archive_write_set_format_pax.c revision 313927
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: stable/10/contrib/libarchive/libarchive/archive_write_set_format_pax.c 313927 2017-02-18 21:59:19Z mm $"); 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 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); 102 103/* 104 * Set output format to 'restricted pax' format. 105 * 106 * This is the same as normal 'pax', but tries to suppress 107 * the pax header whenever possible. This is the default for 108 * bsdtar, for instance. 109 */ 110int 111archive_write_set_format_pax_restricted(struct archive *_a) 112{ 113 struct archive_write *a = (struct archive_write *)_a; 114 int r; 115 116 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 117 ARCHIVE_STATE_NEW, "archive_write_set_format_pax_restricted"); 118 119 r = archive_write_set_format_pax(&a->archive); 120 a->archive.archive_format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 121 a->archive.archive_format_name = "restricted POSIX pax interchange"; 122 return (r); 123} 124 125/* 126 * Set output format to 'pax' format. 127 */ 128int 129archive_write_set_format_pax(struct archive *_a) 130{ 131 struct archive_write *a = (struct archive_write *)_a; 132 struct pax *pax; 133 134 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, 135 ARCHIVE_STATE_NEW, "archive_write_set_format_pax"); 136 137 if (a->format_free != NULL) 138 (a->format_free)(a); 139 140 pax = (struct pax *)calloc(1, sizeof(*pax)); 141 if (pax == NULL) { 142 archive_set_error(&a->archive, ENOMEM, 143 "Can't allocate pax data"); 144 return (ARCHIVE_FATAL); 145 } 146 pax->flags = WRITE_LIBARCHIVE_XATTR | WRITE_SCHILY_XATTR; 147 148 a->format_data = pax; 149 a->format_name = "pax"; 150 a->format_options = archive_write_pax_options; 151 a->format_write_header = archive_write_pax_header; 152 a->format_write_data = archive_write_pax_data; 153 a->format_close = archive_write_pax_close; 154 a->format_free = archive_write_pax_free; 155 a->format_finish_entry = archive_write_pax_finish_entry; 156 a->archive.archive_format = ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE; 157 a->archive.archive_format_name = "POSIX pax interchange"; 158 return (ARCHIVE_OK); 159} 160 161static int 162archive_write_pax_options(struct archive_write *a, const char *key, 163 const char *val) 164{ 165 struct pax *pax = (struct pax *)a->format_data; 166 int ret = ARCHIVE_FAILED; 167 168 if (strcmp(key, "hdrcharset") == 0) { 169 /* 170 * The character-set we can use are defined in 171 * IEEE Std 1003.1-2001 172 */ 173 if (val == NULL || val[0] == 0) 174 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 175 "pax: hdrcharset option needs a character-set name"); 176 else if (strcmp(val, "BINARY") == 0 || 177 strcmp(val, "binary") == 0) { 178 /* 179 * Specify binary mode. We will not convert 180 * filenames, uname and gname to any charsets. 181 */ 182 pax->opt_binary = 1; 183 ret = ARCHIVE_OK; 184 } else if (strcmp(val, "UTF-8") == 0) { 185 /* 186 * Specify UTF-8 character-set to be used for 187 * filenames. This is almost the test that 188 * running platform supports the string conversion. 189 * Especially libarchive_test needs this trick for 190 * its test. 191 */ 192 pax->sconv_utf8 = archive_string_conversion_to_charset( 193 &(a->archive), "UTF-8", 0); 194 if (pax->sconv_utf8 == NULL) 195 ret = ARCHIVE_FATAL; 196 else 197 ret = ARCHIVE_OK; 198 } else 199 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 200 "pax: invalid charset name"); 201 return (ret); 202 } 203 204 /* Note: The "warn" return is just to inform the options 205 * supervisor that we didn't handle it. It will generate 206 * a suitable error if no one used this option. */ 207 return (ARCHIVE_WARN); 208} 209 210/* 211 * Note: This code assumes that 'nanos' has the same sign as 'sec', 212 * which implies that sec=-1, nanos=200000000 represents -1.2 seconds 213 * and not -0.8 seconds. This is a pretty pedantic point, as we're 214 * unlikely to encounter many real files created before Jan 1, 1970, 215 * much less ones with timestamps recorded to sub-second resolution. 216 */ 217static void 218add_pax_attr_time(struct archive_string *as, const char *key, 219 int64_t sec, unsigned long nanos) 220{ 221 int digit, i; 222 char *t; 223 /* 224 * Note that each byte contributes fewer than 3 base-10 225 * digits, so this will always be big enough. 226 */ 227 char tmp[1 + 3*sizeof(sec) + 1 + 3*sizeof(nanos)]; 228 229 tmp[sizeof(tmp) - 1] = 0; 230 t = tmp + sizeof(tmp) - 1; 231 232 /* Skip trailing zeros in the fractional part. */ 233 for (digit = 0, i = 10; i > 0 && digit == 0; i--) { 234 digit = nanos % 10; 235 nanos /= 10; 236 } 237 238 /* Only format the fraction if it's non-zero. */ 239 if (i > 0) { 240 while (i > 0) { 241 *--t = "0123456789"[digit]; 242 digit = nanos % 10; 243 nanos /= 10; 244 i--; 245 } 246 *--t = '.'; 247 } 248 t = format_int(t, sec); 249 250 add_pax_attr(as, key, t); 251} 252 253static char * 254format_int(char *t, int64_t i) 255{ 256 uint64_t ui; 257 258 if (i < 0) 259 ui = (i == INT64_MIN) ? (uint64_t)(INT64_MAX) + 1 : (uint64_t)(-i); 260 else 261 ui = i; 262 263 do { 264 *--t = "0123456789"[ui % 10]; 265 } while (ui /= 10); 266 if (i < 0) 267 *--t = '-'; 268 return (t); 269} 270 271static void 272add_pax_attr_int(struct archive_string *as, const char *key, int64_t value) 273{ 274 char tmp[1 + 3 * sizeof(value)]; 275 276 tmp[sizeof(tmp) - 1] = 0; 277 add_pax_attr(as, key, format_int(tmp + sizeof(tmp) - 1, value)); 278} 279 280/* 281 * Add a key/value attribute to the pax header. This function handles 282 * the length field and various other syntactic requirements. 283 */ 284static void 285add_pax_attr(struct archive_string *as, const char *key, const char *value) 286{ 287 add_pax_attr_binary(as, key, value, strlen(value)); 288} 289 290/* 291 * Add a key/value attribute to the pax header. This function handles 292 * binary values. 293 */ 294static void 295add_pax_attr_binary(struct archive_string *as, const char *key, 296 const char *value, size_t value_len) 297{ 298 int digits, i, len, next_ten; 299 char tmp[1 + 3 * sizeof(int)]; /* < 3 base-10 digits per byte */ 300 301 /*- 302 * PAX attributes have the following layout: 303 * <len> <space> <key> <=> <value> <nl> 304 */ 305 len = 1 + (int)strlen(key) + 1 + (int)value_len + 1; 306 307 /* 308 * The <len> field includes the length of the <len> field, so 309 * computing the correct length is tricky. I start by 310 * counting the number of base-10 digits in 'len' and 311 * computing the next higher power of 10. 312 */ 313 next_ten = 1; 314 digits = 0; 315 i = len; 316 while (i > 0) { 317 i = i / 10; 318 digits++; 319 next_ten = next_ten * 10; 320 } 321 /* 322 * For example, if string without the length field is 99 323 * chars, then adding the 2 digit length "99" will force the 324 * total length past 100, requiring an extra digit. The next 325 * statement adjusts for this effect. 