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 //   Marek Safar  <marek.safar@gmail.com>
  10 //
  11 // Copyright (C) 2002 Ximian, Inc.
  12 // Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
  13 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  14 // Copyright (C) 2014 Xamarin, Inc (http://www.xamarin.com)
  15 //
  16 // Permission is hereby granted, free of charge, to any person obtaining
  17 // a copy of this software and associated documentation files (the
  18 // "Software"), to deal in the Software without restriction, including
  19 // without limitation the rights to use, copy, modify, merge, publish,
  20 // distribute, sublicense, and/or sell copies of the Software, and to
  21 // permit persons to whom the Software is furnished to do so, subject to
  22 // the following conditions:
  23 //
  24 // The above copyright notice and this permission notice shall be
  25 // included in all copies or substantial portions of the Software.
  26 //
  27 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  31 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  32 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  33 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  34 //
  35
  36 using System.Collections;
  37 using System.Collections.Generic;
  38 using System.Runtime.InteropServices;
  39 using System.Runtime.Serialization;
  40 using System.Security;
  41 using System.Text;
  42 using System.Security.AccessControl;
  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                 public DirectoryInfo (string path) : this (path, false)
  54                 {
  55                 }
  56
  57                 internal DirectoryInfo (string path, bool simpleOriginalPath)
  58                 {
  59                         CheckPath (path);
  60
  61                         SecurityManager.EnsureElevatedPermissions (); // this is a no-op outside moonlight
  62
  63                         FullPath = Path.GetFullPath (path);
  64                         if (simpleOriginalPath)
  65                                 OriginalPath = Path.GetFileName (path);
  66                         else
  67                                 OriginalPath = path;
  68
  69                         Initialize ();
  70                 }
  71
  72                 private DirectoryInfo (SerializationInfo info, StreamingContext context)
  73                         : base (info, context)
  74                 {
  75                         Initialize ();
  76                 }
  77
  78                 void Initialize ()
  79                 {
  80                         int len = FullPath.Length - 1;
  81                         if ((len > 1) && (FullPath [len] == Path.DirectorySeparatorChar))
  82                                 len--;
  83                         int last = FullPath.LastIndexOf (Path.DirectorySeparatorChar, len);
  84                         if ((last == -1) || ((last == 0) && (len == 0))) {
  85                                 current = FullPath;
  86                                 parent = null;
  87                         } else {
  88                                 current = FullPath.Substring (last + 1, len - last);
  89                                 if (last == 0 && !Environment.IsRunningOnWindows)
  90                                         parent = Path.DirectorySeparatorStr;
  91                                 else
  92                                         parent = FullPath.Substring (0, last);
  93                                 // adjust for drives, i.e. a special case for windows
  94                                 if (Environment.IsRunningOnWindows) {
  95                                         if ((parent.Length == 2) && (parent [1] == ':') && Char.IsLetter (parent [0]))
  96                                                 parent += Path.DirectorySeparatorChar;
  97                                 }
  98                         }
  99                 }
 100
 101                 // properties
 102
 103                 public override bool Exists {
 104                         get {
 105                                 Refresh (false);
 106
 107                                 if (stat.Attributes == MonoIO.InvalidFileAttributes)
 108                                         return false;
 109
 110                                 if ((stat.Attributes & FileAttributes.Directory) == 0)
 111                                         return false;
 112
 113                                 return true;
 114                         }
 115                 }
 116
 117                 public override string Name {
 118                         get { return current; }
 119                 }
 120
 121                 public DirectoryInfo Parent {
 122                         get {
 123                                 if ((parent == null) || (parent.Length == 0))
 124                                         return null;
 125                                 return new DirectoryInfo (parent);
 126                         }
 127                 }
 128
 129                 public DirectoryInfo Root {
 130                         get {
 131                                 string root = Path.GetPathRoot (FullPath);
 132                                 if (root == null)
 133                                         return null;
 134
 135                                 return new DirectoryInfo (root);
 136                         }
 137                 }
