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 "a.out.h" 124 #include "msg.h" 125 126 static int elf_check(int, char *, char *, Elf *, int); 127 static int run(int, char *, char *, const char *, int); 128 129 130 /* 131 * Define all environment variable strings. The character following the "=" 132 * will be written to, to disable or enable the associated feature. 133 */ 134 static char bind[] = "LD_BIND_NOW= ", 135 load_elf[] = "LD_TRACE_LOADED_OBJECTS_E= ", 136 path[] = "LD_TRACE_SEARCH_PATHS= ", 137 verb[] = "LD_VERBOSE= ", 138 warn[] = "LD_WARN= ", 139 conf[] = "LD_NOCONFIG= ", 140 fltr[] = "LD_LOADFLTR= ", 141 lazy[] = "LD_NOLAZYLOAD=1", 142 init[] = "LD_INIT= ", 143 uref[] = "LD_UNREF= ", 144 used[] = "LD_UNUSED= ", 145 weak[] = "LD_NOUNRESWEAK= ", 146 nope[] = "LD_NOPAREXT= ", 147 defr[] = "LD_DEFERRED= "; 148 static char *load; 149 150 static const char *prefile_32, *prefile_64, *prefile; 151 static APlist *eopts = NULL; 152 153 int 154 main(int argc, char **argv, char **envp) 155 { 156 char *str, *cname = argv[0]; 157 158 Elf *elf; 159 int cflag = 0, dflag = 0, fflag = 0, iflag = 0, Lflag = 0; 160 int lflag = 0, rflag = 0, sflag = 0, Uflag = 0, uflag = 0; 161 int Dflag = 0, pflag = 0, vflag = 0, wflag = 0; 162 int nfile, var, error = 0; 163 Aliste idx; 164 165 /* 166 * If we're on a 64-bit kernel, try to exec a full 64-bit version of 167 * the binary. If successful, conv_check_native() won't return. 168 * 169 * This is done to ensure that ldd can handle objects >2GB. 170 * ldd uses libelf, which is not large file capable. The 171 * 64-bit ldd can handle any sized object. 172 */ 173 (void) conv_check_native(argv, envp); 174 175 /* 176 * Establish locale. 177 */ 178 (void) setlocale(LC_MESSAGES, MSG_ORIG(MSG_STR_EMPTY)); 179 (void) textdomain(MSG_ORIG(MSG_SUNW_OST_SGS)); 180 181 /* 182 * verify command line syntax and process arguments 183 */ 184 opterr = 0; /* disable getopt error mesg */ 185 186 while ((var = getopt(argc, argv, MSG_ORIG(MSG_STR_GETOPT))) != EOF) { 187 switch (var) { 188 case 'c' : /* enable config search */ 189 cflag = 1; 190 break; 191 case 'D' : /* skip deferred dependencies */ 192 Dflag = 1; 193 break; 194 case 'd' : /* perform data relocations */ 195 dflag = 1; 196 if (rflag) 197 error++; 198 break; 199 case 'e' : 200 if (aplist_append(&eopts, optarg, 10) == NULL) { 201 (void) fprintf(stderr, MSG_INTL(MSG_SYS_MALLOC), 202 cname); 203 exit(1); 204 } 205 break; 206 case 'f' : 207 fflag = 1; 208 break; 209 case 'L' : 210 Lflag = 1; 211 break; 212 case 'l' : 213 lflag = 1; 214 break; 215 case 'i' : /* print the order of .init */ 216 iflag = 1; 217 break; 218 case 'p' : 219 pflag = 1; /* expose unreferenced */ 220 break; /* parent or externals */ 221 case 'r' : /* perform all relocations */ 222 rflag = 1; 223 if (dflag) 224 error++; 225 break; 226 case 's' : /* enable search path output */ 227 sflag = 1; 228 break; 229 case 'U' : /* list unreferenced */ 230 Uflag = 1; /* dependencies */ 231 if (uflag) 232 error++; 233 break; 234 case 'u' : /* list unused dependencies */ 235 uflag = 1; 236 if (Uflag) 237 error++; 238 break; 239 case 'v' : /* enable verbose output */ 240 vflag = 1; 241 break; 242 case 'w' : /* expose unresolved weak */ 243 wflag = 1; /* references */ 244 break; 245 default : 246 error++; 247 break; 248 } 249 if (error) 250 break; 251 } 252 if (error) { 253 (void) fprintf(stderr, MSG_INTL(MSG_ARG_USAGE), cname); 254 exit(1); 255 } 256 257 /* 258 * Determine if any of the LD_PRELOAD family is already set in the 259 * environment, if so we'll continue to analyze each object with the 260 * appropriate setting. 