检测由其他进程使用的文件 [英] Detect file in use by other process

问题描述

在窗口等，我曾经使用一个技巧找出一个文件是目前正在使用（具体写）。

我使用打开文件进行写入，如果大多数likey失败，另一个进程正忙于访问它。

很抱歉，这些伎俩（使用C OPEN与独占锁写作）不能在我的Mac上工作。虽然我的curl在终端仍在写我的-fileBusy（）检查失败。

使用F_GETLK对fd执行fcnt调用也不会显示任何锁定。

我有机会检测文件是否被另一个进程使用？

侦听fsevents不能做，因为我的应用程序启动后，由其他应用程序/进程创建。

解决方案

Apple通过电子邮件确认以下链接中描述的解决方案是有效的解决方案， p>

详细资讯：
http://lists.apple.com/archives/cocoa-dev/2010/May/msg01455.html

On windows and such I used to use a trick to find out of a file is currently in use (written specifically).

I use to open the file for writing and if it failed most likey another process is busy accessing it.

Sadly these trick (using C OPEN with exclusive lock for writing) doesn't work on my Mac. While my curl in a terminal is still writing my -fileBusy() check fails.

fcnt call on the fd with F_GETLK doesn't reveal any locking as well.

Is there any chance for me to detect if a file is in use by another process?

Ps> listening for fsevents can't be done because my app launches after the is created by the other app / process.

解决方案

Apple confirmed via email that the solution described in the link below is a valid one and not considered a private API.

More information: http://lists.apple.com/archives/cocoa-dev/2010/May/msg01455.html

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