OpenFileById

関数

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DLLKERNEL32.dll呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

// KERNEL32.dll
#include <windows.h>

HANDLE OpenFileById(
    HANDLE hVolumeHint,
    FILE_ID_DESCRIPTOR* lpFileId,
    DWORD dwDesiredAccess,
    FILE_SHARE_MODE dwShareMode,
    SECURITY_ATTRIBUTES* lpSecurityAttributes,   // optional
    FILE_FLAGS_AND_ATTRIBUTES dwFlagsAndAttributes
);

パラメーター

名前	型	方向
hVolumeHint	HANDLE	in
lpFileId	FILE_ID_DESCRIPTOR*	in
dwDesiredAccess	DWORD	in
dwShareMode	FILE_SHARE_MODE	in
lpSecurityAttributes	SECURITY_ATTRIBUTES*	inoptional
dwFlagsAndAttributes	FILE_FLAGS_AND_ATTRIBUTES	in

戻り値の型: HANDLE

各言語での呼び出し定義

// KERNEL32.dll
#include <windows.h>

HANDLE OpenFileById(
    HANDLE hVolumeHint,
    FILE_ID_DESCRIPTOR* lpFileId,
    DWORD dwDesiredAccess,
    FILE_SHARE_MODE dwShareMode,
    SECURITY_ATTRIBUTES* lpSecurityAttributes,   // optional
    FILE_FLAGS_AND_ATTRIBUTES dwFlagsAndAttributes
);

[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern IntPtr OpenFileById(
    IntPtr hVolumeHint,   // HANDLE
    IntPtr lpFileId,   // FILE_ID_DESCRIPTOR*
    uint dwDesiredAccess,   // DWORD
    uint dwShareMode,   // FILE_SHARE_MODE
    IntPtr lpSecurityAttributes,   // SECURITY_ATTRIBUTES* optional
    uint dwFlagsAndAttributes   // FILE_FLAGS_AND_ATTRIBUTES
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenFileById(
    hVolumeHint As IntPtr,   ' HANDLE
    lpFileId As IntPtr,   ' FILE_ID_DESCRIPTOR*
    dwDesiredAccess As UInteger,   ' DWORD
    dwShareMode As UInteger,   ' FILE_SHARE_MODE
    lpSecurityAttributes As IntPtr,   ' SECURITY_ATTRIBUTES* optional
    dwFlagsAndAttributes As UInteger   ' FILE_FLAGS_AND_ATTRIBUTES
) As IntPtr
End Function

' hVolumeHint : HANDLE
' lpFileId : FILE_ID_DESCRIPTOR*
' dwDesiredAccess : DWORD
' dwShareMode : FILE_SHARE_MODE
' lpSecurityAttributes : SECURITY_ATTRIBUTES* optional
' dwFlagsAndAttributes : FILE_FLAGS_AND_ATTRIBUTES
Declare PtrSafe Function OpenFileById Lib "kernel32" ( _
    ByVal hVolumeHint As LongPtr, _
    ByVal lpFileId As LongPtr, _
    ByVal dwDesiredAccess As Long, _
    ByVal dwShareMode As Long, _
    ByVal lpSecurityAttributes As LongPtr, _
    ByVal dwFlagsAndAttributes As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

