6924eb7d40
Incremental OTA generation was failing since the
function _CheckSecondTokenNotSlotSuffixed was in
broken state, this change fixes the same.
Bug: 160215626
Test: Incremental OTA now gets generated and applied
successfully a non-ab device.
Change-Id: Ifb3886396fe65dcdaeba16c568419b9fa084193d
(cherry picked from commit 52defe48d52a770c326f489357ab8877b211541e)
Merged-In: Ifb3886396fe65dcdaeba16c568419b9fa084193d
435 lines
17 KiB
Python
435 lines
17 KiB
Python
# Copyright (C) 2009 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import re
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import common
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class EdifyGenerator(object):
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"""Class to generate scripts in the 'edify' recovery script language
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used from donut onwards."""
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def __init__(self, version, info, fstab=None):
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self.script = []
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self.mounts = set()
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self._required_cache = 0
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self.version = version
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self.info = info
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if fstab is None:
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self.fstab = self.info.get("fstab", None)
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else:
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self.fstab = fstab
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@property
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def required_cache(self):
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"""Return the minimum cache size to apply the update."""
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return self._required_cache
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@staticmethod
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def WordWrap(cmd, linelen=80):
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"""'cmd' should be a function call with null characters after each
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parameter (eg, "somefun(foo,\0bar,\0baz)"). This function wraps cmd
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to a given line length, replacing nulls with spaces and/or newlines
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to format it nicely."""
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indent = cmd.index("(")+1
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out = []
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first = True
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x = re.compile("^(.{,%d})\0" % (linelen-indent,))
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while True:
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if not first:
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out.append(" " * indent)
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first = False
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m = x.search(cmd)
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if not m:
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parts = cmd.split("\0", 1)
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out.append(parts[0]+"\n")
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if len(parts) == 1:
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break
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else:
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cmd = parts[1]
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continue
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out.append(m.group(1)+"\n")
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cmd = cmd[m.end():]
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return "".join(out).replace("\0", " ").rstrip("\n")
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def AppendScript(self, other):
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"""Append the contents of another script (which should be created
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with temporary=True) to this one."""
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self.script.extend(other.script)
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def AssertOemProperty(self, name, values, oem_no_mount):
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"""Assert that a property on the OEM paritition matches allowed values."""
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if not name:
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raise ValueError("must specify an OEM property")
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if not values:
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raise ValueError("must specify the OEM value")
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if oem_no_mount:
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get_prop_command = 'getprop("%s")' % name
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else:
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get_prop_command = 'file_getprop("/oem/oem.prop", "%s")' % name
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cmd = ''
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for value in values:
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cmd += '%s == "%s" || ' % (get_prop_command, value)
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cmd += (
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'abort("E{code}: This package expects the value \\"{values}\\" for '
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'\\"{name}\\"; this has value \\"" + '
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'{get_prop_command} + "\\".");').format(
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code=common.ErrorCode.OEM_PROP_MISMATCH,
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get_prop_command=get_prop_command, name=name,
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values='\\" or \\"'.join(values))
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self.script.append(cmd)
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def AssertSomeFingerprint(self, *fp):
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"""Assert that the current recovery build fingerprint is one of *fp."""
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if not fp:
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raise ValueError("must specify some fingerprints")
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cmd = (' ||\n '.join([('getprop("ro.build.fingerprint") == "%s"') % i
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for i in fp]) +
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' ||\n abort("E%d: Package expects build fingerprint of %s; '
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'this device has " + getprop("ro.build.fingerprint") + ".");') % (
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common.ErrorCode.FINGERPRINT_MISMATCH, " or ".join(fp))
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self.script.append(cmd)
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def AssertSomeThumbprint(self, *fp):
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"""Assert that the current recovery build thumbprint is one of *fp."""
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if not fp:
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raise ValueError("must specify some thumbprints")
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cmd = (' ||\n '.join([('getprop("ro.build.thumbprint") == "%s"') % i
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for i in fp]) +
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' ||\n abort("E%d: Package expects build thumbprint of %s; this '
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'device has " + getprop("ro.build.thumbprint") + ".");') % (
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common.ErrorCode.THUMBPRINT_MISMATCH, " or ".join(fp))
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self.script.append(cmd)
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def AssertFingerprintOrThumbprint(self, fp, tp):
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"""Assert that the current recovery build fingerprint is fp, or thumbprint
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is tp."""
