Function Ext2Open

Ext2Mgr/enumDisk.cpp:1311–1397

}

NT::NTSTATUS
Ext2Open(
    PCHAR                   FileName,
    PHANDLE                 Handle,
    ULONG                   DesiredAccess
    )
{
    NT::IO_STATUS_BLOCK     iosb;
    NT::NTSTATUS            status;
    NT::ANSI_STRING         AnsiFilespec;
    NT::UNICODE_STRING      UnicodeFilespec;
    NT::OBJECT_ATTRIBUTES   ObjectAttributes;

    SHORT                   UnicodeName[MAX_PATH];
    CHAR                    AnsiName[MAX_PATH];
    USHORT                  NameLength = 0;

    memset(UnicodeName, 0, sizeof(SHORT) * MAX_PATH);
    memset(AnsiName, 0, sizeof(UCHAR) * MAX_PATH);

    NameLength = (USHORT)strlen(FileName);
    ASSERT(NameLength < MAX_PATH);

    if (FileName[0] == '\\')  {
        memmove(AnsiName, FileName, NameLength);
    } else {
        memmove(&AnsiName[0], "\\DosDevices\\", 12);
        memmove(&AnsiName[12], FileName, NameLength);
        NameLength += 12;
    }

    AnsiFilespec.MaximumLength = AnsiFilespec.Length = NameLength;
    AnsiFilespec.Buffer = AnsiName;

    UnicodeFilespec.MaximumLength = MAX_PATH * 2;
    UnicodeFilespec.Length = 0;
    UnicodeFilespec.Buffer = (PWSTR)UnicodeName;

    NT::RtlAnsiStringToUnicodeString(&UnicodeFilespec, &AnsiFilespec, FALSE);

    //
    // Setup the name in an object attributes structure.
    // Note that we create a name that is case INsensitive
    //

    ObjectAttributes.Length = sizeof(NT::OBJECT_ATTRIBUTES);
    ObjectAttributes.RootDirectory = NULL;
    ObjectAttributes.Attributes = 0; /*OBJ_CASE_INSENSITIVE;*/
    ObjectAttributes.ObjectName = &UnicodeFilespec;
    ObjectAttributes.SecurityDescriptor = NULL;
    ObjectAttributes.SecurityQualityOfService = NULL;

    //
    // Do the create.  In this particular case, we'll have the I/O Manager
    // make our write requests syncrhonous for our convenience.
    //
    status = NT::ZwCreateFile(
                Handle,                           // returned file handle