326 */ 327 if (len + digits >= next_ten) 328 digits++; 329 330 /* Now, we have the right length so we can build the line. */ 331 tmp[sizeof(tmp) - 1] = 0; /* Null-terminate the work area. */ 332 archive_strcat(as, format_int(tmp + sizeof(tmp) - 1, len + digits)); 333 archive_strappend_char(as, ' '); 334 archive_strcat(as, key); 335 archive_strappend_char(as, '='); 336 archive_array_append(as, value, value_len); 337 archive_strappend_char(as, '\n'); 338} 339 340static void 341archive_write_pax_header_xattr(struct pax *pax, const char *encoded_name, 342 const void *value, size_t value_len) 343{ 344 struct archive_string s; 345 char *encoded_value; 346 347 if (pax->flags & WRITE_LIBARCHIVE_XATTR) { 348 encoded_value = base64_encode((const char *)value, value_len); 349 350 if (encoded_name != NULL && encoded_value != NULL) { 351 archive_string_init(&s); 352 archive_strcpy(&s, "LIBARCHIVE.xattr."); 353 archive_strcat(&s, encoded_name); 354 add_pax_attr(&(pax->pax_header), s.s, encoded_value); 355 archive_string_free(&s); 356 } 357 free(encoded_value); 358 } 359 if (pax->flags & WRITE_SCHILY_XATTR) { 360 archive_string_init(&s); 361 archive_strcpy(&s, "SCHILY.xattr."); 362 archive_strcat(&s, encoded_name); 363 add_pax_attr_binary(&(pax->pax_header), s.s, value, value_len); 364 archive_string_free(&s); 365 } 366} 367 368static int 369archive_write_pax_header_xattrs(struct archive_write *a, 370 struct pax *pax, struct archive_entry *entry) 371{ 372 int i = archive_entry_xattr_reset(entry); 373 374 while (i--) { 375 const char *name; 376 const void *value; 377 char *url_encoded_name = NULL, *encoded_name = NULL; 378 size_t size; 379 int r; 380 381 archive_entry_xattr_next(entry, &name, &value, &size); 382 url_encoded_name = url_encode(name); 383 if (url_encoded_name != NULL) { 384 /* Convert narrow-character to UTF-8. */ 385 r = archive_strcpy_l(&(pax->l_url_encoded_name), 386 url_encoded_name, pax->sconv_utf8); 387 free(url_encoded_name); /* Done with this. */ 388 if (r == 0) 389 encoded_name = pax->l_url_encoded_name.s; 390 else if (errno == ENOMEM) { 391 archive_set_error(&a->archive, ENOMEM, 392 "Can't allocate memory for Linkname"); 393 return (ARCHIVE_FATAL); 394 } 395 } 396 397 archive_write_pax_header_xattr(pax, encoded_name, 398 value, size); 399 400 } 401 return (ARCHIVE_OK); 402} 403 404static int 405get_entry_hardlink(struct archive_write *a, struct archive_entry *entry, 406 const char **name, size_t *length, struct archive_string_conv *sc) 407{ 408 int r; 409 410 r = archive_entry_hardlink_l(entry, name, length, sc); 411 if (r != 0) { 412 if (errno == ENOMEM) { 413 archive_set_error(&a->archive, ENOMEM, 414 "Can't allocate memory for Linkname"); 415 return (ARCHIVE_FATAL); 416 } 417 return (ARCHIVE_WARN); 418 } 419 return (ARCHIVE_OK); 420} 421 422static int 423get_entry_pathname(struct archive_write *a, struct archive_entry *entry, 424 const char **name, size_t *length, struct archive_string_conv *sc) 425{ 426 int r; 427 428 r = archive_entry_pathname_l(entry, name, length, sc); 429 if (r != 0) { 430 if (errno == ENOMEM) { 431 archive_set_error(&a->archive, ENOMEM, 432 "Can't allocate memory for Pathname"); 433 return (ARCHIVE_FATAL); 434 } 435 return (ARCHIVE_WARN); 436 } 437 return (ARCHIVE_OK); 438} 439 440static int 441get_entry_uname(struct archive_write *a, struct archive_entry *entry, 442 const char **name, size_t *length, struct archive_string_conv *sc) 443{ 444 int r; 445 446 r = archive_entry_uname_l(entry, name, length, sc); 447 if (r != 0) { 448 if (errno == ENOMEM) { 449 archive_set_error(&a->archive, ENOMEM, 450 "Can't allocate memory for Uname"); 451 return (ARCHIVE_FATAL); 452 } 453 return (ARCHIVE_WARN); 454 } 455 return (ARCHIVE_OK); 456} 457 458static int 459get_entry_gname(struct archive_write *a, struct archive_entry *entry, 460 const char **name, size_t *length, struct archive_string_conv *sc) 461{ 462 int r; 463 464 r = archive_entry_gname_l(entry, name, length, sc); 465 if (r != 0) { 466 if (errno == ENOMEM) { 467 archive_set_error(&a->archive, ENOMEM, 468 "Can't allocate memory for Gname"); 469 return (ARCHIVE_FATAL); 470 } 471 return (ARCHIVE_WARN); 472 } 473 return (ARCHIVE_OK); 474} 475 476static int 477get_entry_symlink(struct archive_write *a, struct archive_entry *entry, 478 const char **name, size_t *length, struct archive_string_conv *sc) 479{ 480 int r; 481 482 r = archive_entry_symlink_l(entry, name, length, sc); 483 if (r != 0) { 484 if (errno == ENOMEM) { 485 archive_set_error(&a->archive, ENOMEM, 486 "Can't allocate memory for Linkname"); 487 return (ARCHIVE_FATAL); 488 } 489 return (ARCHIVE_WARN); 490 } 491 return (ARCHIVE_OK); 492} 493 494/* Add ACL to pax header */ 495static int 496add_pax_acl(struct archive_write *a, 497 struct archive_entry *entry, struct pax *pax, int flags) 498{ 499 char *p; 500 const char *attr; 501 int acl_types; 502 503 acl_types = archive_entry_acl_types(entry); 504 505 if ((acl_types & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) 506 attr = "SCHILY.acl.ace"; 507 else if ((flags & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) != 0) 508 attr = "SCHILY.acl.access"; 509 else if ((flags & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) != 0) 510 attr = "SCHILY.acl.default"; 511 else 512 return (ARCHIVE_FATAL); 513 514 p = archive_entry_acl_to_text_l(entry, NULL, flags, pax->sconv_utf8); 515 if (p == NULL) { 516 if (errno == ENOMEM) { 517 archive_set_error(&a->archive, ENOMEM, "%s %s", 518 "Can't allocate memory for ", attr); 519 return (ARCHIVE_FATAL); 520 } 521 archive_set_error(&a->archive, 522 ARCHIVE_ERRNO_FILE_FORMAT, "%s %s %s", 523 "Can't translate ", attr, " to UTF-8"); 524 return(ARCHIVE_WARN); 525 } else if (*p != '\0') { 526 add_pax_attr(&(pax->pax_header), 527 attr, p); 528 free(p); 529 } 530 return(ARCHIVE_OK); 531} 532 533/* 534 * TODO: Consider adding 'comment' and 'charset' fields to 535 * archive_entry so that clients can specify them. Also, consider 536 * adding generic key/value tags so clients can add arbitrary 537 * key/value data. 538 * 539 * TODO: Break up this 700-line function!!!! Yowza! 540 */ 541static int 542archive_write_pax_header(struct archive_write *a, 543 struct archive_entry *entry_original) 544{ 545 struct archive_entry *entry_main; 546 const char *p; 547 const char *suffix; 548 int need_extension, r, ret; 549 int acl_types; 550 int sparse_count; 551 uint64_t sparse_total, real_size; 552 struct pax *pax; 553 const char *hardlink; 554 const char *path = NULL, *linkpath = NULL; 555 const char *uname = NULL, *gname = NULL; 556 const void *mac_metadata; 557 size_t mac_metadata_size; 558 struct archive_string_conv *sconv; 559 size_t hardlink_length, path_length, linkpath_length; 560 size_t uname_length, gname_length; 561 562 char paxbuff[512]; 563 char ustarbuff[512]; 564 char ustar_entry_name[256]; 565 char pax_entry_name[256]; 566 char gnu_sparse_name[256]; 567 struct archive_string entry_name; 568 569 ret = ARCHIVE_OK; 570 need_extension = 0; 571 pax = (struct pax *)a->format_data; 572 573 /* Sanity check. */ 574 if (archive_entry_pathname(entry_original) == NULL) { 575 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 576 "Can't record entry in tar file without pathname"); 577 return (ARCHIVE_FAILED); 578 } 579 580 /* 581 * Choose a header encoding. 582 */ 583 if (pax->opt_binary) 584 sconv = NULL;/* Binary mode. */ 585 else { 586 /* Header encoding is UTF-8. */ 587 if (pax->sconv_utf8 == NULL) { 588 /* Initialize the string conversion object 589 * we must need */ 590 pax->sconv_utf8 = archive_string_conversion_to_charset( 591 &(a->archive), "UTF-8", 1); 592 if (pax->sconv_utf8 == NULL) 593 /* Couldn't allocate memory */ 594 return (ARCHIVE_FAILED); 595 } 596 sconv = pax->sconv_utf8; 597 } 598 599 r = get_entry_hardlink(a, entry_original, &hardlink, 600 &hardlink_length, sconv); 601 if (r == ARCHIVE_FATAL) 602 return (r); 603 else if (r != ARCHIVE_OK) { 604 r = get_entry_hardlink(a, entry_original, &hardlink, 605 &hardlink_length, NULL); 606 if (r == ARCHIVE_FATAL) 607 return (r); 608 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 609 "Can't translate linkname '%s' to %s", hardlink, 610 archive_string_conversion_charset_name(sconv)); 611 ret = ARCHIVE_WARN; 612 sconv = NULL;/* The header charset switches to binary mode. */ 613 } 614 615 /* Make sure this is a type of entry that we can handle here */ 616 if (hardlink == NULL) { 617 switch (archive_entry_filetype(entry_original)) { 618 case AE_IFBLK: 619 case AE_IFCHR: 620 case AE_IFIFO: 621 case AE_IFLNK: 622 case AE_IFREG: 623 break; 624 case AE_IFDIR: 625 { 626 /* 627 * Ensure a trailing '/'. Modify the original 628 * entry so the client sees the change. 