1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915
|
/* Lziprecover - Data recovery tool for the lzip format
Copyright (C) 2009-2016 Antonio Diaz Diaz.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
Exit status: 0 for a normal exit, 1 for environmental problems
(file not found, invalid flags, I/O errors, etc), 2 to indicate a
corrupt or invalid input file, 3 for an internal consistency error
(eg, bug) which caused lziprecover to panic.
*/
#define _FILE_OFFSET_BITS 64
#include <algorithm>
#include <cctype>
#include <cerrno>
#include <climits>
#include <csignal>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <vector>
#include <fcntl.h>
#include <stdint.h>
#include <unistd.h>
#include <utime.h>
#include <sys/stat.h>
#if defined(__MSVCRT__)
#include <io.h>
#define fchmod(x,y) 0
#define fchown(x,y,z) 0
#define SIGHUP SIGTERM
#define S_ISSOCK(x) 0
#define S_IRGRP 0
#define S_IWGRP 0
#define S_IROTH 0
#define S_IWOTH 0
#endif
#if defined(__OS2__)
#include <io.h>
#endif
#include "arg_parser.h"
#include "lzip.h"
#include "decoder.h"
#include "block.h"
#ifndef O_BINARY
#define O_BINARY 0
#endif
#if CHAR_BIT != 8
#error "Environments where CHAR_BIT != 8 are not supported."
#endif
std::string output_filename; // global vars for output file
int outfd = -1;
namespace {
const char * const Program_name = "Lziprecover";
const char * const program_name = "lziprecover";
const char * const program_year = "2016";
const char * invocation_name = 0;
struct { const char * from; const char * to; } const known_extensions[] = {
{ ".lz", "" },
{ ".tlz", ".tar" },
{ 0, 0 } };
enum Mode { m_none, m_alone_to_lz, m_debug_decompress, m_debug_delay,
m_debug_repair, m_decompress, m_list, m_merge, m_range_dec,
m_repair, m_show_packets, m_split, m_test };
int verbosity = 0;
bool delete_output_on_interrupt = false;
void show_help()
{
std::printf( "%s - Data recovery tool and decompressor for the lzip format.\n", Program_name );
std::printf( "\nLziprecover can repair perfectly most files with small errors (up to one\n"
"single-byte error per member), without the need of any extra redundance\n"
"at all. Losing an entire archive just because of a corrupt byte near the\n"
"beginning is a thing of the past.\n"
"\nLziprecover can also produce a correct file by merging the good parts of\n"
"two or more damaged copies, extract data from damaged files, decompress\n"
"files and test integrity of files.\n"
"\nLziprecover is not a replacement for regular backups, but a last line of\n"
"defense for the case where the backups are also damaged.\n"
"\nUsage: %s [options] [files]\n", invocation_name );
std::printf( "\nOptions:\n"
" -h, --help display this help and exit\n"
" -V, --version output version information and exit\n"
" -a, --trailing-error exit with error status if trailing data\n"
" -A, --alone-to-lz convert lzma-alone files to lzip format\n"
" -c, --stdout write to standard output, keep input files\n"
" -d, --decompress decompress\n"
" -D, --range-decompress=<range> decompress a range of bytes (N-M) to stdout\n"
" -f, --force overwrite existing output files\n"
" -i, --ignore-errors make '--range-decompress' ignore data errors\n"
" -k, --keep keep (don't delete) input files\n"
" -l, --list print total file sizes and ratios\n"
" -m, --merge correct errors in file using several copies\n"
" -o, --output=<file> place the output into <file>\n"
" -q, --quiet suppress all messages\n"
" -R, --repair try to repair a small error in file\n"
" -s, --split split multimember file in single-member files\n"
" -t, --test test compressed file integrity\n"
" -v, --verbose be verbose (a 2nd -v gives more)\n" );
if( verbosity >= 1 )
{
std::printf( " -W, --debug-decompress=<pos>,<val> set pos to val and decompress to stdout\n"
