Reading blacklist from a text file in C++

Question

I actually need my driver to read (line by line) some programs that are going to be blacklisted.

_T("bannedfile.exe") is where I actually need to put the blacklisted program.

How can I make _tcscmp read a text file, line by line?

(It makes a comparison between the host program that loads the driver, and the blacklisted one)

BOOL ProcessBlackList() {
    TCHAR modulename[MAX_PATH];
    GetModuleFileName(NULL, modulename, MAX_PATH);
    PathStripPath(modulename);
    if (_tcscmp(modulename, _T("bannedfile.exe")) != 1) {
        return 0;
    }
    else {
        return 0x2; 
    }   
}

Answer 1

Can't be done that way.

You should be able to use use getline to read the file line by line and then pass the lines to _tcscmp. Should work something like this:

wchar_t const name[] = L"bannedfile.exe";
std::wifstream file(name);

std::wstring line;
while (std::getline(file, line)
{
    if (_tcscmp(modulename, line.c_str()) == 0) {
        return TRUE; //module is in list
    }
}
return FALSE; // module is not in list

Lacking a copy of VS to test it at the moment.

If you run into unicode parsing problems because the file's encoding isn't quite what the defaults expect, give this a read: What is std::wifstream::getline doing to my wchar_t array? It's treated like a byte array after getline returns