#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <vector>
#include <string>
#include <iostream>
#include <fstream>

using namespace std;


bool is_number(const string& s)
{
    std::string::const_iterator it = s.begin();
    while (it != s.end() && std::isdigit(*it)) ++it;
    return !s.empty() && it == s.end();
}

int main()
{
	DIR *dir;
	struct dirent *ent;

	if ((dir = opendir ("/proc")) != NULL)
	{
		/* print all the files and directories within directory */
		while ((ent = readdir (dir)) != NULL)
		{
			 char *s = ent->d_name;
			 // Check to see if the directory is for a process
			 if (is_number(s))
			 {
				 // Read from cmdline and print to console
				 char *cmdLinePath = "/proc/";
				 strcat(cmdLinePath, s);
				 strcat(cmdLinePath, "/cmdline");
				 ifstream myfile (cmdLinePath);
				 string line;
				 if (myfile.is_open())
				 {
					 cout << "File is open" <<endl;
					while ( getline (myfile,line) )
					{
						cout << line << '\n';
					}
				 }
				 myfile.close();
				 cout << "A Process" << endl;
			 }
			 cout << s << endl;
		}
		closedir (dir);
	} else {
		/* could not open directory */

	}
	return 0;
}