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

   1 //
   2 // System.IO.MonoIO.cs: static interface to native filesystem.
   3 //
   4 // Author:
   5 //   Dan Lewis (dihlewis@yahoo.co.uk)
   6 //   Dick Porter (dick@ximian.com)
   7 //
   8 // (C) 2002
   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
  39 namespace System.IO
  40 {
  41         unsafe internal sealed class MonoIO {
  42                 public static readonly FileAttributes
  43                         InvalidFileAttributes = (FileAttributes)(-1);
  44
  45                 public static readonly IntPtr
  46                         InvalidHandle = (IntPtr)(-1L);
  47
  48                 public static readonly bool SupportsAsync = GetSupportsAsync ();
  49
  50                 // error methods
  51
  52                 public static Exception GetException (MonoIOError error)
  53                 {
  54                         return GetException (String.Empty, error);
  55                 }
  56
  57                 public static Exception GetException (string path,
  58                                                       MonoIOError error)
  59                 {
  60                         string message;
  61
  62                         switch (error) {
  63                         // FIXME: add more exception mappings here
  64                         case MonoIOError.ERROR_FILE_NOT_FOUND:
  65                                 message = String.Format ("Could not find file \"{0}\"", path);
  66                                 return new FileNotFoundException (message,
  67                                                                   path);
  68
  69                         case MonoIOError.ERROR_TOO_MANY_OPEN_FILES:
  70                                 return new IOException ("Too many open files");
  71
  72                         case MonoIOError.ERROR_PATH_NOT_FOUND:
  73                                 message = String.Format ("Could not find a part of the path \"{0}\"", path);
  74                                 return new DirectoryNotFoundException (message);
  75
  76                         case MonoIOError.ERROR_ACCESS_DENIED:
  77                                 message = String.Format ("Access to the path \"{0}\" is denied.", path);
  78                                 return new UnauthorizedAccessException (message);
  79
  80                         case MonoIOError.ERROR_INVALID_HANDLE:
  81                                 message = String.Format ("Invalid handle to path \"{0}\"", path);
  82                                 return new IOException (message);
  83
  84                         case MonoIOError.ERROR_FILE_EXISTS:
  85                                 message = String.Format ("Could not create file \"{0}\". File already exists.", path);
  86                                 return new IOException (message);
  87
  88                         case MonoIOError.ERROR_FILENAME_EXCED_RANGE:
  89                                 message = String.Format ("Path is too long. Path: {0}", path);
  90                                 return new PathTooLongException (message);
  91
  92                         case MonoIOError.ERROR_INVALID_PARAMETER:
  93                                 message = String.Format ("Invalid parameter");
  94                                 return new IOException (message);
  95
  96                         case MonoIOError.ERROR_SHARING_VIOLATION:
  97                                 message = String.Format ("Sharing violation on path {0}", path);
  98                                 return new IOException (message);
  99
 100                         case MonoIOError.ERROR_LOCK_VIOLATION:
 101                                 message = String.Format ("Lock violation on path {0}", path);
 102                                 return new IOException (message);
 103
 104                         default:
 105                                 message = String.Format ("Win32 IO returned {0}. Path: {1}", error, path);
 106                                 return new IOException (message);
 107                         }
 108                 }
 109
 110                 // directory methods
 111
 112                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 113                 public extern static bool CreateDirectory (string path, out MonoIOError error);
 114
 115                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 116                 public extern static bool RemoveDirectory (string path, out MonoIOError error);
 117
 118                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 119                 public extern static IntPtr FindFirstFile (string path, out MonoIOStat stat, out MonoIOError error);
 120
 121                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 122                 public extern static bool FindNextFile (IntPtr find, out MonoIOStat stat, out MonoIOError error);
 123
 124                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 125                 public extern static bool FindClose (IntPtr find,
 126                                                      out MonoIOError error);
 127
 128                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 129                 public extern static string GetCurrentDirectory (out MonoIOError error);
 130
 131                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 132                 public extern static bool SetCurrentDirectory (string path, out MonoIOError error);
 133
 134                 // file methods
 135
 136                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 137                 public extern static bool MoveFile (string path, string dest,
 138                                                     out MonoIOError error);
 139
 140                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 141                 public extern static bool CopyFile (string path, string dest,
 142                                                     bool overwrite,
 143                                                     out MonoIOError error);
 144
 145                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 146                 public extern static bool DeleteFile (string path,
 147                                                       out MonoIOError error);
 148
