1 /*- 2 * Copyright (c) 2003-2007 Tim Kientzle 3 * Copyright (c) 2010-2012 Michihiro NAKAJIMA 4 * Copyright (c) 2016 Martin Matuska 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "archive_platform.h" 29 __FBSDID("$FreeBSD$"); 30 31 #ifdef HAVE_ERRNO_H 32 #include <errno.h> 33 #endif 34 #ifdef HAVE_STDLIB_H 35 #include <stdlib.h> 36 #endif 37 #ifdef HAVE_STRING_H 38 #include <string.h> 39 #endif 40 41 #include "archive.h" 42 #include "archive_entry.h" 43 #include "archive_entry_locale.h" 44 #include "archive_private.h" 45 #include "archive_write_private.h" 46 #include "archive_write_set_format_private.h" 47 48 struct sparse_block { 49 struct sparse_block *next; 50 int is_hole; 51 uint64_t offset; 52 uint64_t remaining; 53 }; 54 55 struct pax { 56 uint64_t entry_bytes_remaining; 57 uint64_t entry_padding; 58 struct archive_string l_url_encoded_name; 59 struct archive_string pax_header; 60 struct archive_string sparse_map; 61 size_t sparse_map_padding; 62 struct sparse_block *sparse_list; 63 struct sparse_block *sparse_tail; 64 struct archive_string_conv *sconv_utf8; 65 int opt_binary; 66 67 unsigned flags; 68 #define WRITE_SCHILY_XATTR (1 << 0) 69 #define WRITE_LIBARCHIVE_XATTR (1 << 1) 70 }; 71 72 static void add_pax_attr(struct archive_string *, const char *key, 73 const char *value); 74 static void add_pax_attr_binary(struct archive_string *, 75 const char *key, 76 const char *value, size_t value_len); 77 static void add_pax_attr_int(struct archive_string *, 78 const char *key, int64_t value); 79 static void add_pax_attr_time(struct archive_string *, 80 const char *key, int64_t sec, 81 unsigned long nanos); 82 static int add_pax_acl(struct archive_write *, 83 struct archive_entry *, struct pax *, int); 84 static ssize_t archive_write_pax_data(struct archive_write *, 85 const void *, size_t); 86 static int archive_write_pax_close(struct archive_write *); 87 static int archive_write_pax_free(struct archive_write *); 88 static int archive_write_pax_finish_entry(struct archive_write *); 89 static int archive_write_pax_header(struct archive_write *, 90 struct archive_entry *); 91 static int archive_write_pax_options(struct archive_write *, 92 const char *, const char *); 93 static char *base64_encode(const char *src, size_t len); 94 static char *build_gnu_sparse_name(char *dest, const char *src); 95 static char *build_pax_attribute_name(char *dest, const char *src); 96 static char *build_ustar_entry_name(char *dest, const char *src, 97 size_t src_length, const char *insert); 98 static char *format_int(char *dest, int64_t); 99 static int has_non_ASCII(const char *); 100 static void sparse_list_clear(struct pax *); 101 static int sparse_list_add(struct pax *, int64_t, int64_t); 102 static char *url_encode(const char *in); 103 static time_t get_ustar_max_mtime(void); 104 105 /* 106 * Set output format to 'restricted pax' format. 107 * 108 * This is the same as normal 'pax', but tries to suppress 109 * the pax header whenever possible. This is the default for 110 * bsdtar, for instance. 111 */ 112 int 113 archive_write_set_format_pax_restricted(struct archive *_a) 114 { 115 struct archive_write *a = (struct archive_write *)_a; 116 int r; 117 118 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 119 ARCHIVE_STATE_NEW, "archive_write_set_format_pax_restricted"); 120 121 r = archive_write_set_format_pax(&a->archive); 122 a->archive.archive_format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 123 a->archive.archive_format_name = "restricted POSIX pax interchange"; 124 return (r); 125 } 126 127 /* 128 * Set output format to 'pax' format. 129 */ 130 int 131 archive_write_set_format_pax(struct archive *_a) 132 { 133 struct archive_write *a = (struct archive_write *)_a; 134 struct pax *pax; 135 136 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 137 ARCHIVE_STATE_NEW, "archive_write_set_format_pax"); 138 139 if (a->format_free != NULL) 140 (a->format_free)(a); 141 142 pax = (struct pax *)calloc(1, sizeof(*pax)); 143 if (pax == NULL) { 144 archive_set_error(&a->archive, ENOMEM, 145 "Can't allocate pax data"); 146 return (ARCHIVE_FATAL); 147 } 148 pax->flags = WRITE_LIBARCHIVE_XATTR | WRITE_SCHILY_XATTR; 149 150 a->format_data = pax; 151 a->format_name = "pax"; 152 a->format_options = archive_write_pax_options; 153 a->format_write_header = archive_write_pax_header; 154 a->format_write_data = archive_write_pax_data; 155 a->format_close = archive_write_pax_close; 156 a->format_free = archive_write_pax_free; 157 a->format_finish_entry = archive_write_pax_finish_entry; 158 a->archive.archive_format = ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE; 159 a->archive.archive_format_name = "POSIX pax interchange"; 160 return (ARCHIVE_OK); 161 } 162 163 static int 164 archive_write_pax_options(struct archive_write *a, const char *key, 165 const char *val) 166 { 167 struct pax *pax = (struct pax *)a->format_data; 168 int ret = ARCHIVE_FAILED; 169 170 if (strcmp(key, "hdrcharset") == 0) { 171 /* 172 * The character-set we can use are defined in 173 * IEEE Std 1003.1-2001 174 */ 175 if (val == NULL || val[0] == 0) 176 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 177 "pax: hdrcharset option needs a character-set name"); 178 else if (strcmp(val, "BINARY") == 0 || 179 strcmp(val, "binary") == 0) { 180 /* 181 * Specify binary mode. We will not convert 182 * filenames, uname and gname to any charsets. 183 */ 184 pax->opt_binary = 1; 185 ret = ARCHIVE_OK; 186 } else if (strcmp(val, "UTF-8") == 0) { 187 /* 188 * Specify UTF-8 character-set to be used for 189 * filenames. This is almost the test that 190 * running platform supports the string conversion. 191 * Especially libarchive_test needs this trick for 192 * its test. 193 */ 194 pax->sconv_utf8 = archive_string_conversion_to_charset( 195 &(a->archive), "UTF-8", 0); 196 if (pax->sconv_utf8 == NULL) 197 ret = ARCHIVE_FATAL; 198 else 199 ret = ARCHIVE_OK; 200 } else 201 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 202 "pax: invalid charset name"); 203 return (ret); 204 } else if (strcmp(key, "xattrheader") == 0) { 205 if (val == NULL || val[0] == 0) { 206 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 207 "pax: xattrheader requires a value"); 208 } else if (strcmp(val, "ALL") == 0 || 209 strcmp(val, "all") == 0) { 210 pax->flags |= WRITE_LIBARCHIVE_XATTR | WRITE_SCHILY_XATTR; 211 ret = ARCHIVE_OK; 212 } else if (strcmp(val, "SCHILY") == 0 || 213 strcmp(val, "schily") == 0) { 214 pax->flags |= WRITE_SCHILY_XATTR; 215 pax->flags &= ~WRITE_LIBARCHIVE_XATTR; 216 ret = ARCHIVE_OK; 217 } else if (strcmp(val, "LIBARCHIVE") == 0 || 218 strcmp(val, "libarchive") == 0) { 219 pax->flags |= WRITE_LIBARCHIVE_XATTR; 220 pax->flags &= ~WRITE_SCHILY_XATTR; 221 ret = ARCHIVE_OK; 222 } else 223 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 224 "pax: invalid xattr header name"); 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 /* 235 * Note: This code assumes that 'nanos' has the same sign as 'sec', 236 * which implies that sec=-1, nanos=200000000 represents -1.2 seconds 237 * and not -0.8 seconds. This is a pretty pedantic point, as we're 238 * unlikely to encounter many real files created before Jan 1, 1970, 239 * much less ones with timestamps recorded to sub-second resolution. 240 */ 241 static void 242 add_pax_attr_time(struct archive_string *as, const char *key, 243 int64_t sec, unsigned long nanos) 244 { 245 int digit, i; 246 char *t; 247 /* 248 * Note that each byte contributes fewer than 3 base-10 249 * digits, so this will always be big enough. 250 */ 251 char tmp[1 + 3*sizeof(sec) + 1 + 3*sizeof(nanos)]; 252 253 tmp[sizeof(tmp) - 1] = 0; 254 t = tmp + sizeof(tmp) - 1; 255 256 /* Skip trailing zeros in the fractional part. */ 257 for (digit = 0, i = 10; i > 0 && digit == 0; i--) { 258 digit = nanos % 10; 259 nanos /= 10; 260 } 261 262 /* Only format the fraction if it's non-zero. */ 263 if (i > 0) { 264 while (i > 0) { 265 *--t = "0123456789"[digit]; 266 digit = nanos % 10; 267 nanos /= 10; 268 i--; 269 } 270 *--t = '.'; 271 } 272 t = format_int(t, sec); 273 274 add_pax_attr(as, key, t); 275 } 276 277 static char * 278 format_int(char *t, int64_t i) 279 { 280 uint64_t ui; 281 282 if (i < 0) 283 ui = (i == INT64_MIN) ? (uint64_t)(INT64_MAX) + 1 : (uint64_t)(-i); 284 else 285 ui = i; 286 287 do { 288 *--t = "0123456789"[ui % 10]; 289 } while (ui /= 10); 290 if (i < 0) 291 *--t = '-'; 292 return (t); 293 } 294 295 static void 296 add_pax_attr_int(struct archive_string *as, const char *key, int64_t value) 297 { 298 char tmp[1 + 3 * sizeof(value)]; 299 300 tmp[sizeof(tmp) - 1] = 0; 301 add_pax_attr(as, key, format_int(tmp + sizeof(tmp) - 1, value)); 302 } 303 304 /* 305 * Add a key/value attribute to the pax header. This function handles 306 * the length field and various other syntactic requirements. 