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/*
* Copyright (c) 2020, Andrés Vieira <anvieiravazquez@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Assertions.h>
#include <AK/DOSPackedTime.h>
#include <AK/NumberFormat.h>
#include <AK/StringUtils.h>
#include <LibArchive/Zip.h>
#include <LibCompress/Deflate.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DeprecatedFile.h>
#include <LibCore/Directory.h>
#include <LibCore/MappedFile.h>
#include <LibCore/System.h>
#include <LibCrypto/Checksum/CRC32.h>
#include <sys/stat.h>
static ErrorOr<void> adjust_modification_time(Archive::ZipMember const& zip_member)
{
auto time = time_from_packed_dos(zip_member.modification_date, zip_member.modification_time);
auto seconds = static_cast<time_t>(time.to_seconds());
struct utimbuf buf {
.actime = seconds,
.modtime = seconds
};
return Core::System::utime(zip_member.name, buf);
}
static bool unpack_zip_member(Archive::ZipMember zip_member, bool quiet)
{
if (zip_member.is_directory) {
if (auto maybe_error = Core::System::mkdir(zip_member.name, 0755); maybe_error.is_error()) {
warnln("Failed to create directory '{}': {}", zip_member.name, maybe_error.error());
return false;
}
if (!quiet)
outln(" extracting: {}", zip_member.name);
return true;
}
MUST(Core::Directory::create(LexicalPath(zip_member.name.to_deprecated_string()).parent(), Core::Directory::CreateDirectories::Yes));
auto new_file = Core::DeprecatedFile::construct(zip_member.name.to_deprecated_string());
if (!new_file->open(Core::OpenMode::WriteOnly)) {
warnln("Can't write file {}: {}", zip_member.name, new_file->error_string());
return false;
}
if (!quiet)
outln(" extracting: {}", zip_member.name);
Crypto::Checksum::CRC32 checksum;
switch (zip_member.compression_method) {
case Archive::ZipCompressionMethod::Store: {
if (!new_file->write(zip_member.compressed_data.data(), zip_member.compressed_data.size())) {
warnln("Can't write file contents in {}: {}", zip_member.name, new_file->error_string());
return false;
}
checksum.update({ zip_member.compressed_data.data(), zip_member.compressed_data.size() });
break;
}
case Archive::ZipCompressionMethod::Deflate: {
auto decompressed_data = Compress::DeflateDecompressor::decompress_all(zip_member.compressed_data);
if (decompressed_data.is_error()) {
warnln("Failed decompressing file {}: {}", zip_member.name, decompressed_data.error());
return false;
}
if (decompressed_data.value().size() != zip_member.uncompressed_size) {
warnln("Failed decompressing file {}", zip_member.name);
return false;
}
if (!new_file->write(decompressed_data.value().data(), decompressed_data.value().size())) {
warnln("Can't write file contents in {}: {}", zip_member.name, new_file->error_string());
return false;
}
checksum.update({ decompressed_data.value().data(), decompressed_data.value().size() });
break;
}
default:
VERIFY_NOT_REACHED();
}
if (adjust_modification_time(zip_member).is_error()) {
warnln("Failed setting modification_time for file {}", zip_member.name);
return false;
}
if (!new_file->close()) {
warnln("Can't close file {}: {}", zip_member.name, new_file->error_string());
return false;
}
if (checksum.digest() != zip_member.crc32) {
warnln("Failed decompressing file {}: CRC32 mismatch", zip_member.name);
MUST(Core::DeprecatedFile::remove(zip_member.name, Core::DeprecatedFile::RecursionMode::Disallowed));
return false;
}
return true;
}
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
StringView zip_file_path;
bool quiet { false };
StringView output_directory_path;
Vector<StringView> file_filters;
Core::ArgsParser args_parser;
args_parser.add_option(output_directory_path, "Directory to receive the archive content", "output-directory", 'd', "path");
args_parser.add_option(quiet, "Be less verbose", "quiet", 'q');
args_parser.add_positional_argument(zip_file_path, "File to unzip", "path", Core::ArgsParser::Required::Yes);
args_parser.add_positional_argument(file_filters, "Files or filters in the archive to extract", "files", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
struct stat st = TRY(Core::System::stat(zip_file_path));
// FIXME: Map file chunk-by-chunk once we have mmap() with offset.
// This will require mapping some parts then unmapping them repeatedly,
// but it would be significantly faster and less syscall heavy than seek()/read() at every read.
RefPtr<Core::MappedFile> mapped_file;
ReadonlyBytes input_bytes;
if (st.st_size > 0) {
mapped_file = TRY(Core::MappedFile::map(zip_file_path));
input_bytes = mapped_file->bytes();
}
if (!quiet)
warnln("Archive: {}", zip_file_path);
auto zip_file = Archive::Zip::try_create(input_bytes);
if (!zip_file.has_value()) {
warnln("Invalid zip file {}", zip_file_path);
return 1;
}
if (!output_directory_path.is_null()) {
TRY(Core::Directory::create(output_directory_path, Core::Directory::CreateDirectories::Yes));
TRY(Core::System::chdir(output_directory_path));
}
Vector<Archive::ZipMember> zip_directories;
auto success = TRY(zip_file->for_each_member([&](auto zip_member) {
bool keep_file = false;
if (!file_filters.is_empty()) {
for (auto& filter : file_filters) {
// Convert underscore wildcards (usual unzip convention) to question marks (as used by StringUtils)
auto string_filter = filter.replace("_"sv, "?"sv, ReplaceMode::All);
if (zip_member.name.bytes_as_string_view().matches(string_filter, CaseSensitivity::CaseSensitive)) {
keep_file = true;
break;
}
}
} else {
keep_file = true;
}
if (keep_file) {
if (!unpack_zip_member(zip_member, quiet))
return IterationDecision::Break;
if (zip_member.is_directory)
zip_directories.append(zip_member);
}
return IterationDecision::Continue;
}));
if (!success) {
return 1;
}
for (auto& directory : zip_directories) {
if (adjust_modification_time(directory).is_error()) {
warnln("Failed setting modification time for directory {}", directory.name);
return 1;
}
}
return success ? 0 : 1;
}
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