static extern bool CreateProcess(
string lpApplicationName,
string lpCommandLine,
ref SecurityAttributes lpProcessAttributes,
ref SecurityAttributes lpThreadAttributes,
bool bInheritHandles,
uint dwCreationFlags,
IntPtr lpEnvironment,
string lpCurrentDirectory,
[In] ref StartupInfoEx lpStartupInfo,
out ProcessInfomration lpProcessInformation
);
// Internal methods
///////////////////////
static string RunUnderParent(string executable, string arguments, int parentProcessId)
{
var pInfo = new ProcessInfomration();
var sInfoEx = new StartupInfoEx();
sInfoEx.StartupInfo.cb = Marshal.SizeOf(sInfoEx);
var lpValue = IntPtr.Zero;
try {
var lpSize = IntPtr.Zero;
var success = InitializeProcThreadAttributeList(IntPtr.Zero, 1, 0, ref lpSize);
if (success || lpSize == IntPtr.Zero)
{
return($"could not get process thread attribute list size");
}
sInfoEx.lpAttributeList = Marshal.AllocHGlobal(lpSize);
success = InitializeProcThreadAttributeList(sInfoEx.lpAttributeList, 1, 0, ref lpSize);
if (!success)
{
return($"error in InitializeProcThreadAttributeList: {Marshal.GetLastWin32Error()}");
}
var parentHandle = Process.GetProcessById(parentProcessId).Handle;
lpValue = Marshal.AllocHGlobal(IntPtr.Size);
Marshal.WriteIntPtr(lpValue, parentHandle);
success = UpdateProcThreadAttribute(
sInfoEx.lpAttributeList,
0,
(IntPtr)PROC_THREAD_ATTRIBUTE_PARENT_PROCESS,
lpValue,
(IntPtr)IntPtr.Size,
IntPtr.Zero,
IntPtr.Zero);
if (!success)
{
return($"error in UpdateProcThreadAttribute: {Marshal.GetLastWin32Error()}");
}
var pSec = new SecurityAttributes();
var tSec = new SecurityAttributes();
pSec.nLength = Marshal.SizeOf(pSec);
tSec.nLength = Marshal.SizeOf(tSec);
success = CreateProcess(
executable,
" " + arguments,
ref pSec,
ref tSec,
false,
EXTENDED_STARTUPINFO_PRESENT,
IntPtr.Zero,
null,
ref sInfoEx,
out pInfo
);
if (!success)
{
return($"error in CreateProcess: {Marshal.GetLastWin32Error()}");
}
return(null);
} finally {
if (sInfoEx.lpAttributeList != IntPtr.Zero)
{
DeleteProcThreadAttributeList(sInfoEx.lpAttributeList);
Marshal.FreeHGlobal(sInfoEx.lpAttributeList);
}
Marshal.FreeHGlobal(lpValue);
if (pInfo.hProcess != IntPtr.Zero)
{
CloseHandle(pInfo.hProcess);
}
if (pInfo.hThread != IntPtr.Zero)
{
CloseHandle(pInfo.hThread);
}
}
}
