close trace file if needed

include/n2n.h

@@ -398,6 +398,7 @@ void setTraceLevel(int level);
 void setUseSyslog(int use_syslog);
 void setTraceFile(FILE *f);
 int getTraceLevel();
+void closeTraceFile();
 void traceEvent(int eventTraceLevel, char* file, int line, char * format, ...);
 
 /* Tuntap API */

src/edge_utils.c

@@ -1982,6 +1982,8 @@ void edge_term(n2n_edge_t * eee) {
 
   edge_cleanup_routes(eee);
 
+  closeTraceFile();
+
   free(eee);
 }
 

src/n2n.c

@@ -82,6 +82,12 @@ void setTraceFile(FILE *f) {
   traceFile = f;
 }
 
+void closeTraceFile() {
+  if (traceFile != NULL && traceFile != stdout) {
+    fclose(traceFile);
+  }
+}
+
 #define N2N_TRACE_DATESIZE 32
 void traceEvent(int eventTraceLevel, char* file, int line, char * format, ...) {
   va_list va_ap;