| # Copyright 2011 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """Utilities to run commands in outside/inside chroot and on the board.""" |
| |
| import getpass |
| import os |
| import re |
| import select |
| import signal |
| import subprocess |
| import sys |
| import tempfile |
| import time |
| |
| import logger |
| import misc |
| |
| mock_default = False |
| |
| LOG_LEVEL = ("none", "quiet", "average", "verbose") |
| |
| def InitCommandExecuter(mock=False): |
| global mock_default |
| # Whether to default to a mock command executer or not |
| mock_default = mock |
| |
| |
| def GetCommandExecuter(logger_to_set=None, mock=False, log_level="verbose"): |
| # If the default is a mock executer, always return one. |
| if mock_default or mock: |
| return MockCommandExecuter(log_level, logger_to_set) |
| else: |
| return CommandExecuter(log_level, logger_to_set) |
| |
| |
| class CommandExecuter(object): |
| """Provides several methods to execute commands on several environments.""" |
| |
| def __init__(self, log_level, logger_to_set=None): |
| self.log_level = log_level |
| if log_level == "none": |
| self.logger = None |
| else: |
| if logger_to_set is not None: |
| self.logger = logger_to_set |
| else: |
| self.logger = logger.GetLogger() |
| |
| def GetLogLevel(self): |
| return self.log_level |
| |
| def SetLogLevel(self, log_level): |
| self.log_level = log_level |
| |
| def RunCommand(self, cmd, return_output=False, machine=None, |
| username=None, command_terminator=None, |
| command_timeout=None, |
| terminated_timeout=10, |
| print_to_console=True): |
| """Run a command.""" |
| |
| cmd = str(cmd) |
| |
| if self.log_level == "quiet": |
| print_to_console = False |
| |
| if self.log_level == "verbose": |
| self.logger.LogCmd(cmd, machine, username, print_to_console) |
| elif self.logger: |
| self.logger.LogCmdToFileOnly(cmd, machine, username) |
| if command_terminator and command_terminator.IsTerminated(): |
| if self.logger: |
| self.logger.LogError("Command was terminated!", print_to_console) |
| if return_output: |
| return [1, "", ""] |
| else: |
| return 1 |
| |
| if machine is not None: |
| user = "" |
| if username is not None: |
| user = username + "@" |
| cmd = "ssh -t -t %s%s -- '%s'" % (user, machine, cmd) |
| |
| # We use setsid so that the child will have a different session id |
| # and we can easily kill the process group. This is also important |
| # because the child will be disassociated from the parent terminal. |
| # In this way the child cannot mess the parent's terminal. |
| p = subprocess.Popen(cmd, stdout=subprocess.PIPE, |
| stderr=subprocess.PIPE, shell=True, |
| preexec_fn=os.setsid) |
| |
| full_stdout = "" |
| full_stderr = "" |
| |
| # Pull output from pipes, send it to file/stdout/string |
| out = err = None |
| pipes = [p.stdout, p.stderr] |
| |
| my_poll = select.poll() |
| my_poll.register(p.stdout, select.POLLIN) |
| my_poll.register(p.stderr, select.POLLIN) |
| |
| terminated_time = None |
| started_time = time.time() |
| |
| while len(pipes): |
| if command_terminator and command_terminator.IsTerminated(): |
| os.killpg(os.getpgid(p.pid), signal.SIGTERM) |
| if self.logger: |
| self.logger.LogError("Command received termination request. " |
| "Killed child process group.", |
| print_to_console) |
| break |
| |
| l = my_poll.poll(100) |
| for (fd, _) in l: |
| if fd == p.stdout.fileno(): |
| out = os.read(p.stdout.fileno(), 16384) |
| if return_output: |
| full_stdout += out |
| if self.logger: |
| self.logger.LogCommandOutput(out, print_to_console) |
| if out == "": |
| pipes.remove(p.stdout) |
| my_poll.unregister(p.stdout) |
| if fd == p.stderr.fileno(): |
| err = os.read(p.stderr.fileno(), 16384) |
| if return_output: |
| full_stderr += err |
| if self.logger: |
| self.logger.LogCommandError(err, print_to_console) |
| if err == "": |
| pipes.remove(p.stderr) |
| my_poll.unregister(p.stderr) |
| |
| if p.poll() is not None: |
| if terminated_time is None: |
| terminated_time = time.time() |
| elif (terminated_timeout is not None and |
| time.time() - terminated_time > terminated_timeout): |
| if self.logger: |
