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

   1 // System.IO.MonoIO.cs: static interface to native filesystem.
   2 //
   3 // Author:
   4 //   Dan Lewis (dihlewis@yahoo.co.uk)
   5 //   Dick Porter (dick@ximian.com)
   6 //
   7 // (C) 2002
   8 // Copyright 2011 Xamarin Inc (http://www.xamarin.com).
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Runtime.CompilerServices;
  36 using System.Runtime.InteropServices;
  37 using System.Threading;
  38 using Microsoft.Win32.SafeHandles;
  39 #if MOBILE
  40 using System.IO.IsolatedStorage;
  41 #endif
  42
  43 namespace System.IO
  44 {
  45         unsafe static class MonoIO {
  46                 public const int FileAlreadyExistsHResult = unchecked ((int) 0x80070000) | (int)MonoIOError.ERROR_FILE_EXISTS;
  47
  48                 public const FileAttributes
  49                         InvalidFileAttributes = (FileAttributes)(-1);
  50
  51                 public static readonly IntPtr
  52                         InvalidHandle = (IntPtr)(-1L);
  53
  54                 static bool dump_handles = Environment.GetEnvironmentVariable ("MONO_DUMP_HANDLES_ON_ERROR_TOO_MANY_OPEN_FILES") != null;
  55
  56                 // error methods
  57                 public static Exception GetException (MonoIOError error)
  58                 {
  59                         /* This overload is currently only called from
  60                          * File.MoveFile(), Directory.Move() and
  61                          * Directory.GetCurrentDirectory() -
  62                          * everywhere else supplies a path to format
  63                          * with the error text.
  64                          */
  65                         switch(error) {
  66                         case MonoIOError.ERROR_ACCESS_DENIED:
  67                                 return new UnauthorizedAccessException ("Access to the path is denied.");
  68                         case MonoIOError.ERROR_FILE_EXISTS:
  69                                 string message = "Cannot create a file that already exist.";
  70                                 return new IOException (message, FileAlreadyExistsHResult);
  71                         default:
  72                                 /* Add more mappings here if other
  73                                  * errors trigger the named but empty
  74                                  * path bug (see bug 82141.) For
  75                                  * everything else, fall through to
  76                                  * the other overload
  77                                  */
  78                                 return GetException (String.Empty, error);
  79                         }
  80                 }
  81
  82                 public static Exception GetException (string path,
  83                                                       MonoIOError error)
  84                 {
  85                         string message;
  86
  87                         switch (error) {
  88                         // FIXME: add more exception mappings here
  89                         case MonoIOError.ERROR_FILE_NOT_FOUND:
  90                                 message = String.Format ("Could not find file \"{0}\"", path);
  91                                 return new FileNotFoundException (message, path);
  92
  93                         case MonoIOError.ERROR_TOO_MANY_OPEN_FILES:
  94                                 if (dump_handles)
  95                                         DumpHandles ();
  96                                 return new IOException ("Too many open files", unchecked((int)0x80070000) | (int)error);
  97
  98                         case MonoIOError.ERROR_PATH_NOT_FOUND:
  99                                 message = String.Format ("Could not find a part of the path \"{0}\"", path);
 100                                 return new DirectoryNotFoundException (message);
 101
 102                         case MonoIOError.ERROR_ACCESS_DENIED:
 103                                 message = String.Format ("Access to the path \"{0}\" is denied.", path);
 104                                 return new UnauthorizedAccessException (message);
 105
 106                         case MonoIOError.ERROR_INVALID_HANDLE:
 107                                 message = String.Format ("Invalid handle to path \"{0}\"", path);
 108                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 109                         case MonoIOError.ERROR_INVALID_DRIVE:
 110                                 message = String.Format ("Could not find the drive  '{0}'. The drive might not be ready or might not be mapped.", path);
 111 #if !MOBILE
 112                                 return new DriveNotFoundException (message);
 113 #else
 114                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 115 #endif
 116                         case MonoIOError.ERROR_FILE_EXISTS:
 117                                 message = String.Format ("Could not create file \"{0}\". File already exists.", path);
 118                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 119
 120                         case MonoIOError.ERROR_FILENAME_EXCED_RANGE:
 121                                 message = String.Format ("Path is too long. Path: {0}", path);
 122                                 return new PathTooLongException (message);
 123
 124                         case MonoIOError.ERROR_INVALID_PARAMETER:
 125                                 message = String.Format ("Invalid parameter");
 126                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 127
 128                         case MonoIOError.ERROR_WRITE_FAULT:
 129                                 message = String.Format ("Write fault on path {0}", path);
 130                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 131
 132                         case MonoIOError.ERROR_SHARING_VIOLATION:
 133                                 message = String.Format ("Sharing violation on path {0}", path);
 134                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 135
 136                         case MonoIOError.ERROR_LOCK_VIOLATION:
 137                                 message = String.Format ("Lock violation on path {0}", path);
 138                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 139
 140                         case MonoIOError.ERROR_HANDLE_DISK_FULL:
