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417 lines
22 KiB
417 lines
22 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.Diagnostics.CodeAnalysis;
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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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partial class Directory
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{
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#region .NET
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/// <summary>Deletes an empty directory from a specified path.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="path">The name of the empty directory to remove. This directory must be writable and empty.</param>
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[SecurityCritical]
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public static void Delete(string path)
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{
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DeleteDirectoryCore(null, null, path, false, false, true, false, PathFormat.RelativePath);
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}
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/// <summary>Deletes the specified directory and, if indicated, any subdirectories in the directory.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="path">The name of the directory to remove.</param>
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/// <param name="recursive"><see langword="true"/> to remove directories, subdirectories, and files in <paramref name="path"/>. <see langword="false"/> otherwise.</param>
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[SecurityCritical]
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public static void Delete(string path, bool recursive)
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{
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DeleteDirectoryCore(null, null, path, recursive, false, !recursive, false, PathFormat.RelativePath);
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}
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#endregion // .NET
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/// <summary>[AlphaFS] Deletes an empty directory from a specified path.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="path">The name of the empty directory to remove. This directory must be writable and empty.</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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public static void Delete(string path, PathFormat pathFormat)
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{
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DeleteDirectoryCore(null, null, path, false, false, true, false, pathFormat);
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}
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/// <summary>[AlphaFS] Deletes the specified directory and, if indicated, any subdirectories in the directory.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="path">The name of the directory to remove.</param>
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/// <param name="recursive"><see langword="true"/> to remove directories, subdirectories, and files in <paramref name="path"/>. <see langword="false"/> otherwise.</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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public static void Delete(string path, bool recursive, PathFormat pathFormat)
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{
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DeleteDirectoryCore(null, null, path, recursive, false, !recursive, false, pathFormat);
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}
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/// <summary>[AlphaFS] Deletes the specified directory and, if indicated, any subdirectories in the directory.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="path">The name of the directory to remove.</param>
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/// <param name="recursive"><see langword="true"/> to remove directories, subdirectories, and files in <paramref name="path"/>. <see langword="false"/> otherwise.</param>
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/// <param name="ignoreReadOnly"><see langword="true"/> overrides read only <see cref="FileAttributes"/> of files and directories.</param>
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[SecurityCritical]
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public static void Delete(string path, bool recursive, bool ignoreReadOnly)
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{
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DeleteDirectoryCore(null, null, path, recursive, ignoreReadOnly, !recursive, false, PathFormat.RelativePath);
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}
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/// <summary>[AlphaFS] Deletes the specified directory and, if indicated, any subdirectories in the directory.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="path">The name of the directory to remove.</param>
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/// <param name="recursive"><see langword="true"/> to remove directories, subdirectories, and files in <paramref name="path"/>. <see langword="false"/> otherwise.</param>
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/// <param name="ignoreReadOnly"><see langword="true"/> overrides read only <see cref="FileAttributes"/> of files and directories.</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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public static void Delete(string path, bool recursive, bool ignoreReadOnly, PathFormat pathFormat)
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{
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DeleteDirectoryCore(null, null, path, recursive, ignoreReadOnly, !recursive, false, pathFormat);
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}
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#region Transactional
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/// <summary>[AlphaFS] Deletes an empty directory from a specified path.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">The name of the empty directory to remove. This directory must be writable and empty.</param>
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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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DeleteDirectoryCore(null, transaction, path, false, false, true, false, PathFormat.RelativePath);
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}
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/// <summary>[AlphaFS] Deletes an empty directory from a specified path.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">The name of the empty directory to remove. This directory must be writable and empty.</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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public static void DeleteTransacted(KernelTransaction transaction, string path, PathFormat pathFormat)
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{
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DeleteDirectoryCore(null, transaction, path, false, false, true, false, pathFormat);
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}
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/// <summary>[AlphaFS] Deletes the specified directory and, if indicated, any subdirectories in the directory.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">The name of the directory to remove.</param>
