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Full Discussion: FreeBSD new user login script
Top Forums Shell Programming and Scripting FreeBSD new user login script Post 302570590 by Chubler_XL on Thursday 3rd of November 2011 05:39:49 PM
Old 11-03-2011
This migh be a good start, but you probably want to research what login does (eg running /etc/profile and the like).

Code:
#!/bin/bash
trap 'exit 0' 1 2 3 15
printf "Username: "
read touser
trap - 1 2 3 15
if [ "$touser" = "new" ]
then
    echo "Create a new user account here"
else
    exec su - $touser
fi

The create of user account stuff is usually pretty system specific but you should aim at using system tools (eg adduser).

It dosn't seem like security is of a major concern here, but you should test well to ensure the user can't break out into a root shell from the createuser part of the script (for example using CTRL-C at a prompt).
This User Gave Thanks to Chubler_XL For This Post:
deshi
 

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LEARN ABOUT LINUX

chsh

CHSH(1) 							   User Commands							   CHSH(1)

NAME

       chsh - change login shell

SYNOPSIS

       chsh [options] [LOGIN]

DESCRIPTION

       The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
       the login shell for her own account; the superuser may change the login shell for any account.

OPTIONS

       The options which apply to the chsh command are:

       -h, --help
	   Display help message and exit.

       -s, --shell SHELL
	   The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.

       If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
       value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.

NOTE

       The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
       and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
       in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
       back to its original value.

FILES

       /etc/passwd
	   User account information.

       /etc/shells
	   List of valid login shells.

       /etc/login.defs
	   Shadow password suite configuration.

SEE ALSO

       chfn(1), login.defs(5), passwd(5).

User Commands							    06/24/2011								   CHSH(1)
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