629 */ 630#if defined(_WIN32) && !defined(__CYGWIN__) 631 const wchar_t *wp; 632 633 wp = archive_entry_pathname_w(entry_original); 634 if (wp != NULL && wp[wcslen(wp) -1] != L'/') { 635 struct archive_wstring ws; 636 637 archive_string_init(&ws); 638 path_length = wcslen(wp); 639 if (archive_wstring_ensure(&ws, 640 path_length + 2) == NULL) { 641 archive_set_error(&a->archive, ENOMEM, 642 "Can't allocate pax data"); 643 archive_wstring_free(&ws); 644 return(ARCHIVE_FATAL); 645 } 646 /* Should we keep '\' ? */ 647 if (wp[path_length -1] == L'\\') 648 path_length--; 649 archive_wstrncpy(&ws, wp, path_length); 650 archive_wstrappend_wchar(&ws, L'/'); 651 archive_entry_copy_pathname_w( 652 entry_original, ws.s); 653 archive_wstring_free(&ws); 654 p = NULL; 655 } else 656#endif 657 p = archive_entry_pathname(entry_original); 658 /* 659 * On Windows, this is a backup operation just in 660 * case getting WCS failed. On POSIX, this is a 661 * normal operation. 662 */ 663 if (p != NULL && p[strlen(p) - 1] != '/') { 664 struct archive_string as; 665 666 archive_string_init(&as); 667 path_length = strlen(p); 668 if (archive_string_ensure(&as, 669 path_length + 2) == NULL) { 670 archive_set_error(&a->archive, ENOMEM, 671 "Can't allocate pax data"); 672 archive_string_free(&as); 673 return(ARCHIVE_FATAL); 674 } 675#if defined(_WIN32) && !defined(__CYGWIN__) 676 /* NOTE: This might break the pathname 677 * if the current code page is CP932 and 678 * the pathname includes a character '\' 679 * as a part of its multibyte pathname. */ 680 if (p[strlen(p) -1] == '\\') 681 path_length--; 682 else 683#endif 684 archive_strncpy(&as, p, path_length); 685 archive_strappend_char(&as, '/'); 686 archive_entry_copy_pathname( 687 entry_original, as.s); 688 archive_string_free(&as); 689 } 690 break; 691 } 692 case AE_IFSOCK: 693 archive_set_error(&a->archive, 694 ARCHIVE_ERRNO_FILE_FORMAT, 695 "tar format cannot archive socket"); 696 return (ARCHIVE_FAILED); 697 default: 698 archive_set_error(&a->archive, 699 ARCHIVE_ERRNO_FILE_FORMAT, 700 "tar format cannot archive this (type=0%lo)", 701 (unsigned long) 702 archive_entry_filetype(entry_original)); 703 return (ARCHIVE_FAILED); 704 } 705 } 706 707 /* 708 * If Mac OS metadata blob is here, recurse to write that 709 * as a separate entry. This is really a pretty poor design: 710 * In particular, it doubles the overhead for long filenames. 711 * TODO: Help Apple folks design something better and figure 712 * out how to transition from this legacy format. 713 * 714 * Note that this code is present on every platform; clients 715 * on non-Mac are unlikely to ever provide this data, but 716 * applications that copy entries from one archive to another 717 * should not lose data just because the local filesystem 718 * can't store it. 719 */ 720 mac_metadata = 721 archive_entry_mac_metadata(entry_original, &mac_metadata_size); 722 if (mac_metadata != NULL) { 723 const char *oname; 724 char *name, *bname; 725 size_t name_length; 726 struct archive_entry *extra = archive_entry_new2(&a->archive); 727 728 oname = archive_entry_pathname(entry_original); 729 name_length = strlen(oname); 730 name = malloc(name_length + 3); 731 if (name == NULL || extra == NULL) { 732 /* XXX error message */ 733 archive_entry_free(extra); 734 free(name); 735 return (ARCHIVE_FAILED); 736 } 737 strcpy(name, oname); 738 /* Find last '/'; strip trailing '/' characters */ 739 bname = strrchr(name, '/'); 740 while (bname != NULL && bname[1] == '\0') { 741 *bname = '\0'; 742 bname = strrchr(name, '/'); 743 } 744 if (bname == NULL) { 745 memmove(name + 2, name, name_length + 1); 746 memmove(name, "._", 2); 747 } else { 748 bname += 1; 749 memmove(bname + 2, bname, strlen(bname) + 1); 750 memmove(bname, "._", 2); 751 } 752 archive_entry_copy_pathname(extra, name); 753 free(name); 754 755 archive_entry_set_size(extra, mac_metadata_size); 756 archive_entry_set_filetype(extra, AE_IFREG); 757 archive_entry_set_perm(extra, 758 archive_entry_perm(entry_original)); 759 archive_entry_set_mtime(extra, 760 archive_entry_mtime(entry_original), 761 archive_entry_mtime_nsec(entry_original)); 762 archive_entry_set_gid(extra, 763 archive_entry_gid(entry_original)); 764 archive_entry_set_gname(extra, 765 archive_entry_gname(entry_original)); 766 archive_entry_set_uid(extra, 767 archive_entry_uid(entry_original)); 768 archive_entry_set_uname(extra, 769 archive_entry_uname(entry_original)); 770 771 /* Recurse to write the special copyfile entry. */ 772 r = archive_write_pax_header(a, extra); 773 archive_entry_free(extra); 774 if (r < ARCHIVE_WARN) 775 return (r); 776 if (r < ret) 777 ret = r; 778 r = (int)archive_write_pax_data(a, mac_metadata, 779 mac_metadata_size); 780 if (r < ARCHIVE_WARN) 781 return (r); 782 if (r < ret) 783 ret = r; 784 r = archive_write_pax_finish_entry(a); 785 if (r < ARCHIVE_WARN) 786 return (r); 787 if (r < ret) 788 ret = r; 789 } 790 791 /* Copy entry so we can modify it as needed. */ 792#if defined(_WIN32) && !defined(__CYGWIN__) 793 /* Make sure the path separators in pathname, hardlink and symlink 794 * are all slash '/', not the Windows path separator '\'. */ 795 entry_main = __la_win_entry_in_posix_pathseparator(entry_original); 796 if (entry_main == entry_original) 797 entry_main = archive_entry_clone(entry_original); 798#else 799 entry_main = archive_entry_clone(entry_original); 800#endif 801 if (entry_main == NULL) { 802 archive_set_error(&a->archive, ENOMEM, 803 "Can't allocate pax data"); 804 return(ARCHIVE_FATAL); 805 } 806 archive_string_empty(&(pax->pax_header)); /* Blank our work area. */ 807 archive_string_empty(&(pax->sparse_map)); 808 sparse_total = 0; 809 sparse_list_clear(pax); 810 811 if (hardlink == NULL && 812 archive_entry_filetype(entry_main) == AE_IFREG) 813 sparse_count = archive_entry_sparse_reset(entry_main); 814 else 815 sparse_count = 0; 816 if (sparse_count) { 817 int64_t offset, length, last_offset = 0; 818 /* Get the last entry of sparse block. */ 819 while (archive_entry_sparse_next( 820 entry_main, &offset, &length) == ARCHIVE_OK) 821 last_offset = offset + length; 822 823 /* If the last sparse block does not reach the end of file, 824 * We have to add a empty sparse block as the last entry to 825 * manage storing file data. */ 826 if (last_offset < archive_entry_size(entry_main)) 827 archive_entry_sparse_add_entry(entry_main, 828 archive_entry_size(entry_main), 0); 829 sparse_count = archive_entry_sparse_reset(entry_main); 830 } 831 832 /* 833 * First, check the name fields and see if any of them 834 * require binary coding. If any of them does, then all of 835 * them do. 836 */ 837 r = get_entry_pathname(a, entry_main, &path, &path_length, sconv); 838 if (r == ARCHIVE_FATAL) 839 return (r); 840 else if (r != ARCHIVE_OK) { 841 r = get_entry_pathname(a, entry_main, &path, 842 &path_length, NULL); 