DiskMonitor/NativeMethods.cs at main · Mainkill1/DiskMonitor · GitHub

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using System;
using System.Runtime.InteropServices;
using System.Text;

namespace IoMonitor
{
    /// <summary>
    /// Low-level Win32 interop for process I/O and token manipulation.
    /// </summary>
    internal static class NativeMethods
    {
        public const uint PROCESS_QUERY_INFORMATION = 0x0400;
        public const uint PROCESS_QUERY_LIMITED_INFORMATION = 0x1000;
        public const uint TOKEN_ADJUST_PRIVILEGES = 0x0020;
        public const uint TOKEN_QUERY = 0x0008;
        public const uint SE_PRIVILEGE_ENABLED = 0x00000002;

        [StructLayout(LayoutKind.Sequential)]
        public struct IO_COUNTERS
        {
            public ulong ReadOperationCount;
            public ulong WriteOperationCount;
            public ulong OtherOperationCount;
            public ulong ReadTransferCount;
            public ulong WriteTransferCount;
            public ulong OtherTransferCount;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct LUID
        {
            public uint LowPart;
            public int HighPart;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct LUID_AND_ATTRIBUTES
        {
            public LUID Luid;
            public uint Attributes;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct TOKEN_PRIVILEGES
        {
            public uint PrivilegeCount;

            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)]
            public LUID_AND_ATTRIBUTES[] Privileges;
        }

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern bool GetProcessIoCounters(IntPtr hProcess, out IO_COUNTERS counters);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern IntPtr OpenProcess(uint access, bool inheritHandle, int processId);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern bool CloseHandle(IntPtr handle);

        [DllImport("kernel32.dll", SetLastError = false)]
        public static extern IntPtr GetCurrentProcess();

        [DllImport("advapi32.dll", SetLastError = true)]
        public static extern bool OpenProcessToken(IntPtr processHandle, uint desiredAccess, out IntPtr tokenHandle);

        [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern bool LookupPrivilegeValue(string? systemName, string name, out LUID luid);

        [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        public static extern bool QueryFullProcessImageName(
            IntPtr hProcess,
            int dwFlags,
            StringBuilder lpExeName,
            ref int lpdwSize);


        [DllImport("advapi32.dll", SetLastError = true)]
        public static extern bool AdjustTokenPrivileges(
            IntPtr tokenHandle,
            bool disableAllPrivileges,
            ref TOKEN_PRIVILEGES newState,
            uint bufferLength,
            IntPtr previousState,
            IntPtr returnLength);
    }
}