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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using Microsoft.Build.Shared;
using Microsoft.Win32;
using Microsoft.Win32.SafeHandles;
using FILETIME = System.Runtime.InteropServices.ComTypes.FILETIME;
#nullable disable
namespace Microsoft.Build.Framework;
internal static class NativeMethods
{
#region Constants
internal const uint ERROR_INSUFFICIENT_BUFFER = 0x8007007A;
internal const uint STARTUP_LOADER_SAFEMODE = 0x10;
internal const uint S_OK = 0x0;
internal const uint S_FALSE = 0x1;
internal const uint ERROR_ACCESS_DENIED = 0x5;
internal const uint ERROR_FILE_NOT_FOUND = 0x80070002;
internal const uint FUSION_E_PRIVATE_ASM_DISALLOWED = 0x80131044; // Tried to find unsigned assembly in GAC
internal const uint RUNTIME_INFO_DONT_SHOW_ERROR_DIALOG = 0x40;
internal const uint FILE_TYPE_CHAR = 0x0002;
internal const Int32 STD_OUTPUT_HANDLE = -11;
internal const Int32 STD_ERROR_HANDLE = -12;
internal const uint ENABLE_VIRTUAL_TERMINAL_PROCESSING = 0x0004;
internal const uint RPC_S_CALLPENDING = 0x80010115;
internal const uint E_ABORT = (uint)0x80004004;
internal const int FILE_ATTRIBUTE_READONLY = 0x00000001;
internal const int FILE_ATTRIBUTE_DIRECTORY = 0x00000010;
internal const int FILE_ATTRIBUTE_REPARSE_POINT = 0x00000400;
/// <summary>
/// Default buffer size to use when dealing with the Windows API.
/// </summary>
internal const int MAX_PATH = 260;
private const string kernel32Dll = "kernel32.dll";
private const string WINDOWS_FILE_SYSTEM_REGISTRY_KEY = @"SYSTEM\CurrentControlSet\Control\FileSystem";
private const string WINDOWS_LONG_PATHS_ENABLED_VALUE_NAME = "LongPathsEnabled";
internal static DateTime MinFileDate { get; } = DateTime.FromFileTimeUtc(0);
internal static HandleRef NullHandleRef = new HandleRef(null, IntPtr.Zero);
internal static IntPtr NullIntPtr = new IntPtr(0);
internal static IntPtr InvalidHandle = new IntPtr(-1);
// As defined in winnt.h:
internal const ushort PROCESSOR_ARCHITECTURE_INTEL = 0;
internal const ushort PROCESSOR_ARCHITECTURE_ARM = 5;
internal const ushort PROCESSOR_ARCHITECTURE_IA64 = 6;
internal const ushort PROCESSOR_ARCHITECTURE_AMD64 = 9;
internal const ushort PROCESSOR_ARCHITECTURE_ARM64 = 12;
internal const uint INFINITE = 0xFFFFFFFF;
internal const uint WAIT_ABANDONED_0 = 0x00000080;
internal const uint WAIT_OBJECT_0 = 0x00000000;
internal const uint WAIT_TIMEOUT = 0x00000102;
#endregion
#region Enums
internal enum StreamHandleType
{
StdOut = STD_OUTPUT_HANDLE,
StdErr = STD_ERROR_HANDLE,
};
private enum PROCESSINFOCLASS : int
{
ProcessBasicInformation = 0,
ProcessQuotaLimits,
ProcessIoCounters,
ProcessVmCounters,
ProcessTimes,
ProcessBasePriority,
ProcessRaisePriority,
ProcessDebugPort,
ProcessExceptionPort,
ProcessAccessToken,
ProcessLdtInformation,
ProcessLdtSize,
ProcessDefaultHardErrorMode,
ProcessIoPortHandlers, // Note: this is kernel mode only
ProcessPooledUsageAndLimits,
ProcessWorkingSetWatch,
ProcessUserModeIOPL,
ProcessEnableAlignmentFaultFixup,
ProcessPriorityClass,
ProcessWx86Information,
ProcessHandleCount,
ProcessAffinityMask,
ProcessPriorityBoost,
MaxProcessInfoClass
};
private enum eDesiredAccess : int
{
DELETE = 0x00010000,
READ_CONTROL = 0x00020000,
WRITE_DAC = 0x00040000,
WRITE_OWNER = 0x00080000,
SYNCHRONIZE = 0x00100000,
STANDARD_RIGHTS_ALL = 0x001F0000,
PROCESS_TERMINATE = 0x0001,
PROCESS_CREATE_THREAD = 0x0002,
PROCESS_SET_SESSIONID = 0x0004,
PROCESS_VM_OPERATION = 0x0008,
PROCESS_VM_READ = 0x0010,
PROCESS_VM_WRITE = 0x0020,
PROCESS_DUP_HANDLE = 0x0040,
PROCESS_CREATE_PROCESS = 0x0080,
PROCESS_SET_QUOTA = 0x0100,
PROCESS_SET_INFORMATION = 0x0200,
PROCESS_QUERY_INFORMATION = 0x0400,
PROCESS_ALL_ACCESS = SYNCHRONIZE | 0xFFF
}
#pragma warning disable 0649, 0169
internal enum LOGICAL_PROCESSOR_RELATIONSHIP
{
RelationProcessorCore,
RelationNumaNode,
RelationCache,
RelationProcessorPackage,
RelationGroup,
RelationAll = 0xffff
}
internal struct SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX
{
public LOGICAL_PROCESSOR_RELATIONSHIP Relationship;
public uint Size;
public PROCESSOR_RELATIONSHIP Processor;
}
[StructLayout(LayoutKind.Sequential)]
internal unsafe struct PROCESSOR_RELATIONSHIP
{
public byte Flags;
private byte EfficiencyClass;
private fixed byte Reserved[20];
public ushort GroupCount;
public IntPtr GroupInfo;
}
#pragma warning restore 0169, 0149
/// <summary>
/// Flags for CoWaitForMultipleHandles
/// </summary>
[Flags]
public enum COWAIT_FLAGS : int
{
/// <summary>
/// Exit when a handle is signaled.
/// </summary>
COWAIT_NONE = 0,
/// <summary>
/// Exit when all handles are signaled AND a message is received.
/// </summary>
COWAIT_WAITALL = 0x00000001,
/// <summary>
/// Exit when an RPC call is serviced.
