CopyFile
status_t CopyFile(BFile& dest, BFile& src);
status_t err = CopyFile(newFile, oldFile);
CopyFile(&entry, &statbuf, &newDir, loopControl, 0, false, undo);
CopyFile(entry, &statbuf, destDir, loopControl, loc,
CopyFile(srcFile, srcStat, destDir, loopControl, loc,