[OpenAFS] dropbox semantics ("irl")

[Jim Rees]

It's in Check_PermissionRights():

    if (CallingRoutine & CHK_FETCH) {
		/* must have read access, or be owner and have insert access */
		if (!(rights & PRSFS_READ)
		    && !(OWNSp(client, targetptr) && (rights & PRSFS_INSERT)))
		    return (EACCES);

...

    } else {			/* a store operation */
	if ((rights & PRSFS_INSERT) && OWNSp(client, targetptr)
	    && (CallingRoutine != CHK_STOREACL)
	    && (targetptr->disk.type == vFile)) {
	    /* bypass protection checks on first store after a create
	     * for the creator; also prevent chowns during this time
	     * unless you are a system administrator */
	  /******  InStatus->Owner && UnixModeBits better be SET!! */

I haven't read the code but the comment implies that only the first store
will succeed (and we know that comments always exactly reflect the code)