public static Dictionary <string, string> GetEnvironmentVariablesCore(IntPtr hProcess)
{
IntPtr penv = GetPenv(hProcess);
int dataSize;
if (!HasReadAccess(hProcess, penv, out dataSize))
{
throw new Win32Exception("Unable to read environment block.");
}
const int maxEnvSize = 32767;
if (dataSize > maxEnvSize)
{
dataSize = maxEnvSize;
}
var envData = new byte[dataSize];
var res_len = IntPtr.Zero;
bool b = ProcessNativeMethods.ReadProcessMemory(
hProcess,
penv,
envData,
new IntPtr(dataSize),
ref res_len);
if (!b || (int)res_len != dataSize)
{
throw new Win32Exception("Unable to read environment block data.");
}
return(EnvToDictionary(envData));
}
// should just be ReadIntPtr not TryReadIntPtr, throw when failed
private static bool TryReadIntPtr(IntPtr hProcess, IntPtr ptr, out IntPtr readPtr)
{
var dataSize = new IntPtr(IntPtr.Size);
var res_len = IntPtr.Zero;
if (!ProcessNativeMethods.ReadProcessMemory(
hProcess,
ptr,
out readPtr,
dataSize,
ref res_len))
{
// automatically GetLastError() and format message
throw new Win32Exception();
}
// This is more like an assert
return(res_len == dataSize);
}
