001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.commons.compress.archivers.dump; 020 021import java.util.Collections; 022import java.util.Date; 023import java.util.EnumSet; 024import java.util.HashSet; 025import java.util.Set; 026import org.apache.commons.compress.archivers.ArchiveEntry; 027 028/** 029 * This class represents an entry in a Dump archive. It consists 030 * of the entry's header, the entry's File and any extended attributes. 031 * <p> 032 * DumpEntries that are created from the header bytes read from 033 * an archive are instantiated with the DumpArchiveEntry( byte[] ) 034 * constructor. These entries will be used when extracting from 035 * or listing the contents of an archive. These entries have their 036 * header filled in using the header bytes. They also set the File 037 * to null, since they reference an archive entry not a file. 038 * <p> 039 * DumpEntries can also be constructed from nothing but a name. 040 * This allows the programmer to construct the entry by hand, for 041 * instance when only an InputStream is available for writing to 042 * the archive, and the header information is constructed from 043 * other information. In this case the header fields are set to 044 * defaults and the File is set to null. 045 * 046 * <p> 047 * The C structure for a Dump Entry's header is: 048 * <pre> 049 * #define TP_BSIZE 1024 // size of each file block 050 * #define NTREC 10 // number of blocks to write at once 051 * #define HIGHDENSITYTREC 32 // number of blocks to write on high-density tapes 052 * #define TP_NINDIR (TP_BSIZE/2) // number if indirect inodes in record 053 * #define TP_NINOS (TP_NINDIR / sizeof (int32_t)) 054 * #define LBLSIZE 16 055 * #define NAMELEN 64 056 * 057 * #define OFS_MAGIC (int)60011 // old format magic value 058 * #define NFS_MAGIC (int)60012 // new format magic value 059 * #define FS_UFS2_MAGIC (int)0x19540119 060 * #define CHECKSUM (int)84446 // constant used in checksum algorithm 061 * 062 * struct s_spcl { 063 * int32_t c_type; // record type (see below) 064 * int32_t <b>c_date</b>; // date of this dump 065 * int32_t <b>c_ddate</b>; // date of previous dump 066 * int32_t c_volume; // dump volume number 067 * u_int32_t c_tapea; // logical block of this record 068 * dump_ino_t c_ino; // number of inode 069 * int32_t <b>c_magic</b>; // magic number (see above) 070 * int32_t c_checksum; // record checksum 071 * #ifdef __linux__ 072 * struct new_bsd_inode c_dinode; 073 * #else 074 * #ifdef sunos 075 * struct new_bsd_inode c_dinode; 076 * #else 077 * struct dinode c_dinode; // ownership and mode of inode 078 * #endif 079 * #endif 080 * int32_t c_count; // number of valid c_addr entries 081 * union u_data c_data; // see above 082 * char <b>c_label[LBLSIZE]</b>; // dump label 083 * int32_t <b>c_level</b>; // level of this dump 084 * char <b>c_filesys[NAMELEN]</b>; // name of dumpped file system 085 * char <b>c_dev[NAMELEN]</b>; // name of dumpped device 086 * char <b>c_host[NAMELEN]</b>; // name of dumpped host 087 * int32_t c_flags; // additional information (see below) 088 * int32_t c_firstrec; // first record on volume 089 * int32_t c_ntrec; // blocksize on volume 090 * int32_t c_extattributes; // additional inode info (see below) 091 * int32_t c_spare[30]; // reserved for future uses 092 * } s_spcl; 093 * 094 * // 095 * // flag values 096 * // 097 * #define DR_NEWHEADER 0x0001 // new format tape header 098 * #define DR_NEWINODEFMT 0x0002 // new format inodes on tape 099 * #define DR_COMPRESSED 0x0080 // dump