" -X, --show-packets[=<pos>,<val>] show in stdout the decoded LZMA packets\n"
" -Y, --debug-delay=<range> find max error detection delay in <range>\n"
" -Z, --debug-repair=<pos>,<val> test repair one-byte error at <pos>\n" );
}
std::printf( "If no file names are given, or if a file is '-', lziprecover decompresses\n"
"from standard input to standard output.\n"
"Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n"
"Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n"
"\nExit status: 0 for a normal exit, 1 for environmental problems (file\n"
"not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt or\n"
"invalid input file, 3 for an internal consistency error (eg, bug) which\n"
"caused lziprecover to panic.\n"
"\nReport bugs to lzip-bug@nongnu.org\n"
"Lziprecover home page: http://www.nongnu.org/lzip/lziprecover.html\n" );
}
void show_version()
{
std::printf( "%s %s\n", program_name, PROGVERSION );
std::printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
std::printf( "License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>\n"
"This is free software: you are free to change and redistribute it.\n"
"There is NO WARRANTY, to the extent permitted by law.\n" );
}
} // end namespace
void show_header( const unsigned dictionary_size, const int vlevel )
{
if( verbosity >= vlevel )
{
const char * const prefix[8] =
{ "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
enum { factor = 1024 };
const char * p = "";
const char * np = " ";
unsigned num = dictionary_size;
bool exact = ( num % factor == 0 );
for( int i = 0; i < 8 && ( num > 9999 || ( exact && num >= factor ) ); ++i )
{ num /= factor; if( num % factor != 0 ) exact = false;
p = prefix[i]; np = ""; }
std::fprintf( stderr, "dictionary size %s%4u %sB. ", np, num, p );
}
}
namespace {
// Returns the number of chars read, or 0 if error.
//
int parse_long_long( const char * const ptr, long long & value )
{
char * tail;
errno = 0;
value = strtoll( ptr, &tail, 0 );
if( tail == ptr || errno || value < 0 ) return 0;
int c = tail - ptr;
if( ptr[c] )
{
const int factor = ( ptr[c+1] == 'i' ) ? 1024 : 1000;
int exponent = 0;
switch( ptr[c] )
{
case 'Y': exponent = 8; break;
case 'Z': exponent = 7; break;
case 'E': exponent = 6; break;
case 'P': exponent = 5; break;
case 'T': exponent = 4; break;
case 'G': exponent = 3; break;
case 'M': exponent = 2; break;
case 'K': if( factor == 1024 ) exponent = 1; else return 0; break;
case 'k': if( factor == 1000 ) exponent = 1; else return 0; break;
}
if( exponent > 0 )
{
++c;
if( ptr[c] == 'i' ) { ++c; if( value ) format_num( 0, 0, -1 ); }
if( ptr[c] == 'B' ) ++c;
for( int i = 0; i < exponent; ++i )
{
if( INT64_MAX / factor >= value ) value *= factor;
else return 0;
}
}
}
return c;
}
// Recognized formats: <begin> <begin>-<end> <begin>,<size> ,<size>
//
void parse_range( const char * const ptr, Block & range )
{
long long value = 0;
const bool size_only = ( ptr[0] == ',' );
int c = size_only ? 0 : parse_long_long( ptr, value ); // pos
if( size_only || ( c && value >= 0 && value < INT64_MAX &&
( ptr[c] == 0 || ptr[c] == ',' || ptr[c] == '-' ) ) )
{
range.pos( value );
if( ptr[c] == 0 ) { range.size( INT64_MAX - value ); return; }
const bool issize = ( ptr[c] == ',' );
c = parse_long_long( ptr + c + 1, value ); // size
if( c && value > 0 && ( issize || value > range.pos() ) )
{
if( !issize ) value -= range.pos();
if( INT64_MAX - range.pos() >= value ) { range.size( value ); return; }
}
}
show_error( "Bad decompression range.", 0, true );
std::exit( 1 );
}
// Recognized format: <pos>,<value>
//
void parse_pos_value( const char * const ptr, long long & pos, uint8_t & value )
{
long long val = 0;
int c = parse_long_long( ptr, val ); // pos
if( c && val >= 0 && val < INT64_MAX && ptr[c] == ',' )
