USB/desktop integration - how to guess /dev/sd* when hotplugging?

[Michael Hamilton <michael@actrix.gen.nz>]

How do I systematically determine /dev/sd[abc] when hotplugging?
Is sg_map from sg3_utils the best/only way?  In more detail...

I've got some scripts that attempt to integrate hotplug and 
the desktop so that icons for each partition pop onto the 
desktop and change state when usb devices are plugged in,
see http:/users.actrix.co.nz/michael .  My scripts were 
an interim measure - pending a universally accepted 
solution from distro or desktop makers - but my scripts
are still in use after  more than a year. I'm trying 
to tidy them up and add firewire support, plus get them
to work for kernel 2.6.

There doesn't seem to be an easy way to figure out the scsi
/dev/sd* from the hotplug device passed in, for example:
from /proc/bus/usb/004/002 to what /dev/sd*?

I was hoping there was a easy way to use /proc or /sys, to 
get this info.  But I can't see anything there solving the
problem.  I'm thinking of using the sg_map utility from 
sg3_utils.  The only problem with sg_map is that it probes
non-existant devices, and the probes produce a lot of 
dmesg chatter which in turn creates a CPU burst from the
syslogd.  Some log chatter can be eliminated by assigning
dummy devices, but I prefer not to have to do that.

If there isn't a way to do this simply and cleanly, could
I suggest that kernel people consider adding something
to the sysfs under 2.6.   

Thanks,
Michael


-------------------------------------------------------
SF.Net is sponsored by: Speed Start Your Linux Apps Now.
Build and deploy apps & Web services for Linux with
a free DVD software kit from IBM. Click Now!
http://ads.osdn.com/?ad_id\x1356&alloc_id438&op=click
_______________________________________________
Linux-hotplug-devel mailing list  http://linux-hotplug.sourceforge.net
Linux-hotplug-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel