Hello ,

I am very new in boost file system and simply I wrote a sample to use boost file system. I need a file descriptor for both read and write. When I implement below code for "sink" and "source" files, they work. But I don't understand why I couldn't open a basic_file object to read and write. Any comment is appreciated. Thanks in advance.

void test_boost2(){

long long size=5*1024*1024;

char buffer [L_tmpnam];

const char* prefix = "c1t";

string tempPath(archive::tmpdir());

filesystem::path path(tempPath);

filesystem::space_info spi(space(path));

strcpy(buffer,prefix);

if( spi.free > size * 3/2 && tmpnam (buffer+sizeof(prefix)-1) != NULL){

buffer[sizeof(prefix)-1]='_';

path/=buffer;

boost::iostreams::basic_file<char> *tmpFile= new basic_file<char>(path.string());

tmpFile->open(path.string());

if(tmpFile->is_open()){

long long p=size-DATA_SIZE-2;

tmpFile->seek(p,ios_base::beg);

tmpFile->close();

}

delete tmpFile;

}