mcs/class/corlib/System.IO/File.cs

   1 //
   2 // System.IO.File.cs
   3 //
   4 //
   5 // Authors:
   6 //   Miguel de Icaza (miguel@ximian.com)
   7 //   Jim Richardson  (develop@wtfo-guru.com)
   8 //   Dan Lewis       (dihlewis@yahoo.co.uk)
   9 //   Ville Palo      (vi64pa@kolumbus.fi)
  10 //
  11 // Copyright 2002 Ximian, Inc. http://www.ximian.com
  12 // Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
  13 // Copyright (C) 2004, 2006, 2010 Novell, Inc (http://www.novell.com)
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System;
  36 using System.Collections.Generic;
  37 using System.Diagnostics;
  38 using System.Security;
  39 using System.Text;
  40 using System.Runtime.InteropServices;
  41
  42 #if !NET_2_1
  43 using System.Security.AccessControl;
  44 #endif
  45
  46 namespace System.IO
  47 {
  48         [ComVisible (true)]
  49         public static class File
  50         {
  51                 public static void AppendAllText (string path, string contents)
  52                 {
  53                         using (TextWriter w = new StreamWriter (path, true)) {
  54                                 w.Write (contents);
  55                         }
  56                 }
  57
  58                 public static void AppendAllText (string path, string contents, Encoding encoding)
  59                 {
  60                         using (TextWriter w = new StreamWriter (path, true, encoding)) {
  61                                 w.Write (contents);
  62                         }
  63                 }
  64
  65                 public static StreamWriter AppendText (string path)
  66                 {
  67                         return new StreamWriter (path, true);
  68                 }
  69
  70                 public static void Copy (string sourceFileName, string destFileName)
  71                 {
  72                         Copy (sourceFileName, destFileName, false);
  73                 }
  74
  75                 public static void Copy (string sourceFileName, string destFileName, bool overwrite)
  76                 {
  77                         MonoIOError error;
  78
  79                         if (sourceFileName == null)
  80                                 throw new ArgumentNullException ("sourceFileName");
  81                         if (destFileName == null)
  82                                 throw new ArgumentNullException ("destFileName");
  83                         if (sourceFileName.Length == 0)
  84                                 throw new ArgumentException ("An empty file name is not valid.", "sourceFileName");
  85                         if (sourceFileName.Trim ().Length == 0 || sourceFileName.IndexOfAny (Path.InvalidPathChars) != -1)
  86                                 throw new ArgumentException ("The file name is not valid.");
  87                         if (destFileName.Length == 0)
  88                                 throw new ArgumentException ("An empty file name is not valid.", "destFileName");
  89                         if (destFileName.Trim ().Length == 0 || destFileName.IndexOfAny (Path.InvalidPathChars) != -1)
  90                                 throw new ArgumentException ("The file name is not valid.");
  91
  92                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
  93
  94                         if (!MonoIO.Exists (sourceFileName, out error))
  95                                 throw new FileNotFoundException (Locale.GetText ("{0} does not exist", sourceFileName), sourceFileName);
  96                         if ((GetAttributes (sourceFileName) & FileAttributes.Directory) == FileAttributes.Directory)
  97                                 throw new ArgumentException (Locale.GetText ("{0} is a directory", sourceFileName));
  98
  99                         if (MonoIO.Exists (destFileName, out error)) {
 100                                 if ((GetAttributes (destFileName) & FileAttributes.Directory) == FileAttributes.Directory)
 101                                         throw new ArgumentException (Locale.GetText ("{0} is a directory", destFileName));
 102                                 if (!overwrite)
 103                                         throw new IOException (Locale.GetText ("{0} already exists", destFileName));
 104                         }
 105
 106                         string DirName = Path.GetDirectoryName (destFileName);
 107                         if (DirName != String.Empty && !Directory.Exists (DirName))
 108                                 throw new DirectoryNotFoundException (Locale.GetText ("Destination directory not found: {0}",DirName));
 109
 110                         if (!MonoIO.CopyFile (sourceFileName, destFileName, overwrite, out error)) {
 111                                 string p = Locale.GetText ("{0}\" or \"{1}", sourceFileName, destFileName);
