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- /* Copyright (C) 2008-2016 Peter Palotas, Jeffrey Jangli, Alexandr Normuradov
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
- using Microsoft.Win32.SafeHandles;
- using System;
- using System.Diagnostics.CodeAnalysis;
- using System.IO;
- using System.Runtime.InteropServices;
- using System.Security;
- using System.Security.AccessControl;
-
- namespace Alphaleonis.Win32.Filesystem
- {
- public static partial class File
- {
- #region GetChangeTime
-
- /// <summary>[AlphaFS] Gets the change date and time of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in local time.</returns>
- /// <param name="path">The file for which to obtain creation date and time information.</param>
- /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
- [SecurityCritical]
- public static DateTime GetChangeTime(string path, PathFormat pathFormat)
- {
- return GetChangeTimeCore(false, null, null, path, false, pathFormat);
- }
-
-
- /// <summary>[AlphaFS] Gets the change date and time of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in local time.</returns>
- /// <param name="path">The file for which to obtain creation date and time information.</param>
- [SecurityCritical]
- public static DateTime GetChangeTime(string path)
- {
- return GetChangeTimeCore(false, null, null, path, false, PathFormat.RelativePath);
- }
-
- /// <summary>[AlphaFS] Gets the change date and time of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in local time.</returns>
- /// <param name="safeHandle">An open handle to the file or directory from which to retrieve information.</param>
- [SecurityCritical]
- public static DateTime GetChangeTime(SafeFileHandle safeHandle)
- {
- return GetChangeTimeCore(false, null, safeHandle, null, false, PathFormat.LongFullPath);
- }
-
- /// <summary>[AlphaFS] Gets the change date and time of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in local time.</returns>
- /// <param name="transaction">The transaction.</param>
- /// <param name="path">The file for which to obtain creation date and time information.</param>
- /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
- [SecurityCritical]
- public static DateTime GetChangeTimeTransacted(KernelTransaction transaction, string path, PathFormat pathFormat)
- {
- return GetChangeTimeCore(false, transaction, null, path, false, pathFormat);
- }
-
- /// <summary>[AlphaFS] Gets the change date and time of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in local time.</returns>
- /// <param name="transaction">The transaction.</param>
- /// <param name="path">The file for which to obtain creation date and time information.</param>
- [SecurityCritical]
- public static DateTime GetChangeTimeTransacted(KernelTransaction transaction, string path)
- {
- return GetChangeTimeCore(false, transaction, null, path, false, PathFormat.RelativePath);
- }
-
- #endregion // GetChangeTime
-
- #region GetChangeTimeUtc
-
- /// <summary>[AlphaFS] Gets the change date and time, in Coordinated Universal Time (UTC) format, of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in UTC time.</returns>
- /// <param name="path">The file for which to obtain change date and time information, in Coordinated Universal Time (UTC) format.</param>
- /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
- [SecurityCritical]
- public static DateTime GetChangeTimeUtc(string path, PathFormat pathFormat)
- {
- return GetChangeTimeCore(false, null, null, path, true, pathFormat);
- }
-
- /// <summary>[AlphaFS] Gets the change date and time, in Coordinated Universal Time (UTC) format, of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in UTC time.</returns>
- /// <param name="path">The file for which to obtain change date and time information, in Coordinated Universal Time (UTC) format.</param>
- [SecurityCritical]
- public static DateTime GetChangeTimeUtc(string path)
- {
- return GetChangeTimeCore(false, null, null, path, true, PathFormat.RelativePath);
- }
-
- /// <summary>[AlphaFS] Gets the change date and time, in Coordinated Universal Time (UTC) format, of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in UTC time.</returns>
- /// <param name="safeHandle">An open handle to the file or directory from which to retrieve information.</param>
- [SecurityCritical]
- public static DateTime GetChangeTimeUtc(SafeFileHandle safeHandle)
- {
- return GetChangeTimeCore(false, null, safeHandle, null, true, PathFormat.LongFullPath);
