1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1988 AT&T 24 * All Rights Reserved 25 * 26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 /* 32 * PATH setup and search directory functions. 33 */ 34 #include "_synonyms.h" 35 36 #include <stdio.h> 37 #include <limits.h> 38 #include <fcntl.h> 39 #include <string.h> 40 #include <sys/systeminfo.h> 41 #include <debug.h> 42 #include <conv.h> 43 #include "_rtld.h" 44 #include "msg.h" 45 46 /* 47 * Given a search rule type, return a list of directories to search according 48 * to the specified rule. 49 */ 50 static Pnode * 51 get_dir_list(unsigned char rules, Rt_map * lmp, uint_t flags) 52 { 53 Pnode * dirlist = (Pnode *)0; 54 Lm_list * lml = LIST(lmp); 55 int search; 56 57 /* 58 * Determine whether ldd -s is in effect - ignore when we're searching 59 * for audit libraries as these will be added to their own link-map. 60 */ 61 if ((lml->lm_flags & LML_FLG_TRC_SEARCH) && 62 ((FLAGS1(lmp) & FL1_RT_LDDSTUB) == 0) && 63 ((flags & FLG_RT_AUDIT) == 0)) 64 search = 1; 65 else 66 search = 0; 67 68 switch (rules) { 69 case RPLENV: 70 /* 71 * Initialize the replaceable environment variable 72 * (LD_LIBRARY_PATH) search path list. Note, we always call 73 * Dbg_libs_path() so that every library lookup diagnostic can 74 * be preceded with the appropriate search path information. 75 */ 76 if (rpl_libpath) { 77 Half mode = LA_SER_LIBPATH; 78 79 /* 80 * Note, this path may have originated from the users 81 * environment or from a configuration file. 82 */ 83 if (env_info & ENV_INF_PATHCFG) 84 mode |= LA_SER_CONFIG; 85 86 DBG_CALL(Dbg_libs_path(lml, rpl_libpath, mode, 87 config->c_name)); 88 89 /* 90 * For ldd(1) -s, indicate the search paths that'll 91 * be used. If this is a secure program then some 92 * search paths may be ignored, therefore reset the 93 * rpl_libdirs pointer each time so that the 94 * diagnostics related to these unsecure directories 95 * will be output for each image loaded. 96 */ 97 if (search) { 98 const char *fmt; 99 100 if (env_info & ENV_INF_PATHCFG) 101 fmt = MSG_INTL(MSG_LDD_PTH_LIBPATHC); 102 else 103 fmt = MSG_INTL(MSG_LDD_PTH_LIBPATH); 104 105 (void) printf(fmt, rpl_libpath, config->c_name); 106 } 107 if (rpl_libdirs && (rtld_flags & RT_FL_SECURE) && 108 (search || DBG_ENABLED)) { 109 free(rpl_libdirs); 110 rpl_libdirs = 0; 111 } 112 if (!rpl_libdirs) { 113 /* 114 * If this is a secure application we need to 115 * be selective over what directories we use. 116 */ 117 rpl_libdirs = expand_paths(lmp, rpl_libpath, 118 mode, PN_TKN_HWCAP); 119 } 120 dirlist = rpl_libdirs; 121 } 122 break; 123 case PRMENV: 124 /* 125 * Initialize the permanent (LD_LIBRARY_PATH) search path list. 126 * This can only originate from a configuration file. To be 127 * consistent with the debugging display of DEFENV (above), 128 * always call Dbg_libs_path(). 129 */ 130 if (prm_libpath) { 131 DBG_CALL(Dbg_libs_path(lml, prm_libpath, 132 (LA_SER_LIBPATH | LA_SER_CONFIG), config->c_name)); 133 134 /* 135 * For ldd(1) -s, indicate the search paths that'll 136 * be used. If this is a secure program then some 137 * search paths may be ignored, therefore reset the 138 * prm_libdirs pointer each time so that the 139 * diagnostics related to these unsecure directories 140 * will be output for each image loaded. 