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238 lines
11 KiB
238 lines
11 KiB
/* Copyright (C) 2008-2016 Peter Palotas, Jeffrey Jangli, Alexandr Normuradov
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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using System;
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using System.Globalization;
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using System.IO;
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using System.Runtime.InteropServices;
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using System.Security;
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namespace Alphaleonis.Win32.Filesystem
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{
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public static partial class File
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{
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#region Delete
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/// <summary>Deletes the specified file.</summary>
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/// <remarks>If the file to be deleted does not exist, no exception is thrown.</remarks>
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/// <param name="path">
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/// The name of the file to be deleted. Wildcard characters are not supported.
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/// </param>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="FileReadOnlyException"/>
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[SecurityCritical]
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public static void Delete(string path)
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{
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DeleteFileCore(null, path, false, PathFormat.RelativePath);
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}
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/// <summary>[AlphaFS] Deletes the specified file.</summary>
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/// <remarks>If the file to be deleted does not exist, no exception is thrown.</remarks>
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/// <param name="path">
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/// The name of the file to be deleted. Wildcard characters are not supported.
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/// </param>
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/// <param name="ignoreReadOnly">
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/// <see langword="true"/> overrides the read only <see cref="FileAttributes"/> of the file.
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/// </param>
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/// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="FileReadOnlyException"/>
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[SecurityCritical]
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public static void Delete(string path, bool ignoreReadOnly, PathFormat pathFormat)
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{
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DeleteFileCore(null, path, ignoreReadOnly, pathFormat);
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}
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/// <summary>[AlphaFS] Deletes the specified file.</summary>
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/// <remarks>If the file to be deleted does not exist, no exception is thrown.</remarks>
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/// <param name="path">
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/// The name of the file to be deleted. Wildcard characters are not supported.
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/// </param>
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/// <param name="ignoreReadOnly">
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/// <see langword="true"/> overrides the read only <see cref="FileAttributes"/> of the file.
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/// </param>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="FileReadOnlyException"/>
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[SecurityCritical]
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public static void Delete(string path, bool ignoreReadOnly)
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{
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DeleteFileCore(null, path, ignoreReadOnly, PathFormat.RelativePath);
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}
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#region Transactional
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/// <summary>[AlphaFS] Deletes the specified file.</summary>
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/// <remarks>If the file to be deleted does not exist, no exception is thrown.</remarks>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">
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/// The name of the file to be deleted. Wildcard characters are not supported.
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/// </param>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="FileReadOnlyException"/>
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[SecurityCritical]
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public static void DeleteTransacted(KernelTransaction transaction, string path)
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{
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DeleteFileCore(transaction, path, false, PathFormat.RelativePath);
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}
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/// <summary>[AlphaFS] Deletes the specified file.</summary>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">The name of the file to be deleted. Wildcard characters are not supported.</param>
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/// <param name="ignoreReadOnly"><see langword="true"/> overrides the read only <see cref="FileAttributes"/> of the file.</param>
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/// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
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/// <remarks>If the file to be deleted does not exist, no exception is thrown.</remarks>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="FileReadOnlyException"/>
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[SecurityCritical]
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public static void DeleteTransacted(KernelTransaction transaction, string path, bool ignoreReadOnly, PathFormat pathFormat)
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{
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DeleteFileCore(transaction, path, ignoreReadOnly, pathFormat);
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}
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/// <summary>[AlphaFS] Deletes the specified file.</summary>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">The name of the file to be deleted. Wildcard characters are not supported.</param>
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/// <param name="ignoreReadOnly"><see langword="true"/> overrides the read only <see cref="FileAttributes"/> of the file.</param>
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/// <remarks>If the file to be deleted does not exist, no exception is thrown.</remarks>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="FileReadOnlyException"/>
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[SecurityCritical]
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public static void DeleteTransacted(KernelTransaction transaction, string path, bool ignoreReadOnly)
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{
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DeleteFileCore(transaction, path, ignoreReadOnly, PathFormat.RelativePath);
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}
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#endregion // Transacted
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#endregion // Delete
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#region Internal Methods
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/// <summary>Deletes a Non-/Transacted file.</summary>
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/// <remarks>If the file to be deleted does not exist, no exception is thrown.</remarks>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="FileReadOnlyException"/>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">The name of the file to be deleted.</param>
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/// <param name="ignoreReadOnly"><see langword="true"/> overrides the read only <see cref="FileAttributes"/> of the file.</param>
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/// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
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[SecurityCritical]
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internal static void DeleteFileCore(KernelTransaction transaction, string path, bool ignoreReadOnly, PathFormat pathFormat)
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{
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#region Setup
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if (pathFormat == PathFormat.RelativePath)
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Path.CheckSupportedPathFormat(path, true, true);
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string pathLp = Path.GetExtendedLengthPathCore(transaction, path, pathFormat, GetFullPathOptions.TrimEnd | GetFullPathOptions.RemoveTrailingDirectorySeparator);
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// If the path points to a symbolic link, the symbolic link is deleted, not the target.