 112                                 throw MonoIO.GetException (p, error);
 113                         }
 114                 }
 115
 116                 internal static String InternalCopy (String sourceFileName, String destFileName, bool overwrite, bool checkHost)
 117                 {
 118                         String fullSourceFileName = Path.GetFullPathInternal(sourceFileName);
 119                         String fullDestFileName = Path.GetFullPathInternal(destFileName);
 120
 121                         MonoIOError error;
 122
 123                         if (!MonoIO.CopyFile (fullSourceFileName, fullDestFileName, overwrite, out error)) {
 124                                 string p = Locale.GetText ("{0}\" or \"{1}", sourceFileName, destFileName);
 125                                 throw MonoIO.GetException (p, error);
 126                         }
 127
 128                         return fullDestFileName;
 129                 }
 130
 131                 public static FileStream Create (string path)
 132                 {
 133                         return Create (path, 8192);
 134                 }
 135
 136                 public static FileStream Create (string path, int bufferSize)
 137                 {
 138                         return new FileStream (path, FileMode.Create, FileAccess.ReadWrite,
 139                                 FileShare.None, bufferSize);
 140                 }
 141
 142                 [MonoLimitation ("FileOptions are ignored")]
 143                 public static FileStream Create (string path, int bufferSize,
 144                                                  FileOptions options)
 145                 {
 146                         return new FileStream (path, FileMode.Create, FileAccess.ReadWrite,
 147                                 FileShare.None, bufferSize, options);
 148                 }
 149
 150 #if !NET_2_1
 151                 [MonoLimitation ("FileOptions and FileSecurity are ignored")]
 152                 public static FileStream Create (string path, int bufferSize,
 153                                                  FileOptions options,
 154                                                  FileSecurity fileSecurity)
 155                 {
 156                         return new FileStream (path, FileMode.Create, FileAccess.ReadWrite,
 157                                 FileShare.None, bufferSize, options);
 158                 }
 159 #endif
 160
 161                 public static StreamWriter CreateText (string path)
 162                 {
 163                         return new StreamWriter (path, false);
 164                 }
 165
 166                 public static void Delete (string path)
 167                 {
 168                         Path.Validate (path);
 169                         if (Directory.Exists (path))
 170                                 throw new UnauthorizedAccessException(Locale.GetText ("{0} is a directory", path));
 171
 172                         string DirName = Path.GetDirectoryName(path);
 173                         if (DirName != String.Empty && !Directory.Exists (DirName))
 174                                 throw new DirectoryNotFoundException (Locale.GetText ("Could not find a part of the path \"{0}\".", path));
 175
 176                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 177
 178                         MonoIOError error;
 179
 180                         if (!MonoIO.DeleteFile (path, out error)){
 181                                 if (error != MonoIOError.ERROR_FILE_NOT_FOUND)
 182                                         throw MonoIO.GetException (path, error);
 183                         }
 184                 }
 185
 186                 public static bool Exists (string path)
 187                 {
 188                         // For security reasons no exceptions are
 189                         // thrown, only false is returned if there is
 190                         // any problem with the path or permissions.
 191                         // Minimizes what information can be
 192                         // discovered by using this method.
 193                         if (String.IsNullOrWhiteSpace (path) || path.IndexOfAny(Path.InvalidPathChars) >= 0)
 194                                 return false;
 195
 196                         // on Moonlight this does not throw but returns false
 197                         if (!SecurityManager.CheckElevatedPermissions ())
 198                                 return false;
 199
 200                         MonoIOError error;
 201                         return MonoIO.ExistsFile (path, out error);
 202                 }
 203
 204 #if !NET_2_1
 205                 public static FileSecurity GetAccessControl (string path)
 206                 {
 207                         // AccessControlSections.Audit requires special permissions.
