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platform_build/tools/releasetools/ota_from_target_files
Doug Zongker 91a99c28e0 fix ota script to generate non-block commands correctly 
If you had a target_files without a recovery patch and specified
--block (which should have no effect without a patch), it would have
omitted some necessary commands from the OTA script.

Change-Id: I96e79cd561ebf09cfe53792d1cc558cc71479869
2014-05-09 13:16:50 -07:00

1427 lines
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Python
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#!/usr/bin/env python
#
# Copyright (C) 2008 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.
"""
Given a target-files zipfile, produces an OTA package that installs
that build. An incremental OTA is produced if -i is given, otherwise
a full OTA is produced.
Usage: ota_from_target_files [flags] input_target_files output_ota_package
--board_config <file>
Deprecated.
-k (--package_key) <key> Key to use to sign the package (default is
the value of default_system_dev_certificate from the input
target-files's META/misc_info.txt, or
"build/target/product/security/testkey" if that value is not
specified).
For incremental OTAs, the default value is based on the source
target-file, not the target build.
-i (--incremental_from) <file>
Generate an incremental OTA using the given target-files zip as
the starting build.
-o (--oem_settings) <file>
Use the file to specify the expected OEM-specific properties
on the OEM partition of the intended device.
-w (--wipe_user_data)
Generate an OTA package that will wipe the user data partition
when installed.
-n (--no_prereq)
Omit the timestamp prereq check normally included at the top of
the build scripts (used for developer OTA packages which
legitimately need to go back and forth).
-e (--extra_script) <file>
Insert the contents of file at the end of the update script.
-a (--aslr_mode) <on|off>
Specify whether to turn on ASLR for the package (on by default).
-2 (--two_step)
Generate a 'two-step' OTA package, where recovery is updated
first, so that any changes made to the system partition are done
using the new recovery (new kernel, etc.).
--block
Generate a block-based OTA if possible. Will fall back to a
file-based OTA if the target_files is older and doesn't support
block-based OTAs.
-b (--binary) <file>
Use the given binary as the update-binary in the output package,
instead of the binary in the build's target_files. Use for
development only.
"""
import sys
if sys.hexversion < 0x02070000:
print >> sys.stderr, "Python 2.7 or newer is required."
sys.exit(1)
import copy
import errno
import os
import re
import subprocess
import tempfile
import time
import zipfile
try:
from hashlib import sha1 as sha1
except ImportError:
from sha import sha as sha1
import common
import img_from_target_files
import edify_generator
import build_image
OPTIONS = common.OPTIONS
OPTIONS.package_key = None
OPTIONS.incremental_source = None
OPTIONS.require_verbatim = set()
OPTIONS.prohibit_verbatim = set(("system/build.prop",))
OPTIONS.patch_threshold = 0.95
OPTIONS.wipe_user_data = False
OPTIONS.omit_prereq = False
OPTIONS.extra_script = None
OPTIONS.aslr_mode = True
OPTIONS.worker_threads = 3
OPTIONS.two_step = False
OPTIONS.no_signing = False
OPTIONS.block_based = False
OPTIONS.updater_binary = None
OPTIONS.oem_source = None
def MostPopularKey(d, default):
"""Given a dict, return the key corresponding to the largest
value. Returns 'default' if the dict is empty."""
x = [(v, k) for (k, v) in d.iteritems()]
if not x: return default
x.sort()
return x[-1][1]
def IsSymlink(info):
"""Return true if the zipfile.ZipInfo object passed in represents a
symlink."""
return (info.external_attr >> 16) == 0120777
def IsRegular(info):
"""Return true if the zipfile.ZipInfo object passed in represents a
symlink."""
return (info.external_attr >> 28) == 010
def ClosestFileMatch(src, tgtfiles, existing):
"""Returns the closest file match between a source file and list
of potential matches. The exact filename match is preferred,
then the sha1 is searched for, and finally a file with the same
basename is evaluated. Rename support in the updater-binary is
required for the latter checks to be used."""
result = tgtfiles.get("path:" + src.name)
if result is not None:
return result
if not OPTIONS.target_info_dict.get("update_rename_support", False):
return None
if src.size < 1000:
return None
result = tgtfiles.get("sha1:" + src.sha1)
if result is not None and existing.get(result.name) is None:
return result
result = tgtfiles.get("file:" + src.name.split("/")[-1])
if result is not None and existing.get(result.name) is None:
return result
return None
class Item:
"""Items represent the metadata (user, group, mode) of files and
directories in the system image."""
ITEMS = {}
def __init__(self, name, dir=False):
self.name = name
self.uid = None
self.gid = None
self.mode = None
self.selabel = None
self.capabilities = None
self.dir = dir
if name:
self.parent = Item.Get(os.path.dirname(name), dir=True)
self.parent.children.append(self)
else:
self.parent = None
if dir:
self.children = []
def Dump(self, indent=0):
if self.uid is not None:
print "%s%s %d %d %o" % (" "*indent, self.name, self.uid, self.gid, self.mode)
else:
print "%s%s %s %s %s" % (" "*indent, self.name, self.uid, self.gid, self.mode)
if self.dir:
print "%s%s" % (" "*indent, self.descendants)
print "%s%s" % (" "*indent, self.best_subtree)
for i in self.children:
i.Dump(indent=indent+1)
@classmethod
def Get(cls, name, dir=False):
if name not in cls.ITEMS:
cls.ITEMS[name] = Item(name, dir=dir)
return cls.ITEMS[name]
@classmethod
def GetMetadata(cls, input_zip):
# The target_files contains a record of what the uid,
# gid, and mode are supposed to be.
output = input_zip.read("META/filesystem_config.txt")
for line in output.split("\n"):
if not line: continue
columns = line.split()
name, uid, gid, mode = columns[:4]
selabel = None
capabilities = None
# After the first 4 columns, there are a series of key=value
# pairs. Extract out the fields we care about.
for element in columns[4:]:
key, value = element.split("=")
if key == "selabel":
selabel = value
if key == "capabilities":
capabilities = value
i = cls.ITEMS.get(name, None)
if i is not None:
i.uid = int(uid)
i.gid = int(gid)
i.mode = int(mode, 8)
i.selabel = selabel
i.capabilities = capabilities
if i.dir:
i.children.sort(key=lambda i: i.name)
# set metadata for the files generated by this script.
i = cls.ITEMS.get("system/recovery-from-boot.p", None)
if i: i.uid, i.gid, i.mode, i.selabel, i.capabilities = 0, 0, 0644, None, None
i = cls.ITEMS.get("system/etc/install-recovery.sh", None)
if i: i.uid, i.gid, i.mode, i.selabel, i.capabilities = 0, 0, 0544, None, None
def CountChildMetadata(self):
"""Count up the (uid, gid, mode, selabel, capabilities) tuples for
all children and determine the best strategy for using set_perm_recursive and
set_perm to correctly chown/chmod all the files to their desired
values. Recursively calls itself for all descendants.
