Method Temporary

util/system/file.cpp:1338–1341

}

TFile TFile::Temporary(const TString& prefix) {
    // TODO - handle impossible case of name collision
    return TFile(prefix + ToString(MicroSeconds()) + "-" + ToString(RandomNumber<ui64>()), CreateNew | RdWr | Seq | Temp | Transient);
}

TFile TFile::ForAppend(const TString& path) {
    return TFile(path, OpenAlways | WrOnly | Seq | ::ForAppend);