Hanzhe Huang
10/6/2021
Project 2

Description:
This program manages n licenses and logs messages into the logfile through licensed child processes.
The command line stdin should contain lines in the format of "testsim int int", similarly to the example file testing.data.

Usage:
./runsim [n] < stdin

Example Usage:
./runsim 2 < testing.data

Files:
runsim.c, runsim.h, testsim.c, testing.data, makefile, logfile(optional), README

References:
https://www.tutorialspoint.com/inter_process_communication/inter_process_communication_shared_memory.htm
https://stackoverflow.com/questions/19461744/how-to-make-parent-wait-for-all-child-processes-to-finish
https://www.gnu.org/software/libc/manual/html_node/Example-of-Getopt.html
http://www.cs.umsl.edu/~sanjiv/classes/cs4760/src/shm.c
https://www.geeksforgeeks.org/signals-c-set-2/
https://www.geeksforgeeks.org/bakery-algorithm-in-process-synchronization/


Git Repository:
https://github.com/hhmz8/PJ2