Messages in this thread | | | Date | Wed, 25 Mar 1998 03:38:49 +0000 | From | Brian Gerst <> | Subject | Re: Notification to user-space upon CD eject button being pressed? |
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James Mastros wrote: > > On Wed, 25 Mar 1998, David Woodhouse wrote: > > Is it possible for a user-space program to receive notification when the eject > > button is pressed on a CD drive? > > > > It would be useful for automountd to automatically unmount and eject CDs when > > the eject button is pressed. > With IDE CDs, anyway, it isn't possible for us to do this -- the drive > doesn't tell us. We can have the drive be locked or unlocked, but in > unlocked position, it ejects before telling us anything, and in locked > position, it doesn't tell us when the button is pressed. > > We could poll the drive for a change (which is what win95 does, AFAIK), > but that is VERY inefficient.
Why not make it an ioctl command and let the userspace daemon poll (like say every few seconds). Do SCSI devices send a message when the eject button is pressed?
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Brian Gerst
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