693 lines
22 KiB
C#
693 lines
22 KiB
C#
//
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// System.IO.File.cs
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//
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//
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// Authors:
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// Miguel de Icaza (miguel@ximian.com)
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// Jim Richardson (develop@wtfo-guru.com)
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// Dan Lewis (dihlewis@yahoo.co.uk)
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// Ville Palo (vi64pa@kolumbus.fi)
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//
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// Copyright 2002 Ximian, Inc. http://www.ximian.com
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// Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
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// Copyright (C) 2004, 2006, 2010 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in 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,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Security;
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using System.Text;
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using System.Runtime.InteropServices;
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#if !NET_2_1
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using System.Security.AccessControl;
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#endif
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namespace System.IO
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{
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[ComVisible (true)]
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public static class File
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{
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public static void AppendAllText (string path, string contents)
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{
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using (TextWriter w = new StreamWriter (path, true)) {
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w.Write (contents);
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}
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}
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public static void AppendAllText (string path, string contents, Encoding encoding)
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{
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using (TextWriter w = new StreamWriter (path, true, encoding)) {
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w.Write (contents);
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}
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}
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public static StreamWriter AppendText (string path)
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{
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return new StreamWriter (path, true);
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}
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public static void Copy (string sourceFileName, string destFileName)
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{
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Copy (sourceFileName, destFileName, false);
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}
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public static void Copy (string sourceFileName, string destFileName, bool overwrite)
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{
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MonoIOError error;
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if (sourceFileName == null)
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throw new ArgumentNullException ("sourceFileName");
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if (destFileName == null)
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throw new ArgumentNullException ("destFileName");
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if (sourceFileName.Length == 0)
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throw new ArgumentException ("An empty file name is not valid.", "sourceFileName");
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if (sourceFileName.Trim ().Length == 0 || sourceFileName.IndexOfAny (Path.InvalidPathChars) != -1)
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throw new ArgumentException ("The file name is not valid.");
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if (destFileName.Length == 0)
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throw new ArgumentException ("An empty file name is not valid.", "destFileName");
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if (destFileName.Trim ().Length == 0 || destFileName.IndexOfAny (Path.InvalidPathChars) != -1)
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throw new ArgumentException ("The file name is not valid.");
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SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
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if (!MonoIO.Exists (sourceFileName, out error))
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throw new FileNotFoundException (Locale.GetText ("{0} does not exist", sourceFileName), sourceFileName);
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if ((GetAttributes (sourceFileName) & FileAttributes.Directory) == FileAttributes.Directory)
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throw new ArgumentException (Locale.GetText ("{0} is a directory", sourceFileName));
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if (MonoIO.Exists (destFileName, out error)) {
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if ((GetAttributes (destFileName) & FileAttributes.Directory) == FileAttributes.Directory)
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throw new ArgumentException (Locale.GetText ("{0} is a directory", destFileName));
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if (!overwrite)
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throw new IOException (Locale.GetText ("{0} already exists", destFileName));
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}
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string DirName = Path.GetDirectoryName (destFileName);
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if (DirName != String.Empty && !Directory.Exists (DirName))
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throw new DirectoryNotFoundException (Locale.GetText ("Destination directory not found: {0}",DirName));
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if (!MonoIO.CopyFile (sourceFileName, destFileName, overwrite, out error)) {
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string p = Locale.GetText ("{0}\" or \"{1}", sourceFileName, destFileName);
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throw MonoIO.GetException (p, error);
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}
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}
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public static FileStream Create (string path)
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{
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return Create (path, 8192);
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}
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public static FileStream Create (string path, int bufferSize)
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{
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return new FileStream (path, FileMode.Create, FileAccess.ReadWrite,
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FileShare.None, bufferSize);
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}
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#if !NET_2_1
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[MonoLimitation ("FileOptions are ignored")]
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public static FileStream Create (string path, int bufferSize,
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FileOptions options)
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{
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return Create (path, bufferSize, options, null);
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}
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[MonoLimitation ("FileOptions and FileSecurity are ignored")]
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public static FileStream Create (string path, int bufferSize,
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FileOptions options,
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FileSecurity fileSecurity)
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{
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return new FileStream (path, FileMode.Create, FileAccess.ReadWrite,
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FileShare.None, bufferSize, options);
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}
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#endif
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public static StreamWriter CreateText (string path)
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{
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return new StreamWriter (path, false);
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}
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public static void Delete (string path)
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{
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Path.Validate (path);
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if (Directory.Exists (path))
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throw new UnauthorizedAccessException(Locale.GetText ("{0} is a directory", path));
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string DirName = Path.GetDirectoryName(path);
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if (DirName != String.Empty && !Directory.Exists (DirName))
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throw new DirectoryNotFoundException (Locale.GetText ("Could not find a part of the path \"{0}\".", path));
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SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
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MonoIOError error;
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if (!MonoIO.DeleteFile (path, out error)){
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if (error != MonoIOError.ERROR_FILE_NOT_FOUND)
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throw MonoIO.GetException (path, error);
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}
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}
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public static bool Exists (string path)
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{
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// For security reasons no exceptions are
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// thrown, only false is returned if there is
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// any problem with the path or permissions.