Returns a dict of {(uid, gid, dmode, fmode, selabel, capabilities): count} counting up
all descendants of this node. (dmode or fmode may be None.) Also
sets the best_subtree of each directory Item to the (uid, gid,
dmode, fmode, selabel, capabilities) tuple that will match the most
descendants of that Item.
"""
assert self.dir
d = self.descendants = {(self.uid, self.gid, self.mode, None, self.selabel, self.capabilities): 1}
for i in self.children:
if i.dir:
for k, v in i.CountChildMetadata().iteritems():
d[k] = d.get(k, 0) + v
else:
k = (i.uid, i.gid, None, i.mode, i.selabel, i.capabilities)
d[k] = d.get(k, 0) + 1
# Find the (uid, gid, dmode, fmode, selabel, capabilities)
# tuple that matches the most descendants.
# First, find the (uid, gid) pair that matches the most
# descendants.
ug = {}
for (uid, gid, _, _, _, _), count in d.iteritems():
ug[(uid, gid)] = ug.get((uid, gid), 0) + count
ug = MostPopularKey(ug, (0, 0))
# Now find the dmode, fmode, selabel, and capabilities that match
# the most descendants with that (uid, gid), and choose those.
best_dmode = (0, 0755)
best_fmode = (0, 0644)
best_selabel = (0, None)
best_capabilities = (0, None)
for k, count in d.iteritems():
if k[:2] != ug: continue
if k[2] is not None and count >= best_dmode[0]: best_dmode = (count, k[2])
if k[3] is not None and count >= best_fmode[0]: best_fmode = (count, k[3])
if k[4] is not None and count >= best_selabel[0]: best_selabel = (count, k[4])
if k[5] is not None and count >= best_capabilities[0]: best_capabilities = (count, k[5])
self.best_subtree = ug + (best_dmode[1], best_fmode[1], best_selabel[1], best_capabilities[1])
return d
def SetPermissions(self, script):
"""Append set_perm/set_perm_recursive commands to 'script' to
set all permissions, users, and groups for the tree of files
rooted at 'self'."""
self.CountChildMetadata()
def recurse(item, current):
# current is the (uid, gid, dmode, fmode, selabel, capabilities) tuple that the current
# item (and all its children) have already been set to. We only
# need to issue set_perm/set_perm_recursive commands if we're
# supposed to be something different.
if item.dir:
if current != item.best_subtree:
script.SetPermissionsRecursive("/"+item.name, *item.best_subtree)
current = item.best_subtree
if item.uid != current[0] or item.gid != current[1] or \
item.mode != current[2] or item.selabel != current[4] or \
item.capabilities != current[5]:
script.SetPermissions("/"+item.name, item.uid, item.gid,
item.mode, item.selabel, item.capabilities)
for i in item.children:
recurse(i, current)
else:
if item.uid != current[0] or item.gid != current[1] or \
item.mode != current[3] or item.selabel != current[4] or \
item.capabilities != current[5]:
script.SetPermissions("/"+item.name, item.uid, item.gid,
item.mode, item.selabel, item.capabilities)
recurse(self, (-1, -1, -1, -1, None, None))
def CopySystemFiles(input_zip, output_zip=None,
substitute=None):
"""Copies files underneath system/ in the input zip to the output
zip. Populates the Item class with their metadata, and returns a
list of symlinks. output_zip may be None, in which case the copy is
skipped (but the other side effects still happen). substitute is an
optional dict of {output filename: contents} to be output instead of
certain input files.
"""
symlinks = []
for info in input_zip.infolist():
if info.filename.startswith("SYSTEM/"):
basefilename = info.filename[7:]
if IsSymlink(info):
symlinks.append((input_zip.read(info.filename),
"/system/" + basefilename))
else:
info2 = copy.copy(info)
fn = info2.filename = "system/" + basefilename
if substitute and fn in substitute and substitute[fn] is None:
continue
if output_zip is not None:
if substitute and fn in substitute:
data = substitute[fn]
else:
data = input_zip.read(info.filename)
output_zip.writestr(info2, data)
if fn.endswith("/"):
Item.Get(fn[:-1], dir=True)
else:
Item.Get(fn, dir=False)
symlinks.sort()
return symlinks
def SignOutput(temp_zip_name, output_zip_name):
key_passwords = common.GetKeyPasswords([OPTIONS.package_key])
pw = key_passwords[OPTIONS.package_key]
common.SignFile(temp_zip_name, output_zip_name, OPTIONS.package_key, pw,
whole_file=True)
def AppendAssertions(script, info_dict, oem_dict = None):
oem_props = info_dict.get("oem_fingerprint_properties")
if oem_props is None:
device = GetBuildProp("ro.product.device", info_dict)
script.AssertDevice(device)
else:
if oem_dict is None:
raise common.ExternalError("No OEM file provided to answer expected assertions")
for prop in oem_props.split():
if oem_dict.get(prop) is None:
raise common.ExternalError("The OEM file is missing the property %s" % prop)
script.AssertOemProperty(prop, oem_dict.get(prop))
def HasRecoveryPatch(target_files_zip):
try:
target_files_zip.getinfo("SYSTEM/recovery-from-boot.p")
return True
except KeyError:
return False
def GetOemProperty(name, oem_props, oem_dict, info_dict):
if oem_props is not None and name in oem_props:
return oem_dict[name]
return GetBuildProp(name, info_dict)
def CalculateFingerprint(oem_props, oem_dict, info_dict):
if oem_props is None:
return GetBuildProp("ro.build.fingerprint", info_dict)
return "%s/%s/%s:%s" % (
GetOemProperty("ro.product.brand", oem_props, oem_dict, info_dict),
GetOemProperty("ro.product.name", oem_props, oem_dict, info_dict),
GetOemProperty("ro.product.device", oem_props, oem_dict, info_dict),
GetBuildProp("ro.build.thumbprint", info_dict))
def WriteFullOTAPackage(input_zip, output_zip):
