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/*
* Copyright (c) 2020, the SerenityOS developers.
* 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 <LibCompress/Gzip.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/FileStream.h>
#include <unistd.h>
static bool decompress_file(Buffered<Core::InputFileStream>& input_stream, Buffered<Core::OutputFileStream>& output_stream)
{
auto gzip_stream = Compress::GzipDecompressor { input_stream };
u8 buffer[4096];
while (!gzip_stream.has_any_error() && !gzip_stream.unreliable_eof()) {
const auto nread = gzip_stream.read({ buffer, sizeof(buffer) });
output_stream.write_or_error({ buffer, nread });
}
return !gzip_stream.handle_any_error();
}
int main(int argc, char** argv)
{
Vector<const char*> filenames;
bool keep_input_files { false };
bool write_to_stdout { false };
Core::ArgsParser args_parser;
args_parser.add_option(keep_input_files, "Keep (don't delete) input files", "keep", 'k');
args_parser.add_option(write_to_stdout, "Write to stdout, keep original files unchanged", "stdout", 'c');
args_parser.add_positional_argument(filenames, "File to decompress", "FILE");
args_parser.parse(argc, argv);
if (write_to_stdout)
keep_input_files = true;
for (String filename : filenames) {
if (!filename.ends_with(".gz"))
filename = String::formatted("{}.gz", filename);
const auto input_filename = filename;
const auto output_filename = filename.substring_view(0, filename.length() - 3);
auto input_stream_result = Core::InputFileStream::open_buffered(input_filename);
if (input_stream_result.is_error()) {
warnln("Failed opening input file for reading: {}", input_stream_result.error());
return 1;
}
auto success = false;
if (write_to_stdout) {
auto stdout = Core::OutputFileStream::stdout_buffered();
success = decompress_file(input_stream_result.value(), stdout);
} else {
auto output_stream_result = Core::OutputFileStream::open_buffered(output_filename);
if (output_stream_result.is_error()) {
warnln("Failed opening output file for writing: {}", output_stream_result.error());
return 1;
}
success = decompress_file(input_stream_result.value(), output_stream_result.value());
}
if (!success) {
warnln("Failed gzip decompressing input file");
return 1;
}
if (!keep_input_files) {
const auto retval = unlink(String { input_filename }.characters());
if (retval != 0) {
warnln("Failed removing input file");
return 1;
}
}
}
return 0;
}
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