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import subprocess
import threading
import logging
from vstf.common import constants
LOG = logging.getLogger(__name__)
class CommandLine(object):
def __init__(self):
super(CommandLine, self).__init__()
self.proc = None
self.is_timeout = False
def __kill_proc(self):
self.is_timeout = True
self.proc.kill()
def execute(self, cmd, timeout=constants.TIMEOUT, shell=False):
"""this func call subprocess.Popen(),
here setup a timer to deal with timeout.
:param cmd: cmd list like ['ls', 'home']
:param timeout: for timer count for timeout
:return: (ret, output) the output (stdout+'\n'+stderr)
"""
# reset the timeout flag
self.is_timeout = False
self.proc = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
shell=shell)
timer = threading.Timer(timeout, self.__kill_proc, [])
timer.start()
stdout, stderr = self.proc.communicate()
timer.cancel()
if self.proc.returncode or self.is_timeout:
if self.is_timeout:
LOG.error("run cmd<%(cmd)s> timeout", {"cmd": cmd})
ret = False
output = "".join([stderr, stdout])
else:
ret = True
output = stdout
return ret, output
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