/// </summary>
COWAIT_ALERTABLE = 0x00000002
}
/// <summary>
/// Processor architecture values
/// </summary>
internal enum ProcessorArchitectures
{
// Intel 32 bit
X86,
// AMD64 64 bit
X64,
// Itanium 64
IA64,
// ARM
ARM,
// ARM64
ARM64,
// WebAssembly
WASM,
// S390x
S390X,
// LongAarch64
LOONGARCH64,
// 32-bit ARMv6
ARMV6,
// PowerPC 64-bit (little-endian)
PPC64LE,
// Who knows
Unknown
}
internal enum SymbolicLink
{
File = 0,
Directory = 1,
AllowUnprivilegedCreate = 2,
}
#endregion
#region Structs
/// <summary>
/// Structure that contain information about the system on which we are running
/// </summary>
[StructLayout(LayoutKind.Sequential)]
internal struct SYSTEM_INFO
{
// This is a union of a DWORD and a struct containing 2 WORDs.
internal ushort wProcessorArchitecture;
internal ushort wReserved;
internal uint dwPageSize;
internal IntPtr lpMinimumApplicationAddress;
internal IntPtr lpMaximumApplicationAddress;
internal IntPtr dwActiveProcessorMask;
internal uint dwNumberOfProcessors;
internal uint dwProcessorType;
internal uint dwAllocationGranularity;
internal ushort wProcessorLevel;
internal ushort wProcessorRevision;
}
/// <summary>
/// Wrap the intptr returned by OpenProcess in a safe handle.
/// </summary>
internal class SafeProcessHandle : SafeHandleZeroOrMinusOneIsInvalid
{
// Create a SafeHandle, informing the base class
// that this SafeHandle instance "owns" the handle,
// and therefore SafeHandle should call
// our ReleaseHandle method when the SafeHandle
// is no longer in use
private SafeProcessHandle() : base(true)
{
}
[SupportedOSPlatform("windows")]
protected override bool ReleaseHandle()
{
return CloseHandle(handle);
}
}
/// <summary>
/// Contains information about the current state of both physical and virtual memory, including extended memory
/// </summary>
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
internal class MemoryStatus
{
/// <summary>
/// Initializes a new instance of the <see cref="MemoryStatus"/> class.
/// </summary>
public MemoryStatus()
{
#if CLR2COMPATIBILITY
_length = (uint)Marshal.SizeOf(typeof(MemoryStatus));
#else
_length = (uint)Marshal.SizeOf<MemoryStatus>();
#endif
}
/// <summary>
/// Size of the structure, in bytes. You must set this member before calling GlobalMemoryStatusEx.
/// </summary>
private uint _length;
/// <summary>
/// Number between 0 and 100 that specifies the approximate percentage of physical
/// memory that is in use (0 indicates no memory use and 100 indicates full memory use).
/// </summary>
public uint MemoryLoad;
/// <summary>
/// Total size of physical memory, in bytes.
/// </summary>
public ulong TotalPhysical;
/// <summary>
/// Size of physical memory available, in bytes.
/// </summary>
public ulong AvailablePhysical;
/// <summary>
/// Size of the committed memory limit, in bytes. This is physical memory plus the
/// size of the page file, minus a small overhead.
/// </summary>
public ulong TotalPageFile;
/// <summary>
/// Size of available memory to commit, in bytes. The limit is ullTotalPageFile.
/// </summary>
public ulong AvailablePageFile;
/// <summary>
/// Total size of the user mode portion of the virtual address space of the calling process, in bytes.
/// </summary>
public ulong TotalVirtual;
/// <summary>
/// Size of unreserved and uncommitted memory in the user mode portion of the virtual
/// address space of the calling process, in bytes.
/// </summary>
public ulong AvailableVirtual;
/// <summary>
/// Size of unreserved and uncommitted memory in the extended portion of the virtual
/// address space of the calling process, in bytes.
/// </summary>
public ulong AvailableExtendedVirtual;
}
[StructLayout(LayoutKind.Sequential)]
private struct PROCESS_BASIC_INFORMATION
{
public uint ExitStatus;
public IntPtr PebBaseAddress;
public UIntPtr AffinityMask;
public int BasePriority;
public UIntPtr UniqueProcessId;
public UIntPtr InheritedFromUniqueProcessId;
public readonly uint Size
{
get
{
unsafe
{
return (uint)sizeof(PROCESS_BASIC_INFORMATION);
}
}
}
};
/// <summary>
/// Contains information about a file or directory; used by GetFileAttributesEx.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct WIN32_FILE_ATTRIBUTE_DATA
{
internal int fileAttributes;
internal uint ftCreationTimeLow;
internal uint ftCreationTimeHigh;
internal uint ftLastAccessTimeLow;
internal uint ftLastAccessTimeHigh;
internal uint ftLastWriteTimeLow;
internal uint ftLastWriteTimeHigh;
internal uint fileSizeHigh;
internal uint fileSizeLow;
}
/// <summary>
/// Contains the security descriptor for an object and specifies whether
/// the handle retrieved by specifying this structure is inheritable.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
internal class SecurityAttributes
{
public SecurityAttributes()
{
#if (CLR2COMPATIBILITY)
_nLength = (uint)Marshal.SizeOf(typeof(SecurityAttributes));
#else
_nLength = (uint)Marshal.SizeOf<SecurityAttributes>();
#endif
}
private uint _nLength;
public IntPtr lpSecurityDescriptor;
public bool bInheritHandle;
}
private class SystemInformationData
{
/// <summary>
/// Architecture as far as the current process is concerned.
/// It's x86 in wow64 (native architecture is x64 in that case).
/// Otherwise it's the same as the native architecture.
/// </summary>
public readonly ProcessorArchitectures ProcessorArchitectureType;
/// <summary>
/// Actual architecture of the system.
/// </summary>
public readonly ProcessorArchitectures ProcessorArchitectureTypeNative;
/// <summary>
/// Convert SYSTEM_INFO architecture values to the internal enum
/// </summary>
/// <param name="arch"></param>
/// <returns></returns>
private static ProcessorArchitectures ConvertSystemArchitecture(ushort arch)
{
return arch switch
{
PROCESSOR_ARCHITECTURE_INTEL => ProcessorArchitectures.X86,
PROCESSOR_ARCHITECTURE_AMD64 => ProcessorArchitectures.X64,
PROCESSOR_ARCHITECTURE_ARM => ProcessorArchitectures.ARM,
PROCESSOR_ARCHITECTURE_IA64 => ProcessorArchitectures.IA64,
PROCESSOR_ARCHITECTURE_ARM64 => ProcessorArchitectures.ARM64,
_ => ProcessorArchitectures.Unknown,
};
}
/// <summary>
/// Read system info values
/// </summary>
public SystemInformationData()
{
ProcessorArchitectureType = ProcessorArchitectures.Unknown;
ProcessorArchitectureTypeNative = ProcessorArchitectures.Unknown;
if (IsWindows)
{
var systemInfo = new SYSTEM_INFO();
GetSystemInfo(ref systemInfo);
ProcessorArchitectureType = ConvertSystemArchitecture(systemInfo.wProcessorArchitecture);
GetNativeSystemInfo(ref systemInfo);
ProcessorArchitectureTypeNative = ConvertSystemArchitecture(systemInfo.wProcessorArchitecture);
}
else
{
ProcessorArchitectures processorArchitecture = ProcessorArchitectures.Unknown;
#if NETCOREAPP || NETSTANDARD1_1_OR_GREATER
// Get the architecture from the runtime.
