#!/usr/bin/python
import multiprocessing
import hal
import time

def run_process():
    ## kind of a silly thing for now, just run sleep
    c['program-is-running'] = False
    time.sleep(2)
    # print("subprocess done sleeping")

if __name__ == '__main__':
    c = hal.component("execute_process")
    c.newpin("exec_activate", hal.HAL_BIT, hal.HAL_IN)
    c.newpin("program-is-running", hal.HAL_BIT, hal.HAL_OUT)
    c.ready()

    c['program-is-running'] = True

    try:
        while 1:
            c['program-is-running'] = True
            # time.sleep(1) is this needed?
            input = c['exec_activate']
            if input == True:
                time.sleep(.2) # debounce
                foo = multiprocessing.Process(name='daemon', target=run_process)
                foo.start()
            # keep checking whether the subprocess is done, doing something each
            # time.  else you could just wait()
                while ( foo.is_alive() ):
                    # print("foo appears to still be running ...")
                # the subprocess has finished...
                    time.sleep(.01)

    except KeyboardInterrupt:
        raise SystemExit