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                 public
 208                 FileSystemInfo [] GetFileSystemInfos (string searchPattern, SearchOption searchOption)
 209                 {
 210                         if (searchPattern == null)
 211                                 throw new ArgumentNullException ("searchPattern");
 212                         if (searchOption != SearchOption.TopDirectoryOnly && searchOption != SearchOption.AllDirectories)
 213                                 throw new ArgumentOutOfRangeException ("searchOption", "Must be TopDirectoryOnly or AllDirectories");
 214                         if (!Directory.Exists (FullPath))
 215                                 throw new IOException ("Invalid directory");
 216
 217                         List<FileSystemInfo> infos = new List<FileSystemInfo> ();
 218                         InternalGetFileSystemInfos (searchPattern, searchOption, infos);
 219                         return infos.ToArray ();
 220                 }
 221
 222                 void InternalGetFileSystemInfos (string searchPattern, SearchOption searchOption, List<FileSystemInfo> infos)
 223                 {
 224                         // UnauthorizedAccessExceptions might happen here and break everything for SearchOption.AllDirectories
 225                         string [] dirs = Directory.GetDirectories (FullPath, searchPattern);
 226                         string [] files = Directory.GetFiles (FullPath, searchPattern);
 227
 228                         Array.ForEach<string> (dirs, (dir) => { infos.Add (new DirectoryInfo (dir)); });
 229                         Array.ForEach<string> (files, (file) => { infos.Add (new FileInfo (file)); });
 230                         if (dirs.Length == 0 || searchOption == SearchOption.TopDirectoryOnly)
 231                                 return;
 232
 233                         foreach (string dir in dirs) {
 234                                 DirectoryInfo dinfo = new DirectoryInfo (dir);
 235                                 dinfo.InternalGetFileSystemInfos (searchPattern, searchOption, infos);
 236                         }
 237                 }
 238
 239                 // directory management methods
 240
 241                 public override void Delete ()
 242                 {
 243                         Delete (false);
 244                 }
 245
 246                 public void Delete (bool recursive)
 247                 {
 248                         Directory.Delete (FullPath, recursive);
 249                 }
 250
 251                 public void MoveTo (string destDirName)
 252                 {
 253                         if (destDirName == null)
 254                                 throw new ArgumentNullException ("destDirName");
 255                         if (destDirName.Length == 0)
 256                                 throw new ArgumentException ("An empty file name is not valid.", "destDirName");
 257
 258                         Directory.Move (FullPath, Path.GetFullPath (destDirName));
 259                         FullPath = OriginalPath = destDirName;
 260                         Initialize ();
 261                 }
 262
 263                 public override string ToString ()
 264                 {
 265                         return OriginalPath;
 266                 }
 267
 268                 public DirectoryInfo[] GetDirectories (string searchPattern, SearchOption searchOption)
 269                 {
 270                     //NULL-check of searchPattern is done in Directory.GetDirectories
 271                         string [] names = Directory.GetDirectories (FullPath, searchPattern, searchOption);
 272                         //Convert the names to DirectoryInfo instances
 273                         DirectoryInfo[] infos = new DirectoryInfo [names.Length];
 274                         for (int i = 0; i<names.Length; ++i){
 275                                 string name = names[i];
 276                                 infos [i] = new DirectoryInfo (name);
 277                         }
 278                         return infos;
 279                 }
 280
 281                 internal int GetFilesSubdirs (ArrayList l, string pattern)
 282                 {
 283                         int count;
 284                         FileInfo [] thisdir = null;
 285
 286                         try {
 287                                 thisdir = GetFiles (pattern);
 288                         } catch (System.UnauthorizedAccessException){
 289                                 return 0;
 290                         }
 291
 292                         count = thisdir.Length;
 293                         l.Add (thisdir);
 294
 295                         foreach (DirectoryInfo subdir in GetDirectories ()){
 296                                 count += subdir.GetFilesSubdirs (l, pattern);
 297                         }
 298                         return count;
 299                 }
 300
 301                 public FileInfo[] GetFiles (string searchPattern, SearchOption searchOption)
 302                 {
 303                         switch (searchOption) {
 304                         case SearchOption.TopDirectoryOnly:
 305                                 return GetFiles (searchPattern);
 306                         case SearchOption.AllDirectories: {
 307                                 ArrayList groups = new ArrayList ();
 308                                 int count = GetFilesSubdirs (groups, searchPattern);
 309                                 int current = 0;
 310
 311                                 FileInfo [] all = new FileInfo [count];
 312                                 foreach (FileInfo [] p in groups){
 313                                         p.CopyTo (all, current);
 314                                         current += p.Length;
 315                                 }
 316                                 return all;
 317                         }
 318                         default:
 319                                 string msg = Locale.GetText ("Invalid enum value '{0}' for '{1}'.", searchOption, "SearchOption");
 320                                 throw new ArgumentOutOfRangeException ("searchOption", msg);
 321                         }
 322                 }
 323
 324                 // access control methods
 325
 326                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 327                 public void Create (DirectorySecurity directorySecurity)
 328                 {
 329                         if (directorySecurity != null)
 330                                 throw new UnauthorizedAccessException ();
 331                         Create ();
 332                 }
 333