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cmd = ('getprop("ro.build.fingerprint") == "{fp}" ||\n'
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' getprop("ro.build.thumbprint") == "{tp}" ||\n'
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' abort("Package expects build fingerprint of {fp} or '
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'thumbprint of {tp}; this device has a fingerprint of " '
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'+ getprop("ro.build.fingerprint") + " and a thumbprint of " '
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'+ getprop("ro.build.thumbprint") + ".");').format(fp=fp, tp=tp)
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self.script.append(cmd)
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def AssertOlderBuild(self, timestamp, timestamp_text):
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"""Assert that the build on the device is older (or the same as)
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the given timestamp."""
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self.script.append(
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('(!less_than_int(%s, getprop("ro.build.date.utc"))) || '
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'abort("E%d: Can\'t install this package (%s) over newer '
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'build (" + getprop("ro.build.date") + ").");') % (
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timestamp, common.ErrorCode.OLDER_BUILD, timestamp_text))
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def AssertDevice(self, device):
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"""Assert that the device identifier is the given string."""
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cmd = ('getprop("ro.product.device") == "%s" || '
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'abort("E%d: This package is for \\"%s\\" devices; '
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'this is a \\"" + getprop("ro.product.device") + "\\".");') % (
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device, common.ErrorCode.DEVICE_MISMATCH, device)
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self.script.append(cmd)
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def AssertSomeBootloader(self, *bootloaders):
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"""Asert that the bootloader version is one of *bootloaders."""
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cmd = ("assert(" +
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" ||\0".join(['getprop("ro.bootloader") == "%s"' % (b,)
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for b in bootloaders]) +
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");")
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self.script.append(self.WordWrap(cmd))
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def ShowProgress(self, frac, dur):
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"""Update the progress bar, advancing it over 'frac' over the next
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'dur' seconds. 'dur' may be zero to advance it via SetProgress
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commands instead of by time."""
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self.script.append("show_progress(%f, %d);" % (frac, int(dur)))
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def SetProgress(self, frac):
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"""Set the position of the progress bar within the chunk defined
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by the most recent ShowProgress call. 'frac' should be in
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[0,1]."""
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self.script.append("set_progress(%f);" % (frac,))
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def PatchCheck(self, filename, *sha1): # pylint: disable=unused-argument
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"""Checks that the given partition has the desired checksum.
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The call to this function is being deprecated in favor of
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PatchPartitionCheck(). It will try to parse and handle the old format,
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unless the format is unknown.
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"""
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tokens = filename.split(':')
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assert len(tokens) == 6 and tokens[0] == 'EMMC', \
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"Failed to handle unknown format. Use PatchPartitionCheck() instead."
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source = '{}:{}:{}:{}'.format(tokens[0], tokens[1], tokens[2], tokens[3])
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target = '{}:{}:{}:{}'.format(tokens[0], tokens[1], tokens[4], tokens[5])
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self.PatchPartitionCheck(target, source)
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def PatchPartitionCheck(self, target, source):
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"""Checks whether updater can patch the given partitions.
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It checks the checksums of the given partitions. If none of them matches the
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expected checksum, updater will additionally look for a backup on /cache.
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"""
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self._CheckSecondTokenNotSlotSuffixed(target, "PatchPartitionExprCheck")
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self._CheckSecondTokenNotSlotSuffixed(source, "PatchPartitionExprCheck")
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self.PatchPartitionExprCheck('"%s"' % target, '"%s"' % source)
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def PatchPartitionExprCheck(self, target_expr, source_expr):
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"""Checks whether updater can patch the given partitions.
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It checks the checksums of the given partitions. If none of them matches the
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expected checksum, updater will additionally look for a backup on /cache.
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Args:
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target_expr: an Edify expression that serves as the target arg to
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patch_partition. Must be evaluated to a string in the form of
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foo:bar:baz:quux
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source_expr: an Edify expression that serves as the source arg to
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patch_partition. Must be evaluated to a string in the form of
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foo:bar:baz:quux
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"""
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self.script.append(self.WordWrap((
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'patch_partition_check({target},\0{source}) ||\n abort('
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'concat("E{code}: \\"",{target},"\\" or \\"",{source},"\\" has '
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'unexpected contents."));').format(
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target=target_expr,
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source=source_expr,
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code=common.ErrorCode.BAD_PATCH_FILE)))
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def CacheFreeSpaceCheck(self, amount):
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"""Check that there's at least 'amount' space that can be made
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available on /cache."""