 149                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 150                 public extern static FileAttributes GetFileAttributes (string path, out MonoIOError error);
 151
 152                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 153                 public extern static bool SetFileAttributes (string path, FileAttributes attrs, out MonoIOError error);
 154
 155                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 156                 public extern static MonoFileType GetFileType (IntPtr handle, out MonoIOError error);
 157
 158                 // aio_* methods
 159                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 160                 extern static bool GetSupportsAsync ();
 161
 162                 public static bool Exists (string path, out MonoIOError error)
 163                 {
 164                         FileAttributes attrs = GetFileAttributes (path,
 165                                                                   out error);
 166                         if (attrs == InvalidFileAttributes)
 167                                 return false;
 168
 169                         return true;
 170                 }
 171
 172                 public static bool ExistsFile (string path,
 173                                                out MonoIOError error)
 174                 {
 175                         FileAttributes attrs = GetFileAttributes (path,
 176                                                                   out error);
 177                         if (attrs == InvalidFileAttributes)
 178                                 return false;
 179
 180                         if ((attrs & FileAttributes.Directory) != 0)
 181                                 return false;
 182
 183                         return true;
 184                 }
 185
 186                 public static bool ExistsDirectory (string path,
 187                                                     out MonoIOError error)
 188                 {
 189                         FileAttributes attrs = GetFileAttributes (path,
 190                                                                   out error);
 191
 192                         // Actually, we are looking for a directory, not a file
 193                         if (error == MonoIOError.ERROR_FILE_NOT_FOUND)
 194                                 error = MonoIOError.ERROR_PATH_NOT_FOUND;
 195
 196                         if (attrs == InvalidFileAttributes)
 197                                 return false;
 198
 199                         if ((attrs & FileAttributes.Directory) == 0)
 200                                 return false;
 201
 202                         return true;
 203                 }
 204
 205                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 206                 public extern static bool GetFileStat (string path,
 207                                                        out MonoIOStat stat,
 208                                                        out MonoIOError error);
 209
 210                 // handle methods
 211
 212                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 213                 public extern static IntPtr Open (string filename,
 214                                                   FileMode mode,
 215                                                   FileAccess access,
 216                                                   FileShare share,
 217                                                   bool async,
 218                                                   out MonoIOError error);
 219
 220                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 221                 public extern static bool Close (IntPtr handle,
 222                                                  out MonoIOError error);
 223
 224                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 225                 public extern static int Read (IntPtr handle, byte [] dest,
 226                                                int dest_offset, int count,
 227                                                out MonoIOError error);
 228
 229                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 230                 public extern static int Write (IntPtr handle, [In] byte [] src,
 231                                                 int src_offset, int count,
 232                                                 out MonoIOError error);
 233
 234                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 235                 public extern static long Seek (IntPtr handle, long offset,
 236                                                 SeekOrigin origin,
 237                                                 out MonoIOError error);
 238
 239                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 240                 public extern static bool Flush (IntPtr handle,
 241                                                  out MonoIOError error);
 242
 243                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 244                 public extern static long GetLength (IntPtr handle,
 245                                                      out MonoIOError error);
 246
 247                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 248                 public extern static bool SetLength (IntPtr handle,
 249                                                      long length,
 250                                                      out MonoIOError error);
 251
 252                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 253                 public extern static bool SetFileTime (IntPtr handle,
 254                                                        long creation_time,
 255                                                        long last_access_time,
 256                                                        long last_write_time,
 257                                                        out MonoIOError error);
 258
 259                 public static bool SetFileTime (string path,
 260                                                 long creation_time,
 261                                                 long last_access_time,
 262                                                 long last_write_time,
 263                                                 out MonoIOError error)
 264                 {
 265                         return SetFileTime (path,