141 */ 142 if (search) 143 (void) printf(MSG_INTL(MSG_LDD_PTH_LIBPATHC), 144 prm_libpath, config->c_name); 145 if (prm_libdirs && (rtld_flags & RT_FL_SECURE) && 146 (search || DBG_ENABLED)) { 147 free(prm_libdirs); 148 prm_libdirs = 0; 149 } 150 if (!prm_libdirs) { 151 /* 152 * If this is a secure application we need to 153 * be selective over what directories we use. 154 */ 155 prm_libdirs = expand_paths(lmp, prm_libpath, 156 (LA_SER_LIBPATH | LA_SER_CONFIG), 157 PN_TKN_HWCAP); 158 } 159 dirlist = prm_libdirs; 160 } 161 break; 162 case RUNPATH: 163 /* 164 * Initialize the runpath search path list. To be consistent 165 * with the debugging display of DEFENV (above), always call 166 * Dbg_libs_path(). 167 */ 168 if (RPATH(lmp)) { 169 DBG_CALL(Dbg_libs_path(lml, RPATH(lmp), LA_SER_RUNPATH, 170 NAME(lmp))); 171 172 /* 173 * For ldd(1) -s, indicate the search paths that'll 174 * be used. If this is a secure program then some 175 * search paths may be ignored, therefore reset the 176 * runlist pointer each time so that the diagnostics 177 * related to these unsecure directories will be 178 * output for each image loaded. 179 */ 180 if (search) 181 (void) printf(MSG_INTL(MSG_LDD_PTH_RPATH), 182 RPATH(lmp), NAME(lmp)); 183 if (RLIST(lmp) && (rtld_flags & RT_FL_SECURE) && 184 (search || DBG_ENABLED)) { 185 free(RLIST(lmp)); 186 RLIST(lmp) = 0; 187 } 188 if (!(RLIST(lmp))) 189 /* 190 * If this is a secure application we need to 191 * be selective over what directories we use. 192 */ 193 RLIST(lmp) = expand_paths(lmp, RPATH(lmp), 194 LA_SER_RUNPATH, PN_TKN_HWCAP); 195 dirlist = RLIST(lmp); 196 } 197 break; 198 case DEFAULT: 199 if ((FLAGS1(lmp) & FL1_RT_NODEFLIB) == 0) { 200 if ((rtld_flags & RT_FL_SECURE) && 201 (flags & (FLG_RT_PRELOAD | FLG_RT_AUDIT))) 202 dirlist = LM_SECURE_DIRS(lmp); 203 else 204 dirlist = LM_DFLT_DIRS(lmp); 205 } 206 207 /* 208 * For ldd(1) -s, indicate the default paths that'll be used. 209 */ 210 if (dirlist && (search || DBG_ENABLED)) { 211 Pnode * pnp = dirlist; 212 int num = 0; 213 214 if (search) 215 (void) printf(MSG_INTL(MSG_LDD_PTH_BGNDFL)); 216 for (; pnp && pnp->p_name; pnp = pnp->p_next, num++) { 217 if (search) { 218 const char *fmt; 219 220 if (num) 221 fmt = MSG_ORIG(MSG_LDD_FMT_PATHN); 222 else 223 fmt = MSG_ORIG(MSG_LDD_FMT_PATH1); 224 (void) printf(fmt, pnp->p_name); 225 } else 226 DBG_CALL(Dbg_libs_path(lml, pnp->p_name, 227 pnp->p_orig, config->c_name)); 228 } 229 if (search) { 230 if (dirlist->p_orig & LA_SER_CONFIG) 231 (void) printf(MSG_INTL(MSG_LDD_PTH_ENDDFLC), 232 config->c_name); 233 else 234 (void) printf(MSG_INTL(MSG_LDD_PTH_ENDDFL)); 235 } 236 } 237 break; 238 default: 239 break; 240 } 241 return (dirlist); 242 } 243 244 /* 245 * Get the next dir in the search rules path. 246 */ 247 Pnode * 248 get_next_dir(Pnode ** dirlist, Rt_map * lmp, uint_t flags) 249 { 250 static unsigned char *rules = NULL; 251 252 /* 253 * Search rules consist of one or more directories names. If this is a 254 * new search, then start at the beginning of the search rules. 