 208                         return GetAccessControl (path,
 209                                                  AccessControlSections.Owner |
 210                                                  AccessControlSections.Group |
 211                                                  AccessControlSections.Access);
 212                 }
 213
 214                 public static FileSecurity GetAccessControl (string path, AccessControlSections includeSections)
 215                 {
 216                         return new FileSecurity (path, includeSections);
 217                 }
 218 #endif
 219
 220                 public static FileAttributes GetAttributes (string path)
 221                 {
 222                         Path.Validate (path);
 223                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 224
 225                         MonoIOError error;
 226                         FileAttributes attrs;
 227
 228                         attrs = MonoIO.GetFileAttributes (path, out error);
 229                         if (error != MonoIOError.ERROR_SUCCESS)
 230                                 throw MonoIO.GetException (path, error);
 231                         return attrs;
 232                 }
 233
 234                 public static DateTime GetCreationTime (string path)
 235                 {
 236                         MonoIOStat stat;
 237                         MonoIOError error;
 238                         Path.Validate (path);
 239                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 240
 241                         if (!MonoIO.GetFileStat (path, out stat, out error)) {
 242                                 if (error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_FILE_NOT_FOUND)
 243                                         return DefaultLocalFileTime;
 244                                 else
 245                                         throw new IOException (path);
 246                         }
 247                         return DateTime.FromFileTime (stat.CreationTime);
 248                 }
 249
 250                 public static DateTime GetCreationTimeUtc (string path)
 251                 {
 252                         return GetCreationTime (path).ToUniversalTime ();
 253                 }
 254
 255                 public static DateTime GetLastAccessTime (string path)
 256                 {
 257                         MonoIOStat stat;
 258                         MonoIOError error;
 259                         Path.Validate (path);
 260                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 261
 262                         if (!MonoIO.GetFileStat (path, out stat, out error)) {
 263                                 if (error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_FILE_NOT_FOUND)
 264                                         return DefaultLocalFileTime;
 265                                 else
 266                                         throw new IOException (path);
 267                         }
 268                         return DateTime.FromFileTime (stat.LastAccessTime);
 269                 }
 270
 271                 public static DateTime GetLastAccessTimeUtc (string path)
 272                 {
 273                         return GetLastAccessTime (path).ToUniversalTime ();
 274                 }
 275
 276                 public static DateTime GetLastWriteTime (string path)
 277                 {
 278                         MonoIOStat stat;
 279                         MonoIOError error;
 280                         Path.Validate (path);
 281                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 282
 283                         if (!MonoIO.GetFileStat (path, out stat, out error)) {
 284                                 if (error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_FILE_NOT_FOUND)
 285                                         return DefaultLocalFileTime;
 286                                 else
 287                                         throw new IOException (path);
 288                         }
 289                         return DateTime.FromFileTime (stat.LastWriteTime);
 290                 }
 291
 292                 public static DateTime GetLastWriteTimeUtc (string path)
 293                 {
 294                         return GetLastWriteTime (path).ToUniversalTime ();
 295                 }
 296
 297                 public static void Move (string sourceFileName, string destFileName)
 298                 {
 299                         if (sourceFileName == null)
 300                                 throw new ArgumentNullException ("sourceFileName");
 301                         if (destFileName == null)
 302                                 throw new ArgumentNullException ("destFileName");
 303                         if (sourceFileName.Length == 0)
 304                                 throw new ArgumentException ("An empty file name is not valid.", "sourceFileName");
 305                         if (sourceFileName.Trim ().Length == 0 || sourceFileName.IndexOfAny (Path.InvalidPathChars) != -1)
 306                                 throw new ArgumentException ("The file name is not valid.");
 307                         if (destFileName.Length == 0)
 308                                 throw new ArgumentException ("An empty file name is not valid.", "destFileName");
 309                         if (destFileName.Trim ().Length == 0 || destFileName.IndexOfAny (Path.InvalidPathChars) != -1)
 310                                 throw new ArgumentException ("The file name is not valid.");
 311
 312                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
 313
 314                         MonoIOError error;
 315                         if (!MonoIO.Exists (sourceFileName, out error))
 316                                 throw new FileNotFoundException (Locale.GetText ("{0} does not exist", sourceFileName), sourceFileName);
 317
 318                         // Don't check for this error here to allow the runtime
 319                         // to check if sourceFileName and destFileName are equal.
 320                         // Comparing sourceFileName and destFileName is not enough.
