Example: system_file_system_watcher

C++ example source code:

/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2022, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */

#include <mrpt/core/exceptions.h>
#include <mrpt/system/CFileSystemWatcher.h>

#include <chrono>
#include <cstdio>
#include <iostream>
#include <thread>

using namespace mrpt;
using namespace mrpt::system;
using namespace std;

// ------------------------------------------------------
//              TestWatch
// ------------------------------------------------------
void TestWatch()
{
    CFileSystemWatcher::TFileSystemChangeList lstChanges;
    CFileSystemWatcher::TFileSystemChangeList::iterator it;

    CFileSystemWatcher watch(".");

    printf("Watching directory '.'...\n Press any key to exit.\n");

    while (!mrpt::system::os::kbhit())
    {
        watch.getChanges(lstChanges);

        for (it = lstChanges.begin(); it != lstChanges.end(); it++)
        {
            cout << "changed: '" << it->path << "' ";
            if (it->isDir) cout << "isDir ";
            if (it->eventModified) cout << "modified ";
            if (it->eventCloseWrite) cout << "close_write ";
            if (it->eventDeleted) cout << "deleted ";
            if (it->eventMovedTo) cout << "moved_to ";
            if (it->eventMovedFrom) cout << "moved_from ";
            if (it->eventCreated) cout << "created ";
            if (it->eventAccessed) cout << "accessed";

            cout << endl;
        }

        std::this_thread::sleep_for(100ms);
    }
}

int main()
{
    try
    {
        TestWatch();
        return 0;
    }
    catch (const std::exception& e)
    {
        std::cerr << "MRPT error: " << mrpt::exception_to_str(e) << std::endl;
        return -1;
    }
}