From 990db6702babfd19e4d5488ba8d77bb7a90f7ee6 Mon Sep 17 00:00:00 2001
From: Johannes Truschnigg <johannes@truschnigg.info>
Date: Sat, 3 Sep 2022 21:39:10 +0200
Subject: [PATCH] Make configuration file mandatory

---
 sqm_lagthrottle.sh | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sqm_lagthrottle.sh b/sqm_lagthrottle.sh
index ade83ef..dd23423 100755
--- a/sqm_lagthrottle.sh
+++ b/sqm_lagthrottle.sh
@@ -100,7 +100,13 @@ do
 done
 
 
-if [ -r "${SQML_CFGFILE}" ] && sh -n "${SQML_CFGFILE}"
+if ! [ -r "${SQML_CFGFILE}" ]
+then
+  printf 'FATAL: Required configuration file "%s" cannot be read.\n' "${SQML_CFGFILE}" >&2
+  exit 1
+fi
+
+if sh -n "${SQML_CFGFILE}"
 then
   printf '# INFO: Evaluating configuration file at "%s"...\n' "${SQML_CFGFILE}"
   _ps4="${PS4}"
-- 
2.39.5