From fd0107154e6b8bec2acee3de8b34c23956bcbe2f Mon Sep 17 00:00:00 2001
From: Christoph <ckubu@oopen.de>
Date: Sun, 24 Oct 2021 13:07:29 +0200
Subject: [PATCH] Make script check_postfwd.sh compartible with Debian 11
 (bullseye).

---
 check_postfwd.sh | 42 ++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 40 insertions(+), 2 deletions(-)

diff --git a/check_postfwd.sh b/check_postfwd.sh
index 4b290f0..f0da371 100755
--- a/check_postfwd.sh
+++ b/check_postfwd.sh
@@ -73,6 +73,41 @@ trim() {
     echo -n "$var"
 }
 
+trim_double_quotes() {
+    local var="$*"
+    var="${var#"${var%%[!\"]*}"}"   # remove leading whitespace characters
+    var="${var%"${var##*[!\"]}"}"   # remove trailing whitespace characters
+    echo -n "$var"
+}
+
+read_env_from_file() {
+
+   _file="$*"
+
+   while read _ENV _REST ; do
+
+      _ENV="$(trim $_ENV)"
+
+      if [[ "$_ENV" =~ .{2,}=.+ ]]; then
+         _key="${_ENV%=*}"
+         _val="${_ENV##*=}"
+
+
+         # - Remove leading / trailling double quotes
+         # -    _val="${_val%\"}"
+         # -    _val="${_val#\"}"
+         # -
+         _val="$(trim_double_quotes $_val)"
+
+         if [[ -n "$(trim $_key)" ]] && [[ -n "$(trim $_val)" ]] ; then
+            export $_ENV
+         fi
+      fi
+
+   done < "$_file"
+
+}
+
 
 #---------------------------------------
 #-----------------------------
@@ -145,9 +180,12 @@ if [[ -n "$SYSTEMD_SERVICE" ]] ; then
       check_string_ps="$(trim $(cat "$_systemd_service_file" | grep ExecStart | grep -o -E "ExecStart\s*=\s*[^[:space:]]+" | cut -d "=" -f2))"
    fi
 else
-   check_string_ps="$(trim $(cat "$SYSV_INIT_SCRIPT" | grep DAEMON | grep -o -E "DAEMON\s*=\s*[^[:space:]]+" | cut -d "=" -f2))"
-fi
 
+   read_env_from_file $SYSV_INIT_SCRIPT
+
+   _check_string_ps="$(trim $(cat "$SYSV_INIT_SCRIPT" | grep DAEMON | grep -o -E "DAEMON\s*=\s*[^[:space:]]+" | cut -d "=" -f2))"
+   check_string_ps="$(eval echo "$_check_string_ps")"
+fi
 
 
 #---------------------------------------