From 3a31b448c000f0f6eb840010b4287565221d94a7 Mon Sep 17 00:00:00 2001
From: David Xu <davidxu@FreeBSD.org>
Date: Thu, 11 May 2006 09:10:33 +0000
Subject: [PATCH] Save errno before calling pthread_mutex_lock because
 pthread_mutex_lock may change errno unexpectly.

---
 lib/libc/gen/syslog.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/libc/gen/syslog.c b/lib/libc/gen/syslog.c
index 44efdaca99d7..e58e6956e15d 100644
--- a/lib/libc/gen/syslog.c
+++ b/lib/libc/gen/syslog.c
@@ -153,6 +153,8 @@ vsyslog(int pri, const char *fmt, va_list ap)
 		pri &= LOG_PRIMASK|LOG_FACMASK;
 	}
 
+	saved_errno = errno;
+
 	THREAD_LOCK();
 
 	/* Check priority against setlogmask values. */
@@ -161,8 +163,6 @@ vsyslog(int pri, const char *fmt, va_list ap)
 		return;
 	}
 
-	saved_errno = errno;
-
 	/* Set default facility if none specified. */
 	if ((pri & LOG_FACMASK) == 0)
 		pri |= LogFacility;