mcs/class/Mono.Posix/Mono.Unix/UnixDirectoryInfo.cs

   1 //
   2 // Mono.Unix/UnixDirectoryInfo.cs
   3 //
   4 // Authors:
   5 //   Jonathan Pryor (jonpryor@vt.edu)
   6 //
   7 // (C) 2004-2006 Jonathan Pryor
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections;
  31 using System.IO;
  32 using System.Text;
  33 using System.Text.RegularExpressions;
  34 using Mono.Unix;
  35
  36 namespace Mono.Unix {
  37
  38         public sealed class UnixDirectoryInfo : UnixFileSystemInfo
  39         {
  40                 public UnixDirectoryInfo (string path)
  41                         : base (path)
  42                 {
  43                 }
  44
  45                 internal UnixDirectoryInfo (string path, Native.Stat stat)
  46                         : base (path, stat)
  47                 {
  48                 }
  49
  50                 public override string Name {
  51                         get {
  52                                 string r = UnixPath.GetFileName (FullPath);
  53                                 if (r == null || r.Length == 0)
  54                                         return FullPath;
  55                                 return r;
  56                         }
  57                 }
  58
  59                 public UnixDirectoryInfo Parent {
  60                         get {
  61                                 string dirname = UnixPath.GetDirectoryName (FullPath);
  62                                 if (dirname == null)
  63                                         return null;
  64                                 return new UnixDirectoryInfo (dirname);
  65                         }
  66                 }
  67
  68                 public UnixDirectoryInfo Root {
  69                         get {
  70                                 string root = UnixPath.GetPathRoot (FullPath);
  71                                 if (root == null)
  72                                         return null;
  73                                 return new UnixDirectoryInfo (root);
  74                         }
  75                 }
  76
  77                 [CLSCompliant (false)]
  78                 [Obsolete ("Use Create(Mono.Unix.Native.FilePermissions)")]
  79                 public void Create (FilePermissions mode)
  80                 {
  81                         Mono.Unix.Native.FilePermissions _mode =
  82                                 (Mono.Unix.Native.FilePermissions) mode;
  83                         Create (_mode);
  84                 }
  85
  86                 [CLSCompliant (false)]
  87                 public void Create (Mono.Unix.Native.FilePermissions mode)
  88                 {
  89                         int r = Mono.Unix.Native.Syscall.mkdir (FullPath, mode);
  90                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
  91                         base.Refresh ();
  92                 }
  93
  94                 public void Create (FileAccessPermissions mode)
  95                 {
  96                         Create ((Native.FilePermissions) mode);
  97                 }
  98
  99                 public void Create ()
 100                 {
 101                         Mono.Unix.Native.FilePermissions mode =
 102                                 Mono.Unix.Native.FilePermissions.ACCESSPERMS;
 103                         Create (mode);
 104                 }
 105
 106                 public override void Delete ()
 107                 {
 108                         Delete (false);
 109                 }
 110
 111                 public void Delete (bool recursive)
 112                 {
 113                         if (recursive) {
 114                                 foreach (UnixFileSystemInfo e in GetFileSystemEntries ()) {
 115                                         UnixDirectoryInfo d = e as UnixDirectoryInfo;
 116                                         if (d != null)
 117                                                 d.Delete (true);
 118                                         else
 119                                                 e.Delete ();
 120                                 }
 121                         }
 122                         int r = Native.Syscall.rmdir (FullPath);
 123                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
 124                         base.Refresh ();
 125                 }
 126
 127                 public Native.Dirent[] GetEntries ()
 128                 {
 129                         IntPtr dirp = Native.Syscall.opendir (FullPath);
 130                         if (dirp == IntPtr.Zero)
 131                                 UnixMarshal.ThrowExceptionForLastError ();
 132
 133                         bool complete = false;
 134                         try {
 135                                 Native.Dirent[] entries = GetEntries (dirp);
 136                                 complete = true;
 137                                 return entries;
 138                         }
 139                         finally {
 140                                 int r = Native.Syscall.closedir (dirp);
 141                                 // don't throw an exception if an exception is in progress
 142                                 if (complete)
 143                                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
 144                         }
 145                 }
 146
 147                 private static Native.Dirent[] GetEntries (IntPtr dirp)
 148                 {
 149                         ArrayList entries = new ArrayList ();
 150
 151                         int r;
 152                         IntPtr result;
 153                         do {
 154                                 Native.Dirent d = new Native.Dirent ();
 155                                 r = Native.Syscall.readdir_r (dirp, d, out result);
 156                                 if (r == 0 && result != IntPtr.Zero)
 157                                         // don't include current & parent dirs
 158                                         if (d.d_name != "." && d.d_name != "..")
