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 30#ifdef HAVE_ERRNO_H 31#include <errno.h> 32#endif 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 47struct sparse_block { 48 struct sparse_block *next; 49 int is_hole; 50 uint64_t offset; 51 uint64_t remaining; 52}; 53 54struct pax { 55 uint64_t entry_bytes_remaining; 56 uint64_t entry_padding; 57 struct archive_string l_url_encoded_name; 58 struct archive_string pax_header; 59 struct archive_string sparse_map; 60 size_t sparse_map_padding; 61 struct sparse_block *sparse_list; 62 struct sparse_block *sparse_tail; 63 struct archive_string_conv *sconv_utf8; 64 int opt_binary; 65 66 unsigned flags; 67#define WRITE_SCHILY_XATTR (1 << 0) 68#define WRITE_LIBARCHIVE_XATTR (1 << 1) 69}; 70 71static void add_pax_attr(struct archive_string *, const char *key, 72 const char *value); 73static void add_pax_attr_binary(struct archive_string *, 74 const char *key, 75 const char *value, size_t value_len); 76static void add_pax_attr_int(struct archive_string *, 77 const char *key, int64_t value); 78static void add_pax_attr_time(struct archive_string *, 79 const char *key, int64_t sec, 80 unsigned long nanos); 81static int add_pax_acl(struct archive_write *, 82 struct archive_entry *, struct pax *, int); 83static ssize_t archive_write_pax_data(struct archive_write *, 84 const void *, size_t); 85static int archive_write_pax_close(struct archive_write *); 86static int archive_write_pax_free(struct archive_write *); 87static int archive_write_pax_finish_entry(struct archive_write *); 88static int archive_write_pax_header(struct archive_write *, 89 struct archive_entry *); 90static int archive_write_pax_options(struct archive_write *, 91 const char *, const char *); 92static char *base64_encode(const char *src, size_t len); 93static char *build_gnu_sparse_name(char *dest, const char *src); 94static char *build_pax_attribute_name(char *dest, const char *src); 95static char *build_ustar_entry_name(char *dest, const char *src, 96 size_t src_length, const char *insert); 97static char *format_int(char *dest, int64_t); 98static int has_non_ASCII(const char *); 99static void sparse_list_clear(struct pax *); 100static int sparse_list_add(struct pax *, int64_t, int64_t); 101static char *url_encode(const char *in); 102static time_t get_ustar_max_mtime(void); 103 104/* 105 * Set output format to 'restricted pax' format. 106 * 107 * This is the same as normal 'pax', but tries to suppress 108 * the pax header whenever possible. This is the default for 109 * bsdtar, for instance. 110 */ 111int 112archive_write_set_format_pax_restricted(struct archive *_a) 113{ 114 struct archive_write *a = (struct archive_write *)_a; 115 int r; 116 117 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 118 ARCHIVE_STATE_NEW, "archive_write_set_format_pax_restricted"); 119 120 r = archive_write_set_format_pax(&a->archive); 121 a->archive.archive_format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 122 a->archive.archive_format_name = "restricted POSIX pax interchange"; 123 return (r); 124} 125 126/* 127 * Set output format to 'pax' format. 128 */ 129int 130archive_write_set_format_pax(struct archive *_a) 131{ 132 struct archive_write *a = (struct archive_write *)_a; 133 struct pax *pax; 134 135 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 136 ARCHIVE_STATE_NEW, "archive_write_set_format_pax"); 137 138 if (a->format_free != NULL) 139 (a->format_free)(a); 140 141 pax = (struct pax *)calloc(1, sizeof(*pax)); 142 if (pax == NULL) { 143 archive_set_error(&a->archive, ENOMEM, 144 "Can't allocate pax data"); 145 return (ARCHIVE_FATAL); 146 } 147 pax->flags = WRITE_LIBARCHIVE_XATTR | WRITE_SCHILY_XATTR; 148 149 a->format_data = pax; 150 a->format_name = "pax"; 151 a->format_options = archive_write_pax_options; 152 a->format_write_header = archive_write_pax_header; 153 a->format_write_data = archive_write_pax_data; 154 a->format_close = archive_write_pax_close; 155 a->format_free = archive_write_pax_free; 156 a->format_finish_entry = archive_write_pax_finish_entry; 157 a->archive.archive_format = ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE; 158 a->archive.archive_format_name = "POSIX pax interchange"; 159 return (ARCHIVE_OK); 160} 161 162static int 163archive_write_pax_options(struct archive_write *a, const char *key, 164 const char *val) 165{ 166 struct pax *pax = (struct pax *)a->format_data; 167 int ret = ARCHIVE_FAILED; 168 169 if (strcmp(key, "hdrcharset") == 0) { 170 /* 171 * The character-set we can use are defined in 172 * IEEE Std 1003.1-2001 173 */ 174 if (val == NULL || val[0] == 0) 175 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 176 "pax: hdrcharset option needs a character-set name"); 177 else if (strcmp(val, "BINARY") == 0 || 178 strcmp(val, "binary") == 0) { 179 /* 180 * Specify binary mode. We will not convert 181 * filenames, uname and gname to any charsets. 182 */ 183 pax->opt_binary = 1; 184 ret = ARCHIVE_OK; 185 } else if (strcmp(val, "UTF-8") == 0) { 186 /* 187 * Specify UTF-8 character-set to be used for 188 * filenames. This is almost the test that 189 * running platform supports the string conversion. 190 * Especially libarchive_test needs this trick for 191 * its test. 192 */ 193 pax->sconv_utf8 = archive_string_conversion_to_charset( 194 &(a->archive), "UTF-8", 0); 195 if (pax->sconv_utf8 == NULL) 196 ret = ARCHIVE_FATAL; 197 else 198 ret = ARCHIVE_OK; 199 } else 200 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 201 "pax: invalid charset name"); 202 return (ret); 203 } else if (strcmp(key, "xattrheader") == 0) { 204 if (val == NULL || val[0] == 0) { 205 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 206 "pax: xattrheader requires a value"); 207 } else if (strcmp(val, "ALL") == 0 || 208 strcmp(val, "all") == 0) { 209 pax->flags |= WRITE_LIBARCHIVE_XATTR | WRITE_SCHILY_XATTR; 210 ret = ARCHIVE_OK; 211 } else if (strcmp(val, "SCHILY") == 0 || 212 strcmp(val, "schily") == 0) { 213 pax->flags |= WRITE_SCHILY_XATTR; 214 pax->flags &= ~WRITE_LIBARCHIVE_XATTR; 215 ret = ARCHIVE_OK; 216 } else if (strcmp(val, "LIBARCHIVE") == 0 || 217 strcmp(val, "libarchive") == 0) { 218 pax->flags |= WRITE_LIBARCHIVE_XATTR; 219 pax->flags &= ~WRITE_SCHILY_XATTR; 220 ret = ARCHIVE_OK; 221 } else 222 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 223 "pax: invalid xattr header name"); 224 return (ret); 225 } 226 227 /* Note: The "warn" return is just to inform the options 228 * supervisor that we didn't handle it. It will generate 229 * a suitable error if no one used this option. */ 230 return (ARCHIVE_WARN); 231} 232 233/* 234 * Note: This code assumes that 'nanos' has the same sign as 'sec', 235 * which implies that sec=-1, nanos=200000000 represents -1.2 seconds 236 * and not -0.8 seconds. This is a pretty pedantic point, as we're 237 * unlikely to encounter many real files created before Jan 1, 1970, 238 * much less ones with timestamps recorded to sub-second resolution. 239 */ 240static void 241add_pax_attr_time(struct archive_string *as, const char *key, 242 int64_t sec, unsigned long nanos) 243{ 244 int digit, i; 245 char *t; 246 /* 247 * Note that each byte contributes fewer than 3 base-10 248 * digits, so this will always be big enough. 249 */ 250 char tmp[1 + 3*sizeof(sec) + 1 + 3*sizeof(nanos)]; 251 252 tmp[sizeof(tmp) - 1] = 0; 253 t = tmp + sizeof(tmp) - 1; 254 255 /* Skip trailing zeros in the fractional part. */ 256 for (digit = 0, i = 10; i > 0 && digit == 0; i--) { 257 digit = nanos % 10; 258 nanos /= 10; 259 } 260 261 /* Only format the fraction if it's non-zero. */ 262 if (i > 0) { 263 while (i > 0) { 264 *--t = "0123456789"[digit]; 265 digit = nanos % 10; 266 nanos /= 10; 267 i--; 268 } 269 *--t = '.'; 270 } 271 t = format_int(t, sec); 272 273 add_pax_attr(as, key, t); 274} 275 276static char * 277format_int(char *t, int64_t i) 278{ 279 uint64_t ui; 280 281 if (i < 0) 282 ui = (i == INT64_MIN) ? (uint64_t)(INT64_MAX) + 1 : (uint64_t)(-i); 283 else 284 ui = i; 285 286 do { 287 *--t = "0123456789"[ui % 10]; 288 } while (ui /= 10); 289 if (i < 0) 290 *--t = '-'; 291 return (t); 292} 293 294static void 295add_pax_attr_int(struct archive_string *as, const char *key, int64_t value) 296{ 297 char tmp[1 + 3 * sizeof(value)]; 298 299 tmp[sizeof(tmp) - 1] = 0; 300 add_pax_attr(as, key, format_int(tmp + sizeof(tmp) - 1, value)); 301} 302 303/* 304 * Add a key/value attribute to the pax header. This function handles 305 * the length field and various other syntactic requirements. 