Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Environment.cs / 2 / Environment.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
/*============================================================
**
** Class: Environment
**
**
** Purpose: Provides some basic access to some environment
** functionality.
**
**
============================================================*/
namespace System {
using System.IO;
using System.Security;
using System.Resources;
using System.Globalization;
using System.Collections;
using System.Security.Permissions;
using System.Text;
using System.Configuration.Assemblies;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Diagnostics;
using Microsoft.Win32;
using System.Runtime.CompilerServices;
using System.Threading;
using System.Runtime.ConstrainedExecution;
using System.Runtime.Versioning;
#if !FEATURE_PAL
[ComVisible(true)]
public enum EnvironmentVariableTarget {
Process = 0,
User = 1,
Machine = 2,
}
#endif
[ComVisible(true)]
public static class Environment {
const int MaximumLength = 32767; // maximun length for environment vairable name and value
internal sealed class ResourceHelper
{
private ResourceManager SystemResMgr;
// To avoid infinite loops when calling GetResourceString. See comments
// in GetResourceString for this field.
private Stack currentlyLoading;
// process-wide state (since this is only used in one domain),
// used to avoid the TypeInitialization infinite recusion
// in GetResourceStringCode
internal bool resourceManagerInited = false;
internal class GetResourceStringUserData
{
public ResourceHelper m_resourceHelper;
public String m_key;
public String m_retVal;
public bool m_lockWasTaken;
public GetResourceStringUserData(ResourceHelper resourceHelper, String key)
{
m_resourceHelper = resourceHelper;
m_key = key;
}
}
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
internal String GetResourceString(String key) {
if (key == null || key.Length == 0) {
BCLDebug.Assert(false, "Environment::GetResourceString with null or empty key. Bug in caller, or weird recursive loading problem?");
return "[Resource lookup failed - null or empty resource name]";
}
// We have a somewhat common potential for infinite
// loops with mscorlib's ResourceManager. If "potentially dangerous"
// code throws an exception, we will get into an infinite loop
// inside the ResourceManager and this "potentially dangerous" code.
// Potentially dangerous code includes the IO package, CultureInfo,
// parts of the loader, some parts of Reflection, Security (including
// custom user-written permissions that may parse an XML file at
// class load time), assembly load event handlers, etc. Essentially,
// this is not a bounded set of code, and we need to fix the problem.
// Fortunately, this is limited to mscorlib's error lookups and is NOT
// a general problem for all user code using the ResourceManager.
// The solution is to make sure only one thread at a time can call
// GetResourceString. Also, since resource lookups can be
// reentrant, if the same thread comes into GetResourceString
// twice looking for the exact same resource name before
// returning, we're going into an infinite loop and we should
// return a bogus string.
GetResourceStringUserData userData = new GetResourceStringUserData(this, key);
RuntimeHelpers.TryCode tryCode = new RuntimeHelpers.TryCode(GetResourceStringCode);
RuntimeHelpers.CleanupCode cleanupCode = new RuntimeHelpers.CleanupCode(GetResourceStringBackoutCode);
RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(tryCode, cleanupCode, userData);
return userData.m_retVal;
}
private void GetResourceStringCode(Object userDataIn)
{
GetResourceStringUserData userData = (GetResourceStringUserData) userDataIn;
ResourceHelper rh = userData.m_resourceHelper;
String key = userData.m_key;
Monitor.ReliableEnter(rh, ref userData.m_lockWasTaken);
// Are we recursively looking up the same resource?
if (rh.currentlyLoading != null && rh.currentlyLoading.Count > 0 && rh.currentlyLoading.Contains(key)) {
// This is often a bug in the BCL, security, NLS+ code,
// or the loader somewhere. However, this could also
// be a setup problem - check whether mscorlib &
// mscorwks are both of the same build flavor.
String stackTrace = "[Couldn't get a stack trace]";
try
{
StackTrace st = new StackTrace(true);
// Don't attempt to localize strings in this stack trace, otherwise it could cause
// infinite recursion. This stack trace is used for an Assert message only, and
// so the lack of localization should not be an issue.
stackTrace = st.ToString( System.Diagnostics.StackTrace.TraceFormat.NoResourceLookup );
}
catch(StackOverflowException) {}
catch(NullReferenceException) {}
catch(OutOfMemoryException) {}
BCLDebug.Assert(false, "Infinite recursion during resource lookup. Resource name: "+key+"\r\n"+stackTrace);
// Note: can't append the key name, since that may require
// an extra allocation...
userData.m_retVal = "[Resource lookup failed - infinite recursion or critical failure detected.]";
return;
}
if (rh.currentlyLoading == null)
rh.currentlyLoading = new Stack(4);
// Call class constructors preemptively, so that we cannot get into an infinite
// loop constructing a TypeInitializationException. If this were omitted,
// we could get the Infinite recursion assert above by failing type initialization
// between the Push and Pop calls below.
if (!rh.resourceManagerInited)
{
// process-critical code here. No ThreadAbortExceptions
// can be thrown here. Other exceptions percolate as normal.
