328 lines
9.2 KiB
C#
328 lines
9.2 KiB
C#
//------------------------------------------------------------------------------
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//
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// System.IO.FileInfo.cs
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//
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// Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
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//
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// Author: Jim Richardson, develop@wtfo-guru.com
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// Dan Lewis (dihlewis@yahoo.co.uk)
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// Created: Monday, August 13, 2001
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//
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//------------------------------------------------------------------------------
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//
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// Copyright (C) 2004, 2006 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.Runtime.InteropServices;
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using System.Runtime.Serialization;
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using System.Security;
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#if !MOBILE
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using System.Security.AccessControl;
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#endif
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namespace System.IO {
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[Serializable]
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[ComVisible (true)]
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public sealed class FileInfo : FileSystemInfo
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{
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private bool exists;
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public FileInfo (string fileName)
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{
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if (fileName == null)
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throw new ArgumentNullException ("fileName");
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CheckPath (fileName);
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SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
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OriginalPath = fileName;
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FullPath = Path.GetFullPath (fileName);
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}
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private FileInfo (SerializationInfo info, StreamingContext context)
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: base (info, context)
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{
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}
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internal override void InternalRefresh ()
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{
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exists = File.Exists (FullPath);
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}
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// public properties
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public override bool Exists {
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get {
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Refresh (false);
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if (stat.Attributes == MonoIO.InvalidFileAttributes)
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return false;
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if ((stat.Attributes & FileAttributes.Directory) != 0)
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return false;
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return exists;
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}
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}
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public override string Name {
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get {
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return Path.GetFileName (FullPath);
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}
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}
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public bool IsReadOnly {
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get {
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if (!Exists)
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throw new FileNotFoundException ("Could not find file \"" + OriginalPath + "\".", OriginalPath);
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return ((stat.Attributes & FileAttributes.ReadOnly) != 0);
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}
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set {
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if (!Exists)
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throw new FileNotFoundException ("Could not find file \"" + OriginalPath + "\".", OriginalPath);
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FileAttributes attrs = File.GetAttributes(FullPath);
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if (value)
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attrs |= FileAttributes.ReadOnly;
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else
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attrs &= ~FileAttributes.ReadOnly;
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File.SetAttributes(FullPath, attrs);
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}
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}
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[MonoLimitation ("File encryption isn't supported (even on NTFS).")]
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[ComVisible (false)]
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public void Encrypt ()
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{
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// MS.NET support this only on NTFS file systems, i.e. it's a file-system (not a framework) feature.
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// otherwise it throws a NotSupportedException (or a PlatformNotSupportedException on older OS).
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// we throw the same (instead of a NotImplementedException) because most code should already be
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// handling this exception to work properly.
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throw new NotSupportedException (Locale.GetText ("File encryption isn't supported on any file system."));
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}
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[MonoLimitation ("File encryption isn't supported (even on NTFS).")]
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[ComVisible (false)]
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public void Decrypt ()
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{
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// MS.NET support this only on NTFS file systems, i.e. it's a file-system (not a framework) feature.
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// otherwise it throws a NotSupportedException (or a PlatformNotSupportedException on older OS).
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// we throw the same (instead of a NotImplementedException) because most code should already be
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// handling this exception to work properly.