255 * Otherwise traverse the list of directories that make up the rule. 256 */ 257 if (!*dirlist) { 258 rules = search_rules; 259 } else { 260 if ((*dirlist = (*dirlist)->p_next) != 0) 261 return (*dirlist); 262 else 263 rules++; 264 } 265 266 while (*rules) { 267 if ((*dirlist = get_dir_list(*rules, lmp, flags)) != 0) 268 return (*dirlist); 269 else 270 rules++; 271 } 272 273 /* 274 * If we got here, no more directories to search, return NULL. 275 */ 276 return (NULL); 277 } 278 279 280 /* 281 * Process a directory (runpath) or filename (needed or filter) string looking 282 * for tokens to expand. Allocate a new buffer for the string. 283 */ 284 uint_t 285 expand(char **name, size_t *len, char **list, uint_t orig, uint_t omit, 286 Rt_map *lmp) 287 { 288 char _name[PATH_MAX]; 289 char *token = 0, *oname, *optr, *_optr, *nptr, * _list; 290 size_t olen = 0, nlen = 0, _len; 291 int isaflag = 0; 292 uint_t flags = 0; 293 Lm_list *lml = LIST(lmp); 294 295 optr = _optr = oname = *name; 296 nptr = _name; 297 298 while ((olen < *len) && (nlen < PATH_MAX)) { 299 uint_t _flags; 300 301 if ((*optr != '$') || ((olen - *len) == 1)) { 302 /* 303 * When expanding paths while a configuration file 304 * exists that contains directory information, determine 305 * whether the path contains "./". If so, we'll resolve 306 * the path later to remove these relative entries. 307 */ 308 if ((rtld_flags & RT_FL_DIRCFG) && 309 (orig & LA_SER_MASK) && (*optr == '/') && 310 (optr != oname) && (*(optr - 1) == '.')) 311 flags |= TKN_DOTSLASH; 312 313 olen++, optr++; 314 continue; 315 } 316 317 /* 318 * Copy any string we've presently passed over to the new 319 * buffer. 320 */ 321 if ((_len = (optr - _optr)) != 0) { 322 if ((nlen += _len) < PATH_MAX) { 323 (void) strncpy(nptr, _optr, _len); 324 nptr = nptr + _len; 325 } else { 326 eprintf(lml, ERR_FATAL, 327 MSG_INTL(MSG_ERR_EXPAND1), NAME(lmp), 328 oname); 329 return (0); 330 } 331 } 332 333 /* 334 * Skip the token delimiter and determine if a reserved token 335 * match is found. 336 */ 337 olen++, optr++; 338 _flags = 0; 339 token = 0; 340 341 if (strncmp(optr, MSG_ORIG(MSG_TKN_ORIGIN), 342 MSG_TKN_ORIGIN_SIZE) == 0) { 343 token = (char *)MSG_ORIG(MSG_TKN_ORIGIN); 344 345 /* 346 * $ORIGIN expansion is required. Determine this 347 * objects basename. Expansion of $ORIGIN is allowed 348 * for secure applications but must be checked by the 349 * caller to insure the expanded path matches a 350 * registered secure name. 351 */ 352 if (((omit & PN_TKN_ORIGIN) == 0) && 353 (((_len = DIRSZ(lmp)) != 0) || 354 ((_len = fullpath(lmp, 0)) != 0))) { 355 if ((nlen += _len) < PATH_MAX) { 356 (void) strncpy(nptr, 357 ORIGNAME(lmp), _len); 358 nptr = nptr +_len; 359 olen += MSG_TKN_ORIGIN_SIZE; 360 optr += MSG_TKN_ORIGIN_SIZE; 361 _flags |= PN_TKN_ORIGIN; 362 } else { 363 eprintf(lml, ERR_FATAL, 364 MSG_INTL(MSG_ERR_EXPAND1), 365 NAME(lmp), oname); 366 return (0); 367 } 368 } 369 370 } else if (strncmp(optr, MSG_ORIG(MSG_TKN_PLATFORM), 371 MSG_TKN_PLATFORM_SIZE) == 0) { 372 token = (char *)MSG_ORIG(MSG_TKN_PLATFORM); 373 374 /* 375 * $PLATFORM expansion required. This would have been 376 * established from the AT_SUN_PLATFORM aux vector, but 377 * if not attempt to get it from sysconf(). 