| self.logger.LogWarning("Timeout of %s seconds reached since " |
| "process termination." |
| % terminated_timeout, print_to_console) |
| break |
| |
| if (command_timeout is not None and |
| time.time() - started_time > command_timeout): |
| os.killpg(os.getpgid(p.pid), signal.SIGTERM) |
| if self.logger: |
| self.logger.LogWarning("Timeout of %s seconds reached since process" |
| "started. Killed child process group." |
| % command_timeout, print_to_console) |
| break |
| |
| if out == err == "": |
| break |
| |
| p.wait() |
| if return_output: |
| return (p.returncode, full_stdout, full_stderr) |
| return p.returncode |
| |
| def RemoteAccessInitCommand(self, chromeos_root, machine): |
| command = "" |
| command += "\nset -- --remote=" + machine |
| command += "\n. " + chromeos_root + "/src/scripts/common.sh" |
| command += "\n. " + chromeos_root + "/src/scripts/remote_access.sh" |
| command += "\nTMP=$(mktemp -d)" |
| command += "\nFLAGS \"$@\" || exit 1" |
| command += "\nremote_access_init" |
| return command |
| |
| def WriteToTempShFile(self, contents): |
| handle, command_file = tempfile.mkstemp(prefix=os.uname()[1], |
| suffix=".sh") |
| os.write(handle, "#!/bin/bash\n") |
| os.write(handle, contents) |
| os.close(handle) |
| return command_file |
| |
| |
| def CrosLearnBoard(self, chromeos_root, machine): |
| command = self.RemoteAccessInitCommand(chromeos_root, machine) |
| command += "\nlearn_board" |
| command += "\necho ${FLAGS_board}" |
| retval, output, _ = self.RunCommand(command, True) |
| if self.logger: |
| self.logger.LogFatalIf(retval, "learn_board command failed") |
| elif retval: |
| sys.exit(1) |
| return output.split()[-1] |
| |
| def CrosRunCommand(self, cmd, return_output=False, machine=None, |
| command_terminator=None, |
| chromeos_root=None, command_timeout=None, |
| terminated_timeout=10, print_to_console=True): |
| """Run a command on a chromeos box""" |
| |
| if self.log_level != "verbose": |
| print_to_console = False |
| |
| if self.logger: |
| self.logger.LogCmd(cmd, print_to_console=print_to_console) |
| self.logger.LogFatalIf(not machine, "No machine provided!") |
| self.logger.LogFatalIf(not chromeos_root, "chromeos_root not given!") |
| else: |
| if not chromeos_root or not machine: |
| sys.exit(1) |
| chromeos_root = os.path.expanduser(chromeos_root) |
| |
| # Write all commands to a file. |
| command_file = self.WriteToTempShFile(cmd) |
| retval = self.CopyFiles(command_file, command_file, |
| dest_machine=machine, |
| command_terminator=command_terminator, |
| chromeos_root=chromeos_root, |
| dest_cros=True, |
| recursive=False, |
| print_to_console=print_to_console) |
| if retval: |
| if self.logger: |
| self.logger.LogError("Could not run remote command on machine." |
| " Is the machine up?") |
| return retval |
| |
| command = self.RemoteAccessInitCommand(chromeos_root, machine) |
| command += "\nremote_sh bash %s" % command_file |
| command += "\nl_retval=$?; echo \"$REMOTE_OUT\"; exit $l_retval" |
| retval = self.RunCommand(command, return_output, |
| command_terminator=command_terminator, |
| command_timeout=command_timeout, |
| terminated_timeout=terminated_timeout, |
| print_to_console=print_to_console) |
| if return_output: |
| connect_signature = ("Initiating first contact with remote host\n" + |
| "Connection OK\n") |
| connect_signature_re = re.compile(connect_signature) |
| modded_retval = list(retval) |
| modded_retval[1] = connect_signature_re.sub("", retval[1]) |
| return modded_retval |
| return retval |
| |
| def ChrootRunCommand(self, chromeos_root, command, return_output=False, |
| command_terminator=None, command_timeout=None, |
| terminated_timeout=10, |
| print_to_console=True, |
| cros_sdk_options=""): |
| |
| if self.log_level != "verbose": |
| print_to_console = False |
| |
| if self.logger: |
| self.logger.LogCmd(command, print_to_console=print_to_console) |
| |
| handle, command_file = tempfile.mkstemp(dir=os.path.join(chromeos_root, |
| "src/scripts"), |
| suffix=".sh", |
| prefix="in_chroot_cmd") |
| os.write(handle, "#!/bin/bash\n") |
| os.write(handle, command) |
| os.write(handle, "\n") |
| os.close(handle) |
| |
| os.chmod(command_file, 0777) |
