1 /*- 2 * Copyright (c) 2003-2007 Tim Kientzle 3 * Copyright (c) 2011-2012 Michihiro NAKAJIMA 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 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 "archive_platform.h" 28 29 #ifdef HAVE_ERRNO_H 30 #include <errno.h> 31 #endif 32 #include <stdio.h> 33 #ifdef HAVE_STDLIB_H 34 #include <stdlib.h> 35 #endif 36 #ifdef HAVE_STRING_H 37 #include <string.h> 38 #endif 39 40 #include "archive.h" 41 #include "archive_entry.h" 42 #include "archive_entry_locale.h" 43 #include "archive_private.h" 44 #include "archive_write_private.h" 45 #include "archive_write_set_format_private.h" 46 47 struct ustar { 48 uint64_t entry_bytes_remaining; 49 uint64_t entry_padding; 50 51 struct archive_string_conv *opt_sconv; 52 struct archive_string_conv *sconv_default; 53 int init_default_conversion; 54 }; 55 56 /* 57 * Define structure of POSIX 'ustar' tar header. 58 */ 59 #define USTAR_name_offset 0 60 #define USTAR_name_size 100 61 #define USTAR_mode_offset 100 62 #define USTAR_mode_size 6 63 #define USTAR_mode_max_size 8 64 #define USTAR_uid_offset 108 65 #define USTAR_uid_size 6 66 #define USTAR_uid_max_size 8 67 #define USTAR_gid_offset 116 68 #define USTAR_gid_size 6 69 #define USTAR_gid_max_size 8 70 #define USTAR_size_offset 124 71 #define USTAR_size_size 11 72 #define USTAR_size_max_size 12 73 #define USTAR_mtime_offset 136 74 #define USTAR_mtime_size 11 75 #define USTAR_mtime_max_size 11 76 #define USTAR_checksum_offset 148 77 #define USTAR_checksum_size 8 78 #define USTAR_typeflag_offset 156 79 #define USTAR_typeflag_size 1 80 #define USTAR_linkname_offset 157 81 #define USTAR_linkname_size 100 82 #define USTAR_magic_offset 257 83 #define USTAR_magic_size 6 84 #define USTAR_version_offset 263 85 #define USTAR_version_size 2 86 #define USTAR_uname_offset 265 87 #define USTAR_uname_size 32 88 #define USTAR_gname_offset 297 89 #define USTAR_gname_size 32 90 #define USTAR_rdevmajor_offset 329 91 #define USTAR_rdevmajor_size 6 92 #define USTAR_rdevmajor_max_size 8 93 #define USTAR_rdevminor_offset 337 94 #define USTAR_rdevminor_size 6 95 #define USTAR_rdevminor_max_size 8 96 #define USTAR_prefix_offset 345 97 #define USTAR_prefix_size 155 98 #define USTAR_padding_offset 500 99 #define USTAR_padding_size 12 100 101 /* 102 * A filled-in copy of the header for initialization. 103 */ 104 static const char template_header[] = { 105 /* name: 100 bytes */ 106 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 107 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 108 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 109 0,0,0,0, 110 /* Mode, space-null termination: 8 bytes */ 111 '0','0','0','0','0','0', ' ','\0', 112 /* uid, space-null termination: 8 bytes */ 113 '0','0','0','0','0','0', ' ','\0', 114 /* gid, space-null termination: 8 bytes */ 115 '0','0','0','0','0','0', ' ','\0', 116 /* size, space termination: 12 bytes */ 117 '0','0','0','0','0','0','0','0','0','0','0', ' ', 118 /* mtime, space termination: 12 bytes */ 119 '0','0','0','0','0','0','0','0','0','0','0', ' ', 120 /* Initial checksum value: 8 spaces */ 121 ' ',' ',' ',' ',' ',' ',' ',' ', 122 /* Typeflag: 1 byte */ 123 '0', /* '0' = regular file */ 124 /* Linkname: 100 bytes */ 125 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 126 