1 /*- 2 * Copyright (c) 2007 Kai Wang 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/endian.h> 31 #include <sys/mman.h> 32 #include <sys/queue.h> 33 #include <sys/stat.h> 34 #include <archive.h> 35 #include <archive_entry.h> 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <gelf.h> 39 #include <libgen.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <sysexits.h> 44 45 #include "ar.h" 46 47 #define _ARMAG_LEN 8 /* length of ar magic string */ 48 #define _ARHDR_LEN 60 /* length of ar header */ 49 #define _INIT_AS_CAP 128 /* initial archive string table size */ 50 #define _INIT_SYMOFF_CAP (256*(sizeof(uint32_t))) /* initial so table size */ 51 #define _INIT_SYMNAME_CAP 1024 /* initial sn table size */ 52 #define _MAXNAMELEN_SVR4 15 /* max member name length in svr4 variant */ 53 #define _TRUNCATE_LEN 15 /* number of bytes to keep for member name */ 54 55 static void add_to_ar_str_table(struct bsdar *bsdar, const char *name); 56 static void add_to_ar_sym_table(struct bsdar *bsdar, const char *name); 57 static struct ar_obj *create_obj_from_file(struct bsdar *bsdar, 58 const char *name, time_t mtime); 59 static void create_symtab_entry(struct bsdar *bsdar, void *maddr, 60 size_t size); 61 static void free_obj(struct bsdar *bsdar, struct ar_obj *obj); 62 static void insert_obj(struct bsdar *bsdar, struct ar_obj *obj, 63 struct ar_obj *pos); 64 static void read_objs(struct bsdar *bsdar, const char *archive, 65 int checkargv); 66 static void write_archive(struct bsdar *bsdar, char mode); 67 static void write_cleanup(struct bsdar *bsdar); 68 static void write_data(struct bsdar *bsdar, struct archive *a, 69 const void *buf, size_t s); 70 static void write_objs(struct bsdar *bsdar); 71 72 void 73 ar_mode_d(struct bsdar *bsdar) 74 { 75 76 write_archive(bsdar, 'd'); 77 } 78 79 void 80 ar_mode_m(struct bsdar *bsdar) 81 { 82 83 write_archive(bsdar, 'm'); 84 } 85 86 void 87 ar_mode_q(struct bsdar *bsdar) 88 { 89 90 write_archive(bsdar, 'q'); 91 } 92 93 void 94 ar_mode_r(struct bsdar *bsdar) 95 { 96 97 write_archive(bsdar, 'r'); 98 } 99 100 void 101 ar_mode_s(struct bsdar *bsdar) 102 { 103 104 write_archive(bsdar, 's'); 105 } 106 107 void 108 ar_mode_A(struct bsdar *bsdar) 109 { 110 111 write_archive(bsdar, 'A'); 112 } 113 114 /* 115 * Create object from file, return created obj upon success, or NULL 116 * when an error occurs or the member is not newer than existing 117 * one while -u is specified. 118 */ 119 static struct ar_obj * 120 create_obj_from_file(struct bsdar *bsdar, const char *name, time_t mtime) 121 { 122 struct ar_obj *obj; 123 struct stat sb; 124 const char *bname; 125 126 if (name == NULL) 127 return (NULL); 128 129 obj = malloc(sizeof(struct ar_obj)); 130 if (obj == NULL) 131 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 132 if ((obj->fd = open(name, O_RDONLY, 0)) < 0) { 133 bsdar_warnc(bsdar, errno, "can't open file: %s", name); 134 free(obj); 135 return (NULL); 136 } 137 138 if ((bname = basename(name)) == NULL) 139 bsdar_errc(bsdar, EX_SOFTWARE, errno, "basename failed"); 140 if (bsdar->options & AR_TR && strlen(bname) > _TRUNCATE_LEN) { 141 if ((obj->name = malloc(_TRUNCATE_LEN + 1)) == NULL) 142 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 143 (void)strncpy(obj->name, bname, _TRUNCATE_LEN); 144 obj->name[_TRUNCATE_LEN] = '\0'; 145 } else 146 if ((obj->name = strdup(bname)) == NULL) 147 bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 148 149 if (fstat(obj->fd, &sb) < 0) { 150 bsdar_warnc(bsdar, errno, "can't fstat file: %s", obj->name); 151 goto giveup; 152 } 153 if (!S_ISREG(sb.st_mode)) { 154 bsdar_warnc(bsdar, 0, "%s is not an ordinary file", obj->name); 155 goto giveup; 156 } 157 158 /* 159 * When option '-u' is specified and member is not newer than the 160 * existing one, the replace will not happen. While if mtime == 0, 161 * which indicates that this is to "replace a none exist member", 162 * the replace will proceed regardless of '-u'. 163 */ 164 if (mtime != 0 && bsdar->options & AR_U && sb.st_mtime <= mtime) 165 goto giveup; 166 167 /* 168 * When option '-D' is specified, mtime and UID / GID from the file 169 * will be replaced with 0, and file mode with 644. This ensures that 170 * checksums will match for two archives containing the exact same 171 * files. 172 */ 173 if (bsdar->options & AR_D) { 174 obj->uid = 0; 175 obj->gid = 0; 176 obj->mtime = 0; 177 obj->md = S_IFREG | 0644; 178 } else { 179 obj->uid = sb.st_uid; 180 obj->gid = sb.st_gid; 181 obj->mtime = sb.st_mtime; 182 obj->md = sb.st_mode; 183 } 184 obj->size = sb.st_size; 185 obj->dev = sb.st_dev; 186 obj->ino = sb.st_ino; 187 188 if (obj->size == 0) { 189 obj->maddr = NULL; 190 return (obj); 191 } 192 193 if ((obj->maddr = mmap(NULL, obj->size, PROT_READ, 194 MAP_PRIVATE, obj->fd, (off_t)0)) == MAP_FAILED) { 195 bsdar_warnc(bsdar, errno, "can't mmap file: %s", obj->name); 196 goto giveup; 197 } 198 if (close(obj->fd) < 0) 199 bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 200 obj->name); 201 202 return (obj); 203 204 giveup: 205 if (close(obj->fd) < 0) 206 bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 207 obj->name); 208 free(obj->name); 209 free(obj); 210 return (NULL); 211 } 212 213 /* 214 * Free object itself and its associated allocations. 215 */ 216 static void 217 free_obj(struct bsdar *bsdar, struct ar_obj *obj) 218 { 219 if (obj->fd == -1) 220 free(obj->maddr); 221 else 222 if (obj->maddr != NULL && munmap(obj->maddr, obj->size)) 223 bsdar_warnc(bsdar, errno, 224 "can't munmap file: %s", obj->name); 225 free(obj->name); 226 free(obj); 227 } 228 229 /* 230 * Insert obj to the tail, or before/after the pos obj. 231 */ 232 static void 233 insert_obj(struct bsdar *bsdar, struct ar_obj *obj, struct ar_obj *pos) 234 { 235 if (obj == NULL) 236 bsdar_errc(bsdar, EX_SOFTWARE, 0, "try to insert a null obj"); 237 238 if (pos == NULL || obj == pos) 239 /* 240 * If the object to move happens to be the position obj, 241 * or if there is not a pos obj, move it to tail. 242 */ 243 goto tail; 244 245 if (bsdar->options & AR_B) { 246 TAILQ_INSERT_BEFORE(pos, obj, objs); 247 return; 248 } 249 if (bsdar->options & AR_A) { 250 TAILQ_INSERT_AFTER(&bsdar->v_obj, pos, obj, objs); 251 return; 252 } 253 254 tail: 255 TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 256 257 } 258 259 /* 260 * Read objects from archive into v_obj list. Note that checkargv is 261 * set when read_objs is used to read objects from the target of 262 * ADDLIB command (ar script mode), in this case argv array possibly 263 * specifies the members ADDLIB want. 264 */ 265 static void 266 read_objs(struct bsdar *bsdar, const char *archive, int checkargv) 267 { 268 struct archive *a; 269 struct archive_entry *entry; 270 struct ar_obj *obj; 271 const char *name; 272 const char *bname; 