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.Text;
  39 #if !NET_2_1 || MONOTOUCH
  40 using System.Security.AccessControl;
  41 #endif
  42
  43 namespace System.IO {
  44
  45         [Serializable]
  46         [ComVisible (true)]
  47         public sealed class DirectoryInfo : FileSystemInfo {
  48
  49                 private string current;
  50                 private string parent;
  51
  52                 public DirectoryInfo (string path) : this (path, false)
  53                 {
  54                 }
  55
  56                 internal DirectoryInfo (string path, bool simpleOriginalPath)
  57                 {
  58                         CheckPath (path);
  59
  60                         FullPath = Path.GetFullPath (path);
  61                         if (simpleOriginalPath)
  62                                 OriginalPath = Path.GetFileName (path);
  63                         else
  64                                 OriginalPath = path;
  65
  66                         Initialize ();
  67                 }
  68
  69                 private DirectoryInfo (SerializationInfo info, StreamingContext context)
  70                         : base (info, context)
  71                 {
  72                         Initialize ();
  73                 }
  74
  75                 void Initialize ()
  76                 {
  77                         int len = FullPath.Length - 1;
  78                         if ((len > 1) && (FullPath [len] == Path.DirectorySeparatorChar))
  79                                 len--;
  80                         int last = FullPath.LastIndexOf (Path.DirectorySeparatorChar, len);
  81                         if ((last == -1) || ((last == 0) && (len == 0))) {
  82                                 current = FullPath;
  83                                 parent = null;
  84                         } else {
  85                                 current = FullPath.Substring (last + 1, len - last);
  86                                 if (last == 0 && !Environment.IsRunningOnWindows)
  87                                         parent = Path.DirectorySeparatorStr;
  88                                 else
  89                                         parent = FullPath.Substring (0, last);
  90                                 // adjust for drives, i.e. a special case for windows
  91                                 if (Environment.IsRunningOnWindows) {
  92                                         if ((parent.Length == 2) && (parent [1] == ':') && Char.IsLetter (parent [0]))
  93                                                 parent += Path.DirectorySeparatorChar;
  94                                 }
  95                         }
  96                 }
  97
  98                 // properties
  99
 100                 public override bool Exists {
 101                         get {
 102                                 Refresh (false);
 103
 104                                 if (stat.Attributes == MonoIO.InvalidFileAttributes)
 105                                         return false;
 106
 107                                 if ((stat.Attributes & FileAttributes.Directory) == 0)
 108                                         return false;
 109
 110                                 return true;
 111                         }
 112                 }
 113
 114                 public override string Name {
 115                         get { return current; }
 116                 }
 117
 118                 public DirectoryInfo Parent {
 119                         get {
 120                                 if ((parent == null) || (parent.Length == 0))
 121                                         return null;
 122                                 return new DirectoryInfo (parent);
 123                         }
 124                 }
 125
 126                 public DirectoryInfo Root {
 127                         get {
 128                                 string root = Path.GetPathRoot (FullPath);
 129                                 if (root == null)
 130                                         return null;
 131
 132                                 return new DirectoryInfo (root);
 133                         }
 134                 }
 135
 136                 // creational methods
 137
 138                 public void Create ()
 139                 {
 140                         Directory.CreateDirectory (FullPath);
 141                 }
 142
 143                 public DirectoryInfo CreateSubdirectory (string path)
 144                 {
 145                         CheckPath (path);
 146
 147                         path = Path.Combine (FullPath, path);
 148                         Directory.CreateDirectory (path);
 149                         return new DirectoryInfo (path);
 150                 }
 151
 152                 // directory listing methods
 153
 154                 public FileInfo [] GetFiles ()
 155                 {
 156                         return GetFiles ("*");
 157                 }
 158
 159                 public FileInfo [] GetFiles (string searchPattern)
 160                 {
 161                         if (searchPattern == null)
 162                                 throw new ArgumentNullException ("searchPattern");
 163
 164                         string [] names = Directory.GetFiles (FullPath, searchPattern);
 165
 166                         FileInfo[] infos = new FileInfo [names.Length];
 167                         int i = 0;
 168                         foreach (string name in names)
 169                                 infos [i++] = new FileInfo (name);
 170
 171                         return infos;
 172                 }
 173
 174                 public DirectoryInfo [] GetDirectories ()
 175                 {
 176                         return GetDirectories ("*");
 177                 }
 178
 179                 public DirectoryInfo [] GetDirectories (string searchPattern)
 180                 {
 181                         if (searchPattern == null)
 182                                 throw new ArgumentNullException ("searchPattern");
 183
 184                         string [] names = Directory.GetDirectories (FullPath, searchPattern);
 185
 186                         DirectoryInfo[] infos = new DirectoryInfo [names.Length];
 187                         int i = 0;
 188                         foreach (string name in names)
 189                                 infos [i++] = new DirectoryInfo (name);
 190
 191                         return infos;
 192                 }
 193
 194                 public FileSystemInfo [] GetFileSystemInfos ()
 195                 {
