/*** FILESYSTEM OPERATION FUNCTIONS ***/
private void DoCreateDir()
{
bool failIfExists = false;
if (!string.IsNullOrEmpty(AdditionalArgs))
{
string[] args = AdditionalArgs.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var arg in args)
{
if (string.Equals(arg, "--failIfExists", StringComparison.OrdinalIgnoreCase))
{
failIfExists = true;
}
}
}
if (FileUtilities.DirectoryExistsNoFollow(PathAsString) || FileUtilities.FileExistsNoFollow(PathAsString))
{
if (failIfExists)
{
throw new InvalidOperationException($"Directory creation failed because '{PathAsString}' exists");
}
}
if (OperatingSystemHelper.IsUnixOS)
{
Directory.CreateDirectory(PathAsString);
}
else
{
// .NET's Directory.CreateDirectory first checks for directory existence, so when a directory
// exists it does nothing; to test a specific Detours access policy, we want to issue a "create directory"
// operation regardless of whether the directory exists, hence p-invoking Windows native CreateDirectory.
if (!ExternWinCreateDirectory(PathAsString, IntPtr.Zero))
{
int errorCode = Marshal.GetLastWin32Error();
// If we got ERROR_ALREADY_EXISTS (183), keep it quiet --- yes we did not 'write' but the directory
// is on the disk after this method returns --- and do not fail the operation.
if (errorCode == ERROR_ALREADY_EXISTS)
{
return;
}
throw new InvalidOperationException($"Directory creation (native) for path '{PathAsString}' failed with error {errorCode}.");
}
}
}
