subprocess.Popen（）读取文件

Question

I'm trying to use subprocess to read a file stored in a remote server.

import subprocess
import sys

ssh = subprocess.Popen(['ssh', 'hjh:passwd@myserver', 'cat', 'data/test.txt'],
                   shell=False,
                   stdout=subprocess.PIPE,
                   stderr=subprocess.PIPE)
result = ssh.stdout.readlines()
if result == []:
    error = ssh.stderr.readlines()
    print >>sys.stderr, "ERROR: %s" % error
else:
    print result

Now running this results in the error

Traceback (most recent call last):
  File "C:/Users/hjh/Desktop/try.py", line 15, in <module>
stderr=subprocess.PIPE)
  File "C:\Python27\lib\subprocess.py", line 710, in __init__
errread, errwrite)
  File "C:\Python27\lib\subprocess.py", line 958, in _execute_child
startupinfo)
WindowsError: [Error 2] The system cannot find the file specified

Does this error mean that the file on the server cannot be found? or is there an error in subprocess? Google wasn't much of a help for me on this error.

I also work with a Proxy which is not specified here, can that be a problem?

Cheers,

Answer 1

I suppose that Windows is unable to find the SSH executable. Check what happens when you type ssh in the cmd.exe . Try adding a full path to the SSH client executable in the Popen call or add SSH's directory to the PATH environment variable.

Answer 2

It seems like "ssh" cannot be resolved. I would either fully qualify the location to the ssh executable in the Popen constructor call and/or it is in the searchable PATH.