 196                         return GetFileSystemInfos ("*");
 197                 }
 198
 199                 public FileSystemInfo [] GetFileSystemInfos (string searchPattern)
 200                 {
 201                         if (searchPattern == null)
 202                                 throw new ArgumentNullException ("searchPattern");
 203
 204                         if (!Directory.Exists (FullPath))
 205                                 throw new IOException ("Invalid directory");
 206                         string [] dirs = Directory.GetDirectories (FullPath, searchPattern);
 207                         string [] files = Directory.GetFiles (FullPath, searchPattern);
 208
 209                         FileSystemInfo[] infos = new FileSystemInfo [dirs.Length + files.Length];
 210                         int i = 0;
 211                         foreach (string dir in dirs)
 212                                 infos [i++] = new DirectoryInfo (dir);
 213                         foreach (string file in files)
 214                                 infos [i++] = new FileInfo (file);
 215
 216                         return infos;
 217                 }
 218
 219                 // directory management methods
 220
 221                 public override void Delete ()
 222                 {
 223                         Delete (false);
 224                 }
 225
 226                 public void Delete (bool recursive)
 227                 {
 228                         Directory.Delete (FullPath, recursive);
 229                 }
 230
 231                 public void MoveTo (string destDirName)
 232                 {
 233                         if (destDirName == null)
 234                                 throw new ArgumentNullException ("destDirName");
 235                         if (destDirName.Length == 0)
 236                                 throw new ArgumentException ("An empty file name is not valid.", "destDirName");
 237
 238                         Directory.Move (FullPath, Path.GetFullPath (destDirName));
 239                 }
 240
 241                 public override string ToString ()
 242                 {
 243                         return OriginalPath;
 244                 }
 245
 246 #if !NET_2_1 || MONOTOUCH
 247                 public DirectoryInfo[] GetDirectories (string searchPattern, SearchOption searchOption)
 248                 {
 249                         switch (searchOption) {
 250                         case SearchOption.TopDirectoryOnly:
 251                                 return GetDirectories (searchPattern);
 252                         case SearchOption.AllDirectories:
 253                                 Queue workq = new Queue(GetDirectories(searchPattern));
 254                                 Queue doneq = new Queue();
 255                                 while (workq.Count > 0)
 256                                         {
 257                                                 DirectoryInfo cinfo = (DirectoryInfo) workq.Dequeue();
 258                                                 DirectoryInfo[] cinfoDirs = cinfo.GetDirectories(searchPattern);
 259                                                 foreach (DirectoryInfo i in cinfoDirs) workq.Enqueue(i);
 260                                                 doneq.Enqueue(cinfo);
 261                                         }
 262
 263                                 DirectoryInfo[] infos = new DirectoryInfo[doneq.Count];
 264                                 doneq.CopyTo(infos, 0);
 265                                 return infos;
 266                         default:
 267                                 string msg = Locale.GetText ("Invalid enum value '{0}' for '{1}'.", searchOption, "SearchOption");
 268                                 throw new ArgumentOutOfRangeException ("searchOption", msg);
 269                         }
 270                 }
 271
 272                 internal int GetFilesSubdirs (ArrayList l, string pattern)
 273                 {
 274                         int count;
 275                         FileInfo [] thisdir = null;
 276
 277                         try {
 278                                 thisdir = GetFiles (pattern);
 279                         } catch (System.UnauthorizedAccessException){
 280                                 return 0;
 281                         }
 282
 283                         count = thisdir.Length;
 284                         l.Add (thisdir);
 285
 286                         foreach (DirectoryInfo subdir in GetDirectories ()){
 287                                 count += subdir.GetFilesSubdirs (l, pattern);
 288                         }
 289                         return count;
 290                 }
 291
 292                 public FileInfo[] GetFiles (string searchPattern, SearchOption searchOption)
 293                 {
 294                         switch (searchOption) {
 295                         case SearchOption.TopDirectoryOnly:
 296                                 return GetFiles (searchPattern);
 297                         case SearchOption.AllDirectories: {
 298                                 ArrayList groups = new ArrayList ();
 299                                 int count = GetFilesSubdirs (groups, searchPattern);
 300                                 int current = 0;
 301
 302                                 FileInfo [] all = new FileInfo [count];
 303                                 foreach (FileInfo [] p in groups){
 304                                         p.CopyTo (all, current);
 305                                         current += p.Length;
 306                                 }
 307                                 return all;
 308                         }
 309                         default:
 310                                 string msg = Locale.GetText ("Invalid enum value '{0}' for '{1}'.", searchOption, "SearchOption");
 311                                 throw new ArgumentOutOfRangeException ("searchOption", msg);
 312                         }
 313                 }
 314
 315                 // access control methods
 316
 317                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 318                 public void Create (DirectorySecurity directorySecurity)
 319                 {
 320                         if (directorySecurity != null)
 321                                 throw new UnauthorizedAccessException ();
 322                         Create ();
 323                 }
 324
 325                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 326                 public DirectoryInfo CreateSubdirectory (string path, DirectorySecurity directorySecurity)
