Re: unmounting filesystems

[Roland McGrath]

> With all this talk about unmounting cds and the like, I wonder, does
> the filesystem protocol have a way for for an underlying translator to
> request translators ontop of it to shut down?  eg, you run umount
> /cdrom, which tells the lowest level translator (libstore or
> something?) to try unmounting.  It then asks every translator that has
> open ports to it to disconnect, which they'll either do or return
> EBUSY.  (typically, passive translators would quit unless something
> else has open ports to them, and user programs would return EBUSY,
> keeping everything open)

That is what "settrans -ag" does.