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 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Runtime.CompilerServices;
  35 using System.Runtime.InteropServices;
  36 using System.Threading;
  37 #if NET_2_1
  38 using System.IO.IsolatedStorage;
  39 #endif
  40
  41 namespace System.IO
  42 {
  43         unsafe internal sealed class MonoIO {
  44                 public static readonly FileAttributes
  45                         InvalidFileAttributes = (FileAttributes)(-1);
  46
  47                 public static readonly IntPtr
  48                         InvalidHandle = (IntPtr)(-1L);
  49
  50                 // error methods
  51                 public static Exception GetException (MonoIOError error)
  52                 {
  53                         /* This overload is currently only called from
  54                          * File.MoveFile(), Directory.Move() and
  55                          * Directory.GetCurrentDirectory() -
  56                          * everywhere else supplies a path to format
  57                          * with the error text.
  58                          */
  59                         switch(error) {
  60                         case MonoIOError.ERROR_ACCESS_DENIED:
  61                                 return new UnauthorizedAccessException ("Access to the path is denied.");
  62                         case MonoIOError.ERROR_FILE_EXISTS:
  63                                 string message = "Cannot create a file that already exist.";
  64                                 return new IOException (message, unchecked ((int) 0x80070000) | (int) error);
  65                         default:
  66                                 /* Add more mappings here if other
  67                                  * errors trigger the named but empty
  68                                  * path bug (see bug 82141.) For
  69                                  * everything else, fall through to
  70                                  * the other overload
  71                                  */
  72                                 return GetException (String.Empty, error);
  73                         }
  74                 }
  75
  76                 public static Exception GetException (string path,
  77                                                       MonoIOError error)
  78                 {
  79                         string message;
  80
  81                         switch (error) {
  82                         // FIXME: add more exception mappings here
  83                         case MonoIOError.ERROR_FILE_NOT_FOUND:
  84                                 message = String.Format ("Could not find file \"{0}\"", path);
  85 #if NET_2_1
  86                                 return new IsolatedStorageException (message);
  87 #else
  88                                 return new FileNotFoundException (message, path);
  89 #endif
  90
  91                         case MonoIOError.ERROR_TOO_MANY_OPEN_FILES:
  92                                 return new IOException ("Too many open files", unchecked((int)0x80070000) | (int)error);
  93
  94                         case MonoIOError.ERROR_PATH_NOT_FOUND:
  95                                 message = String.Format ("Could not find a part of the path \"{0}\"", path);
  96 #if NET_2_1
  97                                 return new IsolatedStorageException (message);
  98 #else
  99                                 return new DirectoryNotFoundException (message);
 100 #endif
 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 !NET_2_1
 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                         default:
 160                                 message = String.Format ("Win32 IO returned {0}. Path: {1}", error, path);
 161                                 return new IOException (message, unchecked((int)0x80070000) | (int)error);
 162                         }
 163                 }
 164
 165                 // directory methods
 166
 167                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 168                 public extern static bool CreateDirectory (string path, out MonoIOError error);
 169
 170                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 171                 public extern static bool RemoveDirectory (string path, out MonoIOError error);
 172
 173                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 174                 public extern static string [] GetFileSystemEntries (string path, string path_with_pattern, int attrs, int mask, out MonoIOError error);
 175
 176                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 177                 public extern static string GetCurrentDirectory (out MonoIOError error);
 178
 179                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 180                 public extern static bool SetCurrentDirectory (string path, out MonoIOError error);
 181
 182                 // file methods
 183
 184                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 185                 public extern static bool MoveFile (string path, string dest,
 186                                                     out MonoIOError error);
 187
 188                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 189                 public extern static bool CopyFile (string path, string dest,
 190                                                     bool overwrite,
 191                                                     out MonoIOError error);
 192
 193                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 194                 public extern static bool DeleteFile (string path,
 195                                                       out MonoIOError error);
 196
 197                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 198                 public extern static bool ReplaceFile (string sourceFileName,
 199                                                        string destinationFileName,
 200                                                        string destinationBackupFileName,
 201                                                        bool ignoreMetadataErrors,
 202                                                        out MonoIOError error);
 203
 204                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 205                 public extern static FileAttributes GetFileAttributes (string path, out MonoIOError error);
 206
 207                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 208                 public extern static bool SetFileAttributes (string path, FileAttributes attrs, out MonoIOError error);
 209
