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ac341af8fa
Provides a class for setting up ssh connections, running commands and copying files to/from a target. (From OE-Core rev: 683cac9768e0d38fa15ddc5451e6b2333f184033) Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
101 lines
3.6 KiB
Python
101 lines
3.6 KiB
Python
import subprocess
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import time
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import os
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import shlex
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class SSHControl(object):
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def __init__(self, host=None, timeout=200, logfile=None):
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self.host = host
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self.timeout = timeout
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self._out = ''
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self._ret = 126
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self.logfile = logfile
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def log(self, msg):
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if self.logfile:
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with open(self.logfile, "a") as f:
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f.write("%s\n" % msg)
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def _internal_run(self, cmd):
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# ssh hangs without os.setsid
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proc = subprocess.Popen(shlex.split(cmd), shell=False, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, preexec_fn=os.setsid)
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return proc
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def run(self, cmd, timeout=None):
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"""Run cmd and get it's return code and output.
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Let it run for timeout seconds and then terminate/kill it,
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if time is 0 will let cmd run until it finishes.
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Time can be passed to here or can be set per class instance."""
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actualcmd = "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -l root %s '%s'" % (self.host, cmd)
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if self.host:
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sshconn = self._internal_run(actualcmd)
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else:
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raise Exception("Remote IP hasn't been set: '%s'" % actualcmd)
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if timeout == 0:
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self.log("[SSH run without timeout]$ %s" % actualcmd)
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self.log(" # %s" % cmd)
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self._out = sshconn.communicate()[0]
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self._ret = sshconn.poll()
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else:
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if timeout is None:
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endtime = time.time() + self.timeout
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else:
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endtime = time.time() + timeout
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while sshconn.poll() is None and time.time() < endtime:
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time.sleep(1)
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self.log("[SSH run with timeout]$ %s" % actualcmd)
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self.log(" # %s" % cmd)
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# process hasn't returned yet
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if sshconn.poll() is None:
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self._ret = 255
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sshconn.terminate()
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sshconn.kill()
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self._out = sshconn.stdout.read()
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sshconn.stdout.close()
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self.log("[!!! process killed]")
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else:
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self._out = sshconn.stdout.read()
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self._ret = sshconn.poll()
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# remove first line from output which is always smth like (unless return code is 255 - which is a ssh error):
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# Warning: Permanently added '192.168.7.2' (RSA) to the list of known hosts.
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if self._ret != 255:
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self._out = '\n'.join(self._out.splitlines()[1:])
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self.log("%s" % self._out)
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self.log("[SSH command returned]: %s" % self._ret)
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return (self._ret, self._out)
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def _internal_scp(self, cmd):
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self.log("[SCP]$ %s" % cmd)
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scpconn = self._internal_run(cmd)
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try:
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self._out = scpconn.communicate()[0]
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self._ret = scpconn.poll()
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if self._ret != 0:
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self.log("%s" % self._out)
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raise Exception("Error copying file")
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except Exception as e:
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print("Execution failed: %s :" % cmd)
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print e
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self.log("%s" % self._out)
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return (self._ret, self._out)
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def copy_to(self, localpath, remotepath):
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actualcmd = "scp -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no %s root@%s:%s" % (localpath, self.host, remotepath)
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return self._internal_scp(actualcmd)
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def copy_from(self, remotepath, localpath):
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actualcmd = "scp -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no root@%s:%s %s" % (self.host, remotepath, localpath)
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return self._internal_scp(actualcmd)
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def get_status(self):
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return self._ret
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def get_output(self):
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return self._out
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