307 */ 308 static void 309 add_pax_attr(struct archive_string *as, const char *key, const char *value) 310 { 311 add_pax_attr_binary(as, key, value, strlen(value)); 312 } 313 314 /* 315 * Add a key/value attribute to the pax header. This function handles 316 * binary values. 317 */ 318 static void 319 add_pax_attr_binary(struct archive_string *as, const char *key, 320 const char *value, size_t value_len) 321 { 322 int digits, i, len, next_ten; 323 char tmp[1 + 3 * sizeof(int)]; /* < 3 base-10 digits per byte */ 324 325 /*- 326 * PAX attributes have the following layout: 327 * <len> <space> <key> <=> <value> <nl> 328 */ 329 len = 1 + (int)strlen(key) + 1 + (int)value_len + 1; 330 331 /* 332 * The <len> field includes the length of the <len> field, so 333 * computing the correct length is tricky. I start by 334 * counting the number of base-10 digits in 'len' and 335 * computing the next higher power of 10. 336 */ 337 next_ten = 1; 338 digits = 0; 339 i = len; 340 while (i > 0) { 341 i = i / 10; 342 digits++; 343 next_ten = next_ten * 10; 344 } 345 /* 346 * For example, if string without the length field is 99 347 * chars, then adding the 2 digit length "99" will force the 348 * total length past 100, requiring an extra digit. The next 349 * statement adjusts for this effect. 350 */ 351 if (len + digits >= next_ten) 352 digits++; 353 354 /* Now, we have the right length so we can build the line. */ 355 tmp[sizeof(tmp) - 1] = 0; /* Null-terminate the work area. */ 356 archive_strcat(as, format_int(tmp + sizeof(tmp) - 1, len + digits)); 357 archive_strappend_char(as, ' '); 358 archive_strcat(as, key); 359 archive_strappend_char(as, '='); 360 archive_array_append(as, value, value_len); 361 archive_strappend_char(as, '\n'); 362 } 363 364 static void 365 archive_write_pax_header_xattr(struct pax *pax, const char *encoded_name, 366 const void *value, size_t value_len) 367 { 368 struct archive_string s; 369 char *encoded_value; 370 371 if (encoded_name == NULL) 372 return; 373 374 if (pax->flags & WRITE_LIBARCHIVE_XATTR) { 375 encoded_value = base64_encode((const char *)value, value_len); 376 if (encoded_value != NULL) { 377 archive_string_init(&s); 378 archive_strcpy(&s, "LIBARCHIVE.xattr."); 379 archive_strcat(&s, encoded_name); 380 add_pax_attr(&(pax->pax_header), s.s, encoded_value); 381 archive_string_free(&s); 382 } 383 free(encoded_value); 384 } 385 if (pax->flags & WRITE_SCHILY_XATTR) { 386 archive_string_init(&s); 387 archive_strcpy(&s, "SCHILY.xattr."); 388 archive_strcat(&s, encoded_name); 389 add_pax_attr_binary(&(pax->pax_header), s.s, value, value_len); 390 archive_string_free(&s); 391 } 392 } 393 394 static int 395 archive_write_pax_header_xattrs(struct archive_write *a, 396 struct pax *pax, struct archive_entry *entry) 397 { 398 int i = archive_entry_xattr_reset(entry); 399 400 while (i--) { 401 const char *name; 402 const void *value; 403 char *url_encoded_name = NULL, *encoded_name = NULL; 404 size_t size; 405 int r; 406 407 archive_entry_xattr_next(entry, &name, &value, &size); 408 url_encoded_name = url_encode(name); 409 if (url_encoded_name == NULL) 410 goto malloc_error; 411 else { 412 /* Convert narrow-character to UTF-8. */ 413 r = archive_strcpy_l(&(pax->l_url_encoded_name), 414 url_encoded_name, pax->sconv_utf8); 415 free(url_encoded_name); /* Done with this. */ 416 if (r == 0) 417 encoded_name = pax->l_url_encoded_name.s; 418 else if (r == -1) 419 goto malloc_error; 420 else { 421 archive_set_error(&a->archive, 422 ARCHIVE_ERRNO_MISC, 423 "Error encoding pax extended attribute"); 424 return (ARCHIVE_FAILED); 425 } 426 } 427 428 archive_write_pax_header_xattr(pax, encoded_name, 429 value, size); 430 431 } 432 return (ARCHIVE_OK); 433 malloc_error: 434 archive_set_error(&a->archive, ENOMEM, "Can't allocate memory"); 435 return (ARCHIVE_FATAL); 436 } 437 438 static int 439 get_entry_hardlink(struct archive_write *a, struct archive_entry *entry, 440 const char **name, size_t *length, struct archive_string_conv *sc) 441 { 442 int r; 443 444 r = archive_entry_hardlink_l(entry, name, length, sc); 445 if (r != 0) { 446 if (errno == ENOMEM) { 447 archive_set_error(&a->archive, ENOMEM, 448 "Can't allocate memory for Linkname"); 449 return (ARCHIVE_FATAL); 450 } 451 return (ARCHIVE_WARN); 452 } 453 return (ARCHIVE_OK); 454 } 455 456 static int 457 get_entry_pathname(struct archive_write *a, struct archive_entry *entry, 458 const char **name, size_t *length, struct archive_string_conv *sc) 459 { 460 int r; 461 462 r = archive_entry_pathname_l(entry, name, length, sc); 463 if (r != 0) { 464 if (errno == ENOMEM) { 465 archive_set_error(&a->archive, ENOMEM, 466 "Can't allocate memory for Pathname"); 467 return (ARCHIVE_FATAL); 468 } 469 return (ARCHIVE_WARN); 470 } 471 return (ARCHIVE_OK); 472 } 473 474 static int 475 get_entry_uname(struct archive_write *a, struct archive_entry *entry, 476 const char **name, size_t *length, struct archive_string_conv *sc) 477 { 478 int r; 479 480 r = archive_entry_uname_l(entry, name, length, sc); 481 if (r != 0) { 482 if (errno == ENOMEM) { 483 archive_set_error(&a->archive, ENOMEM, 484 "Can't allocate memory for Uname"); 485 return (ARCHIVE_FATAL); 486 } 487 return (ARCHIVE_WARN); 488 } 489 return (ARCHIVE_OK); 490 } 491 492 static int 493 get_entry_gname(struct archive_write *a, struct archive_entry *entry, 494 const char **name, size_t *length, struct archive_string_conv *sc) 495 { 496 int r; 497 498 r = archive_entry_gname_l(entry, name, length, sc); 499 if (r != 0) { 500 if (errno == ENOMEM) { 501 archive_set_error(&a->archive, ENOMEM, 502 "Can't allocate memory for Gname"); 503 return (ARCHIVE_FATAL); 504 } 505 return (ARCHIVE_WARN); 506 } 507 return (ARCHIVE_OK); 508 } 509 510 static int 511 get_entry_symlink(struct archive_write *a, struct archive_entry *entry, 512 const char **name, size_t *length, struct archive_string_conv *sc) 513 { 514 int r; 515 516 r = archive_entry_symlink_l(entry, name, length, sc); 517 if (r != 0) { 518 if (errno == ENOMEM) { 519 archive_set_error(&a->archive, ENOMEM, 520 "Can't allocate memory for Linkname"); 521 return (ARCHIVE_FATAL); 522 } 523 return (ARCHIVE_WARN); 524 } 525 return (ARCHIVE_OK); 526 } 527 528 /* Add ACL to pax header */ 529 static int 530 add_pax_acl(struct archive_write *a, 531 struct archive_entry *entry, struct pax *pax, int flags) 532 { 533 char *p; 534 const char *attr; 535 int acl_types; 536 537 acl_types = archive_entry_acl_types(entry); 538 539 if ((acl_types & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) 540 attr = "SCHILY.acl.ace"; 541 else if ((flags & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0) 542 attr = "SCHILY.acl.access"; 543 else if ((flags & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) != 0) 544 attr = "SCHILY.acl.default"; 545 else 546 return (ARCHIVE_FATAL); 547 548 p = archive_entry_acl_to_text_l(entry, NULL, flags, pax->sconv_utf8); 549 if (p == NULL) { 550 if (errno == ENOMEM) { 551 archive_set_error(&a->archive, ENOMEM, "%s %s", 552 "Can't allocate memory for ", attr); 553 return (ARCHIVE_FATAL); 554 } 555 archive_set_error(&a->archive, 556 ARCHIVE_ERRNO_FILE_FORMAT, "%s %s %s", 557 "Can't translate ", attr, " to UTF-8"); 558 return(ARCHIVE_WARN); 559 } 560 561 if (*p != '\0') { 562 add_pax_attr(&(pax->pax_header), 563 attr, p); 564 } 565 free(p); 566 return(ARCHIVE_OK); 567 } 568 569 /* 570 * TODO: Consider adding 'comment' and 'charset' fields to 571 * archive_entry so that clients can specify them. Also, consider 572 * adding generic key/value tags so clients can add arbitrary 573 * key/value data. 574 * 575 * TODO: Break up this 700-line function!!!! Yowza! 