 141                                 message = String.Format ("Disk full. Path {0}", path);
 142                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 143
 144                         case MonoIOError.ERROR_DIR_NOT_EMPTY:
 145                                 message = String.Format ("Directory {0} is not empty", path);
 146                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 147
 148                         case MonoIOError.ERROR_ENCRYPTION_FAILED:
 149                                 return new IOException ("Encryption failed", unchecked((int)0x80070000) | (int)error);
 150
 151                         case MonoIOError.ERROR_CANNOT_MAKE:
 152                                 message = String.Format ("Path {0} is a directory", path);
 153                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 154
 155                         case MonoIOError.ERROR_NOT_SAME_DEVICE:
 156                                 message = "Source and destination are not on the same device";
 157                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 158
 159                         case MonoIOError.ERROR_DIRECTORY:
 160                                 message = "The directory name is invalid";
 161                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 162
 163                         default:
 164                                 message = String.Format ("Win32 IO returned {0}. Path: {1}", error, path);
 165                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 166                         }
 167                 }
 168
 169                 // directory methods
 170
 171                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 172                 public extern static bool CreateDirectory (string path, out MonoIOError error);
 173
 174                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 175                 public extern static bool RemoveDirectory (string path, out MonoIOError error);
 176
 177                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 178                 public extern static string [] GetFileSystemEntries (string path, string path_with_pattern, int attrs, int mask, out MonoIOError error);
 179
 180                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 181                 public extern static string GetCurrentDirectory (out MonoIOError error);
 182
 183                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 184                 public extern static bool SetCurrentDirectory (string path, out MonoIOError error);
 185
 186                 // file methods
 187
 188                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 189                 public extern static bool MoveFile (string path, string dest,
 190                                                     out MonoIOError error);
 191
 192                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 193                 public extern static bool CopyFile (string path, string dest,
 194                                                     bool overwrite,
 195                                                     out MonoIOError error);
 196
 197                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 198                 public extern static bool DeleteFile (string path,
 199                                                       out MonoIOError error);
 200
 201                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 202                 public extern static bool ReplaceFile (string sourceFileName,
 203                                                        string destinationFileName,
 204                                                        string destinationBackupFileName,
 205                                                        bool ignoreMetadataErrors,
 206                                                        out MonoIOError error);
 207
 208                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 209                 public extern static FileAttributes GetFileAttributes (string path, out MonoIOError error);
 210
 211                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 212                 public extern static bool SetFileAttributes (string path, FileAttributes attrs, out MonoIOError error);
 213
 214                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 215                 private extern static MonoFileType GetFileType (IntPtr handle, out MonoIOError error);
 216
 217                 public static MonoFileType GetFileType (SafeHandle safeHandle, out MonoIOError error)
 218                 {
 219                         bool release = false;
 220                         try {
 221                                 safeHandle.DangerousAddRef (ref release);
 222                                 return GetFileType (safeHandle.DangerousGetHandle (), out error);
 223                         } finally {
 224                                 if (release)
 225                                         safeHandle.DangerousRelease ();
 226                         }
 227                 }
 228
 229                 //
 230                 // Find file methods
 231                 //
 232                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 233                 public extern static string FindFirst (string path, string pattern, out FileAttributes result_attr, out MonoIOError error, out IntPtr handle);
 234
 235                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 236                 public extern static string FindNext (IntPtr handle, out FileAttributes result_attr, out MonoIOError error);
 237
 238                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 239                 public extern static int FindClose (IntPtr handle);
 240
 241                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 242                 public extern static IntPtr FindFirstFile (string path_with_pattern, out string fileName, out int fileAttr, out int error);
 243
 244                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 245                 public extern static bool FindNextFile (IntPtr hnd, out string fileName, out int fileAttr, out int error);
 246
 247                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 248                 public extern static bool FindCloseFile (IntPtr hnd);
 249
 250                 public static bool Exists (string path, out MonoIOError error)
 251                 {
