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/* Ztest - verify integrity of compressed files
Copyright (C) 2010 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 3 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/>.
*/
void show_ztest_help() throw()
{
std::printf( "Ztest verifies the integrity of the specified compressed files.\n" );
std::printf( "Non-compressed files are ignored. If no files are specified, the\n" );
std::printf( "integrity of compressed data read from standard input is verified. Data\n" );
std::printf( "read from standard input must be all compressed with the same compressor.\n" );
std::printf( "The supported compressors are bzip2, gzip, lzip and xz.\n" );
std::printf( "\nUsage: ztest [options] [files]\n" );
std::printf( "\nExit status is 2 if any compressed file is corrupt, 0 otherwise.\n" );
std::printf( "\nOptions:\n" );
std::printf( " -h, --help display this help and exit\n" );
std::printf( " -V, --version output version information and exit\n" );
std::printf( " -q, --quiet suppress all messages\n" );
std::printf( " -r, --recursive operate recursively on directories\n" );
std::printf( " -v, --verbose be verbose (a 2nd -v gives more)\n" );
show_help_addr();
}
int ztest_stdin( const int infd,
const std::vector< const char * > & ztest_args )
{
std::string file_type;
const uint8_t * magic_data;
int magic_size = 0;
if( !test_format( infd, file_type, &magic_data, &magic_size ) )
{ show_error( "Unknown data format read from stdin." ); return 2; }
int fda[2];
if( pipe( fda ) < 0 )
{ show_error( "Can't create pipe", errno ); return 1; }
const pid_t pid = fork();
if( pid == 0 ) // child (decompressor)
{
if( dup2( fda[0], STDIN_FILENO ) >= 0 &&
close( fda[0] ) == 0 && close( fda[1] ) == 0 )
{
const char ** const argv = new const char *[ztest_args.size()+3];
argv[0] = file_type.c_str();
for( unsigned int i = 0; i < ztest_args.size(); ++i )
argv[i+1] = ztest_args[i];
argv[ztest_args.size()+1] = "-t";
argv[ztest_args.size()+2] = 0;
execvp( argv[0], (char **)argv );
}
show_exec_error( file_type.c_str() );
_exit( 1 );
}
// parent
if( pid < 0 )
{ show_fork_error( file_type.c_str() ); return 1; }
close( fda[0] );
if( !feed_data( infd, fda[1], magic_data, magic_size ) ) return 1;
if( close( fda[1] ) != 0 )
{ show_close_error( "data feeder" ); return 1; }
return wait_for_child( pid, file_type.c_str() );
}
int ztest_file( const int infd, const std::string & input_filename,
const std::vector< const char * > & ztest_args )
{
std::string file_type;
const uint8_t * magic_data;
int magic_size = 0;
if( !test_format( infd, file_type, &magic_data, &magic_size ) )
return 0; // ignored
const pid_t pid = fork();
if( pid == 0 ) // child (decompressor)
{
const char ** const argv = new const char *[ztest_args.size()+5];
argv[0] = file_type.c_str();
for( unsigned int i = 0; i < ztest_args.size(); ++i )
argv[i+1] = ztest_args[i];
argv[ztest_args.size()+1] = "-t";
argv[ztest_args.size()+2] = "--";
argv[ztest_args.size()+3] = input_filename.c_str();
argv[ztest_args.size()+4] = 0;
execvp( argv[0], (char **)argv );
show_exec_error( file_type.c_str() );
_exit( 1 );
}
// parent
if( pid < 0 )
{ show_fork_error( file_type.c_str() ); return 1; }
return wait_for_child( pid, file_type.c_str() );
}
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