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

   1 //
   2 // System.IO.DirectoryInfo.cs
   3 //
   4 // Authors:
   5 //   Miguel de Icaza, miguel@ximian.com
   6 //   Jim Richardson, develop@wtfo-guru.com
   7 //   Dan Lewis, dihlewis@yahoo.co.uk
   8 //   Sebastien Pouliot  <sebastien@ximian.com>
   9 //
  10 // Copyright (C) 2002 Ximian, Inc.
  11 // Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
  12 // Copyright (C) 2004-2005 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.Collections;
  35 using System.Collections.Generic;
  36 using System.Runtime.InteropServices;
  37 using System.Runtime.Serialization;
  38 using System.Security;
  39 using System.Text;
  40 #if !MOONLIGHT
  41 using System.Security.AccessControl;
  42 #endif
  43
  44 namespace System.IO {
  45
  46         [Serializable]
  47         [ComVisible (true)]
  48         public sealed class DirectoryInfo : FileSystemInfo {
  49
  50                 private string current;
  51                 private string parent;
  52
  53 #if MOONLIGHT
  54                 internal DirectoryInfo ()
  55                 {
  56                 }
  57 #endif
  58                 public DirectoryInfo (string path) : this (path, false)
  59                 {
  60                 }
  61
  62                 internal DirectoryInfo (string path, bool simpleOriginalPath)
  63                 {
  64                         CheckPath (path);
  65
  66                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
  67
  68                         FullPath = Path.GetFullPath (path);
  69                         if (simpleOriginalPath)
  70                                 OriginalPath = Path.GetFileName (path);
  71                         else
  72                                 OriginalPath = path;
  73
  74                         Initialize ();
  75                 }
  76
  77                 private DirectoryInfo (SerializationInfo info, StreamingContext context)
  78                         : base (info, context)
  79                 {
  80                         Initialize ();
  81                 }
  82
  83                 void Initialize ()
  84                 {
  85                         int len = FullPath.Length - 1;
  86                         if ((len > 1) && (FullPath [len] == Path.DirectorySeparatorChar))
  87                                 len--;
  88                         int last = FullPath.LastIndexOf (Path.DirectorySeparatorChar, len);
  89                         if ((last == -1) || ((last == 0) && (len == 0))) {
  90                                 current = FullPath;
  91                                 parent = null;
  92                         } else {
  93                                 current = FullPath.Substring (last + 1, len - last);
  94                                 if (last == 0 && !Environment.IsRunningOnWindows)
  95                                         parent = Path.DirectorySeparatorStr;
  96                                 else
  97                                         parent = FullPath.Substring (0, last);
  98                                 // adjust for drives, i.e. a special case for windows
  99                                 if (Environment.IsRunningOnWindows) {
 100                                         if ((parent.Length == 2) && (parent [1] == ':') && Char.IsLetter (parent [0]))
 101                                                 parent += Path.DirectorySeparatorChar;
 102                                 }
 103                         }
 104                 }
 105
 106                 // properties
 107
 108                 public override bool Exists {
 109                         get {
 110                                 Refresh (false);
 111
 112                                 if (stat.Attributes == MonoIO.InvalidFileAttributes)
 113                                         return false;
 114
 115                                 if ((stat.Attributes & FileAttributes.Directory) == 0)
 116                                         return false;
 117
 118                                 return true;
 119                         }
 120                 }
 121
 122                 public override string Name {
 123                         get { return current; }
 124                 }
 125
 126                 public DirectoryInfo Parent {
 127                         get {
 128                                 if ((parent == null) || (parent.Length == 0))
 129                                         return null;
 130                                 return new DirectoryInfo (parent);
 131                         }
 132                 }
 133
 134                 public DirectoryInfo Root {
 135                         get {
 136                                 string root = Path.GetPathRoot (FullPath);
 137                                 if (root == null)
 138                                         return null;
 139
 140                                 return new DirectoryInfo (root);
 141                         }
 142                 }
 143
 144                 // creational methods
 145
 146                 public void Create ()
 147                 {
 148                         Directory.CreateDirectory (FullPath);
 149                 }
 150
 151                 public DirectoryInfo CreateSubdirectory (string path)
 152                 {
 153                         CheckPath (path);
 154
 155                         path = Path.Combine (FullPath, path);