378 */ 379 if (((omit & PN_TKN_PLATFORM) == 0) && 380 ((platform == 0) && (platform_sz == 0))) { 381 char _info[SYS_NMLN]; 382 long _size; 383 384 _size = sysinfo(SI_PLATFORM, _info, SYS_NMLN); 385 if ((_size != -1) && 386 ((platform = malloc((size_t)_size)) != 0)) { 387 (void) strcpy(platform, _info); 388 platform_sz = (size_t)_size - 1; 389 } 390 } 391 if (((omit & PN_TKN_PLATFORM) == 0) && 392 (platform != 0)) { 393 if ((nlen += platform_sz) < PATH_MAX) { 394 (void) strncpy(nptr, platform, 395 platform_sz); 396 nptr = nptr + platform_sz; 397 olen += MSG_TKN_PLATFORM_SIZE; 398 optr += MSG_TKN_PLATFORM_SIZE; 399 _flags |= PN_TKN_PLATFORM; 400 } else { 401 eprintf(lml, ERR_FATAL, 402 MSG_INTL(MSG_ERR_EXPAND1), 403 NAME(lmp), oname); 404 return (0); 405 } 406 } 407 408 } else if (strncmp(optr, MSG_ORIG(MSG_TKN_OSNAME), 409 MSG_TKN_OSNAME_SIZE) == 0) { 410 token = (char *)MSG_ORIG(MSG_TKN_OSNAME); 411 412 /* 413 * $OSNAME expansion required. This is established 414 * from the sysname[] returned by uname(2). 415 */ 416 if (((omit & PN_TKN_OSNAME) == 0) && (uts == 0)) 417 uts = conv_uts(); 418 419 if (((omit & PN_TKN_OSNAME) == 0) && 420 (uts && uts->uts_osnamesz)) { 421 if ((nlen += uts->uts_osnamesz) < PATH_MAX) { 422 (void) strncpy(nptr, uts->uts_osname, 423 uts->uts_osnamesz); 424 nptr = nptr + uts->uts_osnamesz; 425 olen += MSG_TKN_OSNAME_SIZE; 426 optr += MSG_TKN_OSNAME_SIZE; 427 _flags |= PN_TKN_OSNAME; 428 } else { 429 eprintf(lml, ERR_FATAL, 430 MSG_INTL(MSG_ERR_EXPAND1), 431 NAME(lmp), oname); 432 return (0); 433 } 434 } 435 436 } else if (strncmp(optr, MSG_ORIG(MSG_TKN_OSREL), 437 MSG_TKN_OSREL_SIZE) == 0) { 438 token = (char *)MSG_ORIG(MSG_TKN_OSREL); 439 440 /* 441 * $OSREL expansion required. This is established 442 * from the release[] returned by uname(2). 443 */ 444 if (((omit & PN_TKN_OSREL) == 0) && (uts == 0)) 445 uts = conv_uts(); 446 447 if (((omit & PN_TKN_OSREL) == 0) && 448 (uts && uts->uts_osrelsz)) { 449 if ((nlen += uts->uts_osrelsz) < PATH_MAX) { 450 (void) strncpy(nptr, uts->uts_osrel, 451 uts->uts_osrelsz); 452 nptr = nptr + uts->uts_osrelsz; 453 olen += MSG_TKN_OSREL_SIZE; 454 optr += MSG_TKN_OSREL_SIZE; 455 _flags |= PN_TKN_OSREL; 456 } else { 457 eprintf(lml, ERR_FATAL, 458 MSG_INTL(MSG_ERR_EXPAND1), 459 NAME(lmp), oname); 460 return (0); 461 } 462 } 463 464 } else if ((strncmp(optr, MSG_ORIG(MSG_TKN_ISALIST), 465 MSG_TKN_ISALIST_SIZE) == 0)) { 466 int ok; 467 token = (char *)MSG_ORIG(MSG_TKN_ISALIST); 468 469 /* 470 * $ISALIST expansion required. When accompanied with 471 * a list pointer, this routine updates that pointer 472 * with the new list of potential candidates. Without 473 * this list pointer, only the first expansion is 474 * provided. NOTE, that two $ISLIST expansions within 475 * the same path aren't supported. 