tape is compressed 100 * #define DR_METAONLY 0x0100 // only the metadata of the inode has been dumped 101 * #define DR_INODEINFO 0x0002 // [SIC] TS_END header contains c_inos information 102 * #define DR_EXTATTRIBUTES 0x8000 103 * 104 * // 105 * // extattributes inode info 106 * // 107 * #define EXT_REGULAR 0 108 * #define EXT_MACOSFNDRINFO 1 109 * #define EXT_MACOSRESFORK 2 110 * #define EXT_XATTR 3 111 * 112 * // used for EA on tape 113 * #define EXT2_GOOD_OLD_INODE_SIZE 128 114 * #define EXT2_XATTR_MAGIC 0xEA020000 // block EA 115 * #define EXT2_XATTR_MAGIC2 0xEA020001 // in inode EA 116 * </pre> 117 * <p> 118 * The fields in <b>bold</b> are the same for all blocks. (This permitted 119 * multiple dumps to be written to a single tape.) 120 * </p> 121 * 122 * <p> 123 * The C structure for the inode (file) information is: 124 * <pre> 125 * struct bsdtimeval { // **** alpha-*-linux is deviant 126 * __u32 tv_sec; 127 * __u32 tv_usec; 128 * }; 129 * 130 * #define NDADDR 12 131 * #define NIADDR 3 132 * 133 * // 134 * // This is the new (4.4) BSD inode structure 135 * // copied from the FreeBSD 2.0 <ufs/ufs/dinode.h> include file 136 * // 137 * struct new_bsd_inode { 138 * __u16 di_mode; // file type, standard Unix permissions 139 * __s16 di_nlink; // number of hard links to file. 140 * union { 141 * __u16 oldids[2]; 142 * __u32 inumber; 143 * } di_u; 144 * u_quad_t di_size; // file size 145 * struct bsdtimeval di_atime; // time file was last accessed 146 * struct bsdtimeval di_mtime; // time file was last modified 147 * struct bsdtimeval di_ctime; // time file was created 148 * __u32 di_db[NDADDR]; 149 * __u32 di_ib[NIADDR]; 150 * __u32 di_flags; // 151 * __s32 di_blocks; // number of disk blocks 152 * __s32 di_gen; // generation number 153 * __u32 di_uid; // user id (see /etc/passwd) 154 * __u32 di_gid; // group id (see /etc/group) 155 * __s32 di_spare[2]; // unused 156 * }; 157 * </pre> 158 * <p> 159 * It is important to note that the header DOES NOT have the name of the 160 * file. It can't since hard links mean that you may have multiple filenames 161 * for a single physical file. You must read the contents of the directory 162 * entries to learn the mapping(s) from filename to inode. 163 * </p> 164 * 165 * <p> 166 * The C structure that indicates if a specific block is a real block 167 * that contains data or is a sparse block that is not persisted to the 168 * disk is:</p> 169 * <pre> 170 * #define TP_BSIZE 1024 171 * #define TP_NINDIR (TP_BSIZE/2) 172 * 173 * union u_data { 174 * char s_addrs[TP_NINDIR]; // 1 => data; 0 => hole in inode 175 * int32_t s_inos[TP_NINOS]; // table of first inode on each volume 176 * } u_data; 177 * </pre> 178 * 179 * @NotThreadSafe 180 */ 181public class DumpArchiveEntry implements ArchiveEntry { 182 private String name; 183 private TYPE type = TYPE.UNKNOWN; 184 private int mode; 185 private Set<PERMISSION> permissions = Collections.emptySet(); 186 private long size; 187 private long atime; 188 private long mtime; 189 private int uid; 190 private int gid; 191 192 /** 193 * Currently unused 194 */ 195 private final DumpArchiveSummary summary = null; 196 197 // this information is available from standard index. 198 private final TapeSegmentHeader header = new TapeSegmentHeader(); 199 private String simpleName; 200 private String originalName; 201 202 // this information is available from QFA index 203 private int volume; 204 private long offset; 205 private int ino; 206 private int nlink; 207 private long ctime; 208 private int generation; 209 private boolean isDeleted; 210 211 /** 212 * Default constructor. 