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// Minimizes what information can be
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// discovered by using this method.
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if (String.IsNullOrWhiteSpace (path) || path.IndexOfAny(Path.InvalidPathChars) >= 0)
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return false;
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// on Moonlight this does not throw but returns false
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if (!SecurityManager.CheckElevatedPermissions ())
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return false;
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MonoIOError error;
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return MonoIO.ExistsFile (path, out error);
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}
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#if !NET_2_1
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public static FileSecurity GetAccessControl (string path)
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{
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// AccessControlSections.Audit requires special permissions.
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return GetAccessControl (path,
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AccessControlSections.Owner |
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AccessControlSections.Group |
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AccessControlSections.Access);
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}
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public static FileSecurity GetAccessControl (string path, AccessControlSections includeSections)
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{
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return new FileSecurity (path, includeSections);
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}
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#endif
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public static FileAttributes GetAttributes (string path)
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{
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Path.Validate (path);
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SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
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MonoIOError error;
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FileAttributes attrs;
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attrs = MonoIO.GetFileAttributes (path, out error);
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if (error != MonoIOError.ERROR_SUCCESS)
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throw MonoIO.GetException (path, error);
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return attrs;
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}
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public static DateTime GetCreationTime (string path)
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{
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MonoIOStat stat;
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MonoIOError error;
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Path.Validate (path);
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SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
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if (!MonoIO.GetFileStat (path, out stat, out error)) {
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if (error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_FILE_NOT_FOUND)
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return DefaultLocalFileTime;
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else
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throw new IOException (path);
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}
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return DateTime.FromFileTime (stat.CreationTime);
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}
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public static DateTime GetCreationTimeUtc (string path)
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{
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return GetCreationTime (path).ToUniversalTime ();
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}
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public static DateTime GetLastAccessTime (string path)
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{
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MonoIOStat stat;
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MonoIOError error;
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Path.Validate (path);
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SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
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if (!MonoIO.GetFileStat (path, out stat, out error)) {
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if (error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_FILE_NOT_FOUND)
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return DefaultLocalFileTime;
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else
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throw new IOException (path);
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}
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return DateTime.FromFileTime (stat.LastAccessTime);
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}
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public static DateTime GetLastAccessTimeUtc (string path)
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{
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return GetLastAccessTime (path).ToUniversalTime ();
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}
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public static DateTime GetLastWriteTime (string path)
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{
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MonoIOStat stat;
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MonoIOError error;
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Path.Validate (path);
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SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
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if (!MonoIO.GetFileStat (path, out stat, out error)) {
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if (error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_FILE_NOT_FOUND)
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return DefaultLocalFileTime;
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else
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throw new IOException (path);
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}
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return DateTime.FromFileTime (stat.LastWriteTime);
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}
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public static DateTime GetLastWriteTimeUtc (string path)
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{
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return GetLastWriteTime (path).ToUniversalTime ();
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}
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public static void Move (string sourceFileName, string destFileName)
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{
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if (sourceFileName == null)
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throw new ArgumentNullException ("sourceFileName");
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if (destFileName == null)
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throw new ArgumentNullException ("destFileName");
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if (sourceFileName.Length == 0)
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throw new ArgumentException ("An empty file name is not valid.", "sourceFileName");
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if (sourceFileName.Trim ().Length == 0 || sourceFileName.IndexOfAny (Path.InvalidPathChars) != -1)
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throw new ArgumentException ("The file name is not valid.");
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if (destFileName.Length == 0)
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throw new ArgumentException ("An empty file name is not valid.", "destFileName");
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if (destFileName.Trim ().Length == 0 || destFileName.IndexOfAny (Path.InvalidPathChars) != -1)
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throw new ArgumentException ("The file name is not valid.");
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SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
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MonoIOError error;
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if (!MonoIO.Exists (sourceFileName, out error))
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throw new FileNotFoundException (Locale.GetText ("{0} does not exist", sourceFileName), sourceFileName);
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// Don't check for this error here to allow the runtime
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// to check if sourceFileName and destFileName are equal.