# TODO: how to determine this? We don't know what version it will
# be installed on top of. For now, we expect the API just won't
# change very often.
script = edify_generator.EdifyGenerator(3, OPTIONS.info_dict)
oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties")
oem_dict = None
if oem_props is not None:
if OPTIONS.oem_source is None:
raise common.ExternalError("OEM source required for this build")
script.Mount("/oem")
oem_dict = common.LoadDictionaryFromLines(open(OPTIONS.oem_source).readlines())
metadata = {"post-build": CalculateFingerprint(
oem_props, oem_dict, OPTIONS.info_dict),
"pre-device": GetOemProperty("ro.product.device", oem_props, oem_dict,
OPTIONS.info_dict),
"post-timestamp": GetBuildProp("ro.build.date.utc",
OPTIONS.info_dict),
}
device_specific = common.DeviceSpecificParams(
input_zip=input_zip,
input_version=OPTIONS.info_dict["recovery_api_version"],
output_zip=output_zip,
script=script,
input_tmp=OPTIONS.input_tmp,
metadata=metadata,
info_dict=OPTIONS.info_dict)
has_recovery_patch = HasRecoveryPatch(input_zip)
block_based = OPTIONS.block_based and has_recovery_patch
if not OPTIONS.omit_prereq:
ts = GetBuildProp("ro.build.date.utc", OPTIONS.info_dict)
ts_text = GetBuildProp("ro.build.date", OPTIONS.info_dict)
script.AssertOlderBuild(ts, ts_text)
AppendAssertions(script, OPTIONS.info_dict, oem_dict)
device_specific.FullOTA_Assertions()
# Two-step package strategy (in chronological order, which is *not*
# the order in which the generated script has things):
#
# if stage is not "2/3" or "3/3":
# write recovery image to boot partition
# set stage to "2/3"
# reboot to boot partition and restart recovery
# else if stage is "2/3":
# write recovery image to recovery partition
# set stage to "3/3"
# reboot to recovery partition and restart recovery
# else:
# (stage must be "3/3")
# set stage to ""
# do normal full package installation:
# wipe and install system, boot image, etc.
# set up system to update recovery partition on first boot
# complete script normally (allow recovery to mark itself finished and reboot)
recovery_img = common.GetBootableImage("recovery.img", "recovery.img",
OPTIONS.input_tmp, "RECOVERY")
if OPTIONS.two_step:
if not OPTIONS.info_dict.get("multistage_support", None):
assert False, "two-step packages not supported by this build"
fs = OPTIONS.info_dict["fstab"]["/misc"]
assert fs.fs_type.upper() == "EMMC", \
"two-step packages only supported on devices with EMMC /misc partitions"
bcb_dev = {"bcb_dev": fs.device}
common.ZipWriteStr(output_zip, "recovery.img", recovery_img.data)
script.AppendExtra("""
if get_stage("%(bcb_dev)s", "stage") == "2/3" then
""" % bcb_dev)
script.WriteRawImage("/recovery", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "3/3");
reboot_now("%(bcb_dev)s", "recovery");
else if get_stage("%(bcb_dev)s", "stage") == "3/3" then
""" % bcb_dev)
device_specific.FullOTA_InstallBegin()
system_progress = 0.75
if OPTIONS.wipe_user_data:
system_progress -= 0.1
if "selinux_fc" in OPTIONS.info_dict:
WritePolicyConfig(OPTIONS.info_dict["selinux_fc"], output_zip)
script.ShowProgress(system_progress, 30)
if block_based:
mapdata, data = img_from_target_files.BuildSystem(
OPTIONS.input_tmp, OPTIONS.info_dict,
sparse=False, map_file=True)
common.ZipWriteStr(output_zip, "system.map", mapdata)
common.ZipWriteStr(output_zip, "system.muimg", data)
script.WipeBlockDevice("/system")
script.WriteRawImage("/system", "system.muimg", mapfn="system.map")
else:
script.FormatPartition("/system")
script.Mount("/system")
if not has_recovery_patch:
script.UnpackPackageDir("recovery", "/system")
script.UnpackPackageDir("system", "/system")
symlinks = CopySystemFiles(input_zip, output_zip)
script.MakeSymlinks(symlinks)
boot_img = common.GetBootableImage("boot.img", "boot.img",
OPTIONS.input_tmp, "BOOT")
if not block_based:
def output_sink(fn, data):
common.ZipWriteStr(output_zip, "recovery/" + fn, data)
Item.Get("system/" + fn, dir=False)
common.MakeRecoveryPatch(OPTIONS.input_tmp, output_sink,
recovery_img, boot_img)
Item.GetMetadata(input_zip)
Item.Get("system").SetPermissions(script)
common.CheckSize(boot_img.data, "boot.img", OPTIONS.info_dict)
common.ZipWriteStr(output_zip, "boot.img", boot_img.data)
script.ShowProgress(0.05, 5)
script.WriteRawImage("/boot", "boot.img")
script.ShowProgress(0.2, 10)
device_specific.FullOTA_InstallEnd()
if OPTIONS.extra_script is not None:
script.AppendExtra(OPTIONS.extra_script)
script.UnmountAll()
if OPTIONS.wipe_user_data:
script.ShowProgress(0.1, 10)
script.FormatPartition("/data")
if OPTIONS.two_step:
script.AppendExtra("""
set_stage("%(bcb_dev)s", "");
""" % bcb_dev)
script.AppendExtra("else\n")
script.WriteRawImage("/boot", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "2/3");
reboot_now("%(bcb_dev)s", "");
endif;
endif;
""" % bcb_dev)
script.AddToZip(input_zip, output_zip, input_path=OPTIONS.updater_binary)
WriteMetadata(metadata, output_zip)
def WritePolicyConfig(file_context, output_zip):
f = open(file_context, 'r');
basename = os.path.basename(file_context)
common.ZipWriteStr(output_zip, basename, f.read())
def WriteMetadata(metadata, output_zip):
common.ZipWriteStr(output_zip, "META-INF/com/android/metadata",
"".join(["%s=%s\n" % kv
for kv in sorted(metadata.iteritems())]))
def LoadSystemFiles(z):
"""Load all the files from SYSTEM/... in a given target-files
ZipFile, and return a dict of {filename: File object}."""
