From 673d4544d1a0871428fb2d9bf0949b4ed72c386e Mon Sep 17 00:00:00 2001
From: Daniel Agar <daniel@agar.ca>
Date: Fri, 31 Dec 2021 10:22:13 -0500
Subject: [PATCH] parameters: verify param backup after export

---
 src/lib/parameters/parameters.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/lib/parameters/parameters.cpp b/src/lib/parameters/parameters.cpp
index 5e21348180..417f4414ee 100644
--- a/src/lib/parameters/parameters.cpp
+++ b/src/lib/parameters/parameters.cpp
@@ -1244,12 +1244,17 @@ int param_save_default()
 
 			if (fd_backup_file > -1) {
 				int backup_export_ret = param_export_internal(fd_backup_file, nullptr);
+				::close(fd_backup_file);
 
 				if (backup_export_ret != 0) {
 					PX4_ERR("backup parameter export to %s failed (%d)", param_backup_file, backup_export_ret);
-				}
 
-				::close(fd_backup_file);
+				} else {
+					// verify export
+					int fd_verify = ::open(param_backup_file, O_RDONLY, PX4_O_MODE_666);
+					param_verify(fd_verify);
+					::close(fd_verify);
+				}
 			}
 		}
 	}