843 if (r == ARCHIVE_FATAL) 844 return (r); 845 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 846 "Can't translate pathname '%s' to %s", path, 847 archive_string_conversion_charset_name(sconv)); 848 ret = ARCHIVE_WARN; 849 sconv = NULL;/* The header charset switches to binary mode. */ 850 } 851 r = get_entry_uname(a, entry_main, &uname, &uname_length, sconv); 852 if (r == ARCHIVE_FATAL) 853 return (r); 854 else if (r != ARCHIVE_OK) { 855 r = get_entry_uname(a, entry_main, &uname, &uname_length, NULL); 856 if (r == ARCHIVE_FATAL) 857 return (r); 858 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 859 "Can't translate uname '%s' to %s", uname, 860 archive_string_conversion_charset_name(sconv)); 861 ret = ARCHIVE_WARN; 862 sconv = NULL;/* The header charset switches to binary mode. */ 863 } 864 r = get_entry_gname(a, entry_main, &gname, &gname_length, sconv); 865 if (r == ARCHIVE_FATAL) 866 return (r); 867 else if (r != ARCHIVE_OK) { 868 r = get_entry_gname(a, entry_main, &gname, &gname_length, NULL); 869 if (r == ARCHIVE_FATAL) 870 return (r); 871 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, 872 "Can't translate gname '%s' to %s", gname, 873 archive_string_conversion_charset_name(sconv)); 874 ret = ARCHIVE_WARN; 875 sconv = NULL;/* The header charset switches to binary mode. */ 876 } 877 linkpath = hardlink; 878 linkpath_length = hardlink_length; 879 if (linkpath == NULL) { 880 r = get_entry_symlink(a, entry_main, &linkpath, 881 &linkpath_length, sconv); 882 if (r == ARCHIVE_FATAL) 883 return (r); 884 else if (r != ARCHIVE_OK) { 885 r = get_entry_symlink(a, entry_main, &linkpath, 886 &linkpath_length, NULL); 887 if (r == ARCHIVE_FATAL) 888 return (r); 889 archive_set_error(&a->archive, 890 ARCHIVE_ERRNO_FILE_FORMAT, 891 "Can't translate linkname '%s' to %s", linkpath, 892 archive_string_conversion_charset_name(sconv)); 893 ret = ARCHIVE_WARN; 894 sconv = NULL; 895 } 896 } 897 898 /* If any string conversions failed, get all attributes 899 * in binary-mode. */ 900 if (sconv == NULL && !pax->opt_binary) { 901 if (hardlink != NULL) { 902 r = get_entry_hardlink(a, entry_main, &hardlink, 903 &hardlink_length, NULL); 904 if (r == ARCHIVE_FATAL) 905 return (r); 906 linkpath = hardlink; 907 linkpath_length = hardlink_length; 908 } 909 r = get_entry_pathname(a, entry_main, &path, 910 &path_length, NULL); 911 if (r == ARCHIVE_FATAL) 912 return (r); 913 r = get_entry_uname(a, entry_main, &uname, &uname_length, NULL); 914 if (r == ARCHIVE_FATAL) 915 return (r); 916 r = get_entry_gname(a, entry_main, &gname, &gname_length, NULL); 917 if (r == ARCHIVE_FATAL) 918 return (r); 919 } 920 921 /* Store the header encoding first, to be nice to readers. */ 922 if (sconv == NULL) 923 add_pax_attr(&(pax->pax_header), "hdrcharset", "BINARY"); 924 925 926 /* 927 * If name is too long, or has non-ASCII characters, add 928 * 'path' to pax extended attrs. (Note that an unconvertible 929 * name must have non-ASCII characters.) 930 */ 931 if (has_non_ASCII(path)) { 932 /* We have non-ASCII characters. */ 933 add_pax_attr(&(pax->pax_header), "path", path); 934 archive_entry_set_pathname(entry_main, 935 build_ustar_entry_name(ustar_entry_name, 936 path, path_length, NULL)); 937 need_extension = 1; 938 } else { 939 /* We have an all-ASCII path; we'd like to just store 940 * it in the ustar header if it will fit. Yes, this 941 * duplicates some of the logic in 942 * archive_write_set_format_ustar.c 943 */ 944 if (path_length <= 100) { 945 /* Fits in the old 100-char tar name field. */ 946 } else { 947 /* Find largest suffix that will fit. */ 948 /* Note: strlen() > 100, so strlen() - 100 - 1 >= 0 */ 949 suffix = strchr(path + path_length - 100 - 1, '/'); 950 /* Don't attempt an empty prefix. */ 951 if (suffix == path) 952 suffix = strchr(suffix + 1, '/'); 953 /* We can put it in the ustar header if it's 954 * all ASCII and it's either <= 100 characters 955 * or can be split at a '/' into a prefix <= 956 * 155 chars and a suffix <= 100 chars. (Note 957 * the strchr() above will return NULL exactly 958 * when the path can't be split.) 959 */ 960 if (suffix == NULL /* Suffix > 100 chars. */ 961 || suffix[1] == '\0' /* empty suffix */ 962 || suffix - path > 155) /* Prefix > 155 chars */ 963 { 964 add_pax_attr(&(pax->pax_header), "path", path); 965 archive_entry_set_pathname(entry_main, 966 build_ustar_entry_name(ustar_entry_name, 967 path, path_length, NULL)); 968 need_extension = 1; 969 } 970 } 971 } 972 973 if (linkpath != NULL) { 974 /* If link name is too long or has non-ASCII characters, add 975 * 'linkpath' to pax extended attrs. */ 976 if (linkpath_length > 100 || has_non_ASCII(linkpath)) { 977 add_pax_attr(&(pax->pax_header), "linkpath", linkpath); 978 if (linkpath_length > 100) { 979 if (hardlink != NULL) 980 archive_entry_set_hardlink(entry_main, 981 "././@LongHardLink"); 982 else 983 archive_entry_set_symlink(entry_main, 984 "././@LongSymLink"); 985 } 986 need_extension = 1; 987 } 988 } 989 /* Save a pathname since it will be renamed if `entry_main` has 990 * sparse blocks. */ 991 archive_string_init(&entry_name); 992 archive_strcpy(&entry_name, archive_entry_pathname(entry_main)); 993 994 /* If file size is too large, add 'size' to pax extended attrs. */ 995 if (archive_entry_size(entry_main) >= (((int64_t)1) << 33)) { 996 add_pax_attr_int(&(pax->pax_header), "size", 997 archive_entry_size(entry_main)); 998 need_extension = 1; 999 } 1000 1001 /* If numeric GID is too large, add 'gid' to pax extended attrs. */ 1002 if ((unsigned int)archive_entry_gid(entry_main) >= (1 << 18)) { 1003 add_pax_attr_int(&(pax->pax_header), "gid", 1004 archive_entry_gid(entry_main)); 1005 need_extension = 1; 1006 } 1007 1008 /* If group name is too large or has non-ASCII characters, add 1009 * 'gname' to pax extended attrs. */ 1010 if (gname != NULL) { 1011 if (gname_length > 31 || has_non_ASCII(gname)) { 1012 add_pax_attr(&(pax->pax_header), "gname", gname); 1013 need_extension = 1; 1014 } 1015 } 1016 1017 /* If numeric UID is too large, add 'uid' to pax extended attrs. */ 1018 if ((unsigned int)archive_entry_uid(entry_main) >= (1 << 18)) { 1019 add_pax_attr_int(&(pax->pax_header), "uid", 1020 archive_entry_uid(entry_main)); 1021 need_extension = 1; 1022 } 1023 1024 /* Add 'uname' to pax extended attrs if necessary. */ 1025 if (uname != NULL) { 1026 if (uname_length > 31 || has_non_ASCII(uname)) { 1027 add_pax_attr(&(pax->pax_header), "uname", uname); 1028 need_extension = 1; 1029 } 1030 } 1031 1032 /* 1033 * POSIX/SUSv3 doesn't provide a standard key for large device 1034 * numbers. I use the same keys here that Joerg Schilling 1035 * used for 'star.' (Which, somewhat confusingly, are called 1036 * "devXXX" even though they code "rdev" values.) No doubt, 1037 * other implementations use other keys. Note that there's no 1038 * reason we can't write the same information into a number of 1039 * different keys. 1040 * 1041 * Of course, this is only needed for block or char device entries. 1042 */ 1043 if (archive_entry_filetype(entry_main) == AE_IFBLK 1044 || archive_entry_filetype(entry_main) == AE_IFCHR) { 1045 /* 1046 * If rdevmajor is too large, add 'SCHILY.devmajor' to 1047 * extended attributes. 