213 */ 214 public DumpArchiveEntry() { 215 } 216 217 /** 218 * Constructor taking only filename. 219 * @param name pathname 220 * @param simpleName actual filename. 221 */ 222 public DumpArchiveEntry(final String name, final String simpleName) { 223 setName(name); 224 this.simpleName = simpleName; 225 } 226 227 /** 228 * Constructor taking name, inode and type. 229 * 230 * @param name the name 231 * @param simpleName the simple name 232 * @param ino the ino 233 * @param type the type 234 */ 235 protected DumpArchiveEntry(final String name, final String simpleName, final int ino, 236 final TYPE type) { 237 setType(type); 238 setName(name); 239 this.simpleName = simpleName; 240 this.ino = ino; 241 this.offset = 0; 242 } 243 244 /** 245 * Returns the path of the entry. 246 * @return the path of the entry. 247 */ 248 public String getSimpleName() { 249 return simpleName; 250 } 251 252 /** 253 * Sets the path of the entry. 254 * @param simpleName the simple name 255 */ 256 protected void setSimpleName(final String simpleName) { 257 this.simpleName = simpleName; 258 } 259 260 /** 261 * Returns the ino of the entry. 262 * @return the ino 263 */ 264 public int getIno() { 265 return header.getIno(); 266 } 267 268 /** 269 * Return the number of hard links to the entry. 270 * @return the number of hard links 271 */ 272 public int getNlink() { 273 return nlink; 274 } 275 276 /** 277 * Set the number of hard links. 278 * @param nlink the number of hard links 279 */ 280 public void setNlink(final int nlink) { 281 this.nlink = nlink; 282 } 283 284 /** 285 * Get file creation time. 286 * @return the creation time 287 */ 288 public Date getCreationTime() { 289 return new Date(ctime); 290 } 291 292 /** 293 * Set the file creation time. 294 * @param ctime the creation time 295 */ 296 public void setCreationTime(final Date ctime) { 297 this.ctime = ctime.getTime(); 298 } 299 300 /** 301 * Return the generation of the file. 302 * @return the generation 303 */ 304 public int getGeneration() { 305 return generation; 306 } 307 308 /** 309 * Set the generation of the file. 310 * @param generation the generation 311 */ 312 public void setGeneration(final int generation) { 313 this.generation = generation; 314 } 315 316 /** 317 * Has this file been deleted? (On valid on incremental dumps.) 318 * @return whether the file has been deleted 319 */ 320 public boolean isDeleted() { 321 return isDeleted; 322 } 323 324 /** 325 * Set whether this file has been deleted. 326 * @param isDeleted whether the file has been deleted 327 */ 328 public void setDeleted(final boolean isDeleted) { 329 this.isDeleted = isDeleted; 330 } 331 332 /** 333 * Return the offset within the archive 334 * @return the offset 335 */ 336 public long getOffset() { 337 return offset; 338 } 339 340 /** 341 * Set the offset within the archive. 342 * @param offset the offset 343 */ 344 public void setOffset(final long offset) { 345 this.offset = offset; 346 } 347 348 /** 349 * Return the tape volume where this file is located. 350 * @return the volume 351 */ 352 public int getVolume() { 353 return volume; 354 } 355 356 /** 357 * Set the tape volume. 358 * @param volume the volume 359 */ 360 public void setVolume(final int volume) { 361 this.volume = volume; 362 } 363 364 /** 365 * Return the type of the tape segment header. 366 * @return the segment header 367 */ 368 public DumpArchiveConstants.SEGMENT_TYPE getHeaderType() { 369 return header.getType(); 370 } 371 372 /** 373 * Return the number of records in this segment. 