#! /bin/bash

if [ "$EUID" -ne 0 ]; then
	echo "Script se musi spoustet jako root!"
 	exit 1
fi


check_number ()
{
	if [[ ! $1 =~ ^-?[0-9]+$ ]]; then
		printf "NEPLATNE CISLO!\n"
		exit 1
	fi
}

printf "Pocet uzivatelu k vytvoreni: "
read POCET
check_number $POCET

printf "Spolecne heslo pro ucty: "
read PASSWORD

CURRENT=1

while [ $CURRENT -lt $(($POCET + 1)) ]; do

	USERNAME="uzivatel_$CURRENT"
	echo "Vytvarim uzivatele $USERNAME..."

	CURRENT=$(($CURRENT + 1))

	useradd -m -d "/home/$USERNAME" $USERNAME
	echo "$USERNAME:$PASSWORD" | chpasswd
done;