1 files changed, 169 insertions, 0 deletions
diff --git a/mcs/class/Mono.Posix/Mono.Unix/UnixDriveInfo.cs b/mcs/class/Mono.Posix/Mono.Unix/UnixDriveInfo.cs
new file mode 100644
index 00000000000..8eacd5cf879
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+++ b/mcs/class/Mono.Posix/Mono.Unix/UnixDriveInfo.cs
@@ -0,0 +1,169 @@
+//
+// Mono.Unix/UnixDriveInfo.cs
+//
+// Authors:
+//   Jonathan Pryor (jonpryor@vt.edu)
+//
+// (C) 2004 Jonathan Pryor
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using System.Collections;
+using System.IO;
+using Mono.Unix;
+
+namespace Mono.Unix {
+
+	public enum UnixDriveType {
+		Unknown,
+		NoRootDirectory,
+		Removable,
+		Fixed,
+		Network,
+		CDRom,
+		Ram
+	}
+
+	// All methods & properties can throw IOException
+	public sealed class UnixDriveInfo
+	{
+		private Statvfs stat;
+		private Fstab   fstab;
+
+		public UnixDriveInfo (string mountPoint)
+		{
+			if (mountPoint == null)
+				throw new ArgumentNullException ("mountPoint");
+			fstab = Syscall.getfsfile (mountPoint);
+			if (fstab == null)
+				throw new ArgumentException ("mountPoint isn't valid: " + mountPoint);
+			// throws ArgumentException if driveName isn't valid
+			// though .NET also has a DriveNotFoundException class, so maybe that's
+			// more appropriate?
+		}
+
+		public static UnixDriveInfo GetForSpecialFile (string specialFile)
+		{
+			if (specialFile == null)
+				throw new ArgumentNullException ("specialFile");
+			Fstab f = Syscall.getfsspec (specialFile);
+			if (f == null)
+				throw new ArgumentException ("specialFile isn't valid: " + specialFile);
+			return new UnixDriveInfo (f);
+		}
+
+		private UnixDriveInfo (Fstab fstab)
+		{
+			this.fstab = fstab;
+		}
+
+		public long AvailableFreeSpace {
+			get {Refresh (); return (long) (stat.f_bavail * stat.f_bsize);}
+		}
+
+		public string DriveFormat {
+			get {return fstab.fs_vfstype;}
+		}
+
+		public UnixDriveType DriveType {
+			get {return UnixDriveType.Unknown;}
+		}
+
+		// this throws no exceptions
+		public bool IsReady {
+			get {return Refresh (false);}
+		}
+
+		public string Name {
+			get {return fstab.fs_file;}
+		}
+
+		public UnixDirectoryInfo RootDirectory {
+			get {return new UnixDirectoryInfo (fstab.fs_file);}
+		}
+
+		public long TotalFreeSpace {
+			get {Refresh (); return (long) (stat.f_bfree * stat.f_bsize);}
+		}
+
+		public long TotalSize {
+			get {Refresh (); return (long) (stat.f_frsize * stat.f_blocks);}
+		}
+
+		// also throws SecurityException if caller lacks perms
+		public string VolumeLabel {
+			get {return fstab.fs_spec;}
+			// set {}
+		}
+
+		public ulong MaximumFilenameLength {
+			get {Refresh (); return stat.f_namemax;}
+		}
+
+		public static UnixDriveInfo[] GetDrives ()
+		{
+			// throws IOException, UnauthorizedAccessException (no permission)
+			Syscall.SetLastError ((Error) 0);
+			int r = Syscall.setfsent ();
+			if (r != 1)
+				throw new IOException ("Error calling setfsent(3)");
+			ArrayList entries = new ArrayList ();
+			try {
+				Fstab fs;
+				while ((fs = Syscall.getfsent()) != null) {
+					// avoid virtual entries, such as "swap"
+					if (fs.fs_file.StartsWith ("/"))
+						entries.Add (new UnixDriveInfo (fs));
+				}
+			}
+			finally {
+				Syscall.endfsent ();
+			}
+			return (UnixDriveInfo[]) entries.ToArray (typeof(UnixDriveInfo));
+		}
+
+		public override string ToString ()
+		{
+			return VolumeLabel;
+		}
+
+		private void Refresh ()
+		{
+			Refresh (true);
+		}
+
+		private bool Refresh (bool throwException)
+		{
+			int r = Syscall.statvfs (fstab.fs_file, out stat);
+			if (r == -1 && throwException) {
+				Error e = Syscall.GetLastError ();
+				throw new IOException (UnixMarshal.GetErrorDescription (e),
+					UnixMarshal.CreateExceptionForError (e));
+			}
+			else if (r == -1)
+				return false;
+			return true;
+		}
+	}
+}
+
+// vim: noexpandtab