273 char *buff; 274 char **av; 275 size_t size; 276 int i, r, find; 277 278 if ((a = archive_read_new()) == NULL) 279 bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed"); 280 archive_read_support_compression_none(a); 281 archive_read_support_format_ar(a); 282 AC(archive_read_open_filename(a, archive, DEF_BLKSZ)); 283 for (;;) { 284 r = archive_read_next_header(a, &entry); 285 if (r == ARCHIVE_FATAL) 286 bsdar_errc(bsdar, EX_DATAERR, 0, "%s", 287 archive_error_string(a)); 288 if (r == ARCHIVE_EOF) 289 break; 290 if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY) 291 bsdar_warnc(bsdar, 0, "%s", archive_error_string(a)); 292 if (r == ARCHIVE_RETRY) { 293 bsdar_warnc(bsdar, 0, "Retrying..."); 294 continue; 295 } 296 297 name = archive_entry_pathname(entry); 298 299 /* 300 * skip pseudo members. 301 */ 302 if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0) 303 continue; 304 305 /* 306 * If checkargv is set, only read those members specified 307 * in argv. 308 */ 309 if (checkargv && bsdar->argc > 0) { 310 find = 0; 311 for(i = 0; i < bsdar->argc; i++) { 312 av = &bsdar->argv[i]; 313 if (*av == NULL) 314 continue; 315 if ((bname = basename(*av)) == NULL) 316 bsdar_errc(bsdar, EX_SOFTWARE, errno, 317 "basename failed"); 318 if (strcmp(bname, name) != 0) 319 continue; 320 321 *av = NULL; 322 find = 1; 323 break; 324 } 325 if (!find) 326 continue; 327 } 328 329 size = archive_entry_size(entry); 330 331 if (size > 0) { 332 if ((buff = malloc(size)) == NULL) 333 bsdar_errc(bsdar, EX_SOFTWARE, errno, 334 "malloc failed"); 335 if (archive_read_data(a, buff, size) != (ssize_t)size) { 336 bsdar_warnc(bsdar, 0, "%s", 337 archive_error_string(a)); 338 free(buff); 339 continue; 340 } 341 } else 342 buff = NULL; 343 344 obj = malloc(sizeof(struct ar_obj)); 345 if (obj == NULL) 346 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 347 obj->maddr = buff; 348 if ((obj->name = strdup(name)) == NULL) 349 bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 350 obj->size = size; 351 obj->uid = archive_entry_uid(entry); 352 obj->gid = archive_entry_gid(entry); 353 obj->md = archive_entry_mode(entry); 354 obj->mtime = archive_entry_mtime(entry); 355 obj->dev = 0; 356 obj->ino = 0; 357 358 /* 359 * Objects from archive have obj->fd set to -1, 360 * for the ease of cleaning up. 361 */ 362 obj->fd = -1; 363 TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 364 } 365 AC(archive_read_close(a)); 366 AC(archive_read_finish(a)); 367 } 368 369 /* 370 * Determine the constitution of resulting archive. 371 */ 372 static void 373 write_archive(struct bsdar *bsdar, char mode) 374 { 375 struct ar_obj *nobj, *obj, *obj_temp, *pos; 376 struct stat sb; 377 const char *bname; 378 char **av; 379 int i; 380 381 TAILQ_INIT(&bsdar->v_obj); 382 nobj = NULL; 383 pos = NULL; 384 memset(&sb, 0, sizeof(sb)); 385 386 /* 387 * Test if the specified archive exists, to figure out 388 * whether we are creating one here. 389 */ 390 if (stat(bsdar->filename, &sb) != 0) { 391 if (errno != ENOENT) { 392 bsdar_warnc(bsdar, 0, "stat %s failed", 393 bsdar->filename); 394 return; 395 } 396 397 /* We do not create archive in mode 'd', 'm' and 's'. */ 398 if (mode != 'r' && mode != 'q') { 399 bsdar_warnc(bsdar, 0, "%s: no such file", 400 bsdar->filename); 401 return; 402 } 403 404 /* Issue a warning if -c is not specified when creating. */ 405 if (!