Jamf Nation Community

ryan_panning · ‎02-22-2011

Ok, this is an offshoot of the other "Script Priority" topic I started
earlier today.

What I'd like to do is calculate what user has been logged into the
computer the longest. Not the last, most recent user. So far I have a
PHP script that processes the 'last' output and calculates the session
times, sorts it and gets the top user. From there, I do an LDAP lookup
to get the real user name, but that's already in Bash/sh. I'd have done
this all in Bash to start with but I'm more familiar with PHP.

So, to start out, I can get the data needed by calling this command. I'm
sure you understand this one, but just in case. "Last" is getting a list
of all computer/user sessions. "Grep" is getting just the
console/desktop sessions. And finally, "awk" is getting just the
columns/fields that I need.

last | grep console | awk '{print $1 " " $NF}'

ryan_panning · ‎02-22-2011

get the top most user. Using PHP (attached) I did this by a regex
pattern and such. I'm sure something similar could be done with Bash,
just not as familiar yet. Any input would be great. Thanks!

~ Ryan

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tlarkin · ‎02-22-2011

Casper keeps a complete list of the last log under the usage logs. Here is a snippet

Action

Who

Date

login 14devlov Wednesday, September 01 2010 at 7:28 AM

startup

Wednesday, September 01 2010 at 7:27 AM

login 14devlov Tuesday, August 24 2010 at 7:27 AM

startup

Tuesday, August 24 2010 at 7:26 AM

login 14devlov Saturday, August 07 2010 at 12:05 PM

startup

Saturday, August 07 2010 at 12:04 PM

startup

Thursday, July 22 2010 at 9:04 AM

login hadmin Wednesday, July 21 2010 at 3:40 PM

startup

Wednesday, July 21 2010 at 3:38 PM

startup

Wednesday, July 21 2010 at 3:16 PM

login 12jascor Tuesday, May 11 2010 at 11:00 AM

startup

Tuesday, May 11 2010 at 10:59 AM

login 12jascor Tuesday, May 04 2010 at 9:23 AM

startup

Tuesday, May 04 2010 at 9:21 AM

login 12jascor Thursday, April 29 2010 at 9:26 AM

How does this differ from what you are trying to accomplish here? You
want this to basically see the difference and time a user logs in versus
another?

--missing content--

get the top most user. Using PHP (attached) I did this by a regex
pattern and such. Iâ€™m sure something similar could be done with Bash,
just not as familiar yet. Any input would be great. Thanks!