1048 */ 1049 int rdevmajor, rdevminor; 1050 rdevmajor = archive_entry_rdevmajor(entry_main); 1051 rdevminor = archive_entry_rdevminor(entry_main); 1052 if (rdevmajor >= (1 << 18)) { 1053 add_pax_attr_int(&(pax->pax_header), "SCHILY.devmajor", 1054 rdevmajor); 1055 /* 1056 * Non-strict formatting below means we don't 1057 * have to truncate here. Not truncating improves 1058 * the chance that some more modern tar archivers 1059 * (such as GNU tar 1.13) can restore the full 1060 * value even if they don't understand the pax 1061 * extended attributes. See my rant below about 1062 * file size fields for additional details. 1063 */ 1064 /* archive_entry_set_rdevmajor(entry_main, 1065 rdevmajor & ((1 << 18) - 1)); */ 1066 need_extension = 1; 1067 } 1068 1069 /* 1070 * If devminor is too large, add 'SCHILY.devminor' to 1071 * extended attributes. 1072 */ 1073 if (rdevminor >= (1 << 18)) { 1074 add_pax_attr_int(&(pax->pax_header), "SCHILY.devminor", 1075 rdevminor); 1076 /* Truncation is not necessary here, either. */ 1077 /* archive_entry_set_rdevminor(entry_main, 1078 rdevminor & ((1 << 18) - 1)); */ 1079 need_extension = 1; 1080 } 1081 } 1082 1083 /* 1084 * Technically, the mtime field in the ustar header can 1085 * support 33 bits, but many platforms use signed 32-bit time 1086 * values. The cutoff of 0x7fffffff here is a compromise. 1087 * Yes, this check is duplicated just below; this helps to 1088 * avoid writing an mtime attribute just to handle a 1089 * high-resolution timestamp in "restricted pax" mode. 1090 */ 1091 if (!need_extension && 1092 ((archive_entry_mtime(entry_main) < 0) 1093 || (archive_entry_mtime(entry_main) >= 0x7fffffff))) 1094 need_extension = 1; 1095 1096 /* I use a star-compatible file flag attribute. */ 1097 p = archive_entry_fflags_text(entry_main); 1098 if (!need_extension && p != NULL && *p != '\0') 1099 need_extension = 1; 1100 1101 /* If there are extended attributes, we need an extension */ 1102 if (!need_extension && archive_entry_xattr_count(entry_original) > 0) 1103 need_extension = 1; 1104 1105 /* If there are sparse info, we need an extension */ 1106 if (!need_extension && sparse_count > 0) 1107 need_extension = 1; 1108 1109 acl_types = archive_entry_acl_types(entry_original); 1110 1111 /* If there are any ACL entries, we need an extension */ 1112 if (!need_extension && acl_types != 0) 1113 need_extension = 1; 1114 1115 /* 1116 * Libarchive used to include these in extended headers for 1117 * restricted pax format, but that confused people who 1118 * expected ustar-like time semantics. So now we only include 1119 * them in full pax format. 1120 */ 1121 if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_RESTRICTED) { 1122 if (archive_entry_ctime(entry_main) != 0 || 1123 archive_entry_ctime_nsec(entry_main) != 0) 1124 add_pax_attr_time(&(pax->pax_header), "ctime", 1125 archive_entry_ctime(entry_main), 1126 archive_entry_ctime_nsec(entry_main)); 1127 1128 if (archive_entry_atime(entry_main) != 0 || 1129 archive_entry_atime_nsec(entry_main) != 0) 1130 add_pax_attr_time(&(pax->pax_header), "atime", 1131 archive_entry_atime(entry_main), 1132 archive_entry_atime_nsec(entry_main)); 1133 1134 /* Store birth/creationtime only if it's earlier than mtime */ 1135 if (archive_entry_birthtime_is_set(entry_main) && 1136 archive_entry_birthtime(entry_main) 1137 < archive_entry_mtime(entry_main)) 1138 add_pax_attr_time(&(pax->pax_header), 1139 "LIBARCHIVE.creationtime", 1140 archive_entry_birthtime(entry_main), 1141 archive_entry_birthtime_nsec(entry_main)); 1142 } 1143 1144 /* 1145 * The following items are handled differently in "pax 1146 * restricted" format. In particular, in "pax restricted" 1147 * format they won't be added unless need_extension is 1148 * already set (we're already generating an extended header, so 1149 * may as well include these). 1150 */ 1151 if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_RESTRICTED || 1152 need_extension) { 1153 if (archive_entry_mtime(entry_main) < 0 || 1154 archive_entry_mtime(entry_main) >= 0x7fffffff || 1155 archive_entry_mtime_nsec(entry_main) != 0) 1156 add_pax_attr_time(&(pax->pax_header), "mtime", 1157 archive_entry_mtime(entry_main), 1158 archive_entry_mtime_nsec(entry_main)); 1159 1160 /* I use a star-compatible file flag attribute. */ 1161 p = archive_entry_fflags_text(entry_main); 1162 if (p != NULL && *p != '\0') 1163 add_pax_attr(&(pax->pax_header), "SCHILY.fflags", p); 1164 1165 /* I use star-compatible ACL attributes. */ 1166 if ((acl_types & ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) { 1167 ret = add_pax_acl(a, entry_original, pax, 1168 ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID | 1169 ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA | 1170 ARCHIVE_ENTRY_ACL_STYLE_COMPACT); 1171 if (ret == ARCHIVE_FATAL) 1172 return (ARCHIVE_FATAL); 1173 } 1174 if (acl_types & ARCHIVE_ENTRY_ACL_TYPE_ACCESS) { 1175 ret = add_pax_acl(a, entry_original, pax, 1176 ARCHIVE_ENTRY_ACL_TYPE_ACCESS | 1177 ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID | 1178 ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA); 1179 if (ret == ARCHIVE_FATAL) 1180 return (ARCHIVE_FATAL); 1181 } 1182 if (acl_types & ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) { 1183 ret = add_pax_acl(a, entry_original, pax, 1184 ARCHIVE_ENTRY_ACL_TYPE_DEFAULT | 1185 ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID | 1186 ARCHIVE_ENTRY_ACL_STYLE_SEPARATOR_COMMA); 1187 if (ret == ARCHIVE_FATAL) 1188 return (ARCHIVE_FATAL); 1189 } 1190 1191 /* We use GNU-tar-compatible sparse attributes. */ 1192 if (sparse_count > 0) { 1193 int64_t soffset, slength; 1194 1195 add_pax_attr_int(&(pax->pax_header), 1196 "GNU.sparse.major", 1); 1197 add_pax_attr_int(&(pax->pax_header), 1198 "GNU.sparse.minor", 0); 1199 add_pax_attr(&(pax->pax_header), 1200 "GNU.sparse.name", entry_name.s); 1201 add_pax_attr_int(&(pax->pax_header), 1202 "GNU.sparse.realsize", 1203 archive_entry_size(entry_main)); 1204 1205 /* Rename the file name which will be used for 1206 * ustar header to a special name, which GNU 1207 * PAX Format 1.0 requires */ 1208 archive_entry_set_pathname(entry_main, 1209 build_gnu_sparse_name(gnu_sparse_name, 1210 entry_name.s)); 1211 1212 /* 1213 * - Make a sparse map, which will precede a file data. 1214 * - Get the total size of available data of sparse. 1215 */ 1216 archive_string_sprintf(&(pax->sparse_map), "%d\n", 1217 sparse_count); 1218 while (archive_entry_sparse_next(entry_main, 1219 &soffset, &slength) == ARCHIVE_OK) { 1220 archive_string_sprintf(&(pax->sparse_map), 1221 "%jd\n%jd\n", 1222 (intmax_t)soffset, 1223 (intmax_t)slength); 1224 sparse_total += slength; 1225 if (sparse_list_add(pax, soffset, slength) 1226 != ARCHIVE_OK) { 1227 archive_set_error(&a->archive, 1228 ENOMEM, 1229 "Can't allocate memory"); 1230 archive_entry_free(entry_main); 1231 archive_string_free(&entry_name); 1232 return (ARCHIVE_FATAL); 1233 } 1234 } 1235 } 1236 1237 /* Store extended attributes */ 1238 if (archive_write_pax_header_xattrs(a, pax, entry_original) 1239 == ARCHIVE_FATAL) { 1240 archive_entry_free(entry_main); 1241 archive_string_free(&entry_name); 1242 return (ARCHIVE_FATAL); 1243 } 1244 } 1245 1246 /* Only regular files have data. */ 1247 if (archive_entry_filetype(entry_main) != AE_IFREG) 1248 archive_entry_set_size(entry_main, 0); 1249 1250 /* 1251 * Pax-restricted does not store data for hardlinks, in order 1252 * to improve compatibility with ustar. 