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 __FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_format_ustar.c 191579 2009-04-27 18:35:03Z kientzle $"); 29 30 31 #ifdef HAVE_ERRNO_H 32 #include <errno.h> 33 #endif 34 #include <stdio.h> 35 #ifdef HAVE_STDLIB_H 36 #include <stdlib.h> 37 #endif 38 #ifdef HAVE_STRING_H 39 #include <string.h> 40 #endif 41 42 #include "archive.h" 43 #include "archive_entry.h" 44 #include "archive_entry_locale.h" 45 #include "archive_private.h" 46 #include "archive_write_private.h" 47 48 struct ustar { 49 uint64_t entry_bytes_remaining; 50 uint64_t entry_padding; 51 52 struct archive_string_conv *opt_sconv; 53 struct archive_string_conv *sconv_default; 54 int init_default_conversion; 55 }; 56 57 /* 58 * Define structure of POSIX 'ustar' tar header. 59 */ 60 #define USTAR_name_offset 0 61 #define USTAR_name_size 100 62 #define USTAR_mode_offset 100 63 #define USTAR_mode_size 6 64 #define USTAR_mode_max_size 8 65 #define USTAR_uid_offset 108 66 #define USTAR_uid_size 6 67 #define USTAR_uid_max_size 8 68 #define USTAR_gid_offset 116 69 #define USTAR_gid_size 6 70 #define USTAR_gid_max_size 8 71 #define USTAR_size_offset 124 72 #define USTAR_size_size 11 73 #define USTAR_size_max_size 12 74 #define USTAR_mtime_offset 136 75 #define USTAR_mtime_size 11 76 #define USTAR_mtime_max_size 11 77 #define USTAR_checksum_offset 148 78 #define USTAR_checksum_size 8 79 #define USTAR_typeflag_offset 156 80 #define USTAR_typeflag_size 1 81 #define USTAR_linkname_offset 157 82 #define USTAR_linkname_size 100 83 #define USTAR_magic_offset 257 84 #define USTAR_magic_size 6 85 #define USTAR_version_offset 263 86 #define USTAR_version_size 2 87 #define USTAR_uname_offset 265 88 #define USTAR_uname_size 32 89 #define USTAR_gname_offset 297 90 #define USTAR_gname_size 32 91 #define USTAR_rdevmajor_offset 329 92 #define USTAR_rdevmajor_size 6 93 #define USTAR_rdevmajor_max_size 8 94 #define USTAR_rdevminor_offset 337 95 #define USTAR_rdevminor_size 6 96 #define USTAR_rdevminor_max_size 8 97 #define USTAR_prefix_offset 345 98 #define USTAR_prefix_size 155 99 #define USTAR_padding_offset 500 100 #define USTAR_padding_size 12 101 102 /* 103 * A filled-in copy of the header for initialization. 104 */ 105 static const char template_header[] = { 106 /* name: 100 bytes */ 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 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 110 0,0,0,0, 111 /* Mode, space-null termination: 8 bytes */ 112 '0','0','0','0','0','0', ' ','\0', 113 /* uid, space-null termination: 8 bytes */ 114 '0','0','0','0','0','0', ' ','\0', 115 /* gid, space-null termination: 8 bytes */ 116 '0','0','0','0','0','0', ' ','\0', 117 /* size, space termation: 12 bytes */ 118 '0','0','0','0','0','0','0','0','0','0','0', ' ', 119 /* mtime, space termation: 12 bytes */ 120 '0','0','0','0','0','0','0','0','0','0','0', ' ', 121 /* Initial checksum value: 8 spaces */ 122 ' ',' ',' ',' ',' ',' ',' ',' ', 123 /* Typeflag: 1 byte */ 124 '0', /* '0' = regular file */ 125 /* Linkname: 100 bytes */ 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 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 129 0,0,0,0, 130 /* Magic: 6 bytes, Version: 2 bytes */ 131 'u','s','t','a','r','\0', '0','0', 132 /* Uname: 32 bytes */ 133 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, 134 /* Gname: 32 bytes */ 135 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, 136 /* rdevmajor + space/null padding: 8 bytes */ 137 '0','0','0','0','0','0', ' ','\0', 138 /* rdevminor + space/null padding: 8 bytes */ 139 '0','0','0','0','0','0', ' ','\0', 140 /* Prefix: 155 bytes */ 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, 0,0,0,0,0,0,0,0, 