RuntimeHelpers.PrepareConstrainedRegions();
try {
}
finally {
RuntimeHelpers.RunClassConstructor(typeof(ResourceManager).TypeHandle);
RuntimeHelpers.RunClassConstructor(typeof(ResourceReader).TypeHandle);
RuntimeHelpers.RunClassConstructor(typeof(RuntimeResourceSet).TypeHandle);
RuntimeHelpers.RunClassConstructor(typeof(BinaryReader).TypeHandle);
rh.resourceManagerInited = true;
}
}
rh.currentlyLoading.Push(key);
if (rh.SystemResMgr == null)
rh.SystemResMgr = new ResourceManager("mscorlib", typeof(Object).Assembly);
String s = rh.SystemResMgr.GetString(key, null);
rh.currentlyLoading.Pop();
BCLDebug.Assert(s!=null, "Managed resource string lookup failed. Was your resource name misspelled? Did you rebuild mscorlib after adding a resource to resources.txt? Debug this w/ cordbg and bug whoever owns the code that called rhironment.GetResourceString. Resource name was: \""+key+"\"");
userData.m_retVal = s;
}
[PrePrepareMethod]
private void GetResourceStringBackoutCode(Object userDataIn, bool exceptionThrown)
{
GetResourceStringUserData userData = (GetResourceStringUserData) userDataIn;
ResourceHelper rh = userData.m_resourceHelper;
if (exceptionThrown)
{
if (userData.m_lockWasTaken)
{
// Backout code - throw away potentially corrupt state
rh.SystemResMgr = null;
rh.currentlyLoading = null;
}
}
// Release the lock, if we took it.
if (userData.m_lockWasTaken)
{
Monitor.Exit(rh);
}
}
}
private static ResourceHelper m_resHelper; // Doesn't need to be initialized as they're zero-init.
#if IO_CANCELLATION_ENABLED
private static bool s_IsLonghorn;
private static bool s_CheckedOSType;
#endif
private static bool s_IsW2k3;
private static volatile bool s_CheckedOSW2k3;
private const int MaxMachineNameLength = 256;
// Private object for locking instead of locking on a public type for SQL reliability work.
private static Object s_InternalSyncObject;
private static Object InternalSyncObject {
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
get {
if (s_InternalSyncObject == null) {
Object o = new Object();
Interlocked.CompareExchange(ref s_InternalSyncObject, o, null);
}
return s_InternalSyncObject;
}
}
#if !FEATURE_PAL
private static OperatingSystem m_os; // Cached OperatingSystem value
private static OSName m_osname;
#endif // !FEATURE_PAL
/*==================================TickCount===================================
**Action: Gets the number of ticks since the system was started.
**Returns: The number of ticks since the system was started.
**Arguments: None
**Exceptions: None
==============================================================================*/
public static int TickCount {
get {
return nativeGetTickCount();
}
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern int nativeGetTickCount();
// Terminates this process with the given exit code.
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern void ExitNative(int exitCode);
[SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.UnmanagedCode)]
public static void Exit(int exitCode) {
ExitNative(exitCode);
}
public static int ExitCode {
get {
return nativeGetExitCode();
}
set {
nativeSetExitCode(value);
}
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern void nativeSetExitCode(int exitCode);
// Gets the exit code of the process.
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern int nativeGetExitCode();
[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.UnmanagedCode)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public static extern void FailFast(String message);
public static String CommandLine {
get {
new EnvironmentPermission(EnvironmentPermissionAccess.Read, "Path").Demand();
return GetCommandLineNative();
}
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern String GetCommandLineNative();
/*===============================CurrentDirectory===============================
**Action: Provides a getter and setter for the current directory. The original
** current directory is the one from which the process was started.
**Returns: The current directory (from the getter). Void from the setter.
**Arguments: The current directory to which to switch to the setter.
**Exceptions:
==============================================================================*/
public static String CurrentDirectory {
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
get{
return Directory.GetCurrentDirectory();
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
set {
Directory.SetCurrentDirectory(value);
}
}
// Returns the system directory (ie, C:\WinNT\System32).
public static String SystemDirectory {
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
get {
StringBuilder sb = new StringBuilder(Path.MAX_PATH);
int r = Win32Native.GetSystemDirectory(sb, Path.MAX_PATH);
BCLDebug.Assert(r < Path.MAX_PATH, "r < Path.MAX_PATH");
if (r==0) __Error.WinIOError();
String path = sb.ToString();
// Do security check
new FileIOPermission(FileIOPermissionAccess.PathDiscovery, path).Demand();
return path;
}
}
#if !FEATURE_PAL
// Returns the windows directory (ie, C:\WinNT).