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 127 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 128 0,0,0,0, 129 /* Magic: 6 bytes, Version: 2 bytes */ 130 'u','s','t','a','r','\0', '0','0', 131 /* Uname: 32 bytes */ 132 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 133 /* Gname: 32 bytes */ 134 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 135 /* rdevmajor + space/null padding: 8 bytes */ 136 '0','0','0','0','0','0', ' ','\0', 137 /* rdevminor + space/null padding: 8 bytes */ 138 '0','0','0','0','0','0', ' ','\0', 139 /* Prefix: 155 bytes */ 140 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 141 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 142 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 143 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 144 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0, 145 /* Padding: 12 bytes */ 146 0,0,0,0,0,0,0,0, 0,0,0,0 147 }; 148 149 static ssize_t archive_write_ustar_data(struct archive_write *a, const void *buff, 150 size_t s); 151 static int archive_write_ustar_free(struct archive_write *); 152 static int archive_write_ustar_close(struct archive_write *); 153 static int archive_write_ustar_finish_entry(struct archive_write *); 154 static int archive_write_ustar_header(struct archive_write *, 155 struct archive_entry *entry); 156 static int archive_write_ustar_options(struct archive_write *, 157 const char *, const char *); 158 static int format_256(int64_t, char *, int); 159 static int format_number(int64_t, char *, int size, int max, int strict); 160 static int format_octal(int64_t, char *, int); 161 162 /* 163 * Set output format to 'ustar' format. 164 */ 165 int 166 archive_write_set_format_ustar(struct archive *_a) 167 { 168 struct archive_write *a = (struct archive_write *)_a; 169 struct ustar *ustar; 170 171 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 172 ARCHIVE_STATE_NEW, "archive_write_set_format_ustar"); 173 174 /* If someone else was already registered, unregister them. */ 175 if (a->format_free != NULL) 176 (a->format_free)(a); 177 178 /* Basic internal sanity test. */ 179 if (sizeof(template_header) != 512) { 180 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 181 "Internal: template_header wrong size: %zu should be 512", 182 sizeof(template_header)); 183 return (ARCHIVE_FATAL); 184 } 185 186 ustar = calloc(1, sizeof(*ustar)); 187 if (ustar == NULL) { 188 archive_set_error(&a->archive, ENOMEM, 189 "Can't allocate ustar data"); 190 return (ARCHIVE_FATAL); 191 } 192 a->format_data = ustar; 193 a->format_name = "ustar"; 194 a->format_options = archive_write_ustar_options; 195 a->format_write_header = archive_write_ustar_header; 196 a->format_write_data = archive_write_ustar_data; 197 a->format_close = archive_write_ustar_close; 198 a->format_free = archive_write_ustar_free; 199 a->format_finish_entry = archive_write_ustar_finish_entry; 200 a->archive.archive_format = ARCHIVE_FORMAT_TAR_USTAR; 201 a->archive.archive_format_name = "POSIX ustar"; 202 return (ARCHIVE_OK); 203 } 204 205 static int 206 archive_write_ustar_options(struct archive_write *a, const char *key, 207 const char *val) 208 { 209 struct ustar *ustar = (struct ustar *)a->format_data; 210 int ret = ARCHIVE_FAILED; 211 212 if (strcmp(key, "hdrcharset") == 0) { 213 if (val == NULL || val[0] == 0) 214 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 215 "%s: hdrcharset option needs a character-set name", 216 a->format_name); 217 else { 218 ustar->opt_sconv = archive_string_conversion_to_charset( 219 &a->archive, val, 0); 220 if (ustar->opt_sconv != NULL) 221 ret = ARCHIVE_OK; 222 else 223 ret = ARCHIVE_FATAL; 224 } 225 return (ret); 226 } 227 228 /* Note: The "warn" return is just to inform the options 229 * supervisor that we didn't handle it. It will generate 230 * a suitable error if no one used this option. */ 231 return (ARCHIVE_WARN); 232 } 233 234 static int 235 archive_write_ustar_header(struct archive_write *a, struct archive_entry *entry) 236 { 237 char buff[512]; 238 int ret, ret2; 239 struct ustar *ustar; 240 struct archive_entry *entry_main; 241 struct archive_string_conv *sconv; 242 243 ustar = (struct ustar *)a->format_data; 244 245 /* Setup default string conversion. */ 246 if (ustar->opt_sconv == NULL) { 247 if (!ustar->init_default_conversion) { 248 ustar->sconv_default = 249 archive_string_default_conversion_for_write(&(a->archive)); 250 ustar->init_default_conversion = 1; 251 } 252 sconv = ustar->sconv_default; 253 } else 254 sconv = ustar->opt_sconv; 255 256 /* Sanity check. */ 257 if (archive_entry_pathname(entry) == NULL 258 #if defined(_WIN32) && !defined(__CYGWIN__) 259 && archive_entry_pathname_w(entry) == NULL 260 #endif 261 ) { 262 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 263 "Can't record entry in tar file without pathname"); 264 return (ARCHIVE_FAILED); 265 } 266 267 /* Only regular files (not hardlinks) have data. */ 268 if (archive_entry_hardlink(entry) != NULL || 269 archive_entry_symlink(entry) != NULL || 270 archive_entry_filetype(entry) != AE_IFREG) 271 archive_entry_set_size(entry, 0); 272 273 if (AE_IFDIR == archive_entry_filetype(entry)) { 274 const char *p; 275 size_t path_length; 276 /* 277 * Ensure a trailing '/'. Modify the entry so 278 * the client sees the change. 279 */ 280 #if defined(_WIN32) && !defined(__CYGWIN__) 281 const wchar_t *wp; 282 283 wp = archive_entry_pathname_w(entry); 284 if (wp != NULL && wp[wcslen(wp) -1] != L'/') { 285 struct archive_wstring ws; 286 287 archive_string_init(&ws); 288 path_length = wcslen(wp); 289 if (archive_wstring_ensure(&ws, 290 path_length + 2) == NULL) { 291 archive_set_error(&a->archive, ENOMEM, 292 "Can't allocate ustar data"); 293 archive_wstring_free(&ws); 294 return(ARCHIVE_FATAL); 295 } 296 /* Should we keep '\' ? */ 297 if (wp[path_length -1] == L'\\') 298 path_length--; 299 archive_wstrncpy(&ws, wp, path_length); 300 archive_wstrappend_wchar(&ws, L'/'); 301 archive_entry_copy_pathname_w(entry, ws.s); 302 archive_wstring_free(&ws); 303 p = NULL; 304 } else 305 #endif 306 p = archive_entry_pathname(entry); 307 /* 308 * On Windows, this is a backup operation just in 309 * case getting WCS failed. On POSIX, this is a 310 * normal operation. 