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+/*
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+ * Copyright (c) 2021, Federico Guerinoni <guerinoni.federico@gmail.com>
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+ * All rights reserved.
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions are met:
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+ *
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+ * 1. Redistributions of source code must retain the above copyright notice, this
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+ * list of conditions and the following disclaimer.
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+ *
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+ * 2. Redistributions in binary form must reproduce the above copyright notice,
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+ * this list of conditions and the following disclaimer in the documentation
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+ * and/or other materials provided with the distribution.
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+ *
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+ */
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+
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+#include <AK/Vector.h>
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+#include <LibCore/ArgsParser.h>
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+#include <LibCore/File.h>
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+#include <unistd.h>
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+
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+void print_lines(const Vector<String>& vec);
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+
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+int main(int argc, char** argv)
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+{
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+ if (pledge("stdio rpath", nullptr) < 0) {
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+ perror("pledge");
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+ return 1;
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+ }
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+
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+ const char* path = nullptr;
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+ Core::ArgsParser args_parser;
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+ args_parser.set_general_help("Concatenate files or pipes to stdout, last line first.");
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+ args_parser.add_positional_argument(path, "File path", "path", Core::ArgsParser::Required::No);
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+ args_parser.parse(argc, argv);
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+
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+ RefPtr<Core::File> file;
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+ if (path == nullptr) {
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+ file = Core::File::standard_input();
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+ } else {
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+ auto file_or_error = Core::File::open(path, Core::File::ReadOnly);
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+ if (file_or_error.is_error()) {
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+ warnln("Failed to open {}: {}", path, file_or_error.error());
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+ return 1;
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+ }
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+ file = file_or_error.value();
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+ }
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+
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+ Vector<String> lines;
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+ while (file->can_read_line()) {
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+ auto line = file->read_line();
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+ lines.append(line);
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+ }
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+
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+ for (int i = lines.size() - 1; i >= 0; --i)
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+ outln("{}", lines[i]);
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+
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+ return 0;
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+}
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