// Used by NLS+ custom culures only at the moment.
internal static String InternalWindowsDirectory {
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
get {
StringBuilder sb = new StringBuilder(Path.MAX_PATH);
int r = Win32Native.GetWindowsDirectory(sb, Path.MAX_PATH);
BCLDebug.Assert(r < Path.MAX_PATH, "r < Path.MAX_PATH");
if (r==0) __Error.WinIOError();
String path = sb.ToString();
return path;
}
}
public static String ExpandEnvironmentVariables(String name)
{
if (name == null)
throw new ArgumentNullException("name");
if (name.Length == 0) {
return name;
}
// Do a security check to guarantee we can read each of the
// individual environment variables requested here.
String[] varArray = name.Split(new char[] {'%'});
StringBuilder vars = new StringBuilder();
int currentSize = 100;
StringBuilder blob = new StringBuilder(currentSize); // A somewhat reasonable default size
int size;
for(int i=1; i currentSize) {
currentSize = size;
blob.Capacity = currentSize;
blob.Length = 0;
size = Win32Native.ExpandEnvironmentStrings(envVar, blob, currentSize);
if (size == 0)
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
String temp = blob.ToString();
if (temp != envVar) { // We expanded successfully, we need to do String comparision here
// since %FOO% can become %FOOD
vars.Append(varArray[i]);
vars.Append(';');
}
}
new EnvironmentPermission(EnvironmentPermissionAccess.Read, vars.ToString()).Demand();
blob.Length = 0;
size = Win32Native.ExpandEnvironmentStrings(name, blob, currentSize);
if (size == 0)
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
while (size > currentSize) {
currentSize = size;
blob.Capacity = currentSize;
blob.Length = 0;
size = Win32Native.ExpandEnvironmentStrings(name, blob, currentSize);
if (size == 0)
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
return blob.ToString();
}
#endif // FEATURE_PAL
public static String MachineName {
get {
// In future release of operating systems, you might be able to rename a machine without
// rebooting. Therefore, don't cache this machine name.
new EnvironmentPermission(EnvironmentPermissionAccess.Read, "COMPUTERNAME").Demand();
StringBuilder buf = new StringBuilder(MaxMachineNameLength);
int len = MaxMachineNameLength;
if (Win32Native.GetComputerName(buf, ref len) == 0)
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_ComputerName"));
return buf.ToString();
}
}
public static int ProcessorCount {
get {
new EnvironmentPermission(EnvironmentPermissionAccess.Read, "NUMBER_OF_PROCESSORS").Demand();
Win32Native.SYSTEM_INFO info = new Win32Native.SYSTEM_INFO();
Win32Native.GetSystemInfo( ref info );
return info.dwNumberOfProcessors;
}
}
/*==============================GetCommandLineArgs==============================
**Action: Gets the command line and splits it appropriately to deal with whitespace,
** quotes, and escape characters.
**Returns: A string array containing your command line arguments.
**Arguments: None
**Exceptions: None.
==============================================================================*/
public static String[] GetCommandLineArgs() {
new EnvironmentPermission(EnvironmentPermissionAccess.Read, "Path").Demand();
return GetCommandLineArgsNative();
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern String[] GetCommandLineArgsNative();
// We need to keep this Fcall since it is used in AppDomain.cs.
// If we call GetEnvironmentVariable from AppDomain.cs, we will use StringBuilder class.
// That has side effect to change the ApartmentState of the calling Thread to MTA.
// So runtime can't change the ApartmentState of calling thread any more.
