如何在C/C++中通知文件/目录更改,理想情况下使用POSIX

sudo apt-get install libinotify-dev

#include<iostream>
#include<string>
#include <unistd.h>
#include <sys/inotify.h>

int main() {
    // 创建inotify实例
    int fd = inotify_init();
    if (fd < 0) {
        std::cerr << "Error: inotify_init() failed"<< std::endl;
        return 1;
    }

    // 添加要监视的目录或文件
    std::string path = "/path/to/watch";
    int wd = inotify_add_watch(fd, path.c_str(), IN_MODIFY | IN_CREATE | IN_DELETE);
    if (wd < 0) {
        std::cerr << "Error: inotify_add_watch() failed"<< std::endl;
        return 1;
    }

    // 读取事件
    char buffer[sizeof(struct inotify_event) + NAME_MAX + 1] = {0};
    ssize_t length = read(fd, buffer, sizeof(buffer));
    if (length < 0) {
        std::cerr << "Error: read() failed"<< std::endl;
        return 1;
    }

    // 处理事件
    struct inotify_event *event = (struct inotify_event *)buffer;
    if (event->mask & IN_MODIFY) {
        std::cout << "File/directory modified: "<< event->name<< std::endl;
    } else if (event->mask & IN_CREATE) {
        std::cout << "File/directory created: "<< event->name<< std::endl;
    } else if (event->mask & IN_DELETE) {
        std::cout << "File/directory deleted: "<< event->name<< std::endl;
    }

    // 移除监视
    inotify_rm_watch(fd, wd);
    close(fd);

    return 0;
}