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);
si.dwFlags = NativeMethods.STARTF_USESTDHANDLES;
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 {
throw new NotSupportedException();
}
}
}
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;
}