From bed15ba8447e93c3052442900955894d79d8daf7 Mon Sep 17 00:00:00 2001
From: neil <gitsrc@neilpang.com>
Date: Fri, 10 Jul 2026 10:23:45 +0800
Subject: [PATCH] dns_freedns.sh: use grep -E, BRE \| alternation is a GNU
 extension

OpenBSD grep treats \| in a BRE as a literal | character, so
_freedns_domain_id never matched any row and every domain lookup
failed with "Domain not found". Switch to ERE with -E, keeping the
parens escaped so the (.*) suffix branch still requires literal
parentheses and does not widen the match (e.g. searching example.com
must not match example.company).

Reported-by: @katiekloss @boretom
Ref: https://github.com/acmesh-official/acme.sh/issues/2305
---
 dnsapi/dns_freedns.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dnsapi/dns_freedns.sh b/dnsapi/dns_freedns.sh
index 13d9f68b..8ea86c24 100755
--- a/dnsapi/dns_freedns.sh
+++ b/dnsapi/dns_freedns.sh
@@ -305,7 +305,7 @@ _freedns_domain_id() {
     fi
 
     domain_id="$(echo "$htmlpage" | tr -d " \t\r\n\v\f" | sed 's/<tr>/@<tr>/g' | tr '@' '\n' |
-      grep "<td>$search_domain</td>\|<td>$search_domain(.*)</td>" |
+      grep -E "<td>$search_domain</td>|<td>$search_domain\(.*\)</td>" |
       sed -n 's/.*\(edit\.php?edit_domain_id=[0-9a-zA-Z]*\).*/\1/p' |
       cut -d = -f 2)"
     # The above beauty extracts domain ID from the html page...