 210                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 211                 public extern static MonoFileType GetFileType (IntPtr handle, out MonoIOError error);
 212
 213                 //
 214                 // Find file methods
 215                 //
 216                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 217                 public extern static string FindFirst (string path, string pattern, out FileAttributes result_attr, out MonoIOError error, out IntPtr handle);
 218
 219                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 220                 public extern static string FindNext (IntPtr handle, out FileAttributes result_attr, out MonoIOError error);
 221
 222                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 223                 public extern static int FindClose (IntPtr handle);
 224
 225                 public static bool Exists (string path, out MonoIOError error)
 226                 {
 227                         FileAttributes attrs = GetFileAttributes (path,
 228                                                                   out error);
 229                         if (attrs == InvalidFileAttributes)
 230                                 return false;
 231
 232                         return true;
 233                 }
 234
 235                 public static bool ExistsFile (string path,
 236                                                out MonoIOError error)
 237                 {
 238                         FileAttributes attrs = GetFileAttributes (path,
 239                                                                   out error);
 240                         if (attrs == InvalidFileAttributes)
 241                                 return false;
 242
 243                         if ((attrs & FileAttributes.Directory) != 0)
 244                                 return false;
 245
 246                         return true;
 247                 }
 248
 249                 public static bool ExistsDirectory (string path,
 250                                                     out MonoIOError error)
 251                 {
 252                         FileAttributes attrs = GetFileAttributes (path,
 253                                                                   out error);
 254
 255                         // Actually, we are looking for a directory, not a file
 256                         if (error == MonoIOError.ERROR_FILE_NOT_FOUND)
 257                                 error = MonoIOError.ERROR_PATH_NOT_FOUND;
 258
 259                         if (attrs == InvalidFileAttributes)
 260                                 return false;
 261
 262                         if ((attrs & FileAttributes.Directory) == 0)
 263                                 return false;
 264
 265                         return true;
 266                 }
 267
 268                 public static bool ExistsSymlink (string path,
 269                                                   out MonoIOError error)
 270                 {
 271                         FileAttributes attrs = GetFileAttributes (path,
 272                                                                   out error);
 273                         if (attrs == InvalidFileAttributes)
 274                                 return false;
 275
 276                         if ((attrs & FileAttributes.ReparsePoint) == 0)
 277                                 return false;
 278
 279                         return true;
 280                 }
 281
 282                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 283                 public extern static bool GetFileStat (string path,
 284                                                        out MonoIOStat stat,
 285                                                        out MonoIOError error);
 286
 287                 // handle methods
 288
 289                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 290                 public extern static IntPtr Open (string filename,
 291                                                   FileMode mode,
 292                                                   FileAccess access,
 293                                                   FileShare share,
 294                                                   FileOptions options,
 295                                                   out MonoIOError error);
 296
 297                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 298                 public extern static bool Close (IntPtr handle,
 299                                                  out MonoIOError error);
 300
 301                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 302                 public extern static int Read (IntPtr handle, byte [] dest,
 303                                                int dest_offset, int count,
 304                                                out MonoIOError error);
 305
 306                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 307                 public extern static int Write (IntPtr handle, [In] byte [] src,
 308                                                 int src_offset, int count,
 309                                                 out MonoIOError error);
 310
 311                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 312                 public extern static long Seek (IntPtr handle, long offset,
 313                                                 SeekOrigin origin,
 314                                                 out MonoIOError error);
 315
 316                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 317                 public extern static bool Flush (IntPtr handle,
 318                                                  out MonoIOError error);
 319
 320                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 321                 public extern static long GetLength (IntPtr handle,
 322                                                      out MonoIOError error);
 323
 324                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 325                 public extern static bool SetLength (IntPtr handle,
 326                                                      long length,
 327                                                      out MonoIOError error);
 328
 329                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 330                 public extern static bool SetFileTime (IntPtr handle,
 331                                                        long creation_time,
 332                                                        long last_access_time,
 333                                                        long last_write_time,
