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/*
* Copyright (c) 2020, Peter Elliott <pelliott@ualberta.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/LexicalPath.h>
#include <AK/Span.h>
#include <AK/Vector.h>
#include <LibCompress/Gzip.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DirIterator.h>
#include <LibCore/FileStream.h>
#include <LibTar/TarStream.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::IODevice::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;
Tar::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().file_name());
if (extract) {
Tar::TarFileStream file_stream = tar_stream.file_contents();
const Tar::Header& header = tar_stream.header();
switch (header.type_flag()) {
case Tar::NormalFile:
case Tar::AlternateNormalFile: {
int fd = open(String(header.file_name()).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 Tar::Directory: {
if (mkdir(String(header.file_name()).characters(), header.mode())) {
perror("mkdir");
return 1;
}
break;
}
default:
// FIXME: Implement other file types
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::IODevice::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;
Tar::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::IODevice::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 (const String& 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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