From 193405f1f065a4b1cb6c0a136a9e5965f13993d7 Mon Sep 17 00:00:00 2001
From: Simon Ruderich <simon@ruderich.org>
Date: Sun, 28 Jul 2013 12:21:21 +0200
Subject: [PATCH] log.c: Prevent intermingled output from multiple
 log_message().

---
 src/log.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/log.c b/src/log.c
index 05bd3dc..05acddf 100644
--- a/src/log.c
+++ b/src/log.c
@@ -45,6 +45,9 @@ void log_message(int level, const char *file, int line, const char *format, ...)
     (void)line;
 #endif
 
+    /* Prevent another thread from interrupting the two printfs(). */
+    flockfile(stdout);
+
     fprintf(stdout,
 #ifdef DEBUG
             "%-12s:%-3d "
@@ -58,4 +61,6 @@ void log_message(int level, const char *file, int line, const char *format, ...)
     vfprintf(stdout, format, ap);
     va_end(ap);
     fprintf(stdout, "\n");
+
+    funlockfile(stdout);
 }
-- 
2.44.1