 321                         //if (MonoIO.Exists (destFileName, out error))
 322                         //      throw new IOException (Locale.GetText ("{0} already exists", destFileName));
 323
 324                         string DirName;
 325                         DirName = Path.GetDirectoryName (destFileName);
 326                         if (DirName != String.Empty && !Directory.Exists (DirName))
 327                                 throw new DirectoryNotFoundException (Locale.GetText ("Could not find a part of the path."));
 328
 329                         if (!MonoIO.MoveFile (sourceFileName, destFileName, out error)) {
 330                                 if (error == MonoIOError.ERROR_ALREADY_EXISTS)
 331                                         throw MonoIO.GetException (error);
 332                                 else if (error == MonoIOError.ERROR_SHARING_VIOLATION)
 333                                         throw MonoIO.GetException (sourceFileName, error);
 334
 335                                 throw MonoIO.GetException (error);
 336                         }
 337                 }
 338
 339                 public static FileStream Open (string path, FileMode mode)
 340                 {
 341                         return new FileStream (path, mode, mode == FileMode.Append ? FileAccess.Write : FileAccess.ReadWrite, FileShare.None);
 342                 }
 343
 344                 public static FileStream Open (string path, FileMode mode, FileAccess access)
 345                 {
 346                         return new FileStream (path, mode, access, FileShare.None);
 347                 }
 348
 349                 public static FileStream Open (string path, FileMode mode, FileAccess access,
 350                                                FileShare share)
 351                 {
 352                         return new FileStream (path, mode, access, share);
 353                 }
 354
 355                 public static FileStream OpenRead (string path)
 356                 {
 357                         return new FileStream (path, FileMode.Open, FileAccess.Read, FileShare.Read);
 358                 }
 359
 360                 public static StreamReader OpenText (string path)
 361                 {
 362                         return new StreamReader (path);
 363                 }
 364
 365                 public static FileStream OpenWrite (string path)
 366                 {
 367                         return new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None);
 368                 }
 369
 370                 public static void Replace (string sourceFileName,
 371                                             string destinationFileName,
 372                                             string destinationBackupFileName)
 373                 {
 374                         Replace (sourceFileName, destinationFileName, destinationBackupFileName, false);
 375                 }
 376
 377                 public static void Replace (string sourceFileName,
 378                                             string destinationFileName,
 379                                             string destinationBackupFileName,
 380                                             bool ignoreMetadataErrors)
 381                 {
 382                         MonoIOError error;
 383
 384                         if (sourceFileName == null)
 385                                 throw new ArgumentNullException ("sourceFileName");
 386                         if (destinationFileName == null)
 387                                 throw new ArgumentNullException ("destinationFileName");
 388                         if (sourceFileName.Trim ().Length == 0 || sourceFileName.IndexOfAny (Path.InvalidPathChars) != -1)
 389                                 throw new ArgumentException ("sourceFileName");
 390                         if (destinationFileName.Trim ().Length == 0 || destinationFileName.IndexOfAny (Path.InvalidPathChars) != -1)
 391                                 throw new ArgumentException ("destinationFileName");
 392
 393                         string fullSource = Path.GetFullPath (sourceFileName);
 394                         string fullDest = Path.GetFullPath (destinationFileName);
 395                         if (MonoIO.ExistsDirectory (fullSource, out error))
 396                                 throw new IOException (Locale.GetText ("{0} is a directory", sourceFileName));
 397                         if (MonoIO.ExistsDirectory (fullDest, out error))
 398                                 throw new IOException (Locale.GetText ("{0} is a directory", destinationFileName));
 399
 400                         if (!Exists (fullSource))
 401                                 throw new FileNotFoundException (Locale.GetText ("{0} does not exist", sourceFileName),
 402                                                                  sourceFileName);
 403                         if (!Exists (fullDest))
 404                                 throw new FileNotFoundException (Locale.GetText ("{0} does not exist", destinationFileName),
 405                                                                  destinationFileName);
 406                         if (fullSource == fullDest)
 407                                 throw new IOException (Locale.GetText ("Source and destination arguments are the same file."));
 408
 409                         string fullBackup = null;
 410                         if (destinationBackupFileName != null) {