{
pos = val;
c = parse_long_long( ptr + c + 1, val ); // value
if( c && val >= 0 && val < 256 )
{ value = val; return; }
}
show_error( "Bad file position or byte value.", 0, true );
std::exit( 1 );
}
void one_file( const int files )
{
if( files != 1 )
{
show_error( "You must specify exactly 1 file.", 0, true );
std::exit( 1 );
}
}
void set_mode( Mode & program_mode, const Mode new_mode )
{
if( program_mode != m_none && program_mode != new_mode )
{
show_error( "Only one operation can be specified.", 0, true );
std::exit( 1 );
}
program_mode = new_mode;
}
int extension_index( const std::string & name )
{
for( int i = 0; known_extensions[i].from; ++i )
{
const std::string ext( known_extensions[i].from );
if( name.size() > ext.size() &&
name.compare( name.size() - ext.size(), ext.size(), ext ) == 0 )
return i;
}
return -1;
}
} // end namespace
int open_instream( const char * const name, struct stat * const in_statsp,
const bool no_ofile, const bool reg_only )
{
int infd = open( name, O_RDONLY | O_BINARY );
if( infd < 0 )
{
if( verbosity >= 0 )
std::fprintf( stderr, "%s: Can't open input file '%s': %s\n",
program_name, name, std::strerror( errno ) );
}
else
{
const int i = fstat( infd, in_statsp );
const mode_t mode = in_statsp->st_mode;
const bool can_read = ( i == 0 && !reg_only &&
( S_ISBLK( mode ) || S_ISCHR( mode ) ||
S_ISFIFO( mode ) || S_ISSOCK( mode ) ) );
if( i != 0 || ( !S_ISREG( mode ) && ( !can_read || !no_ofile ) ) )
{
if( verbosity >= 0 )
std::fprintf( stderr, "%s: Input file '%s' is not a regular file%s.\n",
program_name, name,
( can_read && !no_ofile ) ?
",\n and '--stdout' was not specified" : "" );
close( infd );
infd = -1;
}
}
return infd;
}
namespace {
void set_a_outname( const std::string & name )
{
output_filename = name;
if( name.size() > 5 && name.compare( name.size() - 5, 5, ".lzma" ) == 0 )
output_filename.erase( name.size() - 2 );
else if( name.size() > 4 && name.compare( name.size() - 4, 4, ".tlz" ) == 0 )
output_filename.insert( name.size() - 2, "ar." );
else if( name.size() <= 3 || name.compare( name.size() - 3, 3, ".lz" ) != 0 )
output_filename += known_extensions[0].from;
}
void set_d_outname( const std::string & name, const int i )
{
if( i >= 0 )
{
const std::string from( known_extensions[i].from );
if( name.size() > from.size() )
{
output_filename.assign( name, 0, name.size() - from.size() );
output_filename += known_extensions[i].to;
return;
}
}
output_filename = name; output_filename += ".out";
if( verbosity >= 1 )
std::fprintf( stderr, "%s: Can't guess original name for '%s' -- using '%s'\n",
program_name, name.c_str(), output_filename.c_str() );
}
} // end namespace
bool open_outstream( const bool force, const bool from_stdin,
const bool rw, const bool skipping )
{
const mode_t usr_rw = S_IRUSR | S_IWUSR;
const mode_t all_rw = usr_rw | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
const mode_t outfd_mode = from_stdin ? all_rw : usr_rw;
int flags = O_CREAT | ( rw ? O_RDWR : O_WRONLY ) | O_BINARY;
if( force ) flags |= O_TRUNC; else flags |= O_EXCL;
outfd = open( output_filename.c_str(), flags, outfd_mode );
if( outfd >= 0 ) delete_output_on_interrupt = true;
else if( verbosity >= 0 )
{
if( errno == EEXIST )
std::fprintf( stderr, "%s: Output file '%s' already exists%s.\n",
program_name, output_filename.c_str(), skipping ?
", skipping" : ". Use '--force' to overwrite it" );
else
std::fprintf( stderr, "%s: Can't create output file '%s': %s\n",
program_name, output_filename.c_str(), std::strerror( errno ) );
}
return ( outfd >= 0 );
}
bool file_exists( const std::string & filename )
{
struct stat st;
if( stat( filename.c_str(), &st ) == 0 )
{
if( verbosity >= 0 )
std::fprintf( stderr, "%s: Output file '%s' already exists."
