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# !/usr/bin/python
# Copyright 2017 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Fastboot Interface Implementation using subprocess library."""
import os
import subprocess
import sys
import threading
import fastboot_exceptions
CREATE_NO_WINDOW = 0x08000000
def _GetCurrentPath():
if getattr(sys, 'frozen', False):
# we are running in a bundle
path = sys._MEIPASS # pylint: disable=protected-access
else:
# we are running in a normal Python environment
path = os.path.dirname(os.path.abspath(__file__))
return path
class FastbootDevice(object):
"""An abstracted fastboot device object.
Attributes:
serial_number: The serial number of the fastboot device.
"""
current_path = _GetCurrentPath()
fastboot_command = os.path.join(current_path, 'fastboot')
HOST_OS = 'Windows'
@staticmethod
def ListDevices():
"""List all fastboot devices.
Returns:
A list of serial numbers for all the fastboot devices.
"""
try:
out = subprocess.check_output(
[FastbootDevice.fastboot_command, 'devices'],
creationflags=CREATE_NO_WINDOW)
device_serial_numbers = (out.replace('\tfastboot', '')
.rstrip().splitlines())
# filter out empty string
return filter(None, device_serial_numbers)
except subprocess.CalledProcessError as e:
raise fastboot_exceptions.FastbootFailure(e.output)
def __init__(self, serial_number):
"""Initiate the fastboot device object.
Args:
serial_number: The serial number of the fastboot device.
"""
self.serial_number = serial_number
# Lock to make sure only one fastboot command can be issued to one device
# at one time.
self._lock = threading.Lock()
def Reboot(self):
"""Reboot the device into fastboot mode.
Returns:
The command output.
"""
try:
self._lock.acquire()
out = subprocess.check_output(
[FastbootDevice.fastboot_command, '-s', self.serial_number,
'reboot-bootloader'], creationflags=CREATE_NO_WINDOW)
return out
except subprocess.CalledProcessError as e:
raise fastboot_exceptions.FastbootFailure(e.output)
finally:
self._lock.release()
def Oem(self, oem_command, err_to_out):
""""Run an OEM command.
Args:
oem_command: The OEM command to run.
err_to_out: Whether to redirect stderr to stdout.
Returns:
The result message for the OEM command.
Raises:
FastbootFailure: If failure happens during the command.
"""
try:
self._lock.acquire()
# We need to redirect the output no matter err_to_out is set
# So that FastbootFailure can catch the right error.
return subprocess.check_output(
[
FastbootDevice.fastboot_command, '-s', self.serial_number,
'oem', oem_command
],
stderr=subprocess.STDOUT,
creationflags=CREATE_NO_WINDOW)
except subprocess.CalledProcessError as e:
raise fastboot_exceptions.FastbootFailure(e.output)
finally:
self._lock.release()
def Upload(self, file_path):
"""Pulls a file from the fastboot device to the local file system.
Args:
file_path: The file path of the file system
that the remote file would be pulled to.
Returns:
The output for the fastboot command required.
Raises:
FastbootFailure: If failure happens during the command.
"""
try:
self._lock.acquire()
return subprocess.check_output(
[
FastbootDevice.fastboot_command, '-s', self.serial_number,
'get_staged', file_path
],
creationflags=CREATE_NO_WINDOW)
except subprocess.CalledProcessError as e:
raise fastboot_exceptions.FastbootFailure(e.output)
finally:
self._lock.release()
def Download(self, file_path):
"""Push a file from the file system to the fastboot device.
Args:
file_path: The file path of the file on the local file system
that would be pushed to fastboot device.
Returns:
The output for the fastboot command required.
Raises:
FastbootFailure: If failure happens during the command.
"""
try:
self._lock.acquire()
return subprocess.check_output(
[
FastbootDevice.fastboot_command, '-s', self.serial_number,
'stage', file_path
],
creationflags=CREATE_NO_WINDOW)
except subprocess.CalledProcessError as e:
raise fastboot_exceptions.FastbootFailure(e.output)
finally:
self._lock.release()
def GetVar(self, var):
"""Get a variable from the device.
Note that the return value is in stderr instead of stdout.
Args:
var: The name of the variable.
Returns:
The value for the variable.
Raises:
FastbootFailure: If failure happens during the command.
"""
try:
# Fastboot getvar command's output would be in stderr instead of stdout.
# Need to redirect stderr to stdout.
self._lock.acquire()
# Need the shell=True flag for windows, otherwise it hangs.
out = subprocess.check_output(
[
FastbootDevice.fastboot_command, '-s', self.serial_number,
'getvar', var
],
stderr=subprocess.STDOUT,
shell=True,
creationflags=CREATE_NO_WINDOW)
except subprocess.CalledProcessError as e:
# Since we redirected stderr, we should print stdout here.
raise fastboot_exceptions.FastbootFailure(e.output)
finally:
self._lock.release()
if var == 'at-vboot-state':
# For the result of vboot-state, it does not follow the standard.
return out
lines = out.splitlines()
for line in lines:
if line.startswith(var + ': '):
value = line.replace(var + ': ', '').replace('\r', '')
return value
@staticmethod
def GetHostOs():
return FastbootDevice.HOST_OS
def Disconnect(self):
"""Disconnect from the fastboot device."""
pass
def __del__(self):
self.Disconnect()
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