gistfile1.ps1

#/!bin/bash

VMSLIST=$(vboxmanage list vms)
VMSLISTRUNNING=$(vboxmanage list runningvms)
REGEX='\"[a-zA-Z0-9\.-]+\"'

OPT=$1

case "$OPT" in

	'--list')
		i=0
		if [[ $2 == '--running' ]]; then	
			for VM in $VMSLISTRUNNING; do
				if [[ $VM =~ $REGEX ]]; then
					echo $VM | cut -d '"' -f 2
					i=$[i+1]
				fi
			done
			if [[ $i -ne 0 ]]; then
				echo "At time, there is" $i "running vms on the server."
			else
				echo "At time, there is no running vms on the server."
			fi
		else
			for VM in $VMSLIST; do
				if [[ $VM =~ $REGEX ]]; then
					echo $VM | cut -d '"' -f 2
					i=$[i+1]
				fi
			done
			if [[ $i -ne 0 ]]; then
				echo "At time, there is $i vm on the server."
			else
				echo "At time, there is no vms on the server."
			fi
		fi;;
	
	'--start')
		if [[ $2 == '--all' ]]; then
			for VM in $VMSLIST; do
				if [[ $VM =~ $REGEX ]]; then
					VM=$(echo $VM | cut -d '"' -f 2)
					vboxmanage startvm $VM 
				fi
			done
		else
			for ARG in $@; do
				if [[ $ARG != '--start' && $VMSLIST =~ $ARG ]]; then
					vboxmanage startvm $ARG
				else
					if [[ $ARG != '--start' ]]; then
						echo "Sorry but $ARG isn't a VM."
					else 
						echo "Please specify a vm you want to start or add --all to start all vms."
					fi
				fi
			done	
		fi;;

	'--stop')
		if [[ $2 == '--all' ]]; then
			for VM in $VMSLISTRUNNING; do
				if [[ $VM =~ $REGEX ]]; then
					VM=$(echo $VM | cut -d '"' -f 2)
					vboxmanage controlvm $VM acpipowerbutton 
				fi
			done
		else
			for ARG in $@; do
				if [[ $ARG != '--stop' && $VMSLISTRUNNING =~ $ARG ]]; then
					vboxmanage controlvm $ARG acpipowerbutton 
				else
					if [[ $ARG != '--stop' ]]; then
						echo "Sorry but $ARG isn't a VM."
					else 
						echo "Please specify a vm you want to power off or add --all to power off all vms."
					fi
				fi
			done	
		fi;;

	'')
		echo >&2 "Please specify what you want to do. Please type --help to command help."
		exit 1;;
	*)
		echo >&2 "Invalid option $1."
		exit 1;;	
esac