volt

#!/bin/zsh

# VOLume Toggle => volt
#
# Usage: volt <volume>
#   This script toggles the mountedness of the specified OS X disk 
# volume using diskutil.  The volume may be specified as the first 
# parameter, or as the name of a symlink to this script.

volume=${1:=${0:t}}

mount | grep -q "/Volumes/${volume} *("

if [[ $? -eq 0 ]]; then
  # Volume is mounted; eject it
	diskutil eject $volume
else
  # Volume is unmounted; mount it
	diskutil mount $volume
fi