306 */ 307static void 308add_pax_attr(struct archive_string *as, const char *key, const char *value) 309{ 310 add_pax_attr_binary(as, key, value, strlen(value)); 311} 312 313/* 314 * Add a key/value attribute to the pax header. This function handles 315 * binary values. 316 */ 317static void 318add_pax_attr_binary(struct archive_string *as, const char *key, 319 const char *value, size_t value_len) 320{ 321 int digits, i, len, next_ten; 322 char tmp[1 + 3 * sizeof(int)]; /* < 3 base-10 digits per byte */ 323 324 /*- 325 * PAX attributes have the following layout: 326 * <len> <space> <key> <=> <value> <nl> 327 */ 328 len = 1 + (int)strlen(key) + 1 + (int)value_len + 1; 329 330 /* 331 * The <len> field includes the length of the <len> field, so 332 * computing the correct length is tricky. I start by 333 * counting the number of base-10 digits in 'len' and 334 * computing the next higher power of 10. 335 */ 336 next_ten = 1; 337 digits = 0; 338 i = len; 339 while (i > 0) { 340 i = i / 10; 341 digits++; 342 next_ten = next_ten * 10; 343 } 344 /* 345 * For example, if string without the length field is 99 346 * chars, then adding the 2 digit length "99" will force the 347 * total length past 100, requiring an extra digit. The next 348 * statement adjusts for this effect. 349 */ 350 if (len + digits >= next_ten) 351 digits++; 352 353 /* Now, we have the right length so we can build the line. */ 354 tmp[sizeof(tmp) - 1] = 0; /* Null-terminate the work area. */ 355 archive_strcat(as, format_int(tmp + sizeof(tmp) - 1, len + digits)); 356 archive_strappend_char(as, ' '); 357 archive_strcat(as, key); 358 archive_strappend_char(as, '='); 359 archive_array_append(as, value, value_len); 360 archive_strappend_char(as, '\n'); 361} 362 363static void 364archive_write_pax_header_xattr(struct pax *pax, const char *encoded_name, 365 const void *value, size_t value_len) 366{ 367 struct archive_string s; 368 char *encoded_value; 369 370 if (encoded_name == NULL) 371 return; 372 373 if (pax->flags & WRITE_LIBARCHIVE_XATTR) { 374 encoded_value = base64_encode((const char *)value, value_len); 375 if (encoded_value != NULL) { 376 archive_string_init(&s); 377 archive_strcpy(&s, "LIBARCHIVE.xattr."); 378 archive_strcat(&s, encoded_name); 379 add_pax_attr(&(pax->pax_header), s.s, encoded_value); 380 archive_string_free(&s); 381 } 382 free(encoded_value); 383 } 384 if (pax->flags & WRITE_SCHILY_XATTR) { 385 archive_string_init(&s); 386 archive_strcpy(&s, "SCHILY.xattr."); 387 archive_strcat(&s, encoded_name); 388 add_pax_attr_binary(&(pax->pax_header), s.s, value, value_len); 389 archive_string_free(&s); 390 } 391} 392 393static int 394archive_write_pax_header_xattrs(struct archive_write *a, 395 struct pax *pax, struct archive_entry *entry) 396{ 397 int i = archive_entry_xattr_reset(entry); 398 399 while (i--) { 400 const char *name; 401 const void *value; 402 char *url_encoded_name = NULL, *encoded_name = NULL; 403 size_t size; 404 int r; 405 406 archive_entry_xattr_next(entry, &name, &value, &size); 407 url_encoded_name = url_encode(name); 408 if (url_encoded_name == NULL) 409 goto malloc_error; 410 else { 411 /* Convert narrow-character to UTF-8. */ 412 r = archive_strcpy_l(&(pax->l_url_encoded_name), 413 url_encoded_name, pax->sconv_utf8); 414 free(url_encoded_name); /* Done with this. */ 415 if (r == 0) 416 encoded_name = pax->l_url_encoded_name.s; 417 else if (r == -1) 418 goto malloc_error; 419 else { 420 archive_set_error(&a->archive, 421 ARCHIVE_ERRNO_MISC, 422 "Error encoding pax extended attribute"); 423 return (ARCHIVE_FAILED); 424 } 425 } 426 427 archive_write_pax_header_xattr(pax, encoded_name, 428 value, size); 429 430 } 431 return (ARCHIVE_OK); 432malloc_error: 433 archive_set_error(&a->archive, ENOMEM, "Can't allocate memory"); 434 return (ARCHIVE_FATAL); 435} 436 437static int 438get_entry_hardlink(struct archive_write *a, struct archive_entry *entry, 439 const char **name, size_t *length, struct archive_string_conv *sc) 440{ 441 int r; 442 443 r = archive_entry_hardlink_l(entry, name, length, sc); 444 if (r != 0) { 445 if (errno == ENOMEM) { 446 archive_set_error(&a->archive, ENOMEM, 447 "Can't allocate memory for Linkname"); 448 return (ARCHIVE_FATAL); 449 } 450 return (ARCHIVE_WARN); 451 } 452 return (ARCHIVE_OK); 453} 454 455static int 456get_entry_pathname(struct archive_write *a, struct archive_entry *entry, 457 const char **name, size_t *length, struct archive_string_conv *sc) 458{ 459 int r; 460 461 r = archive_entry_pathname_l(entry, name, length, sc); 462 if (r != 0) { 463 if (errno == ENOMEM) { 464 archive_set_error(&a->archive, ENOMEM, 465 "Can't allocate memory for Pathname"); 466 return (ARCHIVE_FATAL); 467 } 468 return (ARCHIVE_WARN); 469 } 470 return (ARCHIVE_OK); 471} 472 473static int 474get_entry_uname(struct archive_write *a, struct archive_entry *entry, 475 const char **name, size_t *length, struct archive_string_conv *sc) 476{ 477 int r; 478 479 r = archive_entry_uname_l(entry, name, length, sc); 480 if (r != 0) { 481 if (errno == ENOMEM) { 482 archive_set_error(&a->archive, ENOMEM, 483 "Can't allocate memory for Uname"); 484 return (ARCHIVE_FATAL); 485 } 486 return (ARCHIVE_WARN); 487 } 488 return (ARCHIVE_OK); 489} 490 491static int 492get_entry_gname(struct archive_write *a, struct archive_entry *entry, 493 const char **name, size_t *length, struct archive_string_conv *sc) 494{ 495 int r; 496 497 r = archive_entry_gname_l(entry, name, length, sc); 498 if (r != 0) { 499 if (errno == ENOMEM) { 500 archive_set_error(&a->archive, ENOMEM, 501 "Can't allocate memory for Gname"); 502 return (ARCHIVE_FATAL); 503 } 504 return (ARCHIVE_WARN); 505 } 506 return (ARCHIVE_OK); 507} 508 509static int 510get_entry_symlink(struct archive_write *a, struct archive_entry *entry, 511 const char **name, size_t *length, struct archive_string_conv *sc) 512{ 513 int r; 514 515 r = archive_entry_symlink_l(entry, name, length, sc); 516 if (r != 0) { 517 if (errno == ENOMEM) { 518 archive_set_error(&a->archive, ENOMEM, 519 "Can't allocate memory for Linkname"); 520 return (ARCHIVE_FATAL); 521 } 522 return (ARCHIVE_WARN); 523 } 524 return (ARCHIVE_OK); 525} 526 527/* Add ACL to pax header */ 528static int 529add_pax_acl(struct archive_write *a, 530 struct archive_entry *entry, struct pax *pax, int flags) 531{ 532 char *p; 533 const char *attr; 534 int acl_types; 535 536 acl_types = archive_entry_acl_types(entry); 537 538 if ((acl_types & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) 539 attr = "SCHILY.acl.ace"; 540 else if ((flags & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0) 541 attr = "SCHILY.acl.access"; 542 else if ((flags & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) != 0) 543 attr = "SCHILY.acl.default"; 544 else 545 return (ARCHIVE_FATAL); 546 547 p = archive_entry_acl_to_text_l(entry, NULL, flags, pax->sconv_utf8); 548 if (p == NULL) { 549 if (errno == ENOMEM) { 550 archive_set_error(&a->archive, ENOMEM, "%s %s", 551 "Can't allocate memory for ", attr); 552 return (ARCHIVE_FATAL); 553 } 554 archive_set_error(&a->archive, 555 ARCHIVE_ERRNO_FILE_FORMAT, "%s %s %s", 556 "Can't translate ", attr, " to UTF-8"); 557 return(ARCHIVE_WARN); 558 } 559 560 if (*p != '\0') { 561 add_pax_attr(&(pax->pax_header), 562 attr, p); 563 } 564 free(p); 565 return(ARCHIVE_OK); 566} 567 568/* 569 * TODO: Consider adding 'comment' and 'charset' fields to 570 * archive_entry so that clients can specify them. Also, consider 571 * adding generic key/value tags so clients can add arbitrary 572 * key/value data. 573 * 574 * TODO: Break up this 700-line function!!!! Yowza! 