" Use '--force' to overwrite it.\n",
program_name, filename.c_str() );
return true;
}
return false;
}
bool check_tty( const int infd, const Mode program_mode )
{
if( program_mode == m_alone_to_lz && isatty( outfd ) )
{
show_error( "I won't write compressed data to a terminal.", 0, true );
return false;
}
if( isatty( infd ) ) // all modes read compressed data
{
show_error( "I won't read compressed data from a terminal.", 0, true );
return false;
}
return true;
}
void cleanup_and_fail( const int retval )
{
if( delete_output_on_interrupt )
{
delete_output_on_interrupt = false;
if( verbosity >= 0 )
std::fprintf( stderr, "%s: Deleting output file '%s', if it exists.\n",
program_name, output_filename.c_str() );
if( outfd >= 0 ) { close( outfd ); outfd = -1; }
if( std::remove( output_filename.c_str() ) != 0 && errno != ENOENT )
show_error( "WARNING: deletion of output file (apparently) failed." );
}
std::exit( retval );
}
namespace {
// Set permissions, owner and times.
void close_and_set_permissions( const struct stat * const in_statsp )
{
bool warning = false;
if( in_statsp )
{
const mode_t mode = in_statsp->st_mode;
// fchown will in many cases return with EPERM, which can be safely ignored.
if( fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ) == 0 )
{ if( fchmod( outfd, mode ) != 0 ) warning = true; }
else
if( errno != EPERM ||
fchmod( outfd, mode & ~( S_ISUID | S_ISGID | S_ISVTX ) ) != 0 )
warning = true;
}
if( close( outfd ) != 0 )
{
show_error( "Error closing output file", errno );
cleanup_and_fail( 1 );
}
outfd = -1;
delete_output_on_interrupt = false;
if( in_statsp )
{
struct utimbuf t;
t.actime = in_statsp->st_atime;
t.modtime = in_statsp->st_mtime;
if( utime( output_filename.c_str(), &t ) != 0 ) warning = true;
}
if( warning && verbosity >= 1 )
show_error( "Can't change output file attributes." );
}
unsigned char xdigit( const int value )
{
if( value >= 0 && value <= 9 ) return '0' + value;
if( value >= 10 && value <= 15 ) return 'A' + value - 10;
return 0;
}
bool show_trailing_data( const uint8_t * const data, const int size,
const Pretty_print & pp, const bool all,
const bool ignore_trailing )
{
if( verbosity >= 4 || !ignore_trailing )
{
std::string msg;
if( !all ) msg = "first bytes of ";
msg += "trailing data = ";
bool text = true;
for( int i = 0; i < size; ++i )
if( !std::isprint( data[i] ) ) { text = false; break; }
if( text )
{
msg += '\'';
msg.append( (const char *)data, size );
msg += '\'';
}
else
{
for( int i = 0; i < size; ++i )
{
if( i > 0 ) msg += ' ';
msg += xdigit( data[i] >> 4 );
msg += xdigit( data[i] & 0x0F );
}
}
pp( msg.c_str() );
if( !ignore_trailing ) show_error( "Trailing data not allowed." );
}
return ignore_trailing;
}
int decompress( const int infd, const Pretty_print & pp,
const bool ignore_trailing, const bool testing )
{
int retval = 0;
try {
unsigned long long partial_file_pos = 0;
Range_decoder rdec( infd );
for( bool first_member = true; ; first_member = false )
{
File_header header;
rdec.reset_member_position();
const int size = rdec.read_data( header.data, File_header::size );
if( rdec.finished() ) // End Of File
{
if( first_member || header.verify_prefix( size ) )
{ pp( "File ends unexpectedly at member header." ); retval = 2; }
else if( size > 0 && !show_trailing_data( header.data, size, pp,
true, ignore_trailing ) )
retval = 2;
break;
}
if( !header.verify_magic() )
{
if( first_member )
{ pp( "Bad magic number (file not in lzip format)." ); retval = 2; }
else if( !show_trailing_data( header.data, size, pp, false, ignore_trailing ) )
retval = 2;
break;
}
if( !header.verify_version() )
{
if( verbosity >= 0 )
{ pp();
std::fprintf( stderr, "Version %d member format not supported.\n",
header.version() ); }
retval = 2; break;
}
const unsigned dictionary_size = header.dictionary_size();
if( !isvalid_ds( dictionary_size ) )
{ pp( "Invalid dictionary size in member header." ); retval = 2; break; }
if( verbosity >= 2 || ( verbosity == 1 && first_member ) )
{ pp(); show_header( dictionary_size ); }
LZ_decoder decoder( rdec, dictionary_size, outfd );
const int result = decoder.decode_member( pp );
partial_file_pos += rdec.member_position();
if( result != 0 )
{
if( verbosity >= 0 && result <= 2 )
{
pp();
std::fprintf( stderr, "%s at pos %llu\n", ( result == 2 ) ?
