c - Redirecting the output of a child process to local txt file in Win32 api

Question

I know how to do this in Linux, but I'm a bit lost when trying this with Win32... This is my best attempt so far, it compiles but the child process still prints to the terminal instead of the txt file.

The directory:

|__ parent.exe
|
|__ child.exe
|
|__ out.txt

The code:

    STARTUPINFO si;
    PROCESS_INFORMATION pi;
    DWORD status ; // used to receive the exit status
    SECURITY_ATTRIBUTES sa;
    // fill the attributes with zeros
    ZeroMemory(&si, sizeof(si));
    ZeroMemory(&pi, sizeof(pi));
    ZeroMemory(&sa, sizeof(sa));

    sa.nLength = sizeof(SECURITY_ATTRIBUTES);
    sa.bInheritHandle = TRUE;
    sa.lpSecurityDescriptor = NULL;
    HANDLE fh = CreateFile("./out.txt",
        GENERIC_WRITE,          // open for writing
        TRUE,                      // sharing okay
        &sa,                   // inherit OK
        OPEN_EXISTING,             // open existing file
        FILE_ATTRIBUTE_NORMAL,  // normal file
        NULL);
    si.hStdOutput = fh;
    si.cb = sizeof(si);

    CreateProcess(
        "./child.exe",
        NULL,
        NULL,
        NULL, 
        TRUE, // handles are inherited
        0,
        NULL,
        NULL,
        &si,
        &pi
    );
    
    WaitForSingleObject(pi.hProcess, INFINITE);
    CloseHandle(fh);

    // other code for handling the child process

Not sure if relevant but it's compiled with gcc (mingw)

question from:https://stackoverflow.com/questions/65866751/redirecting-the-output-of-a-child-process-to-local-txt-file-in-win32-api

Answer 1

Waitting for answers