#include <iostream>
#include <fstream>
#include <string>

#if defined(_WIN32)
#define WINDOWS_LEAN_AND_MEAN
#include <windows.h>
#undef max
#else
extern char **environ; // see 'man environ'
#endif

int main(int argc, const char* argv[])
{
	if(argc < 2)
	{
		return 0;
	}

	std::string cmd = argv[1];

	if(cmd == "envdump")
	{
		if(argc < 3)
		{
			return 0;
		}

		std::ofstream ostrm(argv[2], std::ios::binary);
		if(ostrm.bad())
		{
			std::cout << "Error: Could not write to " << argv[2] << "\n";
		}
#if defined(_WIN32)
		auto env_strings = GetEnvironmentStrings();
		const char* ptr = env_strings;
		std::string env;
		while(true)
		{
			if(*ptr == '\0')
			{
				if(env.empty())
				{
					// no more
					break;
				}
				ostrm << env << "\n";
				env.clear();
				++ptr;
				continue;
			}

			env += *ptr;
			++ptr;
		}
		FreeEnvironmentStrings(env_strings);
#else
		for(auto current = environ; *current; ++current)
		{
			ostrm << (*current) << "\n";
		}
#endif
	}

	if(cmd == "retval")
	{
		if(argc < 3)
		{
			return 0;
		}
		return std::stoi(argv[2]);
	}

	if(cmd == "abort")
	{
		abort();
	}

	if(cmd == "throw")
	{
		throw "ouch";
	}

	return 0;
}