[MethodImplAttribute(MethodImplOptions.InternalCall)]
internal static extern String nativeGetEnvironmentVariable(String variable);
/*============================GetEnvironmentVariable============================
**Action:
**Returns:
**Arguments:
**Exceptions:
==============================================================================*/
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String GetEnvironmentVariable(String variable)
{
if (variable == null)
throw new ArgumentNullException("variable");
(new EnvironmentPermission(EnvironmentPermissionAccess.Read, variable)).Demand();
StringBuilder blob = new StringBuilder(128); // A somewhat reasonable default size
int requiredSize = Win32Native.GetEnvironmentVariable(variable, blob, blob.Capacity);
if( requiredSize == 0) { // GetEnvironmentVariable failed
if( Marshal.GetLastWin32Error() == Win32Native.ERROR_ENVVAR_NOT_FOUND)
return null;
}
while (requiredSize > blob.Capacity) { // need to retry since the environment variable might be changed
blob.Capacity = requiredSize;
blob.Length = 0;
requiredSize = Win32Native.GetEnvironmentVariable(variable, blob, blob.Capacity);
}
return blob.ToString();
}
#if !FEATURE_PAL
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static string GetEnvironmentVariable( string variable, EnvironmentVariableTarget target)
{
if( target == EnvironmentVariableTarget.Process) {
return GetEnvironmentVariable(variable);
}
if (variable == null) {
throw new ArgumentNullException("variable");
}
// Win9x doesn't support machine or user level environment variables
if( IsWin9X() ){
throw new NotSupportedException(Environment.GetResourceString("PlatformNotSupported_Win9x"));
}
(new EnvironmentPermission(PermissionState.Unrestricted)).Demand();
if( target == EnvironmentVariableTarget.Machine) {
using (RegistryKey environmentKey =
Registry.LocalMachine.OpenSubKey(@"System\CurrentControlSet\Control\Session Manager\Environment", false)) {
string value = environmentKey.GetValue(variable) as string;
return value;
}
}
else if( target == EnvironmentVariableTarget.User) {
using (RegistryKey environmentKey =
Registry.CurrentUser.OpenSubKey("Environment", false)) {
string value = environmentKey.GetValue(variable) as string;
return value;
}
}
else {
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Arg_EnumIllegalVal"), (int)target));
}
}
#endif
/*===========================GetEnvironmentVariables============================
**Action: Returns an IDictionary containing all enviroment variables and their values.
**Returns: An IDictionary containing all environment variables and their values.
**Arguments: None.
**Exceptions: None.
==============================================================================*/
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[ResourceExposure(ResourceScope.Machine)]
private static extern char[] nativeGetEnvironmentCharArray();
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static IDictionary GetEnvironmentVariables()
{
// Using an FCall is better than using PInvoke here since
// Interop Marshaler can't handle string which contains '\0', we need
// to allocate an unmanaged buffer, do the conversion and free the buffer
// if we do use PInvoke.
char[] block = nativeGetEnvironmentCharArray();
if( block == null) {
throw new OutOfMemoryException();
}
Hashtable table = new Hashtable(20);
StringBuilder vars = new StringBuilder();
// Copy strings out, parsing into pairs and inserting into the table.
// The first few environment variable entries start with an '='!
// The current working directory of every drive (except for those drives
// you haven't cd'ed into in your DOS window) are stored in the
// environment block (as =C:=pwd) and the program's exit code is
// as well (=ExitCode=00000000) Skip all that start with =.
// Read docs about Environment Blocks on MSDN's CreateProcess page.
// Format for GetEnvironmentStrings is:
// (=HiddenVar=value\0 | Variable=value\0)* \0
// See the description of Environment Blocks in MSDN's
// CreateProcess page (null-terminated array of null-terminated strings).
// Note the =HiddenVar's aren't always at the beginning.
// GetEnvironmentCharArray will not return the trailing 0 to terminate
// the array - we have the array length instead.
bool first = true;
for(int i=0; i= MaximumLength) {
throw new ArgumentException(Environment.GetResourceString("Argument_LongEnvVarValue"));
}
}
if(!Win32Native.SetEnvironmentVariable(variable, value)) {
int errorCode = Marshal.GetLastWin32Error();
// Allow user to try to clear a environment variable
if( errorCode == Win32Native.ERROR_ENVVAR_NOT_FOUND) {
return;
}
// The error message from Win32 is "The filename or extension is too long",
// which is not accurate.
if( errorCode == Win32Native.ERROR_FILENAME_EXCED_RANGE) {
throw new ArgumentException(Environment.GetResourceString("Argument_LongEnvVarValue"));
}
throw new ArgumentException(Win32Native.GetMessage(errorCode));
}
}
private static void CheckEnvironmentVariableName(string variable) {
if (variable == null) {
throw new ArgumentNullException("variable");
}
if( variable.Length == 0) {
throw new ArgumentException(Environment.GetResourceString("Argument_StringZeroLength"), "variable");
}
if( variable[0] == '\0') {
throw new ArgumentException(Environment.GetResourceString("Argument_StringFirstCharIsZero"), "variable");
}
if( variable.Length >= MaximumLength ) {
throw new ArgumentException(Environment.GetResourceString("Argument_LongEnvVarValue"));
}
if( variable.IndexOf('=') != -1) {
throw new ArgumentException(Environment.GetResourceString("Argument_IllegalEnvVarName"));
}
}
#if !FEATURE_PAL
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static void SetEnvironmentVariable(string variable, string value, EnvironmentVariableTarget target) {
if( target == EnvironmentVariableTarget.Process) {
SetEnvironmentVariable(variable, value);
return;
}
CheckEnvironmentVariableName(variable);
const int MaxKeyLength = 255; // maximum registry key length
// Win9X doesn't support registry name with more than 255 characters
if( variable.Length >= MaxKeyLength) {
throw new ArgumentException(Environment.GetResourceString("Argument_LongEnvVarName"));
}
// Win9x doesn't support machine or user level environment variables
if( IsWin9X() ){
throw new NotSupportedException(Environment.GetResourceString("PlatformNotSupported_Win9x"));
}
new EnvironmentPermission(PermissionState.Unrestricted).Demand();
// explicitly null out value if is the empty string.