575 */ 576static int 577archive_write_pax_header(struct archive_write *a, 578 struct archive_entry *entry_original) 579{ 580 struct archive_entry *entry_main; 581 const char *p; 582 const char *suffix; 583 int need_extension, r, ret; 584 int acl_types; 585 int sparse_count; 586 uint64_t sparse_total, real_size; 587 struct pax *pax; 588 const char *hardlink; 589 const char *path = NULL, *linkpath = NULL; 590 const char *uname = NULL, *gname = NULL; 591 const void *mac_metadata; 592 size_t mac_metadata_size; 593 struct archive_string_conv *sconv; 594 size_t hardlink_length, path_length, linkpath_length; 595 size_t uname_length, gname_length; 596 597 char paxbuff[512]; 598 char ustarbuff[512]; 599 char ustar_entry_name[256]; 600 char pax_entry_name[256]; 601 char gnu_sparse_name[256]; 602 struct archive_string entry_name; 603 604 ret = ARCHIVE_OK; 605 need_extension = 0; 606 pax = (struct pax *)a->format_data; 607 608 const time_t ustar_max_mtime = get_ustar_max_mtime(); 609 610 /* Sanity check. */ 611 if (archive_entry_pathname(entry_original) == NULL) { 612 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 613 "Can't record entry in tar file without pathname"); 614 return (ARCHIVE_FAILED); 615 } 616 617 /* 618 * Choose a header encoding. 619 */ 620 if (pax->opt_binary) 621 sconv = NULL;/* Binary mode. */ 622 else { 623 /* Header encoding is UTF-8. */ 624 if (pax->sconv_utf8 == NULL) { 625 /* Initialize the string conversion object 626 * we must need */ 627 pax->sconv_utf8 = archive_string_conversion_to_charset( 628 &(a->archive), "UTF-8", 1); 629 if (pax->sconv_utf8 == NULL) 630 /* Couldn't allocate memory */ 631 return (ARCHIVE_FAILED); 632 } 633 sconv = pax->sconv_utf8; 634 } 635 636 r = get_entry_hardlink(a, entry_original, &hardlink, 637 &hardlink_length, sconv); 638 if (r == ARCHIVE_FATAL) 639 return (r); 640 else if (r != ARCHIVE_OK) { 641 r = get_entry_hardlink(a, entry_original, &hardlink, 642 &hardlink_length, NULL); 643 if (r == ARCHIVE_FATAL) 644 return (r); 645 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 646 "Can't translate linkname '%s' to %s", hardlink, 647 archive_string_conversion_charset_name(sconv)); 648 ret = ARCHIVE_WARN; 649 sconv = NULL;/* The header charset switches to binary mode. */ 650 } 651 652 /* Make sure this is a type of entry that we can handle here */ 653 if (hardlink == NULL) { 654 switch (archive_entry_filetype(entry_original)) { 655 case AE_IFBLK: 656 case AE_IFCHR: 657 case AE_IFIFO: 658 case AE_IFLNK: 659 case AE_IFREG: 660 break; 661 case AE_IFDIR: 662 { 663 /* 664 * Ensure a trailing '/'. Modify the original 665 * entry so the client sees the change. 666 */ 667#if defined(_WIN32) && !defined(__CYGWIN__) 668 const wchar_t *wp; 669 670 wp = archive_entry_pathname_w(entry_original); 671 if (wp != NULL && wp[wcslen(wp) -1] != L'/') { 672 struct archive_wstring ws; 673 674 archive_string_init(&ws); 675 path_length = wcslen(wp); 676 if (archive_wstring_ensure(&ws, 677 path_length + 2) == NULL) { 678 archive_set_error(&a->archive, ENOMEM, 679 "Can't allocate pax data"); 680 archive_wstring_free(&ws); 681 return(ARCHIVE_FATAL); 682 } 683 /* Should we keep '\' ? */ 684 if (wp[path_length -1] == L'\\') 685 path_length--; 686 archive_wstrncpy(&ws, wp, path_length); 687 archive_wstrappend_wchar(&ws, L'/'); 688 archive_entry_copy_pathname_w( 689 entry_original, ws.s); 690 archive_wstring_free(&ws); 691 p = NULL; 692 } else 693#endif 694 p = archive_entry_pathname(entry_original); 695 /* 696 * On Windows, this is a backup operation just in 697 * case getting WCS failed. On POSIX, this is a 698 * normal operation. 699 */ 700 if (p != NULL && p[0] != '\0' && p[strlen(p) - 1] != '/') { 701 struct archive_string as; 702 703 archive_string_init(&as); 704 path_length = strlen(p); 705 if (archive_string_ensure(&as, 706 path_length + 2) == NULL) { 707 archive_set_error(&a->archive, ENOMEM, 708 "Can't allocate pax data"); 709 archive_string_free(&as); 710 return(ARCHIVE_FATAL); 711 } 712#if defined(_WIN32) && !defined(__CYGWIN__) 713 /* NOTE: This might break the pathname 714 * if the current code page is CP932 and 715 * the pathname includes a character '\' 716 * as a part of its multibyte pathname. */ 717 if (p[strlen(p) -1] == '\\') 718 path_length--; 719 else 720#endif 721 archive_strncpy(&as, p, path_length); 722 archive_strappend_char(&as, '/'); 723 archive_entry_copy_pathname( 724 entry_original, as.s); 725 archive_string_free(&as); 726 } 727 break; 728 } 729 default: /* AE_IFSOCK and unknown */ 730 __archive_write_entry_filetype_unsupported( 731 &a->archive, entry_original, "pax"); 732 return (ARCHIVE_FAILED); 733 } 734 } 735 736 /* 737 * If Mac OS metadata blob is here, recurse to write that 738 * as a separate entry. This is really a pretty poor design: 739 * In particular, it doubles the overhead for long filenames. 740 * TODO: Help Apple folks design something better and figure 741 * out how to transition from this legacy format. 742 * 743 * Note that this code is present on every platform; clients 744 * on non-Mac are unlikely to ever provide this data, but 745 * applications that copy entries from one archive to another 746 * should not lose data just because the local filesystem 747 * can't store it. 748 */ 749 mac_metadata = 750 archive_entry_mac_metadata(entry_original, &mac_metadata_size); 751 if (mac_metadata != NULL) { 752 const char *oname; 753 char *name, *bname; 754 size_t name_length; 755 struct archive_entry *extra = archive_entry_new2(&a->archive); 756 757 oname = archive_entry_pathname(entry_original); 758 name_length = strlen(oname); 759 name = malloc(name_length + 3); 760 if (name == NULL || extra == NULL) { 761 /* XXX error message */ 762 archive_entry_free(extra); 763 free(name); 764 return (ARCHIVE_FAILED); 765 } 766 strcpy(name, oname); 767 /* Find last '/'; strip trailing '/' characters */ 768 bname = strrchr(name, '/'); 769 while (bname != NULL && bname[1] == '\0') { 770 *bname = '\0'; 771 bname = strrchr(name, '/'); 772 } 773 if (bname == NULL) { 774 memmove(name + 2, name, name_length + 1); 775 memmove(name, "._", 2); 776 } else { 777 bname += 1; 778 memmove(bname + 2, bname, strlen(bname) + 1); 779 memmove(bname, "._", 2); 780 } 781 archive_entry_copy_pathname(extra, name); 782 free(name); 783 784 archive_entry_set_size(extra, mac_metadata_size); 785 archive_entry_set_filetype(extra, AE_IFREG); 786 archive_entry_set_perm(extra, 787 archive_entry_perm(entry_original)); 788 archive_entry_set_mtime(extra, 789 archive_entry_mtime(entry_original), 790 archive_entry_mtime_nsec(entry_original)); 791 archive_entry_set_gid(extra, 792 archive_entry_gid(entry_original)); 793 archive_entry_set_gname(extra, 794 archive_entry_gname(entry_original)); 795 archive_entry_set_uid(extra, 796 archive_entry_uid(entry_original)); 797 archive_entry_set_uname(extra, 798 archive_entry_uname(entry_original)); 799 800 /* Recurse to write the special copyfile entry. */ 801 r = archive_write_pax_header(a, extra); 802 archive_entry_free(extra); 803 if (r < ARCHIVE_WARN) 804 return (r); 805 if (r < ret) 806 ret = r; 807 r = (int)archive_write_pax_data(a, mac_metadata, 808 mac_metadata_size); 809 if (r < ARCHIVE_WARN) 810 return (r); 811 if (r < ret) 812 ret = r; 813 r = archive_write_pax_finish_entry(a); 814 if (r < ARCHIVE_WARN) 815 return (r); 816 if (r < ret) 817 ret = r; 818 } 819 820 /* Copy entry so we can modify it as needed. */ 821#if defined(_WIN32) && !defined(__CYGWIN__) 822 /* Make sure the path separators in pathname, hardlink and symlink 823 * are all slash '/', not the Windows path separator '\'. */ 824 entry_main = __la_win_entry_in_posix_pathseparator(entry_original); 825 if (entry_main == entry_original) 826 entry_main = archive_entry_clone(entry_original); 827#else 828 entry_main = archive_entry_clone(entry_original); 829#endif 830 if (entry_main == NULL) { 831 archive_set_error(&a->archive, ENOMEM, 832 "Can't allocate pax data"); 833 return(ARCHIVE_FATAL); 834 } 835 archive_string_empty(&(pax->pax_header)); /* Blank our work area. */ 836 archive_string_empty(&(pax->sparse_map)); 837 sparse_total = 0; 838 sparse_list_clear(pax); 839 840 if (hardlink == NULL && 841 archive_entry_filetype(entry_main) == AE_IFREG) 842 sparse_count = archive_entry_sparse_reset(entry_main); 843 else 844 sparse_count = 0; 845 if (sparse_count) { 846 int64_t offset, length, last_offset = 0; 847 /* Get the last entry of sparse block. */ 848 while (archive_entry_sparse_next( 849 entry_main, &offset, &length) == ARCHIVE_OK) 850 last_offset = offset + length; 851 852 /* If the last sparse block does not reach the end of file, 853 * We have to add a empty sparse block as the last entry to 854 * manage storing file data. */ 855 if (last_offset < archive_entry_size(entry_main)) 856 archive_entry_sparse_add_entry(entry_main, 857 archive_entry_size(entry_main), 0); 858 sparse_count = archive_entry_sparse_reset(entry_main); 859 } 860 861 /* 862 * First, check the name fields and see if any of them 863 * require binary coding. If any of them does, then all of 864 * them do. 865 */ 866 r = get_entry_pathname(a, entry_main, &path, &path_length, sconv); 867 if (r == ARCHIVE_FATAL) { 868 archive_entry_free(entry_main); 869 return (r); 870 } else if (r != ARCHIVE_OK) { 871 r = get_entry_pathname(a, entry_main, &path, 872 &path_length, NULL); 873 if (r == ARCHIVE_FATAL) { 874 archive_entry_free(entry_main); 875 return (r); 876 } 877 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 878 "Can't translate pathname '%s' to %s", path, 879 archive_string_conversion_charset_name(sconv)); 880 ret = ARCHIVE_WARN; 881 sconv = NULL;/* The header charset switches to binary mode. */ 882 } 883 r = get_entry_uname(a, entry_main, &uname, &uname_length, sconv); 884 if (r == ARCHIVE_FATAL) { 885 archive_entry_free(entry_main); 886 return (r); 887 } else if (r != ARCHIVE_OK) { 888 r = get_entry_uname(a, entry_main, &uname, &uname_length, NULL); 889 if (r == ARCHIVE_FATAL) { 890 archive_entry_free(entry_main); 891 return (r); 892 } 893 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 894 "Can't translate uname '%s' to %s", uname, 895 archive_string_conversion_charset_name(sconv)); 896 ret = ARCHIVE_WARN; 897 sconv = NULL;/* The header charset switches to binary mode. */ 898 } 899 r = get_entry_gname(a, entry_main, &gname, &gname_length, sconv); 900 if (r == ARCHIVE_FATAL) { 901 archive_entry_free(entry_main); 902 return (r); 903 } else if (r != ARCHIVE_OK) { 904 r = get_entry_gname(a, entry_main, &gname, &gname_length, NULL); 905 if (r == ARCHIVE_FATAL) { 906 archive_entry_free(entry_main); 907 return (r); 908 } 909 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 910 "Can't translate gname '%s' to %s", gname, 911 archive_string_conversion_charset_name(sconv)); 912 ret = ARCHIVE_WARN; 913 sconv = NULL;/* The header charset switches to binary mode. */ 914 } 915 linkpath = hardlink; 916 linkpath_length = hardlink_length; 917 if (linkpath == NULL) { 918 r = get_entry_symlink(a, entry_main, &linkpath, 919 &linkpath_length, sconv); 920 if (r == ARCHIVE_FATAL) { 921 archive_entry_free(entry_main); 922 return (r); 923 } else if (r != ARCHIVE_OK) { 924 r = get_entry_symlink(a, entry_main, &linkpath, 925 &linkpath_length, NULL); 926 if (r == ARCHIVE_FATAL) { 927 archive_entry_free(entry_main); 928 return (r); 929 } 930 archive_set_error(&a->archive, 931 ARCHIVE_ERRNO_FILE_FORMAT, 932 "Can't translate linkname '%s' to %s", linkpath, 933 archive_string_conversion_charset_name(sconv)); 934 ret = ARCHIVE_WARN; 935 sconv = NULL; 936 } 937 } 938 939 /* If any string conversions failed, get all attributes 940 * in binary-mode. */ 941 if (sconv == NULL && !pax->opt_binary) { 942 if (hardlink != NULL) { 943 r = get_entry_hardlink(a, entry_main, &hardlink, 944 &hardlink_length, NULL); 945 if (r == ARCHIVE_FATAL) { 946 archive_entry_free(entry_main); 947 return (r); 948 } 949 linkpath = hardlink; 950 linkpath_length = hardlink_length; 951 } 952 r = get_entry_pathname(a, entry_main, &path, 953 &path_length, NULL); 954 if (r == ARCHIVE_FATAL) { 955 archive_entry_free(entry_main); 956 return (r); 957 } 958 r = get_entry_uname(a, entry_main, &uname, &uname_length, NULL); 959 if (r == ARCHIVE_FATAL) { 960 archive_entry_free(entry_main); 961 return (r); 962 } 963 r = get_entry_gname(a, entry_main, &gname, &gname_length, NULL); 964 if (r == ARCHIVE_FATAL) { 965 archive_entry_free(entry_main); 966 return (r); 967 } 968 } 969 970 /* Store the header encoding first, to be nice to readers. */ 971 if (sconv == NULL) 972 add_pax_attr(&(pax->pax_header), "hdrcharset", "BINARY"); 973 974 975 /* 976 * If name is too long, or has non-ASCII characters, add 977 * 'path' to pax extended attrs. (Note that an unconvertible 978 * name must have non-ASCII characters.) 979 */ 980 if (has_non_ASCII(path)) { 981 /* We have non-ASCII characters. */ 982 add_pax_attr(&(pax->pax_header), "path", path); 983 archive_entry_set_pathname(entry_main, 984 build_ustar_entry_name(ustar_entry_name, 985 path, path_length, NULL)); 986 need_extension = 1; 987 } else { 988 /* We have an all-ASCII path; we'd like to just store 989 * it in the ustar header if it will fit. Yes, this 990 * duplicates some of the logic in 991 * archive_write_set_format_ustar.c 992 */ 993 if (path_length <= 100) { 994 /* Fits in the old 100-char tar name field. */ 995 } else { 996 /* Find largest suffix that will fit. */ 997 /* Note: strlen() > 100, so strlen() - 100 - 1 >= 0 */ 998 suffix = strchr(path + path_length - 100 - 1, '/'); 999 /* Don't attempt an empty prefix. */ 1000 if (suffix == path) 1001 suffix = strchr(suffix + 1, '/'); 1002 /* We can put it in the ustar header if it's 1003 * all ASCII and it's either <= 100 characters 1004 * or can be split at a '/' into a prefix <= 1005 * 155 chars and a suffix <= 100 chars. (Note 1006 * the strchr() above will return NULL exactly 1007 * when the path can't be split.) 1008 */ 1009 if (suffix == NULL /* Suffix > 100 chars. */ 1010 || suffix[1] == '\0' /* empty suffix */ 1011 || suffix - path > 155) /* Prefix > 155 chars */ 1012 { 1013 add_pax_attr(&(pax->pax_header), "path", path); 1014 archive_entry_set_pathname(entry_main, 1015 build_ustar_entry_name(ustar_entry_name, 1016 path, path_length, NULL)); 1017 need_extension = 1; 1018 } 1019 } 1020 } 1021 1022 if (linkpath != NULL) { 1023 /* If link name is too long or has non-ASCII characters, add 1024 * 'linkpath' to pax extended attrs. */ 1025 if (linkpath_length > 100 || has_non_ASCII(linkpath)) { 1026 add_pax_attr(&(pax->pax_header), "linkpath", linkpath); 1027 if (linkpath_length > 100) { 1028 if (hardlink != NULL) 1029 archive_entry_set_hardlink(entry_main, 1030 "././@LongHardLink"); 1031 else 1032 archive_entry_set_symlink(entry_main, 1033 "././@LongSymLink"); 1034 } 1035 need_extension = 1; 1036 } 1037 } 1038 /* Save a pathname since it will be renamed if `entry_main` has 1039 * sparse blocks. */ 1040 archive_string_init(&entry_name); 1041 archive_strcpy(&entry_name, archive_entry_pathname(entry_main)); 1042 1043 /* If file size is too large, we need pax extended attrs. */ 1044 if (archive_entry_size(entry_main) >= (((int64_t)1) << 33)) { 1045 need_extension = 1; 1046 } 1047 1048 /* If numeric GID is too large, add 'gid' to pax extended attrs. */ 1049 if ((unsigned int)archive_entry_gid(entry_main) >= (1 << 18)) { 1050 add_pax_attr_int(&(pax->pax_header), "gid", 1051 archive_entry_gid(entry_main)); 1052 need_extension = 1; 1053 } 1054 1055 /* If group name is too large or has non-ASCII characters, add 1056 * 'gname' to pax extended attrs. */ 1057 if (gname != NULL) { 1058 if (gname_length > 31 || has_non_ASCII(gname)) { 1059 add_pax_attr(&(pax->pax_header), "gname", gname); 1060 need_extension = 1; 1061 } 1062 } 1063 1064 /* If numeric UID is too large, add 'uid' to pax extended attrs. */ 1065 if ((unsigned int)archive_entry_uid(entry_main) >= (1 << 18)) { 1066 add_pax_attr_int(&(pax->pax_header), "uid", 1067 archive_entry_uid(entry_main)); 1068 need_extension = 1; 1069 } 1070 1071 /* Add 'uname' to pax extended attrs if necessary. */ 1072 if (uname != NULL) { 1073 if (uname_length > 31 || has_non_ASCII(uname)) { 1074 add_pax_attr(&(pax->pax_header), "uname", uname); 1075 need_extension = 1; 1076 } 1077 } 1078 1079 /* 1080 * POSIX/SUSv3 doesn't provide a standard key for large device 1081 * numbers. I use the same keys here that Joerg Schilling 1082 * used for 'star.' (Which, somewhat confusingly, are called 1083 * "devXXX" even though they code "rdev" values.) No doubt, 1084 * other implementations use other keys. Note that there's no 1085 * reason we can't write the same information into a number of 1086 * different keys. 1087 * 1088 * Of course, this is only needed for block or char device entries. 