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Use of sudoer with ssh login shell script (KSH)

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Old 07-01-2007
Use of sudoer with ssh login shell script (KSH)
Greetings all,

I'm in the midst of writing a login component for a series of shell scripts. What my login script does is this:

1. Prompt for username and read in username
2. Prompt for destination host and read in destination host
3. run ssh username and destination host
4. After user keys in password and verification is complete, the login script checks his username against a file and looks up his level of access rights (indicated by a number). The script then launches either a.sh (for superusers) or b.sh (for standard users) depending on his access rights.

I'm just wondering whether I can make use of the sudoers file to achieve step 4 instead of keeping an extra file on the system to store user priority records since it would appear that both files serve a similar function.

If it is possible to make use of the sudoer file to determine a given user's access rights and launch him/her into one of the shell scripts accordingly, how can this be achieved?

Thanks in advance Smilie
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LEARN ABOUT V7

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.

       -R, --root CHROOT_DIR
	   Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

       -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).

shadow-utils 4.5						    01/25/2018								   CHSH(1)