if (String.IsNullOrEmpty(value) || value[0] == '\0') {
value = null;
}
if( target == EnvironmentVariableTarget.Machine) {
using (RegistryKey environmentKey =
Registry.LocalMachine.OpenSubKey(@"System\CurrentControlSet\Control\Session Manager\Environment", true)) {
if (value == null)
environmentKey.DeleteValue(variable, false);
else
environmentKey.SetValue(variable, value);
}
}
else if( target == EnvironmentVariableTarget.User) {
using (RegistryKey environmentKey =
Registry.CurrentUser.OpenSubKey("Environment", true)) {
if (value == null)
environmentKey.DeleteValue(variable, false);
else
environmentKey.SetValue(variable, value);
}
}
else {
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Arg_EnumIllegalVal"), (int)target));
}
// send a WM_SETTINGCHANGE message to all windows
IntPtr r = Win32Native.SendMessageTimeout(new IntPtr(Win32Native.HWND_BROADCAST), Win32Native.WM_SETTINGCHANGE, IntPtr.Zero, "Environment", 0, 1000, IntPtr.Zero);
if (r == IntPtr.Zero) BCLDebug.Assert(false, "SetEnvironmentVariable failed: " + Marshal.GetLastWin32Error());
}
#endif
/*===============================GetLogicalDrives===============================
**Action: Retrieves the names of the logical drives on this machine in the form "C:\".
**Arguments: None.
**Exceptions: IOException.
**Permissions: SystemInfo Permission.
==============================================================================*/
public static String[] GetLogicalDrives() {
#if !PLATFORM_UNIX
new EnvironmentPermission(PermissionState.Unrestricted).Demand();
int drives = Win32Native.GetLogicalDrives();
if (drives==0)
__Error.WinIOError();
uint d = (uint)drives;
int count = 0;
while (d != 0) {
if (((int)d & 1) != 0) count++;
d >>= 1;
}
String[] result = new String[count];
char[] root = new char[] {'A', ':', '\\'};
d = (uint)drives;
count = 0;
while (d != 0) {
if (((int)d & 1) != 0) {
result[count++] = new String(root);
}
d >>= 1;
root[0]++;
}
return result;
#else
return new String[0];
#endif // !PLATFORM_UNIX
}
/*===================================NewLine====================================
**Action: A property which returns the appropriate newline string for the given
** platform.
**Returns: \r\n on Win32.
**Arguments: None.
**Exceptions: None.
==============================================================================*/
public static String NewLine {
get {
#if !PLATFORM_UNIX
return "\r\n";
#else
return "\n";
#endif // !PLATFORM_UNIX
}
}
/*===================================Version====================================
**Action: Returns the COM+ version struct, describing the build number.
**Returns:
**Arguments:
**Exceptions:
==============================================================================*/
public static Version Version {
get {
return new Version(ThisAssembly.InformationalVersion);
}
}
/*==================================WorkingSet==================================
**Action:
**Returns:
**Arguments:
**Exceptions:
==============================================================================*/
[MethodImplAttribute(MethodImplOptions.InternalCall)]
internal static extern long nativeGetWorkingSet();
public static long WorkingSet {
get {
new EnvironmentPermission(PermissionState.Unrestricted).Demand();
return (long)nativeGetWorkingSet();
}
}
#if !FEATURE_PAL
/*==================================OSVersion===================================
**Action:
**Returns:
**Arguments:
**Exceptions:
==============================================================================*/
public static OperatingSystem OSVersion {
get {
if (m_os==null) { // We avoid the lock since we don't care if two threads will set this at the same time.
