Sources/opsys.cpp

   1 #include "Headers/opsys.h"
   2
   3 OpSys OS;       // Global OpSys variable. Should be accessible to all modules.
   4
   5 void signal_handler(int s)
   6 {
   7     if (s==SIGINT)
   8     {
   9         cout << "\nSIGINT (Ctrl+C) received. Code " << s << ". Exiting.\n";
  10         exit(s);
  11     }
  12
  13     if (s==SIGHUP)
  14     {
  15         cout << "\nSIGHUP received. Code " << s << ". Exiting.\n";
  16         exit(s);
  17     }
  18 }
  19
  20 SignalHandler::SignalHandler()
  21 {
  22     signal_action.sa_handler = signal_handler;
  23     sigemptyset(&signal_action.sa_mask);
  24     signal_action.sa_flags = 0;
  25     sigaction(SIGINT, &signal_action, NULL);
  26 }
  27
  28 string OpSys::get_cwd()
  29 {
  30     char temp[MAXPATHLEN];
  31     return getcwd(temp, sizeof(temp)) ? std::string( temp ) : std::string("");
  32 }
  33
  34 void OpSys::change_dir(vector<string> command)
  35 {
  36     string cmd = "";
  37     for(unsigned short int i = 1; i < command.size(); i++)
  38     {
  39         cmd += command[i];
  40     }
  41     if (chdir(cmd.c_str()))
  42     {
  43         cerr << "miniShell: cd: " << cmd << ": Arquivo ou diretório não encontrado\n";
  44     }
  45     else {
  46         get_cwd();
  47         cwd_changed = true;
  48     }
  49 }
  50
  51 OpSys::OpSys()
  52 {
  53     cwd = get_cwd();
  54     if(cwd.empty())
  55         cerr << RED_ANSI << "Could not get the current working directory.\n" << RESET_ANSI;
  56
  57     uid_t uid = geteuid();             // Gets the effective ID of the user that started miniSHELL
  58     struct passwd pwent;
  59     struct passwd *pwent_ptr;
  60     char buffer[1024];
  61
  62         // Looks for the UDI on the password databank and saves the result on pwent
  63     getpwuid_r(uid, &pwent, buffer, sizeof buffer, &pwent_ptr);
  64     username = pwent.pw_name;   // Saves username
  65
  66     char hostname[64];
  67     gethostname(hostname, 64);
  68     this->hostname = hostname;
  69 }