619 lines
24 KiB
C#
619 lines
24 KiB
C#
// Copyright (C) 2015, The Duplicati Team
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// http://www.duplicati.com, info@duplicati.com
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using System.Linq;
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using System.Collections.Generic;
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using System.Security.AccessControl;
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using System.IO;
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using AlphaFS = Alphaleonis.Win32.Filesystem;
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namespace Duplicati.Library.Snapshots
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{
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public struct SystemIOWindows : ISystemIO
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{
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private const string UNCPREFIX = @"\\?\";
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private const string UNCPREFIX_SERVER = @"\\?\UNC\";
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private const string PATHPREFIX_SERVER = @"\\";
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private static readonly string DIRSEP = System.IO.Path.DirectorySeparatorChar.ToString();
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public static bool IsPathTooLong(string path)
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{
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if (path.StartsWith(UNCPREFIX, StringComparison.Ordinal) || path.StartsWith(UNCPREFIX_SERVER, StringComparison.Ordinal) || path.Length > 260)
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return true;
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return false;
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}
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public static string PrefixWithUNC(string path)
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{
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if (path.StartsWith(UNCPREFIX_SERVER, StringComparison.Ordinal))
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return path;
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if (path.StartsWith(UNCPREFIX, StringComparison.Ordinal))
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return path;
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if (path.StartsWith(PATHPREFIX_SERVER, StringComparison.Ordinal))
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return UNCPREFIX_SERVER + path.Remove(0, PATHPREFIX_SERVER.Length);
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return UNCPREFIX + path;
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}
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public static string StripUNCPrefix(string path)
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{
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if (path.StartsWith(UNCPREFIX, StringComparison.Ordinal))
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return path.Substring(UNCPREFIX.Length);
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else
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return path;
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}
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#region ISystemIO implementation
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public void DirectoryDelete(string path)
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{
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if (!IsPathTooLong(path))
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try
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{
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System.IO.Directory.Delete(path);
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return;
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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Alphaleonis.Win32.Filesystem.Directory.Delete(PrefixWithUNC(path));
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}
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public void DirectoryCreate(string path)
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{
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if (!IsPathTooLong(path))
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try
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{
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System.IO.Directory.CreateDirectory(path);
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return;
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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Alphaleonis.Win32.Filesystem.Directory.CreateDirectory(PrefixWithUNC(path));
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}
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public bool DirectoryExists(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.Directory.Exists(path); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.Directory.Exists(PrefixWithUNC(path));
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}
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public void FileDelete(string path)
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{
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if (!IsPathTooLong(path))
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try
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{
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System.IO.File.Delete(path);
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return;
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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Alphaleonis.Win32.Filesystem.File.Delete(PrefixWithUNC(path));
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}
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public void FileSetLastWriteTimeUtc(string path, DateTime time)
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{
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if (!IsPathTooLong(path))
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try
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{
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System.IO.File.SetLastWriteTimeUtc(path, time);
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return;
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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Alphaleonis.Win32.Filesystem.File.SetLastWriteTimeUtc(PrefixWithUNC(path), time);
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}
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public void FileSetCreationTimeUtc(string path, DateTime time)
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{
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if (!IsPathTooLong(path))
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try
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{
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System.IO.File.SetCreationTimeUtc(path, time);
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return;
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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Alphaleonis.Win32.Filesystem.File.SetCreationTimeUtc(PrefixWithUNC(path), time);
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}
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public DateTime FileGetLastWriteTimeUtc(string path)
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{
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if (!IsPathTooLong(path))
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try
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{
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return System.IO.File.GetLastWriteTimeUtc(path);
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.File.GetLastWriteTimeUtc(PrefixWithUNC(path));