processorArchitecture = RuntimeInformation.OSArchitecture switch
{
Architecture.Arm => ProcessorArchitectures.ARM,
Architecture.Arm64 => ProcessorArchitectures.ARM64,
Architecture.X64 => ProcessorArchitectures.X64,
Architecture.X86 => ProcessorArchitectures.X86,
#if NET5_0_OR_GREATER
Architecture.Wasm => ProcessorArchitectures.WASM,
#endif
#if NET6_0_OR_GREATER
Architecture.S390x => ProcessorArchitectures.S390X,
#endif
#if NET7_0_OR_GREATER
Architecture.LoongArch64 => ProcessorArchitectures.LOONGARCH64,
Architecture.Armv6 => ProcessorArchitectures.ARMV6,
Architecture.Ppc64le => ProcessorArchitectures.PPC64LE,
#endif
_ => ProcessorArchitectures.Unknown,
};
#endif
ProcessorArchitectureTypeNative = ProcessorArchitectureType = processorArchitecture;
}
}
}
public static int GetLogicalCoreCount()
{
int numberOfCpus = Environment.ProcessorCount;
// .NET on Windows returns a core count limited to the current NUMA node
// https://github.com/dotnet/runtime/issues/29686
// so always double-check it.
if (IsWindows)
{
var result = GetLogicalCoreCountOnWindows();
if (result != -1)
{
numberOfCpus = result;
}
}
return numberOfCpus;
}
/// <summary>
/// Get the exact physical core count on Windows
/// Useful for getting the exact core count in 32 bits processes,
/// as Environment.ProcessorCount has a 32-core limit in that case.
/// https://github.com/dotnet/runtime/blob/221ad5b728f93489655df290c1ea52956ad8f51c/src/libraries/System.Runtime.Extensions/src/System/Environment.Windows.cs#L171-L210
/// </summary>
[SupportedOSPlatform("windows")]
private static unsafe int GetLogicalCoreCountOnWindows()
{
uint len = 0;
const int ERROR_INSUFFICIENT_BUFFER = 122;
if (!GetLogicalProcessorInformationEx(LOGICAL_PROCESSOR_RELATIONSHIP.RelationProcessorCore, IntPtr.Zero, ref len) &&
Marshal.GetLastWin32Error() == ERROR_INSUFFICIENT_BUFFER)
{
// Allocate that much space
var buffer = new byte[len];
fixed (byte* bufferPtr = buffer)
{
// Call GetLogicalProcessorInformationEx with the allocated buffer
if (GetLogicalProcessorInformationEx(LOGICAL_PROCESSOR_RELATIONSHIP.RelationProcessorCore, (IntPtr)bufferPtr, ref len))
{
// Walk each SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX in the buffer, where the Size of each dictates how
// much space it's consuming. For each group relation, count the number of active processors in each of its group infos.
int processorCount = 0;
byte* ptr = bufferPtr;
byte* endPtr = bufferPtr + len;
while (ptr < endPtr)
{
var current = (SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX*)ptr;
if (current->Relationship == LOGICAL_PROCESSOR_RELATIONSHIP.RelationProcessorCore)
{
// Flags is 0 if the core has a single logical proc, LTP_PC_SMT if more than one
// for now, assume "more than 1" == 2, as it has historically been for hyperthreading
processorCount += (current->Processor.Flags == 0) ? 1 : 2;
}
ptr += current->Size;
}
return processorCount;
}
}
}
return -1;
}
#endregion
#region Member data
internal static bool HasMaxPath => MaxPath == MAX_PATH;
/// <summary>
/// Gets the max path limit of the current OS.
/// </summary>
internal static int MaxPath
{
get
{
if (!IsMaxPathSet)
{
SetMaxPath();
}
return _maxPath;
}
}
/// <summary>
/// Cached value for MaxPath.
/// </summary>
private static int _maxPath;
private static bool IsMaxPathSet { get; set; }
private static readonly object MaxPathLock = new object();
private static void SetMaxPath()
{
lock (MaxPathLock)
{
if (!IsMaxPathSet)
{
bool isMaxPathRestricted = Traits.Instance.EscapeHatches.DisableLongPaths || IsMaxPathLegacyWindows();
_maxPath = isMaxPathRestricted ? MAX_PATH : int.MaxValue;
IsMaxPathSet = true;
}
}
}
internal static bool IsMaxPathLegacyWindows()
{
try
{
return IsWindows && !IsLongPathsEnabledRegistry();
}
catch
{
return true;
}
}
[SupportedOSPlatform("windows")]
private static bool IsLongPathsEnabledRegistry()
{
using (RegistryKey fileSystemKey = Registry.LocalMachine.OpenSubKey(WINDOWS_FILE_SYSTEM_REGISTRY_KEY))
{
object longPathsEnabledValue = fileSystemKey?.GetValue(WINDOWS_LONG_PATHS_ENABLED_VALUE_NAME, 0);
return fileSystemKey != null && Convert.ToInt32(longPathsEnabledValue) == 1;
}
}
/// <summary>
/// Cached value for IsUnixLike (this method is called frequently during evaluation).
/// </summary>
private static readonly bool s_isUnixLike = IsLinux || IsOSX || IsBSD;
/// <summary>
/// Gets a flag indicating if we are running under a Unix-like system (Mac, Linux, etc.)
/// </summary>
internal static bool IsUnixLike
{
get { return s_isUnixLike; }
}
/// <summary>
/// Gets a flag indicating if we are running under Linux
/// </summary>
[SupportedOSPlatformGuard("linux")]
internal static bool IsLinux
{
#if CLR2COMPATIBILITY
get { return false; }
#else
get { return RuntimeInformation.IsOSPlatform(OSPlatform.Linux); }
#endif
}
/// <summary>
/// Gets a flag indicating if we are running under flavor of BSD (NetBSD, OpenBSD, FreeBSD)
/// </summary>
internal static bool IsBSD
{
#if CLR2COMPATIBILITY
get { return false; }
#else
get
{
return RuntimeInformation.IsOSPlatform(OSPlatform.Create("FREEBSD")) ||
RuntimeInformation.IsOSPlatform(OSPlatform.Create("NETBSD")) ||
RuntimeInformation.IsOSPlatform(OSPlatform.Create("OPENBSD"));
}
#endif
}
#if !CLR2COMPATIBILITY
private static bool? _isWindows;
#endif
/// <summary>
/// Gets a flag indicating if we are running under some version of Windows
/// </summary>
[SupportedOSPlatformGuard("windows")]
internal static bool IsWindows
{
#if CLR2COMPATIBILITY
get { return true; }
#else
get
{
_isWindows ??= RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
return _isWindows.Value;
}
#endif
}
#if !CLR2COMPATIBILITY
private static bool? _isOSX;
#endif
/// <summary>
/// Gets a flag indicating if we are running under Mac OSX
/// </summary>
internal static bool IsOSX
{
#if CLR2COMPATIBILITY
get { return false; }
#else
get
{
_isOSX ??= RuntimeInformation.IsOSPlatform(OSPlatform.OSX);
return _isOSX.Value;
}
#endif
}
/// <summary>
/// Gets a string for the current OS. This matches the OS env variable
/// for Windows (Windows_NT).