 252                         FileAttributes attrs = GetFileAttributes (path,
 253                                                                   out error);
 254                         if (attrs == InvalidFileAttributes)
 255                                 return false;
 256
 257                         return true;
 258                 }
 259
 260                 public static bool ExistsFile (string path,
 261                                                out MonoIOError error)
 262                 {
 263                         FileAttributes attrs = GetFileAttributes (path,
 264                                                                   out error);
 265                         if (attrs == InvalidFileAttributes)
 266                                 return false;
 267
 268                         if ((attrs & FileAttributes.Directory) != 0)
 269                                 return false;
 270
 271                         return true;
 272                 }
 273
 274                 public static bool ExistsDirectory (string path,
 275                                                     out MonoIOError error)
 276                 {
 277                         FileAttributes attrs = GetFileAttributes (path,
 278                                                                   out error);
 279
 280                         // Actually, we are looking for a directory, not a file
 281                         if (error == MonoIOError.ERROR_FILE_NOT_FOUND)
 282                                 error = MonoIOError.ERROR_PATH_NOT_FOUND;
 283
 284                         if (attrs == InvalidFileAttributes)
 285                                 return false;
 286
 287                         if ((attrs & FileAttributes.Directory) == 0)
 288                                 return false;
 289
 290                         return true;
 291                 }
 292
 293                 public static bool ExistsSymlink (string path,
 294                                                   out MonoIOError error)
 295                 {
 296                         FileAttributes attrs = GetFileAttributes (path,
 297                                                                   out error);
 298                         if (attrs == InvalidFileAttributes)
 299                                 return false;
 300
 301                         if ((attrs & FileAttributes.ReparsePoint) == 0)
 302                                 return false;
 303
 304                         return true;
 305                 }
 306
 307                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 308                 public extern static bool GetFileStat (string path,
 309                                                        out MonoIOStat stat,
 310                                                        out MonoIOError error);
 311
 312                 // handle methods
 313
 314                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 315                 public extern static IntPtr Open (string filename,
 316                                                   FileMode mode,
 317                                                   FileAccess access,
 318                                                   FileShare share,
 319                                                   FileOptions options,
 320                                                   out MonoIOError error);
 321
 322                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 323                 public extern static bool Close (IntPtr handle,
 324                                                  out MonoIOError error);
 325
 326                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 327                 private extern static int Read (IntPtr handle, byte [] dest,
 328                                                int dest_offset, int count,
 329                                                out MonoIOError error);
 330
 331                 public static int Read (SafeHandle safeHandle, byte [] dest,
 332                                                int dest_offset, int count,
 333                                                out MonoIOError error)
 334                 {
 335                         bool release = false;
 336                         try {
 337                                 safeHandle.DangerousAddRef (ref release);
 338                                 return Read (safeHandle.DangerousGetHandle (), dest, dest_offset, count, out error);
 339                         } finally {
 340                                 if (release)
 341                                         safeHandle.DangerousRelease ();
 342                         }
 343                 }
 344
 345                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 346                 private extern static int Write (IntPtr handle, [In] byte [] src,
 347                                                 int src_offset, int count,
 348                                                 out MonoIOError error);
 349
 350                 public static int Write (SafeHandle safeHandle, byte [] src,
 351                                                 int src_offset, int count,
 352                                                 out MonoIOError error)
 353                 {
 354                         bool release = false;
 355                         try {
 356                                 safeHandle.DangerousAddRef (ref release);
 357                                 return Write (safeHandle.DangerousGetHandle (), src, src_offset, count, out error);
 358                         } finally {
 359                                 if (release)
 360                                         safeHandle.DangerousRelease ();
 361                         }
 362                 }
 363
 364                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 365                 private extern static long Seek (IntPtr handle, long offset,
 366                                                 SeekOrigin origin,
 367                                                 out MonoIOError error);
 368
 369                 public static long Seek (SafeHandle safeHandle, long offset,
 370                                                 SeekOrigin origin,
 371                                                 out MonoIOError error)
 372                 {
 373                         bool release = false;
