kurs_os_root

char usage[] = ""
"notify - print a name of changed object if something is is changed in a directory subtree.\n"
"version 2.00, 2011-06-08\n"
"(C) Dmitry Koterov (dmitry@koterov.ru)\n"
"dkLab RealSync project, http://en.dklab.ru/lib/dklab_realsync/\n\n"
"Usage:\n"
"  notify.exe <any-path-to-watch>\n"
;

#include <windows.h>
#include <stdio.h>
#include <cstdint>
#include <cassert>
#include <locale>

// EXE-file type.
#pragma comment(linker, "/SUBSYSTEM:console")

int main(int argc, char* argv[]) {
    setlocale(LC_ALL, "ru-RU");
    _wsetlocale(LC_ALL, L"ru-RU");

    if (!argv[1] || !*argv[1]) {
        fprintf(stderr, "%s", usage);
        ExitProcess(1);
    }

    char* path = argv[1];


    HANDLE file = CreateFile(path,
        FILE_LIST_DIRECTORY,
        FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
        NULL,
        OPEN_EXISTING,
        FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED,
        NULL);
    assert(file != INVALID_HANDLE_VALUE);
    OVERLAPPED overlapped;
    overlapped.hEvent = CreateEvent(NULL, FALSE, 0, NULL);

    uint8_t change_buf[1024];
    BOOL success = ReadDirectoryChangesW(
        file, change_buf, 1024, TRUE,
        FILE_NOTIFY_CHANGE_FILE_NAME |
        FILE_NOTIFY_CHANGE_DIR_NAME |
        FILE_NOTIFY_CHANGE_LAST_WRITE,
        NULL, &overlapped, NULL);

    while (true) {
        DWORD result = WaitForSingleObject(overlapped.hEvent, 0);

        if (result == WAIT_OBJECT_0) {
            DWORD bytes_transferred;
            GetOverlappedResult(file, &overlapped, &bytes_transferred, FALSE);

            FILE_NOTIFY_INFORMATION* event = (FILE_NOTIFY_INFORMATION*)change_buf;

            for (;;) {
                DWORD name_len = event->FileNameLength / sizeof(wchar_t);

                switch (event->Action) {
                case FILE_ACTION_ADDED: {
                    wprintf(L"       Added: %.*s\n", name_len, event->FileName);
                } break;

                case FILE_ACTION_REMOVED: {
                    wprintf(L"     Removed: %.*s\n", name_len, event->FileName);
                } break;

                case FILE_ACTION_MODIFIED: {
                    wprintf(L"    Modified: %.*s\n", name_len, event->FileName);
                } break;

                case FILE_ACTION_RENAMED_OLD_NAME: {
                    wprintf(L"Renamed from: %.*s\n", name_len, event->FileName);
                } break;

                case FILE_ACTION_RENAMED_NEW_NAME: {
                    wprintf(L"          to: %.*s\n", name_len, event->FileName);
                } break;

                default: {
                    printf("Unknown action!\n");
                } break;
                }

                // Are there more events to handle?
                if (event->NextEntryOffset) {
                    *((uint8_t**)&event) += event->NextEntryOffset;
                }
                else {
                    break;
                }
            }

            // Queue the next event
            BOOL success = ReadDirectoryChangesW(
                file, change_buf, 1024, TRUE,
                FILE_NOTIFY_CHANGE_FILE_NAME |
                FILE_NOTIFY_CHANGE_DIR_NAME |
                FILE_NOTIFY_CHANGE_LAST_WRITE,
                NULL, &overlapped, NULL);

        }

        // Do other loop stuff here...
    }
}