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-rw-r--r--repair.cc214
1 files changed, 123 insertions, 91 deletions
diff --git a/repair.cc b/repair.cc
index 7b23843..98b980c 100644
--- a/repair.cc
+++ b/repair.cc
@@ -1,5 +1,5 @@
/* Lziprecover - Data recovery tool for the lzip format
- Copyright (C) 2009-2018 Antonio Diaz Diaz.
+ Copyright (C) 2009-2019 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
@@ -31,23 +31,38 @@
#include "lzip.h"
#include "mtester.h"
-#include "block.h"
-#include "file_index.h"
+#include "lzip_index.h"
namespace {
bool pending_newline = false;
-void print_pending_newline()
- { if( pending_newline ) std::fputc( '\n', stdout ); pending_newline = false; }
+void print_pending_newline( const char terminator )
+ { if( pending_newline && terminator != '\n' ) std::fputc( '\n', stdout );
+ pending_newline = false; }
+
+
+uint8_t * read_member( const int infd, const long long mpos,
+ const long long msize )
+ {
+ if( msize <= 0 || msize > LONG_MAX )
+ { show_error( "Member is larger than LONG_MAX." ); return 0; }
+ if( !safe_seek( infd, mpos ) ) return 0;
+ uint8_t * const buffer = new uint8_t[msize];
+
+ if( readblock( infd, buffer, msize ) != msize )
+ { show_error( "Error reading input file", errno );
+ delete[] buffer; return 0; }
+ return buffer;
+ }
bool gross_damage( const long long msize, const uint8_t * const mbuffer )
{
enum { maxlen = 6 }; // max number of consecutive identical bytes
- long i = File_header::size;
- const long end = msize - File_trailer::size - maxlen;
+ long i = Lzip_header::size;
+ const long end = msize - Lzip_trailer::size - maxlen;
while( i < end )
{
const uint8_t byte = mbuffer[i];
@@ -71,10 +86,10 @@ int seek_write( const int fd, const uint8_t * const buf, const int size,
int repair_dictionary_size( const long long msize, uint8_t * const mbuffer )
{
enum { dictionary_size_9 = 1 << 25 }; // dictionary size of option -9
- File_header & header = *(File_header *)mbuffer;
+ Lzip_header & header = *(Lzip_header *)mbuffer;
unsigned dictionary_size = header.dictionary_size();
- File_trailer & trailer =
- *(File_trailer *)( mbuffer + msize - File_trailer::size );
+ const Lzip_trailer & trailer =
+ *(const Lzip_trailer *)( mbuffer + msize - Lzip_trailer::size );
const unsigned long long data_size = trailer.data_size();
const bool valid_ds = isvalid_ds( dictionary_size );
if( valid_ds && dictionary_size >= data_size ) return 0; // can't be bad
@@ -104,10 +119,33 @@ int repair_dictionary_size( const long long msize, uint8_t * const mbuffer )
}
+const LZ_mtester * prepare_master( const uint8_t * const buffer,
+ const long buffer_size,
+ const unsigned long pos_limit,
+ const unsigned dictionary_size )
+ {
+ LZ_mtester * const master =
+ new LZ_mtester( buffer, buffer_size, dictionary_size );
+ if( master->test_member( pos_limit ) == -1 ) return master;
+ delete master;
+ return 0;
+ }
+
+
+bool test_member_rest( const LZ_mtester & master, long * const failure_posp = 0 )
+ {
+ LZ_mtester mtester( master );
+ mtester.duplicate_buffer();
+ if( mtester.test_member() == 0 && mtester.finished() ) return true;
+ if( failure_posp ) *failure_posp = mtester.member_position();
+ return false;
+ }
+
+
// Return value: -1 = master failed, 0 = begin reached, >0 = repaired pos
long repair_member( const long long mpos, const long long msize,
uint8_t * const mbuffer, const long begin, const long end,
- const unsigned dictionary_size )
+ const unsigned dictionary_size, const char terminator )
{
for( long pos = end; pos >= begin && pos > end - 50000; )
{
@@ -120,7 +158,7 @@ long repair_member( const long long mpos, const long long msize,
{
if( verbosity >= 2 )
{
- std::printf( " Trying position %llu \r", mpos + pos );
+ std::printf( " Trying position %llu %c", mpos + pos, terminator );
std::fflush( stdout ); pending_newline = true;
}
for( int j = 0; j < 255; ++j )
@@ -140,65 +178,62 @@ long repair_member( const long long mpos, const long long msize,
int repair_file( const std::string & input_filename,
const std::string & default_output_filename,
- const bool force )
+ const bool force, const char terminator )
{
struct stat in_stats;
const int infd = open_instream( input_filename.c_str(), &in_stats, true, true );
if( infd < 0 ) return 1;
- Pretty_print pp( input_filename );
- const File_index file_index( infd, true, true, true );
- if( file_index.retval() != 0 )
- { show_file_error( input_filename.c_str(), file_index.error().c_str() );
- return file_index.retval(); }
+ const Lzip_index lzip_index( infd, true, true, true );
+ if( lzip_index.retval() != 0 )
+ { show_file_error( input_filename.c_str(), lzip_index.error().c_str() );
+ return lzip_index.retval(); }
output_filename = default_output_filename.empty() ?
