Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / CodeDOM / Compiler / Executor.cs / 1 / Executor.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.CodeDom.Compiler { using System.Diagnostics; using System; using System.ComponentModel; using System.Text; using System.Threading; using System.IO; using System.Collections; using System.Collections.Specialized; using System.Reflection; using System.Runtime.InteropServices; using System.CodeDom; using System.Security; using System.Security.Permissions; using System.Security.Principal; using Microsoft.Win32; using Microsoft.Win32.SafeHandles; using System.Globalization; using System.Runtime.CompilerServices; using System.Runtime.ConstrainedExecution; ////// [PermissionSet(SecurityAction.LinkDemand, Name="FullTrust")] [PermissionSet(SecurityAction.InheritanceDemand, Name="FullTrust")] public sealed class Executor { // How long (in milliseconds) do we wait for the program to terminate private const int ProcessTimeOut = 600000; private Executor() { } ////// Provides command execution functions for the CodeDom compiler. /// ////// internal static string GetRuntimeInstallDirectory() { return RuntimeEnvironment.GetRuntimeDirectory(); } private static FileStream CreateInheritedFile(string file) { return new FileStream(file, FileMode.CreateNew, FileAccess.Write, FileShare.Read | FileShare.Inheritable); } ////// Gets the runtime install directory. /// ////// public static void ExecWait(string cmd, TempFileCollection tempFiles) { string outputName = null; string errorName = null; ExecWaitWithCapture(null, cmd, tempFiles, ref outputName, ref errorName); } ////// public static int ExecWaitWithCapture(string cmd, TempFileCollection tempFiles, ref string outputName, ref string errorName) { return ExecWaitWithCapture(null, cmd, Environment.CurrentDirectory, tempFiles, ref outputName, ref errorName, null); } ///[To be supplied.] ////// public static int ExecWaitWithCapture(string cmd, string currentDir, TempFileCollection tempFiles, ref string outputName, ref string errorName) { return ExecWaitWithCapture(null, cmd, currentDir, tempFiles, ref outputName, ref errorName, null); } ///[To be supplied.] ////// public static int ExecWaitWithCapture(IntPtr userToken, string cmd, TempFileCollection tempFiles, ref string outputName, ref string errorName) { return ExecWaitWithCapture(new SafeUserTokenHandle(userToken, false), cmd, Environment.CurrentDirectory, tempFiles, ref outputName, ref errorName, null); } ///[To be supplied.] ////// public static int ExecWaitWithCapture(IntPtr userToken, string cmd, string currentDir, TempFileCollection tempFiles, ref string outputName, ref string errorName) { return ExecWaitWithCapture(new SafeUserTokenHandle(userToken, false), cmd, Environment.CurrentDirectory, tempFiles, ref outputName, ref errorName, null); } ///[To be supplied.] ////// internal static int ExecWaitWithCapture(SafeUserTokenHandle userToken, string cmd, string currentDir, TempFileCollection tempFiles, ref string outputName, ref string errorName, string trueCmdLine) { int retValue = 0; // Undo any current impersonation, call ExecWaitWithCaptureUnimpersonated, and reimpersonate #if !FEATURE_PAL // the extra try-catch is here to mitigate exception filter injection attacks. try { WindowsImpersonationContext impersonation = RevertImpersonation(); try { #endif // Execute the process retValue = ExecWaitWithCaptureUnimpersonated(userToken, cmd, currentDir, tempFiles, ref outputName, ref errorName, trueCmdLine); #if !FEATURE_PAL } finally { ReImpersonate(impersonation); } } catch { throw; } #endif return retValue; } private static unsafe int ExecWaitWithCaptureUnimpersonated(SafeUserTokenHandle userToken, string cmd, string currentDir, TempFileCollection tempFiles, ref string outputName, ref string errorName, string trueCmdLine) { IntSecurity.UnmanagedCode.Demand(); FileStream output; FileStream error; int retValue = 0; if (outputName == null || outputName.Length == 0) outputName = tempFiles.AddExtension("out"); if (errorName == null || errorName.Length == 0) errorName = tempFiles.AddExtension("err"); // Create the files output = CreateInheritedFile(outputName); error = CreateInheritedFile(errorName); bool success = false; SafeNativeMethods.PROCESS_INFORMATION pi = new SafeNativeMethods.PROCESS_INFORMATION(); SafeProcessHandle procSH = new SafeProcessHandle(); SafeThreadHandle threadSH = new SafeThreadHandle(); SafeUserTokenHandle primaryToken = null; try { // Output the command line... StreamWriter sw = new StreamWriter(output, Encoding.UTF8); sw.Write(currentDir); sw.Write("> "); // 'true' command line is used in case the command line points to // a response file sw.WriteLine(trueCmdLine != null ? trueCmdLine : cmd); sw.WriteLine(); sw.WriteLine(); sw.Flush(); NativeMethods.STARTUPINFO si = new NativeMethods.STARTUPINFO(); si.cb = Marshal.SizeOf(si); #if FEATURE_PAL si.dwFlags = NativeMethods.STARTF_USESTDHANDLES; #else //!FEATURE_PAL si.dwFlags = NativeMethods.STARTF_USESTDHANDLES | NativeMethods.STARTF_USESHOWWINDOW; si.wShowWindow = NativeMethods.SW_HIDE; #endif //!FEATURE_PAL si.hStdOutput = output.SafeFileHandle; si.hStdError = error.SafeFileHandle; si.hStdInput = new SafeFileHandle(UnsafeNativeMethods.GetStdHandle(NativeMethods.STD_INPUT_HANDLE), false); // // Prepare the environment // #if PLATFORM_UNIX StringDictionary environment = new CaseSensitiveStringDictionary(); #else StringDictionary environment = new StringDictionary (); #endif // PLATFORM_UNIX // Add the current environment foreach ( DictionaryEntry entry in Environment.GetEnvironmentVariables () ) environment.Add ( (string) entry.Key, (string) entry.Value ); // Add the flag to indicate restricted security in the process environment["_ClrRestrictSecAttributes"] = "1"; #if DEBUG environment["OANOCACHE"] = "1"; #endif // set up the environment block parameter byte[] environmentBytes = EnvironmentBlock.ToByteArray(environment, false); fixed (byte* environmentBytesPtr = environmentBytes) { IntPtr environmentPtr = new IntPtr((void*)environmentBytesPtr); if (userToken == null || userToken.IsInvalid) { RuntimeHelpers.PrepareConstrainedRegions(); try {} finally { success = NativeMethods.CreateProcess( null, // String lpApplicationName, new StringBuilder(cmd), // String lpCommandLine, null, // SECURITY_ATTRIBUTES lpProcessAttributes, null, // SECURITY_ATTRIBUTES lpThreadAttributes, true, // bool bInheritHandles, 0, // int dwCreationFlags, environmentPtr, // int lpEnvironment, currentDir, // String lpCurrentDirectory, si, // STARTUPINFO lpStartupInfo, pi); // PROCESS_INFORMATION lpProcessInformation); if ( pi.hProcess!= (IntPtr)0 && pi.hProcess!= (IntPtr)NativeMethods.INVALID_HANDLE_VALUE) procSH.InitialSetHandle(pi.hProcess); if ( pi.hThread != (IntPtr)0 && pi.hThread != (IntPtr)NativeMethods.INVALID_HANDLE_VALUE) threadSH.InitialSetHandle(pi.hThread); } } else { #if FEATURE_PAL throw new NotSupportedException(); #else success = SafeUserTokenHandle.DuplicateTokenEx( userToken, NativeMethods.TOKEN_ALL_ACCESS, null, NativeMethods.IMPERSONATION_LEVEL_SecurityImpersonation, NativeMethods.TOKEN_TYPE_TokenPrimary, out primaryToken ); if (success) { RuntimeHelpers.PrepareConstrainedRegions(); try {} finally { success = NativeMethods.CreateProcessAsUser( primaryToken, // int token, null, // String lpApplicationName, cmd, // String lpCommandLine, null, // SECURITY_ATTRIBUTES lpProcessAttributes, null, // SECURITY_ATTRIBUTES lpThreadAttributes, true, // bool bInheritHandles, 0, // int dwCreationFlags, new HandleRef(null, environmentPtr), // int lpEnvironment, currentDir, // String lpCurrentDirectory, si, // STARTUPINFO lpStartupInfo, pi); // PROCESS_INFORMATION lpProcessInformation); if ( pi.hProcess!= (IntPtr)0 && pi.hProcess!= (IntPtr)NativeMethods.INVALID_HANDLE_VALUE) procSH.InitialSetHandle(pi.hProcess); if ( pi.hThread != (IntPtr)0 && pi.hThread != (IntPtr)NativeMethods.INVALID_HANDLE_VALUE) threadSH.InitialSetHandle(pi.hThread); } } #endif // !FEATURE_PAL } } } finally { // Close the file handles if (!success && (primaryToken != null && !primaryToken.IsInvalid)) { primaryToken.Close(); primaryToken = null; } output.Close(); error.Close(); } if (success) { try { int ret = NativeMethods.WaitForSingleObject(procSH, ProcessTimeOut); // Check for timeout if (ret == NativeMethods.WAIT_TIMEOUT) { throw new ExternalException(SR.GetString(SR.ExecTimeout, cmd), NativeMethods.WAIT_TIMEOUT); } if (ret != NativeMethods.WAIT_OBJECT_0) { throw new ExternalException(SR.GetString(SR.ExecBadreturn, cmd), Marshal.GetLastWin32Error()); } // Check the process's exit code int status = NativeMethods.STILL_ACTIVE; if (!NativeMethods.GetExitCodeProcess(procSH, out status)) { throw new ExternalException(SR.GetString(SR.ExecCantGetRetCode, cmd), Marshal.GetLastWin32Error()); } retValue = status; } finally { procSH.Close(); threadSH.Close(); if (primaryToken != null && !primaryToken.IsInvalid) primaryToken.Close(); } } else { throw new ExternalException(SR.GetString(SR.ExecCantExec, cmd), Marshal.GetLastWin32Error()); } return retValue; } #if !FEATURE_PAL internal static WindowsImpersonationContext RevertImpersonation() { new SecurityPermission(SecurityPermissionFlag.ControlPrincipal).Assert(); return WindowsIdentity.Impersonate(new IntPtr(0)); } #endif // !FEATURE_PAL #if !FEATURE_PAL internal static void ReImpersonate(WindowsImpersonationContext impersonation){ impersonation.Undo(); } #endif // !FEATURE_PAL } }[To be supplied.] ///
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