fstream & file sharing: How to do what you used to be able to do?

With .Net 2003, fstream.h disappeared and the open command went from three parameters to two.

How do I now open a file and deny other applications from accessing the file until I am done writing to it? I used to be able to do:

Code:

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fstream outf("somefile.txt",ios::app,filebuf::sh_none); 

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Is there another way to do this, or am I out of luck?

the fstream change was one of the hardest changes in .NET for me, as I use a lot of functionality from it.

Try this:

Code:

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#include <fstream>
using namespace std;

int main() {
ofstream test  //Initiate "test" handle
test.open("somefile.txt",ios::app,filebuf,sh_none);  //Open File
test << "Line Written to file";  //Write to file
test.close()  //Close handle
return 0;
}

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Code:

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#include <fstream>
using namespace std;

int main() {
ofstream test  //Initiate "test" handle
test.open("somefile.txt",ios::app,filebuf,sh_none);  //Open File
test << "Line Written to file";  //Write to file
test.close()  //Close handle
return 0;
}

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Are you sure of this code? I get a compile error:

error C2065: 'sh_none' : undeclared
error C2275: 'std::filebuf' : illegal use of this type as an expression.

hmmm... the include didn't come out, but it should be there

>Are you sure of this code? I get a compile error:

>error C2065: 'sh_none' : undeclared
>error C2275: 'std::filebuf' : illegal use of this type as an expression.

You should use: filebuf.sh_none if it doesn't accept sh_none.

That wouldn't compile either:

error C2039: 'sh_none' : is not a member of 'std::basic_filebuf<_Elem,_Traits>'

Here's a simple example --

Code:

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#include "stdafx.h"
#include <fstream>
#include "example.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

using namespace std;

CWinApp theApp;

int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
        int nRetCode = 0;

        if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
        {
                nRetCode = 1;
        }
        else
        {
                ofstream outf("test.txt",ios::out,filebuf.sh_none);
        }

        return nRetCode;
}

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