| public static GetDirectoryRoot ( string path ) : string | ||
| path | string | |
| return | string | |
public static string GetDirectoryRoot(string path) => MSIOD.GetDirectoryRoot(path);
private static SafeFileHandle OpenHandle(string fullPath, bool asDirectory)
{
string root = fullPath.Substring(0, PathInternal.GetRootLength(fullPath));
if (root == fullPath && root[1] == Path.VolumeSeparatorChar)
{
// intentionally not fullpath, most upstack public APIs expose this as path.
throw new ArgumentException(SR.Arg_PathIsVolume, "path");
}
SafeFileHandle handle = Interop.Kernel32.CreateFile(
fullPath,
Interop.Kernel32.GenericOperations.GENERIC_WRITE,
FileShare.ReadWrite | FileShare.Delete,
FileMode.Open,
asDirectory ? Interop.Kernel32.FileOperations.FILE_FLAG_BACKUP_SEMANTICS : 0);
if (handle.IsInvalid)
{
int errorCode = Marshal.GetLastWin32Error();
// NT5 oddity - when trying to open "C:\" as a File,
// we usually get ERROR_PATH_NOT_FOUND from the OS. We should
// probably be consistent w/ every other directory.
if (!asDirectory && errorCode == Interop.Errors.ERROR_PATH_NOT_FOUND && fullPath.Equals(Directory.GetDirectoryRoot(fullPath)))
{
errorCode = Interop.Errors.ERROR_ACCESS_DENIED;
}
throw Win32Marshal.GetExceptionForWin32Error(errorCode, fullPath);
}
return(handle);
}
private static SafeFileHandle OpenHandleToWriteAttributes(string fullPath, bool asDirectory)
{
if (fullPath.Length == PathInternal.GetRootLength(fullPath) && fullPath[1] == Path.VolumeSeparatorChar)
{
// intentionally not fullpath, most upstack public APIs expose this as path.
throw new ArgumentException(SR.Arg_PathIsVolume, "path");
}
int dwFlagsAndAttributes = Interop.Kernel32.FileOperations.FILE_FLAG_OPEN_REPARSE_POINT;
if (asDirectory)
{
dwFlagsAndAttributes |= Interop.Kernel32.FileOperations.FILE_FLAG_BACKUP_SEMANTICS;
}
SafeFileHandle handle = Interop.Kernel32.CreateFile(
fullPath,
Interop.Kernel32.FileOperations.FILE_WRITE_ATTRIBUTES,
FileShare.ReadWrite | FileShare.Delete,
FileMode.Open,
dwFlagsAndAttributes);
if (handle.IsInvalid)
{
int errorCode = Marshal.GetLastWin32Error();
// NT5 oddity - when trying to open "C:\" as a File,
// we usually get ERROR_PATH_NOT_FOUND from the OS. We should
// probably be consistent w/ every other directory.
if (!asDirectory && errorCode == Interop.Errors.ERROR_PATH_NOT_FOUND && fullPath.Equals(Directory.GetDirectoryRoot(fullPath)))
{
errorCode = Interop.Errors.ERROR_ACCESS_DENIED;
}
throw Win32Marshal.GetExceptionForWin32Error(errorCode, fullPath);
}
return(handle);
}
private static SafeFileHandle OpenHandle(string fullPath, bool asDirectory)
{
String root = fullPath.Substring(0, PathHelpers.GetRootLength(fullPath));
if (root == fullPath && root[1] == Path.VolumeSeparatorChar)
{
throw new ArgumentException(SR.Arg_PathIsVolume);
}
Interop.mincore.SECURITY_ATTRIBUTES secAttrs = default(Interop.mincore.SECURITY_ATTRIBUTES);
SafeFileHandle handle = Helpers.SafeCreateFile(
fullPath,
(int)Interop.mincore.GenericOperations.GENERIC_WRITE,
FileShare.ReadWrite | FileShare.Delete,
ref secAttrs,
FileMode.Open,
asDirectory ? (int)Interop.mincore.FileOperations.FILE_FLAG_BACKUP_SEMANTICS : (int)FileOptions.None,
IntPtr.Zero
);
if (handle.IsInvalid)
{
int errorCode = Marshal.GetLastWin32Error();
// NT5 oddity - when trying to open "C:\" as a File,
// we usually get ERROR_PATH_NOT_FOUND from the OS. We should
// probably be consistent w/ every other directory.
if (!asDirectory && errorCode == Interop.mincore.Errors.ERROR_PATH_NOT_FOUND && fullPath.Equals(Directory.GetDirectoryRoot(fullPath)))
{
errorCode = Interop.mincore.Errors.ERROR_ACCESS_DENIED;
}
throw Win32Marshal.GetExceptionForWin32Error(errorCode, fullPath);
}
return(handle);
}