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/*
KeePass Password Safe - The Open-Source Password Manager
Copyright (C) 2003-2024 Dominik Reichl <dominik.reichl@t-online.de>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Text;
using System.Xml;
namespace KeePassLib.Native
{
internal sealed class SimpleStat
{
private readonly object m_oPermissions;
private readonly long m_nUserId;
private readonly long m_nGroupId;
private SimpleStat(object oPermissions, long nUserId, long nGroupId)
{
if(oPermissions == null) throw new ArgumentNullException("oPermissions");
m_oPermissions = oPermissions;
m_nUserId = nUserId;
m_nGroupId = nGroupId;
}
public static SimpleStat Get(string strFilePath)
{
try
{
Type tUfsi, tUfi;
object oUfi = GetUnixFileInfo(strFilePath, out tUfsi, out tUfi);
if(oUfi == null) return null;
PropertyInfo piPerm = tUfsi.GetProperty("FileAccessPermissions",
BindingFlags.Public | BindingFlags.Instance);
if(piPerm == null) { Debug.Assert(false); return null; }
Debug.Assert(piPerm.PropertyType.IsEnum);
PropertyInfo piUser = tUfsi.GetProperty("OwnerUserId",
BindingFlags.Public | BindingFlags.Instance);
if(piUser == null) { Debug.Assert(false); return null; }
Debug.Assert(piUser.PropertyType == typeof(long));
PropertyInfo piGroup = tUfsi.GetProperty("OwnerGroupId",
BindingFlags.Public | BindingFlags.Instance);
if(piGroup == null) { Debug.Assert(false); return null; }
Debug.Assert(piGroup.PropertyType == typeof(long));
return new SimpleStat(piPerm.GetValue(oUfi, null),
(long)piUser.GetValue(oUfi, null),
(long)piGroup.GetValue(oUfi, null));
}
catch(Exception) { Debug.Assert(false); }
return null;
}
public static void Set(string strFilePath, SimpleStat s)
{
if(s == null) { Debug.Assert(false); return; }
try
{
Type tUfsi, tUfi;
object oUfi = GetUnixFileInfo(strFilePath, out tUfsi, out tUfi);
if(oUfi == null) return;
PropertyInfo piPerm = tUfsi.GetProperty("FileAccessPermissions",
BindingFlags.Public | BindingFlags.Instance);
if(piPerm == null) { Debug.Assert(false); return; }
piPerm.SetValue(oUfi, s.m_oPermissions, null);
MethodInfo miOwner = tUfsi.GetMethod("SetOwner",
new Type[] { typeof(long), typeof(long) });
if(miOwner == null) { Debug.Assert(false); return; }
miOwner.Invoke(oUfi, new object[] { s.m_nUserId, s.m_nGroupId });
}
catch(Exception) { Debug.Assert(false); }
}
private static bool GetTypes(out Type tUfsi, out Type tUfi)
{
tUfsi = null;
tUfi = null;
try
{
if(!NativeLib.IsUnix()) return false;
string strVer = typeof(XmlNode).Assembly.GetName().Version.ToString();
string strPosix = "Mono.Posix, Version=" + strVer;
Assembly asmPosix = Assembly.Load(strPosix);
if(asmPosix == null) { Debug.Assert(false); return false; }
tUfsi = asmPosix.GetType("Mono.Unix.UnixFileSystemInfo", false);
tUfi = asmPosix.GetType("Mono.Unix.UnixFileInfo", false);
bool b = ((tUfsi != null) && (tUfi != null));
Debug.Assert(b);
return b;
}
catch(Exception) { Debug.Assert(false); }
return false;
}
private static object GetUnixFileInfo(string strFilePath, Type tUfi)
{
if(string.IsNullOrEmpty(strFilePath)) { Debug.Assert(false); return null; }
try
{
if(!File.Exists(strFilePath)) { Debug.Assert(false); return null; }
return Activator.CreateInstance(tUfi, strFilePath);
}
catch(Exception) { Debug.Assert(false); }
return null;
}
private static object GetUnixFileInfo(string strFilePath,
out Type tUfsi, out Type tUfi)
{
if(!GetTypes(out tUfsi, out tUfi)) return null;
return GetUnixFileInfo(strFilePath, tUfi);
}
}
}
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