* r53

~r53~ is a dynamic DNS client for AWS Route 53. It queries the host's
public IPv4 and IPv6 addresses via OpenDNS (falling back to Google) and
upserts the corresponding =A= and =AAAA= records for each domain.

** Usage

#+begin_src shell
r53 -zone ZONEID [-ttl SECONDS] <domain>...
#+end_src

Flags:

- =-zone= — Route 53 hosted zone ID (required)
- =-ttl= — TTL of the DNS records in seconds (default: 300)

Arguments:

- =<domain>= — one or more domain names to update

~r53~ requires the =dig= command and AWS credentials from the SDK default
chain (environment, shared config, or IMDS).

On success the command writes nothing to =stdout=; it logs the Route 53
response for each domain to =stderr= at debug level.

** Examples

#+begin_src shell
$ r53 -zone Z1234567890EXAMPLE example.com www.example.com

$ r53 example.com
time=2026-10-24T03:08:42Z level=ERROR source=…/cmd/r53/main.go:38 \
	msg=failed error="missing hosted zone id"
#+end_src

** Installation

#+begin_src shell
go install code.chimeric.al/dwrz/r53/cmd/r53@latest
#+end_src