Raspberry PI: PHP call python script with sudo

Question

i'm running Nginx on my Raspberry PI with PHP 5.4.14 (fpm-fcgi). It all works well. But in one script i make a shell call using shell_exec.

echo shell_exec("sudo python " . $file);

it works well if i use the console with

php test.php

but if i use the browser to call this file the php-file will be executed but i don't get any output by the shell_exec (not even an error message).

So i hope you could help me fix this problem.

The called python file makes use of the GPIO so sudo is required, right?

Here is my python code:

#!/usr/bin/env python
try:
    import RPi.GPIO as GPIO
except RuntimeError:
    print "Error Importing GPIO. Did your forgot the superuser privilieges?"

GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(False)

GPIO.setup(3, GPIO.OUT)

GPIO.output(3, not GPIO.input(3))

print "New LED state is: ", GPIO.input(3)

#GPIO.cleanup()

Community · Accepted Answer · 2017-04-13 12:56:22Z

2

for future reference:

I found a - i my eyes - not really nice solution:

sudo echo "apache ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers

Found here.

edited Apr 13, 2017 at 12:56

CommunityBot

11 silver badge

answered Jun 10, 2013 at 15:25

Le_Morri

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Comments

RaspiLaTaupe · Accepted Answer · 2013-06-06 19:40:56Z

0

Mm, i have try with this two simple example:

/Scripts/test.py

#!/usr/bin/env python
print (str('hello world'))

/var/www/test.php

<?php
echo shell_exec('/Scripts/test.py');
?>

via a browser, show me "hello world"

Perhaps try this:

chmod a+x your_py_file.py

Hope that help..

answered Jun 6, 2013 at 19:40

RaspiLaTaupe

12 bronze badges

2 Comments

Le_Morri Over a year ago

i will test this, as soon as i'm back home. But still i'm missing a sudo there. Or is it not needed?

Le_Morri Over a year ago

so after the chmod i at least got an error message. "Error Importing GPIO. Did you forgot the superuser privilieges?" this means i still have the problem with the missing sudo, due to the GPIO. I added the python code to the question above.

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