Run python script multiple times as a background process with different configuration
Question
I used php to run python script on Linux via web after running and I get process ID
<!DOCTYPE html>
<html>
<body>
<?php
echo 'Starting the mapping process';
echo exec('nohup python cloudemir.py '.$_GET[message].' > /dev/null 2>&1 & echo $! &');
?>
</body>
</html>
which is then used to kill the process when I don't need it which works fine
<!DOCTYPE html>
<html>
<body>
<?php
$pid=$_GET['pid'];
echo exec("kill -9 $pid");
?>
</body>
</html>
The python script I used is just publishing one message via MQTT every second. The problem is that I can't change the message content.
If the message is Hi, and I run this process, it says "Hi", "Hi"... every second. If I change python script message to Hi2, and run it again I get new process id and new message is Hi2 every second and there is no Hi message any more.
I need it to run separately and to get both messages, and when needed to kill one of them. I need it to be able to run unlimited number of instances of that python sctipt with different configuiration, I don't need to build new scripts.
domain/run.php?message=Hi
domain/run.php?message=Hi2
This should print Hi, Hi2, Hi, Hi2
domain/run.php?message=Hi
domain/run.php?message=Hi2
domain/run.php?message=Hi3
This should print Hi, Hi2, Hi3, Hi, Hi2, Hi3
In both cases it prints only last message
I even tried the same without php, but calling the script from another python script with
proc = subprocess.Popen("nohup python cloudemir.py "+content+" > /dev/null 2>&1 &", shell=True)
But it remains the same, last call overwrites the previous
1 answers
solution1
1 2020-02-20 14:21:02
You should use sys.argv . As an example of the file cloudemir.py :
import sys
print(sys.argv[0])
And then you can call it with:
python cloudemir.py Hi # First time
python cloudemir.py Hi2 # Second time
This way the name after cloudemir.py will be inputed as a param to the python program.
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