/// </summary>
internal static string OSName
{
get { return IsWindows ? "Windows_NT" : "Unix"; }
}
/// <summary>
/// Framework named as presented to users (for example in version info).
/// </summary>
internal static string FrameworkName
{
get
{
#if RUNTIME_TYPE_NETCORE
const string frameworkName = ".NET";
#else
const string frameworkName = ".NET Framework";
#endif
return frameworkName;
}
}
/// <summary>
/// OS name that can be used for the msbuildExtensionsPathSearchPaths element
/// for a toolset
/// </summary>
internal static string GetOSNameForExtensionsPath()
{
return IsOSX ? "osx" : IsUnixLike ? "unix" : "windows";
}
internal static bool OSUsesCaseSensitivePaths
{
get { return IsLinux; }
}
/// <summary>
/// The base directory for all framework paths in Mono
/// </summary>
private static string s_frameworkBasePath;
/// <summary>
/// The directory of the current framework
/// </summary>
private static string s_frameworkCurrentPath;
/// <summary>
/// Gets the currently running framework path
/// </summary>
internal static string FrameworkCurrentPath
{
get
{
if (s_frameworkCurrentPath == null)
{
var baseTypeLocation = AssemblyUtilities.GetAssemblyLocation(typeof(string).GetTypeInfo().Assembly);
s_frameworkCurrentPath =
Path.GetDirectoryName(baseTypeLocation)
?? string.Empty;
}
return s_frameworkCurrentPath;
}
}
/// <summary>
/// Gets the base directory of all Mono frameworks
/// </summary>
internal static string FrameworkBasePath
{
get
{
if (s_frameworkBasePath == null)
{
var dir = FrameworkCurrentPath;
if (dir != string.Empty)
{
dir = Path.GetDirectoryName(dir);
}
s_frameworkBasePath = dir ?? string.Empty;
}
return s_frameworkBasePath;
}
}
/// <summary>
/// System information, initialized when required.
/// </summary>
/// <remarks>
/// Initially implemented as <see cref="Lazy{SystemInformationData}"/>, but
/// that's .NET 4+, and this is used in MSBuildTaskHost.
/// </remarks>
private static SystemInformationData SystemInformation
{
get
{
if (!_systemInformationInitialized)
{
lock (SystemInformationLock)
{
if (!_systemInformationInitialized)
{
_systemInformation = new SystemInformationData();
_systemInformationInitialized = true;
}
}
}
return _systemInformation;
}
}
private static SystemInformationData _systemInformation;
private static bool _systemInformationInitialized;
private static readonly object SystemInformationLock = new object();
/// <summary>
/// Architecture getter
/// </summary>
internal static ProcessorArchitectures ProcessorArchitecture => SystemInformation.ProcessorArchitectureType;
/// <summary>
/// Native architecture getter
/// </summary>
internal static ProcessorArchitectures ProcessorArchitectureNative => SystemInformation.ProcessorArchitectureTypeNative;
#endregion
#region Wrapper methods
[DllImport("kernel32.dll", SetLastError = true)]
[SupportedOSPlatform("windows")]
internal static extern void GetSystemInfo(ref SYSTEM_INFO lpSystemInfo);
[DllImport("kernel32.dll", SetLastError = true)]
[SupportedOSPlatform("windows")]
internal static extern void GetNativeSystemInfo(ref SYSTEM_INFO lpSystemInfo);
[DllImport("kernel32.dll", SetLastError = true)]
[SupportedOSPlatform("windows")]
internal static extern bool GetLogicalProcessorInformationEx(LOGICAL_PROCESSOR_RELATIONSHIP RelationshipType, IntPtr Buffer, ref uint ReturnedLength);
/// <summary>
/// Get the last write time of the fullpath to a directory. If the pointed path is not a directory, or
/// if the directory does not exist, then false is returned and fileModifiedTimeUtc is set DateTime.MinValue.
/// </summary>
/// <param name="fullPath">Full path to the file in the filesystem</param>
/// <param name="fileModifiedTimeUtc">The UTC last write time for the directory</param>
internal static bool GetLastWriteDirectoryUtcTime(string fullPath, out DateTime fileModifiedTimeUtc)
{
// This code was copied from the reference manager, if there is a bug fix in that code, see if the same fix should also be made
// there
if (IsWindows)
{
fileModifiedTimeUtc = DateTime.MinValue;
WIN32_FILE_ATTRIBUTE_DATA data = new WIN32_FILE_ATTRIBUTE_DATA();
bool success = GetFileAttributesEx(fullPath, 0, ref data);
if (success)
{
if ((data.fileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0)
{
long dt = ((long)(data.ftLastWriteTimeHigh) << 32) | ((long)data.ftLastWriteTimeLow);
fileModifiedTimeUtc = DateTime.FromFileTimeUtc(dt);
}
else
{
// Path does not point to a directory
success = false;
}
}
return success;
}
if (Directory.Exists(fullPath))
{
fileModifiedTimeUtc = Directory.GetLastWriteTimeUtc(fullPath);
return true;
}
else
{
fileModifiedTimeUtc = DateTime.MinValue;
return false;
}
}
/// <summary>
/// Takes the path and returns the short path
/// </summary>
internal static string GetShortFilePath(string path)
{
if (!IsWindows)
{
return path;
}
if (path != null)
{
int length = GetShortPathName(path, null, 0);
int errorCode = Marshal.GetLastWin32Error();
if (length > 0)
{
char[] fullPathBuffer = new char[length];
length = GetShortPathName(path, fullPathBuffer, length);
errorCode = Marshal.GetLastWin32Error();
if (length > 0)
{
string fullPath = new(fullPathBuffer, 0, length);
path = fullPath;
}
}
if (length == 0 && errorCode != 0)
{
ThrowExceptionForErrorCode(errorCode);
}
}
return path;
}
/// <summary>
/// Takes the path and returns a full path
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
[SupportedOSPlatform("windows")]
internal static string GetLongFilePath(string path)
{
if (IsUnixLike)
{
return path;
}
if (path != null)
{
int length = GetLongPathName(path, null, 0);
int errorCode = Marshal.GetLastWin32Error();
if (length > 0)
{
char[] fullPathBuffer = new char[length];
length = GetLongPathName(path, fullPathBuffer, length);
errorCode = Marshal.GetLastWin32Error();
if (length > 0)
{
string fullPath = new(fullPathBuffer, 0, length);
path = fullPath;
}
}
if (length == 0 && errorCode != 0)
{
ThrowExceptionForErrorCode(errorCode);
}
}
return path;
}
/// <summary>
/// Retrieves the current global memory status.