out = {}
for info in z.infolist():
if info.filename.startswith("SYSTEM/") and not IsSymlink(info):
basefilename = info.filename[7:]
fn = "system/" + basefilename
data = z.read(info.filename)
out[fn] = common.File(fn, data)
return out
def GetBuildProp(prop, info_dict):
"""Return the fingerprint of the build of a given target-files info_dict."""
try:
return info_dict.get("build.prop", {})[prop]
except KeyError:
raise common.ExternalError("couldn't find %s in build.prop" % (prop,))
def AddToKnownPaths(filename, known_paths):
if filename[-1] == "/":
return
dirs = filename.split("/")[:-1]
while len(dirs) > 0:
path = "/".join(dirs)
if path in known_paths:
break;
known_paths.add(path)
dirs.pop()
def WriteBlockIncrementalOTAPackage(target_zip, source_zip, output_zip):
source_version = OPTIONS.source_info_dict["recovery_api_version"]
target_version = OPTIONS.target_info_dict["recovery_api_version"]
if source_version == 0:
print ("WARNING: generating edify script for a source that "
"can't install it.")
script = edify_generator.EdifyGenerator(source_version,
OPTIONS.target_info_dict)
metadata = {"pre-device": GetBuildProp("ro.product.device",
OPTIONS.source_info_dict),
"post-timestamp": GetBuildProp("ro.build.date.utc",
OPTIONS.target_info_dict),
}
device_specific = common.DeviceSpecificParams(
source_zip=source_zip,
source_version=source_version,
target_zip=target_zip,
target_version=target_version,
output_zip=output_zip,
script=script,
metadata=metadata,
info_dict=OPTIONS.info_dict)
source_fp = GetBuildProp("ro.build.fingerprint", OPTIONS.source_info_dict)
target_fp = GetBuildProp("ro.build.fingerprint", OPTIONS.target_info_dict)
metadata["pre-build"] = source_fp
metadata["post-build"] = target_fp
source_boot = common.GetBootableImage(
"/tmp/boot.img", "boot.img", OPTIONS.source_tmp, "BOOT",
OPTIONS.source_info_dict)
target_boot = common.GetBootableImage(
"/tmp/boot.img", "boot.img", OPTIONS.target_tmp, "BOOT")
updating_boot = (not OPTIONS.two_step and
(source_boot.data != target_boot.data))
source_recovery = common.GetBootableImage(
"/tmp/recovery.img", "recovery.img", OPTIONS.source_tmp, "RECOVERY",
OPTIONS.source_info_dict)
target_recovery = common.GetBootableImage(
"/tmp/recovery.img", "recovery.img", OPTIONS.target_tmp, "RECOVERY")
updating_recovery = (source_recovery.data != target_recovery.data)
with tempfile.NamedTemporaryFile() as src_file:
with tempfile.NamedTemporaryFile() as tgt_file:
print "building source system image..."
src_file = tempfile.NamedTemporaryFile()
src_mapdata, src_data = img_from_target_files.BuildSystem(
OPTIONS.source_tmp, OPTIONS.source_info_dict,
sparse=False, map_file=True)
src_sys_sha1 = sha1(src_data).hexdigest()
print "source system sha1:", src_sys_sha1
src_file.write(src_data)
print "building target system image..."
tgt_file = tempfile.NamedTemporaryFile()
tgt_mapdata, tgt_data = img_from_target_files.BuildSystem(
OPTIONS.target_tmp, OPTIONS.target_info_dict,
sparse=False, map_file=True)
tgt_sys_sha1 = sha1(tgt_data).hexdigest()
print "target system sha1:", tgt_sys_sha1
tgt_sys_len = len(tgt_data)
tgt_file.write(tgt_data)
system_type, system_device = common.GetTypeAndDevice("/system", OPTIONS.info_dict)
system_patch = common.MakeSystemPatch(src_file, tgt_file)
TestBlockPatch(src_data, src_mapdata, system_patch.data, tgt_mapdata, tgt_sys_sha1)
src_data = None
tgt_data = None
system_patch.AddToZip(output_zip, compression=zipfile.ZIP_STORED)
src_mapfilename = system_patch.name + ".src.map"
common.ZipWriteStr(output_zip, src_mapfilename, src_mapdata)
tgt_mapfilename = system_patch.name + ".tgt.map"
common.ZipWriteStr(output_zip, tgt_mapfilename, tgt_mapdata)
oem_props = OPTIONS.target_info_dict.get("oem_fingerprint_properties")
oem_dict = None
if oem_props is not None:
if OPTIONS.oem_source is None:
raise common.ExternalError("OEM source required for this build")
script.Mount("/oem")
oem_dict = common.LoadDictionaryFromLines(open(OPTIONS.oem_source).readlines())
AppendAssertions(script, OPTIONS.target_info_dict, oem_dict)
device_specific.IncrementalOTA_Assertions()
# Two-step incremental package strategy (in chronological order,
# which is *not* the order in which the generated script has
# things):
#
# if stage is not "2/3" or "3/3":
# do verification on current system
# write recovery image to boot partition
# set stage to "2/3"
# reboot to boot partition and restart recovery
# else if stage is "2/3":
# write recovery image to recovery partition
# set stage to "3/3"
# reboot to recovery partition and restart recovery
# else:
# (stage must be "3/3")
# perform update:
# patch system files, etc.
# force full install of new boot image
# set up system to update recovery partition on first boot
# complete script normally (allow recovery to mark itself finished and reboot)
if OPTIONS.two_step:
if not OPTIONS.info_dict.get("multistage_support", None):
assert False, "two-step packages not supported by this build"
fs = OPTIONS.info_dict["fstab"]["/misc"]
assert fs.fs_type.upper() == "EMMC", \
"two-step packages only supported on devices with EMMC /misc partitions"
bcb_dev = {"bcb_dev": fs.device}
common.ZipWriteStr(output_zip, "recovery.img", target_recovery.data)
script.AppendExtra("""
if get_stage("%(bcb_dev)s", "stage") == "2/3" then
""" % bcb_dev)
script.AppendExtra("sleep(20);\n");
script.WriteRawImage("/recovery", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "3/3");
reboot_now("%(bcb_dev)s", "recovery");
else if get_stage("%(bcb_dev)s", "stage") != "3/3" then
""" % bcb_dev)
script.Print("Verifying current system...")
