220     int bytesLeft;  in write_update_file()  local
232     bytesLeft = fileSize + sizeof(metadata);  in write_update_file()
233     err = dataStream->WriteEntityHeader(key, bytesLeft);  in write_update_file()
248     bytesLeft -= sizeof(metadata); // bytesLeft should == fileSize now  in write_update_file()
251     while ((amt = read(fd, buf, bufsize)) != 0 && bytesLeft > 0) {  in write_update_file()
252         bytesLeft -= amt;  in write_update_file()
253         if (bytesLeft < 0) {  in write_update_file()
254             amt += bytesLeft; // Plus a negative is minus.  Don't write more than we promised.  in write_update_file()
262     if (bytesLeft != 0) {  in write_update_file()
263         if (bytesLeft > 0) {  in write_update_file()
267             while (bytesLeft > 0) {  in write_update_file()
268                 amt = bytesLeft < bufsize ? bytesLeft : bufsize;  in write_update_file()
269                 bytesLeft -= amt;  in write_update_file()
278                 " You aren't doing proper locking!", realFilename, fileSize, fileSize-bytesLeft);  in write_update_file()