Finding no of active users in FreeBSD 5.2.1

[potterv]

Hello evryone,

I was wondering how can we find the no. of active users in FreeBSD 5.2.1 Is there a way to do that? How can we implement it in source code?

 

[CodeBlock]

What do you mean number of active users? The number of people actually running 5.2? How would putting it in the source help that, if they refuse to upgrade to 7 what makes you think they would upgrade their kernel at all?

Or do you mean number of users on your system, in which case, `w` comes in handy.

 

[SirDice]

Both w(1) and who(1) come to mind.

 

[DutchDaemon]

[cmd=]last | awk '{print $1}' | grep -v -E '(^$|reboot|shutdown)' | sort -u | wc -l[/cmd]

for this month

 

[potterv]

Active users mean the number of users who are currently running atleast 1 process on the system. Can you tellmehow to do it inside the code. Do we have to assign a variable or something?

 

[DutchDaemon]

[cmd=]ps aux | awk '{print $1}' | sort -u | wc -l[/cmd]

 

[SirDice]

Active users mean the number of users who are currently running atleast 1 process on the system. Can you tellmehow to do it inside the code. Do we have to assign a variable or something?

What kind of code?

You can find the C source code for both commands here:
http://www.freebsd.org/cgi/cvsweb.cgi/src/usr.bin/w/
http://www.freebsd.org/cgi/cvsweb.cgi/src/usr.bin/who/

 

[anemos]

Can you tellmehow to do it inside the code.

I assume you mean C code, so, have a look at utmp(5).

As you may find out from the links provided by SirDice, w(1) and who(1), as well as users(1) use /var/run/utmp file to extract this info from the system.

 

[potterv]

Hey Guys,

I was thinking ...Can we write a sysctl statement inside w.c file so the number of users become a global variable and can be accessed system-wide.

If so, what will be the correct way?

Help!!

 

[SirDice]

I was thinking ...Can we write a sysctl statement inside w.c file so the number of users become a global variable and can be accessed system-wide.

Simple question, why?