145 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, 146 /* Padding: 12 bytes */ 147 0,0,0,0,0,0,0,0, 0,0,0,0 148 }; 149 150 static ssize_t archive_write_ustar_data(struct archive_write *a, const void *buff, 151 size_t s); 152 static int archive_write_ustar_free(struct archive_write *); 153 static int archive_write_ustar_close(struct archive_write *); 154 static int archive_write_ustar_finish_entry(struct archive_write *); 155 static int archive_write_ustar_header(struct archive_write *, 156 struct archive_entry *entry); 157 static int archive_write_ustar_options(struct archive_write *, 158 const char *, const char *); 159 static int format_256(int64_t, char *, int); 160 static int format_number(int64_t, char *, int size, int max, int strict); 161 static int format_octal(int64_t, char *, int); 162 163 /* 164 * Set output format to 'ustar' format. 165 */ 166 int 167 archive_write_set_format_ustar(struct archive *_a) 168 { 169 struct archive_write *a = (struct archive_write *)_a; 170 struct ustar *ustar; 171 172 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 173 ARCHIVE_STATE_NEW, "archive_write_set_format_ustar"); 174 175 /* If someone else was already registered, unregister them. */ 176 if (a->format_free != NULL) 177 (a->format_free)(a); 178 179 /* Basic internal sanity test. */ 180 if (sizeof(template_header) != 512) { 181 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 182 "Internal: template_header wrong size: %zu should be 512", 183 sizeof(template_header)); 184 return (ARCHIVE_FATAL); 185 } 186 187 ustar = (struct ustar *)malloc(sizeof(*ustar)); 188 if (ustar == NULL) { 189 archive_set_error(&a->archive, ENOMEM, 190 "Can't allocate ustar data"); 191 return (ARCHIVE_FATAL); 192 } 193 memset(ustar, 0, sizeof(*ustar)); 194 a->format_data = ustar; 195 a->format_name = "ustar"; 196 a->format_options = archive_write_ustar_options; 197 a->format_write_header = archive_write_ustar_header; 198 a->format_write_data = archive_write_ustar_data; 199 a->format_close = archive_write_ustar_close; 200 a->format_free = archive_write_ustar_free; 201 a->format_finish_entry = archive_write_ustar_finish_entry; 202 a->archive.archive_format = ARCHIVE_FORMAT_TAR_USTAR; 203 a->archive.archive_format_name = "POSIX ustar"; 204 return (ARCHIVE_OK); 205 } 206 207 static int 208 archive_write_ustar_options(struct archive_write *a, const char *key, 209 const char *val) 210 { 211 struct ustar *ustar = (struct ustar *)a->format_data; 212 int ret = ARCHIVE_FAILED; 213 214 if (strcmp(key, "hdrcharset") == 0) { 215 if (val == NULL || val[0] == 0) 216 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 217 "%s: hdrcharset option needs a character-set name", 218 a->format_name); 219 else { 220 ustar->opt_sconv = archive_string_conversion_to_charset( 221 &a->archive, val, 0); 222 if (ustar->opt_sconv != NULL) 223 ret = ARCHIVE_OK; 224 else 225 ret = ARCHIVE_FATAL; 226 } 227 return (ret); 228 } 229 230 /* Note: The "warn" return is just to inform the options 231 * supervisor that we didn't handle it. It will generate 232 * a suitable error if no one used this option. */ 233 return (ARCHIVE_WARN); 234 } 235 236 static int 237 archive_write_ustar_header(struct archive_write *a, struct archive_entry *entry) 238 { 239 char buff[512]; 240 int ret, ret2; 241 struct ustar *ustar; 242 struct archive_entry *entry_main; 243 struct archive_string_conv *sconv; 244 245 ustar = (struct ustar *)a->format_data; 246 247 /* Setup default string conversion. */ 248 if (ustar->opt_sconv == NULL) { 249 if (!ustar->init_default_conversion) { 250 ustar->sconv_default = 251 archive_string_default_conversion_for_write(&(a->archive)); 252 ustar->init_default_conversion = 1; 253 } 254 sconv = ustar->sconv_default; 255 } else 256 sconv = ustar->opt_sconv; 257 258 /* Sanity check. */ 259 if (archive_entry_pathname(entry) == NULL) { 260 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 261 "Can't record entry in tar file without pathname"); 262 return (ARCHIVE_FAILED); 263 } 264 265 /* Only regular files (not hardlinks) have data. */ 266 if (archive_entry_hardlink(entry) != NULL || 267 archive_entry_symlink(entry) != NULL || 268 !