c8d446bcde
applypatch now takes patches as blob-valued arguments instead of just filenames, eliminating the need to unpack all patches to /tmp before starting to apply them. Revert the last change I made where sha1_check(read_file(...)) was substituted for apply_patch_check(...). apply_patch_check() knows to check /cache/saved.file if the original source file is missing or has a bad checksum, which is important if the device loses power or otherwise restarts during patching. Change-Id: Ia5b761474b0f809a5a5eed29455b1b145145699e
222 lines
8.1 KiB
Python
222 lines
8.1 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 os
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import common
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class AmendGenerator(object):
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"""Class to generate scripts in the 'amend' recovery script language
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used up through cupcake."""
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def __init__(self):
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self.script = ['assert compatible_with("0.2") == "true"']
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self.included_files = set()
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def MakeTemporary(self):
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"""Make a temporary script object whose commands can latter be
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appended to the parent script with AppendScript(). Used when the
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caller wants to generate script commands out-of-order."""
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x = AmendGenerator()
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x.script = []
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x.included_files = self.included_files
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return x
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@staticmethod
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def _FileRoot(fn):
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"""Convert a file path to the 'root' notation used by amend."""
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if fn.startswith("/system/"):
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return "SYSTEM:" + fn[8:]
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elif fn == "/system":
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return "SYSTEM:"
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elif fn.startswith("/tmp/"):
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return "CACHE:.." + fn
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else:
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raise ValueError("don't know root for \"%s\"" % (fn,))
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@staticmethod
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def _PartitionRoot(partition):
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"""Convert a partition name to the 'root' notation used by amend."""
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if partition == "userdata":
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return "DATA:"
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else:
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return partition.upper() + ":"
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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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self.included_files.update(other.included_files)
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def AssertSomeFingerprint(self, *fp):
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"""Assert that the current fingerprint is one of *fp."""
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x = [('file_contains("SYSTEM:build.prop", '
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'"ro.build.fingerprint=%s") == "true"') % i for i in fp]
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self.script.append("assert %s" % (" || ".join(x),))
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def AssertOlderBuild(self, timestamp):
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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("run_program PACKAGE:check_prereq %s" % (timestamp,))
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self.included_files.add("check_prereq")
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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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self.script.append('assert getprop("ro.product.device") == "%s" || '
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'getprop("ro.build.product") == "%s"' % (device, device))
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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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self.script.append("assert " +
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" || ".join(['getprop("ro.bootloader") == "%s"' % (b,)
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for b in bootloaders]))
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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."""
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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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"""Not implemented in amend."""
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pass
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def PatchCheck(self, filename, *sha1):
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"""Check that the given file (or MTD reference) has one of the
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given *sha1 hashes."""
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out = ["run_program PACKAGE:applypatch -c %s" % (filename,)]
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for i in sha1:
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out.append(" " + i)
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self.script.append("".join(out))
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self.included_files.add(("applypatch_static", "applypatch"))
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# Not quite right since we don't need to check /cache/saved.file on
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# failure, but shouldn't hurt.
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FileCheck = PatchCheck
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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.script.append("run_program PACKAGE:applypatch -s %d" % (amount,))
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self.included_files.add(("applypatch_static", "applypatch"))
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def Mount(self, kind, what, path):
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# no-op; amend uses it's 'roots' system to automatically mount
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# things when they're referred to
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pass
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def UnpackPackageDir(self, src, dst):
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"""Unpack a given directory from the OTA package into the given
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destination directory."""
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dst = self._FileRoot(dst)
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self.script.append("copy_dir PACKAGE:%s %s" % (src, dst))
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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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# no way to do this from amend; substitute a script comment instead
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self.Comment(message)
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def FormatPartition(self, partition):
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"""Format the given MTD partition."""
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self.script.append("format %s" % (self._PartitionRoot(partition),))
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def DeleteFiles(self, file_list):
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"""Delete all files in file_list."""
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line = []
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t = 0
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for i in file_list:
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i = self._FileRoot(i)
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line.append(i)
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t += len(i) + 1
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if t > 80:
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self.script.append("delete " + " ".join(line))
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line = []
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t = 0
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if line:
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self.script.append("delete " + " ".join(line))
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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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if len(patchpairs) % 2 != 0:
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raise ValueError("bad patches given to ApplyPatch")
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self.script.append(
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("run_program PACKAGE:applypatch %s %s %s %d " %
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(srcfile, tgtfile, tgtsha1, tgtsize)) +
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" ".join(["%s:%s" % patchpairs[i:i+2]
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for i in range(0, len(patchpairs), 2)]))
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self.included_files.add(("applypatch_static", "applypatch"))
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def WriteFirmwareImage(self, kind, fn):
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"""Arrange to update the given firmware image (kind must be
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"hboot" or "radio") when recovery finishes."""
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self.script.append("write_%s_image PACKAGE:%s" % (kind, fn))
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def WriteRawImage(self, partition, fn):
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"""Write the given file into the given MTD partition."""
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self.script.append("write_raw_image PACKAGE:%s %s" %
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(fn, self._PartitionRoot(partition)))
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def SetPermissions(self, fn, uid, gid, mode):
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"""Set file ownership and permissions."""
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fn = self._FileRoot(fn)
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self.script.append("set_perm %d %d 0%o %s" % (uid, gid, mode, fn))
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def SetPermissionsRecursive(self, fn, uid, gid, dmode, fmode):
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"""Recursively set path ownership and permissions."""
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fn = self._FileRoot(fn)
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self.script.append("set_perm_recursive %d %d 0%o 0%o %s" %
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(uid, gid, dmode, fmode, fn))
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def MakeSymlinks(self, symlink_list):
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"""Create symlinks, given a list of (dest, link) pairs."""
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self.DeleteFiles([i[1] for i in symlink_list])
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self.script.extend(["symlink %s %s" % (i[0], self._FileRoot(i[1]))
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for i in sorted(symlink_list)])
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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 UnmountAll(self):
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pass
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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 any ancillary binaries needed by the
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script. If input_path is not None, it will be used as a local
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path for binaries instead of input_zip."""
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common.ZipWriteStr(output_zip, "META-INF/com/google/android/update-script",
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"\n".join(self.script) + "\n")
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for i in self.included_files:
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if isinstance(i, tuple):
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sourcefn, targetfn = i
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else:
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sourcefn = i
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targetfn = i
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try:
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if input_path is None:
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data = input_zip.read(os.path.join("OTA/bin", sourcefn))
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else:
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data = open(os.path.join(input_path, sourcefn)).read()
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common.ZipWriteStr(output_zip, targetfn, data, perms=0755)
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except (IOError, KeyError), e:
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raise ExternalError("unable to include binary %s: %s" % (i, e))
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