 411                                 if (destinationBackupFileName.Trim ().Length == 0 ||
 412                                     destinationBackupFileName.IndexOfAny (Path.InvalidPathChars) != -1)
 413                                         throw new ArgumentException ("destinationBackupFileName");
 414
 415                                 fullBackup = Path.GetFullPath (destinationBackupFileName);
 416                                 if (MonoIO.ExistsDirectory (fullBackup, out error))
 417                                         throw new IOException (Locale.GetText ("{0} is a directory", destinationBackupFileName));
 418                                 if (fullSource == fullBackup)
 419                                         throw new IOException (Locale.GetText ("Source and backup arguments are the same file."));
 420                                 if (fullDest == fullBackup)
 421                                         throw new IOException (Locale.GetText (
 422                                                                "Destination and backup arguments are the same file."));
 423                         }
 424
 425                         var attrs = GetAttributes (fullDest);
 426
 427                         // TODO: Should be done in wapi, win32 api handles this already
 428                         if ((attrs & FileAttributes.ReadOnly) != 0)
 429                                 throw MonoIO.GetException (MonoIOError.ERROR_ACCESS_DENIED);
 430
 431                         if (!MonoIO.ReplaceFile (fullSource, fullDest, fullBackup,
 432                                                  ignoreMetadataErrors, out error)) {
 433                                 throw MonoIO.GetException (error);
 434                         }
 435                 }
 436
 437 #if !NET_2_1
 438                 public static void SetAccessControl (string path,
 439                                                      FileSecurity fileSecurity)
 440                 {
 441                         if (null == fileSecurity)
 442                                 throw new ArgumentNullException ("fileSecurity");
 443
 444                         fileSecurity.PersistModifications (path);
 445                 }
 446 #endif
 447
 448                 public static void SetAttributes (string path,
 449                                                   FileAttributes fileAttributes)
 450                 {
 451                         MonoIOError error;
 452                         Path.Validate (path);
 453
 454                         if (!MonoIO.SetFileAttributes (path, fileAttributes, out error))
 455                                 throw MonoIO.GetException (path, error);
 456                 }
 457
 458                 public static void SetCreationTime (string path, DateTime creationTime)
 459                 {
 460                         MonoIOError error;
 461                         Path.Validate (path);
 462                         if (!MonoIO.Exists (path, out error))
 463                                 throw MonoIO.GetException (path, error);
 464                         if (!MonoIO.SetCreationTime (path, creationTime, out error))
 465                                 throw MonoIO.GetException (path, error);
 466                 }
 467
 468                 public static void SetCreationTimeUtc (string path, DateTime creationTimeUtc)
 469                 {
 470                         SetCreationTime (path, creationTimeUtc.ToLocalTime ());
 471                 }
 472
 473                 public static void SetLastAccessTime (string path, DateTime lastAccessTime)
 474                 {
 475                         MonoIOError error;
 476                         Path.Validate (path);
 477                         if (!MonoIO.Exists (path, out error))
 478                                 throw MonoIO.GetException (path, error);
 479                         if (!MonoIO.SetLastAccessTime (path, lastAccessTime, out error))
 480                                 throw MonoIO.GetException (path, error);
 481                 }
 482
 483                 public static void SetLastAccessTimeUtc (string path, DateTime lastAccessTimeUtc)
 484                 {
 485                         SetLastAccessTime (path, lastAccessTimeUtc.ToLocalTime ());
 486                 }
 487
 488                 public static void SetLastWriteTime (string path,
 489                                                      DateTime lastWriteTime)
 490                 {
 491                         MonoIOError error;
 492                         Path.Validate (path);
 493                         if (!MonoIO.Exists (path, out error))
 494                                 throw MonoIO.GetException (path, error);
 495                         if (!MonoIO.SetLastWriteTime (path, lastWriteTime, out error))
 496                                 throw MonoIO.GetException (path, error);
 497                 }
 498
 499                 public static void SetLastWriteTimeUtc (string path,
 500                                                      DateTime lastWriteTimeUtc)
 501                 {
 502                         SetLastWriteTime (path, lastWriteTimeUtc.ToLocalTime ());
 503                 }
 504
 505                 //
 506                 // The documentation for this method is most likely wrong, it
 507                 // talks about doing a "binary read", but the remarks say
 508                 // that this "detects the encoding".