1089 */ 1090 if (archive_entry_filetype(entry_main) == AE_IFBLK 1091 || archive_entry_filetype(entry_main) == AE_IFCHR) { 1092 /* 1093 * If rdevmajor is too large, add 'SCHILY.devmajor' to 1094 * extended attributes. 1095 */ 1096 int rdevmajor, rdevminor; 1097 rdevmajor = archive_entry_rdevmajor(entry_main); 1098 rdevminor = archive_entry_rdevminor(entry_main); 1099 if (rdevmajor >= (1 << 18)) { 1100 add_pax_attr_int(&(pax->pax_header), "SCHILY.devmajor", 1101 rdevmajor); 1102 /* 1103 * Non-strict formatting below means we don't 1104 * have to truncate here. Not truncating improves 1105 * the chance that some more modern tar archivers 1106 * (such as GNU tar 1.13) can restore the full 1107 * value even if they don't understand the pax 1108 * extended attributes. See my rant below about 1109 * file size fields for additional details. 1110 */ 1111 /* archive_entry_set_rdevmajor(entry_main, 1112 rdevmajor & ((1 << 18) - 1)); */ 1113 need_extension = 1; 1114 } 1115 1116 /* 1117 * If devminor is too large, add 'SCHILY.devminor' to 1118 * extended attributes. 1119 */ 1120 if (rdevminor >= (1 << 18)) { 1121 add_pax_attr_int(&(pax->pax_header), "SCHILY.devminor", 1122 rdevminor); 1123 /* Truncation is not necessary here, either. */ 1124 /* archive_entry_set_rdevminor(entry_main, 1125 rdevminor & ((1 << 18) - 1)); */ 1126 need_extension = 1; 1127 } 1128 } 1129 1130 /* 1131 * Yes, this check is duplicated just below; this helps to 1132 * avoid writing an mtime attribute just to handle a 1133 * high-resolution timestamp in "restricted pax" mode. 1134 */ 1135 if (!need_extension && 1136 ((archive_entry_mtime(entry_main) < 0) 1137 || (archive_entry_mtime(entry_main) >= ustar_max_mtime))) 1138 need_extension = 1; 1139 1140 /* I use a star-compatible file flag attribute. */ 1141 p = archive_entry_fflags_text(entry_main); 1142 if (!need_extension && p != NULL && *p != '\0') 1143 need_extension = 1; 1144 1145 /* If there are extended attributes, we need an extension */ 1146 if (!need_extension && archive_entry_xattr_count(entry_original) > 0) 1147 need_extension = 1; 1148 1149 /* If there are sparse info, we need an extension */ 1150 if (!need_extension && sparse_count > 0) 1151 need_extension = 1; 1152 1153 acl_types = archive_entry_acl_types(entry_original); 1154 1155 /* If there are any ACL entries, we need an extension */ 1156 if (!need_extension && acl_types != 0) 1157 need_extension = 1; 1158 1159 /* If the symlink type is defined, we need an extension */ 1160 if (!need_extension && archive_entry_symlink_type(entry_main) > 0) 1161 need_extension = 1; 1162 1163 /* 1164 * Libarchive used to include these in extended headers for 1165 * restricted pax format, but that confused people who 1166 * expected ustar-like time semantics. So now we only include 1167 * them in full pax format. 1168 */ 1169 if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_RESTRICTED) { 1170 if (archive_entry_ctime(entry_main) != 0 || 1171 archive_entry_ctime_nsec(entry_main) != 0) 1172 add_pax_attr_time(&(pax->pax_header), "ctime", 1173 archive_entry_ctime(entry_main), 1174 archive_entry_ctime_nsec(entry_main)); 1175 1176 if (archive_entry_atime(entry_main) != 0 || 1177 archive_entry_atime_nsec(entry_main) != 0) 1178 add_pax_attr_time(&(pax->pax_header), "atime", 1179 archive_entry_atime(entry_main), 1180 archive_entry_atime_nsec(entry_main)); 1181 1182 /* Store birth/creationtime only if it's earlier than mtime */ 1183 if (archive_entry_birthtime_is_set(entry_main) && 1184 archive_entry_birthtime(entry_main) 1185 < archive_entry_mtime(entry_main)) 1186 add_pax_attr_time(&(pax->pax_header), 1187 "LIBARCHIVE.creationtime", 1188 archive_entry_birthtime(entry_main), 1189 archive_entry_birthtime_nsec(entry_main)); 1190 } 1191 1192 /* 1193 * The following items are handled differently in "pax 1194 * restricted" format. In particular, in "pax restricted" 1195 * format they won't be added unless need_extension is 1196 * already set (we're already generating an extended header, so 1197 * may as well include these). 1198 */ 1199 if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_RESTRICTED || 1200 need_extension) { 1201 if (archive_entry_mtime(entry_main) < 0 || 1202 archive_entry_mtime(entry_main) >= ustar_max_mtime || 1203 archive_entry_mtime_nsec(entry_main) != 0) 1204 add_pax_attr_time(&(pax->pax_header), "mtime", 1205 archive_entry_mtime(entry_main), 1206 archive_entry_mtime_nsec(entry_main)); 1207 1208 /* I use a star-compatible file flag attribute. */ 1209 p = archive_entry_fflags_text(entry_main); 1210 if (p != NULL && *p != '\0') 1211 add_pax_attr(&(pax->pax_header), "SCHILY.fflags", p); 1212 1213 /* I use star-compatible ACL attributes. */ 1214 if ((acl_types & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) { 1215 ret = add_pax_acl(a, entry_original, pax, 1216 ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID | 1217 ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA | 1218 ARCHIVE_ENTRY_ACL_STYLE_COMPACT); 1219 if (ret == ARCHIVE_FATAL) { 1220 archive_entry_free(entry_main); 1221 archive_string_free(&entry_name); 1222 return (ARCHIVE_FATAL); 1223 } 1224 } 1225 if (acl_types & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) { 1226 ret = add_pax_acl(a, entry_original, pax, 1227 ARCHIVE_ENTRY_ACL_TYPE_ACCESS | 1228 ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID | 1229 ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA); 1230 if (ret == ARCHIVE_FATAL) { 1231 archive_entry_free(entry_main); 1232 archive_string_free(&entry_name); 1233 return (ARCHIVE_FATAL); 1234 } 1235 } 1236 if (acl_types & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) { 1237 ret = add_pax_acl(a, entry_original, pax, 1238 ARCHIVE_ENTRY_ACL_TYPE_DEFAULT | 1239 ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID | 1240 ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA); 1241 if (ret == ARCHIVE_FATAL) { 1242 archive_entry_free(entry_main); 1243 archive_string_free(&entry_name); 1244 return (ARCHIVE_FATAL); 1245 } 1246 } 1247 1248 /* We use GNU-tar-compatible sparse attributes. */ 1249 if (sparse_count > 0) { 1250 int64_t soffset, slength; 1251 1252 add_pax_attr_int(&(pax->pax_header), 1253 "GNU.sparse.major", 1); 1254 add_pax_attr_int(&(pax->pax_header), 1255 "GNU.sparse.minor", 0); 1256 /* 1257 * Make sure to store the original path, since 1258 * truncation to ustar limit happened already. 1259 */ 1260 add_pax_attr(&(pax->pax_header), 1261 "GNU.sparse.name", path); 1262 add_pax_attr_int(&(pax->pax_header), 1263 "GNU.sparse.realsize", 1264 archive_entry_size(entry_main)); 1265 1266 /* Rename the file name which will be used for 1267 * ustar header to a special name, which GNU 1268 * PAX Format 1.0 requires */ 1269 archive_entry_set_pathname(entry_main, 1270 build_gnu_sparse_name(gnu_sparse_name, 1271 entry_name.s)); 1272 1273 /* 1274 * - Make a sparse map, which will precede a file data. 1275 * - Get the total size of available data of sparse. 1276 */ 1277 archive_string_sprintf(&(pax->sparse_map), "%d\n", 1278 sparse_count); 1279 while (archive_entry_sparse_next(entry_main, 1280 &soffset, &slength) == ARCHIVE_OK) { 1281 archive_string_sprintf(&(pax->sparse_map), 1282 "%jd\n%jd\n", 1283 (intmax_t)soffset, 1284 (intmax_t)slength); 1285 sparse_total += slength; 1286 if (sparse_list_add(pax, soffset, slength) 1287 != ARCHIVE_OK) { 1288 archive_set_error(&a->archive, 1289 ENOMEM, 1290 "Can't allocate memory"); 1291 archive_entry_free(entry_main); 1292 archive_string_free(&entry_name); 1293 return (ARCHIVE_FATAL); 1294 } 1295 } 1296 } 1297 1298 /* Store extended attributes */ 1299 if (archive_write_pax_header_xattrs(a, pax, entry_original) 1300 == ARCHIVE_FATAL) { 1301 archive_entry_free(entry_main); 1302 archive_string_free(&entry_name); 1303 return (ARCHIVE_FATAL); 1304 } 1305 1306 /* Store extended symlink information */ 1307 if (archive_entry_symlink_type(entry_main) == 1308 AE_SYMLINK_TYPE_FILE) { 1309 add_pax_attr(&(pax->pax_header), 1310 "LIBARCHIVE.symlinktype", "file"); 1311 } else if (archive_entry_symlink_type(entry_main) == 1312 AE_SYMLINK_TYPE_DIRECTORY) { 1313 add_pax_attr(&(pax->pax_header), 1314 "LIBARCHIVE.symlinktype", "dir"); 1315 } 1316 } 1317 1318 /* Only regular files have data. */ 1319 if (archive_entry_filetype(entry_main) != AE_IFREG) 1320 archive_entry_set_size(entry_main, 0); 1321 1322 /* 1323 * Pax-restricted does not store data for hardlinks, in order 1324 * to improve compatibility with ustar. 