- }
-
- /// <summary>[AlphaFS] Gets the change date and time, in Coordinated Universal Time (UTC) format, of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in UTC time.</returns>
- /// <param name="transaction">The transaction.</param>
- /// <param name="path">The file for which to obtain change date and time information, in Coordinated Universal Time (UTC) format.</param>
- /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
- [SecurityCritical]
- public static DateTime GetChangeTimeUtcTransacted(KernelTransaction transaction, string path, PathFormat pathFormat)
- {
- return GetChangeTimeCore(false, transaction, null, path, true, pathFormat);
- }
-
- /// <summary>[AlphaFS] Gets the change date and time, in Coordinated Universal Time (UTC) format, of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in UTC time.</returns>
- /// <param name="transaction">The transaction.</param>
- /// <param name="path">The file for which to obtain change date and time information, in Coordinated Universal Time (UTC) format.</param>
- [SecurityCritical]
- public static DateTime GetChangeTimeUtcTransacted(KernelTransaction transaction, string path)
- {
- return GetChangeTimeCore(false, transaction, null, path, true, PathFormat.RelativePath);
- }
-
- #endregion // GetChangeTimeUtc
-
- #region Internal Methods
-
- /// <summary>Gets the change date and time of the specified file.</summary>
- /// <returns>A <see cref="System.DateTime"/> structure set to the change date and time for the specified file. This value is expressed in local time.</returns>
- /// <remarks><para>Use either <paramref name="path"/> or <paramref name="safeHandle"/>, not both.</para></remarks>
- /// <exception cref="ArgumentException"/>
- /// <exception cref="ArgumentNullException"/>
- /// <exception cref="PlatformNotSupportedException"/>
- /// <param name="isFolder">Specifies that <paramref name="path"/> is a file or directory.</param>
- /// <param name="transaction">The transaction.</param>
- /// <param name="safeHandle">An open handle to the file or directory from which to retrieve information.</param>
- /// <param name="path">The file or directory for which to obtain creation date and time information.</param>
- /// <param name="getUtc"><see langword="true"/> gets the Coordinated Universal Time (UTC), <see langword="false"/> gets the local time.</param>
- /// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
- [SuppressMessage("Microsoft.Reliability", "CA2000:Dispose objects before losing scope", Justification = "Disposing is under control.")]
- [SecurityCritical]
- internal static DateTime GetChangeTimeCore(bool isFolder, KernelTransaction transaction, SafeFileHandle safeHandle, string path, bool getUtc, PathFormat pathFormat)
- {
- if (!NativeMethods.IsAtLeastWindowsVista)
- throw new PlatformNotSupportedException(Resources.Requires_Windows_Vista_Or_Higher);
-
- bool callerHandle = safeHandle != null;
- if (!callerHandle)
- {
- if (pathFormat != PathFormat.LongFullPath && Utils.IsNullOrWhiteSpace(path))
- throw new ArgumentNullException("path");
-
- string pathLp = Path.GetExtendedLengthPathCore(transaction, path, pathFormat, GetFullPathOptions.RemoveTrailingDirectorySeparator | GetFullPathOptions.CheckInvalidPathChars);
-
- safeHandle = CreateFileCore(transaction, pathLp, isFolder ? ExtendedFileAttributes.BackupSemantics : ExtendedFileAttributes.Normal, null, FileMode.Open, FileSystemRights.ReadData, FileShare.ReadWrite, true, PathFormat.LongFullPath);
- }
-
-
- try
- {
- NativeMethods.IsValidHandle(safeHandle);
-
- using (var safeBuffer = new SafeGlobalMemoryBufferHandle(IntPtr.Size + Marshal.SizeOf(typeof(NativeMethods.FILE_BASIC_INFO))))
- {
- NativeMethods.FILE_BASIC_INFO fbi;
-
- if (!NativeMethods.GetFileInformationByHandleEx_FileBasicInfo(safeHandle, NativeMethods.FileInfoByHandleClass.FileBasicInfo, out fbi, (uint)safeBuffer.Capacity))
- NativeError.ThrowException(Marshal.GetLastWin32Error());
-
- safeBuffer.StructureToPtr(fbi, true);
- NativeMethods.FILETIME changeTime = safeBuffer.PtrToStructure<NativeMethods.FILE_BASIC_INFO>(0).ChangeTime;
-
- return getUtc
- ? DateTime.FromFileTimeUtc(changeTime)
- : DateTime.FromFileTime(changeTime);
- }
- }
- finally
- {
- // Handle is ours, dispose.
- if (!callerHandle && safeHandle != null)
- safeHandle.Close();
- }
- }
-
- #endregion // Internal Methods
- }
- }
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