if ((fildes = open (uugen_fnbuffer,
                      O_WRONLY | O_CREAT | O_BINARY | O_TRUNC,
                      (uu_ignmode)?0666:thefile->mode)) == -1) {
    progress.action = 0;
    UUMessage (uulib_id, __LINE__, UUMSG_ERROR,
	       uustring (S_NOT_OPEN_TARGET),
	       uugen_fnbuffer, strerror (uu_errno = errno));
    fclose (source);
    return UURET_IOERR;
  }

/* note that O_BINARY is 0 on the OSX platform and the other args are verified to be ok as well */

/* errno is EINVAL in the UUMessage call above when UTF-8 filename contains funky accented chars.. */