374 * @return the number of records 375 */ 376 public int getHeaderCount() { 377 return header.getCount(); 378 } 379 380 /** 381 * Return the number of sparse records in this segment. 382 * @return the number of sparse records 383 */ 384 public int getHeaderHoles() { 385 return header.getHoles(); 386 } 387 388 /** 389 * Is this a sparse record? 390 * @param idx index of the record to check 391 * @return whether this is a sparse record 392 */ 393 public boolean isSparseRecord(final int idx) { 394 return (header.getCdata(idx) & 0x01) == 0; 395 } 396 397 @Override 398 public int hashCode() { 399 return ino; 400 } 401 402 @Override 403 public boolean equals(final Object o) { 404 if (o == this) { 405 return true; 406 } else if (o == null || !o.getClass().equals(getClass())) { 407 return false; 408 } 409 410 final DumpArchiveEntry rhs = (DumpArchiveEntry) o; 411 412 if ((header == null) || (rhs.header == null)) { 413 return false; 414 } 415 416 if (ino != rhs.ino) { 417 return false; 418 } 419 420 if ((summary == null && rhs.summary != null) 421 || (summary != null && !summary.equals(rhs.summary))) { 422 return false; 423 } 424 425 return true; 426 } 427 428 @Override 429 public String toString() { 430 return getName(); 431 } 432 433 /** 434 * Populate the dump archive entry and tape segment header with 435 * the contents of the buffer. 436 * 437 * @param buffer buffer to read content from 438 */ 439 static DumpArchiveEntry parse(final byte[] buffer) { 440 final DumpArchiveEntry entry = new DumpArchiveEntry(); 441 final TapeSegmentHeader header = entry.header; 442 443 header.type = DumpArchiveConstants.SEGMENT_TYPE.find(DumpArchiveUtil.convert32( 444 buffer, 0)); 445 446 //header.dumpDate = new Date(1000L * DumpArchiveUtil.convert32(buffer, 4)); 447 //header.previousDumpDate = new Date(1000L * DumpArchiveUtil.convert32( 448 // buffer, 8)); 449 header.volume = DumpArchiveUtil.convert32(buffer, 12); 450 //header.tapea = DumpArchiveUtil.convert32(buffer, 16); 451 entry.ino = header.ino = DumpArchiveUtil.convert32(buffer, 20); 452 453 //header.magic = DumpArchiveUtil.convert32(buffer, 24); 454 //header.checksum = DumpArchiveUtil.convert32(buffer, 28); 455 final int m = DumpArchiveUtil.convert16(buffer, 32); 456 457 // determine the type of the file. 458 entry.setType(TYPE.find((m >> 12) & 0x0F)); 459 460 // determine the standard permissions 461 entry.setMode(m); 462 463 entry.nlink = DumpArchiveUtil.convert16(buffer, 34); 464 // inumber, oldids? 465 entry.setSize(DumpArchiveUtil.convert64(buffer, 40)); 466 467 long t = (1000L * DumpArchiveUtil.convert32(buffer, 48)) + 468 (DumpArchiveUtil.convert32(buffer, 52) / 1000); 469 entry.setAccessTime(new Date(t)); 470 t = (1000L * DumpArchiveUtil.convert32(buffer, 56)) + 471 (DumpArchiveUtil.convert32(buffer, 60) / 1000); 472 entry.setLastModifiedDate(new Date(t)); 473 t = (1000L * DumpArchiveUtil.convert32(buffer, 64)) + 474 (DumpArchiveUtil.convert32(buffer, 68) / 1000); 475 entry.ctime = t; 476 477 // db: 72-119 - direct blocks 478 // id: 120-131 - indirect blocks 479 //entry.flags = DumpArchiveUtil.convert32(buffer, 132); 480 //entry.blocks = DumpArchiveUtil.convert32(buffer, 136); 481 entry.generation = DumpArchiveUtil.convert32(buffer, 140); 482 entry.setUserId(DumpArchiveUtil.convert32(buffer, 144)); 483 entry.setGroupId(DumpArchiveUtil.convert32(buffer, 148)); 484 // two 32-bit spare values. 