/// <summary>
/// Mounts a dummy USB with the given gpii key.
/// </summary>
/// <param name="keyText"></param>
/// <returns>Drive letter.</returns>
internal string MountUsb(string keyText)
{
char[] drives = Environment.GetLogicalDrives().Select(d => d.ToUpperInvariant()[0]).ToArray();
if (drives.Length > 25)
{
this.Logger.Write("Too many drives mounted");
return(null);
}
// Pick an arbitrary drive letter that's unused.
int n = Environment.TickCount;
char ch;
do
{
ch = (char)('A' + (n++ % 26));
} while (drives.Contains(ch));
string letter = new string(ch, 1);
// Use a temporary directory for the content.
string dir = Path.Combine(Path.GetTempPath(), @"mdiag-usb\" + letter);
Directory.CreateDirectory(dir);
File.WriteAllText(Path.Combine(dir, ".gpii-user-token.txt"), keyText);
// Mount it
this.Logger.Command("subst " + letter + ": " + dir);
// Tell the system a new USB drive has been added (morphic listens to this)
FakeUsb.SendNotification(letter, true);
return(letter);
}
/// <summary>
/// Unmounts a dummy usb drive that was mounted via MountUsb.
/// </summary>
/// <param name="letter">The drive letter, returned by MountUsb</param>
internal void UnmountUsb(string letter)
{
// Unmount it
this.Logger.Command("subst /d " + letter + ":");
try
{
// Remove the temporary directory.
string dir = Path.Combine(Path.GetTempPath(), "mdiag-usb");
Directory.Delete(Path.Combine(dir, letter), true);
Directory.Delete(dir);
}
catch (IOException e)
{
// ignore
}
FakeUsb.SendNotification(letter, false);
}