O_NONBLOCK for devices with removable media

[Bernd Walter]

On Mon, Aug 01, 2005 at 09:41:30PM +0300, victor cruceru wrote:
> Well, if you are doing this from a daemon (multiplexing a lot of events) 
> which is blocked in this open syscall, even 1 second is not reasonable. In 
> my case it is something more than 30 of seconds (again, on a 5.4 box). I'll 
> give it a try on FreeBSD 6. I'm currently investigating if there is 
> something like TEST_UNIT_READY (for both ATAPI and SCSI) which can be issued 
> on a control device (i.e. /dev/ata)

What do you expect it to do?
Ask the device about the state or always fail, because it is not
allowed to ask the device?
In your case you have a broken device, this isn't much of an argument.
A resonable reply time for a USB device would be less then 10ms.

-- 
B.Walter                   BWCT                http://www.bwct.de
bernd at bwct.de                                  info at bwct.de