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#!/bin/sh
# Skript to rescan SCSI bus, using the
# scsi add-single-device mechanism
# (w) 98/03/19 Kurt Garloff <kurt@garloff.de> (c) GNU GPL
# This script is useful for automatically scanning for new
# USB and IEEE1394 devices which will not show up automatically
# if they use a LUN (logical unit number) other than 0.
# To search all LUNS for new devices to enable, run like this:
#
# rescan-scsi-bus -l
found=0
rmvd=0
# Return hosts. /proc/scsi/HOSTADAPTER/? must exist
findhosts() {
hosts=
for name in /proc/scsi/*/?; do
name=${name#/proc/scsi/}
if test ! $name = scsi ; then
hosts="$hosts ${name#*/}"
echo "Host adapter ${name#*/} (${name%/*}) found."
fi
done
}
# Test if SCSI device $host $channen $id $lun exists
# Outputs description from /proc/scsi/scsi, returns new
testexist() {
grepstr="scsi$host Channel: 0$channel Id: 0*$id Lun: 0$lun"
new=`cat /proc/scsi/scsi | grep -e "$grepstr"`
if test ! -z "$new" ; then
cat /proc/scsi/scsi | grep -e "$grepstr"
cat /proc/scsi/scsi | grep -A2 -e "$grepstr" | tail -n 2
fi
}
# Perform search (scan $host)
dosearch() {
for channel in $channelsearch; do
for id in $idsearch; do
for lun in $lunsearch; do
new=
devnr="$host $channel $id $lun"
echo "Scanning for device $devnr ..."
printf "OLD: "
testexist
if test ! -z "$remove" -a ! -z "$new" ; then
echo "scsi remove-single-device $devnr" > /proc/scsi/scsi
echo "scsi add-single-device $devnr" > /proc/scsi/scsi
printf "\r\x1b[A\x1b[A\x1b[AOLD: "
testexist
if test -z "$new"; then
printf "\rDEL: \r\n\n\n\n"
rmvd=$(($rmvd+1))
fi
fi
if test -z "$new" ; then
printf "\rNEW: "
echo "scsi add-single-device $devnr" > /proc/scsi/scsi
testexist
if test -z "$new"; then
printf "\r\x1b[A"
else
found=$(($found+1))
fi
fi
done
done
done
}
# main
if test @$1 = @--help -o @$1 = @-h ; then
echo "Usage: rescan-scsi-bus.sh [-l] [-w] [-c] [host [host ...]]"
echo " -l activates scanning for LUNs 0 .. 7 [default: 0]"
echo " -w enables scanning for device IDs 0 .. 15 [def.: 0 .. 7]"
echo " -r enables removing of devices [default: disabled]"
echo " -c enables scanning of channels 0 1 [default: 0]"
echo " If hosts are given, only these are scanned [default: all]"
exit 0
fi
# defaults
lunsearch="0"
idsearch="0 1 2 3 4 5 6 7"
channelsearch="0"
remove=""
# Scan options
opt="$1"
while test ! -z "$opt" -a -z "${opt##-*}"; do
opt=${opt#-}
case "$opt" in
l) lunsearch="0 1 2 3 4 5 6 7" ;;
w) idsearch="0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15" ;;
c) channelsearch="0 1" ;;
r) remove=1 ;;
*) echo "Unknown option -$opt !" ;;
esac
shift
opt="$1"
done
# Hosts given ?
if test @$1 = @; then
findhosts
else
hosts=$*
fi
for host in $hosts; do
dosearch
done
echo "$found new device(s) found. "
echo "$rmvd device(s) removed. "
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