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 * Copyright (c) 1988 AT&T 22 * All Rights Reserved 23 * 24 * 25 * Copyright (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved. 26 */ 27 28 /* 29 * Print the list of shared objects required by a dynamic executable or shared 30 * object. 31 * 32 * usage is: ldd [-d | -r] [-c] [-D] [-e envar] [-i] [-f] [-L] [-l] [-p] [-s] 33 * [-U | -u] [-v] [-w] file(s) 34 * 35 * ldd opens the file and verifies the information in the elf header. 36 * If the file is a dynamic executable, we set up some environment variables 37 * and exec(2) the file. If the file is a shared object, we preload the 38 * file with a dynamic executable stub. The runtime linker (ld.so.1) actually 39 * provides the diagnostic output, according to the environment variables set. 40 * 41 * If neither -d nor -r is specified, we set only LD_TRACE_LOADED_OBJECTS_E. 42 * The runtime linker will print the pathnames of all dynamic objects it 43 * loads, and then exit. 44 * 45 * If -d or -r is specified, we also set LD_WARN=1; the runtime linker will 46 * perform its normal relocations and issue warning messages for unresolved 47 * references. It will then exit. 48 * If -r is specified, we set LD_BIND_NOW=1, so that the runtime linker 49 * will perform all relocations, otherwise (under -d) the runtime linker 50 * will not perform PLT (function) type relocations. 51 * 52 * If -c is specified we also set LD_NOCONFIG=1, thus disabling any 53 * configuration file use. 54 * 55 * If -D is specified we skip deferred dependency processing. By default, 56 * ldd loads all deferred dependencies. However, during normal process 57 * execution, deferred dependencies are only loaded when an explicit binding 58 * to an individual deferred reference is made. As no user code is executed 59 * under ldd, explicit references to deferred symbols can't be triggered. 60 * 61 * If -e is specified the associated environment variable is set for the 62 * child process that will produce ldd's diagnostics. 63 * 64 * If -i is specified, we set LD_INIT=1. The order of inititialization 65 * sections to be executed is printed. We also set LD_WARN=1. 66 * 67 * If -f is specified, we will run ldd as root on executables that have 68 * an unsercure runtime linker that does not live under the "/usr/lib" 69 * directory. By default we will not let this happen. 70 * 71 * If -l is specified it generates a warning for any auxiliary filter not found. 72 * Prior to 2.8 this forced any filters to load (all) their filtees. This is 73 * now the default, however missing auxiliary filters don't generate any error 74 * diagniostic. See also -L. 75 * 76 * If -L is specified we revert to lazy loading, thus any filtee or lazy 77 * dependency loading is deferred until relocations cause loading. Without 78 * this option we set LD_LOADFLTR=1, thus forcing any filters to load (all) 79 * their filtees, and LD_NOLAZYLOAD=1 thus forcing immediate processing of 80 * any lazy loaded dependencies. 81 * 82 * If -s is specified we also set LD_TRACE_SEARCH_PATH=1, thus enabling 83 * the runtime linker to indicate the search algorithm used. 84 * 85 * If -v is specified we also set LD_VERBOSE=1, thus enabling the runtime 86 * linker to indicate all object dependencies (not just the first object 87 * loaded) together with any versioning requirements. 88 * 89 * If -U or -u is specified unused dependencies are detected. -u causes 90 * LD_UNUSED=1 to be set, which causes dependencies that are unused within the 91 * process to be detected. -U causes LD_UNREF=1 to be set, which causes 92 * unreferenced objects, and unreferenced cyclic dependencies to be detected. 