mapping from scsi Host/Chan/Id/Lun to /dev/foo

mapping from scsi Host/Chan/Id/Lun to /dev/foo

[Jeff Meininger]

I'm trying to write a userspace program that takes Host/Chan/Id/Lun
arguments for some sort of scsi storage device and prints out the
corresponding /dev entry, if one exists.

This is easy to do with devfs... assuming SCSI 0 0 0 0, the program can 
simply look in /dev/scsi/host0/bus0/target0/lun0/ for 'cd' or 'disc', etc.

Without devfs, though, I can't figure out how to map 0 0 0 0 to /dev/scd0,
/dev/sr0, or /dev/sda, etc.

I hope I haven't missed anything obvious in the ioctl commands in the .h 
files, /proc, etc...

I'm not subscribed to LKML, so I would appreciate it if you'd Cc me in 
your reply!

Thanks!
-Jeff Meininer

Re: mapping from scsi Host/Chan/Id/Lun to /dev/foo

[Erik Andersen]

On Sat May 11, 2002 at 04:23:03PM -0500, Jeff Meininger wrote:
> 
> I'm trying to write a userspace program that takes Host/Chan/Id/Lun
> arguments for some sort of scsi storage device and prints out the
> corresponding /dev entry, if one exists.

Grab a copy of sg3-utils and read show_devices() in sginfo.c

 -Erik

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Erik B. Andersen             http://codepoet-consulting.com/
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