umass to /dev/da* mapping
jmc-freebsd2 at milibyte.co.uk
Mon Dec 5 17:08:20 UTC 2011
I have a fairly simple perl script which is run by devd when I plug in a
USB memory stick. The script sets up some permissions and a link to
make life easy for a user to mount the memory stick.
This normally works fine but there are problems if the memory stick is
already inserted before booting.
Normally my internal 4 slot memory card reader is detected as umass0
with devices da[0-3] and when the USB memory stick is inserted it comes
up as umass1 with device da4 and my script works on that assumption. If
the USB stick is present on booting then it appears as da0 on umass0
and the card reader is da[1-4] on umass1 so the script fails.
Is there any convenient way for my script to determine which da* devices
correspond to the umass device name?
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