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/* Lziprecover - Data recovery tool for the lzip format
Copyright (C) 2009-2018 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/>.
*/
#define _FILE_OFFSET_BITS 64
#include <cerrno>
#include <cstdio>
#include <cstring>
#include <string>
#include <vector>
#include <stdint.h>
#include <unistd.h>
#include <utime.h>
#include <sys/stat.h>
#include "lzip.h"
#include "block.h"
#include "file_index.h"
int dump_tdata( const std::vector< std::string > & filenames,
const std::string & default_output_filename, const bool force,
const bool strip, const bool loose_trailing )
{
if( default_output_filename.empty() ) outfd = STDOUT_FILENO;
else
{
output_filename = default_output_filename;
if( !open_outstream( force, true, false, false ) ) return 1;
}
unsigned long long total_size = 0;
int files = 0, retval = 0;
bool stdin_used = false;
for( unsigned i = 0; i < filenames.size(); ++i )
{
const bool from_stdin = ( filenames[i] == "-" );
if( from_stdin ) { if( stdin_used ) continue; else stdin_used = true; }
const char * const input_filename =
from_stdin ? "(stdin)" : filenames[i].c_str();
struct stat in_stats; // not used
const int infd = from_stdin ? STDIN_FILENO :
open_instream( input_filename, &in_stats, true, true );
if( infd < 0 ) { if( retval < 1 ) retval = 1; continue; }
const File_index file_index( infd, false, true, loose_trailing );
if( file_index.retval() != 0 )
{
show_file_error( input_filename, file_index.error().c_str() );
if( retval < file_index.retval() ) retval = file_index.retval();
close( infd );
continue;
}
const unsigned long long cdata_size = file_index.cdata_size();
const long long trailing_size = file_index.file_size() - cdata_size;
if( strip )
{
total_size += cdata_size; ++files;
if( !safe_seek( infd, 0 ) || !copy_file( infd, outfd, cdata_size ) )
cleanup_and_fail( 1 );
}
else if( trailing_size > 0 )
{
total_size += trailing_size; ++files;
if( !safe_seek( infd, cdata_size ) || !copy_file( infd, outfd ) )
cleanup_and_fail( 1 );
}
close( infd );
}
if( verbosity >= 1 )
{
if( strip )
std::fprintf( stderr, "%llu bytes copied from %d file(s).\n",
total_size, files );
else
std::fprintf( stderr, "%llu trailing bytes dumped from %d file(s).\n",
total_size, files );
}
if( close_outstream( 0 ) != 0 ) return 1;
return retval;
}
int remove_tdata( const std::vector< std::string > & filenames,
const bool loose_trailing )
{
unsigned long long total_size = 0;
int files = 0, retval = 0;
for( unsigned i = 0; i < filenames.size(); ++i )
{
const char * const filename = filenames[i].c_str();
struct stat in_stats;
const int infd = open_truncable_stream( filename, &in_stats );
if( infd < 0 ) { if( retval < 1 ) retval = 1; continue; }
const File_index file_index( infd, false, true, loose_trailing );
if( file_index.retval() != 0 )
{
show_file_error( filename, file_index.error().c_str() );
if( retval < file_index.retval() ) retval = file_index.retval();
close( infd );
continue;
}
const unsigned long long cdata_size = file_index.cdata_size();
const long long trailing_size = file_index.file_size() - cdata_size;
if( trailing_size > 0 )
{
int i;
do i = ftruncate( infd, cdata_size );
while( i != 0 && errno == EINTR );
if( i == 0 )
{
struct utimbuf t;
t.actime = in_stats.st_atime;
t.modtime = in_stats.st_mtime;
utime( filename, &t );
total_size += trailing_size; ++files;
}
else
{
show_file_error( filename, "Can't truncate file", errno );
if( retval < 1 ) retval = 1;
}
}
close( infd );
}
if( verbosity >= 1 )
std::fprintf( stderr, "%llu trailing bytes removed from %d file(s).\n",
total_size, files );
return retval;
}
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