2 // Mono.Unix/UnixDriveInfo.cs
5 // Jonathan Pryor (jonpryor@vt.edu)
7 // (C) 2004 Jonathan Pryor
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:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
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.
30 using System.Collections;
36 public enum UnixDriveType {
46 // All methods & properties can throw IOException
47 public sealed class UnixDriveInfo
52 public UnixDriveInfo (string mountPoint)
54 if (mountPoint == null)
55 throw new ArgumentNullException ("mountPoint");
56 fstab = Syscall.getfsfile (mountPoint);
58 throw new ArgumentException ("mountPoint isn't valid: " + mountPoint);
59 // throws ArgumentException if driveName isn't valid
60 // though .NET also has a DriveNotFoundException class, so maybe that's
64 public static UnixDriveInfo GetForSpecialFile (string specialFile)
66 if (specialFile == null)
67 throw new ArgumentNullException ("specialFile");
68 Fstab f = Syscall.getfsspec (specialFile);
70 throw new ArgumentException ("specialFile isn't valid: " + specialFile);
71 return new UnixDriveInfo (f);
74 private UnixDriveInfo (Fstab fstab)
79 public long AvailableFreeSpace {
80 get {Refresh (); return (long) (stat.f_bavail * stat.f_bsize);}
83 public string DriveFormat {
84 get {return fstab.fs_vfstype;}
87 public UnixDriveType DriveType {
88 get {return UnixDriveType.Unknown;}
91 // this throws no exceptions
93 get {return Refresh (false);}
97 get {return fstab.fs_file;}
100 public UnixDirectoryInfo RootDirectory {
101 get {return new UnixDirectoryInfo (fstab.fs_file);}
104 public long TotalFreeSpace {
105 get {Refresh (); return (long) (stat.f_bfree * stat.f_bsize);}
108 public long TotalSize {
109 get {Refresh (); return (long) (stat.f_frsize * stat.f_blocks);}
112 // also throws SecurityException if caller lacks perms
113 public string VolumeLabel {
114 get {return fstab.fs_spec;}
118 public ulong MaximumFilenameLength {
119 get {Refresh (); return stat.f_namemax;}
122 public static UnixDriveInfo[] GetDrives ()
124 // throws IOException, UnauthorizedAccessException (no permission)
125 Syscall.SetLastError ((Error) 0);
126 int r = Syscall.setfsent ();
128 throw new IOException ("Error calling setfsent(3)");
129 ArrayList entries = new ArrayList ();
132 while ((fs = Syscall.getfsent()) != null) {
133 // avoid virtual entries, such as "swap"
134 if (fs.fs_file.StartsWith ("/"))
135 entries.Add (new UnixDriveInfo (fs));
141 return (UnixDriveInfo[]) entries.ToArray (typeof(UnixDriveInfo));
144 public override string ToString ()
149 private void Refresh ()
154 private bool Refresh (bool throwException)
156 int r = Syscall.statvfs (fstab.fs_file, out stat);
157 if (r == -1 && throwException) {
158 Error e = Syscall.GetLastError ();
159 throw new IOException (UnixMarshal.GetErrorDescription (e),
160 UnixMarshal.CreateExceptionForError (e));