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Top Forums Shell Programming and Scripting auto encryption and decryption of files during log in and log off Post 302707751 by Don Cragun on Saturday 29th of September 2012 10:09:58 PM
Old 09-29-2012
I don't think I want to help you try to write a script like this, but here are a few issues to consider if you really want to pursue this project:
  1. What constitutes "was working upon during logg (sic) off"? (Open in an editor? If so, do you have a list of editors to be used for this purpose?)
  2. What encryption/decryption tools do you plan to use that don't need user interaction to enter an encryption/decription key?
  3. How do you plan to determine that a file is a text file? (File extension of ".txt", file utility contains "text" in the output it produces when processing the file as an operand, ...?)
  4. How do you plan to keep from corrupting files if a user is logged in twice and logs out of one session while continuing to process files in another login session?
  5. Do you have any plan on a way to recover from a power failure that occurs while some users are logged in (or even worse; while one or more users were in the process of logging in or out)?
  6. If a sysadmin is editing a system configuration file when being logged out (such as /etc/passwd or /etc/group) and you encrypt those files as that user logs out, no one will be able to login after that until those files are restored. If any users edit files shared with other people working on a common project, you will have destroyed the ability to share files.

Good luck,
Don
 

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grablogs.conf(4)						   File Formats 						  grablogs.conf(4)

NAME
grablogs.conf - grablogs configuration for libgrablogs.so of the plugins of gnome-system-log file SYNOPSIS
/usr/lib/gnome-system-log/plugins/grablogs.conf DESCRIPTION
The libgrablogs.so is a plugin for gnome-system-log(1), it colloct the log files from the system as many as possible. grablogs.conf is a configuration file that contains a set of lines mixed with sh(1) syntax codes and individual log files. libgrablogs.so will read the file try to get a log files list for gnome-system-log(1). Users can copy the file into $HOME/.gnome2/gnome-system-log/plugins/`uname -p` to overwrite the system default one. The grablogs.conf file contains the following configuration categories: [configs] Each line under this category is interpreted as a config file of System. The plugin will open the config file and try to find all system paths of the logs. [commands] Each line under this category is interpreted as a shell command and will be execute through a pipe. And each line of the out- put of the command will be interpreted as a log path. [logs] Each line under this category is interpreted as a log path. FILES
/usr/lib/gnome-system-log/plugins/grablogs.conf The system default configuration file for the plugin libgrablogs.so $HOME/.gnome2/gnome-system-log/plugins/`uname -p`/grablogs.conf The user specific configuration file for the plugin libgrablogs.so EMAMPLE
[configs] /etc/syslog.conf [commands] for i in `svcs -aH -o FMRI | grep -v lrc `; do svcprop -p restarter/logfile $i 2>/dev/null || svcprop -q -p restarter/alt_logfile $i 2>/dev/null ; done [logs] /var/log/messages /var/log/secure /var/log/maillog /var/log/cron /var/log/Xorg.0.log /var/log/XFree86.0.log /var/log/auth.log /var/log/cups/error_log SEE ALSO
gnome-system-log(1), pipelog.conf(1) gnome-utils 2.16.0 13 Oct 2006 grablogs.conf(4)
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