93 * These options assert that at least -d is set as relocation references are 94 * what determine an objects use. 95 * 96 * If -w is specified, no unresolved weak references are allowed. -w causes 97 * LD_NOUNRESWEAK=1 to be set. By default, an unresolved weak reference is 98 * allowed, and a "0" is written to the relocation offset. The -w option 99 * disables this default. Any weak references that can not be resolved result 100 * in relocation error messages. This option has no use without -r or -d. 101 * 102 * If the -p option is specified, no unresolved PARENT or EXTERN references are 103 * allowed. -p causes LD_NOPAREXT=1 to be set. By default, PARENT and EXTERN 104 * references, which have been explicitly assigned via a mapfile when a shared 105 * object was built, imply that a caller will provide the symbols, and hence 106 * these are not reported as relocation errors. Note, the -p option is asserted 107 * by default when either the -r or -d options are used to inspect a dynamic 108 * executable. This option has no use with a shared object without -r or -d. 109 */ 110 #include <fcntl.h> 111 #include <stdio.h> 112 #include <string.h> 113 #include <_libelf.h> 114 #include <stdlib.h> 115 #include <unistd.h> 116 #include <wait.h> 117 #include <locale.h> 118 #include <errno.h> 119 #include <signal.h> 120 #include "machdep.h" 121 #include "sgs.h" 122 #include "conv.h" 123 #include "msg.h" 124 125 static int elf_check(int, char *, char *, Elf *, int); 126 static int run(int, char *, char *, const char *, int); 127 128 129 /* 130 * Define all environment variable strings. The character following the "=" 131 * will be written to, to disable or enable the associated feature. 132 */ 133 static char bind[] = "LD_BIND_NOW= ", 134 load_elf[] = "LD_TRACE_LOADED_OBJECTS_E= ", 135 path[] = "LD_TRACE_SEARCH_PATHS= ", 136 verb[] = "LD_VERBOSE= ", 137 warn[] = "LD_WARN= ", 138 conf[] = "LD_NOCONFIG= ", 139 fltr[] = "LD_LOADFLTR= ", 140 lazy[] = "LD_NOLAZYLOAD=1", 141 init[] = "LD_INIT= ", 142 uref[] = "LD_UNREF= ", 143 used[] = "LD_UNUSED= ", 144 weak[] = "LD_NOUNRESWEAK= ", 145 nope[] = "LD_NOPAREXT= ", 146 defr[] = "LD_DEFERRED= "; 147 static char *load; 148 149 static const char *prefile_32, *prefile_64, *prefile; 150 static APlist *eopts = NULL; 151 152 int 153 main(int argc, char **argv, char **envp) 154 { 155 char *str, *cname = argv[0]; 156 157 Elf *elf; 158 int cflag = 0, dflag = 0, fflag = 0, iflag = 0, Lflag = 0; 159 int lflag = 0, rflag = 0, sflag = 0, Uflag = 0, uflag = 0; 160 int Dflag = 0, pflag = 0, vflag = 0, wflag = 0; 161 int nfile, var, error = 0; 162 Aliste idx; 163 164 /* 165 * Establish locale. 166 */ 167 (void) setlocale(LC_MESSAGES, MSG_ORIG(MSG_STR_EMPTY)); 168 (void) textdomain(MSG_ORIG(MSG_SUNW_OST_SGS)); 169 170 /* 171 * verify command line syntax and process arguments 172 */ 173 opterr = 0; /* disable getopt error mesg */ 174 175 while ((var = getopt(argc, argv, MSG_ORIG(MSG_STR_GETOPT))) != EOF) { 176 switch (var) { 177 case 'c' : /* enable config search */ 178 cflag = 1; 179 break; 180 case 'D' : /* skip deferred dependencies */ 181 Dflag = 1; 182 break; 183 case 'd' : /* perform data relocations */ 184 dflag = 1; 185 if (rflag) 186 error++; 187 break; 188 case 'e' : 189 if (aplist_append(&eopts, optarg, 10) == NULL) { 190 (void) fprintf(stderr, MSG_INTL(MSG_SYS_MALLOC), 191 cname); 192 exit(1); 193 } 194 break; 195 case 'f' : 196 fflag = 1; 197 break; 198 case 'L' : 199 Lflag = 1; 200 break; 201 case 'l' : 202 lflag = 1; 203 break; 204 case 'i' : /* print the order of .init */ 205 iflag = 1; 206 break; 207 case 'p' : 208 pflag = 1; /* expose unreferenced */ 209 break; /* parent or externals */ 210 case 'r' : /* perform all relocations */ 211 rflag = 1; 212 if (dflag) 213 error++; 214 break; 215 case 's' : /* enable search path output */ 216 sflag = 1; 217 break; 218 case 'U' : /* list unreferenced */ 219 Uflag = 1; /* dependencies */ 220 if (uflag) 221 error++; 222 break; 223 case 'u' : /* list unused dependencies */ 224 uflag = 1; 225 if (Uflag) 226 error++; 227 break; 228 case 'v' : /* enable verbose output */ 229 vflag = 1; 230 break; 231 case 'w' : /* expose unresolved weak */ 232 wflag = 1; /* references */ 233 break; 234 default : 235 error++; 236 break; 237 } 238 if (error) 239 break; 240 } 241 if (error) { 242 (void) fprintf(stderr, MSG_INTL(MSG_ARG_USAGE), cname); 243 exit(1); 244 } 245 246 /* 247 * Determine if any of the LD_PRELOAD family is already set in the 248 * environment, if so we'll continue to analyze each object with the 249 * appropriate setting. 250 */ 251 if (((prefile_32 = getenv(MSG_ORIG(MSG_LD_PRELOAD_32))) == NULL) || 252 (*prefile_32 == '\0')) { 253 prefile_32 = MSG_ORIG(MSG_STR_EMPTY); 254 } 255 if (((prefile_64 = getenv(MSG_ORIG(MSG_LD_PRELOAD_64))) == NULL) || 256 (*prefile_64 == '\0')) { 257 prefile_64 = MSG_ORIG(MSG_STR_EMPTY); 258 } 259 if (((prefile = getenv(MSG_ORIG(MSG_LD_PRELOAD))) == NULL) || 260 (*prefile == '\0')) { 261 prefile = MSG_ORIG(MSG_STR_EMPTY); 262 } 263 264 /* 265 * Determine if any environment requests are for the LD_PRELOAD family, 266 * and if so override any environment settings we've established above. 267 */ 268 for (APLIST_TRAVERSE(eopts, idx, str)) { 269 if ((strncmp(str, MSG_ORIG(MSG_LD_PRELOAD_32), 270 MSG_LD_PRELOAD_32_SIZE)) == 0) { 271 str += MSG_LD_PRELOAD_32_SIZE; 272 if ((*str++ == '=') && (*str != '\0')) 273 prefile_32 = str; 274 continue; 275 } 276 if ((strncmp(str, MSG_ORIG(MSG_LD_PRELOAD_64), 277 MSG_LD_PRELOAD_64_SIZE)) == 0) { 278 str += MSG_LD_PRELOAD_64_SIZE; 279 if ((*str++ == '=') && (*str != '\0')) 280 prefile_64 = str; 281 continue; 282 } 283 if ((strncmp(str, MSG_ORIG(MSG_LD_PRELOAD), 284 MSG_LD_PRELOAD_SIZE)) == 0) { 285 str += MSG_LD_PRELOAD_SIZE; 286 if ((*str++ == '=') && (*str != '\0')) 287 prefile = str; 288 continue; 289 } 290 } 291 292 /* 293 * Set the appropriate relocation environment variables (Note unsetting 294 * the environment variables is done just in case the user already 295 * has these in their environment ... sort of thing the test folks 296 * would do :-) 297 */ 298 warn[sizeof (warn) - 2] = (dflag || rflag || Uflag || uflag) ? '1' : 299 '\0'; 300 bind[sizeof (bind) - 2] = (rflag) ? '1' : '\0'; 301 path[sizeof (path) - 2] = (sflag) ? '1' : '\0'; 302 verb[sizeof (verb) - 2] = (vflag) ? '1' : '\0'; 303 fltr[sizeof (fltr) - 2] = (Lflag) ? '\0' : (lflag) ? '2' : '1'; 304 init[sizeof (init) - 2] = (iflag) ? '1' : '\0'; 305 conf[sizeof (conf) - 2] = (cflag) ? '1' : '\0'; 306 lazy[sizeof (lazy) - 2] = (Lflag) ? '\0' : '1'; 307 uref[sizeof (uref) - 2] = (Uflag) ? '1' : '\0'; 308 used[sizeof (used) - 2] = (uflag) ? '1' : '\0'; 309 weak[sizeof (weak) - 2] = (wflag) ? '1' : '\0'; 310 nope[sizeof (nope) - 2] = (pflag) ? '1' : '\0'; 311 defr[sizeof (defr) - 2] = (Dflag) ? '\0' : '1'; 312 313 /* 314 * coordinate libelf's version information 315 */ 316 if (elf_version(EV_CURRENT) == EV_NONE) { 317 (void) fprintf(stderr, MSG_INTL(MSG_ELF_LIBELF), cname, 318 EV_CURRENT); 319 exit(1); 320 } 321 322 /* 323 * Loop through remaining arguments. Note that from here on there 324 * are no exit conditions so that we can process a list of files, 325 * any error condition is retained for a final exit status. 