File: scsi-re-add

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#!/bin/sh -e
# re-detect the capacity of USB devices after they have been powered off an on

[ "$DEVPATH" ] || exit 1

device=${DEVPATH##*/}
ctrl=${device%%:*}
bus=${device#*:}; bus=${bus%%:*}
target=${device#*:*:}; target=${target%%:*}
lun=${device#*:*:*:}
DEV_ID="$ctrl $bus $target $lun"

case "$ctrl$bus$target$lun" in
    *[A-Za-z_.:-]*)
    echo "Invalid \$DEVPATH!" >&2
    exit 1
    ;;
esac

# controller, bus, target, lun
echo "scsi remove-single-device $DEV_ID" > /proc/scsi/scsi
echo "scsi add-single-device $DEV_ID"    > /proc/scsi/scsi

exit 0