(bsdar->options & AR_C)) 406 bsdar_warnc(bsdar, 0, "creating %s", bsdar->filename); 407 goto new_archive; 408 } 409 410 /* 411 * First read members from existing archive. 412 */ 413 read_objs(bsdar, bsdar->filename, 0); 414 415 /* 416 * For mode 's', no member will be moved, deleted or replaced. 417 */ 418 if (mode == 's') 419 goto write_objs; 420 421 /* 422 * For mode 'q', we don't need to adjust existing members either. 423 * Also, -a, -b and -i are ignored in this mode. New members are 424 * always inserted at tail. 425 */ 426 if (mode == 'q') 427 goto new_archive; 428 429 /* 430 * Mode 'A' adds the contents of another archive to the tail of 431 * current archive. Note that mode 'A' is a special mode for the 432 * ADDLIB command of the ar script mode. Currently there is no 433 * access to this function from the ar command line mode. 434 */ 435 if (mode == 'A') { 436 /* 437 * Read objects from the target archive of ADDLIB command. 438 * If there are members specified in argv, read those members 439 * only, otherwise the entire archive will be read. 440 */ 441 read_objs(bsdar, bsdar->addlib, 1); 442 goto write_objs; 443 } 444 445 /* 446 * Try to find the position member specified by user. 447 */ 448 if (bsdar->options & AR_A || bsdar->options & AR_B) { 449 TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 450 if (strcmp(obj->name, bsdar->posarg) == 0) { 451 pos = obj; 452 break; 453 } 454 } 455 456 /* 457 * If can't find `pos' specified by user, 458 * silently insert objects at tail. 459 */ 460 if (pos == NULL) 461 bsdar->options &= ~(AR_A | AR_B); 462 } 463 464 for (i = 0; i < bsdar->argc; i++) { 465 av = &bsdar->argv[i]; 466 467 TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 468 if ((bname = basename(*av)) == NULL) 469 bsdar_errc(bsdar, EX_SOFTWARE, errno, 470 "basename failed"); 471 if (bsdar->options & AR_TR) { 472 if (strncmp(bname, obj->name, _TRUNCATE_LEN)) 473 continue; 474 } else 475 if (strcmp(bname, obj->name) != 0) 476 continue; 477 478 if (mode == 'r') { 479 /* 480 * if the new member is not qualified 481 * to replace the old one, skip it. 482 */ 483 nobj = create_obj_from_file(bsdar, *av, 484 obj->mtime); 485 if (nobj == NULL) 486 goto skip_obj; 487 } 488 489 if (bsdar->options & AR_V) 490 (void)fprintf(stdout, "%c - %s\n", mode, 491 *av); 492 493 TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 494 if (mode == 'd' || mode == 'r') 495 free_obj(bsdar, obj); 496 497 if (mode == 'm') 498 insert_obj(bsdar, obj, pos); 499 if (mode == 'r') 500 insert_obj(bsdar, nobj, pos); 501 502 skip_obj: 503 *av = NULL; 504 break; 505 } 506 507 } 508 509 new_archive: 510 /* 511 * When operating in mode 'r', directly add those user specified 512 * objects which do not exist in current archive. When operating 513 * in mode 'q', all objects specified in command line args are 514 * appended to the archive, without comparing with existing ones. 515 */ 516 for (i = 0; i < bsdar->argc; i++) { 517 av = &bsdar->argv[i]; 518 if (*av != NULL && (mode == 'r' || mode == 'q')) { 519 nobj = create_obj_from_file(bsdar, *av, 0); 520 if (nobj != NULL) 521 insert_obj(bsdar, nobj, pos); 522 if (bsdar->options & AR_V && nobj != NULL) 523 (void)fprintf(stdout, "a - %s\n", *av); 524 *av = NULL; 525 } 526 } 527 528 write_objs: 529 write_objs(bsdar); 530 write_cleanup(bsdar); 531 } 532 533 /* 534 * Memory cleaning up. 535 */ 536 static void 537 write_cleanup(struct bsdar *bsdar) 538 { 539 struct ar_obj *obj, *obj_temp; 540 541 TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 542 TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 543 free_obj(bsdar, obj); 544 } 545 546 free(bsdar->as); 547 free(bsdar->s_so); 548 free(bsdar->s_sn); 549 bsdar->as = NULL; 550 bsdar->s_so = NULL; 551 bsdar->s_sn = NULL; 552 } 553 554 /* 555 * Wrapper for archive_write_data(). 