process.hpp

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/*
 *  Cypress -- C++ Neural Associative Memory Simulator
 *  Copyright (C) 2016  Andreas Stöckel
 *
 *  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, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  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/>.
 */

#ifndef CYPRESS_PROCESS_HPP
#define CYPRESS_PROCESS_HPP

#include <atomic>
#include <iosfwd>
#include <memory>
#include <string>
#include <tuple>
#include <vector>

namespace cypress {

class ProcessImpl;

class Process {
private:
    std::unique_ptr<ProcessImpl> impl;

public:
    static void generic_writer(Process &proc, std::istream &input);

    static void generic_pipe(std::istream &input, std::ostream &output);

    static void fd_input_pipe(int fd, std::ostream &output,
                              const std::atomic<bool> &done);

    Process(const std::string &cmd, const std::vector<std::string> &args,
            bool do_redirect = true);

    ~Process();

    std::istream &child_stdout();

    std::istream &child_stderr();

    std::ostream &child_stdin();

    void close_child_stdin();

    bool running();

    int exitcode();

    int wait();

    bool signal(int signal);

    static int exec(const std::string &cmd,
                    const std::vector<std::string> &args, std::ostream &cout,
                    std::ostream &cerr,
                    const std::string &input = std::string());

    static int exec(const std::string &cmd,
                    const std::vector<std::string> &args, std::istream &cin,
                    std::ostream &cout, std::ostream &cerr);

    static int exec_no_redirect(const std::string &cmd,
                                const std::vector<std::string> &args);

    static std::tuple<int, std::string, std::string> exec(
        const std::string &cmd, const std::vector<std::string> &args,
        const std::string &input = std::string());
};
}

#endif /* CYPRESS_PROCESS_HPP */