FILE *checksums = fdopen(checksum_file->get_fd(), "w");
std::set<string> segment_list = db->GetUsedSegments();
for (std::set<string>::iterator i = segment_list.begin();
i != segment_list.end(); ++i) {
string seg_path, seg_csum;
FILE *checksums = fdopen(checksum_file->get_fd(), "w");
std::set<string> segment_list = db->GetUsedSegments();
for (std::set<string>::iterator i = segment_list.begin();
i != segment_list.end(); ++i) {
string seg_path, seg_csum;