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}
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public DateTime FileGetCreationTimeUtc(string path)
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{
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if (!IsPathTooLong(path))
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try
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{
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return System.IO.File.GetCreationTimeUtc(path);
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.File.GetCreationTimeUtc(PrefixWithUNC(path));
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}
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public bool FileExists(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.File.Exists(path); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.File.Exists(PrefixWithUNC(path));
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}
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public System.IO.Stream FileOpenRead(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.File.Open(path, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.File.Open(PrefixWithUNC(path), FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
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}
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public System.IO.Stream FileOpenWrite(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.File.OpenWrite(path); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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if (FileExists(path))
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return Alphaleonis.Win32.Filesystem.File.OpenWrite(PrefixWithUNC(path));
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else
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return FileCreate(path);
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}
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public System.IO.Stream FileOpenReadWrite(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.File.Open(path, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.ReadWrite, System.IO.FileShare.Read); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.File.Open(PrefixWithUNC(path), FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.Read);
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}
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public System.IO.Stream FileCreate(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.File.Create(path); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.File.Create(PrefixWithUNC(path));
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}
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public System.IO.FileAttributes GetFileAttributes(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.File.GetAttributes(path); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return (System.IO.FileAttributes)Alphaleonis.Win32.Filesystem.File.GetAttributes(PrefixWithUNC(path));
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}
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public void SetFileAttributes(string path, System.IO.FileAttributes attributes)
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{
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if (!IsPathTooLong(path))
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try
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{
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System.IO.File.SetAttributes(path, attributes);
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return;
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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Alphaleonis.Win32.Filesystem.File.SetAttributes(PrefixWithUNC(path), (FileAttributes)attributes);
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}
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public void CreateSymlink(string symlinkfile, string target, bool asDir)
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{
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if (FileExists(symlinkfile) || DirectoryExists(symlinkfile))
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throw new System.IO.IOException(string.Format("File already exists: {0}", symlinkfile));
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Alphaleonis.Win32.Filesystem.File.CreateSymbolicLink(target, PrefixWithUNC(symlinkfile), asDir ? Alphaleonis.Win32.Filesystem.SymbolicLinkTarget.Directory : Alphaleonis.Win32.Filesystem.SymbolicLinkTarget.File);
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//Sadly we do not get a notification if the creation fails :(
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System.IO.FileAttributes attr = 0;
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if ((!asDir && FileExists(symlinkfile)) || (asDir && DirectoryExists(symlinkfile)))
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try { attr = GetFileAttributes(symlinkfile); }
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catch { }
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if ((attr & System.IO.FileAttributes.ReparsePoint) == 0)
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throw new System.IO.IOException(string.Format("Unable to create symlink, check account permissions: {0}", symlinkfile));
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}
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/// <summary>
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/// Returns the symlink target if the entry is a symlink, and null otherwise
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/// </summary>
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/// <param name="file">The file or folder to examine</param>
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/// <returns>The symlink target</returns>
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public string GetSymlinkTarget(string file)
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{
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try
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{
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try
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{
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return AlphaFS.File.GetLinkTargetInfo(file).PrintName;
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}
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catch (PathTooLongException) { }
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return AlphaFS.File.GetLinkTargetInfo(SystemIOWindows.PrefixWithUNC(file)).PrintName;
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}
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catch (AlphaFS.NotAReparsePointException) { }
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catch (AlphaFS.UnrecognizedReparsePointException) { }
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// This path looks like it isn't actually a symlink
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// (Note that some reparse points aren't actually symlinks -
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// things like the OneDrive folder in the Windows 10 Fall Creator's Update for example)
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return null;
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}
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public IEnumerable<string> EnumerateFileSystemEntries(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.Directory.EnumerateFileSystemEntries(path); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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var r = Alphaleonis.Win32.Filesystem.Directory.GetFileSystemEntries(PrefixWithUNC(path));
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for (var i = 0; i < r.Length; i++)