device_specific.IncrementalOTA_VerifyBegin()
if oem_props is None:
script.AssertSomeFingerprint(source_fp, target_fp)
else:
script.AssertSomeThumbprint(
GetBuildProp("ro.build.thumbprint", OPTIONS.target_info_dict),
GetBuildProp("ro.build.thumbprint", OPTIONS.source_info_dict))
if updating_boot:
d = common.Difference(target_boot, source_boot)
_, _, d = d.ComputePatch()
print "boot target: %d source: %d diff: %d" % (
target_boot.size, source_boot.size, len(d))
common.ZipWriteStr(output_zip, "patch/boot.img.p", d)
boot_type, boot_device = common.GetTypeAndDevice("/boot", OPTIONS.info_dict)
script.PatchCheck("%s:%s:%d:%s:%d:%s" %
(boot_type, boot_device,
source_boot.size, source_boot.sha1,
target_boot.size, target_boot.sha1))
device_specific.IncrementalOTA_VerifyEnd()
if OPTIONS.two_step:
script.WriteRawImage("/boot", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "2/3");
reboot_now("%(bcb_dev)s", "");
else
""" % bcb_dev)
script.Comment("---- start making changes here ----")
device_specific.IncrementalOTA_InstallBegin()
script.Print("Patching system image...")
script.Syspatch(system_device,
tgt_mapfilename, tgt_sys_sha1,
src_mapfilename, src_sys_sha1,
system_patch.name)
if OPTIONS.two_step:
common.ZipWriteStr(output_zip, "boot.img", target_boot.data)
script.WriteRawImage("/boot", "boot.img")
print "writing full boot image (forced by two-step mode)"
if not OPTIONS.two_step:
if updating_boot:
# Produce the boot image by applying a patch to the current
# contents of the boot partition, and write it back to the
# partition.
script.Print("Patching boot image...")
script.ApplyPatch("%s:%s:%d:%s:%d:%s"
% (boot_type, boot_device,
source_boot.size, source_boot.sha1,
target_boot.size, target_boot.sha1),
"-",
target_boot.size, target_boot.sha1,
source_boot.sha1, "patch/boot.img.p")
print "boot image changed; including."
else:
print "boot image unchanged; skipping."
# Do device-specific installation (eg, write radio image).
device_specific.IncrementalOTA_InstallEnd()
if OPTIONS.extra_script is not None:
script.AppendExtra(OPTIONS.extra_script)
if OPTIONS.wipe_user_data:
script.Print("Erasing user data...")
script.FormatPartition("/data")
if OPTIONS.two_step:
script.AppendExtra("""
set_stage("%(bcb_dev)s", "");
endif;
endif;
""" % bcb_dev)
script.SetProgress(1)
script.AddToZip(target_zip, output_zip, input_path=OPTIONS.updater_binary)
WriteMetadata(metadata, output_zip)
def ParseMap(map_str):
x = map_str.split()
assert int(x[0]) == 4096
assert int(x[1]) == len(x)-2
return int(x[0]), [int(i) for i in x[2:]]
def TestBlockPatch(src_muimg, src_map, patch_data, tgt_map, tgt_sha1):
src_blksize, src_regions = ParseMap(src_map)
tgt_blksize, tgt_regions = ParseMap(tgt_map)
with tempfile.NamedTemporaryFile() as src_file,\
tempfile.NamedTemporaryFile() as patch_file,\
tempfile.NamedTemporaryFile() as tgt_file,\
tempfile.NamedTemporaryFile() as src_map_file,\
tempfile.NamedTemporaryFile() as tgt_map_file:
src_total = sum(src_regions) * src_blksize
src_file.truncate(src_total)
p = 0
for i in range(0, len(src_regions), 2):
c, dc = src_regions[i:i+2]
src_file.write(src_muimg[p:(p+c*src_blksize)])
p += c*src_blksize
src_file.seek(dc*src_blksize, 1)
assert src_file.tell() == src_total
patch_file.write(patch_data)
tgt_total = sum(tgt_regions) * tgt_blksize
tgt_file.truncate(tgt_total)
src_map_file.write(src_map)
tgt_map_file.write(tgt_map)
src_file.flush()
src_map_file.flush()
patch_file.flush()
tgt_file.flush()
tgt_map_file.flush()
p = common.Run(["syspatch_host", src_file.name, src_map_file.name,
patch_file.name, tgt_file.name, tgt_map_file.name],
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
stdoutdata, _ = p.communicate()
if p.returncode != 0:
print stdoutdata
raise ValueError("failed to reconstruct target system image from patch")
h = sha1()
for i in range(0, len(tgt_regions), 2):
c, dc = tgt_regions[i:i+2]
h.update(tgt_file.read(c*tgt_blksize))
tgt_file.seek(dc*tgt_blksize, 1)
if h.hexdigest() != tgt_sha1:
raise ValueError("patch reconstructed incorrect target system image")
print "test of system image patch succeeded"
def WriteIncrementalOTAPackage(target_zip, source_zip, output_zip):
target_has_recovery_patch = HasRecoveryPatch(target_zip)
source_has_recovery_patch = HasRecoveryPatch(source_zip)
if (OPTIONS.block_based and
target_has_recovery_patch and
source_has_recovery_patch):
return WriteBlockIncrementalOTAPackage(target_zip, source_zip, output_zip)
source_version = OPTIONS.source_info_dict["recovery_api_version"]
target_version = OPTIONS.target_info_dict["recovery_api_version"]
if source_version == 0:
print ("WARNING: generating edify script for a source that "
"can't install it.")