261 */ 262 if (((prefile_32 = getenv(MSG_ORIG(MSG_LD_PRELOAD_32))) == NULL) || 263 (*prefile_32 == '\0')) { 264 prefile_32 = MSG_ORIG(MSG_STR_EMPTY); 265 } 266 if (((prefile_64 = getenv(MSG_ORIG(MSG_LD_PRELOAD_64))) == NULL) || 267 (*prefile_64 == '\0')) { 268 prefile_64 = MSG_ORIG(MSG_STR_EMPTY); 269 } 270 if (((prefile = getenv(MSG_ORIG(MSG_LD_PRELOAD))) == NULL) || 271 (*prefile == '\0')) { 272 prefile = MSG_ORIG(MSG_STR_EMPTY); 273 } 274 275 /* 276 * Determine if any environment requests are for the LD_PRELOAD family, 277 * and if so override any environment settings we've established above. 278 */ 279 for (APLIST_TRAVERSE(eopts, idx, str)) { 280 if ((strncmp(str, MSG_ORIG(MSG_LD_PRELOAD_32), 281 MSG_LD_PRELOAD_32_SIZE)) == 0) { 282 str += MSG_LD_PRELOAD_32_SIZE; 283 if ((*str++ == '=') && (*str != '\0')) 284 prefile_32 = str; 285 continue; 286 } 287 if ((strncmp(str, MSG_ORIG(MSG_LD_PRELOAD_64), 288 MSG_LD_PRELOAD_64_SIZE)) == 0) { 289 str += MSG_LD_PRELOAD_64_SIZE; 290 if ((*str++ == '=') && (*str != '\0')) 291 prefile_64 = str; 292 continue; 293 } 294 if ((strncmp(str, MSG_ORIG(MSG_LD_PRELOAD), 295 MSG_LD_PRELOAD_SIZE)) == 0) { 296 str += MSG_LD_PRELOAD_SIZE; 297 if ((*str++ == '=') && (*str != '\0')) 298 prefile = str; 299 continue; 300 } 301 } 302 303 /* 304 * Set the appropriate relocation environment variables (Note unsetting 305 * the environment variables is done just in case the user already 306 * has these in their environment ... sort of thing the test folks 307 * would do :-) 308 */ 309 warn[sizeof (warn) - 2] = (dflag || rflag || Uflag || uflag) ? '1' : 310 '\0'; 311 bind[sizeof (bind) - 2] = (rflag) ? '1' : '\0'; 312 path[sizeof (path) - 2] = (sflag) ? '1' : '\0'; 313 verb[sizeof (verb) - 2] = (vflag) ? '1' : '\0'; 314 fltr[sizeof (fltr) - 2] = (Lflag) ? '\0' : (lflag) ? '2' : '1'; 315 init[sizeof (init) - 2] = (iflag) ? '1' : '\0'; 316 conf[sizeof (conf) - 2] = (cflag) ? '1' : '\0'; 317 lazy[sizeof (lazy) - 2] = (Lflag) ? '\0' : '1'; 318 uref[sizeof (uref) - 2] = (Uflag) ? '1' : '\0'; 319 used[sizeof (used) - 2] = (uflag) ? '1' : '\0'; 320 weak[sizeof (weak) - 2] = (wflag) ? '1' : '\0'; 321 nope[sizeof (nope) - 2] = (pflag) ? '1' : '\0'; 322 defr[sizeof (defr) - 2] = (Dflag) ? '\0' : '1'; 323 324 /* 325 * coordinate libelf's version information 326 */ 327 if (elf_version(EV_CURRENT) == EV_NONE) { 328 (void) fprintf(stderr, MSG_INTL(MSG_ELF_LIBELF), cname, 329 EV_CURRENT); 330 exit(1); 331 } 332 333 /* 334 * Loop through remaining arguments. Note that from here on there 335 * are no exit conditions so that we can process a list of files, 336 * any error condition is retained for a final exit status. 337 */ 338 nfile = argc - optind; 339 for (; optind < argc; optind++) { 340 char *fname = argv[optind]; 341 342 /* 343 * Open file (do this before checking access so that we can 344 * provide the user with better diagnostics). 345 */ 346 if ((var = open(fname, O_RDONLY)) == -1) { 347 int err = errno; 348 (void) fprintf(stderr, MSG_INTL(MSG_SYS_OPEN), cname, 349 fname, strerror(err)); 350 error = 1; 351 continue; 352 } 353 354 /* 355 * Get the files elf descriptor and process it as an elf file. 356 */ 357 elf = elf_begin(var, ELF_C_READ, (Elf *)0); 358 switch (elf_kind(elf)) { 359 case ELF_K_AR : 360 (void) fprintf(stderr, MSG_INTL(MSG_USP_NODYNORSO), 361 cname, fname); 362 error = 1; 363 break; 364 case ELF_K_ELF: 365 if (elf_check(nfile, fname, cname, elf, fflag) != 0) 366 error = 1; 367 break; 368 case ELF_K_COFF: 369 default: 370 (void) fprintf(stderr, MSG_INTL(MSG_USP_UNKNOWN), 371 cname, fname); 372 error = 1; 373 break; 374 } 375 (void) elf_end(elf); 376 (void) close(var); 377 } 378 return (error); 379 } 380 381 382 383 static int 384 elf_check(int nfile, char *fname, char *cname, Elf *elf, int fflag) 385 { 386 Conv_inv_buf_t inv_buf; 387 GElf_Ehdr ehdr; 388 GElf_Phdr phdr; 389 int dynamic = 0, interp = 0, cnt, class; 390 391 /* 392 * verify information in file header 393 */ 394 if (gelf_getehdr(elf, &ehdr) == NULL) { 395 (void) fprintf(stderr, MSG_INTL(MSG_ELF_GETEHDR), 396 cname, fname, elf_errmsg(-1)); 397 return (1); 398 } 399 400 /* 401 * Compatible machine 402 */ 403 if ((ehdr.e_machine != M_MACH_32) && (ehdr.e_machine != M_MACH_64) && 404 (ehdr.e_machine != M_MACHPLUS)) { 405 (void) fprintf(stderr, MSG_INTL(MSG_ELF_MACHTYPE), cname, fname, 406 conv_ehdr_mach(ehdr.e_machine, 0, &inv_buf)); 407 return (1); 408 } 409 410 /* 411 * Compatible encoding (byte order) 412 */ 413 if (ehdr.e_ident[EI_DATA] != M_DATA) { 414 (void) fprintf(stderr, MSG_INTL(MSG_ELF_DATA), cname, fname, 415 conv_ehdr_data(ehdr.e_ident[EI_DATA], 0, &inv_buf)); 416 return (1); 417 } 418 419 /* 420 * Compatible class 421 */ 422 switch (class = ehdr.e_ident[EI_CLASS]) { 423 case ELFCLASS32: 424 /* 425 * If M_MACH is not the same thing as M_MACHPLUS and this 426 * is an M_MACHPLUS object, then the corresponding header 427 * flag must be set. 428 */ 429 if ((ehdr.e_machine != M_MACH) && 430 ((ehdr.e_flags & M_FLAGSPLUS) == 0)) { 431 (void) fprintf(stderr, MSG_INTL(MSG_ELF_MACHFLAGS), 432 cname, fname); 433 return (1); 434 } 435 break; 436 case ELFCLASS64: 437 /* Requires 64-bit kernel */ 438 if (conv_sys_eclass() == ELFCLASS32) { 439 (void) fprintf(stderr, MSG_INTL(MSG_ELF_KCLASS32), 440 cname, fname, conv_ehdr_class(class, 0, &inv_buf)); 441 return (1); 442 } 443 break; 444 default: 445 (void) fprintf(stderr, MSG_INTL(MSG_ELF_CLASS), cname, fname, 446 conv_ehdr_class(class, 0, &inv_buf)); 447 return (1); 448 } 449 450 /* 451 * Object type 452 */ 453 if ((ehdr.e_type != ET_EXEC) && (ehdr.e_type != ET_DYN) && 454 (ehdr.e_type != ET_REL)) { 455 (void) fprintf(stderr, MSG_INTL(MSG_ELF_BADMAGIC), 456 cname, fname); 457 return (1); 458 } 459 460 /* 461 * Check that the file is executable. Dynamic executables must be 462 * executable to be exec'ed for ldd(1) to function. 463 */ 464 if ((access(fname, X_OK) != 0) && (ehdr.e_type == ET_EXEC)) { 465 (void) fprintf(stderr, MSG_INTL(MSG_USP_NOTEXEC), 466 cname, fname); 467 return (1); 468 } 469 470 /* 471 * Determine whether we have a dynamic section or interpretor. 