#!/bin/bash
#Gets corresponding disk for specified partition device
#Usage: getdisk.sh /dev/sda1

DEV=$1

#name of sysfs directory for this device
SYS=`echo $DEV | sed 's@/dev/@@' | sed 's@/@!@'`

#find corresponding disk in sysfs
SYSDISC=`echo /sys/block/*/$SYS/dev|head -n 1`

#convert to device
DEVDISC=`
    echo $SYSDISC |
    sed s@/sys/block/@@ |
    sed s@/.*/.*@@ |
    sed s@!@/@
`

if [ "$DEVDISC" != "*" ]; then
    echo /dev/$DEVDISC
    exit 0
else
    exit 1
fi