(archive_entry_filetype(entry) == AE_IFREG)) 269 archive_entry_set_size(entry, 0); 270 271 if (AE_IFDIR == archive_entry_filetype(entry)) { 272 const char *p; 273 size_t path_length; 274 /* 275 * Ensure a trailing '/'. Modify the entry so 276 * the client sees the change. 277 */ 278 #if defined(_WIN32) && !defined(__CYGWIN__) 279 const wchar_t *wp; 280 281 wp = archive_entry_pathname_w(entry); 282 if (wp != NULL && wp[wcslen(wp) -1] != L'/') { 283 struct archive_wstring ws; 284 285 archive_string_init(&ws); 286 path_length = wcslen(wp); 287 if (archive_wstring_ensure(&ws, 288 path_length + 2) == NULL) { 289 archive_set_error(&a->archive, ENOMEM, 290 "Can't allocate ustar data"); 291 archive_wstring_free(&ws); 292 return(ARCHIVE_FATAL); 293 } 294 /* Should we keep '\' ? */ 295 if (wp[path_length -1] == L'\\') 296 path_length--; 297 archive_wstrncpy(&ws, wp, path_length); 298 archive_wstrappend_wchar(&ws, L'/'); 299 archive_entry_copy_pathname_w(entry, ws.s); 300 archive_wstring_free(&ws); 301 p = NULL; 302 } else 303 #endif 304 p = archive_entry_pathname(entry); 305 /* 306 * On Windows, this is a backup operation just in 307 * case getting WCS failed. On POSIX, this is a 308 * normal operation. 309 */ 310 if (p != NULL && p[strlen(p) - 1] != '/') { 311 struct archive_string as; 312 313 archive_string_init(&as); 314 path_length = strlen(p); 315 if (archive_string_ensure(&as, 316 path_length + 2) == NULL) { 317 archive_set_error(&a->archive, ENOMEM, 318 "Can't allocate ustar data"); 319 archive_string_free(&as); 320 return(ARCHIVE_FATAL); 321 } 322 #if defined(_WIN32) && !defined(__CYGWIN__) 323 /* NOTE: This might break the pathname 324 * if the current code page is CP932 and 325 * the pathname includes a character '\' 326 * as a part of its multibyte pathname. */ 327 if (p[strlen(p) -1] == '\\') 328 path_length--; 329 else 330 #endif 331 archive_strncpy(&as, p, path_length); 332 archive_strappend_char(&as, '/'); 333 archive_entry_copy_pathname(entry, as.s); 334 archive_string_free(&as); 335 } 336 } 337 338 #if defined(_WIN32) && !defined(__CYGWIN__) 339 /* Make sure the path separators in pahtname, hardlink and symlink 340 * are all slash '/', not the Windows path separator '\'. */ 341 entry_main = __la_win_entry_in_posix_pathseparator(entry); 342 if (entry_main == NULL) { 343 archive_set_error(&a->archive, ENOMEM, 344 "Can't allocate ustar data"); 345 return(ARCHIVE_FATAL); 346 } 347 if (entry != entry_main) 348 entry = entry_main; 349 else 350 entry_main = NULL; 351 #else 352 entry_main = NULL; 353 #endif 354 ret = __archive_write_format_header_ustar(a, buff, entry, -1, 1, sconv); 355 if (ret < ARCHIVE_WARN) { 356 if (entry_main) 357 archive_entry_free(entry_main); 358 return (ret); 359 } 360 ret2 = __archive_write_output(a, buff, 512); 361 if (ret2 < ARCHIVE_WARN) { 362 if (entry_main) 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 if (entry_main) 372 archive_entry_free(entry_main); 373 return (ret); 374 } 375 376 /* 377 * Format a basic 512-byte "ustar" header. 378 * 379 * Returns -1 if format failed (due to field overflow). 380 * Note that this always formats as much of the header as possible. 381 * If "strict" is set to zero, it will extend numeric fields as 382 * necessary (overwriting terminators or using base-256 extensions). 