#!/bin/sh
 set -euC
 
 # nfsn-dns-dkim DOMAIN NAME SELECTOR KEY_TYPE KEY_PUB
 
 # nfsn-dns-dkim "example.com" "" "k1" "rsa" "$key_pub"
 
 # Arguments.
 
 domain="$1" ; shift
 name="$1" ; shift
 selector="$1" ; shift
 key_type="$1" ; shift
 key_pub="$1" ; shift
 
 # Process.
 
 name="$selector._domainkey${name:+".$name"}"
 data="v=DKIM1; k=$key_type; p=$key_pub"
 
 # Update.
 
 nfsn-dns-update "$domain" "$name" "TXT" '^v=DKIM1' "$data"