Retro68/LaunchAPPL/Client/MakeExecutable.cc

#include <string>
#include <iostream>
#include <fstream>
#include <boost/filesystem.hpp>
#include <stdlib.h>

#include "ResourceFile.h"

using std::string;
namespace fs = boost::filesystem;

void MakeExecutable(string fn)
{
	ResourceFile rsrcFile(fn);
	if(!rsrcFile.read())
	{
		std::cerr << "Cannot read application file: " << fn << std::endl;
		exit(1);
	}
	if(!rsrcFile.hasPlainDataFork())
	{
		std::cerr << "--make-executable can not be used with this data format.\n";
		exit(1);
	}

	string headerString = "#!" RETRO68_PREFIX "/bin/LaunchAPPL\n";

	bool hadShebang = false;
	if(rsrcFile.data.size())
	{
		if(headerString.substr(2) == "#!")
		{
			string::size_type eol = headerString.find('\n');
			if(eol != string::npos && eol >= 13 && eol < 4096)
			{
				if(headerString.substr(eol-11,11) == "/LaunchAPPL")
					hadShebang = true;
			}
		}

		if(!hadShebang)
		{
			std::cerr << "Unfortunately, the application already has a data fork.\n";
			std::cerr << "LaunchAPPL --make-executable does not currently work for PowerPC apps.\n";
			// TODO: if it's a PEF container, move it back a little and update cfrg
			exit(1);
		}
	}

	std::fstream(fn, std::ios::in | std::ios::out | std::ios::binary) << headerString;

	fs::permissions(fs::path(fn), fs::owner_exe | fs::group_exe | fs::others_exe | fs::add_perms);
}