inotify

How to use inotify in C?

由 橙三吉。 提交于 2019-12-23 15:46:17
问题 I searched for questions related to inotify, and this one is somewhat different... I use the following code to monitor change of one file (not directory). In testing, the read() does return when I save the target file which means it works. But event->mask is 32768 which is not IN_MODIFY and name is empty. Another issue: it cannot monitor continuously. When I change the file the second time, it has no response. Thank you for the help! #include <sys/inotify.h> #include <unistd.h> #include

Premature IN_CLOSE_WRITE notification with pyinotify

由 拟墨画扇 提交于 2019-12-23 12:16:39
问题 I am experiencing the following situation: pyinotify monitors a file for IN_CLOSE_WRITE events I change something in the file and save it the event is triggered I read the file and see that it has no changes Having tinkered with this a little bit, I noticed that it works fine when I am debugging. I set a breakpoint on the line that reads the file, thus adding a little delay. After that - the file is read and the changes are there. So, it seems that adding a time.sleep(1) , or delaying

Do any POSIX functions or glibc extensions implement a breadth-first file tree walk?

由 只谈情不闲聊 提交于 2019-12-22 10:49:36
问题 I am writing a daemon that utilizes inotify to monitor file access and it is critical that I don't miss anything on a recursive search. I found this interesting idea and have begun to implement it. ftw() and ftw64() do not use a breadth-first algorithm, its more "pre-order". nftw() gives me the option of depth-first, but I'm worried about races in upper leaves. I'm hoping that I'm missing something, perhaps a GNU extension? Or am I just looking at implementing my own with type safe call backs

NodeJS Filesystem Watch throwing event twice or more often

由 跟風遠走 提交于 2019-12-22 10:45:03
问题 I'm watching the config files of my NodeJS server on Ubuntu using: for( var index in cfgFiles ) { fs.watch(cfgFiles[index], function(event, fileName) { logger.info("======> EVENT: " + event); updateConfigData(fileName); }); } So whenever I save a config file, the "change" event is received at least twice by the handler function for the same file name causing updateConfigData() to be executed multiple times. I experienced the same behavior when watching config files using C++/iNotify. Does

Linux: Triggering Shell Command On File Save

由 拟墨画扇 提交于 2019-12-22 08:46:30
问题 I want to automatically trigger a shell command when a file is modified. I think this can be accomplished in code by registering an inotify hook and call to system , however is there a higher level bash command that can accomplish this? 回答1: Try inotify-tools. I'm having problems copying the link (sorry), but there is a wiki on GitHub which yu should be able to find with G-search-engine. 回答2: I don't have a solution to your problem, but I've found this nice program that you might use the

Using inotify to keep track of all files in a system

由 生来就可爱ヽ(ⅴ＜●) 提交于 2019-12-22 08:18:33
问题 Question: Can inotify be used to reliably record files in a [linux] system? Details: I am attempting to use inotifywait to track users movements (currently using bash, but it has been suggested that I migrate to a scripting language). Ultimately I want to add new files to a database upon creation ( create , moved_from ), update existing rows in a database upon file modification ( modify , attrib , move_to ), and finally remove a row upon file deletion ( delete ). I am, however, running into

Can iNotify tell me where a monitored file is moved?

由 亡梦爱人 提交于 2019-12-21 20:58:58
问题 I want to monitor a file while it's moving in the system. Can iNotify tell me its new position whenever it's moves? 回答1: If you're watching both the directory the file was moved from, and the directory the file was moved to, then you will receive an IN_MOVED_FROM event on the source directory and an IN_MOVED_TO event on the target directory, both with the same cookie . You can then use the name fields of the two events to find out where the file was moved to and from. If you're only watching

浅谈数据同步实现rsync+inotify

由 ≯℡__Kan透↙ 提交于 2019-12-21 01:08:53
浅谈数据同步实现rsync+inotify ❎ 数据的实时同步介绍 ❎ 数据的实时同步实现 inotify 🌐 inotify的介绍 🌐 实现inotify软件： 🌐 inotify+rsync使用方式 🌐 实现inotify rsync 1️⃣ rsync基本概述 2️⃣ rsync工作模式 3️⃣ rsync 命令参数解释 4️⃣ rsync 后台服务模式-服务端配置 5️⃣ rsync 后台服务模式-客户端配置 6️⃣ rsync 客户端测试 ❎ 数据的实时同步介绍 在生产环境，有时会需要两台主机的特定目录实现实时同步。比如，将NFS共享目录的数据文件，自动实时同步到备份的服务器特定目录中 [外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-otpf9Hwj-1576839015411)(04.png)] 实时同步技术介绍 实现实时同步的方法 inotify + rsync 方式实现数据同步 sersync ：金山公司周洋在 inotify 软件基础上进行开发的，功能更加强大 工作原理： 要利用监控服务（inotify），监控同步数据服务器目录中信息的变化 发现目录中数据产生变化，就利用rsync服务推送到备份服务器上 ❎ 数据的实时同步实现 inotify 🌐 inotify的介绍 异步的文件系统事件监控机制，利用事件驱动机制

rsync+inotify实时同步

由 青春壹個敷衍的年華 提交于 2019-12-21 00:02:16
1 背景 在生产环境，有时会需要两台主机的特定目录实现实时同步。比如，将NFS共享目录的数据文件，自动实时同步到备份的服务器特定目录中 2 实时同步技术简介 2.1 实现实时同步的方法 inotify + rsync 方式实现数据同步 sersync ：金山公司周洋在 inotify 软件基础上进行开发的，功能更加强大 2.2 工作原理 1.需要利用监控服务（inotify），监控同步数据服务器目录中信息的变化 2.发现目录中的数据产生变化，就利用rsync服务推送到备份服务器上 2.3 inotify 异步的文件系统事件监控机制，利用事件驱动机制，而无须通过诸如cron等的轮询机制来获取事件，linux内核从2.6.13起支持 inotify，通过inotify可以监控文件系统中添加、删除，修改、移动等各种事件 [root@CentOS7-02 ~]#grep -i inotify /boot/config-3.10.0-1062.el7.x86_64 CONFIG_INOTIFY_USER=y 2.4 实现inotify的软件 inotify-tools sersync lrsyncd 2.5 inotify+rsync使用方式 inotify 对同步数据目录信息的监控 rsync 完成对数据的同步 利用脚本进行结合 3 实现inotify 3.1 前提条件，内核版本不能小于2

inotify - how to find out which user has modified file?

由 跟風遠走 提交于 2019-12-20 20:39:06
问题 I'm looking for guidance on how to find out which user has modified a particular file. While inotify is great to get notification when a particular file is touched, how do I figure out which user has modified that file? I can think of using lsof but I'm afraid that it may not be as "realtime" as I want and/or it might be too much of a tax on resources. By realtime, I mean that if a user simply executes a touch command on a file, by the time I run lsof on file, it may not be picked up by lsof
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