CentOS - Jan 2016 - Run cornjobs only when a user is logged

Hi all,

  Is it possible to run cronjobs configured by a user to run only when 
he/she is logged (via GDM/KDM,etc.)?

Thanks.

------------ Original Message ------------
> Date: Tuesday, January 05, 2016 11:26:01 +0000
> From: "C.L. Martinez" <carlopmart at gmail.com>
>
> Hi all,
> 
>   Is it possible to run cronjobs configured by a user to run only
> when he/she is logged (via GDM/KDM,etc.)?
> 
Seems a little antithetical, so you may want to provide more details
on what the issues are and what you are trying to accomplish. 

That said, the cron job being run could include a bit of code at the
top to check the user's logged in status and run or abort
accordingly.

A different approach would be to use cron.deny to keep a user from
setting up cron jobs, and instead have "at" jobs spawned when the
user logs in.

On 01/05/2016 12:36 PM, Richard wrote:
>
>
> ------------ Original Message ------------
>> Date: Tuesday, January 05, 2016 11:26:01 +0000
>> From: "C.L. Martinez" <carlopmart at gmail.com>
>>
>> Hi all,
>>
>>    Is it possible to run cronjobs configured by a user to run only
>> when he/she is logged (via GDM/KDM,etc.)?
>>
>
> Seems a little antithetical, so you may want to provide more details
> on what the issues are and what you are trying to accomplish.
>
> That said, the cron job being run could include a bit of code at the
> top to check the user's logged in status and run or abort
> accordingly.
>
> A different approach would be to use cron.deny to keep a user from
> setting up cron jobs, and instead have "at" jobs spawned when the
> user logs in.
>
Thanks Richard. I need to modify xrandr options for a nvidia graphics 
adapter depending which user is logged.

It could be easy using "Startup applications" under Gnome, but gamma 
settings are modified by the web browser or vlc...