476 */ 477 if ((omit & PN_TKN_ISALIST) || isaflag++) 478 ok = 0; 479 else 480 ok = 1; 481 482 if (ok && (isa == 0)) 483 isa = conv_isalist(); 484 485 if (ok && isa && isa->isa_listsz) { 486 size_t no, mlen, tlen, hlen = olen - 1; 487 char *lptr; 488 Isa_opt *opt = isa->isa_opt; 489 490 if ((nlen += opt->isa_namesz) < PATH_MAX) { 491 (void) strncpy(nptr, opt->isa_name, 492 opt->isa_namesz); 493 nptr = nptr + opt->isa_namesz; 494 olen += MSG_TKN_ISALIST_SIZE; 495 optr += MSG_TKN_ISALIST_SIZE; 496 _flags |= PN_TKN_ISALIST; 497 } else { 498 eprintf(lml, ERR_FATAL, 499 MSG_INTL(MSG_ERR_EXPAND1), 500 NAME(lmp), oname); 501 return (0); 502 } 503 504 if (list) { 505 tlen = *len - olen; 506 mlen = ((hlen + tlen) * 507 (isa->isa_optno - 1)) + 508 isa->isa_listsz - opt->isa_namesz + 509 strlen(*list); 510 if ((_list = lptr = malloc(mlen)) == 0) 511 return (0); 512 513 for (no = 1, opt++; no < isa->isa_optno; 514 no++, opt++) { 515 (void) strncpy(lptr, *name, 516 hlen); 517 lptr = lptr + hlen; 518 (void) strncpy(lptr, 519 opt->isa_name, 520 opt->isa_namesz); 521 lptr = lptr + opt->isa_namesz; 522 (void) strncpy(lptr, optr, 523 tlen); 524 lptr = lptr + tlen; 525 *lptr++ = ':'; 526 } 527 if (**list) 528 (void) strcpy(lptr, *list); 529 else 530 *--lptr = '\0'; 531 } 532 } 533 534 } else if (strncmp(optr, MSG_ORIG(MSG_TKN_HWCAP), 535 MSG_TKN_HWCAP_SIZE) == 0) { 536 char *bptr = nptr - 1; 537 char *eptr = optr + MSG_TKN_HWCAP_SIZE; 538 token = (char *)MSG_ORIG(MSG_TKN_HWCAP); 539 540 /* 541 * $HWCAP expansion required. For compatibility with 542 * older environments, only expand this token when hard- 543 * ware capability information is available. This 544 * expansion is only allowed for non-simple pathnames 545 * (must contain a '/'), with the token itself being the 546 * last element of the path. Therefore, all we need do 547 * is test the existence of the string "/$HWCAP\0". 548 */ 549 if (((omit & PN_TKN_HWCAP) == 0) && 550 (rtld_flags2 & RT_FL2_HWCAP) && 551 ((bptr > _name) && (*bptr == '/') && 552 ((*eptr == '\0') || (*eptr == ':')))) { 553 /* 554 * Decrement the present pointer so that the 555 * directories trailing "/" gets nuked later. 556 */ 557 nptr--, nlen--; 558 olen += MSG_TKN_HWCAP_SIZE; 559 optr += MSG_TKN_HWCAP_SIZE; 560 _flags |= PN_TKN_HWCAP; 561 } 562 563 } else { 564 /* 565 * If reserved token was not found, copy the 566 * character. 567 */ 568 *nptr++ = '$'; 569 nlen++; 570 } 571 572 /* 573 * If reserved token was found, and could not be expanded, 574 * this is an error. 575 */ 576 if (token) { 577 if (_flags) 578 flags |= _flags; 579 else { 580 eprintf(lml, ERR_FATAL, 581 MSG_INTL(MSG_ERR_EXPAND2), NAME(lmp), 582 oname, token); 583 return (0); 584 } 585 } 586 _optr = optr; 587 } 588 589 /* 590 * First make sure the current length is shorter than PATH_MAX. We may 591 * arrive here if the given path contains '$' characters which are not 592 * the lead of a reserved token. 593 */ 594 if (nlen >= PATH_MAX) { 595 eprintf(lml, ERR_FATAL, MSG_INTL(MSG_ERR_EXPAND1), NAME(lmp), 596 oname); 597 return (0); 598 } 599 600 /* 601 * If any ISALIST processing has occurred not only do we return the 602 * expanded node we're presently working on, but we can also update the 603 * remaining list so that it is effectively prepended with this node 604 * expanded to all remaining ISALIST options. Note that we can only 605 * handle one ISALIST per node. For more than one ISALIST to be 606 * processed we'd need a better algorithm than above to replace the 607 * newly generated list. Whether we want to encourage the number of 608 * pathname permutations this would provide is another question. So, for 609 * now if more than one ISALIST is encountered we return the original 610 * node untouched. 