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