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r[i] = StripUNCPrefix(r[i]);
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return r;
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}
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public string PathGetFileName(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.Path.GetFileName(path); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return StripUNCPrefix(Alphaleonis.Win32.Filesystem.Path.GetFileName(PrefixWithUNC(path)));
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}
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public string PathGetDirectoryName(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.Path.GetDirectoryName(path); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return StripUNCPrefix(Alphaleonis.Win32.Filesystem.Path.GetDirectoryName(PrefixWithUNC(path)));
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}
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public string PathGetExtension(string path)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.Path.GetExtension(path); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return StripUNCPrefix(Alphaleonis.Win32.Filesystem.Path.GetExtension(PrefixWithUNC(path)));
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}
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public string PathChangeExtension(string path, string extension)
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{
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if (!IsPathTooLong(path))
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try { return System.IO.Path.ChangeExtension(path, extension); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return StripUNCPrefix(Alphaleonis.Win32.Filesystem.Path.ChangeExtension(PrefixWithUNC(path), extension));
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}
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public string PathCombine(string path1, string path2)
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{
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if (!IsPathTooLong(path1 + "\\" + path2))
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try { return System.IO.Path.Combine(path1, path2); }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return StripUNCPrefix(Alphaleonis.Win32.Filesystem.Path.Combine(PrefixWithUNC(path1), path2));
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}
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public void DirectorySetLastWriteTimeUtc(string path, DateTime time)
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{
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if (!IsPathTooLong(path))
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try
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{
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System.IO.Directory.SetLastWriteTimeUtc(path, time);
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return;
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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Alphaleonis.Win32.Filesystem.File.SetLastWriteTimeUtc(PrefixWithUNC(path), time);
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}
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public void DirectorySetCreationTimeUtc(string path, DateTime time)
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{
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if (!IsPathTooLong(path))
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try
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{
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System.IO.Directory.SetCreationTimeUtc(path, time);
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return;
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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Alphaleonis.Win32.Filesystem.File.SetCreationTimeUtc(PrefixWithUNC(path), time);
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}
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public DateTime DirectoryGetLastWriteTimeUtc(string path)
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{
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if (!IsPathTooLong(path))
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try
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{
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return System.IO.Directory.GetLastWriteTimeUtc(path);
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.Directory.GetLastWriteTimeUtc(PrefixWithUNC(path));
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}
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public DateTime DirectoryGetCreationTimeUtc(string path)
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{
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if (!IsPathTooLong(path))
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try
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{
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return System.IO.Directory.GetCreationTimeUtc(path);
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.Directory.GetCreationTimeUtc(PrefixWithUNC(path));
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}
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public void FileMove(string source, string target)
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{
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if (!IsPathTooLong(source) && !IsPathTooLong(target))
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try
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{
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System.IO.File.Move(source, target);
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return;
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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Alphaleonis.Win32.Filesystem.File.Move(PrefixWithUNC(source), PrefixWithUNC(target));
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}
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public long FileLength(string path)
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{
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if (!IsPathTooLong(path))
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try { return new System.IO.FileInfo(path).Length; }
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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return new Alphaleonis.Win32.Filesystem.FileInfo(PrefixWithUNC(path)).Length;
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}
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public void DirectoryDelete(string path, bool recursive)
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{
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if (!IsPathTooLong(path))
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try
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{
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System.IO.Directory.Delete(path, recursive);
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return;
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}
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catch (System.IO.PathTooLongException) { }
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catch (System.ArgumentException) { }
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Alphaleonis.Win32.Filesystem.Directory.Delete(PrefixWithUNC(path), recursive);
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}
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private class FileSystemAccess
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{
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public FileSystemRights Rights;
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public AccessControlType ControlType;
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public string SID;