383 * 384 * This is exported so that other 'tar' formats can use it. 385 */ 386 int 387 __archive_write_format_header_ustar(struct archive_write *a, char h[512], 388 struct archive_entry *entry, int tartype, int strict, 389 struct archive_string_conv *sconv) 390 { 391 unsigned int checksum; 392 int i, r, ret; 393 size_t copy_length; 394 const char *p, *pp; 395 int mytartype; 396 397 ret = 0; 398 mytartype = -1; 399 /* 400 * The "template header" already includes the "ustar" 401 * signature, various end-of-field markers and other required 402 * elements. 403 */ 404 memcpy(h, &template_header, 512); 405 406 /* 407 * Because the block is already null-filled, and strings 408 * are allowed to exactly fill their destination (without null), 409 * I use memcpy(dest, src, strlen()) here a lot to copy strings. 410 */ 411 r = archive_entry_pathname_l(entry, &pp, ©_length, sconv); 412 if (r != 0) { 413 if (errno == ENOMEM) { 414 archive_set_error(&a->archive, ENOMEM, 415 "Can't allocate memory for Pathname"); 416 return (ARCHIVE_FATAL); 417 } 418 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 419 "Can't translate pathname '%s' to %s", 420 pp, archive_string_conversion_charset_name(sconv)); 421 ret = ARCHIVE_WARN; 422 } 423 if (copy_length <= USTAR_name_size) 424 memcpy(h + USTAR_name_offset, pp, copy_length); 425 else { 426 /* Store in two pieces, splitting at a '/'. */ 427 p = strchr(pp + copy_length - USTAR_name_size - 1, '/'); 428 /* 429 * Look for the next '/' if we chose the first character 430 * as the separator. (ustar format doesn't permit 431 * an empty prefix.) 432 */ 433 if (p == pp) 434 p = strchr(p + 1, '/'); 435 /* Fail if the name won't fit. */ 436 if (!p) { 437 /* No separator. */ 438 archive_set_error(&a->archive, ENAMETOOLONG, 439 "Pathname too long"); 440 ret = ARCHIVE_FAILED; 441 } else if (p[1] == '\0') { 442 /* 443 * The only feasible separator is a final '/'; 444 * this would result in a non-empty prefix and 445 * an empty name, which POSIX doesn't 446 * explicitly forbid, but it just feels wrong. 447 */ 448 archive_set_error(&a->archive, ENAMETOOLONG, 449 "Pathname too long"); 450 ret = ARCHIVE_FAILED; 451 } else if (p > pp + USTAR_prefix_size) { 452 /* Prefix is too long. */ 453 archive_set_error(&a->archive, ENAMETOOLONG, 454 "Pathname too long"); 455 ret = ARCHIVE_FAILED; 456 } else { 457 /* Copy prefix and remainder to appropriate places */ 458 memcpy(h + USTAR_prefix_offset, pp, p - pp); 459 memcpy(h + USTAR_name_offset, p + 1, 460 pp + copy_length - p - 1); 461 } 462 } 463 464 r = archive_entry_hardlink_l(entry, &p, ©_length, sconv); 465 if (r != 0) { 466 if (errno == ENOMEM) { 467 archive_set_error(&a->archive, ENOMEM, 468 "Can't allocate memory for Linkname"); 469 return (ARCHIVE_FATAL); 470 } 471 archive_set_error(&a->archive, 472 ARCHIVE_ERRNO_FILE_FORMAT, 473 "Can't translate linkname '%s' to %s", 474 p, archive_string_conversion_charset_name(sconv)); 475 ret = ARCHIVE_WARN; 476 } 477 if (copy_length > 0) 478 mytartype = '1'; 479 else { 480 r = archive_entry_symlink_l(entry, &p, ©_length, sconv); 481 if (r != 0) { 482 if (errno == ENOMEM) { 483 archive_set_error(&a->archive, ENOMEM, 484 "Can't allocate memory for Linkname"); 485 return (ARCHIVE_FATAL); 486 } 487 archive_set_error(&a->archive, 488 ARCHIVE_ERRNO_FILE_FORMAT, 489 "Can't translate linkname '%s' to %s", 490 p, archive_string_conversion_charset_name(sconv)); 491 ret = ARCHIVE_WARN; 492 } 493 } 494 if (copy_length > 0) { 495 if (copy_length > USTAR_linkname_size) { 496 archive_set_error(&a->archive, ENAMETOOLONG, 497 "Link contents too long"); 498 ret = ARCHIVE_FAILED; 499 copy_length = USTAR_linkname_size; 