Possible to test if file is open in another process?

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Chris - 26 Nov 2005 21:54 GMT

Is it possible to test if a file is open by another process?

I don't want to lock the file. I just want to know if another process has it
open for any reason.

I'm using JDK 1.4, so NIO is available. I couldn't find any methods that
would do it, though. The closest ones I could find had to do with creating a
FileLock on a channel. But that doesn't help.

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Marc E - 26 Nov 2005 22:20 GMT

maybe you could try renaming the file to itself. if the file is locked, it
should return false

> Is it possible to test if a file is open by another process?
>
[quoted text clipped - 4 lines]
> would do it, though. The closest ones I could find had to do with creating
> a FileLock on a channel. But that doesn't help.

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Chris Smith - 26 Nov 2005 22:30 GMT

> maybe you could try renaming the file to itself. if the file is locked, it
> should return false

No, that would depend on the operating system. Without cooperative
locking, there is no way to accomplish the requested task in a portable
way.

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Possible to test if file is open in another process?

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