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#endregion // Setup
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startDeleteFile:
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if (!(transaction == null || !NativeMethods.IsAtLeastWindowsVista
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// DeleteFile() / DeleteFileTransacted()
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// In the ANSI version of this function, the name is limited to MAX_PATH characters.
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// To extend this limit to 32,767 wide characters, call the Unicode version of the function and prepend "\\?\" to the path.
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// 2013-01-13: MSDN confirms LongPath usage.
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? NativeMethods.DeleteFile(pathLp)
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: NativeMethods.DeleteFileTransacted(pathLp, transaction.SafeHandle)))
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{
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int lastError = Marshal.GetLastWin32Error();
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switch ((uint)lastError)
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{
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case Win32Errors.ERROR_FILE_NOT_FOUND:
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// MSDN: .NET 3.5+: If the file to be deleted does not exist, no exception is thrown.
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return;
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case Win32Errors.ERROR_PATH_NOT_FOUND:
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// MSDN: .NET 3.5+: DirectoryNotFoundException: The specified path is invalid (for example, it is on an unmapped drive).
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NativeError.ThrowException(lastError, pathLp);
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return;
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case Win32Errors.ERROR_SHARING_VIOLATION:
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// MSDN: .NET 3.5+: IOException: The specified file is in use or there is an open handle on the file.
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NativeError.ThrowException(lastError, pathLp);
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break;
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case Win32Errors.ERROR_ACCESS_DENIED:
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var data = new NativeMethods.WIN32_FILE_ATTRIBUTE_DATA();
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int dataInitialised = FillAttributeInfoCore(transaction, pathLp, ref data, false, true);
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if (data.dwFileAttributes != (FileAttributes)(-1))
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{
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if ((data.dwFileAttributes & FileAttributes.Directory) != 0)
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// MSDN: .NET 3.5+: UnauthorizedAccessException: Path is a directory.
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throw new UnauthorizedAccessException(string.Format(CultureInfo.CurrentCulture, "({0}) {1}",
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Win32Errors.ERROR_INVALID_PARAMETER, string.Format(CultureInfo.CurrentCulture, Resources.Target_File_Is_A_Directory, pathLp)));
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if ((data.dwFileAttributes & FileAttributes.ReadOnly) != 0)
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{
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if (ignoreReadOnly)
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{
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// Reset file attributes.
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SetAttributesCore(false, transaction, pathLp, FileAttributes.Normal, PathFormat.LongFullPath);
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goto startDeleteFile;
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}
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// MSDN: .NET 3.5+: UnauthorizedAccessException: Path specified a read-only file.
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throw new FileReadOnlyException(pathLp);
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}
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}
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if (dataInitialised == Win32Errors.ERROR_SUCCESS)
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// MSDN: .NET 3.5+: UnauthorizedAccessException: The caller does not have the required permission.
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NativeError.ThrowException(lastError, pathLp);
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break;
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}
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// MSDN: .NET 3.5+: IOException:
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// The specified file is in use.
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// There is an open handle on the file, and the operating system is Windows XP or earlier.
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NativeError.ThrowException(lastError, pathLp);
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}
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}
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#endregion // Internal Methods
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}
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}
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