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GetFileInformationByHandle

関数

ハンドルからファイルの各種情報を取得する。

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

シグネチャ

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

BOOL GetFileInformationByHandle(
    HANDLE hFile,
    BY_HANDLE_FILE_INFORMATION* lpFileInformation
);

パラメーター

名前	型	方向
hFile	HANDLE	in
lpFileInformation	BY_HANDLE_FILE_INFORMATION*	out

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL GetFileInformationByHandle(
    HANDLE hFile,
    BY_HANDLE_FILE_INFORMATION* lpFileInformation
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool GetFileInformationByHandle(
    IntPtr hFile,   // HANDLE
    IntPtr lpFileInformation   // BY_HANDLE_FILE_INFORMATION* out
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetFileInformationByHandle(
    hFile As IntPtr,   ' HANDLE
    lpFileInformation As IntPtr   ' BY_HANDLE_FILE_INFORMATION* out
) As Boolean
End Function

' hFile : HANDLE
' lpFileInformation : BY_HANDLE_FILE_INFORMATION* out
Declare PtrSafe Function GetFileInformationByHandle Lib "kernel32" ( _
    ByVal hFile As LongPtr, _
    ByVal lpFileInformation As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetFileInformationByHandle = ctypes.windll.kernel32.GetFileInformationByHandle
GetFileInformationByHandle.restype = wintypes.BOOL
GetFileInformationByHandle.argtypes = [
    wintypes.HANDLE,  # hFile : HANDLE
    ctypes.c_void_p,  # lpFileInformation : BY_HANDLE_FILE_INFORMATION* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetFileInformationByHandle = Fiddle::Function.new(
  lib['GetFileInformationByHandle'],
  [
    Fiddle::TYPE_VOIDP,  # hFile : HANDLE
    Fiddle::TYPE_VOIDP,  # lpFileInformation : BY_HANDLE_FILE_INFORMATION* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetFileInformationByHandle(
        hFile: *mut core::ffi::c_void,  // HANDLE
        lpFileInformation: *mut BY_HANDLE_FILE_INFORMATION  // BY_HANDLE_FILE_INFORMATION* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool GetFileInformationByHandle(IntPtr hFile, IntPtr lpFileInformation);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetFileInformationByHandle' -Namespace Win32 -PassThru
# $api::GetFileInformationByHandle(hFile, lpFileInformation)

#uselib "KERNEL32.dll"
#func global GetFileInformationByHandle "GetFileInformationByHandle" sptr, sptr
; GetFileInformationByHandle hFile, varptr(lpFileInformation)   ; 戻り値は stat
; hFile : HANDLE -> "sptr"
; lpFileInformation : BY_HANDLE_FILE_INFORMATION* out -> "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 GetFileInformationByHandle "GetFileInformationByHandle" sptr, var
; res = GetFileInformationByHandle(hFile, lpFileInformation)
; hFile : HANDLE -> "sptr"
; lpFileInformation : BY_HANDLE_FILE_INFORMATION* out -> "var"
; ※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 GetFileInformationByHandle "GetFileInformationByHandle" sptr, sptr
; res = GetFileInformationByHandle(hFile, varptr(lpFileInformation))
; hFile : HANDLE -> "sptr"
; lpFileInformation : BY_HANDLE_FILE_INFORMATION* out -> "sptr"
; ※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:

; BOOL GetFileInformationByHandle(HANDLE hFile, BY_HANDLE_FILE_INFORMATION* lpFileInformation)
#uselib "KERNEL32.dll"
#cfunc global GetFileInformationByHandle "GetFileInformationByHandle" intptr, var
; res = GetFileInformationByHandle(hFile, lpFileInformation)
; hFile : HANDLE -> "intptr"
; lpFileInformation : BY_HANDLE_FILE_INFORMATION* out -> "var"
; ※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。; BOOL GetFileInformationByHandle(HANDLE hFile, BY_HANDLE_FILE_INFORMATION* lpFileInformation)
#uselib "KERNEL32.dll"
#cfunc global GetFileInformationByHandle "GetFileInformationByHandle" intptr, intptr
; res = GetFileInformationByHandle(hFile, varptr(lpFileInformation))
; hFile : HANDLE -> "intptr"
; lpFileInformation : BY_HANDLE_FILE_INFORMATION* out -> "intptr"
; ※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")
	procGetFileInformationByHandle = kernel32.NewProc("GetFileInformationByHandle")
)

// hFile (HANDLE), lpFileInformation (BY_HANDLE_FILE_INFORMATION* out)
r1, _, err := procGetFileInformationByHandle.Call(
	uintptr(hFile),
	uintptr(lpFileInformation),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetFileInformationByHandle(
  hFile: THandle;   // HANDLE
  lpFileInformation: Pointer   // BY_HANDLE_FILE_INFORMATION* out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'GetFileInformationByHandle';

result := DllCall("KERNEL32\GetFileInformationByHandle"
    , "Ptr", hFile   ; HANDLE
    , "Ptr", lpFileInformation   ; BY_HANDLE_FILE_INFORMATION* out
    , "Int")   ; return: BOOL

●GetFileInformationByHandle(hFile, lpFileInformation) = DLL("KERNEL32.dll", "bool GetFileInformationByHandle(void*, void*)")
# 呼び出し: GetFileInformationByHandle(hFile, lpFileInformation)
# hFile : HANDLE -> "void*"
# lpFileInformation : BY_HANDLE_FILE_INFORMATION* out -> "void*"
# 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)。