[Solved] Operating Systems Laboratory (CS39002) Assignment 1

Assignment 1: Familiarization with Unix system calls on process creation and management

1a. Write a program in C/C++ under the Linux environment that would perform the following:

• Create five processes A, B, C, D, and E.
• The processes A, B and C will each generate 50 pseudo-random non zero integers. The processes A and B will forward the numbers in sorted order to process D (through pipes). The process C will forward the numbers in sorted order to process E (through pipes).
• The process D will read the numbers received from the two pipes in sorted order, merge them, and forward the numbers in sorted order to process E (through pipes).
• The process E will read the numbers received from the two pipes in sorted order, merge them, and print all the numbers in sorted order. Use pipes for inter process communication.

1b. Write a program in C/C++ under the Linux environment that would perform the following:

• In a loop, read a character string containing the name of an executable program with command line arguments, if any.
• Fork a child process, and execute the program. o The loop will terminate if the command quit is entered.

Submission Guidelines:

• Create two separate programs for the two assignments, and name them

Ass1_<groupno>_1a and Ass1_<groupno>_1b (replace <groupno> by your group number).

• You must show the running version of the program(s) to your assigned TA during the lab hours.

Things to study:

• fork() system call
• pipe() system call
• execlp() / execvp() / execve() system call

Evaluation Guidelines:

Total marks for this assignment are 25. While entering marks, the partwise break up should also be entered according to the marking guidelines given below.