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Full Discussion: Use of stty vs trap in script-driven login menu
Top Forums Shell Programming and Scripting Use of stty vs trap in script-driven login menu Post 302607494 by jim mcnamara on Wednesday 14th of March 2012 03:01:04 PM
Old 03-14-2012
You are asking several questions

1. you can compile a shell script using the shc tool, you have to compile the tool on your machine.
Francisco Rosales, home page

2. DO NOT make the users shell the shell script

3. One of the best approaches is to chroot the user. Create a chroot jail. The only downside is that you have to have copies of ALL the shells, commands the shell scripts call, and any special application code etc., - inside the jail. One copy for everybody is fine. Even if the use gets "out" of the menu somehow, he/she cannot do much.

This gives an overview and some howto. If you want to try it there are dozens of tutorials on the net. google for 'chroot howto'

Best Practices for UNIX chroot() Operations

4. another choice is to use a restricted shell - usually /bin/rsh as the login shell, check your documentation.
Run the menu under that shell. Again it may or may not be a choice, but check it out anyway.

On purpose, I kinda ignored the signal trapping. When you set things up well to start with, signal trapping is a lesser concern.
This User Gave Thanks to jim mcnamara For This Post:
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LEARN ABOUT DEBIAN

adt-virt-chroot

adt-virt-chroot(1)					     Linux Programmer's Manual						adt-virt-chroot(1)

NAME

       adt-virt-chroot - autopkgtest virtualisation server using a chroot

SYNOPSYS

       adt-virt-chroot [options] =[chroot-name]
       adt-virt-chroot [options] [-rgain-root-cmd] /path/to/chroot

DESCRIPTION

       adt-virt-chroot provides an autopkgtest virtualisation server using a chroot install (or similar).

       Normally adt-virt-chroot will be invoked by adt-run.

       The  chroot to use must be specified.  If it starts with a = character then it is taken to be a chroot name known to dchroot(8).  Otherwise
       it must start with a / and will be taken to an absolute path.

OPTIONS

       --gain-root|-r gain-root-cmd
	      Specifies that adt-virt-chroot can become root (on the host) by prefixing its commands with gain-root-cmd.  The command may  consist
	      of  several words separated by whitespace, in which case words other than the first are supplied as additional arguments to the com-
	      mand; other shell (or other) metacharacters in gain-root-cmd are not interpreted or modified by adt-virt-chroot.	The actual command
	      to be run as root, and its arguments, are supplied as additional (separate) arguments to gain-root-cmd.

	      Root  privilege is needed, to successfully run chroot(8), if the chroot to use is specified as an absolute path.	The default is not
	      to take any special action when root will be needed, in which case for an absolute path chroot, adt-virt-chroot must be  started	as
	      root.

       -d | --debug
	      Enables debugging output.  Probably not hugely interesting.

INPUT, OUTPUT AND EXIT STATUS
       The behaviour of adt-virt-chroot is as described by the AutomatedTesting virtualisation regime specification.

SEE ALSO

       adt-run(1), adt-virt-null(1), adt-virt-xenlvm(1), /usr/share/doc/autopkgtest/.

AUTHORS AND COPYRIGHT

       This  manpage  is part of autopkgtest, a tool for testing Debian binary packages.  autopkgtest is Copyright (C) 2006-2007 Canonical Ltd and
       others.

       See /usr/share/doc/autopkgtest/CREDITS for the list of contributors and full copying conditions.

autopkgtest							       2007							adt-virt-chroot(1)
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