"File ends unexpectedly" : "Decoder error",
partial_file_pos );
}
retval = 2; break;
}
if( verbosity >= 2 )
{ std::fputs( testing ? "ok\n" : "done\n", stderr ); pp.reset(); }
}
}
catch( std::bad_alloc ) { pp( "Not enough memory." ); retval = 1; }
catch( Error e ) { pp(); show_error( e.msg, errno ); retval = 1; }
if( verbosity == 1 && retval == 0 )
std::fputs( testing ? "ok\n" : "done\n", stderr );
return retval;
}
extern "C" void signal_handler( int )
{
show_error( "Control-C or similar caught, quitting." );
cleanup_and_fail( 1 );
}
void set_signals()
{
std::signal( SIGHUP, signal_handler );
std::signal( SIGINT, signal_handler );
std::signal( SIGTERM, signal_handler );
}
} // end namespace
int close_outstream( const struct stat * const in_statsp )
{
if( delete_output_on_interrupt )
close_and_set_permissions( in_statsp );
if( outfd >= 0 && close( outfd ) != 0 )
{ show_error( "Can't close stdout", errno ); return 1; }
outfd = -1;
return 0;
}
std::string insert_fixed( std::string name )
{
if( name.size() > 7 && name.compare( name.size() - 7, 7, ".tar.lz" ) == 0 )
name.insert( name.size() - 7, "_fixed" );
else if( name.size() > 3 && name.compare( name.size() - 3, 3, ".lz" ) == 0 )
name.insert( name.size() - 3, "_fixed" );
else if( name.size() > 4 && name.compare( name.size() - 4, 4, ".tlz" ) == 0 )
name.insert( name.size() - 4, "_fixed" );
else name += "_fixed.lz";
return name;
}
void show_error( const char * const msg, const int errcode, const bool help )
{
if( verbosity < 0 ) return;
if( msg && msg[0] )
{
std::fprintf( stderr, "%s: %s", program_name, msg );
if( errcode > 0 ) std::fprintf( stderr, ": %s", std::strerror( errcode ) );
std::fputc( '\n', stderr );
}
if( help )
std::fprintf( stderr, "Try '%s --help' for more information.\n",
invocation_name );
}
void internal_error( const char * const msg )
{
if( verbosity >= 0 )
std::fprintf( stderr, "%s: internal error: %s\n", program_name, msg );
std::exit( 3 );
}
void show_error2( const char * const msg1, const char * const name,
const char * const msg2 )
{
if( verbosity >= 0 )
std::fprintf( stderr, "%s: %s '%s' %s\n", program_name, msg1, name, msg2 );
}
void show_error4( const char * const msg1, const char * const name1,
const char * const name2, const char * const msg2 )
{
if( verbosity >= 0 )
std::fprintf( stderr, "%s: %s '%s' and '%s' %s\n",
program_name, msg1, name1, name2, msg2 );
}
int main( const int argc, const char * const argv[] )
{
Block range( 0, 0 );
long long bad_pos = -1;
std::string input_filename;
std::string default_output_filename;
std::vector< std::string > filenames;
int infd = -1;
Mode program_mode = m_none;
uint8_t bad_value = 0;
bool force = false;
bool ignore_errors = false;
bool ignore_trailing = true;
bool keep_input_files = false;
bool to_stdout = false;
invocation_name = argv[0];
const Arg_parser::Option options[] =
{
{ 'a', "trailing-error", Arg_parser::no },
{ 'A', "alone-to-lz", Arg_parser::no },
{ 'c', "stdout", Arg_parser::no },
{ 'd', "decompress", Arg_parser::no },
{ 'D', "range-decompress", Arg_parser::yes },
{ 'f', "force", Arg_parser::no },
{ 'h', "help", Arg_parser::no },
{ 'i', "ignore-errors", Arg_parser::no },
{ 'k', "keep", Arg_parser::no },
{ 'l', "list", Arg_parser::no },
{ 'm', "merge", Arg_parser::no },
{ 'n', "threads", Arg_parser::yes },
{ 'o', "output", Arg_parser::yes },
