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#!/bin/bash
#
# mount-media
#

# Parameters
MEDIA="$1"
VOLUME="$2"
BASENAME="`basename $0`"
MOUNTPOINT="/media/usb"

# Check media config
if [ -z "$MEDIA" ]; then
  echo "usage: $BASENAME <media> [volume]"
  echo "example: $BASENAME mymedia sdb1"
  exit 1
fi

# Check volume config
if [ -z "$VOLUME" ]; then
  VOLUME="sdb1"
fi

DISK="`echo ${VOLUME} | sed -e s/[0-9]\$//g`"

# Set sudo config
if [ "`whoami`" != 'root' ]; then
  sudo="sudo"
fi

if [ "$BASENAME" == "mount-media" ]; then
  echo "Disabling STANDBY on drive..."
  $sudo sdparm --clear STANDBY -6 /dev/$DISK
  echo "Initializing crypto layer..."
  $sudo cryptsetup luksOpen /dev/$VOLUME $MEDIA && \
  echo "Checking filesystem..."
  $sudo fsck -v -y /dev/mapper/$MEDIA && \
  echo "Mounting volume at $MOUNTPOINT"
  $sudo mount /dev/mapper/$MEDIA $MOUNTPOINT"
elif [ "$BASENAME" == "umount-media" ]; then
  $sudo umount /media/usb && \
  $sudo cryptsetup luksClose $MEDIA
fi