311 */ 312 if (p != NULL && p[0] != '\0' && p[strlen(p) - 1] != '/') { 313 struct archive_string as; 314 315 archive_string_init(&as); 316 path_length = strlen(p); 317 if (archive_string_ensure(&as, 318 path_length + 2) == NULL) { 319 archive_set_error(&a->archive, ENOMEM, 320 "Can't allocate ustar data"); 321 archive_string_free(&as); 322 return(ARCHIVE_FATAL); 323 } 324 #if defined(_WIN32) && !defined(__CYGWIN__) 325 /* NOTE: This might break the pathname 326 * if the current code page is CP932 and 327 * the pathname includes a character '\' 328 * as a part of its multibyte pathname. */ 329 if (p[strlen(p) -1] == '\\') 330 path_length--; 331 else 332 #endif 333 archive_strncpy(&as, p, path_length); 334 archive_strappend_char(&as, '/'); 335 archive_entry_copy_pathname(entry, as.s); 336 archive_string_free(&as); 337 } 338 } 339 340 #if defined(_WIN32) && !defined(__CYGWIN__) 341 /* Make sure the path separators in pathname, hardlink and symlink 342 * are all slash '/', not the Windows path separator '\'. */ 343 entry_main = __la_win_entry_in_posix_pathseparator(entry); 344 if (entry_main == NULL) { 345 archive_set_error(&a->archive, ENOMEM, 346 "Can't allocate ustar data"); 347 return(ARCHIVE_FATAL); 348 } 349 if (entry != entry_main) 350 entry = entry_main; 351 else 352 entry_main = NULL; 353 #else 354 entry_main = NULL; 355 #endif 356 ret = __archive_write_format_header_ustar(a, buff, entry, -1, 1, sconv); 357 if (ret < ARCHIVE_WARN) { 358 archive_entry_free(entry_main); 359 return (ret); 360 } 361 ret2 = __archive_write_output(a, buff, 512); 362 if (ret2 < ARCHIVE_WARN) { 363 archive_entry_free(entry_main); 364 return (ret2); 365 } 366 if (ret2 < ret) 367 ret = ret2; 368 369 ustar->entry_bytes_remaining = archive_entry_size(entry); 370 ustar->entry_padding = 0x1ff & (-(int64_t)ustar->entry_bytes_remaining); 371 archive_entry_free(entry_main); 372 return (ret); 373 } 374 375 /* 376 * Format a basic 512-byte "ustar" header. 377 * 378 * Returns -1 if format failed (due to field overflow). 379 * Note that this always formats as much of the header as possible. 380 * If "strict" is set to zero, it will extend numeric fields as 381 * necessary (overwriting terminators or using base-256 extensions). 382 * 383 * This is exported so that other 'tar' formats can use it. 384 */ 385 int 386 __archive_write_format_header_ustar(struct archive_write *a, char h[512], 387 struct archive_entry *entry, int tartype, int strict, 388 struct archive_string_conv *sconv) 389 { 390 unsigned int checksum; 391 int i, r, ret; 392 size_t copy_length; 393 const char *p, *pp; 394 int mytartype; 395 396 ret = 0; 397 mytartype = -1; 398 /* 399 * The "template header" already includes the "ustar" 400 * signature, various end-of-field markers and other required 401 * elements. 402 */ 403 memcpy(h, &template_header, 512); 404 405 /* 406 * Because the block is already null-filled, and strings 407 * are allowed to exactly fill their destination (without null), 408 * I use memcpy(dest, src, strlen()) here a lot to copy strings. 409 */ 410 r = archive_entry_pathname_l(entry, &pp, ©_length, sconv); 411 if (r != 0) { 412 const char* p_mbs; 413 if (errno == ENOMEM) { 414 archive_set_error(&a->archive, ENOMEM, 415 "Can't allocate memory for Pathname"); 416 return (ARCHIVE_FATAL); 417 } 418 p_mbs = archive_entry_pathname(entry); 419 if (p_mbs) { 420 /* We have a wrongly-encoded MBS pathname. 