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/*
* Copyright (c) 2020, Peter Elliott <pelliott@ualberta.ca>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Assertions.h>
#include <AK/LexicalPath.h>
#include <AK/Span.h>
#include <AK/Vector.h>
#include <LibArchive/TarStream.h>
#include <LibCompress/Gzip.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DirIterator.h>
#include <LibCore/FileStream.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
constexpr size_t buffer_size = 4096;
int main(int argc, char** argv)
{
bool create = false;
bool extract = false;
bool list = false;
bool verbose = false;
bool gzip = false;
const char* archive_file = nullptr;
Vector<const char*> paths;
Core::ArgsParser args_parser;
args_parser.add_option(create, "Create archive", "create", 'c');
args_parser.add_option(extract, "Extract archive", "extract", 'x');
args_parser.add_option(list, "List contents", "list", 't');
args_parser.add_option(verbose, "Print paths", "verbose", 'v');
args_parser.add_option(gzip, "compress or uncompress file using gzip", "gzip", 'z');
args_parser.add_option(archive_file, "Archive file", "file", 'f', "FILE");
args_parser.add_positional_argument(paths, "Paths", "PATHS", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
if (create + extract + list != 1) {
warnln("exactly one of -c, -x, and -t can be used");
return 1;
}
if (list || extract) {
auto file = Core::File::standard_input();
if (archive_file) {
auto maybe_file = Core::File::open(archive_file, Core::OpenMode::ReadOnly);
if (maybe_file.is_error()) {
warnln("Core::File::open: {}", maybe_file.error());
return 1;
}
file = maybe_file.value();
}
Core::InputFileStream file_stream(file);
Compress::GzipDecompressor gzip_stream(file_stream);
InputStream& file_input_stream = file_stream;
InputStream& gzip_input_stream = gzip_stream;
Archive::TarInputStream tar_stream((gzip) ? gzip_input_stream : file_input_stream);
if (!tar_stream.valid()) {
warnln("the provided file is not a well-formatted ustar file");
return 1;
}
for (; !tar_stream.finished(); tar_stream.advance()) {
if (list || verbose)
outln("{}", tar_stream.header().filename());
if (extract) {
Archive::TarFileStream file_stream = tar_stream.file_contents();
const Archive::TarFileHeader& header = tar_stream.header();
switch (header.type_flag()) {
case Archive::TarFileType::NormalFile:
case Archive::TarFileType::AlternateNormalFile: {
int fd = open(String(header.filename()).characters(), O_CREAT | O_WRONLY, header.mode());
if (fd < 0) {
perror("open");
return 1;
}
Array<u8, buffer_size> buffer;
size_t nread;
while ((nread = file_stream.read(buffer)) > 0) {
if (write(fd, buffer.data(), nread) < 0) {
perror("write");
return 1;
}
}
close(fd);
break;
}
case Archive::TarFileType::Directory: {
if (mkdir(String(header.filename()).characters(), header.mode())) {
perror("mkdir");
return 1;
}
break;
}
case Archive::TarFileType::GlobalExtendedHeader: {
dbgln("ignoring global extended header: {}", header.filename());
break;
}
case Archive::TarFileType::ExtendedHeader: {
dbgln("ignoring extended header: {}", header.filename());
break;
}
default:
// FIXME: Implement other file types
warnln("file type '{}' of {} is not yet supported", (char)header.type_flag(), header.filename());
VERIFY_NOT_REACHED();
}
}
}
file_stream.close();
return 0;
}
if (create) {
if (paths.size() == 0) {
warnln("you must provide at least one path to be archived");
return 1;
}
auto file = Core::File::standard_output();
if (archive_file) {
auto maybe_file = Core::File::open(archive_file, Core::OpenMode::WriteOnly);
if (maybe_file.is_error()) {
warnln("Core::File::open: {}", maybe_file.error());
return 1;
}
file = maybe_file.value();
}
Core::OutputFileStream file_stream(file);
Compress::GzipCompressor gzip_stream(file_stream);
OutputStream& file_output_stream = file_stream;
OutputStream& gzip_output_stream = gzip_stream;
Archive::TarOutputStream tar_stream((gzip) ? gzip_output_stream : file_output_stream);
auto add_file = [&](String path) {
auto file = Core::File::construct(path);
if (!file->open(Core::OpenMode::ReadOnly)) {
warnln("Failed to open {}: {}", path, file->error_string());
return;
}
struct stat statbuf;
if (lstat(path.characters(), &statbuf) < 0) {
warnln("Failed stating {}", path);
return;
}
auto canonicalized_path = LexicalPath::canonicalized_path(path);
tar_stream.add_file(canonicalized_path, statbuf.st_mode, file->read_all());
if (verbose)
outln("{}", canonicalized_path);
};
auto add_directory = [&](String path, auto handle_directory) -> void {
struct stat statbuf;
if (lstat(path.characters(), &statbuf) < 0) {
warnln("Failed stating {}", path);
return;
}
auto canonicalized_path = LexicalPath::canonicalized_path(path);
tar_stream.add_directory(canonicalized_path, statbuf.st_mode);
if (verbose)
outln("{}", canonicalized_path);
Core::DirIterator it(path, Core::DirIterator::Flags::SkipParentAndBaseDir);
while (it.has_next()) {
auto child_path = it.next_full_path();
if (!Core::File::is_directory(child_path)) {
add_file(child_path);
} else {
handle_directory(child_path, handle_directory);
}
}
};
for (auto const& path : paths) {
if (Core::File::is_directory(path)) {
add_directory(path, add_directory);
} else {
add_file(path);
}
}
tar_stream.finish();
return 0;
}
return 0;
}
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