how to perform
echo xyz | ssh [host]
(send xyz to host) with python?
I have tried pexpect
pexpect.spawn('echo xyz | ssh [host]')
but it's performing
echo 'xyz | ssh [host]'
maybe other package will be better?
-
Check out paramiko if you want to do SSH with Python.Keith– Keith2014-12-23 21:56:59 +00:00Commented Dec 23, 2014 at 21:56
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2 Answers
http://pexpect.sourceforge.net/pexpect.html#spawn
Gives an example of running a command with a pipe :
shell_cmd = 'ls -l | grep LOG > log_list.txt'
child = pexpect.spawn('/bin/bash', ['-c', shell_cmd])
child.expect(pexpect.EOF)
Previous incorrect attempt deleted to make sure no-one is confused by it.
1 Comment
Tony Suffolk 66
@user4815162342 - I have now edited my answer, and deleted my comments refering to it - care to do the same ?
You don't need pexpect to simulate a simple shell pipeline. The simplest way to emulate the pipeline is the os.system function:
os.system("echo xyz | ssh [host]")
A more Pythonic approach is to use the subprocess module:
p = subprocess.Popen(["ssh", "host"],
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
p.stdin.write("xyz\n")
output = p.communicate()[0]
2 Comments
Tony Suffolk 66
pexpect is a lot more powerful though if you need to parse the output, and look for things like prompts, errors, etc, but to run a simple subprocess you are right, pexpect is overload.
user4815162342
@TonySuffolk66 Agreed. My answer is based on the assumption that the OP needs to port the simple shell pipeline
echo xyz | ssh [host] to Python. The question doesn't make it clear if this is indeed the case, or if the OP needs pexpect for more involved stuff, such as typing in a passphrase and communicating in both directions.