576 */ 577 static int 578 archive_write_pax_header(struct archive_write *a, 579 struct archive_entry *entry_original) 580 { 581 struct archive_entry *entry_main; 582 const char *p; 583 const char *suffix; 584 int need_extension, r, ret; 585 int acl_types; 586 int sparse_count; 587 uint64_t sparse_total, real_size; 588 struct pax *pax; 589 const char *hardlink; 590 const char *path = NULL, *linkpath = NULL; 591 const char *uname = NULL, *gname = NULL; 592 const void *mac_metadata; 593 size_t mac_metadata_size; 594 struct archive_string_conv *sconv; 595 size_t hardlink_length, path_length, linkpath_length; 596 size_t uname_length, gname_length; 597 598 char paxbuff[512]; 599 char ustarbuff[512]; 600 char ustar_entry_name[256]; 601 char pax_entry_name[256]; 602 char gnu_sparse_name[256]; 603 struct archive_string entry_name; 604 605 ret = ARCHIVE_OK; 606 need_extension = 0; 607 pax = (struct pax *)a->format_data; 608 609 const time_t ustar_max_mtime = get_ustar_max_mtime(); 610 611 /* Sanity check. */ 612 if (archive_entry_pathname(entry_original) == NULL) { 613 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 614 "Can't record entry in tar file without pathname"); 615 return (ARCHIVE_FAILED); 616 } 617 618 /* 619 * Choose a header encoding. 620 */ 621 if (pax->opt_binary) 622 sconv = NULL;/* Binary mode. */ 623 else { 624 /* Header encoding is UTF-8. */ 625 if (pax->sconv_utf8 == NULL) { 626 /* Initialize the string conversion object 627 * we must need */ 628 pax->sconv_utf8 = archive_string_conversion_to_charset( 629 &(a->archive), "UTF-8", 1); 630 if (pax->sconv_utf8 == NULL) 631 /* Couldn't allocate memory */ 632 return (ARCHIVE_FAILED); 633 } 634 sconv = pax->sconv_utf8; 635 } 636 637 r = get_entry_hardlink(a, entry_original, &hardlink, 638 &hardlink_length, sconv); 639 if (r == ARCHIVE_FATAL) 640 return (r); 641 else if (r != ARCHIVE_OK) { 642 r = get_entry_hardlink(a, entry_original, &hardlink, 643 &hardlink_length, NULL); 644 if (r == ARCHIVE_FATAL) 645 return (r); 646 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 647 "Can't translate linkname '%s' to %s", hardlink, 648 archive_string_conversion_charset_name(sconv)); 649 ret = ARCHIVE_WARN; 650 sconv = NULL;/* The header charset switches to binary mode. */ 651 } 652 653 /* Make sure this is a type of entry that we can handle here */ 654 if (hardlink == NULL) { 655 switch (archive_entry_filetype(entry_original)) { 656 case AE_IFBLK: 657 case AE_IFCHR: 658 case AE_IFIFO: 659 case AE_IFLNK: 660 case AE_IFREG: 661 break; 662 case AE_IFDIR: 663 { 664 /* 665 * Ensure a trailing '/'. Modify the original 666 * entry so the client sees the change. 667 */ 668 #if defined(_WIN32) && !defined(__CYGWIN__) 669 const wchar_t *wp; 670 671 wp = archive_entry_pathname_w(entry_original); 672 if (wp != NULL && wp[wcslen(wp) -1] != L'/') { 673 struct archive_wstring ws; 674 675 archive_string_init(&ws); 676 path_length = wcslen(wp); 677 if (archive_wstring_ensure(&ws, 678 path_length + 2) == NULL) { 679 archive_set_error(&a->archive, ENOMEM, 680 "Can't allocate pax data"); 681 archive_wstring_free(&ws); 682 return(ARCHIVE_FATAL); 683 } 684 /* Should we keep '\' ? */ 685 if (wp[path_length -1] == L'\\') 686 path_length--; 687 archive_wstrncpy(&ws, wp, path_length); 688 archive_wstrappend_wchar(&ws, L'/'); 689 archive_entry_copy_pathname_w( 690 entry_original, ws.s); 691 archive_wstring_free(&ws); 692 p = NULL; 693 } else 694 #endif 695 p = archive_entry_pathname(entry_original); 696 /* 697 * On Windows, this is a backup operation just in 698 * case getting WCS failed. On POSIX, this is a 699 * normal operation. 700 */ 701 if (p != NULL && p[0] != '\0' && p[strlen(p) - 1] != '/') { 702 struct archive_string as; 703 704 archive_string_init(&as); 705 path_length = strlen(p); 706 if (archive_string_ensure(&as, 707 path_length + 2) == NULL) { 708 archive_set_error(&a->archive, ENOMEM, 709 "Can't allocate pax data"); 710 archive_string_free(&as); 711 return(ARCHIVE_FATAL); 712 } 713 #if defined(_WIN32) && !defined(__CYGWIN__) 714 /* NOTE: This might break the pathname 715 * if the current code page is CP932 and 716 * the pathname includes a character '\' 717 * as a part of its multibyte pathname. */ 718 if (p[strlen(p) -1] == '\\') 719 path_length--; 720 else 721 #endif 722 archive_strncpy(&as, p, path_length); 723 archive_strappend_char(&as, '/'); 724 archive_entry_copy_pathname( 725 entry_original, as.s); 726 archive_string_free(&as); 727 } 728 break; 729 } 730 default: /* AE_IFSOCK and unknown */ 731 __archive_write_entry_filetype_unsupported( 732 &a->archive, entry_original, "pax"); 733 return (ARCHIVE_FAILED); 734 } 735 } 736 737 /* 738 * If Mac OS metadata blob is here, recurse to write that 739 * as a separate entry. This is really a pretty poor design: 740 * In particular, it doubles the overhead for long filenames. 741 * TODO: Help Apple folks design something better and figure 742 * out how to transition from this legacy format. 743 * 744 * Note that this code is present on every platform; clients 745 * on non-Mac are unlikely to ever provide this data, but 746 * applications that copy entries from one archive to another 747 * should not lose data just because the local filesystem 748 * can't store it. 749 */ 750 mac_metadata = 751 archive_entry_mac_metadata(entry_original, &mac_metadata_size); 752 if (mac_metadata != NULL) { 753 const char *oname; 754 char *name, *bname; 755 size_t name_length; 756 struct archive_entry *extra = archive_entry_new2(&a->archive); 757 758 oname = archive_entry_pathname(entry_original); 759 name_length = strlen(oname); 760 name = malloc(name_length + 3); 761 if (name == NULL || extra == NULL) { 762 /* XXX error message */ 763 archive_entry_free(extra); 764 free(name); 765 return (ARCHIVE_FAILED); 766 } 767 strcpy(name, oname); 768 /* Find last '/'; strip trailing '/' characters */ 769 bname = strrchr(name, '/'); 770 while (bname != NULL && bname[1] == '\0') { 771 *bname = '\0'; 772 bname = strrchr(name, '/'); 773 } 774 if (bname == NULL) { 775 memmove(name + 2, name, name_length + 1); 776 memmove(name, "._", 2); 777 } else { 778 bname += 1; 779 memmove(bname + 2, bname, strlen(bname) + 1); 780 memmove(bname, "._", 2); 781 } 782 archive_entry_copy_pathname(extra, name); 783 free(name); 784 785 archive_entry_set_size(extra, mac_metadata_size); 786 archive_entry_set_filetype(extra, AE_IFREG); 787 archive_entry_set_perm(extra, 788 archive_entry_perm(entry_original)); 789 archive_entry_set_mtime(extra, 790 archive_entry_mtime(entry_original), 791 archive_entry_mtime_nsec(entry_original)); 792 archive_entry_set_gid(extra, 793 archive_entry_gid(entry_original)); 794 archive_entry_set_gname(extra, 795 archive_entry_gname(entry_original)); 796 archive_entry_set_uid(extra, 797 archive_entry_uid(entry_original)); 798 archive_entry_set_uname(extra, 799 archive_entry_uname(entry_original)); 800 801 /* Recurse to write the special copyfile entry. */ 802 r = archive_write_pax_header(a, extra); 803 archive_entry_free(extra); 804 if (r < ARCHIVE_WARN) 805 return (r); 806 if (r < ret) 807 ret = r; 808 r = (int)archive_write_pax_data(a, mac_metadata, 809 mac_metadata_size); 810 if (r < ARCHIVE_WARN) 811 return (r); 812 if (r < ret) 813 ret = r; 814 r = archive_write_pax_finish_entry(a); 815 if (r < ARCHIVE_WARN) 816 return (r); 817 if (r < ret) 818 ret = r; 819 } 820 821 /* Copy entry so we can modify it as needed. */ 822 #if defined(_WIN32) && !defined(__CYGWIN__) 823 /* Make sure the path separators in pathname, hardlink and symlink 824 * are all slash '/', not the Windows path separator '\'. */ 825 entry_main = __la_win_entry_in_posix_pathseparator(entry_original); 826 if (entry_main == entry_original) 827 entry_main = archive_entry_clone(entry_original); 828 #else 829 entry_main = archive_entry_clone(entry_original); 830 #endif 831 if (entry_main == NULL) { 832 archive_set_error(&a->archive, ENOMEM, 833 "Can't allocate pax data"); 834 return(ARCHIVE_FATAL); 835 } 836 archive_string_empty(&(pax->pax_header)); /* Blank our work area. */ 837 archive_string_empty(&(pax->sparse_map)); 838 sparse_total = 0; 839 sparse_list_clear(pax); 840 841 if (hardlink == NULL && 842 archive_entry_filetype(entry_main) == AE_IFREG) 843 sparse_count = archive_entry_sparse_reset(entry_main); 844 else 845 sparse_count = 0; 846 if (sparse_count) { 847 int64_t offset, length, last_offset = 0; 848 /* Get the last entry of sparse block. */ 849 while (archive_entry_sparse_next( 850 entry_main, &offset, &length) == ARCHIVE_OK) 851 last_offset = offset + length; 852 853 /* If the last sparse block does not reach the end of file, 854 * We have to add a empty sparse block as the last entry to 855 * manage storing file data. */ 856 if (last_offset < archive_entry_size(entry_main)) 857 archive_entry_sparse_add_entry(entry_main, 858 archive_entry_size(entry_main), 0); 859 sparse_count = archive_entry_sparse_reset(entry_main); 860 } 861 862 /* 863 * First, check the name fields and see if any of them 864 * require binary coding. If any of them does, then all of 865 * them do. 866 */ 867 r = get_entry_pathname(a, entry_main, &path, &path_length, sconv); 868 if (r == ARCHIVE_FATAL) { 869 archive_entry_free(entry_main); 870 return (r); 871 } else if (r != ARCHIVE_OK) { 872 r = get_entry_pathname(a, entry_main, &path, 873 &path_length, NULL); 874 if (r == ARCHIVE_FATAL) { 875 archive_entry_free(entry_main); 876 return (r); 877 } 878 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 879 "Can't translate pathname '%s' to %s", path, 880 archive_string_conversion_charset_name(sconv)); 881 ret = ARCHIVE_WARN; 882 sconv = NULL;/* The header charset switches to binary mode. */ 883 } 884 r = get_entry_uname(a, entry_main, &uname, &uname_length, sconv); 885 if (r == ARCHIVE_FATAL) { 886 archive_entry_free(entry_main); 887 return (r); 888 } else if (r != ARCHIVE_OK) { 889 r = get_entry_uname(a, entry_main, &uname, &uname_length, NULL); 890 if (r == ARCHIVE_FATAL) { 891 archive_entry_free(entry_main); 892 return (r); 893 } 894 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 895 "Can't translate uname '%s' to %s", uname, 896 archive_string_conversion_charset_name(sconv)); 897 ret = ARCHIVE_WARN; 898 sconv = NULL;/* The header charset switches to binary mode. */ 899 } 900 r = get_entry_gname(a, entry_main, &gname, &gname_length, sconv); 901 if (r == ARCHIVE_FATAL) { 902 archive_entry_free(entry_main); 903 return (r); 904 } else if (r != ARCHIVE_OK) { 905 r = get_entry_gname(a, entry_main, &gname, &gname_length, NULL); 906 if (r == ARCHIVE_FATAL) { 907 archive_entry_free(entry_main); 908 return (r); 909 } 910 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 911 "Can't translate gname '%s' to %s", gname, 912 archive_string_conversion_charset_name(sconv)); 913 ret = ARCHIVE_WARN; 914 sconv = NULL;/* The header charset switches to binary mode. */ 915 } 916 linkpath = hardlink; 917 linkpath_length = hardlink_length; 918 if (linkpath == NULL) { 919 r = get_entry_symlink(a, entry_main, &linkpath, 920 &linkpath_length, sconv); 921 if (r == ARCHIVE_FATAL) { 922 archive_entry_free(entry_main); 923 return (r); 924 } else if (r != ARCHIVE_OK) { 925 r = get_entry_symlink(a, entry_main, &linkpath, 926 &linkpath_length, NULL); 927 if (r == ARCHIVE_FATAL) { 928 archive_entry_free(entry_main); 929 return (r); 930 } 931 archive_set_error(&a->archive, 932 ARCHIVE_ERRNO_FILE_FORMAT, 933 "Can't translate linkname '%s' to %s", linkpath, 934 archive_string_conversion_charset_name(sconv)); 935 ret = ARCHIVE_WARN; 936 sconv = NULL; 937 } 938 } 939 940 /* If any string conversions failed, get all attributes 941 * in binary-mode. */ 942 if (sconv == NULL && !pax->opt_binary) { 943 if (hardlink != NULL) { 944 r = get_entry_hardlink(a, entry_main, &hardlink, 945 &hardlink_length, NULL); 946 if (r == ARCHIVE_FATAL) { 947 archive_entry_free(entry_main); 948 return (r); 949 } 950 linkpath = hardlink; 951 linkpath_length = hardlink_length; 952 } 953 r = get_entry_pathname(a, entry_main, &path, 954 &path_length, NULL); 955 if (r == ARCHIVE_FATAL) { 956 archive_entry_free(entry_main); 957 return (r); 958 } 959 r = get_entry_uname(a, entry_main, &uname, &uname_length, NULL); 960 if (r == ARCHIVE_FATAL) { 961 archive_entry_free(entry_main); 962 return (r); 963 } 964 r = get_entry_gname(a, entry_main, &gname, &gname_length, NULL); 965 if (r == ARCHIVE_FATAL) { 966 archive_entry_free(entry_main); 967 return (r); 968 } 969 } 970 971 /* Store the header encoding first, to be nice to readers. */ 972 if (sconv == NULL) 973 add_pax_attr(&(pax->pax_header), "hdrcharset", "BINARY"); 974 975 976 /* 977 * If name is too long, or has non-ASCII characters, add 978 * 'path' to pax extended attrs. (Note that an unconvertible 979 * name must have non-ASCII characters.) 980 */ 981 if (has_non_ASCII(path)) { 982 /* We have non-ASCII characters. */ 983 add_pax_attr(&(pax->pax_header), "path", path); 984 archive_entry_set_pathname(entry_main, 985 build_ustar_entry_name(ustar_entry_name, 986 path, path_length, NULL)); 987 need_extension = 1; 988 } else { 989 /* We have an all-ASCII path; we'd like to just store 990 * it in the ustar header if it will fit. Yes, this 991 * duplicates some of the logic in 992 * archive_write_set_format_ustar.c 993 */ 994 if (path_length <= 100) { 995 /* Fits in the old 100-char tar name field. */ 996 } else { 997 /* Find largest suffix that will fit. */ 998 /* Note: strlen() > 100, so strlen() - 100 - 1 >= 0 */ 999 suffix = strchr(path + path_length - 100 - 1, '/'); 1000 /* Don't attempt an empty prefix. */ 1001 if (suffix == path) 1002 suffix = strchr(suffix + 1, '/'); 1003 /* We can put it in the ustar header if it's 1004 * all ASCII and it's either <= 100 characters 1005 * or can be split at a '/' into a prefix <= 1006 * 155 chars and a suffix <= 100 chars. (Note 1007 * the strchr() above will return NULL exactly 1008 * when the path can't be split.) 1009 */ 1010 if (suffix == NULL /* Suffix > 100 chars. */ 1011 || suffix[1] == '\0' /* empty suffix */ 1012 || suffix - path > 155) /* Prefix > 155 chars */ 1013 { 1014 add_pax_attr(&(pax->pax_header), "path", path); 1015 archive_entry_set_pathname(entry_main, 1016 build_ustar_entry_name(ustar_entry_name, 1017 path, path_length, NULL)); 1018 need_extension = 1; 1019 } 1020 } 1021 } 1022 1023 if (linkpath != NULL) { 1024 /* If link name is too long or has non-ASCII characters, add 1025 * 'linkpath' to pax extended attrs. */ 1026 if (linkpath_length > 100 || has_non_ASCII(linkpath)) { 1027 add_pax_attr(&(pax->pax_header), "linkpath", linkpath); 1028 if (linkpath_length > 100) { 1029 if (hardlink != NULL) 1030 archive_entry_set_hardlink(entry_main, 1031 "././@LongHardLink"); 1032 else 1033 archive_entry_set_symlink(entry_main, 1034 "././@LongSymLink"); 1035 } 1036 need_extension = 1; 1037 } 1038 } 1039 /* Save a pathname since it will be renamed if `entry_main` has 1040 * sparse blocks. */ 1041 archive_string_init(&entry_name); 1042 archive_strcpy(&entry_name, archive_entry_pathname(entry_main)); 1043 1044 /* If file size is too large, we need pax extended attrs. */ 1045 if (archive_entry_size(entry_main) >= (((int64_t)1) << 33)) { 1046 need_extension = 1; 1047 } 1048 1049 /* If numeric GID is too large, add 'gid' to pax extended attrs. */ 1050 if ((unsigned int)archive_entry_gid(entry_main) >= (1 << 18)) { 1051 add_pax_attr_int(&(pax->pax_header), "gid", 1052 archive_entry_gid(entry_main)); 1053 need_extension = 1; 1054 } 1055 1056 /* If group name is too large or has non-ASCII characters, add 1057 * 'gname' to pax extended attrs. */ 1058 if (gname != NULL) { 1059 if (gname_length > 31 || has_non_ASCII(gname)) { 1060 add_pax_attr(&(pax->pax_header), "gname", gname); 1061 need_extension = 1; 1062 } 1063 } 1064 1065 /* If numeric UID is too large, add 'uid' to pax extended attrs. */ 1066 if ((unsigned int)archive_entry_uid(entry_main) >= (1 << 18)) { 1067 add_pax_attr_int(&(pax->pax_header), "uid", 1068 archive_entry_uid(entry_main)); 1069 need_extension = 1; 1070 } 1071 1072 /* Add 'uname' to pax extended attrs if necessary. */ 1073 if (uname != NULL) { 1074 if (uname_length > 31 || has_non_ASCII(uname)) { 1075 add_pax_attr(&(pax->pax_header), "uname", uname); 1076 need_extension = 1; 1077 } 1078 } 1079 1080 /* 1081 * POSIX/SUSv3 doesn't provide a standard key for large device 1082 * numbers. I use the same keys here that Joerg Schilling 1083 * used for 'star.' (Which, somewhat confusingly, are called 1084 * "devXXX" even though they code "rdev" values.) No doubt, 1085 * other implementations use other keys. Note that there's no 1086 * reason we can't write the same information into a number of 1087 * different keys. 1088 * 1089 * Of course, this is only needed for block or char device entries. 