{ 'q', "quiet", Arg_parser::no },
{ 'R', "repair", Arg_parser::no },
{ 's', "split", Arg_parser::no },
{ 't', "test", Arg_parser::no },
{ 'v', "verbose", Arg_parser::no },
{ 'V', "version", Arg_parser::no },
{ 'W', "debug-decompress", Arg_parser::yes },
{ 'X', "show-packets", Arg_parser::maybe },
{ 'Y', "debug-delay", Arg_parser::yes },
{ 'Z', "debug-repair", Arg_parser::yes },
{ 0 , 0, Arg_parser::no } };
const Arg_parser parser( argc, argv, options );
if( parser.error().size() ) // bad option
{ show_error( parser.error().c_str(), 0, true ); return 1; }
int argind = 0;
for( ; argind < parser.arguments(); ++argind )
{
const int code = parser.code( argind );
if( !code ) break; // no more options
const std::string & arg = parser.argument( argind );
const char * const ptr = arg.c_str();
switch( code )
{
case 'a': ignore_trailing = false; break;
case 'A': set_mode( program_mode, m_alone_to_lz ); break;
case 'c': to_stdout = true; break;
case 'd': set_mode( program_mode, m_decompress ); break;
case 'D': set_mode( program_mode, m_range_dec );
parse_range( ptr, range ); break;
case 'f': force = true; break;
case 'h': show_help(); return 0;
case 'i': ignore_errors = true; break;
case 'k': keep_input_files = true; break;
case 'l': set_mode( program_mode, m_list ); break;
case 'm': set_mode( program_mode, m_merge ); break;
case 'n': break;
case 'o': default_output_filename = arg; break;
case 'q': verbosity = -1; break;
case 'R': set_mode( program_mode, m_repair ); break;
case 's': set_mode( program_mode, m_split ); break;
case 't': set_mode( program_mode, m_test ); break;
case 'v': if( verbosity < 4 ) ++verbosity; break;
case 'V': show_version(); return 0;
case 'W': set_mode( program_mode, m_debug_decompress );
parse_pos_value( ptr, bad_pos, bad_value ); break;
case 'X': set_mode( program_mode, m_show_packets );
if( ptr[0] ) parse_pos_value( ptr, bad_pos, bad_value ); break;
case 'Y': set_mode( program_mode, m_debug_delay );
parse_range( ptr, range ); break;
case 'Z': set_mode( program_mode, m_debug_repair );
parse_pos_value( ptr, bad_pos, bad_value ); break;
default : internal_error( "uncaught option." );
}
} // end process options
#if defined(__MSVCRT__) || defined(__OS2__)
setmode( STDIN_FILENO, O_BINARY );
setmode( STDOUT_FILENO, O_BINARY );
#endif
if( program_mode == m_none )
{
show_error( "You must specify the operation to be performed.", 0, true );
return 1;
}
bool filenames_given = false;
for( ; argind < parser.arguments(); ++argind )
{
filenames.push_back( parser.argument( argind ) );
if( filenames.back() != "-" ) filenames_given = true;
}
try {
switch( program_mode )
{
case m_none: internal_error( "invalid operation." ); break;
case m_alone_to_lz: break;
case m_debug_decompress:
one_file( filenames.size() );
return debug_decompress( filenames[0], bad_pos, verbosity, bad_value, false );
case m_debug_delay:
one_file( filenames.size() );
return debug_delay( filenames[0], range, verbosity );
case m_debug_repair:
one_file( filenames.size() );
return debug_repair( filenames[0], bad_pos, verbosity, bad_value );
case m_decompress: break;
case m_list:
if( filenames.size() < 1 )
{ show_error( "You must specify at least 1 file.", 0, true ); return 1; }
return list_files( filenames, verbosity );
case m_merge:
if( filenames.size() < 2 )