326 */ 327 nfile = argc - optind; 328 for (; optind < argc; optind++) { 329 char *fname = argv[optind]; 330 331 /* 332 * Open file (do this before checking access so that we can 333 * provide the user with better diagnostics). 334 */ 335 if ((var = open(fname, O_RDONLY)) == -1) { 336 int err = errno; 337 (void) fprintf(stderr, MSG_INTL(MSG_SYS_OPEN), cname, 338 fname, strerror(err)); 339 error = 1; 340 continue; 341 } 342 343 /* 344 * Get the files elf descriptor and process it as an elf file. 345 */ 346 elf = elf_begin(var, ELF_C_READ, (Elf *)0); 347 switch (elf_kind(elf)) { 348 case ELF_K_AR : 349 (void) fprintf(stderr, MSG_INTL(MSG_USP_NODYNORSO), 350 cname, fname); 351 error = 1; 352 break; 353 case ELF_K_ELF: 354 if (elf_check(nfile, fname, cname, elf, fflag) != 0) 355 error = 1; 356 break; 357 case ELF_K_COFF: 358 default: 359 (void) fprintf(stderr, MSG_INTL(MSG_USP_UNKNOWN), 360 cname, fname); 361 error = 1; 362 break; 363 } 364 (void) elf_end(elf); 365 (void) close(var); 366 } 367 return (error); 368 } 369 370 371 372 static int 373 elf_check(int nfile, char *fname, char *cname, Elf *elf, int fflag) 374 { 375 Conv_inv_buf_t inv_buf; 376 GElf_Ehdr ehdr; 377 GElf_Phdr phdr; 378 int dynamic = 0, interp = 0, cnt, class; 379 380 /* 381 * verify information in file header 382 */ 383 if (gelf_getehdr(elf, &ehdr) == NULL) { 384 (void) fprintf(stderr, MSG_INTL(MSG_ELF_GETEHDR), 385 cname, fname, elf_errmsg(-1)); 386 return (1); 387 } 388 389 /* 390 * Compatible machine 391 */ 392 if ((ehdr.e_machine != M_MACH_32) && (ehdr.e_machine != M_MACH_64) && 393 (ehdr.e_machine != M_MACHPLUS)) { 394 (void) fprintf(stderr, MSG_INTL(MSG_ELF_MACHTYPE), cname, fname, 395 conv_ehdr_mach(ehdr.e_machine, 0, &inv_buf)); 396 return (1); 397 } 398 399 /* 400 * Compatible encoding (byte order) 401 */ 402 if (ehdr.e_ident[EI_DATA] != M_DATA) { 403 (void) fprintf(stderr, MSG_INTL(MSG_ELF_DATA), cname, fname, 404 conv_ehdr_data(ehdr.e_ident[EI_DATA], 0, &inv_buf)); 405 return (1); 406 } 407 408 /* 409 * Compatible class 410 */ 411 switch (class = ehdr.e_ident[EI_CLASS]) { 412 case ELFCLASS32: 413 /* 414 * If M_MACH is not the same thing as M_MACHPLUS and this 415 * is an M_MACHPLUS object, then the corresponding header 416 * flag must be set. 417 */ 418 if ((ehdr.e_machine != M_MACH) && 419 ((ehdr.e_flags & M_FLAGSPLUS) == 0)) { 420 (void) fprintf(stderr, MSG_INTL(MSG_ELF_MACHFLAGS), 421 cname, fname); 422 return (1); 423 } 424 break; 425 case ELFCLASS64: 426 /* Requires 64-bit kernel */ 427 if (conv_sys_eclass() == ELFCLASS32) { 428 (void) fprintf(stderr, MSG_INTL(MSG_ELF_KCLASS32), 429 cname, fname, conv_ehdr_class(class, 0, &inv_buf)); 430 return (1); 431 } 432 break; 433 default: 434 (void) fprintf(stderr, MSG_INTL(MSG_ELF_CLASS), cname, fname, 435 conv_ehdr_class(class, 0, &inv_buf)); 436 return (1); 437 } 438 439 /* 440 * Object type 441 */ 442 if ((ehdr.e_type != ET_EXEC) && (ehdr.e_type != ET_DYN) && 443 (ehdr.e_type != ET_REL)) { 444 (void) fprintf(stderr, MSG_INTL(MSG_ELF_BADMAGIC), 445 cname, fname); 446 return (1); 447 } 448 449 /* 450 * Check that the file is executable. Dynamic executables must be 451 * executable to be exec'ed for ldd(1) to function. 