 334                                                        out MonoIOError error);
 335
 336                 public static bool SetFileTime (string path,
 337                                                 long creation_time,
 338                                                 long last_access_time,
 339                                                 long last_write_time,
 340                                                 out MonoIOError error)
 341                 {
 342                         return SetFileTime (path,
 343                                 0,
 344                                 creation_time,
 345                                 last_access_time,
 346                                 last_write_time,
 347                                 DateTime.MinValue,
 348                                 out error);
 349                 }
 350
 351                 public static bool SetCreationTime (string path,
 352                                                 DateTime dateTime,
 353                                                 out MonoIOError error)
 354                 {
 355                         return SetFileTime (path, 1, -1, -1, -1, dateTime, out error);
 356                 }
 357
 358                 public static bool SetLastAccessTime (string path,
 359                                                 DateTime dateTime,
 360                                                 out MonoIOError error)
 361                 {
 362                         return SetFileTime (path, 2, -1, -1, -1, dateTime, out error);
 363                 }
 364
 365                 public static bool SetLastWriteTime (string path,
 366                                                 DateTime dateTime,
 367                                                 out MonoIOError error)
 368                 {
 369                         return SetFileTime (path, 3, -1, -1, -1, dateTime, out error);
 370                 }
 371
 372                 public static bool SetFileTime (string path,
 373                                                 int type,
 374                                                 long creation_time,
 375                                                 long last_access_time,
 376                                                 long last_write_time,
 377                                                 DateTime dateTime,
 378                                                 out MonoIOError error)
 379                 {
 380                         IntPtr handle;
 381                         bool result;
 382
 383                         handle = Open (path, FileMode.Open,
 384                                        FileAccess.ReadWrite,
 385                                        FileShare.ReadWrite, FileOptions.None, out error);
 386                         if (handle == MonoIO.InvalidHandle)
 387                                 return false;
 388
 389                         switch (type) {
 390                         case 1:
 391                                 creation_time = dateTime.ToFileTime ();
 392                                 break;
 393                         case 2:
 394                                 last_access_time = dateTime.ToFileTime ();
 395                                 break;
 396                         case 3:
 397                                 last_write_time = dateTime.ToFileTime ();
 398                                 break;
 399                         }
 400
 401                         result = SetFileTime (handle, creation_time,
 402                                               last_access_time,
 403                                               last_write_time, out error);
 404
 405                         MonoIOError ignore_error;
 406                         Close (handle, out ignore_error);
 407
 408                         return result;
 409                 }
 410
 411                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 412                 public extern static void Lock (IntPtr handle,
 413                                                 long position, long length,
 414                                                 out MonoIOError error);
 415
 416                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 417                 public extern static void Unlock (IntPtr handle,
 418                                                   long position, long length,
 419                                                   out MonoIOError error);
 420
 421                 // console handles
 422
 423                 public extern static IntPtr ConsoleOutput {
 424                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 425                         get;
 426                 }
 427
 428                 public extern static IntPtr ConsoleInput {
 429                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 430                         get;
 431                 }
 432
 433                 public extern static IntPtr ConsoleError {
 434                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 435                         get;
 436                 }
 437
 438                 // pipe handles
 439
 440                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 441                 public extern static bool CreatePipe (out IntPtr read_handle, out IntPtr write_handle);
 442
 443                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 444                 public extern static bool DuplicateHandle (IntPtr source_process_handle, IntPtr source_handle,
 445                         IntPtr target_process_handle, out IntPtr target_handle, int access, int inherit, int options);
 446
 447                 // path characters
 448
 449                 public extern static char VolumeSeparatorChar {
 450                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 451                         get;
 452                 }
 453
 454                 public extern static char DirectorySeparatorChar {
 455                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 456                         get;
 457                 }
 458
 459                 public extern static char AltDirectorySeparatorChar {
 460                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 461                         get;
 462                 }
 463
 464                 public extern static char PathSeparator {
 465                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 466                         get;
 467                 }
 468
 469                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 470                 public extern static int GetTempPath(out string path);
 471         }
 472 }
 473