 374                         try {
 375                                 safeHandle.DangerousAddRef (ref release);
 376                                 return Seek (safeHandle.DangerousGetHandle (), offset, origin, out error);
 377                         } finally {
 378                                 if (release)
 379                                         safeHandle.DangerousRelease ();
 380                         }
 381                 }
 382
 383                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 384                 private extern static bool Flush (IntPtr handle,
 385                                                  out MonoIOError error);
 386
 387                 public static bool Flush (SafeHandle safeHandle,
 388                                                  out MonoIOError error)
 389                 {
 390                         bool release = false;
 391                         try {
 392                                 safeHandle.DangerousAddRef (ref release);
 393                                 return Flush (safeHandle.DangerousGetHandle (), out error);
 394                         } finally {
 395                                 if (release)
 396                                         safeHandle.DangerousRelease ();
 397                         }
 398                 }
 399
 400                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 401                 private extern static long GetLength (IntPtr handle,
 402                                                      out MonoIOError error);
 403
 404                 public static long GetLength (SafeHandle safeHandle,
 405                                                      out MonoIOError error)
 406                 {
 407                         bool release = false;
 408                         try {
 409                                 safeHandle.DangerousAddRef (ref release);
 410                                 return GetLength (safeHandle.DangerousGetHandle (), out error);
 411                         } finally {
 412                                 if (release)
 413                                         safeHandle.DangerousRelease ();
 414                         }
 415                 }
 416
 417                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 418                 private extern static bool SetLength (IntPtr handle,
 419                                                      long length,
 420                                                      out MonoIOError error);
 421
 422                 public static bool SetLength (SafeHandle safeHandle,
 423                                                      long length,
 424                                                      out MonoIOError error)
 425                 {
 426                         bool release = false;
 427                         try {
 428                                 safeHandle.DangerousAddRef (ref release);
 429                                 return SetLength (safeHandle.DangerousGetHandle (), length, out error);
 430                         } finally {
 431                                 if (release)
 432                                         safeHandle.DangerousRelease ();
 433                         }
 434                 }
 435
 436                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 437                 private extern static bool SetFileTime (IntPtr handle,
 438                                                        long creation_time,
 439                                                        long last_access_time,
 440                                                        long last_write_time,
 441                                                        out MonoIOError error);
 442
 443                 public static bool SetFileTime (SafeHandle safeHandle,
 444                                                        long creation_time,
 445                                                        long last_access_time,
 446                                                        long last_write_time,
 447                                                        out MonoIOError error)
 448                 {
 449                         bool release = false;
 450                         try {
 451                                 safeHandle.DangerousAddRef (ref release);
 452                                 return SetFileTime (safeHandle.DangerousGetHandle (), creation_time, last_access_time, last_write_time, out error);
 453                         } finally {
 454                                 if (release)
 455                                         safeHandle.DangerousRelease ();
 456                         }
 457                 }
 458
 459                 public static bool SetFileTime (string path,
 460                                                 long creation_time,
 461                                                 long last_access_time,
 462                                                 long last_write_time,
 463                                                 out MonoIOError error)
 464                 {
 465                         return SetFileTime (path,
 466                                 0,
 467                                 creation_time,
 468                                 last_access_time,
 469                                 last_write_time,
 470                                 DateTime.MinValue,
 471                                 out error);
 472                 }
 473
 474                 public static bool SetCreationTime (string path,
 475                                                 DateTime dateTime,
 476                                                 out MonoIOError error)
 477                 {
 478                         return SetFileTime (path, 1, -1, -1, -1, dateTime, out error);
 479                 }
 480
 481                 public static bool SetLastAccessTime (string path,
 482                                                 DateTime dateTime,
 483                                                 out MonoIOError error)
 484                 {
 485                         return SetFileTime (path, 2, -1, -1, -1, dateTime, out error);
 486                 }
 487
 488                 public static bool SetLastWriteTime (string path,
 489                                                 DateTime dateTime,
 490                                                 out MonoIOError error)
 491                 {
