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Ephracis

02-12-2005 11:45 AM

Taking auto screenshots using cronjobs

I want to let crond run the import-command to take automatic screenshots. But that makes me end up with the error:

Code:

import: unable to open X server `'.

I understand why I am getting this but I hoped that there is some way to have a cron that can use X.

homey

02-12-2005 05:31 PM

Maybe you would have better luck using xwd which then has to be converted to jpg.....

Code:

#!/bin/bash

#stop time max is 2359

stop=1835

echo "Stop at  $stop"

now=`date +%k%M`



while [ $now -lt $stop ] ; do



  let num=$num+1

  

  # /usr/bin/import -window root image$num.jpg

  

  /usr/bin/X11/xwd -display :0 -root >image$num.xwd

  /usr/bin/convert image$num.xwd image$num.jpg

  

  #set the sleep time in seconds

  sleep 20

  now=`date +%k%M`

  

done



rm -f *.xwd

#this gets rid of the xwd files

habrys

02-24-2006 08:46 AM

Quote:

Originally Posted by Ephracis

I want to let crond run the import-command to take automatic screenshots. But that makes me end up with the error:

Code:

import: unable to open X server `'.

I understand why I am getting this but I hoped that there is some way to have a cron that can use X.

Hmmm... it actually works on my machine. I had explicitly say, which display I want to use - DISPLAY variable is not available for crond.

Like this:

import -display :0.0 -window root screenshot.jpg

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