485 header.count = DumpArchiveUtil.convert32(buffer, 160); 486 487 header.holes = 0; 488 489 for (int i = 0; (i < 512) && (i < header.count); i++) { 490 if (buffer[164 + i] == 0) { 491 header.holes++; 492 } 493 } 494 495 System.arraycopy(buffer, 164, header.cdata, 0, 512); 496 497 entry.volume = header.getVolume(); 498 499 //entry.isSummaryOnly = false; 500 return entry; 501 } 502 503 /** 504 * Update entry with information from next tape segment header. 505 */ 506 void update(final byte[] buffer) { 507 header.volume = DumpArchiveUtil.convert32(buffer, 16); 508 header.count = DumpArchiveUtil.convert32(buffer, 160); 509 510 header.holes = 0; 511 512 for (int i = 0; (i < 512) && (i < header.count); i++) { 513 if (buffer[164 + i] == 0) { 514 header.holes++; 515 } 516 } 517 518 System.arraycopy(buffer, 164, header.cdata, 0, 512); 519 } 520 521 /** 522 * Archive entry as stored on tape. There is one TSH for (at most) 523 * every 512k in the file. 524 */ 525 static class TapeSegmentHeader { 526 private DumpArchiveConstants.SEGMENT_TYPE type; 527 private int volume; 528 private int ino; 529 private int count; 530 private int holes; 531 private final byte[] cdata = new byte[512]; // map of any 'holes' 532 533 public DumpArchiveConstants.SEGMENT_TYPE getType() { 534 return type; 535 } 536 537 public int getVolume() { 538 return volume; 539 } 540 541 public int getIno() { 542 return ino; 543 } 544 545 void setIno(final int ino) { 546 this.ino = ino; 547 } 548 549 public int getCount() { 550 return count; 551 } 552 553 public int getHoles() { 554 return holes; 555 } 556 557 public int getCdata(final int idx) { 558 return cdata[idx]; 559 } 560 } 561 562 /** 563 * Returns the name of the entry. 564 * @return the name of the entry. 565 */ 566 @Override 567 public String getName() { 568 return name; 569 } 570 571 /** 572 * Returns the unmodified name of the entry. 573 * @return the name of the entry. 574 */ 575 String getOriginalName() { 576 return originalName; 577 } 578 579 /** 580 * Sets the name of the entry. 581 * @param name the name 582 */ 583 public final void setName(String name) { 584 this.originalName = name; 585 if (name != null) { 586 if (isDirectory() && !name.endsWith("/")) { 587 name += "/"; 588 } 589 if (name.startsWith("./")) { 590 name = name.substring(2); 591 } 592 } 593 this.name = name; 594 } 595 596 /** 597 * The last modified date. 598 * @return the last modified date 599 */ 600 @Override 601 public Date getLastModifiedDate() { 602 return new Date(mtime); 603 } 604 605 /** 606 * Is this a directory? 607 * @return whether this is a directory 608 */ 609 @Override 610 public boolean isDirectory() { 611 return type == TYPE.DIRECTORY; 612 } 613 614 /** 615 * Is this a regular file? 616 * @return whether this is a regular file 617 */ 618 public boolean isFile() { 619 return type == TYPE.FILE; 620 } 621 622 /** 623 * Is this a network device? 624 * @return whether this is a socket 625 */ 626 public boolean isSocket() { 627 return type == TYPE.SOCKET; 628 } 629 630 /** 631 * Is this a character device? 632 * @return whether this is a character device 633 */ 634 public boolean isChrDev() { 635 return type == TYPE.CHRDEV; 636 } 637 638 /** 639 * Is this a block device? 640 * @return whether this is a block device 641 */ 642 public boolean isBlkDev() { 643 return type == TYPE.BLKDEV; 644 } 645 646 /** 647 * Is this a fifo/pipe? 648 * @return whether this is a fifo 649 */ 650 public boolean isFifo() { 651 return type == TYPE.FIFO; 652 } 653 654 /** 655 * Get the type of the entry. 