On Monday 22 February 2021 at 17:26:21, Federico Fanton via Dng wrote:
> On 22/02/21 17:19, Antony Stone wrote:
> >> for table in "${!chains[@]}"; do
> >>
> >> echo "${chains[$table]}" | tr : $"\n" | while IFS= read -r; do
> >>
> >> iptables -t "$table" -P "$REPLY" ACCEPT
> >>
> >> done
> >> iptables -t "$table" -F
> >> iptables -t "$table" -X
> >>
> >> done
> >
> > I do not understand the purpose of $REPLY in that script.
>
> It will contain the name of the chain to be passed to iptables -P.
Hm, interesting. This is some magic facility of bash that I've never come
across. I would have expected to see the variable REPLY being assigned to
somewhere or other...
On the other hand, a review of the bash man page tells me that this is what
'read' does if you don't tell it what to read into. Heh :)
Antony.
--
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