c++11 - Execute a Windows command with a controled environment in C++ -

i trying execute command in c++11 under windows, , want environment char** manually set.

i saw popen(), system() , createprocess() functions, cannot achieve theses functions. looking alternative unix exec* functions, allows precise environment.

you want lpenvironment parameter of createprocess:

lpenvironment [in, optional]

a pointer environment block new process. if parameter null, new process uses environment of calling process.

an environment block consists of null-terminated block of null-terminated strings. each string in following form:

name=value\0

example:

// example storing environment variables dynamically std::map<std::string, std::string> env = { {"name1", "value1"}, {"name2", "value2"} };  // example generating block of strings std::vector<char> envblock; std::for_each(env.begin(), env.end(),     [&envblock](const std::pair<std::string, std::string> & p) {         std::copy(p.first.begin(), p.first.end(), std::back_inserter(envblock));         envblock.push_back('=');         std::copy(p.second.begin(), p.second.end(), std::back_inserter(envblock));         envblock.push_back('\0');     } ); envblock.push_back('\0');  // feed ::createprocess() lpvoid lpenvironment = (lpvoid)envblock.data();