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// Comparing sourceFileName and destFileName is not enough.
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//if (MonoIO.Exists (destFileName, out error))
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// throw new IOException (Locale.GetText ("{0} already exists", destFileName));
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string DirName;
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DirName = Path.GetDirectoryName (destFileName);
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if (DirName != String.Empty && !Directory.Exists (DirName))
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throw new DirectoryNotFoundException (Locale.GetText ("Could not find a part of the path."));
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if (!MonoIO.MoveFile (sourceFileName, destFileName, out error)) {
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if (error == MonoIOError.ERROR_ALREADY_EXISTS)
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throw MonoIO.GetException (error);
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else if (error == MonoIOError.ERROR_SHARING_VIOLATION)
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throw MonoIO.GetException (sourceFileName, error);
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throw MonoIO.GetException (error);
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}
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}
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public static FileStream Open (string path, FileMode mode)
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{
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return new FileStream (path, mode, mode == FileMode.Append ? FileAccess.Write : FileAccess.ReadWrite, FileShare.None);
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}
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public static FileStream Open (string path, FileMode mode, FileAccess access)
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{
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return new FileStream (path, mode, access, FileShare.None);
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}
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public static FileStream Open (string path, FileMode mode, FileAccess access,
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FileShare share)
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{
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return new FileStream (path, mode, access, share);
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}
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public static FileStream OpenRead (string path)
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{
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return new FileStream (path, FileMode.Open, FileAccess.Read, FileShare.Read);
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}
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public static StreamReader OpenText (string path)
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{
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return new StreamReader (path);
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}
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public static FileStream OpenWrite (string path)
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{
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return new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None);
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}
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public static void Replace (string sourceFileName,
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string destinationFileName,
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string destinationBackupFileName)
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{
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Replace (sourceFileName, destinationFileName, destinationBackupFileName, false);
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}
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public static void Replace (string sourceFileName,
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string destinationFileName,
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string destinationBackupFileName,
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bool ignoreMetadataErrors)
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{
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MonoIOError error;
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if (sourceFileName == null)
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throw new ArgumentNullException ("sourceFileName");
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if (destinationFileName == null)
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throw new ArgumentNullException ("destinationFileName");
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if (sourceFileName.Trim ().Length == 0 || sourceFileName.IndexOfAny (Path.InvalidPathChars) != -1)
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throw new ArgumentException ("sourceFileName");
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if (destinationFileName.Trim ().Length == 0 || destinationFileName.IndexOfAny (Path.InvalidPathChars) != -1)
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throw new ArgumentException ("destinationFileName");
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string fullSource = Path.GetFullPath (sourceFileName);
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string fullDest = Path.GetFullPath (destinationFileName);
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if (MonoIO.ExistsDirectory (fullSource, out error))
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throw new IOException (Locale.GetText ("{0} is a directory", sourceFileName));
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if (MonoIO.ExistsDirectory (fullDest, out error))
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throw new IOException (Locale.GetText ("{0} is a directory", destinationFileName));
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if (!Exists (fullSource))
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throw new FileNotFoundException (Locale.GetText ("{0} does not exist", sourceFileName),
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sourceFileName);
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if (!Exists (fullDest))
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throw new FileNotFoundException (Locale.GetText ("{0} does not exist", destinationFileName),
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destinationFileName);
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if (fullSource == fullDest)
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throw new IOException (Locale.GetText ("Source and destination arguments are the same file."));
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string fullBackup = null;
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if (destinationBackupFileName != null) {
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if (destinationBackupFileName.Trim ().Length == 0 ||
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destinationBackupFileName.IndexOfAny (Path.InvalidPathChars) != -1)
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throw new ArgumentException ("destinationBackupFileName");
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fullBackup = Path.GetFullPath (destinationBackupFileName);
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if (MonoIO.ExistsDirectory (fullBackup, out error))
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throw new IOException (Locale.GetText ("{0} is a directory", destinationBackupFileName));
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if (fullSource == fullBackup)
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throw new IOException (Locale.GetText ("Source and backup arguments are the same file."));
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if (fullDest == fullBackup)
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throw new IOException (Locale.GetText (
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"Destination and backup arguments are the same file."));
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}
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if (!MonoIO.ReplaceFile (fullSource, fullDest, fullBackup,
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ignoreMetadataErrors, out error)) {
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throw MonoIO.GetException (error);
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}
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}
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#if !NET_2_1
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public static void SetAccessControl (string path,
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FileSecurity fileSecurity)
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{
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if (null == fileSecurity)
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throw new ArgumentNullException ("fileSecurity");