OpenFileById = ctypes.windll.kernel32.OpenFileById
OpenFileById.restype = ctypes.c_void_p
OpenFileById.argtypes = [
    wintypes.HANDLE,  # hVolumeHint : HANDLE
    ctypes.c_void_p,  # lpFileId : FILE_ID_DESCRIPTOR*
    wintypes.DWORD,  # dwDesiredAccess : DWORD
    wintypes.DWORD,  # dwShareMode : FILE_SHARE_MODE
    ctypes.c_void_p,  # lpSecurityAttributes : SECURITY_ATTRIBUTES* optional
    wintypes.DWORD,  # dwFlagsAndAttributes : FILE_FLAGS_AND_ATTRIBUTES
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
OpenFileById = Fiddle::Function.new(
  lib['OpenFileById'],
  [
    Fiddle::TYPE_VOIDP,  # hVolumeHint : HANDLE
    Fiddle::TYPE_VOIDP,  # lpFileId : FILE_ID_DESCRIPTOR*
    -Fiddle::TYPE_INT,  # dwDesiredAccess : DWORD
    -Fiddle::TYPE_INT,  # dwShareMode : FILE_SHARE_MODE
    Fiddle::TYPE_VOIDP,  # lpSecurityAttributes : SECURITY_ATTRIBUTES* optional
    -Fiddle::TYPE_INT,  # dwFlagsAndAttributes : FILE_FLAGS_AND_ATTRIBUTES
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn OpenFileById(
        hVolumeHint: *mut core::ffi::c_void,  // HANDLE
        lpFileId: *mut FILE_ID_DESCRIPTOR,  // FILE_ID_DESCRIPTOR*
        dwDesiredAccess: u32,  // DWORD
        dwShareMode: u32,  // FILE_SHARE_MODE
        lpSecurityAttributes: *mut SECURITY_ATTRIBUTES,  // SECURITY_ATTRIBUTES* optional
        dwFlagsAndAttributes: u32  // FILE_FLAGS_AND_ATTRIBUTES
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern IntPtr OpenFileById(IntPtr hVolumeHint, IntPtr lpFileId, uint dwDesiredAccess, uint dwShareMode, IntPtr lpSecurityAttributes, uint dwFlagsAndAttributes);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_OpenFileById' -Namespace Win32 -PassThru
# $api::OpenFileById(hVolumeHint, lpFileId, dwDesiredAccess, dwShareMode, lpSecurityAttributes, dwFlagsAndAttributes)

#uselib "KERNEL32.dll"
#func global OpenFileById "OpenFileById" sptr, sptr, sptr, sptr, sptr, sptr
; OpenFileById hVolumeHint, varptr(lpFileId), dwDesiredAccess, dwShareMode, varptr(lpSecurityAttributes), dwFlagsAndAttributes   ; 戻り値は stat
; hVolumeHint : HANDLE -> "sptr"
; lpFileId : FILE_ID_DESCRIPTOR* -> "sptr"
; dwDesiredAccess : DWORD -> "sptr"
; dwShareMode : FILE_SHARE_MODE -> "sptr"
; lpSecurityAttributes : SECURITY_ATTRIBUTES* optional -> "sptr"
; dwFlagsAndAttributes : FILE_FLAGS_AND_ATTRIBUTES -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

出力引数:

#uselib "KERNEL32.dll"
#cfunc global OpenFileById "OpenFileById" sptr, var, int, int, var, int
; res = OpenFileById(hVolumeHint, lpFileId, dwDesiredAccess, dwShareMode, lpSecurityAttributes, dwFlagsAndAttributes)
; hVolumeHint : HANDLE -> "sptr"
; lpFileId : FILE_ID_DESCRIPTOR* -> "var"
; dwDesiredAccess : DWORD -> "int"
; dwShareMode : FILE_SHARE_MODE -> "int"
; lpSecurityAttributes : SECURITY_ATTRIBUTES* optional -> "var"
; dwFlagsAndAttributes : FILE_FLAGS_AND_ATTRIBUTES -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "KERNEL32.dll"
#cfunc global OpenFileById "OpenFileById" sptr, sptr, int, int, sptr, int
; res = OpenFileById(hVolumeHint, varptr(lpFileId), dwDesiredAccess, dwShareMode, varptr(lpSecurityAttributes), dwFlagsAndAttributes)
; hVolumeHint : HANDLE -> "sptr"
; lpFileId : FILE_ID_DESCRIPTOR* -> "sptr"
; dwDesiredAccess : DWORD -> "int"
; dwShareMode : FILE_SHARE_MODE -> "int"
; lpSecurityAttributes : SECURITY_ATTRIBUTES* optional -> "sptr"
; dwFlagsAndAttributes : FILE_FLAGS_AND_ATTRIBUTES -> "int"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; HANDLE OpenFileById(HANDLE hVolumeHint, FILE_ID_DESCRIPTOR* lpFileId, DWORD dwDesiredAccess, FILE_SHARE_MODE dwShareMode, SECURITY_ATTRIBUTES* lpSecurityAttributes, FILE_FLAGS_AND_ATTRIBUTES dwFlagsAndAttributes)
#uselib "KERNEL32.dll"
#cfunc global OpenFileById "OpenFileById" intptr, var, int, int, var, int
; res = OpenFileById(hVolumeHint, lpFileId, dwDesiredAccess, dwShareMode, lpSecurityAttributes, dwFlagsAndAttributes)
; hVolumeHint : HANDLE -> "intptr"
; lpFileId : FILE_ID_DESCRIPTOR* -> "var"
; dwDesiredAccess : DWORD -> "int"
; dwShareMode : FILE_SHARE_MODE -> "int"
; lpSecurityAttributes : SECURITY_ATTRIBUTES* optional -> "var"
; dwFlagsAndAttributes : FILE_FLAGS_AND_ATTRIBUTES -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; HANDLE OpenFileById(HANDLE hVolumeHint, FILE_ID_DESCRIPTOR* lpFileId, DWORD dwDesiredAccess, FILE_SHARE_MODE dwShareMode, SECURITY_ATTRIBUTES* lpSecurityAttributes, FILE_FLAGS_AND_ATTRIBUTES dwFlagsAndAttributes)
#uselib "KERNEL32.dll"
#cfunc global OpenFileById "OpenFileById" intptr, intptr, int, int, intptr, int
; res = OpenFileById(hVolumeHint, varptr(lpFileId), dwDesiredAccess, dwShareMode, varptr(lpSecurityAttributes), dwFlagsAndAttributes)
; hVolumeHint : HANDLE -> "intptr"
; lpFileId : FILE_ID_DESCRIPTOR* -> "intptr"
; dwDesiredAccess : DWORD -> "int"
; dwShareMode : FILE_SHARE_MODE -> "int"
; lpSecurityAttributes : SECURITY_ATTRIBUTES* optional -> "intptr"
; dwFlagsAndAttributes : FILE_FLAGS_AND_ATTRIBUTES -> "int"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procOpenFileById = kernel32.NewProc("OpenFileById")
)