421 * Warn and use it. */ 422 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 423 "Can't translate pathname '%s' to %s", p_mbs, 424 archive_string_conversion_charset_name(sconv)); 425 ret = ARCHIVE_WARN; 426 } else { 427 /* We have no MBS pathname. Fail. */ 428 archive_set_error(&a->archive, 429 ARCHIVE_ERRNO_FILE_FORMAT, 430 "Can't translate pathname to %s", 431 archive_string_conversion_charset_name(sconv)); 432 return ARCHIVE_FAILED; 433 } 434 } 435 if (copy_length <= USTAR_name_size) 436 memcpy(h + USTAR_name_offset, pp, copy_length); 437 else { 438 /* Store in two pieces, splitting at a '/'. */ 439 p = strchr(pp + copy_length - USTAR_name_size - 1, '/'); 440 /* 441 * Look for the next '/' if we chose the first character 442 * as the separator. (ustar format doesn't permit 443 * an empty prefix.) 444 */ 445 if (p == pp) 446 p = strchr(p + 1, '/'); 447 /* Fail if the name won't fit. */ 448 if (!p) { 449 /* No separator. */ 450 archive_set_error(&a->archive, ENAMETOOLONG, 451 "Pathname too long"); 452 ret = ARCHIVE_FAILED; 453 } else if (p[1] == '\0') { 454 /* 455 * The only feasible separator is a final '/'; 456 * this would result in a non-empty prefix and 457 * an empty name, which POSIX doesn't 458 * explicitly forbid, but it just feels wrong. 459 */ 460 archive_set_error(&a->archive, ENAMETOOLONG, 461 "Pathname too long"); 462 ret = ARCHIVE_FAILED; 463 } else if (p > pp + USTAR_prefix_size) { 464 /* Prefix is too long. */ 465 archive_set_error(&a->archive, ENAMETOOLONG, 466 "Pathname too long"); 467 ret = ARCHIVE_FAILED; 468 } else { 469 /* Copy prefix and remainder to appropriate places */ 470 memcpy(h + USTAR_prefix_offset, pp, p - pp); 471 memcpy(h + USTAR_name_offset, p + 1, 472 pp + copy_length - p - 1); 473 } 474 } 475 476 r = archive_entry_hardlink_l(entry, &p, ©_length, sconv); 477 if (r != 0) { 478 if (errno == ENOMEM) { 479 archive_set_error(&a->archive, ENOMEM, 480 "Can't allocate memory for Linkname"); 481 return (ARCHIVE_FATAL); 482 } 483 archive_set_error(&a->archive, 484 ARCHIVE_ERRNO_FILE_FORMAT, 485 "Can't translate linkname '%s' to %s", 486 p, archive_string_conversion_charset_name(sconv)); 487 ret = ARCHIVE_WARN; 488 } 489 if (copy_length > 0) 490 mytartype = '1'; 491 else { 492 r = archive_entry_symlink_l(entry, &p, ©_length, sconv); 493 if (r != 0) { 494 if (errno == ENOMEM) { 495 archive_set_error(&a->archive, ENOMEM, 496 "Can't allocate memory for Linkname"); 497 return (ARCHIVE_FATAL); 498 } 499 archive_set_error(&a->archive, 500 ARCHIVE_ERRNO_FILE_FORMAT, 501 "Can't translate linkname '%s' to %s", 502 p, archive_string_conversion_charset_name(sconv)); 503 ret = ARCHIVE_WARN; 504 } 505 } 506 if (copy_length > 0) { 507 if (copy_length > USTAR_linkname_size) { 508 archive_set_error(&a->archive, ENAMETOOLONG, 509 "Link contents too long"); 510 ret = ARCHIVE_FAILED; 511 copy_length = USTAR_linkname_size; 512 } 513 memcpy(h + USTAR_linkname_offset, p, copy_length); 514 } 515 516 r = archive_entry_uname_l(entry, &p, ©_length, sconv); 517 if (r != 0) { 518 if (errno == ENOMEM) { 519 archive_set_error(&a->archive, ENOMEM, 520 "Can't allocate memory for Uname"); 521 return (ARCHIVE_FATAL); 522 } 523 archive_set_error(&a->archive, 524 ARCHIVE_ERRNO_FILE_FORMAT, 525 "Can't translate uname '%s' to %s", 526 p, archive_string_conversion_charset_name(sconv)); 527 ret = ARCHIVE_WARN; 528 } 529 if (copy_length > 0) { 530 if (copy_length > USTAR_uname_size) { 531 if (tartype != 'x') { 532 archive_set_error(&a->archive, 533 ARCHIVE_ERRNO_MISC, "Username too long"); 534 ret = ARCHIVE_FAILED; 535 } 536 copy_length = USTAR_uname_size; 537 } 538 memcpy(h + USTAR_uname_offset, p, copy_length); 539 } 540 541 r = archive_entry_gname_l(entry, &p, ©_length, sconv); 542 if (r != 0) { 543 if (errno == ENOMEM) { 544 archive_set_error(&a->archive, ENOMEM, 545 "Can't allocate memory for Gname"); 546 return (ARCHIVE_FATAL); 547 } 548 archive_set_error(&a->archive, 549 ARCHIVE_ERRNO_FILE_FORMAT, 550 "Can't translate gname '%s' to %s", 551 p, archive_string_conversion_charset_name(sconv)); 552 ret = ARCHIVE_WARN; 553 } 554 if (copy_length > 0) { 555 if (copy_length > USTAR_gname_size) { 556 if (tartype != 'x') { 557 archive_set_error(&a->archive, 558 ARCHIVE_ERRNO_MISC, "Group name too long"); 559 ret = ARCHIVE_FAILED; 560 } 561 copy_length = USTAR_gname_size; 562 } 563 memcpy(h + USTAR_gname_offset, p, copy_length); 564 } 565 566 if (format_number(archive_entry_mode(entry) & 07777, 567 h + USTAR_mode_offset, USTAR_mode_size, USTAR_mode_max_size, strict)) { 568 archive_set_error(&a->archive, ERANGE, 569 "Numeric mode too large"); 570 ret = ARCHIVE_FAILED; 571 } 572 573 if (format_number(archive_entry_uid(entry), 574 h + USTAR_uid_offset, USTAR_uid_size, USTAR_uid_max_size, strict)) { 575 archive_set_error(&a->archive, ERANGE, 576 "Numeric user ID too large"); 577 ret = ARCHIVE_FAILED; 578 } 579 580 if (format_number(archive_entry_gid(entry), 581 h + USTAR_gid_offset, USTAR_gid_size, USTAR_gid_max_size, strict)) { 582 archive_set_error(&a->archive, ERANGE, 583 "Numeric group ID too large"); 584 ret = ARCHIVE_FAILED; 585 } 586 587 if (format_number(archive_entry_size(entry), 588 h + USTAR_size_offset, USTAR_size_size, USTAR_size_max_size, strict)) { 589 archive_set_error(&a->archive, ERANGE, 590 "File size out of range"); 591 ret = ARCHIVE_FAILED; 592 } 593 594 if (format_number(archive_entry_mtime(entry), 595 h + USTAR_mtime_offset, USTAR_mtime_size, USTAR_mtime_max_size, strict)) { 596 archive_set_error(&a->archive, ERANGE, 597 "File modification time too large"); 598 ret = ARCHIVE_FAILED; 599 } 600 601 if (archive_entry_filetype(entry) == AE_IFBLK 602 || archive_entry_filetype(entry) == AE_IFCHR) { 603 if (format_number(archive_entry_rdevmajor(entry), 604 h + USTAR_rdevmajor_offset, USTAR_rdevmajor_size, 605 USTAR_rdevmajor_max_size, strict)) { 606 archive_set_error(&a->archive, ERANGE, 607 "Major device number too large"); 608 ret = ARCHIVE_FAILED; 609 } 610 611 if (format_number(archive_entry_rdevminor(entry), 612 h + USTAR_rdevminor_offset, USTAR_rdevminor_size, 613 USTAR_rdevminor_max_size, strict)) { 614 archive_set_error(&a->archive, ERANGE, 615 "Minor device number too large"); 616 ret = ARCHIVE_FAILED; 617 } 618 } 619 620 if (tartype >= 0) { 621 h[USTAR_typeflag_offset] = tartype; 622 } else if (mytartype >= 0) { 623 h[USTAR_typeflag_offset] = mytartype; 624 } else { 625 switch (archive_entry_filetype(entry)) { 626 case AE_IFREG: h[USTAR_typeflag_offset] = '0' ; break; 627 case AE_IFLNK: h[USTAR_typeflag_offset] = '2' ; break; 628 case AE_IFCHR: h[USTAR_typeflag_offset] = '3' ; break; 629 case AE_IFBLK: h[USTAR_typeflag_offset] = '4' ; break; 630 case AE_IFDIR: h[USTAR_typeflag_offset] = '5' ; break; 631 case AE_IFIFO: h[USTAR_typeflag_offset] = '6' ; break; 632 default: /* AE_IFSOCK and unknown */ 633 __archive_write_entry_filetype_unsupported( 634 &a->archive, entry, "ustar"); 635 ret = ARCHIVE_FAILED; 636 } 637 } 638 639 checksum = 0; 640 for (i = 0; i < 512; i++) 641 checksum += 255 & (unsigned int)h[i]; 642 h[USTAR_checksum_offset + 6] = '\0'; /* Can't be pre-set in the template. */ 643 /* h[USTAR_checksum_offset + 7] = ' '; */ /* This is pre-set in the template. */ 644 format_octal(checksum, h + USTAR_checksum_offset, 6); 645 return (ret); 646 } 647 648 /* 649 * Format a number into a field, with some intelligence. 