 327                 {
 328                         if (directorySecurity != null)
 329                                 throw new UnauthorizedAccessException ();
 330                         return CreateSubdirectory (path);
 331                 }
 332
 333                 [MonoNotSupported ("DirectorySecurity isn't implemented")]
 334                 public DirectorySecurity GetAccessControl ()
 335                 {
 336                         throw new UnauthorizedAccessException ();
 337                 }
 338
 339                 [MonoNotSupported ("DirectorySecurity isn't implemented")]
 340                 public DirectorySecurity GetAccessControl (AccessControlSections includeSections)
 341                 {
 342                         throw new UnauthorizedAccessException ();
 343                 }
 344
 345                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 346                 public void SetAccessControl (DirectorySecurity directorySecurity)
 347                 {
 348                         if (directorySecurity != null)
 349                                 throw new ArgumentNullException ("directorySecurity");
 350                         throw new UnauthorizedAccessException ();
 351                 }
 352 #endif
 353
 354 #if NET_4_0
 355
 356                 public IEnumerable<DirectoryInfo> EnumerateDirectories ()
 357                 {
 358                         return EnumerateDirectories ("*", SearchOption.TopDirectoryOnly);
 359                 }
 360
 361                 public IEnumerable<DirectoryInfo> EnumerateDirectories (string searchPattern)
 362                 {
 363                         return EnumerateDirectories (searchPattern, SearchOption.TopDirectoryOnly);
 364                 }
 365
 366                 public IEnumerable<DirectoryInfo> EnumerateDirectories (string searchPattern, SearchOption searchOption)
 367                 {
 368                         foreach (string name in Directory.EnumerateDirectories (FullPath, searchPattern, searchOption))
 369                                 yield return new DirectoryInfo (name);
 370                 }
 371
 372                 public IEnumerable<FileInfo> EnumerateFiles ()
 373                 {
 374                         return EnumerateFiles ("*", SearchOption.TopDirectoryOnly);
 375                 }
 376
 377                 public IEnumerable<FileInfo> EnumerateFiles (string searchPattern)
 378                 {
 379                         return EnumerateFiles (searchPattern, SearchOption.TopDirectoryOnly);
 380                 }
 381
 382                 public IEnumerable<FileInfo> EnumerateFiles (string searchPattern, SearchOption searchOption)
 383                 {
 384                         foreach (string name in Directory.EnumerateFiles (FullPath, searchPattern, searchOption))
 385                                 yield return new FileInfo (name);
 386                 }
 387
 388                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos ()
 389                 {
 390                         return EnumerateFileSystemInfos ("*", SearchOption.TopDirectoryOnly);
 391                 }
 392
 393                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string searchPattern)
 394                 {
 395                         return EnumerateFileSystemInfos (searchPattern, SearchOption.TopDirectoryOnly);
 396                 }
 397
 398                 public IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string searchPattern, SearchOption searchOption)
 399                 {
 400                         if (searchPattern == null)
 401                                 throw new ArgumentNullException ("searchPattern");
 402                         if (searchOption != SearchOption.TopDirectoryOnly && searchOption != SearchOption.AllDirectories)
 403                                 throw new ArgumentOutOfRangeException ("searchoption");
 404
 405                         return EnumerateFileSystemInfos (FullPath, searchPattern, searchOption);
 406                 }
 407
 408                 static internal IEnumerable<FileSystemInfo> EnumerateFileSystemInfos (string full, string searchPattern, SearchOption searchOption)
 409                 {
 410                         string path_with_pattern = Path.Combine (full, searchPattern);
 411                         IntPtr handle;
 412                         MonoIOError error;
 413                         FileAttributes rattr;
 414                         bool subdirs = searchOption == SearchOption.AllDirectories;
 415
 416                         string s = MonoIO.FindFirst (full, path_with_pattern, out rattr, out error, out handle);
 417                         if (s == null)
 418                                 yield break;
 419                         if (error != 0)
 420                                 throw MonoIO.GetException (Path.GetDirectoryName (path_with_pattern), (MonoIOError) error);
 421
 422                         try {
 423                                 if (((rattr & FileAttributes.ReparsePoint) == 0)){
 424                                         if ((rattr & FileAttributes.Directory) != 0)
 425                                                 yield return new DirectoryInfo (s);
 426                                         else
 427                                                 yield return new FileInfo (s);
 428                                 }
 429
 430                                 while ((s = MonoIO.FindNext (handle, out rattr, out error)) != null){
 431                                         if ((rattr & FileAttributes.ReparsePoint) != 0)
 432                                                 continue;
 433                                         if ((rattr & FileAttributes.Directory) != 0)
 434                                                 yield return new DirectoryInfo (s);
 435                                         else
 436                                                 yield return new FileInfo (s);
 437
 438                                         if (((rattr & FileAttributes.Directory) != 0) && subdirs)
 439                                                 foreach (FileSystemInfo child in EnumerateFileSystemInfos (s, searchPattern, searchOption))
 440                                                         yield return child;
 441                                 }
 442                         } finally {
 443                                 MonoIO.FindClose (handle);
 444                         }
 445                 }
 446
 447
 448 #endif
 449         }
 450 }