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Utilities: Add cksum

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Brendan Coles 2021-04-24 09:46:30 +00:00 • committed by Linus Groh
parent e0188d27de
commit 0252563a4e
2 changed files with 64 additions and 0 deletions
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63
Userland/Utilities/cksum.cpp Normal file
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/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCrypto/Checksum/Adler32.h>
#include <LibCrypto/Checksum/CRC32.h>
int main(int argc, char** argv)
{
Vector<const char*> paths;
const char* opt_algorithm = nullptr;
Core::ArgsParser args_parser;
args_parser.add_option(opt_algorithm, "Checksum algorithm (default 'crc32', use 'list' to list available algorithms)", "algorithm", '\0', nullptr);
args_parser.add_positional_argument(paths, "File", "file", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
auto algorithm = (opt_algorithm == nullptr) ? "crc32" : String(opt_algorithm).to_lowercase();
auto available_algorithms = Vector<String> { "crc32", "adler32" };
if (algorithm == "list") {
outln("Available algorithms:");
for (auto& available_algorithm : available_algorithms) {
outln(available_algorithm);
}
exit(0);
}
if (!available_algorithms.contains_slow(algorithm)) {
warnln("{}: Unknown checksum algorithm: {}", argv[0], algorithm);
exit(1);
}
if (paths.is_empty())
paths.append("-");
bool fail = false;
for (auto& path : paths) {
auto file = Core::File::construct((StringView(path) == "-") ? "/dev/stdin" : path);
if (!file->open(Core::IODevice::ReadOnly)) {
warnln("{}: {}: {}", argv[0], path, file->error_string());
fail = true;
continue;
}
auto file_buffer = file->read_all();
auto bytes = file_buffer.bytes().size();
if (algorithm == "crc32") {
outln("{} {} {}", Crypto::Checksum::CRC32 { file_buffer.bytes() }.digest(), bytes, path);
} else if (algorithm == "adler32") {
outln("{} {} {}", Crypto::Checksum::Adler32 { file_buffer.bytes() }.digest(), bytes, path);
} else {
warnln("{}: Unknown checksum algorithm: {}", argv[0], algorithm);
exit(1);
}
}
return fail;
}