[SOLVED] python subprocess - get exit status of command run on different machine using rsh

python subprocess - get exit status of command run on different machine using rsh

I am trying to run some commands on some machine which I am connecting through the rsh command (can't use ssh for my case).

Through subprocess.check_call function, I am executing the command and am expecting check_call to exit with exception when exit status of my "cd /libs/ " command indicates failure.

Below is the code I am trying out.

with open('logs.txt','w') as outstream:
    subprocess.check_call("rsh bldr 'cd /libs/' ", shell=True,stdout=outstream)

But here, rsh only returns its exit status and not the command it's executing.

Because of which even in command failure case no error from check_call function, as it is getting rsh exit status which will be 0 always.

So, how to get the exit status of the command here?

Also, how can I make check_call fail based on my command exit status?

Note: I am trying to change directory to /libs which doesn't exist. I am hoping for check_call to fail here and stop execution of script.

Solution

Capture stderr as well which can be used for checking if command has failed on remote machine.

with open('logs.txt','w') as outstream:
    with open('error.txt','w') as errstream:
        ret = subprocess.check_call("rsh centos lsh", shell=True, stderr=errstream, stdout=outstream)

fpstat = os.stat('error.txt')
if fpstat.st_size > 0:
    print("problem in command on remote machine.")
else:
    print("Successful.")