Using Process.runShellCommand to start Python Program

Hardware Arduino Yún
1

Hi all --
I'm trying to start a python program on the Linino from the Arduino. This is what I've got:

Arduino Code

#include <Process.h>

void setup() {
  Bridge.begin();   // Initialize the Bridge
  Serial.begin(9600);   // Initialize the Serial

  Process p;
 
  p.runShellCommand("/root/run_my_python.sh");

  // do nothing until the process finishes, so you get the whole output:
  while (p.running()){ ; }

  while (p.available()) { ; }
  delay(5000);  

}
void loop() { }

On the Linino, in a file called run_my_python.sh in /root:

#!/bin/sh
python /root/my_python_program.py

On the Linino, in a file called my_python_program.py in /root:

import os
os.system('touch /root/touched')

When I run

$ /root/run_my_python.sh

in the terminal, a file in /root named touched successfully gets created. However, when I run this from the Arduino, no file gets created. What am I doing wrong?

Perhaps this is related to some other issues I observed with runShellCommand, here: Process.runShellCommand - Shell program executed repeatedly - Arduino Yún - Arduino Forum

Thanks a bunch!

2

Arduino code:

...
// Serial.begin(9600);   // Initialize the Serial
...

Set permission:

chmod 755 run_my_python.sh

I found no problem at your code. It works for me.