472 */ 473 for (cnt = 0; cnt < (int)ehdr.e_phnum; cnt++) { 474 if (dynamic && interp) 475 break; 476 477 if (gelf_getphdr(elf, cnt, &phdr) == NULL) { 478 (void) fprintf(stderr, MSG_INTL(MSG_ELF_GETPHDR), 479 cname, fname, elf_errmsg(-1)); 480 return (1); 481 } 482 483 if (phdr.p_type == PT_DYNAMIC) { 484 dynamic = 1; 485 continue; 486 } 487 488 if (phdr.p_type != PT_INTERP) 489 continue; 490 491 interp = 1; 492 493 /* 494 * If fflag is not set, and euid == root, and the interpreter 495 * does not live under /lib, /usr/lib or /etc/lib then don't 496 * allow ldd to execute the image. This prevents someone 497 * creating a `trojan horse' by substituting their own 498 * interpreter that could preform privileged operations 499 * when ldd is against it. 500 */ 501 if ((fflag == 0) && (geteuid() == 0) && 502 (strcmp(fname, conv_lddstub(class)) != 0)) { 503 char *interpreter; 504 505 /* 506 * Does the interpreter live under a trusted directory. 507 */ 508 interpreter = elf_getident(elf, 0) + phdr.p_offset; 509 510 if ((strncmp(interpreter, MSG_ORIG(MSG_PTH_USRLIB), 511 MSG_PTH_USRLIB_SIZE) != 0) && 512 (strncmp(interpreter, MSG_ORIG(MSG_PTH_LIB), 513 MSG_PTH_LIB_SIZE) != 0) && 514 (strncmp(interpreter, MSG_ORIG(MSG_PTH_ETCLIB), 515 MSG_PTH_ETCLIB_SIZE) != 0)) { 516 (void) fprintf(stderr, MSG_INTL(MSG_USP_ELFINS), 517 cname, fname, interpreter); 518 return (1); 519 } 520 } 521 } 522 523 /* 524 * Catch the case of a static executable (ie, an ET_EXEC that has a set 525 * of program headers but no PT_DYNAMIC). 526 */ 527 if (ehdr.e_phnum && !dynamic) { 528 (void) fprintf(stderr, MSG_INTL(MSG_USP_NODYNORSO), cname, 529 fname); 530 return (1); 531 } 532 533 /* 534 * If there is a dynamic section, then check for the DF_1_NOHDR 535 * flag, and bail if it is present. Such objects are created using 536 * a mapfile option (?N in the version 1 syntax, or HDR_NOALLOC 537 * otherwise). The ELF header and program headers are 538 * not mapped as part of the first segment, and virtual addresses 539 * are computed without them. If ldd tries to interpret such 540 * a file, it will become confused and generate bad output or 541 * crash. Such objects are always special purpose files (like an OS 542 * kernel) --- files for which the ldd operation doesn't make sense. 543 */ 544 if (dynamic && (_gelf_getdyndtflags_1(elf) & DF_1_NOHDR)) { 545 (void) fprintf(stderr, MSG_INTL(MSG_USP_NOHDR), cname, 546 fname); 547 return (1); 548 } 549 550 load = load_elf; 551 552 /* 553 * Run the required program (shared and relocatable objects require the 554 * use of lddstub). 555 */ 556 if ((ehdr.e_type == ET_EXEC) && interp) 557 return (run(nfile, cname, fname, (const char *)fname, class)); 558 else 559 return (run(nfile, cname, fname, conv_lddstub(class), class)); 560 } 561 562 563 /* 564 * Run the required program, setting the preload and trace environment 565 * variables accordingly. 566 */ 567 static int 568 run(int nfile, char *cname, char *fname, const char *ename, int class) 569 { 570 const char *preload = 0; 571 int pid, status; 572 573 if ((pid = fork()) == -1) { 574 int err = errno; 575 (void) fprintf(stderr, MSG_INTL(MSG_SYS_FORK), cname, 576 strerror(err)); 577 return (1); 578 } 579 580 if (pid) { /* parent */ 581 while (wait(&status) != pid) 582 ; 583 if (WIFSIGNALED(status) && ((WSIGMASK & status) != SIGPIPE)) { 584 (void) fprintf(stderr, MSG_INTL(MSG_SYS_EXEC), cname, 585 fname); 586 (void) fprintf(stderr, MSG_INTL(MSG_SYS_EXEC_SIG), 587 (WSIGMASK & status), ((status & WCOREFLG) ? 