0

I am using Ubuntu 14.04 and want to add a security feature to my system. From this question, I came to know how to take picture when an incorrect password entered in login screen, using the following script,

#!/bin/bash
ts=`date +%s`
ffmpeg -f video4linux2 -s vga -i /dev/video0 -vframes 3 /tmp/vid-$ts.%01d.jpg
exit 0  #important - has to exit with status 0

After making it executable, I am able to take pictures from my webcam with this script.

I have some confidential PDF documents which are password protected. Now I want to do the same thing again. I want to take picture, if someone attempts to open those files with incorrect password. How to do that?

0

You could accomplish this with Incron.

Install Incron sudo apt-get install incron and configure it with incrontab -e similar to adding regular cron jobs.

eg. /path/to/pdf/files/ IN_ACCESS /path/to/script.sh save and voila.

NOTE: Do not do any action from within a incron job in a directory that you monitor to avoid loops. Example: When you monitor the /tmp directory for changes and each change triggers a script that writes a log file in /tmp, this will cause a loop and might bring your system to high load or even crash it. - Quoted from https://www.howtoforge.com/tutorial/trigger-commands-on-file-or-directory-changes-with-incron/

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.