From b7c7ad92833f836b28f4ba09c5f390aab1ec9260 Mon Sep 17 00:00:00 2001
From: john30 <ebusd@ebusd.eu>
Date: Sun, 15 Jan 2017 12:37:01 +0100
Subject: [PATCH] use SIGHUP for reopening log file

---
 contrib/etc/logrotate.d/ebusd | 4 +++-
 src/ebusd/main.cpp            | 4 ++++
 src/lib/utils/log.cpp         | 3 +++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/contrib/etc/logrotate.d/ebusd b/contrib/etc/logrotate.d/ebusd
index a1854f39..c969d679 100644
--- a/contrib/etc/logrotate.d/ebusd
+++ b/contrib/etc/logrotate.d/ebusd
@@ -1,4 +1,4 @@
-/var/log/ebusd.log {
+/var/log/ebusd*.log {
 	rotate 7
 	size 1M
 	copytruncate
@@ -6,4 +6,6 @@
 	missingok
 	notifempty
 	daily
+	postrotate
+		/usr/bin/killall -HUP ebusd
 }
diff --git a/src/ebusd/main.cpp b/src/ebusd/main.cpp
index ea87ae2e..d7b7b759 100644
--- a/src/ebusd/main.cpp
+++ b/src/ebusd/main.cpp
@@ -590,6 +590,10 @@ void signalHandler(int sig) {
   switch (sig) {
   case SIGHUP:
     logNotice(lf_main, "SIGHUP received");
+    if (!opt.foreground) {
+      closeLogFile();
+      setLogFile(opt.logFile);
+    }
     break;
   case SIGINT:
     logNotice(lf_main, "SIGINT received");
diff --git a/src/lib/utils/log.cpp b/src/lib/utils/log.cpp
index c4f9984d..bf15dc44 100644
--- a/src/lib/utils/log.cpp
+++ b/src/lib/utils/log.cpp
@@ -141,6 +141,9 @@ bool needsLog(const LogFacility facility, const LogLevel level) {
 }
 
 void logWrite(const char* facility, const char* level, const char* message, va_list ap) {
+  if (s_logFile == NULL) {
+    return;
+  }
   struct timespec ts;
   struct tm td;
   clockGettime(&ts);