1090 */ 1091 if (archive_entry_filetype(entry_main) == AE_IFBLK 1092 || archive_entry_filetype(entry_main) == AE_IFCHR) { 1093 /* 1094 * If rdevmajor is too large, add 'SCHILY.devmajor' to 1095 * extended attributes. 1096 */ 1097 int rdevmajor, rdevminor; 1098 rdevmajor = archive_entry_rdevmajor(entry_main); 1099 rdevminor = archive_entry_rdevminor(entry_main); 1100 if (rdevmajor >= (1 << 18)) { 1101 add_pax_attr_int(&(pax->pax_header), "SCHILY.devmajor", 1102 rdevmajor); 1103 /* 1104 * Non-strict formatting below means we don't 1105 * have to truncate here. Not truncating improves 1106 * the chance that some more modern tar archivers 1107 * (such as GNU tar 1.13) can restore the full 1108 * value even if they don't understand the pax 1109 * extended attributes. See my rant below about 1110 * file size fields for additional details. 1111 */ 1112 /* archive_entry_set_rdevmajor(entry_main, 1113 rdevmajor & ((1 << 18) - 1)); */ 1114 need_extension = 1; 1115 } 1116 1117 /* 1118 * If devminor is too large, add 'SCHILY.devminor' to 1119 * extended attributes. 1120 */ 1121 if (rdevminor >= (1 << 18)) { 1122 add_pax_attr_int(&(pax->pax_header), "SCHILY.devminor", 1123 rdevminor); 1124 /* Truncation is not necessary here, either. */ 1125 /* archive_entry_set_rdevminor(entry_main, 1126 rdevminor & ((1 << 18) - 1)); */ 1127 need_extension = 1; 1128 } 1129 } 1130 1131 /* 1132 * Yes, this check is duplicated just below; this helps to 1133 * avoid writing an mtime attribute just to handle a 1134 * high-resolution timestamp in "restricted pax" mode. 1135 */ 1136 if (!need_extension && 1137 ((archive_entry_mtime(entry_main) < 0) 1138 || (archive_entry_mtime(entry_main) >= ustar_max_mtime))) 1139 need_extension = 1; 1140 1141 /* I use a star-compatible file flag attribute. */ 1142 p = archive_entry_fflags_text(entry_main); 1143 if (!need_extension && p != NULL && *p != '\0') 1144 need_extension = 1; 1145 1146 /* If there are extended attributes, we need an extension */ 1147 if (!need_extension && archive_entry_xattr_count(entry_original) > 0) 1148 need_extension = 1; 1149 1150 /* If there are sparse info, we need an extension */ 1151 if (!need_extension && sparse_count > 0) 1152 need_extension = 1; 1153 1154 acl_types = archive_entry_acl_types(entry_original); 1155 1156 /* If there are any ACL entries, we need an extension */ 1157 if (!need_extension && acl_types != 0) 1158 need_extension = 1; 1159 1160 /* If the symlink type is defined, we need an extension */ 1161 if (!need_extension && archive_entry_symlink_type(entry_main) > 0) 1162 need_extension = 1; 1163 1164 /* 1165 * Libarchive used to include these in extended headers for 1166 * restricted pax format, but that confused people who 1167 * expected ustar-like time semantics. So now we only include 1168 * them in full pax format. 1169 */ 1170 if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_RESTRICTED) { 1171 if (archive_entry_ctime(entry_main) != 0 || 1172 archive_entry_ctime_nsec(entry_main) != 0) 1173 add_pax_attr_time(&(pax->pax_header), "ctime", 1174 archive_entry_ctime(entry_main), 1175 archive_entry_ctime_nsec(entry_main)); 1176 1177 if (archive_entry_atime(entry_main) != 0 || 1178 archive_entry_atime_nsec(entry_main) != 0) 1179 add_pax_attr_time(&(pax->pax_header), "atime", 1180 archive_entry_atime(entry_main), 1181 archive_entry_atime_nsec(entry_main)); 1182 1183 /* Store birth/creationtime only if it's earlier than mtime */ 1184 if (archive_entry_birthtime_is_set(entry_main) && 1185 archive_entry_birthtime(entry_main) 1186 < archive_entry_mtime(entry_main)) 1187 add_pax_attr_time(&(pax->pax_header), 1188 "LIBARCHIVE.creationtime", 1189 archive_entry_birthtime(entry_main), 1190 archive_entry_birthtime_nsec(entry_main)); 1191 } 1192 1193 /* 1194 * The following items are handled differently in "pax 1195 * restricted" format. In particular, in "pax restricted" 1196 * format they won't be added unless need_extension is 1197 * already set (we're already generating an extended header, so 1198 * may as well include these). 1199 */ 1200 if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_RESTRICTED || 1201 need_extension) { 1202 if (archive_entry_mtime(entry_main) < 0 || 1203 archive_entry_mtime(entry_main) >= ustar_max_mtime || 1204 archive_entry_mtime_nsec(entry_main) != 0) 1205 add_pax_attr_time(&(pax->pax_header), "mtime", 1206 archive_entry_mtime(entry_main), 1207 archive_entry_mtime_nsec(entry_main)); 1208 1209 /* I use a star-compatible file flag attribute. */ 1210 p = archive_entry_fflags_text(entry_main); 1211 if (p != NULL && *p != '\0') 1212 add_pax_attr(&(pax->pax_header), "SCHILY.fflags", p); 1213 1214 /* I use star-compatible ACL attributes. */ 1215 if ((acl_types & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) { 1216 ret = add_pax_acl(a, entry_original, pax, 1217 ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID | 1218 ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA | 1219 ARCHIVE_ENTRY_ACL_STYLE_COMPACT); 1220 if (ret == ARCHIVE_FATAL) { 1221 archive_entry_free(entry_main); 1222 archive_string_free(&entry_name); 1223 return (ARCHIVE_FATAL); 1224 } 1225 } 1226 if (acl_types & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) { 1227 ret = add_pax_acl(a, entry_original, pax, 1228 ARCHIVE_ENTRY_ACL_TYPE_ACCESS | 1229 ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID | 1230 ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA); 1231 if (ret == ARCHIVE_FATAL) { 1232 archive_entry_free(entry_main); 1233 archive_string_free(&entry_name); 1234 return (ARCHIVE_FATAL); 1235 } 1236 } 1237 if (acl_types & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) { 1238 ret = add_pax_acl(a, entry_original, pax, 1239 ARCHIVE_ENTRY_ACL_TYPE_DEFAULT | 1240 ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID | 1241 ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA); 1242 if (ret == ARCHIVE_FATAL) { 1243 archive_entry_free(entry_main); 1244 archive_string_free(&entry_name); 1245 return (ARCHIVE_FATAL); 1246 } 1247 } 1248 1249 /* We use GNU-tar-compatible sparse attributes. */ 1250 if (sparse_count > 0) { 1251 int64_t soffset, slength; 1252 1253 add_pax_attr_int(&(pax->pax_header), 1254 "GNU.sparse.major", 1); 1255 add_pax_attr_int(&(pax->pax_header), 1256 "GNU.sparse.minor", 0); 1257 /* 1258 * Make sure to store the original path, since 1259 * truncation to ustar limit happened already. 1260 */ 1261 add_pax_attr(&(pax->pax_header), 1262 "GNU.sparse.name", path); 1263 add_pax_attr_int(&(pax->pax_header), 1264 "GNU.sparse.realsize", 1265 archive_entry_size(entry_main)); 1266 1267 /* Rename the file name which will be used for 1268 * ustar header to a special name, which GNU 1269 * PAX Format 1.0 requires */ 1270 archive_entry_set_pathname(entry_main, 1271 build_gnu_sparse_name(gnu_sparse_name, 1272 entry_name.s)); 1273 1274 /* 1275 * - Make a sparse map, which will precede a file data. 1276 * - Get the total size of available data of sparse. 1277 */ 1278 archive_string_sprintf(&(pax->sparse_map), "%d\n", 1279 sparse_count); 1280 while (archive_entry_sparse_next(entry_main, 1281 &soffset, &slength) == ARCHIVE_OK) { 1282 archive_string_sprintf(&(pax->sparse_map), 1283 "%jd\n%jd\n", 1284 (intmax_t)soffset, 1285 (intmax_t)slength); 1286 sparse_total += slength; 1287 if (sparse_list_add(pax, soffset, slength) 1288 != ARCHIVE_OK) { 1289 archive_set_error(&a->archive, 1290 ENOMEM, 1291 "Can't allocate memory"); 1292 archive_entry_free(entry_main); 1293 archive_string_free(&entry_name); 1294 return (ARCHIVE_FATAL); 1295 } 1296 } 1297 } 1298 1299 /* Store extended attributes */ 1300 if (archive_write_pax_header_xattrs(a, pax, entry_original) 1301 == ARCHIVE_FATAL) { 1302 archive_entry_free(entry_main); 1303 archive_string_free(&entry_name); 1304 return (ARCHIVE_FATAL); 1305 } 1306 1307 /* Store extended symlink information */ 1308 if (archive_entry_symlink_type(entry_main) == 1309 AE_SYMLINK_TYPE_FILE) { 1310 add_pax_attr(&(pax->pax_header), 1311 "LIBARCHIVE.symlinktype", "file"); 1312 } else if (archive_entry_symlink_type(entry_main) == 1313 AE_SYMLINK_TYPE_DIRECTORY) { 1314 add_pax_attr(&(pax->pax_header), 1315 "LIBARCHIVE.symlinktype", "dir"); 1316 } 1317 } 1318 1319 /* Only regular files have data. */ 1320 if (archive_entry_filetype(entry_main) != AE_IFREG) 1321 archive_entry_set_size(entry_main, 0); 1322 1323 /* 1324 * Pax-restricted does not store data for hardlinks, in order 1325 * to improve compatibility with ustar. 