Get the list of logged in users

Applications Programming
1

How can I get the list of logged in users in the system programmatically?
I can get the list with 'who' or 'users' commands but I need to get the list programmatically...
May someone help, please?

Thanks in advance.

2

Doing it without using who would be difficult. Just capture the output of who. Exactly how to do that would depend on what language you're using.

3

man utmp will explain how 'who' gets the list of logged on users from the utmp file.