remwharead/browser-plugins/webextension/native-wrapper/remwharead_wrapper.cpp

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/* This file is part of remwharead.
* Copyright © 2019 tastytea <tastytea@tastytea.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string>
#include <iostream>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <sys/wait.h>
using std::string;
using std::cin;
using std::cout;
using std::uint32_t;
using std::system;
string read_input();
void send_message(const string &message);
int launch(const string &args);
string read_input()
{
// Read message length.
uint32_t length;
char buffer[4];
cin.read(buffer, sizeof(uint32_t));
std::memcpy(&length, buffer, 4);
// Ignore quotes.
length -= 2;
cin.ignore(1);
// Read message.
string input;
char c;
for (; length > 0; --length)
{
cin.read(&c, 1);
input += c;
}
return input;
}
void send_message(const string &message)
{
const auto length = static_cast<uint32_t>(message.length() + 2);
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast) - Necessary.
cout.write(reinterpret_cast<const char*>(&length), sizeof(uint32_t));
cout << '"' << message << '"';
}
int launch(const string &args)
{
const string cmd = "remwharead " + args + " 2>/dev/null";
// NOLINTNEXTLINE(cert-env33-c) - We get the arguments in a string.
int ret = system(cmd.c_str());
if (WIFEXITED(ret)) // NOLINT(hicpp-signed-bitwise) - Necessary.
{
ret = WEXITSTATUS(ret); // NOLINT(hicpp-signed-bitwise) - Necessary.
}
return ret;
}
int main()
{
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const string args = read_input();
const int ret = launch(args);
if (ret == 0)
{
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send_message("Command successful.");
}
else
{
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send_message("Command failed with status: "
+ std::to_string(ret) + '.');
}
return ret;
}