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/// <param name="recursive"><see langword="true"/> to remove directories, subdirectories, and files in <paramref name="path"/>. <see langword="false"/> otherwise.</param>
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[SecurityCritical]
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public static void DeleteTransacted(KernelTransaction transaction, string path, bool recursive)
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{
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DeleteDirectoryCore(null, transaction, path, recursive, false, !recursive, false, PathFormat.RelativePath);
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}
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/// <summary>[AlphaFS] Deletes the specified directory and, if indicated, any subdirectories in the directory.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">The name of the directory to remove.</param>
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/// <param name="recursive"><see langword="true"/> to remove directories, subdirectories, and files in <paramref name="path"/>. <see langword="false"/> otherwise.</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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public static void DeleteTransacted(KernelTransaction transaction, string path, bool recursive, PathFormat pathFormat)
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{
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DeleteDirectoryCore(null, transaction, path, recursive, false, !recursive, false, pathFormat);
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}
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/// <summary>[AlphaFS] Deletes the specified directory and, if indicated, any subdirectories in the directory.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">The name of the directory to remove.</param>
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/// <param name="recursive"><see langword="true"/> to remove directories, subdirectories, and files in <paramref name="path"/>. <see langword="false"/> otherwise.</param>
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/// <param name="ignoreReadOnly"><see langword="true"/> overrides read only <see cref="FileAttributes"/> of files and directories.</param>
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[SecurityCritical]
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public static void DeleteTransacted(KernelTransaction transaction, string path, bool recursive, bool ignoreReadOnly)
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{
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DeleteDirectoryCore(null, transaction, path, recursive, ignoreReadOnly, !recursive, false, PathFormat.RelativePath);
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}
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/// <summary>[AlphaFS] Deletes the specified directory and, if indicated, any subdirectories in the directory.</summary>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">The name of the directory to remove.</param>
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/// <param name="recursive"><see langword="true"/> to remove directories, subdirectories, and files in <paramref name="path"/>. <see langword="false"/> otherwise.</param>
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/// <param name="ignoreReadOnly"><see langword="true"/> overrides read only <see cref="FileAttributes"/> of files and directories.</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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public static void DeleteTransacted(KernelTransaction transaction, string path, bool recursive, bool ignoreReadOnly, PathFormat pathFormat)
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{
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DeleteDirectoryCore(null, transaction, path, recursive, ignoreReadOnly, !recursive, false, pathFormat);
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}
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#endregion // Transactional
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#region Internal Methods
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/// <summary>Deletes the specified directory and, if indicated, any subdirectories in the directory.</summary>
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/// <remarks>The RemoveDirectory function marks a directory for deletion on close. Therefore, the directory is not removed until the last handle to the directory is closed.</remarks>
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/// <exception cref="ArgumentException"/>
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/// <exception cref="ArgumentNullException"/>
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/// <exception cref="DirectoryNotFoundException"/>
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/// <exception cref="IOException"/>
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/// <exception cref="NotSupportedException"/>
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/// <exception cref="UnauthorizedAccessException"/>
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/// <exception cref="DirectoryReadOnlyException"/>
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/// <param name="fileSystemEntryInfo">A FileSystemEntryInfo instance. Use either <paramref name="fileSystemEntryInfo"/> or <paramref name="path"/>, not both.</param>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path">The name of the directory to remove. Use either <paramref name="path"/> or <paramref name="fileSystemEntryInfo"/>, not both.</param>
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/// <param name="recursive"><see langword="true"/> to remove all files and subdirectories recursively; <see langword="false"/> otherwise only the top level empty directory.</param>
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/// <param name="ignoreReadOnly"><see langword="true"/> overrides read only attribute of files and directories.</param>
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/// <param name="requireEmpty"><see langword="true"/> requires the directory must be empty.</param>
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/// <param name="continueOnNotExist"><see langword="true"/> does not throw an Exception when the file system object does not exist.</param>
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/// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
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[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")]
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[SecurityCritical]
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internal static void DeleteDirectoryCore(FileSystemEntryInfo fileSystemEntryInfo, KernelTransaction transaction, string path, bool recursive, bool ignoreReadOnly, bool requireEmpty, bool continueOnNotExist, 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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if (fileSystemEntryInfo == null)
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{
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// MSDN: .NET 3.5+: DirectoryNotFoundException:
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// Path does not exist or could not be found.
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// Path refers to a file instead of a directory.
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// The specified path is invalid (for example, it is on an unmapped drive).