/// </summary>
internal static MemoryStatus GetMemoryStatus()
{
if (IsWindows)
{
MemoryStatus status = new MemoryStatus();
bool returnValue = GlobalMemoryStatusEx(status);
if (!returnValue)
{
return null;
}
return status;
}
return null;
}
internal static bool MakeSymbolicLink(string newFileName, string existingFileName, ref string errorMessage)
{
bool symbolicLinkCreated;
if (IsWindows)
{
Version osVersion = Environment.OSVersion.Version;
SymbolicLink flags = SymbolicLink.File;
if (osVersion.Major >= 11 || (osVersion.Major == 10 && osVersion.Build >= 14972))
{
flags |= SymbolicLink.AllowUnprivilegedCreate;
}
symbolicLinkCreated = CreateSymbolicLink(newFileName, existingFileName, flags);
errorMessage = symbolicLinkCreated ? null : Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error()).Message;
}
else
{
symbolicLinkCreated = symlink(existingFileName, newFileName) == 0;
errorMessage = symbolicLinkCreated ? null : Marshal.GetLastWin32Error().ToString();
}
return symbolicLinkCreated;
}
/// <summary>
/// Get the last write time of the fullpath to the file.
/// </summary>
/// <param name="fullPath">Full path to the file in the filesystem</param>
/// <returns>The last write time of the file, or DateTime.MinValue if the file does not exist.</returns>
/// <remarks>
/// This method should be accurate for regular files and symlinks, but can report incorrect data
/// if the file's content was modified by writing to it through a different link, unless
/// MSBUILDALWAYSCHECKCONTENTTIMESTAMP=1.
/// </remarks>
internal static DateTime GetLastWriteFileUtcTime(string fullPath)
{
#if !CLR2COMPATIBILITY && !MICROSOFT_BUILD_ENGINE_OM_UNITTESTS
if (Traits.Instance.EscapeHatches.AlwaysDoImmutableFilesUpToDateCheck)
{
return LastWriteFileUtcTime(fullPath);
}
bool isNonModifiable = FileClassifier.Shared.IsNonModifiable(fullPath);
if (isNonModifiable)
{
if (ImmutableFilesTimestampCache.Shared.TryGetValue(fullPath, out DateTime modifiedAt))
{
return modifiedAt;
}
}
DateTime modifiedTime = LastWriteFileUtcTime(fullPath);
if (isNonModifiable && modifiedTime != DateTime.MinValue)
{
ImmutableFilesTimestampCache.Shared.TryAdd(fullPath, modifiedTime);
}
return modifiedTime;
#else
return LastWriteFileUtcTime(fullPath);
#endif
DateTime LastWriteFileUtcTime(string path)
{
DateTime fileModifiedTime = DateTime.MinValue;
if (IsWindows)
{
if (Traits.Instance.EscapeHatches.AlwaysUseContentTimestamp)
{
return GetContentLastWriteFileUtcTime(path);
}
WIN32_FILE_ATTRIBUTE_DATA data = new WIN32_FILE_ATTRIBUTE_DATA();
bool success = NativeMethods.GetFileAttributesEx(path, 0, ref data);
if (success && (data.fileAttributes & NativeMethods.FILE_ATTRIBUTE_DIRECTORY) == 0)
{
long dt = ((long)(data.ftLastWriteTimeHigh) << 32) | ((long)data.ftLastWriteTimeLow);
fileModifiedTime = DateTime.FromFileTimeUtc(dt);
// If file is a symlink _and_ we're not instructed to do the wrong thing, get a more accurate timestamp.
if ((data.fileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) == FILE_ATTRIBUTE_REPARSE_POINT && !Traits.Instance.EscapeHatches.UseSymlinkTimeInsteadOfTargetTime)
{
fileModifiedTime = GetContentLastWriteFileUtcTime(path);
}
}
return fileModifiedTime;
}
else
{
return File.Exists(path)
? File.GetLastWriteTimeUtc(path)
: DateTime.MinValue;
}
}
}
/// <summary>
/// Get the SafeFileHandle for a file, while skipping reparse points (going directly to target file).
/// </summary>
/// <param name="fullPath">Full path to the file in the filesystem</param>
/// <returns>the SafeFileHandle for a file (target file in case of symlinks)</returns>
[SupportedOSPlatform("windows")]
private static SafeFileHandle OpenFileThroughSymlinks(string fullPath)
{
return CreateFile(fullPath,
GENERIC_READ,
FILE_SHARE_READ,
IntPtr.Zero,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, /* No FILE_FLAG_OPEN_REPARSE_POINT; read through to content */
IntPtr.Zero);
}
/// <summary>
/// Get the last write time of the content pointed to by a file path.
/// </summary>
/// <param name="fullPath">Full path to the file in the filesystem</param>
/// <returns>The last write time of the file, or DateTime.MinValue if the file does not exist.</returns>
/// <remarks>
/// This is the most accurate timestamp-extraction mechanism, but it is too slow to use all the time.
/// See https://github.com/dotnet/msbuild/issues/2052.
/// </remarks>
[SupportedOSPlatform("windows")]
private static DateTime GetContentLastWriteFileUtcTime(string fullPath)
{
DateTime fileModifiedTime = DateTime.MinValue;
using (SafeFileHandle handle = OpenFileThroughSymlinks(fullPath))
{
if (!handle.IsInvalid)
{
FILETIME ftCreationTime, ftLastAccessTime, ftLastWriteTime;
if (GetFileTime(handle, out ftCreationTime, out ftLastAccessTime, out ftLastWriteTime))
{
long fileTime = ((long)(uint)ftLastWriteTime.dwHighDateTime) << 32 |
(long)(uint)ftLastWriteTime.dwLowDateTime;
fileModifiedTime =
DateTime.FromFileTimeUtc(fileTime);
}
}
}
return fileModifiedTime;
}
/// <summary>
/// Did the HRESULT succeed
/// </summary>
public static bool HResultSucceeded(int hr)
{
return hr >= 0;
}
/// <summary>
/// Did the HRESULT Fail
/// </summary>
public static bool HResultFailed(int hr)
{
return hr < 0;
}
/// <summary>
/// Given an error code, converts it to an HRESULT and throws the appropriate exception.
/// </summary>
/// <param name="errorCode"></param>
public static void ThrowExceptionForErrorCode(int errorCode)
{
// See ndp\clr\src\bcl\system\io\__error.cs for this code as it appears in the CLR.
