &user, &domain) != 0) { 464 store(user); 465 rv++; 466 } 467 if (!rv && (gr = getgrnam(grp+2)) != NULL) { 468 while(*gr->gr_mem) { 469 store(*gr->gr_mem); 470 gr->gr_mem++; 471 } 472 } 473 } else { 474 store(grp+1); 475 } 476 } 477 return(0); 478 } 479 480 /* 481 * See if a user is a member of a particular group. 482 */ 483 static inline int 484 ingr(grp, name) 485 const char *grp; 486 const char *name; 487 { 488 register struct group *gr; 489 490 if ((gr = getgrnam(grp)) == NULL) 491 return(0); 492 493 while(*gr->gr_mem) { 494 if (!strcmp(*gr->gr_mem, name)) { 495 endgrent(); 496 return(1); 497 } 498 gr->gr_mem++; 499 } 500 501 endgrent(); 502 return(0); 503 } 504 505 /* 506 * Check a user against the +@netgroup/-@netgroup lines listed in 507 * the local password database. Also checks +user/-user lines. 508 * If no netgroup exists that matches +@netgroup/-@netgroup, 509 * try searching regular groups with the same name. 510 */ 511 static inline int 512 verf(name) 513 const char *name; 514 { 515 DBT key; 516 char bf[sizeof(_pw_keynum) + 1]; 517 int keynum = 0; 518 519 again: 520 ++keynum; 521 bf[0] = _PW_KEYYPBYNUM; 522 bcopy((char *)&keynum, bf + 1, sizeof(keynum)); 523 key.data = (u_char *)bf; 524 key.size = sizeof(keynum) + 1; 525 if (!__hashpw(&key)) { 526 /* Try again using old format */ 527 bf[0] = _PW_KEYBYNUM; 528 bcopy((char *)&keynum, bf + 1, sizeof(keynum)); 529 key.data = (u_char *)bf; 530 if (!__hashpw(&key)) 531 return(0); 532 } 533 if (_pw_passwd.pw_name[0] != '+' && (_pw_passwd.pw_name[0] != '-')) 534 goto again; 535 if (_pw_passwd.pw_name[0] == '+') { 536 if (strlen(_pw_passwd.pw_name) == 1) /* Wildcard */ 537 return(1); 538 if (_pw_passwd.pw_name[1] == '@') { 539 if ((innetgr(_pw_passwd.pw_name+2, NULL, name, 540 _pw_yp_domain) || 541 ingr(_pw_passwd.pw_name+2, name)) && !lookup(name)) 542 return(1); 543 else 544 goto again; 545 } else { 546 if (!strcmp(name, _pw_passwd.pw_name+1) && 547 !lookup(name)) 548 return(1); 549 else 550 goto again; 551 } 552 } 553 if (_pw_passwd.pw_name[0] == '-') { 554 /* Note that a minus wildcard is a no-op. */ 555 if (_pw_passwd.pw_name[1] == '@') { 556 if (innetgr(_pw_passwd.pw_name+2, NULL, name, 557 _pw_yp_domain) || 558 ingr(_pw_passwd.pw_name+2, name)) { 559 store(name); 560 return(0); 561 } else 562 goto again; 563 } else { 564 if (!strcmp(name, _pw_passwd.pw_name+1)) { 565 store(name); 566 return(0); 567 } else 568 goto again; 569 } 570 571 } 572 return(0); 573 } 574 575 static char * 576 _get_adjunct_pw(name) 577 const char *name; 578 { 579 static char adjunctbuf[YPMAXRECORD+2]; 580 int rval; 581 char *result; 582 int resultlen; 583 char *map = "passwd.adjunct.byname"; 584 char *s; 585 586 if ((rval = yp_match(_pw_yp_domain, map, name, strlen(name), 587 &result, &resultlen))) 588 return(NULL); 589 590 strncpy(adjunctbuf, result, resultlen); 591 adjunctbuf[resultlen] = '\0'; 592 free(result); 593 result = (char *)&adjunctbuf; 594 595 /* Don't care about the name. */ 596 if ((s = strsep(&result, ":")) == NULL) 597 return (NULL); /* name */ 598 if ((s = strsep(&result, ":")) == NULL) 599 return (NULL); /* password */ 600 601 return(s); 602 } 603 604 static int 605 _pw_breakout_yp(struct passwd *pw, char *res, int resultlen, int master) 606 { 607 char *s, *result; 608 static char resbuf[YPMAXRECORD+2]; 609 610 /* 611 * Be triple, ultra super-duper paranoid: reject entries 612 * that start with a + or -. yp_mkdb and /var/yp/Makefile 613 * are _both_ supposed to strip these out, but you never 614 * know. 615 */ 616 if (*res == '+' || *res == '-') 617 return 0; 618 619 /* 620 * The NIS protocol definition limits the size of an NIS 621 * record to YPMAXRECORD bytes. We need to do a copy to 622 * a static buffer here since the memory pointed to by 623 * res will be free()ed when this function returns. 624 */ 625 strncpy((char *)&resbuf, res, resultlen); 626 resbuf[resultlen] = '\0'; 627 result = (char *)&resbuf; 628 629 /* 630 * XXX Sanity check: make sure all fields are valid (no NULLs). 631 * If we find a badly formatted entry, we punt. 632 */ 633 if ((s = strsep(&result, ":")) == NULL) return 0; /* name */ 634 /* 635 * We don't care what pw_fields says: we _always_ want the 636 * username returned to us by NIS. 637 */ 638 pw->pw_name = s; 639 pw->pw_fields |= _PWF_NAME; 640 641 if ((s = strsep(&result, ":")) == NULL) return 0; /* password */ 642 if(!(pw->pw_fields & _PWF_PASSWD)) { 643 /* SunOS passwd.adjunct hack */ 644 if (master == YP_HAVE_ADJUNCT && strstr(s, "##") != NULL) { 645 char *realpw; 646 realpw = _get_adjunct_pw(pw->pw_name); 647 if (realpw == NULL) 648 pw->pw_passwd = s; 649 else 650 pw->pw_passwd = realpw; 651 } else { 652 pw->pw_passwd = s; 653 } 654 pw->pw_fields |= _PWF_PASSWD; 655 } 656 657 if ((s = strsep(&result, ":")) == NULL) return 0; /* uid */ 658 if(!(pw->pw_fields & _PWF_UID)) { 659 pw->pw_uid = atoi(s); 660 pw->pw_fields |= _PWF_UID; 661 } 662 663 if ((s = strsep(&result, ":")) == NULL) return 0; /* gid */ 664 if(!(pw->pw_fields & _PWF_GID)) { 665 pw->pw_gid = atoi(s); 666 pw->pw_fields |= _PWF_GID; 667 } 668 669 if (master == YP_HAVE_MASTER) { 670 if ((s = strsep(&result, ":")) == NULL) return 0; /* class */ 671 if(!(pw->pw_fields & _PWF_CLASS)) { 672 pw->pw_class = s; 673 pw->pw_fields |= _PWF_CLASS; 674 } 675 676 if ((s = strsep(&result, ":")) == NULL) return 0; /* change */ 677 if(!(pw->pw_fields & _PWF_CHANGE)) { 678 pw->pw_change = atol(s); 679 pw->pw_fields |= _PWF_CHANGE; 680 } 681 682 if ((s = strsep(&result, ":")) == NULL) return 0; /* expire */ 683 if(!(pw->pw_fields & _PWF_EXPIRE)) { 684 pw->pw_expire = atol(s); 685 pw->pw_fields |= _PWF_EXPIRE; 686 } 687 } 688 689 if ((s = strsep(&result, ":")) == NULL) return 0; /* gecos */ 690 if(!(pw->pw_fields & _PWF_GECOS)) { 691 pw->pw_gecos = s; 692 pw->pw_fields |= _PWF_GECOS; 693 } 694 695 if ((s = strsep(&result, ":")) == NULL) return 0; /* dir */ 696 if(!(pw->pw_fields & _PWF_DIR)) { 697 pw->pw_dir = s; 698 pw->pw_fields |= _PWF_DIR; 699 } 700 701 if ((s = strsep(&result, ":")) == NULL) return 0; /* shell */ 702 if(!(pw->pw_fields & _PWF_SHELL)) { 703 pw->pw_shell = s; 704 pw->pw_fields |= _PWF_SHELL; 705 } 706 707 /* Be consistent. */ 708 if ((s = strchr(pw->pw_shell, '\n'))) *s = '\0'; 709 710 return 1; 711 } 712 713 static int 714 _havemaster(char *_yp_domain) 715 { 716 int order; 717 int rval; 718 719 if (!(rval = yp_order(_yp_domain, "master.passwd.byname", &order))) 720 return(YP_HAVE_MASTER); 721 722 /* 723 * NIS+ in YP compat mode doesn't support 724 * YPPROC_ORDER -- no point in continuing. 725 */ 726 if (rval == YPERR_YPERR) 727 return(YP_HAVE_NONE); 728 729 /* master.passwd doesn't exist -- try passwd.adjunct */ 730 if (rval == YPERR_MAP) { 731 rval = yp_order(_yp_domain, "passwd.adjunct.byname", &order); 732 if (!rval) 733 return(YP_HAVE_ADJUNCT); 734 } 735 736 return (YP_HAVE_NONE); 737 } 738 739 static int 740 _getyppass(struct passwd *pw, const char *name, const char *map) 741 { 742 char *result, *s; 743 int resultlen; 744 int rv; 745 char mastermap[YPMAXRECORD]; 746 747 if(!_pw_yp_domain) { 748 if(yp_get_default_domain(&_pw_yp_domain)) 749 return 0; 750 } 751 752 if (_gotmaster == YP_HAVE_MASTER) 753 sprintf(mastermap,"master.%s", map); 754 else 755 sprintf(mastermap,"%s",map); 756 757 if(yp_match(_pw_yp_domain, (char *)&mastermap, name, strlen(name), 758 &result, &resultlen)) { 759 if (_gotmaster != YP_HAVE_MASTER) 760 return 0; 761 sprintf(mastermap,"%s",map); 762 if (yp_match(_pw_yp_domain, (char *)&mastermap, 763 name, strlen(name), &result, &resultlen)) 764 return 0; 765 _gotmaster = YP_HAVE_NONE; 766 } 767 768 if (!_pw_stepping_yp) { 769 s = strchr(result, ':'); 770 if (s) { 771 *s = '\0'; 772 } else { 773 /* Must be a malformed entry if no colons. */ 774 free(result); 775 return(0); 776 } 777 778 if (!verf(result)) { 779 *s = ':'; 780 free(result); 781 return(0); 782 } 783 784 *s = ':'; /* Put back the colon we previously replaced with a NUL. */ 785 } 786 787 rv = _pw_breakout_yp(pw, result, resultlen, _gotmaster); 788 free(result); 789 return(rv); 790 } 791 792 static int 793 _nextyppass(struct passwd *pw) 794 { 795 static char *key; 796 static int keylen; 797 char *lastkey, *result, *s; 798 int resultlen; 799 int rv; 800 char *map = "passwd.byname"; 801 802 if(!_pw_yp_domain) { 803 if(yp_get_default_domain(&_pw_yp_domain)) 804 return 0; 805 } 806 807 if (_gotmaster == YP_HAVE_MASTER) 808 map = "master.passwd.byname"; 809 810 if(!_pw_stepping_yp) { 811 if(key) free(key); 812 rv = yp_first(_pw_yp_domain, map, 813 &key, &keylen, &result, &resultlen); 814 if(rv) { 815 return 0; 816 } 817 _pw_stepping_yp = 1; 818 goto unpack; 819 } else { 820 tryagain: 821 lastkey = key; 822 rv = yp_next(_pw_yp_domain, map, key, keylen, 823 &key, &keylen, &result, &resultlen); 824 free(lastkey); 825 unpack: 826 if(rv) { 827 _pw_stepping_yp = 0; 828 return 0; 829 } 830 831 s = strchr(result, ':'); 832 if (s) { 833 *s = '\0'; 834 } else { 835 /* Must be a malformed entry if no colons. */ 836 free(result); 837 goto tryagain; 838 } 839 840 if (lookup(result)) { 841 *s = ':'; 842 free(result); 843 goto tryagain; 844 } 845 846 *s = ':'; /* Put back the colon we previously replaced with a NUL. */ 847 if (_pw_breakout_yp(pw, result, resultlen, _gotmaster)) { 848 free(result); 849 return(1); 850 } else { 851 free(result); 852 goto tryagain; 853 } 854 } 855 } 856 857 #endif /* YP */ 858