get pid of process in subprocess python + bash

Question

I need to find pid of proccess started in bash script with another program. I use sshpass to enter the password, sshpass start ssh client and that client open sshtunnel to server. Here is examples:

start_tunnel.sh
#!/bin/bash
exec sshpass -p 'passw' ssh -D :port user@$server -o StrictHostKeyChecking=no -f -N
exit

And I start it with subrocess.Popen:

proc = subprocess.Popen('start_tunnel.sh')

The script start just fine, it normally finish and return 0, I can get it PID, but is it possible to get the PID of started sshclient?

staples · Accepted Answer · 2016-11-10 05:45:16Z

1

By default proc.pid will return the PID of the shell (ie the parent process). What you're looking for is the PID of the child process (sshpass).

So set shell=False in subprocess.Popen. Documentation is here.

answered Nov 10, 2016 at 5:45

staples

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Keith · Accepted Answer · 2016-11-10 05:40:04Z

0

Just call the sshpass directly from Popen and pass in the shell=False option. Then the direct child will the be the sshpass subprocess. No need for a shell wrapper.

answered Nov 10, 2016 at 5:40

Keith

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1 Comment

Marselo Bonagi Over a year ago

Thanks for unswers guys, if I do this, I get sshpass PID, but is it possible to get PID of sshclient proccess, which spawned by sshpass proccess?

oliver · Accepted Answer · 2016-11-10 05:51:30Z

0

Using subprocess.Popen I would simply call the shell=false option.

answered Nov 10, 2016 at 5:51

oliver

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