Alternative way to obtain argc and argv of a process

Question

I'm looking for alternative ways to obtain the command line parameters argc and argv provided to a process without having direct access to the variables passed into main().

I want to make a class that is independent of main() so that argc and argv don't have to be passed explicitly to the code that uses them.

EDIT: Some clarification seems to be in order. I have this class.

class Application
{
  int const argc_;
  char const** const argv_;

public:
  explicit Application(int, char const*[]);
};

Application::Application(int const argc, char const* argv[]) :
  argc_(argc),
  argv_(argv)
{
}

But I'd like a default constructor Application::Application(), with some (most probably) C code, that pulls argc and argv from somewhere.

Answer 1

On Linux, you can get this information from the process's proc file system, namely /proc/$$/cmdline:

int pid = getpid();
char fname[PATH_MAX];
char cmdline[ARG_MAX];
snprintf(fname, sizeof fname, "/proc/%d/cmdline", pid);
FILE *fp = fopen(fname);
fgets(cmdline, sizeof cmdline, fp);
// the arguments are in cmdline