Description
PART 1 Simple Command Interpreter
Write a special simple command interpreter that takes a command and its arguments. This interpreter is a program where the main process creates a child process to execute the command using exec() family functions. After executing the command, it asks for a new command input ( parent waits for child). The interpreter program will get terminated when the user enters exit.
Example:
./interpreter
command: pwd
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output command: ls -la
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output command: date
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output
command: ls -lr /foldername
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output
command: tail /etc/passwd | grep username
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output
command: ps -u username | grep firefox
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output
command: cat /etc/passwd
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output command: exit
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terminates the program.
PART 2 Average Grade Calculator
There are n (n>1) students enrolled in a course. The course covers x number of chapters from a textbook (x > 1).
In each chapter y number of homeworks are assigned (y>=1). The average grade for each homework in all the chapters need to be found out.
To solve this, write program which has the main process as Director process, which reads a file containing grades of all homeworks of all chapters and creates x number of Manager processes. Each Manager process will take care of solving a chapter. Each manager process will create y number of Worker process and pass marks of n students to each of them and they calculate and print the average.
The input file should contain the data according to the value of x and y and n. For example, the input text file and the process tree for x = 2 and y = 2 and n= 10 will look like the following:
|
X1Y1 |
X1Y2 |
X2Y1 |
X2Y2 |
|
|
Student1 |
19 |
17 |
20 |
18 |
|
Student2 |
9 |
6 |
10 |
9 |
|
Student3 |
12 |
11 |
10 |
6 |
|
Student4 |
3 |
7 |
9 |
10 |
|
Student5 |
0 |
5 |
8 |
6 |
|
Student6 |
15 |
13 |
15 |
15 |
|
Student7 |
20 |
18 |
18 |
16 |
|
Student8 |
17 |
19 |
19 |
18 |
|
Student9 |
13 |
15 |
14 |
12 |
|
Student10 |
10 |
13 |
18 |
15 |
|
Output: |
avg |
avg |
avg |
avg |
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All the programs MUST be clearly indented and internally documented
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Make sure your programs compile and run without any errors
• Only include c files or txt files for submission. Do not include any executables.
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Save all your programs with meaningful names and zip into a single folder as: Lab4_[your last name here].zip (e.g., Lab4_Xyz.zip)
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Email your code with the subject line, “Task4-CSC33200–Section 6X(41557)-lastname“
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Email: sdebnath@ccny.cuny.edu
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