// Something really bad went wrong with the call
// translate the error into an exception
// Convert the errorcode into an HRESULT (See MakeHRFromErrorCode in Win32Native.cs in
// ndp\clr\src\bcl\microsoft\win32)
errorCode = unchecked(((int)0x80070000) | errorCode);
// Throw an exception as best we can
Marshal.ThrowExceptionForHR(errorCode);
}
/// <summary>
/// Kills the specified process by id and all of its children recursively.
/// </summary>
[SupportedOSPlatform("windows")]
internal static void KillTree(int processIdToKill)
{
// Note that GetProcessById does *NOT* internally hold on to the process handle.
// Only when you create the process using the Process object
// does the Process object retain the original handle.
Process thisProcess;
try
{
thisProcess = Process.GetProcessById(processIdToKill);
}
catch (ArgumentException)
{
// The process has already died for some reason. So shrug and assume that any child processes
// have all also either died or are in the process of doing so.
return;
}
try
{
DateTime myStartTime = thisProcess.StartTime;
// Grab the process handle. We want to keep this open for the duration of the function so that
// it cannot be reused while we are running.
using (SafeProcessHandle hProcess = OpenProcess(eDesiredAccess.PROCESS_QUERY_INFORMATION, false, processIdToKill))
{
if (hProcess.IsInvalid)
{
return;
}
try
{
// Kill this process, so that no further children can be created.
thisProcess.Kill();
}
catch (Win32Exception e) when (e.NativeErrorCode == ERROR_ACCESS_DENIED)
{
// Access denied is potentially expected -- it happens when the process that
// we're attempting to kill is already dead. So just ignore in that case.
}
// Now enumerate our children. Children of this process are any process which has this process id as its parent
// and which also started after this process did.
List<KeyValuePair<int, SafeProcessHandle>> children = GetChildProcessIds(processIdToKill, myStartTime);
try
{
foreach (KeyValuePair<int, SafeProcessHandle> childProcessInfo in children)
{
KillTree(childProcessInfo.Key);
}
}
finally
{
foreach (KeyValuePair<int, SafeProcessHandle> childProcessInfo in children)
{
childProcessInfo.Value.Dispose();
}
}
}
}
finally
{
thisProcess.Dispose();
}
}
/// <summary>
/// Returns the parent process id for the specified process.
/// Returns zero if it cannot be gotten for some reason.
/// </summary>
[SupportedOSPlatform("windows")]
internal static int GetParentProcessId(int processId)
{
int ParentID = 0;
#if !CLR2COMPATIBILITY
if (IsUnixLike)
{
string line = null;
try
{
// /proc/<processID>/stat returns a bunch of space separated fields. Get that string
// TODO: this was
// using (var r = FileUtilities.OpenRead("/proc/" + processId + "/stat"))
// and could be again when FileUtilities moves to Framework
using var fileStream = new FileStream("/proc/" + processId + "/stat", FileMode.Open, System.IO.FileAccess.Read);
using StreamReader r = new(fileStream);
line = r.ReadLine();
}
catch // Ignore errors since the process may have terminated
{
}
if (!string.IsNullOrWhiteSpace(line))
{
// One of the fields is the process name. It may contain any characters, but since it's
// in parenthesis, we can finds its end by looking for the last parenthesis. After that,
// there comes a space, then the second fields separated by a space is the parent id.
string[] statFields = line.Substring(line.LastIndexOf(')')).Split(MSBuildConstants.SpaceChar, 4);
if (statFields.Length >= 3)
{
ParentID = Int32.Parse(statFields[2]);
}
}
}
else
#endif
{
using SafeProcessHandle hProcess = OpenProcess(eDesiredAccess.PROCESS_QUERY_INFORMATION, false, processId);
{
if (!hProcess.IsInvalid)
{
// UNDONE: NtQueryInformationProcess will fail if we are not elevated and other process is. Advice is to change to use ToolHelp32 API's
// For now just return zero and worst case we will not kill some children.
PROCESS_BASIC_INFORMATION pbi = new PROCESS_BASIC_INFORMATION();
int pSize = 0;
if (0 == NtQueryInformationProcess(hProcess, PROCESSINFOCLASS.ProcessBasicInformation, ref pbi, pbi.Size, ref pSize))
{
ParentID = (int)pbi.InheritedFromUniqueProcessId;
}
}
}
}
return ParentID;
}
/// <summary>
/// Returns an array of all the immediate child processes by id.
/// NOTE: The IntPtr in the tuple is the handle of the child process. CloseHandle MUST be called on this.
/// </summary>
[SupportedOSPlatform("windows")]
internal static List<KeyValuePair<int, SafeProcessHandle>> GetChildProcessIds(int parentProcessId, DateTime parentStartTime)
{
List<KeyValuePair<int, SafeProcessHandle>> myChildren = new List<KeyValuePair<int, SafeProcessHandle>>();
foreach (Process possibleChildProcess in Process.GetProcesses())
{
using (possibleChildProcess)
{
// Hold the child process handle open so that children cannot die and restart with a different parent after we've started looking at it.
// This way, any handle we pass back is guaranteed to be one of our actual children.
#pragma warning disable CA2000 // Dispose objects before losing scope - caller must dispose returned handles
SafeProcessHandle childHandle = OpenProcess(eDesiredAccess.PROCESS_QUERY_INFORMATION, false, possibleChildProcess.Id);
#pragma warning restore CA2000 // Dispose objects before losing scope
{
if (childHandle.IsInvalid)
{
continue;
}
bool keepHandle = false;
try
{
if (possibleChildProcess.StartTime > parentStartTime)
{
int childParentProcessId = GetParentProcessId(possibleChildProcess.Id);
if (childParentProcessId != 0)
{
if (parentProcessId == childParentProcessId)
{
// Add this one
myChildren.Add(new KeyValuePair<int, SafeProcessHandle>(possibleChildProcess.Id, childHandle));
keepHandle = true;
}
}
}
}
finally
{
if (!keepHandle)
{
childHandle.Dispose();
}
}
}
}
}
return myChildren;
}
/// <summary>
/// Internal, optimized GetCurrentDirectory implementation that simply delegates to the native method
/// </summary>
/// <returns></returns>
internal static unsafe string GetCurrentDirectory()
{
#if FEATURE_LEGACY_GETCURRENTDIRECTORY
if (IsWindows)
{
int bufferSize = GetCurrentDirectoryWin32(0, null);
char* buffer = stackalloc char[bufferSize];
int pathLength = GetCurrentDirectoryWin32(bufferSize, buffer);
return new string(buffer, startIndex: 0, length: pathLength);
}
#endif
return Directory.GetCurrentDirectory();
}
[SupportedOSPlatform("windows")]
private static unsafe int GetCurrentDirectoryWin32(int nBufferLength, char* lpBuffer)
{
int pathLength = GetCurrentDirectory(nBufferLength, lpBuffer);
VerifyThrowWin32Result(pathLength);
return pathLength;
}
[SupportedOSPlatform("windows")]
internal static unsafe string GetFullPath(string path)
{
int bufferSize = GetFullPathWin32(path, 0, null, IntPtr.Zero);
char* buffer = stackalloc char[bufferSize];
int fullPathLength = GetFullPathWin32(path, bufferSize, buffer, IntPtr.Zero);
// Avoid creating new strings unnecessarily
return AreStringsEqual(buffer, fullPathLength, path) ? path : new string(buffer, startIndex: 0, length: fullPathLength);
}
[SupportedOSPlatform("windows")]
private static unsafe int GetFullPathWin32(string target, int bufferLength, char* buffer, IntPtr mustBeZero)
{
int pathLength = GetFullPathName(target, bufferLength, buffer, mustBeZero);
VerifyThrowWin32Result(pathLength);
return pathLength;
}
/// <summary>
/// Compare an unsafe char buffer with a <see cref="System.String"/> to see if their contents are identical.