| |
| # if return_output is set, run a dummy command first to make sure that |
| # the chroot already exists. We want the final returned output to skip |
| # the output from chroot creation steps. |
| if return_output: |
| ret = self.RunCommand("cd %s; cros_sdk %s -- true" % |
| (chromeos_root, cros_sdk_options)) |
| if ret: |
| return (ret, "", "") |
| |
| # Run command_file inside the chroot, making sure that any "~" is expanded |
| # by the shell inside the chroot, not outside. |
| command = ("cd %s; cros_sdk %s -- bash -c '%s/%s'" % |
| (chromeos_root, |
| cros_sdk_options, |
| misc.CHROMEOS_SCRIPTS_DIR, |
| os.path.basename(command_file))) |
| ret = self.RunCommand(command, return_output, |
| command_terminator=command_terminator, |
| command_timeout=command_timeout, |
| terminated_timeout=terminated_timeout, |
| print_to_console=print_to_console) |
| os.remove(command_file) |
| return ret |
| |
| |
| def RunCommands(self, cmdlist, return_output=False, machine=None, |
| username=None, command_terminator=None): |
| cmd = " ;\n" .join(cmdlist) |
| return self.RunCommand(cmd, return_output, machine, username, |
| command_terminator) |
| |
| def CopyFiles(self, src, dest, src_machine=None, dest_machine=None, |
| src_user=None, dest_user=None, recursive=True, |
| command_terminator=None, |
| chromeos_root=None, src_cros=False, dest_cros=False, |
| print_to_console=True): |
| src = os.path.expanduser(src) |
| dest = os.path.expanduser(dest) |
| |
| if recursive: |
| src = src + "/" |
| dest = dest + "/" |
| |
| if src_cros == True or dest_cros == True: |
| if self.logger: |
| self.logger.LogFatalIf(src_cros == dest_cros, |
| "Only one of src_cros and desc_cros can " |
| "be True.") |
| self.logger.LogFatalIf(not chromeos_root, "chromeos_root not given!") |
| elif src_cros == dest_cros or not chromeos_root: |
| sys.exit(1) |
| if src_cros == True: |
| cros_machine = src_machine |
| else: |
| cros_machine = dest_machine |
| |
| command = self.RemoteAccessInitCommand(chromeos_root, cros_machine) |
| ssh_command = ("ssh -p ${FLAGS_ssh_port}" + |
| " -o StrictHostKeyChecking=no" + |
| " -o UserKnownHostsFile=$(mktemp)" + |
| " -i $TMP_PRIVATE_KEY") |
| rsync_prefix = "\nrsync -r -e \"%s\" " % ssh_command |
| if dest_cros == True: |
| command += rsync_prefix + "%s root@%s:%s" % (src, dest_machine, dest) |
| return self.RunCommand(command, |
| machine=src_machine, |
| username=src_user, |
| command_terminator=command_terminator, |
| print_to_console=print_to_console) |
| else: |
| command += rsync_prefix + "root@%s:%s %s" % (src_machine, src, dest) |
| return self.RunCommand(command, |
| machine=dest_machine, |
| username=dest_user, |
| command_terminator=command_terminator, |
| print_to_console=print_to_console) |
| |
| |
| if dest_machine == src_machine: |
| command = "rsync -a %s %s" % (src, dest) |
| else: |
| if src_machine is None: |
| src_machine = os.uname()[1] |
| src_user = getpass.getuser() |
| command = "rsync -a %s@%s:%s %s" % (src_user, src_machine, src, dest) |
| return self.RunCommand(command, |
| machine=dest_machine, |
| username=dest_user, |
| command_terminator=command_terminator, |
| print_to_console=print_to_console) |
| |
| |
| def RunCommand2(self, cmd, cwd=None, line_consumer=None, |
| timeout=None, shell=True, join_stderr=True, env=None): |
| """Run the command with an extra feature line_consumer. |
| |
| This version allow developers to provide a line_consumer which will be |
| fed execution output lines. |
| |
| A line_consumer is a callback, which is given a chance to run for each |
| line the execution outputs (either to stdout or stderr). The |
| line_consumer must accept one and exactly one dict argument, the dict |
| argument has these items - |
| 'line' - The line output by the binary. Notice, this string includes |
| the trailing '\n'. |
| 'output' - Whether this is a stdout or stderr output, values are either |
| 'stdout' or 'stderr'. When join_stderr is True, this value |
| will always be 'output'. |
| 'pobject' - The object used to control execution, for example, call |
| pobject.kill(). |
| |
| Note: As this is written, the stdin for the process executed is |
