function f_umask {
  echo "[$SCRIPT_COUNT] umask"

  if [ -f /etc/init.d/rc ]; then
    sed -i 's/umask 022/umask 077/g' /etc/init.d/rc
  fi

  if ! grep -q -i "umask" "/etc/profile" 2> /dev/null; then
    echo "umask 077" >> /etc/profile
  fi

  if ! grep -q -i "umask" "/etc/bash.bashrc" 2> /dev/null; then
    echo "umask 077" >> /etc/bash.bashrc
  fi

  if ! grep -q -i "TMOUT" "/etc/profile.d/*" 2> /dev/null; then
    echo -e 'TMOUT=600\nreadonly TMOUT\nexport TMOUT' > '/etc/profile.d/autologout.sh'
    chmod +x /etc/profile.d/autologout.sh
  fi

  ((SCRIPT_COUNT++))
}