1326 */ 1327 if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE && 1328 hardlink != NULL) 1329 archive_entry_set_size(entry_main, 0); 1330 1331 /* 1332 * XXX Full pax interchange format does permit a hardlink 1333 * entry to have data associated with it. I'm not supporting 1334 * that here because the client expects me to tell them whether 1335 * or not this format expects data for hardlinks. If I 1336 * don't check here, then every pax archive will end up with 1337 * duplicated data for hardlinks. Someday, there may be 1338 * need to select this behavior, in which case the following 1339 * will need to be revisited. XXX 1340 */ 1341 if (hardlink != NULL) 1342 archive_entry_set_size(entry_main, 0); 1343 1344 /* Save a real file size. */ 1345 real_size = archive_entry_size(entry_main); 1346 /* 1347 * Overwrite a file size by the total size of sparse blocks and 1348 * the size of sparse map info. That file size is the length of 1349 * the data, which we will exactly store into an archive file. 1350 */ 1351 if (archive_strlen(&(pax->sparse_map))) { 1352 size_t mapsize = archive_strlen(&(pax->sparse_map)); 1353 pax->sparse_map_padding = 0x1ff & (-(ssize_t)mapsize); 1354 archive_entry_set_size(entry_main, 1355 mapsize + pax->sparse_map_padding + sparse_total); 1356 } 1357 1358 /* If file size is too large, add 'size' to pax extended attrs. */ 1359 if (archive_entry_size(entry_main) >= (((int64_t)1) << 33)) { 1360 add_pax_attr_int(&(pax->pax_header), "size", 1361 archive_entry_size(entry_main)); 1362 } 1363 1364 /* Format 'ustar' header for main entry. 1365 * 1366 * The trouble with file size: If the reader can't understand 1367 * the file size, they may not be able to locate the next 1368 * entry and the rest of the archive is toast. Pax-compliant 1369 * readers are supposed to ignore the file size in the main 1370 * header, so the question becomes how to maximize portability 1371 * for readers that don't support pax attribute extensions. 1372 * For maximum compatibility, I permit numeric extensions in 1373 * the main header so that the file size stored will always be 1374 * correct, even if it's in a format that only some 1375 * implementations understand. The technique used here is: 1376 * 1377 * a) If possible, follow the standard exactly. This handles 1378 * files up to 8 gigabytes minus 1. 1379 * 1380 * b) If that fails, try octal but omit the field terminator. 1381 * That handles files up to 64 gigabytes minus 1. 1382 * 1383 * c) Otherwise, use base-256 extensions. That handles files 1384 * up to 2^63 in this implementation, with the potential to 1385 * go up to 2^94. That should hold us for a while. ;-) 1386 * 1387 * The non-strict formatter uses similar logic for other 1388 * numeric fields, though they're less critical. 1389 */ 1390 if (__archive_write_format_header_ustar(a, ustarbuff, entry_main, -1, 0, 1391 NULL) == ARCHIVE_FATAL) { 1392 archive_entry_free(entry_main); 1393 archive_string_free(&entry_name); 1394 return (ARCHIVE_FATAL); 1395 } 1396 1397 /* If we built any extended attributes, write that entry first. */ 1398 if (archive_strlen(&(pax->pax_header)) > 0) { 1399 struct archive_entry *pax_attr_entry; 1400 time_t s; 1401 int64_t uid, gid; 1402 int mode; 1403 1404 pax_attr_entry = archive_entry_new2(&a->archive); 1405 p = entry_name.s; 1406 archive_entry_set_pathname(pax_attr_entry, 1407 build_pax_attribute_name(pax_entry_name, p)); 1408 archive_entry_set_size(pax_attr_entry, 1409 archive_strlen(&(pax->pax_header))); 1410 /* Copy uid/gid (but clip to ustar limits). */ 1411 uid = archive_entry_uid(entry_main); 1412 if (uid >= 1 << 18) 1413 uid = (1 << 18) - 1; 1414 archive_entry_set_uid(pax_attr_entry, uid); 1415 gid = archive_entry_gid(entry_main); 1416 if (gid >= 1 << 18) 1417 gid = (1 << 18) - 1; 1418 archive_entry_set_gid(pax_attr_entry, gid); 1419 /* Copy mode over (but not setuid/setgid bits) */ 1420 mode = archive_entry_mode(entry_main); 1421 #ifdef S_ISUID 1422 mode &= ~S_ISUID; 1423 #endif 1424 #ifdef S_ISGID 1425 mode &= ~S_ISGID; 1426 #endif 1427 #ifdef S_ISVTX 1428 mode &= ~S_ISVTX; 1429 #endif 1430 archive_entry_set_mode(pax_attr_entry, mode); 1431 1432 /* Copy uname/gname. */ 1433 archive_entry_set_uname(pax_attr_entry, 1434 archive_entry_uname(entry_main)); 1435 archive_entry_set_gname(pax_attr_entry, 1436 archive_entry_gname(entry_main)); 1437 1438 /* Copy mtime, but clip to ustar limits. */ 1439 s = archive_entry_mtime(entry_main); 1440 if (s < 0) { s = 0; } 1441 if (s > ustar_max_mtime) { s = ustar_max_mtime; } 1442 archive_entry_set_mtime(pax_attr_entry, s, 0); 1443 1444 /* Standard ustar doesn't support atime. */ 1445 archive_entry_set_atime(pax_attr_entry, 0, 0); 1446 1447 /* Standard ustar doesn't support ctime. */ 1448 archive_entry_set_ctime(pax_attr_entry, 0, 0); 1449 1450 r = __archive_write_format_header_ustar(a, paxbuff, 1451 pax_attr_entry, 'x', 1, NULL); 1452 1453 archive_entry_free(pax_attr_entry); 1454 1455 /* Note that the 'x' header shouldn't ever fail to format */ 1456 if (r < ARCHIVE_WARN) { 1457 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1458 "archive_write_pax_header: " 1459 "'x' header failed?! This can't happen.\n"); 1460 archive_entry_free(entry_main); 1461 archive_string_free(&entry_name); 1462 return (ARCHIVE_FATAL); 1463 } else if (r < ret) 1464 ret = r; 1465 r = __archive_write_output(a, paxbuff, 512); 1466 if (r != ARCHIVE_OK) { 1467 sparse_list_clear(pax); 1468 pax->entry_bytes_remaining = 0; 1469 pax->entry_padding = 0; 1470 archive_entry_free(entry_main); 1471 archive_string_free(&entry_name); 1472 return (ARCHIVE_FATAL); 1473 } 1474 1475 pax->entry_bytes_remaining = archive_strlen(&(pax->pax_header)); 1476 pax->entry_padding = 1477 0x1ff & (-(int64_t)pax->entry_bytes_remaining); 1478 1479 r = __archive_write_output(a, pax->pax_header.s, 1480 archive_strlen(&(pax->pax_header))); 1481 if (r != ARCHIVE_OK) { 1482 /* If a write fails, we're pretty much toast. */ 1483 archive_entry_free(entry_main); 1484 archive_string_free(&entry_name); 1485 return (ARCHIVE_FATAL); 1486 } 1487 /* Pad out the end of the entry. */ 1488 r = __archive_write_nulls(a, (size_t)pax->entry_padding); 1489 if (r != ARCHIVE_OK) { 1490 /* If a write fails, we're pretty much toast. */ 1491 archive_entry_free(entry_main); 1492 archive_string_free(&entry_name); 1493 return (ARCHIVE_FATAL); 1494 } 1495 pax->entry_bytes_remaining = pax->entry_padding = 0; 1496 } 1497 1498 /* Write the header for main entry. */ 1499 r = __archive_write_output(a, ustarbuff, 512); 1500 if (r != ARCHIVE_OK) { 1501 archive_entry_free(entry_main); 1502 archive_string_free(&entry_name); 1503 return (r); 1504 } 1505 1506 /* 1507 * Inform the client of the on-disk size we're using, so 1508 * they can avoid unnecessarily writing a body for something 1509 * that we're just going to ignore. 1510 */ 1511 archive_entry_set_size(entry_original, real_size); 1512 if (pax->sparse_list == NULL && real_size > 0) { 1513 /* This is not a sparse file but we handle its data as 1514 * a sparse block. */ 1515 sparse_list_add(pax, 0, real_size); 1516 sparse_total = real_size; 1517 } 1518 pax->entry_padding = 0x1ff & (-(int64_t)sparse_total); 1519 archive_entry_free(entry_main); 1520 archive_string_free(&entry_name); 1521 1522 return (ret); 1523 } 1524 1525 /* 1526 * We need a valid name for the regular 'ustar' entry. This routine 1527 * tries to hack something more-or-less reasonable. 1528 * 1529 * The approach here tries to preserve leading dir names. We do so by 1530 * working with four sections: 1531 * 1) "prefix" directory names, 1532 * 2) "suffix" directory names, 1533 * 3) inserted dir name (optional), 1534 * 4) filename. 