~ Ryan

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</head> <body vlink"purple" link"blue" lang"EN-US"> Casper keeps a complete list of the last log under the usage logs.  Here is a snippet 
 <table> <tr>
 </tr> <tr valign"top"> <td background"images/sub.gif"> <table border"0" width"100%" cellpadding"0" cellspacing
"0"> <tr> <td background"images/column_header.gif" height"15"> <table border"0" width"100%" cellpadding"0" cellspacing"0"> <tr> <td nowrap"nowrap" align"center">  Action  </td> <td width"5">
 </td> </tr> </table> </td> </tr> </table> </td> <td background"images/sub.gif"> <table border"0" width"100%" cellpadding"0" cellspacing
"0"> <tr> <td background"images/column_header.gif" height"15"> <table border"0" width"100%" cellpadding"0" cellspacing"0"> <tr> <td width"10">
 </td> <td nowrap"nowrap" align"center">  Who  </td> <td width"5">
 </td> </tr> </table> </td> </tr> </table> </td> <td background"images/sub.gif"> <table border"0" width"100%" cellpadding"0" cellspacing
"0"> <tr> <td background"images/column_header.gif" height"15"> <table border"0" width"100%" cellpadding"0" cellspacing"0"> <tr> <td width"10">
 </td> <td nowrap"nowrap" align"center">  Date  </td> <td width"5">
 </td> </tr> </table> </td> </tr> </table> </td> </tr> <tr bgcolor"#ffffff"> <td>   login  </td> <td>  14devlov  </td> <td>  Wednesday, September 01 2010 at 7:28 AM  </td> </tr> <tr bgcolor"#eeeeee"> <td>   startup  </td> <td>    </td> <td>  Wednesday, September 01 2010 at 7:27 AM  </td> </tr> <tr bgcolor"#ffffff"> <td>   login  </td> <td>  14devlov  </td> <td>  Tuesday, August 24 2010 at 7:27 AM  </td> </tr> <tr bgcolor"#eeeeee"> <td>   startup  </td> <td>    </td> <td>  Tuesday, August 24 2010 at 7:26 AM  </td> </tr> <tr bgcolor"#ffffff"> <td>   login  </td> <td>  14devlov  </td> <td>  Saturday, August 07 2010 at 12:05 PM  </td> </tr> <tr bgcolor"#eeeeee"> <td>   startup  </td> <td>    </td> <td>  Saturday, August 07 2010 at 12:04 PM  </td> </tr> <tr bgcolor"#ffffff"> <td>   startup  </td> <td>    </td> <td>  Thursday, July 22 2010 at 9:04 AM  </td> </tr> <tr bgcolor"#eeeeee"> <td>   login  </td> <td>  hadmin  </td> <td>  Wednesday, July 21 2010 at 3:40 PM  </td> </tr> <tr bgcolor"#ffffff"> <td>   startup  </td> <td>    </td> <td>  Wednesday, July 21 2010 at 3:38 PM  </td> </tr> <tr bgcolor"#eeeeee"> <td>   startup  </td> <td>    </td> <td>  Wednesday, July 21 2010 at 3:16 PM  </td> </tr> <tr bgcolor"#ffffff"> <td>   login  </td> <td>  12jascor  </td> <td>  Tuesday, May 11 2010 at 11:00 AM  </td> </tr> <tr bgcolor"#eeeeee"> <td>   startup  </td> <td>    </td> <td>  Tuesday, May 11 2010 at 10:59 AM  </td> </tr> <tr bgcolor"#ffffff"> <td>   login  </td> <td>  12jascor  </td> <td>  Tuesday, May 04 2010 at 9:23 AM  </td> </tr> <tr bgcolor"#eeeeee"> <td>   startup  </td> <td>    </td> <td>  Tuesday, May 04 2010 at 9:21 AM  </td> </tr> <tr bgcolor"#ffffff"> <td>   login  </td> <td>  12jascor  </td> <td>  Thursday, April 29 2010 at 9:26 AM  </td> </tr> </table>
 How does this differ from what you are trying to accomplish here?  You want this to basically see the difference and time a user logs in versus another?</f
ont> >>> "Panning, Ryan" <Ryan.Panning at dis
trict196.org> 2/22/2011 3:18 PM >>> <div class"wordsection1"> Ok, this is an offshoot of the other “Script Priority” topic I started earlier today.<o p"#DEFAULT"></o> <o p"#DEFAULT">  </o> What I’d like to do is calculate what user has been logged into the computer the longest. Not the last, most recent user. So far I have a PHP script that processes the ‘last’ output and calculates the session times, sorts it and gets the top user. From there, I do an LDAP lookup to get the real user name, but that’s already in Bash/sh. I’d have done this all in Bash to start with but I’m more familiar with PHP.<o p"#DEFAULT"></o> <o p"#DEFAULT">  </o> So, to start out, I can get the data needed by calling this command. I’m sure you understand this one, but just in case. “Last” is getting a list of all computer/user sessions. “Grep” is getting just the console/desktop sessions. And finally, “awk” is getting just the columns/fields that I need.<o p"#DEFAULT"></o> <o p"#DEFAULT">  </o> last | grep console | awk '{print $1 " " $NF}'<o p"#DEFAULT"></o> <o p"#DEFAULT">  </o> From there, I need to add each users session time, sort the totals, and get the top most user. Using PHP (attached) I did this by a regex pattern and such. I’m sure something similar could be done with Bash, just not as familiar yet. Any input would be great. Thanks! <o p"#DEFAULT">  </o> ~ Ryan<o p"#DEFAULT"></o> </div>

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ernstcs · ‎02-22-2011

Not exactly the same thing...

We actually have scripts that run at login and logout that curl data to a webpage that then places the data into a separate MySQL schema. We can then use this data for determining lab usage, unique logins and number of them. Could use it for duration if we wanted to. It's also used for another system that allows students to find available lab computers.

Not sure if a whole new system is what you're after, but it works well here. I'd share the scripts if there is interest.

Don't recall what would work for this that already exists in the JSS.

ryan_panning · ‎02-22-2011

Alright, end goal, to populate a computers Username and Real Name in Casper. We have policies setup to schedule Recon to run once per month. Right now the policies just have the Update Inventory checked in the Advanced tab. I would change this to instead run the command `jamf recon –endUsername “<<from script>>” –realname “<<from script>>”`.

In education, most computers are going to be used by several users. But the teacher computers are mostly used by, well, the teachers. But, students may login to the computer as well. In this case the student may be the “last” user but it’s really the teachers computer. That’s why a proper calculation would be better.

So my thoughts are, run a script to do the calculation. Then set the username and realname in temporary files so that the jamf recon command can `cat /private/tmp/user_name.txt`, get the username and realname from those temporary files.

~ Ryan

ryan_panning · ‎02-22-2011

That sounds like a good idea for gauging computer usage. But we're just
looking to populate the field in Casper to help with inventory searches
and have the name show up in Remote. Mainly things in Casper. Thanks for
the offer though.

~ Ryan

rmanly · ‎02-24-2011

I just broke myself of the bad habit after many years, lol...but you
should almost never need to have grep and sed or awk in same line.

last | awk '/console/{print $1 " " $NF}'

Saves you from spawning an additional subshell.

Ryan M. Manly
Glenbrook High Schools

funny link = http://partmaps.org/era/unix/award.html#grep

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Script to Analyze 'last' Data