556 */ 557 static void 558 write_data(struct bsdar *bsdar, struct archive *a, const void *buf, size_t s) 559 { 560 if (archive_write_data(a, buf, s) != (ssize_t)s) 561 bsdar_errc(bsdar, EX_SOFTWARE, 0, "%s", 562 archive_error_string(a)); 563 } 564 565 /* 566 * Write the resulting archive members. 567 */ 568 static void 569 write_objs(struct bsdar *bsdar) 570 { 571 struct ar_obj *obj; 572 struct archive *a; 573 struct archive_entry *entry; 574 size_t s_sz; /* size of archive symbol table. */ 575 size_t pm_sz; /* size of pseudo members */ 576 int i, nr; 577 578 if (elf_version(EV_CURRENT) == EV_NONE) 579 bsdar_errc(bsdar, EX_SOFTWARE, 0, 580 "ELF library initialization failed: %s", elf_errmsg(-1)); 581 582 bsdar->rela_off = 0; 583 584 /* Create archive symbol table and archive string table, if need. */ 585 TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 586 if (!(bsdar->options & AR_SS) && obj->maddr != NULL) 587 create_symtab_entry(bsdar, obj->maddr, obj->size); 588 if (strlen(obj->name) > _MAXNAMELEN_SVR4) 589 add_to_ar_str_table(bsdar, obj->name); 590 bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2; 591 } 592 593 /* 594 * Pad the symbol name string table. It is treated specially because 595 * symbol name table should be padded by a '\0', not the common '\n' 596 * for other members. The size of sn table includes the pad bit. 597 */ 598 if (bsdar->s_cnt != 0 && bsdar->s_sn_sz % 2 != 0) 599 bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 600 601 /* 602 * Archive string table is padded by a "\n" as the normal members. 603 * The difference is that the size of archive string table counts 604 * in the pad bit, while normal members' size fileds do not. 605 */ 606 if (bsdar->as != NULL && bsdar->as_sz % 2 != 0) 607 bsdar->as[bsdar->as_sz++] = '\n'; 608 609 /* 610 * If there is a symbol table, calculate the size of pseudo members, 611 * convert previously stored relative offsets to absolute ones, and 612 * then make them Big Endian. 613 * 614 * absolute_offset = htobe32(relative_offset + size_of_pseudo_members) 615 */ 616 617 if (bsdar->s_cnt != 0) { 618 s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz; 619 pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz); 620 if (bsdar->as != NULL) 621 pm_sz += _ARHDR_LEN + bsdar->as_sz; 622 for (i = 0; (size_t)i < bsdar->s_cnt; i++) 623 *(bsdar->s_so + i) = htobe32(*(bsdar->s_so + i) + 624 pm_sz); 625 } 626 627 if ((a = archive_write_new()) == NULL) 628 bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_write_new failed"); 629 630 archive_write_set_format_ar_svr4(a); 631 archive_write_set_compression_none(a); 632 633 AC(archive_write_open_filename(a, bsdar->filename)); 634 635 /* 636 * write the archive symbol table, if there is one. 637 * If options -s is explicitly specified or we are invoked 638 * as ranlib, write the symbol table even if it is empty. 639 */ 640 if ((bsdar->s_cnt != 0 && !