block access to sites with cron and unbound

blockfs

#!/bin/bash

readonly UCONF='/etc/unbound/unbound.conf'

# toggle block on/off, kill chromium, restart unbound
awk -v commentId='#' -v word='include: /etc/unbound/block.conf' '
  $0 ~ "(^|[[:punct:][:space:]])" word "($|[[:punct:][:space:]])" {
    if (match($0, "^[[:space:]]*" commentId)) {
      $0 = substr($0, RSTART + RLENGTH);
      system("pkill --oldest chromium")
      system("systemctl restart unbound");
    }
    else {
      $0 = commentId $0;
      system("systemctl restart unbound");
    }
}
{ print }
' ${UCONF} > tmpunboundconf.$$ && mv tmpunboundconf.$$ ${UCONF}