// hVolumeHint (HANDLE), lpFileId (FILE_ID_DESCRIPTOR*), dwDesiredAccess (DWORD), dwShareMode (FILE_SHARE_MODE), lpSecurityAttributes (SECURITY_ATTRIBUTES* optional), dwFlagsAndAttributes (FILE_FLAGS_AND_ATTRIBUTES)
r1, _, err := procOpenFileById.Call(
	uintptr(hVolumeHint),
	uintptr(lpFileId),
	uintptr(dwDesiredAccess),
	uintptr(dwShareMode),
	uintptr(lpSecurityAttributes),
	uintptr(dwFlagsAndAttributes),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function OpenFileById(
  hVolumeHint: THandle;   // HANDLE
  lpFileId: Pointer;   // FILE_ID_DESCRIPTOR*
  dwDesiredAccess: DWORD;   // DWORD
  dwShareMode: DWORD;   // FILE_SHARE_MODE
  lpSecurityAttributes: Pointer;   // SECURITY_ATTRIBUTES* optional
  dwFlagsAndAttributes: DWORD   // FILE_FLAGS_AND_ATTRIBUTES
): THandle; stdcall;
  external 'KERNEL32.dll' name 'OpenFileById';

result := DllCall("KERNEL32\OpenFileById"
    , "Ptr", hVolumeHint   ; HANDLE
    , "Ptr", lpFileId   ; FILE_ID_DESCRIPTOR*
    , "UInt", dwDesiredAccess   ; DWORD
    , "UInt", dwShareMode   ; FILE_SHARE_MODE
    , "Ptr", lpSecurityAttributes   ; SECURITY_ATTRIBUTES* optional
    , "UInt", dwFlagsAndAttributes   ; FILE_FLAGS_AND_ATTRIBUTES
    , "Ptr")   ; return: HANDLE

●OpenFileById(hVolumeHint, lpFileId, dwDesiredAccess, dwShareMode, lpSecurityAttributes, dwFlagsAndAttributes) = DLL("KERNEL32.dll", "void* OpenFileById(void*, void*, dword, dword, void*, dword)")
# 呼び出し: OpenFileById(hVolumeHint, lpFileId, dwDesiredAccess, dwShareMode, lpSecurityAttributes, dwFlagsAndAttributes)
# hVolumeHint : HANDLE -> "void*"
# lpFileId : FILE_ID_DESCRIPTOR* -> "void*"
# dwDesiredAccess : DWORD -> "dword"
# dwShareMode : FILE_SHARE_MODE -> "dword"
# lpSecurityAttributes : SECURITY_ATTRIBUTES* optional -> "void*"
# dwFlagsAndAttributes : FILE_FLAGS_AND_ATTRIBUTES -> "dword"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。