1325 */ 1326 if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE && 1327 hardlink != NULL) 1328 archive_entry_set_size(entry_main, 0); 1329 1330 /* 1331 * XXX Full pax interchange format does permit a hardlink 1332 * entry to have data associated with it. I'm not supporting 1333 * that here because the client expects me to tell them whether 1334 * or not this format expects data for hardlinks. If I 1335 * don't check here, then every pax archive will end up with 1336 * duplicated data for hardlinks. Someday, there may be 1337 * need to select this behavior, in which case the following 1338 * will need to be revisited. XXX 1339 */ 1340 if (hardlink != NULL) 1341 archive_entry_set_size(entry_main, 0); 1342 1343 /* Save a real file size. */ 1344 real_size = archive_entry_size(entry_main); 1345 /* 1346 * Overwrite a file size by the total size of sparse blocks and 1347 * the size of sparse map info. That file size is the length of 1348 * the data, which we will exactly store into an archive file. 1349 */ 1350 if (archive_strlen(&(pax->sparse_map))) { 1351 size_t mapsize = archive_strlen(&(pax->sparse_map)); 1352 pax->sparse_map_padding = 0x1ff & (-(ssize_t)mapsize); 1353 archive_entry_set_size(entry_main, 1354 mapsize + pax->sparse_map_padding + sparse_total); 1355 } 1356 1357 /* If file size is too large, add 'size' to pax extended attrs. */ 1358 if (archive_entry_size(entry_main) >= (((int64_t)1) << 33)) { 1359 add_pax_attr_int(&(pax->pax_header), "size", 1360 archive_entry_size(entry_main)); 1361 } 1362 1363 /* Format 'ustar' header for main entry. 1364 * 1365 * The trouble with file size: If the reader can't understand 1366 * the file size, they may not be able to locate the next 1367 * entry and the rest of the archive is toast. Pax-compliant 1368 * readers are supposed to ignore the file size in the main 1369 * header, so the question becomes how to maximize portability 1370 * for readers that don't support pax attribute extensions. 1371 * For maximum compatibility, I permit numeric extensions in 1372 * the main header so that the file size stored will always be 1373 * correct, even if it's in a format that only some 1374 * implementations understand. The technique used here is: 1375 * 1376 * a) If possible, follow the standard exactly. This handles 1377 * files up to 8 gigabytes minus 1. 1378 * 1379 * b) If that fails, try octal but omit the field terminator. 1380 * That handles files up to 64 gigabytes minus 1. 1381 * 1382 * c) Otherwise, use base-256 extensions. That handles files 1383 * up to 2^63 in this implementation, with the potential to 1384 * go up to 2^94. That should hold us for a while. ;-) 1385 * 1386 * The non-strict formatter uses similar logic for other 1387 * numeric fields, though they're less critical. 1388 */ 1389 if (__archive_write_format_header_ustar(a, ustarbuff, entry_main, -1, 0, 1390 NULL) == ARCHIVE_FATAL) { 1391 archive_entry_free(entry_main); 1392 archive_string_free(&entry_name); 1393 return (ARCHIVE_FATAL); 1394 } 1395 1396 /* If we built any extended attributes, write that entry first. */ 1397 if (archive_strlen(&(pax->pax_header)) > 0) { 1398 struct archive_entry *pax_attr_entry; 1399 time_t s; 1400 int64_t uid, gid; 1401 int mode; 1402 1403 pax_attr_entry = archive_entry_new2(&a->archive); 1404 p = entry_name.s; 1405 archive_entry_set_pathname(pax_attr_entry, 1406 build_pax_attribute_name(pax_entry_name, p)); 1407 archive_entry_set_size(pax_attr_entry, 1408 archive_strlen(&(pax->pax_header))); 1409 /* Copy uid/gid (but clip to ustar limits). */ 1410 uid = archive_entry_uid(entry_main); 1411 if (uid >= 1 << 18) 1412 uid = (1 << 18) - 1; 1413 archive_entry_set_uid(pax_attr_entry, uid); 1414 gid = archive_entry_gid(entry_main); 1415 if (gid >= 1 << 18) 1416 gid = (1 << 18) - 1; 1417 archive_entry_set_gid(pax_attr_entry, gid); 1418 /* Copy mode over (but not setuid/setgid bits) */ 1419 mode = archive_entry_mode(entry_main); 1420#ifdef S_ISUID 1421 mode &= ~S_ISUID; 1422#endif 1423#ifdef S_ISGID 1424 mode &= ~S_ISGID; 1425#endif 1426#ifdef S_ISVTX 1427 mode &= ~S_ISVTX; 1428#endif 1429 archive_entry_set_mode(pax_attr_entry, mode); 1430 1431 /* Copy uname/gname. */ 1432 archive_entry_set_uname(pax_attr_entry, 1433 archive_entry_uname(entry_main)); 1434 archive_entry_set_gname(pax_attr_entry, 1435 archive_entry_gname(entry_main)); 1436 1437 /* Copy mtime, but clip to ustar limits. */ 1438 s = archive_entry_mtime(entry_main); 1439 if (s < 0) { s = 0; } 1440 if (s > ustar_max_mtime) { s = ustar_max_mtime; } 1441 archive_entry_set_mtime(pax_attr_entry, s, 0); 1442 1443 /* Standard ustar doesn't support atime. */ 1444 archive_entry_set_atime(pax_attr_entry, 0, 0); 1445 1446 /* Standard ustar doesn't support ctime. */ 1447 archive_entry_set_ctime(pax_attr_entry, 0, 0); 1448 1449 r = __archive_write_format_header_ustar(a, paxbuff, 1450 pax_attr_entry, 'x', 1, NULL); 1451 1452 archive_entry_free(pax_attr_entry); 1453 1454 /* Note that the 'x' header shouldn't ever fail to format */ 1455 if (r < ARCHIVE_WARN) { 1456 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1457 "archive_write_pax_header: " 1458 "'x' header failed?! This can't happen.\n"); 1459 archive_entry_free(entry_main); 1460 archive_string_free(&entry_name); 1461 return (ARCHIVE_FATAL); 1462 } else if (r < ret) 1463 ret = r; 1464 r = __archive_write_output(a, paxbuff, 512); 1465 if (r != ARCHIVE_OK) { 1466 sparse_list_clear(pax); 1467 pax->entry_bytes_remaining = 0; 1468 pax->entry_padding = 0; 1469 archive_entry_free(entry_main); 1470 archive_string_free(&entry_name); 1471 return (ARCHIVE_FATAL); 1472 } 1473 1474 pax->entry_bytes_remaining = archive_strlen(&(pax->pax_header)); 1475 pax->entry_padding = 1476 0x1ff & (-(int64_t)pax->entry_bytes_remaining); 1477 1478 r = __archive_write_output(a, pax->pax_header.s, 1479 archive_strlen(&(pax->pax_header))); 1480 if (r != ARCHIVE_OK) { 1481 /* If a write fails, we're pretty much toast. */ 1482 archive_entry_free(entry_main); 1483 archive_string_free(&entry_name); 1484 return (ARCHIVE_FATAL); 1485 } 1486 /* Pad out the end of the entry. */ 1487 r = __archive_write_nulls(a, (size_t)pax->entry_padding); 1488 if (r != ARCHIVE_OK) { 1489 /* If a write fails, we're pretty much toast. */ 1490 archive_entry_free(entry_main); 1491 archive_string_free(&entry_name); 1492 return (ARCHIVE_FATAL); 1493 } 1494 pax->entry_bytes_remaining = pax->entry_padding = 0; 1495 } 1496 1497 /* Write the header for main entry. */ 1498 r = __archive_write_output(a, ustarbuff, 512); 1499 if (r != ARCHIVE_OK) { 1500 archive_entry_free(entry_main); 1501 archive_string_free(&entry_name); 1502 return (r); 1503 } 1504 1505 /* 1506 * Inform the client of the on-disk size we're using, so 1507 * they can avoid unnecessarily writing a body for something 1508 * that we're just going to ignore. 1509 */ 1510 archive_entry_set_size(entry_original, real_size); 1511 if (pax->sparse_list == NULL && real_size > 0) { 1512 /* This is not a sparse file but we handle its data as 1513 * a sparse block. */ 1514 sparse_list_add(pax, 0, real_size); 1515 sparse_total = real_size; 1516 } 1517 pax->entry_padding = 0x1ff & (-(int64_t)sparse_total); 1518 archive_entry_free(entry_main); 1519 archive_string_free(&entry_name); 1520 1521 return (ret); 1522} 1523 1524/* 1525 * We need a valid name for the regular 'ustar' entry. This routine 1526 * tries to hack something more-or-less reasonable. 1527 * 1528 * The approach here tries to preserve leading dir names. We do so by 1529 * working with four sections: 1530 * 1) "prefix" directory names, 1531 * 2) "suffix" directory names, 1532 * 3) inserted dir name (optional), 1533 * 4) filename. 