500 } 501 memcpy(h + USTAR_linkname_offset, p, copy_length); 502 } 503 504 r = archive_entry_uname_l(entry, &p, ©_length, sconv); 505 if (r != 0) { 506 if (errno == ENOMEM) { 507 archive_set_error(&a->archive, ENOMEM, 508 "Can't allocate memory for Uname"); 509 return (ARCHIVE_FATAL); 510 } 511 archive_set_error(&a->archive, 512 ARCHIVE_ERRNO_FILE_FORMAT, 513 "Can't translate uname '%s' to %s", 514 p, archive_string_conversion_charset_name(sconv)); 515 ret = ARCHIVE_WARN; 516 } 517 if (copy_length > 0) { 518 if (copy_length > USTAR_uname_size) { 519 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 520 "Username too long"); 521 ret = ARCHIVE_FAILED; 522 copy_length = USTAR_uname_size; 523 } 524 memcpy(h + USTAR_uname_offset, p, copy_length); 525 } 526 527 r = archive_entry_gname_l(entry, &p, ©_length, sconv); 528 if (r != 0) { 529 if (errno == ENOMEM) { 530 archive_set_error(&a->archive, ENOMEM, 531 "Can't allocate memory for Gname"); 532 return (ARCHIVE_FATAL); 533 } 534 archive_set_error(&a->archive, 535 ARCHIVE_ERRNO_FILE_FORMAT, 536 "Can't translate gname '%s' to %s", 537 p, archive_string_conversion_charset_name(sconv)); 538 ret = ARCHIVE_WARN; 539 } 540 if (copy_length > 0) { 541 if (strlen(p) > USTAR_gname_size) { 542 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 543 "Group name too long"); 544 ret = ARCHIVE_FAILED; 545 copy_length = USTAR_gname_size; 546 } 547 memcpy(h + USTAR_gname_offset, p, copy_length); 548 } 549 550 if (format_number(archive_entry_mode(entry) & 07777, 551 h + USTAR_mode_offset, USTAR_mode_size, USTAR_mode_max_size, strict)) { 552 archive_set_error(&a->archive, ERANGE, 553 "Numeric mode too large"); 554 ret = ARCHIVE_FAILED; 555 } 556 557 if (format_number(archive_entry_uid(entry), 558 h + USTAR_uid_offset, USTAR_uid_size, USTAR_uid_max_size, strict)) { 559 archive_set_error(&a->archive, ERANGE, 560 "Numeric user ID too large"); 561 ret = ARCHIVE_FAILED; 562 } 563 564 if (format_number(archive_entry_gid(entry), 565 h + USTAR_gid_offset, USTAR_gid_size, USTAR_gid_max_size, strict)) { 566 archive_set_error(&a->archive, ERANGE, 567 "Numeric group ID too large"); 568 ret = ARCHIVE_FAILED; 569 } 570 571 if (format_number(archive_entry_size(entry), 572 h + USTAR_size_offset, USTAR_size_size, USTAR_size_max_size, strict)) { 573 archive_set_error(&a->archive, ERANGE, 574 "File size out of range"); 575 ret = ARCHIVE_FAILED; 576 } 577 578 if (format_number(archive_entry_mtime(entry), 579 h + USTAR_mtime_offset, USTAR_mtime_size, USTAR_mtime_max_size, strict)) { 580 archive_set_error(&a->archive, ERANGE, 581 "File modification time too large"); 582 ret = ARCHIVE_FAILED; 583 } 584 585 if (archive_entry_filetype(entry) == AE_IFBLK 586 || archive_entry_filetype(entry) == AE_IFCHR) { 587 if (format_number(archive_entry_rdevmajor(entry), 588 h + USTAR_rdevmajor_offset, USTAR_rdevmajor_size, 589 USTAR_rdevmajor_max_size, strict)) { 590 archive_set_error(&a->archive, ERANGE, 591 "Major device number too large"); 592 ret = ARCHIVE_FAILED; 593 } 594 595 if (format_number(archive_entry_rdevminor(entry), 596 h + USTAR_rdevminor_offset, USTAR_rdevminor_size, 597 USTAR_rdevminor_max_size, strict)) { 598 archive_set_error(&a->archive, ERANGE, 599 "Minor device number too large"); 600 ret = ARCHIVE_FAILED; 601 } 602 } 603 604 if (tartype >= 0) { 605 h[USTAR_typeflag_offset] = tartype; 606 } else if (mytartype >= 0) { 607 h[USTAR_typeflag_offset] = mytartype; 608 } else { 609 switch (archive_entry_filetype(entry)) { 610 case AE_IFREG: h[USTAR_typeflag_offset] = '0' ; break; 611 case AE_IFLNK: h[USTAR_typeflag_offset] = '2' ; break; 612 case AE_IFCHR: h[USTAR_typeflag_offset] = '3' ; break; 613 case AE_IFBLK: h[USTAR_typeflag_offset] = '4' ; break; 