check file opened or not?

**George2** · 04-02-2008

Hello everyone,

On Windows platform, which API could be used to check whether a file is opened (either by other thread or process or even the same thread) or not?

C++ is fine.

thanks in advance,
George

**matsp** · 04-02-2008

You can try to open the file with "NO sharing", then it will fail if some other process has the file open.

--
Mats

**George2** · 04-03-2008

Thanks Mats,

You mean ::OpenFile() with OF_SHARE_EXCLUSIVE?

Originally Posted by matsp

You can try to open the file with "NO sharing", then it will fail if some other process has the file open.

--
Mats

regards,
George

**Elysia** · 04-03-2008

ifstream is fine.

**George2** · 04-03-2008

Thanks Elysia,

You mean filebuf::sh_none?

Originally Posted by Elysia

ifstream is fine.

regards,
George

**Elysia** · 04-03-2008

ifstream::open with appropriate open protection constants, which I don't know what they're called or located.

**Anddos** · 04-03-2008

when you say a file do you mean a process or what , because your making it sound like a .txt file

**matsp** · 04-03-2008

Originally Posted by Anddos

when you say a file do you mean a process or what , because your making it sound like a .txt file

I think George2 is asking about files like .txt and such.

--
Mats

**George2** · 04-03-2008

Thanks Elysia,

What do you mean "what they're called or located"?

Originally Posted by Elysia

which I don't know what they're called or located.

Thanks Anddos,

I mean data files, like .txt or something. Any ideas to my original question?

Originally Posted by Anddos

when you say a file do you mean a process or what , because your making it sound like a .txt file

regards,
George

**George2** · 04-03-2008

Thanks Mats,

Right Mats!

Originally Posted by matsp

I think George2 is asking about files like .txt and such.

--
Mats

regards,
George

**Elysia** · 04-03-2008

Originally Posted by George2

Thanks Elysia,
What do you mean "what they're called or located"?

I mean I don't know how to call ifstream with appropriate arguments.

**George2** · 04-03-2008

Thanks Elysia,

So you mean you are not sure whether using filebuf::sh_none is correct?

Originally Posted by Elysia

I mean I don't know how to call ifstream with appropriate arguments.

regards,
George

**Elysia** · 04-03-2008

I don't know, but I doubt it. The class takes its arguments from ios_base.

**Anddos** · 04-03-2008

and to check if its open ?
i would check if the process notepad is open then use FindWindow to check is the string of the windowtext is matching your textfile description

**Elysia** · 04-03-2008

George wants to find out if the file is open, not if a process is open. And this doesn't just include Notepad. What you describe is a really horrible way of doing it.

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