CECS 326-01 Assignment 1 SOLVED

CECS 326-01 Assignment 1 (10 points)


This assignment has two parts.  The program done in Part 1 will be needed in Part 2.

 

This assignment is about process creation and coordination using fork(), exec(), and wait() system calls, and commandline arguments on Linux.  Syntax of these system calls and their use can be found using the man pages on Linux by typing the following command:

 

man fork (or any other system call of interest)

 

Part 1

 

Write a C++ program to be named child.cpp and compiled into executable child.  Run child with the command as follows:

 

./child child_number name_of_child

 

child will behave as follows:

1.       receives a child number and the child’s name

2.       outputs “I am child number x, and my name is xxxxxx.”                 

(Note: content of output depends on data received from the command line arguments.)

3.       Exits

 

For example, the command below

 

./child 2 Mary

 

should produce an output line

 

I am child number 2, and my name is Mary.

 

Part 2

 

Write a second C++ program to be named parent.cpp and compiled into executable parent. Run parent as follows:

 

./parent name_1 name_2 … name_k                                                                                                                                              

 

parent will behave as follows:

1.       takes in the list of names from the commandline arguments

2.       creates as many child processes as there are in the name list and have the child process execute the child executable from Part 1, and passes to each child process a child number and a name of that child

3.       waits for all child processes to terminate

4.       outputs “All child processes terminated. Parent exits.” And terminates.

 

Each child process invoked by parent will behave as described in Part 1.

 

Sample run

 

To invoke the execution:

./parent Nancy Roberto Joseph

 

parent process does the following:

1.       outputs “I have 3 children.”  -- Note: the number 3 comes from the number of names in the commandline arguments

2.       creates 3 child processes, and have each execute child and passes to it an integer that represents the child number and the next name from the name list in the commandline arguments

3.       waits for all child processes to terminate, then

4.       outputs “All child processes terminated. Parent exits.”

 

Output from child processes (It should be noted that the order of child’s output may vary.)

From first child process:

I am child number 1, and my name is Nancy.

From second child process:

I am child number 2, and my name is Roberto.

From third child process:

I am child number 3, and my name is Joseph.

 

Output from parent process

I have 3 children.

All child processes terminated. Parent exits.

 

Submit on Convas the following:

1.     The source programs parent.cpp and child.cpp; 

2.     A screenshot that shows successful compilation of child.cpp to child and a successful run of child for Part 1;

3.     A screenshot that shows successful compilation of parent.cpp to parent and a successful run of parent for Part 2; and 

4.     A cover page that provides your name, your student ID, course # and section, assignment #, due date, submission date, and a clear program description detailing what the programs are about.  Format of the cover page should follow the cover page template posted on Canvas.  

5.     The programs must be properly formatted and adequately commented to enhance readability and understanding.  Detailed documentation on all system calls are especially needed.