 156                         Directory.CreateDirectory (path);
 157                         return new DirectoryInfo (path);
 158                 }
 159
 160                 // directory listing methods
 161
 162                 public FileInfo [] GetFiles ()
 163                 {
 164                         return GetFiles ("*");
 165                 }
 166
 167                 public FileInfo [] GetFiles (string searchPattern)
 168                 {
 169                         if (searchPattern == null)
 170                                 throw new ArgumentNullException ("searchPattern");
 171
 172                         string [] names = Directory.GetFiles (FullPath, searchPattern);
 173
 174                         FileInfo[] infos = new FileInfo [names.Length];
 175                         int i = 0;
 176                         foreach (string name in names)
 177                                 infos [i++] = new FileInfo (name);
 178
 179                         return infos;
 180                 }
 181
 182                 public DirectoryInfo [] GetDirectories ()
 183                 {
 184                         return GetDirectories ("*");
 185                 }
 186
 187                 public DirectoryInfo [] GetDirectories (string searchPattern)
 188                 {
 189                         if (searchPattern == null)
 190                                 throw new ArgumentNullException ("searchPattern");
 191
 192                         string [] names = Directory.GetDirectories (FullPath, searchPattern);
 193
 194                         DirectoryInfo[] infos = new DirectoryInfo [names.Length];
 195                         int i = 0;
 196                         foreach (string name in names)
 197                                 infos [i++] = new DirectoryInfo (name);
 198
 199                         return infos;
 200                 }
 201
 202                 public FileSystemInfo [] GetFileSystemInfos ()
 203                 {
 204                         return GetFileSystemInfos ("*");
 205                 }
 206
 207                 public FileSystemInfo [] GetFileSystemInfos (string searchPattern)
 208                 {
 209                         return GetFileSystemInfos (searchPattern, SearchOption.TopDirectoryOnly);
 210                 }
 211
 212 #if NET_4_0
 213                 public
 214 #endif
 215                 FileSystemInfo [] GetFileSystemInfos (string searchPattern, SearchOption searchOption)
 216                 {
 217                         if (searchPattern == null)
 218                                 throw new ArgumentNullException ("searchPattern");
 219                         if (searchOption != SearchOption.TopDirectoryOnly && searchOption != SearchOption.AllDirectories)
 220                                 throw new ArgumentOutOfRangeException ("searchOption", "Must be TopDirectoryOnly or AllDirectories");
 221                         if (!Directory.Exists (FullPath))
 222                                 throw new IOException ("Invalid directory");
 223
 224                         List<FileSystemInfo> infos = new List<FileSystemInfo> ();
 225                         InternalGetFileSystemInfos (searchPattern, searchOption, infos);
 226                         return infos.ToArray ();
 227                 }
 228
 229                 void InternalGetFileSystemInfos (string searchPattern, SearchOption searchOption, List<FileSystemInfo> infos)
 230                 {
 231                         // UnauthorizedAccessExceptions might happen here and break everything for SearchOption.AllDirectories
 232                         string [] dirs = Directory.GetDirectories (FullPath, searchPattern);
 233                         string [] files = Directory.GetFiles (FullPath, searchPattern);
 234
 235                         Array.ForEach<string> (dirs, (dir) => { infos.Add (new DirectoryInfo (dir)); });
 236                         Array.ForEach<string> (files, (file) => { infos.Add (new FileInfo (file)); });
 237                         if (dirs.Length == 0 || searchOption == SearchOption.TopDirectoryOnly)
 238                                 return;
 239
 240                         foreach (string dir in dirs) {
 241                                 DirectoryInfo dinfo = new DirectoryInfo (dir);
 242                                 dinfo.InternalGetFileSystemInfos (searchPattern, searchOption, infos);
 243                         }
 244                 }
 245
 246                 // directory management methods
 247
 248                 public override void Delete ()
 249                 {
 250                         Delete (false);
 251                 }
 252
 253                 public void Delete (bool recursive)
 254                 {
 255                         Directory.Delete (FullPath, recursive);
 256                 }
 257
 258                 public void MoveTo (string destDirName)
 259                 {
 260                         if (destDirName == null)
 261                                 throw new ArgumentNullException ("destDirName");
 262                         if (destDirName.Length == 0)
 263                                 throw new ArgumentException ("An empty file name is not valid.", "destDirName");
 264
 265                         Directory.Move (FullPath, Path.GetFullPath (destDirName));
 266                         FullPath = OriginalPath = destDirName;
 267                         Initialize ();