656 * @return the type 657 */ 658 public TYPE getType() { 659 return type; 660 } 661 662 /** 663 * Set the type of the entry. 664 * @param type the type 665 */ 666 public void setType(final TYPE type) { 667 this.type = type; 668 } 669 670 /** 671 * Return the access permissions on the entry. 672 * @return the access permissions 673 */ 674 public int getMode() { 675 return mode; 676 } 677 678 /** 679 * Set the access permissions on the entry. 680 * @param mode the access permissions 681 */ 682 public void setMode(final int mode) { 683 this.mode = mode & 07777; 684 this.permissions = PERMISSION.find(mode); 685 } 686 687 /** 688 * Returns the permissions on the entry. 689 * @return the permissions 690 */ 691 public Set<PERMISSION> getPermissions() { 692 return permissions; 693 } 694 695 /** 696 * Returns the size of the entry. 697 * @return the size 698 */ 699 @Override 700 public long getSize() { 701 return isDirectory() ? SIZE_UNKNOWN : size; 702 } 703 704 /** 705 * Returns the size of the entry as read from the archive. 706 */ 707 long getEntrySize() { 708 return size; 709 } 710 711 /** 712 * Set the size of the entry. 713 * @param size the size 714 */ 715 public void setSize(final long size) { 716 this.size = size; 717 } 718 719 /** 720 * Set the time the file was last modified. 721 * @param mtime the last modified time 722 */ 723 public void setLastModifiedDate(final Date mtime) { 724 this.mtime = mtime.getTime(); 725 } 726 727 /** 728 * Returns the time the file was last accessed. 729 * @return the access time 730 */ 731 public Date getAccessTime() { 732 return new Date(atime); 733 } 734 735 /** 736 * Set the time the file was last accessed. 737 * @param atime the access time 738 */ 739 public void setAccessTime(final Date atime) { 740 this.atime = atime.getTime(); 741 } 742 743 /** 744 * Return the user id. 745 * @return the user id 746 */ 747 public int getUserId() { 748 return uid; 749 } 750 751 /** 752 * Set the user id. 753 * @param uid the user id 754 */ 755 public void setUserId(final int uid) { 756 this.uid = uid; 757 } 758 759 /** 760 * Return the group id 761 * @return the group id 762 */ 763 public int getGroupId() { 764 return gid; 765 } 766 767 /** 768 * Set the group id. 769 * @param gid the group id 770 */ 771 public void setGroupId(final int gid) { 772 this.gid = gid; 773 } 774 775 public enum TYPE { 776 WHITEOUT(14), 777 SOCKET(12), 778 LINK(10), 779 FILE(8), 780 BLKDEV(6), 781 DIRECTORY(4), 782 CHRDEV(2), 783 FIFO(1), 784 UNKNOWN(15); 785 786 private int code; 787 788 private TYPE(final int code) { 789 this.code = code; 790 } 791 792 public static TYPE find(final int code) { 793 TYPE type = UNKNOWN; 794 795 for (final TYPE t : TYPE.values()) { 796 if (code == t.code) { 797 type = t; 798 } 799 } 800 801 return type; 802 } 803 } 804 805 public enum PERMISSION { 806 SETUID(04000), 807 SETGUI(02000), 808 STICKY(01000), 809 USER_READ(00400), 810 USER_WRITE(00200), 811 USER_EXEC(00100), 812 GROUP_READ(00040), 813 GROUP_WRITE(00020), 814 GROUP_EXEC(00010), 815 WORLD_READ(00004), 816 WORLD_WRITE(00002), 817 WORLD_EXEC(00001); 818 819 private int code; 820 821 private PERMISSION(final int code) { 822 this.code = code; 823 } 824 825 public static Set<PERMISSION> find(final int code) { 826 final Set<PERMISSION> set = new HashSet<>(); 827 828 for (final PERMISSION p : PERMISSION.values()) { 829 if ((code & p.code) == p.code) { 830 set.add(p); 831 } 832 } 833 834 if (set.isEmpty()) { 835 return Collections.emptySet(); 836 } 837 838 return EnumSet.copyOf(set); 839 } 840 } 841}