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throw new NotSupportedException (Locale.GetText ("File encryption isn't supported on any file system."));
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}
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public long Length {
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get {
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if (!Exists)
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throw new FileNotFoundException ("Could not find file \"" + OriginalPath + "\".", OriginalPath);
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return stat.Length;
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}
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}
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public string DirectoryName {
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get {
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return Path.GetDirectoryName (FullPath);
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}
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}
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public DirectoryInfo Directory {
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get {
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return new DirectoryInfo (DirectoryName);
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}
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}
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// streamreader methods
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public StreamReader OpenText ()
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{
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return new StreamReader (Open (FileMode.Open, FileAccess.Read));
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}
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public StreamWriter CreateText ()
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{
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return new StreamWriter (Open (FileMode.Create, FileAccess.Write));
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}
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public StreamWriter AppendText ()
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{
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return new StreamWriter (Open (FileMode.Append, FileAccess.Write));
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}
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// filestream methods
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public FileStream Create ()
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{
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return File.Create (FullPath);
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}
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public FileStream OpenRead ()
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{
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return Open (FileMode.Open, FileAccess.Read, FileShare.Read);
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}
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public FileStream OpenWrite ()
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{
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return Open (FileMode.OpenOrCreate, FileAccess.Write);
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}
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public FileStream Open (FileMode mode)
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{
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return Open (mode, FileAccess.ReadWrite);
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}
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public FileStream Open (FileMode mode, FileAccess access)
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{
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return Open (mode, access, FileShare.None);
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}
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public FileStream Open (FileMode mode, FileAccess access, FileShare share)
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{
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return new FileStream (FullPath, mode, access, share);
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}
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// file methods
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public override void Delete ()
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{
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MonoIOError error;
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SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
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if (!MonoIO.Exists (FullPath, out error))
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// a weird MS.NET behaviour
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return;
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if (MonoIO.ExistsDirectory (FullPath, out error))
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throw new UnauthorizedAccessException ("Access to the path \"" + FullPath + "\" is denied.");
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if (!MonoIO.DeleteFile (FullPath, out error))
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throw MonoIO.GetException (OriginalPath, error);
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}
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public void MoveTo (string destFileName)
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{
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if (destFileName == null)
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throw new ArgumentNullException ("destFileName");
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if (destFileName == Name || destFileName == FullName)
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return;
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if (!File.Exists (FullPath))
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throw new FileNotFoundException ();
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File.Move (FullPath, destFileName);
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this.FullPath = Path.GetFullPath (destFileName);
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}
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public FileInfo CopyTo (string destFileName)
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{
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return CopyTo (destFileName, false);
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}
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public FileInfo CopyTo (string destFileName, bool overwrite)
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{
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if (destFileName == null)
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throw new ArgumentNullException ("destFileName");
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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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string dest = Path.GetFullPath (destFileName);
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if (overwrite && File.Exists (dest))
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File.Delete (dest);
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File.Copy (FullPath, dest);
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return new FileInfo (dest);
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}
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public override string ToString ()
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{
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return OriginalPath;
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}
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#if !MOBILE
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public FileSecurity GetAccessControl ()
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{
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return File.GetAccessControl (FullPath);
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}
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public FileSecurity GetAccessControl (AccessControlSections includeSections)
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{
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return File.GetAccessControl (FullPath, includeSections);
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}
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[ComVisible (false)]
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public FileInfo Replace (string destinationFileName,
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string destinationBackupFileName)
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{
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string destinationFullPath = null;
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if (!Exists)
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throw new FileNotFoundException ();
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if (destinationFileName == null)
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throw new ArgumentNullException ("destinationFileName");
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if (destinationFileName.Length == 0)
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throw new ArgumentException ("An empty file name is not valid.", "destinationFileName");
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destinationFullPath = Path.GetFullPath (destinationFileName);
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if (!File.Exists (destinationFullPath))
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throw new FileNotFoundException ();
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FileAttributes attrs = File.GetAttributes (destinationFullPath);
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if ( (attrs & FileAttributes.ReadOnly) == FileAttributes.ReadOnly)
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throw new UnauthorizedAccessException ();
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if (destinationBackupFileName != null) {
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if (destinationBackupFileName.Length == 0)
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throw new ArgumentException ("An empty file name is not valid.", "destinationBackupFileName");
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File.Copy (destinationFullPath, Path.GetFullPath (destinationBackupFileName), true);
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}
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File.Copy (FullPath, destinationFullPath,true);
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File.Delete (FullPath);
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return new FileInfo (destinationFullPath);
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}
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[ComVisible (false)]
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[MonoLimitation ("We ignore the ignoreMetadataErrors parameter")]
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public FileInfo Replace (string destinationFileName,
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string destinationBackupFileName,
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bool ignoreMetadataErrors)
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{
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return Replace (destinationFileName, destinationBackupFileName);
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}
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public void SetAccessControl (FileSecurity fileSecurity)
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{
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File.SetAccessControl (FullPath, fileSecurity);
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}
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#endif
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}
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}
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