 268                 }
 269
 270                 public override string ToString ()
 271                 {
 272                         return OriginalPath;
 273                 }
 274
 275 #if !MOONLIGHT
 276                 public DirectoryInfo[] GetDirectories (string searchPattern, SearchOption searchOption)
 277                 {
 278                     //NULL-check of searchPattern is done in Directory.GetDirectories
 279                         string [] names = Directory.GetDirectories (FullPath, searchPattern, searchOption);
 280                         //Convert the names to DirectoryInfo instances
 281                         DirectoryInfo[] infos = new DirectoryInfo [names.Length];
 282                         for (int i = 0; i<names.Length; ++i){
 283                                 string name = names[i];
 284                                 infos [i] = new DirectoryInfo (name);
 285                         }
 286                         return infos;
 287                 }
 288
 289                 internal int GetFilesSubdirs (ArrayList l, string pattern)
 290                 {
 291                         int count;
 292                         FileInfo [] thisdir = null;
 293
 294                         try {
 295                                 thisdir = GetFiles (pattern);
 296                         } catch (System.UnauthorizedAccessException){
 297                                 return 0;
 298                         }
 299
 300                         count = thisdir.Length;
 301                         l.Add (thisdir);
 302
 303                         foreach (DirectoryInfo subdir in GetDirectories ()){
 304                                 count += subdir.GetFilesSubdirs (l, pattern);
 305                         }
 306                         return count;
 307                 }
 308
 309                 public FileInfo[] GetFiles (string searchPattern, SearchOption searchOption)
 310                 {
 311                         switch (searchOption) {
 312                         case SearchOption.TopDirectoryOnly:
 313                                 return GetFiles (searchPattern);
 314                         case SearchOption.AllDirectories: {
 315                                 ArrayList groups = new ArrayList ();
 316                                 int count = GetFilesSubdirs (groups, searchPattern);
 317                                 int current = 0;
 318
 319                                 FileInfo [] all = new FileInfo [count];
 320                                 foreach (FileInfo [] p in groups){
 321                                         p.CopyTo (all, current);
 322                                         current += p.Length;
 323                                 }
 324                                 return all;
 325                         }
 326                         default:
 327                                 string msg = Locale.GetText ("Invalid enum value '{0}' for '{1}'.", searchOption, "SearchOption");
 328                                 throw new ArgumentOutOfRangeException ("searchOption", msg);
 329                         }
 330                 }
 331
 332                 // access control methods
 333
 334                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 335                 public void Create (DirectorySecurity directorySecurity)
 336                 {
 337                         if (directorySecurity != null)
 338                                 throw new UnauthorizedAccessException ();
 339                         Create ();
 340                 }
 341
 342                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 343                 public DirectoryInfo CreateSubdirectory (string path, DirectorySecurity directorySecurity)
 344                 {
 345                         if (directorySecurity != null)
 346                                 throw new UnauthorizedAccessException ();
 347                         return CreateSubdirectory (path);
 348                 }
 349
 350                 public DirectorySecurity GetAccessControl ()
 351                 {
 352                         return Directory.GetAccessControl (FullPath);
 353                 }
 354
 355                 public DirectorySecurity GetAccessControl (AccessControlSections includeSections)
 356                 {
 357                         return Directory.GetAccessControl (FullPath, includeSections);
 358                 }
 359
 360                 public void SetAccessControl (DirectorySecurity directorySecurity)
 361                 {
 362                         Directory.SetAccessControl (FullPath, directorySecurity);
 363                 }
 364 #endif
 365
 366 #if NET_4_0 || MOONLIGHT || MOBILE
 367
 368                 public IEnumerable<DirectoryInfo> EnumerateDirectories ()
 369                 {
 370                         return EnumerateDirectories ("*", SearchOption.TopDirectoryOnly);
 371                 }
 372
 373                 public IEnumerable<DirectoryInfo> EnumerateDirectories (string searchPattern)
 374                 {
 375                         return EnumerateDirectories (searchPattern, SearchOption.TopDirectoryOnly);
 376                 }
 377
 378                 public IEnumerable<DirectoryInfo> EnumerateDirectories (string searchPattern, SearchOption searchOption)
 379                 {
 380                         if (searchPattern == null)
