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/* GNU ddrescue - Data recovery tool
Copyright (C) 2004-2026 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 <cctype>
#include <cerrno>
#include <cstring>
#include <stdint.h>
#include <unistd.h>
#include <sys/stat.h>
#include "mapfile.h"
#include "mapbook.h"
#include "rational.h"
#include "rescuebook.h"
int Rescuebook::copy_command( const char * const command )
{
long long pos, size;
const int n = std::sscanf( command, "%lli %lli", &pos, &size );
if( n != 2 || pos < 0 || size <= 0 ) return 1;
const long long end = Block( pos, size ).end();
while( pos < end )
{
Block b( pos, softbs() );
find_chunk( b, Sblock::non_tried, domain(), softbs(), false, true );
if( b.size() <= 0 || b.pos() >= end ) break;
if( b.end() > end ) b.size( end - b.pos() );
pos = b.end();
int copied_size = 0, error_size = 0;
int retval = copy_block( b, copied_size, error_size );
if( retval ) return retval;
if( copied_size + error_size < b.size() ) // EOF
{
if( complete_only ) truncate_domain( b.pos() + copied_size + error_size );
else if( !truncate_vector( b.pos() + copied_size + error_size ) )
{ final_msg( iname_, early_eof_msg ); retval = 1; }
}
if( copied_size > 0 )
change_chunk_status( Block( b.pos(), copied_size ), Sblock::finished );
if( error_size > 0 )
{
change_chunk_status( Block( b.pos() + copied_size, error_size ),
Sblock::bad_sector );
struct stat istat;
if( stat( iname_, &istat ) != 0 )
{ final_msg( iname_, disap_msg, errno ); retval = 1; }
}
if( retval ) return retval;
}
return 0;
}
int Rescuebook::status_command( const char * const command ) const
{
long long pos, size;
const int n = std::sscanf( command, "%lli %lli", &pos, &size );
if( n != 2 || pos < 0 || size <= 0 ) return 1;
const Block b( pos, size );
const long index = find_index( pos );
if( index < 0 ) return 1;
for( long i = index; i < sblocks(); ++i )
{
const Sblock & sb = sblock( i );
if( sb.pos() >= b.end() ) break;
if( !domain().includes( sb ) && domain() < sb ) break;
Block c( sb ); c.crop( b );
std::printf( "0x%08llX 0x%08llX %c\n", c.pos(), c.size(), sb.status() );
}
return 0;
}
// Return values: 1 write error/unknown command, 0 OK.
//
int Rescuebook::do_commands( const int ides, const int odes )
{
ides_ = ides; odes_ = odes;
// set_signals(); // ignore signals
initial_time();
int retval = 0;
while( true )
{
std::string command;
while( true )
{
const int c = std::fgetc( stdin );
if( c == '\n' ) { if( command.size() ) break; else continue; }
if( c == EOF ) { command = "f"; break; } // discard partial command
if( !std::isspace( c ) ) command += c;
else if( command.size() && !std::isspace( command.end()[-1] ) )
command += ' ';
}
if( command == "q" ) break;
int tmp = 0; // -1 finish, 0 OK, 1 error, 2 fatal error
const bool finish = command == "f";
if( finish || command == "u" )
{
if( finish ) compact_sblock_vector();
if( !update_mapfile( odes_, true ) )
{ if( finish ) { emergency_save(); tmp = 2; } else tmp = 1; }
else if( finish ) tmp = -1;
}
else if( command.size() > 1 && command[0] == 'c' )
tmp = copy_command( command.c_str() + 1 );
else if( command.size() > 1 && command[0] == 's' )
tmp = status_command( command.c_str() + 1 );
else { std::printf( "error: unknown command '%s'\n", command.c_str() );
retval = 1; if( safe_fflush( stdout ) ) continue; else tmp = 2; }
if( tmp <= 0 ) std::fputs( "done\n", stdout );
else
{
if( final_msg().size() )
{ printf( "error: %s%s%s\n", final_msg().c_str(),
( final_errno() > 0 ) ? ": " : "",
( final_errno() > 0 ) ? std::strerror( final_errno() ) : "" );
final_msg( "" ); }
else std::fputs( "error\n", stdout );
}
if( !safe_fflush( stdout ) ) tmp = 2;
if( tmp ) { if( tmp > 0 ) retval = 1; if( tmp != 1 ) break; }
}
if( close( odes_ ) != 0 )
{ show_file_error( oname_, "Error closing outfile", errno );
if( retval == 0 ) retval = 1; }
return retval;
}
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