{ show_error( "You must specify at least 2 files.", 0, true ); return 1; }
set_signals();
return merge_files( filenames, default_output_filename, verbosity, force );
case m_range_dec:
one_file( filenames.size() );
set_signals();
return range_decompress( filenames[0], default_output_filename, range,
verbosity, force, ignore_errors, to_stdout );
case m_repair:
one_file( filenames.size() );
set_signals();
return repair_file( filenames[0], default_output_filename, verbosity,
force );
case m_show_packets:
one_file( filenames.size() );
return debug_decompress( filenames[0], bad_pos, verbosity, bad_value, true );
case m_split:
one_file( filenames.size() );
set_signals();
return split_file( filenames[0], default_output_filename, verbosity, force );
case m_test: break;
}
}
catch( std::bad_alloc )
{ show_error( "Not enough memory." ); cleanup_and_fail( 1 ); }
catch( Error e ) { show_error( e.msg, errno ); cleanup_and_fail( 1 ); }
if( program_mode == m_test )
outfd = -1;
else if( program_mode != m_alone_to_lz && program_mode != m_decompress )
internal_error( "invalid decompressor operation." );
if( filenames.empty() ) filenames.push_back("-");
if( !to_stdout && program_mode != m_test &&
( filenames_given || default_output_filename.size() ) )
set_signals();
Pretty_print pp( filenames, verbosity );
int retval = 0;
bool stdin_used = false;
for( unsigned i = 0; i < filenames.size(); ++i )
{
struct stat in_stats;
output_filename.clear();
if( filenames[i].empty() || filenames[i] == "-" )
{
if( stdin_used ) continue; else stdin_used = true;
input_filename.clear();
infd = STDIN_FILENO;
if( program_mode != m_test )
{
if( to_stdout || default_output_filename.empty() )
outfd = STDOUT_FILENO;
else
{
output_filename = default_output_filename;
if( program_mode == m_alone_to_lz &&
extension_index( default_output_filename ) < 0 )
output_filename += known_extensions[0].from;
if( !open_outstream( force, true ) )
{
if( retval < 1 ) retval = 1;
close( infd ); infd = -1;
continue;
}
}
}
}
else
{
input_filename = filenames[i];
infd = open_instream( input_filename.c_str(), &in_stats,
to_stdout || program_mode == m_test );
if( infd < 0 ) { if( retval < 1 ) retval = 1; continue; }
if( program_mode != m_test )
{
if( to_stdout ) outfd = STDOUT_FILENO;
else
{
if( program_mode == m_alone_to_lz )
set_a_outname( input_filename );
else set_d_outname( input_filename, extension_index( input_filename ) );
if( !open_outstream( force, false ) )
{
if( retval < 1 ) retval = 1;
close( infd ); infd = -1;
continue;
}
}
}
}
if( !check_tty( infd, program_mode ) )
{
if( retval < 1 ) retval = 1;
cleanup_and_fail( retval );
}
const struct stat * const in_statsp = input_filename.size() ? &in_stats : 0;
pp.set_name( input_filename );
int tmp;
if( program_mode == m_alone_to_lz )
tmp = alone_to_lz( infd, pp );
else
tmp = decompress( infd, pp, ignore_trailing, program_mode == m_test );
if( tmp > retval ) retval = tmp;
if( tmp && program_mode != m_test ) cleanup_and_fail( retval );
if( delete_output_on_interrupt )
close_and_set_permissions( in_statsp );
if( input_filename.size() )
{
close( infd ); infd = -1;
if( !keep_input_files && !to_stdout && program_mode != m_test )
std::remove( input_filename.c_str() );
}
}
if( outfd >= 0 && close( outfd ) != 0 )
{
show_error( "Can't close stdout", errno );
if( retval < 1 ) retval = 1;
}
return retval;
}
|