 266                                 0,
 267                                 creation_time,
 268                                 last_access_time,
 269                                 last_write_time,
 270                                 DateTime.MinValue,
 271                                 out error);
 272                 }
 273
 274                 public static bool SetCreationTime (string path,
 275                                                 DateTime dateTime,
 276                                                 out MonoIOError error)
 277                 {
 278                         return SetFileTime (path, 1, -1, -1, -1, dateTime, out error);
 279                 }
 280
 281                 public static bool SetLastAccessTime (string path,
 282                                                 DateTime dateTime,
 283                                                 out MonoIOError error)
 284                 {
 285                         return SetFileTime (path, 2, -1, -1, -1, dateTime, out error);
 286                 }
 287
 288                 public static bool SetLastWriteTime (string path,
 289                                                 DateTime dateTime,
 290                                                 out MonoIOError error)
 291                 {
 292                         return SetFileTime (path, 3, -1, -1, -1, dateTime, out error);
 293                 }
 294
 295                 public static bool SetFileTime (string path,
 296                                                 int type,
 297                                                 long creation_time,
 298                                                 long last_access_time,
 299                                                 long last_write_time,
 300                                                 DateTime dateTime,
 301                                                 out MonoIOError error)
 302                 {
 303                         IntPtr handle;
 304                         bool result;
 305
 306                         handle = Open (path, FileMode.Open,
 307                                        FileAccess.ReadWrite,
 308                                        FileShare.ReadWrite, false, out error);
 309                         if (handle == MonoIO.InvalidHandle)
 310                                 return false;
 311
 312                         switch (type) {
 313                         case 1:
 314                                 creation_time = dateTime.ToFileTime ();
 315                                 break;
 316                         case 2:
 317                                 last_access_time = dateTime.ToFileTime ();
 318                                 break;
 319                         case 3:
 320                                 last_write_time = dateTime.ToFileTime ();
 321                                 break;
 322                         }
 323
 324                         result = SetFileTime (handle, creation_time,
 325                                               last_access_time,
 326                                               last_write_time, out error);
 327
 328                         MonoIOError ignore_error;
 329                         Close (handle, out ignore_error);
 330
 331                         return result;
 332                 }
 333
 334                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 335                 public extern static void Lock (IntPtr handle,
 336                                                 long position, long length,
 337                                                 out MonoIOError error);
 338
 339                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 340                 public extern static void Unlock (IntPtr handle,
 341                                                   long position, long length,
 342                                                   out MonoIOError error);
 343
 344                 // console handles
 345
 346                 public extern static IntPtr ConsoleOutput {
 347                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 348                         get;
 349                 }
 350
 351                 public extern static IntPtr ConsoleInput {
 352                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 353                         get;
 354                 }
 355
 356                 public extern static IntPtr ConsoleError {
 357                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 358                         get;
 359                 }
 360
 361                 // pipe handles
 362
 363                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 364                 public extern static bool CreatePipe (out IntPtr read_handle, out IntPtr write_handle);
 365
 366                 // path characters
 367
 368                 public extern static char VolumeSeparatorChar {
 369                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 370                         get;
 371                 }
 372
 373                 public extern static char DirectorySeparatorChar {
 374                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 375                         get;
 376                 }
 377
 378                 public extern static char AltDirectorySeparatorChar {
 379                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 380                         get;
 381                 }
 382
 383                 public extern static char PathSeparator {
 384                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 385                         get;
 386                 }
 387
 388                 public extern static char [] InvalidPathChars {
 389                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 390                         get;
 391                 }
 392
 393                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 394                 public extern static int GetTempPath(out string path);
 395
 396                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 397                 public extern static void BeginWrite (IntPtr handle,FileStreamAsyncResult ares);
 398
 399                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 400                 public extern static void BeginRead (IntPtr handle, FileStreamAsyncResult ares);
 401
 402         }
 403 }
 404