From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Stefan Reiter <s.reiter@proxmox.com>
Date: Tue, 30 Jun 2020 13:10:10 +0200
Subject: [PATCH] PVE: redirect stderr to journal when daemonized

QEMU uses the logging for error messages usually, so LOG_ERR is most
fitting.
---
 Makefile.objs | 1 +
 os-posix.c    | 7 +++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Makefile.objs b/Makefile.objs
index b7d58e592e..105f23bff7 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -55,6 +55,7 @@ common-obj-y += net/
 common-obj-y += qdev-monitor.o
 common-obj-$(CONFIG_WIN32) += os-win32.o
 common-obj-$(CONFIG_POSIX) += os-posix.o
+os-posix.o-libs := -lsystemd
 
 common-obj-$(CONFIG_LINUX) += fsdev/
 
diff --git a/os-posix.c b/os-posix.c
index 3cd52e1e70..ab4d052c62 100644
--- a/os-posix.c
+++ b/os-posix.c
@@ -28,6 +28,8 @@
 #include <pwd.h>
 #include <grp.h>
 #include <libgen.h>
+#include <systemd/sd-journal.h>
+#include <syslog.h>
 
 #include "qemu-common.h"
 /* Needed early for CONFIG_BSD etc. */
@@ -309,9 +311,10 @@ void os_setup_post(void)
 
         dup2(fd, 0);
         dup2(fd, 1);
-        /* In case -D is given do not redirect stderr to /dev/null */
+        /* In case -D is given do not redirect stderr to journal */
         if (!qemu_logfile) {
-            dup2(fd, 2);
+            int journal_fd = sd_journal_stream_fd("QEMU", LOG_ERR, 0);
+            dup2(journal_fd, 2);
         }
 
         close(fd);