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/*
* Copyright (c) 2020, Andrés Vieira <anvieiravazquez@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Assertions.h>
#include <AK/NumberFormat.h>
#include <LibArchive/Zip.h>
#include <LibCompress/Deflate.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCore/MappedFile.h>
#include <sys/stat.h>
#include <unistd.h>
static bool unpack_zip_member(Archive::ZipMember zip_member, bool quiet)
{
if (zip_member.is_directory) {
if (mkdir(zip_member.name.characters(), 0755) < 0) {
perror("mkdir");
return false;
}
if (!quiet)
outln(" extracting: {}", zip_member.name);
return true;
}
auto new_file = Core::File::construct(zip_member.name);
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);
// TODO: verify CRC32s match!
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;
}
break;
}
case Archive::ZipCompressionMethod::Deflate: {
auto decompressed_data = Compress::DeflateDecompressor::decompress_all(zip_member.compressed_data);
if (!decompressed_data.has_value()) {
warnln("Failed decompressing file {}", zip_member.name);
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;
}
break;
}
default:
VERIFY_NOT_REACHED();
}
if (!new_file->close()) {
warnln("Can't close file {}: {}", zip_member.name, new_file->error_string());
return false;
}
return true;
}
int main(int argc, char** argv)
{
const char* path;
int map_size_limit = 32 * MiB;
bool quiet { false };
String output_directory_path;
Core::ArgsParser args_parser;
args_parser.add_option(map_size_limit, "Maximum chunk size to map", "map-size-limit", 0, "size");
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(path, "File to unzip", "path", Core::ArgsParser::Required::Yes);
args_parser.parse(argc, argv);
String zip_file_path { path };
struct stat st;
int rc = stat(zip_file_path.characters(), &st);
if (rc < 0) {
perror("stat");
return 1;
}
// 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.
if (st.st_size >= map_size_limit) {
warnln("unzip warning: Refusing to map file since it is larger than {}, pass '--map-size-limit {}' to get around this",
human_readable_size(map_size_limit).characters(),
round_up_to_power_of_two(st.st_size, 16));
return 1;
}
auto file_or_error = Core::MappedFile::map(zip_file_path);
if (file_or_error.is_error()) {
warnln("Failed to open {}: {}", zip_file_path, file_or_error.error());
return 1;
}
auto& mapped_file = *file_or_error.value();
if (!quiet)
warnln("Archive: {}", zip_file_path);
auto zip_file = Archive::Zip::try_create(mapped_file.bytes());
if (!zip_file.has_value()) {
warnln("Invalid zip file {}", zip_file_path);
return 1;
}
if (!output_directory_path.is_null()) {
rc = mkdir(output_directory_path.characters(), 0755);
if (rc < 0 && errno != EEXIST) {
perror("mkdir");
return 1;
}
rc = chdir(output_directory_path.characters());
if (rc < 0) {
perror("chdir");
return 1;
}
}
auto success = zip_file->for_each_member([&](auto zip_member) {
return unpack_zip_member(zip_member, quiet) ? IterationDecision::Continue : IterationDecision::Break;
});
return success ? 0 : 1;
}
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