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                                 if (FullPath == "/")
  62                                         return this;
  63                                 string dirname = UnixPath.GetDirectoryName (FullPath);
  64                                 if (dirname == "")
  65                                         throw new InvalidOperationException ("Do not know parent directory for path `" + FullPath + "'");
  66                                 return new UnixDirectoryInfo (dirname);
  67                         }
  68                 }
  69
  70                 public UnixDirectoryInfo Root {
  71                         get {
  72                                 string root = UnixPath.GetPathRoot (FullPath);
  73                                 if (root == null)
  74                                         return null;
  75                                 return new UnixDirectoryInfo (root);
  76                         }
  77                 }
  78
  79                 [CLSCompliant (false)]
  80                 public void Create (Mono.Unix.Native.FilePermissions mode)
  81                 {
  82                         int r = Mono.Unix.Native.Syscall.mkdir (FullPath, mode);
  83                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
  84                         base.Refresh ();
  85                 }
  86
  87                 public void Create (FileAccessPermissions mode)
  88                 {
  89                         Create ((Native.FilePermissions) mode);
  90                 }
  91
  92                 public void Create ()
  93                 {
  94                         Mono.Unix.Native.FilePermissions mode =
  95                                 Mono.Unix.Native.FilePermissions.ACCESSPERMS;
  96                         Create (mode);
  97                 }
  98
  99                 public override void Delete ()
 100                 {
 101                         Delete (false);
 102                 }
 103
 104                 public void Delete (bool recursive)
 105                 {
 106                         if (recursive) {
 107                                 foreach (UnixFileSystemInfo e in GetFileSystemEntries ()) {
 108                                         UnixDirectoryInfo d = e as UnixDirectoryInfo;
 109                                         if (d != null)
 110                                                 d.Delete (true);
 111                                         else
 112                                                 e.Delete ();
 113                                 }
 114                         }
 115                         int r = Native.Syscall.rmdir (FullPath);
 116                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
 117                         base.Refresh ();
 118                 }
 119
 120                 public Native.Dirent[] GetEntries ()
 121                 {
 122                         IntPtr dirp = Native.Syscall.opendir (FullPath);
 123                         if (dirp == IntPtr.Zero)
 124                                 UnixMarshal.ThrowExceptionForLastError ();
 125
 126                         bool complete = false;
 127                         try {
 128                                 Native.Dirent[] entries = GetEntries (dirp);
 129                                 complete = true;
 130                                 return entries;
 131                         }
 132                         finally {
 133                                 int r = Native.Syscall.closedir (dirp);
 134                                 // don't throw an exception if an exception is in progress
 135                                 if (complete)
 136                                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
 137                         }
 138                 }
 139
 140                 private static Native.Dirent[] GetEntries (IntPtr dirp)
 141                 {
 142                         ArrayList entries = new ArrayList ();
 143
 144                         int r;
 145                         IntPtr result;
 146                         do {
 147                                 Native.Dirent d = new Native.Dirent ();
 148                                 r = Native.Syscall.readdir_r (dirp, d, out result);
 149                                 if (r == 0 && result != IntPtr.Zero)
 150                                         // don't include current & parent dirs
 151                                         if (d.d_name != "." && d.d_name != "..")
 152                                                 entries.Add (d);
 153                         } while  (r == 0 && result != IntPtr.Zero);
 154                         if (r != 0)
 155                                 UnixMarshal.ThrowExceptionForLastErrorIf (r);
 156
 157                         return (Native.Dirent[]) entries.ToArray (typeof(Native.Dirent));
 158                 }
 159
 160                 public Native.Dirent[] GetEntries (Regex regex)
 161                 {
 162                         IntPtr dirp = Native.Syscall.opendir (FullPath);
 163                         if (dirp == IntPtr.Zero)
 164                                 UnixMarshal.ThrowExceptionForLastError ();
 165
 166                         try {
 167                                 return GetEntries (dirp, regex);
 168                         }
 169                         finally {
 170                                 int r = Native.Syscall.closedir (dirp);
 171                                 UnixMarshal.ThrowExceptionForLastErrorIf (r);
 172                         }
 173                 }
 174
 175                 private static Native.Dirent[] GetEntries (IntPtr dirp, Regex regex)
 176                 {
 177                         ArrayList entries = new ArrayList ();
 178
 179                         int r;
 180                         IntPtr result;
 181                         do {
 182                                 Native.Dirent d = new Native.Dirent ();
 183                                 r = Native.Syscall.readdir_r (dirp, d, out result);
 184                                 if (r == 0 && result != IntPtr.Zero && regex.Match (d.d_name).Success) {
 185                                         // don't include current & parent dirs
 186                                         if (d.d_name != "." && d.d_name != "..")
 187                                                 entries.Add (d);
 188                                 }
 189                         } while  (r == 0 && result != IntPtr.Zero);
 190                         if (r != 0)
 191                                 UnixMarshal.ThrowExceptionForLastError ();
 192
 193                         return (Native.Dirent[]) entries.ToArray (typeof(Native.Dirent));
 194                 }
 195
 196                 public Native.Dirent[] GetEntries (string regex)
 197                 {
 198                         Regex re = new Regex (regex);
 199                         return GetEntries (re);
 200                 }
 201
 202                 public UnixFileSystemInfo[] GetFileSystemEntries ()
 203                 {
 204                         Native.Dirent[] dentries = GetEntries ();
 205                         return GetFileSystemEntries (dentries);
 206                 }
 207
 208                 private UnixFileSystemInfo[] GetFileSystemEntries (Native.Dirent[] dentries)
 209                 {
 210                         UnixFileSystemInfo[] entries = new UnixFileSystemInfo[dentries.Length];
 211                         for (int i = 0; i != entries.Length; ++i)
 212                                 entries [i] = UnixFileSystemInfo.GetFileSystemEntry (
 213                                                 UnixPath.Combine (FullPath, dentries[i].d_name));
 214                         return entries;
 215                 }
 216
 217                 public UnixFileSystemInfo[] GetFileSystemEntries (Regex regex)
 218                 {
 219                         Native.Dirent[] dentries = GetEntries (regex);
 220                         return GetFileSystemEntries (dentries);
 221                 }
 222
 223                 public UnixFileSystemInfo[] GetFileSystemEntries (string regex)
 224                 {
 225                         Regex re = new Regex (regex);
 226                         return GetFileSystemEntries (re);
 227                 }
 228
 229                 public static string GetCurrentDirectory ()
 230                 {
 231                         StringBuilder buf = new StringBuilder (16);
 232                         IntPtr r = IntPtr.Zero;
 233                         do {
 234                                 buf.Capacity *= 2;
 235                                 r = Native.Syscall.getcwd (buf, (ulong) buf.Capacity);
 236                         } while (r == IntPtr.Zero && Native.Syscall.GetLastError() == Native.Errno.ERANGE);
 237                         if (r == IntPtr.Zero)
 238                                 UnixMarshal.ThrowExceptionForLastError ();
 239                         return buf.ToString ();
 240                 }
 241
 242                 public static void SetCurrentDirectory (string path)
 243                 {
 244                         int r = Native.Syscall.chdir (path);
 245                         UnixMarshal.ThrowExceptionForLastErrorIf (r);
 246                 }
 247         }
 248 }
 249
 250 // vim: noexpandtab