Microsoft.Win32.Win32Native.OSVERSIONINFO osvi = new Microsoft.Win32.Win32Native.OSVERSIONINFO();
if (!Win32Native.GetVersionEx(osvi)) {
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_GetVersion"));
}
Microsoft.Win32.Win32Native.OSVERSIONINFOEX osviEx = new Microsoft.Win32.Win32Native.OSVERSIONINFOEX();
if( osvi.PlatformId != Win32Native.VER_PLATFORM_WIN32_WINDOWS) {
// for OS other than win9x, we need to get Service pack information
if (!Win32Native.GetVersionEx(osviEx)) {
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_GetVersion"));
}
}
PlatformID id;
switch (osvi.PlatformId) {
case Win32Native.VER_PLATFORM_WIN32_NT:
id = PlatformID.Win32NT;
break;
case Win32Native.VER_PLATFORM_WIN32_WINDOWS:
id = PlatformID.Win32Windows;
break;
case Win32Native.VER_PLATFORM_WIN32s:
id = PlatformID.Win32S;
break;
case Win32Native.VER_PLATFORM_WINCE:
id = PlatformID.WinCE;
break;
default:
BCLDebug.Assert(false,"false");
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_InvalidPlatformID"));
}
Version v = new Version(osvi.MajorVersion, osvi.MinorVersion, osvi.BuildNumber, (osviEx.ServicePackMajor << 16) |osviEx.ServicePackMinor);
m_os = new OperatingSystem(id, v, osvi.CSDVersion);
}
BCLDebug.Assert(m_os != null, "m_os != null");
return m_os;
}
}
#if IO_CANCELLATION_ENABLED
internal static bool IsLonghorn {
get {
if (!s_CheckedOSType) {
OperatingSystem OS = Environment.OSVersion;
s_IsLonghorn = OS.Platform == PlatformID.Win32NT && OS.Version.Major >= 6;
s_CheckedOSType = true;
}
return s_IsLonghorn;
}
}
#endif
internal static bool IsW2k3 {
get {
if (!s_CheckedOSW2k3) {
OperatingSystem OS = Environment.OSVersion;
s_IsW2k3 = ( (OS.Platform == PlatformID.Win32NT) && (OS.Version.Major == 5) && (OS.Version.Minor == 2));
s_CheckedOSW2k3 = true;
}
return s_IsW2k3;
}
}
internal static bool RunningOnWinNT {
get {
return OSVersion.Platform == PlatformID.Win32NT;
}
}
[Serializable]
internal enum OSName
{
Invalid = 0,
Unknown = 1,
Win9x = 0x40,
Win95 = 1 | Win9x,
Win98 = 2 | Win9x,
WinMe = 3 | Win9x,
WinNT = 0x80,
Nt4 = 1 | WinNT,
Win2k = 2 | WinNT
}
internal static OSName OSInfo
{
get
{
if (m_osname == OSName.Invalid)
{
lock(InternalSyncObject)
{
if (m_osname == OSName.Invalid)
{
Microsoft.Win32.Win32Native.OSVERSIONINFO osvi = new Microsoft.Win32.Win32Native.OSVERSIONINFO();
bool r = Win32Native.GetVersionEx(osvi);
if (!r)
{
BCLDebug.Assert(r, "OSVersion native call failed.");
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_GetVersion"));
}
switch (osvi.PlatformId)
{
case Win32Native.VER_PLATFORM_WIN32_NT:
switch(osvi.MajorVersion)
{
case 5:
m_osname = OSName.Win2k;
break;
case 4:
m_osname = OSName.Nt4;
break;
default:
m_osname = OSName.WinNT;
break;
}
break;
case Win32Native.VER_PLATFORM_WIN32_WINDOWS:
switch(osvi.MajorVersion)
{
case 5:
m_osname = OSName.WinMe;
break;
case 4:
if (osvi.MinorVersion == 0)
m_osname = OSName.Win95;
else
m_osname = OSName.Win98;
break;
default:
m_osname = OSName.Win9x;
break;
}
break;
default:
m_osname = OSName.Unknown; // Unknown OS
break;
}
}
}
}
return m_osname;
}
}
#endif // !FEATURE_PAL
// This needs to be removed in a future release.
internal static bool IsWin9X() {
#if FEATURE_PAL
return false;
#else
return Environment.OSVersion.Platform == PlatformID.Win32Windows;
#endif // FEATURE_PAL
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
internal static extern bool nativeIsWin9x();
/*==================================StackTrace==================================
**Action:
**Returns:
**Arguments:
**Exceptions:
==============================================================================*/
public static String StackTrace {
get {
new EnvironmentPermission(PermissionState.Unrestricted).Demand();
return GetStackTrace(null, true);
}
}
internal static String GetStackTrace(Exception e, bool needFileInfo)
{
// Note: Setting needFileInfo to true will start up COM and set our
// apartment state. Try to not call this when passing "true"
// before the EE's ExecuteMainMethod has had a chance to set up the
// apartment state. --
StackTrace st;
if (e == null)
st = new StackTrace(needFileInfo);
else
st = new StackTrace(e, needFileInfo);
// Do no include a trailing newline for backwards compatibility
return st.ToString( System.Diagnostics.StackTrace.TraceFormat.Normal );
}
private static void InitResourceHelper() {
// Only the default AppDomain should have a ResourceHelper. All calls to
// GetResourceString from any AppDomain delegate to GetResourceStringLocal
// in the default AppDomain via the fcall GetResourceFromDefault.