611 */ 612 if (isaflag) { 613 if (isaflag == 1) { 614 if (list) 615 *list = _list; 616 } else { 617 flags &= ~PN_TKN_ISALIST; 618 619 if ((nptr = calloc(1, (*len + 1))) == 0) 620 return (0); 621 (void) strncpy(nptr, *name, *len); 622 *name = nptr; 623 624 return (TKN_NONE); 625 } 626 } 627 628 /* 629 * Copy any remaining string. Terminate the new string with a null as 630 * this string can be displayed via debugging diagnostics. 631 */ 632 if ((_len = (optr - _optr)) != 0) { 633 if ((nlen += _len) < PATH_MAX) { 634 (void) strncpy(nptr, _optr, _len); 635 nptr = nptr + _len; 636 } else { 637 eprintf(lml, ERR_FATAL, MSG_INTL(MSG_ERR_EXPAND1), 638 NAME(lmp), oname); 639 return (0); 640 } 641 } 642 *nptr = '\0'; 643 644 /* 645 * A path that has been expanded, is typically used to create full 646 * pathnames for objects that will be opened. The final pathname is 647 * resolved to simplify it, and set the stage for possible $ORIGIN 648 * processing. Therefore, it's usually unncessary to resolve the path 649 * at this point. However, if a configuration file, containing 650 * directory information is in use, then we might need to lookup this 651 * path in the configuration file. To keep the number of pathname 652 * resolutions to a minimum, only resolve paths that contain "./". The 653 * use of "$ORIGIN/../lib" will probably only match a configuration file 654 * entry after resolution. 655 */ 656 if (list && ((rtld_flags & (RT_FL_DIRCFG | RT_FL_EXECNAME)) == 657 (RT_FL_DIRCFG | RT_FL_EXECNAME)) && (flags & TKN_DOTSLASH)) { 658 int len; 659 660 if ((len = resolvepath(_name, _name, (PATH_MAX - 1))) >= 0) { 661 nlen = (size_t)len; 662 _name[nlen] = '\0'; 663 } 664 } 665 666 /* 667 * Allocate permanent storage for the new string and return to the user. 668 */ 669 if ((nptr = malloc(nlen + 1)) == 0) 670 return (0); 671 (void) strcpy(nptr, _name); 672 *name = nptr; 673 *len = nlen; 674 675 /* 676 * Return an indication of any token expansion that may have occurred. 677 * Under security, any pathname expanded with the $ORIGIN token must be 678 * validated against any registered secure directories. 679 */ 680 return (flags ? flags : TKN_NONE); 681 } 682 683 /* 684 * Determine whether a pathname is secure. 685 */ 686 static int 687 is_path_secure(const char *opath, Rt_map * clmp, uint_t info, uint_t flags) 688 { 689 Pnode *sdir = LM_SECURE_DIRS(LIST(clmp)->lm_head); 690 char buffer[PATH_MAX], *npath; 691 Lm_list *lml; 692 693 /* 694 * If a pathname originates from a configuration file, use it. The use 695 * of a configuration file is already validated for secure applications, 696 * so if we're using a configuration file, we must be able to use all 697 * that it defines. 698 */ 699 if (info & LA_SER_CONFIG) 700 return (1); 701 702 if ((info & LA_SER_MASK) == 0) { 703 char *str; 704 705 /* 706 * If the pathname specifies a file (rather than a directory), 707 * peel off the file before making the comparison. 