+ APT_HIDDEN bool OpenInternDescriptor(unsigned int const Mode, APT::Configuration::Compressor const &compressor);
+
+ // private helpers to set Fail flag and call _error->Error
+ APT_HIDDEN bool FileFdErrno(const char* Function, const char* Description,...) APT_PRINTF(3) APT_COLD;
+ APT_HIDDEN bool FileFdError(const char* Description,...) APT_PRINTF(2) APT_COLD;