/// </summary>
/// <param name="buffer">The beginning of the char buffer.</param>
/// <param name="len">The length of the buffer.</param>
/// <param name="s">The string.</param>
/// <returns>True only if the contents of <paramref name="s"/> and the first <paramref name="len"/> characters in <paramref name="buffer"/> are identical.</returns>
private static unsafe bool AreStringsEqual(char* buffer, int len, string s)
{
if (len != s.Length)
{
return false;
}
foreach (char ch in s)
{
if (ch != *buffer++)
{
return false;
}
}
return true;
}
internal static void VerifyThrowWin32Result(int result)
{
bool isError = result == 0;
if (isError)
{
int code = Marshal.GetLastWin32Error();
ThrowExceptionForErrorCode(code);
}
}
#if !CLR2COMPATIBILITY
internal static (bool acceptAnsiColorCodes, bool outputIsScreen, uint? originalConsoleMode) QueryIsScreenAndTryEnableAnsiColorCodes(StreamHandleType handleType = StreamHandleType.StdOut)
{
if (Console.IsOutputRedirected)
{
// There's no ANSI terminal support if console output is redirected.
return (acceptAnsiColorCodes: false, outputIsScreen: false, originalConsoleMode: null);
}
bool acceptAnsiColorCodes = false;
bool outputIsScreen = false;
uint? originalConsoleMode = null;
if (IsWindows)
{
try
{
IntPtr outputStream = GetStdHandle((int)handleType);
if (GetConsoleMode(outputStream, out uint consoleMode))
{
if ((consoleMode & ENABLE_VIRTUAL_TERMINAL_PROCESSING) == ENABLE_VIRTUAL_TERMINAL_PROCESSING)
{
// Console is already in required state.
acceptAnsiColorCodes = true;
}
else
{
originalConsoleMode = consoleMode;
consoleMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
if (SetConsoleMode(outputStream, consoleMode) && GetConsoleMode(outputStream, out consoleMode))
{
// We only know if vt100 is supported if the previous call actually set the new flag, older
// systems ignore the setting.
acceptAnsiColorCodes = (consoleMode & ENABLE_VIRTUAL_TERMINAL_PROCESSING) == ENABLE_VIRTUAL_TERMINAL_PROCESSING;
}
}
uint fileType = GetFileType(outputStream);
// The std out is a char type (LPT or Console).
outputIsScreen = fileType == FILE_TYPE_CHAR;
acceptAnsiColorCodes &= outputIsScreen;
}
}
catch
{
// In the unlikely case that the above fails we just ignore and continue.
}
}
else
{
// On posix OSes we expect console always supports VT100 coloring unless it is explicitly marked as "dumb".
acceptAnsiColorCodes = Environment.GetEnvironmentVariable("TERM") != "dumb";
// It wasn't redirected as tested above so we assume output is screen/console
outputIsScreen = true;
}
return (acceptAnsiColorCodes, outputIsScreen, originalConsoleMode);
}
internal static void RestoreConsoleMode(uint? originalConsoleMode, StreamHandleType handleType = StreamHandleType.StdOut)
{
if (IsWindows && originalConsoleMode is not null)
{
IntPtr stdOut = GetStdHandle((int)handleType);
_ = SetConsoleMode(stdOut, originalConsoleMode.Value);
}
}
#endif // !CLR2COMPATIBILITY
#endregion
#region PInvoke
[SupportedOSPlatform("linux")]
[DllImport("libc", SetLastError = true)]
internal static extern int chmod(string pathname, int mode);
[SupportedOSPlatform("linux")]
[DllImport("libc", SetLastError = true)]
internal static extern int mkdir(string path, int mode);
/// <summary>
/// Gets the current OEM code page which is used by console apps
/// (as opposed to the Windows/ANSI code page)
/// Basically for each ANSI code page (set in Regional settings) there's a corresponding OEM code page
/// that needs to be used for instance when writing to batch files
/// </summary>
[DllImport(kernel32Dll)]
[SupportedOSPlatform("windows")]
internal static extern int GetOEMCP();
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
[return: MarshalAs(UnmanagedType.Bool)]
[SupportedOSPlatform("windows")]
internal static extern bool GetFileAttributesEx(String name, int fileInfoLevel, ref WIN32_FILE_ATTRIBUTE_DATA lpFileInformation);
[DllImport("kernel32.dll", PreserveSig = true, SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
[SupportedOSPlatform("windows")]
internal static extern bool FreeLibrary([In] IntPtr module);
[DllImport("kernel32.dll", PreserveSig = true, BestFitMapping = false, ThrowOnUnmappableChar = true, CharSet = CharSet.Ansi, SetLastError = true)]
[SupportedOSPlatform("windows")]
internal static extern IntPtr GetProcAddress(IntPtr module, string procName);
[DllImport("kernel32.dll", CharSet = CharSet.Unicode, PreserveSig = true, SetLastError = true)]
[SupportedOSPlatform("windows")]
internal static extern IntPtr LoadLibrary(string fileName);
/// <summary>
/// Gets the fully qualified filename of the currently executing .exe.