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fileSystemEntryInfo = File.GetFileSystemEntryInfoCore(true, transaction, Path.GetExtendedLengthPathCore(transaction, path, pathFormat, GetFullPathOptions.TrimEnd | GetFullPathOptions.RemoveTrailingDirectorySeparator), continueOnNotExist, pathFormat);
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}
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if (fileSystemEntryInfo == null)
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return;
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string pathLp = fileSystemEntryInfo.LongFullPath;
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#endregion // Setup
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// Do not follow mount points nor symbolic links, but do delete the reparse point itself.
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// If directory is reparse point, disable recursion.
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if (recursive && fileSystemEntryInfo.IsReparsePoint)
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recursive = false;
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// Check to see if this is a mount point, and unmount it.
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if (fileSystemEntryInfo.IsMountPoint)
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{
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int lastError = Volume.DeleteVolumeMountPointCore(pathLp, true);
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if (lastError != Win32Errors.ERROR_SUCCESS && lastError != Win32Errors.ERROR_PATH_NOT_FOUND)
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NativeError.ThrowException(lastError, pathLp);
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// Now it is safe to delete the actual directory.
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}
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if (recursive)
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{
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// Enumerate all file system objects.
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foreach (var fsei in EnumerateFileSystemEntryInfosCore<FileSystemEntryInfo>(transaction, pathLp, Path.WildcardStarMatchAll, DirectoryEnumerationOptions.FilesAndFolders, PathFormat.LongFullPath))
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{
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if (fsei.IsDirectory)
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DeleteDirectoryCore(fsei, transaction, null, true, ignoreReadOnly, requireEmpty, true, PathFormat.LongFullPath);
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else
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File.DeleteFileCore(transaction, fsei.LongFullPath, ignoreReadOnly, PathFormat.LongFullPath);
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}
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}
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#region Remove
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startRemoveDirectory:
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if (!(transaction == null || !NativeMethods.IsAtLeastWindowsVista
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// RemoveDirectory() / RemoveDirectoryTransacted()
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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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// 2014-09-09: MSDN confirms LongPath usage.
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// RemoveDirectory on a symbolic link will remove the link itself.
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? NativeMethods.RemoveDirectory(pathLp)
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: NativeMethods.RemoveDirectoryTransacted(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_DIR_NOT_EMPTY:
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if (requireEmpty)
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// MSDN: .NET 3.5+: IOException: The directory specified by path is not an empty directory.
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throw new DirectoryNotEmptyException(pathLp);
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goto startRemoveDirectory;
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case Win32Errors.ERROR_DIRECTORY:
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// MSDN: .NET 3.5+: DirectoryNotFoundException: Path refers to a file instead of a directory.
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if (File.ExistsCore(false, transaction, pathLp, PathFormat.LongFullPath))
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throw new DirectoryNotFoundException(string.Format(CultureInfo.CurrentCulture, "({0}) {1}", Win32Errors.ERROR_INVALID_PARAMETER, string.Format(CultureInfo.CurrentCulture, Resources.Target_Directory_Is_A_File, pathLp)));
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break;
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case Win32Errors.ERROR_PATH_NOT_FOUND:
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if (continueOnNotExist)
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return;
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break;
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case Win32Errors.ERROR_SHARING_VIOLATION:
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// MSDN: .NET 3.5+: IOException: The directory is being used by another process or there is an open handle on the directory.
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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 = File.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.ReadOnly) != 0)
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{
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// MSDN: .NET 3.5+: IOException: The directory specified by path is read-only.
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if (ignoreReadOnly)
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{
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// Reset directory attributes.
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File.SetAttributesCore(true, transaction, pathLp, FileAttributes.Normal, true, PathFormat.LongFullPath);
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goto startRemoveDirectory;
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}
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// MSDN: .NET 3.5+: IOException: The directory is read-only.
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throw new DirectoryReadOnlyException(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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// A file with the same name and location specified by path exists.
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// The directory specified by path is read-only, or recursive is false and path is not an empty directory.
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// The directory is the application's current working directory.
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// The directory contains a read-only file.
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// The directory is being used by another process.
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NativeError.ThrowException(lastError, pathLp);
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}
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#endregion // Remove
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}
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#endregion // Internal Methods
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}
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}
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