Ask Question, Ask an Expert


Ask C/C++ Expert

Home >> C/C++

“Base to Bombardier”
In this lab, each student is to prepare a single program called prog9.c which has a “base process” which communicates with child processes acting as “bombers” that it creates. The student specifically explores:
• Handling processes by use of fork(), getpid()and wait()
• Handling signals by use of signal(),alarm()and kill()
• Opening and accessing a console window buffer
Before executing the program, the user should open four console (terminal) windows.
The first terminal window will represent the base, and the other three will represent the three bombers.
The first action of the program’s main loop is to discover how many terminals are open by trying to open all possible terminal number buffers (e.g. /dev/pts/1,/dev/pts/1 etc…) as a read only file.
Those that are open should be stored so that the first four found can be written to.
The main function of the air base is use fork() to spawn three child bomber processes which are to execute the same exact code, and a fourth child (without an associated terminal window) to receive input and while monitoring and signaling the bombers.
Each bomber is to be initialized to contain 50 gallons of fuel, six bombs, and to be a distance of zero miles from the base. An alarm() timer is to be installed and used which:
• Decrements the fuel by two gallons each second.
• Increments the distance from base by one mile every two seconds if going toward target, and decrements the distance from base by one mile every two seconds if returning to base.
• Reports the fuel amount, ordinance left, and distance from base every three seconds in the appropriate terminal. e.g. Bomber id to base, g gallons left, b bombs left, m miles from base.

System Programming Concepts
If a bomber ever runs out of fuel it should be terminated by exiting with an unsuccessful code. If a bomber drops its entire payload, it should begin returning to base. If it makes it back to base without running out of fuel, it should terminate with a successfully code.
The program should accept the following input (where invalid commands should produce a suitable error message):
• bn – Orders plane n (n = 1 to 3) to drop a bomb.
• rn – Refuels plane n’s fuel tank to 50 gallons.
• kn – Terminates (kills) the plane n process.
• q – Exits the program.
Given the bn command, the base should send the signal SIGUSR1 to plane n. Upon receiving the signal SIGUSR1, the plane should print out that it (plane n) has dropped a bomb and then print how many bombs it has left. When the plane has no more bombs left, it should print that it has no more ordinance left and that it is returning to base.
Given the rn command, the base process should send the signal SIGUSR2 to plane n. Upon receiving the signal SIGUSR2, a plane should refuel, resetting its fuel value to 50 gallons. Whenever a plane’s fuel drops below 5 gallons, it should print the message “Mayday, mayday!” If a plane uses all its fuel before being refueled, the plane should send the signal SIGUSR2 to the base, print the message “Bomber n down. Pick us up in the drink.” and then exit. The base should respond with “Vaya Con Dios, Flight n” in its terminal window.
Given the kn command, the base should terminate the selected child process and note such in its terminal. Given the q command, the base should terminate all child processes and close the program.

C/C++, Programming

  • Category:- C/C++
  • Reference No.:- M91629

Have any Question? 

Related Questions in C/C++

Write a program to draw a symmetric shape of your own using

Write a program to draw a symmetric shape of your own using C++ user-defined functions and arrays. The program should draw a shape in its original and opposite forms (black and white and then white and black). Please con ...

Write a program that reads numbers from cin and then sums

Write a program that reads numbers from cin and then sums them, stopping when 0 has been entered. Construct three versions of this program, using the while, do - while , and for loops. Add the following to your program: ...

Programming assignmentwrite a c program that allows the

PROGRAMMING ASSIGNMENT Write a C program that allows the user to make some banking transactions. The program should first prompt the user to enter the current balance of his/her bank account (in dollars and cents). The p ...

Computer scienceyou have gathered your information on the

Computer Science You have gathered your information on the AI for the Tic-Tac-Toe game and began to develop your own ways to improve it using C++. Now, it's time to present your findings in a final paper. Remember that y ...

Assignmentthis is the programthis program will use 2

Assignment This is the program: This program will use 2 different data structures to perform the same tasks; a vector and a dynamically sized array Write a complete C++ program that will: Declare a vector of integers wit ...

Assignmentthis assignment gives you the opportunity to

Assignment This assignment gives you the opportunity to practice array of pointers, linked lists and self referential structures. Write a program that initializes two parallel arrays as follows: char * String[] = { "Abbi ...

Intro to programming in c programming assignmentassignment

Intro to Programming in C Programming Assignment Assignment purpose: User defined functions, pointers, Menu driven program A Company needs to create software for their new line of phone applications. Customers will have ...

Discussionkeyboard versus file input please respond to the

Discussion "Keyboard versus File Input" Please respond to the following: • Suppose you are designing a C++ application that needs to capture user input specifically via a keyboard or from a file. Determine the method tha ...

Write a c application that does the followingitem 1 prompts

Write a C++ application that does the following: ITEM 1: Prompts the user to choose one of the following series: 1 + 1/2 + 1/3 + ... + 1/n ((((x * 2) * 2) * ...) * 2) series of n multiplications x + (x * 1) + (x * 2) + ( ...

Design implement test and debug a c program to simulate the

Design, implement, test, and debug a C# program to simulate the rolling of two dice 100 times. Whenever the two dice display the same number, the program should show the roll sequence number (e.g. the 10th roll) and the ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen