getpwent.c revision 1.18
1 /* $NetBSD: getpwent.c,v 1.18 1997/05/21 01:51:40 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * Portions Copyright (c) 1994, 1995, Jason Downs. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)getpwent.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 static char rcsid[] = "$NetBSD: getpwent.c,v 1.18 1997/05/21 01:51:40 lukem Exp $"; 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include <sys/param.h> 46 #include <fcntl.h> 47 #include <db.h> 48 #include <syslog.h> 49 #include <pwd.h> 50 #include <utmp.h> 51 #include <errno.h> 52 #include <unistd.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <limits.h> 56 #include <netgroup.h> 57 #ifdef YP 58 #include <machine/param.h> 59 #include <stdio.h> 60 #include <rpc/rpc.h> 61 #include <rpcsvc/yp_prot.h> 62 #include <rpcsvc/ypclnt.h> 63 #endif 64 65 static struct passwd _pw_passwd; /* password structure */ 66 static DB *_pw_db; /* password database */ 67 static int _pw_keynum; /* key counter */ 68 static int _pw_stayopen; /* keep fd's open */ 69 static int _pw_flags; /* password flags */ 70 static int __hashpw __P((DBT *)); 71 static int __initdb __P((void)); 72 73 const char __yp_token[] = "__YP!"; /* Let pwd_mkdb pull this in. */ 74 75 #ifdef YP 76 enum _ypmode { YPMODE_NONE, YPMODE_FULL, YPMODE_USER, YPMODE_NETGRP }; 77 static enum _ypmode __ypmode; 78 79 static char *__ypcurrent, *__ypdomain; 80 static int __ypcurrentlen; 81 static struct passwd *__ypproto = (struct passwd *)NULL; 82 static int __ypflags; 83 static char line[1024]; 84 static long prbuf[1024 / sizeof(long)]; 85 static DB *__ypexclude = (DB *)NULL; 86 87 static int __has_yppw __P((void)); 88 static int __ypexclude_add __P((const char *)); 89 static int __ypexclude_is __P((const char *)); 90 static void __ypproto_set __P((void)); 91 92 static int 93 __ypexclude_add(name) 94 const char *name; 95 { 96 DBT key, data; 97 98 /* initialize the exclusion table if needed. */ 99 if(__ypexclude == (DB *)NULL) { 100 __ypexclude = dbopen(NULL, O_RDWR, 600, DB_HASH, NULL); 101 if(__ypexclude == (DB *)NULL) 102 return(1); 103 } 104 105 /* set up the key */ 106 key.data = (char *)name; 107 key.size = strlen(name); 108 109 /* data is nothing. */ 110 data.data = NULL; 111 data.size = 0; 112 113 /* store it */ 114 if((__ypexclude->put)(__ypexclude, &key, &data, 0) == -1) 115 return(1); 116 117 return(0); 118 } 119 120 static int 121 __ypexclude_is(name) 122 const char *name; 123 { 124 DBT key, data; 125 126 if(__ypexclude == (DB *)NULL) 127 return(0); /* nothing excluded */ 128 129 /* set up the key */ 130 key.data = (char *)name; 131 key.size = strlen(name); 132 133 if((__ypexclude->get)(__ypexclude, &key, &data, 0) == 0) 134 return(1); /* excluded */ 135 136 return(0); 137 } 138 139 static void 140 __ypproto_set() 141 { 142 char *ptr; 143 struct passwd *pw = &_pw_passwd; 144 145 /* make this the new prototype */ 146 ptr = (char *)prbuf; 147 148 /* first allocate the struct. */ 149 __ypproto = (struct passwd *)ptr; 150 ptr += sizeof(struct passwd); 151 152 /* name */ 153 if(pw->pw_name && (pw->pw_name)[0]) { 154 ptr = (char *)ALIGN(ptr); 155 bcopy(pw->pw_name, ptr, strlen(pw->pw_name) + 1); 156 __ypproto->pw_name = ptr; 157 ptr += (strlen(pw->pw_name) + 1); 158 } else 159 __ypproto->pw_name = (char *)NULL; 160 161 /* password */ 162 if(pw->pw_passwd && (pw->pw_passwd)[0]) { 163 ptr = (char *)ALIGN(ptr); 164 bcopy(pw->pw_passwd, ptr, strlen(pw->pw_passwd) + 1); 165 __ypproto->pw_passwd = ptr; 166 ptr += (strlen(pw->pw_passwd) + 1); 167 } else 168 __ypproto->pw_passwd = (char *)NULL; 169 170 /* uid */ 171 __ypproto->pw_uid = pw->pw_uid; 172 173 /* gid */ 174 __ypproto->pw_gid = pw->pw_gid; 175 176 /* change (ignored anyway) */ 177 __ypproto->pw_change = pw->pw_change; 178 179 /* class (ignored anyway) */ 180 __ypproto->pw_class = ""; 181 182 /* gecos */ 183 if(pw->pw_gecos && (pw->pw_gecos)[0]) { 184 ptr = (char *)ALIGN(ptr); 185 bcopy(pw->pw_gecos, ptr, strlen(pw->pw_gecos) + 1); 186 __ypproto->pw_gecos = ptr; 187 ptr += (strlen(pw->pw_gecos) + 1); 188 } else 189 __ypproto->pw_gecos = (char *)NULL; 190 191 /* dir */ 192 if(pw->pw_dir && (pw->pw_dir)[0]) { 193 ptr = (char *)ALIGN(ptr); 194 bcopy(pw->pw_dir, ptr, strlen(pw->pw_dir) + 1); 195 __ypproto->pw_dir = ptr; 196 ptr += (strlen(pw->pw_dir) + 1); 197 } else 198 __ypproto->pw_dir = (char *)NULL; 199 200 /* shell */ 201 if(pw->pw_shell && (pw->pw_shell)[0]) { 202 ptr = (char *)ALIGN(ptr); 203 bcopy(pw->pw_shell, ptr, strlen(pw->pw_shell) + 1); 204 __ypproto->pw_shell = ptr; 205 ptr += (strlen(pw->pw_shell) + 1); 206 } else 207 __ypproto->pw_shell = (char *)NULL; 208 209 /* expire (ignored anyway) */ 210 __ypproto->pw_expire = pw->pw_expire; 211 212 /* flags */ 213 __ypflags = _pw_flags; 214 } 215 216 static int 217 __ypparse(pw, s) 218 struct passwd *pw; 219 char *s; 220 { 221 char *bp, *cp; 222 223 /* since this is currently using strsep(), parse it first */ 224 bp = s; 225 pw->pw_name = strsep(&bp, ":\n"); 226 pw->pw_passwd = strsep(&bp, ":\n"); 227 if (!(cp = strsep(&bp, ":\n"))) 228 return 1; 229 pw->pw_uid = atoi(cp); 230 if (!(cp = strsep(&bp, ":\n"))) 231 return 1; 232 pw->pw_gid = atoi(cp); 233 pw->pw_change = 0; 234 pw->pw_class = ""; 235 pw->pw_gecos = strsep(&bp, ":\n"); 236 pw->pw_dir = strsep(&bp, ":\n"); 237 pw->pw_shell = strsep(&bp, ":\n"); 238 pw->pw_expire = 0; 239 240 /* now let the prototype override, if set. */ 241 if(__ypproto != (struct passwd *)NULL) { 242 #ifdef YP_OVERRIDE_PASSWD 243 if(__ypproto->pw_passwd != (char *)NULL) 244 pw->pw_passwd = __ypproto->pw_passwd; 245 #endif 246 if(!(__ypflags & _PASSWORD_NOUID)) 247 pw->pw_uid = __ypproto->pw_uid; 248 if(!(__ypflags & _PASSWORD_NOGID)) 249 pw->pw_gid = __ypproto->pw_gid; 250 if(__ypproto->pw_gecos != (char *)NULL) 251 pw->pw_gecos = __ypproto->pw_gecos; 252 if(__ypproto->pw_dir != (char *)NULL) 253 pw->pw_dir = __ypproto->pw_dir; 254 if(__ypproto->pw_shell != (char *)NULL) 255 pw->pw_shell = __ypproto->pw_shell; 256 } 257 return 0; 258 } 259 #endif 260 261 struct passwd * 262 getpwent() 263 { 264 DBT key; 265 char bf[sizeof(_pw_keynum) + 1]; 266 #ifdef YP 267 char *cp; 268 static char *name = (char *)NULL; 269 const char *user, *host, *dom; 270 int has_yppw; 271 #endif 272 273 if (!_pw_db && !__initdb()) 274 return((struct passwd *)NULL); 275 276 #ifdef YP 277 has_yppw = __has_yppw(); 278 279 again: 280 if(has_yppw && (__ypmode != YPMODE_NONE)) { 281 char *key, *data; 282 int keylen, datalen; 283 int r, s; 284 285 if(!__ypdomain) { 286 if( _yp_check(&__ypdomain) == 0) { 287 __ypmode = YPMODE_NONE; 288 goto again; 289 } 290 } 291 switch(__ypmode) { 292 case YPMODE_FULL: 293 data = NULL; 294 if(__ypcurrent) { 295 key = NULL; 296 r = yp_next(__ypdomain, "passwd.byname", 297 __ypcurrent, __ypcurrentlen, 298 &key, &keylen, &data, &datalen); 299 free(__ypcurrent); 300 if(r != 0) { 301 __ypcurrent = NULL; 302 if (key) 303 free(key); 304 } 305 else { 306 __ypcurrent = key; 307 __ypcurrentlen = keylen; 308 } 309 } else { 310 r = yp_first(__ypdomain, "passwd.byname", 311 &__ypcurrent, &__ypcurrentlen, 312 &data, &datalen); 313 } 314 if(r != 0) { 315 __ypmode = YPMODE_NONE; 316 if(data) 317 free(data); 318 data = NULL; 319 goto again; 320 } 321 bcopy(data, line, datalen); 322 free(data); 323 data = NULL; 324 break; 325 case YPMODE_NETGRP: 326 s = getnetgrent(&host, &user, &dom); 327 if(s == 0) { /* end of group */ 328 endnetgrent(); 329 __ypmode = YPMODE_NONE; 330 goto again; 331 } 332 if(user && *user) { 333 data = NULL; 334 r = yp_match(__ypdomain, "passwd.byname", 335 user, strlen(user), 336 &data, &datalen); 337 } else 338 goto again; 339 if(r != 0) { 340 /* 341 * if the netgroup is invalid, keep looking 342 * as there may be valid users later on. 343 */ 344 if(data) 345 free(data); 346 goto again; 347 } 348 bcopy(data, line, datalen); 349 free(data); 350 data = NULL; 351 break; 352 case YPMODE_USER: 353 if(name != (char *)NULL) { 354 data = NULL; 355 r = yp_match(__ypdomain, "passwd.byname", 356 name, strlen(name), 357 &data, &datalen); 358 __ypmode = YPMODE_NONE; 359 free(name); 360 name = NULL; 361 if(r != 0) { 362 if(data) 363 free(data); 364 goto again; 365 } 366 bcopy(data, line, datalen); 367 free(data); 368 data = (char *)NULL; 369 } else { /* XXX */ 370 __ypmode = YPMODE_NONE; 371 goto again; 372 } 373 break; 374 } 375 376 line[datalen] = '\0'; 377 if (__ypparse(&_pw_passwd, line)) 378 goto again; 379 return &_pw_passwd; 380 } 381 #endif 382 383 ++_pw_keynum; 384 bf[0] = _PW_KEYBYNUM; 385 bcopy((char *)&_pw_keynum, bf + 1, sizeof(_pw_keynum)); 386 key.data = (u_char *)bf; 387 key.size = sizeof(_pw_keynum) + 1; 388 if(__hashpw(&key)) { 389 #ifdef YP 390 /* if we don't have YP at all, don't bother. */ 391 if(has_yppw) { 392 if(_pw_passwd.pw_name[0] == '+') { 393 /* set the mode */ 394 switch(_pw_passwd.pw_name[1]) { 395 case '\0': 396 __ypmode = YPMODE_FULL; 397 break; 398 case '@': 399 __ypmode = YPMODE_NETGRP; 400 setnetgrent(_pw_passwd.pw_name + 2); 401 break; 402 default: 403 __ypmode = YPMODE_USER; 404 name = strdup(_pw_passwd.pw_name + 1); 405 break; 406 } 407 408 /* save the prototype */ 409 __ypproto_set(); 410 goto again; 411 } else if(_pw_passwd.pw_name[0] == '-') { 412 /* an attempted exclusion */ 413 switch(_pw_passwd.pw_name[1]) { 414 case '\0': 415 break; 416 case '@': 417 setnetgrent(_pw_passwd.pw_name + 2); 418 while(getnetgrent(&host, &user, &dom)) { 419 if(user && *user) 420 __ypexclude_add(user); 421 } 422 endnetgrent(); 423 break; 424 default: 425 __ypexclude_add(_pw_passwd.pw_name + 1); 426 break; 427 } 428 goto again; 429 } 430 } 431 #endif 432 return &_pw_passwd; 433 } 434 return (struct passwd *)NULL; 435 } 436 437 #ifdef YP 438 439 /* 440 * See if the YP token is in the database. Only works if pwd_mkdb knows 441 * about the token. 442 */ 443 static int 444 __has_yppw() 445 { 446 DBT key, data; 447 DBT pkey, pdata; 448 int len; 449 char bf[MAXLOGNAME]; 450 451 key.data = (u_char *)__yp_token; 452 key.size = strlen(__yp_token); 453 454 /* Pre-token database support. */ 455 bf[0] = _PW_KEYBYNAME; 456 bf[1] = '+'; 457 pkey.data = (u_char *)bf; 458 pkey.size = 2; 459 460 if ((_pw_db->get)(_pw_db, &key, &data, 0) 461 && (_pw_db->get)(_pw_db, &pkey, &pdata, 0)) 462 return(0); /* No YP. */ 463 return(1); 464 } 465 #endif 466 467 struct passwd * 468 getpwnam(name) 469 const char *name; 470 { 471 DBT key; 472 int len, rval; 473 char bf[MAXLOGNAME + 1]; 474 475 if (!_pw_db && !__initdb()) 476 return((struct passwd *)NULL); 477 478 #ifdef YP 479 /* 480 * If YP is active, we must sequence through the passwd file 481 * in sequence. 482 */ 483 if (__has_yppw()) { 484 int r; 485 int s = -1; 486 const char *host, *user, *dom; 487 488 for(_pw_keynum=1; _pw_keynum; _pw_keynum++) { 489 bf[0] = _PW_KEYBYNUM; 490 bcopy((char *)&_pw_keynum, bf + 1, sizeof(_pw_keynum)); 491 key.data = (u_char *)bf; 492 key.size = sizeof(_pw_keynum) + 1; 493 if(__hashpw(&key) == 0) 494 break; 495 switch(_pw_passwd.pw_name[0]) { 496 case '+': 497 if(!__ypdomain) { 498 if(_yp_check(&__ypdomain) == 0) { 499 continue; 500 } 501 } 502 /* save the prototype */ 503 __ypproto_set(); 504 505 switch(_pw_passwd.pw_name[1]) { 506 case '\0': 507 if(__ypcurrent) { 508 free(__ypcurrent); 509 __ypcurrent = NULL; 510 } 511 r = yp_match(__ypdomain, 512 "passwd.byname", 513 name, strlen(name), 514 &__ypcurrent, &__ypcurrentlen); 515 if(r != 0) { 516 if(__ypcurrent) 517 free(__ypcurrent); 518 __ypcurrent = NULL; 519 continue; 520 } 521 break; 522 case '@': 523 pwnam_netgrp: 524 if(__ypcurrent) { 525 free(__ypcurrent); 526 __ypcurrent = NULL; 527 } 528 if(s == -1) /* first time */ 529 setnetgrent(_pw_passwd.pw_name + 2); 530 s = getnetgrent(&host, &user, &dom); 531 if(s == 0) { /* end of group */ 532 endnetgrent(); 533 s = -1; 534 continue; 535 } else { 536 if(user && *user) { 537 r = yp_match(__ypdomain, 538 "passwd.byname", 539 