script = edify_generator.EdifyGenerator(source_version,
OPTIONS.target_info_dict)
oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties")
oem_dict = None
if oem_props is not None:
if OPTIONS.oem_source is None:
raise common.ExternalError("OEM source required for this build")
script.Mount("/oem")
oem_dict = common.LoadDictionaryFromLines(open(OPTIONS.oem_source).readlines())
metadata = {"pre-device": GetOemProperty("ro.product.device", oem_props, oem_dict,
OPTIONS.source_info_dict),
"post-timestamp": GetBuildProp("ro.build.date.utc",
OPTIONS.target_info_dict),
}
device_specific = common.DeviceSpecificParams(
source_zip=source_zip,
source_version=source_version,
target_zip=target_zip,
target_version=target_version,
output_zip=output_zip,
script=script,
metadata=metadata,
info_dict=OPTIONS.info_dict)
print "Loading target..."
target_data = LoadSystemFiles(target_zip)
print "Loading source..."
source_data = LoadSystemFiles(source_zip)
verbatim_targets = []
patch_list = []
diffs = []
renames = {}
known_paths = set()
largest_source_size = 0
matching_file_cache = {}
for fn, sf in source_data.items():
assert fn == sf.name
matching_file_cache["path:" + fn] = sf
if fn in target_data.keys():
AddToKnownPaths(fn, known_paths)
# Only allow eligibility for filename/sha matching
# if there isn't a perfect path match.
if target_data.get(sf.name) is None:
matching_file_cache["file:" + fn.split("/")[-1]] = sf
matching_file_cache["sha:" + sf.sha1] = sf
for fn in sorted(target_data.keys()):
tf = target_data[fn]
assert fn == tf.name
sf = ClosestFileMatch(tf, matching_file_cache, renames)
if sf is not None and sf.name != tf.name:
print "File has moved from " + sf.name + " to " + tf.name
renames[sf.name] = tf
if sf is None or fn in OPTIONS.require_verbatim:
# This file should be included verbatim
if fn in OPTIONS.prohibit_verbatim:
raise common.ExternalError("\"%s\" must be sent verbatim" % (fn,))
print "send", fn, "verbatim"
tf.AddToZip(output_zip)
verbatim_targets.append((fn, tf.size))
if fn in target_data.keys():
AddToKnownPaths(fn, known_paths)
elif tf.sha1 != sf.sha1:
# File is different; consider sending as a patch
diffs.append(common.Difference(tf, sf))
else:
# Target file data identical to source (may still be renamed)
pass
common.ComputeDifferences(diffs)
for diff in diffs:
tf, sf, d = diff.GetPatch()
path = "/".join(tf.name.split("/")[:-1])
if d is None or len(d) > tf.size * OPTIONS.patch_threshold or \
path not in known_paths:
# patch is almost as big as the file; don't bother patching
# or a patch + rename cannot take place due to the target
# directory not existing
tf.AddToZip(output_zip)
verbatim_targets.append((tf.name, tf.size))
if sf.name in renames:
del renames[sf.name]
AddToKnownPaths(tf.name, known_paths)
else:
common.ZipWriteStr(output_zip, "patch/" + sf.name + ".p", d)
patch_list.append((tf, sf, tf.size, common.sha1(d).hexdigest()))
largest_source_size = max(largest_source_size, sf.size)
script.Mount("/system")
target_fp = CalculateFingerprint(oem_props, oem_dict, OPTIONS.target_info_dict)
source_fp = CalculateFingerprint(oem_props, oem_dict, OPTIONS.source_info_dict)
if oem_props is None:
script.AssertSomeFingerprint(source_fp, target_fp)
else:
script.AssertSomeThumbprint(
GetBuildProp("ro.build.thumbprint", OPTIONS.target_info_dict),
GetBuildProp("ro.build.thumbprint", OPTIONS.source_info_dict))
metadata["pre-build"] = source_fp
metadata["post-build"] = target_fp
source_boot = common.GetBootableImage(
"/tmp/boot.img", "boot.img", OPTIONS.source_tmp, "BOOT",
OPTIONS.source_info_dict)
target_boot = common.GetBootableImage(
"/tmp/boot.img", "boot.img", OPTIONS.target_tmp, "BOOT")
updating_boot = (not OPTIONS.two_step and
(source_boot.data != target_boot.data))
source_recovery = common.GetBootableImage(
"/tmp/recovery.img", "recovery.img", OPTIONS.source_tmp, "RECOVERY",
OPTIONS.source_info_dict)
target_recovery = common.GetBootableImage(
"/tmp/recovery.img", "recovery.img", OPTIONS.target_tmp, "RECOVERY")
updating_recovery = (source_recovery.data != target_recovery.data)
# Here's how we divide up the progress bar:
# 0.1 for verifying the start state (PatchCheck calls)
# 0.8 for applying patches (ApplyPatch calls)
# 0.1 for unpacking verbatim files, symlinking, and doing the
# device-specific commands.
AppendAssertions(script, OPTIONS.target_info_dict, oem_dict)
device_specific.IncrementalOTA_Assertions()
# Two-step incremental package strategy (in chronological order,
# which is *not* the order in which the generated script has
# things):
#
# if stage is not "2/3" or "3/3":
# do verification on current system
# write recovery image to boot partition
# set stage to "2/3"
# reboot to boot partition and restart recovery
# else if stage is "2/3":
# write recovery image to recovery partition
# set stage to "3/3"
# reboot to recovery partition and restart recovery
# else:
# (stage must be "3/3")
# perform update:
# patch system files, etc.
# force full install of new boot image
# set up system to update recovery partition on first boot
# complete script normally (allow recovery to mark itself finished and reboot)
if OPTIONS.two_step:
if not OPTIONS.info_dict.get("multistage_support", None):
assert False, "two-step packages not supported by this build"
fs = OPTIONS.info_dict["fstab"]["/misc"]
assert fs.fs_type.upper() == "EMMC", \
"two-step packages only supported on devices with EMMC /misc partitions"
bcb_dev = {"bcb_dev": fs.device}
common.ZipWriteStr(output_zip, "recovery.img", target_recovery.data)
script.AppendExtra("""
if get_stage("%(bcb_dev)s", "stage") == "2/3" then
""" % bcb_dev)
script.AppendExtra("sleep(20);\n");
script.WriteRawImage("/recovery", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "3/3");
reboot_now("%(bcb_dev)s", "recovery");
else if get_stage("%(bcb_dev)s", "stage") != "3/3" then
""" % bcb_dev)
script.Print("Verifying current system...")
