O_EXCL            366 src/dps8/safemove.h   dfd = open (dst, O_WRONLY | O_CREAT | O_EXCL, 0600);
O_EXCL            166 src/dps8/utfile.c     int fd = open(pattern, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR);