main.cpp

#include <iostream>
#include <unistd.h> // For fork(), execlp()
#include <sys/wait.h> // For waitpid()
#include <ctime>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <queue>
#include <signal.h>
using namespace std;
int shmid;
int* SharedData;
   
void displayMenu() {
    // ANSI escape codes for colors
    const string red = "\033[1;31m";
    const string reset = "\033[0m";

    // Get current time
    time_t now = time(0);
    char* timeStr = ctime(&now);

    // Display menu with red-colored text
    cout << red << "============================================" << endl;
    cout << red << "*                                          *" << endl;
    cout << red << "*        Welcome To My OS            *" << endl;
    cout << red << "*                                          *" << endl;
    cout << red << "============================================" << endl;
    cout << red << "*                                          *" << endl;
    cout << red << "*    Member: Zain                *" << endl;
    cout << red << "*    Roll No: 20F-1038                    *" << endl;
    cout << red << "*                                          *" << endl;
    cout << red << "*    Current Date: " << timeStr << red << endl; // Display current date
    cout << red << "*                                          *" << endl;
    cout << red << "============================================" << reset << endl;
}




//Checking Available Resources
/*void displayAvailableResources() {
    cout << "Available Resources:" << endl;
    cout << "1. Memory: " << resources.availableMemory << " MB" << endl;
    cout << "2. Hard Disk Space: " << resources.availableHardDiskSpace << " MB" << endl;
    cout << "3. Number of Cores: " << resources.availableNumCores << endl;
}*/


// Function to create processes
void Create_Processes(const string& filename) {
    
    // Fork a new process
    pid_t pid = fork();

    if (pid == -1) {
        cout << "Failed to fork process" << endl;
        return;
    } else if (pid == 0) {

        // Execute the compiled binary
        //if (execlp("./" + filename, ("./" + filename).c_str(), NULL) == -1) {
            //cout << "Failed to execute " << filename << endl;
            

            
             if (execlp("gnome-terminal", "gnome-terminal", "--", "bash", "-c", ("./" + filename + "; exec bash").c_str(), NULL) == -1) {
            cout <<"Failed to execute " << filename << " in a new terminal" << endl;
            return;
        }
    } else {
        // Parent process
        cout << "Process created successfully with PID: " << pid << endl;
        
        // Wait for the child process to terminate
        int status;
    
        
        
        
        if (WIFEXITED(status)) {
            cout << "Child process exited with status: " << WEXITSTATUS(status) << endl;
        } else {
            cout << "Child process terminated abnormally" << endl;
        }
    }
}
void Interrupt(int signum) {
    cout << "Terminating All Tasks!" << endl;
    exit(EXIT_SUCCESS);
}
void shutdown() {
    cout << "Shutting down the system..." << endl;
    system("shutdown now");
}
void clearScreen() 
{
    system("clear");
}
int main() {
   
    int choice4;
    cout << "1. Kernel Mode\n";
    cout << "2. User Mode\n";
    cout << "Enter Choice: ";
    cin >> choice4;

    if (choice4 != 2) {
        cout << "This is Kernel Mode\n";
        cout << "Do you want to shut down? (y/n): ";
        char shutdownChoice;
        cin >> shutdownChoice;
        if (shutdownChoice == 'y' || shutdownChoice == 'Y') {
            shutdown();
        }
    }

    else
    {

 signal(SIGINT, Interrupt);
    // Path to the .cpp file to execute
       string filename="m";
      char choice,choice2,choice1;
       queue<string> processQueue;
       
    //cout << "Enter the name of the .cpp file to execute: ";
    //cin >> filename;
    //Create_Processes(filename);

       //Display OS Name
       displayMenu();
      sleep(2);
      
  int Memory,HardDiskSpace,NumCores;
        cout << "Enter available memory (in MB): ";
    cin >> Memory;
    cout << "Enter available hard disk space (in MB): ";
    cin >> HardDiskSpace;
    cout << "Enter available number of CPU cores: ";
    cin >> NumCores;
    
     int shmid = shmget((key_t)8749, sizeof(SharedData), IPC_CREAT | 0666);
    if (shmid == -1) {
        perror("Failed!");
        return 0;
    }

    // Attach the shared memory segment
    SharedData = (int*)shmat(shmid, NULL, 0);
    if (SharedData == (int*)(-1)) {
        perror("Failed To Attach!\n");
        return 0;
    }
    