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public bool Inherited;
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public InheritanceFlags Inheritance;
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public PropagationFlags Propagation;
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public FileSystemAccess()
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{
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}
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public FileSystemAccess(FileSystemAccessRule rule)
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{
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Rights = rule.FileSystemRights;
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ControlType = rule.AccessControlType;
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SID = rule.IdentityReference.Value;
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Inherited = rule.IsInherited;
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Inheritance = rule.InheritanceFlags;
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Propagation = rule.PropagationFlags;
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}
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public FileSystemAccessRule Create(System.Security.AccessControl.FileSystemSecurity owner)
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{
|
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return (FileSystemAccessRule)owner.AccessRuleFactory(
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new System.Security.Principal.SecurityIdentifier(SID),
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(int)Rights,
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Inherited,
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Inheritance,
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Propagation,
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ControlType);
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}
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}
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private string SerializeObject<T>(T o)
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{
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using(var tw = new System.IO.StringWriter())
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{
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Newtonsoft.Json.JsonSerializer.Create(new Newtonsoft.Json.JsonSerializerSettings() { Culture = System.Globalization.CultureInfo.InvariantCulture }).Serialize(tw, o);
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tw.Flush();
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return tw.ToString();
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}
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}
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private T DeserializeObject<T>(string data)
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{
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using(var tr = new System.IO.StringReader(data))
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return (T)Newtonsoft.Json.JsonSerializer.Create(new Newtonsoft.Json.JsonSerializerSettings() { Culture = System.Globalization.CultureInfo.InvariantCulture }).Deserialize(tr, typeof(T));
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}
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private System.Security.AccessControl.FileSystemSecurity GetAccessControlDir(string path)
|
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{
|
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if (!IsPathTooLong(path))
|
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try { return System.IO.Directory.GetAccessControl(path); }
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catch (System.IO.PathTooLongException) { }
|
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.Directory.GetAccessControl(PrefixWithUNC(path));
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}
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private System.Security.AccessControl.FileSystemSecurity GetAccessControlFile(string path)
|
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{
|
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if (!IsPathTooLong(path))
|
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try { return System.IO.File.GetAccessControl(path); }
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catch (System.IO.PathTooLongException) { }
|
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catch (System.ArgumentException) { }
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return Alphaleonis.Win32.Filesystem.File.GetAccessControl(PrefixWithUNC(path));
|
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}
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|
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private void SetAccessControlFile(string path, FileSecurity rules)
|
|
{
|
|
if (!IsPathTooLong(path))
|
|
try
|
|
{
|
|
System.IO.File.SetAccessControl(path, rules);
|
|
return;
|
|
}
|
|
catch (System.IO.PathTooLongException) { }
|
|
catch (System.ArgumentException) { }
|
|
|
|
Alphaleonis.Win32.Filesystem.File.SetAccessControl(PrefixWithUNC(path), rules, AccessControlSections.All);
|
|
}
|
|
|
|
private void SetAccessControlDir(string path, DirectorySecurity rules)
|
|
{
|
|
if (!IsPathTooLong(path))
|
|
try
|
|
{
|
|
System.IO.Directory.SetAccessControl(path, rules);
|
|
return;
|
|
}
|
|
catch (System.IO.PathTooLongException) { }
|
|
catch (System.ArgumentException) { }
|
|
|
|
Alphaleonis.Win32.Filesystem.Directory.SetAccessControl(PrefixWithUNC(path), rules, AccessControlSections.All);
|
|
}
|
|
|
|
public Dictionary<string, string> GetMetadata(string path, bool isSymlink, bool followSymlink)
|
|
{
|
|
var isDirTarget = path.EndsWith(DIRSEP, StringComparison.Ordinal);
|
|
var targetpath = isDirTarget ? path.Substring(0, path.Length - 1) : path;
|
|
var dict = new Dictionary<string, string>();
|
|
|
|
System.Security.AccessControl.FileSystemSecurity rules;
|
|
|
|
if (isDirTarget)
|
|
rules = GetAccessControlDir(targetpath);
|
|
else
|
|
rules = GetAccessControlFile(targetpath);
|
|
|
|
var objs = new List<FileSystemAccess>();
|
|
foreach(var f in rules.GetAccessRules(true, false, typeof(System.Security.Principal.SecurityIdentifier)))
|
|
objs.Add(new FileSystemAccess((FileSystemAccessRule)f));
|
|
|
|
dict["win-ext:accessrules"] = SerializeObject(objs);
|
|
|
|
return dict;
|
|
}
|
|
|
|
public void SetMetadata(string path, Dictionary<string, string> data, bool restorePermissions)
|
|
{
|
|
var isDirTarget = path.EndsWith(DIRSEP, StringComparison.Ordinal);
|
|
var targetpath = isDirTarget ? path.Substring(0, path.Length - 1) : path;
|
|
|
|
System.Security.AccessControl.FileSystemSecurity rules;
|
|
|
|
if (isDirTarget)
|
|
rules = GetAccessControlDir(targetpath);
|
|
else
|
|
rules = GetAccessControlFile(targetpath);
|
|
|
|
if (restorePermissions && data.ContainsKey("win-ext:accessrules"))
|
|
{
|
|
var content = DeserializeObject<FileSystemAccess[]>(data["win-ext:accessrules"]);
|
|
var c = rules.GetAccessRules(true, false, typeof(System.Security.Principal.SecurityIdentifier));
|
|
for(var i = c.Count - 1; i >= 0; i--)
|
|
rules.RemoveAccessRule((System.Security.AccessControl.FileSystemAccessRule)c[i]);
|
|
|
|
Exception ex = null;
|
|
|
|
foreach (var r in content)
|
|
{
|
|
// Attempt to apply as many rules as we can
|
|
try
|
|
{
|
|
rules.AddAccessRule((System.Security.AccessControl.FileSystemAccessRule)r.Create(rules));
|
|
}
|
|
catch(Exception e)
|
|
{
|
|
ex = e;
|
|
}
|
|
}
|
|
|
|
if (ex != null)
|
|
throw ex;
|
|
|
|
if (isDirTarget)
|
|
SetAccessControlDir(targetpath, (DirectorySecurity)rules);
|
|
else
|
|
SetAccessControlFile(targetpath, (FileSecurity)rules);
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|
|
|