Messages in this thread | | | Date | Tue, 26 Aug 2003 22:32:11 +0700 | From | Samphan Raruenrom <> | Subject | Re: [Rdi1] Re: [PATCH] Add MOUNT_STATUS ioctl to cdrom device |
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Christoph Hellwig wrote: > On Tue, Aug 26, 2003 at 06:30:10PM +0700, Samphan Raruenrom wrote: >>>>This doesn't make sense at all. Just try the unmount and >>>>tell the user if it failed - you can't say whether it will >>>>fail before trying. >>Yes, you can! Reading the code, if vfsmount.mnt_count > 1 then >>umount on that device will fail. > if you are doing the unmount currently and nothing changes because > you hold the nessecary locks, yes. But as soon as you drop the locks > this is void. There's no way to find out whether you can unmount > a filesystem except trying it.
_^_ I understand it now. Thank you for your patience in explaining this to me. I learn quite a lot of things in <4 hours! Thank you everyone. I'll try to make a good use of what I learn here, e.g. to write another GNOME automounter that use the new "event status notification" and also let users eject their CDs - "without polling" - possible? It must be real cool to write such daemon (polling make any hacker feel guilty).
-- Samphan Raruenrom, The Open Source Project, National Electronics and Computer Technology Center, National Science and Technology Development Agency, Thailand.
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