1253 */ 1254 if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE && 1255 hardlink != NULL) 1256 archive_entry_set_size(entry_main, 0); 1257 1258 /* 1259 * XXX Full pax interchange format does permit a hardlink 1260 * entry to have data associated with it. I'm not supporting 1261 * that here because the client expects me to tell them whether 1262 * or not this format expects data for hardlinks. If I 1263 * don't check here, then every pax archive will end up with 1264 * duplicated data for hardlinks. Someday, there may be 1265 * need to select this behavior, in which case the following 1266 * will need to be revisited. XXX 1267 */ 1268 if (hardlink != NULL) 1269 archive_entry_set_size(entry_main, 0); 1270 1271 /* Save a real file size. */ 1272 real_size = archive_entry_size(entry_main); 1273 /* 1274 * Overwrite a file size by the total size of sparse blocks and 1275 * the size of sparse map info. That file size is the length of 1276 * the data, which we will exactly store into an archive file. 1277 */ 1278 if (archive_strlen(&(pax->sparse_map))) { 1279 size_t mapsize = archive_strlen(&(pax->sparse_map)); 1280 pax->sparse_map_padding = 0x1ff & (-(ssize_t)mapsize); 1281 archive_entry_set_size(entry_main, 1282 mapsize + pax->sparse_map_padding + sparse_total); 1283 } 1284 1285 /* Format 'ustar' header for main entry. 1286 * 1287 * The trouble with file size: If the reader can't understand 1288 * the file size, they may not be able to locate the next 1289 * entry and the rest of the archive is toast. Pax-compliant 1290 * readers are supposed to ignore the file size in the main 1291 * header, so the question becomes how to maximize portability 1292 * for readers that don't support pax attribute extensions. 1293 * For maximum compatibility, I permit numeric extensions in 1294 * the main header so that the file size stored will always be 1295 * correct, even if it's in a format that only some 1296 * implementations understand. The technique used here is: 1297 * 1298 * a) If possible, follow the standard exactly. This handles 1299 * files up to 8 gigabytes minus 1. 1300 * 1301 * b) If that fails, try octal but omit the field terminator. 1302 * That handles files up to 64 gigabytes minus 1. 1303 * 1304 * c) Otherwise, use base-256 extensions. That handles files 1305 * up to 2^63 in this implementation, with the potential to 1306 * go up to 2^94. That should hold us for a while. ;-) 1307 * 1308 * The non-strict formatter uses similar logic for other 1309 * numeric fields, though they're less critical. 1310 */ 1311 if (__archive_write_format_header_ustar(a, ustarbuff, entry_main, -1, 0, 1312 NULL) == ARCHIVE_FATAL) 1313 return (ARCHIVE_FATAL); 1314 1315 /* If we built any extended attributes, write that entry first. */ 1316 if (archive_strlen(&(pax->pax_header)) > 0) { 1317 struct archive_entry *pax_attr_entry; 1318 time_t s; 1319 int64_t uid, gid; 1320 int mode; 1321 1322 pax_attr_entry = archive_entry_new2(&a->archive); 1323 p = entry_name.s; 1324 archive_entry_set_pathname(pax_attr_entry, 1325 build_pax_attribute_name(pax_entry_name, p)); 1326 archive_entry_set_size(pax_attr_entry, 1327 archive_strlen(&(pax->pax_header))); 1328 /* Copy uid/gid (but clip to ustar limits). */ 1329 uid = archive_entry_uid(entry_main); 1330 if (uid >= 1 << 18) 1331 uid = (1 << 18) - 1; 1332 archive_entry_set_uid(pax_attr_entry, uid); 1333 gid = archive_entry_gid(entry_main); 1334 if (gid >= 1 << 18) 1335 gid = (1 << 18) - 1; 1336 archive_entry_set_gid(pax_attr_entry, gid); 1337 /* Copy mode over (but not setuid/setgid bits) */ 1338 mode = archive_entry_mode(entry_main); 1339#ifdef S_ISUID 1340 mode &= ~S_ISUID; 1341#endif 1342#ifdef S_ISGID 1343 mode &= ~S_ISGID; 1344#endif 1345#ifdef S_ISVTX 1346 mode &= ~S_ISVTX; 1347#endif 1348 archive_entry_set_mode(pax_attr_entry, mode); 1349 1350 /* Copy uname/gname. */ 1351 archive_entry_set_uname(pax_attr_entry, 1352 archive_entry_uname(entry_main)); 1353 archive_entry_set_gname(pax_attr_entry, 1354 archive_entry_gname(entry_main)); 1355 1356 /* Copy mtime, but clip to ustar limits. */ 1357 s = archive_entry_mtime(entry_main); 1358 if (s < 0) { s = 0; } 1359 if (s >= 0x7fffffff) { s = 0x7fffffff; } 1360 archive_entry_set_mtime(pax_attr_entry, s, 0); 1361 1362 /* Standard ustar doesn't support atime. */ 1363 archive_entry_set_atime(pax_attr_entry, 0, 0); 1364 1365 /* Standard ustar doesn't support ctime. */ 1366 archive_entry_set_ctime(pax_attr_entry, 0, 0); 1367 1368 r = __archive_write_format_header_ustar(a, paxbuff, 1369 pax_attr_entry, 'x', 1, NULL); 1370 1371 archive_entry_free(pax_attr_entry); 1372 1373 /* Note that the 'x' header shouldn't ever fail to format */ 1374 if (r < ARCHIVE_WARN) { 1375 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 1376 "archive_write_pax_header: " 1377 "'x' header failed?! This can't happen.\n"); 1378 return (ARCHIVE_FATAL); 1379 } else if (r < ret) 1380 ret = r; 1381 r = __archive_write_output(a, paxbuff, 512); 1382 if (r != ARCHIVE_OK) { 1383 sparse_list_clear(pax); 1384 pax->entry_bytes_remaining = 0; 1385 pax->entry_padding = 0; 1386 return (ARCHIVE_FATAL); 1387 } 1388 1389 pax->entry_bytes_remaining = archive_strlen(&(pax->pax_header)); 1390 pax->entry_padding = 1391 0x1ff & (-(int64_t)pax->entry_bytes_remaining); 1392 1393 r = __archive_write_output(a, pax->pax_header.s, 1394 archive_strlen(&(pax->pax_header))); 1395 if (r != ARCHIVE_OK) { 1396 /* If a write fails, we're pretty much toast. */ 1397 return (ARCHIVE_FATAL); 1398 } 1399 /* Pad out the end of the entry. */ 1400 r = __archive_write_nulls(a, (size_t)pax->entry_padding); 1401 if (r != ARCHIVE_OK) { 1402 /* If a write fails, we're pretty much toast. */ 1403 return (ARCHIVE_FATAL); 1404 } 1405 pax->entry_bytes_remaining = pax->entry_padding = 0; 1406 } 1407 1408 /* Write the header for main entry. */ 1409 r = __archive_write_output(a, ustarbuff, 512); 1410 if (r != ARCHIVE_OK) 1411 return (r); 1412 1413 /* 1414 * Inform the client of the on-disk size we're using, so 1415 * they can avoid unnecessarily writing a body for something 1416 * that we're just going to ignore. 1417 */ 1418 archive_entry_set_size(entry_original, real_size); 1419 if (pax->sparse_list == NULL && real_size > 0) { 1420 /* This is not a sparse file but we handle its data as 1421 * a sparse block. */ 1422 sparse_list_add(pax, 0, real_size); 1423 sparse_total = real_size; 1424 } 1425 pax->entry_padding = 0x1ff & (-(int64_t)sparse_total); 1426 archive_entry_free(entry_main); 1427 archive_string_free(&entry_name); 1428 1429 return (ret); 1430} 1431 1432/* 1433 * We need a valid name for the regular 'ustar' entry. This routine 1434 * tries to hack something more-or-less reasonable. 1435 * 1436 * The approach here tries to preserve leading dir names. We do so by 1437 * working with four sections: 1438 * 1) "prefix" directory names, 1439 * 2) "suffix" directory names, 1440 * 3) inserted dir name (optional), 1441 * 4) filename. 1442 * 1443 * These sections must satisfy the following requirements: 1444 * * Parts 1 & 2 together form an initial portion of the dir name. 1445 * * Part 3 is specified by the caller. (It should not contain a leading 1446 * or trailing '/'.) 1447 * * Part 4 forms an initial portion of the base filename. 1448 * * The filename must be <= 99 chars to fit the ustar 'name' field. 1449 * * Parts 2, 3, 4 together must be <= 99 chars to fit the ustar 'name' fld. 1450 * * Part 1 must be <= 155 chars to fit the ustar 'prefix' field. 1451 * * If the original name ends in a '/', the new name must also end in a '/' 1452 * * Trailing '/.' sequences may be stripped. 1453 * 1454 * Note: Recall that the ustar format does not store the '/' separating 1455 * parts 1 & 2, but does store the '/' separating parts 2 & 3. 