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https://github.com/SerenityOS/serenity
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029160fd27
This utility is actually a symlink to the gunzip utility. The gunzip utility is modified to enable writing to stdout when running through the zcat symlink, to emulate the same behavior on other OSes. In addition to that, the gunzip utility is now required on a default installation as it could be a vital utility under some conditions (for example, downloading source code in a tar.gz file).
56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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* Copyright (c) 2023, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCompress/Gzip.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/File.h>
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#include <LibCore/System.h>
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#include <LibMain/Main.h>
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#include <unistd.h>
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ErrorOr<int> serenity_main(Main::Arguments args)
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{
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Vector<StringView> filenames;
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bool keep_input_files { false };
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bool write_to_stdout { false };
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Core::ArgsParser args_parser;
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// NOTE: If the user run this program via the /bin/zcat symlink,
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// then emulate gzip decompression to stdout.
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if (args.argc > 0 && args.strings[0] == "zcat"sv) {
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write_to_stdout = true;
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} else {
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args_parser.add_option(keep_input_files, "Keep (don't delete) input files", "keep", 'k');
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args_parser.add_option(write_to_stdout, "Write to stdout, keep original files unchanged", "stdout", 'c');
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}
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args_parser.add_positional_argument(filenames, "File to decompress", "FILE");
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args_parser.parse(args);
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if (write_to_stdout)
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keep_input_files = true;
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for (auto filename : filenames) {
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DeprecatedString input_filename;
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DeprecatedString output_filename;
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if (filename.ends_with(".gz"sv)) {
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input_filename = filename;
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output_filename = filename.substring_view(0, filename.length() - 3);
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} else {
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input_filename = DeprecatedString::formatted("{}.gz", filename);
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output_filename = filename;
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}
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auto output_stream = write_to_stdout ? TRY(Core::File::standard_output()) : TRY(Core::File::open(output_filename, Core::File::OpenMode::Write));
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TRY(Compress::GzipDecompressor::decompress_file(input_filename, move(output_stream)));
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if (!keep_input_files)
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TRY(Core::System::unlink(input_filename));
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}
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return 0;
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}
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