How to get a full path of a process with C language

Source: Internet
Author: User
Tags exit command line

A process's command line is saved in file/proc/pid/cmdline, and the parameters are delimited by byte 0. The following applet shows an example of how to read this file.

#include <iostream>
#include <fstream>

int main(int argc, char* argv[]) {
  if(argc != 2) {
    printf("usage: %s pid ", argv[0]);

  std::string path(argv[1]);
  path = "/proc/" + path + "/cmdline";
  std::ifstream fin(path.c_str());
  if(!fin) {
    std::cout << "Open /proc/" << argv[1] << "/cmdline failed! ";
  std::string s;
  while (getline(fin, s, ''))
    std::cout << s << std::endl;

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