452 */ 453 if ((access(fname, X_OK) != 0) && (ehdr.e_type == ET_EXEC)) { 454 (void) fprintf(stderr, MSG_INTL(MSG_USP_NOTEXEC), 455 cname, fname); 456 return (1); 457 } 458 459 /* 460 * Determine whether we have a dynamic section or interpretor. 461 */ 462 for (cnt = 0; cnt < (int)ehdr.e_phnum; cnt++) { 463 if (dynamic && interp) 464 break; 465 466 if (gelf_getphdr(elf, cnt, &phdr) == NULL) { 467 (void) fprintf(stderr, MSG_INTL(MSG_ELF_GETPHDR), 468 cname, fname, elf_errmsg(-1)); 469 return (1); 470 } 471 472 if (phdr.p_type == PT_DYNAMIC) { 473 dynamic = 1; 474 continue; 475 } 476 477 if (phdr.p_type != PT_INTERP) 478 continue; 479 480 interp = 1; 481 482 /* 483 * If fflag is not set, and euid == root, and the interpreter 484 * does not live under /lib, /usr/lib or /etc/lib then don't 485 * allow ldd to execute the image. This prevents someone 486 * creating a `trojan horse' by substituting their own 487 * interpreter that could preform privileged operations 488 * when ldd is against it. 489 */ 490 if ((fflag == 0) && (geteuid() == 0) && 491 (strcmp(fname, conv_lddstub(class)) != 0)) { 492 char *interpreter; 493 494 /* 495 * Does the interpreter live under a trusted directory. 496 */ 497 interpreter = elf_getident(elf, 0) + phdr.p_offset; 498 499 if ((strncmp(interpreter, MSG_ORIG(MSG_PTH_USRLIB), 500 MSG_PTH_USRLIB_SIZE) != 0) && 501 (strncmp(interpreter, MSG_ORIG(MSG_PTH_LIB), 502 MSG_PTH_LIB_SIZE) != 0) && 503 (strncmp(interpreter, MSG_ORIG(MSG_PTH_ETCLIB), 504 MSG_PTH_ETCLIB_SIZE) != 0)) { 505 (void) fprintf(stderr, MSG_INTL(MSG_USP_ELFINS), 506 cname, fname, interpreter); 507 return (1); 508 } 509 } 510 } 511 512 /* 513 * Catch the case of a static executable (ie, an ET_EXEC that has a set 514 * of program headers but no PT_DYNAMIC). 515 */ 516 if (ehdr.e_phnum && !dynamic) { 517 (void) fprintf(stderr, MSG_INTL(MSG_USP_NODYNORSO), cname, 518 fname); 519 return (1); 520 } 521 522 /* 523 * If there is a dynamic section, then check for the DF_1_NOHDR 524 * flag, and bail if it is present. Such objects are created using 525 * a mapfile option (?N in the version 1 syntax, or HDR_NOALLOC 526 * otherwise). The ELF header and program headers are 527 * not mapped as part of the first segment, and virtual addresses 528 * are computed without them. If ldd tries to interpret such 529 * a file, it will become confused and generate bad output or 530 * crash. Such objects are always special purpose files (like an OS 531 * kernel) --- files for which the ldd operation doesn't make sense. 532 */ 533 if (dynamic && (_gelf_getdyndtflags_1(elf) & DF_1_NOHDR)) { 534 (void) fprintf(stderr, MSG_INTL(MSG_USP_NOHDR), cname, 535 fname); 536 return (1); 537 } 538 539 load = load_elf; 540 541 /* 542 * Run the required program (shared and relocatable objects require the 543 * use of lddstub). 544 */ 545 if ((ehdr.e_type == ET_EXEC) && interp) 546 return (run(nfile, cname, fname, (const char *)fname, class)); 547 else 548 return (run(nfile, cname, fname, conv_lddstub(class), class)); 549 } 550 551 552 /* 553 * Run the required program, setting the preload and trace environment 554 * variables accordingly. 555 */ 556 static int 557 run(int nfile, char *cname, char *fname, const char *ename, int class) 558 { 559 const char *preload = 0; 560 int pid, status; 561 562 if ((pid = fork()) == -1) { 563 int err = errno; 564 (void) fprintf(stderr, MSG_INTL(MSG_SYS_FORK), cname, 565 strerror(err)); 566 return (1); 567 } 568 569 if (pid) { /* parent */ 570 while (wait(&status) != pid) 571 ; 572 if (WIFSIGNALED(status) && ((WSIGMASK & status) != SIGPIPE)) { 573 (void) fprintf(stderr, MSG_INTL(MSG_SYS_EXEC), cname, 574 fname); 575 (void) fprintf(stderr, MSG_INTL(MSG_SYS_EXEC_SIG), 576 (WSIGMASK & status), ((status & WCOREFLG) ? 