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fileSecurity.PersistModifications (path);
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}
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#endif
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public static void SetAttributes (string path,
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FileAttributes fileAttributes)
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{
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MonoIOError error;
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Path.Validate (path);
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if (!MonoIO.SetFileAttributes (path, fileAttributes, out error))
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throw MonoIO.GetException (path, error);
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}
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public static void SetCreationTime (string path, DateTime creationTime)
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{
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MonoIOError error;
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Path.Validate (path);
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if (!MonoIO.Exists (path, out error))
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throw MonoIO.GetException (path, error);
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if (!MonoIO.SetCreationTime (path, creationTime, out error))
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throw MonoIO.GetException (path, error);
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}
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public static void SetCreationTimeUtc (string path, DateTime creationTimeUtc)
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{
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SetCreationTime (path, creationTimeUtc.ToLocalTime ());
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}
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public static void SetLastAccessTime (string path, DateTime lastAccessTime)
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{
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MonoIOError error;
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Path.Validate (path);
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if (!MonoIO.Exists (path, out error))
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throw MonoIO.GetException (path, error);
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if (!MonoIO.SetLastAccessTime (path, lastAccessTime, out error))
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throw MonoIO.GetException (path, error);
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}
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public static void SetLastAccessTimeUtc (string path, DateTime lastAccessTimeUtc)
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{
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SetLastAccessTime (path, lastAccessTimeUtc.ToLocalTime ());
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}
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public static void SetLastWriteTime (string path,
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DateTime lastWriteTime)
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{
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MonoIOError error;
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Path.Validate (path);
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if (!MonoIO.Exists (path, out error))
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throw MonoIO.GetException (path, error);
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if (!MonoIO.SetLastWriteTime (path, lastWriteTime, out error))
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throw MonoIO.GetException (path, error);
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}
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public static void SetLastWriteTimeUtc (string path,
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DateTime lastWriteTimeUtc)
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{
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SetLastWriteTime (path, lastWriteTimeUtc.ToLocalTime ());
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}
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//
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// The documentation for this method is most likely wrong, it
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// talks about doing a "binary read", but the remarks say
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// that this "detects the encoding".
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//
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// This can not detect and do anything useful with the encoding
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// since the result is a byte [] not a char [].
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//
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public static byte [] ReadAllBytes (string path)
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{
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using (FileStream s = OpenRead (path)) {
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long size = s.Length;
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// limited to 2GB according to http://msdn.microsoft.com/en-us/library/system.io.file.readallbytes.aspx
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if (size > Int32.MaxValue)
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throw new IOException ("Reading more than 2GB with this call is not supported");
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int pos = 0;
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int count = (int) size;
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byte [] result = new byte [size];
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while (count > 0) {
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int n = s.Read (result, pos, count);
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if (n == 0)
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throw new IOException ("Unexpected end of stream");
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pos += n;
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count -= n;
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}
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return result;
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}
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}
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public static string [] ReadAllLines (string path)
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{
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using (StreamReader reader = File.OpenText (path)) {
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return ReadAllLines (reader);
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}
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}
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public static string [] ReadAllLines (string path, Encoding encoding)
|
|
{
|
|
using (StreamReader reader = new StreamReader (path, encoding)) {
|
|
return ReadAllLines (reader);
|
|
}
|
|
}
|
|
|
|
static string [] ReadAllLines (StreamReader reader)
|
|
{
|
|
List<string> list = new List<string> ();
|
|
while (!reader.EndOfStream)
|
|
list.Add (reader.ReadLine ());
|
|
return list.ToArray ();
|
|
}
|
|
|
|
public static string ReadAllText (string path)
|
|
{
|
|
using (StreamReader sr = new StreamReader (path)) {
|
|
return sr.ReadToEnd ();
|
|
}
|
|
}
|
|
|
|
public static string ReadAllText (string path, Encoding encoding)
|
|
{
|
|
using (StreamReader sr = new StreamReader (path, encoding)) {
|
|
return sr.ReadToEnd ();
|
|
}
|
|
}
|
|
|
|
public static void WriteAllBytes (string path, byte [] bytes)
|
|
{
|
|
using (Stream stream = File.Create (path)) {
|
|
stream.Write (bytes, 0, bytes.Length);
|
|
}
|
|
}
|
|
|
|
public static void WriteAllLines (string path, string [] contents)
|
|
{
|
|
using (StreamWriter writer = new StreamWriter (path)) {
|
|
WriteAllLines (writer, contents);
|
|
}
|
|
}
|
|
|
|
public static void WriteAllLines (string path, string [] contents, Encoding encoding)
|
|
{
|
|
using (StreamWriter writer = new StreamWriter (path, false, encoding)) {
|
|
WriteAllLines (writer, contents);
|
|
}
|
|
}
|
|
|
|
static void WriteAllLines (StreamWriter writer, string [] contents)
|
|
{
|
|
foreach (string line in contents)
|
|
writer.WriteLine (line);
|
|
}
|
|
|
|
public static void WriteAllText (string path, string contents)
|
|
{
|
|
WriteAllText (path, contents, EncodingHelper.UTF8Unmarked);
|
|
}
|
|
|
|
public static void WriteAllText (string path, string contents, Encoding encoding)
|
|
{
|
|
using (StreamWriter sw = new StreamWriter (path, false, encoding)) {
|
|
sw.Write (contents);
|
|
}
|
|
}
|
|
|
|
static DateTime? defaultLocalFileTime;
|
|
static DateTime DefaultLocalFileTime {
|
|
get {
|
|
if (defaultLocalFileTime == null)
|
|
defaultLocalFileTime = new DateTime (1601, 1, 1).ToLocalTime ();
|
|
|
|
return defaultLocalFileTime.Value;
|
|
}
|
|
}
|
|
|
|
|
|
[MonoLimitation ("File encryption isn't supported (even on NTFS).")]