614 case AE_IFDIR: h[USTAR_typeflag_offset] = '5' ; break; 615 case AE_IFIFO: h[USTAR_typeflag_offset] = '6' ; break; 616 case AE_IFSOCK: 617 archive_set_error(&a->archive, 618 ARCHIVE_ERRNO_FILE_FORMAT, 619 "tar format cannot archive socket"); 620 return (ARCHIVE_FAILED); 621 default: 622 archive_set_error(&a->archive, 623 ARCHIVE_ERRNO_FILE_FORMAT, 624 "tar format cannot archive this (mode=0%lo)", 625 (unsigned long)archive_entry_mode(entry)); 626 ret = ARCHIVE_FAILED; 627 } 628 } 629 630 checksum = 0; 631 for (i = 0; i < 512; i++) 632 checksum += 255 & (unsigned int)h[i]; 633 h[USTAR_checksum_offset + 6] = '\0'; /* Can't be pre-set in the template. */ 634 /* h[USTAR_checksum_offset + 7] = ' '; */ /* This is pre-set in the template. */ 635 format_octal(checksum, h + USTAR_checksum_offset, 6); 636 return (ret); 637 } 638 639 /* 640 * Format a number into a field, with some intelligence. 641 */ 642 static int 643 format_number(int64_t v, char *p, int s, int maxsize, int strict) 644 { 645 int64_t limit; 646 647 limit = ((int64_t)1 << (s*3)); 648 649 /* "Strict" only permits octal values with proper termination. */ 650 if (strict) 651 return (format_octal(v, p, s)); 652 653 /* 654 * In non-strict mode, we allow the number to overwrite one or 655 * more bytes of the field termination. Even old tar 656 * implementations should be able to handle this with no 657 * problem. 658 */ 659 if (v >= 0) { 660 while (s <= maxsize) { 661 if (v < limit) 662 return (format_octal(v, p, s)); 663 s++; 664 limit <<= 3; 665 } 666 } 667 668 /* Base-256 can handle any number, positive or negative. */ 669 return (format_256(v, p, maxsize)); 670 } 671 672 /* 673 * Format a number into the specified field using base-256. 674 */ 675 static int 676 format_256(int64_t v, char *p, int s) 677 { 678 p += s; 679 while (s-- > 0) { 680 *--p = (char)(v & 0xff); 681 v >>= 8; 682 } 683 *p |= 0x80; /* Set the base-256 marker bit. */ 684 return (0); 685 } 686 687 /* 688 * Format a number into the specified field. 689 */ 690 static int 691 format_octal(int64_t v, char *p, int s) 692 { 693 int len; 694 695 len = s; 696 697 /* Octal values can't be negative, so use 0. */ 698 if (v < 0) { 699 while (len-- > 0) 700 *p++ = '0'; 701 return (-1); 702 } 703 704 p += s; /* Start at the end and work backwards. */ 705 while (s-- > 0) { 706 *--p = (char)('0' + (v & 7)); 707 v >>= 3; 708 } 709 710 if (v == 0) 711 return (0); 712 713 /* If it overflowed, fill field with max value. */ 714 while (len-- > 0) 715 *p++ = '7'; 716 717 return (-1); 718 } 719 720 static int 721 archive_write_ustar_close(struct archive_write *a) 722 { 723 return (__archive_write_nulls(a, 512*2)); 724 } 725 726 static int 727 archive_write_ustar_free(struct archive_write *a) 728 { 729 struct ustar *ustar; 730 731 ustar = (struct ustar *)a->format_data; 732 free(ustar); 733 a->format_data = NULL; 734 return (ARCHIVE_OK); 735 } 736 737 static int 738 archive_write_ustar_finish_entry(struct archive_write *a) 739 { 740 struct ustar *ustar; 741 int ret; 742 743 ustar = (struct ustar *)a->format_data; 744 ret = __archive_write_nulls(a, 745 (size_t)(ustar->entry_bytes_remaining + ustar->entry_padding)); 746 ustar->entry_bytes_remaining = ustar->entry_padding = 0; 747 return (ret); 748 } 749 750 static ssize_t 751 archive_write_ustar_data(struct archive_write *a, const void *buff, size_t s) 752 { 753 struct ustar *ustar; 754 int ret; 755 756 ustar = (struct ustar *)a->format_data; 757 if (s > ustar->entry_bytes_remaining) 758 s = (size_t)ustar->entry_bytes_remaining; 759 ret = __archive_write_output(a, buff, s); 760 ustar->entry_bytes_remaining -= s; 761 if (ret != ARCHIVE_OK) 762 return (ret); 763 return (s); 764 } 765