off_t orig_pos = lseek(iFd, 0, SEEK_CUR);
if (lseek(iFd, -4, SEEK_END) < 0)
return _error->Errno("lseek","Unable to seek to end of gzipped file");
off_t orig_pos = lseek(iFd, 0, SEEK_CUR);
if (lseek(iFd, -4, SEEK_END) < 0)
return _error->Errno("lseek","Unable to seek to end of gzipped file");