jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
3 * Copyright (c) 2022, Lucas Chollet <lucas.chollet@free.fr>
4 *
5 * SPDX-License-Identifier: BSD-2-Clause
6 */
7
8#include <AK/Vector.h>
9#include <LibCore/ArgsParser.h>
10#include <LibCore/File.h>
11#include <LibCore/System.h>
12#include <LibMain/Main.h>
13
14ErrorOr<int> serenity_main(Main::Arguments arguments)
15{
16 TRY(Core::System::pledge("stdio rpath"));
17
18 Vector<StringView> paths;
19
20 Core::ArgsParser args_parser;
21 args_parser.set_general_help("Concatenate files or pipes to stdout.");
22 args_parser.add_positional_argument(paths, "File path", "path", Core::ArgsParser::Required::No);
23 args_parser.parse(arguments);
24
25 if (paths.is_empty())
26 paths.append("-"sv);
27
28 Vector<NonnullOwnPtr<Core::File>> files;
29 TRY(files.try_ensure_capacity(paths.size()));
30
31 for (auto const& path : paths) {
32 if (auto result = Core::File::open_file_or_standard_stream(path, Core::File::OpenMode::Read); result.is_error())
33 warnln("Failed to open {}: {}", path, result.release_error());
34 else
35 files.unchecked_append(result.release_value());
36 }
37
38 TRY(Core::System::pledge("stdio"));
39
40 Array<u8, 32768> buffer;
41 for (auto const& file : files) {
42 while (!file->is_eof()) {
43 auto const buffer_span = TRY(file->read_some(buffer));
44 out("{:s}", buffer_span);
45 }
46 }
47
48 return files.size() != paths.size();
49}