#!/bin/bash

OLDIFS=$IFS
IFS=","

while read class profil lastname firstname pesel
do
  first=$(echo $firstname | iconv -f UTF-8 -t ASCII//translit | cut -c 1-2)
  last=$(echo $lastname | iconv -f UTF-8 -t ASCII//translit)

  login=$(echo "$class.$last.$first" | tr '[:upper:]' '[:lower:]')
  passwd=$(openssl passwd -1 ${pesel})

  useradd -c "${firstname} ${lastname}" -d /home/"${login}" -G users -s /bin/bash -p ${passwd} ${login}

done < students.csv

IFS=$OLDIFS