 138
 139                 // creational methods
 140
 141                 public void Create ()
 142                 {
 143                         Directory.CreateDirectory (FullPath);
 144                 }
 145
 146                 public DirectoryInfo CreateSubdirectory (string path)
 147                 {
 148                         CheckPath (path);
 149
 150                         path = Path.Combine (FullPath, path);
 151                         Directory.CreateDirectory (path);
 152                         return new DirectoryInfo (path);
 153                 }
 154
 155                 // directory listing methods
 156
 157                 public FileInfo [] GetFiles ()
 158                 {
 159                         return GetFiles ("*");
 160                 }
 161
 162                 public FileInfo [] GetFiles (string searchPattern)
 163                 {
 164                         if (searchPattern == null)
 165                                 throw new ArgumentNullException ("searchPattern");
 166
 167                         string [] names = Directory.GetFiles (FullPath, searchPattern);
 168
 169                         FileInfo[] infos = new FileInfo [names.Length];
 170                         int i = 0;
 171                         foreach (string name in names)
 172                                 infos [i++] = new FileInfo (name);
 173
 174                         return infos;
 175                 }
 176
 177                 public DirectoryInfo [] GetDirectories ()
 178                 {
 179                         return GetDirectories ("*");
 180                 }
 181
 182                 public DirectoryInfo [] GetDirectories (string searchPattern)
 183                 {
 184                         if (searchPattern == null)
 185                                 throw new ArgumentNullException ("searchPattern");
 186
 187                         string [] names = Directory.GetDirectories (FullPath, searchPattern);
 188
 189                         DirectoryInfo[] infos = new DirectoryInfo [names.Length];
 190                         int i = 0;
 191                         foreach (string name in names)
 192                                 infos [i++] = new DirectoryInfo (name);
 193
 194                         return infos;
 195                 }
 196
 197                 public FileSystemInfo [] GetFileSystemInfos ()
 198                 {
 199                         return GetFileSystemInfos ("*");
 200                 }
 201
 202                 public FileSystemInfo [] GetFileSystemInfos (string searchPattern)
 203                 {
 204                         return GetFileSystemInfos (searchPattern, SearchOption.TopDirectoryOnly);
 205                 }
 206
 207 #if NET_4_0
 208                 public
 209 #endif
 210                 FileSystemInfo [] GetFileSystemInfos (string searchPattern, SearchOption searchOption)
 211                 {
 212                         if (searchPattern == null)
 213                                 throw new ArgumentNullException ("searchPattern");
 214                         if (searchOption != SearchOption.TopDirectoryOnly && searchOption != SearchOption.AllDirectories)
 215                                 throw new ArgumentOutOfRangeException ("searchOption", "Must be TopDirectoryOnly or AllDirectories");
 216                         if (!Directory.Exists (FullPath))
 217                                 throw new IOException ("Invalid directory");
 218
 219                         List<FileSystemInfo> infos = new List<FileSystemInfo> ();
 220                         InternalGetFileSystemInfos (searchPattern, searchOption, infos);
 221                         return infos.ToArray ();
 222                 }
 223
 224                 void InternalGetFileSystemInfos (string searchPattern, SearchOption searchOption, List<FileSystemInfo> infos)
 225                 {
 226                         // UnauthorizedAccessExceptions might happen here and break everything for SearchOption.AllDirectories
 227                         string [] dirs = Directory.GetDirectories (FullPath, searchPattern);
 228                         string [] files = Directory.GetFiles (FullPath, searchPattern);
 229
 230                         Array.ForEach<string> (dirs, (dir) => { infos.Add (new DirectoryInfo (dir)); });
 231                         Array.ForEach<string> (files, (file) => { infos.Add (new FileInfo (file)); });
 232                         if (dirs.Length == 0 || searchOption == SearchOption.TopDirectoryOnly)
 233                                 return;
 234
 235                         foreach (string dir in dirs) {
 236                                 DirectoryInfo dinfo = new DirectoryInfo (dir);
 237                                 dinfo.InternalGetFileSystemInfos (searchPattern, searchOption, infos);
 238                         }
 239                 }
 240
 241                 // directory management methods
 242
 243                 public override void Delete ()
 244                 {
 245                         Delete (false);
 246                 }
 247
 248                 public void Delete (bool recursive)
 249                 {
 250                         Directory.Delete (FullPath, recursive);
 251                 }
 252
 253                 public void MoveTo (string destDirName)
 254                 {
 255                         if (destDirName == null)