1535 * 1536 * These sections must satisfy the following requirements: 1537 * * Parts 1 & 2 together form an initial portion of the dir name. 1538 * * Part 3 is specified by the caller. (It should not contain a leading 1539 * or trailing '/'.) 1540 * * Part 4 forms an initial portion of the base filename. 1541 * * The filename must be <= 99 chars to fit the ustar 'name' field. 1542 * * Parts 2, 3, 4 together must be <= 99 chars to fit the ustar 'name' fld. 1543 * * Part 1 must be <= 155 chars to fit the ustar 'prefix' field. 1544 * * If the original name ends in a '/', the new name must also end in a '/' 1545 * * Trailing '/.' sequences may be stripped. 1546 * 1547 * Note: Recall that the ustar format does not store the '/' separating 1548 * parts 1 & 2, but does store the '/' separating parts 2 & 3. 1549 */ 1550 static char * 1551 build_ustar_entry_name(char *dest, const char *src, size_t src_length, 1552 const char *insert) 1553 { 1554 const char *prefix, *prefix_end; 1555 const char *suffix, *suffix_end; 1556 const char *filename, *filename_end; 1557 char *p; 1558 int need_slash = 0; /* Was there a trailing slash? */ 1559 size_t suffix_length = 99; 1560 size_t insert_length; 1561 1562 /* Length of additional dir element to be added. */ 1563 if (insert == NULL) 1564 insert_length = 0; 1565 else 1566 /* +2 here allows for '/' before and after the insert. */ 1567 insert_length = strlen(insert) + 2; 1568 1569 /* Step 0: Quick bailout in a common case. */ 1570 if (src_length < 100 && insert == NULL) { 1571 strncpy(dest, src, src_length); 1572 dest[src_length] = '\0'; 1573 return (dest); 1574 } 1575 1576 /* Step 1: Locate filename and enforce the length restriction. */ 1577 filename_end = src + src_length; 1578 /* Remove trailing '/' chars and '/.' pairs. */ 1579 for (;;) { 1580 if (filename_end > src && filename_end[-1] == '/') { 1581 filename_end --; 1582 need_slash = 1; /* Remember to restore trailing '/'. */ 1583 continue; 1584 } 1585 if (filename_end > src + 1 && filename_end[-1] == '.' 1586 && filename_end[-2] == '/') { 1587 filename_end -= 2; 1588 need_slash = 1; /* "foo/." will become "foo/" */ 1589 continue; 1590 } 1591 break; 1592 } 1593 if (need_slash) 1594 suffix_length--; 1595 /* Find start of filename. */ 1596 filename = filename_end - 1; 1597 while ((filename > src) && (*filename != '/')) 1598 filename --; 1599 if ((*filename == '/') && (filename < filename_end - 1)) 1600 filename ++; 1601 /* Adjust filename_end so that filename + insert fits in 99 chars. */ 1602 suffix_length -= insert_length; 1603 if (filename_end > filename + suffix_length) 1604 filename_end = filename + suffix_length; 1605 /* Calculate max size for "suffix" section (#3 above). */ 1606 suffix_length -= filename_end - filename; 1607 1608 /* Step 2: Locate the "prefix" section of the dirname, including 1609 * trailing '/'. */ 1610 prefix = src; 1611 prefix_end = prefix + 155; 1612 if (prefix_end > filename) 1613 prefix_end = filename; 1614 while (prefix_end > prefix && *prefix_end != '/') 1615 prefix_end--; 1616 if ((prefix_end < filename) && (*prefix_end == '/')) 1617 prefix_end++; 1618 1619 /* Step 3: Locate the "suffix" section of the dirname, 1620 * including trailing '/'. */ 1621 suffix = prefix_end; 1622 suffix_end = suffix + suffix_length; /* Enforce limit. */ 1623 if (suffix_end > filename) 1624 suffix_end = filename; 1625 if (suffix_end < suffix) 1626 suffix_end = suffix; 1627 while (suffix_end > suffix && *suffix_end != '/') 1628 suffix_end--; 1629 if ((suffix_end < filename) && (*suffix_end == '/')) 1630 suffix_end++; 1631 1632 /* Step 4: Build the new name. */ 1633 /* The OpenBSD strlcpy function is safer, but less portable. */ 1634 /* Rather than maintain two versions, just use the strncpy version. */ 1635 p = dest; 1636 if (prefix_end > prefix) { 1637 strncpy(p, prefix, prefix_end - prefix); 1638 p += prefix_end - prefix; 1639 } 1640 if (suffix_end > suffix) { 1641 strncpy(p, suffix, suffix_end - suffix); 1642 p += suffix_end - suffix; 1643 } 1644 if (insert != NULL) { 1645 /* Note: assume insert does not have leading or trailing '/' */ 1646 strcpy(p, insert); 1647 p += strlen(insert); 1648 *p++ = '/'; 1649 } 1650 strncpy(p, filename, filename_end - filename); 1651 p += filename_end - filename; 1652 if (need_slash) 1653 *p++ = '/'; 1654 *p = '\0'; 1655 1656 return (dest); 1657 } 1658 1659 /* 1660 * The ustar header for the pax extended attributes must have a 1661 * reasonable name: SUSv3 requires 'dirname'/PaxHeader.'pid'/'filename' 1662 * where 'pid' is the PID of the archiving process. Unfortunately, 1663 * that makes testing a pain since the output varies for each run, 1664 * so I'm sticking with the simpler 'dirname'/PaxHeader/'filename' 1665 * for now. (Someday, I'll make this settable. Then I can use the 1666 * SUS recommendation as default and test harnesses can override it 1667 * to get predictable results.) 1668 * 1669 * Joerg Schilling has argued that this is unnecessary because, in 1670 * practice, if the pax extended attributes get extracted as regular 1671 * files, no one is going to bother reading those attributes to 1672 * manually restore them. Based on this, 'star' uses 1673 * /tmp/PaxHeader/'basename' as the ustar header name. This is a 1674 * tempting argument, in part because it's simpler than the SUSv3 1675 * recommendation, but I'm not entirely convinced. I'm also 1676 * uncomfortable with the fact that "/tmp" is a Unix-ism. 1677 * 1678 * The following routine leverages build_ustar_entry_name() above and 1679 * so is simpler than you might think. It just needs to provide the 1680 * additional path element and handle a few pathological cases). 1681 */ 1682 static char * 1683 build_pax_attribute_name(char *dest, const char *src) 1684 { 1685 char buff[64]; 1686 const char *p; 1687 1688 /* Handle the null filename case. */ 1689 if (src == NULL || *src == '\0') { 1690 strcpy(dest, "PaxHeader/blank"); 1691 return (dest); 1692 } 1693 1694 /* Prune final '/' and other unwanted final elements. */ 1695 p = src + strlen(src); 1696 for (;;) { 1697 /* Ends in "/", remove the '/' */ 1698 if (p > src && p[-1] == '/') { 1699 --p; 1700 continue; 1701 } 1702 /* Ends in "/.", remove the '.' */ 1703 if (p > src + 1 && p[-1] == '.' 1704 && p[-2] == '/') { 1705 --p; 1706 continue; 1707 } 1708 break; 1709 } 1710 1711 /* Pathological case: After above, there was nothing left. 1712 * This includes "/." "/./." "/.//./." etc. */ 1713 if (p == src) { 1714 strcpy(dest, "/PaxHeader/rootdir"); 1715 return (dest); 1716 } 1717 1718 /* Convert unadorned "." into a suitable filename. */ 1719 if (*src == '.' && p == src + 1) { 1720 strcpy(dest, "PaxHeader/currentdir"); 1721 return (dest); 1722 } 1723 1724 /* 1725 * TODO: Push this string into the 'pax' structure to avoid 1726 * recomputing it every time. That will also open the door 1727 * to having clients override it. 1728 */ 1729 #if HAVE_GETPID && 0 /* Disable this for now; see above comment. */ 1730 snprintf(buff, sizeof(buff), "PaxHeader.%d", getpid()); 1731 #else 1732 /* If the platform can't fetch the pid, don't include it. */ 1733 strcpy(buff, "PaxHeader"); 1734 #endif 1735 /* General case: build a ustar-compatible name adding 1736 * "/PaxHeader/". */ 1737 build_ustar_entry_name(dest, src, p - src, buff); 1738 1739 return (dest); 1740 } 1741 1742 /* 1743 * GNU PAX Format 1.0 requires the special name, which pattern is: 1744 * <dir>/GNUSparseFile.<pid>/<original file name> 1745 * 1746 * Since reproducible archives are more important, use 0 as pid. 1747 * 1748 * This function is used for only Sparse file, a file type of which 1749 * is regular file. 1750 */ 1751 static char * 1752 build_gnu_sparse_name(char *dest, const char *src) 1753 { 1754 const char *p; 1755 1756 /* Handle the null filename case. */ 1757 if (src == NULL || *src == '\0') { 1758 strcpy(dest, "GNUSparseFile/blank"); 1759 return (dest); 1760 } 1761 1762 /* Prune final '/' and other unwanted final elements. */ 1763 p = src + strlen(src); 1764 for (;;) { 1765 /* Ends in "/", remove the '/' */ 1766 if (p > src && p[-1] == '/') { 1767 --p; 1768 continue; 1769 } 1770 /* Ends in "/.", remove the '.' */ 1771 if (p > src + 1 && p[-1] == '.' 