(bsdar->options & AR_SS)) || 641 bsdar->options & AR_S) { 642 entry = archive_entry_new(); 643 archive_entry_copy_pathname(entry, "/"); 644 if ((bsdar->options & AR_D) == 0) 645 archive_entry_set_mtime(entry, time(NULL), 0); 646 archive_entry_set_size(entry, (bsdar->s_cnt + 1) * 647 sizeof(uint32_t) + bsdar->s_sn_sz); 648 AC(archive_write_header(a, entry)); 649 nr = htobe32(bsdar->s_cnt); 650 write_data(bsdar, a, &nr, sizeof(uint32_t)); 651 write_data(bsdar, a, bsdar->s_so, sizeof(uint32_t) * 652 bsdar->s_cnt); 653 write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz); 654 archive_entry_free(entry); 655 } 656 657 /* write the archive string table, if any. */ 658 if (bsdar->as != NULL) { 659 entry = archive_entry_new(); 660 archive_entry_copy_pathname(entry, "//"); 661 archive_entry_set_size(entry, bsdar->as_sz); 662 AC(archive_write_header(a, entry)); 663 write_data(bsdar, a, bsdar->as, bsdar->as_sz); 664 archive_entry_free(entry); 665 } 666 667 /* write normal members. */ 668 TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 669 entry = archive_entry_new(); 670 archive_entry_copy_pathname(entry, obj->name); 671 archive_entry_set_uid(entry, obj->uid); 672 archive_entry_set_gid(entry, obj->gid); 673 archive_entry_set_mode(entry, obj->md); 674 archive_entry_set_size(entry, obj->size); 675 archive_entry_set_mtime(entry, obj->mtime, 0); 676 archive_entry_set_dev(entry, obj->dev); 677 archive_entry_set_ino(entry, obj->ino); 678 archive_entry_set_filetype(entry, AE_IFREG); 679 AC(archive_write_header(a, entry)); 680 write_data(bsdar, a, obj->maddr, obj->size); 681 archive_entry_free(entry); 682 } 683 684 AC(archive_write_close(a)); 685 AC(archive_write_finish(a)); 686 } 687 688 /* 689 * Extract global symbols from ELF binary members. 690 */ 691 static void 692 create_symtab_entry(struct bsdar *bsdar, void *maddr, size_t size) 693 { 694 Elf *e; 695 Elf_Scn *scn; 696 GElf_Shdr shdr; 697 GElf_Sym sym; 698 Elf_Data *data; 699 char *name; 700 size_t n, shstrndx; 701 int elferr, tabndx, len, i; 702 703 if ((e = elf_memory(maddr, size)) == NULL) { 704 bsdar_warnc(bsdar, 0, "elf_memory() failed: %s", 705 elf_errmsg(-1)); 706 return; 707 } 708 if (elf_kind(e) != ELF_K_ELF) { 709 /* Silently ignore non-elf member. */ 710 elf_end(e); 711 return; 712 } 713 if (elf_getshstrndx(e, &shstrndx) == 0) { 714 bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_getshstrndx failed: %s", 715 elf_errmsg(-1)); 716 elf_end(e); 717 return; 718 } 719 720 tabndx = -1; 721 scn = NULL; 722 while ((scn = elf_nextscn(e, scn)) != NULL) { 723 if (gelf_getshdr(scn, &shdr) != &shdr) { 724 bsdar_warnc(bsdar, 0, 725 "elf_getshdr failed: %s", elf_errmsg(-1)); 726 continue; 727 } 728 if ((name = elf_strptr(e, shstrndx, shdr.sh_name)) == NULL) { 729 bsdar_warnc(bsdar, 0, 730 "elf_strptr failed: %s", elf_errmsg(-1)); 731 continue; 732 } 733 if (strcmp(name, ".strtab") == 0) { 734 tabndx = elf_ndxscn(scn); 735 break; 736 } 737 } 738 elferr = elf_errno(); 739 if (elferr != 0) 740 bsdar_warnc(bsdar, 0, "elf_nextscn failed: %s", 741 elf_errmsg(elferr)); 742 if (tabndx == -1) { 743 bsdar_warnc(bsdar, 0, "can't find .strtab section"); 744 elf_end(e); 745 return; 746 } 747 748 scn = NULL; 749 while ((scn = elf_nextscn(e, scn)) != NULL) { 750 if (gelf_getshdr(scn, &shdr) != &shdr) { 751 bsdar_warnc(bsdar, EX_SOFTWARE, 0, 752 "elf_getshdr failed: %s", elf_errmsg(-1)); 753 continue; 754 } 755 if (shdr.sh_type != SHT_SYMTAB) 756 continue; 757 758 data = NULL; 759 n = 0; 760 