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/* Unzcrash - A test program written to test robustness to
decompression of corrupted data.
Inspired by unzcrash.c from Julian Seward's bzip2.
Copyright (C) 2008, 2009 Antonio Diaz Diaz.
This program is free software: you have unlimited permission
to copy, distribute and modify it.
Usage is:
unzcrash "lzip -tv" filename.lz
This program reads the specified file and then repeatedly
decompresses it, increasing 256 times each byte of the compressed
data, so as to test all possible one-byte errors. This should not
cause any invalid memory accesses. If it does, please, report it as
a bug.
Compile this file with the command:
g++ -O2 -Wall -W -o unzcrash testsuite/unzcrash.cc
*/
#include <cstdio>
#include <cstdlib>
#include <stdint.h>
#include <signal.h>
#include <unistd.h>
int main( const int argc, const char * argv[] )
{
if( argc < 3 )
{
std::fprintf( stderr, "Usage: unzcrash \"lzip -tv\" filename.lz\n" );
return 1;
}
FILE *f = std::fopen( argv[2], "rb" );
if( !f )
{
std::fprintf( stderr, "Can't open file `%s' for reading\n", argv[2] );
return 1;
}
const int buffer_size = 1 << 20;
uint8_t buffer[buffer_size];
const int size = std::fread( buffer, 1, buffer_size, f );
if( size >= buffer_size )
{
std::fprintf( stderr, "input file `%s' too big.\n", argv[2] );
return 1;
}
std::fclose( f );
f = popen( argv[1], "w" );
if( !f )
{
std::fprintf( stderr, "incorrect parameters or too many files.\n" );
return 1;
}
const int wr = std::fwrite( buffer, 1, size, f );
if( wr != size || pclose( f ) != 0 )
{
std::fprintf( stderr, "Could not run `%s' or other error.\n", argv[1] );
return 1;
}
signal( SIGPIPE, SIG_IGN );
for( int byte = 0; byte < size; ++byte )
{
std::fprintf( stderr, "byte %d\n", byte );
for( int i = 0; i < 255; ++i )
{
++buffer[byte];
f = popen( argv[1], "w" );
if( !f )
{ std::fprintf( stderr, "Can't open pipe.\n" ); return 1; }
std::fwrite( buffer, 1, size, f );
pclose( f );
}
++buffer[byte];
}
return 0;
}
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