From 0c48343c7a35e299595c6af70c7191a5cc402262 Mon Sep 17 00:00:00 2001
From: Tim Kimber <tkimber@mobius.org.uk>
Date: Fri, 1 Jan 2021 18:39:08 +0000
Subject: [PATCH] Check for posix mode and show a sensible error

---
 getssl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/getssl b/getssl
index a20a9bd..be34b3b 100755
--- a/getssl
+++ b/getssl
@@ -250,6 +250,10 @@
 # 2020-12-29 Fix dig SOA lookup (#617)(2.33)
 # ----------------------------------------------------------------------------------------
 
+case :$SHELLOPTS: in
+  *:posix:*)   echo -e "${0##*/}: Running with POSIX mode enabled is not supported" >&2; exit 1;;
+esac
+
 PROGNAME=${0##*/}
 PROGDIR="$(cd "$(dirname "$0")" || exit; pwd -P;)"
 VERSION="2.33"