|
|
public static void Encrypt (string path)
|
|
{
|
|
// MS.NET support this only on NTFS file systems, i.e. it's a file-system (not a framework) feature.
|
|
// otherwise it throws a NotSupportedException (or a PlatformNotSupportedException on older OS).
|
|
// we throw the same (instead of a NotImplementedException) because most code should already be
|
|
// handling this exception to work properly.
|
|
throw new NotSupportedException (Locale.GetText ("File encryption isn't supported on any file system."));
|
|
}
|
|
|
|
[MonoLimitation ("File encryption isn't supported (even on NTFS).")]
|
|
public static void Decrypt (string path)
|
|
{
|
|
// MS.NET support this only on NTFS file systems, i.e. it's a file-system (not a framework) feature.
|
|
// otherwise it throws a NotSupportedException (or a PlatformNotSupportedException on older OS).
|
|
// we throw the same (instead of a NotImplementedException) because most code should already be
|
|
// handling this exception to work properly.
|
|
throw new NotSupportedException (Locale.GetText ("File encryption isn't supported on any file system."));
|
|
}
|
|
|
|
public static IEnumerable<string> ReadLines (string path)
|
|
{
|
|
return ReadLines (File.OpenText (path));
|
|
}
|
|
|
|
public static IEnumerable<string> ReadLines (string path, Encoding encoding)
|
|
{
|
|
return ReadLines (new StreamReader (path, encoding));
|
|
}
|
|
|
|
// refactored in order to avoid compiler-generated names for Moonlight tools
|
|
static IEnumerable<string> ReadLines (StreamReader reader)
|
|
{
|
|
using (reader) {
|
|
string s;
|
|
while ((s = reader.ReadLine ()) != null) {
|
|
yield return s;
|
|
}
|
|
}
|
|
}
|
|
|
|
public static void AppendAllLines (string path, IEnumerable<string> contents)
|
|
{
|
|
Path.Validate (path);
|
|
|
|
if (contents == null)
|
|
return;
|
|
|
|
using (TextWriter w = new StreamWriter (path, true)) {
|
|
foreach (var line in contents)
|
|
w.WriteLine (line);
|
|
}
|
|
}
|
|
|
|
public static void AppendAllLines (string path, IEnumerable<string> contents, Encoding encoding)
|
|
{
|
|
Path.Validate (path);
|
|
|
|
if (contents == null)
|
|
return;
|
|
|
|
using (TextWriter w = new StreamWriter (path, true, encoding)) {
|
|
foreach (var line in contents)
|
|
w.WriteLine (line);
|
|
}
|
|
}
|
|
|
|
public static void WriteAllLines (string path, IEnumerable<string> contents)
|
|
{
|
|
Path.Validate (path);
|
|
|
|
if (contents == null)
|
|
return;
|
|
|
|
using (TextWriter w = new StreamWriter (path, false)) {
|
|
foreach (var line in contents)
|
|
w.WriteLine (line);
|
|
}
|
|
}
|
|
|
|
public static void WriteAllLines (string path, IEnumerable<string> contents, Encoding encoding)
|
|
{
|
|
Path.Validate (path);
|
|
|
|
if (contents == null)
|
|
return;
|
|
|
|
using (TextWriter w = new StreamWriter (path, false, encoding)) {
|
|
foreach (var line in contents)
|
|
w.WriteLine (line);
|
|
}
|
|
}
|
|
}
|
|
}
|