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Old 02-12-2005, 11:45 AM   #1
Ephracis
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Registered: Sep 2004
Location: Sweden
Distribution: Ubuntu, Debian
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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.
 
Old 02-12-2005, 05:31 PM   #2
homey
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Registered: Oct 2003
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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
 
Old 02-24-2006, 08:46 AM   #3
habrys
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Registered: Feb 2006
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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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