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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>
#include <LibMain/Main.h>
#include <string.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
Vector<String> paths;
char const* 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(arguments);
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: {}", arguments.strings[0], algorithm);
exit(1);
}
if (paths.is_empty())
paths.append("-");
bool fail = false;
for (auto& path : paths) {
auto filepath = (path == "-") ? "/dev/stdin" : path;
auto file = Core::File::construct(filepath);
if (!file->open(Core::OpenMode::ReadOnly)) {
warnln("{}: {}: {}", arguments.strings[0], path, file->error_string());
fail = true;
continue;
}
struct stat st;
if (fstat(file->fd(), &st) < 0) {
warnln("{}: Failed to fstat {}: {}", arguments.strings[0], filepath, strerror(errno));
fail = true;
continue;
}
if (algorithm == "crc32") {
Crypto::Checksum::CRC32 crc32;
while (!file->eof() && !file->has_error())
crc32.update(file->read(PAGE_SIZE));
if (file->has_error()) {
warnln("{}: Failed to read {}: {}", arguments.strings[0], filepath, file->error_string());
fail = true;
continue;
}
outln("{:08x} {} {}", crc32.digest(), st.st_size, path);
} else if (algorithm == "adler32") {
Crypto::Checksum::Adler32 adler32;
while (!file->eof() && !file->has_error())
adler32.update(file->read(PAGE_SIZE));
if (file->has_error()) {
warnln("{}: Failed to read {}: {}", arguments.strings[0], filepath, file->error_string());
fail = true;
continue;
}
outln("{:08x} {} {}", adler32.digest(), st.st_size, path);
} else {
warnln("{}: Unknown checksum algorithm: {}", arguments.strings[0], algorithm);
exit(1);
}
}
return fail;
}
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