#!/bin/bash
# Name:		del_ftp_user
# Purpose:	Demonstrate some Functions of kdialog
#		- It makes a list of users of the ftp group in a menu
#		- It shows the content of the user's home directory 
#		  and asks if it should be deleted as well
#		- It asks for confirmation of the delete operation
#		- If confirmed then it asks for the root password
#		- if password ok then it executes the operation
#		- It then confirms the operation 
# Syntax:	del_ftp_user
# 
#----------------------------------------------------
# Preparation:
# 	users to delete must be from the group 'ftp' as primary group
# 	tip: create users with the command: useradd -m -g ftp username 
#----------------------------------------------------
# Get all the ftp users into a menu
ftpgid=$(grep "^ftp:" /etc/group | cut -d: -f3)
ftpusers=$(grep ":$ftpgid:" /etc/passwd | grep -v "^ftp:" | cut -d: -f1)
# Put the users in a kdialog menu
index=1
for user in $ftpusers ; do
	menu="$menu $index $user"
	let index++
done
#echo $menu

#--------------- call the kdialog menu
answer=$(/opt/kde3/bin/kdialog --menu "Select user to delete" $menu)
#----------- exit if 'cancel' button is clicked
[ $answer ] || exit 1

#echo $answer

#----- Retrieve the user from the menu list. Learning && and break
index=1
for user in $ftpusers ; do
	 [ $answer -eq $index ] && break
	let index++
done
#echo $user

#------------ show the content of the home dir of the user
# get the home dir of the user
homedir=$(grep "^$user:" /etc/passwd | cut -d: -f6)
xterm -e sh -c "ls -la $homedir | less" &
#------------ get the PID of the xterm 
pid=$!
#------------ ask if it should be deleted
/opt/kde3/bin/kdialog --yesno "The content of the home directory '$homedir' of user '$user' is \
shown in a terminal.\nShould it also be deleted?"
#echo $?

#----------- ask for confirmation of the delete action
if [ $? -eq 0 ]; then
	# Sure to delete the user and directory?
	/opt/kde3/bin/kdialog --yesno "Are you sure that you want to delete the user '$user'\n\
AND his home directory :$homedir: ?"
	[ $? -eq 0 ] && erase=dir
else
        /opt/kde3/bin/kdialog --yesno "Are you sure that you want to delete the user '$user'\n\
but NOT his home directory '$homedir'?"
	[ $? -eq 0 ] && erase=user
fi
#echo $erase
#exit

#------------ kill the xterm
kill $pid

case $erase in 
	dir)
		#------------ get the root password via kdialog
		passwd=$(/opt/kde3/bin/kdialog --password "Please enter root password")
		if ! (echo $passwd | su - -c "userdel -r $user") ; then
		    /opt/kde3/bin/kdialog --error "ERROR: root password is incorrect.\n\
User '$user' and his directory '$homedir' will NOT be erased!"
		else
			/opt/kde3/bin/kdialog --msgbox "User '$user' and his home directory \
'$homedir' has been erased."
		fi
	     ;;
	user)
		#------------ get the root password via kdialog
		passwd=$(/opt/kde3/bin/kdialog --password "Please enter root password")
		if ! (echo $passwd | su - -c "userdel $user") ; then
		    /opt/kde3/bin/kdialog --error "ERROR: root password is incorrect.\n\
User $user will NOT be erased!"
		else
			/opt/kde3/bin/kdialog --msgbox "User '$user' has been erased."
		fi
	     ;;	

	*)
		/opt/kde3/bin/kdialog --msgbox "User '$user' and his home directory '$homedir'\n\
will NOT be erased"
	    ;;
esac