Started working on Zenity-version of exercise 3, lab 7

Labb7/ovning3_zenity.sh

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+#!/bin/bash
+
+# Jack-Benny Persson
+# LX13
+# Excercise 3, lab 7 (Code a script to help admins create new users)
+
+# Define some variables
+
+# Binaries
+Chpasswd="/usr/sbin/chpasswd"
+Useradd="/usr/sbin/useradd"
+Zenity="/usr/bin/zenity"
+Grep="/bin/grep"
+Cat="/bin/cat"
+Rm="/bin/rm"
+
+# Functions
+ask()
+{
+	$Zenity --title "Create new user" --forms \
+		--add-entry="Username" \
+		--add-entry="Full path of shell" \
+		--add-entry="Optional comment (Full name etc)" \
+		--add-password="Password" \
+		> /tmp/createuser
+	Input=`$Cat /tmp/createuser`
+	if [ $? -eq 1 ]; then
+		echo "Aborting, user hit cancel..."
+		exit 2
+	elif [ $? -ne 0 ]; then
+		echo "Aborting, something went wrong"
+		exit 2
+	fi
+}
+
+
+# Sanity checks
+if [ $EUID -ne 0 ]; then
+	echo "You need to run this script as root"
+	exit 2
+fi
+
+for bin in $Chpasswd $Useradd $Zenity $Grep $Cat $Rm; do
+	if [ ! -x $bin ]; then
+		echo "Can't execute $bin"
+		exit 2
+	fi
+done
+
+# Main
+ask "Enter username of the new user"
+Username=$Input
+
+# Get a list of all avaliable shells on the system
+Shell=`$Cat /etc/shells | $Grep /bin`
+ShellList=`printf "$Shell" | sed 's/ / shell /g' | sed 's/$/ shell/'`
+
+HowMany=`echo $Shell | wc -w` # How many shells are avaliable?
+
+$Zenity --backtitle "Create new user"\
+	--menu "Choose a shell for your new user" 14 60 $HowMany $ShellList\
+	2> /tmp/createuser
+Input=`$Cat /tmp/createuser`
+UserShell=$Input
+
+ask "Enter a password for the new user"
+Password=$Input
+
+# Remove the temp file (it contains the password of latest created user)
+$Rm /tmp/createuser
+
+# Create the user and set the password
+$Useradd -m -s $UserShell $Username
+echo "${Username}:${Password}" | $Chpasswd
+
+exit 0