1772 && p[-2] == '/') { 1773 --p; 1774 continue; 1775 } 1776 break; 1777 } 1778 1779 /* General case: build a ustar-compatible name adding 1780 * "/GNUSparseFile/". */ 1781 build_ustar_entry_name(dest, src, p - src, "GNUSparseFile.0"); 1782 1783 return (dest); 1784 } 1785 1786 /* Write two null blocks for the end of archive */ 1787 static int 1788 archive_write_pax_close(struct archive_write *a) 1789 { 1790 return (__archive_write_nulls(a, 512 * 2)); 1791 } 1792 1793 static int 1794 archive_write_pax_free(struct archive_write *a) 1795 { 1796 struct pax *pax; 1797 1798 pax = (struct pax *)a->format_data; 1799 if (pax == NULL) 1800 return (ARCHIVE_OK); 1801 1802 archive_string_free(&pax->pax_header); 1803 archive_string_free(&pax->sparse_map); 1804 archive_string_free(&pax->l_url_encoded_name); 1805 sparse_list_clear(pax); 1806 free(pax); 1807 a->format_data = NULL; 1808 return (ARCHIVE_OK); 1809 } 1810 1811 static int 1812 archive_write_pax_finish_entry(struct archive_write *a) 1813 { 1814 struct pax *pax; 1815 uint64_t remaining; 1816 int ret; 1817 1818 pax = (struct pax *)a->format_data; 1819 remaining = pax->entry_bytes_remaining; 1820 if (remaining == 0) { 1821 while (pax->sparse_list) { 1822 struct sparse_block *sb; 1823 if (!pax->sparse_list->is_hole) 1824 remaining += pax->sparse_list->remaining; 1825 sb = pax->sparse_list->next; 1826 free(pax->sparse_list); 1827 pax->sparse_list = sb; 1828 } 1829 } 1830 ret = __archive_write_nulls(a, (size_t)(remaining + pax->entry_padding)); 1831 pax->entry_bytes_remaining = pax->entry_padding = 0; 1832 return (ret); 1833 } 1834 1835 static ssize_t 1836 archive_write_pax_data(struct archive_write *a, const void *buff, size_t s) 1837 { 1838 struct pax *pax; 1839 size_t ws; 1840 size_t total; 1841 int ret; 1842 1843 pax = (struct pax *)a->format_data; 1844 1845 /* 1846 * According to GNU PAX format 1.0, write a sparse map 1847 * before the body. 1848 */ 1849 if (archive_strlen(&(pax->sparse_map))) { 1850 ret = __archive_write_output(a, pax->sparse_map.s, 1851 archive_strlen(&(pax->sparse_map))); 1852 if (ret != ARCHIVE_OK) 1853 return (ret); 1854 ret = __archive_write_nulls(a, pax->sparse_map_padding); 1855 if (ret != ARCHIVE_OK) 1856 return (ret); 1857 archive_string_empty(&(pax->sparse_map)); 1858 } 1859 1860 total = 0; 1861 while (total < s) { 1862 const unsigned char *p; 1863 1864 while (pax->sparse_list != NULL && 1865 pax->sparse_list->remaining == 0) { 1866 struct sparse_block *sb = pax->sparse_list->next; 1867 free(pax->sparse_list); 1868 pax->sparse_list = sb; 1869 } 1870 1871 if (pax->sparse_list == NULL) 1872 return (total); 1873 1874 p = ((const unsigned char *)buff) + total; 1875 ws = s - total; 1876 if (ws > pax->sparse_list->remaining) 1877 ws = (size_t)pax->sparse_list->remaining; 1878 1879 if (pax->sparse_list->is_hole) { 1880 /* Current block is hole thus we do not write 1881 * the body. */ 1882 pax->sparse_list->remaining -= ws; 1883 total += ws; 1884 continue; 1885 } 1886 1887 ret = __archive_write_output(a, p, ws); 1888 pax->sparse_list->remaining -= ws; 1889 total += ws; 1890 if (ret != ARCHIVE_OK) 1891 return (ret); 1892 } 1893 return (total); 1894 } 1895 1896 static int 1897 has_non_ASCII(const char *_p) 1898 { 1899 const unsigned char *p = (const unsigned char *)_p; 1900 1901 if (p == NULL) 1902 return (1); 1903 while (*p != '\0' && *p < 128) 1904 p++; 1905 return (*p != '\0'); 1906 } 1907 1908 /* 1909 * Used by extended attribute support; encodes the name 1910 * so that there will be no '=' characters in the result. 1911 */ 1912 static char * 1913 url_encode(const char *in) 1914 { 1915 const char *s; 1916 char *d; 1917 size_t out_len = 0; 1918 char *out; 1919 1920 for (s = in; *s != '\0'; s++) { 1921 if (*s < 33 || *s > 126 || *s == '%' || *s == '=') { 1922 if (SIZE_MAX - out_len < 4) 1923 return (NULL); 1924 out_len += 3; 1925 } else { 1926 if (SIZE_MAX - out_len < 2) 1927 return (NULL); 1928 out_len++; 1929 } 1930 } 1931 1932 out = (char *)malloc(out_len + 1); 1933 if (out == NULL) 1934 return (NULL); 1935 1936 for (s = in, d = out; *s != '\0'; s++) { 1937 /* encode any non-printable ASCII character or '%' or '=' */ 1938 if (*s < 33 || *s > 126 || *s == '%' || *s == '=') { 1939 /* URL encoding is '%' followed by two hex digits */ 1940 *d++ = '%'; 1941 *d++ = "0123456789ABCDEF"[0x0f & (*s >> 4)]; 1942 *d++ = "0123456789ABCDEF"[0x0f & *s]; 1943 } else { 1944 *d++ = *s; 1945 } 1946 } 1947 *d = '\0'; 1948 return (out); 1949 } 1950 1951 /* 1952 * Encode a sequence of bytes into a C string using base-64 encoding. 1953 * 1954 * Returns a null-terminated C string allocated with malloc(); caller 1955 * is responsible for freeing the result. 1956 */ 1957 static char * 1958 base64_encode(const char *s, size_t len) 1959 { 1960 static const char digits[64] = 1961 { 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O', 1962 'P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d', 1963 'e','f','g','h','i','j','k','l','m','n','o','p','q','r','s', 1964 't','u','v','w','x','y','z','0','1','2','3','4','5','6','7', 1965 '8','9','+','/' }; 1966 int v; 1967 char *d, *out; 1968 1969 /* 3 bytes becomes 4 chars, but round up and allow for trailing NUL */ 1970 out = (char *)malloc((len * 4 + 2) / 3 + 1); 1971 if (out == NULL) 1972 return (NULL); 1973 d = out; 1974 1975 /* Convert each group of 3 bytes into 4 characters. */ 1976 while (len >= 3) { 1977 v = (((int)s[0] << 16) & 0xff0000) 1978 | (((int)s[1] << 8) & 0xff00) 1979 | (((int)s[2]) & 0x00ff); 1980 s += 3; 1981 len -= 3; 1982 *d++ = digits[(v >> 18) & 0x3f]; 1983 *d++ = digits[(v >> 12) & 0x3f]; 1984 *d++ = digits[(v >> 6) & 0x3f]; 1985 *d++ = digits[(v) & 0x3f]; 1986 } 1987 /* Handle final group of 1 byte (2 chars) or 2 bytes (3 chars). */ 1988 switch (len) { 1989 case 0: break; 1990 case 1: 1991 v = (((int)s[0] << 16) & 0xff0000); 1992 *d++ = digits[(v >> 18) & 0x3f]; 1993 *d++ = digits[(v >> 12) & 0x3f]; 1994 break; 1995 case 2: 1996 v = (((int)s[0] << 16) & 0xff0000) 1997 | (((int)s[1] << 8) & 0xff00); 1998 *d++ = digits[(v >> 18) & 0x3f]; 1999 *d++ = digits[(v >> 12) & 0x3f]; 2000 *d++ = digits[(v >> 6) & 0x3f]; 2001 break; 2002 } 2003 /* Add trailing NUL character so output is a valid C string. */ 2004 *d = '\0'; 2005 return (out); 2006 } 2007 2008 static void 2009 sparse_list_clear(struct pax *pax) 2010 { 2011 while (pax->sparse_list != NULL) { 2012 struct sparse_block *sb = pax->sparse_list; 2013 pax->sparse_list = sb->next; 2014 free(sb); 2015 } 2016 pax->sparse_tail = NULL; 2017 } 2018 2019 static int 2020 _sparse_list_add_block(struct pax *pax, int64_t offset, int64_t length, 2021 int is_hole) 2022 { 2023 struct sparse_block *sb; 2024 2025 sb = (struct sparse_block *)malloc(sizeof(*sb)); 2026 if (sb == NULL) 2027 return (ARCHIVE_FATAL); 2028 sb->next = NULL; 2029 sb->is_hole = is_hole; 2030 sb->offset = offset; 2031 sb->remaining = length; 2032 if (pax->sparse_list == NULL || pax->sparse_tail == NULL) 2033 pax->sparse_list = pax->sparse_tail = sb; 2034 else { 2035 pax->sparse_tail->next = sb; 2036 pax->sparse_tail = sb; 2037 } 2038 return (ARCHIVE_OK); 2039 } 2040 2041 static int 2042 sparse_list_add(struct pax *pax, int64_t offset, int64_t length) 2043 { 2044 int64_t last_offset; 2045 int r; 2046 2047 if (pax->sparse_tail == NULL) 2048 last_offset = 0; 2049 else { 2050 last_offset = pax->sparse_tail->offset + 2051 pax->sparse_tail->remaining; 2052 } 2053 if (last_offset < offset) { 2054 /* Add a hole block. */ 2055 r = _sparse_list_add_block(pax, last_offset, 2056 offset - last_offset, 1); 2057 if (r != ARCHIVE_OK) 2058 return (r); 2059 } 2060 /* Add data block. */ 2061 return (_sparse_list_add_block(pax, offset, length, 0)); 2062 } 2063 2064 static time_t 2065 get_ustar_max_mtime(void) 2066 { 2067 /* 2068 * Technically, the mtime field in the ustar header can 2069 * support 33 bits. We are using all of them to keep 2070 * tar/test/test_option_C_mtree.c simple and passing after 2038. 2071 * For platforms that use signed 32-bit time values we 2072 * use the 32-bit maximum. 2073 */ 2074 if (sizeof(time_t) > sizeof(int32_t)) 2075 return (time_t)0x1ffffffff; 2076 else 2077 return (time_t)0x7fffffff; 2078 } 2079