self_entry_point.cc

extern "C" int self_main(int argc, char**argv)
{
    //char cmdline[1024]={};
    std::string cmdLine;

    //std::getline(std::fstream("/proc/self/cmdline", std::ios::binary|std::ios::in), cmdLine);
    std::getline(std::fstream("/proc/self/cmdline", std::ios::in), cmdLine);

    std::string::size_type pos=0;
    std::string oldStr;
    oldStr.resize(1);
    oldStr[0]='\0';
    std::string newStr=" ";

    while((pos=cmdLine.find(oldStr,pos))!=std::string::npos)
    {
        cmdLine.replace(pos,oldStr.length(), newStr);
        pos+=oldStr.length();
    }

    //cmdLine.replace(std::string("\0"),std::string(" "));

    auto strStream=std::stringstream(cmdLine);
    std::vector<std::string> tokens{std::istream_iterator<std::string>(strStream),
                std::istream_iterator<std::string>()};


    std::vector<char*> tokenToken(tokens.size());
    std::transform(
            std::begin(tokens),
            std::end(tokens),
            std::begin(tokenToken),
            [](const std::string& tmpStr)-> char * {
                return const_cast<char* >(tmpStr.data());
            });

    argc=tokenToken.size();
    argv=tokenToken.data();
}