Do not use Who command directly. Create your own who command close to in build WHO.

• Write a C program mywho whose behavior resembles that of the system command who as closely as possible. To decide what information in what format mywho should display, run the standard who command on your computer:

~$ who

CS355_u0 pts/2 2018-09-24 01:28 (24.123.66.134)

CS355_u0 pts/5 2018-09-24 02:34 (24.123.66.134)