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73 lines
1.6 KiB
73 lines
1.6 KiB
#!/bin/bash
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#
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# scsi-devfs.sh: udev external PROGRAM script
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#
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# Copyright 2004 Richard Gooch <rgooch@atnf.csiro.au>
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# Copyright 2004 Fujitsu Ltd.
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# Distributed under the GNU Copyleft version 2.0.
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#
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# return devfs-names for scsi-devices
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# Usage in udev.rules:
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# BUS="scsi", PROGRAM="/lib/udev/scsi-devfs.sh %k %b %n", NAME="%c{1}", SYMLINK="%c{2} %k"
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# Find out where sysfs is mounted. Exit if not available
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sysfs=`grep -F sysfs /proc/mounts | awk '{print $2}'`
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if [ "$sysfs" = "" ]; then
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echo "sysfs is required"
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exit 1
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fi
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cd $sysfs/bus/scsi/devices
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case "$1" in
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sd*)
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# Extract partition component
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if [ "$3" = "" ]; then
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lpart="disc"
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spart=""
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else
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lpart="part$3"
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spart="p$3"
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fi
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;;
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sr*)
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lpart="cdrom"
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spart=""
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;;
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st*)
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# Not supported yet
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exit 1
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;;
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sg*)
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lpart="generic"
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spart=""
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;;
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*)
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exit 1
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;;
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esac
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# Extract SCSI logical address components
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scsi_host=`echo $2 | cut -f 1 -d:`
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scsi_bus=`echo $2 | cut -f 2 -d:`
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scsi_target=`echo $2 | cut -f 3 -d:`
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scsi_lun=`echo $2 | cut -f 4 -d:`
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# Generate common and logical names
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l_com="bus$scsi_bus/target$scsi_target/lun$scsi_lun/$lpart"
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l_log="scsi/host$scsi_host/$l_com"
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if [ -d /dev/discs ] ; then
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for x in /dev/discs/disc* ; do
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if readlink `ls -d $x/* | awk '{print $0; exit;}'` | grep -q "${l_log%${lpart}}" ; then
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x=`echo $x | cut -f3 -dc` # gives the number in disc0
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break
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fi
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unset x
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done
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fi
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if [ -z "${x}" ] ; then
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x="`ls /dev/discs/ 2> /dev/null | grep -c .`"
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fi
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echo $l_log discs/disc${x}/${lpart}
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