/// </summary>
/// <param name="hModule"><see cref="HandleRef"/> of the module for which we are finding the file name.</param>
/// <param name="buffer">The character buffer used to return the file name.</param>
/// <param name="length">The length of the buffer.</param>
[DllImport(kernel32Dll, SetLastError = true, CharSet = CharSet.Unicode)]
[SupportedOSPlatform("windows")]
internal static extern int GetModuleFileName(HandleRef hModule, [Out] char[] buffer, int length);
[DllImport("kernel32.dll")]
[SupportedOSPlatform("windows")]
internal static extern IntPtr GetStdHandle(int nStdHandle);
[DllImport("kernel32.dll")]
[SupportedOSPlatform("windows")]
internal static extern uint GetFileType(IntPtr hFile);
[DllImport("kernel32.dll")]
internal static extern bool GetConsoleMode(IntPtr hConsoleHandle, out uint lpMode);
[DllImport("kernel32.dll")]
internal static extern bool SetConsoleMode(IntPtr hConsoleHandle, uint dwMode);
[SuppressMessage("Microsoft.Usage", "CA2205:UseManagedEquivalentsOfWin32Api", Justification = "Using unmanaged equivalent for performance reasons")]
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
[SupportedOSPlatform("windows")]
internal static extern unsafe int GetCurrentDirectory(int nBufferLength, char* lpBuffer);
[SuppressMessage("Microsoft.Usage", "CA2205:UseManagedEquivalentsOfWin32Api", Justification = "Using unmanaged equivalent for performance reasons")]
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode, EntryPoint = "SetCurrentDirectory")]
[return: MarshalAs(UnmanagedType.Bool)]
[SupportedOSPlatform("windows")]
internal static extern bool SetCurrentDirectoryWindows(string path);
internal static bool SetCurrentDirectory(string path)
{
if (IsWindows)
{
return SetCurrentDirectoryWindows(path);
}
// Make sure this does not throw
try
{
Directory.SetCurrentDirectory(path);
}
catch
{
}
return true;
}
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
[SupportedOSPlatform("windows")]
internal static extern unsafe int GetFullPathName(string target, int bufferLength, char* buffer, IntPtr mustBeZero);
[DllImport("KERNEL32.DLL")]
[SupportedOSPlatform("windows")]
private static extern SafeProcessHandle OpenProcess(eDesiredAccess dwDesiredAccess, [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle, int dwProcessId);
[DllImport("NTDLL.DLL")]
[SupportedOSPlatform("windows")]
private static extern int NtQueryInformationProcess(SafeProcessHandle hProcess, PROCESSINFOCLASS pic, ref PROCESS_BASIC_INFORMATION pbi, uint cb, ref int pSize);
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
[SupportedOSPlatform("windows")]
private static extern bool GlobalMemoryStatusEx([In, Out] MemoryStatus lpBuffer);
[DllImport("kernel32.dll", CharSet = CharSet.Unicode, BestFitMapping = false)]
[SupportedOSPlatform("windows")]
internal static extern int GetShortPathName(string path, [Out] char[] fullpath, [In] int length);
[DllImport("kernel32.dll", CharSet = CharSet.Unicode, BestFitMapping = false)]
[SupportedOSPlatform("windows")]
internal static extern int GetLongPathName([In] string path, [Out] char[] fullpath, [In] int length);
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
[SupportedOSPlatform("windows")]
internal static extern bool CreatePipe(out SafeFileHandle hReadPipe, out SafeFileHandle hWritePipe, SecurityAttributes lpPipeAttributes, int nSize);
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
[SupportedOSPlatform("windows")]
internal static extern bool ReadFile(SafeFileHandle hFile, byte[] lpBuffer, uint nNumberOfBytesToRead, out uint lpNumberOfBytesRead, IntPtr lpOverlapped);
/// <summary>
/// CoWaitForMultipleHandles allows us to wait in an STA apartment and still service RPC requests from other threads.
/// VS needs this in order to allow the in-proc compilers to properly initialize, since they will make calls from the
/// build thread which the main thread (blocked on BuildSubmission.Execute) must service.
/// </summary>
[DllImport("ole32.dll")]
[SupportedOSPlatform("windows")]
public static extern int CoWaitForMultipleHandles(COWAIT_FLAGS dwFlags, int dwTimeout, int cHandles, [MarshalAs(UnmanagedType.LPArray)] IntPtr[] pHandles, out int pdwIndex);
internal const uint GENERIC_READ = 0x80000000;
internal const uint FILE_SHARE_READ = 0x1;
internal const uint FILE_ATTRIBUTE_NORMAL = 0x80;
internal const uint FILE_FLAG_OPEN_REPARSE_POINT = 0x00200000;
internal const uint OPEN_EXISTING = 3;
[DllImport("kernel32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall,
SetLastError = true)]
[SupportedOSPlatform("windows")]
internal static extern SafeFileHandle CreateFile(
string lpFileName,
uint dwDesiredAccess,
uint dwShareMode,
IntPtr lpSecurityAttributes,
uint dwCreationDisposition,
uint dwFlagsAndAttributes,
IntPtr hTemplateFile);
[DllImport("kernel32.dll", SetLastError = true)]
[SupportedOSPlatform("windows")]
internal static extern bool GetFileTime(
SafeFileHandle hFile,
out FILETIME lpCreationTime,
out FILETIME lpLastAccessTime,
out FILETIME lpLastWriteTime);
[DllImport("kernel32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
[SupportedOSPlatform("windows")]
internal static extern bool CloseHandle(IntPtr hObject);
[DllImport("kernel32.dll", SetLastError = true)]
[SupportedOSPlatform("windows")]
internal static extern bool SetThreadErrorMode(int newMode, out int oldMode);
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
[return: MarshalAs(UnmanagedType.I1)]
[SupportedOSPlatform("windows")]
internal static extern bool CreateSymbolicLink(string symLinkFileName, string targetFileName, SymbolicLink dwFlags);
[DllImport("libc", SetLastError = true)]
internal static extern int symlink(string oldpath, string newpath);
#endregion
#region helper methods
internal static bool DirectoryExists(string fullPath)
{
return IsWindows
? DirectoryExistsWindows(fullPath)
: Directory.Exists(fullPath);
}
[SupportedOSPlatform("windows")]
internal static bool DirectoryExistsWindows(string fullPath)
{
WIN32_FILE_ATTRIBUTE_DATA data = new WIN32_FILE_ATTRIBUTE_DATA();
bool success = GetFileAttributesEx(fullPath, 0, ref data);
return success && (data.fileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
}
internal static bool FileExists(string fullPath)
{
return IsWindows
? FileExistsWindows(fullPath)
: File.Exists(fullPath);
}
[SupportedOSPlatform("windows")]
internal static bool FileExistsWindows(string fullPath)
{
WIN32_FILE_ATTRIBUTE_DATA data = new WIN32_FILE_ATTRIBUTE_DATA();
bool success = GetFileAttributesEx(fullPath, 0, ref data);
return success && (data.fileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0;
}
internal static bool FileOrDirectoryExists(string path)
{
return IsWindows
? FileOrDirectoryExistsWindows(path)
: File.Exists(path) || Directory.Exists(path);
}
[SupportedOSPlatform("windows")]
internal static bool FileOrDirectoryExistsWindows(string path)
{
WIN32_FILE_ATTRIBUTE_DATA data = new WIN32_FILE_ATTRIBUTE_DATA();
return GetFileAttributesEx(path, 0, ref data);
}
#endregion
}
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