.

[fov95]

.

[bakkeby]

Yes this is pretty straightforward.

In config.h you have

static IPCCommand ipccommands[] = {
...
    IPCCOMMAND( quit, 1, {ARG_TYPE_NONE} ),
...
};

so that you can run this to exit dwm:

$ dwm-msg run_command quit

You'll need to change this to:

    IPCCOMMAND( quit, 1, {ARG_TYPE_SINT} ),

then you can run

$ dwm-msg run_command quit 0 # to quit
$ dwm-msg run_command quit 1 # to restart

but

$ dwm-msg run_command quit # will fail as dwm-msg expects an argument