 256                                 throw new ArgumentNullException ("destDirName");
 257                         if (destDirName.Length == 0)
 258                                 throw new ArgumentException ("An empty file name is not valid.", "destDirName");
 259
 260                         Directory.Move (FullPath, Path.GetFullPath (destDirName));
 261                         FullPath = OriginalPath = destDirName;
 262                         Initialize ();
 263                 }
 264
 265                 public override string ToString ()
 266                 {
 267                         return OriginalPath;
 268                 }
 269
 270                 public DirectoryInfo[] GetDirectories (string searchPattern, SearchOption searchOption)
 271                 {
 272                     //NULL-check of searchPattern is done in Directory.GetDirectories
 273                         string [] names = Directory.GetDirectories (FullPath, searchPattern, searchOption);
 274                         //Convert the names to DirectoryInfo instances
 275                         DirectoryInfo[] infos = new DirectoryInfo [names.Length];
 276                         for (int i = 0; i<names.Length; ++i){
 277                                 string name = names[i];
 278                                 infos [i] = new DirectoryInfo (name);
 279                         }
 280                         return infos;
 281                 }
 282
 283                 internal int GetFilesSubdirs (ArrayList l, string pattern)
 284                 {
 285                         int count;
 286                         FileInfo [] thisdir = null;
 287
 288                         try {
 289                                 thisdir = GetFiles (pattern);
 290                         } catch (System.UnauthorizedAccessException){
 291                                 return 0;
 292                         }
 293
 294                         count = thisdir.Length;
 295                         l.Add (thisdir);
 296
 297                         foreach (DirectoryInfo subdir in GetDirectories ()){
 298                                 count += subdir.GetFilesSubdirs (l, pattern);
 299                         }
 300                         return count;
 301                 }
 302
 303                 public FileInfo[] GetFiles (string searchPattern, SearchOption searchOption)
 304                 {
 305                         switch (searchOption) {
 306                         case SearchOption.TopDirectoryOnly:
 307                                 return GetFiles (searchPattern);
 308                         case SearchOption.AllDirectories: {
 309                                 ArrayList groups = new ArrayList ();
 310                                 int count = GetFilesSubdirs (groups, searchPattern);
 311                                 int current = 0;
 312
 313                                 FileInfo [] all = new FileInfo [count];
 314                                 foreach (FileInfo [] p in groups){
 315                                         p.CopyTo (all, current);
 316                                         current += p.Length;
 317                                 }
 318                                 return all;
 319                         }
 320                         default:
 321                                 string msg = Locale.GetText ("Invalid enum value '{0}' for '{1}'.", searchOption, "SearchOption");
 322                                 throw new ArgumentOutOfRangeException ("searchOption", msg);
 323                         }
 324                 }
 325
 326                 // access control methods
 327
 328                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 329                 public void Create (DirectorySecurity directorySecurity)
 330                 {
 331                         if (directorySecurity != null)
 332                                 throw new UnauthorizedAccessException ();
 333                         Create ();
 334                 }
 335
 336                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 337                 public DirectoryInfo CreateSubdirectory (string path, DirectorySecurity directorySecurity)
 338                 {
 339                         if (directorySecurity != null)
 340                                 throw new UnauthorizedAccessException ();
 341                         return CreateSubdirectory (path);
 342                 }
 343
 344                 public DirectorySecurity GetAccessControl ()
 345                 {
 346                         return Directory.GetAccessControl (FullPath);
 347                 }
 348
 349                 public DirectorySecurity GetAccessControl (AccessControlSections includeSections)
 350                 {
 351                         return Directory.GetAccessControl (FullPath, includeSections);
 352                 }
 353
 354                 public void SetAccessControl (DirectorySecurity directorySecurity)
 355                 {
 356                         Directory.SetAccessControl (FullPath, directorySecurity);
 357                 }
 358
 359 #if NET_4_0
 360
 361                 public IEnumerable<DirectoryInfo> EnumerateDirectories ()
 362                 {
 363                         return EnumerateDirectories ("*", SearchOption.TopDirectoryOnly);
 364                 }
 365
 366                 public IEnumerable<DirectoryInfo> EnumerateDirectories (string searchPattern)
