From 257e236c92bc0418a5070ab90c0ccb57301b9cfd Mon Sep 17 00:00:00 2001
From: Mark Whitehorn <kd0aij@gmail.com>
Date: Sat, 29 Oct 2016 08:40:21 -0600
Subject: [PATCH] add errno to error message

---
 src/modules/logger/log_writer_file.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/modules/logger/log_writer_file.cpp b/src/modules/logger/log_writer_file.cpp
index aeada55dc8..ae54502493 100644
--- a/src/modules/logger/log_writer_file.cpp
+++ b/src/modules/logger/log_writer_file.cpp
@@ -86,7 +86,7 @@ void LogWriterFile::start_log(const char *filename)
 	_fd = ::open(filename, O_CREAT | O_WRONLY, PX4_O_MODE_666);
 
 	if (_fd < 0) {
-		PX4_ERR("Can't open log file %s", filename);
+		PX4_ERR("Can't open log file %s, errno: %d", filename, errno);
 		_should_run = false;
 		return;