device_specific.IncrementalOTA_VerifyBegin()
script.ShowProgress(0.1, 0)
so_far = 0
for tf, sf, size, patch_sha in patch_list:
if tf.name != sf.name:
script.SkipNextActionIfTargetExists(tf.name, tf.sha1)
script.PatchCheck("/"+sf.name, tf.sha1, sf.sha1)
so_far += sf.size
if updating_boot:
d = common.Difference(target_boot, source_boot)
_, _, d = d.ComputePatch()
print "boot target: %d source: %d diff: %d" % (
target_boot.size, source_boot.size, len(d))
common.ZipWriteStr(output_zip, "patch/boot.img.p", d)
boot_type, boot_device = common.GetTypeAndDevice("/boot", OPTIONS.info_dict)
script.PatchCheck("%s:%s:%d:%s:%d:%s" %
(boot_type, boot_device,
source_boot.size, source_boot.sha1,
target_boot.size, target_boot.sha1))
so_far += source_boot.size
if patch_list or updating_recovery or updating_boot:
script.CacheFreeSpaceCheck(largest_source_size)
device_specific.IncrementalOTA_VerifyEnd()
if OPTIONS.two_step:
script.WriteRawImage("/boot", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "2/3");
reboot_now("%(bcb_dev)s", "");
else
""" % bcb_dev)
script.Comment("---- start making changes here ----")
device_specific.IncrementalOTA_InstallBegin()
if OPTIONS.two_step:
common.ZipWriteStr(output_zip, "boot.img", target_boot.data)
script.WriteRawImage("/boot", "boot.img")
print "writing full boot image (forced by two-step mode)"
script.Print("Removing unneeded files...")
script.DeleteFiles(["/"+i[0] for i in verbatim_targets] +
["/"+i for i in sorted(source_data)
if i not in target_data and
i not in renames] +
["/system/recovery.img"])
script.ShowProgress(0.8, 0)
total_patch_size = float(sum([i[1].size for i in patch_list]) + 1)
if updating_boot:
total_patch_size += target_boot.size
so_far = 0
script.Print("Patching system files...")
deferred_patch_list = []
for item in patch_list:
tf, sf, size, _ = item
if tf.name == "system/build.prop":
deferred_patch_list.append(item)
continue
if (sf.name != tf.name):
script.SkipNextActionIfTargetExists(tf.name, tf.sha1)
script.ApplyPatch("/"+sf.name, "-", tf.size, tf.sha1, sf.sha1, "patch/"+sf.name+".p")
so_far += tf.size
script.SetProgress(so_far / total_patch_size)
if not OPTIONS.two_step:
if updating_boot:
# Produce the boot image by applying a patch to the current
# contents of the boot partition, and write it back to the
# partition.
script.Print("Patching boot image...")
script.ApplyPatch("%s:%s:%d:%s:%d:%s"
% (boot_type, boot_device,
source_boot.size, source_boot.sha1,
target_boot.size, target_boot.sha1),
"-",
target_boot.size, target_boot.sha1,
source_boot.sha1, "patch/boot.img.p")
so_far += target_boot.size
script.SetProgress(so_far / total_patch_size)
print "boot image changed; including."
else:
print "boot image unchanged; skipping."
if updating_recovery:
# Recovery is generated as a patch using both the boot image
# (which contains the same linux kernel as recovery) and the file
# /system/etc/recovery-resource.dat (which contains all the images
# used in the recovery UI) as sources. This lets us minimize the
# size of the patch, which must be included in every OTA package.
#
# For older builds where recovery-resource.dat is not present, we
# use only the boot image as the source.
if not target_has_recovery_patch:
def output_sink(fn, data):
common.ZipWriteStr(output_zip, "recovery/" + fn, data)
Item.Get("system/" + fn, dir=False)
common.MakeRecoveryPatch(OPTIONS.target_tmp, output_sink,
target_recovery, target_boot)
script.DeleteFiles(["/system/recovery-from-boot.p",
"/system/etc/install-recovery.sh"])
print "recovery image changed; including as patch from boot."
else:
print "recovery image unchanged; skipping."
script.ShowProgress(0.1, 10)
target_symlinks = CopySystemFiles(target_zip, None)
target_symlinks_d = dict([(i[1], i[0]) for i in target_symlinks])
temp_script = script.MakeTemporary()
Item.GetMetadata(target_zip)
Item.Get("system").SetPermissions(temp_script)
# Note that this call will mess up the tree of Items, so make sure
# we're done with it.
source_symlinks = CopySystemFiles(source_zip, None)
source_symlinks_d = dict([(i[1], i[0]) for i in source_symlinks])
# Delete all the symlinks in source that aren't in target. This
# needs to happen before verbatim files are unpacked, in case a
# symlink in the source is replaced by a real file in the target.
to_delete = []
for dest, link in source_symlinks:
if link not in target_symlinks_d:
to_delete.append(link)
script.DeleteFiles(to_delete)
if verbatim_targets:
script.Print("Unpacking new files...")
script.UnpackPackageDir("system", "/system")
if updating_recovery and not target_has_recovery_patch:
script.Print("Unpacking new recovery...")
script.UnpackPackageDir("recovery", "/system")
if len(renames) > 0:
script.Print("Renaming files...")
for src in renames:
print "Renaming " + src + " to " + renames[src].name
script.RenameFile(src, renames[src].name)
script.Print("Symlinks and permissions...")