1456 */ 1457static char * 1458build_ustar_entry_name(char *dest, const char *src, size_t src_length, 1459 const char *insert) 1460{ 1461 const char *prefix, *prefix_end; 1462 const char *suffix, *suffix_end; 1463 const char *filename, *filename_end; 1464 char *p; 1465 int need_slash = 0; /* Was there a trailing slash? */ 1466 size_t suffix_length = 99; 1467 size_t insert_length; 1468 1469 /* Length of additional dir element to be added. */ 1470 if (insert == NULL) 1471 insert_length = 0; 1472 else 1473 /* +2 here allows for '/' before and after the insert. */ 1474 insert_length = strlen(insert) + 2; 1475 1476 /* Step 0: Quick bailout in a common case. */ 1477 if (src_length < 100 && insert == NULL) { 1478 strncpy(dest, src, src_length); 1479 dest[src_length] = '\0'; 1480 return (dest); 1481 } 1482 1483 /* Step 1: Locate filename and enforce the length restriction. */ 1484 filename_end = src + src_length; 1485 /* Remove trailing '/' chars and '/.' pairs. */ 1486 for (;;) { 1487 if (filename_end > src && filename_end[-1] == '/') { 1488 filename_end --; 1489 need_slash = 1; /* Remember to restore trailing '/'. */ 1490 continue; 1491 } 1492 if (filename_end > src + 1 && filename_end[-1] == '.' 1493 && filename_end[-2] == '/') { 1494 filename_end -= 2; 1495 need_slash = 1; /* "foo/." will become "foo/" */ 1496 continue; 1497 } 1498 break; 1499 } 1500 if (need_slash) 1501 suffix_length--; 1502 /* Find start of filename. */ 1503 filename = filename_end - 1; 1504 while ((filename > src) && (*filename != '/')) 1505 filename --; 1506 if ((*filename == '/') && (filename < filename_end - 1)) 1507 filename ++; 1508 /* Adjust filename_end so that filename + insert fits in 99 chars. */ 1509 suffix_length -= insert_length; 1510 if (filename_end > filename + suffix_length) 1511 filename_end = filename + suffix_length; 1512 /* Calculate max size for "suffix" section (#3 above). */ 1513 suffix_length -= filename_end - filename; 1514 1515 /* Step 2: Locate the "prefix" section of the dirname, including 1516 * trailing '/'. */ 1517 prefix = src; 1518 prefix_end = prefix + 155; 1519 if (prefix_end > filename) 1520 prefix_end = filename; 1521 while (prefix_end > prefix && *prefix_end != '/') 1522 prefix_end--; 1523 if ((prefix_end < filename) && (*prefix_end == '/')) 1524 prefix_end++; 1525 1526 /* Step 3: Locate the "suffix" section of the dirname, 1527 * including trailing '/'. */ 1528 suffix = prefix_end; 1529 suffix_end = suffix + suffix_length; /* Enforce limit. */ 1530 if (suffix_end > filename) 1531 suffix_end = filename; 1532 if (suffix_end < suffix) 1533 suffix_end = suffix; 1534 while (suffix_end > suffix && *suffix_end != '/') 1535 suffix_end--; 1536 if ((suffix_end < filename) && (*suffix_end == '/')) 1537 suffix_end++; 1538 1539 /* Step 4: Build the new name. */ 1540 /* The OpenBSD strlcpy function is safer, but less portable. */ 1541 /* Rather than maintain two versions, just use the strncpy version. */ 1542 p = dest; 1543 if (prefix_end > prefix) { 1544 strncpy(p, prefix, prefix_end - prefix); 1545 p += prefix_end - prefix; 1546 } 1547 if (suffix_end > suffix) { 1548 strncpy(p, suffix, suffix_end - suffix); 1549 p += suffix_end - suffix; 1550 } 1551 if (insert != NULL) { 1552 /* Note: assume insert does not have leading or trailing '/' */ 1553 strcpy(p, insert); 1554 p += strlen(insert); 1555 *p++ = '/'; 1556 } 1557 strncpy(p, filename, filename_end - filename); 1558 p += filename_end - filename; 1559 if (need_slash) 1560 *p++ = '/'; 1561 *p = '\0'; 1562 1563 return (dest); 1564} 1565 1566/* 1567 * The ustar header for the pax extended attributes must have a 1568 * reasonable name: SUSv3 requires 'dirname'/PaxHeader.'pid'/'filename' 1569 * where 'pid' is the PID of the archiving process. Unfortunately, 1570 * that makes testing a pain since the output varies for each run, 1571 * so I'm sticking with the simpler 'dirname'/PaxHeader/'filename' 1572 * for now. (Someday, I'll make this settable. Then I can use the 1573 * SUS recommendation as default and test harnesses can override it 1574 * to get predictable results.) 1575 * 1576 * Joerg Schilling has argued that this is unnecessary because, in 1577 * practice, if the pax extended attributes get extracted as regular 1578 * files, no one is going to bother reading those attributes to 1579 * manually restore them. Based on this, 'star' uses 1580 * /tmp/PaxHeader/'basename' as the ustar header name. This is a 1581 * tempting argument, in part because it's simpler than the SUSv3 1582 * recommendation, but I'm not entirely convinced. I'm also 1583 * uncomfortable with the fact that "/tmp" is a Unix-ism. 1584 * 1585 * The following routine leverages build_ustar_entry_name() above and 1586 * so is simpler than you might think. It just needs to provide the 1587 * additional path element and handle a few pathological cases). 1588 */ 1589static char * 1590build_pax_attribute_name(char *dest, const char *src) 1591{ 1592 char buff[64]; 1593 const char *p; 1594 1595 /* Handle the null filename case. */ 1596 if (src == NULL || *src == '\0') { 1597 strcpy(dest, "PaxHeader/blank"); 1598 return (dest); 1599 } 1600 1601 /* Prune final '/' and other unwanted final elements. */ 1602 p = src + strlen(src); 1603 for (;;) { 1604 /* Ends in "/", remove the '/' */ 1605 if (p > src && p[-1] == '/') { 1606 --p; 1607 continue; 1608 } 1609 /* Ends in "/.", remove the '.' */ 1610 if (p > src + 1 && p[-1] == '.' 1611 && p[-2] == '/') { 1612 --p; 1613 continue; 1614 } 1615 break; 1616 } 1617 1618 /* Pathological case: After above, there was nothing left. 1619 * This includes "/." "/./." "/.//./." etc. */ 1620 if (p == src) { 1621 strcpy(dest, "/PaxHeader/rootdir"); 1622 return (dest); 1623 } 1624 1625 /* Convert unadorned "." into a suitable filename. */ 1626 if (*src == '.' && p == src + 1) { 1627 strcpy(dest, "PaxHeader/currentdir"); 1628 return (dest); 1629 } 1630 1631 /* 1632 * TODO: Push this string into the 'pax' structure to avoid 1633 * recomputing it every time. That will also open the door 1634 * to having clients override it. 1635 */ 1636#if HAVE_GETPID && 0 /* Disable this for now; see above comment. */ 1637 sprintf(buff, "PaxHeader.%d", getpid()); 1638#else 1639 /* If the platform can't fetch the pid, don't include it. */ 1640 strcpy(buff, "PaxHeader"); 1641#endif 1642 /* General case: build a ustar-compatible name adding 1643 * "/PaxHeader/". */ 1644 build_ustar_entry_name(dest, src, p - src, buff); 1645 1646 return (dest); 1647} 1648 1649/* 1650 * GNU PAX Format 1.0 requires the special name, which pattern is: 1651 * <dir>/GNUSparseFile.<pid>/<original file name> 1652 * 1653 * This function is used for only Sparse file, a file type of which 1654 * is regular file. 1655 */ 1656static char * 1657build_gnu_sparse_name(char *dest, const char *src) 1658{ 1659 char buff[64]; 1660 const char *p; 1661 1662 /* Handle the null filename case. */ 1663 if (src == NULL || *src == '\0') { 1664 strcpy(dest, "GNUSparseFile/blank"); 1665 return (dest); 1666 } 1667 1668 /* Prune final '/' and other unwanted final elements. */ 1669 p = src + strlen(src); 1670 for (;;) { 1671 /* Ends in "/", remove the '/' */ 1672 if (p > src && p[-1] == '/') { 1673 --p; 1674 continue; 1675 } 1676 /* Ends in "/.", remove the '.' */ 1677 if (p > src + 1 && p[-1] == '.' 1678 && p[-2] == '/') { 1679 --p; 1680 continue; 1681 } 1682 break; 1683 } 1684 1685#if HAVE_GETPID && 0 /* Disable this as pax attribute name. */ 1686 sprintf(buff, "GNUSparseFile.