mountpoint command for OSX

mountpoint.sh

# OSX doesn't have a mountpoint command, or concise way to get that info
# this is a replacement for the mountpoint command, with the exception that it returns 2 instead of 1 for no argument

function mountpoint() {

	# require a path
	if [[ -z "$1" ]]; then
		echo 'mountpoint requires a path as an argument';
		echo 'ex. `mountpoint /mnt/some_disk`';
		return 2;
	fi;

	# drop the trailing slash (unless it is root path)
	check_path="$(realpath "$1")";

	# loop through `mount` output and compare to each mountpoint
	while read -r line; do
		mount_path="$(echo "$line" | sed -n -e 's/\(.*on \)\(.*\)\( (.*\)/\2/p')";
		if [ "$mount_path" = "$check_path" ]; then
			echo "$check_path"' is mountpoint';
			return 0;
		fi;
	done <<< "$(mount)";
	
	echo "$check_path"' is not a mountpoint';
	return 1;
}