How recognize Symbolic link files?

Question

I always used this solution to enumerate files and folders recursively. The code works very fine showing correct file/folder names to all found. But exists a trouble related to recognition of symbolic link files, making the linked solution fail, for example:

Like you can see on image above, these 3 files are symbolic link files pointing to dll files in some place. Then, executing the code mentioned will prints:

• api-ms-win-core-console-l1-1-0.dll

instead of

• api-ms-win-core-console-l1-1-0.symlink

Another similar case with some use of IoCreateFile() function. If this receive a wrong filename or objectattributes (still referring to code of linked answer), also will fail with a ntstatus error STATUS_OBJECT_PATH_NOT_FOUND or some other related to this trouble.

Then my question is:

Is threre some solution to recognize symbolic link files where the linked code that i had used could work (and also why not any other function like ZwOpenFile etc)?

Thanks in advance by any suggestion.

Edition:

Here is a code where IoCreateFile() function fails when a simbolic link is passed as filename:

#include <ntifs.h>
#include <ntddk.h>

HANDLE
MyIoOpenFile(
        IN PCWSTR FileName,
        IN ACCESS_MASK DesiredAccess,
        IN ULONG ShareAccess)
{
        NTSTATUS ntStatus;
        UNICODE_STRING uniFileName;
        OBJECT_ATTRIBUTES objectAttributes;
        HANDLE ntFileHandle;
        IO_STATUS_BLOCK ioStatus;
        
        if (KeGetCurrentIrql() > PASSIVE_LEVEL) {
            DbgPrint("KeGetCurrentIrql() > PASSIVE_LEVEL\n");
            return 0;
        }

        RtlInitUnicodeString(&uniFileName, FileName);
        InitializeObjectAttributes(&objectAttributes, &uniFileName,
                OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE, NULL, NULL);

        ntStatus = IoCreateFile(&ntFileHandle,
                DesiredAccess,
                &objectAttributes,
                &ioStatus,
                0,
                FILE_ATTRIBUTE_NORMAL,
                ShareAccess,
                FILE_OPEN,
                0,
                NULL,
                0,
                0,
                NULL,
                IO_NO_PARAMETER_CHECKING);

        if (!NT_SUCCESS(ntStatus)) {
                DbgPrint("IoCreateFile() error - 0x%X \n", ntStatus);
                return 0;
        }

        return ntFileHandle;
}

//---------------------------------------------------------------------------

HANDLE hFileHandle = MyIoOpenFile(L"\\??\\C:\\Full-Path-FileName-Here",
                FILE_READ_ATTRIBUTES,
                FILE_SHARE_READ);
               
if (hFileHandle != 0) {
    DbgPrint("hFileHandle: %08X\n", hFileHandle);
    ZwClose(hFileHandle);
}

Answer 1

From Microsoft docs:

FILE_ATTRIBUTE_REPARSE_POINT - A file or directory that has an associated reparse point, or a file that is a symbolic link.

So you can use GetFileAttributes to detect symbolic links:

LPCWSTR lpszFileName = /* get file name */;

if (GetFileAttributes(lpszFileName) & FILE_ATTRIBUTE_REPARSE_POINT)
{
    // Symbolic link
}

See comments for further information about error checks and kernel mode API