%d", getpid()); 1687#else 1688 /* If the platform can't fetch the pid, don't include it. */ 1689 strcpy(buff, "GNUSparseFile"); 1690#endif 1691 /* General case: build a ustar-compatible name adding 1692 * "/GNUSparseFile/". */ 1693 build_ustar_entry_name(dest, src, p - src, buff); 1694 1695 return (dest); 1696} 1697 1698/* Write two null blocks for the end of archive */ 1699static int 1700archive_write_pax_close(struct archive_write *a) 1701{ 1702 return (__archive_write_nulls(a, 512 * 2)); 1703} 1704 1705static int 1706archive_write_pax_free(struct archive_write *a) 1707{ 1708 struct pax *pax; 1709 1710 pax = (struct pax *)a->format_data; 1711 if (pax == NULL) 1712 return (ARCHIVE_OK); 1713 1714 archive_string_free(&pax->pax_header); 1715 archive_string_free(&pax->sparse_map); 1716 archive_string_free(&pax->l_url_encoded_name); 1717 sparse_list_clear(pax); 1718 free(pax); 1719 a->format_data = NULL; 1720 return (ARCHIVE_OK); 1721} 1722 1723static int 1724archive_write_pax_finish_entry(struct archive_write *a) 1725{ 1726 struct pax *pax; 1727 uint64_t remaining; 1728 int ret; 1729 1730 pax = (struct pax *)a->format_data; 1731 remaining = pax->entry_bytes_remaining; 1732 if (remaining == 0) { 1733 while (pax->sparse_list) { 1734 struct sparse_block *sb; 1735 if (!pax->sparse_list->is_hole) 1736 remaining += pax->sparse_list->remaining; 1737 sb = pax->sparse_list->next; 1738 free(pax->sparse_list); 1739 pax->sparse_list = sb; 1740 } 1741 } 1742 ret = __archive_write_nulls(a, (size_t)(remaining + pax->entry_padding)); 1743 pax->entry_bytes_remaining = pax->entry_padding = 0; 1744 return (ret); 1745} 1746 1747static ssize_t 1748archive_write_pax_data(struct archive_write *a, const void *buff, size_t s) 1749{ 1750 struct pax *pax; 1751 size_t ws; 1752 size_t total; 1753 int ret; 1754 1755 pax = (struct pax *)a->format_data; 1756 1757 /* 1758 * According to GNU PAX format 1.0, write a sparse map 1759 * before the body. 1760 */ 1761 if (archive_strlen(&(pax->sparse_map))) { 1762 ret = __archive_write_output(a, pax->sparse_map.s, 1763 archive_strlen(&(pax->sparse_map))); 1764 if (ret != ARCHIVE_OK) 1765 return (ret); 1766 ret = __archive_write_nulls(a, pax->sparse_map_padding); 1767 if (ret != ARCHIVE_OK) 1768 return (ret); 1769 archive_string_empty(&(pax->sparse_map)); 1770 } 1771 1772 total = 0; 1773 while (total < s) { 1774 const unsigned char *p; 1775 1776 while (pax->sparse_list != NULL && 1777 pax->sparse_list->remaining == 0) { 1778 struct sparse_block *sb = pax->sparse_list->next; 1779 free(pax->sparse_list); 1780 pax->sparse_list = sb; 1781 } 1782 1783 if (pax->sparse_list == NULL) 1784 return (total); 1785 1786 p = ((const unsigned char *)buff) + total; 1787 ws = s - total; 1788 if (ws > pax->sparse_list->remaining) 1789 ws = (size_t)pax->sparse_list->remaining; 1790 1791 if (pax->sparse_list->is_hole) { 1792 /* Current block is hole thus we do not write 1793 * the body. */ 1794 pax->sparse_list->remaining -= ws; 1795 total += ws; 1796 continue; 1797 } 1798 1799 ret = __archive_write_output(a, p, ws); 1800 pax->sparse_list->remaining -= ws; 1801 total += ws; 1802 if (ret != ARCHIVE_OK) 1803 return (ret); 1804 } 1805 return (total); 1806} 1807 1808static int 1809has_non_ASCII(const char *_p) 1810{ 1811 const unsigned char *p = (const unsigned char *)_p; 1812 1813 if (p == NULL) 1814 return (1); 1815 while (*p != '\0' && *p < 128) 1816 p++; 1817 return (*p != '\0'); 1818} 1819 1820/* 1821 * Used by extended attribute support; encodes the name 1822 * so that there will be no '=' characters in the result. 1823 */ 1824static char * 1825url_encode(const char *in) 1826{ 1827 const char *s; 1828 char *d; 1829 int out_len = 0; 1830 char *out; 1831 1832 for (s = in; *s != '\0'; s++) { 1833 if (*s < 33 || *s > 126 || *s == '%' || *s == '=') 1834 out_len += 3; 1835 else 1836 out_len++; 1837 } 1838 1839 out = (char *)malloc(out_len + 1); 1840 if (out == NULL) 1841 return (NULL); 1842 1843 for (s = in, d = out; *s != '\0'; s++) { 1844 /* encode any non-printable ASCII character or '%' or '=' */ 1845 if (*s < 33 || *s > 126 || *s == '%' || *s == '=') { 1846 /* URL encoding is '%' followed by two hex digits */ 1847 *d++ = '%'; 1848 *d++ = "0123456789ABCDEF"[0x0f & (*s >> 4)]; 1849 *d++ = "0123456789ABCDEF"[0x0f & *s]; 1850 } else { 1851 *d++ = *s; 1852 } 1853 } 1854 *d = '\0'; 1855 return (out); 1856} 1857 1858/* 1859 * Encode a sequence of bytes into a C string using base-64 encoding. 1860 * 1861 * Returns a null-terminated C string allocated with malloc(); caller 1862 * is responsible for freeing the result. 1863 */ 1864static char * 1865base64_encode(const char *s, size_t len) 1866{ 1867 static const char digits[64] = 1868 { 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O', 1869 'P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d', 1870 'e','f','g','h','i','j','k','l','m','n','o','p','q','r','s', 1871 't','u','v','w','x','y','z','0','1','2','3','4','5','6','7', 1872 '8','9','+','/' }; 1873 int v; 1874 char *d, *out; 1875 1876 /* 3 bytes becomes 4 chars, but round up and allow for trailing NUL */ 1877 out = (char *)malloc((len * 4 + 2) / 3 + 1); 1878 if (out == NULL) 1879 return (NULL); 1880 d = out; 1881 1882 /* Convert each group of 3 bytes into 4 characters. */ 1883 while (len >= 3) { 1884 v = (((int)s[0] << 16) & 0xff0000) 1885 | (((int)s[1] << 8) & 0xff00) 1886 | (((int)s[2]) & 0x00ff); 1887 s += 3; 1888 len -= 3; 1889 *d++ = digits[(v >> 18) & 0x3f]; 1890 *d++ = digits[(v >> 12) & 0x3f]; 1891 *d++ = digits[(v >> 6) & 0x3f]; 1892 *d++ = digits[(v) & 0x3f]; 1893 } 1894 /* Handle final group of 1 byte (2 chars) or 2 bytes (3 chars). */ 1895 switch (len) { 1896 case 0: break; 1897 case 1: 1898 v = (((int)s[0] << 16) & 0xff0000); 1899 *d++ = digits[(v >> 18) & 0x3f]; 1900 *d++ = digits[(v >> 12) & 0x3f]; 1901 break; 1902 case 2: 1903 v = (((int)s[0] << 16) & 0xff0000) 1904 | (((int)s[1] << 8) & 0xff00); 1905 *d++ = digits[(v >> 18) & 0x3f]; 1906 *d++ = digits[(v >> 12) & 0x3f]; 1907 *d++ = digits[(v >> 6) & 0x3f]; 1908 break; 1909 } 1910 /* Add trailing NUL character so output is a valid C string. */ 1911 *d = '\0'; 1912 return (out); 1913} 1914 1915static void 1916sparse_list_clear(struct pax *pax) 1917{ 1918 while (pax->sparse_list != NULL) { 1919 struct sparse_block *sb = pax->sparse_list; 1920 pax->sparse_list = sb->next; 1921 free(sb); 1922 } 1923 pax->sparse_tail = NULL; 1924} 1925 1926static int 1927_sparse_list_add_block(struct pax *pax, int64_t offset, int64_t length, 1928 int is_hole) 1929{ 1930 struct sparse_block *sb; 1931 1932 sb = (struct sparse_block *)malloc(sizeof(*sb)); 1933 if (sb == NULL) 1934 return (ARCHIVE_FATAL); 1935 sb->next = NULL; 1936 sb->is_hole = is_hole; 1937 sb->offset = offset; 1938 sb->remaining = length; 1939 if (pax->sparse_list == NULL || pax->sparse_tail == NULL) 1940 pax->sparse_list = pax->sparse_tail = sb; 1941 else { 1942 pax->sparse_tail->next = sb; 1943 pax->sparse_tail = sb; 1944 } 1945 return (ARCHIVE_OK); 1946} 1947 1948static int 1949sparse_list_add(struct pax *pax, int64_t offset, int64_t length) 1950{ 1951 int64_t last_offset; 1952 int r; 1953 1954 if (pax->sparse_tail == NULL) 1955 last_offset = 0; 1956 else { 1957 last_offset = pax->sparse_tail->offset + 1958 pax->sparse_tail->remaining; 1959 } 1960 if (last_offset < offset) { 1961 /* Add a hole block. */ 1962 r = _sparse_list_add_block(pax, last_offset, 1963 offset - last_offset, 1); 1964 if (r != ARCHIVE_OK) 1965 return (r); 1966 } 1967 /* Add data block. */ 1968 return (_sparse_list_add_block(pax, offset, length, 0)); 1969} 1970 1971