 509                 //
 510                 // This can not detect and do anything useful with the encoding
 511                 // since the result is a byte [] not a char [].
 512                 //
 513                 public static byte [] ReadAllBytes (string path)
 514                 {
 515                         using (FileStream s = OpenRead (path)) {
 516                                 long size = s.Length;
 517                                 // limited to 2GB according to http://msdn.microsoft.com/en-us/library/system.io.file.readallbytes.aspx
 518                                 if (size > Int32.MaxValue)
 519                                         throw new IOException ("Reading more than 2GB with this call is not supported");
 520
 521                                 int pos = 0;
 522                                 int count = (int) size;
 523                                 byte [] result = new byte [size];
 524                                 while (count > 0) {
 525                                         int n = s.Read (result, pos, count);
 526                                         if (n == 0)
 527                                                 throw new IOException ("Unexpected end of stream");
 528                                         pos += n;
 529                                         count -= n;
 530                                 }
 531                                 return result;
 532                         }
 533                 }
 534
 535                 public static string [] ReadAllLines (string path)
 536                 {
 537                         using (StreamReader reader = File.OpenText (path)) {
 538                                 return ReadAllLines (reader);
 539                         }
 540                 }
 541
 542                 public static string [] ReadAllLines (string path, Encoding encoding)
 543                 {
 544                         using (StreamReader reader = new StreamReader (path, encoding)) {
 545                                 return ReadAllLines (reader);
 546                         }
 547                 }
 548
 549                 static string [] ReadAllLines (StreamReader reader)
 550                 {
 551                         List<string> list = new List<string> ();
 552                         while (!reader.EndOfStream)
 553                                 list.Add (reader.ReadLine ());
 554                         return list.ToArray ();
 555                 }
 556
 557                 public static string ReadAllText (string path)
 558                 {
 559                         using (StreamReader sr = new StreamReader (path)) {
 560                                 return sr.ReadToEnd ();
 561                         }
 562                 }
 563
 564                 public static string ReadAllText (string path, Encoding encoding)
 565                 {
 566                         using (StreamReader sr = new StreamReader (path, encoding)) {
 567                                 return sr.ReadToEnd ();
 568                         }
 569                 }
 570
 571                 public static void WriteAllBytes (string path, byte [] bytes)
 572                 {
 573                         using (Stream stream = File.Create (path)) {
 574                                 stream.Write (bytes, 0, bytes.Length);
 575                         }
 576                 }
 577
 578                 public static void WriteAllLines (string path, string [] contents)
 579                 {
 580                         using (StreamWriter writer = new StreamWriter (path)) {
 581                                 WriteAllLines (writer, contents);
 582                         }
 583                 }
 584
 585                 public static void WriteAllLines (string path, string [] contents, Encoding encoding)
 586                 {
 587                         using (StreamWriter writer = new StreamWriter (path, false, encoding)) {
 588                                 WriteAllLines (writer, contents);
 589                         }
 590                 }
 591
 592                 static void WriteAllLines (StreamWriter writer, string [] contents)
 593                 {
 594                         foreach (string line in contents)
 595                                 writer.WriteLine (line);
 596                 }
 597
 598                 public static void WriteAllText (string path, string contents)
 599                 {
 600                         WriteAllText (path, contents, EncodingHelper.UTF8Unmarked);
 601                 }
 602
 603                 public static void WriteAllText (string path, string contents, Encoding encoding)
 604                 {
 605                         using (StreamWriter sw = new StreamWriter (path, false, encoding)) {
 606                                 sw.Write (contents);
 607                         }
 608                 }
 609
 610                 static DateTime? defaultLocalFileTime;
 611                 static DateTime DefaultLocalFileTime {
 612                         get {
 613                                 if (defaultLocalFileTime == null)
 614                                         defaultLocalFileTime = new DateTime (1601, 1, 1).ToLocalTime ();
 615
 616                                 return defaultLocalFileTime.Value;
 617                         }
 618                 }
 619
 620
 621                 [MonoLimitation ("File encryption isn't supported (even on NTFS).")]
