Started coding on Excercise 3, lab 7

Labb7/ovning3.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"
+Dialog="/usr/bin/dialog"
+Grep="/bin/grep"
+Cat="/bin/cat"
+
+# Functions
+ask()
+{
+	$Dialog --backtitle "Create new user" --inputbox "$1" 10 60\
+		>> /tmp/createuser
+	Input=`$Cat /tmp/createuser`
+	if [ $? -ne 0 ]; then
+		echo "Aborting, something went wrong..."
+		exit 2
+	elif [ $? -eq 255 ]; then
+		echo "Aborting, user hit ESC"
+		exit 2
+	fi
+}
+
+list_shells()
+{
+	for Shell in `$Cat /etc/shells | $Grep /bin`; do
+		echo "$Shell '$Shell'"	
+	done
+}
+
+# Sanity checks
+if [ $EUID -ne 0 ]; then
+	echo "You need to run this script as root"
+	exit 2
+fi
+
+for bin in $Chpasswd $Dialog; do
+	if [ ! -x $bin ]; then
+		echo "Can't execute $bin"
+		exit 2
+	fi
+done
+
+# Main
+ask "Enter username of the new user"
+Username=$Input
+
+$Dialog --backtitle "Create new user"\
+	--menu "Choose a shell for your new user" 10 60 list_shells