1534 * 1535 * These sections must satisfy the following requirements: 1536 * * Parts 1 & 2 together form an initial portion of the dir name. 1537 * * Part 3 is specified by the caller. (It should not contain a leading 1538 * or trailing '/'.) 1539 * * Part 4 forms an initial portion of the base filename. 1540 * * The filename must be <= 99 chars to fit the ustar 'name' field. 1541 * * Parts 2, 3, 4 together must be <= 99 chars to fit the ustar 'name' fld. 1542 * * Part 1 must be <= 155 chars to fit the ustar 'prefix' field. 1543 * * If the original name ends in a '/', the new name must also end in a '/' 1544 * * Trailing '/.' sequences may be stripped. 1545 * 1546 * Note: Recall that the ustar format does not store the '/' separating 1547 * parts 1 & 2, but does store the '/' separating parts 2 & 3. 1548 */ 1549static char * 1550build_ustar_entry_name(char *dest, const char *src, size_t src_length, 1551 const char *insert) 1552{ 1553 const char *prefix, *prefix_end; 1554 const char *suffix, *suffix_end; 1555 const char *filename, *filename_end; 1556 char *p; 1557 int need_slash = 0; /* Was there a trailing slash? */ 1558 size_t suffix_length = 99; 1559 size_t insert_length; 1560 1561 /* Length of additional dir element to be added. */ 1562 if (insert == NULL) 1563 insert_length = 0; 1564 else 1565 /* +2 here allows for '/' before and after the insert. */ 1566 insert_length = strlen(insert) + 2; 1567 1568 /* Step 0: Quick bailout in a common case. */ 1569 if (src_length < 100 && insert == NULL) { 1570 strncpy(dest, src, src_length); 1571 dest[src_length] = '\0'; 1572 return (dest); 1573 } 1574 1575 /* Step 1: Locate filename and enforce the length restriction. */ 1576 filename_end = src + src_length; 1577 /* Remove trailing '/' chars and '/.' pairs. */ 1578 for (;;) { 1579 if (filename_end > src && filename_end[-1] == '/') { 1580 filename_end --; 1581 need_slash = 1; /* Remember to restore trailing '/'. */ 1582 continue; 1583 } 1584 if (filename_end > src + 1 && filename_end[-1] == '.' 1585 && filename_end[-2] == '/') { 1586 filename_end -= 2; 1587 need_slash = 1; /* "foo/." will become "foo/" */ 1588 continue; 1589 } 1590 break; 1591 } 1592 if (need_slash) 1593 suffix_length--; 1594 /* Find start of filename. */ 1595 filename = filename_end - 1; 1596 while ((filename > src) && (*filename != '/')) 1597 filename --; 1598 if ((*filename == '/') && (filename < filename_end - 1)) 1599 filename ++; 1600 /* Adjust filename_end so that filename + insert fits in 99 chars. */ 1601 suffix_length -= insert_length; 1602 if (filename_end > filename + suffix_length) 1603 filename_end = filename + suffix_length; 1604 /* Calculate max size for "suffix" section (#3 above). */ 1605 suffix_length -= filename_end - filename; 1606 1607 /* Step 2: Locate the "prefix" section of the dirname, including 1608 * trailing '/'. */ 1609 prefix = src; 1610 prefix_end = prefix + 155; 1611 if (prefix_end > filename) 1612 prefix_end = filename; 1613 while (prefix_end > prefix && *prefix_end != '/') 1614 prefix_end--; 1615 if ((prefix_end < filename) && (*prefix_end == '/')) 1616 prefix_end++; 1617 1618 /* Step 3: Locate the "suffix" section of the dirname, 1619 * including trailing '/'. */ 1620 suffix = prefix_end; 1621 suffix_end = suffix + suffix_length; /* Enforce limit. */ 1622 if (suffix_end > filename) 1623 suffix_end = filename; 1624 if (suffix_end < suffix) 1625 suffix_end = suffix; 1626 while (suffix_end > suffix && *suffix_end != '/') 1627 suffix_end--; 1628 if ((suffix_end < filename) && (*suffix_end == '/')) 1629 suffix_end++; 1630 1631 /* Step 4: Build the new name. */ 1632 /* The OpenBSD strlcpy function is safer, but less portable. */ 1633 /* Rather than maintain two versions, just use the strncpy version. */ 1634 p = dest; 1635 if (prefix_end > prefix) { 1636 strncpy(p, prefix, prefix_end - prefix); 1637 p += prefix_end - prefix; 1638 } 1639 if (suffix_end > suffix) { 1640 strncpy(p, suffix, suffix_end - suffix); 1641 p += suffix_end - suffix; 1642 } 1643 if (insert != NULL) { 1644 /* Note: assume insert does not have leading or trailing '/' */ 1645 strcpy(p, insert); 1646 p += strlen(insert); 1647 *p++ = '/'; 1648 } 1649 strncpy(p, filename, filename_end - filename); 1650 p += filename_end - filename; 1651 if (need_slash) 1652 *p++ = '/'; 1653 *p = '\0'; 1654 1655 return (dest); 1656} 1657 1658/* 1659 * The ustar header for the pax extended attributes must have a 1660 * reasonable name: SUSv3 requires 'dirname'/PaxHeader.'pid'/'filename' 1661 * where 'pid' is the PID of the archiving process. Unfortunately, 1662 * that makes testing a pain since the output varies for each run, 1663 * so I'm sticking with the simpler 'dirname'/PaxHeader/'filename' 1664 * for now. (Someday, I'll make this settable. Then I can use the 1665 * SUS recommendation as default and test harnesses can override it 1666 * to get predictable results.) 1667 * 1668 * Joerg Schilling has argued that this is unnecessary because, in 1669 * practice, if the pax extended attributes get extracted as regular 1670 * files, no one is going to bother reading those attributes to 1671 * manually restore them. Based on this, 'star' uses 1672 * /tmp/PaxHeader/'basename' as the ustar header name. This is a 1673 * tempting argument, in part because it's simpler than the SUSv3 1674 * recommendation, but I'm not entirely convinced. I'm also 1675 * uncomfortable with the fact that "/tmp" is a Unix-ism. 1676 * 1677 * The following routine leverages build_ustar_entry_name() above and 1678 * so is simpler than you might think. It just needs to provide the 1679 * additional path element and handle a few pathological cases). 1680 */ 1681static char * 1682build_pax_attribute_name(char *dest, const char *src) 1683{ 1684 char buff[64]; 1685 const char *p; 1686 1687 /* Handle the null filename case. */ 1688 if (src == NULL || *src == '\0') { 1689 strcpy(dest, "PaxHeader/blank"); 1690 return (dest); 1691 } 1692 1693 /* Prune final '/' and other unwanted final elements. */ 1694 p = src + strlen(src); 1695 for (;;) { 1696 /* Ends in "/", remove the '/' */ 1697 if (p > src && p[-1] == '/') { 1698 --p; 1699 continue; 1700 } 1701 /* Ends in "/.", remove the '.' */ 1702 if (p > src + 1 && p[-1] == '.' 1703 && p[-2] == '/') { 1704 --p; 1705 continue; 1706 } 1707 break; 1708 } 1709 1710 /* Pathological case: After above, there was nothing left. 1711 * This includes "/." "/./." "/.//./." etc. */ 1712 if (p == src) { 1713 strcpy(dest, "/PaxHeader/rootdir"); 1714 return (dest); 1715 } 1716 1717 /* Convert unadorned "." into a suitable filename. */ 1718 if (*src == '.' && p == src + 1) { 1719 strcpy(dest, "PaxHeader/currentdir"); 1720 return (dest); 1721 } 1722 1723 /* 1724 * TODO: Push this string into the 'pax' structure to avoid 1725 * recomputing it every time. That will also open the door 1726 * to having clients override it. 1727 */ 1728#if HAVE_GETPID && 0 /* Disable this for now; see above comment. */ 1729 snprintf(buff, sizeof(buff), "PaxHeader.%d", getpid()); 1730#else 1731 /* If the platform can't fetch the pid, don't include it. */ 1732 strcpy(buff, "PaxHeader"); 1733#endif 1734 /* General case: build a ustar-compatible name adding 1735 * "/PaxHeader/". */ 1736 build_ustar_entry_name(dest, src, p - src, buff); 1737 1738 return (dest); 1739} 1740 1741/* 1742 * GNU PAX Format 1.0 requires the special name, which pattern is: 1743 * <dir>/GNUSparseFile.<pid>/<original file name> 1744 * 1745 * Since reproducible archives are more important, use 0 as pid. 1746 * 1747 * This function is used for only Sparse file, a file type of which 1748 * is regular file. 1749 */ 1750static char * 1751build_gnu_sparse_name(char *dest, const char *src) 1752{ 1753 const char *p; 1754 1755 /* Handle the null filename case. */ 1756 if (src == NULL || *src == '\0') { 1757 strcpy(dest, "GNUSparseFile/blank"); 1758 return (dest); 1759 } 1760 1761 /* Prune final '/' and other unwanted final elements. */ 1762 p = src + strlen(src); 1763 for (;;) { 1764 /* Ends in "/", remove the '/' */ 1765 if (p > src && p[-1] == '/') { 1766 --p; 1767 continue; 1768 } 1769 /* Ends in "/.", remove the '.' */ 1770 if (p > src + 1 && p[-1] == '.' 