while (n < shdr.sh_size && 761 (data = elf_getdata(scn, data)) != NULL) { 762 len = data->d_size / shdr.sh_entsize; 763 for (i = 0; i < len; i++) { 764 if (gelf_getsym(data, i, &sym) != &sym) { 765 bsdar_warnc(bsdar, EX_SOFTWARE, 0, 766 "gelf_getsym failed: %s", 767 elf_errmsg(-1)); 768 continue; 769 } 770 771 /* keep only global or weak symbols */ 772 if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL && 773 GELF_ST_BIND(sym.st_info) != STB_WEAK) 774 continue; 775 776 /* keep only defined symbols */ 777 if (sym.st_shndx == SHN_UNDEF) 778 continue; 779 780 if ((name = elf_strptr(e, tabndx, 781 sym.st_name)) == NULL) { 782 bsdar_warnc(bsdar, EX_SOFTWARE, 0, 783 "elf_strptr failed: %s", 784 elf_errmsg(-1)); 785 continue; 786 } 787 788 add_to_ar_sym_table(bsdar, name); 789 } 790 } 791 } 792 elferr = elf_errno(); 793 if (elferr != 0) 794 bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_nextscn failed: %s", 795 elf_errmsg(elferr)); 796 797 elf_end(e); 798 } 799 800 /* 801 * Append to the archive string table buffer. 802 */ 803 static void 804 add_to_ar_str_table(struct bsdar *bsdar, const char *name) 805 { 806 807 if (bsdar->as == NULL) { 808 bsdar->as_cap = _INIT_AS_CAP; 809 bsdar->as_sz = 0; 810 if ((bsdar->as = malloc(bsdar->as_cap)) == NULL) 811 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 812 } 813 814 /* 815 * The space required for holding one member name in as table includes: 816 * strlen(name) + (1 for '/') + (1 for '\n') + (possibly 1 for padding). 817 */ 818 while (bsdar->as_sz + strlen(name) + 3 > bsdar->as_cap) { 819 bsdar->as_cap *= 2; 820 bsdar->as = realloc(bsdar->as, bsdar->as_cap); 821 if (bsdar->as == NULL) 822 bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 823 } 824 strncpy(&bsdar->as[bsdar->as_sz], name, strlen(name)); 825 bsdar->as_sz += strlen(name); 826 bsdar->as[bsdar->as_sz++] = '/'; 827 bsdar->as[bsdar->as_sz++] = '\n'; 828 } 829 830 /* 831 * Append to the archive symbol table buffer. 832 */ 833 static void 834 add_to_ar_sym_table(struct bsdar *bsdar, const char *name) 835 { 836 837 if (bsdar->s_so == NULL) { 838 if ((bsdar->s_so = malloc(_INIT_SYMOFF_CAP)) == 839 NULL) 840 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 841 bsdar->s_so_cap = _INIT_SYMOFF_CAP; 842 bsdar->s_cnt = 0; 843 } 844 845 if (bsdar->s_sn == NULL) { 846 if ((bsdar->s_sn = malloc(_INIT_SYMNAME_CAP)) == NULL) 847 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 848 bsdar->s_sn_cap = _INIT_SYMNAME_CAP; 849 bsdar->s_sn_sz = 0; 850 } 851 852 if (bsdar->s_cnt * sizeof(uint32_t) >= bsdar->s_so_cap) { 853 bsdar->s_so_cap *= 2; 854 bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap); 855 if (bsdar->s_so == NULL) 856 bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 857 } 858 bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off; 859 bsdar->s_cnt++; 860 861 /* 862 * The space required for holding one symbol name in sn table includes: 863 * strlen(name) + (1 for '\n') + (possibly 1 for padding). 864 */ 865 while (bsdar->s_sn_sz + strlen(name) + 2 > bsdar->s_sn_cap) { 866 bsdar->s_sn_cap *= 2; 867 bsdar->s_sn = realloc(bsdar->s_sn, bsdar->s_sn_cap); 868 if (bsdar->s_sn == NULL) 869 bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 870 } 871 strncpy(&bsdar->s_sn[bsdar->s_sn_sz], name, strlen(name)); 872 bsdar->s_sn_sz += strlen(name); 873 bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 874 } 875