588 MSG_INTL(MSG_SYS_EXEC_CORE) : 589 MSG_ORIG(MSG_STR_EMPTY))); 590 status = 1; 591 } else if (WHIBYTE(status)) { 592 (void) fprintf(stderr, MSG_INTL(MSG_SYS_EXEC), cname, 593 fname); 594 (void) fprintf(stderr, MSG_INTL(MSG_SYS_EXEC_STAT), 595 WHIBYTE(status)); 596 status = 1; 597 } 598 } else { /* child */ 599 Aliste idx; 600 char *str; 601 size_t size; 602 603 /* 604 * When using ldd(1) to analyze a shared object we preload the 605 * shared object with lddstub. Any additional preload 606 * requirements are added after the object being analyzed, this 607 * allows us to skip the first object but produce diagnostics 608 * for each other preloaded object. 609 */ 610 if (fname != ename) { 611 char *str; 612 const char *files = prefile; 613 const char *format = MSG_ORIG(MSG_STR_FMT1); 614 615 for (str = fname; *str; str++) 616 if (*str == '/') { 617 format = MSG_ORIG(MSG_STR_FMT2); 618 break; 619 } 620 621 preload = MSG_ORIG(MSG_LD_PRELOAD); 622 623 /* 624 * Determine which preload files and preload environment 625 * variable to use. 626 */ 627 if (class == ELFCLASS64) { 628 if (prefile_64 != MSG_ORIG(MSG_STR_EMPTY)) { 629 files = prefile_64; 630 preload = MSG_ORIG(MSG_LD_PRELOAD_64); 631 } 632 } else { 633 if (prefile_32 != MSG_ORIG(MSG_STR_EMPTY)) { 634 files = prefile_32; 635 preload = MSG_ORIG(MSG_LD_PRELOAD_32); 636 } 637 } 638 639 if ((str = (char *)malloc(strlen(preload) + 640 strlen(fname) + strlen(files) + 5)) == 0) { 641 (void) fprintf(stderr, MSG_INTL(MSG_SYS_MALLOC), 642 cname); 643 exit(1); 644 } 645 646 (void) sprintf(str, format, preload, fname, files); 647 if (putenv(str) != 0) { 648 (void) fprintf(stderr, MSG_INTL(MSG_ENV_FAILED), 649 cname); 650 exit(1); 651 } 652 653 /* 654 * The pointer "load" has be assigned to load_elf[]. 655 * Use the size of load_elf[]. 656 */ 657 load[sizeof (load_elf) - 2] = '2'; 658 } else 659 load[sizeof (load_elf) - 2] = '1'; 660 661 662 /* 663 * Establish new environment variables to affect the child 664 * process. 665 */ 666 if ((putenv(warn) != 0) || (putenv(bind) != 0) || 667 (putenv(path) != 0) || (putenv(verb) != 0) || 668 (putenv(fltr) != 0) || (putenv(conf) != 0) || 669 (putenv(init) != 0) || (putenv(lazy) != 0) || 670 (putenv(uref) != 0) || (putenv(used) != 0) || 671 (putenv(weak) != 0) || (putenv(load) != 0) || 672 (putenv(nope) != 0) || (putenv(defr) != 0)) { 673 (void) fprintf(stderr, MSG_INTL(MSG_ENV_FAILED), cname); 674 exit(1); 675 } 676 677 /* 678 * Establish explicit environment requires (but don't override 679 * any preload request established to process a shared object). 680 */ 681 size = 0; 682 for (APLIST_TRAVERSE(eopts, idx, str)) { 683 if (preload) { 684 if (size == 0) 685 size = strlen(preload); 686 if ((strncmp(preload, str, size) == 0) && 687 (str[size] == '=')) { 688 continue; 689 } 690 } 691 if (putenv(str) != 0) { 692 (void) fprintf(stderr, MSG_INTL(MSG_ENV_FAILED), 693 cname); 694 exit(1); 695 } 696 } 697 698 /* 699 * Execute the object and let ld.so.1 do the rest. 700 */ 701 if (nfile > 1) 702 (void) printf(MSG_ORIG(MSG_STR_FMT3), fname); 703 (void) fflush(stdout); 704 if ((execl(ename, ename, (char *)0)) == -1) { 705 (void) fprintf(stderr, MSG_INTL(MSG_SYS_EXEC), cname, 706 fname); 707 perror(ename); 708 _exit(0); 709 /* NOTREACHED */ 710 } 711 } 712 return (status); 713 } 714 715 const char * 716 _ldd_msg(Msg mid) 717 { 718 return (gettext(MSG_ORIG(mid))); 719 } 720