136 lines
3.7 KiB
C++
136 lines
3.7 KiB
C++
/*
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* Copyright (C) 2008 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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*/
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#include "zip_archive.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <vector>
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#include "base/stringprintf.h"
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#include "base/unix_file/fd_file.h"
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namespace art {
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uint32_t ZipEntry::GetUncompressedLength() {
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return zip_entry_->uncompressed_length;
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}
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uint32_t ZipEntry::GetCrc32() {
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return zip_entry_->crc32;
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}
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ZipEntry::~ZipEntry() {
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delete zip_entry_;
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}
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bool ZipEntry::ExtractToFile(File& file, std::string* error_msg) {
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const int32_t error = ExtractEntryToFile(handle_, zip_entry_, file.Fd());
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if (error) {
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*error_msg = std::string(ErrorCodeString(error));
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return false;
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}
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return true;
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}
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MemMap* ZipEntry::ExtractToMemMap(const char* zip_filename, const char* entry_filename,
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std::string* error_msg) {
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std::string name(entry_filename);
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name += " extracted in memory from ";
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name += zip_filename;
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std::unique_ptr<MemMap> map(MemMap::MapAnonymous(name.c_str(),
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NULL, GetUncompressedLength(),
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PROT_READ | PROT_WRITE, false, error_msg));
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if (map.get() == nullptr) {
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DCHECK(!error_msg->empty());
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return nullptr;
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}
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const int32_t error = ExtractToMemory(handle_, zip_entry_,
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map->Begin(), map->Size());
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if (error) {
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*error_msg = std::string(ErrorCodeString(error));
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return nullptr;
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}
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return map.release();
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}
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static void SetCloseOnExec(int fd) {
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// This dance is more portable than Linux's O_CLOEXEC open(2) flag.
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int flags = fcntl(fd, F_GETFD);
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if (flags == -1) {
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PLOG(WARNING) << "fcntl(" << fd << ", F_GETFD) failed";
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return;
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}
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int rc = fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
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if (rc == -1) {
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PLOG(WARNING) << "fcntl(" << fd << ", F_SETFD, " << flags << ") failed";
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return;
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}
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}
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ZipArchive* ZipArchive::Open(const char* filename, std::string* error_msg) {
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DCHECK(filename != nullptr);
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ZipArchiveHandle handle;
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const int32_t error = OpenArchive(filename, &handle);
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if (error) {
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*error_msg = std::string(ErrorCodeString(error));
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CloseArchive(handle);
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return nullptr;
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}
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SetCloseOnExec(GetFileDescriptor(handle));
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return new ZipArchive(handle);
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}
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ZipArchive* ZipArchive::OpenFromFd(int fd, const char* filename, std::string* error_msg) {
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DCHECK(filename != nullptr);
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DCHECK_GT(fd, 0);
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ZipArchiveHandle handle;
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const int32_t error = OpenArchiveFd(fd, filename, &handle);
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if (error) {
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*error_msg = std::string(ErrorCodeString(error));
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CloseArchive(handle);
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return nullptr;
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}
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SetCloseOnExec(GetFileDescriptor(handle));
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return new ZipArchive(handle);
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}
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ZipEntry* ZipArchive::Find(const char* name, std::string* error_msg) const {
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DCHECK(name != nullptr);
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// Resist the urge to delete the space. <: is a bigraph sequence.
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std::unique_ptr< ::ZipEntry> zip_entry(new ::ZipEntry);
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const int32_t error = FindEntry(handle_, name, zip_entry.get());
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if (error) {
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*error_msg = std::string(ErrorCodeString(error));
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return nullptr;
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}
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return new ZipEntry(handle_, zip_entry.release());
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}
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} // namespace art
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