How to implement readlink to find the path

Question

Using the readlink function used as a solution to How do I find the location of the executable in C?, how would I get the path into a char array? Also, what do the variables buf and bufsize represent and how do I initialize them? EDIT: I am trying to get the path of the currently running program, just like the question linked above. The answer to that question said to use readlink("proc/self/exe"). I do not know how to implement that into my program. I tried: char buf[1024]; string var = readlink("/proc/self/exe", buf, bufsize); This is obviously incorrect. JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

This Use the readlink() function properly for the correct uses of the readlink function. If you have your path in a std::string, you could do something like this: #include #include std::string do_readlink(std::string const& path) { char buff[PATH_MAX]; ssize_t len = ::readlink(path.c_str(), buff, sizeof(buff)-1); if (len != -1) { buff[len] = '\0'; return std::string(buff); } /* handle error condition */ } If you're only after a fixed path: std::string get_selfpath() { char buff[PATH_MAX]; ssize_t len = ::readlink("/proc/self/exe", buff, sizeof(buff)-1); if (len != -1) { buff[len] = '\0'; return std::string(buff); } /* handle error condition */ } To use it: int main() { std::string selfpath = get_selfpath(); std::cout << selfpath << std::endl; return 0; }