// Use Thread.BeginCriticalRegion to tell the CLR all managed
// allocations within this block are appdomain-critical.
// Use a CER to ensure we always exit this region.
bool enteredRegion = false;
bool tookLock = false;
RuntimeHelpers.PrepareConstrainedRegions();
try {
RuntimeHelpers.PrepareConstrainedRegions();
try {
}
finally {
Thread.BeginCriticalRegion();
enteredRegion = true;
Monitor.Enter(Environment.InternalSyncObject);
tookLock = true;
}
if (m_resHelper == null) {
ResourceHelper rh = new ResourceHelper();
System.Threading.Thread.MemoryBarrier();
m_resHelper =rh;
}
}
finally {
if (tookLock)
Monitor.Exit(Environment.InternalSyncObject);
if (enteredRegion)
Thread.EndCriticalRegion();
}
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
internal extern static String GetResourceFromDefault(String key);
// Looks up the resource string value for key.
//
// if you change this method's signature then you must change the code that calls it
// in excep.cpp and probably you will have to visit mscorlib.h to add the new signature
// as well as metasig.h to create the new signature type
internal static String GetResourceStringLocal(String key) {
if (m_resHelper == null)
InitResourceHelper();
return m_resHelper.GetResourceString(key);
}
[ResourceExposure(ResourceScope.None)]
internal static String GetResourceString(String key) {
return GetResourceFromDefault(key);
}
[ResourceExposure(ResourceScope.None)]
internal static String GetResourceString(String key, params Object[]values) {
String s = GetResourceFromDefault(key);
return String.Format(CultureInfo.CurrentCulture, s, values);
}
public static bool HasShutdownStarted {
get { return nativeHasShutdownStarted(); }
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern bool nativeHasShutdownStarted();
// This is the temporary Whidbey stub for compatibility flags
[MethodImplAttribute(MethodImplOptions.InternalCall)]
internal static extern bool GetCompatibilityFlag(CompatibilityFlag flag);
public static string UserName {
get {
new EnvironmentPermission(EnvironmentPermissionAccess.Read,"UserName").Demand();
StringBuilder sb = new StringBuilder(256);
int size = sb.Capacity;
Win32Native.GetUserName(sb, ref size);
return sb.ToString();
}
}
#if !FEATURE_PAL
// Note that this is a handle to a process window station, but it does
// not need to be closed. CloseWindowStation would ignore this handle.
// We also do handle equality checking as well. This isn't a great fit
// for SafeHandle. We don't gain anything by using SafeHandle here.
private static IntPtr processWinStation; // Doesn't need to be initialized as they're zero-init.
private static bool isUserNonInteractive;
public static bool UserInteractive {
[ResourceExposure(ResourceScope.None)]
[ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
get {
if ((OSInfo & OSName.WinNT) == OSName.WinNT) { // On WinNT
IntPtr hwinsta = Win32Native.GetProcessWindowStation();
if (hwinsta != IntPtr.Zero && processWinStation != hwinsta) {
int lengthNeeded = 0;
Win32Native.USEROBJECTFLAGS flags = new Win32Native.USEROBJECTFLAGS();
if (Win32Native.GetUserObjectInformation(hwinsta, Win32Native.UOI_FLAGS, flags, Marshal.SizeOf(flags),ref lengthNeeded)) {
if ((flags.dwFlags & Win32Native.WSF_VISIBLE) == 0) {
isUserNonInteractive = true;
}
}
processWinStation = hwinsta;
}
}
// The logic is reversed to avoid static initialization to true
return !isUserNonInteractive;
}
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static string GetFolderPath(SpecialFolder folder) {
if (!Enum.IsDefined(typeof(SpecialFolder),folder))
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Arg_EnumIllegalVal"), (int)folder));
StringBuilder sb = new StringBuilder(Path.MAX_PATH);
Win32Native.SHGetFolderPath(IntPtr.Zero, (int) folder, IntPtr.Zero, Win32Native.SHGFP_TYPE_CURRENT, sb);
String s = sb.ToString();
new FileIOPermission( FileIOPermissionAccess.PathDiscovery, s ).Demand();
return s;
}
public static string UserDomainName {
get {
new EnvironmentPermission(EnvironmentPermissionAccess.Read,"UserDomain").Demand();
byte[] sid = new byte[1024];
int sidLen = sid.Length;
StringBuilder domainName = new StringBuilder(1024);
int domainNameLen = domainName.Capacity;
int peUse;
// Note: This doesn't work on Win9x. We can implement this
// functionality on Win9x by writing a 16 bit DLL and
// calling the LAN Manager method NetWkstaGetInfo(). See
// http://support.microsoft.com/support/kb/articles/Q155/6/98.asp
// We don't have the time to implement this in V1. Hopefully
// by the time V2 rolls around, everyone will run Windows XP.
