nixpkgs/pkgs/applications/networking/msmtp/msmtpq-systemd-logging.patch

diff --git a/scripts/msmtpq/msmtpq b/scripts/msmtpq/msmtpq
index bcb384e..dbaf1b5 100755
--- a/scripts/msmtpq/msmtpq
+++ b/scripts/msmtpq/msmtpq
@@ -92,6 +92,8 @@ if [ ! -v MSMTPQ_LOG ] ; then
   fi
 fi
 [ -d "$(dirname "$MSMTPQ_LOG")" ] || mkdir -p "$(dirname "$MSMTPQ_LOG")"
+
+JOURNAL=@journal@
 ## ======================================================================================
 
 ## msmtpq can use the following environment variables :
@@ -144,6 +146,7 @@ on_exit() {                          # unlock the queue on exit if the lock was
 ## display msg to user, as well
 ##
 log() {
+  local NAME=msmtpq
   local ARG RC PFX
   PFX="$('date' +'%Y %d %b %H:%M:%S')"
                                      # time stamp prefix - "2008 13 Mar 03:59:45 "
@@ -161,10 +164,19 @@ log() {
     done
   fi
 
+  if [ "$JOURNAL" = "Y" ]; then
+    for ARG; do
+      [ -n "$ARG" ] &&
+        echo "$ARG" | systemd-cat -t "$NAME" -p info
+    done
+  fi
+
   if [ -n "$RC" ] ; then             # an error ; leave w/error return
     [ -n "$LKD" ] && lock_queue -u   # unlock here (if locked)
     [ -n "$MSMTPQ_LOG" ] && \
       echo "    exit code = $RC" >> "$MSMTPQ_LOG" # logging ok ; send exit code to log
+    [ "$JOURNAL" = "Y" ] && \
+      echo "exit code= $RC" | systemd-cat -t "$NAME" -p emerg
     exit "$RC"                       # exit w/return code
   fi
 }