user, strlen(user), 540 &__ypcurrent, 541 &__ypcurrentlen); 542 } else 543 goto pwnam_netgrp; 544 if(r != 0) { 545 if(__ypcurrent) 546 free(__ypcurrent); 547 __ypcurrent = NULL; 548 /* 549 * just because this 550 * user is bad, doesn't 551 * mean they all are. 552 */ 553 goto pwnam_netgrp; 554 } 555 } 556 break; 557 default: 558 if(__ypcurrent) { 559 free(__ypcurrent); 560 __ypcurrent = NULL; 561 } 562 user = _pw_passwd.pw_name + 1; 563 r = yp_match(__ypdomain, 564 "passwd.byname", 565 user, strlen(user), 566 &__ypcurrent, 567 &__ypcurrentlen); 568 if(r != 0) { 569 if(__ypcurrent) 570 free(__ypcurrent); 571 __ypcurrent = NULL; 572 continue; 573 } 574 break; 575 } 576 bcopy(__ypcurrent, line, __ypcurrentlen); 577 line[__ypcurrentlen] = '\0'; 578 if(__ypparse(&_pw_passwd, line) 579 || __ypexclude_is(_pw_passwd.pw_name)) { 580 if(s == 1) /* inside netgrp */ 581 goto pwnam_netgrp; 582 continue; 583 } 584 break; 585 case '-': 586 /* attempted exclusion */ 587 switch(_pw_passwd.pw_name[1]) { 588 case '\0': 589 break; 590 case '@': 591 setnetgrent(_pw_passwd.pw_name + 2); 592 while(getnetgrent(&host, &user, &dom)) { 593 if(user && *user) 594 __ypexclude_add(user); 595 } 596 endnetgrent(); 597 break; 598 default: 599 __ypexclude_add(_pw_passwd.pw_name + 1); 600 break; 601 } 602 break; 603 604 continue; 605 } 606 if(strcmp(_pw_passwd.pw_name, name) == 0) { 607 if (!_pw_stayopen) { 608 (void)(_pw_db->close)(_pw_db); 609 _pw_db = (DB *)NULL; 610 } 611 if(__ypexclude != (DB *)NULL) { 612 (void)(__ypexclude->close)(__ypexclude); 613 __ypexclude = (DB *)NULL; 614 } 615 __ypproto = (struct passwd *)NULL; 616 return &_pw_passwd; 617 } 618 if(s == 1) /* inside netgrp */ 619 goto pwnam_netgrp; 620 continue; 621 } 622 if (!_pw_stayopen) { 623 (void)(_pw_db->close)(_pw_db); 624 _pw_db = (DB *)NULL; 625 } 626 if(__ypexclude != (DB *)NULL) { 627 (void)(__ypexclude->close)(__ypexclude); 628 __ypexclude = (DB *)NULL; 629 } 630 __ypproto = (struct passwd *)NULL; 631 return (struct passwd *)NULL; 632 } 633 #endif /* YP */ 634 635 bf[0] = _PW_KEYBYNAME; 636 len = strlen(name); 637 len = MIN(len, MAXLOGNAME); 638 bcopy(name, bf + 1, len); 639 key.data = (u_char *)bf; 640 key.size = len + 1; 641 rval = __hashpw(&key); 642 643 if (!_pw_stayopen) { 644 (void)(_pw_db->close)(_pw_db); 645 _pw_db = (DB *)NULL; 646 } 647 return(rval ? &_pw_passwd : (struct passwd *)NULL); 648 } 649 650 struct passwd * 651 #ifdef __STDC__ 652 getpwuid(uid_t uid) 653 #else 654 getpwuid(uid) 655 int uid; 656 #endif 657 { 658 DBT key; 659 char bf[sizeof(_pw_keynum) + 1]; 660 int keyuid, rval; 661 662 if (!_pw_db && !__initdb()) 663 return((struct passwd *)NULL); 664 665 #ifdef YP 666 /* 667 * If YP is active, we must sequence through the passwd file 668 * in sequence. 