From 9158ca99f740d5b1b50d233e0f64e61504dc6fdf Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Mon, 16 Nov 1998 21:41:21 +0000
Subject: [PATCH] Complain loudly if the logging buffer would overflow.

---
 sysdep/unix/log.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sysdep/unix/log.c b/sysdep/unix/log.c
index b9077c74..00589a3c 100644
--- a/sysdep/unix/log.c
+++ b/sysdep/unix/log.c
@@ -50,8 +50,11 @@ bvfprintf(FILE *f, char *fmt, va_list args)
   char buf[4096];
   int n;
 
-  n = bvsprintf(buf, fmt, args);
-  fwrite(buf, n, sizeof(char), f);
+  n = bvsnprintf(buf, sizeof(buf), fmt, args);
+  if (n >= 0)
+    fwrite(buf, n, sizeof(char), f);
+  else
+    fprintf(stderr, "BIRD: warning: logging buffer overflow!\n");
 }
 
 static void