Linux CDROM Burner Kiosk Script

#!/bin/bash
#Directory test - ensures that script is run from its own directory. Dialog test - ensures the 'dialog' command is installed.
testdir=`ls linuxcd.sh`
testdialog=`ls /usr/bin/dialog`
clear
if [ "$testdir" != "linuxcd.sh" ]; then echo '***Error! Script must be run from its working directory***'; exit; fi
if [ "$testdialog" != "/usr/bin/dialog" ];
then
echo '***Error! "Dialog" is not installed.***'
echo 'Install it? y/n'
read installdialog
if [ "$installdialog" = "y" ]; then sudo apt-get install dialog; fi
exit
fi
#Simple kiosk-style linux distro cdrom burner
#--------------------------------------------
#ISO Image Paths (Symlinks in ISO folder)
ubuntu=ISO/ubuntu
kubuntu=ISO/kubuntu
xubuntu=ISO/xubuntu
opensuse=ISO/opensuse
fedora=ISO/fedora
debian_xfce=ISO/debian_xfce
debian_kde=ISO/debian_kde
pclinuxos=ISO/pclinuxos
linuxmint=ISO/linuxmint
#Burn Speed
bspeed=10
#Burn set to burn device file
bdevice=`cat config/device`
#Password set to password file
password=`cat config/password`
#Screen Resolution
xres=640
yres=480
mheight=100
#--------------------------------------------
main_menu() {
trap main_menu INT
select=$(dialog --menu --stdout "Linux Distro Burner" "$xres" "$yres" "$mheight" 1 'Ubuntu' 2 'Kubuntu' 3 'Xubuntu' 4 'OpenSuse' 5 'Fedora' 6 'Debian XFCE' 7 'Debian KDE' 8 'PCLinuxOS' 9 'Linux Mint' 10 'Administration')
if [ "$select" = "" ]; then main_menu; fi
if [ "$select" = "1" ]; then bimage=$ubuntu; burn; fi
if [ "$select" = "2" ]; then bimage=$kubuntu; burn; fi
if [ "$select" = "3" ]; then bimage=$xubuntu; burn; fi
if [ "$select" = "4" ]; then bimage=$opensuse; burn; fi
if [ "$select" = "5" ]; then bimage=$fedora; burn; fi
if [ "$select" = "6" ]; then bimage=$debian_xfce; burn; fi
if [ "$select" = "7" ]; then bimage=$debian_kde; burn; fi
if [ "$select" = "8" ]; then bimage=$pclinuxos; burn; fi
if [ "$select" = "9" ]; then bimage=$linuxmint; burn; fi
if [ "$select" = "10" ]; then adminauth; fi
}
burn() {
trap main_menu INT
dialog --yesno "Are you sure you wish to burn?" "$xres" "$yres"
if [ "$?" = "1" ]; then main_menu; fi
dialog --msgbox "Please insert a disk, and press OK..." "$xres" "$yres"
clear
wodim -v -pad speed=$bspeed dev=$bdevice $bimage
main_menu
}
admin() {
admin=$(dialog --menu --stdout "Administration Menu" "$xres" "$yres" "$mheight" 1 "Drop to Shell" 2 "Server Info" 3 "Reload Script" 4 "Change Password" 5 "Change CDROM Device" 6 "Return to Main Menu")
if [ "$admin" = "1" ];
then
dialog --yesno "Are you sure? This will terminate the script." "$xres" "$yres"
if [ "$?" = "1" ]; then admin; fi
clear
killall linuxcd.sh
fi
if [ "$admin" = "2" ]; then dialog --textbox "config/serverinfo" "$xres" "$yres"; admin; fi
if [ "$admin" = "3" ]; then ./linuxcd.sh; fi
if [ "$admin" = "4" ];
then
passwordchange1=$(dialog --passwordbox --stdout "Change Password" "$xres" "$yres")
passwordchange2=$(dialog --passwordbox --stdout "Confirm Password" "$xres" "$yres")
if [ "$passwordchange1" != "$passwordchange2" ]; then dialog --msgbox "Error - Passwords do not match" "$xres" "$yres"; admin; fi
if [ "$passwordchange1" = "$passwordchange2" ]; then echo "$passwordchange1" > config/password; dialog --msgbox "Password Changed Successfully" "$xres" "$yres"; password="$passwordchange1"; admin; fi
fi
if [ "$admin" = "5" ]; then bdevice=$(dialog --inputbox --stdout "Enter CDROM Device" "$xres" "$yres" "$bdevice"); echo "$bdevice" > config/device; admin; fi
if [ "$admin" = "6" ]; then main_menu; fi
if [ "$admin" = "" ]; then main_menu; fi
}
adminauth() {
passwordauth=$(dialog --passwordbox --stdout "Enter Password" "$xres" "$yres")
if [ "$passwordauth" = "$password" ]; then admin; fi
if [ "$passwordauth" != "$password" ]; then dialog --msgbox "Access Denied" "$xres" "$yres"; main_menu; fi
}
main_menu