#!/bin/bash

## Version 0.1 200311    initial version
## Version 0.2 20040225: find unmounted devices (instead of hardcoded)

## this script finds partitions of types defined in ${FILESYSTEMS}
## on local accessible mass storage medias, where no partition
## is mounted yet.
## So if your device got more than one parition and one of them is
## already mounted, this script ignores this device (in order to find
## NEW usb-sticks plugged into the system).

# where should I mount the USB-stick:
MOUNTPOINT="/mnt/usbstick"

# options for 'mount'; separated using commatas (see 'man mount')
MOUNTOPTIONS="uid=1000,gid=1000"

# get device other than /dev/scd0:
UNMOUNTEDDEVICES=`/usr/sbin/scsiinfo -l|/bin/sed 's/\/dev\/scd0//'`

# try to mount using this filesystems:
FILESYSTEMS="vfat msdos"




do_mount()
{
	#echo "DEBUG: trying to mount [$CURRENTDEVICE] on [$MOUNTPOINT] using fs-type [$CURRENTFS]"
	/bin/mount -o "$MOUNTOPTIONS" -t "$CURRENTFS" "$CURRENTDEVICE" "$MOUNTPOINT" 2>/dev/null
}


handle_mount_success_and_exit()
{
	echo "success while mounting [$CURRENTDEVICE] on [$MOUNTPOINT] using fs-type [$CURRENTFS]"
	exit
}


handle_mount_failure()
{
	echo "ERROR: could not mount [$DEVICE] on [$MOUNTPOINT]. Tried to use filesystems [$FILESYSTEMS]."
	exit
}


handle_no_device_found()
{
	echo "WARNING: handle_no_device_found called; falling back to \"/dev/sda\""
	DEVICE=/dev/sda
}


loop_mounting()
{
  for CURRENTFS in $FILESYSTEMS ; do
  	do_mount "$CURRENTDEVICE" "$CURRENTFS" && handle_mount_success_and_exit "$CURRENTDEVICE" "$CURRENTFS"
  done
}


loop_devices()
{
  for CURRENTMAINDEVICE in $UNMOUNTEDDEVICES ; do

    #echo "DEBUG: DEVICE: ["$CURRENTMAINDEVICE"]"
    
    CURRENTDEVICE="$CURRENTMAINDEVICE"
    loop_mounting
    CURRENTDEVICE="$CURRENTMAINDEVICE"1
    loop_mounting
    CURRENTDEVICE="$CURRENTMAINDEVICE"0
    loop_mounting
    CURRENTDEVICE="$CURRENTMAINDEVICE"2
    loop_mounting
  done
}

########################################################

TEMP1="TEMPmounteddevices.txt"
TEMP2="TEMPalldevices.txt"

## FIXXME: besser: cat /proc/mounts

mount|awk ' /^\/dev/ {print substr($1,1,8)}'|sort|tr " " "\n" >${TEMP1}
/usr/sbin/scsiinfo -l|sort|tr " " "\n" >${TEMP2}

## FIXXME: besser: mit comm (siehe Posting)

UNMOUNTEDDEVICES=`diff ${TEMP1} ${TEMP2}|egrep "^>"|sed 's#> ##'|tr '\n' " "`
rm ${TEMP1} ${TEMP2}

/sbin/modprobe usb-storage

[ -z "$UNMOUNTEDDEVICES" ] && handle_no_device_found

loop_devices


handle_mount_failure

/sbin/rmmod usb-storage
/sbin/rmmod msdos

#end