[Mono-dev] Help needed with UnixDriveInfo

[Jonathan Pryor]

On Wed, 2006-05-24 at 10:56 +0200, Arnhoffer Károly wrote:
> I would like to try UnixDriveInfo but I can not know how to start. As
> I can see to construct a UnixDriveInfo object I have to give a mount
> point. How can I get the mount point part of a path? 

In general, you don't, since a mount point can be anywhere...

> For example I have a different partition (and different mount points)
> for / and an other for /home but my application may not know anything
> about it. My application gets the path /home/pulcsi/Documents and it
> has to deceide what the mount point here is to give it to
> UnixDriveInfo constructor. How should it do it?

Use UnixDriveInfo.GetDrives() to get all known mount points, then use
UnixDriveInfo.Name to determine which drive best corresponds to your
path:
        
        using System;
        using Mono.Unix;
        
        class Test {
          public static void Main (string[] paths)
          {
            UnixDriveInfo[] drives = UnixDriveInfo.GetDrives ();
        
            foreach (string path in paths) {
              int idx = -1, count = -1;
              for (int i = 0; i < drives.Length; ++i) {
                if (path.StartsWith (drives [i].Name) &&
                  drives [i].Name.Length > count) {
                  count = drives [i].Name.Length;
                  idx = i;
                }
              }
              Console.WriteLine ("Drive for `{0}' is {1} (device {2})",
                path, drives [idx].Name, drives [idx].VolumeLabel);
            }
          }
        }

 - Jon