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self._required_cache = max(self._required_cache, amount)
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self.script.append(('apply_patch_space(%d) || abort("E%d: Not enough free '
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'space on /cache to apply patches.");') % (
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amount,
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common.ErrorCode.INSUFFICIENT_CACHE_SPACE))
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def Mount(self, mount_point, mount_options_by_format=""):
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"""Mount the partition with the given mount_point.
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mount_options_by_format:
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[fs_type=option[,option]...[|fs_type=option[,option]...]...]
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where option is optname[=optvalue]
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E.g. ext4=barrier=1,nodelalloc,errors=panic|f2fs=errors=recover
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"""
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fstab = self.fstab
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if fstab:
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p = fstab[mount_point]
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mount_dict = {}
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if mount_options_by_format is not None:
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for option in mount_options_by_format.split("|"):
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if "=" in option:
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key, value = option.split("=", 1)
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mount_dict[key] = value
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mount_flags = mount_dict.get(p.fs_type, "")
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if p.context is not None:
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mount_flags = p.context + ("," + mount_flags if mount_flags else "")
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self.script.append('mount("%s", "%s", %s, "%s", "%s");' % (
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p.fs_type, common.PARTITION_TYPES[p.fs_type],
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self._GetSlotSuffixDeviceForEntry(p),
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p.mount_point, mount_flags))
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self.mounts.add(p.mount_point)
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def Comment(self, comment):
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"""Write a comment into the update script."""
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self.script.append("")
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for i in comment.split("\n"):
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self.script.append("# " + i)
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self.script.append("")
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def Print(self, message):
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"""Log a message to the screen (if the logs are visible)."""
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self.script.append('ui_print("%s");' % (message,))
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def TunePartition(self, partition, *options):
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fstab = self.fstab
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if fstab:
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p = fstab[partition]
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if p.fs_type not in ("ext2", "ext3", "ext4"):
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raise ValueError("Partition %s cannot be tuned\n" % (partition,))
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self.script.append(
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'tune2fs(' + "".join(['"%s", ' % (i,) for i in options]) +
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'%s) || abort("E%d: Failed to tune partition %s");' % (
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self._GetSlotSuffixDeviceForEntry(p),
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common.ErrorCode.TUNE_PARTITION_FAILURE, partition))
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def FormatPartition(self, partition):
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"""Format the given partition, specified by its mount point (eg,
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"/system")."""
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fstab = self.fstab
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if fstab:
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p = fstab[partition]
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self.script.append('format("%s", "%s", %s, "%s", "%s");' %
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(p.fs_type, common.PARTITION_TYPES[p.fs_type],
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self._GetSlotSuffixDeviceForEntry(p),
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p.length, p.mount_point))
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def WipeBlockDevice(self, partition):
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if partition not in ("/system", "/vendor"):
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raise ValueError(("WipeBlockDevice doesn't work on %s\n") % (partition,))
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fstab = self.fstab
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size = self.info.get(partition.lstrip("/") + "_size", None)
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device = self._GetSlotSuffixDeviceForEntry(fstab[partition])
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self.script.append('wipe_block_device(%s, %s);' % (device, size))
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def ApplyPatch(self, srcfile, tgtfile, tgtsize, tgtsha1, *patchpairs):
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"""Apply binary patches (in *patchpairs) to the given srcfile to
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produce tgtfile (which may be "-" to indicate overwriting the
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source file.
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This edify function is being deprecated in favor of PatchPartition(). It
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will try to redirect calls to PatchPartition() if possible. On unknown /
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invalid inputs, raises an exception.
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"""
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tokens = srcfile.split(':')
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assert (len(tokens) == 6 and tokens[0] == 'EMMC' and tgtfile == '-' and
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len(patchpairs) == 2), \
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"Failed to handle unknown format. Use PatchPartition() instead."
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# Also sanity check the args.
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assert tokens[3] == patchpairs[0], \
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"Found mismatching values for source SHA-1: {} vs {}".format(
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tokens[3], patchpairs[0])
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assert int(tokens[4]) == tgtsize, \
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"Found mismatching values for target size: {} vs {}".format(
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tokens[4], tgtsize)
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assert tokens[5] == tgtsha1, \
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"Found mismatching values for target SHA-1: {} vs {}".format(
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tokens[5], tgtsha1)
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source = '{}:{}:{}:{}'.format(tokens[0], tokens[1], tokens[2], tokens[3])
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target = '{}:{}:{}:{}'.format(tokens[0], tokens[1], tokens[4], tokens[5])
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patch = patchpairs[1]
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self.PatchPartition(target, source, patch)
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def PatchPartition(self, target, source, patch):
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"""
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Applies the patch to the source partition and writes it to target.