     *SharedData=Memory;
     
do {
        clearScreen();
        // cout<<*SharedData<<"Fun\n";
        // Display main menu
        cout << "Welcome to the Main Menu" << endl;
        cout << "1. Text Editor" << endl;
        cout << "2. Calculator" << endl;
        cout << "3. Check Available Resources" << endl;
        cout << "4. Mini Games" << endl;
        cout << "5. Exit" << endl;
        cout << "Enter your choice: ";
        cin >> choice;

        switch(choice) {
        //Text Editor Menu
            case '1':
               { 
                do {
            //clearScreen();

                 cout << "Welcome to Text Editor" << endl;
                cout << "1. Create New File" << endl;
                cout << "2. Write File" << endl;
                cout << "3. Read File" << endl;
                cout << "4. Show Graphics" << endl;
                cout << "5. Exit" << endl;
                cout << "Enter your choice: ";
                cin >> choice1;
                //Inner Choice For File Editor
                switch(choice1) {
            case '1':
                {   
    
                     filename = "CreateFile";
                      processQueue.push(filename);
                      while (!processQueue.empty()) {
        string filename2 = processQueue.front();
        processQueue.pop();
        
        // Create process for the filename
        Create_Processes(filename2);
    }
                     break;
               }
            case '2':
            {   filename = "Write";
                     
                processQueue.push(filename);
                      while (!processQueue.empty()) {
                string filename2 = processQueue.front();
                processQueue.pop();
            // Create process for the filename
             Create_Processes(filename2);
              }
                break;
            }
             case '3':
            {  
                      filename = "Read";
                     
                processQueue.push(filename);
                      while (!processQueue.empty()) {
                string filename2 = processQueue.front();
                processQueue.pop();
            // Create process for the filename
             Create_Processes(filename2);
              }
                break;
            }
             case '4':
            {  
                      filename = "gp";
                     
                processQueue.push(filename);
                      while (!processQueue.empty()) {
                string filename2 = processQueue.front();
                processQueue.pop();
            // Create process for the filename
             Create_Processes(filename2);
              }
                break;
            }
              case '5':
               { 
                  cout << "Exiting the program. Goodbye From Mini Games!" << endl;
                  break;
               }
            default:
               { 
                 cout << "Invalid choice in Mini Games Selection. Please try again." << endl;
                break;
                
                }
            }
          }while(choice1 != '5');         
                break;
                //End of Text Editor
                
              }
            case '2':
              {   clearScreen();
                  
                       filename = "Calculator";
                     
                processQueue.push(filename);
                      while (!processQueue.empty()) {
                string filename2 = processQueue.front();
                processQueue.pop();
             Create_Processes(filename2);
              }
                break;
              }
            case '3':
              {  clearScreen();
               filename = "MemoryInfo";
                    processQueue.push(filename);
                      while (!processQueue.empty()) {
                string filename2 = processQueue.front();
                processQueue.pop();
             Create_Processes(filename2);
              }
                break;
              }
            case '4':
            {
            do {
            clearScreen();

                 cout << "Welcome to the Mini Games" << endl;
                cout << "1. Tic Tac Toe" << endl;
                cout << "2. Bingo" << endl;
                cout << "3. Exit" << endl;
                cout << "Enter your choice: ";
                cin >> choice2;
                //Inner Choice
                switch(choice2) {
            case '1':
                {   
                     filename = "TicTac";
                       processQueue.push(filename);
                      while (!processQueue.empty()) {
                string filename2 = processQueue.front();
                processQueue.pop();
            // Create process for the filename
             Create_Processes(filename2);
              }
                     break;
               }
            case '2':
            {   filename = "Bingo";
                     processQueue.push(filename);
                      while (!processQueue.empty()) {
                string filename2 = processQueue.front();
                processQueue.pop();
            // Create process for the filename
             Create_Processes(filename2);
              }
                break;
            }
              case '3':
               { 
                  cout << "Exiting the program. Goodbye From Mini Games!" << endl;
                  break;
               }
            default:
               { 
                 cout << "Invalid choice in Mini Games Selection. Please try again." << endl;
                break;
                
                }
            }
          }while(choice2 != '3');
          break;
          }
            case '5':
               { cout << "Exiting the program. Goodbye!" << endl;
                break;
              }
            default:
               { cout << "Invalid choice. Please try again." << endl;
                break;
                
                }
        }

        if (choice != '5') {
            cout << "\nPress Enter to return to the main menu...";
            cin.ignore();
            cin.get();
        }
    
    filename="";
    } while(choice != '5');

}
    return 0;
}