From 1e4adc512e1901e2c031bd375afe2825692620a5 Mon Sep 17 00:00:00 2001
From: Jean-Marc Lasgouttes <lasgouttes@lyx.org>
Date: Sat, 12 Sep 2015 23:49:32 +0200
Subject: [PATCH] In fileLock, take in account the case where the file cannot
 be opened

overity issue 23352
---
 src/support/filetools.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/support/filetools.cpp b/src/support/filetools.cpp
index bab96874e4..4c37fa1573 100644
--- a/src/support/filetools.cpp
+++ b/src/support/filetools.cpp
@@ -1219,14 +1219,17 @@ int fileLock(const char * lock_file)
 	int fd = -1;
 #if defined(HAVE_LOCKF)
 	fd = open(lock_file, O_CREAT|O_APPEND|O_SYNC|O_RDWR, 0666);
+	if (fd == -1)
+		return -1;
 	if (lockf(fd, F_LOCK, 0) != 0) {
 		close(fd);
-		return(-1);
+		return -1;
 	}
 #endif
-	return(fd);
+	return fd;
 }
 
+
 void fileUnlock(int fd, const char * /* lock_file*/)
 {
 #if defined(HAVE_LOCKF)
-- 
2.39.5