The shell script
This topic covers the steps required to replace a login shell with a customized script.
The shell script accepts the information on the command line and parses it, assigning values as needed to start the application. The application name is matched in a case statement, preventing direct execution of what the user sends.
The script provided
later in this section is intended to be an example, and we
expect you to tailor it according to your needs. Save it in a location
where it can be executed but not changed by your users. Edit the /etc/passwd
file to make a user call the script instead of a shell. Here is an
example of the user "user1" running the script named "gdcstart".
user1:x:569:569::/home/user1:/home/user1/gdcstartThe script LOGIN_SCRIPT is designed to recognize the difference between being started from sshd or from telnetd. You could modify it to handle either condition differently. For example, you may want it to start an application in text mode when accessed via telnet, or in GUI mode when accessed via ssh.