From c4986ca6de5da6b5bdf4263032552f19bc3e1249 Mon Sep 17 00:00:00 2001
From: Rainer Gerhards <rgerhards@adiscon.com>
Date: Mon, 23 Jul 2007 10:17:55 +0000
Subject: added DropTrailingLFOnReception config directive

---
 ChangeLog |  1 +
 syslogd.c | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index e2958999..b2c993da 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,6 +11,7 @@ Version 1.17.2 (rgerhards), 2007-07-2?
   hooks, but not yet any active code
 - worked further on modularization
 - added $ModLoad MySQL (dummy) config directive
+- added DropTrailingLFOnReception config directive
 ---------------------------------------------------------------------------
 Version 1.17.1 (rgerhards), 2007-07-20
 - fixed a bug that caused make install to install rsyslogd and rklogd under
diff --git a/syslogd.c b/syslogd.c
index f2b78245..acb0d5e4 100644
--- a/syslogd.c
+++ b/syslogd.c
@@ -531,6 +531,7 @@ static struct code	FacNames[] = {
 };
 
 /* global variables for config file state */
+static int	bDropTrailingLF = 1; /* drop trailing LF's on reception? */
 int	Debug;		/* debug flag  - read-only after startup */
 static int	bFailOnChown;	/* fail if chown fails? */
 static uid_t	fileUID;	/* UID to be used for newly created files */
@@ -1932,6 +1933,16 @@ void printchopped(char *hname, char *msg, int len, int fd, int bParseHost)
 
 	dprintf("Message length: %d, File descriptor: %d.\n", len, fd);
 
+	/* we first check if we need to drop trailing LFs, which often make
+	 * their way into syslog messages unintentionally. In order to remain
+	 * compatible to recent IETF developments, we allow the user to
+	 * turn on/off this handling.  rgerhards, 2007-07-23
+	 */
+	if(bDropTrailingLF && *(msg + len - 1) == '\n') {
+		*(msg + len - 1) = '\0';
+		len--;
+	}
+
 	iMsg = 0;	/* initialize receiving buffer index */
 	pMsg = tmpline; /* set receiving buffer pointer */
 	pData = msg;	/* set source buffer pointer */
@@ -4060,6 +4071,8 @@ void cfsysline(uchar *p)
 		doBinaryOptionLine(&p, &bDebugPrintTemplateList);
 	} else if(!strcasecmp((char*) szCmd, "failonchownfailure")) { 
 		doBinaryOptionLine(&p, &bFailOnChown);
+	} else if(!strcasecmp((char*) szCmd, "droptrailinglfonreception")) { 
+		doBinaryOptionLine(&p, &bDropTrailingLF);
 	} else if(!strcasecmp((char*) szCmd, "resetconfigvariables")) { 
 		resetConfigVariables();
 	} else if(!strcasecmp((char*) szCmd, "modload")) { 
-- 
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