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