Subprocess lib

[peterkl]

Hello guys,

I've been experimenting with the subprocess library in python 3.5 on linux.

I've been able to run a few commands with success, but when it comes to run more than one commands at a time, I
don't seem to able to do it. Take a look at this code :

import subprocess, shlex 

command1 = 'ls -laZ > file1.txt'  
args = shlex.split(command1)
#print (args)
final = subprocess.Popen(args)

I can run the command ls with its arguments fine, but when I want to redirect the output with > to a a new file (file1) I get the following errors :

Error:
['ls', '-laZ', '>', 'file1.txt']
ls: cannot access '>': No such file or directory
ls: cannot access 'file1.txt': No such file or directory

I've already tried to use shell=True, but it has no affect. In conclusion is there a way to run several commands at once with subprocess lib instead of just one (with or not its arguments) ?

Thank you for reading this.

[metulburr]

remove the split

import subprocess
 
command1 = 'ls -laZ > file1.txt'  
final = subprocess.Popen(command1, shell=True)

Or you could just pipe it through python

import subprocess
 
command1 = 'ls -laZ'  
proc = subprocess.Popen(command1.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = proc.communicate()
with open('file1.txt','w') as f:
    f.write('{}{}'.format(out, err))

[peterkl]

It worked fine without the slip. Bit since the shell is True, my program is vulnerable to shell injection which I did not want to, I must read the documentation better, because I saw if the command was a string, like I have now, shell injection won't work. Do you know perhaps something more about this ?

Thank you so much for your answer, really helped me out.