 492                         return SetFileTime (path, 3, -1, -1, -1, dateTime, out error);
 493                 }
 494
 495                 public static bool SetFileTime (string path,
 496                                                 int type,
 497                                                 long creation_time,
 498                                                 long last_access_time,
 499                                                 long last_write_time,
 500                                                 DateTime dateTime,
 501                                                 out MonoIOError error)
 502                 {
 503                         IntPtr handle;
 504                         bool result;
 505
 506                         handle = Open (path, FileMode.Open,
 507                                        FileAccess.ReadWrite,
 508                                        FileShare.ReadWrite, FileOptions.None, out error);
 509                         if (handle == MonoIO.InvalidHandle)
 510                                 return false;
 511
 512                         switch (type) {
 513                         case 1:
 514                                 creation_time = dateTime.ToFileTime ();
 515                                 break;
 516                         case 2:
 517                                 last_access_time = dateTime.ToFileTime ();
 518                                 break;
 519                         case 3:
 520                                 last_write_time = dateTime.ToFileTime ();
 521                                 break;
 522                         }
 523
 524                         result = SetFileTime (new SafeFileHandle(handle, false), creation_time,
 525                                               last_access_time,
 526                                               last_write_time, out error);
 527
 528                         MonoIOError ignore_error;
 529                         Close (handle, out ignore_error);
 530
 531                         return result;
 532                 }
 533
 534                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 535                 private extern static void Lock (IntPtr handle,
 536                                                 long position, long length,
 537                                                 out MonoIOError error);
 538
 539                 public static void Lock (SafeHandle safeHandle,
 540                                                 long position, long length,
 541                                                 out MonoIOError error)
 542                 {
 543                         bool release = false;
 544                         try {
 545                                 safeHandle.DangerousAddRef (ref release);
 546                                 Lock (safeHandle.DangerousGetHandle (), position, length, out error);
 547                         } finally {
 548                                 if (release)
 549                                         safeHandle.DangerousRelease ();
 550                         }
 551                 }
 552
 553                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 554                 private extern static void Unlock (IntPtr handle,
 555                                                   long position, long length,
 556                                                   out MonoIOError error);
 557
 558                 public static void Unlock (SafeHandle safeHandle,
 559                                                   long position, long length,
 560                                                   out MonoIOError error)
 561                 {
 562                         bool release = false;
 563                         try {
 564                                 safeHandle.DangerousAddRef (ref release);
 565                                 Unlock (safeHandle.DangerousGetHandle (), position, length, out error);
 566                         } finally {
 567                                 if (release)
 568                                         safeHandle.DangerousRelease ();
 569                         }
 570                 }
 571
 572                 // console handles
 573
 574                 public extern static IntPtr ConsoleOutput {
 575                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 576                         get;
 577                 }
 578
 579                 public extern static IntPtr ConsoleInput {
 580                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 581                         get;
 582                 }
 583
 584                 public extern static IntPtr ConsoleError {
 585                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 586                         get;
 587                 }
 588
 589                 // pipe handles
 590
 591                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 592                 public extern static bool CreatePipe (out IntPtr read_handle, out IntPtr write_handle, out MonoIOError error);
 593
 594                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 595                 public extern static bool DuplicateHandle (IntPtr source_process_handle, IntPtr source_handle,
 596                         IntPtr target_process_handle, out IntPtr target_handle, int access, int inherit, int options, out MonoIOError error);
 597
 598                 // path characters
 599
 600                 public extern static char VolumeSeparatorChar {
 601                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 602                         get;
 603                 }
 604
 605                 public extern static char DirectorySeparatorChar {
 606                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 607                         get;
 608                 }
 609
 610                 public extern static char AltDirectorySeparatorChar {
 611                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 612                         get;
 613                 }
 614
 615                 public extern static char PathSeparator {
 616                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 617                         get;
 618                 }
 619
 620                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 621                 extern static void DumpHandles ();
 622         }
 623 }
 624