708 */ 709 str = strrchr(opath, '/'); 710 711 /* 712 * A simple filename (one containing no "/") is fine, as this 713 * will be combined with search paths to determine the complete 714 * path. Other paths are checked: 715 * 716 * . a full path (one starting with "/") is fine, provided 717 * it isn't a preload/audit path. 718 * . any $ORIGIN expansion 719 * . any relative path 720 */ 721 if (((str == 0) || ((*opath == '/') && (str != opath) && 722 ((info & PN_SER_EXTLOAD) == 0))) && 723 ((flags & PN_TKN_ORIGIN) == 0)) 724 return (1); 725 726 if (str == opath) 727 npath = (char *)MSG_ORIG(MSG_STR_SLASH); 728 else { 729 size_t size; 730 731 if ((size = str - opath) >= PATH_MAX) 732 return (0); 733 734 (void) strncpy(buffer, opath, size); 735 buffer[size] = '\0'; 736 npath = buffer; 737 } 738 } else { 739 /* 740 * A search path, i.e., RPATH, configuration file path, etc. is 741 * used as is. Exceptions to this are: 742 * 743 * . LD_LIBRARY_PATH 744 * . any $ORIGIN expansion 745 * . any relative path 746 */ 747 if (((info & LA_SER_LIBPATH) == 0) && (*opath == '/') && 748 ((flags & PN_TKN_ORIGIN) == 0)) 749 return (1); 750 751 npath = (char *)opath; 752 } 753 754 while (sdir) { 755 if (strcmp(npath, sdir->p_name) == 0) 756 return (1); 757 sdir = sdir->p_next; 758 } 759 760 lml = LIST(clmp); 761 762 /* 763 * The path is insecure, so depending on the caller, provide a 764 * diagnostic. Preloaded, or audit libraries generate a warning, as 765 * the process will run without them. 766 */ 767 if (info & PN_SER_EXTLOAD) { 768 if (lml->lm_flags & LML_FLG_TRC_ENABLE) { 769 if ((FLAGS1(clmp) & FL1_RT_LDDSTUB) == 0) 770 (void) printf(MSG_INTL(MSG_LDD_FIL_ILLEGAL), 771 opath); 772 } else 773 eprintf(lml, ERR_WARNING, MSG_INTL(MSG_SEC_ILLEGAL), 774 opath); 775 776 return (0); 777 } 778 779 /* 780 * Explicit file references are fatal. 781 */ 782 if ((info & LA_SER_MASK) == 0) { 783 if (lml->lm_flags & LML_FLG_TRC_ENABLE) { 784 if ((FLAGS1(clmp) & FL1_RT_LDDSTUB) == 0) { 785 if (lml->lm_flags & 786 (LML_FLG_TRC_VERBOSE | LML_FLG_TRC_SEARCH)) 787 (void) printf(MSG_INTL(MSG_LDD_FIL_FIND), 788 opath, NAME(clmp)); 789 790 if (((rtld_flags & RT_FL_SILENCERR) == 0) || 791 (lml->lm_flags & LML_FLG_TRC_VERBOSE)) 792 (void) printf(MSG_INTL(MSG_LDD_FIL_ILLEGAL), 793 opath); 794 } 795 } else 796 eprintf(lml, ERR_FATAL, MSG_INTL(MSG_SYS_OPEN), opath, 797 strerror(EACCES)); 798 } else { 799 /* 800 * Search paths. 801 */ 802 DBG_CALL(Dbg_libs_ignore(lml, opath)); 803 if ((lml->lm_flags & LML_FLG_TRC_SEARCH) && 804 ((FLAGS1(clmp) & FL1_RT_LDDSTUB) == 0)) 805 (void) printf(MSG_INTL(MSG_LDD_PTH_IGNORE), opath); 806 } 807 return (0); 808 } 809 810 /* 811 * Expand one or more pathnames. This routine is called for all path strings, 812 * i.e., NEEDED, rpaths, default search paths, configuration file search paths, 813 * filtees, etc. The path may be a single pathname, or a colon separated list 814 * of pathnames. Each individual pathname is processed for possible reserved 815 * token expansion. All string nodes are maintained in allocated memory 816 * (regardless of whether they are constant (":"), or token expanded) to 817 * simplify pnode removal. 