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Args:
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target: the target arg to patch_partition. Must be in the form of
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foo:bar:baz:quux
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source: the source arg to patch_partition. Must be in the form of
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foo:bar:baz:quux
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patch: the patch arg to patch_partition. Must be an unquoted string.
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"""
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self._CheckSecondTokenNotSlotSuffixed(target, "PatchPartitionExpr")
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self._CheckSecondTokenNotSlotSuffixed(source, "PatchPartitionExpr")
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self.PatchPartitionExpr('"%s"' % target, '"%s"' % source, '"%s"' % patch)
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def PatchPartitionExpr(self, target_expr, source_expr, patch_expr):
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"""
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Applies the patch to the source partition and writes it to target.
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Args:
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target_expr: an Edify expression that serves as the target arg to
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patch_partition. Must be evaluated to a string in the form of
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foo:bar:baz:quux
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source_expr: an Edify expression that serves as the source arg to
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patch_partition. Must be evaluated to a string in the form of
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foo:bar:baz:quux
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patch_expr: an Edify expression that serves as the patch arg to
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patch_partition. Must be evaluated to a string.
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"""
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self.script.append(self.WordWrap((
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'patch_partition({target},\0{source},\0'
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'package_extract_file({patch})) ||\n'
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' abort(concat('
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' "E{code}: Failed to apply patch to ",{source}));').format(
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target=target_expr,
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source=source_expr,
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patch=patch_expr,
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code=common.ErrorCode.APPLY_PATCH_FAILURE)))
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def _GetSlotSuffixDeviceForEntry(self, entry=None):
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"""
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Args:
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entry: the fstab entry of device "foo"
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Returns:
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An edify expression. Caller must not quote result.
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If foo is slot suffixed, it returns
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'add_slot_suffix("foo")'
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Otherwise it returns
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'"foo"' (quoted)
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"""
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assert entry is not None
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if entry.slotselect:
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return 'add_slot_suffix("%s")' % entry.device
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return '"%s"' % entry.device
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def _CheckSecondTokenNotSlotSuffixed(self, s, fn):
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lst = s.split(':')
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assert(len(lst) == 4), "{} does not contain 4 tokens".format(s)
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if self.fstab:
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entry = common.GetEntryForDevice(self.fstab, lst[1])
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if entry is not None:
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assert not entry.slotselect, \
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"Use %s because %s is slot suffixed" % (fn, lst[1])
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def WriteRawImage(self, mount_point, fn, mapfn=None):
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"""Write the given package file into the partition for the given
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mount point."""
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fstab = self.fstab
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if fstab:
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p = fstab[mount_point]
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partition_type = common.PARTITION_TYPES[p.fs_type]
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device = self._GetSlotSuffixDeviceForEntry(p)
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args = {'device': device, 'fn': fn}
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if partition_type == "EMMC":
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if mapfn:
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args["map"] = mapfn
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self.script.append(
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'package_extract_file("%(fn)s", %(device)s, "%(map)s");' % args)
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else:
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self.script.append(
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'package_extract_file("%(fn)s", %(device)s);' % args)
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else:
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raise ValueError(
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"don't know how to write \"%s\" partitions" % p.fs_type)
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def AppendExtra(self, extra):
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"""Append text verbatim to the output script."""
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self.script.append(extra)
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def Unmount(self, mount_point):
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self.script.append('unmount("%s");' % mount_point)
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self.mounts.remove(mount_point)
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def UnmountAll(self):
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for p in sorted(self.mounts):
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self.script.append('unmount("%s");' % (p,))
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self.mounts = set()
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def AddToZip(self, input_zip, output_zip, input_path=None):
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"""Write the accumulated script to the output_zip file. input_zip
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is used as the source for the 'updater' binary needed to run
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script. If input_path is not None, it will be used as a local
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path for the binary instead of input_zip."""
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self.UnmountAll()
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common.ZipWriteStr(output_zip, "META-INF/com/google/android/updater-script",
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"\n".join(self.script) + "\n")
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if input_path is None:
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data = input_zip.read("OTA/bin/updater")
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else:
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data = open(input_path, "rb").read()
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common.ZipWriteStr(output_zip, "META-INF/com/google/android/update-binary",
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data, perms=0o755)
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