insert_fixed( input_filename ) : default_output_filename;
if( !force && file_exists( output_filename ) ) return 1;
outfd = -1;
- for( long i = 0; i < file_index.members(); ++i )
+ for( long i = 0; i < lzip_index.members(); ++i )
{
- const long long mpos = file_index.mblock( i ).pos();
- const long long msize = file_index.mblock( i ).size();
- if( !safe_seek( infd, mpos ) )
- cleanup_and_fail( 1 );
+ const long long mpos = lzip_index.mblock( i ).pos();
+ const long long msize = lzip_index.mblock( i ).size();
+ if( !safe_seek( infd, mpos ) ) cleanup_and_fail( 1 );
long long failure_pos = 0;
- if( test_member_from_file( infd, msize, &failure_pos ) ) continue;
- if( failure_pos < File_header::size ) // End Of File
+ if( test_member_from_file( infd, msize, &failure_pos ) == 0 ) continue;
+ if( failure_pos < Lzip_header::size ) // End Of File
{ show_error( "Can't repair error in input file." );
cleanup_and_fail( 2 ); }
+ if( failure_pos >= msize - 8 ) failure_pos = msize - 8 - 1;
if( verbosity >= 2 ) // damaged member found
{
std::printf( "Repairing member %ld of %ld (failure pos = %llu)\n",
- i + 1, file_index.members(), mpos + failure_pos );
+ i + 1, lzip_index.members(), mpos + failure_pos );
std::fflush( stdout );
}
- if( failure_pos >= msize - 8 ) failure_pos = msize - 8 - 1;
uint8_t * const mbuffer = read_member( infd, mpos, msize );
- if( !mbuffer )
- cleanup_and_fail( 1 );
- const File_header & header = *(File_header *)mbuffer;
+ if( !mbuffer ) cleanup_and_fail( 1 );
+ const Lzip_header & header = *(const Lzip_header *)mbuffer;
const unsigned dictionary_size = header.dictionary_size();
long pos = 0;
if( !gross_damage( msize, mbuffer ) )
{
pos = repair_dictionary_size( msize, mbuffer );
if( pos == 0 )
- pos = repair_member( mpos, msize, mbuffer, File_header::size + 1,
- File_header::size + 5, dictionary_size );
+ pos = repair_member( mpos, msize, mbuffer, Lzip_header::size + 1,
+ Lzip_header::size + 5, dictionary_size, terminator );
if( pos == 0 )
- pos = repair_member( mpos, msize, mbuffer, File_header::size + 6,
- failure_pos, dictionary_size );
- print_pending_newline();
+ pos = repair_member( mpos, msize, mbuffer, Lzip_header::size + 6,
+ failure_pos, dictionary_size, terminator );
+ print_pending_newline( terminator );
}
- if( pos < 0 )
- cleanup_and_fail( 1 );
+ if( pos < 0 ) cleanup_and_fail( 1 );
if( pos > 0 )
{
if( outfd < 0 ) // first damaged member repaired
{
if( !safe_seek( infd, 0 ) ) return 1;
+ set_signal_handler();
if( !open_outstream( true, false ) ) { close( infd ); return 1; }
if( !copy_file( infd, outfd ) ) // copy whole file
cleanup_and_fail( 1 );
@@ -228,39 +263,39 @@ int repair_file( const std::string & input_filename,
}
-int debug_delay( const std::string & input_filename, Block range )
+int debug_delay( const std::string & input_filename, Block range,
+ const char terminator )
{
struct stat in_stats; // not used
const int infd = open_instream( input_filename.c_str(), &in_stats, true, true );
if( infd < 0 ) return 1;
- Pretty_print pp( input_filename );
- const File_index file_index( infd, false, true, true );
- if( file_index.retval() != 0 )
- { show_file_error( input_filename.c_str(), file_index.error().c_str() );
- return file_index.retval(); }
+ const Lzip_index lzip_index( infd, true, true );
+ if( lzip_index.retval() != 0 )
+ { show_file_error( input_filename.c_str(), lzip_index.error().c_str() );
+ return lzip_index.retval(); }
- if( range.end() > file_index.cdata_size() )
- range.size( std::max( 0LL, file_index.cdata_size() - range.pos() ) );
+ if( range.end() > lzip_index.cdata_size() )
+ range.size( std::max( 0LL, lzip_index.cdata_size() - range.pos() ) );
if( range.size() <= 0 )
- { pp( "Nothing to do." ); return 0; }
+ { show_file_error( input_filename.c_str(), "Nothing to do." ); return 0; }
