Testing a Current Process

Asked Feb 04 '15 at 00:28

Active Feb 04 '15 at 00:35

Viewed 698 times

I'm creating a program that plays a video when a GPIO button is pressed and once the selected video ends and closes I want to play a filler video while no button is pressed. To do this, I was wondering how one would check if a certain program is running programmatically?

import RPi.GPIO as gpio
import time, sys, os

gpio.setmode(gpio.BCM)
gpio.setup(23, gpio.IN)
gpio.setup(25, gpio.IN)

os.system('pkill omxplayer')
os.system('omxplayer -b Shopping.mp4 &')

while True:
    if gpio.input(23):
        os.system('pkill omxplayer')
        os.system('omxplayer -b Shopping.mp4 &')

    if gpio.input(25):
        os.system('pkill omxplayer')
        os.system('omxplayer -b Dodgeball.mp4 &')

    # if omxplayer is not running, then run the filler video

edited Feb 04 '15 at 00:35

Bonifacio2

3,405
6
34
54

asked Feb 04 '15 at 00:28

Malik Brahimi

16,341
7
39
70

[Linux/Unix command to determine if process is running?](http://stackoverflow.com/q/9117507/846892) – Ashwini Chaudhary Feb 04 '15 at 00:31
Yes, I already know about `ps` but how do I actually check in python? – Malik Brahimi Feb 04 '15 at 00:34
Run it using [`subprocess.call`](https://docs.python.org/2/library/subprocess.html#subprocess.call) and check the return code, if it's 0 then process is running. – Ashwini Chaudhary Feb 04 '15 at 00:37
Can I do the same with `os.system` or not? – Malik Brahimi Feb 04 '15 at 00:39
Of course, but re-read `os.system` in documentation which recommends using `subprocess`. – Ashwini Chaudhary Feb 04 '15 at 00:43

Testing a Current Process

0 Answers0