 367                 {
 368                         return EnumerateDirectories (searchPattern, SearchOption.TopDirectoryOnly);
 369                 }
 370
 371                 public IEnumerable<DirectoryInfo> EnumerateDirectories (string searchPattern, SearchOption searchOption)
 372                 {
 373                         if (searchPattern == null)
 374                                 throw new ArgumentNullException ("searchPattern");
 375
 376                         return CreateEnumerateDirectoriesIterator (searchPattern, searchOption);
 377                 }
 378
 379                 IEnumerable<DirectoryInfo> CreateEnumerateDirectoriesIterator (string searchPattern, SearchOption searchOption)
 380                 {
 381                         foreach (string name in Directory.EnumerateDirectories (FullPath, searchPattern, searchOption))
 382                                 yield return new DirectoryInfo (name);
 383                 }
 384
 385                 public IEnumerable<FileInfo> EnumerateFiles ()
 386                 {
 387                         return EnumerateFiles ("*", SearchOption.TopDirectoryOnly);
 388                 }
 389
 390                 public IEnumerable<FileInfo> EnumerateFiles (string searchPattern)
 391                 {
 392                         return EnumerateFiles (searchPattern, SearchOption.TopDirectoryOnly);
 393                 }
 394
 395                 public IEnumerable<FileInfo> EnumerateFiles (string searchPattern, SearchOption searchOption)
 396                 {
 397                         if (searchPattern == null)
 398                                 throw new ArgumentNullException ("searchPattern");
 399
 400                         return CreateEnumerateFilesIterator (searchPattern, searchOption);
 401                 }
 402
 403                 IEnumerable<FileInfo> CreateEnumerateFilesIterator (string searchPattern, SearchOption searchOption)
 404                 {
 405                         foreach (string name in Directory.EnumerateFiles (FullPath, searchPattern, searchOption))
 406                                 yield return new FileInfo (name);
 407                 }
 408
 409                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos ()
 410                 {
 411                         return EnumerateFileSystemInfos ("*", SearchOption.TopDirectoryOnly);
 412                 }
 413
 414                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string searchPattern)
 415                 {
 416                         return EnumerateFileSystemInfos (searchPattern, SearchOption.TopDirectoryOnly);
 417                 }
 418
 419                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string searchPattern, SearchOption searchOption)
 420                 {
 421                         if (searchPattern == null)
 422                                 throw new ArgumentNullException ("searchPattern");
 423                         if (searchOption != SearchOption.TopDirectoryOnly && searchOption != SearchOption.AllDirectories)
 424                                 throw new ArgumentOutOfRangeException ("searchoption");
 425
 426                         return EnumerateFileSystemInfos (FullPath, searchPattern, searchOption);
 427                 }
 428
 429                 static internal IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string full, string searchPattern, SearchOption searchOption)
 430                 {
 431                         string path_with_pattern = Path.Combine (full, searchPattern);
 432                         IntPtr handle;
 433                         MonoIOError error;
 434                         FileAttributes rattr;
 435                         bool subdirs = searchOption == SearchOption.AllDirectories;
 436
 437                         Path.Validate (full);
 438
 439                         string s = MonoIO.FindFirst (full, path_with_pattern, out rattr, out error, out handle);
 440                         if (s == null)
 441                                 yield break;
 442                         if (error != 0)
 443                                 throw MonoIO.GetException (Path.GetDirectoryName (path_with_pattern), (MonoIOError) error);
 444
 445                         try {
 446                                 do {
 447                                         if (((rattr & FileAttributes.ReparsePoint) == 0)){
 448                                                 if ((rattr & FileAttributes.Directory) != 0)
 449                                                         yield return new DirectoryInfo (s);
 450                                                 else
 451                                                         yield return new FileInfo (s);
 452                                         }
 453
 454                                         if (((rattr & FileAttributes.Directory) != 0) && subdirs)
 455                                                 foreach (FileSystemInfo child in EnumerateFileSystemInfos (s, searchPattern, searchOption))
 456                                                         yield return child;
 457
 458                                 } while ((s = MonoIO.FindNext (handle, out rattr, out error)) != null);
 459                         } finally {
 460                                 MonoIO.FindClose (handle);
 461                         }
 462                 }
 463
 464
 465 #endif
 466         }
 467 }