- for( long i = 0; i < file_index.members(); ++i )
+ for( long i = 0; i < lzip_index.members(); ++i )
{
- const Block & mb = file_index.mblock( i );
+ const Block & mb = lzip_index.mblock( i );
if( !range.overlaps( mb ) ) continue;
- const long long mpos = file_index.mblock( i ).pos();
- const long long msize = file_index.mblock( i ).size();
- const unsigned dictionary_size = file_index.dictionary_size( i );
+ const long long mpos = lzip_index.mblock( i ).pos();
+ const long long msize = lzip_index.mblock( i ).size();
+ const unsigned dictionary_size = lzip_index.dictionary_size( i );
if( verbosity >= 2 )
{
std::printf( "Finding max delay in member %ld of %ld (mpos = %llu, msize = %llu)\n",
- i + 1, file_index.members(), mpos, msize );
+ i + 1, lzip_index.members(), mpos, msize );
std::fflush( stdout );
}
uint8_t * const mbuffer = read_member( infd, mpos, msize );
if( !mbuffer ) return 1;
- long pos = std::max( range.pos() - mpos, File_header::size + 1LL );
+ long pos = std::max( range.pos() - mpos, Lzip_header::size + 1LL );
const long end = std::min( range.end() - mpos, msize );
long max_delay = 0;
while( pos < end )
@@ -275,7 +310,7 @@ int debug_delay( const std::string & input_filename, Block range )
{
if( verbosity >= 2 )
{
- std::printf( " Delays at position %llu \r", mpos + pos );
+ std::printf( " Delays at position %llu %c", mpos + pos, terminator );
std::fflush( stdout ); pending_newline = true;
}
int value = -1;
@@ -299,7 +334,7 @@ int debug_delay( const std::string & input_filename, Block range )
delete master;
}
delete[] mbuffer;
- print_pending_newline();
+ print_pending_newline( terminator );
}
if( verbosity >= 1 ) std::fputs( "Done.\n", stdout );
@@ -308,40 +343,39 @@ int debug_delay( const std::string & input_filename, Block range )
int debug_repair( const std::string & input_filename,
- const Bad_byte & bad_byte )
+ const Bad_byte & bad_byte, const char terminator )
{
struct stat in_stats; // not used
const int infd = open_instream( input_filename.c_str(), &in_stats, true, true );
if( infd < 0 ) return 1;
- Pretty_print pp( input_filename );
- const File_index file_index( infd, false, true, true );
- if( file_index.retval() != 0 )
- { show_file_error( input_filename.c_str(), file_index.error().c_str() );
- return file_index.retval(); }
+ const Lzip_index lzip_index( infd, true, true );
+ if( lzip_index.retval() != 0 )
+ { show_file_error( input_filename.c_str(), lzip_index.error().c_str() );
+ return lzip_index.retval(); }
long idx = 0;
- for( ; idx < file_index.members(); ++idx )
- if( file_index.mblock( idx ).includes( bad_byte.pos ) ) break;
- if( idx >= file_index.members() )
- { pp( "Nothing to do." ); return 0; }
+ for( ; idx < lzip_index.members(); ++idx )
+ if( lzip_index.mblock( idx ).includes( bad_byte.pos ) ) break;
+ if( idx >= lzip_index.members() )
+ { show_file_error( input_filename.c_str(), "Nothing to do." ); return 0; }
- const long long mpos = file_index.mblock( idx ).pos();
- const long long msize = file_index.mblock( idx ).size();
+ const long long mpos = lzip_index.mblock( idx ).pos();
+ const long long msize = lzip_index.mblock( idx ).size();
{
long long failure_pos = 0;
if( !safe_seek( infd, mpos ) ) return 1;
- if( !test_member_from_file( infd, msize, &failure_pos ) )
+ if( test_member_from_file( infd, msize, &failure_pos ) != 0 )
{
if( verbosity >= 0 )
std::printf( "Member %ld of %ld already damaged (failure pos = %llu)\n",
- idx + 1, file_index.members(), mpos + failure_pos );
+ idx + 1, lzip_index.members(), mpos + failure_pos );
return 1;
}
}
uint8_t * const mbuffer = read_member( infd, mpos, msize );
if( !mbuffer ) return 1;
- const File_header & header = *(File_header *)mbuffer;
+ const Lzip_header & header = *(const Lzip_header *)mbuffer;
