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