 381                                 throw new ArgumentNullException ("searchPattern");
 382
 383                         return CreateEnumerateDirectoriesIterator (searchPattern, searchOption);
 384                 }
 385
 386                 IEnumerable<DirectoryInfo> CreateEnumerateDirectoriesIterator (string searchPattern, SearchOption searchOption)
 387                 {
 388                         foreach (string name in Directory.EnumerateDirectories (FullPath, searchPattern, searchOption))
 389                                 yield return new DirectoryInfo (name);
 390                 }
 391
 392                 public IEnumerable<FileInfo> EnumerateFiles ()
 393                 {
 394                         return EnumerateFiles ("*", SearchOption.TopDirectoryOnly);
 395                 }
 396
 397                 public IEnumerable<FileInfo> EnumerateFiles (string searchPattern)
 398                 {
 399                         return EnumerateFiles (searchPattern, SearchOption.TopDirectoryOnly);
 400                 }
 401
 402                 public IEnumerable<FileInfo> EnumerateFiles (string searchPattern, SearchOption searchOption)
 403                 {
 404                         if (searchPattern == null)
 405                                 throw new ArgumentNullException ("searchPattern");
 406
 407                         return CreateEnumerateFilesIterator (searchPattern, searchOption);
 408                 }
 409
 410                 IEnumerable<FileInfo> CreateEnumerateFilesIterator (string searchPattern, SearchOption searchOption)
 411                 {
 412                         foreach (string name in Directory.EnumerateFiles (FullPath, searchPattern, searchOption))
 413                                 yield return new FileInfo (name);
 414                 }
 415
 416                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos ()
 417                 {
 418                         return EnumerateFileSystemInfos ("*", SearchOption.TopDirectoryOnly);
 419                 }
 420
 421                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string searchPattern)
 422                 {
 423                         return EnumerateFileSystemInfos (searchPattern, SearchOption.TopDirectoryOnly);
 424                 }
 425
 426                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string searchPattern, SearchOption searchOption)
 427                 {
 428                         if (searchPattern == null)
 429                                 throw new ArgumentNullException ("searchPattern");
 430                         if (searchOption != SearchOption.TopDirectoryOnly && searchOption != SearchOption.AllDirectories)
 431                                 throw new ArgumentOutOfRangeException ("searchoption");
 432
 433                         return EnumerateFileSystemInfos (FullPath, searchPattern, searchOption);
 434                 }
 435
 436                 static internal IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string full, string searchPattern, SearchOption searchOption)
 437                 {
 438                         string path_with_pattern = Path.Combine (full, searchPattern);
 439                         IntPtr handle;
 440                         MonoIOError error;
 441                         FileAttributes rattr;
 442                         bool subdirs = searchOption == SearchOption.AllDirectories;
 443
 444                         Path.Validate (full);
 445
 446                         string s = MonoIO.FindFirst (full, path_with_pattern, out rattr, out error, out handle);
 447                         if (s == null)
 448                                 yield break;
 449                         if (error != 0)
 450                                 throw MonoIO.GetException (Path.GetDirectoryName (path_with_pattern), (MonoIOError) error);
 451
 452                         try {
 453                                 if (((rattr & FileAttributes.ReparsePoint) == 0)){
 454                                         if ((rattr & FileAttributes.Directory) != 0)
 455                                                 yield return new DirectoryInfo (s);
 456                                         else
 457                                                 yield return new FileInfo (s);
 458                                 }
 459
 460                                 while ((s = MonoIO.FindNext (handle, out rattr, out error)) != null){
 461                                         if ((rattr & FileAttributes.ReparsePoint) != 0)
 462                                                 continue;
 463                                         if ((rattr & FileAttributes.Directory) != 0)
 464                                                 yield return new DirectoryInfo (s);
 465                                         else
 466                                                 yield return new FileInfo (s);
 467
 468                                         if (((rattr & FileAttributes.Directory) != 0) && subdirs)
 469                                                 foreach (FileSystemInfo child in EnumerateFileSystemInfos (s, searchPattern, searchOption))
 470                                                         yield return child;
 471                                 }
 472                         } finally {
 473                                 MonoIO.FindClose (handle);
 474                         }
 475                 }
 476
 477
 478 #endif
 479         }
 480 }