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//------------------------------------------------------------------------------
//
// System.IO.CheckPermission.cs
//
// Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
//
// Author: Jim Richardson, develop@wtfo-guru.com
// Created: Saturday, August 25, 2001
//
// NOTE: All contributors can freely add to this class or make modifications
// that do not break existing usage of methods
//------------------------------------------------------------------------------
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Security;
using System.Security.Permissions;
namespace System.IO
{
/// <summary>
/// A utility class to assist with various permission validation in System.IO
/// </summary>
internal sealed class CheckPermission
{
/// <summary>
/// Generates and exception if caller doesn't have flags access to filesystem item specified by path
/// </summary>
[MonoTODO]
public static void Demand(FileIOPermissionAccess flags, string path)
{
FileIOPermission ioPerm = new FileIOPermission(flags, path);
// FIXME: FileIOPermission is not yet implemented
//ioPerm.Demand();
}
public static void Access(FileAccess access, string path)
{
switch(access)
{
case FileAccess.Read:
Demand(FileIOPermissionAccess.Read, path);
break;
case FileAccess.Write:
Demand(FileIOPermissionAccess.Write, path);
break;
case FileAccess.ReadWrite:
Demand(FileIOPermissionAccess.Read | FileIOPermissionAccess.Write, path);
break;
default:
// TODO: determine what best to do here
throw new ArgumentException("Invalid FileAccess parameter");
}
}
[MonoTODO]
public static void ModeAccess(FileMode mode, FileAccess access, string path, bool exists)
{
#if false
// TODO: this logic isn't entirely complete and accurate, yet
if((mode & (FileMode.CreateNew | FileMode.Create)) != 0)
{
CheckPermission.Demand(FileIOPermissionAccess.Write, Path.GetDirectoryName(path));
}
else if((mode & FileMode.OpenOrCreate) != 0)
{
if(!exists)
{
CheckPermission.Demand(FileIOPermissionAccess.Write, Path.GetDirectoryName(path));
}
else
{
CheckPermission.Access(access, path);
}
}
else if(exists)
{
CheckPermission.Access(access, path);
}
else
{
throw new FileNotFoundException();
}
#endif
}
}
} // namespace System.IO.Private
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