su

#!/QOpenSys/usr/bin/sh

#
# NOTE: to 'su' without a password, run su-setup first
#

usage() {
	echo "Usage:" $(basename $0) "<username>" "<options>"
	exit 5
}

if [ "$1" == "" ] ; then
	usage
fi
SSH_OPTS="-Y"
if [ "$DISPLAY" == "" ] ; then
	SSH_OPTS="-x"
fi

#Input 
RMT_USER=$1
RMT_DIR=$(pwd)
RMT_SHELL='$SHELL'
RMT_CMD=""
RMT_SHELL_ENVARGS=""


shift
while [ "$1" != "" ]; do
    PARAM=`echo $1 | awk -F= '{print $1}'`
    VALUE=`echo $1 | awk -F= '{print $2}'`
    case $PARAM in
        -h | --help)
            usage
            ;;
        --command|--session-command)
            RMT_CMD=$VALUE
            ;;
        -c) 
        	shift
        	RMT_CMD=$1
        	if [ "$1" == "" ]; then
        		usage
        	fi
        	;;
        --shell)
            RMT_SHELL=$VALUE
            ;;
        --fast|-f)
            RMT_SHELL_OPTS="$RMT_SHELL_OPTS -f"
            ;;
        -s) 
        	shift
        	RMT_SHELL=$1
        	if [ "$1" == "" ]; then
        		usage
        	fi
        	;;
        -m|-p|--preserve-environment)
        	RMT_SHELL_ENVARGS=$(env | grep -Ev '^(USER|HOME|LOGNAME|SHELL)' | awk '{printf "export \"%s\" && ",$1; }')
        	;;
        --group|-g|-G|--supp-group)
        	>&2 echo "ERROR: Option $PARAM not supported"
        	exit 7
        	;;
   		-|-l|--login) 
        	>&2 echo "WARNING: Option $PARAM not fully supported (always a login shell; this option causes a change to the target user's home directory)"
        	RMT_DIR=""
        	;;
      	--version|-V)
      		echo "Jesse's Poor-Man su, version 1"
      		exit 2
      		;;
        *)
            echo "ERROR: unknown parameter \"$PARAM\""
            usage
            exit 1
            ;;
    esac
    shift
done



if [ "$RMT_CMD" == "" ] ; then
	if [ "$RMT_SHELL_ENVARGS" == "" ] ; then
		RMT_CMD="cd $RMT_DIR && exec $RMT_SHELL "
	else
		RMT_CMD="cd $RMT_DIR && exec $RMT_SHELL -c '$RMT_SHELL_ENVARGS exec $RMT_SHELL' "
	fi
else
	RMT_CMD="cd $RMT_DIR && exec $RMT_SHELL -c '$RMT_SHELL_ENVARGS $RMT_CMD' "
fi



#echo $RMT_CMD
exec /QOpenSys/usr/bin/ssh -q -t $SSH_OPTS $RMT_USER@127.0.0.1  $RMT_CMD