[PATCH] msvcrt: Ignore inherited FDs with invalid handles in msvcrt_init_io().

[Piotr Caban]

Hi Paul,

The change in implementation looks good for me.

On 2/15/21 12:43 PM, Paul Gofman wrote:
> -static void test_file_inherit_child(const char* fd_s)
> +static void test_file_inherit_child(const char* fd_s, const char *handle_str)
>   {
> +    HANDLE handle_value;
>       int fd = atoi(fd_s);
> +    HANDLE *handle_ptr;
> +    unsigned int count;
>       char buffer[32];
> +    STARTUPINFOA si;
>       int ret;
>   
> -    ret =write(fd, "Success", 8);
> +    GetStartupInfoA(&si);
> +    count = *(unsigned *)si.lpReserved2;
> +    if (handle_str && count >= 2)
> +    {
> +        sscanf(handle_str, "%p", &handle_value);
> +        handle_ptr = (HANDLE *)(si.lpReserved2 + sizeof(unsigned) + count);
> +        ok(handle_value == handle_ptr[1], "Got unexpected handle %p.\n", handle_ptr[1]);
> +    }
> +
> +    count = min(count, (si.cbReserved2 - sizeof(unsigned)) / (sizeof(HANDLE) + 1));
count is never used after the last assignment. It probably makes sense 
to change the code to something like:
if (handle_str)
{
     HANDLE handle_value, handle_ptr;
     unsigned int count;
     STARTUPINFOA si;

     GetStartupInfoA(&si);
     count = *(unsigned int*)si.lpReserved2;
     ok(count == 3, "count = %u\n", count);

     sscanf(handle_str, "%p", &handle_value);
     ...

> -    /* test inherit block with larger size */
> -    handles[1] = CreateFileA( "fdopen.tst", GENERIC_READ|GENERIC_WRITE,
> -                              FILE_SHARE_READ | FILE_SHARE_WRITE, &sa, CREATE_ALWAYS, 0, NULL );
> +    /* test inherit block with invalid handle */
> +    handles[1] = INVALID_HANDLE_VALUE;
>       create_io_inherit_block( &startup, 3, handles );
> -    startup.cbReserved2 += 7;
> -    test_stdout_handle( &startup, cmdline, handles[1], TRUE, "large size block" );
> -    CloseHandle( handles[1] );
> -    DeleteFileA("fdopen.tst");
Is there any reason for removing the "test inherit block with larger 
size" test?

Thanks,
Piotr