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# Host class
# Copyright (c) 2016, Qualcomm Atheros, Inc.
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
import logging
import subprocess
import threading
import tempfile
import os
import traceback
import select
logger = logging.getLogger()
def remote_compatible(func):
func.remote_compatible = True
return func
def execute_thread(command, reply):
cmd = ' '.join(command)
logger.debug("thread run: " + cmd)
err = tempfile.TemporaryFile()
try:
status = 0
buf = subprocess.check_output(command, stderr=err, bufsize=0).decode()
except subprocess.CalledProcessError as e:
status = e.returncode
err.seek(0)
buf = err.read()
err.close()
logger.debug("thread cmd: " + cmd)
logger.debug("thread exit status: " + str(status))
logger.debug("thread exit buf: " + str(buf))
reply.append(status)
reply.append(buf)
def gen_reaper_file(conf):
fd, filename = tempfile.mkstemp(dir='/tmp', prefix=conf + '-')
f = os.fdopen(fd, 'w')
f.write("#!/bin/sh\n")
f.write("name=\"$(basename $0)\"\n")
f.write("echo $$ > /tmp/$name.pid\n")
f.write("exec \"$@\"\n");
return filename;
class Host():
def __init__(self, host=None, ifname=None, port=None, name="", user="root"):
self.host = host
self.name = name
self.user = user
self.monitors = []
self.monitor_thread = None
self.logs = []
self.ifname = ifname
self.port = port
self.dev = None
self.monitor_params = []
if self.name == "" and host != None:
self.name = host
def local_execute(self, command):
logger.debug("execute: " + str(command))
err = tempfile.TemporaryFile()
try:
status = 0
buf = subprocess.check_output(command, stderr=err)
except subprocess.CalledProcessError as e:
status = e.returncode
err.seek(0)
buf = err.read()
err.close()
logger.debug("status: " + str(status))
logger.debug("buf: " + str(buf))
return status, buf.decode()
def execute(self, command):
if self.host is None:
return self.local_execute(command)
cmd = ["ssh", self.user + "@" + self.host, ' '.join(command)]
_cmd = self.name + " execute: " + ' '.join(cmd)
logger.debug(_cmd)
err = tempfile.TemporaryFile()
try:
status = 0
buf = subprocess.check_output(cmd, stderr=err)
except subprocess.CalledProcessError as e:
status = e.returncode
err.seek(0)
buf = err.read()
err.close()
logger.debug(self.name + " status: " + str(status))
logger.debug(self.name + " buf: " + str(buf))
return status, buf.decode()
# async execute
def thread_run(self, command, res, use_reaper=True):
if use_reaper:
filename = gen_reaper_file("reaper")
self.send_file(filename, filename)
self.execute(["chmod", "755", filename])
_command = [filename] + command
else:
filename = ""
_command = command
if self.host is None:
cmd = _command
else:
cmd = ["ssh", self.user + "@" + self.host, ' '.join(_command)]
_cmd = self.name + " thread_run: " + ' '.join(cmd)
logger.debug(_cmd)
t = threading.Thread(target=execute_thread, name=filename, args=(cmd, res))
t.start()
return t
def thread_stop(self, t):
if t.name.find("reaper") == -1:
raise Exception("use_reaper required")
pid_file = t.name + ".pid"
if t.is_alive():
cmd = ["kill `cat " + pid_file + "`"]
self.execute(cmd)
# try again
self.thread_wait(t, 5)
if t.is_alive():
cmd = ["kill `cat " + pid_file + "`"]
self.execute(cmd)
# try with -9
self.thread_wait(t, 5)
if t.is_alive():
cmd = ["kill -9 `cat " + pid_file + "`"]
self.execute(cmd)
self.thread_wait(t, 5)
if t.is_alive():
raise Exception("thread still alive")
self.execute(["rm", pid_file])
self.execute(["rm", t.name])
self.local_execute(["rm", t.name])
def thread_wait(self, t, wait=None):
if wait == None:
wait_str = "infinite"
else:
wait_str = str(wait) + "s"
logger.debug(self.name + " thread_wait(" + wait_str + "): ")
if t.is_alive():
t.join(wait)
def pending(self, s, timeout=0):
[r, w, e] = select.select([s], [], [], timeout)
if r:
return True
return False
def proc_run(self, command):
filename = gen_reaper_file("reaper")
self.send_file(filename, filename)
self.execute(["chmod", "755", filename])
_command = [filename] + command
if self.host:
cmd = ["ssh", self.user + "@" + self.host, ' '.join(_command)]
else:
cmd = _command
_cmd = self.name + " proc_run: " + ' '.join(cmd)
logger.debug(_cmd)
err = tempfile.TemporaryFile()
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=err,
bufsize=0)
proc.reaper_file = filename
return proc
def proc_wait_event(self, proc, events, timeout=10):
if not isinstance(events, list):
raise Exception("proc_wait_event() events not a list")
logger.debug(self.name + " proc_wait_event: " + ' '.join(events) + " timeout: " + str(timeout))
start = os.times()[4]
try:
while True:
while self.pending(proc.stdout):
line = proc.stdout.readline()
if not line:
return None
line = line.decode()
logger.debug(line.strip('\n'))
for event in events:
if event in line:
return line
now = os.times()[4]
remaining = start + timeout - now
if remaining <= 0:
break
if not self.pending(proc.stdout, timeout=remaining):
break
except:
logger.debug(traceback.format_exc())
pass
return None
def proc_stop(self, proc):
if not proc:
return
self.execute(["kill `cat " + proc.reaper_file + ".pid`"])
self.execute(["rm", proc.reaper_file + ".pid"])
self.execute(["rm", proc.reaper_file])
self.local_execute(["rm", proc.reaper_file])
proc.kill()
def proc_dump(self, proc):
if not proc:
return ""
return proc.stdout.read()
def execute_and_wait_event(self, command, events, timeout=10):
proc = None
ev = None
try:
proc = self.proc_run(command)
ev = self.proc_wait_event(proc, events, timeout)
except:
pass
self.proc_stop(proc)
return ev
def add_log(self, log_file):
self.logs.append(log_file)
def get_logs(self, local_log_dir=None):
for log in self.logs:
if local_log_dir:
self.local_execute(["scp", self.user + "@[" + self.host + "]:" + log, local_log_dir])
self.execute(["rm", log])
del self.logs[:]
def send_file(self, src, dst):
if self.host is None:
return
self.local_execute(["scp", src,
self.user + "@[" + self.host + "]:" + dst])
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