X-Git-Url: https://ruderich.org/simon/gitweb/?a=blobdiff_plain;f=src%2Flog.c;h=a791450da0a4bba518ca3a7969e05b786d9cf738;hb=b7ce41b809a3b3533d398c0da8fd9787c149434c;hp=e00a08d8aa77f9a2914ce39fee3821c97bd87e97;hpb=a64101800c79c852cc4ab9d445c35aad0a6457eb;p=tlsproxy%2Ftlsproxy.git

diff --git a/src/log.c b/src/log.c
index e00a08d..a791450 100644
--- a/src/log.c
+++ b/src/log.c
@@ -20,10 +20,8 @@
 #include "tlsproxy.h"
 #include "log.h"
 
-/* va_*() */
-#include <stdarg.h>
-/* pthread_self() */
 #include <pthread.h>
+#include <stdarg.h>
 
 
 void log_message(int level, const char *file, int line, const char *format, ...) {
@@ -47,8 +45,10 @@ void log_message(int level, const char *file, int line, const char *format, ...)
     (void)line;
 #endif
 
-    va_start(ap, format);
-    fprintf(stdout,
+    /* Prevent another thread from interrupting the two printfs(). */
+    flockfile(stderr);
+
+    fprintf(stderr,
 #ifdef DEBUG
             "%-12s:%-3d "
 #endif
@@ -57,7 +57,10 @@ void log_message(int level, const char *file, int line, const char *format, ...)
             file, line,
 #endif
             level_string, (int)pthread_self());
-    vfprintf(stdout, format, ap);
-    fprintf(stdout, "\n");
+    va_start(ap, format);
+    vfprintf(stderr, format, ap);
     va_end(ap);
+    fprintf(stderr, "\n");
+
+    funlockfile(stderr);
 }