imageWriter

#!/bin/bash
# File: imageWriter

# Example usage:
# imageWriter [image file [targetDevice]]
# ... or much easier, just run without parameters from the same directory where the EspressoBIN.img is.
# -Then insert the device and it should be detected automatically.

image="${1:-EspressoBIN.img}"
dev="${dev:-$2}"

[ "$dev" ] || {
  echo "Please insert target USB-stick or SD-card now (or unplug and re-insert)..."
  n=`ls -d /dev/*`
  while [ -z "$DEVICE" ]; do
    sleep 0.1; o="$n"; n=`ls -d /dev/*`
    DEVICES=(`diff -U0 <(echo "$o") <(echo "$n") | egrep "^\+\/dev\/(mmcblk|sd)[^\/]*\$"`)
    for DEV in ${DEVICES[@]}; do
      DEV=${DEV##*/}
      BDEV=${DEV/[0-9]*}
      echo "Found device named: $DEV (block device $BDEV)"
      printf "Write image to this device ? [y/N/c] "
      key=; while [[ "$key" != [YyNnCc] ]]; do read -n 1 key; printf "\b \b"; done
      case $key in
      [Yy]) echo "Yes"; DEVICE="$DEV"; BLKDEVICE="$BDEV"; break ;;
      [Nn]) echo "No" ;;
      [Cc]) echo "Cancel"; exit 1 ;;
      esac
    done
  done
  dev="/dev/$DEVICE"
}

echo "dev=$dev"
echo "image=$image"
[ "$dev" ] && [ -f "$image" ] && echo "Writing image..." && sudo cp "$image" "$dev"