From 7923a28c130cc2cc3813a9b1a5c83d22759d2e34 Mon Sep 17 00:00:00 2001
From: Wouter Wijngaards <wouter@nlnetlabs.nl>
Date: Thu, 10 Sep 2009 14:33:46 +0000
Subject: [PATCH] line buffering

git-svn-id: file:///svn/unbound/trunk@1828 be551aaa-1e26-0410-a405-d3ace91eadb9
---
 doc/Changelog | 8 +++++++-
 util/log.c    | 7 +++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/doc/Changelog b/doc/Changelog
index 9625ee794..600a787b4 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -1,10 +1,16 @@
+10 September 2009: Wouter
+	- increased MAXSYSLOGLEN so .bg key can be printed in debug output.
+	- use linebuffering for log-file: output, this can be significantly
+	  faster than the previous fflush method and enable some class of
+	  resolvers to use high verbosity (for short periods).
+	  Not on windows, because line buffering does not work there.
+
 9 September 2009: Wouter
 	- Fix bug where DNSSEC-bogus messages were marked with too high TTL.
 	  The RRsets would still expire at the normal time, but this would
 	  keep messages bogus in the cache for too long.
 	- regression test for that bug.
 	- documented that load_cache is meant for debugging.
-	- increased MAXSYSLOGLEN so .bg key can be printed in debug output.
 
 8 September 2009: Wouter
 	- fixup printing errors when load_cache, they were printed to the
diff --git a/util/log.c b/util/log.c
index ef822023b..f2ddac21f 100644
--- a/util/log.c
+++ b/util/log.c
@@ -129,6 +129,10 @@ log_init(const char* filename, int use_syslog, const char* chrootdir)
 			strerror(errno));
 		return;
 	}
+#ifndef UB_ON_WINDOWS
+	/* line buffering does not work on windows */
+	setvbuf(f, NULL, _IOLBF, 0);
+#endif
 	logfile = f;
 }
 
@@ -217,7 +221,10 @@ log_vmsg(int pri, const char* type,
 #endif
 	fprintf(logfile, "[%u] %s[%d:%x] %s: %s\n", (unsigned)now, 
 		ident, (int)getpid(), tid?*tid:0, type, message);
+#ifdef UB_ON_WINDOWS
+	/* line buffering does not work on windows */
 	fflush(logfile);
+#endif
 }
 
 /**