818 * 819 * The info argument passes in auxiliary information regarding the callers 820 * intended use of the pathnames. This information may be maintained in the 821 * pnode element produced to describe the pathname (i.e., LA_SER_LIBPATH etc.), 822 * or may be used to determine additional security or diagnostic processing. 823 */ 824 Pnode * 825 expand_paths(Rt_map *clmp, const char *list, uint_t orig, uint_t omit) 826 { 827 char *str, *olist = 0, *nlist = (char *)list; 828 Pnode *pnp, *npnp, *opnp; 829 int fnull = FALSE; /* TRUE if empty final path segment seen */ 830 831 for (pnp = opnp = 0, str = nlist; *nlist || fnull; str = nlist) { 832 char *ostr; 833 size_t len, olen; 834 uint_t tkns = 0; 835 836 if (*nlist == ';') 837 ++nlist, ++str; 838 if ((*nlist == ':') || fnull) { 839 /* If not a final null segment, check following one */ 840 fnull = !(fnull || *(nlist + 1)); 841 842 if (*nlist) 843 nlist++; 844 845 /* 846 * When the shell sees a null PATH segment, it 847 * treats it as if it were the cwd (.). We mimic 848 * this behavior for LD_LIBRARY_PATH and runpaths 849 * (mainly for backwards compatibility with previous 850 * behavior). For other paths, this makes no sense, 851 * so we simply ignore the segment. 852 */ 853 if (!(orig & (LA_SER_LIBPATH | LA_SER_RUNPATH))) 854 continue; /* Process next segment */ 855 856 if ((str = strdup(MSG_ORIG(MSG_FMT_CWD))) == NULL) 857 return (NULL); 858 len = MSG_FMT_CWD_SIZE; 859 860 } else { 861 char *elist; 862 863 len = 0; 864 while (*nlist && (*nlist != ':') && (*nlist != ';')) { 865 nlist++, len++; 866 } 867 868 /* Check for a following final null segment */ 869 fnull = (*nlist == ':') && !*(nlist + 1); 870 871 if (*nlist) 872 nlist++; 873 874 /* 875 * Expand the captured string. Besides expanding the 876 * present path/file entry, we may have a new list to 877 * deal with (ISALIST expands to multiple new entries). 878 */ 879 elist = nlist; 880 ostr = str; 881 olen = len; 882 if ((tkns = expand(&str, &len, &elist, orig, omit, 883 clmp)) == 0) 884 return (NULL); 885 886 if (elist != nlist) { 887 if (olist) 888 free(olist); 889 nlist = olist = elist; 890 } 891 } 892 893 /* 894 * If this a secure application, validation of the expanded 895 * pathname may be necessary. 896 */ 897 if (rtld_flags & RT_FL_SECURE) { 898 if (is_path_secure((const char *)str, clmp, orig, 899 tkns) == 0) { 900 free(str); 901 continue; 902 } 903 } 904 905 /* 906 * Allocate a new Pnode for this string. 907 */ 908 if ((npnp = calloc(1, sizeof (Pnode))) == 0) { 909 free(str); 910 return (NULL); 911 } 912 if (opnp == 0) 913 pnp = npnp; 914 else 915 opnp->p_next = npnp; 916 917 if ((orig & PN_SER_MASK) && (tkns & PN_TKN_MASK)) { 918 char *oname; 919 920 /* 921 * If this is a pathname, and any token expansion 922 * occurred, maintain the original string for possible 923 * diagnostic use. 924 */ 925 if ((oname = malloc(olen + 1)) == 0) { 926 free(str); 927 return (NULL); 928 } 929 (void) strncpy(oname, ostr, olen); 930 oname[olen] = '\0'; 931 npnp->p_oname = oname; 932 } 933 npnp->p_name = str; 934 npnp->p_len = len; 935 npnp->p_orig = (orig & (LA_SER_MASK | PN_SER_MASK)) | 936 (tkns & PN_TKN_MASK); 937 938 opnp = npnp; 939 } 940 941 if (olist) 942 free(olist); 943 944 return (pnp); 945 } 946