Process.h

// SPDX-License-Identifier: GPL-2.0-only

#pragma once

#include <filesystem>
#include <string>
#include <vector>

#include <sys/types.h>

namespace SlHelpers {

class Process {
public:
    enum Error {
        UnknownError,
        BusyError,
        PipeError,
        SpawnError,
        WaitPidError,
        ReadError,
        WriteError,
    };

    Process() : m_pid(-1), m_pipe{-1, -1}, m_signalled(false), m_exitStatus(0), m_lastError(""),
        m_lastErrorNo(UnknownError) {}
    ~Process();

    bool run(const std::filesystem::path &program, const std::vector<std::string> &args = {},
         std::string *out = nullptr);

    bool spawn(const std::filesystem::path &program, const std::vector<std::string> &args = {},
           bool captureStdout = false);

    bool readAll(std::string &out);

    int readPipe() const { return m_pipe[0]; }

    bool waitForFinished();

    bool kill(int sig);

    pid_t pid() const { return m_pid; }

    bool signalled() const { return m_signalled; }

    unsigned int exitStatus() const { return m_exitStatus; }

    const std::string &lastError() const { return m_lastError; }
    Error lastErrorNo() const { return m_lastErrorNo; }
private:
    void closePipe(const unsigned int &p);
    void setError(const Error &errNo, const std::string &error) {
        m_lastErrorNo = errNo;
        m_lastError = error;
    }

    pid_t m_pid;
    int m_pipe[2];
    bool m_signalled;
    unsigned int m_exitStatus;
    std::string m_lastError;
    Error m_lastErrorNo;
};

}