byte ret;
if (OSVersion.Platform == PlatformID.Win32NT) {
ret = Win32Native.GetUserNameEx(Win32Native.NameSamCompatible, domainName, ref domainNameLen);
if (ret == 1) {
string samName = domainName.ToString();
int index = samName.IndexOf('\\');
if( index != -1) {
return samName.Substring(0, index);
}
}
domainNameLen = domainName.Capacity;
}
bool success = Win32Native.LookupAccountName(null, UserName, sid, ref sidLen, domainName, ref domainNameLen, out peUse);
if (!success) {
int hr = Marshal.GetLastWin32Error();
if (hr == Win32Native.ERROR_CALL_NOT_IMPLEMENTED)
throw new PlatformNotSupportedException(Environment.GetResourceString("PlatformNotSupported_Win9x"));
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_UserDomainName"));
}
return domainName.ToString();
}
}
[ComVisible(true)]
public enum SpecialFolder {
//
// Represents the file system directory that serves as a common repository for
// application-specific data for the current, roaming user.
// A roaming user works on more than one computer on a network. A roaming user's
// profile is kept on a server on the network and is loaded onto a system when the
// user logs on.
//
ApplicationData = Win32Native.CSIDL_APPDATA,
//
// Represents the file system directory that serves as a common repository for application-specific data that
// is used by all users.
//
CommonApplicationData = Win32Native.CSIDL_COMMON_APPDATA,
//
// Represents the file system directory that serves as a common repository for application specific data that
// is used by the current, non-roaming user.
//
LocalApplicationData = Win32Native.CSIDL_LOCAL_APPDATA,
//
// Represents the file system directory that serves as a common repository for Internet
// cookies.
//
Cookies = Win32Native.CSIDL_COOKIES,
Desktop = Win32Native.CSIDL_DESKTOP,
//
// Represents the file system directory that serves as a common repository for the user's
// favorite items.
//
Favorites = Win32Native.CSIDL_FAVORITES,
//
// Represents the file system directory that serves as a common repository for Internet
// history items.
//
History = Win32Native.CSIDL_HISTORY,
//
// Represents the file system directory that serves as a common repository for temporary
// Internet files.
//
InternetCache = Win32Native.CSIDL_INTERNET_CACHE,
//
// Represents the file system directory that contains
// the user's program groups.
//
Programs = Win32Native.CSIDL_PROGRAMS,
MyComputer = Win32Native.CSIDL_DRIVES,
MyMusic = Win32Native.CSIDL_MYMUSIC,
MyPictures = Win32Native.CSIDL_MYPICTURES,
//
// Represents the file system directory that contains the user's most recently used
// documents.
//
Recent = Win32Native.CSIDL_RECENT,
//
// Represents the file system directory that contains Send To menu items.
//
SendTo = Win32Native.CSIDL_SENDTO,
//
// Represents the file system directory that contains the Start menu items.
//
StartMenu = Win32Native.CSIDL_STARTMENU,
//
// Represents the file system directory that corresponds to the user's Startup program group. The system
// starts these programs whenever any user logs on to Windows NT, or
// starts Windows 95 or Windows 98.
//
Startup = Win32Native.CSIDL_STARTUP,
//
// System directory.
//
System = Win32Native.CSIDL_SYSTEM,
//
// Represents the file system directory that serves as a common repository for document
// templates.
//
Templates = Win32Native.CSIDL_TEMPLATES,
//
// Represents the file system directory used to physically store file objects on the desktop.
// This should not be confused with the desktop folder itself, which is
// a virtual folder.
//
DesktopDirectory = Win32Native.CSIDL_DESKTOPDIRECTORY,
//
// Represents the file system directory that serves as a common repository for documents.
//
Personal = Win32Native.CSIDL_PERSONAL,
// "MyDocuments" is a better name than "Personal"
MyDocuments = Win32Native.CSIDL_PERSONAL,
//
// Represents the program files folder.
//
ProgramFiles = Win32Native.CSIDL_PROGRAM_FILES,
//
// Represents the folder for components that are shared across applications.
//
CommonProgramFiles = Win32Native.CSIDL_PROGRAM_FILES_COMMON,
}
#endif // !FEATURE_PAL
}
}
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