Parse putty options in a bash script and launch ssh command

putty-to-ssh.sh

#!/bin/bash
# Sample command arguments supported:
# "/path/to/putty.exe" -ssh -load "anishsane-dev"  -l asane anishsane-dev
# "/path/to/putty.exe" -load "anishsane-dev"
# "/path/to/putty.exe" -local <~~~ This is not a standard putty option.
#                                  But it is allowed to pass arbitrary options
#                                  to putty binary from mtputty.

local_session=false
for ((i=1;i<=$#;i++)); do
	if [ "${!i}" = "-local" ]; then
		local_session=true
	fi
	if [ "${!i}" = "-l" ]; then
		t=$((i+1))
		user=${!t}
	fi
	if [ "${!i}" = "-load" ]; then
		t=$((i+1))
		putty_session=${!t}
	fi
done
if $local_session; then
	cd
	bash
else
	((i--))
	user_host=${!i}

	RemoteCommand=$(reg query 'HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions\'"$putty_session" /v RemoteCommand | awk '/RemoteCommand/{$1=$2=""; print substr($0,3);}')
	HostName=$(reg query 'HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions\'"$putty_session" /v HostName | awk '/HostName/{$1=$2=""; print substr($0,3);}')
	UserName=$(reg query 'HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions\'"$putty_session" /v UserName | awk '/UserName/{$1=$2=""; print substr($0,3);}')

	if [ -z "$user_host" ]; then user_host=$HostName; fi
	if [ -z "$user" ]; then user=$UserName; fi

	if [ "${user_host#*@}" = "$user_host" ]; then
		user_host="$user@$user_host"
	fi
	ssh -X -t "$user_host" $RemoteCommand
fi
echo
echo
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