From 10b5d4a231d085b03d67d009cef577fbfb7edaf2 Mon Sep 17 00:00:00 2001
From: "Christian W. Zuckschwerdt" <christian@zuckschwerdt.org>
Date: Thu, 27 Dec 2018 13:32:02 +0100
Subject: [PATCH] Use thread-safe localtime

---
 src/util.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/util.c b/src/util.c
index 3c087315..274ca3ab 100644
--- a/src/util.c
+++ b/src/util.c
@@ -257,7 +257,7 @@ void get_time_now(struct timeval *tv)
 char *local_time_str(time_t time_secs, char *buf)
 {
     time_t etime;
-    struct tm *tm_info;
+    struct tm tm_info;
 
     if (time_secs == 0) {
         time(&etime);
@@ -266,9 +266,14 @@ char *local_time_str(time_t time_secs, char *buf)
         etime = time_secs;
     }
 
-    tm_info = localtime(&etime); // note: win32 doesn't have localtime_r()
+#ifdef _MSC_VER
+    localtime_s(&tm_info, &etime); // win32 doesn't have localtime_r()
 
-    strftime(buf, LOCAL_TIME_BUFLEN, "%Y-%m-%d %H:%M:%S", tm_info);
+#else
+    localtime_r(&etime, &tm_info); // thread-safe
+#endif
+
+    strftime(buf, LOCAL_TIME_BUFLEN, "%Y-%m-%d %H:%M:%S", &tm_info);
     return buf;
 }