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* scsi-devfs.sh
@ 2004-01-08  7:35 Remco
  2004-01-08 10:30 ` scsi-devfs.sh Kay Sievers
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Remco @ 2004-01-08  7:35 UTC (permalink / raw)
  To: linux-hotplug

Analogous to the 'ide-devfs.sh' script, I created a 'scsi-devfs.sh' CALLOUT script. 
I tried to make it useful for any SCSI device. (using names taken from the Linux SCSCI 2.4 howto,
so if there were any major changes in 2.6 they are not reflected in the script)
Since I only own one external USB drive that's all I could test it with, so other devices have not been tested. 

Main reason for having this script is not necessarily being devfs compliant, 
but for not having all device nodes in one flat directory structure. 

If anyone is interrested, feel free to grab it.


scsi-devfs.sh:

#!/bin/sh

# udev CALLOUT script
# return devfs-like-names for scsi-devices
# CALLOUT, BUS="scsi", PROGRAM="/etc/udev/scsi-devfs.sh %k %b %n", ID="[nst*]", NAME="%1c", SYMLINK="%2c"
# CALLOUT, BUS="scsi", PROGRAM="/etc/udev/scsi-devfs.sh %k %b %n", ID="[scd*]", NAME="%1c", SYMLINK="%2c"
# CALLOUT, BUS="scsi", PROGRAM="/etc/udev/scsi-devfs.sh %k %b %n", ID="s[dgrt]*", NAME="%1c", SYMLINK="%2c"

SCSI_ID=$2	# format is straight forward "n1:n2:n3:n4" => "HOST:BUS:TARGET:LUN"
# Get host id (n1)
HOST=${SCSI_ID%%\:*}; 
# Shift to the next id (n2) and discard n1
SCSI_ID=${SCSI_ID#*\:}; 
# Get the bus id
BUS=${SCSI_ID%%\:*}; 
# Shift to the next id (n3) and discard n2
SCSI_ID=${SCSI_ID#*\:}; 
# Get target id
TARGET=${SCSI_ID%%\:*}; 
# Shift to the next id (n4) and discard n3
SCSI_ID=${SCSI_ID#*\:}; 
# Get lun id
LUN=$SCSI_ID; 

# Determine medium name and type 
# Kernel device name/type combinations were extracted from "The Linux 2.4 SCSI subsystem HOWTO"
if [ -z "$3" ]; then
	case "$1" in
	scd* | sr*)
		# CDROM
		DEVICE=scsi/host$HOST/bus$BUS/target$TARGET/lun$LUN/cd
		;;
	sd*)
		# Hard disc
		DEVICE=scsi/host$HOST/bus$BUS/target$TARGET/lun$LUN/disc
		;;
	nst*)
		# Tape without rewind
		DEVICE=scsi/host$HOST/bus$BUS/target$TARGET/lun$LUN/mtan
		;;
	st*)
		# Tape with rewind
		DEVICE=scsi/host$HOST/bus$BUS/target$TARGET/lun$LUN/mt
		;;
	sg* | *)
		# Generic / all left-overs
		DEVICE=scsi/host$HOST/bus$BUS/target$TARGET/lun$LUN/generic
		;;
	esac
else
	# Partitions
	DEVICE=scsi/host$HOST/bus$BUS/target$TARGET/lun$LUN/part$3
fi
# Return DEVICE to udev
echo $1 $DEVICE

exit 0



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^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2004-01-08 11:18 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2004-01-08  7:35 scsi-devfs.sh Remco
2004-01-08 10:30 ` scsi-devfs.sh Kay Sievers
2004-01-08 10:51 ` scsi-devfs.sh Remco
2004-01-08 11:18 ` scsi-devfs.sh Kay Sievers

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