669 */ 670 if (__has_yppw()) { 671 char uidbuf[20]; 672 int r; 673 int s = -1; 674 const char *host, *user, *dom; 675 676 snprintf(uidbuf, sizeof uidbuf, "%d", uid); 677 for(_pw_keynum=1; _pw_keynum; _pw_keynum++) { 678 bf[0] = _PW_KEYBYNUM; 679 bcopy((char *)&_pw_keynum, bf + 1, sizeof(_pw_keynum)); 680 key.data = (u_char *)bf; 681 key.size = sizeof(_pw_keynum) + 1; 682 if(__hashpw(&key) == 0) 683 break; 684 switch(_pw_passwd.pw_name[0]) { 685 case '+': 686 if(!__ypdomain) { 687 if(_yp_check(&__ypdomain) == 0) { 688 continue; 689 } 690 } 691 /* save the prototype */ 692 __ypproto_set(); 693 694 switch(_pw_passwd.pw_name[1]) { 695 case '\0': 696 if(__ypcurrent) { 697 free(__ypcurrent); 698 __ypcurrent = NULL; 699 } 700 r = yp_match(__ypdomain, "passwd.byuid", 701 uidbuf, strlen(uidbuf), 702 &__ypcurrent, &__ypcurrentlen); 703 if(r != 0) { 704 if(__ypcurrent) 705 free(__ypcurrent); 706 __ypcurrent = NULL; 707 continue; 708 } 709 break; 710 case '@': 711 pwuid_netgrp: 712 if(__ypcurrent) { 713 free(__ypcurrent); 714 __ypcurrent = NULL; 715 } 716 if(s == -1) /* first time */ 717 setnetgrent(_pw_passwd.pw_name + 2); 718 s = getnetgrent(&host, &user, &dom); 719 if(s == 0) { /* end of group */ 720 endnetgrent(); 721 s = -1; 722 continue; 723 } else { 724 if(user && *user) { 725 r = yp_match(__ypdomain, 726 "passwd.byname", 727 user, strlen(user), 728 &__ypcurrent, 729 &__ypcurrentlen); 730 } else 731 goto pwuid_netgrp; 732 if(r != 0) { 733 if(__ypcurrent) 734 free(__ypcurrent); 735 __ypcurrent = NULL; 736 /* 737 * just because this 738 * user is bad, doesn't 739 * mean they all are. 740 */ 741 goto pwuid_netgrp; 742 } 743 } 744 break; 745 default: 746 if(__ypcurrent) { 747 free(__ypcurrent); 748 __ypcurrent = NULL; 749 } 750 user = _pw_passwd.pw_name + 1; 751 r = yp_match(__ypdomain, 752 "passwd.byname", 753 user, strlen(user), 754 &__ypcurrent, 755 &__ypcurrentlen); 756 if(r != 0) { 757 if(__ypcurrent) 758 free(__ypcurrent); 759 __ypcurrent = NULL; 760 continue; 761 } 762 break; 763 } 764 bcopy(__ypcurrent, line, __ypcurrentlen); 765 line[__ypcurrentlen] = '\0'; 766 if(__ypparse(&_pw_passwd, line) 767 || __ypexclude_is(_pw_passwd.pw_name)) { 768 if(s == 1) /* inside netgroup */ 769 goto pwuid_netgrp; 770 continue; 771 } 772 break; 773 case '-': 774 /* attempted exclusion */ 775 switch(_pw_passwd.pw_name[1]) { 776 case '\0': 777 break; 778 case '@': 779 setnetgrent(_pw_passwd.pw_name + 2); 780 while(getnetgrent(&host, &user, &dom)) { 781 if(user && *user) 782 __ypexclude_add(user); 783 } 784 endnetgrent(); 785 break; 786 default: 787 __ypexclude_add(_pw_passwd.pw_name + 1); 788 break; 789 } 790 break; 791 792 continue; 793 } 794 if( _pw_passwd.pw_uid == uid) { 795 if (!_pw_stayopen) { 796 (void)(_pw_db->close)(_pw_db); 797 _pw_db = (DB *)NULL; 798 } 799 if (__ypexclude != (DB *)NULL) { 800 (void)(__ypexclude->close)(__ypexclude); 801 __ypexclude = (DB *)NULL; 802 } 803 __ypproto = NULL; 804 return &_pw_passwd; 805 } 806 if(s == 1) /* inside netgroup */ 807 goto pwuid_netgrp; 808 continue; 809 } 810 if (!_pw_stayopen) { 811 (void)(_pw_db->close)(_pw_db); 812 _pw_db = (DB *)NULL; 813 } 814 if(__ypexclude != (DB *)NULL) { 815 (void)(__ypexclude->close)(__ypexclude); 816 __ypexclude = (DB *)NULL; 817 } 818 __ypproto = (struct passwd *)NULL; 819 return (struct passwd *)NULL; 820 } 821 #endif /* YP */ 822 823 bf[0] = _PW_KEYBYUID; 824 keyuid = uid; 825 bcopy(&keyuid, bf + 1, sizeof(keyuid)); 826 key.data = (u_char *)bf; 827 key.size = sizeof(keyuid) + 1; 828 rval = __hashpw(&key); 829 830 if (!_pw_stayopen) { 831 (void)(_pw_db->close)(_pw_db); 832 _pw_db = (DB *)NULL; 833 } 834 return(rval ? &_pw_passwd : (struct passwd *)NULL); 835 } 836 837 int 838 setpassent(stayopen) 839 int stayopen; 840 { 841 _pw_keynum = 0; 842 _pw_stayopen = stayopen; 843 #ifdef YP 844 __ypmode = YPMODE_NONE; 845 if(__ypcurrent) 846 free(__ypcurrent); 847 __ypcurrent = NULL; 848 if(__ypexclude != (DB *)NULL) { 849 (void)(__ypexclude->close)(__ypexclude); 850 __ypexclude = (DB *)NULL; 851 } 852 __ypproto = (struct passwd *)NULL; 853 #endif 854 return(1); 855 } 856 857 void 858 setpwent() 859 { 860 (void) setpassent(0); 861 } 862 863 void 864 endpwent() 865 { 866 _pw_keynum = 0; 867 if (_pw_db) { 868 (void)(_pw_db->close)(_pw_db); 869 _pw_db = (DB *)NULL; 870 } 871 #ifdef YP 872 __ypmode = YPMODE_NONE; 873 if(__ypcurrent) 874 free(__ypcurrent); 875 __ypcurrent = NULL; 876 if(__ypexclude != (DB *)NULL) { 877 (void)(__ypexclude->close)(__ypexclude); 878 __ypexclude = (DB *)NULL; 879 } 880 __ypproto = (struct passwd *)NULL; 881 #endif 882 } 883 884 static int 885 __initdb() 886 { 887 static int warned; 888 char *p; 889 890 #ifdef YP 891 __ypmode = YPMODE_NONE; 892 #endif 893 p = (geteuid()) ? _PATH_MP_DB : _PATH_SMP_DB; 894 _pw_db = dbopen(p, O_RDONLY, 0, DB_HASH, NULL); 895 if (_pw_db) 896 return(1); 897 if (!warned) 898 syslog(LOG_ERR, "%s: %m", p); 899 warned = 1; 900 return(0); 901 } 902 903 static int 904 __hashpw(key) 905 DBT *key; 906 { 907 char *p, *t; 908 static u_int max; 909 static char *line; 910 DBT data; 911 912 if ((_pw_db->get)(_pw_db, key, &data, 0)) 913 return(0); 914 p = (char *)data.data; 915 if (data.size > max && !(line = realloc(line, (max += 1024)))) 916 return(0); 917 918 t = line; 919 #define EXPAND(e) e = t; while ((*t++ = *p++)); 920 EXPAND(_pw_passwd.pw_name); 921 EXPAND(_pw_passwd.pw_passwd); 922 bcopy(p, (char *)&_pw_passwd.pw_uid, sizeof(int)); 923 p += sizeof(int); 924 bcopy(p, (char *)&_pw_passwd.pw_gid, sizeof(int)); 925 p += sizeof(int); 926 bcopy(p, (char *)&_pw_passwd.pw_change, sizeof(time_t)); 927 p += sizeof(time_t); 928 EXPAND(_pw_passwd.pw_class); 929 EXPAND(_pw_passwd.pw_gecos); 930 EXPAND(_pw_passwd.pw_dir); 931 EXPAND(_pw_passwd.pw_shell); 932 bcopy(p, (char *)&_pw_passwd.pw_expire, sizeof(time_t)); 933 p += sizeof(time_t); 934 935 /* See if there's any data left. If so, read in flags. */ 936 if (data.size > (p - (char *)data.data)) { 937 bcopy(p, (char *)&_pw_flags, sizeof(int)); 938 p += sizeof(int); 939 } else 940 _pw_flags = _PASSWORD_NOUID|_PASSWORD_NOGID; /* default */ 941 942 return(1); 943 } 944
Indexes created Mon Sep 22 13:09:51 GMT 2025