| not associated with the stdin of the caller of this routine. |
| |
| Args: |
| cmd: Command in a single string. |
| cwd: Working directory for execution. |
| line_consumer: A function that will ba called by this function. See above |
| for details. |
| timeout: terminate command after this timeout. |
| shell: Whether to use a shell for execution. |
| join_stderr: Whether join stderr to stdout stream. |
| env: Execution environment. |
| |
| Returns: |
| Execution return code. |
| |
| Raises: |
| child_exception: if fails to start the command process (missing |
| permission, no such file, etc) |
| """ |
| |
| class StreamHandler(object): |
| """Internal utility class.""" |
| |
| def __init__(self, pobject, fd, name, line_consumer): |
| self._pobject = pobject |
| self._fd = fd |
| self._name = name |
| self._buf = '' |
| self._line_consumer = line_consumer |
| |
| def read_and_notify_line(self): |
| t = os.read(fd, 1024) |
| self._buf = self._buf + t |
| self.notify_line() |
| |
| def notify_line(self): |
| p = self._buf.find('\n') |
| while p >= 0: |
| self._line_consumer(line=self._buf[:p+1], output=self._name, |
| pobject=self._pobject) |
| if p < len(self._buf) - 1: |
| self._buf = self._buf[p+1:] |
| p = self._buf.find('\n') |
| else: |
| self._buf = '' |
| p = -1 |
| break |
| |
| def notify_eos(self): |
| # Notify end of stream. The last line may not end with a '\n'. |
| if self._buf != '': |
| self._line_consumer(line=self._buf, output=self._name, |
| pobject=self._pobject) |
| self._buf = '' |
| |
| if self.log_level == "verbose": |
| self.logger.LogCmd(cmd) |
| elif self.logger: |
| self.logger.LogCmdToFileOnly(cmd) |
| |
| # We use setsid so that the child will have a different session id |
| # and we can easily kill the process group. This is also important |
| # because the child will be disassociated from the parent terminal. |
| # In this way the child cannot mess the parent's terminal. |
| pobject = subprocess.Popen( |
| cmd, cwd=cwd, bufsize=1024, env=env, shell=shell, |
| universal_newlines=True, stdout=subprocess.PIPE, |
| stderr=subprocess.STDOUT if join_stderr else subprocess.PIPE, |
| preexec_fn=os.setsid) |
| |
| # We provide a default line_consumer |
| if line_consumer is None: |
| line_consumer = lambda **d: None |
| start_time = time.time() |
| poll = select.poll() |
| outfd = pobject.stdout.fileno() |
| poll.register(outfd, select.POLLIN | select.POLLPRI) |
| handlermap = {outfd: StreamHandler(pobject, outfd, 'stdout', line_consumer)} |
| if not join_stderr: |
| errfd = pobject.stderr.fileno() |
| poll.register(errfd, select.POLLIN | select.POLLPRI) |
| handlermap[errfd] = StreamHandler( |
| pobject, errfd, 'stderr', line_consumer) |
| while len(handlermap): |
| readables = poll.poll(300) |
| for (fd, evt) in readables: |
| handler = handlermap[fd] |
| if evt & (select.POLLPRI | select.POLLIN): |
| handler.read_and_notify_line() |
| elif evt & (select.POLLHUP | select.POLLERR | select.POLLNVAL): |
| handler.notify_eos() |
| poll.unregister(fd) |
| del handlermap[fd] |
| |
| if timeout is not None and (time.time() - start_time > timeout): |
| os.killpg(os.getpgid(pobject.pid), signal.SIGTERM) |
| |
| return pobject.wait() |
| |
| |
| class MockCommandExecuter(CommandExecuter): |
| """Mock class for class CommandExecuter.""" |
| def __init__(self, log_level, logger_to_set=None): |
| super(MockCommandExecuter, self).__init__(log_level, logger_to_set) |
| |
| def RunCommand(self, cmd, return_output=False, machine=None, |
| username=None, command_terminator=None, |
| command_timeout=None, terminated_timeout=10, |
| print_to_console=True): |
| assert not command_timeout |
| cmd = str(cmd) |
| if machine is None: |
| machine = "localhost" |
| if username is None: |
| username = "current" |
| logger.GetLogger().LogCmd("(Mock) " + cmd, machine, |
| username, print_to_console) |
| return 0 |
| |
| |
| class CommandTerminator(object): |
| """Object to request termination of a command in execution.""" |
| def __init__(self): |
| self.terminated = False |
| |
| def Terminate(self): |
| self.terminated = True |
| |
| def IsTerminated(self): |
| return self.terminated |
