How return a std::string from C's “getcwd” function

Question

Sorry to keep hammering on this, but I\'m trying to learn :). Is this any good? And yes, I care about memory leaks. I can\'t find a decent way of preallocating the char*, be

Answer 1

How about this? It's short, exception safe, and doesn't leak.

std::string getcwd() {
    std::string result(1024,'\0');
    while( getcwd(&result[0], result.size()) == 0) {
        if( errno != ERANGE ) {
          throw std::runtime_error(strerror(errno));
        }
        result.resize(result.size()*2);
    }   
    result.resize(result.find('\0'));
    return result;
}