# usage: (where "foobar" will possibly match your desired window manager)
# ~$  startx foobar
# ~$ xinit foobar -- :1
# ~$ xinit -- :$(tty | tr -d /dev/tty)
# now with simple dbus detection 
# allocate to your default window manager
DEFAULT_SESSION=openbox-session

# dbus executable ?

if [ -x dbus-launch ];then
    DESKTOP_BUS="dbus-launch --exit-with-session"
else
    DESKTOP_BUS=""
fi

if [ -z $1 ];
then
    # no option for xinit then just jump to default
    exec $DESKTOP_BUS $DEFAULT_SESSION
elif [ -x $1 ];
then
    # $1 in our PATH and executable  
      case $1 in
        fluxbox )
            
            # see also: ~/.fluxbox/startup
            exec $DESKTOP_BUS startfluxbox
            ;;
        openbox )
            
            # see also: ~/.config/openbox/autostart
            exec openbox-session
            ;;
        twm)
            # it is OK to not have xbindkeys
            xbindkeys || true  &
            xterm -e /bin/bash &
            exec twm
            ;;
        icewm)
            icewmbg &
            icewmtray &
            exec $DESKTOP_BUS icewm
            ;;
        wmaker)
            exec wmaker
            ;;
        blackbox)
            exec blackbox
            ;;
        *)
            # we should not arrive here unless we fed $1 with a shell or something
            # but I'm just gunna pretend we never did and go default
            # 
            exec $DESKTOP_BUS $DEFAULT_SESSION

            ;;
      esac

elif [ ! -x $1 ];
then
# spit some help in the middle of all those Xorg messages
    echo ""
    echo Please Note: Unable to understand: $1
    echo Try xinit  or startx with no options for $DEFAULT_SESSION
    echo "or if server in use try:  xinit -- :$(tty | tr -d /dev/tty)"
    echo Or try:  startx $1   finally try:  startx sh
else
    # we have to hope $1 is some argument an xterm or xinit understands
    xterm -e $1 || xterm &
    # this is a guess and seems a little safer than nothing
    exec $DEFAULT_SESSION 
fi

### this should never do a thing but the use cases are vast and interesting
### as this sourced thing should have been abandoned  by exec millisecs ago

if [ "$?" != "0" ]; then
    echo -e "\ntry:\t xinit -- :$(tty | tr -d /dev/tty)"
    echo -e "or plain  startx "
fi

#eof

exec dbus-launch --exit-with-session openbox-session

exec openbox-session

# save to ~/.xinitrc  and or ~/.xsession
# ~$ man startx   for more information about why and what
# this file was originally from the sources of *slim display manager*
# edit to taste 
# usage: (where "foobar" will match your desired window manager)
# ~$  startx foobar
# ~$ xinit foo -- :1
# allocate to your default preference
# here 
DEFAULT_SESSION=openbox-session

case $1 in
    openb* | ob | foo)
    # see also: ~/.config/openbox/autostart 
        exec openbox-session
        ;;
    twm)
        # it is OK to not have xbindkeys
        xbindkeys || true  &
        xterm &
        exec twm
        ;;
     # examples 
    enlightenment)
        exec /usr/bin/enlightenment_start
        ;;
    enlightenment?*)
        exec /usr/local/bin/enlightenment_start
        ;;
    icewm)
        icewmbg &
        icewmtray &
        exec icewm
        ;;
    wmaker)
        exec wmaker
        ;;
    blackbox)
        exec blackbox
        ;;
    *)
        exec $DEFAULT_SESSION
        ;;
esac