577 MSG_INTL(MSG_SYS_EXEC_CORE) : 578 MSG_ORIG(MSG_STR_EMPTY))); 579 status = 1; 580 } else if (WHIBYTE(status)) { 581 (void) fprintf(stderr, MSG_INTL(MSG_SYS_EXEC), cname, 582 fname); 583 (void) fprintf(stderr, MSG_INTL(MSG_SYS_EXEC_STAT), 584 WHIBYTE(status)); 585 status = 1; 586 } 587 } else { /* child */ 588 Aliste idx; 589 char *str; 590 size_t size; 591 592 /* 593 * When using ldd(1) to analyze a shared object we preload the 594 * shared object with lddstub. Any additional preload 595 * requirements are added after the object being analyzed, this 596 * allows us to skip the first object but produce diagnostics 597 * for each other preloaded object. 598 */ 599 if (fname != ename) { 600 char *str; 601 const char *files = prefile; 602 const char *format = MSG_ORIG(MSG_STR_FMT1); 603 604 for (str = fname; *str; str++) 605 if (*str == '/') { 606 format = MSG_ORIG(MSG_STR_FMT2); 607 break; 608 } 609 610 preload = MSG_ORIG(MSG_LD_PRELOAD); 611 612 /* 613 * Determine which preload files and preload environment 614 * variable to use. 615 */ 616 if (class == ELFCLASS64) { 617 if (prefile_64 != MSG_ORIG(MSG_STR_EMPTY)) { 618 files = prefile_64; 619 preload = MSG_ORIG(MSG_LD_PRELOAD_64); 620 } 621 } else { 622 if (prefile_32 != MSG_ORIG(MSG_STR_EMPTY)) { 623 files = prefile_32; 624 preload = MSG_ORIG(MSG_LD_PRELOAD_32); 625 } 626 } 627 628 if ((str = (char *)malloc(strlen(preload) + 629 strlen(fname) + strlen(files) + 5)) == 0) { 630 (void) fprintf(stderr, MSG_INTL(MSG_SYS_MALLOC), 631 cname); 632 exit(1); 633 } 634 635 (void) sprintf(str, format, preload, fname, files); 636 if (putenv(str) != 0) { 637 (void) fprintf(stderr, MSG_INTL(MSG_ENV_FAILED), 638 cname); 639 exit(1); 640 } 641 642 /* 643 * The pointer "load" has be assigned to load_elf[]. 644 * Use the size of load_elf[]. 645 */ 646 load[sizeof (load_elf) - 2] = '2'; 647 } else 648 load[sizeof (load_elf) - 2] = '1'; 649 650 651 /* 652 * Establish new environment variables to affect the child 653 * process. 654 */ 655 if ((putenv(warn) != 0) || (putenv(bind) != 0) || 656 (putenv(path) != 0) || (putenv(verb) != 0) || 657 (putenv(fltr) != 0) || (putenv(conf) != 0) || 658 (putenv(init) != 0) || (putenv(lazy) != 0) || 659 (putenv(uref) != 0) || (putenv(used) != 0) || 660 (putenv(weak) != 0) || (putenv(load) != 0) || 661 (putenv(nope) != 0) || (putenv(defr) != 0)) { 662 (void) fprintf(stderr, MSG_INTL(MSG_ENV_FAILED), cname); 663 exit(1); 664 } 665 666 /* 667 * Establish explicit environment requires (but don't override 668 * any preload request established to process a shared object). 669 */ 670 size = 0; 671 for (APLIST_TRAVERSE(eopts, idx, str)) { 672 if (preload) { 673 if (size == 0) 674 size = strlen(preload); 675 if ((strncmp(preload, str, size) == 0) && 676 (str[size] == '=')) { 677 continue; 678 } 679 } 680 if (putenv(str) != 0) { 681 (void) fprintf(stderr, MSG_INTL(MSG_ENV_FAILED), 682 cname); 683 exit(1); 684 } 685 } 686 687 /* 688 * Execute the object and let ld.so.1 do the rest. 689 */ 690 if (nfile > 1) 691 (void) printf(MSG_ORIG(MSG_STR_FMT3), fname); 692 (void) fflush(stdout); 693 if ((execl(ename, ename, (char *)0)) == -1) { 694 (void) fprintf(stderr, MSG_INTL(MSG_SYS_EXEC), cname, 695 fname); 696 perror(ename); 697 _exit(0); 698 /* NOTREACHED */ 699 } 700 } 701 return (status); 702 } 703 704 const char * 705 _ldd_msg(Msg mid) 706 { 707 return (gettext(MSG_ORIG(mid))); 708 } 709