 334                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 335                 public DirectoryInfo CreateSubdirectory (string path, DirectorySecurity directorySecurity)
 336                 {
 337                         if (directorySecurity != null)
 338                                 throw new UnauthorizedAccessException ();
 339                         return CreateSubdirectory (path);
 340                 }
 341
 342                 public DirectorySecurity GetAccessControl ()
 343                 {
 344                         return Directory.GetAccessControl (FullPath);
 345                 }
 346
 347                 public DirectorySecurity GetAccessControl (AccessControlSections includeSections)
 348                 {
 349                         return Directory.GetAccessControl (FullPath, includeSections);
 350                 }
 351
 352                 public void SetAccessControl (DirectorySecurity directorySecurity)
 353                 {
 354                         Directory.SetAccessControl (FullPath, directorySecurity);
 355                 }
 356
 357
 358                 public IEnumerable<DirectoryInfo> EnumerateDirectories ()
 359                 {
 360                         return EnumerateDirectories ("*", SearchOption.TopDirectoryOnly);
 361                 }
 362
 363                 public IEnumerable<DirectoryInfo> EnumerateDirectories (string searchPattern)
 364                 {
 365                         return EnumerateDirectories (searchPattern, SearchOption.TopDirectoryOnly);
 366                 }
 367
 368                 public IEnumerable<DirectoryInfo> EnumerateDirectories (string searchPattern, SearchOption searchOption)
 369                 {
 370                         if (searchPattern == null)
 371                                 throw new ArgumentNullException ("searchPattern");
 372
 373                         return CreateEnumerateDirectoriesIterator (searchPattern, searchOption);
 374                 }
 375
 376                 IEnumerable<DirectoryInfo> CreateEnumerateDirectoriesIterator (string searchPattern, SearchOption searchOption)
 377                 {
 378                         foreach (string name in Directory.EnumerateDirectories (FullPath, searchPattern, searchOption))
 379                                 yield return new DirectoryInfo (name);
 380                 }
 381
 382                 public IEnumerable<FileInfo> EnumerateFiles ()
 383                 {
 384                         return EnumerateFiles ("*", SearchOption.TopDirectoryOnly);
 385                 }
 386
 387                 public IEnumerable<FileInfo> EnumerateFiles (string searchPattern)
 388                 {
 389                         return EnumerateFiles (searchPattern, SearchOption.TopDirectoryOnly);
 390                 }
 391
 392                 public IEnumerable<FileInfo> EnumerateFiles (string searchPattern, SearchOption searchOption)
 393                 {
 394                         if (searchPattern == null)
 395                                 throw new ArgumentNullException ("searchPattern");
 396
 397                         return CreateEnumerateFilesIterator (searchPattern, searchOption);
 398                 }
 399
 400                 IEnumerable<FileInfo> CreateEnumerateFilesIterator (string searchPattern, SearchOption searchOption)
 401                 {
 402                         foreach (string name in Directory.EnumerateFiles (FullPath, searchPattern, searchOption))
 403                                 yield return new FileInfo (name);
 404                 }
 405
 406                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos ()
 407                 {
 408                         return EnumerateFileSystemInfos ("*", SearchOption.TopDirectoryOnly);
 409                 }
 410
 411                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string searchPattern)
 412                 {
 413                         return EnumerateFileSystemInfos (searchPattern, SearchOption.TopDirectoryOnly);
 414                 }
 415
 416                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string searchPattern, SearchOption searchOption)
 417                 {
 418                         if (searchPattern == null)
 419                                 throw new ArgumentNullException ("searchPattern");
 420                         if (searchOption != SearchOption.TopDirectoryOnly && searchOption != SearchOption.AllDirectories)
 421                                 throw new ArgumentOutOfRangeException ("searchoption");
 422
 423                         return EnumerateFileSystemInfos (FullPath, searchPattern, searchOption);
 424                 }
 425
 426                 static internal IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string full, string searchPattern, SearchOption searchOption)
 427                 {
 428                         string path_with_pattern = Path.Combine (full, searchPattern);
 429                         IntPtr handle;
 430                         MonoIOError error;
 431                         FileAttributes rattr;
 432                         bool subdirs = searchOption == SearchOption.AllDirectories;
 433
 434                         Path.Validate (full);
 435
 436                         string s = MonoIO.FindFirst (full, path_with_pattern, out rattr, out error, out handle);
 437                         if (s == null)
 438                                 yield break;
 439                         if (error != 0)
 440                                 throw MonoIO.GetException (Path.GetDirectoryName (path_with_pattern), (MonoIOError) error);
 441
 442                         try {
 443                                 do {
 444                                         if (((rattr & FileAttributes.ReparsePoint) == 0)){
 445                                                 if ((rattr & FileAttributes.Directory) != 0)
 446                                                         yield return new DirectoryInfo (s);
 447                                                 else
 448                                                         yield return new FileInfo (s);
 449                                         }
 450
 451                                         if (((rattr & FileAttributes.Directory) != 0) && subdirs)
 452                                                 foreach (FileSystemInfo child in EnumerateFileSystemInfos (s, searchPattern, searchOption))
 453                                                         yield return child;
 454
 455                                 } while ((s = MonoIO.FindNext (handle, out rattr, out error)) != null);
 456                         } finally {
 457                                 MonoIO.FindClose (handle);
 458                         }
 459                 }
 460
 461
 462         }
 463 }