Auto connect to wireless network without sudo privileges

How I got my notebook to connect to my wireless network for users without sudo privileges. I'm using Kubuntu 6.06.
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1. You should have <strong>/etc/network/interfaces</strong> configured for automatic network connection. It should contain something like this:

<code>
&nbsp;&nbsp;&nbsp;auto eth2 <em>[or your wireless interface designation]</em>
&nbsp;&nbsp;&nbsp;iface eth2 inet dhcp
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wireless-mode managed
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wireless-essid HOME-NET
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wireless-key1 XXXXXXXXXX
</code>

2. If you visit a new location, such as a coffee shop, you can set things up so that a normal user can connect without having sudo privileges.

Create a script named /usr/local/bin/wireless:

<code>
&nbsp;&nbsp;&nbsp;#!/bin/sh
&nbsp;&nbsp;&nbsp;case "${1}" in
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;("start")
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;# Use start option when run from a script at login.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;# With this parameter the gui does not run if we are
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;# already connected.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;# Determine if we are connected already
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;STATUS=`ifconfig | grep "inet addr" | grep --invert-match "127.0.0.1"`
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if test -z "$STATUS"; then
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;xhost +local:root
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sudo /usr/bin/wlassistant
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo Network already connected
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;fi
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(*)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;# Use no options when the user starts this file manually,
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;# the gui will start even if network is already connected.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;xhost +local:root
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sudo /usr/bin/wlassistant
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;;
&nbsp;&nbsp;&nbsp;esac
</code>

After creating, set executable permission: sudo chmod +x wireless

Note: This script is to be run by user, no need to run sudo.

3. sudo edit <strong>/etc/sudoers</strong> and add the following line at the end:

<code>
%users ALL = NOPASSWD: /usr/bin/wlassistant
</code>

Be Careful! If you make mistakes in /etc/sudoers all users could lose sudo privileges!

This allows members of the <strong>users</strong> group to sudo run wlassistant without a password. I add all the users of my notebook to the <strong>users</strong> group.

4. To bring up a dialog at login when no networks are found (In KDE):
&nbsp;&nbsp;&nbsp;A. Open konqueror and create <strong>wireless.desktop</strong> by right clicking in <strong>~/.kde/Autostart/</strong>
&nbsp;&nbsp;&nbsp;and selecting "Create new link to application"
&nbsp;&nbsp;&nbsp;B. In properties dialog, under application tab, in "command" box type: <strong>wireless start</strong>
&nbsp;&nbsp;&nbsp;in "name" box type: <strong>wireless</strong>

5. Create a menu entry for Wireless Lan Startup with the command: <strong>wireless</strong>
this may also be added to the system tray.