const unsigned dictionary_size = header.dictionary_size();
const uint8_t good_value = mbuffer[bad_byte.pos-mpos];
const uint8_t bad_value = bad_byte( good_value );
@@ -367,7 +401,7 @@ int debug_repair( const std::string & input_filename,
{
std::printf( "Test repairing member %ld of %ld (mpos = %llu, msize = %llu)\n"
" (damage pos = %llu (0x%02X->0x%02X), failure pos = %llu, delay = %lld )\n",
- idx + 1, file_index.members(), mpos, msize,
+ idx + 1, lzip_index.members(), mpos, msize,
bad_byte.pos, good_value, bad_value, mpos + failure_pos,
mpos + failure_pos - bad_byte.pos );
std::fflush( stdout );
@@ -375,12 +409,12 @@ int debug_repair( const std::string & input_filename,
if( failure_pos >= msize ) failure_pos = msize - 1;
long pos = repair_dictionary_size( msize, mbuffer );
if( pos == 0 )
- pos = repair_member( mpos, msize, mbuffer, File_header::size + 1,
- File_header::size + 5, dictionary_size );
+ pos = repair_member( mpos, msize, mbuffer, Lzip_header::size + 1,
+ Lzip_header::size + 5, dictionary_size, terminator );
if( pos == 0 )
- pos = repair_member( mpos, msize, mbuffer, File_header::size + 6,
- failure_pos, dictionary_size );
- print_pending_newline();
+ pos = repair_member( mpos, msize, mbuffer, Lzip_header::size + 6,
+ failure_pos, dictionary_size, terminator );
+ print_pending_newline( terminator );
delete[] mbuffer;
if( pos < 0 )
{ show_error( "Can't prepare master." ); return 1; }
@@ -398,30 +432,28 @@ int debug_decompress( const std::string & input_filename,
const int infd = open_instream( input_filename.c_str(), &in_stats, true, true );
if( infd < 0 ) return 1;
- Pretty_print pp( input_filename );
- const File_index file_index( infd, false, true, true );
- if( file_index.retval() != 0 )
- { show_file_error( input_filename.c_str(), file_index.error().c_str() );
- return file_index.retval(); }
+ const Lzip_index lzip_index( infd, true, true );
+ if( lzip_index.retval() != 0 )
+ { show_file_error( input_filename.c_str(), lzip_index.error().c_str() );
+ return lzip_index.retval(); }
outfd = show_packets ? -1 : STDOUT_FILENO;
int retval = 0;
- for( long i = 0; i < file_index.members(); ++i )
+ for( long i = 0; i < lzip_index.members(); ++i )
{
- const long long dpos = file_index.dblock( i ).pos();
- const long long mpos = file_index.mblock( i ).pos();
- const long long msize = file_index.mblock( i ).size();
- const unsigned dictionary_size = file_index.dictionary_size( i );
+ const long long dpos = lzip_index.dblock( i ).pos();
+ const long long mpos = lzip_index.mblock( i ).pos();
+ const long long msize = lzip_index.mblock( i ).size();
+ const unsigned dictionary_size = lzip_index.dictionary_size( i );
if( verbosity >= 1 && show_packets )
std::printf( "Decoding LZMA packets in member %ld of %ld (mpos = %llu, msize = %llu)\n"
" mpos dpos\n",
- i + 1, file_index.members(), mpos, msize );
+ i + 1, lzip_index.members(), mpos, msize );
if( !isvalid_ds( dictionary_size ) )
- { show_error( "Invalid dictionary size in member header." );
- retval = 2; break; }
+ { show_error( bad_dict_msg ); retval = 2; break; }
uint8_t * const mbuffer = read_member( infd, mpos, msize );
if( !mbuffer ) { retval = 1; break; }
- if( bad_byte.pos >= 0 && file_index.mblock( i ).includes( bad_byte.pos ) )
+ if( bad_byte.pos >= 0 && lzip_index.mblock( i ).includes( bad_byte.pos ) )
{
const uint8_t good_value = mbuffer[bad_byte.pos-mpos];
const uint8_t bad_value = bad_byte( good_value );
@@ -441,7 +473,7 @@ int debug_decompress( const std::string & input_filename,
mpos + mtester.member_position() );
retval = 2; break;
}
- if( i + 1 < file_index.members() && show_packets )
+ if( i + 1 < lzip_index.members() && show_packets )
std::fputc( '\n', stdout );
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-04 04:41:27 +0000