1771 && p[-2] == '/') { 1772 --p; 1773 continue; 1774 } 1775 break; 1776 } 1777 1778 /* General case: build a ustar-compatible name adding 1779 * "/GNUSparseFile/". */ 1780 build_ustar_entry_name(dest, src, p - src, "GNUSparseFile.0"); 1781 1782 return (dest); 1783} 1784 1785/* Write two null blocks for the end of archive */ 1786static int 1787archive_write_pax_close(struct archive_write *a) 1788{ 1789 return (__archive_write_nulls(a, 512 * 2)); 1790} 1791 1792static int 1793archive_write_pax_free(struct archive_write *a) 1794{ 1795 struct pax *pax; 1796 1797 pax = (struct pax *)a->format_data; 1798 if (pax == NULL) 1799 return (ARCHIVE_OK); 1800 1801 archive_string_free(&pax->pax_header); 1802 archive_string_free(&pax->sparse_map); 1803 archive_string_free(&pax->l_url_encoded_name); 1804 sparse_list_clear(pax); 1805 free(pax); 1806 a->format_data = NULL; 1807 return (ARCHIVE_OK); 1808} 1809 1810static int 1811archive_write_pax_finish_entry(struct archive_write *a) 1812{ 1813 struct pax *pax; 1814 uint64_t remaining; 1815 int ret; 1816 1817 pax = (struct pax *)a->format_data; 1818 remaining = pax->entry_bytes_remaining; 1819 if (remaining == 0) { 1820 while (pax->sparse_list) { 1821 struct sparse_block *sb; 1822 if (!pax->sparse_list->is_hole) 1823 remaining += pax->sparse_list->remaining; 1824 sb = pax->sparse_list->next; 1825 free(pax->sparse_list); 1826 pax->sparse_list = sb; 1827 } 1828 } 1829 ret = __archive_write_nulls(a, (size_t)(remaining + pax->entry_padding)); 1830 pax->entry_bytes_remaining = pax->entry_padding = 0; 1831 return (ret); 1832} 1833 1834static ssize_t 1835archive_write_pax_data(struct archive_write *a, const void *buff, size_t s) 1836{ 1837 struct pax *pax; 1838 size_t ws; 1839 size_t total; 1840 int ret; 1841 1842 pax = (struct pax *)a->format_data; 1843 1844 /* 1845 * According to GNU PAX format 1.0, write a sparse map 1846 * before the body. 1847 */ 1848 if (archive_strlen(&(pax->sparse_map))) { 1849 ret = __archive_write_output(a, pax->sparse_map.s, 1850 archive_strlen(&(pax->sparse_map))); 1851 if (ret != ARCHIVE_OK) 1852 return (ret); 1853 ret = __archive_write_nulls(a, pax->sparse_map_padding); 1854 if (ret != ARCHIVE_OK) 1855 return (ret); 1856 archive_string_empty(&(pax->sparse_map)); 1857 } 1858 1859 total = 0; 1860 while (total < s) { 1861 const unsigned char *p; 1862 1863 while (pax->sparse_list != NULL && 1864 pax->sparse_list->remaining == 0) { 1865 struct sparse_block *sb = pax->sparse_list->next; 1866 free(pax->sparse_list); 1867 pax->sparse_list = sb; 1868 } 1869 1870 if (pax->sparse_list == NULL) 1871 return (total); 1872 1873 p = ((const unsigned char *)buff) + total; 1874 ws = s - total; 1875 if (ws > pax->sparse_list->remaining) 1876 ws = (size_t)pax->sparse_list->remaining; 1877 1878 if (pax->sparse_list->is_hole) { 1879 /* Current block is hole thus we do not write 1880 * the body. */ 1881 pax->sparse_list->remaining -= ws; 1882 total += ws; 1883 continue; 1884 } 1885 1886 ret = __archive_write_output(a, p, ws); 1887 pax->sparse_list->remaining -= ws; 1888 total += ws; 1889 if (ret != ARCHIVE_OK) 1890 return (ret); 1891 } 1892 return (total); 1893} 1894 1895static int 1896has_non_ASCII(const char *_p) 1897{ 1898 const unsigned char *p = (const unsigned char *)_p; 1899 1900 if (p == NULL) 1901 return (1); 1902 while (*p != '\0' && *p < 128) 1903 p++; 1904 return (*p != '\0'); 1905} 1906 1907/* 1908 * Used by extended attribute support; encodes the name 1909 * so that there will be no '=' characters in the result. 1910 */ 1911static char * 1912url_encode(const char *in) 1913{ 1914 const char *s; 1915 char *d; 1916 size_t out_len = 0; 1917 char *out; 1918 1919 for (s = in; *s != '\0'; s++) { 1920 if (*s < 33 || *s > 126 || *s == '%' || *s == '=') { 1921 if (SIZE_MAX - out_len < 4) 1922 return (NULL); 1923 out_len += 3; 1924 } else { 1925 if (SIZE_MAX - out_len < 2) 1926 return (NULL); 1927 out_len++; 1928 } 1929 } 1930 1931 out = (char *)malloc(out_len + 1); 1932 if (out == NULL) 1933 return (NULL); 1934 1935 for (s = in, d = out; *s != '\0'; s++) { 1936 /* encode any non-printable ASCII character or '%' or '=' */ 1937 if (*s < 33 || *s > 126 || *s == '%' || *s == '=') { 1938 /* URL encoding is '%' followed by two hex digits */ 1939 *d++ = '%'; 1940 *d++ = "0123456789ABCDEF"[0x0f & (*s >> 4)]; 1941 *d++ = "0123456789ABCDEF"[0x0f & *s]; 1942 } else { 1943 *d++ = *s; 1944 } 1945 } 1946 *d = '\0'; 1947 return (out); 1948} 1949 1950/* 1951 * Encode a sequence of bytes into a C string using base-64 encoding. 1952 * 1953 * Returns a null-terminated C string allocated with malloc(); caller 1954 * is responsible for freeing the result. 1955 */ 1956static char * 1957base64_encode(const char *s, size_t len) 1958{ 1959 static const char digits[64] = 1960 { 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O', 1961 'P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d', 1962 'e','f','g','h','i','j','k','l','m','n','o','p','q','r','s', 1963 't','u','v','w','x','y','z','0','1','2','3','4','5','6','7', 1964 '8','9','+','/' }; 1965 int v; 1966 char *d, *out; 1967 1968 /* 3 bytes becomes 4 chars, but round up and allow for trailing NUL */ 1969 out = (char *)malloc((len * 4 + 2) / 3 + 1); 1970 if (out == NULL) 1971 return (NULL); 1972 d = out; 1973 1974 /* Convert each group of 3 bytes into 4 characters. */ 1975 while (len >= 3) { 1976 v = (((int)s[0] << 16) & 0xff0000) 1977 | (((int)s[1] << 8) & 0xff00) 1978 | (((int)s[2]) & 0x00ff); 1979 s += 3; 1980 len -= 3; 1981 *d++ = digits[(v >> 18) & 0x3f]; 1982 *d++ = digits[(v >> 12) & 0x3f]; 1983 *d++ = digits[(v >> 6) & 0x3f]; 1984 *d++ = digits[(v) & 0x3f]; 1985 } 1986 /* Handle final group of 1 byte (2 chars) or 2 bytes (3 chars). */ 1987 switch (len) { 1988 case 0: break; 1989 case 1: 1990 v = (((int)s[0] << 16) & 0xff0000); 1991 *d++ = digits[(v >> 18) & 0x3f]; 1992 *d++ = digits[(v >> 12) & 0x3f]; 1993 break; 1994 case 2: 1995 v = (((int)s[0] << 16) & 0xff0000) 1996 | (((int)s[1] << 8) & 0xff00); 1997 *d++ = digits[(v >> 18) & 0x3f]; 1998 *d++ = digits[(v >> 12) & 0x3f]; 1999 *d++ = digits[(v >> 6) & 0x3f]; 2000 break; 2001 } 2002 /* Add trailing NUL character so output is a valid C string. */ 2003 *d = '\0'; 2004 return (out); 2005} 2006 2007static void 2008sparse_list_clear(struct pax *pax) 2009{ 2010 while (pax->sparse_list != NULL) { 2011 struct sparse_block *sb = pax->sparse_list; 2012 pax->sparse_list = sb->next; 2013 free(sb); 2014 } 2015 pax->sparse_tail = NULL; 2016} 2017 2018static int 2019_sparse_list_add_block(struct pax *pax, int64_t offset, int64_t length, 2020 int is_hole) 2021{ 2022 struct sparse_block *sb; 2023 2024 sb = (struct sparse_block *)malloc(sizeof(*sb)); 2025 if (sb == NULL) 2026 return (ARCHIVE_FATAL); 2027 sb->next = NULL; 2028 sb->is_hole = is_hole; 2029 sb->offset = offset; 2030 sb->remaining = length; 2031 if (pax->sparse_list == NULL || pax->sparse_tail == NULL) 2032 pax->sparse_list = pax->sparse_tail = sb; 2033 else { 2034 pax->sparse_tail->next = sb; 2035 pax->sparse_tail = sb; 2036 } 2037 return (ARCHIVE_OK); 2038} 2039 2040static int 2041sparse_list_add(struct pax *pax, int64_t offset, int64_t length) 2042{ 2043 int64_t last_offset; 2044 int r; 2045 2046 if (pax->sparse_tail == NULL) 2047 last_offset = 0; 2048 else { 2049 last_offset = pax->sparse_tail->offset + 2050 pax->sparse_tail->remaining; 2051 } 2052 if (last_offset < offset) { 2053 /* Add a hole block. */ 2054 r = _sparse_list_add_block(pax, last_offset, 2055 offset - last_offset, 1); 2056 if (r != ARCHIVE_OK) 2057 return (r); 2058 } 2059 /* Add data block. */ 2060 return (_sparse_list_add_block(pax, offset, length, 0)); 2061} 2062 2063static time_t 2064get_ustar_max_mtime(void) 2065{ 2066 /* 2067 * Technically, the mtime field in the ustar header can 2068 * support 33 bits. We are using all of them to keep 2069 * tar/test/test_option_C_mtree.c simple and passing after 2038. 2070 * For platforms that use signed 32-bit time values we 2071 * use the 32-bit maximum. 2072 */ 2073 if (sizeof(time_t) > sizeof(int32_t)) 2074 return (time_t)0x1ffffffff; 2075 else 2076 return (time_t)0x7fffffff; 2077} 2078