 622                 public static void Encrypt (string path)
 623                 {
 624                         // MS.NET support this only on NTFS file systems, i.e. it's a file-system (not a framework) feature.
 625                         // otherwise it throws a NotSupportedException (or a PlatformNotSupportedException on older OS).
 626                         // we throw the same (instead of a NotImplementedException) because most code should already be
 627                         // handling this exception to work properly.
 628                         throw new NotSupportedException (Locale.GetText ("File encryption isn't supported on any file system."));
 629                 }
 630
 631                 [MonoLimitation ("File encryption isn't supported (even on NTFS).")]
 632                 public static void Decrypt (string path)
 633                 {
 634                         // MS.NET support this only on NTFS file systems, i.e. it's a file-system (not a framework) feature.
 635                         // otherwise it throws a NotSupportedException (or a PlatformNotSupportedException on older OS).
 636                         // we throw the same (instead of a NotImplementedException) because most code should already be
 637                         // handling this exception to work properly.
 638                         throw new NotSupportedException (Locale.GetText ("File encryption isn't supported on any file system."));
 639                 }
 640
 641                 public static IEnumerable<string> ReadLines (string path)
 642                 {
 643                         return ReadLines (File.OpenText (path));
 644                 }
 645
 646                 public static IEnumerable<string> ReadLines (string path, Encoding encoding)
 647                 {
 648                         return ReadLines (new StreamReader (path, encoding));
 649                 }
 650
 651                 // refactored in order to avoid compiler-generated names for Moonlight tools
 652                 static IEnumerable<string> ReadLines (StreamReader reader)
 653                 {
 654                         using (reader) {
 655                                 string s;
 656                                 while ((s = reader.ReadLine ()) != null) {
 657                                         yield return s;
 658                                 }
 659                         }
 660                 }
 661
 662                 public static void AppendAllLines (string path, IEnumerable<string> contents)
 663                 {
 664                         Path.Validate (path);
 665
 666                         if (contents == null)
 667                                 return;
 668
 669                         using (TextWriter w = new StreamWriter (path, true)) {
 670                                 foreach (var line in contents)
 671                                         w.WriteLine (line);
 672                         }
 673                 }
 674
 675                 public static void AppendAllLines (string path, IEnumerable<string> contents, Encoding encoding)
 676                 {
 677                         Path.Validate (path);
 678
 679                         if (contents == null)
 680                                 return;
 681
 682                         using (TextWriter w = new StreamWriter (path, true, encoding)) {
 683                                 foreach (var line in contents)
 684                                         w.WriteLine (line);
 685                         }
 686                 }
 687
 688                 public static void WriteAllLines (string path, IEnumerable<string> contents)
 689                 {
 690                         Path.Validate (path);
 691
 692                         if (contents == null)
 693                                 return;
 694
 695                         using (TextWriter w = new StreamWriter (path, false)) {
 696                                 foreach (var line in contents)
 697                                         w.WriteLine (line);
 698                         }
 699                 }
 700
 701                 public static void WriteAllLines (string path, IEnumerable<string> contents, Encoding encoding)
 702                 {
 703                         Path.Validate (path);
 704
 705                         if (contents == null)
 706                                 return;
 707
 708                         using (TextWriter w = new StreamWriter (path, false, encoding)) {
 709                                 foreach (var line in contents)
 710                                         w.WriteLine (line);
 711                         }
 712                 }
 713
 714                 internal static int FillAttributeInfo (String path, ref MonoIOStat data, bool tryagain, bool returnErrorOnNotFound)
 715                 {
 716                         if (tryagain)
 717                                 throw new NotImplementedException ();
 718
 719                         MonoIOError error;
 720                         MonoIO.GetFileStat (path, out data, out error);
 721
 722                         if (!returnErrorOnNotFound && (error == MonoIOError.ERROR_FILE_NOT_FOUND || error == MonoIOError.ERROR_PATH_NOT_FOUND || error == MonoIOError.ERROR_NOT_READY)) {
 723                                 data = default (MonoIOStat);
 724                                 data.fileAttributes = (FileAttributes) (-1);
 725                                 return 0;
 726                         }
 727
 728                         return (int) error;
 729                 }
 730         }
 731 }