650 */ 651 static int 652 format_number(int64_t v, char *p, int s, int maxsize, int strict) 653 { 654 int64_t limit; 655 656 limit = ((int64_t)1 << (s*3)); 657 658 /* "Strict" only permits octal values with proper termination. */ 659 if (strict) 660 return (format_octal(v, p, s)); 661 662 /* 663 * In non-strict mode, we allow the number to overwrite one or 664 * more bytes of the field termination. Even old tar 665 * implementations should be able to handle this with no 666 * problem. 667 */ 668 if (v >= 0) { 669 while (s <= maxsize) { 670 if (v < limit) 671 return (format_octal(v, p, s)); 672 s++; 673 limit <<= 3; 674 } 675 } 676 677 /* Base-256 can handle any number, positive or negative. */ 678 return (format_256(v, p, maxsize)); 679 } 680 681 /* 682 * Format a number into the specified field using base-256. 683 */ 684 static int 685 format_256(int64_t v, char *p, int s) 686 { 687 p += s; 688 while (s-- > 0) { 689 *--p = (char)(v & 0xff); 690 v >>= 8; 691 } 692 *p |= 0x80; /* Set the base-256 marker bit. */ 693 return (0); 694 } 695 696 /* 697 * Format a number into the specified field. 698 */ 699 static int 700 format_octal(int64_t v, char *p, int s) 701 { 702 int len; 703 704 len = s; 705 706 /* Octal values can't be negative, so use 0. */ 707 if (v < 0) { 708 while (len-- > 0) 709 *p++ = '0'; 710 return (-1); 711 } 712 713 p += s; /* Start at the end and work backwards. */ 714 while (s-- > 0) { 715 *--p = (char)('0' + (v & 7)); 716 v >>= 3; 717 } 718 719 if (v == 0) 720 return (0); 721 722 /* If it overflowed, fill field with max value. */ 723 while (len-- > 0) 724 *p++ = '7'; 725 726 return (-1); 727 } 728 729 static int 730 archive_write_ustar_close(struct archive_write *a) 731 { 732 return (__archive_write_nulls(a, 512*2)); 733 } 734 735 static int 736 archive_write_ustar_free(struct archive_write *a) 737 { 738 struct ustar *ustar; 739 740 ustar = (struct ustar *)a->format_data; 741 free(ustar); 742 a->format_data = NULL; 743 return (ARCHIVE_OK); 744 } 745 746 static int 747 archive_write_ustar_finish_entry(struct archive_write *a) 748 { 749 struct ustar *ustar; 750 int ret; 751 752 ustar = (struct ustar *)a->format_data; 753 ret = __archive_write_nulls(a, 754 (size_t)(ustar->entry_bytes_remaining + ustar->entry_padding)); 755 ustar->entry_bytes_remaining = ustar->entry_padding = 0; 756 return (ret); 757 } 758 759 static ssize_t 760 archive_write_ustar_data(struct archive_write *a, const void *buff, size_t s) 761 { 762 struct ustar *ustar; 763 int ret; 764 765 ustar = (struct ustar *)a->format_data; 766 if (s > ustar->entry_bytes_remaining) 767 s = (size_t)ustar->entry_bytes_remaining; 768 ret = __archive_write_output(a, buff, s); 769 ustar->entry_bytes_remaining -= s; 770 if (ret != ARCHIVE_OK) 771 return (ret); 772 return (s); 773 } 774
Indexes created Tue Jun 23 00:25:03 UTC 2026