# Create all the symlinks that don't already exist, or point to
# somewhere different than what we want. Delete each symlink before
# creating it, since the 'symlink' command won't overwrite.
to_create = []
for dest, link in target_symlinks:
if link in source_symlinks_d:
if dest != source_symlinks_d[link]:
to_create.append((dest, link))
else:
to_create.append((dest, link))
script.DeleteFiles([i[1] for i in to_create])
script.MakeSymlinks(to_create)
# Now that the symlinks are created, we can set all the
# permissions.
script.AppendScript(temp_script)
# Do device-specific installation (eg, write radio image).
device_specific.IncrementalOTA_InstallEnd()
if OPTIONS.extra_script is not None:
script.AppendExtra(OPTIONS.extra_script)
# Patch the build.prop file last, so if something fails but the
# device can still come up, it appears to be the old build and will
# get set the OTA package again to retry.
script.Print("Patching remaining system files...")
for item in deferred_patch_list:
tf, sf, size, _ = item
script.ApplyPatch("/"+sf.name, "-", tf.size, tf.sha1, sf.sha1, "patch/"+sf.name+".p")
script.SetPermissions("/system/build.prop", 0, 0, 0644, None, None)
if OPTIONS.wipe_user_data:
script.Print("Erasing user data...")
script.FormatPartition("/data")
if OPTIONS.two_step:
script.AppendExtra("""
set_stage("%(bcb_dev)s", "");
endif;
endif;
""" % bcb_dev)
script.AddToZip(target_zip, output_zip, input_path=OPTIONS.updater_binary)
WriteMetadata(metadata, output_zip)
def main(argv):
def option_handler(o, a):
if o == "--board_config":
pass # deprecated
elif o in ("-k", "--package_key"):
OPTIONS.package_key = a
elif o in ("-i", "--incremental_from"):
OPTIONS.incremental_source = a
elif o in ("-w", "--wipe_user_data"):
OPTIONS.wipe_user_data = True
elif o in ("-n", "--no_prereq"):
OPTIONS.omit_prereq = True
elif o in ("-o", "--oem_settings"):
OPTIONS.oem_source = a
elif o in ("-e", "--extra_script"):
OPTIONS.extra_script = a
elif o in ("-a", "--aslr_mode"):
if a in ("on", "On", "true", "True", "yes", "Yes"):
OPTIONS.aslr_mode = True
else:
OPTIONS.aslr_mode = False
elif o in ("--worker_threads"):
OPTIONS.worker_threads = int(a)
elif o in ("-2", "--two_step"):
OPTIONS.two_step = True
elif o == "--no_signing":
OPTIONS.no_signing = True
elif o == "--block":
OPTIONS.block_based = True
elif o in ("-b", "--binary"):
OPTIONS.updater_binary = a
else:
return False
return True
args = common.ParseOptions(argv, __doc__,
extra_opts="b:k:i:d:wne:a:2o:",
extra_long_opts=["board_config=",
"package_key=",
"incremental_from=",
"wipe_user_data",
"no_prereq",
"extra_script=",
"worker_threads=",
"aslr_mode=",
"two_step",
"no_signing",
"block",
"binary=",
"oem_settings=",
],
extra_option_handler=option_handler)
if len(args) != 2:
common.Usage(__doc__)
sys.exit(1)
if OPTIONS.extra_script is not None:
OPTIONS.extra_script = open(OPTIONS.extra_script).read()
print "unzipping target target-files..."
OPTIONS.input_tmp, input_zip = common.UnzipTemp(args[0])
OPTIONS.target_tmp = OPTIONS.input_tmp
OPTIONS.info_dict = common.LoadInfoDict(input_zip)
# If this image was originally labelled with SELinux contexts, make sure we
# also apply the labels in our new image. During building, the "file_contexts"
# is in the out/ directory tree, but for repacking from target-files.zip it's
# in the root directory of the ramdisk.
if "selinux_fc" in OPTIONS.info_dict:
OPTIONS.info_dict["selinux_fc"] = os.path.join(OPTIONS.input_tmp, "BOOT", "RAMDISK",
"file_contexts")
if OPTIONS.verbose:
print "--- target info ---"
common.DumpInfoDict(OPTIONS.info_dict)
# If the caller explicitly specified the device-specific extensions
# path via -s/--device_specific, use that. Otherwise, use
# META/releasetools.py if it is present in the target target_files.
# Otherwise, take the path of the file from 'tool_extensions' in the
# info dict and look for that in the local filesystem, relative to
# the current directory.
if OPTIONS.device_specific is None:
from_input = os.path.join(OPTIONS.input_tmp, "META", "releasetools.py")
if os.path.exists(from_input):
print "(using device-specific extensions from target_files)"
OPTIONS.device_specific = from_input
else:
OPTIONS.device_specific = OPTIONS.info_dict.get("tool_extensions", None)
if OPTIONS.device_specific is not None:
OPTIONS.device_specific = os.path.abspath(OPTIONS.device_specific)
if OPTIONS.no_signing:
output_zip = zipfile.ZipFile(args[1], "w", compression=zipfile.ZIP_DEFLATED)
else:
temp_zip_file = tempfile.NamedTemporaryFile()
output_zip = zipfile.ZipFile(temp_zip_file, "w",
compression=zipfile.ZIP_DEFLATED)
if OPTIONS.incremental_source is None:
WriteFullOTAPackage(input_zip, output_zip)
if OPTIONS.package_key is None:
OPTIONS.package_key = OPTIONS.info_dict.get(
"default_system_dev_certificate",
"build/target/product/security/testkey")
else:
print "unzipping source target-files..."
OPTIONS.source_tmp, source_zip = common.UnzipTemp(OPTIONS.incremental_source)
OPTIONS.target_info_dict = OPTIONS.info_dict
OPTIONS.source_info_dict = common.LoadInfoDict(source_zip)
if "selinux_fc" in OPTIONS.source_info_dict:
OPTIONS.source_info_dict["selinux_fc"] = os.path.join(OPTIONS.source_tmp, "BOOT", "RAMDISK",
"file_contexts")
if OPTIONS.package_key is None:
OPTIONS.package_key = OPTIONS.source_info_dict.get(
"default_system_dev_certificate",
"build/target/product/security/testkey")
if OPTIONS.verbose:
print "--- source info ---"
common.DumpInfoDict(OPTIONS.source_info_dict)
WriteIncrementalOTAPackage(input_zip, source_zip, output_zip)
output_zip.close()
if not OPTIONS.no_signing:
SignOutput(temp_zip_file.name, args[1])
temp_zip_file.close()
common.Cleanup()
print "done."
if __name__ == '__main__':
try:
common.CloseInheritedPipes()
main(sys.argv[1:])
except common.ExternalError, e:
print
print " ERROR: %s" % (e,)
print
sys.exit(1)
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