process.h

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * Process object
 */
 
#pragma once
 
#include <span>
#include <string>
#include <sys/types.h>
 
#include <libcamera/base/class.h>
#include <libcamera/base/signal.h>
#include <libcamera/base/unique_fd.h>
 
namespace libcamera {
 
class EventNotifier;
 
class Process final
{
public:
    enum ExitStatus {
        NotExited,
        NormalExit,
        SignalExit,
    };
 
    Process();
    ~Process();
 
    int start(const std::string &path,
          std::span<const std::string> args = {},
          std::span<const int> fds = {});
 
    ExitStatus exitStatus() const { return exitStatus_; }
    int exitCode() const { return exitCode_; }
 
    void kill();
 
    Signal<enum ExitStatus, int> finished;
 
private:
    LIBCAMERA_DISABLE_COPY_AND_MOVE(Process)
 
    void onPidfdNotify();
 
    pid_t pid_;
    enum ExitStatus exitStatus_;
    int exitCode_;
 
    UniqueFD pidfd_;
    std::unique_ptr<EventNotifier> pidfdNotify_;
};
 
} /* namespace libcamera */