 159                                                 entries.Add (d);
 160                         } while  (r == 0 && result != IntPtr.Zero);
 161                         if (r != 0)
 162                                 UnixMarshal.ThrowExceptionForLastErrorIf (r);
 163
 164                         return (Native.Dirent[]) entries.ToArray (typeof(Native.Dirent));
 165                 }
 166
 167                 public Native.Dirent[] GetEntries (Regex regex)
 168                 {
 169                         IntPtr dirp = Native.Syscall.opendir (FullPath);
 170                         if (dirp == IntPtr.Zero)
 171                                 UnixMarshal.ThrowExceptionForLastError ();
 172
 173                         try {
 174                                 return GetEntries (dirp, regex);
 175                         }
 176                         finally {
 177                                 int r = Native.Syscall.closedir (dirp);
 178                                 UnixMarshal.ThrowExceptionForLastErrorIf (r);
 179                         }
 180                 }
 181
 182                 private static Native.Dirent[] GetEntries (IntPtr dirp, Regex regex)
 183                 {
 184                         ArrayList entries = new ArrayList ();
 185
 186                         int r;
 187                         IntPtr result;
 188                         do {
 189                                 Native.Dirent d = new Native.Dirent ();
 190                                 r = Native.Syscall.readdir_r (dirp, d, out result);
 191                                 if (r == 0 && result != IntPtr.Zero && regex.Match (d.d_name).Success) {
 192                                         // don't include current & parent dirs
 193                                         if (d.d_name != "." && d.d_name != "..")
 194                                                 entries.Add (d);
 195                                 }
 196                         } while  (r == 0 && result != IntPtr.Zero);
 197                         if (r != 0)
 198                                 UnixMarshal.ThrowExceptionForLastError ();
 199
 200                         return (Native.Dirent[]) entries.ToArray (typeof(Native.Dirent));
 201                 }
 202
 203                 public Native.Dirent[] GetEntries (string regex)
 204                 {
 205                         Regex re = new Regex (regex);
 206                         return GetEntries (re);
 207                 }
 208
 209                 public UnixFileSystemInfo[] GetFileSystemEntries ()
 210                 {
 211                         Native.Dirent[] dentries = GetEntries ();
 212                         return GetFileSystemEntries (dentries);
 213                 }
 214
 215                 private UnixFileSystemInfo[] GetFileSystemEntries (Native.Dirent[] dentries)
 216                 {
 217                         UnixFileSystemInfo[] entries = new UnixFileSystemInfo[dentries.Length];
 218                         for (int i = 0; i != entries.Length; ++i)
 219                                 entries [i] = UnixFileSystemInfo.Create (
 220                                                 UnixPath.Combine (FullPath, dentries[i].d_name));
 221                         return entries;
 222                 }
 223
 224                 public UnixFileSystemInfo[] GetFileSystemEntries (Regex regex)
 225                 {
 226                         Native.Dirent[] dentries = GetEntries (regex);
 227                         return GetFileSystemEntries (dentries);
 228                 }
 229
 230                 public UnixFileSystemInfo[] GetFileSystemEntries (string regex)
 231                 {
 232                         Regex re = new Regex (regex);
 233                         return GetFileSystemEntries (re);
 234                 }
 235
 236                 public static string GetCurrentDirectory ()
 237                 {
 238                         StringBuilder buf = new StringBuilder (16);
 239                         IntPtr r = IntPtr.Zero;
 240                         do {
 241                                 buf.Capacity *= 2;
 242                                 r = Native.Syscall.getcwd (buf, (ulong) buf.Capacity);
 243                         } while (r == IntPtr.Zero && Native.Syscall.GetLastError() == Native.Errno.ERANGE);
 244                         if (r == IntPtr.Zero)
 245                                 UnixMarshal.ThrowExceptionForLastError ();
 246                         return buf.ToString ();
 247                 }
 248
 249                 public static void SetCurrentDirectory (string path)
 250                 {
 251                         int r = Native.Syscall.chdir (path);
 252                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
 253                 }
 254         }
 255 }
 256
 257 // vim: noexpandtab