#!/bin/sh
# Umount USB Flash drive
# BSD License. Copyright (C) by Rashid N. "CityCat" Achilov
# $Id: umflash,v 1.1.1.1 2008/01/20 21:10:58 shelton Exp $

if [ $# -eq 0 ]; then
  mpoint="/mnt/umass"
 else
   mpoint=$1
fi

# Check on user id. Only root allow to umount flash
myid=`id -u`

if [ $myid -ne 0 ]; then
  echo Only root can umount flashdrives
  exit
fi

# Memorize device, mounted into this mount point
mpdev=`mount | grep -e "$mpoint " | awk '{print substr($1,6,3)}'`

# Do umount
umount $mpoint

# Do search installed device and take info
umdrive=`camcontrol devlist | grep -e "($mpdev"`

# When we couldn't search drive, try to find ",da" (device number as second arg)
if [ ${#umdrive} -eq 0 ]; then
  umdrive=`camcontrol devlist | grep -e ",$mpdev"`
fi

# Search bus (search "scbusX", than select X from string)
umbus=`echo $umdrive | awk '{print substr($0,index($0,"scbus"),6)}'`
umdig=`echo $umbus | awk '{print substr($1,6)}'`

# Similar way search target
umtarget=`echo $umdrive | awk '{print substr($0,index($0,"target") + 7,1)}'`
umlun=`echo $umdrive | awk '{print substr($0,index($0,"lun") + 4,1)}'`

camcontrol eject $umdig:$umtarget:$umlun